FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Hazen, BT
Overstreet, RE
Wang, YC
AF Hazen, Benjamin T.
Overstreet, Robert E.
Wang, Yacan
TI Predicting Public Bicycle Adoption Using the Technology Acceptance Model
SO SUSTAINABILITY
LA English
DT Article
DE bicycle-sharing; technology acceptance; perceived quality; structural
equation modeling; urban transportation; green logistics
ID USER ACCEPTANCE; PERCEIVED VALUE; INFORMATION-TECHNOLOGY; SERVICE;
QUALITY; SYSTEMS; SCHEME; DIFFUSION; MEDIATION; IMPACT
AB Bicycle sharing programs provide a sustainable mode of urban transportation. Although cities across the globe have developed these systems for their citizens and visitors, usage rates are not as high as anticipated. This research uses the technology acceptance model as the basis to understand one's intention to adopt bicycle sharing programs. Using survey data derived from 421 participants in Beijing, China, the proposed covariance-based structural equation model consisting of perceived quality, perceived convenience, and perceived value is found to predict 50.5% of the variance in adoption intention. The findings of this research contribute to theory and practice in the burgeoning literature on public bicycle systems and sustainable urban transportation by offering a theoretical lens through which to consider system adoption, and providing information to practitioners as to what factors might contribute most to adoption.
C1 [Hazen, Benjamin T.] Univ Tennessee, Dept Mkt & Supply Chain Management, Knoxville, TN 37996 USA.
[Hazen, Benjamin T.; Overstreet, Robert E.] US Air Force, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
[Wang, Yacan] Beijing Jiaotong Univ, Dept Econ, Beijing 100044, Peoples R China.
RP Wang, YC (reprint author), Beijing Jiaotong Univ, Dept Econ, Beijing 100044, Peoples R China.
EM hazen@utk.edu; robert.overstreet@us.af.mil; ycwang@bjtu.edu.cn
OI Overstreet, Robert/0000-0002-5047-2415
FU National Natural Science Foundation of China [71390334]; National Social
Science Foundation of China [13ZD026]; Humanity and Social Science Youth
Foundation of Ministry of Education of China [13YJCZH186]; Fundamental
Research Funds for the Central Universities of China [2014JBM046,
2013JBZ019]
FX This research was funded by "Key Project of National Natural Science
Foundation of China (71390334)", "Key Project of National Social Science
Foundation of China (13&ZD026)", "Humanity and Social Science Youth
Foundation of Ministry of Education of China (13YJCZH186)" and
"Fundamental Research Funds for the Central Universities of China
(2013JBZ019, 2014JBM046)".
NR 61
TC 2
Z9 2
U1 9
U2 21
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2071-1050
J9 SUSTAINABILITY-BASEL
JI Sustainability
PD NOV
PY 2015
VL 7
IS 11
BP 14558
EP 14573
DI 10.3390/su71114558
PG 16
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Environmental Sciences;
Environmental Studies
SC Science & Technology - Other Topics; Environmental Sciences & Ecology
GA DC2ZR
UT WOS:000369088600007
ER
PT J
AU Wang, ZH
Blasch, E
Chen, GS
Shen, D
Lin, XP
Pham, K
AF Wang, Zhonghai
Blasch, Erik
Chen, Genshe
Shen, Dan
Lin, Xingping
Pham, Khanh
TI A Low-Cost, Near-Real-Time Two-UAS-Based UWB Emitter Monitoring System
SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
LA English
DT Article
ID FDOA MEASUREMENTS; LOCATION; LOCALIZATION; TDOA
C1 [Wang, Zhonghai; Chen, Genshe; Shen, Dan; Lin, Xingping] Intelligent Fus Technol Inc, Germantown, MD 20876 USA.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY 13441 USA.
[Pham, Khanh] US Air Force, Res Lab, Kirtland AFB, NM 87114 USA.
RP Wang, ZH (reprint author), Intelligent Fus Technol Inc, 20271 Goldenrod Lane,Suite 2066, Germantown, MD 20876 USA.
EM zwang@intfusiontech.com; erik.blasch.1@us.af.mil;
gchen@intfusiontech.com; dshen@intfusiontech.com;
slin@intfusiontech.com; khanh.pham.1@us.af.mil
FU Defense Advanced Research Projects Agency [W31P4Q12C0128]
FX The authors appreciate guidance, comments, and feedback from Dr. Daniel
Purdy. The work was supported in part by the Defense Advanced Research
Projects Agency under contract W31P4Q12C0128. The views and conclusions
contained herein are those of the authors and should not be interpreted
as necessarily representing the official policies, either expressed or
implied, of the Air Force Research Laboratory or the U.S. government.
NR 22
TC 0
Z9 0
U1 2
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8985
EI 1557-959X
J9 IEEE AERO EL SYS MAG
JI IEEE Aerosp. Electron. Syst. Mag.
PD NOV
PY 2015
VL 30
IS 11
BP 4
EP 11
DI 10.1109/MAES.2015.140219
PG 8
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA DB3ZA
UT WOS:000368451200001
ER
PT J
AU Sasikumar, A
Arehart, AR
Via, GD
Winningham, B
Poling, B
Heller, E
Ringel, SA
AF Sasikumar, A.
Arehart, A. R.
Via, G. D.
Winningham, B.
Poling, B.
Heller, E.
Ringel, S. A.
TI Identification of an RF degradation mechanism in GaN based HEMTs
triggered by midgap traps
SO MICROELECTRONICS RELIABILITY
LA English
DT Article
DE Gallium nitride; High electron mobility transistors (HEMTs); Traps;
Degradation; Reliability; Deep level transient spectroscopy (DLTS); Deep
level optical spectroscopy (DLOS)
ID ELECTRON-MOBILITY TRANSISTORS; MOLECULAR-BEAM EPITAXY; IMPACT; STATES
AB Quantitative defect spectroscopy was performed on low gate leakage operational S-band GaN HEMTs before and after RF accelerated life testing (ALT) to investigate and quantify potential connections between the evolution of observed traps and RF output power loss in these HEMTs after stressing. Constant drain current deep level transient spectroscopy and deep level optical spectroscopy (CID-DLTS and CID-DLOS, respectively) were used to interrogate thermally-emitting traps (CID-DLTS) and deeper optically-stimulated traps (CID-DLOS) so that the entire bandgap can be probed systematically before and after ALT. Using drain-controlled CID-DLTS/DLOS, with which traps in the drain access region are resolved, it is found that an increase in the concentration of a broad range of deep states between E-C-1.6 to 3.0 eV, detected by CID-DLOS, causes a persistent increase in on-resistance of similar to 0.22 Omega-mm, which is a likely source for the 1.2 dB reduction in RF output power that was observed after stressing. In contrast, the combined effect of the upper bandgap states at E-C-0.57 and E-C-0.72 eV, observed by CID-DLTS, is responsible for only similar to 10% of the on-resistance increase. These results demonstrate the importance of discriminating between traps throughout the entire bandgap with regard to the relative roles of individual traps on degradation of GaN HEMTs after ALT. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Sasikumar, A.; Arehart, A. R.; Ringel, S. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Via, G. D.; Winningham, B.; Heller, E.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Poling, B.] Wyle Labs, Dayton, OH 45431 USA.
RP Ringel, SA (reprint author), Ohio State Univ, Columbus, OH 43210 USA.
EM ringel.5@osu.edu
FU Office of Naval Research [N00014-13-1-0796, N00014-09-1-0242]
FX The work at the Ohio State University was partially supported by the
Office of Naval Research under contracts N00014-13-1-0796 and
N00014-09-1-0242.
NR 17
TC 0
Z9 0
U1 3
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0026-2714
J9 MICROELECTRON RELIAB
JI Microelectron. Reliab.
PD NOV
PY 2015
VL 55
IS 11
BP 2258
EP 2262
DI 10.1016/j.microrel.2015.07.048
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA CZ7LY
UT WOS:000367282100016
ER
PT J
AU Zahadat, N
Blessner, P
Blackburn, T
Olson, BA
AF Zahadat, Nima
Blessner, Paul
Blackburn, Timothy
Olson, Bill A.
TI BYOD security engineering: A framework and its analysis
SO COMPUTERS & SECURITY
LA English
DT Article
DE Mobile Device Management system (MDM); Mobile security; Bring Your Own
Device (BYOD); Policy management; BYOD Security Framework; BYOD
Lifecycle
ID INFORMATION SECURITY; MANAGEMENT
AB With the rapid increase of smartphones and tablets, security concerns have also been on the rise. Employees find it desirable to use personal mobile devices for their work and make no distinction between using their carriers' services versus their organizations' Wi-Fi. Bring Your Own Device (BYOD) is an extension of corporate networks and thus it is essential to secure BYODs to protect enterprise networks (Wang and Vangury, 2014).
In this paper, risks of allowing BYOD balanced by its benefits will be examined. The paper has three overarching objectives. The first is to address the security concerns of BYOD, which necessitate technology, policy management, and people integration instead of the traditional technology alone approach. The second is to propose a BYOD Security Framework as the solution to BYOD security concerns. The framework has three pillars: People, Policy Management, and Technology. It will be demonstrated that these three pillars are necessary in order to secure BYOD implementations in enterprises.The final objective is to validate the framework. This is done via an empirical survey conducted on a pool of 114 industry security practitioners. The resulting dataset is analyzed to dAUg etermine the association between the level of the BYOD Security Framework elements being de facto implemented in organizations and the frequency of security breaches associated with BYOD in those organizations to confirm key elements of the framework. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Zahadat, Nima] George Washington Univ, US Air Force, Washington, DC 20052 USA.
[Zahadat, Nima] George Washington Univ, Syst Engn, Washington, DC 20052 USA.
[Blessner, Paul] George Washington Univ, Engn Management & Syst Engn, Washington, DC 20052 USA.
[Blackburn, Timothy; Olson, Bill A.] George Washington Univ, Washington, DC 20052 USA.
RP Zahadat, N (reprint author), George Washington Univ, US Air Force, Washington, DC 20052 USA.
EM nzahadat@gwu.edu; pbless@gwu.edu; timb@gwmail.gwu.edu; bolson@gwu.edu
NR 51
TC 7
Z9 7
U1 13
U2 29
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
OXFORD OX5 1GB, OXON, ENGLAND
SN 0167-4048
EI 1872-6208
J9 COMPUT SECUR
JI Comput. Secur.
PD NOV
PY 2015
VL 55
BP 81
EP 99
DI 10.1016/j.cose.2015.06.011
PG 19
WC Computer Science, Information Systems
SC Computer Science
GA CZ5ED
UT WOS:000367124400005
ER
PT J
AU Mangina, RS
Enloe, CL
Font, GI
AF Mangina, R. S.
Enloe, C. L.
Font, G. I.
TI Dielectric barrier discharge-based plasma actuator operation in
artificial atmospheres for validation of modeling and simulation
SO PHYSICS OF PLASMAS
LA English
DT Article
AB We present an experimental case study of time-resolved force production by an aerodynamic plasma actuator immersed in various mixtures of electropositive (N-2) and electronegative gases (O-2 and SF6) at atmospheric pressure using a fixed AC high-voltage input of 16 kV peak amplitude at 200 Hz frequency. We have observed distinct changes in the discharge structures during both negative-and positive-going voltage half-cycles, with corresponding variations in the actuator's force production: a ratio of 4:1 in the impulse produced by the negative-going half-cycle of the discharge among the various gas mixtures we explored, 2:1 in the impulse produced by the positive-going half-cycle, and cases in which the negative-going half-cycle dominates force production (by a ratio of 1.5:1), where the half-cycles produce identical force levels, and where the positive-going half cycle dominates (by a ratio of 1:5). We also present time-resolved experimental evidence for the first time that shows electrons do play a significant role in the momentum coupling to surrounding neutrals during the negative going voltage half-cycle of the N-2 discharge. We show that there is sufficient macroscopic variation in the plasma that the predictions of numerical models at the microscopic level can be validated even though the plasma itself cannot be measured directly on those spatial and temporal scales.
C1 [Mangina, R. S.; Enloe, C. L.; Font, G. I.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Mangina, RS (reprint author), US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
FU Air Force Office of Scientific Research through National Research
Council [FA9550-12-D-0001]; U.S. Air Force Academy
FX One of the author's (R.S.M.) senior fellowship was sponsored by Air
Force Office of Scientific Research through National Research Council
under contract (No. FA9550-12-D-0001) with U.S. Air Force Academy.
NR 14
TC 1
Z9 1
U1 3
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD NOV
PY 2015
VL 22
IS 11
AR 114502
DI 10.1063/1.4935380
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA CX9VX
UT WOS:000366054900092
ER
PT J
AU Camberos, JA
Kolonay, RM
Eastep, FE
Taylor, RF
AF Camberos, J. A.
Kolonay, R. M.
Eastep, F. E.
Taylor, R. F.
TI An efficient method for predicting zero-lift or boundary-layer drag
including aeroelastic effects for the design environment
SO AERONAUTICAL JOURNAL
LA English
DT Article
AB One of the aerospace design engineer's goals aims to reduce drag for increased aircraft performance, in terms of range, endurance, or speed in the various flight regimes. To accomplish this, the designer must have rapid and accurate techniques for computing drag. At subsonic Mach numbers drag is primarily a sum of lift-induced drag and zero-lift drag. While lift-induced drag is easily and efficiently determined by a far field method, using the Trefftz plane analysis, the same cannot be said of zero-lift drag. Zero-lift drag (C-D,C-0) usually requires consideration of the Navier-Stokes equations, the solution of which is as yet unknown except by using approximate numerical techniques with computational fluid dynamics (CFD). The approximate calculation of zero-lift drag from CFD is normally computed with so-called near-field techniques, which can be inaccurate and too time consuming for consideration in the design environment. This paper presents a technique to calculate zero-lift and boundary-layer drag in the subsonic regime that includes aeroelastic effects and is suitable for the design environment. The technique loosely couples a two-dimensional aerofoil boundary-layer model with a 3D aeroelastic solver to compute zero-lift drag. We show results for a rectangular wing (baseline), a swept wing, and a tapered wing. Then compare with a rectangular wing with variable thickness and camber, thinning out from the root to tip (spanwise direction), thus demonstrating the practicality of the technique and its utility for rapid conceptual design.
C1 [Camberos, J. A.; Kolonay, R. M.] US Air Force Res Lab, Dayton, OH 45400 USA.
[Eastep, F. E.] Univ Dayton, Dayton, OH 45469 USA.
[Taylor, R. F.] Wright State Univ, Dayton, OH 45435 USA.
RP Camberos, JA (reprint author), US Air Force Res Lab, Dayton, OH 45400 USA.
NR 9
TC 0
Z9 0
U1 1
U2 2
PU ROYAL AERONAUTICAL SOC
PI LONDON
PA 4 HAMILTON PL, LONDON W1J 7BQ, ENGLAND
SN 0001-9240
J9 AERONAUT J
JI Aeronaut. J.
PD NOV
PY 2015
VL 119
IS 1221
BP 1451
EP 1460
PG 10
WC Engineering, Aerospace
SC Engineering
GA CY3YD
UT WOS:000366344900007
ER
PT J
AU Huang, D
Gumbs, G
Abranyos, Y
Pepper, M
Kumar, S
AF Huang, Danhong
Gumbs, Godfrey
Abranyos, Yonatan
Pepper, Michael
Kumar, Sanjeev
TI Quantum ballistic transport by interacting two-electron states in
quasi-one-dimensional channels
SO AIP ADVANCES
LA English
DT Article
ID SPIN POLARIZATION; OSCILLATIONS; DOTS
AB For quantum ballistic transport of electrons through a short conduction channel, the role of Coulomb interaction may significantly modify the energy levels of two-electron states at low temperatures as the channel becomes wide. In this regime, the Coulomb effect on the two-electron states is calculated and found to lead to four split energy levels, including two anticrossing-level and two crossing-level states. Moreover, due to the interplay of anticrossing and crossing effects, our calculations reveal that the ground two-electron state will switch from one anticrossing state (strong confinement) to a crossing state (intermediate confinement) as the channel width gradually increases and then back to the original anticrossing state (weak confinement) as the channel width becomes larger than a threshold value. This switching behavior leaves a footprint in the ballistic conductance as well as in the diffusion thermoelectric power of electrons. Such a switching is related to the triple spin degeneracy as well as to the Coulomb repulsion in the central region of the channel, which separates two electrons away and pushes them to different channel edges. The conductance reoccurrence region expands from the weak to the intermediate confinement regime with increasing electron density. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Huang, Danhong] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Huang, Danhong; Gumbs, Godfrey] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
[Abranyos, Yonatan] CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10065 USA.
[Pepper, Michael; Kumar, Sanjeev] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England.
[Pepper, Michael; Kumar, Sanjeev] London Ctr Nanotechnol, London WC1H 0AH, England.
RP Huang, D (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
FU Air Force Office of Scientific Research (AFOSR); EPSRC (UK)
FX The theoretical part of this research was supported by the Air Force
Office of Scientific Research (AFOSR) while the experimental part was
supported by EPSRC (UK).
NR 33
TC 0
Z9 0
U1 4
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD NOV
PY 2015
VL 5
IS 11
AR 117227
DI 10.1063/1.4936187
PG 16
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CX9WB
UT WOS:000366055300078
ER
PT J
AU Kolonay, RM
Kobayashi, MH
AF Kolonay, Raymond M.
Kobayashi, Marcelo H.
TI Optimization of Aircraft Lifting Surfaces Using a Cellular Division
Method
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID TOPOLOGY OPTIMIZATION; MATHEMATICAL MODELS; DESIGN; FILAMENTS; INPUTS
AB The development of a biologically inspired methodology for topology, shape, sizing, and control surface optimization of aircraft lifting surfaces is presented. The methodology is based on the map L-systems modeling of cellular division to generate the substructure topology. This is combined with variables for aerodynamic shape, structural sizing, and control surfaces (number, size, location, and aeroelastic trimmed settings) and constraints on stiffness, strength, local skin panel buckling, static aeroelastic response (roll performance, pitch rate, trimmed angle of attack), and flutter requirements. A dual-objective function is formulated with weight and L/D and is solved with a bilevel optimization algorithm. The map L-system rules that develop the topology are evolved using a genetic algorithm in the outer optimization loop on L/D and weight, which obtains the optimal parameter settings for topology, shape, and control surfaces, whereas the inner loop performs weight minimization with the structural sizing variables. The methodology is demonstrated on the design of a generic fighter aircraft wing.
C1 [Kolonay, Raymond M.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Kobayashi, Marcelo H.] Univ Hawaii Manoa, Dept Mech Engn, Honolulu, HI 96822 USA.
RP Kolonay, RM (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM Raymond.Kolonay@us.af.mil; marcelok@hawaii.edu
NR 42
TC 0
Z9 0
U1 2
U2 4
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD NOV-DEC
PY 2015
VL 52
IS 6
BP 2051
EP 2063
DI 10.2514/1.C033138
PG 13
WC Engineering, Aerospace
SC Engineering
GA CY1IA
UT WOS:000366158700025
ER
PT J
AU Kelly, TD
Petrosky, JC
McClory, JW
Mann, JM
Kolis, JW
AF Kelly, T. D.
Petrosky, J. C.
McClory, J. W.
Mann, J. M.
Kolis, J. W.
TI Analysis of oxygen shell splitting in hydrothermally grown single
crystal ThO2(200)
SO PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
LA English
DT Article
DE X-ray absorption fine structure; actinides; ThO2; latin hypercubes; O
defects; single crystals
ID URANIUM-DIOXIDE; THORIUM-DIOXIDE; LOCAL-STRUCTURE; EXAFS; THO2;
TEMPERATURE; ENERGETICS; DIFFUSION; SYSTEM
AB Single crystals of ThO2 have been synthesized using hydrothermal growth and studied using the X-ray absorption fine structure (XAFS) technique. The extended X-ray absorption fine structure (EXAFS) has been extracted from the XAFS and analyzed using a novel, computational Latin hypercube sampling method. The methodology not only confirms the expected space group and crystal structure, it also identifies the origin of a previously reported split O shell. Since EXAFS is a local order analysis technique, the O shell splitting is identified as an O atom occupying an interstitial site. This result is significant for examining O-2-transport in a ThO2 matrix and corroborating research indicating partial Th 5f occupancy that is similar to hyper-stoichiometric UO2+x compounds. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Kelly, T. D.; Petrosky, J. C.; McClory, J. W.] Air Force Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
[Mann, J. M.] Sensors Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kolis, J. W.] Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
[Kolis, J. W.] Clemson Univ, Ctr Opt Mat Sci & Engn Technol, Clemson, SC 29634 USA.
RP Kelly, TD (reprint author), Air Force Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Tony.Kelly@afit.edu; James.Petrosky@afit.edu
FU Defense Threat Reduction Agency [HDTRA138584]
FX This work was supported by the Defense Threat Reduction Agency (Grant
No. HDTRA138584). The views expressed in this article are those of the
authors and do not reflect the official policy or position of the Air
Force, Department of Defense or the U.S. Government. Special thank you
to Dr. Peter Dowben from the University of Nebraska-Lincoln for his
expertise and use of equipment at the CAMD beamline.
NR 35
TC 0
Z9 0
U1 4
U2 9
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 1862-6254
EI 1862-6270
J9 PHYS STATUS SOLIDI-R
JI Phys. Status Solidi-Rapid Res. Lett.
PD NOV
PY 2015
VL 9
IS 11
BP 668
EP 672
DI 10.1002/pssr.201510235
PG 5
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA CY3MB
UT WOS:000366312700011
ER
PT J
AU Phillips, DM
Ray, CW
Hagen, BJ
Su, W
Baur, JW
Reich, GW
AF Phillips, D. M.
Ray, C. W.
Hagen, B. J.
Su, W.
Baur, J. W.
Reich, G. W.
TI Detection of flow separation and stagnation points using artificial hair
sensors
SO SMART MATERIALS AND STRUCTURES
LA English
DT Article
DE hair sensor; carbon nanotube array; piezoresistive transduction;
stagnation point; separation point; heading estimation
ID CELL
AB Recent interest in fly-by-feel approaches for aircraft control has motivated the development of novel sensors for use in aerial systems. Artificial hair sensors (AHSs) are one type of device that promise to fill a unique niche in the sensory suite for aerial systems. In this work, we investigate the capability of an AHS based on structural glass fibers to directly identify flow stagnation and separation points on a cylindrical domain in a steady flow. The glass fibers are functionalized with a radially aligned carbon nanotube (CNT) forest and elicit a piezoresistive response as the CNT forest impinges on electrodes in a micropore when the hair is deflected due to viscous drag forces. Particle image velocimetry is used to measure the flow field allowing for the resulting moment and force acting on the hair to be correlated with the electrical response. It is demonstrated that the AHS provides estimates for the locations of both the stagnation and separation in steady flow. From this, a simulation of a heading estimation is presented to demonstrate a potential application for hair sensors. These results motivate the construction of large arrays of hair sensors for imaging and resolving flow structures in real time.
C1 [Phillips, D. M.; Baur, J. W.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Phillips, D. M.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Ray, C. W.] Jelec Inc, Houston, TX 77084 USA.
[Hagen, B. J.; Reich, G. W.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Hagen, B. J.] Sierra Lobo, Wright Execut Ctr, Fairborn, OH 45324 USA.
[Su, W.] Univ Alabama, Dept Aerosp Engn & Mech, Tuscaloosa, AL 35487 USA.
RP Phillips, DM (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM gregory.reich.1@us.af.mil
RI Su, Weihua/F-1561-2011
OI Su, Weihua/0000-0002-4458-0524
FU Air Force Office of Scientific Research [LRIR 09RW10COR]
FX This work was funded by the Air Force Office of Scientific Research LRIR
09RW10COR. The authors would like to thank Dr Les Lee at AFOSR for his
interest and support throughout this project.
NR 25
TC 2
Z9 2
U1 2
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0964-1726
EI 1361-665X
J9 SMART MATER STRUCT
JI Smart Mater. Struct.
PD NOV
PY 2015
VL 24
IS 11
AR 115026
DI 10.1088/0964-1726/24/11/115026
PG 10
WC Instruments & Instrumentation; Materials Science, Multidisciplinary
SC Instruments & Instrumentation; Materials Science
GA CY0QU
UT WOS:000366111400028
ER
PT J
AU Geffre, JL
Brown, DE
AF Geffre, Jennifer L.
Brown, Donald E.
TI Strategic Threat Probabilities with Hierarchical Spatiotemporal
Predictions
SO IEEE INTELLIGENT SYSTEMS
LA English
DT Article
C1 [Geffre, Jennifer L.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Brown, Donald E.] Univ Virginia, Data Sci Inst, Charlottesville, VA 22903 USA.
[Brown, Donald E.] Univ Virginia, Dept Syst & Informat Engn, Charlottesville, VA 22903 USA.
RP Geffre, JL (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM jg8fd@virginia.edu; deb@vir-ginia.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1541-1672
EI 1941-1294
J9 IEEE INTELL SYST
JI IEEE Intell. Syst.
PD NOV-DEC
PY 2015
VL 30
IS 6
BP 72
EP 80
PG 9
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA CW5IY
UT WOS:000365030200016
ER
PT J
AU Young, JA
Crofton, MW
Ferguson, DC
Hoffmann, RC
Wheelock, AT
Steele, K
Likar, JJ
Schneider, TA
Vaughn, JA
Bodeau, JM
Noushkam, N
Vayner, BV
AF Young, J. A.
Crofton, M. W.
Ferguson, D. C.
Hoffmann, R. C.
Wheelock, A. T.
Steele, K.
Likar, J. J.
Schneider, T. A.
Vaughn, J. A.
Bodeau, J. M.
Noushkam, N.
Vayner, B. V.
TI Preliminary Measurements of ESD Propagation on a Round Robin Coupon
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Electrostatic discharge (ESD); flashover; plasma propagation; solar
array; vacuum discharge
ID SOLAR-ARRAY; ENVIRONMENT; DISCHARGE; EXPANSION; PANEL
AB The propagation dynamics of spacecraft electrostatic discharge (ESD) flashover plasmas have been a topic of increasing interest in the past few years. To investigate ESD propagation and possible contributions from facilities, methodology, and analysis, we performed inverted gradient ESD tests of an International Space Station solar array coupon as part of a U.S.-wide Round-Robin test campaign. Geosynchronous earth orbit charging environments were simulated and current transients were simultaneously measured on ten solar array strings. In addition, images of ESD events were collected by low-and high-speed cameras, and an array of eight Langmuir probes positioned above the coupon was monitored. Preliminary results will be discussed, with special attention given to the effect of different analysis techniques on derived propagation velocity. Comparisons will be made with the results from other labs, and implications for spacecraft ESD events will be discussed.
C1 [Young, J. A.; Crofton, M. W.] Aerosp Corp, El Segundo, CA 90245 USA.
[Ferguson, D. C.; Hoffmann, R. C.; Wheelock, A. T.] Air Force Res Lab, Albuquerque, NM 87131 USA.
[Steele, K.] Alliant Techsyst, Goleta, CA 93117 USA.
[Likar, J. J.] UTC Aerosp Syst, Danbury, CT 06810 USA.
[Schneider, T. A.; Vaughn, J. A.] Marshall Space Flight Ctr, Huntsville, AL 35805 USA.
[Bodeau, J. M.] Northrop Grumman Aerosp, Redondo Beach, CA 90278 USA.
[Noushkam, N.] Orbital Sci Corp, El Segundo, CA 90245 USA.
[Vayner, B. V.] Ohio Aerosp Inst, Brookpark, OH 44142 USA.
RP Young, JA (reprint author), Aerosp Corp, El Segundo, CA 90245 USA.
EM jason.a.young@aero.org; mark.w.crofton@aero.org;
dale.ferguson.1@us.af.mil; ryan.hoffmann@us.af.mil;
adrian.wheelock@us.af.mil; kenneth.steele@atk.com;
justin.likar@utas.utc.com; todd.schneider@nasa.gov;
jason.a.vaughn@nasa.gov; michael.bodeau@ngc.com;
noushkam.nikki@orbital.com; boris.v.vayner@nasa.gov
FU Aerospace Corporation's Independent Research and Development Program
FX This research was supported by The Aerospace Corporation's Independent
Research and Development Program.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD NOV
PY 2015
VL 43
IS 11
BP 3939
EP 3947
DI 10.1109/TPS.2015.2479188
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA CW3EW
UT WOS:000364875800022
ER
PT J
AU Al-Rjoub, MF
Roy, AK
Ganguli, S
Banerjee, RK
AF Al-Rjoub, Marwan F.
Roy, Ajit K.
Ganguli, Sabyasachi
Banerjee, Rupak K.
TI Enhanced heat transfer in a micro-scale heat exchanger using
nano-particle laden electro-osmotic flow
SO INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
LA English
DT Article
DE EOF; Micro-scale heat exchanger; Hot spot cooling; Al2O3 nano-particles
ID THERMAL-CONDUCTIVITY; MICROCHANNEL; NANOFLUIDS; SIZE
AB This research presents a multi-channel micro-scale heat exchanger for thermal management of microelectronics hot spots. Electro-osmotic flow (EOF) was implemented to drive the cooling liquid through the micro-channels of the heat exchanger. Various cooling liquids including, deionized water, distilled water, borax buffer, and Al2O3 nano-particle solution, were tested and compared based on their flow rates and increase in cooling liquid temperature. The micro-scale heat exchanger was fabricated using a combination of polydimethylsiloxane (PDMS) and silicon dioxide-coated substrate. A constant heat flux heater was used to simulate the heat generated by microelectronic devices. The flow rate of the cooling liquid and its temperatures at the inlet and the outlet reservoirs were measured. Deionized water produced a flow rate of 30.1 mu L/min and 2 degrees C increase between the inlet and the outlet reservoir temperatures at 1 W heating power and 400 V of EOF. The flow rate and the increase in temperature of distilled water at the same conditions were 22.7 mu L/min and 3 degrees C, respectively. For the borax buffer the flow rate was 33.1 mu L/min and the increase in temperature was 2.7 degrees C. Most notably, there was an increase in temperature of 2.4 degrees C with a lower flow rate of 20.4 mu L/min when the Al2O3 nano-particle solution was used. Among all cooling liquids, the Al2O3 nano-particle solution showed the highest scaled specific heat energy removal with a maximum of similar to 69% increase compared to deionized water. Further, the current micro-scale heat exchanger device was able to produce higher electro-osmotic flow rates due to the use of PDMS on three sides of the micro-channel; thus providing smoother walls and higher zeta-potential while the silicon surface allowed heat transfer to the cooling liquid. The increased flow rate allowed enhanced heat removal from higher heat flux areas (hot spots) of microelectronic devices without the need for high-pressure pumping systems. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Al-Rjoub, Marwan F.; Banerjee, Rupak K.] Univ Cincinnati, Mech & Mat Engn Dept, Cincinnati, OH 45220 USA.
[Roy, Ajit K.; Ganguli, Sabyasachi] Air Force Res Lab, Nanoelect Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Banerjee, RK (reprint author), Univ Cincinnati, Mech & Mat Engn Dept, Cincinnati, OH 45220 USA.
EM rupak.banerjee@uc.edu
NR 20
TC 2
Z9 2
U1 7
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0735-1933
EI 1879-0178
J9 INT COMMUN HEAT MASS
JI Int. Commun. Heat Mass Transf.
PD NOV
PY 2015
VL 68
BP 228
EP 235
DI 10.1016/j.icheatmasstransfer.2015.09.009
PG 8
WC Thermodynamics; Mechanics
SC Thermodynamics; Mechanics
GA CW5SP
UT WOS:000365057200029
ER
PT J
AU Kim, JO
Ku, Z
Urbas, A
Lee, SJ
AF Kim, Jun Oh
Ku, Zahyun
Urbas, Augustine
Lee, Sang Jun
TI Investigation of the shape of submonolayer quantum dots using a
polarization-dependent photocurrent
SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 19th International Conference on Microscopy of Semiconducting Materials
CY MAR 29-APR 02, 2015
CL Univ Cambridge, Muray Edwards Coll, Cambridge, ENGLAND
SP Inst Phys, HREM Res
HO Univ Cambridge, Muray Edwards Coll
DE submonolayer; quantum dot; photodetector; infrared
ID INFRARED PHOTODETECTORS; ABSORPTION; LASERS
AB Structural and optical characterization of multi-stack InAs/InGaAs submonolayer quantum dots (SML-QDs) grown under the Stranski-Krastanov growth mode was performed via a polarization-dependent study. Various angular in-plane (plane perpendicular to growth direction) and out-of-plane (plane parallel to the 45 degrees-polished facet) polarization-dependent spectral photocurrents were measured to investigate the three-dimensional quantum confinement in multi-stack 0.3 monolayer InAs SML-QDs (the shape of SML-QDs embedded in an SML-QD based photodetector). Scanning transmission electron microscopy images revealed the interdiffusion of indium atoms between SML-QDs and the InGaAs quantum well due to an insufficient amount of indium, which agrees well with the tendency of s- to z-polarized response ratios.
C1 [Kim, Jun Oh; Lee, Sang Jun] Korea Res Inst Stand & Sci, Daejeon 305340, South Korea.
[Ku, Zahyun; Urbas, Augustine] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Kim, JO (reprint author), Korea Res Inst Stand & Sci, Daejeon 305340, South Korea.
EM sjlee@kriss.re.kr
FU KRISS [GP2014-0028, JP2014-0009]; Korea Evaluation Institute of
Industrial Technology (KEIT) grant - Korea government (MOTIE)
[10046953]; AOARD grant - US government (AFOSR/AOARD) [FA2386-14-1-4074]
FX This work was supported by the KRISS grants GP2014-0028 and JP2014-0009,
the Korea Evaluation Institute of Industrial Technology (KEIT) grant
10046953 funded by the Korea government (MOTIE), and the AOARD grant
FA2386-14-1-4074 funded by the US government (AFOSR/AOARD).
NR 22
TC 0
Z9 0
U1 1
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0268-1242
EI 1361-6641
J9 SEMICOND SCI TECH
JI Semicond. Sci. Technol.
PD NOV
PY 2015
VL 30
IS 11
AR 115005
DI 10.1088/0268-1242/30/11/115005
PG 5
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA CW8HT
UT WOS:000365240800022
ER
PT J
AU Grasmick, JG
Mooney, MA
Senseney, CT
Surdahl, RW
Voth, M
AF Grasmick, Jacob G.
Mooney, Michael A.
Senseney, Christopher T.
Surdahl, Roger W.
Voth, Michael
TI Comparison of Multiple Sensor Deflection Data From Lightweight and
Falling Weight Deflectometer Tests on Layered Soil
SO GEOTECHNICAL TESTING JOURNAL
LA English
DT Article
DE lightweight deflectometer; fallingweight deflectometer; field testing;
pavement foundations; elasticmodulus
ID PAVEMENT; STIFFNESS; MODULUS
AB The lightweight deflectometer (LWD) and falling weight deflectometer (FWD) are in situ dynamic plate load tests used to estimate the stiffness and elastic moduli of bound and unbound materials. The inclusion of radial offset sensors with LWD testing stemmed from the well-established FWD testing method of using deflections at the load plate center and at radial offsets to generate a deflection bowl to estimate the moduli of individual layers in a multi-layer system. Due to the similarities between the LWD and FWD tests, several studies have explored the relationship between center deflection results of the two tests. However, little research exists in the literature addressing LWD testing with multiple sensors and how well those deflections correlate with FWD deflections at the same radial offsets. To this end, 114 multiple sensor LWD and FWD tests were performed on stabilized base materials at three sites and rigorously analyzed to determine if there is a consistent relationship between LWD and FWD center and radial offset deflections across all sites and if the estimated moduli from the same backcalculation approach produce similar or correlated results. The results demonstrated that while relationships are site specific for deflections and moduli estimated from the load plate center, a consistent relationship across all sites is demonstrated from the radial offset measurements. Finite element analysis was conducted to understand the difference in induced strains from the two tests to support and better understand the observed differences in FWD and LWD deflections and backcalculated layer moduli.
C1 [Grasmick, Jacob G.; Mooney, Michael A.] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
[Senseney, Christopher T.] US Air Force Acad, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
[Surdahl, Roger W.; Voth, Michael] Fed Highway Adm, Cent Fed Lands Highway Div, Lakewood, CO 80228 USA.
RP Grasmick, JG (reprint author), Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
EM jgrasmic@mines.edu
FU Federal Highway Administration; Central Federal Lands Division
FX The writers would like to acknowledge the Federal Highway Administration
and the Central Federal Lands Division for the technical and financial
support of this study.
NR 37
TC 0
Z9 0
U1 7
U2 12
PU AMER SOC TESTING MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA
SN 0149-6115
EI 1945-7545
J9 GEOTECH TEST J
JI Geotech. Test. J.
PD NOV
PY 2015
VL 38
IS 6
AR GTJ20140172
DI 10.1520/GTJ20140172
PG 13
WC Engineering, Geological; Geosciences, Multidisciplinary
SC Engineering; Geology
GA CW6BO
UT WOS:000365082300005
ER
PT J
AU Hesselbrock, R
AF Hesselbrock, Roger
TI Use of Descriptive Terms in Medical Records
SO JAMA NEUROLOGY
LA English
DT Letter
C1 [Hesselbrock, Roger] USAF, Sch Aerosp Med, Neuropsychiat Branch, USAFSAM FECN, Wright Patterson AFB, OH 43533 USA.
RP Hesselbrock, R (reprint author), USAF, Sch Aerosp Med, Neuropsychiat Branch, USAFSAM FECN, Bldg 840,2510 Fifth St, Wright Patterson AFB, OH 43533 USA.
EM rrhesselbrock@gmail.com
NR 1
TC 0
Z9 0
U1 0
U2 0
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 330 N WABASH AVE, STE 39300, CHICAGO, IL 60611-5885 USA
SN 2168-6149
EI 2168-6157
J9 JAMA NEUROL
JI JAMA Neurol.
PD NOV
PY 2015
VL 72
IS 11
BP 1378
EP 1378
PG 1
WC Clinical Neurology
SC Neurosciences & Neurology
GA CW1ZO
UT WOS:000364790900029
PM 26551962
ER
PT J
AU An, XL
Brittelle, MS
Lauzier, PT
Gord, JR
Roy, S
Chen, GH
Sanders, ST
AF An, Xinliang
Brittelle, Mack S.
Lauzier, Pascal T.
Gord, James R.
Roy, Sukesh
Chen, Guang-Hong
Sanders, Scott T.
TI Demonstration of temperature imaging by H2O absorption spectroscopy
using compressed sensing tomography
SO APPLIED OPTICS
LA English
DT Article
ID INFRARED-ABSORPTION; COMPUTED-TOMOGRAPHY; OPTICAL TOMOGRAPHY; LIMITED
NUMBER; RECONSTRUCTION; DISTRIBUTIONS; PROJECTIONS; ALGORITHMS; SYSTEM;
ENGINE
AB This paper introduces temperature imaging by total-variation-based compressed sensing (CS) tomography of H2O vapor absorption spectroscopy. A controlled laboratory setup is used to generate a constant two-dimensional temperature distribution in air (a roughly Gaussian temperature profile with a central temperature of 677 K). A wavelength-tunable laser beam is directed through the known distribution; the beam is translated and rotated using motorized stages to acquire complete absorption spectra in the 1330-1365 nm range at each of 64 beam locations and 60 view angles. Temperature reconstructions are compared to independent thermocouple measurements. Although the distribution studied is approximately axisymmetric, axisymmetry is not assumed and simulations show similar performance for arbitrary temperature distributions. We study the measurement error as a function of number of beams and view angles used in reconstruction to gauge the potential for application of CS in practical test articles where optical access is limited. (C) 2015 Optical Society of America
C1 [An, Xinliang; Brittelle, Mack S.; Sanders, Scott T.] Univ Wisconsin, Dept Mech Engn, Engine Res Ctr, Madison, WI 53706 USA.
[Lauzier, Pascal T.; Chen, Guang-Hong] Univ Wisconsin, Dept Med Phys, Madison, WI 53705 USA.
[Gord, James R.] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Roy, Sukesh] Spectral Energies LLC, Dayton, OH 45431 USA.
RP Brittelle, MS (reprint author), Univ Wisconsin, Dept Mech Engn, Engine Res Ctr, 1500 Engn Dr, Madison, WI 53706 USA.
EM brittelle@wisc.edu
FU Air Force Research Laboratory [FA8650-10-C-2103]
FX Air Force Research Laboratory (FA8650-10-C-2103).
NR 53
TC 1
Z9 1
U1 3
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD NOV 1
PY 2015
VL 54
IS 31
BP 9190
EP 9199
DI 10.1364/AO.54.009190
PG 10
WC Optics
SC Optics
GA CV7LY
UT WOS:000364455800054
PM 26560573
ER
PT J
AU Grabinski, C
AF Grabinski, Christin
TI Toxicology 101
SO CHEMICAL ENGINEERING PROGRESS
LA English
DT Article
ID IN-VITRO; PARTICLES; DOSIMETRY; TOXICITY; DISEASE
C1 [Grabinski, Christin] US Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Grabinski, C (reprint author), US Air Force Res Lab, Wright Patterson AFB, OH USA.
EM christin.grabinski.i.ctr@us.af.mil
NR 19
TC 0
Z9 0
U1 1
U2 1
PU AMER INST CHEMICAL ENGINEERS
PI NEW YORK
PA 3 PARK AVE, NEW YORK, NY 10016-5901 USA
SN 0360-7275
EI 1945-0710
J9 CHEM ENG PROG
JI Chem. Eng. Prog.
PD NOV
PY 2015
VL 111
IS 11
BP 31
EP 36
PG 6
WC Engineering, Chemical
SC Engineering
GA CV9QR
UT WOS:000364622200014
ER
PT J
AU Poggie, J
Leger, T
AF Poggie, J.
Leger, T.
TI Large-scale unsteadiness in a compressible, turbulent reattaching shear
layer
SO EXPERIMENTS IN FLUIDS
LA English
DT Article
ID WALL-PRESSURE FLUCTUATIONS; FINITE-DIFFERENCE SCHEMES;
RAYLEIGH-SCATTERING; SHOCK UNSTEADINESS; FLOW; RESOLUTION
AB The large-scale unsteadiness that occurs in shockwave/boundary layer interactions imposes severe aero-thermoacoustic loads on high-speed aircraft. Much progress has been made on this problem in the last two decades: these interactions can now be tackled with large eddy simulation, at least for relatively low Reynolds numbers. Further, a large body of evidence now suggests that the physical mechanism for the unsteadiness lies in the selective amplification, within the separated flow, of large-scale disturbances originating in the incoming turbulent flow. The present paper examines the kinematics of these incoming structures in a turbulent boundary layer, and the scaling of the corresponding response of a reattaching shear layer flow. In particular, it presents an overview of the influence on recent research of experimental work carried out by Smits' group at Princeton University in the 1990s.
C1 [Poggie, J.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Leger, T.] Ohio Aerosp Inst, Wright Patterson AFB, OH USA.
RP Poggie, J (reprint author), Purdue Univ, Sch Aeronaut & Astronaut, 701 W Stadium Ave, W Lafayette, IN 47907 USA.
EM jpoggie@purdue.edu
FU Air Force Research Laboratory Aerospace Systems Directorate; Air Force
Office of Scientific Research; National Aeronautics and Space
Administration Langley Research Center; National Science Foundation
FX Our recent computational work has been sponsored by the Air Force
Research Laboratory Aerospace Systems Directorate and by the Air Force
Office of Scientific Research. It was also supported by grants of High
Performance Computing time from the Department of Defense Supercomputing
Resource Centers at the Air Force Research Laboratory, the Army Research
Laboratory, and the Army Engineer Research and Development Center,
provided under a Department of Defense, High-Performance Computation
Modernization Program Frontier Project. The experimental work of Poggie
and Smits in the 1990s was sponsored by the Air Force Office of
Scientific Research, the National Aeronautics and Space Administration
Langley Research Center, and the National Science Foundation.
NR 46
TC 0
Z9 0
U1 4
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
EI 1432-1114
J9 EXP FLUIDS
JI Exp. Fluids
PD NOV
PY 2015
VL 56
IS 11
AR 205
DI 10.1007/s00348-015-2064-x
PG 12
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA CV8FV
UT WOS:000364517400001
ER
PT J
AU Doman, DB
AF Doman, David B.
TI Optimal Cruise Altitude for Aircraft Thermal Management
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID SYSTEMS
AB Mission-planning algorithms and trajectory optimization methods for aircraft that use fuel as a heat sink must ensure that fuel temperature limits are not violated at any point in a flight. The problem of determining the cruise altitude that minimizes final fuel tank temperature for jet aircraft that use recirculating fuel to remove waste thermal energy from the aircraft is considered. A heat exchanger transfers energy from the aircraft subsystems to the fuel. A portion of the fuel is burned in a turbojet engine, whereas the remaining unburned fuel is passed through a cooler that transfers some heat from the fuel to the atmosphere. A differential equation that describes the time rate of change of fuel tank temperature is derived based on the principles of conservation of mass and energy. Specific conditions are derived for the cruise altitude that minimizes final tank temperature for flight conditions associated with maximum endurance and range. Expressions are also derived that provide estimates of time and range to a temperature limit. Numerical examples are provided to illustrate the utility of the conditions and to assess the impact of the assumptions made in the derivation of the analytic models. The conditions also provide a relationship between aircraft performance parameters, the standard atmosphere, and the heat transfer characteristics of the fuel recirculation loop.
C1 US Air Force Res Lab, Power & Control Div, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Doman, DB (reprint author), US Air Force Res Lab, Power & Control Div, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
NR 7
TC 0
Z9 0
U1 3
U2 4
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD NOV
PY 2015
VL 38
IS 11
BP 2084
EP 2095
DI 10.2514/1.G000845
PG 12
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CV5RM
UT WOS:000364328800003
ER
PT J
AU VanderMey, JT
Doman, DB
Gerlach, AR
AF VanderMey, Josiah T.
Doman, David B.
Gerlach, Adam R.
TI Release Point Determination and Dispersion Reduction for Ballistic
Airdrops
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
C1 [VanderMey, Josiah T.; Doman, David B.] US Air Force Res Lab, Aerosp Syst Directorate, Power & Control Div, Autonomous Control Branch, Wright Patterson AFB, OH 45433 USA.
[Gerlach, Adam R.] Universal Technol Corp, Beavercreek, OH 45432 USA.
RP VanderMey, JT (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Power & Control Div, Autonomous Control Branch, 2210 Eighth St,Room 300, Wright Patterson AFB, OH 45433 USA.
EM josiah.vandermey@gmail.com; david.doman@us.af.mil;
adam.gerlach.ctr@us.af.mil
NR 31
TC 2
Z9 2
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD NOV
PY 2015
VL 38
IS 11
BP 2227
EP 2234
DI 10.2514/1.G001157
PG 8
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CV5RM
UT WOS:000364328800017
ER
PT J
AU Moss, DA
Crawford, P
AF Moss, David A.
Crawford, Paul
TI Ear Acupuncture for Acute Sore Throat: A Randomized Controlled Trial
SO JOURNAL OF THE AMERICAN BOARD OF FAMILY MEDICINE
LA English
DT Article
DE Acupuncture; Alternative Medicine; Clinical Trials; Randomized; NSAIDs;
Pain Management; Sore Throat
ID NONSTEROIDAL ANTIINFLAMMATORY DRUGS; AURICULAR ACUPUNCTURE; BACK-PAIN;
RELIEF
AB Background: Sore throat is a common cause of pain in outpatient encounters. Battlefield auricular acupuncture (the placing of needles in specific points in the ear) is a modality used to treat acute pain associated with a variety of ailments. The aim of our study was to determine whether auricular acupuncture reduces pain, medication usage, and missed work hours when added to standard therapy in adult patients with acute sore throat.
Methods: We conducted an unblinded, pragmatic, randomized controlled trial among adult, nonpregnant patients presenting to an Air Force family medicine clinic with pain from acute sore throat. A total of 54 patients were followed for 48 hours after treatment.
Results: Patients receiving auricular acupuncture reported lower pain scores than those who did not at 15 minutes (6.0 [95% confidence interval (CI), 5.4-6.6] vs 2.6 [95% CI, 1.7-3.5]; P < .0001), 6 hours (4.8 [95% CI, 4.0-5.6] vs 2.5 [95% CI, 1.6-3.4]; P = .0005), and 24 hours (4.1 [95% CI, 3.3-4.9] vs 1.3 [95% CI, 1.0-2.8]; P = .0006). They also reported taking fewer cumulative doses of pain medication at 6 hours (1.07 [95% CI, 0.69-1.45] vs 0.39 [95% CI, 0.2-0.58]; P = .003), 24 hours (2.63 [95% CI, 1.95-3.31] vs 1.37 [95% CI, 0.92-1.82]; P = .004), and 48 hours (4.07 [95% CI, 2.9-5.24] vs 2.19 [95% CI, 1.44-2.94]; P = .009). There was no difference in time missed from work between the auricular acupuncture and standard therapy groups.
Conclusions: Compared with usual treatment, battlefield auricular acupuncture was associated with reduced sore throat pain for 24 hours and decreased use of pain medication for up to 48 hours. There was no apparent effect on hours missed from work.
C1 [Moss, David A.; Crawford, Paul] US Air Force, North Las Vegas, NV USA.
RP Moss, DA (reprint author), 4700 North Las Vegas Blvd, Nafb, NV 89191 USA.
EM david.moss.3@us.af.mil
FU Air Force Medical Support Agency's Research and Development Division
(AFMSA/SGRS)
FX DAM and PC received a grant from the Air Force Medical Support Agency's
Research and Development Division (AFMSA/SGRS) during the conduct of the
study.
NR 31
TC 2
Z9 2
U1 1
U2 5
PU AMER BOARD FAMILY MEDICINE
PI LEXINGTON
PA 2228 YOUNG DR, LEXINGTON, KY 40505 USA
SN 1557-2625
EI 1558-7118
J9 J AM BOARD FAM MED
JI J. Am. Board Fam. Med.
PD NOV-DEC
PY 2015
VL 28
IS 6
BP 697
EP 705
DI 10.3122/jabfm.2015.06.150014
PG 9
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CW3CK
UT WOS:000364869400004
PM 26546644
ER
PT J
AU Crawford, P
Wiltz, S
AF Crawford, Paul
Wiltz, Scott
TI Participation in the Journey to Life Conversation Map Improves Control
of Hypertension, Diabetes, and Hypercholesterolemia
SO JOURNAL OF THE AMERICAN BOARD OF FAMILY MEDICINE
LA English
DT Article
DE Diabetes Mellitus; Education, Patient; Process Assessment (Health Care);
Self Care
ID SELF-MANAGEMENT EDUCATION; TYPE-2; CARE
AB Background: The Diabetes Conversation Map program includes 4 "board game-like" education tools. We describe how the Journey to Life Conversation Map Education Class improves diabetes performance measures of hemoglobin A(1c) (HbA(1c)), low-density lipoprotein (LDL), and blood pressure (BP).
Methods: Retrospective case-control study in a military family medicine clinic from January 2007 to January 2010. We included 202 patients who completed >= 1 conversation map class and a comparison group of 209 patients who did not attend.
Results: Attendees started with HbA(1c) 8.25 (95% confidence interval [CI], 7.86-8.64) and decreased to 6.96 (95% CI, 6.69-7.23). Patients in the comparison group started at 8.57 (95% CI, 8.18-8.95) and decreased to 8.27 (95% CI, 8.01-8.54) (P < .001). Attendees began with LDL of 111 mg/dL (95% CI, 103-119) and decreased to 94 mg/dL (95% CI, 81-106). Patients in the comparison group started at 89 mg/dL (95% CI, 81-98) and increased to 98 mg/dL (95% CI, 85-110) (P < .007). Systolic BP decreased 5.4 mmHg among attendees versus 0.8 mmHg among those in the comparison group (P = .014), whereas diastolic BP was unchanged (P = .110).
Conclusion: The Journey to Life Healthy Interactions Conversation Map Education Class for diabetes improves diabetes performance measures.
C1 [Crawford, Paul; Wiltz, Scott] Nellis Family Med Residency, Nellis AFB, NV 89191 USA.
RP Crawford, P (reprint author), Nellis Family Med Residency, 99MDOS SGOF,4700 Las Vegas Blvd N, Nellis AFB, NV 89191 USA.
EM paul.crawford@us.af.mil
FU AFMSA/SG9 Fuchsia Program
FX Partial funding for project provided by the AFMSA/SG9 Fuchsia Program.
NR 16
TC 3
Z9 3
U1 3
U2 4
PU AMER BOARD FAMILY MEDICINE
PI LEXINGTON
PA 2228 YOUNG DR, LEXINGTON, KY 40505 USA
SN 1557-2625
EI 1558-7118
J9 J AM BOARD FAM MED
JI J. Am. Board Fam. Med.
PD NOV-DEC
PY 2015
VL 28
IS 6
BP 767
EP 771
DI 10.3122/jabfm.2015.06.140142
PG 5
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CW3CK
UT WOS:000364869400012
PM 26546652
ER
PT J
AU Martin, SE
Drake, E
Yoder, L
Gibson, M
Litke, CA
AF Martin, Sarah E.
Drake, Emily
Yoder, Laura
Gibson, Mary
Litke, Carrie Ann
TI Active Duty Women's Perceptions of Breast-Feeding Support in the
Military Setting
SO MILITARY MEDICINE
LA English
DT Article
ID WORKPLACE
AB Background: The purpose of this study is to evaluate the current perceptions of breast-feeding support for active duty women serving in the U.S. Armed Forces. Methods: An online survey based on the Workplace Breastfeeding Support Scale (WBSS) was used to collect data from active duty military mothers. Data were collected and analyzed using SPSS software to evaluate active duty women's perceptions of breast-feeding support in the military. Results: 318 active duty women participated in the online survey. The average WBSS scores for active duty women was 50.20 (SD = 15.75). Comparing WBSS scores and branch of service, women in the Army had significantly lower WBSS scores (M = 45.85) then women in the Air Force (M = 53.96, p < 0.001). Enlisted women had significantly lower scores (M = 47.12) than officers (M = 54.62, p < 0.001). Also noted were significantly lower scores of active duty women who were Hispanic (M = 44.30) and women who had lower levels of education (M = 46.90, p = 0.006). Conclusions: The Department of Defense may be able to improve breast-feeding rates for all active duty mothers by implementing and adhering to lactation policies and focusing support efforts for enlisted women in all branches of service.
C1 [Martin, Sarah E.] US Air Force, Biloxi, MS 39531 USA.
[Drake, Emily; Gibson, Mary] Univ Virginia, Sch Nursing, Dept Family Commun & Mental Hlth Syst, Charlottesville, VA 22903 USA.
[Yoder, Laura] Eastern Mennonite Univ, Harrisonburg, VA 22801 USA.
[Litke, Carrie Ann] US Air Force, San Antonio, TX 78232 USA.
RP Martin, SE (reprint author), US Air Force, 728 Vandenberg Dr, Biloxi, MS 39531 USA.
NR 9
TC 0
Z9 0
U1 1
U2 2
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD NOV
PY 2015
VL 180
IS 11
BP 1154
EP 1160
DI 10.7205/MILMED-D-14-00498
PG 7
WC Medicine, General & Internal
SC General & Internal Medicine
GA CV9UT
UT WOS:000364633400013
PM 26540707
ER
PT J
AU Nelson, JM
McKinley, RA
McIntire, LK
Goodyear, C
Walters, C
AF Nelson, Justin M.
McKinley, R. Andy
McIntire, Lindsey K.
Goodyear, Chuck
Walters, Craig
TI Augmenting Visual Search Performance With Transcranial Direct Current
Stimulation (tDCS)
SO MILITARY PSYCHOLOGY
LA English
DT Article
DE frontal eye field (FEF); percent of eye closure (PERCLOS); sustained
attention; transcranial DC stimulation (tDCS); vigilance
ID DORSOLATERAL PREFRONTAL CORTEX; NONINVASIVE BRAIN-STIMULATION; VIGILANCE
DECREMENT; WORKING-MEMORY; WORKLOAD; TASK; WAKEFULNESS; OPERATORS;
CAFFEINE; TESTS
AB Military personnel endure rigorous and demanding man-hours designated to monitoring and locating targets in tasks such as cyber defense and Unmanned Aerial Vehicle (UAV) operators. These tasks are monotonous and repetitive, which can result in vigilance decrement. The objective of the study was to implement a form of noninvasive brain stimulation known as transcranial DC stimulation (tDCS) over the left frontal eye field (LFEF) region of the scalp to improve cognitive performance. The participants received anodal and cathodal stimulation of 2 mA for 30 min as well as placebo stimulation on 3 separate days while performing the task. The findings suggest that anodal and cathodal stimulation significantly improves detection accuracy. Also, a correlation was detected between percent of eye closure (PERCLOS) and blinking frequency in relation to stimulation condition. Our data suggest that tDCS over the LFEF would be a beneficial countermeasure to mitigate the vigilance decrement and improve visual search performance.
C1 [Nelson, Justin M.; McIntire, Lindsey K.; Goodyear, Chuck] Infoscitex Inc, Dayton, OH USA.
[McKinley, R. Andy] US Air Force Res Lab, Appl Neurosci Branch, Wright Patterson AFB, OH 45433 USA.
[Walters, Craig] MRI Intervent, Irvine, CA USA.
RP McKinley, RA (reprint author), US Air Force Res Lab, Appl Neurosci Branch, 711th HPW,2510 Fifth St,Bldg 840, Wright Patterson AFB, OH 45433 USA.
EM richard.mckinley.2@us.af.mil
NR 37
TC 4
Z9 4
U1 6
U2 11
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0899-5605
EI 1532-7876
J9 MIL PSYCHOL
JI Milit. Psychol.
PD NOV
PY 2015
VL 27
IS 6
BP 335
EP 347
DI 10.1037/mil0000085
PG 13
WC Psychology, Multidisciplinary
SC Psychology
GA CV9EU
UT WOS:000364591000002
ER
PT J
AU Roy, S
Hsu, PS
Jiang, N
Slipchenko, MN
Gord, JR
AF Roy, Sukesh
Hsu, Paul S.
Jiang, Naibo
Slipchenko, Mikhail N.
Gord, James R.
TI 100-kHz-rate gas-phase thermometry using 100-ps pulses from a burst-mode
laser
SO OPTICS LETTERS
LA English
DT Article
ID STOKES-RAMAN SCATTERING; CARS SPECTROSCOPY; 5 KHZ; PROBE; SYSTEM;
FLAMES; FLOWS
AB Temperature measurements based on gas-phase coherent anti-Stokes Raman scattering (CARS) spectroscopy are demonstrated in reacting flows at a rate of 100 kHz employing a burst-mode laser with a pulse duration of similar to 100 ps. The recently developed picosecond-duration, high-energy burst-mode laser is used to pump an optical parametric generator/optical parametric amplifier that produces broadband light centered at similar to 680 nm to provide the Stokes beams for excitation of the rovibrational Raman transitions of H-2. The 532-nm output of the picosecond burst-mode laser is then utilized as a pump beam for the CARS process that generates 100 single-shot spectra at a rate of 100 kHz during the 1-ms duration burst. Coherent spectroscopy-based temperature measurements at 100 kHz will significantly aid the understanding of transient and unsteady flow phenomena related to turbulent combustion, transonic and hypersonic flows, high-enthalpy flows, and the dynamics of energetic materials. (C) 2015 Optical Society of America
C1 [Roy, Sukesh; Hsu, Paul S.; Jiang, Naibo; Slipchenko, Mikhail N.] Spectral Energies LLC, Dayton, OH 45431 USA.
[Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Roy, S (reprint author), Spectral Energies LLC, Dayton, OH 45431 USA.
EM roy.sukesh@gmail.com
FU Air Force Research Laboratory (AFRL) [FA8650-15-D-2518,
FA8650-15-M-2620]
FX Air Force Research Laboratory (AFRL) (FA8650-15-D-2518,
FA8650-15-M-2620).
NR 24
TC 2
Z9 2
U1 4
U2 12
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD NOV 1
PY 2015
VL 40
IS 21
BP 5125
EP 5128
DI 10.1364/OL.40.005125
PG 4
WC Optics
SC Optics
GA CV7QH
UT WOS:000364468600077
PM 26512535
ER
PT J
AU Kuether, RJ
Deaner, BJ
Hollkamp, JJ
Allen, MS
AF Kuether, Robert J.
Deaner, Brandon J.
Hollkamp, Joseph J.
Allen, Matthew S.
TI Evaluation of Geometrically Nonlinear Reduced-Order Models with
Nonlinear Normal Modes
SO AIAA JOURNAL
LA English
DT Article
ID ROTATING FLEXIBLE STRUCTURES; RESPONSE PREDICTION; BASIS SELECTION;
DYNAMICS; VIBRATION
AB Several reduced-order modeling strategies have been developed to create low-order models of geometrically nonlinear structures from detailed finite element models, allowing one to compute the dynamic response of the structure at a dramatically reduced cost. However, the parameters of these reduced-order models are estimated by applying a series of static loads to the finite element model, and the quality of the reduced-order model can be highly sensitive to the amplitudes of the static load cases used and to the type/number of modes used in the basis. This paper proposes to combine reduced-order modeling and numerical continuation to estimate the nonlinear normal modes of geometrically nonlinear finite element models. Not only does this make it possible to compute the nonlinear normal modes far more quickly than existing approaches, but the nonlinear normal modes are also shown to be an excellent metric by which the quality of the reduced-order model can be assessed. Hence, the second contribution of this work is to demonstrate how nonlinear normal modes can be used as a metric by which nonlinear reduced-order models can be compared. Various reduced-order models with hardening nonlinearities are compared for two different structures to demonstrate these concepts: a clamped-clamped beam model, and a more complicated finite element model of an exhaust panel cover.
C1 [Kuether, Robert J.; Allen, Matthew S.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
[Deaner, Brandon J.] Mercury Marine, Fond Du Lac, WI 54936 USA.
[Hollkamp, Joseph J.] US Air Force Res Lab, AFRL RQHF, Struct Sci Ctr, Wright Patterson AFB, OH 45433 USA.
RP Kuether, RJ (reprint author), Univ Wisconsin, Dept Engn Phys, 534 Engn Res Bldg,1500 Engn Dr, Madison, WI 53706 USA.
EM rkuether@wisc.edu; Brandon.Deaner@mercmarine.com;
Joseph.Hollkamp@us.af.mil; msallen@engr.wisc.edu
FU U.S. Air Force Office of Scientific Research [FA9550-11-1-0035]
FX This work was supported by the U.S. Air Force Office of Scientific
Research, award number FA9550-11-1-0035, under the Multiscale Structural
Mechanics and Prognosis program managed by David Stargel. The authors
would like to thank Peter Penegor and David Nickel from Cummins
Emissions Solutions for providing the geometry of the exhaust cover
plate. The authors are also grateful to Stephen Rizzi and Lorraine
Guerin for the help they provided in implementing the enforced
displacement method and in choosing scale factors for that method.
NR 22
TC 5
Z9 5
U1 0
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD NOV
PY 2015
VL 53
IS 11
BP 3273
EP 3285
DI 10.2514/1.J053838
PG 13
WC Engineering, Aerospace
SC Engineering
GA CV4KE
UT WOS:000364234900010
ER
PT J
AU Fryslie, STM
Johnson, MT
Choquette, KD
AF Fryslie, Stewart T. M.
Johnson, Matthew T.
Choquette, Kent D.
TI Coherence Tuning in Optically Coupled Phased Vertical Cavity Laser
Arrays
SO IEEE JOURNAL OF QUANTUM ELECTRONICS
LA English
DT Article
DE Phased arrays; semiconductor laser arrays; vertical cavity surface
emitting lasers (VCSELs)
ID SURFACE-EMITTING LASERS; SEMICONDUCTOR-LASER; MODULATION
AB Vertical-cavity surface-emitting laser arrays can be designed to operate in a coherently coupled mode, however, high yield has been challenging in past efforts. We discuss microcavity laser arrays that are designed to be optically coupled but with independent bias current injection into each array element. We demonstrate that these arrays can be electronically tuned to coherently coupled operation and at bias conditions not previously realized. Control of injection bias conditions to individual array elements allows resonance tuning of each element with the result that the phase relation and coherence of the array can be engineered. This control enables increased output power in either in-phase or out-of-phase coherent operation from a single array, and ensures coherent operation from nearly all arrays. This ability to tune into coherence will enhance the performance of phased vertical cavity laser arrays as well as improve their fabrication yield.
C1 [Fryslie, Stewart T. M.; Choquette, Kent D.] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
[Johnson, Matthew T.] US Air Force, Colorado Springs, CO 80840 USA.
RP Fryslie, STM (reprint author), Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
EM fryslie2@illinois.edu; mtjohns2@illinois.edu; choquett@illinois.edu
FU Oracle Corporation, Redwood, CA, USA
FX This work was supported by Oracle Corporation, Redwood, CA, USA.
NR 23
TC 4
Z9 4
U1 3
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9197
EI 1558-1713
J9 IEEE J QUANTUM ELECT
JI IEEE J. Quantum Electron.
PD NOV
PY 2015
VL 51
IS 11
AR 2600206
DI 10.1109/JQE.2015.2481724
PG 6
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA CV1OJ
UT WOS:000364027400001
ER
PT J
AU Morton, PA
Mireles, J
Mendoza, H
Cordero, PM
Benedict, M
Wicker, RB
AF Morton, Philip A.
Mireles, Jorge
Mendoza, Heimdall
Cordero, Paola M.
Benedict, Mark
Wicker, Ryan B.
TI Enhancement of Low-Cycle Fatigue Performance From Tailored
Microstructures Enabled by Electron Beam Melting Additive Manufacturing
Technology
SO JOURNAL OF MECHANICAL DESIGN
LA English
DT Article
ID TITANIUM-ALLOYS; CRACK GROWTH; TI-6AL-4V
AB Electron beam melting (EBM) additive manufacturing (AM) technology has allowed the layerwise fabrication of parts from metal powder precursor materials that are selectively melted using an electron beam. An advantage of EBM technology over conventional manufacturing processes has been the capability to change processing variables (e.g., beam current, beam speed, and beam focus) throughout part fabrication, enabling the processing of a wide variety of materials. In this research, additional scans were implemented in an attempt to promote grain coarsening through the added thermal energy. It is hypothesized that the additional energy caused coarsening of Ti-6Al-4V microstructure that has been shown to increase mechanical properties of as-fabricated parts as well as improve surface characteristics (e.g., reduced porosity). Fatigue testing was performed on an L-bracket using a loading configuration designed to cause failure at the corner (i.e., intersection of the two members) of the bracket. Results showed 22% fatigue life improvement from L-brackets with as-fabricated conditions to L-brackets with a graded microstructure resulting from the selective addition of thermal energy in the expected failure region. Three L-brackets were fabricated and exposed to a triple melt cycle (compared to the standard single melt cycle) during fabrication, machined to specific dimensions, and tested. Results for fatigue performance were within similar to 1% of wrought L-brackets. The work from this research shows that new design procedures can be implemented for AM technologies that involve evaluation of stress concentration sites using finite element analysis and implementation of scanning strategies during fabrication that help improve performance by spatially adjusting thermal energy at potential failure sites or high stress regions.
C1 [Morton, Philip A.; Mireles, Jorge; Mendoza, Heimdall; Cordero, Paola M.; Wicker, Ryan B.] Univ Texas El Paso, Dept Mech Engn, WM Keck Ctr Innovat 3D, El Paso, TX 79968 USA.
[Benedict, Mark] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Mireles, J (reprint author), Univ Texas El Paso, Dept Mech Engn, WM Keck Ctr Innovat 3D, El Paso, TX 79968 USA.
OI Mireles, Jorge/0000-0002-7014-9957
FU State of Texas Emerging Technology Fund; Air Force Research Laboratory's
Materials and Manufacturing Directorate; Mr. and Mrs. MacIntosh
Murchison Chair I in Engineering Endowment
FX The research presented here was performed at The University of Texas at
El Paso (UTEP) within the W.M. Keck Center for 3D Innovation (Keck
Center), expanding recently to over 13,000 sq. ft. and providing access
to state-of-the-art facilities and equipment as a result of funding,
most recently, from the State of Texas Emerging Technology Fund. The
authors are grateful to Alejandro Hinojos, Diego Mejorado, and Christina
Pickett of the Keck Center for their assistance on various aspects of
the project. Support was provided, in part, by General Dynamics
Information Technology (GDIT) through a grant from the Air Force
Research Laboratory's Materials and Manufacturing Directorate as well as
the Mr. and Mrs. MacIntosh Murchison Chair I in Engineering Endowment.
Approved for Public Disclosure Case Number: 88ABW-2015-0419.
NR 6
TC 1
Z9 1
U1 6
U2 34
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1050-0472
J9 J MECH DESIGN
JI J. Mech. Des.
PD NOV
PY 2015
VL 137
IS 11
SI SI
AR 111412
DI 10.1115/1.4031057
PG 4
WC Engineering, Mechanical
SC Engineering
GA CU9LI
UT WOS:000363865600013
ER
PT J
AU Sulym, H
Andrusiv, L
Pasternak, Y
AF Sulym, H.
Andrusiv, L.
Pasternak, Y.
TI Interaction of thin inclusion with circular hole in the elastic
isotropic medium
SO ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
LA English
DT Article
DE Boundary element method; generalized stress intensity factors;
inclusion; J-integral; thin shape
ID CRACK
AB The purpose of this paper is to analyze the interaction of thin elastic inclusions with globular defects in a solid structural element and develop technique to determine fracture parameters when the elastic inclusion of the structure is close to a circular hole and/or to its bonding layers. Procedures for determination of fracture parameters are based on the J-integral relation with generalized stress intensity factors (GSIF) recently obtained by the authors and the boundary element method is adopted for studying thin shapes. The developed techniques, dominating GSIF and mutual integral method, are applied to two specific problems: the interaction of a traction-free hole with a nearby, thin inclusion and the interaction of a constrained hole with the inclusion.
The direct numerical solution was obtained for the two principal models which represent two different boundary conditions on the edge of the hole of the structural element. The study shows that if the hole is unstressed, the values of GSIF are approximately the same as the corresponding values of the fracture parameters and the presence of the hole and the rigid inclusion have only a small effect on GSIF. But if the hole is constrained along its boundary, the values of GSIF generally decrease with decreasing the distance between the inclusion and the hole. The stress concentration on the hole substantially depends on the presence of the inclusion and varies significantly with respect to its radius, the distance from the inclusion, and the relative rigidity of the inclusion. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Sulym, H.] Bialystok Tech Univ, PL-15351 Bialystok, Poland.
[Andrusiv, L.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Pasternak, Y.] Lutsk Natl Tech Univ, UA-43018 Lutsk, Ukraine.
RP Andrusiv, L (reprint author), US Air Force Acad, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
EM lubov.andrusiv@usafa.edu
RI Pasternak, Iaroslav/K-4987-2016
OI Pasternak, Iaroslav/0000-0002-1732-0719
NR 17
TC 0
Z9 0
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0044-2267
EI 1521-4001
J9 ZAMM-Z ANGEW MATH ME
JI ZAMM-Z. Angew. Math. Mech.
PD NOV
PY 2015
VL 95
IS 11
BP 1282
EP 1289
DI 10.1002/zamm.201300157
PG 8
WC Mathematics, Applied; Mechanics
SC Mathematics; Mechanics
GA CU9SL
UT WOS:000363885300014
ER
PT J
AU Powell, MR
Hurley, LD
Richardson, TC
AF Powell, Marion R.
Hurley, Leo D.
Richardson, Tighe C.
TI An Unusual Complication of Barotrauma at Altitude
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Article
DE optic neuropathy; optic nerve; color vision; barotrauma; altitude
ID OPTIC NEUROPATHY; SINUS BAROTRAUMA
AB BACKGROUND: A case of unilateral optic neuropathy secondary to barotrauma following a medial orbital wall fracture is presented.
CASE REPORT: A 41-yr-old U.S. Air Force aviator presented for a routine periodic health assessment. Evaluation uncovered a suspected acquired color deficiency in the right eye (OD). Subsequent discussions with the patient revealed a history of eye pain, redness, and proptosis during a flight overseas several years earlier. Local ocular examination demonstrated asymmetric optic nerve cupping, optic nerve pallor OD, a mild asymmetric color deficit, and a significant visual field defect OD. Evaluation with magnetic resonance imaging revealed findings consistent with an old medial orbital wall fracture OD and optic nerve findings consistent with optic neuropathy. Follow-up evaluation by neurology and otorhinolaryngology demonstrated only extensive sinus pathology. Based upon these findings, it is postulated that the member suffered a medial orbital wall fracture at altitude during ascent caused by expanding ethmoid sinus gases due to abnormal sinus anatomy with subsequent right optic nerve injury leading to an optic neuropathy and subsequent visual sequelae.
DISCUSSION: This case demonstrates one possible complication of active sinus disease while working in the aerospace environment. Several case reports have been published demonstrating the potential link between eye injuries and working in an environment with fluctuating atmospheric pressure. However, literature addressing the specific in-flight environment causing such complications is lacking. Furthermore, the case supports the need for versatility and a broad knowledge base in practicing flight surgeons to evaluate ocular pathology.
C1 San Antonio Uniformed Serv Hlth Educ Consortium, Ophthalmol Residency, Joint Base San Antonio, TX USA.
US Air Force Sch Aerosp Med, Aeromed Consultat Serv, Ophthalmol Branch, Wright Patterson AFB, OH USA.
RP Powell, MR (reprint author), 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
EM fincobbler@hotmail.com
NR 8
TC 1
Z9 1
U1 1
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD NOV
PY 2015
VL 86
IS 11
BP 994
EP 998
DI 10.3357/AMHP.4359.2015
PG 5
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA CU2OA
UT WOS:000363361600010
PM 26564766
ER
PT J
AU Latorre-Carmona, P
Javidi, B
LeMaster, DA
AF Latorre-Carmona, Pedro
Javidi, Bahram
LeMaster, Daniel A.
TI Three-Dimensional Visualization of Long Range Scenes by Photon Counting
Mid-Wave Infrared Integral Imaging
SO JOURNAL OF DISPLAY TECHNOLOGY
LA English
DT Article
DE Computational integral imaging (CII); infrared imaging; passive 3D
imaging; photon counting
ID OBJECT RECOGNITION; SYSTEM
AB Integral imaging under photon counting conditions has found different three-dimensional (3D) imaging applications, including 3D image reconstruction and recognition. In this paper, we present the application of the maximum-likelihood (ML) estimation method for visualization of 3D scenes in photon starved environments using mid-wave infrared 3D data of real scenes acquired at distances ranging from 50 m to more than 2 km. To the best of our knowledge, this is the first report on mid-wave infrared 3D photon counting integral imaging of distant scenes.
C1 [Latorre-Carmona, Pedro] Univ Jaume 1, Inst New Imaging Technol, Castellon La Plana 12071, Spain.
[Javidi, Bahram] Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
[LeMaster, Daniel A.] AFRL RYMT, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Latorre-Carmona, P (reprint author), Univ Jaume 1, Inst New Imaging Technol, Castellon La Plana 12071, Spain.
EM latorre@uji.es; Bahram.Javidi@UConn.edu; daniel.lemaster@wpafb.af.mil
FU Universitat Jaume I [E-2014-04]
FX Manuscript received August 29, 2014; revised November 12, 2014; accepted
December 16, 2014. Date of publication December 19, 2014; date of
current version October 16, 2015. The work of P. Latorre-Carmona was
supported by Universitat Jaume I under Grant E-2014-04.
NR 20
TC 0
Z9 0
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1551-319X
EI 1558-9323
J9 J DISP TECHNOL
JI J. Disp. Technol.
PD NOV
PY 2015
VL 11
IS 11
BP 908
EP 912
DI 10.1109/JDT.2014.2384478
PG 5
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA CT9SH
UT WOS:000363156400005
ER
PT J
AU McIntire, JP
Wright, ST
Harrington, LK
Havig, PR
Watamaniuk, SNJ
Heft, EL
AF McIntire, John P.
Wright, Steve T.
Harrington, Lawrence K.
Havig, Paul R.
Watamaniuk, Scott N. J.
Heft, Eric L.
TI Binocular Fusion Ranges and Stereoacuity Predict Positional and
Rotational Spatial Task Performance on a Stereoscopic 3D Display
SO JOURNAL OF DISPLAY TECHNOLOGY
LA English
DT Article
DE Binocular vision; depth perception; optometry; stereoscopic 3D (S3D);
stereopsis; virtual environment
ID VISUAL FATIGUE; 3-D DISPLAYS; DISCOMFORT
AB In this work, we tested 12 participants on a virtual object precision placement task while viewing a stereoscopic 3D (S3D) display. Optometric measures of binocular function were obtained, including measurements of distant and near phorias (horizontal and vertical) and distant and near horizontal fusion ranges, using standard clinical techniques. Before each of six 30-min experimental sessions, measurements of phoria and fusion ranges were repeated. All participants completed experimental sessions in which the task required precise positional and rotational alignment of a virtual object in depth, at the same location and orientation as a stationary target object. The object was controlled by participants' spatial manipulation of a wireless 6 degree-of-freedom (DOF) tangible user interface utilizing magnetic spatial tracking. Subjective discomfort was assessed using the Simulator Sickness Questionnaire (SSQ). Individual placement precision in S3D trials was significantly correlated with several of the binocular measures: viewers with larger convergent fusion ranges, larger divergent fusion ranges, larger total fusion ranges, or lower (better) stereoscopic acuity thresholds were more accurate at the task. None of the optometric measures were predictive of individual subjective discomfort, although a combined analysis with a similar previous experiment suggested that a personal history with motion sickness was related to discomfort levels from S3D viewing. The results confirm and extend previous research, suggesting that several key optometric measurements are predictive of complex manual spatial task performance on an S3D display system.
C1 [McIntire, John P.; Havig, Paul R.; Heft, Eric L.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Wright, Steve T.] US Air Force, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
[Harrington, Lawrence K.] Ball Aerosp & Technol Corp, Dayton, OH 45433 USA.
[Watamaniuk, Scott N. J.] Wright State Univ, Dept Psychol, Dayton, OH 45435 USA.
RP McIntire, JP (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM john.mcin-tire.1@us.af.mil
NR 25
TC 0
Z9 0
U1 4
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1551-319X
EI 1558-9323
J9 J DISP TECHNOL
JI J. Disp. Technol.
PD NOV
PY 2015
VL 11
IS 11
BP 959
EP 966
DI 10.1109/JDT.2014.2367161
PG 8
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA CT9SH
UT WOS:000363156400012
ER
PT J
AU White, TJ
Broer, DJ
AF White, Timothy J.
Broer, Dirk J.
TI Programmable and adaptive mechanics with liquid crystal polymer networks
and elastomers
SO NATURE MATERIALS
LA English
DT Review
ID IN-SITU PHOTOPOLYMERIZATION; NEMATIC ELASTOMERS; SHAPE-MEMORY;
ARTIFICIAL MUSCLES; CARBON NANOTUBES; CROSS-LINKING; PHOTOMECHANICAL
RESPONSE; MESOGENIC DIACRYLATE; THERMAL-EXPANSION; LIGHT
AB Liquid crystals are the basis of a pervasive technology of the modern era. Yet, as the display market becomes commoditized, researchers in industry, government and academia are increasingly examining liquid crystalline materials in a variety of polymeric forms and discovering their fascinating and useful properties. In this Review, we detail the historical development of liquid crystalline polymeric materials, with emphasis on the thermally and photogenerated macroscale mechanical responses - such as bending, twisting and buckling - and on local-feature development (primarily related to topographical control). Within this framework, we elucidate the benefits of liquid crystallinity and contrast them with other stimuli-induced mechanical responses reported for other materials. We end with an outlook of existing challenges and near-term application opportunities.
C1 [White, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Broer, Dirk J.] Eindhoven Univ Technol, Inst Complex Mol Syst, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands.
RP White, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.white.24@us.af.mil; d.broer@tue.nl
FU Air Force Office of Scientific Research and of the Materials and
Manufacturing Directorate of the Air Force Research Laboratory
FX T.J.W. acknowledges the support of the Air Force Office of Scientific
Research and of the Materials and Manufacturing Directorate of the Air
Force Research Laboratory.
NR 150
TC 63
Z9 63
U1 104
U2 302
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
EI 1476-4660
J9 NAT MATER
JI Nat. Mater.
PD NOV
PY 2015
VL 14
IS 11
BP 1087
EP 1098
DI 10.1038/NMAT4433
PG 12
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA CU4BU
UT WOS:000363471900015
PM 26490216
ER
PT J
AU Guerrero, M
AF Guerrero, Michael
TI AN INTELLIGENCE DOWNGRADE
SO FOREIGN AFFAIRS
LA English
DT Letter
C1 US Air Force, Washington, DC 20330 USA.
RP Guerrero, M (reprint author), US Air Force, Washington, DC 20330 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU COUNCIL FOREIGN RELAT IONS INC
PI NEW YORK
PA HAROLD PRATT HOUSE, 58 E 68TH ST, NEW YORK, NY 10065 USA
SN 0015-7120
J9 FOREIGN AFF
JI Foreign Aff.
PD NOV-DEC
PY 2015
VL 94
IS 6
BP 180
EP 181
PG 2
WC International Relations
SC International Relations
GA CT6KR
UT WOS:000362922400080
ER
PT J
AU Senia, ES
Sarao, MS
AF Senia, E. S.
Sarao, M. S.
TI Periapical cemento-osseous dysplasia: a case report with twelve-year
follow-up and review of literature
SO INTERNATIONAL ENDODONTIC JOURNAL
LA English
DT Article
DE benign fibro-osseous lesions; cementoma; periapical cemental dysplasia;
periapical cemento-osseous dysplasia; periradicular cemental dysplasia;
periradicular osteofibrosis
ID BENIGN FIBROOSSEOUS LESIONS; SIMPLE BONE-CYST; SCLEROSING OSTEOMYELITIS;
DIFFERENTIAL-DIAGNOSIS; GIGANTIFORM CEMENTOMA; JAWS; FEATURES; WOMEN
AB AimTo present a case report describing the long-term behaviour of periapical cemento-osseous dysplasia by observing the radiographic changes that took place over a period of 12years. A review of the pertinent literature is also presented.
SummaryA healthy 26-year-old white female was referred to the Wilford Hall USAF Medical Center Endodontic Department for evaluation of an asymptomatic radiolucency at the apex of the right mandibular lateral incisor. Following a clinical evaluation that included pulp testing, a diagnosis of periapical cemento-osseous dysplasia (PCOD) was made. No treatment was rendered but follow-up visits were recommended. The patient was subsequently re-evaluated 8 times over a period of 12years. During that time the lesion changed in appearance, displaying the various phases of PCOD. At the same time, lesions affecting the three adjoining incisors appeared and behaved in a similar manner. At the 12-year recall, the right lateral and both central incisors revealed no evidence of PCOD and an almost normal trabecular pattern of bone could be seen. Misdiagnosis and unnecessary treatment of PCOD may be avoided with careful pulp testing and knowledge of its most common locations of occurrence, radiographic appearances (phases) and benign behaviour.
C1 [Senia, E. S.] Wilford Hall USAF Med Ctr, Dept Endodont, San Antonio, TX USA.
[Sarao, M. S.] Univ Colorado, Sch Dent Med, Div Endodont, Dept Surg Dent, Aurora, CO USA.
RP Sarao, MS (reprint author), Univ Colorado, Sch Dent Med, Dept Surg Dent, Div Endodont, 13065 E 17th Ave,Room 104E, Aurora, CO 80045 USA.
EM saraok2002@yahoo.com
NR 59
TC 1
Z9 1
U1 1
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0143-2885
EI 1365-2591
J9 INT ENDOD J
JI Int. Endod. J.
PD NOV
PY 2015
VL 48
IS 11
BP 1086
EP 1099
DI 10.1111/iej.12417
PG 14
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA CT0SW
UT WOS:000362508000009
PM 25425097
ER
PT J
AU Abuin, M
Turgut, Z
Aronhime, N
Keylin, V
Leary, A
Degeorge, V
Horwath, J
Semiatin, SL
Laughlin, DE
McHenry, ME
AF Abuin, Manuel
Turgut, Zafer
Aronhime, Natan
Keylin, Vladimir
Leary, Alex
Degeorge, Vincent
Horwath, John
Semiatin, S. Lee
Laughlin, David E.
McHenry, Michael E.
TI Determination of Pressure Effects on the alpha -> gamma Phase Transition
and Size of Fe in Nd-Fe-B Spring Exchange Magnets
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 4th International Conference on Advances in Solidification Processes
ICASP)
CY JUL 08-11, 2014
CL BCAST, Old Windsor, ENGLAND
SP EPSRC Ctr LiME, LiME, IOM3, MICRESS
HO BCAST
ID EQUATION-OF-STATE; CRYSTAL-STRUCTURE; GRAIN-GROWTH; IRON; STABILITY;
ND2FE14B; ALLOYS; POINT
AB Pressure effects in RE-lean Nd2Fe14B-based nanocomposite systems developed from nanocrystalline precursors are studied in this work. In particular, the pressure dependence of the alpha -> gamma phase transformation in the Fe phase is examined along with the suppression of coarsening (growth) in both phases at higher pressures. By synchrotron X-ray diffraction we determined that the alpha -> gamma-phase transformations occur at temperatures of 1120 K (847 A degrees C) at 1 GPa and 960 K (687 A degrees C) at 5 GPa. A composition rich in Fe appears to have an similar to 373 K (100 A degrees C) range of temperature over which the alpha, gamma-phases coexist for atmospheric pressure. We compare our experimental data with other reported observations for Fe and with equations of state (EOS) determined from first principle calculations. From this study we observe an important feature: the phase transition begins at a higher temperature in flake samples than in powder samples. We consider the magnetic contribution to the heat capacity in the EOS for Fe and describe the implications of dipole moments on the slope of the Clapeyron equation for the P-T phase diagram in Fe. Additionally, the phase transition occurs at temperatures where growth by diffusional coarsening is also operative. This is significant since the size of soft Fe nanostructures is important to spring exchange. Suppression of the phase transition and Fe coarsening at higher pressures suggest that there may be interesting mechanical processing routes to be investigated to optimize spring exchange effects in Nd-Fe-B permanent magnets. (C) The Minerals, Metals & Materials Society and ASM International 2015
C1 [Abuin, Manuel; Aronhime, Natan; Keylin, Vladimir; Leary, Alex; Degeorge, Vincent; Laughlin, David E.; McHenry, Michael E.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15221 USA.
[Abuin, Manuel] UCM UPM, Madrid 28040, Spain.
[Turgut, Zafer; Horwath, John; Semiatin, S. Lee] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
EM naronhim@andrew.cmu.edu
RI SEMIATIN, SHELDON/E-7264-2017
FU Wright Patterson Air Force [FA8650-12-D-2225]; AFOSR
FX All authors would like to acknowledge Argonne Nation Laboratory for beam
time. M.A. would like to acknowledge the PICATA fellowship. M.E.M, V.K.,
V.D., N.A., and A.L. acknowledge support from the Wright Patterson Air
Force (Contract Number: FA8650-12-D-2225). Z.T, J.C.H and S.L.S
acknowledge support from the AFOSR.
NR 48
TC 0
Z9 0
U1 5
U2 28
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD NOV
PY 2015
VL 46A
IS 11
BP 5002
EP 5010
DI 10.1007/s11661-015-3120-0
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CS8NG
UT WOS:000362344100020
ER
PT J
AU Zemla, JC
Tossell, CC
Kortum, P
Byrne, MD
AF Zemla, Jeffrey C.
Tossell, Chad C.
Kortum, Philip
Byrne, Michael D.
TI A Bayesian approach to predicting website revisitation on mobile phones
SO INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES
LA English
DT Article
DE World wide web; Mobile phones; Computational modeling
ID WORLD-WIDE-WEB; INTEGRATED THEORY; ENVIRONMENT; SYSTEMS; CONTEXT;
MEMORY; MODEL
AB Mobile web browsing is highly recurrent, in that a large proportion of user's page requests are to a small set of websites. Despite this, most mobile browsers do not provide an efficient means for revisiting sites. Although significant research exists on prediction in the personal computer realm, little work has been done in the mobile realm where physical constraints of the device and mobile browsing behaviors are vastly different. The current research proposes a Bayesian model approach, based on a cognitive model of memory retrieval that integrates multiple cues in order to predict the next site a user will visit. These cues include frequency of site visitation, the recency of site visitation, and the context in which specific sites are accessed. The model is assessed using previously collected web logs from 24 iPhone users over the course of one year. Our model outperforms simpler models based on frequency or recency, which are sometimes implemented in desktop browsers. Potential applications of the model are discussed with the objective of increasing browsing efficiency on mobile devices. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Zemla, Jeffrey C.] Brown Univ, Dept Cognit Linguist & Psychol Sci, Providence, RI 02912 USA.
[Tossell, Chad C.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Kortum, Philip; Byrne, Michael D.] Rice Univ, Dept Psychol, Houston, TX 77251 USA.
[Byrne, Michael D.] Rice Univ, Dept Comp Sci, Houston, TX USA.
RP Zemla, JC (reprint author), Brown Univ, Dept Cognit Linguist & Psychol Sci, Providence, RI 02912 USA.
EM jzemla@brown.edu
FU National Science Foundation [NSF IIS/HCC 0803556]
FX This work was supported in part by a National Science Foundation grant
NSF IIS/HCC 0803556. The authors would also like to thank three
anonymous reviewers for critical feedback that greatly improved the
manuscript.
NR 52
TC 0
Z9 0
U1 2
U2 10
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 1071-5819
EI 1095-9300
J9 INT J HUM-COMPUT ST
JI Int. J. Hum.-Comput. Stud.
PD NOV
PY 2015
VL 83
BP 43
EP 50
DI 10.1016/j.ijhcs.2015.06.002
PG 8
WC Computer Science, Cybernetics; Ergonomics; Psychology, Multidisciplinary
SC Computer Science; Engineering; Psychology
GA CR8DY
UT WOS:000361582500004
ER
PT J
AU Zhdanov, BV
Rotondaro, MD
Shaffer, MK
Knize, RJ
AF Zhdanov, B. V.
Rotondaro, M. D.
Shaffer, M. K.
Knize, R. J.
TI Potassium Diode Pumped Alkali Laser demonstration using a closed cycle
flowing system
SO OPTICS COMMUNICATIONS
LA English
DT Article
DE Alkali lasers; DPAL; Potassium laser; Thermal effects
ID VAPOR LASER; MODEL
AB The first Potassium Diode Pumped Alkali Laser (DPAL) with flowing gain medium in closed cycle system has been demonstrated. A slope efficiency of 31% for continuous wave operation was achieved with a maximum output power 5 W. The flow loop was operated with a helium buffer gas pressure of 800 Torr and an alkali metal temperature of 185 degrees C. An examination of laser performance vs flow speed demonstrated higher efficiencies with increasing flow speeds. (C) 2015 Elsevier B.V. All rights reserved,
C1 [Zhdanov, B. V.; Rotondaro, M. D.; Shaffer, M. K.; Knize, R. J.] US Air Force Acad, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
FU High Energy Lasers Joint Technology Office (HEL JTO)
FX We acknowledge support of the High Energy Lasers Joint Technology Office
(HEL JTO) who funded this research project,
NR 11
TC 5
Z9 5
U1 2
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0030-4018
EI 1873-0310
J9 OPT COMMUN
JI Opt. Commun.
PD NOV 1
PY 2015
VL 354
BP 256
EP 258
DI 10.1016/j.optcom.2015.06.010
PG 3
WC Optics
SC Optics
GA CQ9BD
UT WOS:000360904800042
ER
PT J
AU Hu, D
Liu, Q
Tisdale, J
Nam, H
Park, SY
Wang, H
Urbas, A
Hu, B
AF Hu, Dehua
Liu, Qing
Tisdale, Jeremy
Nam, Haerim
Park, Soo Young
Wang, Hsin
Urbas, Augustine
Hu, Bin
TI Optically tunable Seebeck effect from intramolecular proton-transfer
materials in organic vertical thin-film thermoelectric device
SO ORGANIC ELECTRONICS
LA English
DT Article
DE Seebeck effect; Proton-transfer; Electron-phonon coupling; Organic
semiconductors
ID DENSITY-OF-STATES; ELECTRICAL-CONDUCTIVITY; SURFACE POLARIZATION;
COEFFICIENT; EFFICIENCY; POLYMER
AB This paper reports Seebeck effects from optically-induced intramolecular proton-transfer HPI-Cbz molecules based on vertical electrode/organic film/electrode thin-film devices. We observed large Seebeck coefficients of 428 mu V/K and 390 mu V/K from HPI-Cbz based thin-film devices at 60 degrees C when proton-transfer was induced by the photoexcitation of a 325 nm laser with an intensity of 12 mW/cm(2) and 6 mW/cm(2) respectively. Under dark condition without proton transfer occurring, the Seebeck coefficient was measured to be 342 mu V/K at 60 degrees C. The Seebeck coefficient enhancement by the induced intramolecular charge transfer can be attributed to the enhanced polarization difference between high-and low-temperature surface due to the stronger electron-phonon coupling followed with the proton-transfer in HPI-Cbz under photoexcitation, and the strength of electron-phonon coupling is proportional to the photoexcitation intensity. The enhanced temperature-dependent electrical polarization between the high and low-temperature surfaces acts as an additional driving force to diffuse the majority charge carriers for the development of a large Seebeck effect. Therefore, using intramolecular proton-transfer presents an effective approach of enhancing Seebeck effect in organic materials. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Hu, Dehua; Liu, Qing; Tisdale, Jeremy; Hu, Bin] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Nam, Haerim; Park, Soo Young] Seoul Natl Univ, Dept Mat Sci & Engn, ENG445, Seoul 151744, South Korea.
[Wang, Hsin] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Urbas, Augustine] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Hu, Dehua] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China.
RP Hu, B (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM bhu@utk.edu
RI Park, Soo Young/G-1080-2012; Wang, Hsin/A-1942-2013
OI Park, Soo Young/0000-0002-2272-8524; Wang, Hsin/0000-0003-2426-9867
FU Air Force Office of Scientific Research (AFOSR) [FA 9550-15-1-0064];
National Science Foundation [CBET-1438181]; Sustainable Energy Education
and Research Center; Center for Materials Processing at the University
of Tennessee; Division of Scientific User Facilities, U.S. Department of
Energy [CNMS2012-106, CNMS2012-107, CNMS-2012-108]; National Significant
Program [2014CB643506, 2013CB922104]; NSFC Program in China [61475051];
National Science Foundation of China [51403063]; China Postdoctoral
Science Fund [2014M562174]
FX This research was supported by the financial supports from Air Force
Office of Scientific Research (AFOSR) (FA 9550-15-1-0064) and National
Science Foundation (CBET-1438181). The authors also acknowledge the
support from Sustainable Energy Education and Research Center and Center
for Materials Processing at the University of Tennessee. This research
was partially conducted at the Center for Nanophase Materials Sciences
based on user project (CNMS2012-106, CNMS2012-107, CNMS-2012-108), which
is sponsored at Oak Ridge National Laboratory by the Division of
Scientific User Facilities, U.S. Department of Energy. The authors also
acknowledge the supports from the National Significant Program
(2014CB643506, 2013CB922104) and NSFC Program (61475051) in China. The
authors also acknowledge the supports from National Science Foundation
of China (Grant No. 51403063) and China Postdoctoral Science Fund (Grant
No. 2014M562174).
NR 31
TC 2
Z9 2
U1 3
U2 58
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1566-1199
EI 1878-5530
J9 ORG ELECTRON
JI Org. Electron.
PD NOV
PY 2015
VL 26
BP 117
EP 120
DI 10.1016/j.orgel.2015.07.029
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA CR3IX
UT WOS:000361226900019
ER
PT J
AU Li, XN
Zhu, Z
Li, F
Peng, RR
Zhai, XF
Fu, ZP
Lu, YL
AF Li, Xiaoning
Zhu, Zhu
Li, Feng
Peng, Ranran
Zhai, Xiaofang
Fu, Zhengping
Lu, Yalin
TI Facile route to prepare grain-oriented multiferroic Bi7Fe3-xCoxTi3O21
ceramics
SO JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
LA English
DT Article
DE Grain-oriented; Aurivillius phase; Hydrothermal method; Pressureless
sintering; Doping
ID PIEZOELECTRIC PROPERTIES; FERROELECTRIC CERAMICS; ELECTRICAL-PROPERTIES;
BI4TI3O12 CERAMICS; MAGNETIC-FIELD; GROWTH; ORIENTATION; TEMPERATURE;
ALIGNMENT; CRYSTAL
AB A facile route was developed to fabricate Bi7Fe3-xCoxTi3O21 (BECTO) ceramics in which the micrometer sized grains were highly 10 0 1] oriented. The preparation involved dry pressing nanoplates with high aspect ratio under low axial pressure (10 MPa), and subsequently sintering the green compact at high temperature without applied pressure. The formation mechanism and the effects of Co doping on the orientation were investigated. The results indicated that the orientation degree of BECTO grains was depended on the aspect ratio of nanoplate powder, which increased with the increase of doping amount of Co. The degree of orientation was achieved as high as 0.91 in Bi7Fe2CoTi3O21 ceramic. The saturation magnetization (2 Ms) values were larger when surfaces of the oriented grains were perpendicular to the direction of applied magnetic field, indicating obvious anisotropic magnetism. This fabrication method provided an economical yet convenient approach to manufacture grain-oriented complex oxide ceramics with improved magnetic property. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Li, Xiaoning; Zhu, Zhu; Li, Feng; Peng, Ranran; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Peng, Ranran; Zhai, Xiaofang; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Peng, Ranran; Zhai, Xiaofang; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Fu, ZP (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
EM fuzp@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010
FU National Basic Research Program of China [2012CB922000]; Chinese Academy
of Sciences [KGZD-EW-T06]
FX This work was financially supported by the National Basic Research
Program of China (2012CB922000) and Key Research Program of Chinese
Academy of Sciences (grant no. KGZD-EW-T06).
NR 27
TC 2
Z9 2
U1 2
U2 57
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0955-2219
EI 1873-619X
J9 J EUR CERAM SOC
JI J. Eur. Ceram. Soc.
PD NOV
PY 2015
VL 35
IS 13
BP 3437
EP 3443
DI 10.1016/j.jeurceramsoc.2015.05.032
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA CO3AS
UT WOS:000359029300009
ER
PT J
AU Ahmed, M
Khawaja, M
Notarianni, M
Wang, B
Goding, D
Gupta, B
Boeckl, JJ
Takshi, A
Motta, N
Saddow, SE
Iacopi, F
AF Ahmed, Mohsin
Khawaja, Mohamad
Notarianni, Marco
Wang, Bei
Goding, Dayle
Gupta, Bharati
Boeckl, John J.
Takshi, Arash
Motta, Nunzio
Saddow, Stephen E.
Iacopi, Francesca
TI A thin film approach for SiC-derived graphene as an on-chip electrode
for supercapacitors
SO NANOTECHNOLOGY
LA English
DT Article
DE on-chip supercapacitors; graphene; silicon carbide
ID ELECTROCHEMICAL CAPACITORS; PORE-SIZE; CARBIDE; CARBON; PERFORMANCES;
NANOSHEETS; THICKNESS; POROSITY; GROWTH; OXIDE
AB We designed a nickel-assisted process to obtain graphene with sheet resistance as low as 80 Omega square-1 from silicon carbide films on Si wafers with highly enhanced surface area. The silicon carbide film acts as both a template and source of graphitic carbon, while, simultaneously, the nickel induces porosity on the surface of the film by forming silicides during the annealing process which are subsequently removed. As stand-alone electrodes in supercapacitors, these transfer-free graphene-on-chip samples show a typical double-layer supercapacitive behaviour with gravimetric capacitance of up to 65 F g(-1). This work is the first attempt to produce graphene with high surface area from silicon carbide thin films for energy storage at the wafer-level and may open numerous opportunities for on-chip integrated energy storage applications.
C1 [Ahmed, Mohsin; Wang, Bei; Goding, Dayle; Iacopi, Francesca] Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.
[Khawaja, Mohamad; Notarianni, Marco; Takshi, Arash; Saddow, Stephen E.] Univ S Florida, Dept Elect Engn, Tampa, FL 33620 USA.
[Notarianni, Marco; Gupta, Bharati; Motta, Nunzio] Queensland Univ Technol, Inst Future Environm, Brisbane, Qld 4001, Australia.
[Notarianni, Marco] Plasma Therm LLC, St Petersburg, FL 33716 USA.
[Boeckl, John J.] US Air Force, Res Lab, Dayton, OH USA.
RP Ahmed, M (reprint author), Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.
EM f.iacopi@griffith.edu.au
RI Iacopi, Francesca/D-8934-2013; Wang, Bei/J-6550-2012; Griffith
University, QMNC/I-5498-2013;
OI Iacopi, Francesca/0000-0002-3196-0990; Wang, Bei/0000-0002-3793-0629;
Motta, Nunzio/0000-0002-3857-1031
FU Australian Research Council [FT120100445]; AFOSR [AOARD 144045];
Australian National Fabrication Facility (ANFF)
FX Assoc Prof F Iacopi is the recipient of an Australian Research Council
Future Fellowship (FT120100445). Support from the AFOSR through the
grant AOARD 144045 is also acknowledged, as well as infrastructure
support through the Australian National Fabrication Facility (ANFF). The
technical support of Dr Peter Hines and Dr Jamie Riches at the Central
Analytical Research Facility of the Institute of Future Environments are
also kindly acknowledged.
NR 31
TC 5
Z9 5
U1 5
U2 32
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
EI 1361-6528
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 30
PY 2015
VL 26
IS 43
AR 434005
DI 10.1088/0957-4484/26/43/434005
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CU3OE
UT WOS:000363433900006
PM 26447742
ER
PT J
AU Tang, Z
Senkov, ON
Parish, CM
Zhang, C
Zhang, F
Santodonato, LJ
Wang, GY
Zhao, GF
Yang, FQ
Liaw, PK
AF Tang, Zhi
Senkov, Oleg N.
Parish, Chad M.
Zhang, Chuan
Zhang, Fan
Santodonato, Louis J.
Wang, Gongyao
Zhao, Guangfeng
Yang, Fuqian
Liaw, Peter K.
TI Tensile ductility of an AlCoCrFeNi multi-phase high-entropy alloy
through hot isostatic pressing (HIP) and homogenization
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE High-entropy alloys; Microstructures; Tensile properties; Heat
treatment; Thermodynamic modeling; Crack initiation
ID PRINCIPAL ELEMENT ALLOYS; V-ZR SYSTEM; MECHANICAL-PROPERTIES;
PHASE-STABILITY; SIGMA-PHASE; COMPUTATIONAL THERMODYNAMICS;
ELEVATED-TEMPERATURES; CORROSION BEHAVIOR; STAINLESS-STEEL; AL ADDITION
AB The microstructure and phase composition of an AlCoCrFeNi high-entropy alloy (HEA) were studied in as-cast (AlCoCrFeNi-AC, AC represents as-cast) and homogenized (AlCoCrFeNi-HP, HP signifies hot iso-static pressed and homogenized) conditions. The AlCoCrFeNi-AC ally has a dendritric structure in the consisting primarily of a nano-lamellar mixture of A2 (disordered body-centered-cubic (BCC)) and B2 (ordered BCC) phases, formed by an eutectic reaction. The homogenization heat treatment, consisting of hot isostatic pressed for 1 h at 1100 degrees C, 207 MPa and annealing at 1150 degrees C for 50 h, resulted in an increase in the volume fraction of the A1 phase and formation of a Sigma (sigma) phase. Tensile properties in as-cast and homogenized conditions are reported at 700 degrees C. The ultimate tensile strength was virtually unaffected by heat treatment, and was 396 +/- 4 MPa at 700 degrees C. However, homogenization produced a noticeable increase in ductility. The AlCoCrFeNi-AC alloy showed a tensile elongation of only 1.0%, while after the heat-treatment, the elongation of AlCoCrFeNi-HP was 11.7%. Thermodynamic modeling of nonequilibrium and equilibrium phase diagrams for the AlCoCrFeNi HEA gave good agreement with the experimental observations of the phase contents in the AlCoCrFeNi-AC and AlCoCrFeNi-HP. The reasons for the improvement of ductility after the heat treatment and the crack initiation subjected to tensile loading were discussed. Published by Elsevier B.V.
C1 [Tang, Zhi; Santodonato, Louis J.; Wang, Gongyao; Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Tang, Zhi] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA.
[Senkov, Oleg N.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Parish, Chad M.; Santodonato, Louis J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Zhang, Chuan; Zhang, Fan] CompuTherrn LLC, Madison, WI 53719 USA.
[Zhao, Guangfeng; Yang, Fuqian] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA.
RP Tang, Z (reprint author), Alcoa Tech Ctr, Alloy Technol Div, 100 Tech Dr, Alcoa Ctr, PA 15069 USA.
EM Zhi.Tang@alcoa.com; pliaw@utk.edu
RI Parish, Chad/J-8381-2013; Santodonato, Louis/A-9523-2015;
OI Santodonato, Louis/0000-0002-4600-685X; Senkov, Oleg/0000-0001-5587-415X
FU Department of Energy (DOE) Office of Nuclear Energy's Nuclear Energy
University Program (NEUP) [00119262]; DOE, Office of Fossil Energy,
National Energy Technology Laboratory [DE-FE-0008855, DE-FE-0011194,
DE-FE-0024054]; U.S. Army Research Office project [W911NF-13-1-3080438];
United States Air Force (USAF) [FA8650-10-D-5226]; Oak Ridge National
Laboratory (ORNL)'s Shared Research Equipment (ShaRE) User Program -
Office of Basic Energy Sciences, U.S. Department of Energy
FX The authors very much appreciate the original proposed idea of this work
from D.B. Miracle of the Air Force Research Laboratory (AFRL) and his
many great comments and discussions on this paper. ZT, LJS, GW, and PKL
would like to acknowledge the financial support from the Department of
Energy (DOE) Office of Nuclear Energy's Nuclear Energy University
Program (NEUP) 00119262, and the DOE, Office of Fossil Energy, National
Energy Technology Laboratory (DE-FE-0008855, DE-FE-0011194, and
DE-FE-0024054), with R.O. Jensen, Jr., L. Tian, V. Cedro, S. Lesica, S.
Markovich, J. Mullen, and R. Dunst as program managers. PKL thanks the
U.S. Army Research Office project (W911NF-13-1-3080438) with the program
manager, S.N. Mathaudhu and D.M. Stepp. The authors also gratefully
acknowledge D. Robinson of the Advanced Photon Source CAPS) in the
Argonne National Laboratory for assistance with the high-energy X-ray
diffraction measurements, D. Fielden, M. Bharadwaj and G. Jones of The
University of Tennessee (UT) for the technical support. ZT very much
appreciates C.P. Chuang, J.E. Spruiell, and C.D. Lundin of UT, J.S. Hou
of the Chinese Academy of Sciences, J.W. Qiao of Taiyuan University of
Technology China, M.C. Gao of the National Energy Technology Laboratory
(NETL) for helpful discussions. Work at AFRL was supported through the
United States Air Force (USAF) Contract no. FA8650-10-D-5226. Research
sponsored by the Oak Ridge National Laboratory (ORNL)'s Shared Research
Equipment (ShaRE) User Program, which was sponsored by the Office of
Basic Energy Sciences, U.S. Department of Energy (C.M. Parish). The
authors very much appreciate M.K. Miller of ORNL for his efforts on the
atom-probe tomography (APT).
NR 77
TC 15
Z9 15
U1 25
U2 70
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 28
PY 2015
VL 647
BP 229
EP 240
DI 10.1016/j.msea.2015.08.078
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA CV4PX
UT WOS:000364250100029
ER
PT J
AU Belyea, DD
Lucas, MS
Michel, E
Horwath, J
Miller, CW
AF Belyea, Dustin D.
Lucas, M. S.
Michel, E.
Horwath, J.
Miller, Casey W.
TI Tunable magnetocaloric effect in transition metal alloys
SO SCIENTIFIC REPORTS
LA English
DT Article
ID ROOM-TEMPERATURE; MAGNETIC REFRIGERATION; FIELD-DEPENDENCE; PHASE
AB The unpredictability of geopolitical tensions and resulting supply chain and pricing instabilities make it imperative to explore rare earth free magnetic materials. As such, we have investigated fully transition metal based "high entropy alloys" in the context of the magnetocaloric effect. We find the NiFeCoCrPdx family exhibits a second order magnetic phase transition whose critical temperature is tunable from 100 K to well above room temperature. The system notably displays changes in the functionality of the magnetic entropy change depending on x, which leads to nearly 40% enhancement of the refrigerant capacity. A detailed statistical analysis of the universal scaling behavior provides direct evidence that heat treatment and Pd additions reduce the distribution of exchange energies in the system, leading to a more magnetically homogeneous alloy. The general implications of this work are that the parent NiFeCoCr compound can be tuned dramatically with FCC metal additives. Together with their relatively lower cost, their superior mechanical properties that aid manufacturability and their relative chemical inertness that aids product longevity, NiFeCoCr-based materials could ultimately lead to commercially viable magnetic refrigerants.
C1 [Belyea, Dustin D.] Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
[Lucas, M. S.; Michel, E.; Horwath, J.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Lucas, M. S.] UTC Inc, Dayton, OH 45432 USA.
[Michel, E.] Wright State Univ, Dayton, OH 45435 USA.
[Miller, Casey W.] Rochester Inst Technol, Sch Chem & Mat Sci, Rochester, NY 14623 USA.
RP Miller, CW (reprint author), Rochester Inst Technol, Sch Chem & Mat Sci, 85 Lomb Mem Dr, Rochester, NY 14623 USA.
EM cwmsch@rit.edu
FU US National Science Foundation [1522927]
FX Supported by the US National Science Foundation through Award 1522927.
Thanks to G. S. Nolas for help with annealing, and J. Rohr for useful
discussions.
NR 29
TC 7
Z9 7
U1 8
U2 42
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD OCT 28
PY 2015
VL 5
AR 15755
DI 10.1038/srep15755
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CU4UF
UT WOS:000363525100001
PM 26507636
ER
PT J
AU Li, XN
Zhu, Z
Li, F
Huang, Y
Hu, X
Huang, HL
Peng, RR
Zhai, XF
Fu, ZP
Lu, YL
AF Li, Xiaoning
Zhu, Zhu
Li, Feng
Huang, Yan
Hu, Xiang
Huang, Haoliang
Peng, Ranran
Zhai, XiaoFang
Fu, Zhengping
Lu, Yalin
TI Multifunctional Single-Phase Photocatalysts: Extended Near Infrared
Photoactivity and Reliable Magnetic Recyclability
SO SCIENTIFIC REPORTS
LA English
DT Article
ID TEMPERATURE MULTIFERROIC PROPERTIES; INTERNAL POLAR FIELD;
VISIBLE-LIGHT; ARTIFICIAL PHOTOSYNTHESIS; SEPARATED PHOTOCATALYST;
ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; ENERGY-CONVERSION; WATER;
METAL
AB A practical photocatalyst should be able to integrate together various functions including the extended solar conversion, a feasible and economic recyclability, and above the room temperature operation potential, et al., in order to fulfill the spreading application needs in nowadays. In this report, a multifunctional single-phase photocatalyst which possesses a high photoactivity extended into the near infrared region, an easy magnetic recyclability and the high temperature stability was developed by doping Co into a new layer-structured Bi7Fe3Ti3O21 material. Light absorption and photocatalytic activity of the resulted Bi7Fe3-xCoxTi3O21 photocatalyst were extended to the long wavelength as far as 800 nm. Its strong ferromagnetism above the room temperature enables the nanopowders fully recyclable in viscous solutions simply with a magnet bar in an experimental demonstration. Furthermore, such photoactivity and magnetic recyclability were heavily tested under high-temperature and high-viscosity conditions, which was intended to simulate the actual industrial environments. This work brings the bright light to a full availability of a new multifunctional photocatalyst, via integrating the much enhanced ferromagnetic, ferroelectric, optoelectronic properties, most importantly, into a single-phase structure.
C1 [Li, Xiaoning; Zhu, Zhu; Li, Feng; Huang, Yan; Huang, Haoliang; Peng, Ranran; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Hu, Xiang; Zhai, XiaoFang; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Peng, Ranran; Zhai, XiaoFang; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Fu, ZP (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
EM fuzp@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010
FU National Basic Research Program of China [2012CB922000]; Key Research
Program of Chinese Academy of Sciences [KGZD-EW-T06]
FX This work was financially supported by the National Basic Research
Program of China (2012CB922000), Key Research Program of Chinese Academy
of Sciences (Grant No. KGZD-EW-T06).
NR 48
TC 2
Z9 2
U1 13
U2 59
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD OCT 27
PY 2015
VL 5
AR 15511
DI 10.1038/srep15511
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CU3UJ
UT WOS:000363450700001
PM 26503907
ER
PT J
AU Huang, Y
Wang, GP
Sun, SJ
Wang, JL
Peng, RR
Lin, Y
Zhai, XF
Fu, ZP
Lu, YL
AF Huang, Yan
Wang, Guopeng
Sun, Shujie
Wang, Jianlin
Peng, Ranran
Lin, Yue
Zhai, Xiaofang
Fu, Zhengping
Lu, Yalin
TI Observation of Exchange Anisotropy in Single-Phase Layer-Structured
Oxides with Long Periods
SO SCIENTIFIC REPORTS
LA English
DT Article
ID AURIVILLIUS PHASES; FIELD CONTROL; BIAS; SPINTRONICS; BEHAVIOR; LIMIT
AB A remarkable exchange bias effect arising from the temperature-dependent interaction among the ferromagnetic-like cluster glasses and antiferromagnetic regions was observed in a newly developed single-phase multiferroic compound of Bi10Fe6Ti3O30 which has a nine-layer Aurivillius structure. Inhomogeneous distribution of magnetic Fe ions inside this long-period layered structure was experimentally identified via the atomic level imaging. The results confirmed the presence of the short-range magnetic ordering (the cluster glassy state) and the canted antiferromagnetism, and then the direct interaction among them was further confirmed. Finding of this new single-phase material accompanying this remarkable exchange bias effect would be beneficial to both basic physics understanding and the potential device development.
C1 [Huang, Yan; Wang, Guopeng; Sun, Shujie; Peng, Ranran; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Peng, Ranran; Lin, Yue; Zhai, Xiaofang; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Peng, Ranran; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Synergy Innovat Ctr Quantum Informat & Quantum Ph, Hefei 230026, Peoples R China.
[Wang, Jianlin; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Peng, RR (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
EM pengrr@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010; Sun, Shujie/N-1421-2016
OI Sun, Shujie/0000-0001-7079-8378
FU National Basic Research Program of China [2012CB922001]; National
Natural Science Foundation of China [51072193]; Fundamental Research
Funds for the Central Universities [WK2060140019]; US Air Force Office
of Scientific Research; DTRA [DTRAA 122221]
FX This work was financially supported by the National Basic Research
Program of China (2012CB922001), the National Natural Science Foundation
of China (51072193) and the Fundamental Research Funds for the Central
Universities (WK2060140019). Dr. Lu thanks the support from US Air Force
Office of Scientific Research and the support from DTRA (DTRAA 122221).
NR 30
TC 1
Z9 1
U1 5
U2 31
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD OCT 21
PY 2015
VL 5
AR 15261
DI 10.1038/srep15261
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CU1MD
UT WOS:000363285100001
PM 26487509
ER
PT J
AU Anderson, B
Flores, A
Holten, R
Dajani, I
AF Anderson, Brian
Flores, Angel
Holten, Roger
Dajani, Iyad
TI Comparison of phase modulation schemes for coherently combined fiber
amplifiers
SO OPTICS EXPRESS
LA English
DT Article
ID STIMULATED BRILLOUIN-SCATTERING; OPTICAL-FIBERS; LINEWIDTH; LOCKING;
ARRAY; KW
AB Optical linewidth broadening through both white noise (WNS) and pseudo-random binary sequence (PBRS) phase modulation are effective techniques for suppressing stimulated Brillouin scattering (SBS) in high-power fiber amplifiers. However, detailed studies comparing both coherent beam combining and SBS suppression of these phase modulation schemes have not been reported. In this study, a passive fiber cutback experiment is performed comparing the SBS threshold enhancement factor of a PRBS and WNS broadened seed as a function of linewidth and fiber length. Particularly, assuming an optimal PRBS pattern is chosen, pseudo-random modulation provides superior SBS suppression than WNS for a given fiber length and signal linewidth. Furthermore, two WNS and PRBS modulated 150 W fiber lasers are coherently combined to measure and compare the combining efficiency, beam quality, and coherence as a function of optical path length difference. Notably, the discrete spectral density of PRBS modulation provides a re-coherence effect where the lasers periodically come back into phase. Overall, this may reduce path length matching complexity in coherently combined fiber laser systems. (C) 2015 Optical Society of America
C1 [Anderson, Brian; Flores, Angel; Holten, Roger; Dajani, Iyad] Air Force Res Lab, Kirtland AFB, Albuquerque, NM 87117 USA.
[Anderson, Brian] Univ Cent Florida, CREOL, Orlando, FL 32816 USA.
RP Flores, A (reprint author), Air Force Res Lab, Kirtland AFB, Albuquerque, NM 87117 USA.
EM angel.flores.1@us.af.mil
FU Air Force Office of Scientific Research (AFOSR); Air Force Research
Laboratory (AFRL) Scholars program
FX The authors would like to thank Dr. John Luginsland of the Air Force
Office of Scientific Research (AFOSR) and the Air Force Research
Laboratory (AFRL) Scholars program for partially supporting this
research. The authors would also like to thank Drs. Chunte Lu and Craig
Robin for help with some of the early work on this project.
NR 11
TC 13
Z9 13
U1 3
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD OCT 19
PY 2015
VL 23
IS 21
BP 27046
EP 27060
DI 10.1364/OE.23.027046
PG 15
WC Optics
SC Optics
GA CY7FR
UT WOS:000366574400017
PM 26480366
ER
PT J
AU Hague, RK
Barker, K
Ramirez-Marquez, JE
AF Hague, Robert K.
Barker, Kash
Ramirez-Marquez, Jose E.
TI Interval-valued availability framework for supplier selection based on
component importance
SO INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
LA English
DT Article
DE supplier selection; availability; importance measures; multi-criteria
decision-making
ID FUZZY TOPSIS; DECISION; MODEL; RISK; INTEGRATION; CRITERIA; CHAIN; AHP
AB The availability of ageing systems, particularly weapon systems within the Department of Defense, is of significant concern, as budgets tighten and system replacement is infeasible. This work addresses the selection of sole suppliers according to their ability to provide component parts that strengthen availability of the system. We extend a popular multi-criteria decision-making approach, Technique for Order Preferences by Similarity to an Ideal Solution, by (i) considering the availability of individual components as the criteria in the decision problem and (ii) weighting those criteria according to the value of component importance measures while (iii) accounting for uncertainty in underlying reliability and maintainability parameters with interval numbers. An aircraft example illustrates the approach.
C1 [Hague, Robert K.] Tinker AFB, Oklahoma City, OK USA.
[Hague, Robert K.; Barker, Kash] Univ Oklahoma, Sch Ind & Syst Engn, Norman, OK 73019 USA.
[Ramirez-Marquez, Jose E.] Stevens Inst Technol, Sch Syst & Enterprises, Engn Management Program, Syst Dev & Matur Lab, Hoboken, NJ 07030 USA.
RP Barker, K (reprint author), Univ Oklahoma, Sch Ind & Syst Engn, Norman, OK 73019 USA.
EM kashbarker@ou.edu
OI Barker, Kash/0000-0002-0142-1558
FU Naval Postgraduate School Assistance - NAVSUP Fleet Logistics Center San
Diego [N00244-14-1-0027]; United States Air Force
FX This publication results from research supported by the Naval
Postgraduate School Assistance [grant number N00244-14-1-0027] awarded
by the NAVSUP Fleet Logistics Center San Diego. Further, this work was
supported in part by tuition assistance funding provided by the United
States Air Force.
NR 38
TC 3
Z9 3
U1 3
U2 18
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0020-7543
EI 1366-588X
J9 INT J PROD RES
JI Int. J. Prod. Res.
PD OCT 18
PY 2015
VL 53
IS 20
BP 6083
EP 6096
DI 10.1080/00207543.2015.1018454
PG 14
WC Engineering, Industrial; Engineering, Manufacturing; Operations Research
& Management Science
SC Engineering; Operations Research & Management Science
GA CP5FL
UT WOS:000359906600004
ER
PT J
AU Wang, SY
Abeysinghe, DC
Zhan, QW
AF Wang, Shiyi
Abeysinghe, Don C.
Zhan, Qiwen
TI Generation of vectorial optical fields with slot-antenna-based
metasurface
SO OPTICS LETTERS
LA English
DT Article
ID BEAMS; VORTEX; LIGHT; BIREFRINGENCE; MANIPULATION; CREATION; VACUUM;
NEEDLE
AB A transmission-type metasurface composed of carefully designed rectangular slot antennas for the generation of vectorial optical fields is proposed and demonstrated. Acting as local linear polarizers, these slot antennas enable the spatial modulation of optical fields in amplitude, phase, and polarization for the cross-polarized component of the scattered field. As an illustration, a metasurface capable of forming a radially polarized scattered field with specific vectorial beam patterns with appropriate excitation at normal incidence is designed, fabricated, and tested. The radially polarized scattered field is designed to be further tightly focused by a high numerical aperture objective lens in order to obtain a uniform longitudinally polarized optical needle field along the propagation direction. Characterization experiments demonstrate that its overall extinction ratio satisfies the amplitude modulation requirement, and a corresponding pi phase modulation is realized as proposed. (C) 2015 Optical Society of America
C1 [Wang, Shiyi; Zhan, Qiwen] Univ Dayton, Electroopt Grad Program, Dayton, OH 45469 USA.
[Abeysinghe, Don C.] US Air Force, Res Lab, Wright Patterson Air Force Base, Dayton, OH 45433 USA.
RP Zhan, QW (reprint author), Univ Dayton, Electroopt Grad Program, 300 Coll Pk, Dayton, OH 45469 USA.
EM qzhan1@udayton.edu
OI Wang, Shiyi/0000-0001-6175-1017
NR 22
TC 8
Z9 9
U1 8
U2 36
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD OCT 15
PY 2015
VL 40
IS 20
BP 4711
EP 4714
DI 10.1364/OL.40.004711
PG 4
WC Optics
SC Optics
GA CV7QF
UT WOS:000364468400036
PM 26469601
ER
PT J
AU Shea, CJA
Carhuatanta, KAK
Wagner, J
Bechmann, N
Moore, R
Herman, JP
Jankord, R
AF Shea, Chloe J. A.
Carhuatanta, Kimberly A. K.
Wagner, Jessica
Bechmann, Naomi
Moore, Raquel
Herman, James P.
Jankord, Ryan
TI Variable impact of chronic stress on spatial learning and memory in BXD
mice
SO PHYSIOLOGY & BEHAVIOR
LA English
DT Article; Proceedings Paper
CT 2014 Neurobiology Stress Workshop
CY JUN 17-20, 2014
CL Cincinnati, OH
DE BXD; QTL; Stress; Spatial learning; Spatial memory; Genetics
ID FAMILIAL HEMIPLEGIC MIGRAINE; CHRONIC UNPREDICTABLE STRESS; QUANTITATIVE
TRAIT LOCI; MORRIS WATER MAZE; GENETIC-DETERMINANTS; EXPRESSION; RATS;
CORTEX; PERFORMANCE; DEFICIENCY
AB The effects of chronic stress on learning are highly variable across individuals. This variability stems from gene-environment interactions. However, the mechanisms by which stress affects genetic predictors of learning are unclear. Thus, we aim to determine whether the genetic pathways that predict spatial memory performance are altered by previous exposure to chronic stress. Sixty-two BXD recombinant inbred strains of mice, as well as parent strains C57BL/6J and DBA/2J, were randomly assigned as behavioral control or to a chronic variable stress paradigm and then underwent behavioral testing to assess spatial memory and learning performance using the Morris water maze. Quantitative trait loci (QTL) mapping was completed for average escape latency times for both control and stress animals. Loci on chromosomes 5 and 10 were found in both control and stress environmental populations; eight additional loci were found to be unique to either the control or stress environment. In sum, results indicate that certain genetic loci predict spatial memory performance regardless of prior stress exposure, while exposure to stress also reveals unique genetic predictors of training during the memory task. Thus, we find that genetic predictors contributing to spatial learning and memory are susceptible to the presence of chronic stress. Published by Elsevier Inc.
C1 [Shea, Chloe J. A.; Carhuatanta, Kimberly A. K.; Wagner, Jessica; Bechmann, Naomi; Moore, Raquel; Jankord, Ryan] US Air Force, Appl Neurosci, Wright Patterson AFB, OH 45433 USA.
[Carhuatanta, Kimberly A. K.] Natl Acad Sci, Natl Res Council, Res Associate Program, Washington, DC 20001 USA.
[Bechmann, Naomi; Moore, Raquel] Infoscitex Inc, Dayton, OH 45435 USA.
[Herman, James P.] Univ Cincinnati, Dept Psychiat & Behav Neurosci, Cincinnati, OH 45267 USA.
RP Jankord, R (reprint author), 711thHuman Performance Wing, Wright Patterson AFB, OH 45433 USA.
EM Ryan.Jankord@us.af.mil
RI Herman, James/D-4960-2015
OI Herman, James/0000-0003-3571-2406
FU Air Force Office of Scientific Research/Air Force Research Laboratory
(AFOSR/AFRL) [14RH08COR]
FX This work was completed with the help of TSgt Laura Bass, Dr. Megan
Durbin, TSgt Andrew Jimenez, Dr. Catherine Harrison, Dr. Erica Johnson,
Dr. Tom Lamkin, 1st Lt Danielle McCarty and 1st Lt Wilson Tucker. This
work was supported by the Air Force Office of Scientific Research/Air
Force Research Laboratory (AFOSR/AFRL) (14RH08COR). Distribution A:
approved for public release: distribution unlimited. 88ABW-2013-4761.
NR 44
TC 3
Z9 3
U1 0
U2 19
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0031-9384
J9 PHYSIOL BEHAV
JI Physiol. Behav.
PD OCT 15
PY 2015
VL 150
SI SI
BP 69
EP 77
DI 10.1016/j.physbeh.2015.06.022
PG 9
WC Psychology, Biological; Behavioral Sciences
SC Psychology; Behavioral Sciences
GA CR5RG
UT WOS:000361401000011
PM 26079812
ER
PT J
AU de Leon, A
Arias, E
Moggio, I
Gallardo-Vega, C
Ziolo, R
Rodriguez, O
Trigari, S
Giorgetti, E
Leibig, C
Evans, D
AF de Leon, Arxel
Arias, Eduardo
Moggio, Ivana
Gallardo-Vega, Carlos
Ziolo, Ronald
Rodriguez, Oliverio
Trigari, Silvana
Giorgetti, Emilia
Leibig, Carl
Evans, Dean
TI Synthesis of mercaptopropyl-(phenylene)s-benzoates passivated gold
nanoparticles: Implications for plasmonic photovoltaic cells
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE Nanoparticles; Tetraoctylammonium bromide; AFM; EFM; Optical properties;
Simulation; Solar cells
ID SOLAR-CELLS; BANDGAP POLYMERS; AU NANOPARTICLES; EFFICIENCY;
ENHANCEMENT; DEVICES
AB The incorporation of gold nanoparticles in heterojunction solar cells is expected to increase the efficiency due to plasmon effects, but the literature studies are sometimes controversial. In this work, gold nanoparticles passivated with (Ph)(n)-(CH2)(3)SH (n = 1, 2,3) have been synthesized by reduction of tetrachloroauric acid with sodium borohydride in two ways: (1) one-phase where both the thiol and the gold salt are solubilized in a mixture of methanol with acetic acid: Au-s-(Ph)(n) or (2), two-phase, using tetraoctylammonium bromide (TOAB) to transfer gold from water to toluene where the thiol is solubilized, Au(TOAB)-s-(Ph)(n). The morphological, experimental and simulated optical properties were studied and analyzed as a function of the thiol and of the synthetic procedure in order to correlate them with the efficiency of plasmonic hybrid solar cells in the following configuration ITO/PEDOT:PSS/P3HT:PCBM-C60:A u-nanoparticles/Field's metal, where PEDOT:PSS is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), P3HT is poly(3-hexylthiophene-2,5-diyl) and PCBM-C60 is [6,6]-Phenyl C61 butyric acid methyl ester. Our findings indicate that the gold nanoparticles incorporation is affecting the electrical properties of the active layer giving a maximum efficiency for Au-s-(Ph)(3). Moreover, TOAB, which is usually used in the synthesis of thiol passivated gold nanoparticles, has negative effects in both plasmonic and electrical properties. This result is important for optoelectronic applications of gold nanoparticles prepared with any procedures that involve TOAB. (C) 2015 Elsevier Inc. All rights reserved.
C1 [de Leon, Arxel; Arias, Eduardo; Moggio, Ivana; Gallardo-Vega, Carlos; Ziolo, Ronald; Rodriguez, Oliverio] Ctr Invest Quim Aplicada, Saltillo 25294, Coahuila, Mexico.
[Trigari, Silvana; Giorgetti, Emilia] Ist Sistemi Complessi, I-50019 Florence, Italy.
[Leibig, Carl; Evans, Dean] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Moggio, I (reprint author), Ctr Invest Quim Aplicada, Blvd Enrique Reyna 140, Saltillo 25294, Coahuila, Mexico.
EM arxelbmx@gmail.com; eduardo.arias@ciqa.edu.mx; ivana.moggio@ciqa.edu.mx;
carlos.gallardo@ciqa.edu.mx; rziolo@cs.com;
oliverio.rodriguez@ciqa.edu.mx; silvana.trigari@isc.cnr.it;
emilia.giorgetti@fi.isc.cnr.it; carl.liebig.1@us.af.mil;
dean.evans@us.af.mil
FU CONACYT-Mexico [98513R, 232753]; United States Air Force Office for
Scientific Research (AFOSR) [FA9550-11-1-0003]
FX This work was funded by CONACYT-Mexico through the 98513R and 232753
(National Laboratory for Graphene) projects and by the United States Air
Force Office for Scientific Research (AFOSR) through grant
FA9550-11-1-0003. Technical assistance from Enrique Diaz and Pablo Acuna
is acknowledged.
NR 24
TC 0
Z9 0
U1 3
U2 46
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
EI 1095-7103
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD OCT 15
PY 2015
VL 456
BP 182
EP 189
DI 10.1016/j.jcis.2015.06.029
PG 8
WC Chemistry, Physical
SC Chemistry
GA CN5GT
UT WOS:000358458500024
PM 26122799
ER
PT J
AU Fajardo, ME
Molek, CD
Vesely, AL
AF Fajardo, Mario E.
Molek, Christopher D.
Vesely, Annamaria L.
TI Coherent optical transients observed in rubidium atomic line filtered
Doppler velocimetry experiments
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID FOURIER-TRANSFORM RAMAN; GLOBAL VELOCIMETRY; SHOCK-WAVES; DIODE-LASER;
VELOCITY-MEASUREMENTS; FREQUENCY-MODULATION; ALKALI ATOMS; D-2 LINES;
SPECTROSCOPY; INTERFEROMETER
AB We report the first successful results from our novel Rubidium Atomic Line Filtered (RALF) Doppler velocimetry apparatus, along with unanticipated oscillatory signals due to coherent optical transients generated within pure Rb vapor cells. RALF is a high-velocity and high-acceleration extension of the well-known Doppler Global Velocimetry (DGV) technique for constructing multidimensional flow velocity vector maps in aerodynamics experiments [H. Komine, U.S. Patent No. 4,919,536 (24 April 1990)]. RALF exploits the frequency dependence of pressure-broadened Rb atom optical absorptions in a heated Rb/N-2 gas cell to encode the Doppler shift of reflected nearresonant (lambda(0) approximate to 780.24 nm) laser light onto the intensity transmitted by the cell. The present RALF apparatus combines fiber optic and free-space components and was built to determine suitable operating conditions and performance parameters for the Rb/N-2 gas cells. It yields single-spot velocities of thin laser-driven-flyer test surfaces and incorporates a simultaneous Photonic Doppler Velocimetry (PDV) channel [Strand et al., Rev. Sci. Instrum. 77, 083108 (2006)] for validation of the RALF results, which we demonstrate here over the v = 0 to 1 km/s range. Both RALF and DGV presume the vapor cells to be simple Beer's Law optical absorbers, so we were quite surprised to observe oscillatory signals in experiments employing low pressure pure Rb vapor cells. We interpret these oscillations as interference between the Doppler shifted reflected light and the Free Induction Decay (FID) coherent optical transient produced within the pure Rb cells at the original laser frequency; this is confirmed by direct comparison of the PDV and FID signals. We attribute the different behaviors of the Rb/N-2 vs. Rb gas cells to efficient dephasing of the atomic/optical coherences by Rb-N-2 collisions. The minimum necessary N-2 buffer gas density approximate to 0.3 amagat translates into a smallest useful velocity range of 0 to 2 km/s, which can readily be extended to cover the 0 to 10 km/s range, and beyond. The recognition that coherent optical transients can be produced within low pressure vapor cells during velocimetry experiments may offer new insights into some quantitative discrepancies reported in earlier DGV studies. Future plans include "line-RALF" experiments with streak camera detection, and two-dimensional surface velocity mapping using pulsed laser illumination and/or gated intensified CCD camera detection.
C1 [Fajardo, Mario E.; Molek, Christopher D.; Vesely, Annamaria L.] US Air Force, Res Lab, Munit Directorate, Ordnance Div,Energet Mat Branch,AFRL RWME, Eglin AFB, FL 32542 USA.
RP Fajardo, ME (reprint author), US Air Force, Res Lab, Munit Directorate, Ordnance Div,Energet Mat Branch,AFRL RWME, 2306 Perimeter Rd, Eglin AFB, FL 32542 USA.
EM mario.fajardo@eglin.af.mil
NR 83
TC 0
Z9 0
U1 4
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 14
PY 2015
VL 118
IS 14
AR 144901
DI 10.1063/1.4932670
PG 12
WC Physics, Applied
SC Physics
GA CT7CP
UT WOS:000362971200015
ER
PT J
AU Roth, CC
Barnes, RA
Ibey, BL
Beier, HT
Mimun, LC
Maswadi, SM
Shadaram, M
Glickman, RD
AF Roth, Caleb C.
Barnes, Ronald A., Jr.
Ibey, Bennett L.
Beier, Hope T.
Mimun, L. Christopher
Maswadi, Saher M.
Shadaram, Mehdi
Glickman, Randolph D.
TI Characterization of Pressure Transients Generated by Nanosecond
Electrical Pulse (nsEP) Exposure
SO SCIENTIFIC REPORTS
LA English
DT Article
ID GENE-TRANSFER; ULTRASOUND; SONOPORATION; CELLS; CAVITATION; KINETICS;
TISSUE
AB The mechanism(s) responsible for the breakdown (nanoporation) of cell plasma membranes after nanosecond pulse (nsEP) exposure remains poorly understood. Current theories focus exclusively on the electrical field, citing electrostriction, water dipole alignment and/or electrodeformation as the primary mechanisms for pore formation. However, the delivery of a high-voltage nsEP to cells by tungsten electrodes creates a multitude of biophysical phenomena, including electrohydraulic cavitation, electrochemical interactions, thermoelastic expansion, and others. To date, very limited research has investigated non-electric phenomena occurring during nsEP exposures and their potential effect on cell nanoporation. Of primary interest is the production of acoustic shock waves during nsEP exposure, as it is known that acoustic shock waves can cause membrane poration (sonoporation). Based on these observations, our group characterized the acoustic pressure transients generated by nsEP and determined if such transients played any role in nanoporation. In this paper, we show that nsEP exposures, equivalent to those used in cellular studies, are capable of generating high-frequency (2.5 MHz), high-intensity (>13 kPa) pressure transients. Using confocal microscopy to measure cell uptake of YO-PRO (R)-1 (indicator of nanoporation of the plasma membrane) and changing the electrode geometry, we determined that acoustic waves alone are not responsible for poration of the membrane.
C1 [Roth, Caleb C.] Univ Texas Hlth Sci Ctr San Antonio, Dept Radiol Sci, Sch Med, San Antonio, TX 78229 USA.
[Barnes, Ronald A., Jr.; Maswadi, Saher M.; Shadaram, Mehdi] Univ Texas San Antonio, Dept Elect Engn, San Antonio, TX 78249 USA.
[Ibey, Bennett L.] US Air Force, Radio Frequency Bioeffects Branch, Bioeffects Div, Human Effectiveness Directorate,Res Lab, Jbsa Ft Sam Houston, TX 78234 USA.
[Beier, Hope T.] US Air Force, Opt Radiat Bioeffects Branch, Bioeffects Div, Human Effectiveness Directorate,Res Lab, Jbsa Ft Sam Houston, TX 78234 USA.
[Mimun, L. Christopher] Univ Texas San Antonio, Dept Phys, San Antonio, TX 78249 USA.
[Glickman, Randolph D.] Univ Texas Hlth Sci Ctr San Antonio, Sch Med, Dept Ophthalmol, San Antonio, TX 78229 USA.
RP Roth, CC (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Radiol Sci, Sch Med, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA.
EM rothc@livemail.uthscsa.edu
FU USAF AFMC 711th HPW/CL Chief Scientist Seedling Award; OSD-T&E (Office
of Secretary Defense-Test and Evaluation), Defense - National Defense
Education Program (NDEP)/BA-1, Basic Research [Wide/PE0601120D8Z]; Air
Force Office of Scientific Research [AFOSR-LRIR 139RH08COR]
FX This work was supported by USAF AFMC 711th HPW/CL 2014 Chief Scientist
Seedling Award (B. L. I.). Mr. Roth is a SMART Scholar and is supported
by the OSD-T&E (Office of Secretary Defense-Test and Evaluation),
Defense -Wide/PE0601120D8Z National Defense Education Program
(NDEP)/BA-1, Basic Research. This study was also supported by a grant
from the Air Force Office of Scientific Research (AFOSR-LRIR
139RH08COR). We would like to thank Mr. Gary Noojin for his technical
expertise concerning optical setups.
NR 45
TC 3
Z9 3
U1 3
U2 10
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD OCT 9
PY 2015
VL 5
AR 15063
DI 10.1038/srep15063
PG 15
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CT0KE
UT WOS:000362483300001
PM 26450165
ER
PT J
AU Mayberry, CS
Huang, DH
Balakrishnan, G
Kouhestani, C
Islam, N
Brueck, SRJ
Sharma, AK
AF Mayberry, C. S.
Huang, Danhong
Balakrishnan, G.
Kouhestani, C.
Islam, N.
Brueck, S. R. J.
Sharma, A. K.
TI Characterization of carrier transport properties in strained crystalline
Si wall-like structures in the quasi-quantum regime
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID INTERFEROMETRIC LITHOGRAPHY; INTERFACE; SILICON; TECHNOLOGY; MOBILITY;
FINFET; MODEL; GE
AB We report the transport characteristics of both electrons and holes through narrow constricted crystalline Si "wall-like" long-channels that were surrounded by a thermally grown SiO2 layer. The strained buffering depth inside the Si region (due to Si/SiO2 interfacial lattice mismatch) is where scattering is seen to enhance some modes of the carrier-lattice interaction, while suppressing others, thereby changing the relative value of the effective masses of both electrons and holes, as compared to bulk Si. In the narrowest wall devices, a considerable increase in conductivity was observed as a result of higher carrier mobilities due to lateral constriction and strain. The strain effects, which include the reversal splitting of light-and heavy-hole bands as well as the decrease of conduction-band effective mass by reduced Si bandgap energy, are formulated in our microscopic model for explaining the experimentally observed enhancements in both conduction-and valence-band mobilities with reduced Si wall thickness. Also, the enhancements of the valenceband and conduction-band mobilities are found to be associated with different aspects of theoretical model. (C) 2015 AIP Publishing LLC.
C1 [Mayberry, C. S.; Huang, Danhong; Kouhestani, C.; Sharma, A. K.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Balakrishnan, G.; Brueck, S. R. J.; Sharma, A. K.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87106 USA.
[Islam, N.] Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65211 USA.
[Brueck, S. R. J.] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87106 USA.
RP Huang, DH (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM danhong.huang@us.af.mil
FU Air Force Research Laboratory, Space Vehicles Directorate; Air Force
Office of Scientific Research (AFOSR)
FX The authors would like to acknowledge the Air Force Research Laboratory,
Space Vehicles Directorate for their support and interest in this work.
D.H. thanks the Air Force Office of Scientific Research (AFOSR) for its
support.
NR 43
TC 0
Z9 0
U1 1
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 7
PY 2015
VL 118
IS 13
AR 134301
DI 10.1063/1.4931151
PG 11
WC Physics, Applied
SC Physics
GA CT2XG
UT WOS:000362668400018
ER
PT J
AU Kormann, F
Ma, D
Belyea, DD
Lucas, MS
Miller, CW
Grabowski, B
Sluiter, MHF
AF Kormann, F.
Ma, D.
Belyea, D. D.
Lucas, M. S.
Miller, C. W.
Grabowski, B.
Sluiter, M. H. F.
TI "Treasure maps" for magnetic high-entropy-alloys from theory and
experiment
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MAGNETOCALORIC MATERIALS; 1ST-PRINCIPLES THEORY; ROOM-TEMPERATURE;
POTENTIAL MODEL; APPROXIMATION; SEMICONDUCTORS; TRANSITIONS
AB The critical temperature and saturation magnetization for four- and five-component FCC transition metal alloys are predicted using a formalism that combines density functional theory and a magnetic mean-field model. Our theoretical results are in excellent agreement with experimental data presented in both this work and in the literature. The generality and power of this approach allow us to computationally design alloys with well-defined magnetic properties. Among other alloys, the method is applied to CoCrFeNiPd alloys, which have attracted attention recently for potential magnetic applications. The computational framework is able to predict the experimentally measured T-C and to explore the dominant mechanisms for alloying trends with Pd. A wide range of ferromagnetic properties and Curie temperatures near room temperature in hitherto unexplored alloys is predicted in which Pd is replaced in varying degrees by, e.g., Ag, Au, and Cu. (C) 2015 AIP Publishing LLC.
C1 [Kormann, F.; Sluiter, M. H. F.] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands.
[Ma, D.; Grabowski, B.] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany.
[Belyea, D. D.] Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
[Lucas, M. S.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Miller, C. W.] Rochester Inst Technol, Sch Chem & Mat Sci, Rochester, NY 14623 USA.
RP Kormann, F (reprint author), Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands.
EM f.h.w.kormann@tudelft.nl; cwmsch@rit.edu
RI Kormann, Fritz/A-5677-2012; Grabowski, Blazej/D-8430-2012; Ma,
Duancheng/N-1231-2016; Sluiter, Marcel/E-6086-2010
OI Kormann, Fritz/0000-0003-3050-6291; Grabowski,
Blazej/0000-0003-4281-5665; Sluiter, Marcel/0000-0002-6514-4318
FU European Research Council under the EU's 7th Framework Programme
(FP7)/ERC [290998]; Deutsche Forschungsgemeinschaft (DFG) [KO 5080/1-1];
U.S. National Science Foundation [1522927]
FX The authors would like to express their sincere gratitude to Professor
Andrei V. Ruban at Royal Institute of Technology, Stockholm, Sweden for
fruitful discussions on the EMTO calculations. Funding by the European
Research Council under the EU's 7th Framework Programme
(FP7/2007-2013)/ERC Grant Agreement No. 290998 and by the Deutsche
Forschungsgemeinschaft (DFG) for the scholarship KO 5080/1-1 are
gratefully acknowledged. Work at USF and RIT was supported by the U.S.
National Science Foundation through Award No. 1522927; we thank J.
Horwath for discussions.
NR 54
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U1 11
U2 51
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 5
PY 2015
VL 107
IS 14
AR 142404
DI 10.1063/1.4932571
PG 5
WC Physics, Applied
SC Physics
GA CU3JV
UT WOS:000363422100041
ER
PT J
AU Rajabifar, B
Kim, S
Slinker, K
Ehlert, GJ
Hart, AJ
Maschmann, MR
AF Rajabifar, Bahram
Kim, Sanha
Slinker, Keith
Ehlert, Gregory J.
Hart, A. John
Maschmann, Matthew R.
TI Three-dimensional machining of carbon nanotube forests using
water-assisted scanning electron microscope processing
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BEAM; GROWTH; STRENGTH; ARRAYS; SENSOR; DAMAGE
AB We demonstrate that vertically aligned carbon nanotubes (CNTs) can be precisely machined in a low pressure water vapor ambient using the electron beam of an environmental scanning electron microscope. The electron beam locally damages the irradiated regions of the CNT forest and also dissociates the water vapor molecules into reactive species including hydroxyl radicals. These species then locally oxidize the damaged region of the CNTs. The technique offers material removal capabilities ranging from selected CNTs to hundreds of cubic microns. We study how the material removal rate is influenced by the acceleration voltage, beam current, dwell time, operating pressure, and CNT orientation. Milled cuts with depths between 0-100 microns are generated, corresponding to a material removal rate of up to 20.1 mu m(3)/min. The technique produces little carbon residue and does not disturb the native morphology of the CNT network. Finally, we demonstrate direct machining of pyramidal surfaces and re-entrant cuts to create freestanding geometries. (C) 2015 AIP Publishing LLC.
C1 [Rajabifar, Bahram; Maschmann, Matthew R.] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA.
[Kim, Sanha; Hart, A. John] MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
[Kim, Sanha; Hart, A. John] Univ Missouri, Lab Mfg & Prod, Columbia, MO 65211 USA.
[Slinker, Keith; Ehlert, Gregory J.] Air Force Res Lab, AFRL RX, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Slinker, Keith] Univ Technol Corp, Beavercreek, OH 45424 USA.
RP Maschmann, MR (reprint author), Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA.
EM MaschmannM@missouri.edu
RI Hart, A. John/A-9027-2010
OI Hart, A. John/0000-0002-7372-3512
FU Missouri Research Board, Oak Ridge Associated Universities; University
of Missouri startup funds
FX M.R.M. and B.R.F. acknowledge funding from the Missouri Research Board,
Oak Ridge Associated Universities, and from University of Missouri
startup funds. They also thank Dr. Tommi White and the MU Electron
Microscopy Core Facility for providing access to ESEM and microscopy
facilities. S.K. and A.J.H. acknowledge support of the Department of
Energy, Office of Basic Energy Sciences (No. DE-SC0004927) for substrate
preparation and CNT growth.
NR 38
TC 3
Z9 3
U1 3
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 5
PY 2015
VL 107
IS 14
AR 143102
DI 10.1063/1.4932522
PG 5
WC Physics, Applied
SC Physics
GA CU3JV
UT WOS:000363422100057
ER
PT J
AU Poggie, J
Bisek, NJ
Gosse, R
AF Poggie, Jonathan
Bisek, Nicholas J.
Gosse, Ryan
TI Resolution effects in compressible, turbulent boundary layer simulations
SO COMPUTERS & FLUIDS
LA English
DT Article
DE Turbulent boundary layer; Compressible flow; Direct numerical
simulation; Implicit large-eddy simulation; Resolution
ID DIRECT NUMERICAL-SIMULATION; LARGE-EDDY SIMULATION; FLOWS
AB This paper presents the first systematic study of resolution in compressible, turbulent boundary simulations, and the best-resolved simulation carried out to date. Direct numerical simulation (DNS) and wall-resolved, implicit large-eddy simulation (ILES-NWR) were carried out for a turbulent boundary layer at a Mach number of M = 2.3 and maximum momentum thickness Reynolds number of Re-theta i = 2 x 10(3). The wall temperature was fixed at a constant value corresponding to the nominal adiabatic wall temperature. The flow was developed spatially from a laminar boundary layer similarity solution specified at the inflow, and transition to turbulence was promoted with an artificial body force trip. The effects of spatial resolution in the range of ILES-NWR, conventional DNS, and very strict DNS were considered. The finest grid in the spatial resolution study consisted of 33 x 10(10) points, and maintained max (Delta x(1)(+), Delta x(2)(+), Delta x(3)(+)) <= 1 everywhere. With the resolution at the wall held at (Delta x(2)(+))(W) < 1, statistics characterizing large-scale flow features converged for max (Delta x(i)(+)) <= 10, and agreed well with experimental data. Velocity spectra in the outer part of the boundary layer agreed well at low wavenumber for all grids in this range of mesh spacing, and increasing resolution acted to fill out the high-wavenumber end of the spectrum. In all cases, the resolved region of the spectrum agreed well with a well-validated model of the spectrum of isotropic turbulence. Thus, ILES-NWR can be concluded to converge seamlessly to DNS as the spatial resolution is increased. The low-wavenumber aspect of spatial resolution was examined by varying the width of the computational domain, with a fixed level of small-scale resolution. The primary influence of increasing domain width was to capture additional spectral content in low spanwise wavenumbers; other statistics were found to be identical. Further, turbulence statistics were found to be essentially independent of the domain width for values between two and eight times the maximum boundary layer thickness. This work predicts computationally, for the first time, the full velocity spectrum in the outer part of the boundary layer. In doing so, it justifies use of the ILES-NWR approach as long as the maximum grid spacing is less than 10 in inner units, and the domain width is at least two times the maximum boundary layer thickness. Published by Elsevier Ltd.
C1 [Poggie, Jonathan; Bisek, Nicholas J.; Gosse, Ryan] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Poggie, J (reprint author), Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
EM jpoggie@purdue.edu
FU Air Force Office of Scientific Research, under LRIR Task [14RQ18COR];
Department of Defense Supercomputing Resource Centers at the Air Force
Research Laboratory; Army Research Laboratory; Army Engineer Research
and Development Center, provided under a Department of Defense,
High-Performance Computation Modernization Program Frontier Project
FX This project was sponsored in part by the Air Force Office of Scientific
Research, under LRIR Task 14RQ18COR monitored by I. Leyva. It was also
supported by grants of High Performance Computing time from the
Department of Defense Supercomputing Resource Centers at the Air Force
Research Laboratory, the Army Research Laboratory, and the Army Engineer
Research and Development Center, provided under a Department of Defense,
High-Performance Computation Modernization Program Frontier Project.
NR 84
TC 1
Z9 1
U1 3
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7930
EI 1879-0747
J9 COMPUT FLUIDS
JI Comput. Fluids
PD OCT 5
PY 2015
VL 120
BP 57
EP 69
DI 10.1016/j.compfluid.2015.07.015
PG 13
WC Computer Science, Interdisciplinary Applications; Mechanics
SC Computer Science; Mechanics
GA CS0SX
UT WOS:000361773600005
ER
PT J
AU Payne, BC
Tresl, J
AF Payne, Brian C.
Tresl, Jiri
TI Hedge fund replication with a genetic algorithm: breeding a usable
mousetrap
SO QUANTITATIVE FINANCE
LA English
DT Article
DE Hedge Funds; Replication; Genetic Algorithm; C61; G11
ID RISK; RETURNS; PERFORMANCE; ARBITRAGE; MARKET; STYLE
AB This study tests the performance of 14 hedge fund index clones created using parsimonious out-of-sample replication portfolios consisting solely of easily accessible assets. We employ a genetic algorithm to integrate two traditional hedge fund replication methods, the factor-based and pay-off distribution replication methods, and evaluate over 4500 commonly held stocks, bonds and mutual funds as replicating portfolio components. In-sample performance indicates that hedge funds have return series similar to portfolios of commonly held assets, and out-of-sample results provide evidence that the in-sample relationships can hold with infrequent rebalancing. This hedge fund replication attempt rates well relatively to prior efforts as 11 replicating portfolios have out-of-sample correlation values of at least 60%. Overall, these results show promise for using a genetic algorithm technique to replicate hedge fund returns.
C1 [Payne, Brian C.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Tresl, Jiri] Univ Nebraska, Dept Finance, Lincoln, NE 68588 USA.
RP Tresl, J (reprint author), Univ Nebraska, Dept Finance, Lincoln, NE 68588 USA.
EM jtresl2@unl.edu
RI Tresl, Jiri/A-7041-2015
FU Grant Agency of the Czech Republic [14-31783S]; GACR [14-31783S]
FX We would like to thank Keith Black, George McCabe, Alex Gurvich, John
Geppert, Geoffrey Friesen, Richard DeFusco, participants at the 2013
Midwest Finance Association Conference, participants at the 2013 Applied
FMA conference. All mistakes are ours. This work was supported in part
by Grant Agency of the Czech Republic [14-31783S]. The views expressed
in this paper are those of the authors and do not necessarily reflect
the official policy or position of the Air Force, the Department of
Defense or the US Government. Support from GACR grant number 14-31783S
is gratefully acknowledged.
NR 27
TC 0
Z9 0
U1 6
U2 7
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 1469-7688
EI 1469-7696
J9 QUANT FINANC
JI Quant. Financ.
PD OCT 3
PY 2015
VL 15
IS 10
SI SI
BP 1705
EP 1726
DI 10.1080/14697688.2014.979222
PG 22
WC Business, Finance; Economics; Mathematics, Interdisciplinary
Applications; Social Sciences, Mathematical Methods
SC Business & Economics; Mathematics; Mathematical Methods In Social
Sciences
GA CR5HW
UT WOS:000361372800001
ER
PT J
AU Carroll, M
Cook, K
Shaak, T
AF Carroll, Matthew
Cook, Kristen
Shaak, Thomas
TI Genomic Sequencing of Uric Acid Metabolizing and Clearing Genes in
Relationship to Xanthine Oxidase Inhibitor Dose
SO ARTHRITIS & RHEUMATOLOGY
LA English
DT Meeting Abstract
C1 [Carroll, Matthew] Keesler Med Ctr, Rheumatol, Keesler AFB, MS USA.
[Cook, Kristen] Keesler Med Ctr, Internal Med, Keesler AFB, MS USA.
[Shaak, Thomas] USAF, Keesler Med Ctr, Clin Res Lab, Keesler AFB, MS USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2326-5191
EI 2326-5205
J9 ARTHRITIS RHEUMATOL
JI Arthritis Rheumatol.
PD OCT
PY 2015
VL 67
SU 10
MA 97
PG 2
WC Rheumatology
SC Rheumatology
GA DE8BG
UT WOS:000370860201095
ER
PT J
AU Liu, J
Cui, GL
Li, HB
Himed, B
AF Liu, Jun
Cui, Guolong
Li, Hongbin
Himed, Braham
TI On the Performance of a Persymmetric Adaptive Matched Filter
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID PARTIALLY-HOMOGENEOUS ENVIRONMENT; SUBSPACE DETECTOR; TARGET DETECTION;
RADAR DETECTION; MIMO RADAR; ALGORITHM; PREDICTION; CLUTTER; GLRT
AB We examine the adaptive detection problem in the presence of colored noise with an unknown covariance matrix, by exploiting a persymmetric structure in the received signal. The persymmetric adaptive matched filter (PS-AMF) is used to address this problem, which can significantly alleviate the requirement of secondary data. In G. Pailloux et al. "Persymmetric adaptive radar detectors," (2011) the probability of false alarm of the PS-AMF has been obtained in terms of the Gaussian hypergeometric function. In this paper, finite-sum expressions for the probability of false alarm of the PS-AMF are derived, which are more convenient to use in calculating the detection threshold. Moreover, the detection probabilities of the PS-AMF for both nonfluctuating and fluctuating target models are derived. In the fluctuating model, the amplitude of the target echoes is described by a generalized Chi distribution that involves the Rayleigh distribution as a special case. These theoretical results are all confirmed using Monte Carlo (MC) simulations.
C1 [Liu, Jun] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China.
[Cui, Guolong] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 610054, Peoples R China.
[Li, Hongbin] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
[Himed, Braham] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Liu, J (reprint author), Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China.
EM hongbin.li@stevens.edu
NR 33
TC 4
Z9 4
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD OCT
PY 2015
VL 51
IS 4
BP 2605
EP 2614
DI 10.1109/TAES.2015.140633
PG 10
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DC1VO
UT WOS:000369006000008
ER
PT J
AU Sherrill, RE
Sinclair, AJ
Sinha, SC
Lovell, TA
AF Sherrill, Ryan E.
Sinclair, Andrew J.
Sinha, S. C.
Lovell, T. Alan
TI Lyapunov-Floquet Control of Satellite Relative Motion in Elliptic Orbits
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID FORMATION-FLYING SPACECRAFT; STATE TRANSITION MATRIX; FEEDBACK-CONTROL;
ELEMENTS; LAW
AB This paper proposes a method for continuous-thrust control of satellite formations in elliptic orbits. A previously calculated Lyapunov-Floquet transformation relates the linearized equations of relative motion for elliptic chief orbits to the Hill-Clohessy-Wiltshire equations describing circular chiefs. Using a control law based on Lyapunov-Floquet theory, a time-varying feedback gain is computed that drives a deputy satellite toward rendezvous with an elliptic chief. This control law stabilizes the relative motion across a wide range of chief eccentricities.
C1 [Sherrill, Ryan E.] Auburn Univ, Auburn, AL USA.
[Sinclair, Andrew J.] Auburn Univ, Aerosp Engn, Auburn, AL 36849 USA.
[Sinha, S. C.] Auburn Univ, Mech Engn, Auburn, AL 36849 USA.
[Lovell, T. Alan] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Sherrill, RE (reprint author), Engility Corp, 51 3rd St,Bldg 9, Shalimar, FL 32579 USA.
EM ryanesherrill@gmail.com
RI Sinclair, Andrew/H-2156-2013
NR 38
TC 0
Z9 0
U1 2
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD OCT
PY 2015
VL 51
IS 4
BP 2800
EP 2810
DI 10.1109/TAES.2015.140281
PG 11
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DC1VO
UT WOS:000369006000022
ER
PT J
AU Metcalf, JG
Sahin, C
Blunt, SD
Rangaswamy, M
AF Metcalf, Justin G.
Sahin, Cenk
Blunt, Shannon D.
Rangaswamy, Muralidhar
TI Analysis of Symbol-Design Strategies for Intrapulse Radar-Embedded
Communications
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
AB The design of communication symbols that may be embedded on an intrapulse basis into the backscatter generated by a high-power, pulsed radar is considered. This framework requires the asynchronous detection of transmitted symbols in a high-interference environment that degrades the capabilities of conventional intercept receivers. The impact of symbol design and filter structure upon the successful detection of covert symbols by the intended receiver and a hypothetical partially clairvoyant intercept receiver is examined.
C1 [Metcalf, Justin G.] Univ Kansas, Radar Syst & Remote Sensing Lab, Lawrence, KS 66045 USA.
[Metcalf, Justin G.] Air Force Res Lab, Sensors Directorate, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
[Sahin, Cenk] Univ Kansas, Elect Engn, Lawrence, KS 66045 USA.
[Blunt, Shannon D.] Univ Kansas, Dept Elect Engn & Comp Sci, Radar Syst & Remote Sensing Lab RSL, Lawrence, KS 66045 USA.
[Rangaswamy, Muralidhar] Air Force Res Lab, Sensors Directorate, RF Exploitat Branch, Radar Res, Wright Patterson AFB, OH 45433 USA.
RP Metcalf, JG (reprint author), Air Force Res Lab, Sensors Directorate, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM justin.metcalf@us.af.mil
FU Air Force Office of Scientific Research [FA9550-12-1-0220]
FX This work was supported by the Air Force Office of Scientific Research
under contract FA9550-12-1-0220.
NR 18
TC 3
Z9 3
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD OCT
PY 2015
VL 51
IS 4
BP 2914
EP 2931
DI 10.1109/TAES.2015.140675
PG 18
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DC1VO
UT WOS:000369006000031
ER
PT J
AU Huang, JQ
Christ, JA
Goltz, MN
Demond, AH
AF Huang, Junqi
Christ, John A.
Goltz, Mark N.
Demond, Avery H.
TI Modeling NAPL dissolution from pendular rings in idealized porous media
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID NONAQUEOUS PHASE LIQUID; SUBSURFACE TRANSPORT-PROPERTIES; ACID SOLUTION
CHEMISTRY; MASS-TRANSFER RATES; CAPILLARY-PRESSURE; INTERFACIAL AREA;
WETTABILITY; DNAPL; TETRACHLOROETHYLENE; SATURATION
AB The dissolution rate of nonaqueous phase liquid (NAPL) often governs the remediation time frame at subsurface hazardous waste sites. Most formulations for estimating this rate are empirical and assume that the NAPL is the nonwetting fluid. However, field evidence suggests that some waste sites might be organic wet. Thus, formulations that assume the NAPL is nonwetting may be inappropriate for estimating the rates of NAPL dissolution. An exact solution to the Young-Laplace equation, assuming NAPL resides as pendular rings around the contact points of porous media idealized as spherical particles in a hexagonal close packing arrangement, is presented in this work to provide a theoretical prediction for NAPL-water interfacial area. This analytic expression for interfacial area is then coupled with an exact solution to the advection-diffusion equation in a capillary tube assuming Hagen-Poiseuille flow to provide a theoretical means of calculating the mass transfer rate coefficient for dissolution at the NAPL-water interface in an organic-wet system. A comparison of the predictions from this theoretical model with predictions from empirically derived formulations from the literature for water-wet systems showed a consistent range of values for the mass transfer rate coefficient, despite the significant differences in model foundations (water wetting versus NAPL wetting, theoretical versus empirical). This finding implies that, under these system conditions, the important parameter is interfacial area, with a lesser role played by NAPL configuration.
C1 [Huang, Junqi] US EPA, Ground Water & Ecosyst Restorat Div, Natl Risk Management Res Lab, Ada, OK USA.
[Christ, John A.] US Air Force Acad, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
[Goltz, Mark N.] Air Force Inst Technol, Dept Syst Engn & Management, Wright Patterson AFB, OH USA.
[Demond, Avery H.] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA.
RP Huang, JQ (reprint author), US EPA, Ground Water & Ecosyst Restorat Div, Natl Risk Management Res Lab, Ada, OK USA.
EM huang.junqi@epa.gov
FU Strategic Environmental Research and Development Program (SERDP)
[ER-1737]
FX MATLAB (R) codes created for this analysis are available upon request by
email: huang.junqi@epa.gov. Portions of this research were supported by
the Strategic Environmental Research and Development Program (SERDP),
project ER-1737. The authors are grateful for the constructive comments
from the Editor and three anonymous reviewers. The content of this
manuscript has not been subject to agency review and does not
necessarily represent the view of the sponsoring agency. The views
expressed in this manuscript are those of the authors and do not reflect
the official policy or position of the United States Air Force,
Department of Defense, or the U.S. Government.
NR 40
TC 0
Z9 0
U1 6
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD OCT
PY 2015
VL 51
IS 10
BP 8182
EP 8197
DI 10.1002/2015WR016924
PG 16
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA DB3NM
UT WOS:000368418400020
ER
PT J
AU Morris, JD
Grimaila, MR
Hodson, DD
McLaughlin, CV
Jacques, DR
AF Morris, Jeffrey D.
Grimaila, Michael R.
Hodson, Douglas D.
McLaughlin, Colin V.
Jacques, David R.
TI Using the Discrete Event System Specification to model Quantum Key
Distribution system components
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Conceptual modeling; Discrete Event Simulation; Discrete Event System
Specification; modeling and simulation; Quantum Key Distribution
ID SIMULATION; DEVS
AB In this paper, we present modeling a Quantum Key Distribution (QKD) system with its components using the Discrete Event System Specification (DEVS) formalism. The DEVS formalism assures the developed component models are composable and exhibit well-defined temporal behavior independent of the simulation environment. These attributes enable users to assemble a valid simulation using any collection of compatible components to represent complete QKD system architectures. To illustrate the approach, we introduce a prototypical "prepare and measure'' QKD system, decompose one of its subsystems, and present the detailed modeling of the subsystem using the DEVS formalism. The developed models are provably composable and exhibit behavior suitable for the intended analytic purpose, thus improving the validity of the simulation. Finally, we examine issues identified during the verification of the conceptual DEVS model and discuss the impact of these findings on implementing a hybrid QKD simulation framework.
C1 [Morris, Jeffrey D.; Grimaila, Michael R.; Hodson, Douglas D.; Jacques, David R.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[McLaughlin, Colin V.] Naval Res Lab, Washington, DC 20375 USA.
RP Grimaila, MR (reprint author), US Air Force, Inst Technol, AFIT ENV, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Michael.Grimaila@us.af.mil
NR 48
TC 1
Z9 1
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD OCT
PY 2015
VL 12
IS 4
SI SI
BP 457
EP 480
DI 10.1177/1548512914554404
PG 24
WC Engineering, Multidisciplinary
SC Engineering
GA DA1JC
UT WOS:000367551100009
ER
PT J
AU Sorensen, NT
Grimaila, MR
AF Sorensen, Nathaniel T.
Grimaila, Michael R.
TI Discrete Event Simulation of the quantum channel within a Quantum Key
Distribution system
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Quantum Key Distribution; modeling and simulation; Discrete Event
Simulation
AB Quantum Key Distribution (QKD) is a technology that offers the means for two geographically separated parties to create a shared, unconditionally secure, secret key. QKD is unique in its ability to detect any third-party eavesdropping on the key exchange. While QKD technology offers promise for securing military communications, QKD systems are built using non-ideal components that differ significantly from ideal theoretical implementations. For this reason, there is a need to accurately and efficiently model and simulate different QKD system configurations in order to evaluate their security and performance characteristics. In this paper, we examine two competing ways of modeling a quantum channel within a QKD system: one treats photon packets as wave packets and the other simply as particles with no regard to wave equations. The performance statistics of these simulation models, including speed, memory, and accuracy, are compared with the physical solution and each other to determine the optimal model for use in the specific context of modeling and simulation of QKD systems. The results reveal that the wave packet method, while being approximately 110 times slower than the particle method for modeling single photons, provides the most accurate simulation protocol required for modeling and simulation of QKD systems.
C1 [Sorensen, Nathaniel T.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[Grimaila, Michael R.] US Air Force, Inst Technol, CCR, Wright Patterson AFB, OH 45433 USA.
RP Grimaila, MR (reprint author), US Air Force, Inst Technol, AFIT ENV, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Michael.Grimaila@afit.edu
NR 16
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD OCT
PY 2015
VL 12
IS 4
SI SI
BP 481
EP 488
DI 10.1177/1548512915569743
PG 8
WC Engineering, Multidisciplinary
SC Engineering
GA DA1JC
UT WOS:000367551100010
ER
PT J
AU Mailloux, LO
Engle, RD
Grimaila, MR
Hodson, DD
Colombi, JM
McLaughlin, CV
AF Mailloux, L. O.
Engle, R. D.
Grimaila, M. R.
Hodson, D. D.
Colombi, J. M.
McLaughlin, C. V.
TI Modeling decoy state Quantum Key Distribution systems
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Quantum Key Distribution; decoy state protocol; model and simulation;
system security; system performance
ID CRYPTOGRAPHY; SECURITY
AB Quantum Key Distribution (QKD) is an innovative technology which exploits the laws of quantum physics to generate and distribute shared secret key for use in cryptographic devices. Quantum Key Distribution offers the advantage of 'unconditionally secure' key generation with the unique ability to detect eavesdropping on the key distribution channel and shows promise for high-security applications such as those found in banking, government, and military environments. However, Quantum Key Distribution is a nascent technology where realized systems suffer from implementation non-idealities, which may significantly impact system performance and security. In this article, we discuss the modeling of a decoy state enabled Quantum Key Distribution system built to study the impact of these practical limitations. Specifically, we present a thorough background on the decoy state protocol, detailed discussion of the modeled decoy state enabled Quantum Key Distribution system, and evidence for component and sub-system verification, as well as, multiple examples of system-level validation. Additionally, we bring attention to practical considerations associated with implementing the decoy state protocol security condition gained from these research activities.
C1 [Mailloux, L. O.; Engle, R. D.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Grimaila, M. R.] US Air Force, Inst Technol, Dept Syst Engn, Wright Patterson AFB, OH 45433 USA.
[Grimaila, M. R.] US Air Force, Inst Technol, CCR, Wright Patterson AFB, OH 45433 USA.
[Hodson, D. D.] US Air Force, Inst Technol, Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Colombi, J. M.] US Air Force, Inst Technol, Syst Engn, Wright Patterson AFB, OH 45433 USA.
[McLaughlin, C. V.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Mailloux, LO (reprint author), US Air Force, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM logan.mailloux@afit.edu
NR 49
TC 2
Z9 2
U1 0
U2 2
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD OCT
PY 2015
VL 12
IS 4
SI SI
BP 489
EP 506
DI 10.1177/1548512915588572
PG 18
WC Engineering, Multidisciplinary
SC Engineering
GA DA1JC
UT WOS:000367551100011
ER
PT J
AU Patnaik, AK
Roy, S
Gord, JR
AF Patnaik, Anil K.
Roy, Sukesh
Gord, James R.
TI Lineshape dependence of ultrafast saturation of absorption and
fluorescence
SO PHYSICA SCRIPTA
LA English
DT Article
DE ultrafast saturation; absorption; fluorescence; fs laser-matter
interaction; laser lineshape dependence
ID PULSES
AB Ultrafast saturation of signals from an optical process occurs when intense laser pulses, with the duration of the driving laser pulse shorter than the effective decay timescales, interact with the target system. Recently, it has been shown that such saturation is marked by transition from transient-absorption to the transient-gain regime, unlike in continuous-wave or long-duration excitations where saturation occurs once the underdamping regime is achieved. The threshold intensities of the drive pulse that drives the optical signal to saturate can be estimated by calculating the area of the pulse. We demonstrate that depending on the shape of the pulse, the saturation behavior differs. The lineshape dependence of ultrafast saturation of absorption and fluorescence is studied for a variety of pulse shapes. We demonstrate that the saturation threshold is lower for super-Gaussian pulses and almost an order of magnitude lower for sech pulses compared to a Gaussian pulse.
C1 [Patnaik, Anil K.; Gord, James R.] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Patnaik, Anil K.] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
[Roy, Sukesh] Spectral Energies LLC, Dayton, OH 45431 USA.
RP Patnaik, AK (reprint author), US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM anil.patnaik@wright.edu; roy.sukesh@gmail.com; james.gord@us.af.mil
FU US Air Force Research Laboratory [FA8650-12-C-2200]; US Air Force Office
of Scientific Research
FX Funding for this study was provided by the US Air Force Research
Laboratory (Contract No. FA8650-12-C-2200) and the US Air Force Office
of Scientific Research (Dr Enrique Parra, Program Manager).
NR 19
TC 1
Z9 1
U1 2
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD OCT
PY 2015
VL T165
AR 014031
DI 10.1088/0031-8949/2015/T165/014031
PG 6
WC Physics, Multidisciplinary
SC Physics
GA CZ9DB
UT WOS:000367396900033
ER
PT J
AU Schwertner, HA
Stankus, JJ
AF Schwertner, Harvey A.
Stankus, John J.
TI Characterization of the Fluorescent Spectra and Intensities of Various
Lignans: Application to HPLC Analysis with Fluorescent Detection
SO JOURNAL OF CHROMATOGRAPHIC SCIENCE
LA English
DT Article
ID CARDIOVASCULAR-DISEASE RISK; MAMMALIAN LIGNANS; SESAMUM-INDICUM;
IN-VITRO; SEED OIL; FLAXSEED; PRECURSORS; SESAMOLIN
AB There is considerable interest in dietary lignans since they have been shown to have antioxidant, estrogenic and lipid-lowering activity in humans. In this study, the fluorescent excitation and emission spectra of seven lignans were characterized and their relative fluorescent intensities compared. The lignans were found to have similar excitation (286.6 +/- 2.5 nm, X +/- SD) and emission (320.1 +/- 6.4 nm) maxima; however, their fluorescence intensities on a molar basis decreased in the following order: asarinin, sesamin, sesamolin, seco-isolariciresinol, seco-isolariciresinol diglucoside and matairesinol. Enterolactone, a mammalian lignan conversion product, and sesamol, an antioxidant found in sesame oil, also exhibited significant fluorescence excitation and emission intensities. A high-performance liquid chromatographic method using photodiode array (PDA) and fluorescent detection was developed for the analysis of the individual lignans. Analysis was performed on a reversed phase C-18 column with methanol-water (70: 30, v/v) as the mobile phase. With fluorescent detection, the limits of quantitation (LOQ) was 0.1 ng or 2.82 nmol for sesamin and asarinin, 2.70 nmol for sesamolin, 2.76 nmol for seco-isolariciresinol, 1.45 nmol for seco-isolariciresinol diglucoside, 2.79 nmol for matairesinol and 0.5 ng or 1.67 nmol for enterolactone. With PDA detection, the LOQ was a 1000-fold less sensitive than with fluorescent detection.
C1 [Schwertner, Harvey A.] Wilford Hall Ambulatory Surg Ctr, Clin Res, Lackland AFB, TX 78236 USA.
[Stankus, John J.] Univ Incarnate Word, Dept Chem & Biochem, San Antonio, TX 78209 USA.
RP Schwertner, HA (reprint author), Wilford Hall Ambulatory Surg Ctr, Clin Res, 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
EM harvey.schwertner@us.af.mil
NR 20
TC 1
Z9 1
U1 2
U2 4
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0021-9665
EI 1945-239X
J9 J CHROMATOGR SCI
JI J. Chromatogr. Sci.
PD OCT
PY 2015
VL 53
IS 9
BP 1481
EP 1484
DI 10.1093/chromsci/bmv041
PG 4
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA CY8AA
UT WOS:000366629600008
PM 25896657
ER
PT J
AU Selesnick, RS
AF Selesnick, R. S.
TI Measurement of inner radiation belt electrons with kinetic energy above
1MeV
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE radiation belt; inner zone; electrons
ID SLOT REGION; SOLAR; SAMPEX
AB Data from the Proton-Electron Telescope on the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) satellite, taken during 1992-2009, are analyzed for evidence of inner radiation belt electrons with kinetic energy E > 1MeV. It is found that most of the data from a detector combination with a nominal energy threshold of 1MeV were, in fact, caused by a chance coincidence response to lower energy electrons or high-energy protons. In particular, there was no detection of inner belt or slot region electrons above 1MeV following the 2003 Halloween storm injection, though they may have been present. However, by restricting data to a less-stable, low-altitude trapping region, a persistent presence of inner belt electrons in the energy range 1to 1.6MeV is demonstrated. Their soft, exponential energy spectra are consistent with extrapolation of lower energy measurements.
C1 [Selesnick, R. S.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
RP Selesnick, RS (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
EM richard.selesnick@us.af.mil
FU NASA [NNH14AX18I]; Air Force Research Laboratory under the Heliophysics
Guest Investigators Program
FX All data used in this study are available from the SAMPEX data center,
http://www.srl.caltech.edu/sampex/DataCenter. The author thanks J.M.
Albert, W.R. Johnston, X. Li, M.D. Looper, J.P. McCollough, and R.A.
Mewaldt for help with the data or comments on the manuscript. This work
was supported in part by NASA agreement NNH14AX18I with the Air Force
Research Laboratory under the Heliophysics Guest Investigators Program.
NR 25
TC 4
Z9 4
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD OCT
PY 2015
VL 120
IS 10
BP 8339
EP 8349
DI 10.1002/2015JA021387
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CY0ZI
UT WOS:000366135200013
ER
PT J
AU Deng, Y
Sheng, C
Su, YJ
Hairston, MR
Knipp, D
Huang, CY
Ober, D
Redmon, RJ
Coley, R
AF Deng, Yue
Sheng, Cheng
Su, Yi-Jiun
Hairston, Marc R.
Knipp, Delores
Huang, Cheryl Y.
Ober, Daniel
Redmon, Rob J.
Coley, Robin
TI Correlation between Poynting flux and soft electron precipitation in the
dayside polar cap boundary regions
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE cusp; Poynting flux; particle precipitation; coincide; Polar cap
boundary; dayside
ID PARTICLE-PRECIPITATION; LOW-ALTITUDE; CUSP; FIELD; IONOSPHERE; CHAMP;
LAYER
AB Observations have revealed large Poynting flux and soft electron precipitation around the cusp region, which have strong impacts on the polar ionosphere/thermosphere. Simulations also confirmed that Poynting flux and soft electron precipitation significantly change the neutral density and dynamics around the dayside polar cap boundary regions. However, no detailed study has been conducted to show if they should coincide with each other or not. Our analysis of Defense Meteorological Satellite Program (DMSP) satellite data reveals a complex correlation between them. Poynting flux and soft particle precipitation are coincident in some cases (match cases), but a clear displacement between them can also be identified in others (nonmatch cases). In the 29 cusp crossings from F13 we investigated, the ratio between nonmatch and match cases is close to 1:4. In nonmatch cases, the displacement between the Poynting flux enhancement and soft particle precipitation enhancement can be as large as 1 degrees in geomagnetic latitude.
C1 [Deng, Yue; Sheng, Cheng] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA.
[Su, Yi-Jiun; Huang, Cheryl Y.; Ober, Daniel] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM USA.
[Hairston, Marc R.; Coley, Robin] Univ Texas Dallas, Dept Phys, Richardson, TX 75230 USA.
[Knipp, Delores] Univ Colorado, Aerosp Engn Sci, Boulder, CO 80309 USA.
[Redmon, Rob J.] NOAA, Boulder, CO USA.
RP Deng, Y (reprint author), Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA.
EM yuedeng@uta.edu
OI Coley, William Robin/0000-0003-2047-0002; Hairston,
Marc/0000-0003-4524-4837
FU NSF [AGS0955629]; NASA [NNX13AD64G, NNX14AD46G]
FX This research at the University of Texas at Arlington was supported by
NSF through grant AGS0955629, NASA through grants NNX13AD64G and
NNX14AD46G. Please contact Marc R. Hairston (hairston@utdallas.edu) and
Yi-Jiun Su (yi-jiun.caton@us.af.mil) for DMSP ion convection
observations and Poynting flux used in this paper. The DMSP particle
detectors were designed by Dave Hardy of AFRL, and data obtained from
JHU/APL. We thank NASA Goddard Space Flight Center
(http://omniweb.gsfc.nasa.gov/) for providing the solar wind data.
NR 25
TC 1
Z9 1
U1 1
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD OCT
PY 2015
VL 120
IS 10
BP 9102
EP 9109
DI 10.1002/2015JA021075
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CY0ZI
UT WOS:000366135200067
PM 27812438
ER
PT J
AU Smith, KA
Vela, AE
Kochenderfer, MJ
Olson, WA
AF Smith, Kyle A.
Vela, Adan E.
Kochenderfer, Mykel J.
Olson, Wesley A.
TI Optimizing a Collision-Avoidance System for Closely Spaced Parallel
Operations
SO JOURNAL OF AEROSPACE INFORMATION SYSTEMS
LA English
DT Article
ID EFFICIENT GLOBAL OPTIMIZATION; BLACK-BOX FUNCTIONS; DECISION-MAKING;
COMPUTATIONAL EXPERIMENTS; SENSITIVITY-ANALYSIS; MODELS; DESIGN
AB The traffic alert and collision-avoidance system has been mandated worldwide to protect against aircraft midair collisions. One drawback of the current traffic alert and collision-avoidance system design is limited support for closely spaced parallel runway operations. The traffic alert and collision-avoidance system alerts, too frequently, leading pilots to often inhibit resolution advisories during approach. Research is underway on the Airborne Collision Avoidance System X, which is a next-generation collision-avoidance system that will support new surveillance systems and air traffic control procedures. The Airborne Collision Avoidance System X has been shown to outperform the traffic alert and collision-avoidance system for en route encounter scenarios. However, the design parameters that are tuned for the en route environment are not appropriate for closely spaced parallel landing operations. One concept to allow for closely spaced parallel landing operations is a procedure-specific mode of the logic that reduces the nuisance alert rate while still providing collision protection. This paper describes the application of surrogate modeling for the purpose of tuning Airborne Collision Avoidance System X for parallel landing operations. The performance of the tuned system is assessed using a data-driven blunder model and an operational performance model. The tuned Airborne Collision Avoidance System X logic is found to equal or outperform the traffic alert and collision-avoidance system for each model in terms of both safety and operational suitability.
C1 [Smith, Kyle A.; Vela, Adan E.; Kochenderfer, Mykel J.; Olson, Wesley A.] MIT, Lincoln Lab, Lexington, MA 02420 USA.
RP Smith, KA (reprint author), US Air Force, Seymour Johnson Air Force Base, Goldsboro, NC 27531 USA.
FU Federal Aviation Administration Traffic Alert and Collision-Avoidance
System Program Office under U.S. Air Force [AJM-233, FA8721-05-C-0002]
FX This work was sponsored by the Federal Aviation Administration Traffic
Alert and Collision-Avoidance System Program Office AJM-233 under U.S.
Air Force Contract number FA8721-05-C-0002, and we gratefully
acknowledge Neal Suchy for his leadership and support. The authors wish
to thank Jessica Holland, Dylan Asmar, James Chryssanthocopoulos, and
Tom Billingsley of Lincoln Laboratory, Massachusetts Institute of
Technology for their assistance and support in completing this work. The
authors are also grateful for the insights and continual support
provided by Chung Lee of the Georgia Institute of Technology. The views
expressed in this paper are those of the authors and do not reflect the
official policy or position of the U.S. Air Force, U.S. Department of
Defense, or the U.S. Government.
NR 35
TC 0
Z9 0
U1 0
U2 8
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 1940-3151
EI 2327-3097
J9 J AEROSP INFORM SYST
JI J. Aerosp. Inf. Syst.
PD OCT
PY 2015
VL 12
IS 10
BP 618
EP 633
DI 10.2514/1.I010352
PG 16
WC Engineering, Aerospace
SC Engineering
GA CX5NX
UT WOS:000365750000002
ER
PT J
AU Cash, MD
Biesecker, DA
Pizzo, V
de Koning, CA
Millward, G
Arge, CN
Henney, CJ
Odstrcil, D
AF Cash, M. D.
Biesecker, D. A.
Pizzo, V.
de Koning, C. A.
Millward, G.
Arge, C. N.
Henney, C. J.
Odstrcil, D.
TI Ensemble Modeling of the 23 July 2012 Coronal Mass Ejection
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
ID SOLAR-WIND; MAGNETIC FIELDS; WSA-ENLIL; CME; INTERPLANETARY;
PROPAGATION; MISSION; EVENT; SUN
AB On 23 July 2012 a significant and rapid coronal mass ejection (CME) was detected in situ by the Solar Terrestrial Relations Observatory (STEREO) A. This CME was unusual due to its extremely brief Sun-to-1 AU transit time of less than 21 h and its exceptionally high impact speed of 2246 km/s. If this CME had been Earth directed, it would have produced a significant geomagnetic storm with potentially serious consequences. To protect our ground-and space-based assets, there is a clear need to accurately forecast the arrival times of such events using realistic input parameters and models run in near real time. Using Wang-Sheely-Arge (WSA)-Enlil, the operational model currently employed at the NOAA Space Weather Prediction Center, we investigate the sensitivity of the 23 July CME event to model input parameters. Variations in the initial CME speed, angular width, and direction, as well as the ambient solar wind background, are investigated using an ensemble approach to study the effect on the predicted arrival time of the CME at STEREO A. Factors involved in the fast transit time of this large CME are discussed, and potential improvements to modeling such events with the WSA-Enlil model are presented.
C1 [Cash, M. D.; de Koning, C. A.; Millward, G.] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[Cash, M. D.; Biesecker, D. A.; Pizzo, V.; de Koning, C. A.; Millward, G.] Natl Ocean & Atmospher Adm, Space Weather Predict Ctr, Boulder, CO USA.
[Arge, C. N.; Henney, C. J.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Odstrcil, D.] George Mason Univ, Sch Phys Astron & Computat Sci, Fairfax, VA 22030 USA.
[Odstrcil, D.] NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD 20771 USA.
RP Cash, MD (reprint author), Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
EM michele.cash@noaa.gov
FU AFOSR [FA9550-14-1-0262]; AFRL; Air Force Office of Scientific Research
(AFOSR)
FX This work was supported by the AFOSR Young Investigator Program grant
FA9550-14-1-0262. SOHO coronagraph images were obtained from NASA's SOHO
Science Archive (http://sohowww.nascom.nasa.gov). The STEREO A
coronagraph images were obtained from NASA's STEREO Science Center Data
Archive (http://stereo-ssc.nascom.nasa.gov), and the STEREO A solar wind
plasma and magnetic field data were obtained from the PLASTIC Instrument
Data Page (http://fiji.sr.unh.edu). Source surface synoptic charts were
obtained from the Wilcox Solar Observatory website
(http://wso.stanford.edu/synsourcel.html). This work utilizes data
produced collaboratively between Air Force Research Laboratory (AFRL)
and the National Solar Observatory (NSO). The ADAPT model development is
supported by AFRL and Air Force Office of Scientific Research (AFOSR).
The input data utilized by ADAPT are obtained by NSO/NISP (NSO
Integrated Synoptic Program). NSO is operated by the Association of
Universities for Research in Astronomy (AURA), Inc., under a cooperative
agreement with the National Science Foundation (NSF). The GONG and ADAPT
maps used in this study can be found at ftp://gong2.nso.edu/oQR/bqs and
ftp://gong2.nso.edu/adapt/maps/special/Cash2015, respectively. The Enlil
solar wind model used to run all CME simulations presented in this work
is publicly accessible through the Community Coordinated Modeling Center
at http://ccmc.gsfc.nasa.gov/models.
NR 30
TC 5
Z9 5
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD OCT
PY 2015
VL 13
IS 10
BP 611
EP 625
DI 10.1002/2015SW001232
PG 15
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA CX0UX
UT WOS:000365413700003
ER
PT J
AU Kahler, SW
Ling, A
AF Kahler, S. W.
Ling, A.
TI Dynamic SEP event probability forecasts
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
ID PROTON EVENTS; SOLAR; PREDICTION; FLARES
AB The forecasting of solar energetic particle (SEP) event probabilities at Earth has been based primarily on the estimates of magnetic free energy in active regions and on the observations of peak fluxes and fluences of large (>= M2) solar X-ray flares. These forecasts are typically issued for the next 24 h or with no definite expiration time, which can be deficient for time-critical operations when no SEP event appears following a large X-ray flare. It is therefore important to decrease the event probability forecast with time as a SEP event fails to appear. We use the NOAA listing of major (>= 10 pfu) SEP events from 1976 to 2014 to plot the delay times from X-ray peaks to SEP threshold onsets as a function of solar source longitude. An algorithm is derived to decrease the SEP event probabilities with time when no event is observed to reach the 10 pfu threshold. In addition, we use known SEP event size distributions to modify probability forecasts when SEP intensity increases occur below the 10 pfu event threshold. An algorithm to provide a dynamic SEP event forecast, Pd, for both situations of SEP intensities following a large flare is derived.
C1 [Kahler, S. W.] Kirtland AFB, Air Force Res Lab, Albuquerque, NM 87116 USA.
[Ling, A.] Atmospher Environm Res, Albuquerque, NM USA.
RP Kahler, SW (reprint author), Kirtland AFB, Air Force Res Lab, Albuquerque, NM 87116 USA.
EM stephen.kahler@kirtland.af.mil
FU AFOSR [15RVCOR167]; AFRL [FA9453-12-C-0231]
FX S. Kahler was funded by AFOSR Task 15RVCOR167. A. Ling was supported by
AFRL contract FA9453-12-C-0231. CME data were taken from the CDAW LASCO
catalog. This CME catalog is generated and maintained at the CDAW Data
Center by NASA and The Catholic University of America in cooperation
with the Naval Research Laboratory. SOHO is a project of international
cooperation between ESA and NASA.
NR 26
TC 1
Z9 1
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD OCT
PY 2015
VL 13
IS 10
BP 665
EP 675
DI 10.1002/2015SW001222
PG 11
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA CX0UX
UT WOS:000365413700007
ER
PT J
AU Mastroianni, GR
AF Mastroianni, George R.
TI Obedience in perspective: Psychology and the Holocaust
SO THEORY & PSYCHOLOGY
LA English
DT Article
DE genocide; Holocaust; Milgram; obedience; situationism
ID THOUGHTS
AB Stanley Milgram's explanation of the Holocaust in terms of the mechanism of obedience is too narrow. While obedience was one mechanism which contributed to the outcome, the murder of Jews and others was the work of people from a broad swath of German society, from economists who planned mass starvation to ordinary soldiers in the Wehrmacht, often acting without duress or apparent pressures to conform. Psychologists should not ask why? the Holocaust occurred, but how? Much behavior of perpetrators, bystanders, victims, and instigators can be understood as the consequence of normal mechanisms of perception, learning, socialization, and development. What made genocide possible was not the transitory conditions created in a lab in a few hours but a complex of mechanisms that are the product of generations of human experience and of elaborate rational, emotional, and logical justifications. This requires a more complex future psychology than the narrow focus on situationist obedience.
C1 [Mastroianni, George R.] US Air Force Acad, Psychol, Colorado Springs, CO 80840 USA.
RP Mastroianni, GR (reprint author), US Air Force Acad, Dept Behav Sci & Leadership, DFBL, Colorado Springs, CO 80840 USA.
EM george.mastroianni@usafa.edu
NR 32
TC 4
Z9 4
U1 10
U2 23
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0959-3543
EI 1461-7447
J9 THEOR PSYCHOL
JI Theory Psychol.
PD OCT
PY 2015
VL 25
IS 5
BP 657
EP 669
DI 10.1177/0959354315608963
PG 13
WC Psychology, Multidisciplinary
SC Psychology
GA CW4MX
UT WOS:000364966800007
ER
PT J
AU Deshmukh, R
Culler, AJ
Miller, BA
McNamara, JJ
AF Deshmukh, Rohit
Culler, Adam J.
Miller, Brent A.
McNamara, Jack J.
TI Response of skin panels to combined self- and boundary layer-induced
fluctuating pressure
SO JOURNAL OF FLUIDS AND STRUCTURES
LA English
DT Article
DE Panel flutter; Fluid-thermal-structural interaction;
Aerothermoelasticity; Turbulence
ID FLOW; PREDICTION; MODELS; IMPACT; LOADS
AB Fluctuating pressures are a critical consideration in the life-prediction of thin-gauge hot-structures operating in high-speed flow. Sources include both boundary layer turbulence and self-induced components, where the latter arises from panel vibrations. While a considerable body of research is available for the structural response of thin-gauge panels to self-induced pressure fluctuations, the response to boundary layer turbulence is not well-understood due to the complexity in modeling the loads. Important open issues are the degree of coupling between the boundary layer induced fluctuating loads and the thermo-structural response, and also the potential for interactions between a turbulent boundary layer and structural response to result in structural instabilities. This study seeks to address these issues by incorporating a phenomenological model for turbulent boundary layer loads into an aerothermoelastic framework. The enhanced aerothermoelastic model is then used to study the combined effect of self- and boundary layer-induced fluctuating pressures on responses of simple panels, and to characterize features in the turbulent boundary layer loads that can lead to large amplitude structural vibrations. The developed phenomenological model predicts that the magnitude of the boundary layer induced fluctuating pressure increases with increasing panel inclination, and decreases with increasing temperature. Furthermore, it is found that both RMS magnitude and phase angle of the boundary layer induced pressure loads play key roles in panel response. Certain combinations of these features, coupled with the self-induced pressure fluctuations, are found to cause onset of fluid-structural instabilities earlier than observed when pressure fluctuations from the turbulent boundary layer are either neglected or decoupled from the panel response. (c) 2015 Published by Elsevier
C1 [Deshmukh, Rohit; Miller, Brent A.; McNamara, Jack J.] Ohio State Univ, Mech & Aerosp Engn, Columbus, OH 43210 USA.
[Culler, Adam J.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP McNamara, JJ (reprint author), Ohio State Univ, Mech & Aerosp Engn, E440 Scott Lab,201 W 19th Ave, Columbus, OH 43210 USA.
EM mcnamara.190@osu.edu
FU AFOSR [FA9550-11-1-0036]; Short Term Aerospace Research & Development
Program (STAR-DP) [FA8650-10-D-3037]; DoD Science Mathematics and
Research for Transformation (SMART) Scholarship
FX This work is supported in part by AFOSR Grant FA9550-11-1-0036, with Dr.
John Schmissuer as Program Manager, the Short Term Aerospace Research &
Development Program (STAR-DP, contract number FA8650-10-D-3037), DoD
Science Mathematics and Research for Transformation (SMART) Scholarship,
and an allocation of computing time from the Ohio Super Computer Center.
The authors thank Ms. Mbu Waindim and Dr. Datta Gaitonde, Mechanical &
Aerospace Engineering, The Ohio State University for providing LES data.
The authors also acknowledge the invaluable technical insights of the
AFRL/RQ Structural Sciences Center, under the directorship of Dr. Ravi
Chona. The authors also thank Mr. Christopher McClurg, Mechanical &
Aerospace Engineering, The Ohio State University for helping with the
study of sensitivity of panel response to magnitude of the TBL loads.
Finally, the views and conclusions contained herein are those of the
authors and should not be interpreted as necessarily representing the
official policies or endorsements, either expressed or implied, of the
AFOSR or the U.S. Government.
NR 43
TC 3
Z9 3
U1 1
U2 2
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0889-9746
J9 J FLUID STRUCT
JI J. Fluids Struct.
PD OCT
PY 2015
VL 58
BP 216
EP 235
DI 10.1016/j.jfluidstructs.2015.08.008
PG 20
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA CV4PE
UT WOS:000364248200014
ER
PT J
AU DelRaso, NJ
Chan, VT
Mauzy, CA
Shiyanov, PA
AF DelRaso, Nicholas J.
Chan, Victor T.
Mauzy, Camilla A.
Shiyanov, Pavel A.
TI Air Force Research Laboratory Integrated Omics Research
SO MILITARY MEDICINE
LA English
DT Article
ID JET FUEL JP-8; PATTERN-RECOGNITION; MASS-SPECTROMETRY; QUANTITATIVE
PROTEOMICS; LIQUID-CHROMATOGRAPHY; MAGNETIC-RESONANCE; URINARY
BIOMARKERS; ISOBARIC TAGS; NMR; EXPOSURE
AB Integrated Omics research capabilities within the Air Force Research Laboratory began in 2003 with the initiation of a Defense Technology Objective project aimed to identify biomarkers of toxicity occurring within the warfighter as a preclinical indicator. Current methods for determining toxic exposures are not responsive enough or created available for deployment to prevent serious health effects. Using Integrated Omics (Genomics/Epigenetics, Proteomics, and Metabonomics) for biomarker discovery, we have identified specific molecular markers which, once validated, could be used for real-time or near-real-time monitoring of the human response to uncharacterized exposures. The determination and use of validated biomarker sets, when installed on a fieldable biomonitor system, could allow fast determination of subclinical organ damage in response to chemical exposures. Since initiation of this program, our group has applied Omics technologies for biomarker discovery in a number of toxicology and human performance projects, including jet fuel exposures and cognitive fatigue.
C1 [DelRaso, Nicholas J.; Chan, Victor T.; Mauzy, Camilla A.; Shiyanov, Pavel A.] Air Force Res Lab, Human Effectiveness Directorate, Bioeffects Div,Human Performance Wing 711, Mol Bioeffects Branch RHDJ, Wright Patterson AFB, OH 45433 USA.
RP DelRaso, NJ (reprint author), Air Force Res Lab, Human Effectiveness Directorate, Bioeffects Div,Human Performance Wing 711, Mol Bioeffects Branch RHDJ, Bldg 837,2729 R St, Wright Patterson AFB, OH 45433 USA.
NR 54
TC 1
Z9 1
U1 0
U2 8
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD OCT
PY 2015
VL 180
IS 10
SU S
BP 67
EP 75
DI 10.7205/MILMED-D-15-00051
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA CV9UW
UT WOS:000364633800010
PM 26444894
ER
PT J
AU True, MW
Strickland, LE
Lewi, JE
Sterling, LM
Dai, HB
Haas, RW
Sylvia, VL
AF True, Mark W.
Strickland, Lisa E.
Lewi, Jack E.
Sterling, Laura M.
Dai, Houbei
Haas, Roy W.
Sylvia, Victor L.
TI Impact of a Diabetes Risk Score on Lifestyle Education and Patient
Adherence (IDEA) in Prediabetes: A Multisite Randomized Controlled Trial
SO MILITARY MEDICINE
LA English
DT Article
ID DIETARY SELF-CARE; PREVENTION PROGRAM; WEIGHT-LOSS; INTERVENTION;
POPULATION; MOTIVATION; BEHAVIOR; ADULTS; MODEL
AB Background: To evaluate whether knowledge of a personalized Diabetes Risk Score (DRS) improved performance in a 12-week lifestyle change program for prediabetes. Methods: Randomized subjects at four clinics provided samples for a DRS at baseline, 12, and 24 weeks. The intervention group received scores at each point, whereas the control group only received this information at 12 and 24 weeks. Outcomes included attendance and changes in weight, abdominal circumference, blood pressure, fasting glucose, hemoglobin A1c, cholesterol, and risk score. Results: Baseline characteristics were similar in the groups (n = 192) and within risk-stratified subgroups. At 12 weeks, there were no differences in outcomes, with mean weight loss of 4.61 kg in the intervention group and 4.43 kg in the control group (p = 0.79). Both groups were given 12-week risk scores, with previously unseen baseline scores for the control group. The control group continued to lose additional weight (1.21 kg) by 24 weeks, whereas the intervention group regained previously lost weight (0.33 kg) (p = 0.04). Conclusions: The knowledge of a single baseline personalized DRS did not affect performance in a lifestyle modification program. However, the knowledge of an improvement in risk score, and the timing of this information, may impact further adherence.
C1 [True, Mark W.; Strickland, Lisa E.; Sterling, Laura M.; Dai, Houbei] Air Force Diabet Ctr Excellence, Med Wing 59, Lackland AFB, TX 78236 USA.
[Lewi, Jack E.] San Antonio Mil Med Ctr, Serv Endocrinol, Ft Sam Houston, TX 78234 USA.
[Haas, Roy W.; Sylvia, Victor L.] 59th Med Wing Sci Technol Div, Lackland AFB, TX 78236 USA.
RP True, MW (reprint author), Air Force Diabet Ctr Excellence, Med Wing 59, 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
NR 18
TC 0
Z9 0
U1 1
U2 2
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD OCT
PY 2015
VL 180
IS 10
BP 1091
EP 1097
DI 10.7205/MILMED-D-14-00656
PG 7
WC Medicine, General & Internal
SC General & Internal Medicine
GA CV9UP
UT WOS:000364632900022
PM 26444473
ER
PT J
AU Demidov, VI
Adams, SF
Kaganovich, ID
Koepke, ME
Kurlyandskaya, IP
AF Demidov, V. I.
Adams, S. F.
Kaganovich, I. D.
Koepke, M. E.
Kurlyandskaya, I. P.
TI Measurements of low-energy electron reflection at a plasma boundary
SO PHYSICS OF PLASMAS
LA English
DT Article
ID EMISSION; PROBE
AB It is demonstrated that low-energy (< 3 eV) electron reflection from a solid surface in contact with a low-temperature plasma can have significant variation with time. An uncontaminated, i.e., "clean," metallic surface (just after heating up to glow) in a plasma environment may have practically no reflection of low-energy incident electrons. However, a contaminated, i.e., "dirty," surface (in some time after cleaning by heating) that has a few monolayers of absorbent can reflect low-energy incident electrons and therefore significantly affect the net electron current collected by the surface. This effect may significantly change plasma properties and should be taken into account in plasma experiments and models. A diagnostic method is demonstrated for measurements of low-energy electron absorption coefficient in plasmas with a mono-energetic electron group. (C) 2015 AIP Publishing LLC.
C1 [Demidov, V. I.; Adams, S. F.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Demidov, V. I.; Koepke, M. E.] W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
[Kaganovich, I. D.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Kurlyandskaya, I. P.] St Petersburg State Univ, Dept Opt & Spect, St Petersburg 199034, Russia.
[Kurlyandskaya, I. P.] ITMO Univ, Int Lab Nonlocal Plasma Nanotechnol & Med, St Petersburg 197101, Russia.
RP Demidov, VI (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM vladimir.demidov@mail.wvu.edu
RI Demidov, Vladimir/A-4247-2013; Kurlyandskaya, Iya/S-3911-2016
OI Demidov, Vladimir/0000-0002-2672-7684; Kurlyandskaya,
Iya/0000-0002-4592-1730
FU AFOSR; NSF Grant [PHY-1301896]; SPbGU [11.38.658.2013]; ITMO University
[713577]
FX A part of this research was performed, while one of the authors (V.I.D.)
held a National Research Council Research Associateship Award at AFRL.
The work of I.D.K. was supported by AFOSR. The work of M.E.K. was
supported by NSF Grant No. PHY-1301896. The work of I.P.K. was supported
by SPbGU (Grant No. 11.38.658.2013) and ITMO University (Grant No.
713577).
NR 22
TC 3
Z9 3
U1 4
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD OCT
PY 2015
VL 22
IS 10
AR 104501
DI 10.1063/1.4933002
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA CV6TL
UT WOS:000364403600126
ER
PT J
AU Easterling, E
Hunninghake, J
Gancayco, J
AF Easterling, Ellis
Hunninghake, John
Gancayco, John
TI A Rare Case of Microscopic Colitis After Revascularization of Mesenteric
Artery Stenosis
SO AMERICAN JOURNAL OF GASTROENTEROLOGY
LA English
DT Meeting Abstract
CT 80th Annual Scientific Meeting of the
American-College-of-Gastroenterology
CY OCT 16-21, 2015
CL Honolulu, HI
SP Amer Coll Gastroenterol
C1 [Easterling, Ellis] US Air Force, San Antonio, TX USA.
[Hunninghake, John] US Air Force, San Antonio Mil Med Ctr, San Antonio, TX USA.
[Gancayco, John] US Air Force, JBSA, Ft Sam Houston, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0002-9270
EI 1572-0241
J9 AM J GASTROENTEROL
JI Am. J. Gastroenterol.
PD OCT
PY 2015
VL 110
SU 1
MA 349
BP S153
EP S153
PG 1
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA CU7KO
UT WOS:000363715900350
ER
PT J
AU Hunninghake, J
Murray, B
Manibusan, PA
McNear, S
Gancayco, J
AF Hunninghake, John
Murray, Brian
Manibusan, Pedro A., Jr.
McNear, Scott
Gancayco, John
TI Acute Ischemic Colitis and Portal Vein Thrombosis in a Young Female
Smoker on an Oral Contraceptive
SO AMERICAN JOURNAL OF GASTROENTEROLOGY
LA English
DT Meeting Abstract
CT 80th Annual Scientific Meeting of the
American-College-of-Gastroenterology
CY OCT 16-21, 2015
CL Honolulu, HI
SP Amer Coll Gastroenterol
C1 [Hunninghake, John] US Air Force, San Antonio Mil Med Ctr, San Antonio, TX USA.
[Murray, Brian] San Antonio Mil Med Ctr, San Antonio, TX USA.
[Manibusan, Pedro A., Jr.] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
[McNear, Scott] San Antonio Mil Med Ctr, Jbsa Ft Sam Houston, TX USA.
[Gancayco, John] US Air Force, Jbsa Ft Sam Houston, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0002-9270
EI 1572-0241
J9 AM J GASTROENTEROL
JI Am. J. Gastroenterol.
PD OCT
PY 2015
VL 110
SU 1
MA 400
BP S173
EP S173
PG 1
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA CU7KO
UT WOS:000363715900401
ER
PT J
AU Okolo, W
Dogan, A
Blake, W
AF Okolo, Wendy
Dogan, Atilla
Blake, William
TI Alternate Trimming Methods for Trailing Aircraft in Formation Flight
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
C1 [Okolo, Wendy; Dogan, Atilla] Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
[Blake, William] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Okolo, W (reprint author), Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
FU U.S. Air Force Research Laboratory, Air Vehicles Directorate; National
Defense Science and Engineering Graduate Fellowship; Amelia Earhart
Fellowship; NASA/Texas Space Grant Consortium Fellowship Programs
FX We would like to acknowledge the support of the U.S. Air Force Research
Laboratory, Air Vehicles Directorate for this research. Atilla Dogan was
supported as a Summer Faculty Researcher and Wendy Okolo was supported
as a Summer Graduate Student Researcher in the Control Design and
Analysis Branch in the summer of 2012, when the prior work of this
research was performed. Wendy Okolo would also like to acknowledge the
support of the National Defense Science and Engineering Graduate
Fellowship, the Amelia Earhart Fellowship, and the NASA/Texas Space
Grant Consortium Fellowship Programs.
NR 10
TC 0
Z9 0
U1 2
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD OCT
PY 2015
VL 38
IS 10
BP 2018
EP 2024
DI 10.2514/1.G000574
PG 7
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CV4KL
UT WOS:000364235600016
ER
PT J
AU Tippets, RD
Wakefield, S
Young, S
Ferguson, I
Earp-Pitkins, C
Chun, FK
AF Tippets, Roger D.
Wakefield, Stephen
Young, Shannon
Ferguson, Ian
Earp-Pitkins, Christopher
Chun, Francis K.
TI Slitless spectroscopy of geosynchronous satellites
SO OPTICAL ENGINEERING
LA English
DT Article
DE space situational awareness; slitless spectroscopy; satellite
characterization
AB A preliminary investigation into the use of slitless spectroscopy for characterization of geosynchronous satellites is described. A 100 line/mm diffraction grating is used as the dispersing device, and the spectral data obtained are compared to a model with good results. A method used to collect and calibrate slitless spectral observations accounting for pixel to wavelength conversion, pixel response as a function of wavelength, and solar features is presented. Observations of several geosynchronous satellites throughout a night reveal reflectance with noticeable and different profiles indicating that slitless spectroscopy offers the potential for another modality for identifying and discriminating satellites. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Tippets, Roger D.; Wakefield, Stephen; Young, Shannon; Ferguson, Ian; Earp-Pitkins, Christopher; Chun, Francis K.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Tippets, RD (reprint author), US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
EM roger.tippets.ctr@usafa.edu
FU Air Force Office of Scientific Research
FX We acknowledge the support of the Air Force Office of Scientific
Research. Additionally, this paper is a result of two senior capstone
projects in the Department of Physics at the United States Air Force
Academy. Finally, the authors thank the reviewers for their comments and
recommendations.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD OCT
PY 2015
VL 54
IS 10
AR 104103
DI 10.1117/1.OE.54.10.104103
PG 7
WC Optics
SC Optics
GA CV4EW
UT WOS:000364220200018
ER
PT J
AU Pandey, R
Farmer, B
AF Pandey, Ras
Farmer, Barry
TI Can the structure of a protein (H3.1) depend on the treatment of a
solvent medium (explicit vs effective) in a coarse-grained computer
simulation?
SO PROTEIN SCIENCE
LA English
DT Meeting Abstract
CT 29th Annual Symposium of the Protein-Society
CY JUL 22-25, 2015
CL Barcelona, SPAIN
SP Prot Soc
C1 [Pandey, Ras] Univ So Mississippi, Hattiesburg, MS 39406 USA.
[Farmer, Barry] Air Force Res Lab, New York, NY USA.
NR 0
TC 0
Z9 0
U1 2
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0961-8368
EI 1469-896X
J9 PROTEIN SCI
JI Protein Sci.
PD OCT
PY 2015
VL 24
SU 1
SI SI
MA PD-014
BP 79
EP 80
PG 2
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA CU6QS
UT WOS:000363658100132
ER
PT J
AU Pandey, R
Mirau, P
Farmer, B
AF Pandey, Ras
Mirau, Peter
Farmer, Barry
TI Self-organizing structures of alpha-synulceins and its aggregates by a
coarse-grained Monte Carlo simulation
SO PROTEIN SCIENCE
LA English
DT Meeting Abstract
CT 29th Annual Symposium of the Protein-Society
CY JUL 22-25, 2015
CL Barcelona, SPAIN
SP Prot Soc
C1 [Pandey, Ras] Univ So Mississippi, Hattiesburg, MS 39406 USA.
[Mirau, Peter; Farmer, Barry] Air Force Res Lab, Wright Patterson AFB, OH USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0961-8368
EI 1469-896X
J9 PROTEIN SCI
JI Protein Sci.
PD OCT
PY 2015
VL 24
SU 1
SI SI
MA PF-017
BP 128
EP 129
PG 2
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA CU6QS
UT WOS:000363658100219
ER
PT J
AU Eigenbrodt, BC
Young, AM
Howell, TG
Segre, CU
Reitz, TL
AF Eigenbrodt, Bryan C.
Young, Anthony M.
Howell, Thomas G.
Segre, Carlo U.
Reitz, Thomas L.
TI High-Temperature, In Situ X-ray Absorption Study of Sr2MgMoO6
Solid-Oxide Fuel-Cell Anode Materials
SO CHEMELECTROCHEM
LA English
DT Article
DE electrochemical impedance spectroscopy; fuel cells; linear-sweep
voltammetry; perovskites; X-ray absorption spectroscopy
ID YTTRIA-STABILIZED ZIRCONIA; 3-PHASE BOUNDARY LENGTH; NI PATTERN ANODES;
3-PHASE-BOUNDARY DYNAMICS; RAMAN-SPECTROSCOPY; CERMET ANODES; IMPEDANCE;
CONDUCTIVITY; ELECTRODES; INTERFACE
AB Limitations of current solid oxide fuel cell anode materials have spurred the exploration of alternative materials. Mixed ionic and electronic conducting anode materials have the potential to overcome these limitations. The mixed ionic and electronic conducting material explored in this work is Sr2MgMoO6 (SMMO). X-ray absorption spectroscopy in conjunction with an insitu assembly was used to study the fundamental redox chemistry of SMMO at 800 degrees C. The X-ray absorption spectra for the Mo K-edge exhibited changes in the reduced and oxidized bulk SMMO samples, as evident in a shift in the Mo binding energies and in the formation of oxide vacancies. However, insitu measurements of the working devices revealed that the Mo oxidation state remained unchanged under various cell polarizations. These findings demonstrate that SMMO, as a solid oxide fuel cell anode, has the potential to provide adequate electron conduction through multivalent Mo sites and to provide fuel tolerance through oxide vacancies built into its crystal structure.
C1 [Eigenbrodt, Bryan C.] Villanova Univ, Dept Chem, Villanova, PA 19085 USA.
[Young, Anthony M.; Howell, Thomas G.; Reitz, Thomas L.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Segre, Carlo U.] IIT, Dept Phys, Chicago, IL 60616 USA.
[Segre, Carlo U.] IIT, CSRRI, Chicago, IL 60616 USA.
RP Eigenbrodt, BC (reprint author), Villanova Univ, Dept Chem, 800 E Lancaster Ave, Villanova, PA 19085 USA.
EM bryan.eigenbrodt@villanova.edu
RI Segre, Carlo/B-1548-2009; ID, MRCAT/G-7586-2011
OI Segre, Carlo/0000-0001-7664-1574;
FU National Academies of Sciences through Research Associateship Program;
Air Force Research Laboratory; Wright-Patterson Air Force Base
FX This research was supported by the National Academies of Sciences
through the Research Associateship Program. Funding for this research
was provided through the Air Force Research Laboratory, Wright-Patterson
Air Force Base. Access to the 10-ID beamline at the Advanced Photon
Source located at Argonne National Laboratory was granted through
proposal GUP-28614. MRCAT operations are supported by the Department of
Energy and the Materials Research Collaborative Access Team (MRCAT)
member institutions.
NR 42
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U1 2
U2 19
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 2196-0216
J9 CHEMELECTROCHEM
JI ChemElectroChem
PD OCT
PY 2015
VL 2
IS 10
SI SI
BP 1568
EP 1575
DI 10.1002/celc.201500122
PG 8
WC Electrochemistry
SC Electrochemistry
GA CU2EP
UT WOS:000363336500017
ER
PT J
AU Mailloux, LO
Grimaila, MR
Colombi, JM
Hodson, DD
Engle, RD
McLaughlin, CV
Baumgartner, G
AF Mailloux, Logan O.
Grimaila, Michael R.
Colombi, John M.
Hodson, Douglas D.
Engle, Ryan D.
McLaughlin, Colin V.
Baumgartner, Gerald
TI Quantum Key Distribution: Examination of the Decoy State Protocol
SO IEEE COMMUNICATIONS MAGAZINE
LA English
DT Article
ID SECURITY
AB Quantum key distribution (QKD) is an innovative technology that exploits the laws of quantum mechanics to generate and distribute a shared cryptographic key for secure communications. The unique nature of QKD ensures that eavesdropping on quantum communications necessarily introduces detectable errors which is desirable for high-security environments. QKD systems have been demonstrated in both freespace and optical fiber configurations, gaining global interest from national laboratories, commercial entities, and the U.S. Department of Defense. However, QKD is a nascent technology where realized systems are constructed from non-ideal components, which can significantly impact system performance and security. In this article, we describe QKD technology as part of a secure communications solution and identify vulnerabilities associated with practical network architectures. In particular, we examine the performance of decoy state enabled QKD systems against a modeled photon number splitting attack and suggest an improvement to the decoy state protocol security condition that does not assume a priori knowledge of the QKD channel efficiency.
C1 [Mailloux, Logan O.; Grimaila, Michael R.; Colombi, John M.; Hodson, Douglas D.; Engle, Ryan D.] US Air Force, Inst Technol, New York, NY USA.
[McLaughlin, Colin V.] Naval Res Lab, New York, NY USA.
[Baumgartner, Gerald] Lab Telecommun Sci, College Pk, MD USA.
RP Mailloux, LO (reprint author), US Air Force, Inst Technol, New York, NY USA.
EM Logan.Mailloux@afit.edu; Michael.Grimaila@afit.edu
FU Laboratory for Telecommunication Sciences [5743400-304-6448]
FX This work was supported by the Laboratory for Telecommunication Sciences
[grant number 5743400-304-6448]. This work was supported in part by a
grant of computer time from the DoD High Performance Computing
Modernization Program at the Air Force Research Laboratory,
Wright-Patterson AFB, Ohio.
NR 21
TC 2
Z9 2
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0163-6804
EI 1558-1896
J9 IEEE COMMUN MAG
JI IEEE Commun. Mag.
PD OCT
PY 2015
VL 53
IS 10
BP 24
EP 31
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CU0YU
UT WOS:000363246200003
ER
PT J
AU Gao, X
Sui, C
Hemmady, S
Rivera, J
Yakura, SJ
Pommerenke, D
Patnaik, A
Beetner, DG
AF Gao, Xu
Sui, Chunchun
Hemmady, Sameer
Rivera, Joey
Yakura, Susumu Joe
Pommerenke, David
Patnaik, Abhishek
Beetner, Daryl G.
TI Modeling Static Delay Variations in Push-Pull CMOS Digital Logic
Circuits Due to Electrical Disturbances in the Power Supply
SO IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
LA English
DT Article
DE CMOS integrated circuits (ICs); delay estimation; electromagnetic
interference; electromagnetic transients; immunity; modeling
ID CLOCK-DATA COMPENSATION; NOISE; IMPACT; ICS
AB Soft errors can occur in digital integrated circuits (ICs) as a result of an electromagnetic disturbance, such as might result from an electrical fast transient (EFT). Many soft errors come from changes in propagation delays through digital logic, which are caused by changes in the on-die power supply voltage. An analytical model was developed to predict timing variations in digital logic as a result of variations in the power supply voltage. The derivation of the analytical delay model is reported. The model was validated experimentally by applying EFTs to a ring oscillator built in a test IC. The predicted and measured ring oscillator frequencies (or periods) agreed within a relative error of less than 2.0%. To further validate the approach, the model was applied to test the response of more complex circuits consisting of NAND/NOR logic gates, binary adders, dynamic logic gates, and transmission gates. The circuits were fabricated on a 0.5 mu m test IC and simulated on two additional process technologies (0.18 mu m and 45 nm). The model performed well in each case with a maximum relative error of 5.6%, verifying the applicability of the model for analyzing complex logic circuits within a variety of process technologies. The proposed delay model can be used by IC design engineers to predict and understand the change in the propagation delay through logic circuits due to the disturbed power supply.
C1 [Gao, Xu; Sui, Chunchun; Pommerenke, David; Patnaik, Abhishek; Beetner, Daryl G.] Missouri Univ Sci & Technol, EMC Lab, Rolla, MO 65409 USA.
[Hemmady, Sameer; Rivera, Joey] TechFlow Sci, Albuquerque, NM 87110 USA.
[Hemmady, Sameer] Univ New Mexico, Elect & Comp Engn, Albuquerque, NM 87106 USA.
[Yakura, Susumu Joe] Air Force Res Lab, Albuquerque, NM 87110 USA.
RP Gao, X (reprint author), Apple Inc, Cupertino, CA 95014 USA.
EM xg2z7@mst.edu; csdh8@mst.edu; shem-mady@techflow.com;
jrivera@techflow.com; davidjp@mst.edu; ap437@mst.edu; daryl@mst.edu
FU National Science Foundation (NSF) [0855878]
FX This work was supported in part by the National Science Foundation (NSF)
under Grant 0855878.
NR 22
TC 0
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U1 1
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9375
EI 1558-187X
J9 IEEE T ELECTROMAGN C
JI IEEE Trans. Electromagn. Compat.
PD OCT
PY 2015
VL 57
IS 5
BP 1179
EP 1187
DI 10.1109/TEMC.2015.2428272
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CU0EQ
UT WOS:000363189200031
ER
PT J
AU Zheng, DH
Witt, LA
Waite, E
David, EM
van Driel, M
McDonald, DP
Callison, KR
Crepeau, LJ
AF Zheng, Dianhan
Witt, L. A.
Waite, Eleanor
David, Emily M.
van Driel, Marinus
McDonald, Daniel P.
Callison, Kori R.
Crepeau, Loring J.
TI Effects of ethical leadership on emotional exhaustion in high moral
intensity situations
SO LEADERSHIP QUARTERLY
LA English
DT Article
DE Ethical leadership; Cohesion; Emotional exhaustion; Conscientiousness
ID 5-FACTOR MODEL; JOB-PERFORMANCE; METAANALYTIC EXAMINATION;
INTERACTIONIST MODEL; TEAM EFFECTIVENESS; DECISION-MAKING;
STRESS-DISORDER; GROUP POTENCY; WORK; BURNOUT
AB Emotional exhaustion is a threat to standard operations, particularly in organizations in which physical safety is at risk. High moral intensity is inherent in such organizations due to the magnitude of consequences associated with ethical/unethical conduct. The authors proposed a psychological process in which ethical leadership affects emotional exhaustion directly and indirectly through team cohesion. As military operational contexts typically are (or frequently have the potential to become) high moral intensity situations, the authors tested their model among 338 military personnel deployed in combat zones. They found that: (1) team cohesion partially mediated the relationship between ethical leadership and emotional exhaustion, and (2) this psychological process of direct and indirect effects of ethical leadership did not hold among individuals approaching the low end of conscientiousness. (C) 2015 Elsevier Inc. All rights reserved.
C1 [Zheng, Dianhan; Witt, L. A.; Waite, Eleanor] Univ Houston, Dept Psychol, Houston, TX 77204 USA.
[David, Emily M.] Zayed Univ, Coll Business, Dubai, U Arab Emirates.
[van Driel, Marinus] van Driel Consulting, Satellite Beach, FL 32937 USA.
[McDonald, Daniel P.; Crepeau, Loring J.] Def Equal Opportun Management Inst, Patrick AFB, FL 32925 USA.
[Callison, Kori R.] Univ Alaska Anchorage, Coll Business & Publ Policy, Anchorage, AK 99508 USA.
RP Zheng, DH (reprint author), Univ Houston, 126 Heyne Bldg, Houston, TX 77204 USA.
EM zhengdianhan@gmail.com
NR 119
TC 1
Z9 2
U1 4
U2 33
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1048-9843
EI 1873-3409
J9 LEADERSHIP QUART
JI Leadersh. Q.
PD OCT
PY 2015
VL 26
IS 5
BP 732
EP 748
DI 10.1016/j.leaqua.2015.01.006
PG 17
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA CU3PD
UT WOS:000363436400005
ER
PT J
AU Eninger, RM
Johnson, RL
AF Eninger, Robert M.
Johnson, Robert L.
TI Unmanned Aerial Systems in Occupational Hygiene-Learning from Allied
Disciplines
SO ANNALS OF OCCUPATIONAL HYGIENE
LA English
DT Article
DE environmental monitoring; industrial hygiene; occupational hygiene;
sampling; unmanned aerial systems
ID AIR SAMPLER; VEHICLE; DISTRIBUTIONS; DESIGN
AB Unmanned Aerial System (UAS) technologies are rapidly developing, lowering cost, and technology barriers for their use in numerous applications. This review and commentary summarizes relevant literature in allied fields and evaluates potential application and utility of UAS technology in the discipline of occupational hygiene. Disciplines closely related to occupational hygiene are moving to investigate potential uses-and in some cases-already employing this technology for research or commercial purposes. The literature was reviewed to formulate a cross-sectional picture of how UAS technology is being used in these closely allied disciplines which could inform or guide potential use in occupational hygiene. Discussed are UAS applications in environmental monitoring, emergency response, epidemiology, safety, and process optimization. A rapidly developing state of the art indicates that there is potential utility for this technology in occupational hygiene. Benefits may include cost savings, time savings, and averting hazardous environments via remote sensing. The occupational hygiene community can look to allied fields to garner lessons and possible applications to their own practice.
C1 [Eninger, Robert M.] US Air Force, Inst Technol, Dept Syst Engn & Management, Wright Patterson AFB, OH 45433 USA.
[Johnson, Robert L.] Global Secur Sci Div, Argonne, IL 60439 USA.
RP Eninger, RM (reprint author), US Air Force, Inst Technol, Dept Syst Engn & Management, 2950 Hobson Way,B640,Suite 103, Wright Patterson AFB, OH 45433 USA.
EM eninger@gmail.com
NR 34
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U1 4
U2 10
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0003-4878
EI 1475-3162
J9 ANN OCCUP HYG
JI Ann. Occup. Hyg.
PD OCT
PY 2015
VL 59
IS 8
BP 949
EP 958
DI 10.1093/annhyg/mev041
PG 10
WC Public, Environmental & Occupational Health; Toxicology
SC Public, Environmental & Occupational Health; Toxicology
GA CT4PK
UT WOS:000362788900001
PM 26180263
ER
PT J
AU Biffinger, JC
Barlow, DE
Cockrell, AL
Cusick, KD
Hervey, WJ
Fitzgerald, LA
Nadeau, LJ
Hung, CS
Crookes-Goodson, WJ
Russell, JN
AF Biffinger, Justin C.
Barlow, Daniel E.
Cockrell, Allison L.
Cusick, Kathleen D.
Hervey, William J.
Fitzgerald, Lisa A.
Nadeau, Lloyd J.
Hung, Chia S.
Crookes-Goodson, Wendy J.
Russell, John N., Jr.
TI The applicability of Impranil (R) DLN for gauging the biodegradation of
polyurethanes
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE Biodegradation; Polyurethane; Hydrolase; NMR; IR; Colloid
ID POLYESTER-POLYURETHANE; PSEUDOMONAS-FLUORESCENS; DEGRADATION;
PURIFICATION; ENZYME; LIPASE; GROWTH; MECHANISM; FUNGI
AB Polyurethane-based polymers and their eventual degradation products pervade modern society. One common method for determining whether a microorganism or protein can degrade this class of polymer is to qualitatively assess its ability to "clear" a polyester-polyurethane colloid branded Impranil (R) DLN (Impranil), whose formulation is proprietary. However, its colloidal state has ultimately made Impranil a precarious choice for determining if an organism or enzyme can degrade polyurethanes. In this work, the chemical hydrolysis products from Impranil using 0.1 M HCl or 0.1 M NaOH were identified and compared to the concentration of hydrolysis products formed using three commercial enzymes by proton nuclear magnetic spectroscopy (H-1 NMR) and Fourier-transform infrared spectroscopy (FT-IR). The differences in the integrated signal intensities from key H-1 NMR signals were used to calculate the amount of Impranil that was hydrolyzed. These data were then correlated with the change in optical density of colloid containing reaction mixtures (termed as "clearing"). The enzymes (a Pseudomonas fluorescens recombinant esterase, Pseudomonas sp. lipase, and Bacillus sp. protease) showed significant esterase activities and partially-cleared, completely-cleared, or aggregated Impranil, respectively. However, only the Pseudomonas sp. lipase significantly degraded Impranil based on NMR and IR data. This study illustrates how Impranil can be used to quantitatively assess biodegradation rather than just be a qualitative "clearing" indicator of biodegradation. Published by Elsevier Ltd.
C1 [Biffinger, Justin C.; Barlow, Daniel E.; Fitzgerald, Lisa A.; Russell, John N., Jr.] US Naval Res Lab, Div Chem, Washington, DC 20375 USA.
[Cockrell, Allison L.; Cusick, Kathleen D.] US Naval Res Lab, NRC Postdoctoral Associate, Washington, DC 20375 USA.
[Hervey, William J.] US Naval Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Nadeau, Lloyd J.; Hung, Chia S.; Crookes-Goodson, Wendy J.] Air Force Res Lab, Soft Matter Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Biffinger, JC (reprint author), US Naval Res Lab, Div Chem, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Justin.biffinger@nrl.navy.mil
FU Air Force Office of Scientific Research [12RX14COR]
FX This study was supported by the Air Force Office of Scientific Research
under award number 12RX14COR and Corey Zapatok for his work on the FT-IR
component program.
NR 28
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U1 3
U2 19
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
EI 1873-2321
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD OCT
PY 2015
VL 120
BP 178
EP 185
DI 10.1016/j.polymdegradstab.2015.06.020
PG 8
WC Polymer Science
SC Polymer Science
GA CT6MJ
UT WOS:000362926800020
ER
PT J
AU Kull, KL
Bass, RW
Craft, G
Julien, T
Marangon, E
Marrouat, C
Harmon, JP
AF Kull, Kenneth L.
Bass, Roger W.
Craft, Garrett
Julien, Tamalia
Marangon, Elisa
Marrouat, Cedric
Harmon, Julie P.
TI Synthesis and characterization of an ultra-soft poly(carbonate urethane)
SO EUROPEAN POLYMER JOURNAL
LA English
DT Article
DE Poly(carbonate urethane); Ultra-soft; Mechanical properties; Hydrogen
bonding; Thermal properties
ID THERMOPLASTIC POLYURETHANE ELASTOMERS; HEALING POLYMERIC MATERIALS;
IN-VITRO STABILITY; MECHANICAL-PROPERTIES; BLOCK-COPOLYMERS;
MOLECULAR-WEIGHT; 4,4'-DIPHENYLMETHANE DIISOCYANATE; SEGMENTED
POLYURETHANES; PHASE-SEPARATION; SELF-REPAIR
AB A high performance, thermoplastic polyurethane elastomer was synthesized with methylene bis(4-cyclohexylisocyanate), 1,4-butanediol as a chain extender and a polycarbonate polyol containing 1,6-hexanediol and 3-methyl-1,5-pentanediol. SAXS data evidences an interdomain "center-to-center" distance of 45 A. DSC traces evidence one glass transition temperature and weak melting region. Surprisingly, the material is ultra-soft with a Shore A hardness of 64, but does not undergo any blocking. DMA analysis reveals a low temperature secondary relaxation and the glass to rubber transition followed by a rubbery plateau. In tensile set experiments strain recovery averaged 96-98%. The PCPU exhibits partial self-healing after rupture without the addition of additives or imbedded healing agents. Self-healing is attributed to interdiffusion and hydrogen bonding mechanism, where rehealing is possible. FTIR measurements characterize hydrogen bonding. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Kull, Kenneth L.; Craft, Garrett; Julien, Tamalia; Harmon, Julie P.] Univ S Florida, Dept Chem, Tampa, FL 33620 USA.
[Kull, Kenneth L.; Bass, Roger W.] Solicore Inc, Lakeland, FL 33805 USA.
[Bass, Roger W.] Air Force Tech Applicat Ctr, Patrick AFB, FL 32925 USA.
[Marangon, Elisa] Univ Genoa, Dept Chem & Ind Chem, I-16146 Genoa, Italy.
[Marrouat, Cedric] Ecole Natl Super Chim Clermont Ferrand, F-63174 Aubiere, France.
RP Harmon, JP (reprint author), Univ S Florida, Dept Chem, 4202 East Fowler Ave,CHE 205, Tampa, FL 33620 USA.
EM harmon@usfl.edu
NR 75
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U1 15
U2 61
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0014-3057
EI 1873-1945
J9 EUR POLYM J
JI Eur. Polym. J.
PD OCT
PY 2015
VL 71
BP 510
EP 522
DI 10.1016/j.eurpolymj.2015.08.015
PG 13
WC Polymer Science
SC Polymer Science
GA CT2AG
UT WOS:000362603800041
ER
PT J
AU Fitch, RC
Walker, DE
Green, AJ
Tetlak, SE
Gillespie, JK
Gilbert, RD
Sutherlin, KA
Gouty, WD
Theimer, JP
Via, GD
Chabak, KD
Jessen, GH
AF Fitch, Robert C., Jr.
Walker, Dennis E., Jr.
Green, Andrew J.
Tetlak, Stephen E.
Gillespie, James K.
Gilbert, Ryan D.
Sutherlin, Karynn A.
Gouty, William D.
Theimer, James P.
Via, Glen D.
Chabak, Kelson D.
Jessen, Gregg H.
TI Implementation of High-Power- Density X-Band AlGaN/GaN High Electron
Mobility Transistors in a Millimeter-Wave Monolithic Microwave
Integrated Circuit Process
SO IEEE ELECTRON DEVICE LETTERS
LA English
DT Article
DE GaN; AlGaN; SiC; high electron mobility transistor; X-band; Ka-band;
field-plate
ID HEMTS
AB A GaN high electron mobility transistor monolithic microwave integrated circuit (MMIC) designer typically has to choose a device design either for high-gain millimeter-wave operation with a short gate length, or for high-power-density X-band operation with a much larger gate/field-plate structure. We provide the designer the option of incorporating two different devices by implementing a 0.14-mu m gate length GaN MMIC process capable of high-efficiency Ka-band operation while simultaneously achieving high power density in the same process flow. The key process enabler simply uses the capacitor top plate in the MMIC process as a field plate on the passivation layer. On two separate devices on the same chip using the same MMIC process flow, we demonstrate 7.7 W/mm at 35 GHz and V-DS = 30 V on a standard 4 x 65-mu m T-gated FET and then 12.5 W/mm at 10 GHz and VDS = 60 V on a 4 x 75-mu m T-gated FET by adding a field plate. These are the highest reported power densities achieved simultaneously at X-band and Ka-band in a single wideband GaN MMIC process.
C1 [Fitch, Robert C., Jr.; Walker, Dennis E., Jr.; Green, Andrew J.; Tetlak, Stephen E.; Gillespie, James K.; Gilbert, Ryan D.; Sutherlin, Karynn A.; Gouty, William D.; Theimer, James P.; Via, Glen D.; Chabak, Kelson D.; Jessen, Gregg H.] US Air Force, Res Lab, Sensors Directorate, Aerosp Components Div,Devices Sensing Branch, Dayton, OH 45433 USA.
RP Fitch, RC (reprint author), US Air Force, Res Lab, Sensors Directorate, Aerosp Components Div,Devices Sensing Branch, Dayton, OH 45433 USA.
EM robert.fitch@wpafb.af.mil
FU Air Force Manufacturing and Industrial Technologies Division [TIA FA
8650-13-2-5500]
FX This work was performed in collaboration with the Air Force
Manufacturing and Industrial Technologies Division under Contract TIA FA
8650-13-2-5500. The review of this letter was arranged by Editor Y. Wu.
NR 18
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U1 2
U2 17
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0741-3106
EI 1558-0563
J9 IEEE ELECTR DEVICE L
JI IEEE Electron Device Lett.
PD OCT
PY 2015
VL 36
IS 10
BP 1004
EP 1007
DI 10.1109/LED.2015.2474265
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA CS7TJ
UT WOS:000362288700005
ER
PT J
AU Cumby, BL
Mast, DB
Tabor, CE
Dickey, MD
Heikenfeld, J
AF Cumby, Brad L.
Mast, David B.
Tabor, Christopher E.
Dickey, Michael D.
Heikenfeld, Jason
TI Robust Pressure-Actuated Liquid Metal Devices Showing Reconfigurable
Electromagnetic Effects at GHz Frequencies
SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
LA English
DT Article; Proceedings Paper
CT IEEE Topical Conference on Biomedical Wireless Technologies, Networks,
and Sensing Systems (BioWireleSS)
CY JAN 25-28, 2015
CL San Diego, CA
SP IEEE, IEEE Microwave Theory & Tech Soc, EEE AP-S, IEEE Engn Med & Biol Soc
DE Antennas; attenuation; diffraction; liquid metal; microfluidics;
polarization; shielding
ID DIGITAL MICROFLUIDICS; ANTENNAS
AB Pressure-actuated liquid metal devices are demonstrated for reconfigurable electromagnetic fundamentals at GHz frequencies, including tunable dipole antennas, switchable shielding with 35-dB attenuation, similar to 30-dB polarizer attenuation, and similar to 40 degrees diffraction from a linear grating. In addition to a wide variety of electromagnetic effects, these devices are further advanced by: being highly physically flexible; in use of nontoxic GaInSn (68.5% Ga, 21.5% In, and 10.0% Sn) alloy as enabled by a sealed closed system with an acidic vapor background; and non-alloying/corrosion-resistant carbon inks for electrical connection. Collectively, this work addresses a wide variety of electromagnetic fundamentals, and the device construction advances required for real-world applications.
C1 [Cumby, Brad L.; Heikenfeld, Jason] Univ Cincinnati, Dept Elect Engn & Comp Syst, Cincinnati, OH 45221 USA.
[Mast, David B.] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA.
[Tabor, Christopher E.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Dickey, Michael D.] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
RP Heikenfeld, J (reprint author), Univ Cincinnati, Dept Elect Engn & Comp Syst, Cincinnati, OH 45221 USA.
EM heikenjc@ucmail.uc.edu
FU Air Force Research Laboratory [UES-875-060-020]; Southwestern Ohio
Council for Higher Education; National Science Foundation (NSF) under
CAREER Award [CMMI-0954321]
FX The work of B. L. Cumby, D. B. Mast, and J. Heikenfeld was supported by
the Air Force Research Laboratory under Contract UES-875-060-020 and by
the Southwestern Ohio Council for Higher Education. The work of M. D.
Dickey was supported by the National Science Foundation (NSF) under
CAREER Award CMMI-0954321. This paper has supplementary downloadable
material available at http://ieeexplore.ieee.org, provided by the
authors. This includes a PDF document, containing a figure and measured,
simulated, and calculated data. This material is 189 kB in size.
(Corresponding author: Jason Heikenfeld.)
NR 24
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PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9480
EI 1557-9670
J9 IEEE T MICROW THEORY
JI IEEE Trans. Microw. Theory Tech.
PD OCT
PY 2015
VL 63
IS 10
BP 3122
EP 3130
DI 10.1109/TMTT.2015.2470244
PN 1
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA CS8SE
UT WOS:000362357900013
ER
PT J
AU Khalilzadeh-Rezaie, F
Oladeji, IO
Cleary, JW
Nader, N
Nath, J
Rezadad, I
Peale, RE
AF Khalilzadeh-Rezaie, Farnood
Oladeji, Isaiah O.
Cleary, Justin W.
Nader, Nima
Nath, Janardan
Rezadad, Imen
Peale, Robert E.
TI Fluorine-doped tin oxides for mid-infrared plasmonics
SO OPTICAL MATERIALS EXPRESS
LA English
DT Article
ID OPTICAL-PROPERTIES; SURFACE-PLASMONS; FILMS; GOLD; METAMATERIALS;
POLARITONS; SILVER; PHOTONICS; SILICIDES; SILICON
AB Fluorine-doped tin oxides (FTO) were investigated for infrared plasmonic applications. Nano-crystalline FTO thin films were grown by the SPEED chemical-spray deposition method. Complex permittivity spectra were measured from 1.6 to 12 mu m wavelength. These spectra were used to calculate materials parameters, which compared well with values from transport measurements, and to predict characteristics of surface plasmon polaritons (SPP). Reflectivity spectra for lamellar FTO gratings revealed SPP coupling resonances in good agreement with predictions. The FTO film studied here is well suited for plasmonic applications in the important 3-5 mu m wavelength range. (C) 2015 Optical Society of America.
C1 [Khalilzadeh-Rezaie, Farnood; Nath, Janardan; Rezadad, Imen; Peale, Robert E.] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
[Oladeji, Isaiah O.] SISOM Thin Films LLC, Orlando, FL 32805 USA.
[Cleary, Justin W.; Nader, Nima] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Nader, Nima] Solid State Sci Corp, Nashua, NH 03060 USA.
RP Khalilzadeh-Rezaie, F (reprint author), Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
EM Robert.Peale@ucf.edu
FU University of Central Florida's research excellence fellowship;
Northrop-Grumman scholarship; Florida High Technology (I-4) program; Air
Force Office of Scientific Research under AFSOR LRIR [15RYCOR162];
Sensors Directorate at the Air Force Research Labs
FX F. K. R. acknowledges support from University of Central Florida's
research excellence fellowship and Northrop-Grumman scholarship. Work by
UCF authors was partly supported by Florida High Technology (I-4)
program. J. W. C. and N. N. were supported by Air Force Office of
Scientific Research under AFSOR LRIR No. 15RYCOR162 (Program Officer Dr.
Gernot Pomrenke). R. E. P. was partially supported by Sensors
Directorate at the Air Force Research Labs.
NR 36
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U1 4
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2159-3930
J9 OPT MATER EXPRESS
JI Opt. Mater. Express
PD OCT 1
PY 2015
VL 5
IS 10
BP 2184
EP 2192
DI 10.1364/OME.5.002184
PG 9
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA CT0BX
UT WOS:000362460000012
ER
PT J
AU Abadie, WM
Partington, EJ
Fowler, CB
Schmalbach, CE
AF Abadie, Wesley M.
Partington, Erin J.
Fowler, Craig B.
Schmalbach, Cecelia E.
TI Optimal Management of Proliferative Verrucous Leukoplakia: A Systematic
Review of the Literature
SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY
LA English
DT Review
DE leukoplakia; oral cancer; oral cavity; squamous cell carcinoma
ID SQUAMOUS-CELL CARCINOMA; ORAL LEUKOPLAKIA; VITAMIN-A; LONG-TERM;
PROGRESSION; INFECTION; ASSOCIATION; FEATURES; ENTITY; RISK
AB Objective Proliferative verrucous leukoplakia (PVL) is a rare and recalcitrant form of leukoplakia. The purpose of this review is to further characterize the risk factors, clinical course, and optimal treatment for this highly aggressive, premalignant lesion.
Data Sources Twenty-six articles on PVL with a total of 329 PVL cases.
Review Methods A systematic review of the literature using Ovid, PubMed, Cochrane Database, and gray literature was conducted of all PVL cases reported between 1985 and 2014. Inclusion criteria required reporting of patient follow-up and recurrence rates. Data were analyzed using descriptive statistics. Student t test and Fisher exact test were used to identify factors associated with malignant transformation.
Results The mean patient age was 63.9 years. Most patients were female (66.9%) and nontobacco users (65.22%). Mean follow-up was 7.4 years, with an average of 9.0 biopsies per patient during this period. Proliferative verrucous leukoplakia exhibited histopathologic features along a progressive spectrum, evolving from leukoplakia to verrucous hyperplasia and ultimately invasive carcinoma. Surgery was the most common treatment implemented, but recurrence rates among 222 patients reached 71.2%. Subgroup analysis of 277 patients identified a 63.9% malignant transformation rate, and 39.6% of patients died of their disease. Age, sex, and tobacco use were not identified as risk factors associated with progression to cancer.
Conclusions Proliferative verrucous leukoplakia is a rare form of leukoplakia with a high rate of malignant transformation. It necessitates high clinical suspicion, to include a lifetime of close follow-up and repeat biopsies by a health care provider well versed in oral carcinoma.
C1 [Abadie, Wesley M.] Mike OCallaghan Fed Med Ctr, Dept Otolaryngol, Nellis Afb, NV USA.
[Partington, Erin J.; Schmalbach, Cecelia E.] Univ Alabama Birmingham, Div Otolaryngol, Birmingham, AL 35294 USA.
[Fowler, Craig B.] Univ Kentucky, Sch Dent, Div Oral & Maxillofacial Pathol, Lexington, KY USA.
RP Partington, EJ (reprint author), Univ Alabama Birmingham, Div Otolaryngol, BDB 563,1720 2nd Ave S, Birmingham, AL 35294 USA.
EM epartington@uabmc.edu
NR 41
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U1 0
U2 3
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0194-5998
EI 1097-6817
J9 OTOLARYNG HEAD NECK
JI Otolaryngol. Head Neck Surg.
PD OCT
PY 2015
VL 153
IS 4
BP 504
EP 511
DI 10.1177/0194599815586779
PG 8
WC Otorhinolaryngology; Surgery
SC Otorhinolaryngology; Surgery
GA CS9XD
UT WOS:000362445800007
PM 26044786
ER
PT J
AU Veksler, VD
Myers, CW
Gluck, KA
AF Veksler, Vladislav D.
Myers, Christopher W.
Gluck, Kevin A.
TI Model Flexibility Analysis
SO PSYCHOLOGICAL REVIEW
LA English
DT Article
DE model evaluation; model selection; goodness of fit; model flexibility;
parametric complexity
ID COGNITIVE SCIENCE; RESPONSE-TIME; BAYES FACTORS; GOOD FIT;
REINFORCEMENT; PARAMETERS; SELECTION
AB A good fit of model predictions to empirical data are often used as an argument for model validity. However, if the model is flexible enough to fit a large proportion of potential empirical outcomes, finding a good fit becomes less meaningful. We propose a method for estimating the proportion of potential empirical outcomes that the model can fit: Model Flexibility Analysis (MFA). MFA aids model evaluation by providing a metric for gauging the persuasiveness of a given fit. We demonstrate that MFA can be more informative than merely discounting the fit by the number of free parameters in the model, and show how the number of free parameters does not necessarily correlate with the flexibility of the model. Additionally, we contrast MFA with other flexibility assessment techniques, including Parameter Space Partitioning, Model Mimicry, Minimum Description Length, and Prior Predictive Evaluation. Finally, we provide examples of how MFA can help to inform modeling results and discuss a variety of issues relating to the use of MFA in model validation.
C1 [Veksler, Vladislav D.] US Army, Res Lab, Human Res & Engn, DCS Corp, Aberdeen, MD 21001 USA.
[Myers, Christopher W.; Gluck, Kevin A.] US Air Force, Res Lab, Human Performance Wing 711, Wright Patterson AFB, OH 45433 USA.
RP Veksler, VD (reprint author), US Army, Res Lab, Bldg 417, Aberdeen, MD 21001 USA.
EM vdv718@gmail.com
FU Air Force Research Laboratory's Cognitive Models and Agents Branch;
AFOSR [13RH06COR]; Army Research Laboratory [W911NF-10-D-0002];
MindModeling.org; [W911NF-09-2-0053]
FX This research was performed partly while the first author held a
National Research Council Research Associateship Award with the Air
Force Research Laboratory's Cognitive Models and Agents Branch. A
majority of this work was supported by AFOSR Grant 13RH06COR. A part of
this work was performed by the first author as a DCS Corp contractor
under Army Research Laboratory contract W911NF-10-D-0002 and supporting
work funded under Cooperative Agreement Number W911NF-09-2-0053. We
thank Joseph W. Houpt and Matthew M. Walsh for their invaluable input.
We extend many thanks to the reviewers of this article, especially to
Peter Grunwald, who provided an extended review with a complete NML
tutorial. Additionally, we thank MindModeling.org for providing easy
access to large scale computing resources that supported this research.
NR 42
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U1 2
U2 7
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0033-295X
EI 1939-1471
J9 PSYCHOL REV
JI Psychol. Rev.
PD OCT
PY 2015
VL 122
IS 4
BP 755
EP 769
DI 10.1037/a0039657
PG 15
WC Psychology; Psychology, Multidisciplinary
SC Psychology
GA CT0UB
UT WOS:000362511500008
PM 26322547
ER
PT J
AU Brandt, Y
Currier, L
Plante, TW
Kabban, CMS
Tvaryanas, AP
AF Brandt, Yvonne
Currier, Linda
Plante, Timothy W.
Kabban, Christine M. Schubert
Tvaryanas, Anthony P.
TI A Randomized Controlled Trial of Core Strengthening Exercises in
Helicopter Crewmembers with Low Back Pain
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Article
DE disability; whole body vibration; ergonomics
ID CLINICAL-PREDICTION RULE; STABILIZATION EXERCISES; VIBRATION; AIRCREW;
PILOTS
AB BACKGROUND: The purpose of this study was to determine if five core strengthening exercises would decrease pain severity and related disability in U.S. Air Force helicopter aircrew members with low back pain.
METHODS: The study was a randomized control group repeated measures design. The experimental manipulation consisted of a set of five core strengthening exercises performed 4 d/wk for 12 wk. Self-reported pain severity and disability were ascertained at baseline and 12 wk using the Numerical Pain Rating Scale (NPRS) and Modified Oswestry Low Back Pain Disability Index (MODI), respectively. The NPRS was used to ascertain both daily pain (NPRSdaily) and in-flight pain (NPRSflight). Self-reported improvement or deterioration in low back pain was measured using the Global Rating of Change Scale (GRCS).
RESULTS: There were 12 subjects enrolled and 5 were randomized to the intervention group. The mean NPRSflight score decreased 1.8 points vs. increasing 0.1 points during the trial for the intervention and control groups, respectively. The mean MODI score decreased 4.8 points vs. increasing 1.7 points during the trial for the intervention and control groups, respectively. The mean GRCS score at the end of the trial was 4.0 vs. 0 for the intervention and control groups, respectively. There was no difference between groups in terms of mean NPRSdaily scores.
CONCLUSIONS: Core strengthening exercises were effective in reducing in-flight pain and led to a reduction in pain symptoms and disability over the 12-wk study period as compared to those subjects who maintained their regular exercise regimen.
C1 [Tvaryanas, Anthony P.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Currier, Linda] US Air Force, Med Grp 374, Yokota Air Base, Japan.
[Plante, Timothy W.] US Air Force, Joint Base Pearl Harbor, Med Grp 15, Hickam, HI USA.
[Kabban, Christine M. Schubert] Air Force Inst Technol, Wright Patterson AFB, OH USA.
RP Tvaryanas, AP (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM anthony.tvaryanas@us.af.mil
NR 25
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Z9 0
U1 5
U2 11
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD OCT
PY 2015
VL 86
IS 10
BP 889
EP 894
DI 10.3357/AMHP.4245.2015
PG 6
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA CS4PF
UT WOS:000362057300006
PM 26564676
ER
PT J
AU Kapaku, RK
Rankin, BA
Gore, JP
AF Kapaku, Robert K.
Rankin, Brent A.
Gore, Jay P.
TI Quantitative imaging of radiation from soot and carbon dioxide in a
turbulent ethylene jet diffusion flame
SO COMBUSTION AND FLAME
LA English
DT Article
DE Flame radiation; Soot radiation; Turbulent nonpremixed flame; Sooting
flame; Infrared imaging
ID THERMAL-RADIATION; TEMPERATURE; SIMULATIONS; METHANE; MODEL
AB Quantitative imaging of mid-infrared radiation provides a unique capability to investigate temporally and spatially resolved radiation from gas species and particulates in turbulent flames. The current study reports and analyzes quantitative images of radiation intensity from a turbulent ethylene jet diffusion flame that matches the Reynolds number (15,200) of a non-sooting flame (DLR-A) from the International Workshop on Measurement and Computation of Turbulent Non-premixed Flames. A calibrated high-speed mid-infrared camera with two band-pass filters was used to acquire images of radiation intensity in wavelengths corresponding to soot and carbon dioxide. The measurements, in the wavelength band corresponding to radiation emissions from soot, show thin radiating structures corresponding to soot layers. The normalized probability density functions (PDFs) of soot radiation are skewed by intermittent high intensities while the PDFs of carbon dioxide radiation are more symmetric about the mean. The temporal and spatial integral scales of radiation from soot are up to 30% shorter than the corresponding scales of radiation from carbon dioxide for image centerline locations downstream of initial soot radiation detection. The images and analyses in this work will be compared with results of large eddy simulations rendered in the form of quantitative images of the mid-infrared radiation intensity. Such comparisons support the evaluation of models used in turbulent combustion and radiation simulations. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Kapaku, Robert K.; Gore, Jay P.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
[Rankin, Brent A.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Rankin, BA (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM brent.a.rankin@gmail.com
RI Rankin, Brent/A-1598-2017
OI Rankin, Brent/0000-0002-5967-9527
NR 28
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U1 4
U2 13
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD OCT
PY 2015
VL 162
IS 10
BP 3704
EP 3710
DI 10.1016/j.combustflame.2015.07.009
PG 7
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA CS2TT
UT WOS:000361925600022
ER
PT J
AU Gao, X
Zhang, Y
Adusumilli, S
Seitzman, J
Sun, WT
Ombrello, T
Carter, C
AF Gao, Xiang
Zhang, Yao
Adusumilli, Sampath
Seitzman, Jerry
Sun, Wenting
Ombrello, Timothy
Carter, Campbell
TI The effect of ozone addition on laminar flame speed
SO COMBUSTION AND FLAME
LA English
DT Article
DE Ozone; Flame propagation; Laminar flame speed; Pressure effect;
Ozonolysis reactions
ID BURNING VELOCITY; COMPRESSION IGNITION; DIFFUSION FLAME; GAS-PHASE;
COMBUSTION; METHANE; HYDROCARBONS; OZONOLYSIS; OXIDATION; MIXTURES
AB The effect of ozone (O-3) addition on laminar flame speeds (S-L) across a wide pressure range was investigated experimentally and numerically using three fuels, CH4, C2H4 and C3H8. Enhancement of S-L due to O-3 addition was consistently observed for CH4 and C3H8 mixtures over a range of lean to rich equivalence ratios, based on comparisons of S-L measured with and without O-3 addition. For both fuels, simulation results agree with experimental results, with the best predictions at near stoichiometric conditions and the largest discrepancies for fuel-rich cases. A significant increase in the S-L enhancement was observed at elevated pressures: the enhancement in the measured S-L for a stoichiometric CH4/air mixture with 6334 parts per million (ppm) O-3 addition increased from 7.7% at atmospheric pressure to 11% at 2.5 atm. Elevated pressure both promotes O-3 decomposition, which provides O atoms, and suppresses diffusion of H, which reduces the influence of the O-3+H=OH+O-2 reaction. Together, these lead to the increased S-L enhancement with pressure. In contrast to the results for the two saturated hydrocarbons, both detrimental and beneficial effects due to O-3 addition were observed for the unsaturated hydrocarbon fuel, C2H4 in this study. With O-3 addition, C2H4/air S-L decreased at room temperature and pressure, owing to the heat loss induced by the exothermic ozonolysis reaction between O-3 and C2H4 in the mixing process, but increased as the ozonolysis reactions were minimized when reactants were cooled to 200 K or pressure was decreased below 0.66 atm. These experimental results were successfully explained by a numerical model that includes a new ozonolysis sub-mechanism. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Gao, Xiang; Zhang, Yao; Adusumilli, Sampath; Seitzman, Jerry; Sun, Wenting] Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA.
[Ombrello, Timothy; Carter, Campbell] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Sun, WT (reprint author), Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA.
EM wenting.sun@aerospace.gatech.edu
NR 46
TC 2
Z9 2
U1 4
U2 18
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD OCT
PY 2015
VL 162
IS 10
BP 3914
EP 3924
DI 10.1016/j.combustflame.2015.07.028
PG 11
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA CS2TT
UT WOS:000361925600038
ER
PT J
AU Roy, DG
Mudaliar, S
AF Roy, Dilip Ghosh
Mudaliar, Saba
TI Domain Derivatives in Dielectric Rough Surface Scattering
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Dielectric rough surface; domain differentiation; Eulerian derivative;
locally perturbed; scattering
ID INVERSE SCATTERING; KIRCHHOFF APPROXIMATION; FRECHET DERIVATIVES;
RECONSTRUCTION; FIELD; ALGORITHMS; EQUATIONS; PROFILES; SHAPE
AB The inverse scattering solution of shape and/or material parameter reconstruction is often posed as a problem in nonlinear minimization of an objective function with respect to N (usually large) number of unknown model parameters characterizing the scatterer. The minimization procedures are usually iterative, and require the gradient of the objective function in the unknown model parameter vector in each stage of iteration. For large N, finite differencing becomes numerically intensive, and an efficient alternative is domain differentiation in which the full gradient is obtained by solving a single scattering problem of an auxiliary field using the same scattering operator as that of the forward solution. A well-known technique in this direction is the so-called adjoint field method, which obtains the gradient by variationally minimizing an augmented objective function that includes the reduced wave equation via a Lagrange multiplier. Results are reported mostly for compact objects. This paper presents the domain derivative calculation of the gradient for a one-dimensional, locally perturbed, and infinitely long dielectric interface. The method is nonvariational and algebraic in nature in that it evaluates the gradient by directly domain differentiating the scattering equations. The computations are straightforward and easy to follow. The mathematical transformation of the scattering problem into the corresponding problem for the differentiated fields can be visualized explicitly. The formulation of and the motivation behind introducing the auxiliary field are explicitly demonstrated. Closed-form analytic expressions are obtained for the gradients for electromagnetic TE/TM scattering from dielectric rough surfaces and for scalar wave scattering from Neumann and Dirichlet rough surfaces. Results are compared with those of compact scatterers. Finally, the relationship between our results and Lorentz reciprocity is pointed out and clarified.
C1 [Roy, Dilip Ghosh] Riverside Res Inst, Beavercreek, OH 45433 USA.
[Mudaliar, Saba] US Air Force, Res Lab, Sensors Directorate, Dayton, OH 45433 USA.
RP Roy, DG (reprint author), Riverside Res Inst, Beavercreek, OH 45433 USA.
EM saba.mudaliar@us.af.mil
FU U.S. Air Force Office of Scientific Research; Air Force Research
Laboratory
FX The authors thank the U.S. Air Force Office of Scientific Research and
the Air Force Research Laboratory for their support. They acknowledge
the fruitful discussions with S. Norton (Duke University, Durham, NC,
USA) and J. Wiskin (Techniscan, Salt Lake City, UT, USA).
NR 49
TC 0
Z9 0
U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
EI 1558-2221
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD OCT
PY 2015
VL 63
IS 10
BP 4486
EP 4495
DI 10.1109/TAP.2015.2463682
PG 10
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CS8TU
UT WOS:000362362200025
ER
PT J
AU Briczinski, SJ
Bernhardt, PA
Siefring, CL
Han, SM
Pedersen, TR
Scales, WA
AF Briczinski, S. J.
Bernhardt, P. A.
Siefring, C. L.
Han, S. -M.
Pedersen, T. R.
Scales, W. A.
TI "Twisted Beam" SEE Observations of Ionospheric Heating from HAARP
SO EARTH MOON AND PLANETS
LA English
DT Article
DE Ionospheric modification; Orbital angular momentum; Twisted beam
AB Nonlinear interactions of high power HF radio waves in the ionosphere provide aeronomers with a unique space-based laboratory capability. The High-Frequency Active Auroral Research Program (HAARP) in Gakona, Alaska is the world's largest heating facility, yielding effective radiated powers in the gigawatt range. New results are present from HAARP experiments using a "twisted beam" excitation mode. Analysis of twisted beam heating shows that the SEE results obtained are identical to more traditional patterns. One difference in the twisted beam mode is the heating region produced is in the shape of a ring as opposed to the more traditional "solid spot" region from a pencil beam. The ring heating pattern may be more conducive to the creation of stable artificial airglow layers because of the horizontal structure of the ring. The results of these runs include artificial layer creation and evolution as pertaining to the twisted beam pattern. The SEE measurements aid the interpretation of the twisted beam interactions in the ionosphere.
C1 [Briczinski, S. J.; Bernhardt, P. A.; Siefring, C. L.; Han, S. -M.] US Navy, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Pedersen, T. R.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Scales, W. A.] Virginia Tech, Dept Elect Engn, Blacksburg, VA 24061 USA.
RP Bernhardt, PA (reprint author), US Navy, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM bern@ppd.nrl.navy.mil
FU DARPA; NRL 6.1 Base Program
FX The HAARP research at the Naval Research Laboratory was sponsored by
DARPA and the NRL 6.1 Base Program.
NR 9
TC 1
Z9 1
U1 1
U2 4
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0167-9295
EI 1573-0794
J9 EARTH MOON PLANETS
JI Earth Moon Planets
PD OCT
PY 2015
VL 116
IS 1
BP 55
EP 66
DI 10.1007/s11038-015-9460-3
PG 12
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary
SC Astronomy & Astrophysics; Geology
GA CS2JX
UT WOS:000361897900003
ER
PT J
AU Klimova, M
Zherebtsov, S
Salishchev, G
Semiatin, SL
AF Klimova, M.
Zherebtsov, S.
Salishchev, G.
Semiatin, S. L.
TI Influence of deformation on the Burgers orientation relationship between
the alpha and beta phases in Ti-5Al-5Mo-5V-1Cr-1Fe
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Titanium alloys; Orientation relationships; Interfaces; EBSD
ID 800 DEGREES-C; TI-6AL-4V ALLOY; MICROSTRUCTURE; WORKING; HOT
AB The evolution of microstructure in Ti-5Al-5Mo-5V-1Cr-1Fe with an initial lamellar microstructure during compression to a true strain 1.2 at 800 degrees C was established via EBSD analysis. The principal features comprised recrystallization of the beta matrix and fragmentation/spheroidization of alpha lamellae. Angular deviations from the Burgers orientation relation (OR) and the kinetics of the spheroidization of lamellar microstructure as a function of strain were quantified. The influence of the deviation from the OR on spheroidization kinetics of the lamellar structure was interpreted. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Klimova, M.; Zherebtsov, S.; Salishchev, G.] Belgorod State Univ, Belgorod 308015, Russia.
[Semiatin, S. L.] Air Force Res Lab, Mat & Mfg Directorate, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
RP Klimova, M (reprint author), Belgorod State Univ, 85 Pobeda St, Belgorod 308015, Russia.
EM klimova_mv@bsu.edu.su
RI Salishchev, Gennady/G-4767-2016; Zherebtsov, Sergey/G-7435-2011;
SEMIATIN, SHELDON/E-7264-2017
OI Salishchev, Gennady/0000-0002-0815-3525; Zherebtsov,
Sergey/0000-0002-1663-429X;
FU Ministry of Education and Science of the Russian Federation, Russia,
Belgorod State University [11.1816.2014/K]
FX The authors gratefully acknowledge the financial support from the
Ministry of Education and Science of the Russian Federation, Russia,
Belgorod State University Project no. 11.1816.2014/K. The authors are
grateful to the personnel of the Joint Research Centre, Belgorod State
University, for their assistance with the experimental analysis.
NR 17
TC 1
Z9 1
U1 1
U2 12
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 1
PY 2015
VL 645
BP 292
EP 297
DI 10.1016/j.msea.2015.08.008
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA CR8DS
UT WOS:000361581900036
ER
PT J
AU Spera, C
Matto, HC
Travis, W
AF Spera, Christopher
Matto, Holly C.
Travis, Wendy
TI Research Note: Satisfaction with Air Force Way of Life Pre- and
Post-9/11
SO ARMED FORCES & SOCIETY
LA English
DT Article
DE satisfaction; retention
AB This study examined whether satisfaction with the Air Force (AF) as way of life increased post-9/11 and whether it has sustained. Using data from 179,309 personnel collected across a period of eight years (2000-2008) in four waves of cross-sectional data collection, we found that satisfaction with the AF as a way of life increased dramatically following 9/11 and since then has declined from the height, but has not returned to pre-9/11 levels. After controlling for time as well as demographics, the best predictors of satisfaction were (1) feeling that the AF is a good environment for bringing up children, (2) a strong a sense of community, and (3) perceived strong unit leader support for members and their families.
C1 [Spera, Christopher] Abt Associates Inc, Bethesda, MD USA.
[Matto, Holly C.] George Mason Univ, Coll Hlth & Human Serv, Dept Social Work, Fairfax, VA 22030 USA.
[Travis, Wendy] US Air Force, San Antonio, TX USA.
RP Spera, C (reprint author), Abt Associates Inc, Cambridge, MA 02138 USA.
EM cspera30@gmail.com
NR 4
TC 1
Z9 1
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0095-327X
EI 1556-0848
J9 ARMED FORCES SOC
JI Armed Forces Soc.
PD OCT
PY 2015
VL 41
IS 4
BP 734
EP 741
DI 10.1177/0095327X14550857
PG 8
WC Political Science; Sociology
SC Government & Law; Sociology
GA CR2OM
UT WOS:000361169900007
ER
PT J
AU Miracle, DB
AF Miracle, Daniel B.
TI The density and packing fraction of binary metallic glasses (vol 61, pg
3157, 2013)
SO ACTA MATERIALIA
LA English
DT Correction
C1 US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Miracle, DB (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM daniel.miracle@us.af.mil
NR 1
TC 0
Z9 0
U1 5
U2 32
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD OCT 1
PY 2015
VL 98
BP 433
EP 436
DI 10.1016/j.actamat.2015.07.065
PG 4
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CR1GX
UT WOS:000361074000043
ER
PT J
AU Hilton, AM
Brown, JL
Moore, EA
Hoelscher, JA
Heller, ER
Dorsey, DL
AF Hilton, A. M.
Brown, J. L.
Moore, E. A.
Hoelscher, J. A.
Heller, E. R.
Dorsey, D. L.
TI Characterization of Cross-Sectioned Gallium Nitride
High-Electron-Mobility Transistors with In Situ Biasing
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article
DE GaN high-electron-mobility transistor (HEMT); degradation; Kelvin probe
force microscopy (KPFM); reliability; trapping; point defect
ID SCANNING CAPACITANCE MICROSCOPY; PROBE MICROSCOPY; ALGAN/GAN; SCALE
AB AlGaN/GaN high-electron-mobility transistors (HEMTs) were characterized in cross-section by Kelvin probe force microscopy (KPFM) during in situ biasing. The HEMTs used in this study were specially designed to maintain full and representative transistor functionality after cross-sectioning perpendicular to the gate width dimension to expose the active channel from source to drain. A cross-sectioning procedure was established that produces samples with high-quality surfaces and minimal degradation in initial transistor performance. A detailed description of the cross-sectioning procedure is provided. Samples were characterized by KPFM, effectively mapping the surface potential of the device in two-dimensional cross-section, including under metallization layers (i.e., gate, field plates, and ohmic contacts). Under the gate and field plate layers are where electric field, temperature, and temperature gradients are all most commonly predicted to have peak values, and where degradation and failure are most likely, and so this is where direct measurements are most critical. In this work, the surface potential of the operating device was mapped in cross-section by KPFM. Charge redistribution was observed during and after biasing, and the surface potential was seen to decay with time back to the prebias condition. This work is a first step toward directly mapping and localizing the steady-state and transient charge distribution due to point defects (traps) before, during, and after device operation, including normally inaccessible regions such as under metallization layers. Such measurements have not previously been demonstrated for GaN HEMT technology.
C1 [Hilton, A. M.; Brown, J. L.; Moore, E. A.; Hoelscher, J. A.] Wyle Aerosp Grp, Dayton, OH 45431 USA.
[Heller, E. R.; Dorsey, D. L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hilton, AM (reprint author), Wyle Aerosp Grp, Dayton, OH 45431 USA.
EM albert.hilton.ctr@wpafb.af.mil
FU Air Force Office of Scientific Research
FX Funding for this work was provided by the Air Force Office of Scientific
Research (Program Officer: Dr. Michael Kendra). This work was executed
under the Air Force Research Laboratory's High Reliability Electronics
Virtual Center (HiREV). Many useful discussions with and technical
assistance from HiREV members are gratefully acknowledged.
NR 24
TC 1
Z9 1
U1 9
U2 41
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
EI 1543-186X
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD OCT
PY 2015
VL 44
IS 10
BP 3259
EP 3264
DI 10.1007/s11664-015-3908-0
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA CQ5VD
UT WOS:000360672900008
ER
PT J
AU Tschopp, MA
Miller, JD
Oppedal, AL
Solanki, KN
AF Tschopp, Mark A.
Miller, Jonathan D.
Oppedal, Andrew L.
Solanki, Kiran N.
TI Evaluating Local Primary Dendrite Arm Spacing Characterization
Techniques Using Synthetic Directionally Solidified Dendritic
Microstructures
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID NICKEL-BASED SUPERALLOYS; HIGH MAGNETIC-FIELD; NI-BASED SUPERALLOY; BASE
SUPERALLOYS; ALLOYS; SEGREGATION; MORPHOLOGY; VARIABLES; FEATURES
AB Microstructure characterization continues to play an important bridge to understanding why particular processing routes or parameters affect the properties of materials. This statement certainly holds true in the case of directionally solidified dendritic microstructures, where characterizing the primary dendrite arm spacing is vital to developing the process-structure-property relationships that can lead to the design and optimization of processing routes for defined properties. In this work, four series of simulations were used to examine the capability of a few Voronoi-based techniques to capture local microstructure statistics (primary dendrite arm spacing and coordination number) in controlled (synthetically generated) microstructures. These simulations used both cubic and hexagonal microstructures with varying degrees of disorder (noise) to study the effects of length scale, base microstructure, microstructure variability, and technique parameters on the local PDAS distribution, local coordination number distribution, bulk PDAS, and bulk coordination number. The Voronoi tesselation technique with a polygon-side-length criterion correctly characterized the known synthetic microstructures. By systematically studying the different techniques for quantifying local primary dendrite arm spacings, we have evaluated their capability to capture this important microstructure feature in different dendritic microstructures, which can be an important step for experimentally correlating with both processing and properties in single crystal nickel-based superalloys.
C1 [Tschopp, Mark A.] US Army Res Lab, Aberdeen Proving Ground, MD 21005 USA.
[Miller, Jonathan D.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Oppedal, Andrew L.] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA.
[Solanki, Kiran N.] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA.
RP Tschopp, MA (reprint author), US Army Res Lab, Aberdeen Proving Ground, MD 21005 USA.
EM mark.a.tschopp.civ@mail.mil
RI Solanki, Kiran/E-8337-2010;
OI Tschopp, Mark/0000-0001-8471-5035
FU AFOSR [FA9550-12-1-0135]
FX The authors would like to acknowledge AFOSR for support for this
research through contract FA9550-12-1-0135 (PM: Dr. David Stargel,
AFOSR/RSA). The authors would like to acknowledge initial discussions
with M. Groeber (Air Force Research Laboratory) in the beginning stages
of this project. Additionally, the authors acknowledge R. Carino (Center
for Advanced Vehicular Systems, Mississippi State University) for
helping implement the scripts utilized herein into a more user-friendly
GUI environment.
NR 36
TC 2
Z9 2
U1 6
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD OCT
PY 2015
VL 46A
IS 10
BP 4610
EP 4628
DI 10.1007/s11661-015-2964-7
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CQ4EX
UT WOS:000360558200023
ER
PT J
AU Harris, JR
Jensen, KL
Shiffler, DA
AF Harris, J. R.
Jensen, K. L.
Shiffler, D. A.
TI Modelling field emitter arrays using line charge distributions
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
DE field emitters; electrostatics; cathodes
ID ELECTRON-EMISSION; CARBON NANOTUBE; SURFACE; ENHANCEMENT
AB Field emitter arrays are high-brightness electron sources with important current and future applications in vacuum electronics, particle accelerators, and directed energy. The current produced by individual emitters in these arrays is controlled by the total electric field on their surfaces, which depends on the background field, the space charge field from previously-emitted electrons, and field enhancements due to geometric features at the macro-, meso-, and micro-scales. To facilitate the study of shielding and space charge effects in these arrays, we have developed a mathematical model using tapered line charges to generate equipotential surfaces which approximate the geometry of high aspect ratio field emitters. This model provides an analytic approach for studying contributions to array performance due to macro-scale and meso-scale features such as array geometry, emitter height, and emitter tip radius. Here we present this model and use it to assess the impact of these parameters on the field enhancement factor of individual field emitters and emitters in 1D and 2D arrays.
C1 [Harris, J. R.] US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
[Jensen, K. L.] Naval Res Lab, Washington, DC 20375 USA.
[Shiffler, D. A.] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
RP Harris, JR (reprint author), US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
EM john.r.harris3@navy.mil
FU Office of Naval Research Reserve Component Joint ST Focus Area; Air
Force Office of Scientific Research
FX The authors gratefully acknowledge the support they have received from
the Office of Naval Research Reserve Component Joint S&T Focus Area
(JRH) and from the Air Force Office of Scientific Research (KLJ),
without which this work would not have been possible. Conversations with
J Petillo (Leidos) are gratefully acknowledged.
NR 36
TC 8
Z9 8
U1 0
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
EI 1361-6463
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD SEP 30
PY 2015
VL 48
IS 38
AR 385203
DI 10.1088/0022-3727/48/38/385203
PG 9
WC Physics, Applied
SC Physics
GA CS3HY
UT WOS:000361964400015
ER
PT J
AU Haugan, HJ
Brown, GJ
Olson, BV
Kadlec, EA
Kim, JK
Shaner, EA
AF Haugan, H. J.
Brown, G. J.
Olson, B. V.
Kadlec, E. A.
Kim, J. K.
Shaner, E. A.
TI Demonstration of long minority carrier lifetimes in very narrow bandgap
ternary InAs/GaInSb superlattices
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID INFRARED DETECTORS
AB Minority carrier lifetimes in very long wavelength infrared (VLWIR) InAs/GaInSb superlattices (SLs) are reported using time-resolved microwave reflectance measurements. A strain-balanced ternary SL absorber layer of 47.0 angstrom InAs/21.5 angstrom Ga0.75In0.25Sb, corresponding to a bandgap of similar to 50 meV, is found to have a minority carrier lifetime of 140 +/- 20 ns at similar to 18 K. This lifetime is extraordinarily long, when compared to lifetime values previously reported for other VLWIR SL detector materials. This enhancement is attributed to the strain-engineered ternary design, which offers a variety of epitaxial advantages and ultimately leads to a reduction of defect-mediated recombination centers. (C) 2015 AIP Publishing LLC.
C1 [Haugan, H. J.; Brown, G. J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Olson, B. V.; Kadlec, E. A.; Kim, J. K.; Shaner, E. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Haugan, HJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM heather.haugan.ctr@us.af.mil
OI Olson, Benjamin/0000-0003-1421-2541
FU Air Force Contract [FA8650-11-D-5800]; U.S. Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX The work of H. J. Haugan was performed under Air Force Contract No.
FA8650-11-D-5800. The authors thank S. Bowers for a technical assistance
with the MBE system and X-ray measurements. The lifetime data reported
here were conducted at Sandia National Laboratories, a multiprogram
laboratory managed and operated by Sandia Corporation, a wholly owned
subsidiary of Lockheed Martin Corporation, for the U.S. Department of
Energy's National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000.
NR 20
TC 3
Z9 3
U1 3
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 28
PY 2015
VL 107
IS 13
AR 131102
DI 10.1063/1.4932056
PG 4
WC Physics, Applied
SC Physics
GA CT1QN
UT WOS:000362575600002
ER
PT J
AU Park, J
Back, T
Mitchel, WC
Kim, SS
Elhamri, S
Boeckl, J
Fairchild, SB
Naik, R
Voevodin, AA
AF Park, Jeongho
Back, Tyson
Mitchel, William C.
Kim, Steve S.
Elhamri, Said
Boeckl, John
Fairchild, Steven B.
Naik, Rajesh
Voevodin, Andrey A.
TI Approach to multifunctional device platform with epitaxial graphene on
transition metal oxide
SO SCIENTIFIC REPORTS
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; HEXAGONAL BORON-NITRIDE; TIO2 NANOPARTICLES;
PHOTORESPONSE; SENSITIZER; STATE
AB Heterostructures consisting of two-dimensional materials have shown new physical phenomena, novel electronic and optical properties, and new device concepts not observed in bulk material systems or purely three dimensional heterostructures. These new effects originated mostly from the van der Waals interaction between the different layers. Here we report that a new optical and electronic device platform can be provided by heterostructures of 2D graphene with a metal oxide (TiO2). Our novel direct synthesis of graphene/TiO2 heterostructure is achieved by C-60 deposition on transition Ti metal surface using a molecular beam epitaxy approach and O-2 intercalation method, which is compatible with wafer scale growth of heterostructures. As-grown heterostructures exhibit inherent photosensitivity in the visible light spectrum with high photo responsivity. The photo sensitivity is 25 times higher than that of reported graphene photo detectors. The improved responsivity is attributed to optical transitions between O 2p orbitals in the valence band of TiO2 and C 2p orbitals in the conduction band of graphene enabled by Coulomb interactions at the interface. In addition, this heterostructure provides a platform for realization of bottom gated graphene field effect devices with graphene and TiO2 playing the roles of channel and gate dielectric layers, respectively.
C1 [Park, Jeongho; Back, Tyson; Mitchel, William C.; Kim, Steve S.; Boeckl, John; Fairchild, Steven B.; Naik, Rajesh; Voevodin, Andrey A.] US Air Force, Res Lab, Mat & Mfg Directorate AFRL RXA, Wright Patterson AFB, OH 45433 USA.
[Back, Tyson] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Back, Tyson] Univ Dayton, Ctr Excellence Thin Film Res & Surface Engn, Dayton, OH 45469 USA.
[Elhamri, Said] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
RP Park, J (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate AFRL RXA, Wright Patterson AFB, OH 45433 USA.
EM jeongho.park@wpafb.af.mil
FU Air Force Research Laboratory
FX This work was supported by the Laboratory Directors Fund from Air Force
Research Laboratory. The authors wish to thank Mr. G. Landis for
technical assistance and helpful discussion.
NR 30
TC 2
Z9 2
U1 5
U2 35
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD SEP 23
PY 2015
VL 5
AR 14374
DI 10.1038/srep14374
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CR8IX
UT WOS:000361595800002
PM 26395160
ER
PT J
AU Galbraith, MC
Benek, JA
Orkwis, PD
Turner, MG
AF Galbraith, Marshall C.
Benek, John A.
Orkwis, Paul D.
Turner, Mark G.
TI A discontinuous Galerkin scheme for Chimera overset viscous meshes on
curved geometries
SO COMPUTERS & FLUIDS
LA English
DT Article
DE Discontinuous Galerkin; Chimera overset method
ID CIRCULAR-CYLINDER; FLOW; SIMULATION; SOLVER
AB The Chimera overset method is a powerful technique for modeling fluid flow associated with complex engineering problems. The use of structured meshes has enabled engineers to develop a number of high-order schemes, such as the WENO and compact differencing schemes. This paper demonstrates a Discontinuous Galerkin (DG) scheme with a Chimera overset method applied to viscous meshes on curved geometries. The small stencil of the DG scheme makes it particularly suitable for Chimera meshes. The small stencil simplifies the hole cutting and partitioning of grids that contain holes. In addition, because the DG scheme represents the solution as cell local polynomials, it does not require an interpolation scheme with a large stencil to establish the inter-grid communication in overlapping regions. Furthermore, the DG scheme is capable of using curved cells to represent geometric features. The curved cells resolve issues associated with linear non-co-located Chimera viscous meshes used for finite volume and finite difference schemes. The DG-Chimera method is demonstrated on a set of viscous Chimera meshes, which would produce erroneous results for a finite volume or finite difference scheme without corrections to the interpolation. (c) 2015 Elsevier Ltd. All rights reserved.
C1 [Galbraith, Marshall C.; Orkwis, Paul D.; Turner, Mark G.] Univ Cincinnati, Dept Aerosp Engn & Engn Mech, Cincinnati, OH 45221 USA.
[Benek, John A.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Galbraith, MC (reprint author), Univ Cincinnati, Dept Aerosp Engn & Engn Mech, Cincinnati, OH 45221 USA.
EM Marshall.Galbraith@gmail.com
FU Department of Defense (DoD) through the National Defense Science &
Engineering Graduate Fellowship (NDSEG) Program
FX This work was supported by the Department of Defense (DoD) through the
National Defense Science & Engineering Graduate Fellowship (NDSEG)
Program. The authors are grateful for Dr. Krzysztof Fidkowski's
assistance and insights in regards to the development of the
Discontinuous Galerkin CFD solver, and for Dr. Ralph Noack assistance
with the software SUGGAR++.
NR 36
TC 1
Z9 1
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7930
EI 1879-0747
J9 COMPUT FLUIDS
JI Comput. Fluids
PD SEP 22
PY 2015
VL 119
BP 176
EP 196
DI 10.1016/j.compfluid.2015.07.002
PG 21
WC Computer Science, Interdisciplinary Applications; Mechanics
SC Computer Science; Mechanics
GA CQ9RJ
UT WOS:000360952400014
ER
PT J
AU Allen, KW
Farahi, N
Li, YC
Limberopoulos, NI
Walker, DE
Urbas, AM
Astratov, VN
AF Allen, Kenneth W.
Farahi, Navid
Li, Yangcheng
Limberopoulos, Nicholaos I.
Walker, Dennis E., Jr.
Urbas, Augustine M.
Astratov, Vasily N.
TI Overcoming the diffraction limit of imaging nanoplasmonic arrays by
microspheres and microfibers
SO OPTICS EXPRESS
LA English
DT Article
ID IMMERSION MICROSCOPE; OPTICAL HYPERLENS; PHOTONIC NANOJET; RESOLUTION;
SUPERRESOLUTION; LIGHT; NANOPARTICLES; ENHANCEMENT; NANOSCOPE; EMISSION
AB Super-resolution microscopy by microspheres emerged as a simple and broadband imaging technique; however, the mechanisms of imaging are debated in the literature. Furthermore, the resolution values were estimated based on semi-quantitative criteria. The primary goals of this work are threefold: i) to quantify the spatial resolution provided by this method, ii) to compare the resolution of nanoplasmonic structures formed by different metals, and iii) to understand the imaging provided by microfibers. To this end, arrays of Au and Al nanoplasmonic dimers with very similar geometry were imaged using confocal laser scanning microscopy at lambda = 405 nm through high-index (n similar to 1.9-2.2) liquid-immersed BaTiO3 microspheres and through etched silica microfibers. We developed a treatment of super-resolved images in label-free microscopy based on using point-spread functions with subdiffraction-limited widths. It is applicable to objects with arbitrary shapes and can be viewed as an integral form of the super-resolution quantification widely accepted in fluorescent microscopy. In the case of imaging through microspheres, the resolution similar to lambda/6-lambda/7 is demonstrated for Au and Al nanoplasmonic arrays. In the case of imaging through microfibers, the resolution similar to lambda/6 with magnification M similar to 2.1 is demonstrated in the direction perpendicular to the fiber with hundreds of times larger field-of-view in comparison to microspheres. (C) 2015 Optical Society of America
C1 [Allen, Kenneth W.; Farahi, Navid; Li, Yangcheng; Astratov, Vasily N.] Univ N Carolina, Ctr Optoelect & Opt Commun, Dept Phys & Opt Sci, Charlotte, NC 28223 USA.
[Limberopoulos, Nicholaos I.; Walker, Dennis E., Jr.; Astratov, Vasily N.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Urbas, Augustine M.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Astratov, VN (reprint author), Univ N Carolina, Ctr Optoelect & Opt Commun, Dept Phys & Opt Sci, Charlotte, NC 28223 USA.
EM kenneth.allen@gtri.gatech.edu; astratov@uncc.edu
FU U.S. Army Research Office [W911NF-09-1-0450]; Center for Metamaterials,
an NSF I/U CRC [1068050]; Air Force Research Laboratory (AFRL/RYD,
AFRL/RXC) through the AMMTIAC with Alion Science and Technology; MCF II
contract with UES, Inc.
FX The authors thank Dr. Alexey Maslov for stimulating discussions. The
authors also thank Dr. Glen Marrs for his help with the use of Zeiss LSM
710 microscope and Drs. Didier Dreau and Robert Peterson for their help
with the use of Olympus FV1000 microscope. This work was supported by
the U.S. Army Research Office through Dr. J. T. Prater under Contract
No. W911NF-09-1-0450 and by Center for Metamaterials, an NSF I/U CRC,
award number 1068050. Also, this work was sponsored by the Air Force
Research Laboratory (AFRL/RYD, AFRL/RXC) through the AMMTIAC contract
with Alion Science and Technology and the MCF II contract with UES, Inc.
NR 57
TC 13
Z9 13
U1 9
U2 24
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD SEP 21
PY 2015
VL 23
IS 19
BP 24484
EP 24496
DI 10.1364/OE.23.024484
PG 13
WC Optics
SC Optics
GA CW5ZQ
UT WOS:000365076400068
PM 26406653
ER
PT J
AU Martinez, O
Ard, SG
Li, AY
Shuman, NS
Guo, H
Viggiano, AA
AF Martinez, Oscar, Jr.
Ard, Shaun G.
Li, Anyang
Shuman, Nicholas S.
Guo, Hua
Viggiano, Albert A.
TI Temperature-dependent kinetic measurements and quasi-classical
trajectory studies for the OH+ + H-2/D-2. H2O+/HDO+ + H/D reactions
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID FORMING BIMOLECULAR REACTIONS; ATOM ABSTRACTION REACTIONS; ION-MOLECULE
REACTIONS; INTERSTELLAR OH+; THERMAL-ENERGY; RATE CONSTANTS; H2O+;
DYNAMICS; H3O+; REACTIVITY
AB We have measured the temperature-dependent kinetics for the reactions of OH+ with H-2 and D-2 using a selected ion flow tube apparatus. Reaction occurs via atom abstraction to result in H2O+/HDO+ + H/D. Room temperature rate coefficients are in agreement with prior measurements and resulting temperature dependences are T-0.11 for the hydrogen and T-0.25 for the deuterated reactions. This work is prompted in part by recent theoretical work that mapped a full-dimensional global potential energy surface of H3O+ for the OH+ + H-2 -> H + H2O+ reaction [A. Li and H. Guo, J. Phys. Chem. A 118, 11168 (2014)], and reported results of quasi-classical trajectory calculations, which are extended to a wider temperature range and initial rotational state specification here. Our experimental results are in excellent agreement with these calculations which accurately predict the isotope effect in addition to an enhancement of the reaction rate constant due to the molecular rotation of OH+. The title reaction is of high importance to astrophysical models, and the temperature dependence of the rate coefficients determined here should now allow for better understanding of this reaction at temperatures more relevant to the interstellar medium. (C) 2015 AIP Publishing LLC.
C1 [Martinez, Oscar, Jr.; Ard, Shaun G.; Shuman, Nicholas S.; Viggiano, Albert A.] Space Vehicles Directorate, Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Li, Anyang; Guo, Hua] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
RP Guo, H (reprint author), Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
EM hguo@unm.edu; afrl.rvborgmailbox@kirtland.af.mil
RI Guo, Hua/J-2685-2014; Li, Anyang/J-2138-2016
OI Guo, Hua/0000-0001-9901-053X; Li, Anyang/0000-0001-6634-842X
FU Air Force Office of Scientific Research [AFOSR-FA9550-15-1-0305,
AFOSR-2303EP]; National Research Council; Boston College Institute of
Scientific Research; Scientific Foundation of Northwest University
[338050068]
FX Support for this work comes from the following sources: H.G.-the Air
Force Office of Scientific Research (Grant No. AFOSR-FA9550-15-1-0305)
and A. A. V.-the Air Force Office of Scientific Research (Grant No.
AFOSR-2303EP). O.M. acknowledges support from the National Research
Council and S.G.A. acknowledges support from the Boston College
Institute of Scientific Research. A.L. acknowledges partial support from
the Scientific Foundation of Northwest University (Grant No. 338050068).
NR 39
TC 3
Z9 3
U1 0
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD SEP 21
PY 2015
VL 143
IS 11
AR 114310
DI 10.1063/1.4931109
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CS1QX
UT WOS:000361843900033
PM 26395708
ER
PT J
AU Guthrie, OW
Wong, BA
McInturf, SM
Reboulet, JE
Ortiz, PA
Mattie, DR
AF Guthrie, O'neil W.
Wong, Brian A.
McInturf, Shawn M.
Reboulet, James E.
Ortiz, Pedro A.
Mattie, David R.
TI INHALATION OF HYDROCARBON JET FUEL SUPPRESS CENTRAL AUDITORY NERVOUS
SYSTEM FUNCTION
SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
LA English
DT Article
ID SPIRAL GANGLION NEURONS; INDUCED HEARING-LOSS; IN-NOISE PERCEPTION;
SPEECH-PERCEPTION; NEUROBEHAVIORAL CAPACITY; NEUROTRANSMITTER LEVELS;
REPEATED EXPOSURE; ORGANIC-SOLVENTS; REPAIR PROTEINS; OLDER-ADULTS
AB More than 800 million L/d of hydrocarbon fuels is used to power cars, boats, and jet airplanes. The weekly consumption of these fuels necessarily puts the public at risk for repeated inhalation exposure. Recent studies showed that exposure to hydrocarbon jet fuel produces lethality in presynaptic sensory cells, leading to hearing loss, especially in the presence of noise. However, the effects of hydrocarbon jet fuel on the central auditory nervous system (CANS) have not received much attention. It is important to investigate the effects of hydrocarbons on the CANS in order to complete current knowledge regarding the ototoxic profile of such exposures. The objective of the current study was to determine whether inhalation exposure to hydrocarbon jet fuel might affect the functions of the CANS. Male Fischer 344 rats were randomly divided into four groups (control, noise, fuel, and fuel + noise). The structural and functional integrity of presynaptic sensory cells was determined in each group. Neurotransmission in both peripheral and central auditory pathways was simultaneously evaluated in order to identify and differentiate between peripheral and central dysfunctions. There were no detectable effects on pre- and postsynaptic peripheral functions. However, the responsiveness of the brain was significantly depressed and neural transmission time was markedly delayed. The development of CANS dysfunctions in the general public and the military due to cumulative exposure to hydrocarbon fuels may represent a significant but currently unrecognized public health issue.
C1 [Guthrie, O'neil W.] No Arizona Univ, Dept Commun Sci & Disorders, Cell & Mol Pathol Lab, Flagstaff, AZ 86011 USA.
[Guthrie, O'neil W.] Loma Linda Vet Affairs Med Ctr, Res Serv, Linda, CA USA.
[Guthrie, O'neil W.] Loma Linda Univ, Med Ctr, Sch Med, Dept Otolaryngol Head & Neck Surg, Loma Linda, CA USA.
[Wong, Brian A.; McInturf, Shawn M.; Reboulet, James E.; Ortiz, Pedro A.] Naval Med Res Unit Dayton, Wright Patterson AFB, OH USA.
[Mattie, David R.] Air Force Res Lab, Mol Bioeffects Branch, Bioeffects Div, Human Effectiveness Directorate, Wright Patterson AFB, OH USA.
RP Guthrie, OW (reprint author), No Arizona Univ, Dept Commun Sci & Disorders, 208 E Pine Knoll Dr,Bldg 66,Room 302, Flagstaff, AZ 86011 USA.
EM Oneil.Guthrie@nau.edu
FU U.S. Air Force [SG5I]; Henry Jackson Foundation for Military Medicine;
Loma Linda Veterans Association for Research and Education; Navy work
unit [61062]
FX This study was supported by the U.S. Air Force Surgeon General (SG5I)
and managed through 711 HPW/RHDJ, Henry Jackson Foundation for Military
Medicine, Loma Linda Veterans Association for Research and Education,
and Navy work unit number 61062.
NR 39
TC 1
Z9 1
U1 1
U2 5
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1528-7394
EI 1087-2620
J9 J TOXICOL ENV HEAL A
JI J. Toxicol. Env. Health Part A
PD SEP 17
PY 2015
VL 78
IS 18
BP 1154
EP 1169
DI 10.1080/15287394.2015.1070389
PG 16
WC Environmental Sciences; Public, Environmental & Occupational Health;
Toxicology
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Toxicology
GA CT5DD
UT WOS:000362826800003
PM 26408153
ER
PT J
AU Rohan, JG
Carhuatanta, KA
McInturf, SM
Miklasevich, MK
Jankord, R
AF Rohan, Joyce G.
Carhuatanta, Kim A.
McInturf, Shawn M.
Miklasevich, Molly K.
Jankord, Ryan
TI Modulating Hippocampal Plasticity with In Vivo Brain Stimulation
SO JOURNAL OF NEUROSCIENCE
LA English
DT Article
DE brain stimulation; extracellular recording; hippocampus; long term
potentiation; rat; tDCS
ID LONG-TERM POTENTIATION; HUMAN MOTOR CORTEX; WORKING-MEMORY; SYNAPTIC
PLASTICITY; POLARIZING CURRENTS; CONTROLLED-TRIAL; CA3-CA1 SYNAPSE; RAT
HIPPOCAMPUS; CEREBRAL CORTEX; BEHAVING MICE
AB Investigations into the use of transcranial direct current stimulation (tDCS) in relieving symptoms of neurological disorders and enhancing cognitive or motor performance have exhibited promising results. However, the mechanisms by which tDCS effects brain function remain under scrutiny. We have demonstrated that in vivo tDCS in rats produced a lasting effect on hippocampal synaptic plasticity, as measured using extracellular recordings. Ex vivo preparations of hippocampal slices from rats that have been subjected to tDCS of 0.10 or 0.25 mA for 30 min followed by 30 min of recovery time displayed a robust twofold enhancement in long-term potentiation (LTP) induction accompanied by a 30% increase in paired-pulse facilitation (PPF). The magnitude of the LTP effect was greater with 0.25 mA compared with 0.10 mA stimulations, suggesting a dose-dependent relationship between tDCS intensity and its effect on synaptic plasticity. To test the persistence of these observed effects, animals were stimulated in vivo for 30 min at 0.25 mA and then allowed to return to their home cage for 24 h. Observation of the enhanced LTP induction, but not the enhanced PPF, continued 24 h after completion of 0.25 mA of tDCS. Addition of the NMDA blocker AP-5 abolished LTP in both control and stimulated rats but maintained the PPF enhancement in stimulated rats. The observation of enhanced LTP and PPF after tDCS demonstrates that non-invasive electrical stimulation is capable of modifying synaptic plasticity.
C1 [Rohan, Joyce G.; McInturf, Shawn M.; Miklasevich, Molly K.] Naval Med Res Unit Dayton, Environm Hlth Effects Directorate, Wright Patterson AFB, OH 45433 USA.
[Carhuatanta, Kim A.; Jankord, Ryan] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Rohan, Joyce G.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA.
[Miklasevich, Molly K.] CAMRIS Int, Bethesda, MD 20814 USA.
RP Rohan, JG (reprint author), Naval Med Res Unit Dayton, Area B,Bldg 837,2729 R St, Wright Patterson AFB, OH 45433 USA.
EM Joyce.Rohan.ctr@us.af.mil
FU Air Force Office of Scientific Research award [13RH14C0R]; National
Research Council
FX This work was supported by the Air Force Office of Scientific Research
award #13RH14C0R, a postdoctoral fellowship award from the National
Research Council, and an appointment to the Postgraduate Research
Participation Program at the Naval Medical Research Unit-Dayton
(NAMRU-D) administered by the Oak Ridge Institute for Science and
Education through an interagency agreement between the U.S. Department
of Energy and NAMRU-D. We thank Naomi Bechmann, Raquel Moore, Kevin
Schmidt, Saline Hughes, and Justin Stafford for their contribution to
this work.
NR 57
TC 13
Z9 13
U1 1
U2 13
PU SOC NEUROSCIENCE
PI WASHINGTON
PA 11 DUPONT CIRCLE, NW, STE 500, WASHINGTON, DC 20036 USA
SN 0270-6474
J9 J NEUROSCI
JI J. Neurosci.
PD SEP 16
PY 2015
VL 35
IS 37
BP 12824
EP 12832
DI 10.1523/JNEUROSCI.2376-15.2015
PG 9
WC Neurosciences
SC Neurosciences & Neurology
GA CU6RC
UT WOS:000363659500019
PM 26377469
ER
PT J
AU Kim, SS
Kuang, ZF
Ngo, YH
Farmer, BL
Naik, RR
AF Kim, Steve S.
Kuang, Zhifeng
Ngo, Yen H.
Farmer, Barry L.
Naik, Rajesh R.
TI Biotic-Abiotic Interactions: Factors that Influence Peptide-Graphene
Interactions
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE graphene; peptides; molecular interactions; QCM; molecular dynamics;
phage display
ID QUARTZ-CRYSTAL MICROBALANCE; MOLECULAR-DYNAMICS; FILMS; SURFACES;
SIMULATIONS; PROTEINS; BINDING; METAL; WATER; FIELD
AB Understanding the factors that influence the interaction between biomolecules and abiotic surfaces is of utmost interest in biosensing and biomedical research. Through phage display technology, several peptides have been identified as specific binders to abiotic material surfaces, such as gold, graphene, silver, and so forth. Using graphene peptide as our model abiotic biotic pair, we investigate the effect of graphene quality, number of layers, and the underlying support substrate effect on graphene peptide interactions using both experiments and computation. Our results indicate that graphene quality plays a significant role in graphene peptide interactions. The graphene biomolecule interaction appears to show no significant dependency on the number of graphene layers or the underlying support substrate.
C1 [Kim, Steve S.; Kuang, Zhifeng; Ngo, Yen H.; Farmer, Barry L.; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Naik, RR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM rajesh.naik@us.af.mil
FU Air Force Office of Scientific Research (AFOSR, LRIR) [12RX11COR]
FX This research was funded by the Air Force Office of Scientific Research
(AFOSR, LRIR #12RX11COR). The authors thank Dr. Varshney and Dr.
Jespersen at AFRL for their helpful discussion and technical assistance,
respectively.
NR 29
TC 6
Z9 6
U1 10
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD SEP 16
PY 2015
VL 7
IS 36
BP 20447
EP 20453
DI 10.1021/acsami.5b06434
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA CR7BA
UT WOS:000361501700067
PM 26305504
ER
PT J
AU Langer, K
Olson, S
Brockman, R
Braisted, W
Spradlin, T
Fitzpatrick, ME
AF Langer, Kristina
Olson, Steven
Brockman, Robert
Braisted, William
Spradlin, Thomas
Fitzpatrick, Michael E.
TI High Strain-Rate Material Model Validation for Laser Peening Simulation
SO JOURNAL OF ENGINEERING-JOE
LA English
DT Article
ID RESIDUAL-STRESSES; SHOCK; DEFORMATION; PREDICTION
AB Finite element modeling can be a powerful tool for predicting residual stresses induced by laser peening; however the sign and magnitude of the stress predictions depend strongly on how the material model captures the high strain rate response. Although a Johnson-Cook formulation is often employed, its suitability for modeling phenomena at very high strain rates has not been rigorously evaluated. In this paper, we address the effectiveness of the Johnson-Cook model, with parameters developed from lower strain rate material data (similar to 10(3) s(-1)), to capture the higher strain rate response (similar to 10(5)-10(6) s(-1)) encountered during the laser peening process. Published Johnson-Cook parameters extracted from split Hopkinson bar testing were used to predict the shock response of aluminum samples during high-impact flyer plate tests. Additional quasi-static and split Hopkinson bar tests were also conducted to study the model response in the lower strain rate regime. The overall objective of the research was to ascertain whether a material model based on conventional test data (quasi-static compression testing and split Hopkinson bar measurements) can credibly be used in FE simulations to predict laser peen-induced stresses.
C1 [Langer, Kristina; Spradlin, Thomas] Air Force Res Lab, AFRL RQVS, Wright Patterson AFB, OH 45433 USA.
[Olson, Steven; Brockman, Robert; Braisted, William] Univ Dayton, Res Lab, Dayton, OH 45469 USA.
[Fitzpatrick, Michael E.] Coventry Univ, Fac Engn & Comp, Coventry CV1 5FB, W Midlands, England.
RP Langer, K (reprint author), Air Force Res Lab, AFRL RQVS, Wright Patterson AFB, OH 45433 USA.
EM michael.fitzpatrick@coventry.ac.uk
NR 30
TC 0
Z9 0
U1 3
U2 3
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 2051-3305
J9 J ENG-JOE
JI J. Eng.-JOE
PD SEP 9
PY 2015
DI 10.1049/joe.2015.0118
PG 8
WC Engineering, Multidisciplinary
SC Engineering
GA DU8FH
UT WOS:000382448200001
ER
PT J
AU Wu, JB
Xi, Y
McCandless, GT
Xie, YH
Menon, R
Patel, Y
Yang, DJ
Iacono, ST
Novak, BM
AF Wu, Jingbo
Xi, Yang
McCandless, Gregory T.
Xie, Yinhuan
Menon, Remya
Patel, Yash
Yang, Duck Joo
Iacono, Scott T.
Novak, Bruce M.
TI Synthesis and Characterization of Partially Fluorinated Polybenzoxazine
Resins Utilizing Octafluorocyclopentene as a Versatile Building Block
SO MACROMOLECULES
LA English
DT Article
ID DIAMINE-BASED BENZOXAZINES; ARYL ETHER POLYMERS; HIGH-PERFORMANCE;
MAIN-CHAIN; MOLECULAR-STRUCTURE; POLYMERIZATION; FILMS; THERMOSETS;
MONOMERS
AB Two new fluorinated diamine-based benzoxazines using octafluorocyclopentene (OFCP) as a building block have been developed. Monomers were synthesized via two distinct synthetic procedures utilizing the facile nucleophilic addition elimination reaction of OFCP with phenols amenable to a multigram scale-up. The structure elucidation of both monomers was confirmed by H-1, F-19, and C-13 NMR, ATR-FTIR, and high-resolution mass spectrometry. Benzoxazine networks were prepared by a thermally mediated ring-opening polymerization. ATR-FTIR analysis was utilized to monitor the ring-opening reaction of the monomers. The resulting two cured resins exhibit the combined excellent properties of low dielectric constants (k = 3.2-2.6), excellent thermal stability, and high char yields which are suitable for many applications such as flame-resistant materials as well as aerospace and microelectronic industries.
C1 [Wu, Jingbo; McCandless, Gregory T.; Xie, Yinhuan; Menon, Remya; Patel, Yash; Yang, Duck Joo; Novak, Bruce M.] Univ Texas Dallas, Dept Chem, Richardson, TX 75080 USA.
[Wu, Jingbo; McCandless, Gregory T.; Xie, Yinhuan; Menon, Remya; Patel, Yash; Yang, Duck Joo; Novak, Bruce M.] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, Richardson, TX 75080 USA.
[Xi, Yang] Univ Texas Dallas, Dept Mat Sci & Engn, Richardson, TX 75080 USA.
[Iacono, Scott T.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
[Iacono, Scott T.] US Air Force Acad, Chem Res Ctr, Colorado Springs, CO 80840 USA.
RP Wu, JB (reprint author), Univ Texas Dallas, Dept Chem, Richardson, TX 75080 USA.
EM wjbsioc2013@gmail.com; scott.iacono@usafa.edu
RI xi, yang/D-5413-2017; Wu, Jingbo/E-6305-2017
OI xi, yang/0000-0002-2779-7895;
FU NMR facility of chemistry department; NSF [CHE-1126177]; University of
Texas at Dallas
FX The authors thank Alan G. MacDiarmid NanoTech Institute, the NMR
facility of chemistry department (NSF, Grant CHE-1126177), and the
University of Texas at Dallas for their support.
NR 51
TC 7
Z9 7
U1 7
U2 59
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
EI 1520-5835
J9 MACROMOLECULES
JI Macromolecules
PD SEP 8
PY 2015
VL 48
IS 17
BP 6087
EP 6095
DI 10.1021/acs.macromol.5b01014
PG 9
WC Polymer Science
SC Polymer Science
GA CR3SP
UT WOS:000361253700006
ER
PT J
AU Gruneisen, MT
Flanagan, MB
Sickmiller, BA
Black, JP
Stoltenberg, KE
Duchane, AW
AF Gruneisen, Mark T.
Flanagan, Michael B.
Sickmiller, Brett A.
Black, James P.
Stoltenberg, Kurt E.
Duchane, Alexander W.
TI Modeling daytime sky access for a satellite quantum key distribution
downlink
SO OPTICS EXPRESS
LA English
DT Article
ID FREE-SPACE; CRYPTOGRAPHY; POLARIZATION; DAYLIGHT
AB Daytime sky radiance can lead to quantum-bit-error rates (QBER) sufficiently high to preclude quantum key distribution over satellite-to-Earth downlinks. For circular orbits, sky radiance and propagation losses are both pointing-angle-dependent quantities. This dependence makes it possible to map the sky as a function of the QBER in certain protocols. Sky radiance distributions are generated by libRadtran software with aerosol values representative of summer and winter. Hemispherical maps of the QBER are created for orbit altitudes of 400 and 800 km. Sunrise-to-sunset simulations are presented for a system with commercial optical components and compared to a case employing an atomic-line spectral filter. (C) 2015 Optical Society of America
C1 [Gruneisen, Mark T.; Duchane, Alexander W.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Flanagan, Michael B.; Sickmiller, Brett A.] Leidos, Albuquerque, NM 87106 USA.
[Black, James P.; Stoltenberg, Kurt E.] Boeing Co, Albuquerque, NM 87185 USA.
RP Gruneisen, MT (reprint author), Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
FU Air Force Office of Scientific Research
FX We gratefully acknowledge Joel Hensley and David Woolf of Physical
Sciences Inc. for technical discussions under AF SBIR Contract No.
FA9451-13-C-0090, Satellite Quantum Communication Using Atomic Line
Filters, and David Mikolajczak of The Boeing Company for generating the
satellite passes shown in Fig. 2. We gratefully acknowledge the
International AERONET Federation for the regional aerosol data made
available through their web site. This work is supported by the Air
Force Office of Scientific Research.
NR 43
TC 1
Z9 1
U1 1
U2 4
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD SEP 7
PY 2015
VL 23
IS 18
BP 23924
EP 23934
DI 10.1364/OE.23.023924
PG 11
WC Optics
SC Optics
GA CS9OG
UT WOS:000362419900083
ER
PT J
AU Hyde, MW
Basu, S
Voelz, DG
Xiao, XF
AF Hyde, Milo W.
Basu, Santasri
Voelz, David G.
Xiao, Xifeng
TI Experimentally generating any desired partially coherent Schell-model
source using phase-only control
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SPATIAL LIGHT MODULATORS; STOCHASTIC ELECTROMAGNETIC BEAMS; PHYSICAL
OPTICS SOLUTION; TURBULENT ATMOSPHERE; CIRCULAR-CYLINDER; VECTOR BEAMS;
SCATTERING; POLARIZATION; PROPAGATION; AMPLITUDE
AB A technique is presented to produce any desired partially coherent Schell-model source using a single phase-only liquid-crystal spatial light modulator (SLM). Existing methods use SLMs in combination with amplitude filters to manipulate the phase and amplitude of an initially coherent source. The technique presented here controls both the phase and amplitude using a single SLM, thereby making the amplitude filters unnecessary. This simplifies the optical setup and significantly increases the utility and flexibility of the resulting system. The analytical development of the technique is presented and discussed. To validate the proposed approach, experimental results of three partially coherent Schell-model sources are presented and analyzed. A brief discussion of possible applications is provided in closing. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Hyde, Milo W.] US Air Force, Dept Elect & Comp Engn, Inst Technol Dayton, Wright Patterson AFB, OH 45433 USA.
[Basu, Santasri] US Air Force, Dept Engn Phys, Inst Technol Dayton, Wright Patterson AFB, OH 45433 USA.
[Voelz, David G.; Xiao, Xifeng] New Mexico State Univ, Klipsch Sch Elect & Comp Engn, Las Cruces, NM 88003 USA.
RP Hyde, MW (reprint author), US Air Force, Dept Elect & Comp Engn, Inst Technol Dayton, Wright Patterson AFB, OH 45433 USA.
EM milo.hyde@afit.edu; santasri.basu.ctr.in@afit.edu; davvoelz@nmsu.edu;
xixiao@nmsu.edu
FU Air Force Office of Scientific Research (AFOSR) Multidisciplinary
Research Program of the University Research Initiative (MURI)
[FA9550-12-1-0449]
FX This work was supported by the Air Force Office of Scientific Research
(AFOSR) Multidisciplinary Research Program of the University Research
Initiative (MURI) Grant No. FA9550-12-1-0449.
NR 72
TC 13
Z9 13
U1 5
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD SEP 7
PY 2015
VL 118
IS 9
AR 093102
DI 10.1063/1.4929811
PG 10
WC Physics, Applied
SC Physics
GA CQ9IE
UT WOS:000360926500002
ER
PT J
AU Harshman, SW
Dershem, VL
Fan, MM
Watts, BS
Slusher, GM
Flory, LE
Grigsby, CC
Ott, DK
AF Harshman, Sean W.
Dershem, Victoria L.
Fan, Maomian
Watts, Brandy S.
Slusher, Grant M.
Flory, Laura E.
Grigsby, Claude C.
Ott, Darrin K.
TI The stability of Tenax TA thermal desorption tubes in simulated field
conditions on the HAPSITE((R)) ER
SO INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
LA English
DT Article
DE air quality; thermal desorption; flight; Tenax TA; HAPSITE((R)) ER
ID VOLATILE ORGANIC-COMPOUNDS; ADSORBENT TUBE; BREAKTHROUGH MEASUREMENTS;
DISCRIMINATE DISEASES; METABOLITE PROFILES; GAS-CHROMATOGRAPHY; FUNGAL
DISEASES; FATTY-ACIDS; AIR; EMISSIONS
AB Due to the growing need to monitor aircraft cabin, cockpit and breathing-line air quality, functional assessment of sampling equipment for the specialised field conditions of flight need to be established for both in-flight and ground safety. In this article, we assess the reliability of Tenax TA thermal desorption tubes to perform under various relevant field sampling conditions, such as storage temperature, loading temperature, vibrational velocity, gravitational force (G Force) and altitude pressure with semi-real-time gas chromatograph-mass spectrometer (GC-MS) analysis on the field portable HAPSITE((R)) ER (Hazardous Air Pollutants on Site Extended Range) instrument. First, we show that Tenax TA thermal desorption tubes can handle storage under extreme environmental conditions, 4-77 degrees C, over numerous analytical test cycles. Next, we confirm that extreme loading temperature, both hot (77 degrees C) and cold (4 degrees C), does not affect the analytical reliability of Tenax TA thermal desorption tubes. Then, we illustrate that G Force may have a significant (p <= 0.0364) effect on Tenax TA performance while vibrational velocity (p <= 0.7265) and low ambient air pressure (p <= 0.1753), such as that found at high altitude, do not. Finally, several Tenax TA thermal desorption tubes were flight-tested, demonstrating that the durability of these tubes maybe insufficient for use on military cargo aircraft (p=0.0107). The results presented here provide a rationale for additional testing of Tenax TA thermal desorption tubes for flight suitability.
C1 [Harshman, Sean W.; Slusher, Grant M.; Flory, Laura E.] UES Inc, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Dershem, Victoria L.; Ott, Darrin K.] Henry M Jackson Fdn Adv Mil Med, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Fan, Maomian; Watts, Brandy S.; Grigsby, Claude C.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Harshman, SW (reprint author), UES Inc, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM sean.harshman.ctr@us.af.mil
FU UES Inc. under United States Air Force [FA8650-14-D-6516]
FX Support for this work was provided by a contract from UES Inc. under
United States Air Force contract FA8650-14-D-6516. Opinions,
interpretations, conclusions and recommendations are those of the
authors and not necessarily endorsed by the United States Government.
NR 44
TC 1
Z9 1
U1 9
U2 14
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0306-7319
EI 1029-0397
J9 INT J ENVIRON AN CH
JI Int. J. Environ. Anal. Chem.
PD SEP 2
PY 2015
VL 95
IS 11
BP 1014
EP 1029
DI 10.1080/03067319.2015.1077520
PG 16
WC Chemistry, Analytical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA CR2UY
UT WOS:000361187400005
ER
PT J
AU Schumacher, PW
Sabol, C
Higginson, CC
Alfriend, KT
AF Schumacher, Paul W., Jr.
Sabol, Chris
Higginson, Clayton C.
Alfriend, Kyle T.
TI Uncertain Lambert Problem
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID ORBIT DETERMINATION; TRANSFORMATION; PROPAGATION
AB This analysis addresses the problem of constructing uncertainties in initial and final satellite orbital state vectors that are dynamically consistent in Lambert's boundary-value problem, given uncertainties in the initial and final position vectors. The structure of the general nonlinear problem is discussed in terms of transformations of the probability density functions of the given positions. For the linear (first-order) variational version of the problem, the covariance matrices of the state variations are presented in explicit terms of the covariance matrix of the given position variations and partitions of the state transition matrix of the nominal orbit. Equivalence is demonstrated between the linear variational results, which involve no iteration, and a weighted batch least-squares differential-correction solution of the orbit determination problem. To illustrate the utility of the working formulas in the linear variational problem, two approaches are taken: 1)an analytic approach to solve directly for the covariance terms, based on linearized dynamics, and 2)a numerical MonteCarlo-based approach that generates a sample covariance. The numerical results for state covariance from the analytic approach agree with results obtained by batch least-squares differential correction, and both agree with results from the MonteCarlo approach to within differences explainable by the limitations of sampling.
C1 [Schumacher, Paul W., Jr.; Sabol, Chris] US Air Force, Res Lab, Kihei, HI 96753 USA.
[Higginson, Clayton C.] US Air Force Acad, Colorado Springs, Colorado Springs, CO 80840 USA.
[Alfriend, Kyle T.] Texas A&M Univ, College Stn, TX 77843 USA.
RP Schumacher, PW (reprint author), US Air Force, Res Lab, Kihei, HI 96753 USA.
FU U.S. Air Force Research Laboratory Commander's Research Discretionary
Fund; U.S. Department of Defense High Performance Computing
Modernization Program's Summer Cadet Research Program
FX This work was supported by the U.S. Air Force Research Laboratory
Commander's Research Discretionary Fund and by the U.S. Department of
Defense High Performance Computing Modernization Program's Summer Cadet
Research Program. The authors thank R. H. Battin for sharing his
contagious love for mathematics and astrodynamics.
NR 17
TC 2
Z9 2
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP
PY 2015
VL 38
IS 9
SI SI
BP 1573
EP 1584
DI 10.2514/1.G001019
PG 12
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CS1LV
UT WOS:000361827900005
ER
PT J
AU DeMars, KJ
Hussein, II
Frueh, C
Jah, MK
Erwin, RS
AF DeMars, Kyle J.
Hussein, Islam I.
Frueh, Carolin
Jah, Moriba K.
Erwin, R. Scott
TI Multiple-Object Space Surveillance Tracking Using Finite-Set Statistics
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID HYPOTHESIS DENSITY FILTER; UNCERTAINTY PROPAGATION; ORBIT DETERMINATION;
INFORMATION; ENTROPY; SYSTEMS; MODELS
AB The dynamic tracking of objects is, in general, concerned with state estimation using imperfect data. Multiple object tracking adds the difficulty of encountering unknown associations between the collected data and the objects. State estimation of objects necessitates the prediction of uncertainty through nonlinear (in the general case) dynamical systems and the processing of nonlinear (in the general case) measurement data in order to provide corrections that refine the system uncertainty, where the uncertainty may be non-Gaussian in nature. The sensors, which provide the measurement data, are imperfect with possible misdetections, false alarms, and noise-affected data. The resulting measurements are inherently unassociated upon reception. In this paper, a Bayesian method for tracking an arbitrary, but known, number of objects is developed. The method is based on finite-set statistics coupled with finite mixture model representations of the multiobject probability density function. Instead of relying on first-moment approximations, such as the probability hypothesis density filter, to the full multiobject Bayesian posterior, as is often done for multiobject filtering, the proposed method operates directly on the exact Bayesian posterior. Results are presented for application of the method to the problem of tracking multiple space objects using synthetic line-of-sight data.
C1 [DeMars, Kyle J.] Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO 65409 USA.
[Hussein, Islam I.] Appl Def Solut, Columbia, MD 21044 USA.
[Frueh, Carolin] Purdue Univ, Sch Aeronaut & Astronautics, W Lafayette, IN 47907 USA.
[Jah, Moriba K.; Erwin, R. Scott] US Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP DeMars, KJ (reprint author), Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO 65409 USA.
FU U.S. Air Force Office of Scientific Research; National Research Council
FX The authors would like to acknowledge the financial support of the U.S.
Air Force Office of Scientific Research and the National Research
Council. This paper is approved for public release: 377ABW-2014-0581.
NR 19
TC 5
Z9 5
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP
PY 2015
VL 38
IS 9
SI SI
BP 1741
EP 1756
DI 10.2514/1.G000987
PG 16
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CS1LV
UT WOS:000361827900017
ER
PT J
AU Sinclair, AJ
Sherrill, RE
Lovell, TA
AF Sinclair, Andrew J.
Sherrill, Ryan E.
Lovell, T. Alan
TI Use of Cartesian-Coordinate Calibration for Satellite Relative-Motion
Control
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID NONLINEARITY; DYNAMICS
C1 [Sinclair, Andrew J.] Auburn Univ, Dept Aerosp Engn, 211 Davis Hall, Auburn, AL 36849 USA.
[Sherrill, Ryan E.] Engil Corp, Engn & Program Management Group, Eglin AFB, FL USA.
[Lovell, T. Alan] Space Vehicles Directorate, Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Sinclair, AJ (reprint author), Auburn Univ, Dept Aerosp Engn, 211 Davis Hall, Auburn, AL 36849 USA.
RI Sinclair, Andrew/H-2156-2013
NR 18
TC 0
Z9 0
U1 0
U2 3
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP
PY 2015
VL 38
IS 9
SI SI
BP 1842
EP 1846
DI 10.2514/1.G000683
PG 5
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CS1LV
UT WOS:000361827900028
ER
PT J
AU Li, F
Choudhari, M
Chang, CL
Kimmel, R
Adamczak, D
Smith, M
AF Li, Fei
Choudhari, Meelan
Chang, Chau-Lyan
Kimmel, Roger
Adamczak, David
Smith, Mark
TI Transition Analysis for the Ascent Phase of HIFiRE-1 Flight Experiment
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID GROUND TEST
AB The HIFiRE-1 flight experiment provided a valuable database for boundary-layer transition over a 7deg half-angle, circular cone model from supersonic to hypersonic Mach numbers as well as a range of Reynolds numbers and angles of incidence. This paper reports the findings from a computational analysis of the measured in-flight transition behavior during the ascent phase. Given a nearly zero angle of attack, computations indicate that the most likely cause for transition during the flight window of 19 to 22.5s is the amplification of second-mode instabilities in the laminar boundary layer, except in the vicinity of the cone meridian, where a roughness element was placed midway along the length of the cone. The growth of first-mode instabilities is found to be weak at all trajectory points analyzed from the ascent phase. Based on the time histories of temperature and/or heat flux at transducer locations within the aft portion of the cone, the onset of transition across the aforementioned window is found to correlate with an average linear N-factor, based on parabolized stability equations, of approximately 13.3. For times less than approximately 18s into the flight, the peak amplification ratio for second-mode disturbances is too small to cause transition because of the lower Mach numbers at earlier times. Therefore, the observed transition at these times is attributed to an unknown physical mechanism that is potentially related to the step discontinuities in surface height near the changes in surface material.
C1 [Li, Fei; Choudhari, Meelan; Chang, Chau-Lyan] NASA, Langley Res Ctr, Computat AeroSci Branch, MS 128, Hampton, VA 23681 USA.
[Kimmel, Roger; Adamczak, David] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Smith, Mark] NASA, Armstrong Res Ctr, Aerodynam & Prop Branch, Edwards AFB, CA 93523 USA.
RP Li, F (reprint author), NASA, Langley Res Ctr, Computat AeroSci Branch, MS 128, Hampton, VA 23681 USA.
NR 8
TC 2
Z9 2
U1 3
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD SEP
PY 2015
VL 52
IS 5
BP 1283
EP 1293
DI 10.2514/1.A33258
PG 11
WC Engineering, Aerospace
SC Engineering
GA CS1RM
UT WOS:000361845400002
ER
PT J
AU Showalter, DJ
Black, JT
AF Showalter, Daniel J.
Black, Jonathan T.
TI Optimal Continuous-Thrust Responsive Theater Maneuvers
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID ASSIST TRAJECTORIES OPTIMIZATION; PARTICLE SWARM OPTIMIZATION; HYBRID
GENETIC ALGORITHM; PSEUDOSPECTRAL METHODS; DESIGN
AB This research investigates a continuous-thrust implementation of the responsive theater maneuver, which is designed to alter a spacecraft's entry conditions as it overflies a specified geographic region, called the exclusion zone. A particle swarm optimization algorithm employing shape-based continuous-thrust trajectory approximation is used to seed a direct orthogonal collocation routine employing a nonlinear programming problem solver. This approach is used to generate optimal continuous-thrust responsive theater maneuver trajectories. The combination of particle swarm optimization, shape-based continuous-thrust trajectory approximation, and direct orthogonal collocation is shown to generate fuel-optimal trajectories for single-, double-, and triple-pass cases of the responsive theater maneuver problem. Further, these continuous-thrust trajectories are shown to satisfy the analytical necessary conditions for an optimal control and require delta velocities only slightly larger than those required for impulsive responsive theater maneuvers delivering the same effects. As continuous-thrust propulsion technology improves, the continuous-thrust responsive theater maneuvers can provide propellant mass expenditure savings over their impulsive counterparts despite requiring more delta velocity.
C1 [Showalter, Daniel J.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Black, Jonathan T.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Aerosp Engn, Wright Patterson AFB, OH 45433 USA.
RP Showalter, DJ (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RI Black, Jonathan/R-4875-2016
OI Black, Jonathan/0000-0001-9315-3994
NR 34
TC 0
Z9 0
U1 2
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD SEP
PY 2015
VL 52
IS 5
BP 1375
EP 1387
DI 10.2514/1.A33108
PG 13
WC Engineering, Aerospace
SC Engineering
GA CS1RM
UT WOS:000361845400010
ER
PT J
AU Hausgen, PE
Carpenter, B
AF Hausgen, Paul E.
Carpenter, Bernie
TI Value of Solar Array Technology Advancement
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
AB In making investment decisions for spacecraft technology development, it is critical to understand how such advances impact spacecraft budgets such as mass, volume, and power. Beneficial effects on spacecraft budgets translate into improved payload capability and/or reduced spacecraft cost. Reduced cost and improved capability are central goals for the space enterprise, including both military and commercial entities. This work systematically evaluates the effect of increasing solar array performance on spacecraft mass, volume, power, and cost budgets for three assumed missions: low Earth orbit (3kW), medium Earth orbit (10kW), and geostationary Earth orbit (20kW). Solar array metrics used to quantify improved solar array performance are specific power (watts per kilogram), stowed power density (kilowatts per cubic meter), and solar cell efficiency (percent). Changes in solar array metrics are translated into the effect on spacecraft mass, volume, power, and cost budgets for the three assumed missions. Although the results presented are anchored to an assumed mission set with an associated baseline solar array design, the trends are applicable to any mission set and can easily be extended and adjusted based on a different baseline set of solar array design parameters.
C1 [Hausgen, Paul E.] US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Carpenter, Bernie] Aerosp Corp, Space Innovat Directorate, 2155 Louisiana St NE, Albuquerque, NM 87110 USA.
RP Hausgen, PE (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD SEP
PY 2015
VL 52
IS 5
BP 1388
EP 1394
DI 10.2514/1.A33324
PG 7
WC Engineering, Aerospace
SC Engineering
GA CS1RM
UT WOS:000361845400011
ER
PT J
AU Wiebe, R
Stanciulescu, I
AF Wiebe, Richard
Stanciulescu, Ilinca
TI Inconsistent Stability of Newmark's Method in Structural Dynamics
Applications
SO JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
LA English
DT Article
AB The stability of numerical time integrators, and of the physical systems to which they are applied, are normally studied independently. This conceals a very interesting phenomenon, here termed inconsistent stability, wherein a numerical time marching scheme predicts a stable response about an equilibrium configuration that is, in fact, unstable. In this paper, time integrator parameters leading to possible inconsistent stability are first found analytically for conservative systems (symmetric tangent stiffness matrices), then several structural arches with increasing complexity are used as numerical case studies. The intention of this work is to highlight the potential for this unexpected, and mostly unknown, behavior to researchers studying complex dynamical systems, especially through time marching of finite element models. To allow for direct interpretation of our results, the work is focused on the Newmark time integrator, which is commonly used in structural dynamics.
C1 [Wiebe, Richard] Air Force Res Lab, Struct Sci Ctr, Wright Patterson AFB, OH 45433 USA.
[Stanciulescu, Ilinca] Rice Univ, Ryon Lab 208, MS 318,6100 Main St, Houston, TX 77005 USA.
RP Stanciulescu, I (reprint author), Rice Univ, Ryon Lab 208, MS 318,6100 Main St, Houston, TX 77005 USA.
EM rwiebe@co.uw.edu; ilinca.s@rice.edu
FU Universal Technology Corporation (UTC) [FA8650-10-D-3037]; High
Performance Technologies, Inc. (HPTI) PETTT Grant [BY13-020SP]
FX The authors acknowledge the support of Universal Technology Corporation
(UTC) Contract No. FA8650-10-D-3037, and High Performance Technologies,
Inc. (HPTI) PETTT Grant No. BY13-020SP.
NR 11
TC 0
Z9 0
U1 1
U2 1
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1555-1423
EI 1555-1415
J9 J COMPUT NONLIN DYN
JI J. Comput. Nonlinear Dyn.
PD SEP
PY 2015
VL 10
IS 5
AR 051006
DI 10.1115/1.4028221
PG 8
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA DC2TW
UT WOS:000369070700007
ER
PT J
AU Ree, MJ
Carretta, TR
Teachout, MS
AF Ree, Malcolm James
Carretta, Thomas R.
Teachout, Mark S.
TI Pervasiveness of Dominant General Factors in Organizational Measurement
SO INDUSTRIAL AND ORGANIZATIONAL PSYCHOLOGY-PERSPECTIVES ON SCIENCE AND
PRACTICE
LA English
DT Article
DE general factors; dominant general factors
ID CONFIRMATORY FACTOR-ANALYSIS; OFFICER QUALIFYING TEST; CORE
SELF-EVALUATIONS; EMOTIONAL INTELLIGENCE; INDIVIDUAL-DIFFERENCES;
INCREMENTAL VALIDITY; JOB-PERFORMANCE; FORMING IMPRESSIONS;
COGNITIVE-ABILITY; SCALE DEVELOPMENT
AB General factors are found in the measurement of many human traits. The concept of dominant general factors (DGFs) is introduced to represent the magnitude of general factors within numerous content domains. DGFs are defined as coming from the largest sources of reliable variance and influencing every variable measuring the construct. Although these factors are most frequently found in measures of cognitive ability, they are not limited to cognitive abilities. Examples are provided for a variety of construct and content domains along with estimates of their DGF percentages, ranging from 38% to 92%. Several reasons for these results are offered, and a call for concerted research is made. Research that ignores DGFs by treating specific factors or constructs within a domain as if they were distinct and uncorrelated can lead to errors in interpretation.
C1 [Ree, Malcolm James] Our Lady Lake Univ, Sch Business & Leadership, Dept Leadership Studies, San Antonio, TX 78207 USA.
[Carretta, Thomas R.] Air Force Res Lab, Warfighter Interface Div, Supervisory Control & Cognit Branch, Wright Patterson AFB, OH USA.
[Teachout, Mark S.] Univ Incarnate Word, HEB Sch Business & Adm, San Antonio, TX USA.
RP Ree, MJ (reprint author), Our Lady Lake Univ, Sch Business & Leadership, 411 Southwest 24th St, San Antonio, TX 78207 USA.
EM malcolmree@att.net
NR 85
TC 12
Z9 12
U1 1
U2 3
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 1754-9426
EI 1754-9434
J9 IND ORGAN PSYCHOL-US
JI Ind. Organ. Psychol.
PD SEP
PY 2015
VL 8
IS 3
BP 409
EP 427
DI 10.1017/iop.2015.16
PG 19
WC Psychology, Applied
SC Psychology
GA DB2MP
UT WOS:000368343300018
ER
PT J
AU Thompson, ER
Iyer, N
Simpson, BD
Wakefield, GH
Kieras, DE
Brungart, DS
AF Thompson, Eric R.
Iyer, Nandini
Simpson, Brian D.
Wakefield, Gregory H.
Kieras, David E.
Brungart, Douglas S.
TI Enhancing listener strategies using a payoff matrix in speech-on-speech
masking experiments
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID ACROSS-EAR INTERFERENCE; INFORMATIONAL MASKING; SIMULTANEOUS TALKERS;
PERCEPTION; TASK; SIMILARITY; CORPUS; NOISE
AB Speech recognition was measured as a function of the target-to-masker ratio (TMR) with syntactically similar speech maskers. In the first experiment, listeners were instructed to report keywords from the target sentence. Data averaged across listeners showed a plateau in performance below 0 dB TMR when masker and target sentences were from the same talker. In this experiment, some listeners tended to report the target words at all TMRs in accordance with the instructions, while others reported keywords from the louder of the sentences, contrary to the instructions. In the second experiment, stimuli were the same as in the first experiment, but listeners were also instructed to avoid reporting the masker keywords, and a payoff matrix penalizing masker keywords and rewarding target keywords was used. In this experiment, listeners reduced the number of reported masker keywords, and increased the number of reported target keywords overall, and the average data showed a local minimum at 0 dB TMR with same-talker maskers. The best overall performance with a same-talker masker was obtained with a level difference of 9 dB, where listeners achieved near perfect performance when the target was louder, and at least 80% correct performance when the target was the quieter of the two sentences.
C1 [Thompson, Eric R.; Iyer, Nandini; Simpson, Brian D.] Air Force Res Lab, Battlespace Acoust Branch, 2610 Seventh St B441, Wright Patterson AFB, OH 45433 USA.
[Wakefield, Gregory H.; Kieras, David E.] Univ Michigan, Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA.
[Brungart, Douglas S.] Walter Reed Natl Mil Med Ctr, Bethesda, MD 20889 USA.
RP Thompson, ER (reprint author), Air Force Res Lab, Battlespace Acoust Branch, 2610 Seventh St B441, Wright Patterson AFB, OH 45433 USA.
EM eric.thompson.28@us.af.mil
FU Air Force Office of Sponsored Research (AFOSR); Office of Naval Research
(ONR) [N00014-13-1-0358]
FX This research was supported by grants from the Air Force Office of
Sponsored Research (AFOSR) (N.I. and B.D.S.) and the Office of Naval
Research (ONR) (Grant No. N00014-13-1-0358) (G.H.W. and D.E.K.).
NR 19
TC 1
Z9 1
U1 0
U2 2
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
EI 1520-8524
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD SEP
PY 2015
VL 138
IS 3
BP 1297
EP 1304
DI 10.1121/1.4928395
PG 8
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA DB6RX
UT WOS:000368643800036
PM 26428768
ER
PT J
AU Suthersan, S
Carroll, P
Schnobrich, M
Horst, J
Potter, S
Peters, L
AF Suthersan, Suthan
Carroll, Paul
Schnobrich, Matthew
Horst, John
Potter, Scott
Peters, Lynden
TI Cleaning Up a 3-Mile-Long Groundwater Plume: It Can Be Done
SO GROUND WATER MONITORING AND REMEDIATION
LA English
DT Article
C1 [Suthersan, Suthan] ARCADIS NA, Newtown, PA 18940 USA.
[Carroll, Paul] US Air Force, Civil Engn Ctr, BRAC Execut, Washington, DC USA.
[Schnobrich, Matthew] ARCADIS US, Houston, TX USA.
[Schnobrich, Matthew] Remediat Co, Golden, CO USA.
[Horst, John] ARCADIS NA, Tech Serv, Newtown, PA 18940 USA.
[Potter, Scott] ARCADIS US Inc, Newtown, PA 18940 USA.
RP Suthersan, S (reprint author), ARCADIS NA, 10 Friends Lane,Suite 200, Newtown, PA 18940 USA.
EM suthan.suthersan@arcadis-us.com; paul.car-roll.1@us.af.mil;
matthew.schnobrich@arcadis-us.com; john.horst@arcadis-us.com;
scott.potter@arcadis-us.com; lynden.peters@arcadis-us.com
NR 5
TC 1
Z9 1
U1 1
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1069-3629
EI 1745-6592
J9 GROUND WATER MONIT R
JI Ground Water Monit. Remediat.
PD FAL
PY 2015
VL 35
IS 4
BP 27
EP 35
DI 10.1111/gwmr.12139
PG 9
WC Water Resources
SC Water Resources
GA DA3BK
UT WOS:000367670700016
ER
PT J
AU Coletta, D
AF Coletta, Damon
TI US Presidents and the Militarization of Space, 1946-1967
SO JOURNAL OF COLD WAR STUDIES
LA English
DT Book Review
C1 [Coletta, Damon] US Air Force Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
RP Coletta, D (reprint author), US Air Force Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 2
U2 2
PU MIT PRESS
PI CAMBRIDGE
PA ONE ROGERS ST, CAMBRIDGE, MA 02142-1209 USA
SN 1520-3972
EI 1531-3298
J9 J COLD WAR STUD
JI J. Cold War Stud.
PD FAL
PY 2015
VL 17
IS 4
BP 184
EP 186
PG 3
WC History; International Relations; Political Science
SC History; International Relations; Government & Law
GA DA3UY
UT WOS:000367725900013
ER
PT J
AU Hu, X
Wan, H
Patnaik, SS
AF Hu, Xin
Wan, Hui
Patnaik, Soumya S.
TI Numerical modeling of heat transfer in open-cell micro-foam with phase
change material
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Phase change material; Micro-foam structure; Direct numerical
simulations; Volume-averaged simulations
ID EFFECTIVE THERMAL-CONDUCTIVITY; POROSITY METAL FOAMS; POROUS-MEDIA;
CARBON FOAMS; NATURAL-CONVECTION; ENERGY STORAGE; ALUMINUM FOAMS;
INTERNAL FINS; SINKS; SIMULATION
AB The heat transfer behavior of micro-foam impregnated with phase change material (PCM) was investigated. Both microscopic and macroscopic modeling approaches were considered. An open-cell PCM/micro-foam structure under constant heat flux was modeled using an ideal micro-foam structure based on a cubic unit cell with spherical micro-pores arranged in a BCC lattice. Results from direct numerical simulations (DNS) which take into account the intricate foam geometry were compared with those from one- and two-temperature volume-averaged simulations. The enthalpy-porosity method was used for phase change and conjugated heat transfer was applied at the PCM/micro-foam interface. The DNS simulations provided insight into the complicated heat transfer and a three-dimensional PCM melting front and temperature distribution was observed. Along with serving as a benchmark for the less computationally expensive volume average methods, the DNS results were also used to extract thermo-physical parameters such as effective thermal conductivity and interstitial heat transfer coefficients. These coefficients were subsequently used in the volume averaged simulations. The choice of the effective thermal conductivity of the PCM/micro-foam structure was found to be crucial in matching the temperature profile and liquid PCM volume fraction results from volume averaged simulations and DNS. Effective thermal conductivity values based on the nonlinear Progelhoff model with power factor derived from DNS were found to provide an improvement over the more widely used value based on the arithmetic mean. Published by Elsevier Ltd.
C1 [Hu, Xin; Wan, Hui] UES Inc, Dayton, OH 45432 USA.
[Hu, Xin; Wan, Hui; Patnaik, Soumya S.] US Air Force, Res Lab, Mech & Thermal Syst Branch, Power & Control Div,Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Patnaik, SS (reprint author), US Air Force, Res Lab, Mech & Thermal Syst Branch, Power & Control Div,Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM soumya.patnaik.1@us.af.mil
FU Air Force Office of Scientific Research Thermal Science Program;
Department of Defense Supercomputing Resource Center
FX The authors gratefully acknowledge funding from the Air Force Office of
Scientific Research Thermal Science Program and the Department of
Defense Supercomputing Resource Center for computing time and resources.
NR 37
TC 5
Z9 5
U1 7
U2 24
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
EI 1879-2189
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD SEP
PY 2015
VL 88
BP 617
EP 626
DI 10.1016/j.ijheatmasstransfer.2015.04.044
PG 10
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA CW2DZ
UT WOS:000364802600062
ER
PT J
AU Blasch, E
Kostek, P
Paces, P
Kramer, K
AF Blasch, Erik
Kostek, Paul
Paces, Pavel
Kramer, Kathleen
TI Summary of Avionics Technologies
SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
LA English
DT Article
ID EVOLUTION
C1 [Blasch, Erik] Air Force Res Lab, Rome, NY 13441 USA.
[Kostek, Paul] Air Direct Solut, Seattle, WA 98103 USA.
[Paces, Pavel] Czech Tech Univ, Tech 2, Prague 16627 6, Czech Republic.
[Kramer, Kathleen] Univ San Diego, San Diego, CA 92110 USA.
RP Blasch, E (reprint author), Air Force Res Lab, 525 Brooks Rd, Rome, NY 13441 USA.
EM erik.blasch@gmail.com; p.kostek@ieee.org; pacesp@fel.cvut.cz;
kramer@sandiego.edu
NR 12
TC 4
Z9 4
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8985
EI 1557-959X
J9 IEEE AERO EL SYS MAG
JI IEEE Aerosp. Electron. Syst. Mag.
PD SEP
PY 2015
VL 30
IS 9
BP 6
EP 11
DI 10.1109/MAES.2015.150012
PG 6
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA CW5OI
UT WOS:000365045300002
ER
PT J
AU Leuchter, J
Stekly, V
Blasch, E
AF Leuchter, Jan
Stekly, Vitezslav
Blasch, Erik
TI Investigation of Avionics Power Switch Loading Versus Aircraft
Electromagnetic Compatibility
SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
LA English
DT Article
ID CONVERTERS; DESIGN
C1 [Leuchter, Jan; Stekly, Vitezslav] Univ Def, Brno 66210, Czech Republic.
[Blasch, Erik] Air Force Res Lab, Rome, NY USA.
RP Leuchter, J (reprint author), Univ Def, Dept Elect Engn, Kounicova 65, Brno 66210, Czech Republic.
EM Erik.Blasch@gmail.com
NR 32
TC 1
Z9 1
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0885-8985
EI 1557-959X
J9 IEEE AERO EL SYS MAG
JI IEEE Aerosp. Electron. Syst. Mag.
PD SEP
PY 2015
VL 30
IS 9
BP 24
EP 34
DI 10.1109/MAES.2015.140224
PG 11
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA CW5OI
UT WOS:000365045300004
ER
PT J
AU Macdonald, PA
AF Macdonald, Paul A., Jr.
TI Hell, the Problem of Evil, and the Perfection of the Universe
SO AMERICAN CATHOLIC PHILOSOPHICAL QUARTERLY
LA English
DT Article
ID GOD
AB In this article, I address the question why God would create a world with damned human beings in it when (presumably) he could create a better world without damned human beings. Specifically, I explain and defend what I call the "perfection of the universe argument." According to this argument, which is Augustinian and Thomistic in origin, it is entirely and equally consistent with divine goodness for God to create a world with damned human beings in it or a damnation-free world so long as God ensures that each world is good as a whole. I then respond to two different objections to this argument. Finally, I show how the perfection of the universe argument leaves room for hoping that we live in a world in which no human being is damned and God affords every human being a life that is good as a whole.
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Macdonald, PA (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 18
TC 0
Z9 0
U1 1
U2 1
PU AMER CATHOLIC PHILOSOPHICAL ASSOC
PI BRONX
PA C/O FORDHAM UNIV, BRONX, NY 10458 USA
SN 1051-3558
EI 2153-8441
J9 AM CATH PHILOS QUART
JI Am. Cath. Philos. Q.
PD FAL
PY 2015
VL 89
IS 4
BP 603
EP 628
DI 10.5840/acpq20159465
PG 26
WC Philosophy
SC Philosophy
GA CV9IL
UT WOS:000364600800003
ER
PT J
AU Beltran, SDT
Cutchin, S
White, S
AF Beltran, Samuel D. Tun
Cutchin, S.
White, S.
TI A New Look at Type-III Bursts and Their Use as Coronal Diagnostics
SO SOLAR PHYSICS
LA English
DT Article
DE Corona, radio emission; Radio bursts, dynamic spectrum; Radio bursts,
type III; Waves, plasma
ID SOLAR RADIO-BURSTS; SPATIAL VARIATIONS; ELECTRON; TEMPERATURES; BEAMS
AB We present meter-wave solar radio spectra of the highest spectro-temporal resolution achieved to date. The observations, obtained with the first station of the Long Wavelength Array (LWA1), show unprecedented detail of solar emissions across a wide bandwidth during a Type-III/IIIb storm. Our flux calibration demonstrates that the LWA1 can detect Type-III bursts much weaker than 1 SFU, much lower than previous observations, and that the distribution of fluxes in these bursts varies with frequency. The high sensitivity and low noise in the data provide strong constraints to models of this type of plasma emission, providing evidence against the idea that Type-IIIb striae are generated from electrons trapped in Langmuir-wave sidebands. The continuous generation of electron beams in the corona revealed by the high density Type-III storm is evidence for ubiquitous magnetic reconnection in the lower corona. Such an abundance of reconnection events not only contributes to the total coronal energy budget, but also provides an engine by which to form the populations of seed particles responsible for proton-rich solar energetic-particle events. An active region (AR) with such levels of reconnection and the accompanying Type-III/IIIb storms is proposed here to be associated with an increase of SEP production if a CME erupts. The data's constraints on existing theories of Type-IIIb production are used to make an association of the observed Type-IIIb storm to specific electron-beam paths with increased inhomogeneities in density, temperature, and/or turbulence. This scenario ties in the observed timing of Type-III and -IIIb storms, constrained theories of Type-III and -IIIb emission, and the ability of the emitting AR to produce a strong SEP event. The result requires but a single observable to cement these ideas, the statistical correlation of Type-III/IIIb activity with SEP-productive AR.
C1 [Beltran, Samuel D. Tun; Cutchin, S.] Naval Res Lab, Washington, DC 20375 USA.
[White, S.] Air Force Res Lab, Space Vehicles Div, Albuquerque, NM USA.
RP Beltran, SDT (reprint author), Naval Res Lab, Washington, DC 20375 USA.
EM Samuel.TunBeltran@nrl.navy.mil
FU Office of Naval Research [N00014-07-C-0147]; National Science Foundation
[AST-1139963, AST-1139974]
FX S. Tun Beltran would like to thank A. Vourlidas and M. Laming for
critical discussions of the work, and further express gratitude to the
National Academies of Science. The bulk of this work was carried out
while he was a National Research Council Fellow at the Naval Research
Laboratory. The work was finalized under NRL's Karles Fellowship. Many
thanks as well to the LWA1 team, who greatly facilitated the hosting and
processing of data for this work. Construction of LWA1 was supported by
the Office of Naval Research under Contract N00014-07-C-0147. Support
for operations and continuing development of LWA1 is provided by the
National Science Foundation under grants AST-1139963 and AST-1139974 of
the University Radio Observatories program.
NR 23
TC 0
Z9 0
U1 2
U2 4
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
EI 1573-093X
J9 SOL PHYS
JI Sol. Phys.
PD SEP
PY 2015
VL 290
IS 9
BP 2423
EP 2437
DI 10.1007/s11207-015-0760-6
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CU7MX
UT WOS:000363725300004
ER
PT J
AU Laws, KJ
Miracle, DB
Ferry, M
AF Laws, K. J.
Miracle, D. B.
Ferry, M.
TI A predictive structural model for bulk metallic glasses
SO NATURE COMMUNICATIONS
LA English
DT Article
ID FORMING ABILITY; THERMAL-STABILITY; AMORPHOUS-ALLOYS; ATOMIC PACKING;
VOLUME CHANGE; ZR; LIQUIDS; SYSTEMS; DENSITY; ORDER
AB Great progress has been made in understanding the atomic structure of metallic glasses, but there is still no clear connection between atomic structure and glass-forming ability. Here we give new insights into perhaps the most important question in the field of amorphous metals: how can glass-forming ability be predicted from atomic structure? We give a new approach to modelling metallic glass atomic structures by solving three long-standing problems: we discover a new family of structural defects that discourage glass formation; we impose efficient local packing around all atoms simultaneously; and we enforce structural self-consistency. Fewer than a dozen binary structures satisfy these constraints, but extra degrees of freedom in structures with three or more different atom sizes significantly expand the number of relatively stable, 'bulk' metallic glasses. The present work gives a new approach towards achieving the long-sought goal of a predictive capability for bulk metallic glasses.
C1 [Laws, K. J.; Ferry, M.] UNSW Australia, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia.
[Miracle, D. B.] Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Miracle, DB (reprint author), Mat & Mfg Directorate, Air Force Res Lab, 2230 Tenth St, Wright Patterson AFB, OH 45433 USA.
EM daniel.miracle@us.af.mil
FU Australian Research Council
FX We thank O.N. Senkov for critical comments on this manuscript. We also
acknowledge the contributions of K. Shamlaye in assisting with
supporting data in Supplementary Information and reviewing the
manuscript. K.J.L. would like to thank the Australian Research Council
for the funding of this and associated projects.
NR 60
TC 17
Z9 17
U1 21
U2 86
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2015
VL 6
AR 8123
DI 10.1038/ncomms9123
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CT6UZ
UT WOS:000362949200001
PM 26370667
ER
PT J
AU Potyrailo, RA
Bonam, RK
Hartley, JG
Starkey, TA
Vukusic, P
Vasudev, M
Bunning, T
Naik, RR
Tang, ZX
Palacios, MA
Larsen, M
Le Tarte, LA
Grande, JC
Zhong, S
Deng, T
AF Potyrailo, Radislav A.
Bonam, Ravi K.
Hartley, John G.
Starkey, Timothy A.
Vukusic, Peter
Vasudev, Milana
Bunning, Timothy
Naik, Rajesh R.
Tang, Zhexiong
Palacios, Manuel A.
Larsen, Michael
Le Tarte, Laurie A.
Grande, James C.
Zhong, Sheng
Deng, Tao
TI Towards outperforming conventional sensor arrays with fabricated
individual photonic vapour sensors inspired by Morpho butterflies
SO NATURE COMMUNICATIONS
LA English
DT Article
ID ELECTRON-BEAM LITHOGRAPHY; OPTOELECTRONIC NOSE; CHEMICAL SENSORS;
SILICON FILMS; BRAGG MIRRORS; CRYSTALS; DESIGN; DIFFRACTION; SCALES;
COLOR
AB Combining vapour sensors into arrays is an accepted compromise to mitigate poor selectivity of conventional sensors. Here we show individual nanofabricated sensors that not only selectively detect separate vapours in pristine conditions but also quantify these vapours in mixtures, and when blended with a variable moisture background. Our sensor design is inspired by the iridescent nanostructure and gradient surface chemistry of Morpho butterflies and involves physical and chemical design criteria. The physical design involves optical interference and diffraction on the fabricated periodic nanostructures and uses optical loss in the nanostructure to enhance the spectral diversity of reflectance. The chemical design uses spatially controlled nanostructure functionalization. Thus, while quantitation of analytes in the presence of variable backgrounds is challenging for most sensor arrays, we achieve this goal using individual multivariable sensors. These colorimetric sensors can be tuned for numerous vapour sensing scenarios in confined areas or as individual nodes for distributed monitoring.
C1 [Potyrailo, Radislav A.; Tang, Zhexiong; Palacios, Manuel A.; Larsen, Michael; Le Tarte, Laurie A.; Grande, James C.; Zhong, Sheng; Deng, Tao] Gen Elect Global Res Ctr, Niskayuna, NY 12309 USA.
[Bonam, Ravi K.; Hartley, John G.] SUNY Albany, Coll Nanoscale Sci & Engn, Albany, NY 12203 USA.
[Starkey, Timothy A.; Vukusic, Peter] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England.
[Vasudev, Milana; Bunning, Timothy; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Vasudev, Milana] Univ Massachusetts, Dept Bioengn, Dartmouth, MA 02747 USA.
[Deng, Tao] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.
RP Potyrailo, RA (reprint author), Gen Elect Global Res Ctr, Niskayuna, NY 12309 USA.
EM Potyrailo@ge.com
FU DARPA 'Bio Inspired Photonics' [W911NF-10-C-0069]; General Electric's
Advanced Technology research funds
FX We would like to acknowledge H. Ghiradella (University at Albany), M.
Blohm and S. Duclos (GE) and V. Greanya, J. Abo-Shaeer, C. Nehl and M.
Sandrock (DARPA) for fruitful discussions. This work has been supported
in part from DARPA contract W911NF-10-C-0069 'Bio Inspired Photonics'
and from General Electric's Advanced Technology research funds. The
content of the information does not necessarily reflect the position or
the policy of the US Government.
NR 62
TC 21
Z9 21
U1 29
U2 86
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2015
VL 6
AR 7959
DI 10.1038/ncomms8959
PG 12
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CT5MP
UT WOS:000362854800001
PM 26324320
ER
PT J
AU Mirau, P
Farmer, BL
Pandey, RB
AF Mirau, Peter
Farmer, B. L.
Pandey, R. B.
TI Structural variation of alpha-synuclein with temperature by a
coarse-grained approach with knowledge-based interactions
SO AIP ADVANCES
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; N-TERMINAL ACETYLATION; MONTE-CARLO;
COMPUTER-SIMULATION; FORCE-FIELD; A-SYNUCLEIN; WILD-TYPE; PROTEIN;
POTENTIALS; PEPTIDE
AB Despite enormous efforts, our understanding the structure and dynamics of alpha-synuclein (ASN), a disordered protein (that plays a key role in neurodegenerative disease) is far from complete. In order to better understand sequence-structure-property relationships in alpha-SYNUCLEIN we have developed a coarse-grained model using knowledge-based residue-residue interactions and used it to study the structure of free ASN as a function of temperature (T) with a large-scale Monte Carlo simulation. Snapshots of the simulation and contour contact maps show changes in structure formation due to self-assembly as a function of temperature. Variations in the residue mobility profiles reveal clear distinction among three segments along the protein sequence. The N-terminal (1-60) and C-terminal (96-140) regions contain the least mobile residues, which are separated by the higher mobility non-amyloid component (NAC) (61-95). Our analysis of the intra-protein contact profile shows a higher frequency of residue aggregation (clumping) in the N-terminal region relative to that in the C-terminal region, with little or no aggregation in the NAC region. The radius of gyration (R-g) of ASN decays monotonically with decreasing the temperature, consistent with the finding of Allison et al. (JACS, 2009). Our analysis of the structure function provides an insight into the mass (N) distribution of ASN, and the dimensionality (D) of the structure as a function of temperature. We find that the globular structure with D approximate to 3 at low T, a random coil, D approximate to 2 at high T and in between (2 <= D <= 3) at the intermediate temperatures. The magnitudes of D are in agreement with experimental estimates (J. Biological Chem 2002). (C) 2015 Author(s).
C1 [Mirau, Peter; Farmer, B. L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Pandey, R. B.] Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
RP Mirau, P (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
FU Air Force Research Laboratory
FX This work is supported by the Air Force Research Laboratory. We thank
Diana Lovejoy for reading the manuscript and corrections.
NR 60
TC 1
Z9 1
U1 1
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD SEP
PY 2015
VL 5
IS 9
AR 092504
DI 10.1063/1.4927544
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CT1MI
UT WOS:000362562100007
ER
PT J
AU Mitchel, WC
Elhamri, S
Haugan, HJ
Berney, R
Mou, S
Brown, GJ
AF Mitchel, W. C.
Elhamri, S.
Haugan, H. J.
Berney, R.
Mou, Shin
Brown, G. J.
TI Electrical properties of n-type GaSb substrates and p-type GaSb buffer
layers for InAs/InGaSb superlattice infrared detectors
SO AIP ADVANCES
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; MIDINFRARED DETECTORS; II SUPERLATTICES;
PHOTOLUMINESCENCE; PARAMETERS; HALL; BAND
AB Lightly doped n-type GaSb substrates with p-type GaSb buffer layers are the preferred templates for growth of InAs/InGaSb superlattices used in infrared detector applications because of relatively high infrared transmission and a close lattice match to the superlattices. We report here temperature dependent resistivity and Hall effect measurements of bare substrates and substrate-p-type buffer layer structures grown by molecular beam epitaxy. Multicarrier analysis of the resistivity and Hall coefficient data demonstrate that high temperature transport in the substrates is due to conduction in both the high mobility zone center G band and the low mobility off-center L band. High overall mobility values indicate the absence of close compensation and that improved infrared and transport properties were achieved by a reduction in intrinsic acceptor concentration. Standard transport measurements of the undoped buffer layers show p-type conduction up to 300 K indicating electrical isolation of the buffer layer from the lightly n-type GaSb substrate. However, the highest temperature data indicate the early stages of the expected p to n type conversion which leads to apparent anomalously high carrier concentrations and lower than expected mobilities. Data at 77 K indicate very high quality buffer layers. (C) 2015 Author(s).
C1 [Mitchel, W. C.; Haugan, H. J.; Mou, Shin; Brown, G. J.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Elhamri, S.; Berney, R.] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
RP Mitchel, WC (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM William.Mitchel.1@us.af.mil
FU Air Force [FA8650-07-D-5800]
FX We would like to thank S. Bowers and G. Landis for providing technical
assistance with the MBE system and sample fabrication. The Air Force
supported this work through contract FA8650-07-D-5800 for H. H. and S.
E.
NR 21
TC 1
Z9 1
U1 2
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD SEP
PY 2015
VL 5
IS 9
AR 097219
DI 10.1063/1.4932208
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CT1MI
UT WOS:000362562100107
ER
PT J
AU Pandey, RB
Farmer, BL
Gerstman, BS
AF Pandey, R. B.
Farmer, B. L.
Gerstman, Bernard S.
TI Self-assembly dynamics for the transition of a globular aggregate to a
fibril network of lysozyme proteins via a coarse-grained Monte Carlo
simulation
SO AIP ADVANCES
LA English
DT Article
ID POTENTIALS; INSTABILITY; PACKING
AB The self-organizing dynamics of lysozymes (an amyloid protein with 148 residues) with different numbers of protein chains, Nc = 1,5,10, and 15 (concentration 0.004 - 0.063) is studied by a coarse-grained Monte Carlo simulation with knowledge-based residue-residue interactions. The dynamics of an isolated lysozyme (Nc = 1) is ultra-slow (quasi-static) at low temperatures and becomes diffusive asymptotically on raising the temperature. In contrast, the presence of interacting proteins leads to concentration induced protein diffusion at low temperatures and concentration-tempering sub-diffusion at high temperatures. Variation of the radius of gyration of the protein with temperature shows a systematic transition from a globular structure (at low T) to a random coil (high T) conformation when the proteins are isolated. The crossover from globular to random coil becomes sharper upon increasing the protein concentration (i.e. with Nc = 5,10), with larger R-g at higher temperatures and concentration; R-g becomes smaller on adding more protein chains (e.g. Nc = 15) a non-monotonic response to protein concentration. Analysis of the structure factor (S(q)) provides an estimate of the effective dimension (D >= 3, globular conformation at low temperature, and D similar to 1.7, random coil, at high temperatures) of the isolated protein. With many interacting proteins, the morphology of the self-assembly varies with scale, i.e. at the low temperature (T = 0.015), D similar to 2.9 on the scale comparable to the radius of gyration of the protein, and D similar to 2.3 at the large scale over the entire sample. The global network of fibrils appears at high temperature (T = 0.021) with D similar to 1.7 (i.e. a random coil morphology at large scale) involving tenuous distribution of micro-globules (at small scales). (C) 2015 Author(s).
C1 [Pandey, R. B.] Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
[Farmer, B. L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Farmer, B. L.] N Carolina State Univ, Mat Sci & Engn, Raleigh, NC 27606 USA.
[Gerstman, Bernard S.] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
RP Pandey, RB (reprint author), Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
FU Air Force Research Laboratory
FX This work is supported by the Air Force Research Laboratory.
NR 24
TC 2
Z9 2
U1 0
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD SEP
PY 2015
VL 5
IS 9
AR 092502
DI 10.1063/1.4921074
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CT1MI
UT WOS:000362562100005
ER
PT J
AU Yukon, SP
Malomed, BA
AF Yukon, Stanford P.
Malomed, Boris A.
TI Fluxons in a triangular set of coupled long Josephson junctions
SO JOURNAL OF MATHEMATICAL PHYSICS
LA English
DT Article
ID SINE-GORDON EQUATION; FRENKEL-KONTOROVA MODEL; CHERENKOV RADIATION;
BUNCHED FLUXONS; DYNAMICS; SOLITONS; OSCILLATORS; STABILITY; VORTICES;
SYSTEM
AB We report results of an analysis of the dynamics of magnetic flux solitons in the system of three long Josephson junctions between three bulk superconductors that form a prism. The system is modeled by coupled sine-Gordon equations for the phases of the junctions. The Aharonov-Bohm constraint takes into account the axial magnetic flux enclosed by the prism and reduces the system from three independent phases to two. The equations of motion for the phases include dissipative terms, and a control parameter delta which accounts for the deviation of the enclosed flux from half a quantum. Analyzing the effective potential of the coupled equations, we identify different species of topological and non-topological phase solitons (fluxons) in this system. In particular, subkinks with fractional topological charges +/-1/3 and +/-2/3, confined inside integer-charge fluxons, may be mapped onto the root diagrams for mesons and baryons in the original quark model of hadrons. Solutions for straight-line kinks and for two types of non-topological solitons are obtained in an explicit analytical form. Numerical tests demonstrate that the former species is unstable against breakup into pairs of separating single-fluxon kinks. The non-topological kinks feature metastability, eventually breaking up into fluxon-antifluxon pairs. Free fractional-fluxon kinks, that connect different potential minima and are, accordingly, pulled by the potential difference, are also considered. Using the momentum-balance method, we predict the velocity at which these kinks should move in the presence of the dissipation. Numerical tests demonstrate that the analysis predicts the velocity quite closely. Higher-energy static solutions for all of the stable kink types mentioned above, as well as kinks connecting false vacua, are found by means of the shooting method. Inelastic collisions among the stable fractional and single-fluxon kinks are investigated numerically. (C) 2015 AIP Publishing LLC.
C1 [Yukon, Stanford P.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Malomed, Boris A.] Tel Aviv Univ, Sch Elect Engn, Dept Phys Elect, Fac Engn, IL-69978 Tel Aviv, Israel.
RP Yukon, SP (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM yukon@alum.mit.edu
FU AFOSR; EOARD (US Air Force)
FX We would like to thank Professor Jianke Yang for helpful discussions and
for providing the initial studies on kink collision dynamics. The work
was carried out with partial support from AFOSR and EOARD (US Air
Force).
NR 58
TC 2
Z9 2
U1 2
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0022-2488
EI 1089-7658
J9 J MATH PHYS
JI J. Math. Phys.
PD SEP
PY 2015
VL 56
IS 9
AR 091509
DI 10.1063/1.4928927
PG 26
WC Physics, Mathematical
SC Physics
GA CT1OT
UT WOS:000362569200009
ER
PT J
AU Enloe, CL
Amatucci, WE
McHarg, MG
Balthazor, RL
AF Enloe, C. L.
Amatucci, W. E.
McHarg, M. G.
Balthazor, R. L.
TI Screens versus microarrays for ruggedized retarding potential analyzers
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID ION; TEMPERATURE; ERRORS
AB An array of highly miniaturized electrostatic lenses is shown to be a viable replacement for meshes or screens in a retarding potential analyzer (RPA) where mechanical ruggedness or the ability to intercept large currents of energetic particles is desirable. Data from a prototype device are presented cross-calibrated with a traditional planar RPA indicating how the so-called microarray configuration avoids energy-dependent transparency (either reduced or enhanced) associated with meshes or screens while providing accurate energy analysis with reasonable energy resolution. In contrast, another ruggedized configuration employing a screen is presented, showing the severity of energy-dependent enhanced transparency, verified by numerical simulation.
C1 [Enloe, C. L.; McHarg, M. G.; Balthazor, R. L.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Amatucci, W. E.] US Naval Res Lab, Washington, DC 20375 USA.
RP Enloe, CL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
OI Balthazor, Richard/0000-0002-4568-7446
NR 12
TC 1
Z9 1
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2015
VL 86
IS 9
AR 093302
DI 10.1063/1.4929532
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CT1PX
UT WOS:000362573300014
PM 26429435
ER
PT J
AU Shade, PA
Blank, B
Schuren, JC
Turner, TJ
Kenesei, P
Goetze, K
Suter, RM
Bernier, JV
Li, SF
Lind, J
Lienert, U
Almer, J
AF Shade, Paul A.
Blank, Basil
Schuren, Jay C.
Turner, Todd J.
Kenesei, Peter
Goetze, Kurt
Suter, Robert M.
Bernier, Joel V.
Li, Shiu Fai
Lind, Jonathan
Lienert, Ulrich
Almer, Jonathan
TI A rotational and axial motion system load frame insert for in situ high
energy x-ray studies
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID CRYSTAL PLASTICITY; DIFFRACTION MICROSCOPY; TOMOGRAPHIC MICROSCOPY;
POLYCRYSTALLINE COPPER; STRUCTURAL-MATERIALS; SINGLE-GRAIN; 3
DIMENSIONS; DEFORMATION; ORIENTATION; SIMULATIONS
AB High energy x-ray characterization methods hold great potential for gaining insight into the behavior of materials and providing comparison datasets for the validation and development of mesoscale modeling tools. A suite of techniques have been developed by the x-ray community for characterizing the 3D structure and micromechanical state of polycrystalline materials; however, combining these techniques with in situ mechanical testing under well characterized and controlled boundary conditions has been challenging due to experimental design requirements, which demand new high-precision hardware as well as access to high-energy x-ray beamlines. We describe the design and performance of a load frame insert with a rotational and axial motion system that has been developed to meet these requirements. An example dataset from a deforming titanium alloy demonstrates the new capability. (C) 2015 AIP Publishing LLC.
C1 [Shade, Paul A.; Schuren, Jay C.; Turner, Todd J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Blank, Basil] PulseRay, Beaver Dams, NY 14812 USA.
[Kenesei, Peter; Goetze, Kurt; Lienert, Ulrich; Almer, Jonathan] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Suter, Robert M.; Lind, Jonathan] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Bernier, Joel V.; Li, Shiu Fai; Lind, Jonathan] Lawrence Livermore Natl Lab, Engn Directorate, Livermore, CA 94550 USA.
RP Shade, PA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM paul.shade.1@us.af.mil
RI Shade, Paul/H-6459-2011; Suter, Robert/P-2541-2014
OI Suter, Robert/0000-0002-0651-0437
FU Materials & Manufacturing Directorate of the U.S. Air Force Research
Laboratory; U.S. DOE [DEAC02-06CH11357]
FX The authors would like to thank Dr. Adam Pilchak (Air Force Research
Laboratory) for providing the Ti-7Al material examined in this study,
Dr. Chris Woodward (Air Force Research Laboratory) for help securing the
computational resources required for the data reduction, Ali Mashayekhi
(Advanced Photon Source) and Erika Benda (Advanced Photon Source) for
help with the experimental setup, and Dr. Dennis Dimiduk (Air Force
Research laboratory) and Professor Matthew Miller (Cornell University)
for useful discussions. The authors acknowledge support from the
Materials & Manufacturing Directorate of the U.S. Air Force Research
Laboratory. Use of the Advanced Photon Source, an Office of Science User
Facility operated for the U.S. Department of Energy (DOE) Office of
Science by Argonne National Laboratory was supported by the U.S. DOE
under Contract No. DEAC02-06CH11357.
NR 53
TC 7
Z9 7
U1 3
U2 23
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2015
VL 86
IS 9
AR 093902
DI 10.1063/1.4927855
PG 8
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CT1PX
UT WOS:000362573300031
PM 26429452
ER
PT J
AU Adams, SF
Wu, Y
Zhang, ZL
AF Adams, Steven F.
Wu, Yue
Zhang, Zhili
TI Oxygen Rotational Temperature Determination Using Empirical Analyses of
C-3 Pi(v '=2) <- X-3 Sigma(v ''=0) Transitions
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Temperature; Spectrum analysis; Multiphoton; Ionization;
resonance-enhanced multiphoton ionization; REMPI
ID ENHANCED MULTIPHOTON IONIZATION; MICROWAVE-SCATTERING; SPECTROSCOPY;
PRESSURE; MOLECULES; FLOWS; REMPI; FLAME; CARS; AIR
AB The spectra of molecular oxygen through C-3 Pi(v' =2)<- X-3 Sigma(v"= 0) transitions have been obtained by coherent microwave Rayleigh scattering (radar) from resonance-enhanced multiphoton ionization (REMPI). Measurements of rotational temperatures of molecular oxygen have been demonstrated based on the empirical analyses of the O-2 spectra without the requirement of highly resolved rotational features. Three methods, including (1) linewidth fitting, (2) linear fitting, and (3) area fitting have been investigated for temperature measurements within pure oxygen, ambient air, and H-2-air and CH4-air flame environments. The first two methods were applied in a moderately low temperature environment with measurement uncertainties less than 11% and 26%, respectively. The area fitting method covered a wider temperature range, from room temperature (similar to 300 K) to flame temperature (similar to 1700 K), with minimal dependence on the fine structures of the O-2 spectra. Less elaborate than Boltzmann plot analyses of ultrafine rotational lines from congested upper rotational energy levels in O-2(C-3 Pi(v' = 2)), these empirical analyses are predictably sensitive to the thermal distribution of molecular oxygen and have been successfully demonstrated as simple and quick methods for remote gas-phase temperature measurement.
C1 [Adams, Steven F.] Wright Patterson AFB, Air Force Res Lab AFRL RQQE, Wright Patterson AFB, OH 45433 USA.
[Wu, Yue; Zhang, Zhili] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
RP Zhang, ZL (reprint author), Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
EM zzhang24@utk.edu
FU NSF [CBET-1032523]; Air Force Office of Scientific Research; Air Force
Research Laboratory
FX This work is being supported by NSF CBET-1032523, Air Force Office of
Scientific Research and Air Force Research Laboratory.
NR 19
TC 2
Z9 2
U1 5
U2 10
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
EI 1943-3530
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD SEP
PY 2015
VL 69
IS 9
BP 1036
EP 1041
DI 10.1366/14-07772
PG 6
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA CS2VE
UT WOS:000361929300005
PM 26414523
ER
PT J
AU Perry, LD
AF Perry, Lori Davis
TI Elizabeth Rowe and the Development of the English Novel
SO EIGHTEENTH-CENTURY FICTION
LA English
DT Book Review
C1 [Perry, Lori Davis] US Air Force Acad, Dept English & Fine Arts, Colorado Springs, CO 80840 USA.
RP Perry, LD (reprint author), US Air Force Acad, Dept English & Fine Arts, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV TORONTO PRESS INC
PI TORONTO
PA JOURNALS DIVISION, 5201 DUFFERIN ST, DOWNSVIEW, TORONTO, ON M3H 5T8,
CANADA
SN 0840-6286
EI 1911-0243
J9 EIGHTEENTH-CENTURY F
JI Eighteenth-Century Fict.
PD FAL
PY 2015
VL 28
IS 1
BP 192
EP 194
DI 10.3138/ecf.2015.28.1.192
PG 3
WC Literature
SC Literature
GA CS4JP
UT WOS:000362042400015
ER
PT J
AU Ghrist, ML
Fornberg, B
Reeger, JA
AF Ghrist, Michelle L.
Fornberg, Bengt
Reeger, Jonah A.
TI Stability ordinates of Adams predictor-corrector methods
SO BIT NUMERICAL MATHEMATICS
LA English
DT Article
DE Adams methods; Predictor-corrector; Imaginary stability boundary; Linear
multistep methods; Finite difference methods; Stability region;
Stability ordinate
AB How far the stability domain of a numerical method for approximating solutions to differential equations extends along the imaginary axis indicates how useful the method is for approximating solutions to wave equations; this maximum extent is termed the imaginary stability boundary, also known as the stability ordinate. It has previously been shown that exactly half of Adams-Bashforth (AB), Adams-Moulton (AM), and staggered Adams-Bashforth methods have nonzero stability ordinates. In this paper, we consider two categories of Adams predictor-corrector methods and prove that they follow a similar pattern. In particular, if is the order of the method, AB-AM methods have nonzero stability ordinate only for , and AB(1)-AM methods have nonzero stability ordinates only for p = 1, 2, 5, 6, 9, 10, ... , and AB(p-1)-AMp methods have nonzero stability ordinates only for p = 3, 4, 7, 8, 11, 12, ... .
C1 [Ghrist, Michelle L.] US Air Force Acad, Dept Math Sci, Colorado Springs, CO 80840 USA.
[Fornberg, Bengt] Univ Colorado, Dept Appl Math, Boulder, CO 80309 USA.
[Reeger, Jonah A.] Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
RP Ghrist, ML (reprint author), US Air Force Acad, Dept Math Sci, 2354 Fairchild,Suite 6D2, Colorado Springs, CO 80840 USA.
EM michelle.ghrist@usafa.edu; fornberg@colorado.edu; jonah.reeger@afit.edu
FU United States Air Force; NSF [DMS-0914647]
FX Support for M. Ghrist and J. Reeger provided by the United States Air
Force. Support for B. Fornberg provided by NSF DMS-0914647.
NR 10
TC 0
Z9 0
U1 1
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0006-3835
EI 1572-9125
J9 BIT
JI Bit
PD SEP
PY 2015
VL 55
IS 3
BP 733
EP 750
DI 10.1007/s10543-014-0528-7
PG 18
WC Computer Science, Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA CS1IS
UT WOS:000361818100006
ER
PT J
AU Ware, TH
Perry, ZP
Middleton, CM
Iacono, ST
White, TJ
AF Ware, Taylor H.
Perry, Zachary P.
Middleton, Claire M.
Iacono, Scott T.
White, Timothy J.
TI Programmable Liquid Crystal Elastomers Prepared by Thiol-Ene
Photopolymerization
SO ACS MACRO LETTERS
LA English
DT Article
ID CLICK CHEMISTRY; SHAPE-MEMORY; ACTUATION; ACRYLATE
AB The spontaneous conversion of a flat film into a 3-D shape requires local programming of the mechanical response. Historically, the ability to locally program the mechanical response of high strain (>30%) liquid crystalline elastomers (LCEs) has been limited to magnetic or mechanical alignment techniques, which limits spatial resolution. Recently, we reported on the preparation of LCEs capable of 55% strain with spatial control of the mechanical response at scales as small as 0.01 mm(2). Here, we report a distinct formulation strategy to realize programmable stimulus-response in LCEs. Photopolymerization of thiol-ene/acrylate formulations yields materials that exhibit large reversible strain up to 150%. The photopolymerization reaction is extremely rapid, reducing preparation time from days to minutes. The mechanical behavior of these materials can be tuned by varying cross-link density. Spatial and hierarchical programming of the director profile is demonstrated, enabling 3-D shape change, including twisting ribbons and localized Gaussian curvature.
C1 [Ware, Taylor H.; Perry, Zachary P.; Middleton, Claire M.; White, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Ware, Taylor H.; Middleton, Claire M.] Azimuth Corp, Beavercreek, OH 45431 USA.
[Perry, Zachary P.; Iacono, Scott T.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
[Perry, Zachary P.; Iacono, Scott T.] US Air Force Acad, Chem Res Ctr, Colorado Springs, CO 80840 USA.
RP White, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.white.24@us.af.mil
OI Ware, Taylor/0000-0001-7996-7393
FU Materials and Manufacturing Directorate and the Office of Scientific
Research of the Air Force Research Laboratory
FX T.H.W., C.M.M., and T.J.W. would like to acknowledge funding from the
Materials and Manufacturing Directorate and the Office of Scientific
Research of the Air Force Research Laboratory.
NR 23
TC 11
Z9 11
U1 15
U2 56
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2161-1653
J9 ACS MACRO LETT
JI ACS Macro Lett.
PD SEP
PY 2015
VL 4
IS 9
BP 942
EP 946
DI 10.1021/acsmacrolett.5b00511
PG 5
WC Polymer Science
SC Polymer Science
GA CR5ZX
UT WOS:000361424000016
ER
PT J
AU Travis, WJ
Heyman, RE
Slep, AMS
AF Travis, Wendy J.
Heyman, Richard E.
Slep, Amy M. Smith
TI Fighting the battle on the home front: Prevention and intervention of
child maltreatment for the military family
SO CHILD ABUSE & NEGLECT
LA English
DT Article
DE child maltreatment; military; Air Force; active duty; prevention;
intervention
ID DIAGNOSTIC-CRITERIA; RELIABILITY; PARENTS
C1 [Travis, Wendy J.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Heyman, Richard E.; Slep, Amy M. Smith] NYU, New York, NY 10003 USA.
RP Travis, WJ (reprint author), US Air Force Acad, 2354 Fairchild Dr,Suite 6L-145, Colorado Springs, CO 80840 USA.
EM wendy.travis@usafa.edu
NR 7
TC 1
Z9 1
U1 2
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0145-2134
EI 1873-7757
J9 CHILD ABUSE NEGLECT
JI Child Abuse Negl.
PD SEP
PY 2015
VL 47
BP 114
EP 123
DI 10.1016/j.chiabu.2015.05.015
PG 10
WC Family Studies; Psychology, Social; Social Work
SC Family Studies; Psychology; Social Work
GA CR5WO
UT WOS:000361415300011
PM 26051785
ER
PT J
AU Barton, DA
Beecken, BP
Hoglund, RM
AF Barton, David A.
Beecken, Brian P.
Hoglund, Robert M.
TI Determination of Energy and Charge Deposition Profiles in Elemental
Slabs From an Isotropically Equivalent Electron Source Using Monte Carlo
Simulations
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article; Proceedings Paper
CT 13th Spacecraft Charging Technology Conference
CY JUN 23-27, 2014
CL Pasadena, CA
DE Charge deposition; energy deposition; isotropic electron incidence;
Monte Carlo simulations
ID OBLIQUE-INCIDENCE; ALGORITHM; BACKSCATTERING; COEFFICIENT; ABSORBERS
AB Monte Carlo simulations using the MCNP5 transport code have been made for electrons with 10.0 keV to 5.0 MeV kinetic energies incident on thick slabs of elemental materials with atomic numbers in the range 6-79. An electron point source near the surface of the target slab was used to simulate isotropic incidence, allowing for the inclusion of backscatter and secondary-electron emissions in the simulation. Thus, the results should be uniquely useful for the modeling of deep-dielectric charging in spacecraft over a large range of energies and materials. Due to the minimum electron energy cutoff of MCNP5, accuracy of the simulations decreases at the lowest incident energies. A path has been identified for developing an algorithm that can quickly reproduce and interpolate between the Monte Carlo results for both incident energies and target materials in the ranges studied. Such an algorithm should prove useful to modelers of deep-dielectric charging in realistic spacecraft environments.
C1 [Barton, David A.] Air Force Res Lab, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
[Beecken, Brian P.; Hoglund, Robert M.] Bethel Univ, Dept Phys, St Paul, MN 55112 USA.
RP Barton, DA (reprint author), Air Force Res Lab, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
EM david.barton.14@us.af.mil; beebri@bethel.edu; robbie_hoglund@baylor.edu
FU Air Force Research Laboratory
FX This work was supported by the Air Force Research Laboratory.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD SEP
PY 2015
VL 43
IS 9
SI SI
BP 2861
EP 2868
DI 10.1109/TPS.2015.2461543
PN 1
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA CR3FE
UT WOS:000361215200013
ER
PT J
AU Hoffmann, R
Ferguson, D
Patton, J
Wheelock, AT
Young, JA
Crofton, MW
Prebola, JL
Crider, DH
Likar, JJ
Schneider, TA
Vaughn, JA
Bodeau, JM
Noushkam, N
Vayner, BV
Hoang, B
AF Hoffmann, Ryan
Ferguson, Dale
Patton, James
Wheelock, Adrian T.
Young, Jason A.
Crofton, Mark W.
Prebola, John L.
Crider, Dustin H.
Likar, Justin J.
Schneider, Todd A.
Vaughn, Jason A.
Bodeau, J. Michale
Noushkam, Nikki
Vayner, Boris V.
Hoang, Bao
TI AFRL Round-Robin Test Results on Plasma Propagation Velocity
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article; Proceedings Paper
CT 13th Spacecraft Charging Technology Conference
CY JUN 23-27, 2014
CL Pasadena, CA
DE Dielectric; discharge; flashover; spacecraft charging
ID SOLAR-ARRAY; FLASHOVER; EXPANSION
AB The speed plasma propagates across a charged solar panel after a primary arc is one of the most important, yet poorly known, quantities in determining Electrostatic Discharge (ESD) currents for spacecraft arcing events. A review of the literature over the last two decades reveals that measured propagation velocity varies by as much as an order of magnitude. To overcome this deficiency, a round-robin set of tests was initiated with partners from industry, academia, NASA and the U.S. Air Force. This paper will provide the most recent results from the Air Force Research Laboratory testing conducted at the Spacecraft Charging and Instrument Calibration Laboratory.
C1 [Hoffmann, Ryan; Ferguson, Dale; Patton, James; Wheelock, Adrian T.] Air Force Res Lab, Spacecraft Charging & Instrument Calibrat Lab, Kirtland AFB, NM 87117 USA.
[Young, Jason A.; Crofton, Mark W.] Aerosp Corp, Los Angeles, CA 90009 USA.
[Prebola, John L.; Crider, Dustin H.] Aerosp Testing Alliance, Arnold Afb, TN 37389 USA.
[Likar, Justin J.] UTC Aerosp Syst, Charlotte, NC 28217 USA.
[Schneider, Todd A.; Vaughn, Jason A.] NASA, Marshal Space Flight Ctr, Huntsville, AL 35812 USA.
[Bodeau, J. Michale] Northrop Grumman, Mclean, VA 22102 USA.
[Noushkam, Nikki] Orbital Sci, Chandler, AZ 85248 USA.
[Vayner, Boris V.] Ohio Aerosp Inst, Cleveland, OH 44142 USA.
[Hoang, Bao] Space Syst Loral, Palo Alto, CA 94303 USA.
RP Hoffmann, R (reprint author), Air Force Res Lab, Spacecraft Charging & Instrument Calibrat Lab, Kirtland AFB, NM 87117 USA.
EM ryan.hoffmann@us.af.mil; dale.ferguson@us.af.mil; james.patton@us.af.mil
FU Air Force Research Laboratory
FX This work was supported by the Air Force Research Laboratory.
(Corresponding author: Ryan Hoffmann.)
NR 21
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD SEP
PY 2015
VL 43
IS 9
SI SI
BP 3006
EP 3013
DI 10.1109/TPS.2015.2465865
PN 1
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA CR3FE
UT WOS:000361215200031
ER
PT J
AU Ferguson, DC
Katz, I
AF Ferguson, Dale C.
Katz, Ira
TI The Worst Case GEO Environment and the Frequency of Arcs in GEO
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article; Proceedings Paper
CT 13th Spacecraft Charging Technology Conference
CY JUN 23-27, 2014
CL Pasadena, CA
DE GEO; plasmas; spacecraft charging; worst cases
AB Proper spacecraft design and testing depend on a knowledge of the worst case environment and the number of arcs to be endured during the spacecraft lifetime. In this paper, we define the criteria to be used to specify the worst case geosynchronous earth orbit (GEO) charging environment (plasma density and temperature), including the physical constraints on particle and magnetic field energy densities and the relative importance of frame charging and differential charging. A previous estimate of the frequency of arcing (found in the literature and incorporated into an International Standards Organization standard) and the consequent total number of arcs to be encountered in a GEO satellite lifetime are found to be incorrect because they were based on environmental measurements using a faulty algorithm to determine spacecraft charging and plasma density. Using more accurate estimates of the frequency of GEO plasma densities and temperatures, we arrive at a much lower estimate of the total number of arcs during a GEO satellite lifetime. Finally, the worst case GEO charging environment seen to date is determined from Nascap-2k simulations. Our estimates of worst case charging environments and arc frequencies may be more confidently used by GEO spacecraft designers and test engineers.
C1 [Ferguson, Dale C.] Air Force Res Lab, Albuquerque, NM 87117 USA.
[Katz, Ira] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Ferguson, DC (reprint author), Air Force Res Lab, Albuquerque, NM 87117 USA.
EM dale.ferguson@kirtland.af.mil; ira.katz@jpl.nasa.gov
NR 17
TC 0
Z9 0
U1 1
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD SEP
PY 2015
VL 43
IS 9
SI SI
BP 3021
EP 3026
DI 10.1109/TPS.2015.2432718
PN 1
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA CR3FE
UT WOS:000361215200033
ER
PT J
AU Ferguson, DC
Worden, SP
Hastings, DE
AF Ferguson, Dale C.
Worden, Simon Peter
Hastings, Daniel E.
TI The Space Weather Threat to Situational Awareness, Communications, and
Positioning Systems
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article; Proceedings Paper
CT 13th Spacecraft Charging Technology Conference
CY JUN 23-27, 2014
CL Pasadena, CA
DE Communications; positioning systems; situational awareness; space
weather
AB A recent space weather headline has cast doubt in the minds of some as to whether space weather is the source of spacecraft anomalies, and thus, whether it is important in the design and operation of critical situational awareness, communications, and positioning systems. In this paper, we reiterate the evidence for the importance of space weather, its role in producing spacecraft and ground anomalies, and the threat it poses to critical systems. In addition, we report new studies broken down by anomaly types and suggest the sources of the anomalies (surface charging or interior charging). Finally, we suggest spacecraft charging and ground effects mitigation strategies for design and operations of systems critical to our modern civilization.
C1 [Ferguson, Dale C.] US Air Force Res Lab, Kirtland Air Force Base, Space Vehicles Directorate, Albuquerque, NM 87116 USA.
[Worden, Simon Peter] US Air Force Space & Missile Syst Ctr, Los Angeles AFB, El Segundo, CA 90245 USA.
[Hastings, Daniel E.] US Air Force, Hanscom AFB, MA 01731 USA.
RP Ferguson, DC (reprint author), US Air Force Res Lab, Kirtland Air Force Base, Space Vehicles Directorate, Albuquerque, NM 87116 USA.
EM dale.ferguson@kirtland.af.mil; simon.p.worden@nasa.gov;
daniel.hastings@mit.edu
NR 23
TC 3
Z9 3
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD SEP
PY 2015
VL 43
IS 9
SI SI
BP 3086
EP 3098
DI 10.1109/TPS.2015.2412775
PN 1
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA CR3FE
UT WOS:000361215200041
ER
PT J
AU Musinski, WD
McDowell, DL
AF Musinski, William D.
McDowell, David L.
TI On the eigenstrain application of shot-peened residual stresses within a
crystal plasticity framework: Application to Ni-base superalloy
specimens
SO INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
LA English
DT Article
DE Crystal plasticity; Ni-base superalloys; IN100; Residual stresses;
Eigenstrain
ID FATIGUE-CRACK INITIATION; POLYCRYSTALLINE MICRO STRUCTURES; FOREIGN
OBJECT DAMAGE; AISI 4140 STEEL; INVERSE APPROACH; PEENING PROCESS;
ALUMINUM-ALLOY; CYCLE FATIGUE; AUTOMATED-ANALYSIS; PART 1
AB Shot-peening-induced compressive residual stresses are often introduced in Ni-base superalloy components to help prevent or retard surface fatigue crack initiation and early growth at near surface inclusions. In certain cases these compressive residual stresses can shift the fatigue crack initiation site from surface to sub-surface locations. However, the ability to computationally predict the improvement in fatigue life response and scatter due to induced compressive residual stresses are lightly treated in the literature. To address this issue, a method to incorporate shot-peened residual stresses within a 3D polycrystalline microstructure is introduced in this work. These residual stresses are induced by a distribution of fictitious or quasi-thermal expansion eigenstrain as a function of depth from the specimen surface. Two different material models are used, a 12 plasticity and a crystal plasticity model. First, the J(2) plasticity model with combined isotropic and kinematic hardening is used to determine the distribution of quasi-thermal expansion eigenstrain as a function of depth from the surface necessary to induce the target residual stress profile within the microstructure. This distribution of quasi-thermal expansion eigenstrain is then used within a crystal plasticity framework to model the effect of microstructure heterogeneity on the variability in residual stresses among multiple instantiations. This model is verified with experimental X-ray diffraction (XRD) data for scatter in residual stresses for both the initial microstructure and after a single load/unload cycle. Published by Elsevier Ltd.
C1 [Musinski, William D.] US Air Force, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Musinski, William D.; McDowell, David L.] Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[McDowell, David L.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RP Musinski, WD (reprint author), US Air Force, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM william.musinski.1@us.af.mil
FU Air Force Research Laboratory, United States [FA8650-09-2-5800];
Southwestern Ohio Council for Higher Education
FX WDM is thankful for funding from the Air Force Research Laboratory,
United States under contract FA8650-09-2-5800 with the Southwestern Ohio
Council for Higher Education. WDM would also like to acknowledge helpful
technical discussions with Dennis Buchanan, Reji John, and Andy
Rosenberger regarding this work. DLM is grateful for the support of the
Carter N. Paden, Jr. Distinguished Chair in Metals Processing.
NR 98
TC 2
Z9 2
U1 4
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0020-7403
EI 1879-2162
J9 INT J MECH SCI
JI Int. J. Mech. Sci.
PD SEP
PY 2015
VL 100
BP 195
EP 208
DI 10.1016/j.ijmecsci.2015.06.020
PG 14
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA CR3WQ
UT WOS:000361264200017
ER
PT J
AU Fager, H
Howe, BM
Greczynski, G
Jensen, J
Mei, AB
Lu, J
Hultman, L
Greene, JE
Petrov, I
AF Fager, Hanna
Howe, Brandon M.
Greczynski, Grzegorz
Jensen, Jens
Mei, A. B.
Lu, Jun
Hultman, Lars
Greene, J. E.
Petrov, Ivan
TI Novel hard, tough HfAlSiN multilayers, defined by alternating Si bond
structure, deposited using modulated high-flux, low-energy ion
irradiation of the growing film
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Article
ID MAGNETRON-SPUTTER-DEPOSITION; TRANSMISSION ELECTRON-MICROSCOPY;
INTERFACIAL REACTION PATHWAYS; X-RAY-DIFFRACTION; PHYSICAL-PROPERTIES;
MECHANICAL-PROPERTIES; TRANSPORT-PROPERTIES; ELASTIC-MODULUS;
THIN-FILMS; GROWTH
AB Hf1-x-yAlxSiyN (0 <= x <= 0.14, 0 <= y <= 0.12) single layer and multilayer films are grown on Si(001) at 250 degrees C using ultrahigh vacuum magnetically unbalanced reactive magnetron sputtering from a single Hf0.6Al0.2Si0.2 target in mixed 5%-N-2/Ar atmospheres at a total pressure of 20 mTorr (2.67 Pa). The composition and nanostructure of Hf1-x-yAlxSiyN films are controlled by varying the energy Ei of the ions incident at the film growth surface while maintaining the ion-to-metal flux ratio constant at eight. Switching E-i between 10 and 40 eV allows the growth of Hf0.78Al0.10Si0.12N/Hf0.78Al0.14Si0.08N multilayers with similar layer compositions, but in which the Si bonding state changes from predominantly Si-Si/Si-Hf for films grown with E-i = 10 eV, to primarily Si-N with E-i = 40 eV. Multilayer hardness values, which vary inversely with bilayer period Lambda, range from 20 GPa with Lambda = 20 nm to 27 GPa with Lambda = 2 nm, while fracture toughness increases directly with Lambda. Multilayers with Lambda = 10nm combine relatively high hardness, H similar to 24GPa, with good fracture toughness. (C) 2015 American Vacuum Society.
C1 [Fager, Hanna; Greczynski, Grzegorz; Jensen, Jens; Lu, Jun; Hultman, Lars; Greene, J. E.; Petrov, Ivan] Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys Div, SE-58183 Linkoping, Sweden.
[Howe, Brandon M.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Mei, A. B.; Greene, J. E.; Petrov, Ivan] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
[Mei, A. B.; Greene, J. E.; Petrov, Ivan] Univ Illinois, Dept Mat Sci, Urbana, IL 61801 USA.
RP Fager, H (reprint author), Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys Div, SE-58183 Linkoping, Sweden.
EM hanfa@ifm.liu.se
RI Lu, Jun/K-3321-2015
OI Lu, Jun/0000-0003-2754-6962
FU U.S. Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471];
Swedish Foundation for Strategic Research project Designed
Multicomponent Coatings, MultiFil; U.S. Department of Defense Science,
Mathematics, and Research for Transformation program; Swedish Government
Strategic Research Area Grant (SFO MAT-LiU) on Advanced Functional
Materials; Swedish Research Council (VR) [2009-00971]
FX This work was carried out in part in the Frederick Seitz Materials
Research Laboratory Central Facilities, Center for Microanalysis of
Materials, University of Illinois, which is partially supported by the
U.S. Department of Energy under Grant No. DE-FG02-07ER46453 and
DE-FG02-07ER46471. H.F. gratefully acknowledges the support of the
Swedish Foundation for Strategic Research project Designed
Multicomponent Coatings, MultiFil B.M.H. gratefully acknowledges the
support of the U.S. Department of Defense Science, Mathematics, and
Research for Transformation program. H.F., A.B.M., B.M.H., L.H., I.P.,
and J.E.G. also acknowledge support from Swedish Government Strategic
Research Area Grant (SFO MAT-LiU) on Advanced Functional Materials, and
the Swedish Research Council (VR), Grant No. 2009-00971.
NR 41
TC 1
Z9 1
U1 4
U2 12
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
EI 1520-8559
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD SEP
PY 2015
VL 33
IS 5
AR 05E103
DI 10.1116/1.4920980
PG 9
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA CR3JP
UT WOS:000361229000003
ER
PT J
AU Hussain, SM
Warheit, DB
Ng, SP
Comfort, KK
Grabinski, CM
Braydich-Stolle, LK
AF Hussain, Saber M.
Warheit, David B.
Ng, Sheung P.
Comfort, Kristen K.
Grabinski, Christin M.
Braydich-Stolle, Laura K.
TI At the Crossroads of Nanotoxicology in vitro: Past Achievements and
Current Challenges
SO TOXICOLOGICAL SCIENCES
LA English
DT Review
DE nanotoxicology; characterization; physicochemical parameters; safety
regulation; Dosimetry; in vitro models
ID IRON-OXIDE NANOPARTICLES; LOW-SOLUBILITY PARTICLES; AIRWAY
EPITHELIAL-CELLS; ENGINEERED NANOMATERIALS; SILVER NANOPARTICLES; CARBON
NANOTUBES; PHYSICOCHEMICAL PROPERTIES; SURFACE-CHEMISTRY; OXIDATIVE
STRESS; PROTEIN CORONA
AB The exponential growth in the employment of nanomaterials (NMs) has given rise to the field of nanotoxicology; which evaluates the safety of engineered NMs. Initial nanotoxicological studies were limited by a lack of both available materials and accurate biodispersion characterization tools. However, the years that followed were marked by the development of enhanced synthesis techniques and characterization technologies; which are now standard practice for nanotoxicological evaluation. Paralleling advances in characterization, significant progress was made in correlating specific physical parameters, such as size, morphology, or coating, to resultant physiological responses. Although great strides have been made to advance the field, nanotoxicology is currently at a crossroads and faces a number of obstacles and technical limitations not associated with traditional toxicology. Some of the most pressing and influential challenges include establishing full characterization requirements, standardization of dosimetry, evaluating kinetic rates of ionic dissolution, improving in vitro to in vivo predictive efficiencies, and establishing safety exposure limits. This Review will discuss both the progress and future directions of nanotoxicology: highlighting key previous research successes and exploring challenges plaguing the field today.
C1 [Hussain, Saber M.; Grabinski, Christin M.; Braydich-Stolle, Laura K.] Air Force Res Lab, Human Effectiveness Directorate, Mol Bioeffects Branch, Wright Patterson AFB, OH 45433 USA.
[Warheit, David B.; Ng, Sheung P.] DuPont Haskell Global Ctr Hlth & Environm Sci, Newark, DE 19714 USA.
[Comfort, Kristen K.] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH USA.
RP Hussain, SM (reprint author), Air Force Res Lab, Human Effectiveness Directorate, Mol Bioeffects Branch, Wright Patterson AFB, OH 45433 USA.
EM saber.hussain@us.af.mil
FU American Society for Engineering Education; Henry M. Jackson Foundation;
Oakridge Institute for Science Education
FX K. K. C. was funded in part from a Summer Faculty Fellowship sponsored
by the American Society for Engineering Education. L. K. B.-S. was
supported by the Henry M. Jackson Foundation and C. M. G. by the
Oakridge Institute for Science Education.
NR 120
TC 11
Z9 11
U1 7
U2 37
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1096-6080
EI 1096-0929
J9 TOXICOL SCI
JI Toxicol. Sci.
PD SEP
PY 2015
VL 147
IS 1
BP 5
EP 16
DI 10.1093/toxsci/kfv106
PG 12
WC Toxicology
SC Toxicology
GA CR4QQ
UT WOS:000361322000002
PM 26310852
ER
PT J
AU Claus, BJ
Nie, X
Martin, BE
Chen, W
AF Claus, B. J.
Nie, X.
Martin, B. E.
Chen, W.
TI A Side-Impact Torsion Kolsky Bar Development of Interfaces and a
Pulse-Shaping Technique
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE Torsion; Kolsky Bar; Split Hopkinson Pressure Bar; Pulse Shaping; Side
Impact; Friction
ID HOPKINSON-BAR; APPARATUS
AB A novel variant of the torsion Kolsky bar which utilizes a side-impact mechanism to achieve a more tractable torsional pulse-shaping technique has been developed. Integration of components from the well-established compression Kolsky bar experimental technique with the torsion Kolsky bar method allows conventional compression techniques to be applied to a torsion experiment. Typical considerations involving striker length, striker velocity, and pulse-shaper geometry, which are used to generate a desired waveform in a compression bar, can be directly applied to the side-impact torsion technique to control pulse length, rotational velocity, and waveform profile. The results from experiments show that the apparatus successfully generates torsional waveforms using conventional pulse shaping techniques.
C1 [Claus, B. J.; Chen, W.] Purdue Univ, W Lafayette, IN 47906 USA.
[Nie, X.] Univ N Texas, Denton, TX 76203 USA.
[Martin, B. E.] US Air Force Res Lab, Eglin AFB, FL 32542 USA.
RP Chen, W (reprint author), Purdue Univ, 701 W Stadium Ave, W Lafayette, IN 47906 USA.
EM benclaus@purdue.edu; Xu.Nie@unt.edu; bradley.martin.11@us.af.mil;
wchen@purdue.edu
FU Air Force Research Laboratory [FA8651-13-2-0005]; Purdue University
[FA8651-13-2-0005]
FX This research was supported by a cooperative agreement between Air Force
Research Laboratory and Purdue University (FA8651-13-2-0005).
NR 8
TC 0
Z9 0
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
EI 1741-2765
J9 EXP MECH
JI Exp. Mech.
PD SEP
PY 2015
VL 55
IS 7
BP 1367
EP 1374
DI 10.1007/s11340-015-0032-2
PG 8
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA CR2EK
UT WOS:000361138000014
ER
PT J
AU Greenlee, ET
Funke, GJ
Warm, JS
Finomore, VS
Patterson, RE
Barnes, LE
Funke, ME
Vidulich, MA
AF Greenlee, Eric T.
Funke, Gregory J.
Warm, Joel S.
Finomore, Victor S., Jr.
Patterson, Robert E.
Barnes, Laura E.
Funke, Matthew E.
Vidulich, Michael A.
TI Effects of Stereoscopic Depth on Vigilance Performance and Cerebral
Hemodynamics
SO HUMAN FACTORS
LA English
DT Article
DE vigilance; stereopsis; depth perception; neuroimaging; simulator
sickness; stress
ID SUSTAINED ATTENTION; STEREOPSIS; STRESS; DISPLAYS; DISPARITY; TASK;
DECREMENT; FRAMEWORK; WORKLOAD; SEARCH
AB Objective: We tested the possibility that monitoring a display wherein critical signals for detection were defined by a stereoscopic three-dimensional (3-D) image might be more resistant to the vigilance decrement, and to temporal declines in cerebral blood flow velocity (CBFV), than monitoring a display featuring a customary two-dimensional (2-D) image.
Background: Hancock has asserted that vigilance studies typically employ stimuli for detection that do not exemplify those that occur in the natural world. As a result, human performance is suboptimal. From this perspective, tasks that better approximate perception in natural environments should enhance performance efficiency. To test that possibility, we made use of stereopsis, an important means by which observers interact with their everyday surroundings.
Method: Observers monitored a circular display in which a vertical line was embedded. Critical signals for detection in a 2-D condition were instances in which the line was rotated clockwise from vertical. In a 3-D condition, critical signals were cases in which the line appeared to move outward toward the observer.
Results: The overall level of signal detection and the stability of detection over time were greater when observers monitored for 3-D changes in target depth compared to 2-D changes in target orientation. However, the 3-D display did not retard the temporal decline in CBFV.
Conclusion: These results provide the initial demonstration that 3-D displays can enhance performance in vigilance tasks.
Application: The use of 3-D displays may be productive in augmenting system reliability when operator vigilance is vital.
C1 [Greenlee, Eric T.] Univ Alabama, Tuscaloosa, AL USA.
[Funke, Gregory J.; Finomore, Victor S., Jr.; Patterson, Robert E.; Barnes, Laura E.; Vidulich, Michael A.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Warm, Joel S.] Univ Dayton, Res Inst, Human Factors Grp, Dayton, OH 45469 USA.
[Funke, Matthew E.] Naval Med Res Unit, Dayton, OH USA.
RP Funke, GJ (reprint author), Air Force Res Lab, 2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
EM Gregory.Funke.1@us.af.mil
NR 62
TC 2
Z9 2
U1 1
U2 6
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0018-7208
EI 1547-8181
J9 HUM FACTORS
JI Hum. Factors
PD SEP
PY 2015
VL 57
IS 6
BP 1063
EP 1075
DI 10.1177/0018720815572468
PG 13
WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology,
Applied; Psychology
SC Behavioral Sciences; Engineering; Psychology
GA CQ9AZ
UT WOS:000360904300011
PM 25850115
ER
PT J
AU Shelhamer, MC
Rowan, MP
Cancio, LC
Aden, JK
Rhie, RY
Merrill, GA
Wolf, SE
Renz, EM
Chung, KK
AF Shelhamer, Mehdi C.
Rowan, Matthew P.
Cancio, Leopoldo C.
Aden, James K.
Rhie, Ryan Y.
Merrill, Gerald A.
Wolf, Steven E.
Renz, Evan M.
Chung, Kevin K.
TI Recent trends in hospitalization and in-hospital mortality associated
with traumatic brain injury in Canada: A nationwide, population-based
study
SO JOURNAL OF TRAUMA AND ACUTE CARE SURGERY
LA English
DT Article
ID RESPIRATORY-DISTRESS-SYNDROME; FREQUENCY PERCUSSIVE VENTILATION;
INHALATION INJURY; PREDICTIVE-VALUE; TIDAL VOLUMES; BURN PATIENT;
PNEUMONIA; TIME; STRATEGIES; BIOMARKERS
C1 [Shelhamer, Mehdi C.] Univ Cincinnati, Med Ctr, US Air Force, Ctr Sustainment Trauma & Readiness Skills, Cincinnati, OH 45267 USA.
[Rowan, Matthew P.; Cancio, Leopoldo C.; Aden, James K.; Rhie, Ryan Y.; Merrill, Gerald A.; Renz, Evan M.; Chung, Kevin K.] US Army, Inst Surg Res, Jbsa Ft Sam Houston, TX USA.
[Cancio, Leopoldo C.; Chung, Kevin K.] Univ Texas Hlth Sci Ctr San Antonio, San Antonio, TX 78229 USA.
[Wolf, Steven E.] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA.
[Renz, Evan M.; Chung, Kevin K.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Rowan, MP (reprint author), 3698 Chambers Pass, San Antonio, TX 78234 USA.
EM matthew.p.rowan.vol@mail.mil
FU Percussionaire, Inc.
FX This research was supported in part by an appointment (M.P.R.) to the
Postgraduate Research Participation Program and an appointment (L.C.C.)
to the Knowledge Preservation Program at the US Army Institute of
Surgical Research administered by the Oak Ridge Institute for Science
and Education through an interagency agreement between the US Department
of Energy and USAMRMC. L.C.C. received funding for travel expenses from
Percussionaire, Inc., to speak at the Bird Institute, Sandpoint, Idaho,
in 2013. The authors have no other conflicts of interest to declare.
NR 36
TC 1
Z9 1
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 2163-0755
EI 2163-0763
J9 J TRAUMA ACUTE CARE
JI J. Trauma Acute Care Surg.
PD SEP
PY 2015
VL 79
IS 3
BP 431
EP 436
PG 6
WC Critical Care Medicine; Surgery
SC General & Internal Medicine; Surgery
GA CQ4JV
UT WOS:000360571900018
PM 26307877
ER
PT J
AU Merg, AD
Slocik, J
Blaber, MG
Schatz, GC
Naik, R
Rosi, NL
AF Merg, Andrea D.
Slocik, Joseph
Blaber, Martin G.
Schatz, George C.
Naik, Rajesh
Rosi, Nathaniel L.
TI Adjusting the Metrics of 1-D Helical Gold Nanoparticle Superstructures
Using Multivalent Peptide Conjugates
SO LANGMUIR
LA English
DT Article
ID PLASMONIC CIRCULAR-DICHROISM; QUARTZ-CRYSTAL MICROBALANCE; METAL
NANOPARTICLES; INORGANIC MATERIALS; OPTICAL-ACTIVITY; DNA ORIGAMI;
ASSEMBLIES; CHIRALITY; BINDING; NANOSTRUCTURES
AB The properties of nanoparticle superstructures depend on many factors, including the structural metrics of the nanoparticle superstructure (particle diameter, interparticle distances, etc.). Here, we introduce a family of gold-binding peptide conjugate molecules that can direct nanoparticle assembly, and we describe how these molecules can be systematically modified to adjust the structural metrics of linear double-helical nanoparticle superstructures. Twelve new peptide conjugates are prepared via linking a gold-binding peptide, AYSSGAPPMPPF (PEPAu), to a hydrophobic aliphatic tail. The peptide conjugates have 1, 2, or 3 PEPAu headgroups and a C-12, C-14, C-16, or C-18 aliphatic tail. The soft assembly of these peptide conjugates was studied using transmission electron microscopy (TEM), atomic force microscopy (AFM), and infrared (IR) spectroscopy. Several peptide conjugates assemble into 1-D twisted fibers having measurable structural parameters such as fiber width, thickness, and pitch that can be systematically varied by adjusting the aliphatic tail length and number of peptide headgroups. The linear soft assemblies serve as structural scaffolds for arranging gold nanoparticles into double-helical superstructures, which are examined via TEM. The pitch and intelparticle distances of the gold nanoparticle double helices correspond to the underlying metrics of the peptide conjugate soft assemblies, illustrating that designed peptide conjugate molecules can be used to not only direct the assembly of gold nanoparticles but also control the metrics of the assembled structure.
C1 [Merg, Andrea D.; Rosi, Nathaniel L.] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA.
[Slocik, Joseph; Naik, Rajesh] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Blaber, Martin G.; Schatz, George C.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
RP Rosi, NL (reprint author), Univ Pittsburgh, Dept Chem, 219 Parkman Ave, Pittsburgh, PA 15260 USA.
EM nrosi@pitt.edu
FU National Science Foundation [DMR-0954380]; Air Force Office of
Scientific Research [FA9550-11-1-0275]
FX We are grateful for financial support from the National Science
Foundation (DMR-0954380, N.L.R.) and the Air Force Office of Scientific
Research (FA9550-11-1-0275, N.L.R. and G.C.S.). R.RN. also acknowledges
support from the Air Force Office of Scientific Research.
NR 73
TC 2
Z9 2
U1 22
U2 68
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD SEP 1
PY 2015
VL 31
IS 34
BP 9492
EP 9501
DI 10.1021/acs.langmuir.5b02208
PG 10
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA CQ7HG
UT WOS:000360773000026
PM 26262910
ER
PT J
AU Cleary, JW
Nader, N
Leedy, KD
Soref, R
AF Cleary, Justin W.
Nader, Nima
Leedy, Kevin D.
Soref, Richard
TI Tunable short-to mid-infrared perfectly absorbing thin films utilizing
conductive zinc oxide on metal
SO OPTICAL MATERIALS EXPRESS
LA English
DT Article
ID ABSORPTION
AB A simple thin-film perfect absorber structure is shown that can achieve greater than 99.9% absorption and is tunable throughout the short-wave and mid-wave infrared. This is attained by use of the tunable mobility and carrier concentration, which in turn tunes the complex refractive indices, of a gallium-doped zinc oxide (GZO) thin film, and by choice of the GZO film thickness. The structure takes advantage of a metal substrate with large k, i.e. is opaque, with silver shown to be one suitable choice. The metal layer supporting GZO can be deposited on any practical substrate. An experimental deposited GZO film underwent subsequent etch steps and demonstrated 99% absorption at a wavelength of 2.1 mu m. Finally, designs are shown that enable near perfect absorption in the range of 1.5-4.7 mu m, with similar structures also likely possible extending beyond this wavelength range by further tailoring the GZO optical parameters and layer thickness. The presented structure, which is polarization insensitive at normal and near-normal incidence, has potential applications in reflection band filters, infrared scene generators, photodetectors and photovoltaics. (C) 2015 Optical Society of America
C1 [Cleary, Justin W.; Nader, Nima; Leedy, Kevin D.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Nader, Nima] Solid State Sci Corp, Nashua, NH 03060 USA.
[Soref, Richard] Univ Massachusetts, Dept Phys, Boston, MA 02125 USA.
RP Cleary, JW (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM Justin.Cleary.1@us.af.mil
FU Air Force Office of Scientific Research; AFOSR [9550-10-1-0417]
FX This work is supported by Air Force Office of Scientific Research. J.W.C
and N.N. acknowledges AFOSR LRIR No. 12RY10COR (Program Officer Dr.
Gernot Pomrenke), and R. S. acknowledges AFOSR Grant Number
9550-10-1-0417.
NR 17
TC 3
Z9 3
U1 7
U2 33
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2159-3930
J9 OPT MATER EXPRESS
JI Opt. Mater. Express
PD SEP 1
PY 2015
VL 5
IS 9
BP 1898
EP 1909
DI 10.1364/OME.5.001898
PG 12
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA CQ7UO
UT WOS:000360810500001
ER
PT J
AU Lukowski, M
Hessenius, C
Bedford, R
Fallahi, M
AF Lukowski, Michal
Hessenius, Chris
Bedford, Robert
Fallahi, Mahmoud
TI Tunable type II intracavity difference frequency generation at 5.4 mu m
in a two chip vertical external cavity surface emitting laser
SO OPTICS LETTERS
LA English
DT Article
AB We report on the generation and experimental demonstration of intracavity type II difference frequency generation in a two chip InGaAs/GaAs vertical external cavity surface emitting laser. The presented two chip cavity provides two orthogonally polarized, independently tunable, high-intensity lasing modes with emissions around 970 and 1170 nm. A silver thiogallate nonlinear crystal is inserted in the common collinear folded region of the cavity to generate output in the mid-IR spectral band. The independent tunability of each fundamental color allows for more than 100 nm of tuning around a 5.4 mu m difference frequency generated signal with a CW output power in excess of 5 mW. (C) 2015 Optical Society of America
C1 [Lukowski, Michal; Hessenius, Chris; Fallahi, Mahmoud] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
[Bedford, Robert] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Lukowski, M (reprint author), Univ Arizona, Coll Opt Sci, 1630 E Univ Blvd, Tucson, AZ 85721 USA.
EM mlukowski@optics.arizona.edu
FU National Science Foundation (NSF) [ECCS-1303476]
FX National Science Foundation (NSF) (ECCS-1303476).
NR 16
TC 3
Z9 3
U1 1
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD SEP 1
PY 2015
VL 40
IS 17
BP 4174
EP 4177
DI 10.1364/OL.40.004174
PG 4
WC Optics
SC Optics
GA CQ7UM
UT WOS:000360810200064
PM 26368740
ER
PT J
AU Haugan, T
AF Haugan, Timothy
TI Viewpoint on fast track communication by V Selvamanickam et al: Critical
current density above 15MA cm(-2) at 30K, 3T in 2.2 mu m thick
heavily-doped (Gd,Y)Ba2Cu3Ox superconductor tapes
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Editorial Material
C1 Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Haugan, T (reprint author), Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
NR 8
TC 1
Z9 1
U1 5
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
EI 1361-6668
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD SEP
PY 2015
VL 28
IS 9
AR 090502
DI 10.1088/0953-2048/28/9/090502
PG 3
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA CQ9NU
UT WOS:000360942700002
ER
PT J
AU DeCerbo, JN
Bray, KR
Merrett, JN
AF DeCerbo, J. N.
Bray, K. R.
Merrett, J. N.
TI Analysis of multilayered, nitrogen-doped aluminum oxide and hafnium
oxide dielectric films for wide-temperature capacitor applications
SO THIN SOLID FILMS
LA English
DT Article
DE Wide temperature; Capacitor; Dielectric; Hafnium oxide; Aluminum oxide
ID GATE DIELECTRICS; BAND ALIGNMENT
AB Capacitors with stable dielectric properties across a wide temperature range are a vital component in many power conditioning applications. High breakdown strength and low loss are also important for many applications. In this study, the dielectric properties of multilayer nitrogen-doped aluminum oxide and hafnium oxide films were characterized, comparing their properties to single layer films. The films were found to be stable from -50 to 200 degrees C and from 20 Hz to 1 MHz. An order of magnitude decrease in leakage current was observed for the bilayer films. Breakdown strength for the multilayer films increased up to 75%. This concurs with the hypothesis that the addition of dielectric interfaces provides area to trap and dissipate runaway charge moving through the dielectric, thus lowering leakage current and increasing the breakdown strength. Published by Elsevier B.V.
C1 [DeCerbo, J. N.; Merrett, J. N.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Bray, K. R.] UES Inc, Beavercreek, OH 45432 USA.
RP DeCerbo, JN (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, 2130 Eighth St, Wright Patterson AFB, OH 45433 USA.
EM jennifer.decerbo@us.af.mil
FU US Air Force Research Laboratory, Aerospace Systems Directorate
FX The authors would like to thank the US Air Force Research Laboratory,
Aerospace Systems Directorate for funding this research.
NR 16
TC 0
Z9 0
U1 1
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD SEP 1
PY 2015
VL 590
BP 71
EP 75
DI 10.1016/j.tsf.2015.07.047
PG 5
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA CR1BG
UT WOS:000361057100012
ER
PT J
AU Murphy, NR
Sun, LR
Jones, JG
Grant, JT
AF Murphy, Neil R.
Sun, Lirong
Jones, John G.
Grant, John T.
TI Hybrid co-deposition of mixed-valent molybdenum-germanium oxides
(MoxGeyOz): A route to tunable optical transmission
SO THIN SOLID FILMS
LA English
DT Article
DE Magnetron sputtering; Ellipsometry; X-ray photoelectron spectroscopy;
Mixed oxides; Germanium oxide; Molybdenum oxide; Thin film; Optical
characterization
ID LIGHT-EMITTING DEVICES; REACTIVE SPUTTERING PROCESSES; THIN-FILMS;
ELECTRONIC-STRUCTURE; METAL-OXIDES; ELECTROCHROMIC PROPERTIES; LASER
DEPOSITION; ALLOY TARGET; GEOX FILMS; MOO2
AB Mixed-valent oxides of molybdenum and germanium were deposited simultaneously using reactive magnetron co-deposition within an oxygen-argon environment. The films' stoichiometry, optical, and physical properties were varied through changes in oxygen partial pressure induced by systematic variation of the potential applied to the molybdenum cathode. The oxygen partial pressure was determined from the drop in pressure as measured by a capacitance manometer, assuming constant argon partial pressure. To facilitate deposition, a constant power of 100 W DC was applied to the germanium cathode, while power was applied to the molybdenum target using a modulated pulse power supply. Modulated pulse power magnetron sputtering was used due to its ability to generate high target power densities, allowing for rapid reduction of oxygen on the surface of the "oxygen poisoned" molybdenum cathode, as well as for its highly metallic plasma resulting in increased oxygen-gettering capability. Changes in the modulated pulse power supply's capacitor bank voltage load, stepped from settings of 300 to 380 V, resulted in films ranging from mixtures of transparent GeO2 (Ge4+) and MoO3 (Mo6+) to the introduction of various absorptive ionic species including Mo5+, Mo4+, Ge2+ and Ge-0, as determined from X-ray photoelectron spectroscopy. The presence of each of the aforementioned ions results in characteristic changes in the films' band energies and optical absorption. As deposited MoxGeyOz thin films grown using this method have been shown to have optical gap energies that are able to be tailored between 3.57 eV and 0.18 eV, spanning useful ranges for devices operating in the visible and near-infrared. Published by Elsevier B.V.
C1 [Murphy, Neil R.; Jones, John G.] Air Force Res Lab, Mat & Mfg Directorate, Dayton, OH 45433 USA.
[Sun, Lirong; Grant, John T.] Gen Dynam Informat Technol, Dayton, OH 45431 USA.
RP Murphy, NR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, 3500 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM neil.murphy.1@us.af.mil; lirong.sun.2.ctr@us.af.mil;
John.jones.66@us.af.mil; john.grant.5.ctr@us.af.mil
OI Jones, John/0000-0001-8271-0038; Grant, John/0000-0001-5243-4095
NR 94
TC 1
Z9 1
U1 5
U2 21
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD SEP 1
PY 2015
VL 590
BP 248
EP 259
DI 10.1016/j.tsf.2015.08.005
PG 12
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA CR1BG
UT WOS:000361057100038
ER
PT J
AU Petri, BG
Fucik, R
Illangasekare, TH
Smits, KM
Christ, JA
Sakaki, T
Sauck, CC
AF Petri, Benjamin G.
Fucik, Radek
Illangasekare, Tissa H.
Smits, Kathleen M.
Christ, John A.
Sakaki, Toshihiro
Sauck, Carolyn C.
TI Effect of NAPL Source Morphology on Mass Transfer in the Vadose Zone
SO GROUNDWATER
LA English
DT Article
ID NONAQUEOUS-PHASE LIQUID; UNSATURATED POROUS-MEDIA; SOIL VAPOR
EXTRACTION; VOLATILE ORGANIC-COMPOUNDS; AIR-FLOW RATE; WATER-CONTENT;
DIFFUSION-COEFFICIENTS; HYDROCARBON MIXTURES; FIELD EXPERIMENT; RESIDUAL
NAPL
AB The generation of vapor-phase contaminant plumes within the vadose zone is of interest for contaminated site management. Therefore, it is important to understand vapor sources such as non-aqueous-phase liquids (NAPLs) and processes that govern their volatilization. The distribution of NAPL, gas, and water phases within a source zone is expected to influence the rate of volatilization. However, the effect of this distribution morphology on volatilization has not been thoroughly quantified. Because field quantification of NAPL volatilization is often infeasible, a controlled laboratory experiment was conducted in a two-dimensional tank (28 cm x 15.5 cm x 2.5 cm) with water-wet sandy media and an emplaced trichloroethylene (TCE) source. The source was emplaced in two configurations to represent morphologies encountered in field settings: (1) NAPL pools directly exposed to the air phase and (2) NAPLs trapped in water-saturated zones that were occluded from the air phase. Airflow was passed through the tank and effluent concentrations of TCE were quantified. Models were used to analyze results, which indicated that mass transfer from directly exposed NAPL was fast and controlled by advective-dispersive-diffusive transport in the gas phase. However, sources occluded by pore water showed strong rate limitations and slower effective mass transfer. This difference is explained by diffusional resistance within the aqueous phase. Results demonstrate that vapor generation rates from a NAPL source will be influenced by the soil water content distribution within the source. The implications of the NAPL morphology on volatilization in the context of a dynamic water table or climate are discussed.
C1 [Petri, Benjamin G.; Illangasekare, Tissa H.; Smits, Kathleen M.; Sakaki, Toshihiro; Sauck, Carolyn C.] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
[Fucik, Radek] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic.
[Christ, John A.] US Air Force Acad, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
RP Petri, BG (reprint author), Colorado Sch Mines, Dept Civil & Environm Engn, 1500 Illinois St, Golden, CO 80401 USA.
EM bpetri@mymail.mines.edu
FU Czech Ministry of Education, Youth and Sports Project [KONTAKT II
LH14003]; Strategic Environmental Research and Development Program
[ER-1687]
FX The authors thank the Strategic Environmental Research and Development
Program Grant ER-1687: Vapor Intrusion from Entrapped NAPL Sources and
Groundwater Plumes: Process Understanding and Improved Modeling Tools
for Pathway Assessment and Numerical Methods for Multiphase Flow, and
also the Czech Ministry of Education, Youth and Sports Project KONTAKT
II LH14003: Development and Validation of Porous Media Fluid Dynamics
and Phase Transitions Models for Subsurface Environmental Application
for providing funding for this research. The authors also thank Dr.
Michal Benes of Czech Technical University for his gracious review and
suggestions on the project.
NR 61
TC 2
Z9 2
U1 3
U2 15
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0017-467X
EI 1745-6584
J9 GROUNDWATER
JI Groundwater
PD SEP-OCT
PY 2015
VL 53
IS 5
BP 685
EP 698
DI 10.1111/gwat.12284
PG 14
WC Geosciences, Multidisciplinary; Water Resources
SC Geology; Water Resources
GA CQ7BP
UT WOS:000360758100004
PM 25535651
ER
PT J
AU Chatfield, JA
Dewell, R
Miranda, AJ
Wilcox, S
Vannieuwenhoven, J
AF Chatfield, Jenifer A.
Dewell, Renee
Miranda, Astrid J.
Wilcox, Stefania
Vannieuwenhoven, J.
TI On-site veterinary medical evaluation and care of working dogs and
horses at the 2012 Republican National Convention
SO JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION
LA English
DT Article
ID SEPTEMBER-11
AB Objective-To describe on-site veterinary medical care for working dogs and horses deployed for the 2012 Republican National Convention (RNC) in Tampa, Fla, August 24 to 30, 2012.
Design-Retrospective case series.
Sample-130 dogs and 45 horses.
Procedures-Data collected included breed, age, history, task assignment, reason for evaluation, and physical examination findings. A patient encounter report was recorded each time an animal was seen by veterinary staff for a physical evaluation.
Results-46 of the 130 (35%) dogs and all 45 (100%) horses underwent at least 1 on-site veterinary evaluation, for a total of 478 patient encounters. The most common reason for an on-site veterinary evaluation was a wellness check (446 patient encounters). On the basis of veterinary recommendations, 1 dog and 4 horses were removed from continued service for the duration of the event. In addition, 1 dog and 1 horse were removed from active service for 12 to 24 hours but allowed to return to service for the duration of the event following a veterinary reevaluation.
Conclusions and Clinical Relevance-Results suggested that working dogs and horses deployed for large planned events face different health concerns, compared with concerns previously reported for animals deployed following disasters. Pre-event planning and training of handlers and riders may have helped reduce the number of health concerns, particularly health concerns related to high heat.
C1 [Chatfield, Jenifer A.; Dewell, Renee; Vannieuwenhoven, J.] Natl Vet Response Team, Washington, DC 20201 USA.
[Miranda, Astrid J.] MacDill AFB Vet Serv, Macdill Afb, FL 33621 USA.
[Wilcox, Stefania] 463rd Med Detachment Vet Serv Support, Ft Benning, GA 31905 USA.
RP Chatfield, JA (reprint author), Natl Vet Response Team, 330 Independence Ave SW,G-644, Washington, DC 20201 USA.
EM jen_chatfield@hotmail.com
NR 9
TC 0
Z9 0
U1 0
U2 6
PU AMER VETERINARY MEDICAL ASSOC
PI SCHAUMBURG
PA 1931 N MEACHAM RD SUITE 100, SCHAUMBURG, IL 60173-4360 USA
SN 0003-1488
EI 1943-569X
J9 JAVMA-J AM VET MED A
JI JAVMA-J. Am. Vet. Med. Assoc.
PD SEP 1
PY 2015
VL 247
IS 5
BP 539
EP 541
PG 3
WC Veterinary Sciences
SC Veterinary Sciences
GA CP4ME
UT WOS:000359855400038
PM 26295561
ER
PT J
AU Buentello-Hernandez, RG
Palazotto, A
AF Buentello-Hernandez, Rodolfo G.
Palazotto, Anthony
TI Development of a Model Considering High-Speed Sliding Wear
SO JOURNAL OF AEROSPACE ENGINEERING
LA English
DT Article
DE Wear; High velocity; Finite element; Viscoplasticity; Damage; Asperity
AB Wear is defined as "the removal of material volume through some mechanical process between two surfaces." This paper focuses on the steps necessary to evaluate wear due to dry sliding between two surfaces at high velocity. Currently, there is a need to identify and compare materials that can endure sliding wear under severe conditions such as high velocities. The high costs associated with the field experimentation of systems subject to high-speed sliding have prevented the collection of the necessary data required to characterize this phenomenon. Simulating wear through finite elements (FEs) would enable its prediction and would reduce experimentation. In the aerospace, automotive, and weapon industries, such a model can aid in material selection, design, and/or testing of systems subjected to wear. (C) 2014 American Society of Civil Engineers.
C1 [Buentello-Hernandez, Rodolfo G.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Palazotto, Anthony] Air Force Inst Technol, Dept Aeronaut & Astronaut, Aerosp Engn, Wright Patterson AFB, OH 45433 USA.
RP Palazotto, A (reprint author), Air Force Inst Technol, Dept Aeronaut & Astronaut, Aerosp Engn, Wright Patterson AFB, OH 45433 USA.
EM palazotto@sbcglobal.net
NR 7
TC 0
Z9 0
U1 1
U2 16
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0893-1321
EI 1943-5525
J9 J AEROSPACE ENG
JI J. Aerosp. Eng.
PD SEP
PY 2015
VL 28
IS 5
AR 04014140
DI 10.1061/(ASCE)AS.1943-5525.0000455
PG 10
WC Engineering, Aerospace; Engineering, Civil
SC Engineering
GA CP5PP
UT WOS:000359936100025
ER
PT J
AU Paul, S
Harris, PG
Sharma, AK
Ray, AK
AF Paul, Sharmistha
Harris, Paul G.
Sharma, Ashwani K.
Ray, Asim K.
TI Study of dielectric relaxation processes in printable zinc oxide films
on transparent substrates
SO JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; ELECTRICAL-CONDUCTIVITY; SINGLE-CRYSTAL;
THIN-FILMS; TEMPERATURE; IMPEDANCE; ELECTROLYTES; SPECTROSCOPY
AB AC impedance spectroscopic measurements have been performed on sol-gel derived zinc oxide (ZnO) films on transparent fluorine-doped tin oxide coated glass substrates in the frequency range 10(-2) to 10(6) Hz over the temperature range -185 to +25 A degrees C (88-298 K). The relaxation behaviour of the nanocrystal line ZnO thin film can be described in terms of the Debye model giving an interpretation of the semi-circular relaxation phenomenon within the given temperature range. Two different relaxation times were obtained from impedance (Z) and electric modulus (M) studies of the devices and the multiple hopping of charge carriers between trap sites in grain and grain-boundary regions is believed to be responsible for charge transport. The values of activation energies for trap levels obtained from AC conductivity study are 0.0153 and 0.0487 eV which are close to the activation energies obtained from DC electrical measurement for temperature region between 88 and 178 K and 179 and 298 K, respectively.
C1 [Paul, Sharmistha; Harris, Paul G.; Ray, Asim K.] Brunel Univ, Inst Mat & Mfg, Uxbridge UB8 3PH, Middx, England.
[Sharma, Ashwani K.] USAF, Se Kirtland AFB, Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
[Paul, Sharmistha] Bikash Bhavan, West Bengal State Council Sci & Technol, Kolkata 700091, India.
RP Ray, AK (reprint author), Brunel Univ, Inst Mat & Mfg, Uxbridge UB8 3PH, Middx, England.
EM Asim.Ray@brunel.ac.uk
FU Air Force Office of Scientific Research, Air Force Material Command,
USAF [FA8655-08-1-3056]
FX This work is sponsored by the Air Force Office of Scientific Research,
Air Force Material Command, USAF, under Grant No. FA8655-08-1-3056.
NR 32
TC 0
Z9 0
U1 4
U2 19
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0957-4522
EI 1573-482X
J9 J MATER SCI-MATER EL
JI J. Mater. Sci.-Mater. Electron.
PD SEP
PY 2015
VL 26
IS 9
BP 7109
EP 7116
DI 10.1007/s10854-015-3333-4
PG 8
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA CO8XC
UT WOS:000359454500106
ER
PT J
AU Wagner, DE
Neupauer, RM
Cichowitz, C
AF Wagner, David E.
Neupauer, Roseanna M.
Cichowitz, Cody
TI Adjoint-Based Probabilistic Source Characterization in
Water-Distribution Systems with Transient Flows and Imperfect Sensors
SO JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
LA English
DT Article
DE Water distribution systems; Water quality; Mathematical models;
Probability; Adjoint state
ID CONTAMINATION SOURCE IDENTIFICATION; INTENTIONAL CONTAMINATION;
DISTRIBUTION NETWORKS; UNCERTAINTY; SECURITY; MODEL
AB If a contamination event occurs in a water distribution system, sensors in the network may observe water quality changes. The data from these sensors can be used to identify the source of the contamination. The sensors can be binary sensors that record the presence or absence of contamination, fuzzy sensors that measure concentration within a set range, or perfect sensors that measure the exact concentration within the bounds of measurement uncertainty. This work presents an adjoint-based probabilistic approach for identifying the source node, source release time, and source strength for an instantaneous release of contamination based on sensor observations and known system hydraulics. In the adjoint approach, information is propagated upgradient from the sensors to the possible source nodes. EPANET is used to simulate the transient hydraulics of the pipe network and the upgradient propagation of the adjoint state through the network. The resulting adjoint states are related to probability density functions of the source release times at all possible source nodes. For fuzzy or perfect sensors, these probabilities can be used to determine the most likely source node. A hypothetical example is used to show that this method is accurate, even for a small number of sensor observations and complex hydraulics. (C) 2015 American Society of Civil Engineers.
C1 [Wagner, David E.] US Air Force, Holloman Afb, NM 88330 USA.
[Neupauer, Roseanna M.] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
[Cichowitz, Cody] Johns Hopkins Univ, Sch Med, Buena Vista, CO 81211 USA.
RP Wagner, DE (reprint author), Univ Colorado, Dept Civil Environm & Architectural Engn, 1111 Engn Dr, Boulder, CO 80309 USA.
EM neupauer@colorado.edu
OI Cichowitz, Cody/0000-0002-9029-6508; NEUPAUER,
ROSEANNA/0000-0002-4918-810X
FU Air Force Medical Service Air Force Institute of Technology Civilian
Institution Program; National Science Foundation [DMS-0602284]
FX This work was funded in part by the Air Force Medical Service Air Force
Institute of Technology Civilian Institution Program and by the National
Science Foundation under Grant DMS-0602284. The authors thank three
anonymous reviewers for their valuable comments on this paper.
NR 26
TC 1
Z9 1
U1 1
U2 5
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0733-9496
EI 1943-5452
J9 J WATER RES PLAN MAN
JI J. Water Resour. Plan. Manage.-ASCE
PD SEP
PY 2015
VL 141
IS 9
AR 04015003
DI 10.1061/(ASCE)WR.1943-5452.0000508
PG 11
WC Engineering, Civil; Water Resources
SC Engineering; Water Resources
GA CP5TI
UT WOS:000359947100004
ER
PT J
AU Levine, JA
Bukowinski, AT
Sevick, CJ
Mehlhaff, KM
Conlin, AMS
AF Levine, Jordan A.
Bukowinski, Anna T.
Sevick, Carter J.
Mehlhaff, Krista M.
Conlin, Ava Marie S.
TI Postpartum depression and timing of spousal military deployment relative
to pregnancy and delivery
SO ARCHIVES OF GYNECOLOGY AND OBSTETRICS
LA English
DT Article
DE Postpartum depression; Women's health; Military deployment; Mental
health
ID BIRTH-DEFECTS SURVEILLANCE; MATERNAL DEPRESSION; TREATMENT FACILITY;
PRIMARY-CARE; RISK-FACTORS; HEALTH; WIVES; SYMPTOMS; IMPACT; PREVALENCE
AB This study aimed to determine the relationship between spousal deployment and postpartum depression diagnosis among U.S. military wives, accounting for the timing of deployment with respect to pregnancy and delivery.
A retrospective cohort study was conducted to evaluate the association between spousal deployment and postpartum depression among pregnant wives of active-duty service members. Electronic medical records for 161,454 births occurring between 2004 and 2009 were used to define postpartum depression. Three non-mutually exclusive exposure variables were created to categorize deployments as occurring before, during, or after the infant's delivery. A multivariable logistic regression model mutually adjusted for these exposure variables was fitted, producing an odds ratio for each of the three timing categories.
A modest significant association was detected only in those whose husbands deployed in pregnancy and returned after delivery (i.e., deployed during delivery) [odds ratio (OR) 1.10, 95 % confidence interval (CI) 1.04-1.15]. An interactive effect between preexisting depression or anxiety and deployment during delivery was also detected in the data (OR 1.13, 95 % CI 1.07-1.20 for those without a preexisting diagnosis; OR 0.87, 95 % CI 0.80-0.95 for those with a preexisting diagnosis).
Health care providers should continue to be aware of spousal deployment as a military-unique stressor in this population and rigorously screen for potential symptoms of postpartum depression, especially among those whose husbands are absent at delivery.
C1 [Levine, Jordan A.; Bukowinski, Anna T.; Sevick, Carter J.; Conlin, Ava Marie S.] Naval Hlth Res Ctr, Deployment Hlth Res Dept, San Diego, CA 92106 USA.
[Mehlhaff, Krista M.] Wright Patterson Air Force Base, Dayton, OH 45433 USA.
RP Levine, JA (reprint author), Naval Hlth Res Ctr, Deployment Hlth Res Dept, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM jordan.levine@med.navy.mil
NR 38
TC 2
Z9 2
U1 1
U2 3
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 0932-0067
EI 1432-0711
J9 ARCH GYNECOL OBSTET
JI Arch. Gynecol. Obstet.
PD SEP
PY 2015
VL 292
IS 3
BP 549
EP 558
DI 10.1007/s00404-015-3672-7
PG 10
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA CO7YO
UT WOS:000359380100016
PM 25731150
ER
PT J
AU Bogdanor, MJ
Oskay, C
Clay, SB
AF Bogdanor, Michael J.
Oskay, Caglar
Clay, Stephen B.
TI Multiscale modeling of failure in composites under model parameter
uncertainty
SO COMPUTATIONAL MECHANICS
LA English
DT Article
DE Fiber reinforced composites; Stochastic failure prediction; Multiscale
models; Random material properties; Spatial variability
ID HOMOGENIZATION METHOD; HETEROGENEOUS MATERIALS; ELASTIC PROPERTIES;
DENSITY-FUNCTION; QUANTIFICATION; PLATES
AB This manuscript presents a multiscale stochastic failure modeling approach for fiber reinforced composites. A homogenization based reduced-order multiscale computational model is employed to predict the progressive damage accumulation and failure in the composite. Uncertainty in the composite response is modeled at the scale of the microstructure by considering the constituent material (i.e., matrix and fiber) parameters governing the evolution of damage as random variables. Through the use of the multiscale model, randomness at the constituent scale is propagated to the scale of the composite laminate. The probability distributions of the underlying material parameters are calibrated from unidirectional composite experiments using a Bayesian statistical approach. The calibrated multiscale model is exercised to predict the ultimate tensile strength of quasi-isotropic open-hole composite specimens at various loading rates. The effect of random spatial distribution of constituent material properties on the composite response is investigated.
C1 [Bogdanor, Michael J.; Oskay, Caglar] Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA.
[Clay, Stephen B.] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Oskay, C (reprint author), Vanderbilt Univ, Dept Civil & Environm Engn, VU Stn B 351831,2301 Vanderbilt Pl, Nashville, TN 37235 USA.
EM caglar.oskay@vanderbilt.edu
FU Aerospace Systems Directorate of the Air Force Research Laboratory
through Engility Corporation [GS04T09DBC0017]; Department of Defense
(DoD) through the National Defense Science & Engineering Graduate
Fellowship (NDSEG) Program
FX The authors gratefully acknowledge the financial support provided by the
Aerospace Systems Directorate of the Air Force Research Laboratory
(Contract No: GS04T09DBC0017 through Engility Corporation) and the
Department of Defense (DoD) through the National Defense Science &
Engineering Graduate Fellowship (NDSEG) Program.
NR 41
TC 6
Z9 6
U1 5
U2 21
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0178-7675
EI 1432-0924
J9 COMPUT MECH
JI Comput. Mech.
PD SEP
PY 2015
VL 56
IS 3
BP 389
EP 404
DI 10.1007/s00466-015-1177-7
PG 16
WC Mathematics, Interdisciplinary Applications; Mechanics
SC Mathematics; Mechanics
GA CO7YZ
UT WOS:000359381500001
ER
PT J
AU Ramasamy, RP
AF Ramasamy, Ramaraja P.
TI Bioelectrochemical Energy Conversion Technologies
SO Electrochemical Society Interface
LA English
DT Editorial Material
C1 [Ramasamy, Ramaraja P.] Univ South Carolina, Columbia, SC 29208 USA.
[Ramasamy, Ramaraja P.] Penn State Univ, University Pk, PA 16802 USA.
[Ramasamy, Ramaraja P.] PEM Fuel Cells, Washington, DC USA.
[Ramasamy, Ramaraja P.] Air Force Res Lab, Bioelectrochem Energy Convers Technol, Wright Patterson AFB, OH USA.
[Ramasamy, Ramaraja P.] Univ Georgia, Biochem Engn, Athens, GA 30602 USA.
[Ramasamy, Ramaraja P.] Univ Georgia, Nano Electrochem Lab, Athens, GA 30602 USA.
RP Ramasamy, RP (reprint author), Univ South Carolina, Columbia, SC 29208 USA.
EM rama@uga.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1064-8208
EI 1944-8783
J9 ELECTROCHEM SOC INTE
JI Electrochem. Soc. Interface
PD FAL
PY 2015
VL 24
IS 3
BP 53
EP 53
DI 10.1149/2.F01153if
PG 1
WC Electrochemistry
SC Electrochemistry
GA DS3ZJ
UT WOS:000380720900003
ER
PT J
AU Sekar, N
Ramasamy, RP
AF Sekar, Narendran
Ramasamy, Ramaraja P.
TI Photosynthetic Energy Conversion: Recent Advances and Future Perspective
SO Electrochemical Society Interface
LA English
DT Article
ID SP PCC 6803; ELECTRON-TRANSFER; PHOTOSYSTEM-II; PHOTOCURRENT GENERATION;
HYDROGEN-PRODUCTION; SYNECHOCOCCUS SP; CARBON-DIOXIDE; FUEL-CELLS;
CYANOBACTERIA; WATER
C1 [Sekar, Narendran] Univ Georgia, Biol & Agr Engn, Athens, GA 30602 USA.
[Ramasamy, Ramaraja P.] Univ South Carolina, Columbia, SC USA.
[Ramasamy, Ramaraja P.] Penn State Univ, University Pk, PA 16802 USA.
[Ramasamy, Ramaraja P.] PEM Fuel Cells, Washington, DC USA.
[Ramasamy, Ramaraja P.] Air Force Res Lab, Bioelectrochem Energy Convers Technol, Wright Patterson AFB, OH USA.
[Ramasamy, Ramaraja P.] Univ Georgia, Biochem Engn, Athens, GA 30602 USA.
[Ramasamy, Ramaraja P.] Univ Georgia, Nano Electrochem Lab, Athens, GA 30602 USA.
RP Sekar, N (reprint author), Univ Georgia, Biol & Agr Engn, Athens, GA 30602 USA.
EM naren@uga.edu; rama@uga.edu
NR 59
TC 1
Z9 1
U1 2
U2 4
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1064-8208
EI 1944-8783
J9 ELECTROCHEM SOC INTE
JI Electrochem. Soc. Interface
PD FAL
PY 2015
VL 24
IS 3
BP 67
EP 73
DI 10.1149/2.F04153if
PG 7
WC Electrochemistry
SC Electrochemistry
GA DS3ZJ
UT WOS:000380720900006
ER
PT J
AU Exarchos, I
Tsiotras, P
Pachter, M
AF Exarchos, Ioannis
Tsiotras, Panagiotis
Pachter, Meir
TI On the Suicidal Pedestrian Differential Game
SO DYNAMIC GAMES AND APPLICATIONS
LA English
DT Article
DE Pursuit-evasion; Game of two cars; Zermelo's navigation problem
ID CURVATURE CONSTRAINTS; PURSUIT; NAVIGATION; STRATEGIES; PLANE
AB We consider the following differential game of pursuit and evasion involving two participating players: an evader, which has limited maneuverability, and an agile pursuer. The agents move on the Euclidean plane with different but constant speeds. Whereas the pursuer can change the orientation of its velocity vector arbitrarily fast, that is, he is a "pedestrian" a la Isaacs, the evader cannot make turns having a radius smaller than a specified minimum turning radius. This problem can be seen as a reversed Homicidal Chauffeur game, hence the name "Suicidal Pedestrian Differential Game." The aim of this paper is to derive the optimal strategies of the two players and characterize the initial conditions that lead to capture if the pursuer acts optimally, and areas that guarantee evasion regardless of the pursuer's strategy. Both proximity-capture and point-capture are considered. After applying the optimal strategy for the evader, it is shown that the case of point-capture reduces to a special version of Zermelo's Navigation Problem (ZNP) for the pursuer. Therefore, the well-known ZNP solution can be used to validate the results obtained through the differential game framework, as well as to characterize the time-optimal trajectories. The results are directly applicable to collision avoidance in maritime and Air Traffic Control applications.
C1 [Exarchos, Ioannis; Tsiotras, Panagiotis] Georgia Inst Technol, Dept Aerosp Engn, Atlanta, GA 30332 USA.
[Pachter, Meir] US Air Force, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Tsiotras, P (reprint author), Georgia Inst Technol, Dept Aerosp Engn, Atlanta, GA 30332 USA.
EM exarchos@gatech.edu; tsiotras@gatech.edu; Meir.Pachter@afit.edu
FU AFOSR [FA9550-13-0029]; NSF [CMMI-1160780]; A. S. Onassis Public Benefit
Foundation
FX This work was supported in part by the AFOSR Award No. FA9550-13-0029
and NSF Award No. CMMI-1160780. The first author also gratefully
acknowledges support from the A. S. Onassis Public Benefit Foundation.
NR 34
TC 3
Z9 3
U1 0
U2 2
PU SPRINGER BIRKHAUSER
PI NEW YORK
PA 233 SPRING STREET, 6TH FLOOR, NEW YORK, NY 10013 USA
SN 2153-0785
EI 2153-0793
J9 DYN GAMES APPL
JI Dyn. Games Appl.
PD SEP
PY 2015
VL 5
IS 3
BP 297
EP 317
DI 10.1007/s13235-014-0130-2
PG 21
WC Mathematics, Interdisciplinary Applications
SC Mathematics
GA CO6FK
UT WOS:000359252400002
ER
PT J
AU Scott-Emuakpor, O
Schwartz, J
George, T
Holycross, C
Cross, C
Slater, J
AF Scott-Emuakpor, O.
Schwartz, J.
George, T.
Holycross, C.
Cross, C.
Slater, J.
TI Bending fatigue life characterisation of direct metal laser sintering
nickel alloy 718
SO FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
LA English
DT Article
DE bending fatigue; statistical model strength; nickel base superalloy;
vibration
ID MECHANICAL-BEHAVIOR; TI-6AL-4V; STRESS; MICROSTRUCTURE; SUPERALLOY
AB Bending fatigue behaviour of direct metal laser sintering (DMLS), Nickel (Ni) Alloy 718 has been assessed as preliminary qualification to additively manufacture advanced gas turbine engine components. Motivation for this work comes from the possibility of using DMLS to improve functionality of hot-section components. By using DMLS, turbine blades and heat exchangers cooling passages can be enhanced, leading to improved engine performance. This study focuses on vibratory high cycle fatigue (HCF) assessment of DMLS Ni Alloy 718 from two suppliers. Specimens were fatigued via vibration-based bending and compared with published rotating bending cold-rolled Ni Alloy 718. Tensile analysis and microscopy were also conducted to understand fatigue and fracture trends. HCF, tensile properties and microscopy comparisons show that fatigue and strength of DMLS Ni may be sensitive to post-fusion treatments. Nonetheless, fatigue performance of DMLS Ni compares well with rotating bending fatigue of cold-rolled Ni.
C1 [Scott-Emuakpor, O.; Schwartz, J.; George, T.; Holycross, C.; Cross, C.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Slater, J.] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
RP Scott-Emuakpor, O (reprint author), Air Force Res Lab, Aerosp Syst Directorate, 1950 Fifth St,Bldg 18D, Wright Patterson AFB, OH 45433 USA.
EM onome.scott-emuakpor@wpafb.af.mil
FU Turbine Engine Fatigue Facility (TEFF) of the United States Air Force
Research Laboratory (AFRL); Universal Technology Corporation (UTC);
Department of Mechanical Engineering at Wright State University;
Department of Mechanical Engineering at The Ohio State University;
Department of Aerospace Engineering at The Ohio State University
FX The authors would like to thank the following organisations for funding,
support and collaboration: the Turbine Engine Fatigue Facility (TEFF) of
the United States Air Force Research Laboratory (AFRL), Universal
Technology Corporation (UTC), the Department of Mechanical Engineering
at Wright State University and the Departments of Mechanical and
Aerospace Engineering at The Ohio State University. Also, the authors
would like to acknowledge UTC contractor Tyler Kennedy for contributing
to laboratory testing.
NR 28
TC 7
Z9 7
U1 3
U2 22
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 8756-758X
EI 1460-2695
J9 FATIGUE FRACT ENG M
JI Fatigue Fract. Eng. Mater. Struct.
PD SEP
PY 2015
VL 38
IS 9
SI SI
BP 1105
EP 1117
DI 10.1111/ffe.12286
PG 13
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA CO6UX
UT WOS:000359293400010
ER
PT J
AU Fuchi, K
Buskohl, PR
Bazzan, G
Durstock, MF
Reich, GW
Vaia, RA
Joo, JJ
AF Fuchi, Kazuko
Buskohl, Philip R.
Bazzan, Giorgio
Durstock, Michael F.
Reich, Gregory W.
Vaia, Richard A.
Joo, James J.
TI Origami Actuator Design and Networking Through Crease Topology
Optimization
SO JOURNAL OF MECHANICAL DESIGN
LA English
DT Article
ID COMPLIANT MECHANISMS; HOMOGENIZATION METHOD; STIFFNESS; PAPER; SHAPE
AB Origami structures morph between 2D and 3D conformations along predetermined fold lines that efficiently program the form of the structure and show potential for many engineering applications. However, the enormity of the design space and the complex relationship between origami-based geometries and engineering metrics place a severe limitation on design strategies based on intuition. The presented work proposes a systematic design method using topology optimization to distribute foldline properties within a reference crease pattern, adding or removing folds through optimization, for a mechanism design. Optimization techniques and mechanical analysis are co-utilized to identify an action origami building block and determine the optimal network connectivity between multiple actuators. Foldable structures are modeled as pin-joint truss structures with additional constraints on fold, or dihedral, angles. A continuous tuning of foldline stiffness leads to a rigid-to-compliant transformation of the local foldline property, the combination of which results in origami crease design optimization. The performance of a designed origami mechanism is evaluated in 3D by applying prescribed forces and finding displacements at set locations. A constraint on the number of foldlines is used to tune design complexity, highlighting the value-add of an optimization approach. Together, these results underscore that the optimization of function, in addition to shape, is a promising approach to origami design and motivates the further development of function-based origami design tools.
C1 [Fuchi, Kazuko] Wright State Res Inst, Beavercreek, OH 45431 USA.
[Buskohl, Philip R.; Durstock, Michael F.; Reich, Gregory W.; Vaia, Richard A.; Joo, James J.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Bazzan, Giorgio] UES Inc, Beavercreek, OH 45432 USA.
RP Joo, JJ (reprint author), US Air Force, Res Lab, 2210 Eighth St, Wright Patterson AFB, OH 45433 USA.
EM kazuko.fuchi@wright.edu; philip.buskohl.1@us.af.mil;
giorgio.bazzan.1.ctr@us.af.mil; michael.durstock@us.af.mil;
gregory.reich.1@us.af.mil; richard.vaia@us.af.mil; james.joo.1@us.af.mil
FU Air Force Office of Scientific Research (AFOSR) [LRIR 13RQ02COR]
FX This research was supported under the Air Force Office of Scientific
Research (AFOSR) funding, LRIR 13RQ02COR. The authors would like to
thank Dr. Joycelyn Harrison and Dr. David Stargel for their enthusiasm
and support of the project.
NR 35
TC 4
Z9 4
U1 5
U2 27
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1050-0472
J9 J MECH DESIGN
JI J. Mech. Des.
PD SEP
PY 2015
VL 137
IS 9
AR 091401
DI 10.1115/1.4030876
PG 10
WC Engineering, Mechanical
SC Engineering
GA CO5HU
UT WOS:000359191000002
ER
PT J
AU Semiatin, SL
Fagin, PN
Goetz, RL
Furrer, DU
Dutton, RE
AF Semiatin, S. L.
Fagin, P. N.
Goetz, R. L.
Furrer, D. U.
Dutton, R. E.
TI Characterization of Plastic Flow Pertinent to the Evolution of Bulk
Residual Stress in Powder-Metallurgy, Nickel-Base Superalloys
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID SUPERSOLVUS HEAT-TREATMENT; MICROSTRUCTURE EVOLUTION; HOT-WORKING;
RECRYSTALLIZATION; DEFORMATION; BEHAVIOR
AB The plastic-flow behavior which controls the formation of bulk residual stresses during final heat treatment of powder-metallurgy (PM), nickel-base superalloys was quantified using conventional (isothermal) stress-relaxation (SR) tests and a novel approach which simulates concurrent temperature and strain transients during cooling following solution treatment. The concurrent cooling/straining test involves characterization of the thermal compliance of the test sample. In turn, this information is used to program the ram-displacement-vs-time profile to impose a constant plastic strain rate during cooling. To demonstrate the efficacy of the new approach, SR tests (in both tension and compression) and concurrent cooling/tension-straining experiments were performed on two PM superalloys, LSHR and IN-100. The isothermal SR experiments were conducted at a series of temperatures between 1144 K and 1436 K (871 A degrees C and 1163 A degrees C) on samples that had been supersolvus solution treated and cooled slowly or rapidly to produce starting microstructures comprising coarse gamma grains and coarse or fine secondary gamma-prime precipitates, respectively. The concurrent cooling/straining tests comprised supersolvus solution treatment and various combinations of subsequent cooling rate and plastic strain rate. Comparison of flow-stress data from the SR and concurrent cooling/straining tests showed some similarities and some differences which were explained in the context of the size of the gamma-prime precipitates and the evolution of dislocation substructure. The magnitude of the effect of concurrent deformation during cooling on gamma-prime precipitation was also quantified experimentally and theoretically.
C1 [Semiatin, S. L.] US Air Force, Res Lab, Mat & Mfg Directorate, Mat Proc Proc Sci, Wright Patterson AFB, OH 45433 USA.
[Dutton, R. E.] US Air Force, Res Lab, Mat & Mfg Directorate, Mfg & Ind Technol Div, Wright Patterson AFB, OH 45433 USA.
[Fagin, P. N.] UES Inc, Mat & Proc Div, Dayton, OH 45432 USA.
[Goetz, R. L.] Rolls Royce Corp, DSE Mat & Proc Modeling, Indianapolis, IN 46225 USA.
[Furrer, D. U.] Pratt & Whitney Mat & Proc Engn, E Hartford, CT 06108 USA.
RP Semiatin, SL (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Mat Proc Proc Sci, Wright Patterson AFB, OH 45433 USA.
EM sheldon.semiatin@us.af.mil
RI SEMIATIN, SHELDON/E-7264-2017
FU [FA8650-10-D-5226]
FX This work was conducted as part of the in-house research of the Metals
Branch of the Air Force Research Laboratory's Materials and
Manufacturing Directorate in support of the Laboratory's Foundational
Engineering Problem (FEP) on bulk residual-stress development in
superalloys. The support and encouragement of the FEP Program Managers
(Drs. T.J. Turner and M.J. Caton) are gratefully acknowledged. The
authors also thank G.A. Sargent and T.A. Parthasarathy for technical
discussions (on stress-relaxation testing and the modeling of strength
in nickel-base superalloys) and W.M. Saurber and E.F. Gaussa in
performing the metallography. One of the authors (PNF) was supported
under the auspices of contract FA8650-10-D-5226.
NR 33
TC 3
Z9 3
U1 3
U2 11
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD SEP
PY 2015
VL 46A
IS 9
BP 3943
EP 3959
DI 10.1007/s11661-015-3033-y
PG 17
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CO1TZ
UT WOS:000358939600022
ER
PT J
AU Bondok, D
Salim, H
Saucier, A
Dinan, R
AF Bondok, Doaa
Salim, Hani
Saucier, Aaron
Dinan, Robert
TI Static resistance function of cold-formed steel stud walls
SO THIN-WALLED STRUCTURES
LA English
DT Article
DE Cold-formed steel studs; Static resistance; Analytical models; Numerical
modeling
AB Previous research focused on the optimization of conventional stud-to-track wall systems for moderate blast threat level protection. It has been concluded that adding extra screws is a practical and an efficient solution for altering the failure mechanisms and increasing the blast resistant characteristics of these wall systems. This paper is focused on the evaluation of the static blast-resistance of conventional cold-formed steel stud wall systems. A general analytical model of the resistance, which is the first necessary step for performing dynamic response predictions under blast, is presented in this paper. A case study of sufficiently screwed stud-to-track connection is selected for further inspection and investigation. Particular emphasis is placed on the effect of including utility holes and sheathing on the static resistance of the wall system. For each experimental test, strain data were collected up to the failure point from a total of 11 longitudinal strain gauges installed on locations of interest. A finite element model was developed to include the sheathing effect and to add flexibility to the simulation of the conventional connection. Strain results provided insightful observations about the behavior of the stud and were used to validate the numerical simulations as well. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Bondok, Doaa; Salim, Hani; Saucier, Aaron] Univ Missouri, Civil Engn, Columbia, MO 65211 USA.
[Dinan, Robert] AFCEC COSC, Struct Engn, Tyndall AFB, FL USA.
RP Salim, H (reprint author), Univ Missouri, Civil Engn, Columbia, MO 65211 USA.
EM SalimH@missouri.edu; robert.dinan@us.af.mil
NR 15
TC 0
Z9 0
U1 5
U2 6
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0263-8231
EI 1879-3223
J9 THIN WALL STRUCT
JI Thin-Walled Struct.
PD SEP
PY 2015
VL 94
BP 177
EP 187
DI 10.1016/j.tws.2015.04.008
PG 11
WC Engineering, Civil
SC Engineering
GA CO7GV
UT WOS:000359328500018
ER
PT J
AU Senkov, ON
Miller, JD
Miracle, DB
Woodward, C
AF Senkov, O. N.
Miller, J. D.
Miracle, D. B.
Woodward, C.
TI Accelerated exploration of multi-principal element alloys for structural
applications
SO CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
LA English
DT Article
DE Alloy design; Structural metals; High entropy alloys; Multi-principal
element alloys; Calphad
ID HIGH-ENTROPY ALLOYS; DIRECT SYNTHESIS CALORIMETRY; TRANSITION-METAL
SILICIDES; MULTICOMPONENT ALLOYS; MECHANICAL-PROPERTIES; STANDARD
ENTHALPIES; SOLID-SOLUTION; MICROSTRUCTURE; PHASE; STABILITY
AB A strategy for accelerated discovery and exploration of multi-principal element alloys was developed and used to identify new alloys within a design window of desired microstructures and properties. As an example, the strategy was applied to analyze thousands of 3- 4-, 5- and 6-component alloys at equiatomic compositions of the alloying elements. Currently available thermodynamic databases were used to assess equilibrium phase diagrams for these alloys. The validity and reliability of the calculated phase diagrams were estimated based on the extent of experimental binary and ternary data used to build the respective thermodynamic databases. Alloys with specific characteristics, such as single-phase solid solution alloys with the use temperature above 1000 degrees C, were identified using an automated analysis of the calculated phase diagrams. The density, elastic moduli and costs of these alloys were estimated using the rule of mixtures of pure elements and were used as additional criteria for alloy selection. This approach allowed rapid, albeit preliminary, screening of many thousands of alloys and identification of promising candidate compositions, some of which are reported in this paper, for more time intensive experimental validations and assessments. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Senkov, O. N.; Miller, J. D.; Miracle, D. B.; Woodward, C.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Senkov, ON (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
OI Senkov, Oleg/0000-0001-5587-415X
FU AF [FA8650-10-5226]
FX Technical help from Mr. Adam Shiveley (AFRL) in writing a computer
script for automated, continuous running of multiple Pandat batch files
and numerous discussions with Dr. Fan Zhang (CompuTherm LLC) are greatly
appreciated. This work was conducted at the Air Force Research
Laboratory, Materials and Manufacturing Directorate. Work by ONS was
supported through the AF on-site Contract FA8650-10-5226 managed by UES,
Inc., Dayton, Ohio.
NR 54
TC 12
Z9 12
U1 11
U2 38
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0364-5916
EI 1873-2984
J9 CALPHAD
JI Calphad-Comput. Coupling Ph. Diagrams Thermochem.
PD SEP
PY 2015
VL 50
BP 32
EP 48
DI 10.1016/j.calphad.2015.04.009
PG 17
WC Thermodynamics; Chemistry, Physical; Materials Science,
Multidisciplinary; Metallurgy & Metallurgical Engineering
SC Thermodynamics; Chemistry; Materials Science; Metallurgy & Metallurgical
Engineering
GA CN5KJ
UT WOS:000358467900004
ER
PT J
AU Welsh, JA
Olson, J
Perkins, DF
Travis, WJ
Ormsby, L
AF Welsh, Janet A.
Olson, Jonathan
Perkins, Daniel F.
Travis, Wendy J.
Ormsby, LaJuana
TI The Role of Natural Support Systems in the Post-deployment Adjustment of
Active Duty Military Personnel
SO AMERICAN JOURNAL OF COMMUNITY PSYCHOLOGY
LA English
DT Article
DE Social support; Military deployment; Social adjustment
ID MENTAL-HEALTH PROBLEMS; SOCIAL SUPPORT; MAJOR DEPRESSION; LIFE STRESS;
SYMPTOMS; IRAQ; AFGHANISTAN; VETERANS; CONFLICT; FAMILIES
AB This study examined the relations among three different types of naturally occurring social support (from romantic partners, friends and neighbors, and unit leaders) and three indices of service member well-being (self reports of depressive symptoms, satisfaction with military life, and perceptions of unit readiness) for service members who did and did not report negative experiences associated with military deployment. Data were drawn from the 2011 Community Assessment completed anonymously by more than 63,000 USAF personnel. Regression analyses revealed that higher levels of social support was associated with better outcomes regardless of negative deployment experiences. Evidence of moderation was also noted, with all forms of social support moderating the impact of negative deployment experiences on depressive symptoms and support from unit leaders moderating the impact of negative deployment experience on satisfaction with military life. No moderation was found for perceptions of unit readiness. Subgroup analyses revealed slightly different patterns for male and female service members, with support providing fewer moderation effects for women. These findings may have value for military leaders and mental health professionals working to harness the power of naturally occurring relationships to maximize the positive adjustment of service members and their families. Implications for practices related to re-integration of post-deployment military personnel are discussed.
C1 [Welsh, Janet A.] Penn State Univ, Bennett Pierce Prevent Res Ctr, University Pk, PA 16802 USA.
[Welsh, Janet A.; Olson, Jonathan; Perkins, Daniel F.] Penn State Univ, University Pk, PA 16802 USA.
[Travis, Wendy J.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Ormsby, LaJuana] Air Force Med Operat Adm, University Pk, PA USA.
[Perkins, Daniel F.] Penn State Univ, Dept Agr Econ Sociol & Educ, University Pk, PA 16802 USA.
RP Welsh, JA (reprint author), Penn State Univ, Bennett Pierce Prevent Res Ctr, 320H Biobehav Hlth Bldg, University Pk, PA 16802 USA.
EM Jaw900@psu.edu
NR 41
TC 5
Z9 5
U1 3
U2 14
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0091-0562
EI 1573-2770
J9 AM J COMMUN PSYCHOL
JI Am. J. Community Psychol.
PD SEP
PY 2015
VL 56
IS 1-2
BP 69
EP 78
DI 10.1007/s10464-015-9726-y
PG 10
WC Public, Environmental & Occupational Health; Psychology,
Multidisciplinary; Social Work
SC Public, Environmental & Occupational Health; Psychology; Social Work
GA CN4AK
UT WOS:000358370200007
PM 26148977
ER
PT J
AU Goff, GM
Black, JT
Beck, JA
AF Goff, Gary M.
Black, Jonathan T.
Beck, Joseph A.
TI Tracking maneuvering spacecraft with filter-through approaches using
interacting multiple models
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Adaptive estimation; Space situational awareness; Orbit determination
AB When spacecraft maneuver unknowingly, traditional orbit determination filters diverge. This paper postulates using Interacting Multiple Models and covariance inflation methods to filter-through unknown maneuvers. This work proposes accurate methods for real-time tracking of a non-cooperative, maneuvering spacecraft and compares the performance to traditional techniques. Results show that a filter-through Interacting Multiple Model orbit determination filter can converge on a post-maneuver orbit in real-time with similar performance to off-line Initial Orbit Determination approaches. (C) 2015 Published by Elsevier Ltd. on behalf of IAA.
C1 [Goff, Gary M.; Black, Jonathan T.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Beck, Joseph A.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Goff, GM (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM gary.goff@us.af.mil
RI Black, Jonathan/R-4875-2016
OI Black, Jonathan/0000-0001-9315-3994
NR 27
TC 2
Z9 2
U1 2
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
EI 1879-2030
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD SEP-OCT
PY 2015
VL 114
BP 152
EP 163
DI 10.1016/j.actaastro.2015.05.009
PG 12
WC Engineering, Aerospace
SC Engineering
GA CM7VX
UT WOS:000357905700016
ER
PT J
AU Kaspi, R
Lu, CT
Yang, C
Newell, TC
Luong, S
AF Kaspi, Ron
Lu, Chunte
Yang, Chi
Newell, Timothy C.
Luong, Sanh
TI Desorption mass spectrometry: Revisiting the in-situ calibration
technique for mixed group-V alloy MBE growth of similar to 3.3 mu m
diode lasers
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article; Proceedings Paper
CT 18th International Conference on Molecular Beam Epitaxy (MBE 2014)
CY SEP 07-12, 2014
CL fLAGSTAFF, AZ
DE Molecular beam epitaxy; In-Situ monitoring; Desorption mass
spectrometry; Antimonides; Semiconducting quaternary alloys; Laser
diodes
ID MOLECULAR-BEAM EPITAXY; REFLECTION; INTERFACE
AB We apply the desorption mass spectrometry (DMS) technique and analyze the desorbed Sb species in-situ during MBE growth of mixed As/Sb heterostructures. We demonstrate how DMS is useful in pregrowth calibration of the Vila ratio, the group-Ill ratio, as well as the Sb-content in quaternary or quinary mixed As/Sb alloys. We also apply DMS to the digital alloy growth method. For demonstration purposes, we start with an un-calibrated MBE system, use the DMS technique to calibrate all of the previously undetermined MBE parameters and grow a similar to 3.3 mu m diode laser heterostructure in only one attempt. The results demonstrate that the DMS technique will allow the MBE to quickly converge toward a set of acceptable growth parameters without the need for ex-situ calibration of alloy composition. Published by Elsevier B.V.
C1 [Kaspi, Ron; Lu, Chunte; Yang, Chi; Newell, Timothy C.; Luong, Sanh] AFRL RDLTD, Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Kaspi, R (reprint author), AFRL RDLTD, Air Force Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
EM ron.kaspi@us.af.mil
FU US Air Force Office Scientific Research
FX We gratefully acknowledge the US Air Force Office Scientific Research
for providing funding for this work. We are also grateful for the use of
the Center for Integrated Nanotechnologies (CINT) facility at the Sandia
National Laboratory, where the diode laser devices were fabricated by
AFRL personnel.
NR 20
TC 1
Z9 1
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD SEP 1
PY 2015
VL 425
BP 5
EP 8
DI 10.1016/j.jcrysgro.2015.02.009
PG 4
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA CL0YO
UT WOS:000356669200003
ER
PT J
AU Haugan, HJ
Brown, GJ
Elhamri, S
Grazulis, L
AF Haugan, H. J.
Brown, G. J.
Elhamri, S.
Grazulis, L.
TI Control of anion incorporation in the molecular beam epitaxy of ternary
antimonide superlattices for very long wavelength infrared detection
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article; Proceedings Paper
CT 18th International Conference on Molecular Beam Epitaxy (MBE 2014)
CY SEP 07-12, 2014
CL fLAGSTAFF, AZ
DE Superlattices; Molecular beam epitaxy; Antimonides; Infrared detector
ID HETEROSTRUCTURES
AB Authors discuss how anion incorporation was controlled during the epitaxial growth process to develop InAs/GaInSb superlattice (SL) materials for very long wavelength infrared applications. A SL structure of 47.0 angstrom InAs/21.5 angstrom Ga0.75In0.25Sb was selected to create a very narrow band gap. Although a molecular beam epitaxy growth developed can produce a strain balanced ternary SL structure with a precisely controlled band gap around 50 meV, the material quality of grown SL layers is particularly sensitive to growth detects formed during an anion incorporation process. Since Group III antisites are the dominant structural defects responsible for the low radiative efficiencies, the authors focus on stabilizing III/V incorporation during SL layer growth by manipulating the growth surface condition for a specific anion cracking condition. The optimized ternary SL materials produced an overall strong photoresponse signal with a relatively sharp band edges and a high mobility of similar to 10,000 cm(2)/V s that is important for developing infrared materials. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Haugan, H. J.; Brown, G. J.; Grazulis, L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Elhamri, S.] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
RP Haugan, HJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM heather.haugan.ctr@us.af.mil
FU Air Force [FA8650-11-D-5800]
FX The work of H. J. Haugan was performed under Air Force contract number
FA8650-11-D-5800. The authors thank S. Bower, G. Landis and A. H.
Siwecki for a technical assistance with the MBE system and the sample
preparation and transport the measurements, respectively.
NR 10
TC 6
Z9 6
U1 1
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD SEP 1
PY 2015
VL 425
BP 25
EP 28
DI 10.1016/j.jcrysgro.2015.03.008
PG 4
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA CL0YO
UT WOS:000356669200008
ER
PT J
AU Gibson, R
Gehl, M
Sears, J
Zandbergen, S
Nader, N
Keiffer, P
Hendrickson, J
Arnoult, A
Khitrova, G
AF Gibson, Ricky
Gehl, Michael
Sears, Jasmine
Zandbergen, Sander
Nader, Nima
Keiffer, Patrick
Hendrickson, Joshua
Arnoult, Alexandre
Khitrova, Galina
TI Molecular beam epitaxy grown indium self-assembled plasmonic
nanostructures
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article; Proceedings Paper
CT 18th International Conference on Molecular Beam Epitaxy (MBE 2014)
CY SEP 07-12, 2014
CL fLAGSTAFF, AZ
DE Nanostructures; Molecular beam epitaxy; Metals; Semiconducting III-V
materials
AB We describe molecular beam epitaxy (MBE) growth conditions for self-assembled indium nanostructures, or islands, which allow for the tuning of the density and size of the indium nanostructures. How the plasmonic resonance of indium nanostructures is affected by the island density, size, distribution in sizes, and indium purity of the nanostructures is explored. These self-assembled nanostructures provide a platform for integration of resonant and non-resonant plasmonic structures within a few nm of quantum wells (QWs) or quantum dots (QDs) in a single process. A 4 x increase in peak photoluminescence intensity is demonstrated for near-surface QDs resonantly coupled to indium nanostructures. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Gibson, Ricky; Gehl, Michael; Sears, Jasmine; Zandbergen, Sander; Nader, Nima; Keiffer, Patrick; Khitrova, Galina] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
[Nader, Nima; Hendrickson, Joshua] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Nader, Nima] Solid State Sci Corp, Nahua, NH 03060 USA.
[Arnoult, Alexandre] CNRS, LAAS, F-31000 Toulouse, France.
RP Gibson, R (reprint author), Univ Arizona, Coll Opt Sci, 1630 E Univ Blvd, Tucson, AZ 85721 USA.
EM rgibson@optics.arizona.edu
FU Air Force Office of Scientific Research (AFOSR) [FA9550-13-1-0003,
12RY05COR]; National Science Foundation Atomic, Molecular and Optical
Physics [NSF-AMOP 1205031]; Engineering Research Center for Integrated
Access Networks (NSF ERC-CIAN) [EEC-0812072]; Department of Defense
through the National Defense Science and Engineering Graduate (NDSEG)
Fellowship Program; Arizona Technology and Research Initiative Funding
(TRIF); Department of Energy (DOE); RISE-ORAU [DE-AC05-060R23100]
FX We gratefully acknowledge the use of facilities with the LeRoy Eyring
Center for Solid State Science at Arizona State University. This work
was funded by the Air Force Office of Scientific Research (AFOSR, Dr.
Gernot Pomrenke, Grant FA9550-13-1-0003), the National Science
Foundation Atomic, Molecular and Optical Physics (NSF-AMOP 1205031) and
the Engineering Research Center for Integrated Access Networks (NSF
ERC-CIAN, Award EEC-0812072). MG would like to acknowledge the support
of the Department of Defense through the National Defense Science and
Engineering Graduate (NDSEG) Fellowship Program. JS would like to
acknowledge the support of Arizona Technology and Research Initiative
Funding (TRIF). SZ would like to acknowledge the support of the
Department of Energy (DOE) through the Office of Science Graduate
Fellowship (SCGF) made possible in part by the American Recovery and
Reinvestment Act of 2009, administered by RISE-ORAU under Contract no.
DE-AC05-060R23100. JH would like to acknowledge support from the Air
Force Office of Scientific Research (AFOSR, Program Manager - Dr. Gernot
Pomrenke, Contract 12RY05COR). AA would like to acknowledge support from
the French technology network RENATECH.
NR 13
TC 3
Z9 3
U1 5
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD SEP 1
PY 2015
VL 425
BP 307
EP 311
DI 10.1016/j.jcrysgro.2015.02.058
PG 5
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA CL0YO
UT WOS:000356669200071
ER
PT J
AU Winder, SL
Ruggles-Wrenn, MB
Parthasarathy, T
Key, T
Carney, CM
AF Winder, S. L.
Ruggles-Wrenn, M. B.
Parthasarathy, T.
Key, T.
Carney, C. M.
TI Thermo-chemical compatibility of hafnium diboride with yttrium aluminum
garnet at 1500 degrees C in air
SO JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
LA English
DT Article
DE HfB2; YAG; Stability
ID SINGLE-CRYSTAL YAG; OXIDATION RESISTANCE; ZIRCONIUM DIBORIDE; MONOCLINIC
ZIRCONIA; STABILIZED ZIRCONIA; PHYSICAL-PROPERTIES; FRACTURE-TOUGHNESS;
AL2O3-Y2O3 SYSTEM; CARBIDE ADDITIONS; TUNGSTEN CARBIDE
AB Due to its high thermal conductivity and oxidation resistance at very high temperatures, hafnium diboride (HfB2) is being considered for use as a leading edge material on sharp-bodied reentry vehicles. In structural applications, HfB2 is likely to operate at elevated temperature in proximity to other refractory materials. The thermo-chemical compatibility of HfB2 with (1) single-crystal Y3Al5O12 (SX YAG) and (2) Al2O3 (alumina) was examined in multiple contact combinations during furnace heat treatment exposures at 1500 degrees C in air. The reaction products were characterized using optical microscopy, SEM, EDS, and XRD. The results are presented and possible mechanisms are discussed. Published by Elsevier Ltd.
C1 [Winder, S. L.; Ruggles-Wrenn, M. B.] Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Parthasarathy, T.; Key, T.] UES Inc, Dayton, OH 45432 USA.
[Carney, C. M.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ruggles-Wrenn, MB (reprint author), Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM marina.ruggles-wrenn@afit.edu
RI Ruggles-Wrenn, Marina/J-6103-2014
FU Air Force Office of Scientific Research [F1ATA03039J001]
FX The support of the Air Force Office of Scientific Research (Grant
F1ATA03039J001), Dr. Ali Sayir, Program Director, is highly appreciated.
NR 49
TC 0
Z9 0
U1 2
U2 20
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0955-2219
EI 1873-619X
J9 J EUR CERAM SOC
JI J. Eur. Ceram. Soc.
PD SEP
PY 2015
VL 35
IS 9
BP 2437
EP 2444
DI 10.1016/j.jeurceramsoc.2015.03.022
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA CI1LI
UT WOS:000354505300001
ER
PT J
AU Shiffler, DA
Tang, W
Jensen, KL
Golby, K
LaCour, M
Petillo, JJ
Harris, JR
AF Shiffler, Donald A.
Tang, Wilkin
Jensen, Kevin L.
Golby, Ken
LaCour, Matthew
Petillo, John J.
Harris, John R.
TI Effective field enhancement factor and the influence of emitted space
charge
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ELECTRON-EMISSION; CARBON NANOTUBES; CATHODES; MODELS
AB Although Fowler and Nordheim developed the basics of field emission nearly one century ago with their introduction of the Fowler-Nordheim equation (FNE), the topic continues to attract research interest particularly with the development of new materials that have been proposed as field emitters. The first order analysis of experiments typically relies upon the FNE for at minimum a basic understand of the physical emission process and its parameters of emission. The three key parameters in the FNE are the work function, emission area, and field enhancement factor, all of which can be difficult to determine under experimental conditions. This paper focuses in particular, on the field enhancement factor beta. It is generally understood that b provides an indication of the surface roughness or sharpness of a field emitter cathode. However, in this paper, we experimentally and computationally demonstrate that cathodes with highly similar surface morphologies can manifest quite different field enhancements solely through having different emission regions. This fact can cause one to re-interpret results in which a single sharp emitter is proposed to dominate the emission from a field emitting cathode. (C) 2015 AIP Publishing LLC.
C1 [Shiffler, Donald A.; Tang, Wilkin] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
[Jensen, Kevin L.] Naval Res Lab, Code 6364, Washington, DC 20375 USA.
[Golby, Ken; LaCour, Matthew] Leidos Inc, Albuquerque, NM 87117 USA.
[Petillo, John J.] Leidos, Billerica, MA 01821 USA.
[Harris, John R.] US Navy Reserve, New Orleans, LA 70143 USA.
RP Shiffler, DA (reprint author), Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
OI Jensen, Kevin/0000-0001-8644-1680
FU AFOSR
FX We gratefully acknowledge financial support from J. Luginsland and J.
Marshall (AFOSR).
NR 30
TC 6
Z9 6
U1 2
U2 19
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD AUG 28
PY 2015
VL 118
IS 8
AR 083302
DI 10.1063/1.4929364
PG 6
WC Physics, Applied
SC Physics
GA CQ5PU
UT WOS:000360658600009
ER
PT J
AU McCollum, J
Pantoya, ML
Iacono, ST
AF McCollum, Jena
Pantoya, Michelle L.
Iacono, Scott T.
TI Activating Aluminum Reactivity with Fluoropolymer Coatings for Improved
Energetic Composite Combustion
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE aluminum powder; fluorine; combustion; aluminum fluoride; oligomers;
energetic materials; exothermic surface chemistry; preignition reaction
ID RAY PHOTOELECTRON-SPECTROSCOPY; THERMITE REACTIONS; NANO-AL; OXIDE;
AL/CUO; DEGRADATION; MIXTURES; CU
AB Aluminum (Al) particles are passivated by an aluminum oxide (Al2O3) shell. Energetic blends of nanometer-sized Al particles with liquid perfluorocarbon-based oxidizers such as perfluoropolyethers (PFPE) excite surface exothermic reaction between fluorine and the Al2O3 shell. The surface reaction promotes Al particle reactivity. Many Al-fueled composites use solid oxidizers that induce no Al2O3 surface exothermicity, such as molybdenum trioxide (MoO3) or copper oxide (CuO). This study investigates a perfluorinated polymer additive, PFPE, incorporated to activate Al reactivity in Al-CuO and Al-MoO3. Flame speeds, differential scanning calorimetry (DSC), and quadrupole mass spectrometry (QMS) were performed for varying percentages of PFPE blended with Al/MoO3 or Al/CuO to examine reaction kinetics and combustion performance. X-ray photoelectron spectroscopy (XPS) was performed to identify product species. Results show that the performance of the thermite-PFPE blends is highly dependent on the bond dissociation energy of the metal oxide. Fluorine-Al-based surface reaction with MoO3 produces an increase in reactivity, whereas the blends with CuO show a decline when the PFPE concentration is increased. These results provide new evidence that optimizing Al combustion can be achieved through activating exothermic Al surface reactions.
C1 [McCollum, Jena; Pantoya, Michelle L.] Texas Tech Univ, Dept Mech Engn, Lubbock, TX 79409 USA.
[Iacono, Scott T.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
[Iacono, Scott T.] US Air Force Acad, Chem Res Ctr, Colorado Springs, CO 80840 USA.
RP Pantoya, ML (reprint author), Texas Tech Univ, Dept Mech Engn, Lubbock, TX 79409 USA.
EM michelle.pantoya@ttu.edu
FU Army Research Office [W911NF-11-10439, W911NF-14-10250, 65092EGRIP]
FX We are thankful for support from Army Research Office Awards
W911NF-11-10439, W911NF-14-10250, and 65092EGRIP and encouragement from
our program manager, Dr. Ralph Anthenien. We acknowledge assistance from
Drs. Juliusz Warzywoda and Rumesa Tekin in the Materials
Characterization Facility in the Whitacre College of Engineering at
Texas Tech. We also gratefully acknowledge Dr. Steve Son for the solvent
dispersion advice with PFPE.
NR 37
TC 5
Z9 5
U1 4
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD AUG 26
PY 2015
VL 7
IS 33
BP 18742
EP 18749
DI 10.1021/acsami.5b05238
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA CQ0XN
UT WOS:000360322000065
PM 26263844
ER
PT J
AU Kramb, RC
Buskohl, PR
Dalton, MJ
Vaia, RA
AF Kramb, Ryan C.
Buskohl, Philip R.
Dalton, Matthew J.
Vaia, Richard A.
TI Belousov-Zhabotinsky Hydrogels: Relationship between Hydrogel Structure
and Mechanical Response
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID SELF-OSCILLATING GEL; COMPOSITE HYDROGELS; SYNCHRONICITY; COMPLEXES;
SYSTEMS; MOTION; WATER; BPY
AB The novel chemo-mechanical feedback within autonomic Belousov-Zhabotinsky (BZ) hydrogels mimics the complex adaptivity found in natural systems and inspires soft device concepts for chemical computing, sensing, and actuation. A quantitative relationship between the dynamic response, strain, BZ reagents, and hydrogel constituents, however, is still evolving due to a limited material suite. Using a modular synthesis strategy for free-radical BZ-catalyst monomers, we compare the impact of cross-linker, catalyst, and total polymer concentration on the cyclic strain of PNIPAm- and PAAm-based BZ hydrogels. The oscillator strain of the hydrogel in the BZ solution relative to the difference between equilibrium swelling of the fully oxidized and reduced states highlights the trade-off between BZ reaction kinetics, hydrogel elasticity, and catalyst concentration. For a PNIPAm-based BZ gel, a maximum strain of 20% occurs at a total polymer and [Ru] concentration of 4.8 +/- 0.5 mu g/mm(3) and 1.5 mM due to a complementary balance of Ru content, extended BZ period (33 +/- 8 min), and modest network cross-linking. The modular synthesis approach enables formulation studies to identify the BZ hydrogel architecture that provides maximum strain response and robustness, as well as elucidating the interrelationship between hydrogel structure, composition, and reaction conditions.
C1 [Kramb, Ryan C.; Buskohl, Philip R.; Dalton, Matthew J.; Vaia, Richard A.] Air Force Res Lab, AFRL RX Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Kramb, Ryan C.] UES Inc, Dayton, OH 45432 USA.
RP Vaia, RA (reprint author), Air Force Res Lab, AFRL RX Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@us.af.mil
FU Air Force Office of Scientific Research (AFOSR); Air Force Research
Laboratory's Materials and Manufacturing Directorate
FX The authors acknowledge the support of this research by the Air Force
Office of Scientific Research (AFOSR) and the Air Force Research
Laboratory's Materials and Manufacturing Directorate.
NR 38
TC 2
Z9 2
U1 11
U2 42
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
EI 1520-5002
J9 CHEM MATER
JI Chem. Mat.
PD AUG 25
PY 2015
VL 27
IS 16
BP 5782
EP 5790
DI 10.1021/acs.chemmater.5b02412
PG 9
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CQ0YE
UT WOS:000360323700040
ER
PT J
AU Wiens, JP
Shuman, NS
Miller, TM
Viggiano, AA
AF Wiens, Justin P.
Shuman, Nicholas S.
Miller, Thomas M.
Viggiano, Albert A.
TI Electron attachment and positive ion chemistry of monohydrogenated
fluorocarbon radicals
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID R-MATRIX METHOD; LANGMUIR PROBE TECHNIQUE; FLOWING AFTERGLOW; ORGANIC
RADICALS; COLLISIONS; CF2; TEMPERATURE; APPARATUS; DYNAMICS; KINETICS
AB Rate coefficients and product branching fractions for electron attachment and for reaction with Ar+ are measured over the temperature range 300-585 K for three monohydrogenated fluorocarbon (HFC) radicals (CF3CHF, CHF2CF2, and CF3CHFCF2), as well as their five closed-shell precursors (1-HC2F4I, 2-HC2F4I, 2-HC2F4Br, 1-HC3F6I, 2-HC3F6Br). Attachment to the HFC radicals is always fairly inefficient (between 0.1% and 10% of the Vogt-Wannier capture rate), but generally faster than attachment to analogous perfluorinated carbon radicals. The primary products in all cases are HF-loss to yield C(n)F(m-1)(-)anions, with only a minor branching to F-product. In all cases the temperature dependences are weak. Attachment to the precursor halocarbons is near the capture rate with a slight negative temperature dependence in all cases except for 2-HC2F4Br, which is similar to 10% efficient at 300 K and becomes more efficient, approaching the capture rate at higher temperatures. All attachment kinetics are successfully reproduced using a kinetic modeling approach. Reaction of the HFC radicals with Ar+ proceeds at or near the calculated collisional rate coefficient in all cases, yielding a wide variety of product ions. (C) 2015 AIP Publishing LLC.
C1 [Wiens, Justin P.; Shuman, Nicholas S.; Miller, Thomas M.; Viggiano, Albert A.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Wiens, JP (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
FU Air Force Office of Scientific Research [AFOSR-2303EP]; National
Research Council
FX This work was supported by the Air Force Office of Scientific Research
(No. AFOSR-2303EP). J.P.W. is supported by the National Research Council
Research Associateship Program.
NR 42
TC 1
Z9 1
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD AUG 21
PY 2015
VL 143
IS 7
AR 074309
DI 10.1063/1.4928691
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CQ2OJ
UT WOS:000360440400031
PM 26298136
ER
PT J
AU Sablon, K
Li, Y
Vagidov, N
Mitin, V
Little, JW
Hier, H
Sergeev, A
AF Sablon, K.
Li, Y.
Vagidov, N.
Mitin, V.
Little, J. W.
Hier, H.
Sergeev, A.
TI GaAs quantum dot solar cell under concentrated radiation
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BUILT-IN CHARGE; EFFICIENCY; SUNS
AB Effects of concentrated solar radiation on photovoltaic performance are investigated in well-developed GaAs quantum dot (QD) solar cells with 1-Sun efficiencies of 18%-19%. In these devices, the conversion processes are enhanced by nanoscale potential barriers and/or AlGaAs atomically thin barriers around QDs, which prevent photoelectron capture to QDs. Under concentrated radiation, the short circuit current increases proportionally to the concentration and the open circuit voltage shows the logarithmic increase. In the range up to hundred Suns, the contributions of QDs to the photocurrent are proportional to the light concentration. The ideality factors of 1.1-1.3 found from the VOC-Sun characteristics demonstrate effective suppression of recombination processes in barrier-separated QDs. The conversion efficiency shows the wide maximum in the range of 40-90 Suns and reaches 21.6%. Detailed analysis of I-V-Sun characteristics shows that at low intensities, the series resistance decreases inversely proportional to the concentration and, at similar to 40 Suns, reaches the plateau determined mainly by the front contact resistance. Improvement of contact resistance would increase efficiency to above 24% at thousand Suns. (C) 2015 AIP Publishing LLC.
C1 [Sablon, K.; Little, J. W.; Hier, H.; Sergeev, A.] US Army Res Lab, Adelphi, MD 20783 USA.
[Li, Y.; Vagidov, N.; Mitin, V.; Sergeev, A.] SUNY Buffalo, EE Dept, Buffalo, NY 14260 USA.
[Vagidov, N.] US Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Sablon, K (reprint author), US Army Res Lab, Adelphi, MD 20783 USA.
FU ARL; NSF [ECS-1236459]; NRC Research Associateship Program
FX The work of K.S., J.W.L., and H.H. was supported by ARL and research at
UB was supported by NSF (ECS-1236459). A.S. and N.V. gratefully
acknowledge support from NRC Research Associateship Program. The authors
are grateful to S. Oktyabrsky, D. Wilt, and M. Yakimov for valuable
discussions.
NR 30
TC 2
Z9 2
U1 6
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD AUG 17
PY 2015
VL 107
IS 7
AR 073901
DI 10.1063/1.4928669
PG 5
WC Physics, Applied
SC Physics
GA CQ1WI
UT WOS:000360390500065
ER
PT J
AU Kaspi, R
Lu, CA
Newell, TC
Yang, C
Luong, S
AF Kaspi, Ron
Lu, Chunte A.
Newell, Tim C.
Yang, Chi
Luong, Sanh
TI GaSb-based > 3 mu m laser diodes grown with up to 2.4% compressive
strain in the quantum wells using strain compensation
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Molecular beam epitaxy; Antimonides; Semiconducting III-V materials;
Laser diodes
ID OPERATION; ROOM
AB We describe the growth of GaSb-based diode lasers with quinary AlInGaAsSb alloy waveguide/barriers and highly strained InGaAsSb type-I quantum wells, designed to emit at similar to 3.2 mu m at room temperature. To increase the compressive strain in the QWs above the pseudomorphic limit, we employ strain compensation in which the lower portion of the quinary alloy waveguide is slightly arsenic-rich as compared to the lattice-matched composition. Using this scheme, we fabricated a set of laser devices with incrementally increasing compressive strain in the quantum wells. With compressive strain reaching as high as similar to 2.4%, the device performance corroborates the notion that adding compressive strain in the quantum wells helps improve hole confinement and suppresses carrier leakage during operation near room temperature. Published by Elsevier B.V.
C1 [Kaspi, Ron; Lu, Chunte A.; Newell, Tim C.; Yang, Chi; Luong, Sanh] AFRL RDLTD, Directed Energy Directorate, Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Kaspi, R (reprint author), AFRL RDLTD, Directed Energy Directorate, Air Force Res Lab, Albuquerque, NM 87117 USA.
EM ron.kaspi@us.af.mil
FU Air Force Office of Scientific Research (AFOSR)
FX The authors are grateful to the Air Force Office of Scientific Research
(AFOSR) for providing funding for this project.
NR 11
TC 4
Z9 4
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD AUG 15
PY 2015
VL 424
BP 24
EP 27
DI 10.1016/j.jcrysgro.2015.04.043
PG 4
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA CK0RL
UT WOS:000355912400005
ER
PT J
AU Pinchak, M
Ombrello, T
Carter, C
Gutmark, E
Katta, V
AF Pinchak, Matthew
Ombrello, Timothy
Carter, Campbell
Gutmark, Ephraim
Katta, Viswanath
TI The effects of hydrodynamic stretch on the flame propagation enhancement
of ethylene by addition of ozone
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL
AND ENGINEERING SCIENCES
LA English
DT Article
DE plasma; combustion; ozone; flame speed enhancement; Hencken flame;
sub-atmospheric pressure
ID JET DIFFUSION FLAMES; NONEQUILIBRIUM PLASMA; LASER EXCITATION;
COMBUSTION; IGNITION; DISCHARGE; MIXTURES; METHANE; FLOW; STABILIZATION
AB The effect of O-3 on C2H4/synthetic-air flame propagation at sub-atmospheric pressure was investigated through detailed experiments and simulations. A Hencken burner provided an ideal platform to interrogate flame speed enhancement, producing a steady, laminar, nearly one-dimensional, minimally curved, weakly stretched, and nearly adiabatic flame that could be accurately compared with simulations. The experimental results showed enhancement of up to 7.5% in flame speed for 11 000ppm of O-3 at stoichiometric conditions. Significantly, the axial stretch rate was also found to affect enhancement. Comparison of the flames for a given burner exit velocity resulted in the enhancement increasing almost 9% over the range of axial stretch rates that was investigated. Two-dimensional simulations agreed well with the experiments in terms of flame speed, as well as the trends of enhancement. Rate of production analysis showed that the primary pathway for O-3 consumption was through reaction with H, leading to early heat release and increased production of OH. Higher flame stretch rates resulted in increased flux through the H + O-3 reaction to provide increased enhancement, due to the thinning of the flame that accompanies higher stretch, and thus results in decreased distance for the H to diffuse before reacting with O-3.
C1 [Pinchak, Matthew; Gutmark, Ephraim] Univ Cincinnati, Dept Aerosp Engn, Cincinnati, OH USA.
[Ombrello, Timothy; Carter, Campbell] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Katta, Viswanath] Innovat Sci Solut Inc, Dayton, OH USA.
RP Ombrello, T (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.ombrello.1@us.af.mil
OI Gutmark, Ephraim/0000-0001-7816-4257
FU Dayton Area Graduate Studies Institute
FX This work was supported by the Dayton Area Graduate Studies Institute.
NR 36
TC 0
Z9 0
U1 2
U2 9
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-503X
EI 1471-2962
J9 PHILOS T R SOC A
JI Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci.
PD AUG 13
PY 2015
VL 373
IS 2048
AR 20140339
DI 10.1098/rsta.2014.0339
PG 17
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CM7TW
UT WOS:000357900400009
ER
PT J
AU Nath, J
Modak, S
Rezadad, I
Panjwani, D
Rezaie, F
Cleary, JW
Peale, RE
AF Nath, Janardan
Modak, Sushrut
Rezadad, Imen
Panjwani, Deep
Rezaie, Farnood
Cleary, Justin W.
Peale, Robert E.
TI Far-infrared absorber based on standing-wave resonances in
metal-dielectric-metal cavity
SO OPTICS EXPRESS
LA English
DT Article
ID TERAHERTZ METAMATERIAL ABSORBER; OPTICAL-CONSTANTS; HOLE ARRAYS; BAND;
REGIME; TRANSMISSION; DESIGN; MODEL
AB Thin-film resonant absorbers for the far-IR spectral range were fabricated, characterized, and modeled. The 3-mu m-thick structure comprises a periodic surface array of metal squares, a dielectric spacer and a metallic ground plane. Up to 95% absorption for the fundamental band at similar to 53.5 mu m wavelength (5.6 THz) is achieved experimentally. Absorption bands are independent of the structure period and only weakly dependent on polarization and incident angle. The results are well explained in terms of standing-wave resonances within individual metal-dielectric-metal cavities. The structure has application as a wavelength selective coating for far-IR bolometers. (C) 2015 Optical Society of America
C1 [Nath, Janardan; Rezadad, Imen; Panjwani, Deep; Rezaie, Farnood; Peale, Robert E.] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
[Modak, Sushrut] Univ Cent Florida, Coll Opt & Photon CREOL, Orlando, FL 32816 USA.
[Cleary, Justin W.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Peale, RE (reprint author), Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
EM Robert.Peale@ucf.edu
RI Panjwani, Deep/A-9250-2017
OI Panjwani, Deep/0000-0002-8351-6138
FU Florida High Technology Corridor program [I-4]
FX This work was supported in part by an award from the Florida High
Technology Corridor (I-4) program.
NR 43
TC 7
Z9 7
U1 10
U2 37
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD AUG 10
PY 2015
VL 23
IS 16
BP 20366
EP 20380
DI 10.1364/OE.23.020366
PG 15
WC Optics
SC Optics
GA CR0TP
UT WOS:000361036400016
PM 26367892
ER
PT J
AU Auslender, I
Barmashenko, B
Rosenwaks, S
Zhdanov, B
Rotondaro, M
Knize, RJ
AF Auslender, Ilya
Barmashenko, Boris
Rosenwaks, Salman
Zhdanov, Boris
Rotondaro, Matthew
Knize, Randall J.
TI Modeling of pulsed K diode pumped alkali laser: Analysis of the
experimental results
SO OPTICS EXPRESS
LA English
DT Article
AB A simple optical model of K DPAL, where Gaussian spatial shapes of the pump and laser intensities in any cross section of the beams are assumed, is reported. The model, applied to the recently reported highly efficient static, pulsed K DPAL [Zhdanov et al, Optics Express 22, 17266 (2014)], shows good agreement between the calculated and measured dependence of the laser power on the incident pump power. In particular, the model reproduces the observed threshold pump power, 22 W (corresponding to pump intensity of 4 kW/cm(2)), which is much higher than that predicted by the standard semi-analytical models of the DPAL. The reason for the large values of the threshold power is that the volume occupied by the excited K atoms contributing to the spontaneous emission is much larger than the volumes of the pump and laser beams in the laser cell, resulting in very large energy losses due to the spontaneous emission. To reduce the adverse effect of the high threshold power, high pump power is needed, and therefore gas flow with high gas velocity to avoid heating the gas has to be applied. Thus, for obtaining high power, highly efficient K DPAL, subsonic or supersonic flowing-gas device is needed. (C) 2015 Optical Society of America
C1 [Auslender, Ilya; Barmashenko, Boris; Rosenwaks, Salman] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel.
[Zhdanov, Boris; Rotondaro, Matthew; Knize, Randall J.] US Air Force Acad, Laser & Opt Res Ctr, Usaf Acad, CO 80840 USA.
RP Barmashenko, B (reprint author), Ben Gurion Univ Negev, Dept Phys, Ben Gurion Blvd 1, IL-84105 Beer Sheva, Israel.
EM barmash@bgu.ac.il
FU High Energy Laser Joint Technology Office (HEL JTO); European Office of
Aerospace Research and Development (EOARD) [FA8655-13-1-3072]
FX Effort sponsored by the High Energy Laser Joint Technology Office (HEL
JTO) and the European Office of Aerospace Research and Development
(EOARD) under grant FA8655-13-1-3072.
NR 17
TC 5
Z9 5
U1 0
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD AUG 10
PY 2015
VL 23
IS 16
BP 20986
EP 20996
DI 10.1364/OE.23.020986
PG 11
WC Optics
SC Optics
GA CR0TP
UT WOS:000361036400075
PM 26367951
ER
PT J
AU Gumbs, G
Iurov, A
Huang, DH
Pan, W
AF Gumbs, Godfrey
Iurov, Andrii
Huang, Danhong
Pan, Wei
TI Tunable surface plasmon instability leading to emission of radiation
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID INFRARED TRANSMISSION SPECTRA; LATERALLY CONFINED 2D-PLASMA; SILICON
INVERSION LAYERS; QUANTUM-CASCADE LASERS; 2-DIMENSIONAL PLASMA;
INTERCALATED GRAPHITE; DIELECTRIC FUNCTION; GRAPHENE; SYSTEMS; WIRES
AB We propose a new approach for energy conversion from a dc electric field to tunable terahertz emission based on hybrid semiconductors by combining two-dimensional (2D) crystalline layers and a thick conducting material with possible applications for chemical analysis, security scanning, medical (single-molecule) imaging, and telecommunications. The hybrid nano-structure may consist of a single or pair of sheets of graphene, sificene, or a 2D electron gas. When an electric current is passed through a 2D layer, we discover that two low-energy plasmon branches exhibit a characteristic loop in their dispersion before they merge into an unstable region beyond a critical wave vector q(c). This finite q(c) gives rise to a wavenumber cutoff in the emission dispersion of the surface plasmon induced instability and emission of radiation (spiler). However, there is no instability for a single driven layer far from the conductor, and the instability of an isolated pair of 2D layers occurs without a wavenumber cutoff. The wavenumber cutoff is found to depend on the conductor electron density, layer separation, distances of layers from the conductor surface, and the driving-current strength. (C) 2015 AIP Publishing LLC,
C1 [Gumbs, Godfrey; Iurov, Andrii] CUNY Hunter Coll, Dept Phys & Astron, 695 Pk Ave, New York, NY 10065 USA.
[Gumbs, Godfrey] Donostia Int Phys Ctr, San Sebastian 20018, Basque Country, Spain.
[Iurov, Andrii] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
[Huang, Danhong] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Pan, Wei] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Iurov, A (reprint author), CUNY Hunter Coll, Dept Phys & Astron, 695 Pk Ave, New York, NY 10065 USA.
EM aiurov@chtm.unm.edu
RI DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014
FU AFRL [FA 9453-13-1-0291]; Air Force Office of Scientific Research
(AFOSR); U.S. Department of Energy, Office of Science, Basic Energy
Sciences, Materials Sciences and Engineering Division
FX This research was supported by Contract No. FA 9453-13-1-0291 of AFRL.
D.H. thank the Air Force Office of Scientific Research (AFOSR) for its
support. W.P. was supported by the U.S. Department of Energy, Office of
Science, Basic Energy Sciences, Materials Sciences and Engineering
Division. We thank Oleksiy Roslyak and Antonios Balassis for helpful
discussions.
NR 53
TC 7
Z9 7
U1 4
U2 34
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD AUG 7
PY 2015
VL 118
IS 5
AR 054303
DI 10.1063/1.4927101
PG 10
WC Physics, Applied
SC Physics
GA CO7XK
UT WOS:000359376700027
ER
PT J
AU Voss, JD
Leon, JC
Dhurandhar, NV
Robb, FT
AF Voss, Jameson D.
Leon, Juan C.
Dhurandhar, Nikhil V.
Robb, Frank T.
TI Pawnobiome: manipulation of the hologenome within one host generation
and beyond
SO FRONTIERS IN MICROBIOLOGY
LA English
DT Editorial Material
DE evolution; microbiome; hologenome; microbiota; pawnobe
ID HUMAN GUT MICROBIOTA; INTESTINAL MICROBIOTA; ADENOVIRUS INFECTION;
INSULIN-RESISTANCE; ESCHERICHIA-COLI; GNOTOBIOTIC MICE; HUMAN-DISEASE;
EVOLUTION; OBESITY; ADIPOSITY
C1 [Voss, Jameson D.; Leon, Juan C.] US Air Force, Sch Aerosp Med, Epidemiol Consult Serv, Wright Patterson AFB, OH 45433 USA.
[Dhurandhar, Nikhil V.] Texas Tech Univ, Dept Nutr Sci, Lubbock, TX 79409 USA.
[Robb, Frank T.] Univ Maryland, Dept Microbiol & Immunol, Baltimore, MD 21201 USA.
RP Voss, JD (reprint author), US Air Force, Sch Aerosp Med, Epidemiol Consult Serv, Wright Patterson AFB, OH 45433 USA.
EM jameson.voss@us.af.mil
OI Robb, Frank/0000-0001-5833-6496
NR 57
TC 3
Z9 3
U1 1
U2 15
PU FRONTIERS MEDIA SA
PI LAUSANNE
PA PO BOX 110, EPFL INNOVATION PARK, BUILDING I, LAUSANNE, 1015,
SWITZERLAND
SN 1664-302X
J9 FRONT MICROBIOL
JI Front. Microbiol.
PD AUG 6
PY 2015
VL 6
AR 697
DI 10.3389/fmicb.2015.00697
PG 5
WC Microbiology
SC Microbiology
GA CO9HO
UT WOS:000359485800001
PM 26300848
ER
PT J
AU Bachmatiuk, A
Boeckl, J
Smith, H
Ibrahim, I
Gemming, T
Oswald, S
Kazmierczak, W
Makarov, D
Schmidt, OG
Eckert, J
Fu, L
Rummeli, MH
AF Bachmatiuk, Alicja
Boeckl, John
Smith, Howard
Ibrahim, Imad
Gemming, Thomas
Oswald, Steffen
Kazmierczak, Wojciech
Makarov, Denys
Schmidt, Oliver G.
Eckert, Juergen
Fu, Lei
Rummeli, Mark H.
TI Vertical Graphene Growth from Amorphous Carbon Films Using Oxidizing
Gases
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; SILICON; TRANSFORMATION; NANOWALLS; NITRIDE;
HEAT
AB Amorphous carbon thin films are technologically important materials that range in use from the semiconductor industry to corrosion-resistant films. Their conversion to crystalline graphene layers has long been pursued; however, typiCally this requires excessively high temperatures. Thus, crystallization routes which require reduced temperatures are important. Moreover, the ability to crystallize amorphous catbon at reduced, teinpetatures without a catalyst could pave the way for practical graphene synthesis for device fabrication without the need for transfer or post-transfer gate deposition. To this end we demonstrate a practical and facile method to crystallize deposited amorphous Carbon films to high,quality graphene layers at reduced annealing temperatures by introducing oxidizing gases during the process. The reactive gases react with regions of higher strain (energy) in the syStel-n and accelerate the graphitization process by minimizing -criss-cross-linkages and accelerating C-C bond rearrangement at defects. In other words, the movement of crystallite boundaries is accelerated along the carbon hexagon planes by removing obstacles for Crystallite coalescence.
C1 [Bachmatiuk, Alicja] Polish Acad Sci, Ctr Polymer & Carbon Mat, PL-41819 Zabrze, Poland.
[Bachmatiuk, Alicja; Ibrahim, Imad; Gemming, Thomas; Oswald, Steffen; Makarov, Denys; Schmidt, Oliver G.; Eckert, Juergen] IFW Dresden, D-01171 Dresden, Germany.
[Boeckl, John; Smith, Howard] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Smith, Howard] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Ibrahim, Imad; Gemming, Thomas; Eckert, Juergen] Tech Univ Dresden, Ctr Adv Elect Dresden, D-01062 Dresden, Germany.
[Kazmierczak, Wojciech] Labsoft Krzysztof Herman, PL-02828 Warsaw, Poland.
[Kazmierczak, Wojciech] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany.
[Fu, Lei] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.
[Rummeli, Mark H.] Inst for Basic Sci Korea, IBS Ctr Integrated Nanostruct Phys, Taejon 305701, South Korea.
[Rummeli, Mark H.] Sungkyunkwan Univ, Dept Phys, Dept Energy Sci, Suwon 440746, South Korea.
RP Rummeli, MH (reprint author), Inst for Basic Sci Korea, IBS Ctr Integrated Nanostruct Phys, Taejon 305701, South Korea.
EM m.ruemmeli@ifw-dresden.de
RI Makarov, Denys/G-1025-2011; Lei, Fu/B-8826-2008;
OI Lei, Fu/0000-0002-8730-1847; Rummeli, Mark Hermann/0000-0003-3736-6439
FU Institute of Basic Sciences, Korea; Sino-German Center for Research
Promotion [GZ 871]; Foundation for Polish Science [HOMING
PLUS/2013-7/2]; German Excellence Initiative via the Cluster of
Excellence "Center for Advancing Electronics Dresden" (CfAED) [EXC1056]
FX The research was supported by the Institute of Basic Sciences, Korea,
and the Sino-German Center for Research Promotion (Grants GZ 871). All
are gratefully acknowledged. A.B. thanks the Foundation for Polish
Science for the financial support within the frames of the Homing Plus
Programme (Grant agreement HOMING PLUS/2013-7/2). I.I. thanks the German
Excellence Initiative via the Cluster of Excellence EXC1056 "Center for
Advancing Electronics Dresden" (CfAED). We also thank S. Avdoshenko for
discussion and input to the underlying mechanisms.
NR 35
TC 3
Z9 3
U1 7
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD AUG 6
PY 2015
VL 119
IS 31
BP 17965
EP 17970
DI 10.1021/acs.jpcc.5b05167
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA CO7IG
UT WOS:000359332200052
ER
PT J
AU Bjaalie, L
Verma, A
Himmetoglu, B
Janotti, A
Raghavan, S
Protasenko, V
Steenbergen, EH
Jena, D
Stemmer, S
Van de Walle, CG
AF Bjaalie, L.
Verma, A.
Himmetoglu, B.
Janotti, A.
Raghavan, S.
Protasenko, V.
Steenbergen, E. H.
Jena, D.
Stemmer, S.
Van de Walle, C. G.
TI Determination of the Mott-Hubbard gap in GdTiO3
SO PHYSICAL REVIEW B
LA English
DT Article
ID RTIO3 PEROVSKITES; HYBRID; PSEUDOPOTENTIALS; CHEMISTRY; SYSTEMS; SOLIDS;
GD; SM; ND
AB The band gaps of rare-earth titanates are commonly reported to be 0.2-0.7 eV. These values are based on optical reflectivity measurements, from which the onset of optical absorption is derived. Here we report experimental and theoretical results on GdTiO3 (GTO) indicating that the gap is significantly larger. Photoluminescence (PL) measurements show a strong peak near 1.8 eV, consistent with an observed onset in PL excitation (PLE) at about the same energy. First-principles calculations, based either on density-functional theory (DFT) with a hybrid functional or on DFT+U, consistently show that the gap is close to 2 eV. We also propose an interpretation of the previously reported optical absorption spectra. Given the similarities in electronic structure between the rare-earth titanates, our results for GTO have repercussions for the other members of the series. The results also affect the design of complex-oxide heterostructures involving these materials.
C1 [Bjaalie, L.; Himmetoglu, B.; Janotti, A.; Raghavan, S.; Stemmer, S.; Van de Walle, C. G.] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
[Verma, A.; Protasenko, V.; Jena, D.] Univ Notre Dame, Dept Elect Engn, South Bend, IN USA.
[Steenbergen, E. H.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Bjaalie, L (reprint author), Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
RI Stemmer, Susanne/H-6555-2011
OI Stemmer, Susanne/0000-0002-3142-4696
FU MURI program of the Office of Naval Research [N00014-12-1-0976]; NSF
MRSEC program [DMR-1121053]; MRL (NSF MRSEC) [DMR-1121053]; NSF
[CNS-0960316, ACI-1053575]
FX The authors would like to thank A. Alkauskas for useful discussions.
This work was supported by the MURI program of the Office of Naval
Research, Grant No. N00014-12-1-0976 and by the NSF MRSEC program
(DMR-1121053). Computational resources were provided by the Center for
Scientific Computing at the CNSI and MRL (an NSF MRSEC, DMR-1121053)
(NSF CNS-0960316), and by the Extreme Science and Engineering Discovery
Environment (XSEDE), supported by NSF (ACI-1053575).
NR 32
TC 5
Z9 5
U1 3
U2 39
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD AUG 6
PY 2015
VL 92
IS 8
AR 085111
DI 10.1103/PhysRevB.92.085111
PG 5
WC Physics, Condensed Matter
SC Physics
GA CO3HY
UT WOS:000359048700006
ER
PT J
AU Jones, JG
Goldstein, JT
Smith, SR
Landis, GR
Grazulis, L
Sun, LR
Murphy, NR
Kozlowski, G
Jakubiak, R
Stutza, CE
AF Jones, John G.
Goldstein, Jonathan T.
Smith, Steven R.
Landis, Gerald R.
Grazulis, Lawrence
Sun, Lirong
Murphy, Neil R.
Kozlowski, Gregory
Jakubiak, Rachel
Stutza, Charles E.
TI Tunable stoichiometry of SiOx-BaTiOy-BOz fabricated by multitarget
pulsed laser deposition
SO JOURNAL OF NANOPHOTONICS
LA English
DT Article
DE pulsed laser deposition; tunable stoichiometry; ellipsometry;
multitarget
ID TITANATE THIN-FILMS; BARIUM-TITANATE; OPTICAL-PROPERTIES;
CRYSTALLIZATION; CHALLENGES; HISTORY; PLD
AB Oxide materials of desired stoichiometry are challenging to make in small quantities. Nanostructured thin films of multiple oxide materials were obtained by using pulsed laser deposition and multiple independent targets consisting of Si, BaTiO3, and B. Programmable stoichiometry of nanostructured thin films was achieved by synchronizing a 248-nm krypton fluoride excimer laser at an energy of 300 mJ/pulse, a galvanometer mirror system, and the three independent target materials with a background pressure of oxygen. Island growth occurred on a per pulse basis; some 500 pulses are required to deposit 1 nm of material. The number of pulses on each target was programmed with a high degree of precision. Trends in material properties were systematically identified by varying the stoichiometry of multiple nanostructured thin films and comparing the resulting measured using in situ spectroscopic ellipsometry, capacitance measurements including relative permittivity and loss, and energy dispersive spectroscopy (EDS). Films were deposited similar to 150 to 907 nm thickness, and in situ ellipsometry data were modeled to calculate thickness n and k. A representative atomic force microscopy measurement was also collected. EDS, ellipsometry, and capacitance measurements were all performed on each of the samples, with one sample having a calculated permittivity greater than 20,000 at 1 kHz. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Jones, John G.; Goldstein, Jonathan T.; Murphy, Neil R.; Jakubiak, Rachel; Stutza, Charles E.] AFRL RXAN, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Smith, Steven R.; Landis, Gerald R.; Grazulis, Lawrence] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Sun, Lirong] Gen Dynam Informat Technol, Dayton, OH 45431 USA.
[Kozlowski, Gregory] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
RP Jones, JG (reprint author), AFRL RXAN, Air Force Res Lab, Mat & Mfg Directorate, 2179 12th St, Wright Patterson AFB, OH 45433 USA.
EM john.jones.66@us.af.mil
FU Air Force Office of Scientific Research
FX The authors thank the Air Force Office of Scientific Research for
financial support. Gail Brown is thanked for spectroscopic measurements
and constructive support and advice.
NR 26
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U1 1
U2 9
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1934-2608
J9 J NANOPHOTONICS
JI J. Nanophotonics
PD AUG 5
PY 2015
VL 9
AR 093590
DI 10.1117/1.JNP.9.093590
PG 14
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA CP4EN
UT WOS:000359834900001
ER
PT J
AU Slocik, JM
Drummy, LF
Dickerson, MB
Crouse, CA
Spowart, JE
Naik, RR
AF Slocik, Joseph M.
Drummy, Lawrence F.
Dickerson, Matthew B.
Crouse, Christopher A.
Spowart, Jonathan E.
Naik, Rajesh R.
TI Bioinspired High-Performance Energetic Materials Using Heme-Containing
Crystals
SO SMALL
LA English
DT Article
DE aluminium; bioinspired materials; energetics; hemozoin; malaria
ID BETA-HEMATIN; ALUMINUM NANOPARTICLES; HEMOZOIN FORMATION; COMBUSTION;
REACTIVITY; PIGMENT; NANOCOMPOSITES; NANOMATERIALS; NANOALUMINUM;
OXIDATION
C1 [Slocik, Joseph M.; Drummy, Lawrence F.; Dickerson, Matthew B.; Spowart, Jonathan E.; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Crouse, Christopher A.] Air Force Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
RP Naik, RR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM rajesh.naik@us.af.mil
FU Air Force Office Scientific Research
FX This work was funded by the Air Force Office Scientific Research. The
authors thank Dr. Alexander Khramov (UES, Inc.) for assistance with
high-speed video images of combustion events and Mr. Nicholas Garvin for
technical assistance with reconstructing electron tomography data.
NR 47
TC 0
Z9 0
U1 6
U2 23
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1613-6810
EI 1613-6829
J9 SMALL
JI Small
PD AUG 5
PY 2015
VL 11
IS 29
BP 3539
EP 3544
DI 10.1002/smll.201403659
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA CO2ZI
UT WOS:000359025300004
PM 25940859
ER
PT J
AU Rino, CL
Groves, KM
Carrano, CS
Gunter, JH
Parris, RT
AF Rino, Charles L.
Groves, Keith M.
Carrano, Charles S.
Gunter, Jacob H.
Parris, Richard T.
TI Digital signal processing for ionospheric propagation diagnostics
SO RADIO SCIENCE
LA English
DT Article
AB For decades, analog beacon satellite receivers have generated multifrequency narrowband complex data streams that could be processed directly to extract total electron content (TEC) and scintillation diagnostics. With the advent of software-defined radio, modern digital receivers generate baseband complex data streams that require intermediate processing to extract the narrowband modulation imparted to the signal by ionospheric structure. This paper develops and demonstrates a processing algorithm for digital beacon satellite data that will extract TEC and scintillation components. For algorithm evaluation, a simulator was developed to generate noise-limited multifrequency complex digital signal realizations with representative orbital dynamics and propagation disturbances. A frequency-tracking procedure is used to capture the slowly changing frequency component. Dynamic demodulation against the low-frequency estimate captures the scintillation. The low-frequency reference can be used directly for dual-frequency TEC estimation.
C1 [Rino, Charles L.; Groves, Keith M.; Carrano, Charles S.] Boston Coll, Inst Sci Res, Boston, MA 02467 USA.
[Gunter, Jacob H.] Utah State Univ, Dept Elect & Comp Engn, Logan, UT 84322 USA.
[Parris, Richard T.] Air Force Res Lab, Ionospher Hazards Specificat & Forecast, Albuquerque, NM USA.
RP Rino, CL (reprint author), Boston Coll, Inst Sci Res, Boston, MA 02467 USA.
EM crino@comcast.net
FU Air Force contract [FA87-18-09-C-0041]
FX This work was sponsored by the Air Force contract FA87-18-09-C-0041. All
of the results shown in the paper are simulations. No actual data were
used.
NR 12
TC 0
Z9 0
U1 1
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
EI 1944-799X
J9 RADIO SCI
JI Radio Sci.
PD AUG
PY 2015
VL 50
IS 8
BP 837
EP 851
DI 10.1002/2014RS005625
PG 15
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA CW6PG
UT WOS:000365119100009
ER
PT J
AU Sutton, EK
Thayer, JP
Wang, WB
Solomon, SC
Liu, XJ
Foster, BT
AF Sutton, Eric K.
Thayer, Jeffrey P.
Wang, Wenbin
Solomon, Stanley C.
Liu, Xianjing
Foster, Benjamin T.
TI A self-consistent model of helium in the thermosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE winter helium bulge; thermospheric composition; thermosphere model;
exospheric transport
ID GENERAL-CIRCULATION MODEL; EARTHS UPPER-ATMOSPHERE; DIURNAL-VARIATIONS;
LATERAL TRANSPORT; EMPIRICAL-MODEL; AURORAL MODEL; SOLAR MINIMUM;
CONSTITUENTS; IONOSPHERE; DYNAMICS
AB We have found that consideration of neutral helium as a major species leads to a more complete physics-based modeling description of the Earth's upper thermosphere. An augmented version of the composition equation employed by the Thermosphere-Ionosphere-Electrodynamic General Circulation Model (TIE-GCM) is presented, enabling the inclusion of helium as the fourth major neutral constituent. Exospheric transport acting above the upper boundary of the model is considered, further improving the local time and latitudinal distributions of helium. The new model successfully simulates a previously observed phenomenon known as the winter helium bulge, yielding behavior very similar to that of an empirical model based on mass spectrometer observations. This inclusion has direct consequence on the study of atmospheric drag for low-Earth-orbiting satellites, as well as potential implications on exospheric and topside ionospheric research.
C1 [Sutton, Eric K.] Air Force Res Lab, Space Environm Branch, Albuquerque, NM 87113 USA.
[Thayer, Jeffrey P.; Liu, Xianjing] Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA.
[Wang, Wenbin; Solomon, Stanley C.; Foster, Benjamin T.] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA.
RP Sutton, EK (reprint author), Air Force Res Lab, Space Environm Branch, Albuquerque, NM 87113 USA.
EM eric.k.sutton@gmail.com
RI Solomon, Stanley/J-4847-2012; Wang, Wenbin/G-2596-2013; THAYER, JEFFREY
P./B-7264-2016; Sutton, Eric/A-1574-2016
OI Solomon, Stanley/0000-0002-5291-3034; Wang, Wenbin/0000-0002-6287-4542;
THAYER, JEFFREY P./0000-0001-7127-8251; Sutton, Eric/0000-0003-1424-7189
FU AFOSR [LRIR 13RV09COR]; NASA [NNX10AQ52G, NNX10AE62G, NNX13AE15G,
NNX10AQ59G]; National Science Foundation
FX The authors gratefully acknowledge E.C. Ridley, whose detailed notes
regarding the solution of helium as a minor species are maintained by A.
Maute of NCAR/HAO. Model simulations and data used throughout this
article are freely available by request from E.S. This work is supported
by AFOSR grant LRIR 13RV09COR to the Air Force Research Laboratory, NASA
grants NNX10AQ52G and NNX10AE62G to the University of Colorado, and NASA
grants NNX13AE15G and NNX10AQ59G to the National Center for Atmospheric
Research. NCAR is sponsored by the National Science Foundation.
NR 64
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U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD AUG
PY 2015
VL 120
IS 8
BP 6884
EP 6900
DI 10.1002/2015JA021223
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CS5NP
UT WOS:000362125300062
ER
PT J
AU Lien, W
Roberts, HW
Plate, JA
Vandewalle, KS
Hill, TJ
Chu, TMG
AF Lien, Wen
Roberts, Howard W.
Plate, Jeffrey A.
Vandewalle, Kraig S.
Hill, Thomas J.
Chu, Tien-Min G.
TI Microstructural evolution and physical behavior of a lithium disilicate
glass-ceramic
SO DENTAL MATERIALS
LA English
DT Article
DE IPS e.max (R) CAD; Lithium disilicate; Lithium metasilicate;
Glass-ceramic; Nanoindentation; Microstructure; Phase transformation;
Heating schedule; Temperature threshold; Differential scanning
calorimetry; Nucleation; Crystallization
ID X-RAY-DIFFRACTION; FLEXURAL STRENGTH; FRACTURE-TOUGHNESS;
CRYSTALLIZATION; NUCLEATION; LEUCITE; RESISTANCE; KINETICS; HARDNESS;
FAILURE
AB Background. Elucidating the microstructural responses of the lithium disilicate system like the popular IPS e.max (R) CAD (LS2), made specifically for computer-aided design and computer-aided manufacturing (CAD-CAM), as a temperature-dependent system unravels new ways to enhance material properties and performance.
Objective. To study the effect of various thermal processing on the crystallization kinetics, crystallite microstructure, and strength of LS2.
Methods. The control group of the LS2 samples was heated using the standard manufacturer heating-schedule. Two experimental groups were tested: (1) an extended temperature range (750-840 degrees C vs. 820-840 degrees C) at the segment of 30 degrees C/min heating rate, and (2) a protracted holding time (14 min vs. 7 min) at the isothermal temperature of 840 degrees C. Five other groups of different heating schedules with lower-targeted temperatures were evaluated to investigate the microstructural changes. For each group, the crystalline phases and morphologies were measured by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. Differential scanning calorimeter (DSC) was used to determine the activation energy of LS2 under non-isothermal conditions. A universal testing machine was used to measure 3-point flexural strength and fracture toughness, and elastic modulus and hardness were measured by a nanoindenter. A one-way ANOVA/Tukey was performed per property (alpha = 0.05).
Results. DSC, XRD, and SEM revealed three distinct microstructures during LS2 crystallization. Significant differences were found between the control group, the two aforementioned experimental groups, and the five lower-targeted-temperature groups per property (p < 0.05). The activation energy for lithium disilicate growth was 667 (+/- 29.0) kJ/mol.
Conclusions. Groups with the extended temperature range (750-840 degrees C) and protracted holding time (820-840 degrees C H14) produced significantly higher elastic-modulus and hardness properties than the control group but showed similar flexural-strength and fracture-toughness properties with the control group. In general, rapid growth of lithium disilicates occurred only when maximum formation of lithium metasilicates had ended. Published by Elsevier Ltd on behalf of Academy of Dental Materials.
C1 [Lien, Wen] US Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Lien, Wen; Plate, Jeffrey A.; Chu, Tien-Min G.] Indiana Univ, Sch Dent, Indianapolis, IN USA.
[Roberts, Howard W.] US Air Force, Keesler AFB, MS USA.
[Vandewalle, Kraig S.] US Air Force, Joint Base San Antonio, TX USA.
[Hill, Thomas J.] Ivoclar Vivadent, Amherst, NY USA.
RP Lien, W (reprint author), US Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM wenlien2003@yahoo.com
FU Dental Master's Thesis Award Grant from the Delta Dental Foundation
FX The authors would like to thank Dr. Angela Campbell and Dr. Gregory
Ehlert at the United States Air Force Research Laboratory and Dr. Tao
You and Dr. Todd Lincoln at the United States Army Institute of Surgical
Research for their help and support. Also, special thanks goes to Dr.
Shashikant Singhal at Ivoclar Vivadent (Schann, Liechtenstein) for
supplying the IPS e.max (R) CAD blocs. This research was partially
funded by the Dental Master's Thesis Award Grant from the Delta Dental
Foundation.
NR 45
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U1 5
U2 27
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0109-5641
EI 1879-0097
J9 DENT MATER
JI Dent. Mater.
PD AUG
PY 2015
VL 31
IS 8
BP 928
EP 940
DI 10.1016/j.dental.2015.05.003
PG 13
WC Dentistry, Oral Surgery & Medicine; Materials Science, Biomaterials
SC Dentistry, Oral Surgery & Medicine; Materials Science
GA CS1QM
UT WOS:000361842600011
PM 26076831
ER
PT J
AU Wu, JB
Liou, JH
Shu, CY
Patel, Y
Menon, R
Santucci, C
Iacono, ST
Smith, DW
Novak, BM
AF Wu, Jingbo
Liou, Jau-Hung
Shu, Charles Y.
Patel, Yash
Menon, Remya
Santucci, Cara
Iacono, Scott T.
Smith, Dennis W., Jr.
Novak, Bruce M.
TI Facile method towards functionalization of partially fluorinated
polyarylethers via sequential post-polymerization modification
SO REACTIVE & FUNCTIONAL POLYMERS
LA English
DT Article
DE Fluoropolymers; Post-functionalization; Polymer synthesis;
Thermoplastic; Advanced materials
ID TRANSFER RADICAL POLYMERIZATION; THIOL-ENE CLICK; POSTPOLYMERIZATION
MODIFICATION; BLOCK-COPOLYMERS; ETHER POLYMERS; CROSS-LINKING; MODULAR
SYNTHESIS; FUEL-CELL; MEMBRANES; ACID
AB A novel partially fluorinated arylene vinylene ether (FAVE) polymer containing ester groups was synthesized, which was used to prepare three reactive FAVE polymers containing carboxylic acid groups, alcohol groups, and acid chloride groups, respectively. Post-polymerization modifications of the FAVE polymer's carboxylic acid groups (via a DCC coupling procedure with the desired alcohol), alcohol groups (via DCC coupling or an acid chloride esterification procedure with the desired carboxylic acid or acid chloride), and acid chloride groups (via an optimized nucleophilic substitution reaction with the desired alcohol or amine) were successfully performed. Several examples have been successfully prepared to demonstrate the versatility of these developed modification methods. FAVE polymers have been prepared with NHS active ester groups, Disperse Red 1 chromophores, benzyl bromide groups, aryl trifluorovinyl ether groups, ATRP initiator groups, vinyl groups, propargyl groups, Disperse Orange 3 chromophores, and benzaldehyde groups. In most cases, analytical data are consistent with a quantitative conversion of the reactive or functional groups. It is demonstrated that no degradation of the FAVE polymer matrix occurs after multistep post-polymerization modification reactions. Published by Elsevier B.V.
C1 [Wu, Jingbo; Liou, Jau-Hung; Shu, Charles Y.; Santucci, Cara; Smith, Dennis W., Jr.; Novak, Bruce M.] Univ Texas Dallas, Dept Chem, Richardson, TX 75080 USA.
[Wu, Jingbo; Liou, Jau-Hung; Shu, Charles Y.; Santucci, Cara; Smith, Dennis W., Jr.; Novak, Bruce M.] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, Richardson, TX 75080 USA.
[Patel, Yash] Princeton Univ, Princeton, NJ 08544 USA.
[Menon, Remya] Greenhill Sch, Addison, TX 75001 USA.
[Iacono, Scott T.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
[Iacono, Scott T.] US Air Force Acad, Chem Res Ctr, Colorado Springs, CO 80840 USA.
RP Wu, JB (reprint author), Univ Texas Dallas, Dept Chem, Richardson, TX 75080 USA.
EM wjbsioc2013@gmail.com; scott.iacono@usafa.edu
RI Wu, Jingbo/E-6305-2017
FU Intel Corporation; Welch Foundation [AT-0041]; National Science
Foundation through Center for Energy Harvesting Materials and Systems
(NSF-I/UCRC) [1035024]; NMR facility of chemistry department (NSF)
[CHE-1126177]; University of Texas at Dallas; Alan G. MacDiarmid
NanoTech Institute
FX The authors wish to thank the Intel Corporation, the Welch Foundation
(Grant AT-0041), the Alan G. MacDiarmid NanoTech Institute, the National
Science Foundation through the Center for Energy Harvesting Materials
and Systems (NSF-I/UCRC, Grant 1035024), the NMR facility of chemistry
department (NSF, Grant CHE-1126177) and the University of Texas at
Dallas for their support.
NR 61
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U1 4
U2 36
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1381-5148
EI 1873-166X
J9 REACT FUNCT POLYM
JI React. Funct. Polym.
PD AUG
PY 2015
VL 93
BP 38
EP 46
DI 10.1016/j.reactfunctpolym.2015.05.010
PG 9
WC Chemistry, Applied; Engineering, Chemical; Polymer Science
SC Chemistry; Engineering; Polymer Science
GA CQ8OY
UT WOS:000360869200006
ER
PT J
AU Harris, JR
Jensen, KL
Shiffler, DA
AF Harris, J. R.
Jensen, K. L.
Shiffler, D. A.
TI Dependence of optimal spacing on applied field in ungated field emitter
arrays
SO AIP ADVANCES
LA English
DT Article
ID CARBON NANOTUBES; VACUUM MICROELECTRONICS; MICROWAVE-AMPLIFIERS;
EMISSION PROPERTIES; CATHODES; FILMS; CONES
AB In ungated field emitter arrays, the field enhancement factor beta of each emitter tip is reduced below the value it would have in isolation due to the presence of adjacent emitters, an effect known as shielding or screening. Reducing the distance b between emitters increases the density of emission sites, but also reduces the emission per site, leading to the existence of an optimal spacing that maximizes the array current. Most researchers have identified that this optimal spacing is comparable to the emitter height h, although there is disagreement about the exact optimization. Here, we develop a procedure to determine the dependence of this optimal spacing on the applied electric field. It is shown that the nature of this dependence is governed by the shape of the beta(b) curve, and that for typical curves, the optimal value of the emitter spacing b decreases as the applied field increases. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Harris, J. R.] US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
[Jensen, K. L.] Naval Res Lab, Washington, DC 20375 USA.
[Shiffler, D. A.] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Harris, JR (reprint author), US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
OI Jensen, Kevin/0000-0001-8644-1680
FU Office of Naval Research Reserve Component Joint ST Focus Area; Air
Force Office of Scientific Research
FX The authors gratefully acknowledge the support they have received from
the Office of Naval Research Reserve Component Joint S&T Focus Area
(JRH) and from the Air Force Office of Scientific Research (KLJ),
without which this work would not have been possible.
NR 35
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U1 0
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD AUG
PY 2015
VL 5
IS 8
AR 087182
DI 10.1063/1.4929983
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CQ5OW
UT WOS:000360655900091
ER
PT J
AU Fendel, P
Ganguly, BN
Bletzinger, P
AF Fendel, Peter
Ganguly, Biswa N.
Bletzinger, Peter
TI Measurement and modeling of electric field and space-charge
distributions in obstructed helium discharge
SO PHYSICS OF PLASMAS
LA English
DT Article
ID GLOW-DISCHARGE; LOW-PRESSURE; BREAKDOWN
AB Axial and radial variations of electric field have been measured in dielectric shielded 0.025m diameter parallel plate electrode with 0.0065m gap for 1.6 mA, 2260V helium dc discharge at 1.75 Torr. The axial and radial electric field profiles have been measured from the Stark splitting of 2(1)S -> 11 P-1 transition through collision induced fluorescence from 4(3)D -> 2(3)P. The electric field values showed a strong radial variation peaking to 500 kV/m near the cathode radial boundary, and decreasing to about 100 kV/m near the anode edge, suggesting the formation of an obstructed discharge for this low nd condition, where n is the gas density and d is the gap distance. The off-axis Stark spectra showed that the electric field vector deviates from normal to the cathode surface which permits longer path electron trajectories in the inter-electrode gap. Also, the on-axis electric field gradient was very small and off-axis electric field gradient was large indicating a radially non-uniform current density. In order to obtain information about the space charge distribution in this obstructed discharge, it was modeled using the 2-d axisymmetric Poisson solver with the COMSOL finite element modeling program. The best fit to the measured electric field distribution was obtained with a space charge variation of rho(r) = rho(0)(r/r(0))(3), where rho(r) is the local space charge density, rho(0) = 6 x 10(-3) Coulomb/m(3), r is the local radial value, and r(0) is the radius of the electrode. (C) 2015 AIP Publishing LLC.
C1 [Fendel, Peter] Thorlabs, Newton, NJ 07860 USA.
[Ganguly, Biswa N.; Bletzinger, Peter] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Fendel, P (reprint author), Thorlabs, 56 Sparta Ave, Newton, NJ 07860 USA.
FU Air Force Office of Scientific Research
FX We wish to thank Dr. Alan Garscadden for his comments on this
manuscript. This work was supported by funding provided by the Air Force
Office of Scientific Research (Dr. Jason Marshall, Program Manager).
NR 28
TC 1
Z9 1
U1 2
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2015
VL 22
IS 8
AR 083503
DI 10.1063/1.4928114
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA CQ5MD
UT WOS:000360647600087
ER
PT J
AU Simon, DH
Lau, YY
Greening, G
Wong, P
Hoff, BW
Gilgenbach, RM
AF Simon, D. H.
Lau, Y. Y.
Greening, G.
Wong, P.
Hoff, B. W.
Gilgenbach, R. M.
TI Stability of Brillouin flow in planar, conventional, and inverted
magnetrons
SO PHYSICS OF PLASMAS
LA English
DT Article
ID NONNEUTRAL ELECTRON FLOW; EQUILIBRIUM
AB The Brillouin flow is the prevalent flow in crossed-field devices. We systematically study its stability in the conventional, planar, and inverted magnetron geometry. To investigate the intrinsic negative mass effect in Brillouin flow, we consider electrostatic modes in a nonrelativistic, smooth bore magnetron. We found that the Brillouin flow in the inverted magnetron is more unstable than that in a planar magnetron, which in turn is more unstable than that in the conventional magnetron. Thus, oscillations in the inverted magnetron may startup faster than the conventional magnetron. This result is consistent with simulations, and with the negative mass property in the inverted magnetron configuration. Inclusion of relativistic effects and electromagnetic effects does not qualitatively change these conclusions. (C) 2015 AIP Publishing LLC.
C1 [Simon, D. H.; Lau, Y. Y.; Greening, G.; Wong, P.; Gilgenbach, R. M.] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
[Hoff, B. W.] Kirtland AFB, Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Simon, DH (reprint author), Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
RI Simon, David/L-8446-2016
OI Simon, David/0000-0001-8666-995X
FU Air Force Office of Scientific Research [FA9550-10-1-0104,
FA9550-15-1-0097]; Office of Naval Research Award [N00014-13-1-0566];
L-3 Communications Electron Device Division
FX This work was supported by Air Force Office of Scientific Research Award
Nos. FA9550-10-1-0104 and FA9550-15-1-0097, Office of Naval Research
Award No. N00014-13-1-0566, and L-3 Communications Electron Device
Division.
NR 15
TC 3
Z9 3
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD AUG
PY 2015
VL 22
IS 8
AR 082104
DI 10.1063/1.4927798
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA CQ5MD
UT WOS:000360647600008
ER
PT J
AU Melko, JJ
Ard, SG
Shuman, NS
Pedder, RE
Taormina, CR
Viggiano, AA
AF Melko, Joshua J.
Ard, Shaun G.
Shuman, Nicholas S.
Pedder, Randall E.
Taormina, Christopher R.
Viggiano, Albert A.
TI Coupling an electrospray source and a solids probe/chemical ionization
source to a selected ion flow tube apparatus
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID TEMPERATURE-DEPENDENT KINETICS; MASS-SPECTROMETRY; ENERGY; REACTIVITY;
CHEMISTRY; FEO+; PERIODICITIES; EXCHANGE; DENSITY; FE+
AB A new ion source region has been constructed and attached to a variable temperature selected ion flow tube. The source features the capabilities of electron impact, chemical ionization, a solids probe, and electrospray ionization. The performance of the instrument is demonstrated through a series of reactions from ions created in each of the new source regions. The chemical ionization source is able to create H3O+, but not as efficiently as similar sources with larger apertures. The ability of this source to support a solids probe, however, greatly expands our capabilities. A variety of rhenium cations and dications are created from the solids probe in sufficient abundance to study in the flow tube. The reaction of Re+ with O-2 proceeds with a rate constant that agrees with the literature measurements, while the reaction of Re-2(2+) is found to charge transfer with O-2 at about 60% of the collision rate; we have also performed calculations that support the charge transfer pathway. The electrospray source is used to create Ba+, which is reacted with N2O to create BaO+, and we find a rate constant that agrees with the literature. (C) 2015 AIP Publishing LLC.
C1 [Melko, Joshua J.; Ard, Shaun G.; Shuman, Nicholas S.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Pedder, Randall E.; Taormina, Christopher R.] Ardara Technol LP, Ardara, PA 15615 USA.
RP Viggiano, AA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
OI Melko, Joshua/0000-0002-4717-2198
FU Air Force Office of Scientific Research [AFOSR-2303EP]; Institute for
Scientific Research at Boston College
FX We are grateful for the support of the Air Force Office of Scientific
Research under Project No. AFOSR-2303EP. J.J.M. and S.G.A. acknowledge
support from the Institute for Scientific Research at Boston College.
NR 27
TC 1
Z9 1
U1 2
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD AUG
PY 2015
VL 86
IS 8
AR 084101
DI 10.1063/1.4927716
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CQ5MN
UT WOS:000360648800043
PM 26329209
ER
PT J
AU Zhdanov, BV
Venus, G
Smirnov, V
Glebov, L
Knize, RJ
AF Zhdanov, B. V.
Venus, G.
Smirnov, V.
Glebov, L.
Knize, R. J.
TI Continuous wave Cs diode pumped alkali laser pumped by single emitter
narrowband laser diode
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID VOLUME BRAGG GRATINGS; CESIUM VAPOR LASER
AB This paper presents results of cooperative efforts on development of a continuous wave Cs diode pumped alkali laser with moderate output power, which can be considered as a prototype of the commercial device. The developed system operates at 895 nm with output power about 4 W and slope efficiency 28%. Measured turn on time of this system from the standby mode is about a minute. (C) 2015 AIP Publishing LLC.
C1 [Zhdanov, B. V.; Knize, R. J.] US Air Force Acad, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
[Venus, G.; Glebov, L.] Univ Cent Florida, CREOL, Coll Opt & Photon, Orlando, FL 32816 USA.
[Smirnov, V.] OptiGrate Corp, Oviedo, FL 32765 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Ste 2A31, Colorado Springs, CO 80840 USA.
FU High Energy Lasers Joint Technology Office (HEL JTO)
FX We acknowledge support of the High Energy Lasers Joint Technology Office
(HEL JTO) who funded this research project.
NR 15
TC 1
Z9 1
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD AUG
PY 2015
VL 86
IS 8
AR 083104
DI 10.1063/1.4926883
PG 4
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CQ5MN
UT WOS:000360648800005
PM 26329171
ER
PT J
AU Gibson, GR
Campbell, JB
Zipper, CE
AF Gibson, Glen R.
Campbell, James B.
Zipper, Carl E.
TI Sociopolitical influences on cropland area change in Iraq, 2001-2012
SO APPLIED GEOGRAPHY
LA English
DT Article
DE Agriculture; Cultivation; Food imports; Land use/land cover change;
MODIS
ID LANDSAT TM IMAGES; KURDISTAN; MARSHES
AB Iraq has experienced significant agricultural land use changes throughout its history, including recent changes initiated by the 2003 US-led military invasion, the end of United Nations' economic sanctions and the onset of overt domestic conflict. Conflict and sociopolitical forces are important drivers of land use/land cover change and often have disproportionate impacts on agricultural systems. However, there has been little research to investigate recent changes in agricultural land use/land cover in Iraq over the recent tumultuous period that has included war and the transition of its political system from a dictatorship to an emerging but beleaguered democracy. Our objectives were to (1) determine if cropland area in Iraq changed significantly between 2001 and 2012, (2) identify regional patterns of cropland area change, and (3) identify sociopolitical forces driving those changes. We used MODIS Land Cover Product yearly data to quantify the amount of land cover dedicated to croplands. We regressed cropland area (ha) on time (2001, 2002, 2003,...) and years with drought influence (yes, no). The results revealed significant changes in cropland area for Iraq as a whole, with cropland area decreasing over 30,000 ha per year. Regionally, there were significant decreases in the Kurdish Autonomous Region and central Iraq, and initial increases in the southern marshlands followed by decreases related to drought. Published by Elsevier Ltd.
C1 [Gibson, Glen R.] US Air Force Acad, Dept Econ & Geosci, Usafa, CO 80840 USA.
[Campbell, James B.] Virginia Tech, Dept Geog, Blacksburg, VA 24061 USA.
[Zipper, Carl E.] Virginia Tech, Dept Crop & Soil Environm Sci, Blacksburg, VA 24061 USA.
RP Gibson, GR (reprint author), US Air Force Acad, Dept Econ & Geosci, 2354 Fairchild Dr,Suite 6K118, Usafa, CO 80840 USA.
EM ggibson@vt.edu; jayhawk@vt.edu; czip@vt.edu
NR 45
TC 1
Z9 2
U1 0
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0143-6228
EI 1873-7730
J9 APPL GEOGR
JI Appl. Geogr.
PD AUG
PY 2015
VL 62
BP 339
EP 346
DI 10.1016/j.apgeog.2015.05.007
PG 8
WC Geography
SC Geography
GA CQ2HD
UT WOS:000360419800032
ER
PT J
AU Miller, JD
Dedic, CE
Meyer, TR
AF Miller, Joseph D.
Dedic, Chloe E.
Meyer, Terrence R.
TI Vibrational femtosecond/picosecond coherent anti-Stokes Raman scattering
with enhanced temperature sensitivity for flame thermometry from 300 to
2400K
SO JOURNAL OF RAMAN SPECTROSCOPY
LA English
DT Article; Proceedings Paper
CT Joint Conference of the 13th European Conference on Nonlinear Optical
Spectroscopy (ECNOS) / 33rd European CARS Workshop (ECW)
CY MAY 11-14, 2014
CL Dole, FRANCE
DE coherent anti-Stokes Raman scattering; ultrafast spectroscopy;
combustion diagnostics; thermometry
ID GAS-PHASE THERMOMETRY; SPECTROSCOPY; CARS; SUPPRESSION; MOLECULES;
PROBE; KHZ
AB Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (fs/ps CARS) of N-2 has recently been demonstrated for gas-phase thermometry in reacting flows, enabling frequency-domain detection at high repetition rates with excellent chemical specificity and independence from the effects of collisions and nonresonant background. In this work, we overcome the limited sensitivity of vibrational fs/ps CARS thermometry of N-2 below 1200K by spectrally resolving J-dependent rovibrational coherence revivals that occur 32ps after initial excitation. The N-2 rovibrational coherence is excited using broadband, 100-fs pump and Stokes pulses and probed as a function of time using a narrowband, 5.8-ps probe pulse (bandwidth of 2.5cm(-1)). The rovibrational features exhibit sufficient temperature sensitivity below 1200K for accurate thermometry using a simple, time-dependent phenomenological model. Specifically, three distinct spectral features at a single probe delay of 32.5ps are analyzed, corresponding to rovibrational revivals with mean rotational quantum numbers of < J >=3.5, 14, and 28. Good agreement is found between simulated and measured fs/ps CARS spectra in an adiabatic flat-flame burner from 298 to 2400K. Copyright (c) 2015 John Wiley & Sons, Ltd.
C1 [Miller, Joseph D.] Aerosp Syst Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Miller, Joseph D.; Dedic, Chloe E.; Meyer, Terrence R.] Iowa State Univ, Dept Mech Engn, Ames, IA USA.
RP Miller, JD (reprint author), Aerosp Syst Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM joseph.miller.35@us.af.mil
FU Air Force Office of Scientific Research; National Science Foundation
Early Career program [CBET-1056006]; National Research Council Research
Associate Program; National Science Foundation Graduate Fellowship
Program
FX Funding was provided, in part, by the Air Force Office of Scientific
Research (Dr Chiping Li, Program Manager) and the National Science
Foundation Early Career program under Contract No. CBET-1056006. The
authors also thank Dr J. Gord of the Air Force Research Laboratory and
Drs H. Stauffer and S. Roy of Spectral Energies, LLC for the ongoing
technical discussions. J. Miller acknowledges the funding from the
National Research Council Research Associate Program. C. Dedic was
supported by the National Science Foundation Graduate Fellowship
Program.
NR 34
TC 8
Z9 8
U1 3
U2 14
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0377-0486
EI 1097-4555
J9 J RAMAN SPECTROSC
JI J. Raman Spectrosc.
PD AUG
PY 2015
VL 46
IS 8
SI SI
BP 702
EP 707
DI 10.1002/jrs.4725
PG 6
WC Spectroscopy
SC Spectroscopy
GA CQ0WV
UT WOS:000360319400006
ER
PT J
AU Youn, J
Vegiraju, S
Emery, JD
Leever, BJ
Kewalramani, S
Lou, SJ
Zhang, SM
Prabakaran, K
Ezhumalai, Y
Kim, C
Huang, PY
Stern, C
Chang, WC
Bedzyk, MJ
Chen, LX
Chen, MC
Facchetti, A
Marks, TJ
AF Youn, Jangdae
Vegiraju, Sureshraju
Emery, Jonathan D.
Leever, Benjamin J.
Kewalramani, Sumit
Lou, Silvia J.
Zhang, Shiming
Prabakaran, Kumaresan
Ezhumalai, Yamuna
Kim, Choongik
Huang, Peng-Yi
Stern, Charlotte
Chang, Wen-Chung
Bedzyk, Michael J.
Chen, Lin X.
Chen, Ming-Chou
Facchetti, Antonio
Marks, Tobin J.
TI Diperfluorophenyl Fused Thiophene Semiconductors for n-Type Organic Thin
Film Transistors (OTFTs)
SO ADVANCED ELECTRONIC MATERIALS
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; POLYMER BLEND SEMICONDUCTORS; SELF-ASSEMBLED
MONOLAYERS; HIGH-PERFORMANCE; HIGH-MOBILITY; CRYSTAL-STRUCTURE;
CHARGE-TRANSPORT; ELECTRICAL PERFORMANCES; CHANNEL SEMICONDUCTORS;
NAPHTHALENE-DIIMIDE
AB Three new fused thiophene semiconductors, end-capped with diperfluorophenylthien-2-yl (DFPT) groups (DFPT-thieno[2', 3': 4,5]thieno[3,2-b] thieno[2,3-d]thiophene (TTA), DFPT-dithieno[2,3-b : 3', 2'-d]thiophenes (DTT), and DFPT-thieno[ 3,2-b]thiophene (TT)), are synthesized and characterized in organic thin film transistors. Good environmental stability of the newly developed materials is demonstrated via thermal analysis as well as degradation tests under white light. The molecular structures of all three perfluorophenylthien-2-yl end-functionalized derivatives are determined by single crystal X-ray diffraction. DFPT-TTA and DFPT-TT exhibit good n-type TFT performance, with mobilities up to 0.43 and 0.33 cm(2) V-1 s(-1), respectively. These are among the best performing n-type materials of all fused thiophenes reported to date. The best thin film transistor device performance is achieved via an n-octadecyltrichlorosilane dielectric surface treatment on the thermally grown Si/SiO2 substrates prior to vapor-phase semiconductor deposition. Within the DFPT series, carrier mobility magnitudes depend strongly on the semiconductor growth conditions and the gate dielectric surface treatment.
C1 [Youn, Jangdae; Lou, Silvia J.; Zhang, Shiming; Stern, Charlotte; Chen, Lin X.; Facchetti, Antonio; Marks, Tobin J.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Youn, Jangdae; Lou, Silvia J.; Zhang, Shiming; Stern, Charlotte; Chen, Lin X.; Facchetti, Antonio; Marks, Tobin J.] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA.
[Vegiraju, Sureshraju; Prabakaran, Kumaresan; Ezhumalai, Yamuna; Huang, Peng-Yi; Chang, Wen-Chung; Chen, Ming-Chou] Natl Cent Univ, Dept Chem, Jhongli 320, Taiwan.
[Emery, Jonathan D.; Leever, Benjamin J.; Kewalramani, Sumit; Bedzyk, Michael J.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Leever, Benjamin J.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kim, Choongik] Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South Korea.
RP Kim, C (reprint author), Sogang Univ, Dept Chem & Biomol Engn, 1 Shinsoo Dong, Seoul 121742, South Korea.
EM choongik@sogang.ac.kr; bedzyk@northwestern.edu; l-chen@northwestern.edu;
mcchen@ncu.edu.tw; a-facchetti@northwestern.edu;
t-marks@northwestern.edu
RI Bedzyk, Michael/B-7503-2009
FU NSF MRSEC program at the Materials Research Center of Northwestern U.
[DMR-1121262]; AFOSR [FA9550-08-1-0331]; National Science Council,
Taiwan, Republic of China [NSC102-2923-M-008-004-MY2, MOST
103-2113-M-008-004]; Basic Science Research Program through National
Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future
Planning [NRF-2014R1A1A1A05002158]; Center for Advanced Soft Electronics
under Global Frontier Research Program of the Ministry of Science, ICT
and Future Planning [2013M3A6A5073175]; U.S. DOE, Office of Science,
Office of Basic Energy Sciences [DE-AC02-06CH11357]
FX J.Y. and S.V. contributed equally to this work. This research was
supported by the NSF MRSEC program (Grant No. DMR-1121262) at the
Materials Research Center of Northwestern U., by AFOSR Grant No.
FA9550-08-1-0331, by the National Science Council, Taiwan, Republic of
China (Grant Nos. NSC102-2923-M-008-004-MY2 and MOST
103-2113-M-008-004), and by Basic Science Research Program through the
National Research Foundation of Korea (NRF) funded by the Ministry of
Science, ICT and Future Planning (NRF-2014R1A1A1A05002158) and by the
Center for Advanced Soft Electronics under the Global Frontier Research
Program of the Ministry of Science, ICT and Future Planning (Code No.
2013M3A6A5073175). Use of the Advanced Photon Source, 33BM-C, was
supported by the U.S. DOE, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-06CH11357. This work made use of
the J. B. Cohen X-ray Diffraction Facility.
NR 94
TC 5
Z9 5
U1 6
U2 48
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2199-160X
J9 ADV ELECTRON MATER
JI Adv. Electron. Mater.
PD AUG
PY 2015
VL 1
IS 8
AR 1500098
DI 10.1002/aelm.201500098
PG 16
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CP4SK
UT WOS:000359872700007
ER
PT J
AU Allen, KW
Farahi, N
Li, YC
Limberopoulos, NI
Walker, DE
Urbas, AM
Liberman, V
Astratov, VN
AF Allen, Kenneth W.
Farahi, Navid
Li, Yangcheng
Limberopoulos, Nicholaos I.
Walker, Dennis E., Jr.
Urbas, Augustine M.
Liberman, Vladimir
Astratov, Vasily N.
TI Super-resolution microscopy by movable thin-films with embedded
microspheres: Resolution analysis
SO ANNALEN DER PHYSIK
LA English
DT Article
ID DIELECTRIC MICROSPHERE; CONFOCAL MICROSCOPE; PHOTONIC JETS; LIGHT;
FABRICATION; NANOSCOPE; NANOJET; GOLD; PDMS
AB Microsphere-assisted imaging has emerged as an extraordinary simple technique of obtaining optical super-resolution. This work addresses two central problems in developing this technology: i) methodology of the resolution measurements and ii) limited field-of-view provided by each sphere. It is suggested that a standard method of resolution analysis in far-field microscopy based on convolution with the point-spread function can be extended into the super-resolution area. This allows developing a unified approach to resolution measurements, which can be used for comparing results obtained by different techniques. To develop the surface scanning functionality, the high-index (n approximate to 2) barium titanate glass microspheres were embedded in polydimethylsiloxane (PDMS) thin-films. It is shown that such films adhere to the surface of nanoplasmonic structures so that the tips of embedded spheres experience the objects' optical near-fields. Based on rigorous criteria, the resolution approximate to/6-/7 (where is the illumination wavelength) is demonstrated for arrays of Au dimers and bowties. Such films can be translated along the surface of investigated samples after liquid lubrication. It is shown that just after lubrication the resolution is diffraction limited, however the super-resolution gradually recovers as the lubricant evaporates.
C1 [Allen, Kenneth W.; Farahi, Navid; Li, Yangcheng; Astratov, Vasily N.] Univ N Carolina, Dept Phys & Opt Sci, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA.
[Allen, Kenneth W.; Farahi, Navid; Limberopoulos, Nicholaos I.; Walker, Dennis E., Jr.; Astratov, Vasily N.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Urbas, Augustine M.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Liberman, Vladimir] MIT, Lincoln Lab, Lexington, MA 02420 USA.
RP Astratov, VN (reprint author), Univ N Carolina, Dept Phys & Opt Sci, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA.
EM kenneth.w.allen.jr@gmail.com; astratov@uncc.edu
FU U.S. Army Research Office [W911NF-09-1-0450]; DURIP [W911NF-11-1-0406,
W911NF-12-1-0538]; Center for Metamaterials, an NSF I/U CRC [1068050];
Air Force Research Laboratory (AFRL/RYD, AFRL/RXD) through the AMMTIAC;
Alion Science and Technology; UES, Inc.; Department of the Air Force
under Air Force Contract [FA8721-05-C-0002]
FX The authors gratefully acknowledge support from U.S. Army Research
Office through Dr. J. T. Prater under Contract No. W911NF-09-1-0450 and
DURIP W911NF-11-1-0406 and W911NF-12-1-0538. This work was also
supported by Center for Metamaterials, an NSF I/U CRC, Award No.
1068050. Also, this work was sponsored by the Air Force Research
Laboratory (AFRL/RYD, AFRL/RXD) through the AMMTIAC contract with Alion
Science and Technology and the MCF II contract with UES, Inc. The
Lincoln Laboratory portion of this work was sponsored by the Department
of the Air Force under Air Force Contract #FA8721-05-C-0002. Opinions,
interpretations, recommendations and conclusions are those of the
authors and are not necessarily endorsed by the United States
Government.
NR 44
TC 18
Z9 18
U1 11
U2 35
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0003-3804
EI 1521-3889
J9 ANN PHYS-BERLIN
JI Ann. Phys.-Berlin
PD AUG
PY 2015
VL 527
IS 7-8
BP 513
EP 522
DI 10.1002/andp.201500194
PG 10
WC Physics, Multidisciplinary
SC Physics
GA CP5GW
UT WOS:000359910300009
ER
PT J
AU Grier, B
Figliola, R
Alyanak, E
Camberos, J
AF Grier, Benjamin
Figliola, Richard
Alyanak, Edward
Camberos, Jose
TI Discontinuous Solutions Using the Method of Manufactured Solutions on
Finite Volume Solvers
SO AIAA JOURNAL
LA English
DT Article
ID COMPUTATIONAL FLUID-DYNAMICS; RIEMANN SOLVER; SOURCE TERMS; CONVERGENCE;
SCHEMES
AB When applying the method of manufactured solutions on computational fluid dynamic software, it is a requirement that all solutions be continuous on the computational domain. This stipulation is limiting for the verification and validation of numerical solutions where discontinuities are frequent. In an effort to adapt the standard method of manufactured solutions procedure, we propose a piecewise approach for modeling solutions with discontinuities. Linearly and quadratically exact transformations are used for determining the exact solutions and source terms for cells split by discontinuities. Upwind manufactured solutions are initialized and a least squares fit is used to solve for solutions downwind of the discontinuity such that the Rankine-Hugoniot conditions are satisfied. The codes used throughout this research are finite volume, 1st and 2nd order, inviscid schemes combined with uniform structured grids. This study shows that a modified method of manufactured solutions procedure can be performed with fully general discontinuous solutions yielding 1st order convergences typically associated with shocks.
C1 [Grier, Benjamin; Figliola, Richard] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA.
[Alyanak, Edward; Camberos, Jose] US Air Force Res Lab, Multidisciplinary Sci & Technol Ctr, Wright Patterson AFB, OH 45433 USA.
RP Figliola, R (reprint author), Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA.
EM bengrier@gmail.com; fgliola@clemson.edu; Edward.Alyanak@wpafb.af.mil;
Jose.camberos@wpafb.af.mil
NR 23
TC 0
Z9 0
U1 0
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD AUG
PY 2015
VL 53
IS 8
BP 2369
EP 2378
DI 10.2514/1.J053725
PG 10
WC Engineering, Aerospace
SC Engineering
GA CO7BX
UT WOS:000359313600023
ER
PT J
AU Schuren, JC
Shade, PA
Bernier, JV
Li, SF
Blank, B
Lind, J
Kenesei, P
Lienert, U
Suter, RM
Turner, TJ
Dimiduk, DM
Almer, J
AF Schuren, Jay C.
Shade, Paul A.
Bernier, Joel V.
Li, Shiu Fai
Blank, Basil
Lind, Jonathan
Kenesei, Peter
Lienert, Ulrich
Suter, Robert M.
Turner, Todd J.
Dimiduk, Dennis M.
Almer, Jonathan
TI New opportunities for quantitative tracking of polycrystal responses in
three dimensions
SO CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
LA English
DT Review
DE HEDM; Synchrotron radiation; X-ray diffraction; Polycrystalline
materials; Microstructure; Plastic deformation; 3D characterization
ID X-RAY-DIFFRACTION; LATTICE STRAIN-MEASUREMENTS; PLASTIC-DEFORMATION;
SINGLE-CRYSTAL; ORIENTATION; MICROSCOPY; FRACTURE; FATIGUE; UNCERTAINTY;
TOMOGRAPHY
AB An important advance in understanding the mechanics of solids over the last 50 years has been development of a suite of models that describe the performance of engineering materials while accounting for internal fluctuations and anisotropies (ex., anisotropic response of grains) over a hierarchy of length scales. Only limited engineering adoption of these tools has occurred, however, because of the lack of measured material responses at the length scales where the models are cast. Here, we demonstrate an integrated experimental capability utilizing high energy X-rays that provides an in situ, micrometer-scale probe for tracking evolving microstructure and intergranular stresses during quasi-static mechanical testing. We present first-of-a-kind results that show an unexpected evolution of the intergranular stresses in a titanium alloy undergoing creep deformation. We also discuss the expectation of new discoveries regarding the underlying mechanisms of strength and damage resistance afforded by this rapidly developing X-ray microscopy technique. Published by Elsevier Ltd.
C1 [Schuren, Jay C.; Shade, Paul A.; Turner, Todd J.; Dimiduk, Dennis M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Bernier, Joel V.; Li, Shiu Fai; Lind, Jonathan] Lawrence Livermore Natl Lab, Engn Directorate, Livermore, CA 94550 USA.
[Blank, Basil] PulseRay, Beaver Dams, NY 14812 USA.
[Kenesei, Peter; Almer, Jonathan] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Lienert, Ulrich] DESY Petra III, Hamburg, Germany.
[Lind, Jonathan; Suter, Robert M.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
RP Shade, PA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM paul.shade.1@us.af.mil
RI Shade, Paul/H-6459-2011; Suter, Robert/P-2541-2014
OI Suter, Robert/0000-0002-0651-0437
FU Materials & Manufacturing Directorate of the U.S. Air Force Research
Laboratory; U.S. DOE [DEAC02-06CH11357]
FX The authors would like to thank Dr. Adam Pilchak (Air Force Research
Laboratory) for providing the Ti-7Al material examined in this study,
Dr. Chris Woodward (Air Force Research Laboratory) for help securing the
computational resources required for the data reduction, Dr. Andrew
Rosenberger (Air Force Research Laboratory) for providing reference
mechanical test data, Professor Armand Beaudoin (University of Illinois)
and Professor Matt Miller (Cornell University) for useful discussions,
and Ali Mashayekhi (Advanced Photon Source), Erika Benda (Advanced
Photon Source), and Kurt Goetze (Advanced Photon Source) for help with
the experimental setup. The authors acknowledge support from the
Materials & Manufacturing Directorate of the U.S. Air Force Research
Laboratory. Use of the Advanced Photon Source, an Office of Science User
Facility operated for the U.S. Department of Energy (DOE) Office of
Science by Argonne National Laboratory, was supported by the U.S. DOE
under Contract No. DEAC02-06CH11357.
NR 49
TC 14
Z9 14
U1 8
U2 27
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-0286
EI 1879-0348
J9 CURR OPIN SOLID ST M
JI Curr. Opin. Solid State Mat. Sci.
PD AUG
PY 2015
VL 19
IS 4
SI SI
BP 235
EP 244
DI 10.1016/j.cossms.2014.11.003
PG 10
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA CO9MJ
UT WOS:000359499600005
ER
PT J
AU Lawrance, JE
Christodoulou, CG
Taha, MR
AF Lawrance, Julie E.
Christodoulou, Christos G.
Taha, Mahmoud Reda
TI A High-Power Microwave Zoom Antenna With Metal-Plate Lenses
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE High-power microwave zoom antenna; metal-plate lenses; parallel-plate
waveguide lenses; zoom antennas
ID CONDUCTIVITY
AB Metal-plate lens antennas were designed and constructed for a high-power microwave zoom antenna concept comprising a pyramidal horn feed antenna and two metal-plate lenses. Good agreement was found between experiment and simulation. This antenna provides true zoom capability with continuously variable collimated beam output, approximately 10% bandwidth, and very high power-handling capability. It can be designed to operate at any frequency in the range of about 100 MHz to 10 GHz. It was found that nano-modified carbon fiber composites could be used instead of metal plates in these lenses; these composites would reduce the weight of the lens significantly and would help to mitigate possible spurious TM modes induced in the lens when it is in the near-field of the feed horn antenna.
C1 [Lawrance, Julie E.] Air Force Res Lab, Albuquerque, NM 87104 USA.
[Christodoulou, Christos G.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
[Taha, Mahmoud Reda] Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA.
RP Lawrance, JE (reprint author), Air Force Res Lab, Albuquerque, NM 87104 USA.
EM christos@unm.edu; mrtaha@unm.edu
NR 20
TC 0
Z9 0
U1 2
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
EI 1558-2221
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD AUG
PY 2015
VL 63
IS 8
BP 3380
EP 3389
DI 10.1109/TAP.2015.2435037
PG 10
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CO6EY
UT WOS:000359251200006
ER
PT J
AU Blackwell, DD
Cothran, CD
Walker, DN
Tejero, EM
Gatling, GR
Enloe, CL
Amatucci, WE
AF Blackwell, David D.
Cothran, Christopher D.
Walker, David N.
Tejero, Erik M.
Gatling, George R.
Enloe, C. Lon
Amatucci, W. E.
TI Advances in Impedance Probe Applications and Design in the NRL Space
Physics Simulation Chamber
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE plasma diagnostics; plasma measurements
ID IONOSPHERIC ELECTRON-DENSITY; PLASMA RESONANCE PROBE; ENERGY-ABSORPTION;
SHEATH
AB Impedance probe measurements are made at ionospheric (F-region) plasma conditions (n(e) approximate to 10(4)-10(6) cm(-3) and lambda(D) approximate to 1-10 cm) created in the Space Physics Simulation Chamber at the Naval Research Laboratory. Measurements of probe-plasma impedance are used to provide comparative data and identify possible problems, with the goal of developing flight-capable diagnostics for sounding rocket experiments. The ability of the diagnostic technique to infer electron density and plasma potential in an ionospheric plasma is demonstrated with laboratory measurements. In addition, preliminary data from prototype instruments built in our laboratory are presented.
C1 [Blackwell, David D.; Tejero, Erik M.; Gatling, George R.; Amatucci, W. E.] US Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Cothran, Christopher D.; Walker, David N.] Sotera Def Solut Inc, Herndon, VA 20171 USA.
[Enloe, C. Lon] US Air Force Acad, Colorado Springs, CO 80920 USA.
RP Blackwell, DD (reprint author), US Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM davidb@ccs.nrl.navy.mil; christopher.cothran.ctr@nrl.navy.mil;
dave.walker.ctr@nrl.navy.mil; erik.tejero@nrl.navy.mil;
george.gatling@nrl.navy.mil; lon.enloe@usafa.edu;
bill.amatucci@nrl.navy.mil
FU Naval Research Laboratory Base Program
FX This work was supported by the Naval Research Laboratory Base Program.
NR 22
TC 0
Z9 0
U1 4
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 2015
VL 43
IS 8
SI SI
BP 2649
EP 2657
DI 10.1109/TPS.2015.2450024
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA CP0DR
UT WOS:000359546500050
ER
PT J
AU Qin, JQ
Pasko, VP
Celestin, S
Cummer, SA
McHarg, MG
Stenbaek-Nielsen, HC
AF Qin, Jianqi
Pasko, Victor P.
Celestin, Sebastien
Cummer, Steven A.
McHarg, Matthew G.
Stenbaek-Nielsen, Hans C.
TI Effects of Phosphor Persistence on High-Speed Imaging of Transient
Luminous Events
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Deconvolution; high-speed imaging; phosphor persistence; plasma
discharges; sprite streamers; transient luminous events
ID SPRITE; INTENSIFIERS; IONOSPHERE; INITIATION
AB High-speed intensified cameras are commonly used to observe and study the transient luminous events known as sprite halos and sprite streamers occurring in the Earth's upper atmosphere in association with thunderstorm activity. In such observations, the phosphor persistence in the image intensifier, depending on its characteristic decay time, might lead to a significant distortion of the optical signals recorded by those cameras. In this paper, we analyze the observational data obtained using different camera systems to discuss the effects of phosphor persistence on high-speed video observations of sprites, and introduce a deconvolution technique to effectively reduce such effects. The discussed technique could also be used to enhance the high-speed images of other transient optical phenomena in the case when the phosphor persistence has a characteristic decay time that is comparable with the temporal resolution of the cameras required to resolve the phenomena.
C1 [Qin, Jianqi; Pasko, Victor P.] Penn State Univ, Dept Elect Engn, University Pk, PA 16801 USA.
[Celestin, Sebastien] Univ Orleans, CNRS, Lab Phys & Chem Environm & Space, F-45100 Orleans, France.
[Cummer, Steven A.] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA.
[McHarg, Matthew G.] US Air Force Acad, Dept Phys, El Paso Cty, CO 80840 USA.
[Stenbaek-Nielsen, Hans C.] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA.
RP Qin, JQ (reprint author), Penn State Univ, University Pk, PA 16801 USA.
EM juq108@psu.edu; vpasko@psu.edu; sebastien.celestin@cnrs-orleans.fr;
cummer@ee.duke.edu; matthew.mcharg@usafa.edu; hnielsen@gi.alaska.edu
RI Cummer, Steven/A-6118-2008; Celestin, Sebastien/A-2202-2015; Pasko,
Victor/S-6024-2016; Qin, Jianqi/A-2509-2013
OI Cummer, Steven/0000-0002-0002-0613; Qin, Jianqi/0000-0003-2213-9305
FU National Science Foundation [AGS-1106779, AGS-1332199, ATM-1104441];
French Space Agency (CNES)
FX This work was supported by the National Science Foundation under Grant
AGS-1106779, Grant AGS-1332199, and Grant ATM-1104441. The work of S.
Celestin was supported by the French Space Agency (CNES).
NR 16
TC 0
Z9 0
U1 2
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 2015
VL 43
IS 8
SI SI
BP 2738
EP 2742
DI 10.1109/TPS.2015.2445820
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA CP0DR
UT WOS:000359546500062
ER
PT J
AU Little, BK
Emery, SB
Nittinger, JC
Fantasia, RC
Lindsay, CM
AF Little, Brian K.
Emery, Samuel B.
Nittinger, Joshua C.
Fantasia, Ryan C.
Lindsay, C. Michael
TI Physiochemical Characterization of Iodine(V) Oxide, Part 1: Hydration
Rates
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE Iodine(V) oxide; Iodine pentoxide; Hydrogen iodate; Triperiodic acid;
HI3O8; HIO3-I2O5/Iodic acid; HIO3; Energetic material; Hydration rate;
Oxidizer
ID ELASTIC NEUTRON-SCATTERING; TRICALCIUM SILICATE; ENERGETIC MATERIALS;
CRYSTALLINE I2O5; PENTOXIDE; SYSTEM; NUCLEATION; MODELS; IODATE; HIO3
AB In the first of a series of papers on the iodine(V) oxide system, the chemical and physical properties associated with iodine(V) oxide in its anhydride (I2O5) and hydrated states (HI3O8 and HIO3) are examined. The three forms of the oxide have been investigated utilizing differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD). Furthermore, the hydration rates governing the conversion of the anhydride (I2O5) to the initial hydrate (HI3O8) and later to the final hydrated state (HIO3) are reported and discussed. Results from this study suggest that the hydration mechanism for I2O5 -> HI3O8 begins with an accelerating period described as a nucleation and growth phase followed by a decelerating period that is diffusion limited. The initial rate of hydration was observed to be governed by a nucleation and growth mechanism, which was inhibited by covering the surface of the particle with an inert metal. Based on this investigation the initial rate of hydration appears to be strongly dependent on the anhydride's available surface area which facilitates nucleation and growth of HI3O8. The final step, HI3O8 -> HIO3, proceeds through an initial induction period followed by a continuous acceleratory period unlike the first hydration step.
C1 [Little, Brian K.; Emery, Samuel B.; Nittinger, Joshua C.; Fantasia, Ryan C.; Lindsay, C. Michael] US Air Force Res Lab, Energet Mat Branch, Eglin AFB, FL 32542 USA.
[Little, Brian K.; Emery, Samuel B.] Univ Dayton, Res Inst, Eglin AFB, FL 32542 USA.
[Emery, Samuel B.] Surface Warfare Ctr Indian Head, Explos Ordinance Technol Div, Indian Head, MD 20640 USA.
RP Little, BK (reprint author), US Air Force Res Lab, Energet Mat Branch, Eglin AFB, FL 32542 USA.
EM brian.little.ctr@eglin.af.mil
FU Air Force Office of Scientific Research and Program [3002NW];
[96ABW-2014-0078]
FX The authors wish to thank Prof Karen Martirosyan for preparing and
donating the anhydrous I2O5 material used in this
work. The authors would also like to acknowledge the support of Dr. Curt
Johnson and Dr. Jerry Boatz for discussions of the calculation of the
heat of formation for HI3O8. This research was
performed while B.K.L. and S.B.E. held National Research Council
Research Associateship Awards. This work was supported by research grant
3002NW from the Air Force Office of Scientific Research and Program
Officer Dr. Michael Berman. The authors would also like to acknowledge
the support of Dr. Amanda M. Schrand. Distribution A. Approved for
public release, distribution unlimited. (96ABW-2014-0078)
NR 41
TC 2
Z9 2
U1 3
U2 11
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0721-3115
EI 1521-4087
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD AUG
PY 2015
VL 40
IS 4
BP 595
EP 603
DI 10.1002/prep.201400225
PG 9
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA CO7LY
UT WOS:000359341900023
ER
PT J
AU Sahu, S
Cao, L
Meziani, MJ
Bunker, CE
Fernando, KAS
Wang, P
Sun, YP
AF Sahu, Sushant
Cao, Li
Meziani, Mohammed J.
Bunker, Christopher E.
Fernando, K. A. Shiral
Wang, Ping
Sun, Ya-Ping
TI Carbon dioxide photoconversion driven by visible-light excitation of
small carbon nanoparticles in various configurations
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID PHOTOCATALYTIC REDUCTION; ELECTROCHEMICAL REDUCTION; AQUEOUS
SUSPENSIONS; CO2 CONVERSION; QUANTUM DOTS; TIO2; PHOTOREDUCTION;
HYDROCARBONS; PHOTOLUMINESCENCE; CATALYSTS
AB In the CO2 sequestration, a desirable yet challenging option is the photocatalytic conversion with solar irradiation. While nanoscale semiconductors have been at the center of attention in the development of suitable photocatalysts for the CO2 conversion, carbon nanoparticles have recently emerged as a new class of photoactive materials for harvesting visible photons to drive photocatalytic processes. Results from this study demonstrate that aqueous suspended bare carbon nanoparticles could be excited with visible light to photocatalytically convert CO2 into formic acid, with the performance competitive to that of widely used semiconductor nanoparticles. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Sahu, Sushant; Cao, Li; Meziani, Mohammed J.; Wang, Ping; Sun, Ya-Ping] Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
[Sahu, Sushant; Cao, Li; Meziani, Mohammed J.; Wang, Ping; Sun, Ya-Ping] Clemson Univ, Lab Emerging Mat & Technol, Clemson, SC 29634 USA.
[Bunker, Christopher E.] Air Force Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
[Fernando, K. A. Shiral] Univ Dayton, Res Inst, Sensors Technol Off, Dayton, OH 45469 USA.
RP Bunker, CE (reprint author), Air Force Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
EM christopher.bunker@wpafb.af.mil; syaping@clemson.edu
OI Sahu, Sushant/0000-0001-7229-7833
FU Air Force Research Laboratory; NSF; ACS-PRF; South Carolina Space Grant
Consortium
FX This work was made possible by the support from Air Force Research
Laboratory through the nanoenergetics program. Additional supports from
NSF (Y.-P.S.) and ACS-PRF (Y.-P.S.) are also acknowledged. L.C. was a
Susan G. Komen for the Cure Postdoctoral Fellow. M.J.M was on leave from
Department of Chemistry/Physics, Northwest Missouri State University as
a participant in the research program funded by South Carolina Space
Grant Consortium.
NR 36
TC 5
Z9 5
U1 12
U2 62
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
EI 1873-4448
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD AUG 1
PY 2015
VL 634
BP 122
EP 128
DI 10.1016/j.cplett.2015.05.073
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CO4RA
UT WOS:000359147100023
ER
PT J
AU Walsh, MM
Gluck, KA
AF Walsh, Matthew M.
Gluck, Kevin A.
TI Mechanisms for Robust Cognition
SO COGNITIVE SCIENCE
LA English
DT Article
DE Robustness; System control; Redundancy; Adaptability; Cognitive systems;
Computer simulation
ID SUSTAINED ATTENTION PERFORMANCE; TOTAL SLEEP-DEPRIVATION;
CHOICE/NO-CHOICE METHOD; DECISION-MAKING; WORKING-MEMORY; MOTOR CONTROL;
NUMEROSITY JUDGMENT; STRATEGY SELECTION; FEEDBACK-CONTROL; SEMANTIC
MEMORY
AB To function well in an unpredictable environment using unreliable components, a system must have a high degree of robustness. Robustness is fundamental to biological systems and is an objective in the design of engineered systems such as airplane engines and buildings. Cognitive systems, like biological and engineered systems, exist within variable environments. This raises the question, how do cognitive systems achieve similarly high degrees of robustness? The aim of this study was to identify a set of mechanisms that enhance robustness in cognitive systems. We identify three mechanisms that enhance robustness in biological and engineered systems: system control, redundancy, and adaptability. After surveying the psychological literature for evidence of these mechanisms, we provide simulations illustrating how each contributes to robust cognition in a different psychological domain: psychomotor vigilance, semantic memory, and strategy selection. These simulations highlight features of a mathematical approach for quantifying robustness, and they provide concrete examples of mechanisms for robust cognition.
C1 [Walsh, Matthew M.; Gluck, Kevin A.] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Walsh, MM (reprint author), RHAC, HPW 711, Cognit Models & Agents Branch, 2620 Q St,Bldg 852, Wright Patterson AFB, OH 45433 USA.
EM mmw188@gmail.com
FU National Research Council; Air Force Research Laboratory's Cognitive
Models and Agents Branch; AFOSR [13RH06COR]; AFRL
FX This research was performed while the first author held a National
Research Council Research Associateship Award with the Air Force
Research Laboratory's Cognitive Models and Agents Branch. We thank AFOSR
for grant 13RH06COR to the second author. The authors thank AFRL for
supporting this research and thank members of the Robust Decision Making
Strategic Technology Team and the Cognitive Models and Agents Branch for
stimulating conversation and critical thinking on this topic. Glenn
Gunzelmann, Chris Myers, Jorge Zuniga, and three anonymous reviewers
provided constructive comments on an earlier version of this manuscript.
NR 137
TC 3
Z9 3
U1 2
U2 11
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0364-0213
EI 1551-6709
J9 COGNITIVE SCI
JI Cogn. Sci.
PD AUG
PY 2015
VL 39
IS 6
BP 1131
EP 1171
DI 10.1111/cogs.12192
PG 41
WC Psychology, Experimental
SC Psychology
GA CN7NH
UT WOS:000358620800001
PM 25352094
ER
PT J
AU Hedler, JT
AF Hedler, Jeanne T.
TI A Companion to the Antebellum Presidents, 1837-1861
SO JOURNAL OF SOUTHERN HISTORY
LA English
DT Book Review
C1 [Hedler, Jeanne T.] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Hedler, JT (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU SOUTHERN HISTORICAL ASSOC
PI ATHENS
PA UNIV GEORGIA, HISTORY DEPT, ATHENS, GA 30602 USA
SN 0022-4642
EI 2325-6893
J9 J SOUTHERN HIST
JI J. South. Hist.
PD AUG
PY 2015
VL 81
IS 3
BP 715
EP 716
PG 2
WC History
SC History
GA CO1EC
UT WOS:000358895500022
ER
PT J
AU Kim, W
Simpkins, BS
Long, JP
Zhang, BY
Hendrickson, J
Guo, JP
AF Kim, Wonkyu
Simpkins, Blake S.
Long, James P.
Zhang, Boyang
Hendrickson, Joshua
Guo, Junpeng
TI Localized and nonlocalized plasmon resonance enhanced light absorption
in metal-insulator-metal nanostructures
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID INFRARED PERFECT ABSORBER; BROAD-BAND; METAMATERIAL ABSORBER; TERAHERTZ
REGIME; GRATINGS; RESONATORS; EFFICIENT; DESIGN; FILMS; ANGLE
AB Multiple absorption bands in a metal-insulator-metal (MIM) nanostructure are comprehensively investigated in the visible and near-infrared (near-IR) regime. The MIM nanostructure consists of patterned gold squares with systematically varying size and period atop a thin aluminum nitride dielectric layer on a thick gold film. Both the transverse-electric (TE) slab-waveguide mode and the transverse-magnetic (TM) surface plasmon-polariton mode can be excited in the nanostructure. Grating coupling of the incident light into nonlocalized traveling waves is found from electromagnetic field patterns and from the linear dispersion of the absorption modes with period. A localized mode strengthens the near-IR absorption band for small square sizes, and the resonance shifts to red for large square sizes. (C) 2015 Optical Society of America
C1 [Kim, Wonkyu; Zhang, Boyang; Guo, Junpeng] Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA.
[Simpkins, Blake S.; Long, James P.] Naval Res Lab, Washington, DC 20375 USA.
[Hendrickson, Joshua] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Guo, JP (reprint author), Univ Alabama, Dept Elect & Comp Engn, 301 Sparkman Dr, Huntsville, AL 35899 USA.
EM guoj@uah.edu
FU Air Force Office of Scientific Research (AFOSR) [LRIR 15RYCOR159];
Alabama Graduate Research Scholarship Program (GRSP); National Science
Foundation (NSF) [1158862]; Office of Naval Research
FX Air Force Office of Scientific Research (AFOSR) (LRIR 15RYCOR159);
Alabama Graduate Research Scholarship Program (GRSP); National Science
Foundation (NSF) (1158862); Office of Naval Research.
NR 35
TC 3
Z9 3
U1 5
U2 37
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD AUG 1
PY 2015
VL 32
IS 8
BP 1686
EP 1692
DI 10.1364/JOSAB.32.001686
PG 7
WC Optics
SC Optics
GA CN9SB
UT WOS:000358788200020
ER
PT J
AU Carretta, TR
King, RE
AF Carretta, Thomas R.
King, Raymond E.
TI Personnel Selection Influences on Remotely Piloted Aircraft Human-System
Integration
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Review
DE remotely piloted aircraft; human-system integration; personnel selection
ID PERSONALITY; VALIDITY; FAKING
AB INTRODUCTION: Human-system integration (HSI) is a complex process used to design and develop systems that integrate human capabilities and limitations in an effective and affordable manner. Effective HSI incorporates several domains, including manpower, personnel and training, human factors, environment, safety, occupational health, habitability, survivability, logistics, intelligence, mobility, and command and control. To achieve effective HSI, the relationships among these domains must be considered. Although this integrated approach is well documented, there are many instances where it is not followed. Human factors engineers typically focus on system design with little attention to the skills, abilities, and other characteristics needed by human operators. When problems with fielded systems occur, additional training of personnel is developed and conducted. Personnel selection is seldom considered during the HSI process. Complex systems such as aviation require careful selection of the individuals who will interact with the system. Personnel selection is a two-stage process involving select-in and select-out procedures. Select-in procedures determine which candidates have the aptitude to profit from training and represent the best investment. Select-out procedures focus on medical qualification and determine who should not enter training for medical reasons. The current paper discusses the role of personnel selection in the HSI process in the context of remotely piloted aircraft systems.
C1 [Carretta, Thomas R.; King, Raymond E.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Carretta, TR (reprint author), Air Force Res Lab, 711 HPW RHCI 2210 8th St,Area B,Bldg 146,Rm 122, Wright Patterson AFB, OH 45433 USA.
EM thomas.carretta@us.af.mil
NR 33
TC 0
Z9 0
U1 0
U2 5
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD AUG
PY 2015
VL 86
IS 8
BP 736
EP 741
DI 10.3357/AMHP.4287.2015
PG 6
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA CN5LV
UT WOS:000358471700008
PM 26387898
ER
PT J
AU Cochet, AA
Cochet, AE
Francis, JM
AF Cochet, Anthony A., Jr.
Cochet, Allyson E.
Francis, James M.
TI Eosinophilic Esophagitis with Dysphagia and Food Impaction in a Young
Adult
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Article
DE eosinophilic esophagitis; dysphagia; impaction
ID CONSENSUS RECOMMENDATIONS; FOREIGN-BODIES; MANAGEMENT; DIAGNOSIS;
CHILDREN; COMPLICATIONS; RISK; DIET
AB BACKGROUND: Eosinophilic esophagitis (EoE) is an emerging esophageal disease associated with dysphagia and food impaction. Practice guidelines have only recently been developed. It affects 1/1000 individuals, predominantly young men. As this demographic represents a substantial portion of the military aviation population, aerospace medicine clinicians should be familiar with this diagnosis when evaluating dysphagia or impactions.
CASE REPORT: A 23-yr-old Caucasian man, a U.S. Air Force air traffic controller, presented to. Flight Medicine following an episode of food impaction requiring evaluation in the local emergency department.The patient reported a 5-yr history of recurrent episodes of food lodging in his throat, requiring fluid and body repositioning for resolution. Medical history was significant for eczema. Upper endoscopy revealed an abnormal esophagus with macroscopic features of EoE and biopsies were also consistent with EoE. After further work-up, the patient was diagnosed with EoE and treated. Significant symptom improvement was noted after 2 mo of therapy.
DISCUSSION: This case outlines the evaluation of food impaction as well as the diagnostic criteria for EoE, which is a disease that affects patients with demographics common to the military aviation community. As the diagnostic and treatment guidelines for EoE are relatively new, it may easily be overlooked by the primary care physician, causing a delay in subspecialist consultation, thus delaying treatment. EoE is a condition with symptoms that pose high risk to the performance of aircrew duties; therefore, flight surgeons must be familiar with the aeromedical standards that accompany this diagnosis.
C1 [Cochet, Anthony A., Jr.] 47th Med Grp, Laughlin Afb, TX 78843 USA.
[Cochet, Allyson E.; Francis, James M.] Brooke Army Med Ctr, Dept Gastroenterol, Ft Sam Houston, TX 78234 USA.
RP Cochet, AA (reprint author), 47th Med Grp, Laughlin Afb, TX 78843 USA.
EM cochetaa@gmail.com
NR 21
TC 0
Z9 0
U1 3
U2 4
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD AUG
PY 2015
VL 86
IS 8
BP 742
EP 746
DI 10.3357/AMHP.4236.2015
PG 5
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA CN5LV
UT WOS:000358471700009
PM 26387899
ER
PT J
AU Abayowa, BO
Yilmaz, A
Hardie, RC
AF Abayowa, Bernard O.
Yilmaz, Alper
Hardie, Russell C.
TI Automatic registration of optical aerial imagery to a LiDAR point cloud
for generation of city models
SO ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
LA English
DT Article
DE Scene modeling; Aerial imagery; Sensor fusion; LiDAR; 3D registration
ID LARGE-SCALE; RANGE DATA; ENVIRONMENTS; SCENES
AB This paper presents a framework for automatic registration of both the optical and 3D structural information extracted from oblique aerial imagery to a Light Detection and Ranging (LiDAR) point cloud without prior knowledge of an initial alignment. The framework employs a coarse to fine strategy in the estimation of the registration parameters. First, a dense 3D point cloud and the associated relative camera parameters are extracted from the optical aerial imagery using a state-of-the-art 3D reconstruction algorithm. Next, a digital surface model (DSM) is generated from both the LiDAR and the optical imagery-derived point clouds. Coarse registration parameters are then computed from salient features extracted from the LiDAR and optical imagery-derived DSMs. The registration parameters are further refined using the iterative closest point (ICP) algorithm to minimize global error between the registered point clouds. The novelty of the proposed approach is in the computation of salient features from the DSMs, and the selection of matching salient features using geometric invariants coupled with Normalized Cross Correlation (NCC) match validation. The feature extraction and matching process enables the automatic estimation of the coarse registration parameters required for initializing the fine registration process. The registration framework is tested on a simulated scene and aerial datasets acquired in real urban environments. Results demonstrates the robustness of the framework for registering optical and 3D structural information extracted from aerial imagery to a LiDAR point cloud, when co-existing initial registration parameters are unavailable. Published by Elsevier B.V. on behalf of International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS).
C1 [Abayowa, Bernard O.; Hardie, Russell C.] Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
[Yilmaz, Alper] Ohio State Univ, Photogrammetr Comp Vis Lab, Columbus, OH 43210 USA.
[Abayowa, Bernard O.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Abayowa, BO (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM abayowab1@udayton.edu
RI Yilmaz, Alper/B-5609-2013
OI Yilmaz, Alper/0000-0003-0755-2628
NR 43
TC 2
Z9 3
U1 6
U2 36
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-2716
EI 1872-8235
J9 ISPRS J PHOTOGRAMM
JI ISPRS-J. Photogramm. Remote Sens.
PD AUG
PY 2015
VL 106
BP 68
EP 81
DI 10.1016/j.isprsjprs.2015.05.006
PG 14
WC Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing;
Imaging Science & Photographic Technology
SC Physical Geography; Geology; Remote Sensing; Imaging Science &
Photographic Technology
GA CN8OF
UT WOS:000358699800006
ER
PT J
AU Mancuso, V
Buxa, P
Cheng, CH
Lin, D
Liou, L
Longbrake, M
Pemberton, T
AF Mancuso, Vincent
Buxa, Peter
Cheng, Chi-Hao
Lin, David
Liou, Lihyeh
Longbrake, Matthew
Pemberton, Thomas
TI Real-time imbalance compensator for wideband receiver applications
SO IET RADAR SONAR AND NAVIGATION
LA English
DT Article
ID I/Q IMBALANCE
AB To increase the bandwidth of a wideband receiver for surveillance applications, an in-phase/quadrature-phase (I/Q) channel-based receiver is a potential approach. However, the image caused by an imperfect coupler prevents the I/Q channel-based receiver from becoming a reality. Air Force Research Laboratory developed an imbalance compensation method covering two Nyquist zones. In this study, the authors present its implementation with a field-programmable gate array board. Experimental results demonstrate the effectiveness of the proposed imbalance compensation algorithm and its feasibility.
C1 [Mancuso, Vincent] Northrop Grumman Elect Syst, Baltimore, MD USA.
[Buxa, Peter; Lin, David; Liou, Lihyeh; Longbrake, Matthew; Pemberton, Thomas] US Air Force Res Lab, Sensor Directorate, Dayton, OH USA.
[Cheng, Chi-Hao] Miami Univ, Elect & Comp Engn, Oxford, OH 45056 USA.
RP Cheng, CH (reprint author), Miami Univ, Elect & Comp Engn, Oxford, OH 45056 USA.
EM chengc@miamioh.edu
FU AFRL/DAGSI Student-Faculty Research Fellowship program
FX This work is partially supported by AFRL/DAGSI Student-Faculty Research
Fellowship program
NR 23
TC 0
Z9 0
U1 2
U2 4
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1751-8784
EI 1751-8792
J9 IET RADAR SONAR NAV
JI IET Radar Sonar Navig.
PD AUG
PY 2015
VL 9
IS 7
BP 743
EP 750
DI 10.1049/iet-rsn.2014.0347
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CN4FZ
UT WOS:000358387300001
ER
PT J
AU Garcia, E
Casbeer, DW
Pachter, M
AF Garcia, Eloy
Casbeer, David W.
Pachter, Meir
TI Cooperative Strategies for Optimal Aircraft Defense from an Attacking
Missile
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID MOVING TARGET; GUIDANCE; PURSUIT; LINE
C1 [Garcia, Eloy; Casbeer, David W.] US Air Force, Inst Technol, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Pachter, Meir] US Air Force, Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH 45433 USA.
RP Garcia, E (reprint author), US Air Force, Inst Technol, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
EM elgarcia@infoscitex.com; david.casbeer@us.af.mil; meir.pachter@afit.edu
NR 28
TC 3
Z9 3
U1 0
U2 13
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD AUG
PY 2015
VL 38
IS 8
BP 1510
EP 1520
DI 10.2514/1.G001083
PG 11
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CN1DF
UT WOS:000358156200015
ER
PT J
AU Gowayed, Y
Ojard, G
Santhosh, U
Jefferson, G
AF Gowayed, Y.
Ojard, G.
Santhosh, U.
Jefferson, G.
TI Modeling of crack density in ceramic matrix composites
SO JOURNAL OF COMPOSITE MATERIALS
LA English
DT Article
DE Ceramic matrix composites; matrix cracking; modeling
ID ELASTIC PROPERTIES; TEXTILE COMPOSITES; STRESS; PREDICT
AB The feasibility of utilizing the shear lag theory to estimate crack density in fabric reinforced composites was investigated. A geometric model was constructed for the fabric and meshed using a hybrid finite element approach. The small segment of the yarn and the surrounding matrix enclosed within each element were treated as a unidirectional composite and the shear lag theory was used to estimate the crack density. Model results were compared to experimental data for a 5-harness satin melt-infiltrated SiC/SiC composite under tension and showed a pattern similar to experimental data with the model starting to accumulate cracks at a stress corresponding to the point of departure from linearity in the stress-strain curve while cracks were experimentally observed around 60MPa higher. The model and experimental data had a similar value for the crack density at the saturation level. Sensitivity analysis showed that the crack density was highly sensitive to the fiber volume fraction in the load direction followed by the weave angle of the crimped segments of the yarns and the interfacial shear strength between the fibers and the matrix.
C1 [Gowayed, Y.] Auburn Univ, Dept Polymer & Fiber Engn, Auburn, AL 36849 USA.
[Ojard, G.] Pratt & Whitney East, Hartford, CT USA.
[Santhosh, U.] Struct Analyt Inc, Carlsbad, CA USA.
[Jefferson, G.] AFRL RXLN, Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Gowayed, Y (reprint author), Auburn Univ, Dept Polymer & Fiber Engn, Auburn, AL 36849 USA.
EM gowayya@auburn.edu
FU Air Force Research Laboratory, Materials & Manufacturing Directorate,
Wright-Patterson AFB, OH, USA [FA8650-12-C-5107, FA8650-12-C-5108]
FX The Air Force Research Laboratory, Materials & Manufacturing
Directorate, Wright-Patterson AFB, OH, USA supported this effort under
contract FA8650-12-C-5107and FA8650-12-C-5108.
NR 15
TC 7
Z9 7
U1 2
U2 14
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0021-9983
EI 1530-793X
J9 J COMPOS MATER
JI J. Compos Mater.
PD AUG
PY 2015
VL 49
IS 18
BP 2285
EP 2294
DI 10.1177/0021998314545188
PG 10
WC Materials Science, Composites
SC Materials Science
GA CN0DI
UT WOS:000358082700009
ER
PT J
AU Miller, SC
Whitehead, CR
Otte, CN
Wells, TS
Webb, TS
Gore, RK
Maynard, C
AF Miller, Shannon C.
Whitehead, Casserly R.
Otte, Clifford N.
Wells, Timothy S.
Webb, Timothy S.
Gore, Russell K.
Maynard, Charles
TI Risk for broad-spectrum neuropsychiatric disorders after mild traumatic
brain injury in a cohort of US Air Force personnel
SO OCCUPATIONAL AND ENVIRONMENTAL MEDICINE
LA English
DT Article
ID POSTTRAUMATIC-STRESS-DISORDER; POSTCONCUSSIVE SYMPTOMS; HEAD-INJURY;
DEPRESSION; IRAQ; SCHIZOPHRENIA; AFGHANISTAN; VETERANS; POPULATION;
CONCUSSION
AB Background Military personnel are at increased risk for traumatic brain injury (TBI) from combat and non-combat exposures. Sequelae of moderate-to-severe TBI are well described, but the literature remains conflicted regarding whether mild TBI (mTBI) results in lasting brain injury and functional impairments. This study assessed risk for a range of neuropsychiatric disorders presenting after mTBI while adjusting for the potential confounds of depression and post-traumatic stress disorder (PTSD).
Methods A historical prospective association study was conducted utilising electronic demographic, medical and military-specific data for over 49 000 active duty US Air Force service members (Airmen). This study utilised diagnostic codes considered by an expert panel to be indicative of mTBI to identify cases. Cox proportional hazards modelling calculated HRs for neuropsychiatric outcomes while controlling for varying lengths of follow-up and potentially confounding variables.
Results Airmen with mTBI were at increased risk for specific neuropsychiatric disorders compared with a similarly injured non-mTBI control group. HRs for memory loss/amnesia, cognitive disorders, schizophrenia, PTSD, and depression were significantly elevated and remained so for at least 6 months post-mTBI, even after eliminating those with previous neuropsychiatric diagnoses.
Conclusions mTBI was positively associated with neuropsychiatric disorders in this population of primarily young adult males; with increased HRs 6 months post-mTBI. The results support that mTBI is distinguished from moderate-to-severe TBI in terms of risk for developing neuropsychiatric disorders. Further, these findings suggest the importance of screening for psychiatric and cognitive disorders post-mTBI in general medical practice.
C1 [Miller, Shannon C.; Wells, Timothy S.; Gore, Russell K.] Vet Affairs Med Ctr, Cincinnati, OH 45267 USA.
[Miller, Shannon C.] Univ Cincinnati, Dept Psychiat & Behav Neurosci, Addict Sci Div, Cincinnati, OH USA.
[Miller, Shannon C.] Air Force Res Lab, Vulnerabil Anal Branch, Wright Patterson AFB, OH USA.
[Whitehead, Casserly R.] Infoscitex Corp, Dayton, OH 45431 USA.
[Wells, Timothy S.] Def Hlth Program, Res Management Div, Plans & Programs Off, Wright Patterson AFB, OH USA.
[Gore, Russell K.] Sports Concuss Inst, Atlanta, GA USA.
[Maynard, Charles] Epidemiol Res & Informat Ctr ERIC, Seattle, WA USA.
RP Whitehead, CR (reprint author), Infoscitex Corp, 4027 Colonel Glenn Highway,Suite 210, Dayton, OH 45431 USA.
EM Casserly.Whitehead.ctr@US.AF.MIL
RI Maynard, Charles/N-3906-2015; Gore, Russell/N-8988-2016
OI Maynard, Charles/0000-0002-1644-7814; Gore, Russell/0000-0002-8012-1579
FU Defense Center of Excellence for Psychological Health and Traumatic
Brain Injury; Department of Veterans Affairs
FX This study was funded by the Defense Center of Excellence for
Psychological Health and Traumatic Brain Injury, with work also
supported in part by the Department of Veterans Affairs. This study was
conducted in accordance with all applicable federal regulations
governing the protection of human subjects in research as approved by
Air Force Research Laboratory/Wright Site Institutional Review Board
(Protocol F-WR-2009-0066-H).
NR 40
TC 2
Z9 2
U1 2
U2 7
PU BMJ PUBLISHING GROUP
PI LONDON
PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND
SN 1351-0711
EI 1470-7926
J9 OCCUP ENVIRON MED
JI Occup. Environ. Med.
PD AUG
PY 2015
VL 72
IS 8
BP 560
EP 566
DI 10.1136/oemed-2014-102646
PG 7
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA CM9IB
UT WOS:000358020600005
PM 25896331
ER
PT J
AU Camburn, B
Dunlap, B
Gurjar, T
Hamon, C
Green, M
Jensen, D
Crawford, R
Otto, K
Wood, K
AF Camburn, Bradley
Dunlap, Brock
Gurjar, Tanmay
Hamon, Christopher
Green, Matthew
Jensen, Daniel
Crawford, Richard
Otto, Kevin
Wood, Kristin
TI A Systematic Method for Design Prototyping
SO JOURNAL OF MECHANICAL DESIGN
LA English
DT Article
ID PRODUCT DEVELOPMENT; RAPID PROTOTYPES
AB Scientific evaluation of prototyping practices is an emerging field in design research. Prototyping is critical to the success of product development efforts, and yet its implementation in practice is often guided by ad hoc experience. To address this need, we seek to advance the study and development of prototyping principles, techniques, and tools. A method to repeatedly enhance the outcome of prototyping efforts is reported in this paper. The research methodology to develop this method is as follows: (1) systematically identify practices that improve prototyping; (2) synthesize these practices to form a guiding method for designers; and (3) validate that the proposed method encourages best practices and improves performance. Prototyping practices are represented as six key heuristics to guide a designer in planning: how many iterations to pursue, how many unique design concepts to explore in parallel, as well as the use of scaled prototypes, isolated subsystem prototypes, relaxed requirements, and virtual prototypes. The method is correlated, through experimental investigation, with increased application of these best practices and improved design performance outcomes. These observations hold across various design problems studied. This method is novel in providing a systematic approach to prototyping.
C1 [Camburn, Bradley; Otto, Kevin; Wood, Kristin] Singapore Univ Technol & Design, Engn Prod Dev, Singapore 138682, Singapore.
[Dunlap, Brock; Gurjar, Tanmay; Hamon, Christopher; Crawford, Richard] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
[Green, Matthew] Le Tourneau Univ, Dept Mech Engn, Longview, TX 75602 USA.
[Jensen, Daniel] US Air Force Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA.
RP Camburn, B (reprint author), Singapore Univ Technol & Design, Engn Prod Dev, 20 Dover Dr, Singapore 138682, Singapore.
EM bradley_camburn@sutd.edu.sg; bdunlap@utexas.edu;
tanmaygurjar@utexas.edu; xamon@utexas.edu; matthewgreen@letu.edu;
dan.jensen@usafa.edu; rhc@mail.utexas.edu; kevin_otto@sutd.edu.sg;
kristinwood@sutd.edu.sg
FU Singapore University of Technology and Design (SUTD); SUTD-MIT
International Design Center (IDC); United Sates Air Force Academy
[FA7000-12-2-2005]
FX This work was supported by the Singapore University of Technology and
Design (SUTD) and the SUTD-MIT International Design Center (IDC,
idc.sutd.edu.sg). This material is also based in part on research
sponsored by the United Sates Air Force Academy under Agreement No.
FA7000-12-2-2005. The U.S. Government is authorized to reproduce and
distribute reprints for Government purposes notwithstanding any
copyright notation thereon.
NR 38
TC 0
Z9 0
U1 1
U2 9
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1050-0472
J9 J MECH DESIGN
JI J. Mech. Des.
PD AUG
PY 2015
VL 137
IS 8
AR 081102
DI 10.1115/1.4030331
PG 12
WC Engineering, Mechanical
SC Engineering
GA CM0BC
UT WOS:000357342200002
ER
PT J
AU Jiang, J
Pachter, R
Mehmood, F
Islam, AE
Maruyama, B
Boeckl, JJ
AF Jiang, Jie
Pachter, Ruth
Mehmood, Faisal
Islam, Ahmad E.
Maruyama, Benji
Boeckl, John J.
TI A Raman spectroscopy signature for characterizing defective single-layer
graphene: Defect-induced I(D)/I(D ') intensity ratio by theoretical
analysis
SO CARBON
LA English
DT Article
ID CARBON NANOTUBES; BACK SCATTERING; OXYGEN; OXIDE; MONOVACANCY;
STABILITY; VACANCIES; ABSENCE; ATOM; GAS
AB To distinguish defects in defective single-layer graphene (DSLG), we developed a method combining first principles density functional theory and tight-binding that quantifies defect-induced Raman intensities. Analysis of defect potentials for defects with vacancies and/or bond rotation has shown that on-site variation dominates the scattering, and also quantified effects of oxygen adsorption. Defect potentials for DSLG were subsequently used in calculation of the electron-defect matrix elements and Raman intensities. I(D)/I(D') intensity ratios, dependent on defect topology and oxygen impurity adsorption, were elucidated for mono-vacancy, double-vacancy, Stone-Wales, and so-called 555-777 and 5555-6-7777 point defects in single-layer graphene. The results demonstrated for the first time the ability to distinguish between these defect types, also as dependent of oxygen adsorption, and were found consistent with a measured value for vacancies. Importantly, our theoretical prediction of the I(D)/I(D') Raman intensity signature metric can assist in experimental characterization of defective realistic graphene samples for any defect type. Finally, analytical analysis of the angular dependence of the electron-defect scattering matrix elements revealed a node effect in intra-valley backscattering but not in inter-valley backscattering, rationalizing the observation that the D' band intensity is mostly weaker than that of the D band. Published by Elsevier Ltd.
C1 [Jiang, Jie; Pachter, Ruth; Mehmood, Faisal; Islam, Ahmad E.; Maruyama, Benji; Boeckl, John J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Pachter, R (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support by the Air Force Office of Scientific
Research and computational resources and helpful assistance provided by
the AFRL DSRC.
NR 47
TC 8
Z9 8
U1 16
U2 89
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
EI 1873-3891
J9 CARBON
JI Carbon
PD AUG
PY 2015
VL 90
BP 53
EP 62
DI 10.1016/j.carbon.2015.03.049
PG 10
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CK3PY
UT WOS:000356129200007
ER
PT J
AU Sabelkin, V
Zawada, L
Mall, S
AF Sabelkin, V.
Zawada, L.
Mall, S.
TI Effects of combustion and salt-fog exposure on fatigue behavior of two
ceramic matrix composites and a superalloy
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article
ID HIGH-TEMPERATURE; ELEVATED-TEMPERATURE; BORON-NITRIDE; SIC/SIC
COMPOSITE; SILICON-CARBIDE; WATER-VAPOR; ENVIRONMENT; OXIDATION;
MOISTURE; RUPTURE
AB Tension-tension fatigue behavior of two ceramic matrix composites (CMCs), SiC/SiC (Nicalon (TM)/SiC) & oxide/oxide (Nextel (TM) 720/AS), and a superalloy (Ren, 41) was characterized under combustion environment as well as under alternate salt-fog exposure for 4 h and combustion fatigue for 6 h. The run-out limit was 25 h (90,000 cycles) of fatigue. Test temperatures were 900, 1050, and 1050 A degrees C for Ren, 41, SiC/SiC, and oxide/oxide CMCs, respectively, and the applied maximum fatigue stress was 62 MPa. All three materials survived up to 25 h under combustion fatigue without any exposure to salt. Ren, 41 and Nicalon (TM)/SiC survived up to 25 h (90,000 cycles) under the alternate exposure of salt-fog and combustion fatigue. However, exposure to salt-fog exposure (5 wt%) had very detrimental effect on the combustion fatigue resistance of Nextel (TM) 720/AS. The reduction in salt concentration to 0.5 wt% had less detrimental effect. These tests were supplemented with more tests, where applied stress level, test temperature, and salt concentration were changed. Out of these three gas turbine engine materials, Nicalon (TM)/SiC exhibited better fatigue performance in terms of applied temperature and stress level under combustion condition as well as when exposed to alternate salt-fog and combustion.
C1 [Sabelkin, V.; Mall, S.] AFIT ENY, Air Force Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Zawada, L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), AFIT ENY, Air Force Inst Technol, Dept Aeronaut & Astronaut, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM shankar.mall@afit.edu
NR 36
TC 1
Z9 1
U1 2
U2 20
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
EI 1573-4803
J9 J MATER SCI
JI J. Mater. Sci.
PD AUG
PY 2015
VL 50
IS 15
BP 5204
EP 5213
DI 10.1007/s10853-015-9068-z
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA CI7RH
UT WOS:000354961400010
ER
PT J
AU Carter, JLW
Sosa, JM
Shade, PA
Fraser, HL
Uchic, MD
Mills, MJ
AF Carter, Jennifer L. W.
Sosa, John M.
Shade, Paul A.
Fraser, Hamish L.
Uchic, Michael D.
Mills, Michael J.
TI The potential link between high angle grain boundary morphology and
grain boundary deformation in a nickel-based superalloy
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Serial sectioning; 3D reconstruction; Nickel-based superalloys; Grain
boundary sliding
ID WATERSHEDS; BEAM
AB Focused ion beam (FIB) based serial sectioning was utilized to characterize the morphology of two high angle grain boundaries (HAGB) in a nickel based superalloy, one that experienced grain boundary sliding (GBS) and the other experienced strain accumulation, during elevated temperature constant stress loading conditions. A custom script was utilized to serial section and collect ion-induced secondary electron images from the FIB-SEM system. The MATLAB based MIPAR (TM) software was utilized to align, segment and reconstruct 3D volumes from the sectioned images. Analysis of the 3D data indicates that the HAGB that exhibited GBS had microscale curvature that was planar in nature, and local serrations on the order of +/- 150 nm. In contrast, the HAGB that exhibited strain accumulation was not planar and had local serrations an order of magnitude greater than the other grain boundary. It is hypothesized that the serrations and the local grain boundary network are key factors in determining which grain boundaries experience GBS during creep deformation. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Carter, Jennifer L. W.; Mills, Michael J.] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 44321 USA.
[Sosa, John M.; Fraser, Hamish L.] Ohio State Univ, Ctr Accelerated Maturat Mat, Columbus, OH 44321 USA.
[Shade, Paul A.; Uchic, Michael D.] Air Force Res Lab, Mat & Mfg Directorate, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
RP Carter, JLW (reprint author), Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA.
EM jennifer.w.carter@case.edu
RI Shade, Paul/H-6459-2011; Carter, Jennifer/A-3241-2013;
OI Carter, Jennifer/0000-0001-6702-729X; Sosa, John/0000-0003-4519-7970
FU Air Force Research Laboratory (AFRL) STW-21 Program [FA9550-09-1-0014]
FX Funding was provided by the lAir Force Research Laboratory (AFRL) STW-21
Program FA9550-09-1-0014.
NR 17
TC 2
Z9 2
U1 3
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD JUL 29
PY 2015
VL 640
BP 280
EP 286
DI 10.1016/j.msea.2015.05.031
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA CN7PN
UT WOS:000358626600032
ER
PT J
AU Spradlin, TJ
Hodges, JL
AF Spradlin, Thomas J.
Hodges, Joshua L.
TI Predictive Crack Growth Technique for Laser Peening Process Development
SO JOURNAL OF ENGINEERING-JOE
LA English
DT Article
AB Laser peening (LP) has shown excellent fatigue life extension in numerous tests with typical treatments garnering 2-4 times the fatigue performance of an untreated component. Initially, large test programs were implemented to determine the best LP parameters for a given scenario, eventually being augmented by physics-based modeling due to the large design space available to the LP process. Approval for these processes continues to be on a case-by-case basis, contingent on multiple factors: cost, applicability, time, % fatigue life extension, and ability to track crack growth. Because LP induces compressive residual stresses in the near surface region, the compensatory tensile residual stresses are shifted sub-surface. While an axial tensile load would be mitigated by surface compressive stresses, sub-surface a crack can propagate rapidly via tensile stresses. Current predictive methods lack the ability to track this sub-surface behavior, limiting the accuracy of fatigue crack growth predictions throughout the various design stages of an LP treatment. This work demonstrates a framework that incorporates user-defined geometry, material data, crack growth data, mechanical loading, and residual stresses to predict the crack front shape evolution in 3D solids. A baseline case with no residual stresses is simulated and compared with a closed form solution.
C1 [Spradlin, Thomas J.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Hodges, Joshua L.] US Air Force, Struct Integr & Anal Grp T38, Hill AFB, UT 84056 USA.
RP Spradlin, TJ (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM thomas.spradlin.1@us.af.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 2051-3305
J9 J ENG-JOE
JI J. Eng.-JOE
PD JUL 29
PY 2015
DI 10.1049/joe.2015.0110
PG 6
WC Engineering, Multidisciplinary
SC Engineering
GA DU8EC
UT WOS:000382445100001
ER
PT J
AU Huang, CS
AF Huang, Chao-Song
TI Storm-to-storm main phase repeatability of the local time variation of
disturbed low-latitude vertical ion drifts
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
DE penetration electric field; equatorial ionosphere; magnetic storm
ID IONOSPHERIC ELECTRIC-FIELDS; PENETRATION; MODEL; EQUATOR; FLOWS; CINDI
AB Penetration electric field can be very strong during magnetic storms. However, the variation of penetration electric field with local time (LT) has not been well understood. The Communication/Navigation Outage Forecasting System (C/NOFS) satellite measures the plasma drift/electric field over all local times within similar to 100min. In this paper, we present the first nearly simultaneous observations of the dependence of penetration electric field on local time. The meridional ion drift measured by C/NOFS during the main phase of five magnetic storms in 2012 is analyzed. The storm time ion drift shows a large enhancement around 1900LT, a relatively small enhancement during daytime, and a deep decrease in the postmidnight sector with a peak around 0500LT. The observed storm time variation of the meridional ion drift with local time represents the variation of the penetration electric field. The averaged ion drifts are in remarkable agreement with recent simulations.
C1 Kirtland AFB, Air Force Res Lab, Albuquerque, NM 87116 USA.
RP Huang, CS (reprint author), Kirtland AFB, Air Force Res Lab, Albuquerque, NM 87116 USA.
EM chaosong.huang.1@us.af.mil
FU NASA [NNH15AZ81I, NNX15AB83G, NAS5-01068]
FX Work at the Air Force Research Laboratory was supported by NASA grant
NNH15AZ81I and is part of the NASA sponsored project NNX15AB83G. The
author thanks Marc Hairston for his comments on the manuscript. CINDI
data are provided through the auspices of the CINDI team at the
University of Texas at Dallas supported by NASA grant NAS5-01068. C/NOFS
data are available in the NASA database
NR 23
TC 1
Z9 1
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JUL 28
PY 2015
VL 42
IS 14
BP 5694
EP 5701
DI 10.1002/2015GL064674
PG 8
WC Geosciences, Multidisciplinary
SC Geology
GA CO7CU
UT WOS:000359316100003
ER
PT J
AU Welch, CM
Camden, AN
Barr, SA
Leuty, GM
Kedziora, GS
Berry, RJ
AF Welch, Corrinne M.
Camden, Aerial N.
Barr, Stephen A.
Leuty, Gary M.
Kedziora, Gary S.
Berry, Rajiv J.
TI Computation of the binding free energy of peptides to graphene in
explicit water
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; DRUG-DELIVERY; FUNCTIONALIZATION;
ADSORPTION; INTERFACE; SURFACES; SYSTEM; FILMS
AB The characteristic properties of graphene make it useful in an assortment of applications. One particular application-the use of graphene in biosensors-requires a thorough understanding of graphene-peptide interactions. In this study, the binding of glycine (G) capped amino acid residues (termed GXG tripeptides) to trilayer graphene surfaces in aqueous solution was examined and compared to results previously obtained for peptide binding to single-layer free-standing graphene [A. N. Camden, S. A. Barr, and R. J. Berry, J. Phys. Chem. B 117, 10691-10697 (2013)]. In order to understand the interactions between the peptides and the surface, binding enthalpy and free energy values were calculated for each GXG system, where X cycled through the typical 20 amino acids. When the GXG tripeptides were bound to the surface, distinct conformations were observed, each with a different binding enthalpy. Analysis of the binding energy showed the binding of peptides to trilayer graphene was dominated by van der Waals interactions, unlike the free-standing graphene systems, where the binding was predominantly electrostatic in nature. These results demonstrate the utility of computational materials science in the mechanistic explanation of surface-biomolecule interactions which could be applied to a wide range of systems.
C1 [Welch, Corrinne M.; Camden, Aerial N.; Barr, Stephen A.; Leuty, Gary M.; Berry, Rajiv J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Kedziora, Gary S.] Air Force Res Lab, Engil Corp, AFRL RCM, Wright Patterson AFB, OH 45433 USA.
RP Berry, RJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM Rajiv.Berry@us.af.mil
NR 26
TC 5
Z9 5
U1 8
U2 34
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUL 28
PY 2015
VL 143
IS 4
AR 045104
DI 10.1063/1.4927344
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CO1QC
UT WOS:000358929100073
PM 26233167
ER
PT J
AU Hwang, J
Jeon, J
Yoon, S
Kang, BS
Kim, DK
Kim, HS
Kang, SW
Kim, JO
Jang, WY
Urbas, A
Ku, Z
Lee, SJ
AF Hwang, Jehwan
Jeon, Jiyeon
Yoon, Sujin
Kang, Byung Soo
Kim, Deok-Kee
Kim, Ha Sul
Kang, Sang-Woo
Kim, Jun Oh
Jang, Woo-Yong
Urbas, Augustine
Ku, Zahyun
Lee, Sang Jun
TI Surface plasmon resonant splitting and merging due to infrared incidence
through thermal imaging lens
SO ELECTRONICS LETTERS
LA English
DT Article
AB In previous work, the present authors discovered the resonant splitting phenomenon of a plasmonic perforated gold film (PGF), as the incident light comes in the polar angle. However, in reality, the light through the imaging lens could be incident on the PGF not only in the polar angle but also in the azimuth angle. The transmission of a PGF against the incident light is analysed in both polar and azimuth angles in spherical coordinates. To mimic the incidence through the lens, a PGF sample is rotated by simultaneously varying both types of angles as normal incidence arrives. For the measurement, the sample has been fabricated with a PGF on a semi-insulating gallium arsenide (GaAs) substrate. The measured transmission spectra show both resonant splitting and merging under TM and TE polarisations as the azimuth angle is increased. Results drawn from this work will pave the way to fully understanding the interaction between the imaging lens and the plasmonic structure (PGF).
C1 [Hwang, Jehwan; Jeon, Jiyeon; Yoon, Sujin; Kang, Byung Soo; Kang, Sang-Woo; Kim, Jun Oh; Lee, Sang Jun] Korea Res Inst Stand & Sci, Div Ind Metrol, Daejeon 305340, South Korea.
[Kim, Deok-Kee] Sejong Univ, Dept Elect Engn, Seoul 143747, South Korea.
[Kim, Ha Sul] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea.
[Jang, Woo-Yong; Urbas, Augustine; Ku, Zahyun] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Lee, SJ (reprint author), Korea Res Inst Stand & Sci, Div Ind Metrol, Daejeon 305340, South Korea.
EM sjlee@kriss.re.kr
FU KRISS [GP2014-0028]; Korea Evaluation Institute of Industrial Technology
(KEIT) - Korea government (MOTIE) [100446953]; AOARD - US government
(AFOSR/AOARD) [FA2386-14-1-4074]
FX This work was supported by the KRISS grant GP2014-0028 and the Korea
Evaluation Institute of Industrial Technology (KEIT) grant 100446953
funded by the Korea government (MOTIE) and the AOARD grant
FA2386-14-1-4074 funded by the US government (AFOSR/AOARD).
NR 4
TC 2
Z9 2
U1 0
U2 5
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
EI 1350-911X
J9 ELECTRON LETT
JI Electron. Lett.
PD JUL 23
PY 2015
VL 51
IS 15
BP 1170
EP 1171
DI 10.1049/el.2015.0481
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA CN0SO
UT WOS:000358124000022
ER
PT J
AU He, GS
Prasad, PN
Kannan, R
Tan, LS
AF He, Guang S.
Prasad, Paras N.
Kannan, Ramamurthi
Tan, Loon-Seng
TI Highly efficient and two-photon excited stimulated Rayleigh-Bragg
scattering in organic solutions
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID BRILLOUIN-SCATTERING; PHASE-CONJUGATION; LIGHT; LIQUIDS; PULSES; WAVES
AB The properties of backward stimulated Rayleigh-Bragg scattering (SRBS) in three highly two-photon active AF-chromophores solutions in tetrahydrofuran (THF) have been investigated using 816-nm and 8-ns pump laser beam. The nonlinear reflectivity R, spectral structure, temporal behavior, and phase-conjugation capability of the backward SRBS output have been measured, respectively. Under the same experimental condition, the pump threshold for SRBS in three solution samples can be significantly (similar to one order of magnitude) lower than that for stimulated Brillouin scattering (SBS) in the pure solvent (THF). With the optimized concentration value and at a moderate pump energy (similar to 1.5 mJ) level, the measured nonlinear reflectivity was R >= 35% for the 2 cm-long solution sample, while for the SBS from a pure solvent sample of the same length was R approximate to 4.7%. The peculiar features of very low pump threshold, no spectral shift, tolerant pump spectral linewidth requirement (<= 1 cm(-1)), and phase-conjugation capability are favorable for those nonlinear photonics applications, such as highly efficiency phase-conjugation reflectors for high-brightness laser oscillator/amplifier systems, special imaging through turbid medium, self-adaptive remote optical sensing, as well as for optical rangefinder and lidar systems. (C) 2015 AIP Publishing LLC.
C1 [He, Guang S.; Prasad, Paras N.] SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA.
[Kannan, Ramamurthi; Tan, Loon-Seng] AFRL RX, Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP He, GS (reprint author), SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA.
EM gshe@buffalo.edu
RI Tan, Loon-Seng/F-6985-2012
OI Tan, Loon-Seng/0000-0002-2134-9290
NR 27
TC 2
Z9 2
U1 2
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 21
PY 2015
VL 118
IS 3
AR 033102
DI 10.1063/1.4926993
PG 8
WC Physics, Applied
SC Physics
GA CN4VT
UT WOS:000358429200002
ER
PT J
AU Park, J
Innes, DE
Bucik, R
Moon, YJ
Kahler, SW
AF Park, Jinhye
Innes, D. E.
Bucik, R.
Moon, Y. -J.
Kahler, S. W.
TI STUDY OF SOLAR ENERGETIC PARTICLE ASSOCIATIONS WITH CORONAL
EXTREME-ULTRAVIOLET WAVES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: activity; Sun: coronal mass ejections (CMEs); Sun: magnetic fields;
Sun: particle emission
ID MASS EJECTION; SOHO/EIT OBSERVATIONS; MEV PROTONS; EVENTS; ACCELERATION;
STEREO; SHOCK; HELIOSPHERE; INJECTION; FRONTS
AB We study the relationship between large gradual solar energetic particle (SEP) events and associated extreme-ultraviolet (EUV) wave properties in 16 events that occurred between 2010 August and 2013 May and were observed by SDO, the Solar and Heliospheric Observatory (SOHO), and/or STEREO. We determine onset times, peak times, and peak fluxes of the SEP events in the SOHO/ERNE and STEREO/LET proton channels (6-10 MeV). The EUV wave arrival times and their speeds from the source sites to the spacecraft footpoints in the photosphere, which are magnetically connected to the spacecraft by Parker spiral and potential fields, are determined by spacetime plots from the full-Sun heliographic images created by combining STEREO-A and STEREO-B 195 angstrom and SDO 193 angstrom images. The SEP peak fluxes increase with the EUV wave speeds, and the SEP spectral indices become harder with the speeds. This shows that higher energetic particle fluxes are associated with faster EUV waves, which are considered as the lateral expansions of coronal-mass-ejection-driven shocks in the low corona.
C1 [Park, Jinhye; Moon, Y. -J.] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, South Korea.
[Innes, D. E.; Bucik, R.] Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany.
[Bucik, R.] Max Planck Princeton Ctr Plasma Phys, Princeton, NJ 08540 USA.
[Moon, Y. -J.] Kyung Hee Univ, Sch Space Res, Yongin 446701, South Korea.
[Kahler, S. W.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Park, J (reprint author), Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, South Korea.
EM jinhye@khu.ac.kr
RI Bucik, Radoslav/B-6501-2016
OI Bucik, Radoslav/0000-0001-7381-6949
FU AOARD [FA2386-13-1-4066]; BK21 plus program; AFOSR [2301RDZ4]
FX We thank SDO/AIA, STEREO/EUVI, and SOHO teams for the data. This work
has been supported by AOARD (FA2386-13-1-4066) and by the BK21 plus
program. S.W.K. was funded by AFOSR Task 2301RDZ4.
NR 41
TC 4
Z9 4
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 20
PY 2015
VL 808
IS 1
AR 3
DI 10.1088/0004-637X/808/1/3
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CO3MS
UT WOS:000359062500003
ER
PT J
AU Gwin, AH
Kodama, CH
Laurvick, TV
Coutu, RA
Taday, PF
AF Gwin, A. H.
Kodama, C. H.
Laurvick, T. V.
Coutu, R. A., Jr.
Taday, P. F.
TI Improved terahertz modulation using germanium telluride (GeTe)
chalcogenide thin films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID PHASE-CHANGE MATERIALS; MEMORY
AB We demonstrate improved terahertz (THz) modulation using thermally crystallized germanium telluride (GeTe) thin films. GeTe is a chalcogenide material that exhibits a nonvolatile, amorphous to crystalline phase change at approximately 200 degrees C, as well as six orders of magnitude decreased electrical resistivity. In this study, amorphous GeTe thin films were sputtered on sapphire substrates and then tested using THz time-domain spectroscopy (THz-TDS). The test samples, heated in-situ while collecting THz-TDS measurements, exhibited a gradual absorbance increase, an abrupt nonvolatile reduction at the transition temperature, followed by another gradual increase in absorbance. The transition temperature was verified by conducting similar thermal tests while monitoring electrical resistivity. THz transmittance modulation data were investigated between 10 and 110 cm(-1) (0.3-3.3 THz). A peak modulation of approximately 99% was achieved at 2.3 THz with a 100 nm GeTe film on a sapphire substrate. After isolating the sapphire and the crystalline GeTe (c-GeTe) absorbance contributions, the results showed THz modulations ranging from 88.5% to 91.5% that were attributed solely to the single layer of transitioned c-GeTe. These results strongly motivate using GeTe or other chalcogenide thin films in THz modulators, filters, and metamaterial applications. (C) 2015 Author(s).
C1 [Gwin, A. H.; Kodama, C. H.; Laurvick, T. V.; Coutu, R. A., Jr.] US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Taday, P. F.] TeraView Ltd, Applicat Grp, Cambridge CB4 0WS, England.
RP Coutu, RA (reprint author), US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM ronald.coutu@afit.edu
OI Gwin, Alex/0000-0001-6705-1898
NR 27
TC 1
Z9 1
U1 7
U2 38
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 20
PY 2015
VL 107
IS 3
AR 031904
DI 10.1063/1.4927272
PG 4
WC Physics, Applied
SC Physics
GA CN8FR
UT WOS:000358675600021
ER
PT J
AU Lancaster, A
Cook, G
McDaniel, SA
Evans, J
Berry, PA
Shephard, JD
Kar, AK
AF Lancaster, A.
Cook, G.
McDaniel, S. A.
Evans, J.
Berry, P. A.
Shephard, J. D.
Kar, A. K.
TI Mid-infrared laser emission from Fe: ZnSe cladding waveguides
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID NM; CRYSTAL; LOSSES; POWER
AB The authors present a mid-IR depressed cladding waveguide laser in Fe:ZnSe. The laser produced a maximum output power of 76 mW at 4122 nm and laser thresholds as low as 154 mW were demonstrated. This represents a 44% reduction in threshold power compared with the bulk laser system demonstrated in this paper. The waveguide laser was found to have a narrow spectral linewidth of 6 nm FHWM compared to the 50 nm typical of bulk Fe: ZnSe lasers. (C) 2015 Author(s).
C1 [Lancaster, A.; Shephard, J. D.; Kar, A. K.] Heriot Watt Univ, Inst Photon & Quantum Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
[Cook, G.; Evans, J.; Berry, P. A.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[McDaniel, S. A.] Leidos Inc, Beavercreek, OH 45431 USA.
RP Lancaster, A (reprint author), Heriot Watt Univ, Inst Photon & Quantum Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
EM a.k.kar@hw.ac.uk
RI Shephard, Jonathan/C-3947-2014
OI Shephard, Jonathan/0000-0001-9127-1428
FU AFRL Sensors Directorate, EOARD [FA8655-1-3026]; EPSRC [EP/G030227/1,
EP/K502844/1]
FX The authors acknowledge and thank support from AFRL Sensors Directorate,
EOARD (Grant No. FA8655-1-3026) and EPSRC (Grant No. EP/G030227/1). A.
Lancaster acknowledges support from EPSRC studentship EP/K502844/1.
NR 26
TC 6
Z9 6
U1 4
U2 30
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 20
PY 2015
VL 107
IS 3
AR 031108
DI 10.1063/1.4927384
PG 4
WC Physics, Applied
SC Physics
GA CN8FR
UT WOS:000358675600008
ER
PT J
AU Soref, R
Cleary, J
Fathpour, S
AF Soref, Richard
Cleary, Justin
Fathpour, Sasan
TI Special Section Guest Editorial: Nanoplasmonics
SO JOURNAL OF NANOPHOTONICS
LA English
DT Editorial Material
C1 [Soref, Richard] Univ Massachusetts, Engn Program, Boston, MA 02125 USA.
[Cleary, Justin] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Fathpour, Sasan] Univ Cent Florida, CREOL, Coll Opt & Photon, Orlando, FL 32816 USA.
RP Soref, R (reprint author), Univ Massachusetts, Engn Program, Harbor Campus, Boston, MA 02125 USA.
EM soref@rcn.com; justin.cleary.1@us.af.mil; fathpour@creol.ucf.edu
NR 0
TC 0
Z9 0
U1 1
U2 5
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1934-2608
J9 J NANOPHOTONICS
JI J. Nanophotonics
PD JUL 14
PY 2015
VL 9
AR 093701
PG 1
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA CM9GF
UT WOS:000358014700001
ER
PT J
AU Adomanis, BM
Watts, CM
Koirala, M
Liu, XL
Tyler, T
West, KG
Starr, T
Bringuier, JN
Starr, AF
Jokerst, NM
Padilla, WJ
AF Adomanis, Bryan M.
Watts, Claire M.
Koirala, Machhindra
Liu, Xianliang
Tyler, Talmage
West, Kevin G.
Starr, Tatiana
Bringuier, Jonathan N.
Starr, Anthony F.
Jokerst, Nan Marie
Padilla, Willie J.
TI Bi-layer metamaterials as fully functional near-perfect infrared
absorbers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BROAD-BAND; POLARIZATION; SENSOR; LIGHT
AB In this letter, we discuss the design, fabrication, and experimental characterization of a bi-layer fully functional near-perfect metamaterial absorber (MMA) in the long-wavelength infrared (LWIR), which is broadband and generally insensitive to polarization up to a 60 degrees incidence angle. A spectral absorptance of >= 99% was attained simultaneously at multiple LWIR wavelengths, with a bandwidth of 2 mu m where the absorptance is >= 90%. This remarkable behavior is attributed to the strong mixing of coupling modes between the two resonators and the ground plane in the presence of a lossy dielectric, in which single layer structures do not exhibit. Furthermore, we show, by comparing two different MMA structures, how the absorption can be tailored by design within and across several IR subdivisions through a slight change in geometrical parameters. The bi-layer MMA has the immediate application of a functionally versatile, low-profile thermal sensor or emitter. (C) 2015 AIP Publishing LLC.
C1 [Adomanis, Bryan M.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Watts, Claire M.; Koirala, Machhindra; Liu, Xianliang; Padilla, Willie J.] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
[Tyler, Talmage; Jokerst, Nan Marie] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA.
[West, Kevin G.; Starr, Tatiana; Bringuier, Jonathan N.; Starr, Anthony F.] SensorMetrix Inc, San Diego, CA 92121 USA.
RP Adomanis, BM (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM bryan.adomanis@us.af.mil; willie.padilla@duke.edu
FU Air Force Office of Scientific Research under U.S. Air Force
[FA9453-13-C-0005]; U.S. Navy [N00014-10-C-0437]
FX We would like to acknowledge partial funding from Air Force Office of
Scientific Research under U.S. Air Force Contract No. FA9453-13-C-0005
and U.S. Navy Contract No. N00014-10-C-0437. and we would like to thank
the Air Force Institute of Technology for support on FIDR measurements.
NR 48
TC 6
Z9 6
U1 9
U2 58
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 13
PY 2015
VL 107
IS 2
AR 021107
DI 10.1063/1.49264161
PG 5
WC Physics, Applied
SC Physics
GA CN6FS
UT WOS:000358530300007
ER
PT J
AU Yun, Y
Ma, C
Zhai, XF
Huang, HL
Meng, DC
Wang, JL
Fu, ZP
Peng, RR
Brown, GJ
Lu, YL
AF Yun, Yu
Ma, Chao
Zhai, Xiaofang
Huang, Haoliang
Meng, Dechao
Wang, Jianlin
Fu, Zhengping
Peng, Ranran
Brown, Gail J.
Lu, Yalin
TI Interface engineering in epitaxial growth of layered oxides via a
conducting layer insertion
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TEMPERATURE MULTIFERROIC PROPERTIES; METAL-INSULATOR-TRANSITION;
ROOM-TEMPERATURE; FILMS; CERAMICS; SYSTEM
AB There is a long-standing challenge in the fabrication of layered oxide epitaxial films due to their thermodynamic phase-instability and the large stacking layer number. Recently, the demand for high-quality thin films is strongly pushed by their promising room-temperature multiferroic properties. Here, we find that by inserting a conducting and lattice matched LaNiO3 buffer layer, high quality m = 5 Bi6FeCoTi3O18 epitaxial films can be fabricated using the laser molecular beam epitaxy, in which the atomic-scale sharp interface between the film and the metallic buffer layer explains the enhanced quality. The magnetic and ferroelectric properties of the high quality Bi6FeCoTi3O18 films are studied. This study demonstrates that insertion of the conducting layer is a powerful method in achieving high quality layered oxide thin films, which opens the door to further understand the underline physics and to develop new devices. (C) 2015 AIP Publishing LLC.
C1 [Yun, Yu; Ma, Chao; Zhai, Xiaofang; Huang, Haoliang; Meng, Dechao; Wang, Jianlin; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
[Yun, Yu; Huang, Haoliang; Meng, Dechao; Wang, Jianlin; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
[Zhai, Xiaofang; Huang, Haoliang; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China.
[Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lu, Yalin] US Air Force Acad, Dept Phys, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China.
RP Zhai, XF (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
EM xfzhai@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010; Ma, Chao/J-4569-2015
FU External Cooperation Program of BIC, Chinese Academy of Sciences
[211134KYSB20130017]; National Basic Research Program of China
[2012CB922000]; Fundamental Research Funds for the Central Universities;
U.S. Air Force Office of Scientific of Research (AFOSR)
FX This work was supported by the External Cooperation Program of BIC,
Chinese Academy of Sciences (211134KYSB20130017), the National Basic
Research Program of China (2012CB922000) and the Fundamental Research
Funds for the Central Universities. Y. Lu thanks the support from the
U.S. Air Force Office of Scientific of Research (AFOSR).
NR 29
TC 4
Z9 4
U1 11
U2 70
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 6
PY 2015
VL 107
IS 1
AR 011602
DI 10.1063/1.4926499
PG 4
WC Physics, Applied
SC Physics
GA CM6TX
UT WOS:000357824200009
ER
PT J
AU Rasna, M
Cmok, L
Evans, D
Mertelj, A
Dhara, S
AF Rasna, M. V.
Cmok, L.
Evans, D. R.
Mertelj, A.
Dhara, Surajit
TI Phase transitions, optical, dielectric and viscoelastic properties of
colloidal suspensions of BaTiO3 nanoparticles and cyanobiphenyl liquid
crystals
SO LIQUID CRYSTALS
LA English
DT Article
DE phase transitions; nanoparticles; viscoelastic properties; liquid
crystals
ID BENT-CORE MOLECULES; CARBON NANOTUBES; FREQUENCY; VISCOSITY; MIXTURES;
CELLS
AB We report experimental studies on the phase transitions and physical properties of colloidal suspensions of BaTiO3 nanoparticles and two cyanobiphenyl liquid crystals (4-pentyl-4MODIFIER LETTER PRIME-cyanobiphenyl and 4-octyl-4MODIFIER LETTER PRIME-cyanobiphenyl). From the differential scanning calorimetric measurements, we show that the nanoparticles have antagonistic effect on the isotropic to nematic and nematic to smectic-A phase transitions. The birefringence, dielectric anisotropy and splay elastic constant remain almost unchanged, whereas the bend elastic constant and rotational viscosity decrease considerably. The experimental results are discussed based on the possible contribution of BaTiO3 nanoparticles and free surfactant molecules in the suspensions.
C1 [Rasna, M. V.; Dhara, Surajit] Univ Hyderabad, Sch Phys, Hyderabad 500134, Andhra Pradesh, India.
[Cmok, L.] Univ Ljubljana, Dept Phys, Ljubljana 61000, Slovenia.
[Evans, D. R.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Mertelj, A.] Jozef Stefan Inst, Ljubljana, Slovenia.
RP Dhara, S (reprint author), Univ Hyderabad, Sch Phys, PO Cent Univ, Hyderabad 500134, Andhra Pradesh, India.
EM sdsp@uohyd.ernet.in
RI Mertelj, Alenka/C-6209-2011
OI Mertelj, Alenka/0000-0002-2766-9121
FU UPE-II; DST [SR/NM/NS-134/2010]; CSIR [03(1207)/12/EMR-II]; DST-PURSE
FX We gratefully acknowledge the support from the UPE-II,
DST(SR/NM/NS-134/2010), CSIR(03(1207)/12/EMR-II) and DST-PURSE. MVR
acknowledges UGC-BSR for fellowship.
NR 45
TC 4
Z9 4
U1 4
U2 11
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0267-8292
EI 1366-5855
J9 LIQ CRYST
JI Liq. Cryst.
PD JUL 3
PY 2015
VL 42
IS 7
BP 1059
EP 1067
DI 10.1080/02678292.2015.1021719
PG 9
WC Chemistry, Multidisciplinary; Crystallography; Materials Science,
Multidisciplinary
SC Chemistry; Crystallography; Materials Science
GA CO9YS
UT WOS:000359533500016
ER
PT J
AU Quintana, C
Millwater, HR
Singh, G
Golden, P
AF Quintana, Carolina
Millwater, Harry R.
Singh, Gulshan
Golden, Patrick
TI Optimal allocation of testing resources for statistical simulations
SO ENGINEERING OPTIMIZATION
LA English
DT Article
DE particle swarm optimization; Wishart distribution; multivariate
t-distribution; optimal experiments; variance reduction
AB Statistical estimates from simulation involve uncertainty caused by the variability in the input random variables due to limited data. Allocating resources to obtain more experimental data of the input variables to better characterize their probability distributions can reduce the variance of statistical estimates. The methodology proposed determines the optimal number of additional experiments required to minimize the variance of the output moments given single or multiple constraints. The method uses multivariate t-distribution and Wishart distribution to generate realizations of the population mean and covariance of the input variables, respectively, given an amount of available data. This method handles independent and correlated random variables. A particle swarm method is used for the optimization. The optimal number of additional experiments per variable depends on the number and variance of the initial data, the influence of the variable in the output function and the cost of each additional experiment. The methodology is demonstrated using a fretting fatigue example.
C1 [Quintana, Carolina; Millwater, Harry R.] Univ Texas San Antonio, Dept Mech Engn, San Antonio, TX 78249 USA.
[Singh, Gulshan] Baker Hughes, Tomball, TX USA.
[Golden, Patrick] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Millwater, HR (reprint author), Univ Texas San Antonio, Dept Mech Engn, San Antonio, TX 78249 USA.
EM harry.millwater@utsa.edu
FU National Science Foundation through the CREST Center for Simulation,
Visualization & Real Time Computing [HRD-0932339]
FX This research effort was funded in part under a grant from the National
Science Foundation [HRD-0932339] through the CREST Center for
Simulation, Visualization & Real Time Computing.
NR 11
TC 0
Z9 0
U1 2
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0305-215X
EI 1029-0273
J9 ENG OPTIMIZ
JI Eng. Optimiz.
PD JUL 3
PY 2015
VL 47
IS 7
BP 979
EP 993
DI 10.1080/0305215X.2014.933824
PG 15
WC Engineering, Multidisciplinary; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA CH3WX
UT WOS:000353962800007
ER
PT J
AU Wolf, EG
Baugh, LM
Kabban, CMS
Richards, MF
Prye, J
AF Wolf, E. George
Baugh, Laura M.
Kabban, Christine M. Schubert
Richards, Michael F.
Prye, Jennifer
TI Cognitive function in a traumatic brain injury hyperbaric oxygen
randomized trial
SO UNDERSEA AND HYPERBARIC MEDICINE
LA English
DT Article
DE traumatic brain injury; hyperbaric oxygen; cognitive function; TBI; HBO;
HBO2; HBOT; hydrostatic pressure; PTSD; post-traumatic stress disorder;
PCL; PCL-M; PCL-C
ID TEST-RETEST RELIABILITY; DELAYED NEUROPSYCHIATRIC SYNDROME;
POSTTRAUMATIC-STRESS-DISORDER; POST-CONCUSSION SYNDROME;
CLINICAL-SIGNIFICANCE; ENDOTHELIAL-CELLS; GENE-EXPRESSION; PRESSURES;
SYMPTOMS; VALIDITY
AB Objective: Determine changes in cognition and post traumatic stress disorder (PTSD) symptoms in subjects with traumatic brain injury (TBI) exposed to 2.4 atmospheres absolute (atm abs) breathing 100% oxygen vs. sham (1.3 atm-abs air).
Methods: Fifty randomized subjects completed a total of 30 exposures. A concussion history was taken, then baseline, post-series, and six-week follow-up immediate post-concussion assessment and cognitive testing, Brain checkers and PTSD Checklist for Military (PCL-M) tests were administered.
Results: No statistically significant differences between groups were noted, but both groups improved. Subgroups analyses, based on concussion history and individual test components, showed improvement in the treatment group vs. the sham. These subgroups included the number of concussive events, time from event to consent, loss of consciousness, visual memory, processing, go no go, and simple reaction time.
Conclusion: There was no statistically significant difference between a sham and 2.4 atm abs hyperbaric oxygen (HBO2) in cognitive scores from ImPACT and Brain checkers or composite scores in the PCL-M; however both groups showed improvement. Subgroups with favorable response to treatment are identified. Future studies evaluating HBO2 should consider concussion histories or focus on validating subgroup response to determine HBO2 as a potential adjunctive treatment for persistent symptoms following TBI.
C1 [Wolf, E. George; Richards, Michael F.; Prye, Jennifer] US Air Force, Sch Aerosp Med, Hyperbar Med Dept, 59th Med Wing, Lackland AFB, TX USA.
[Baugh, Laura M.] US Air Force Acad, Dept Neurol, Med Grp 10, Colorado Springs, CO 80840 USA.
[Kabban, Christine M. Schubert] ENC Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH USA.
RP Wolf, EG (reprint author), US Air Force, Sch Aerosp Med, Hyperbar Med Dept, 59th Med Wing, Lackland AFB, TX USA.
EM earl.wolf.ctr@us.af.mil
FU Air Force Medical Service; U.S. Navy Bureau of Medicine and Surgery;
U.S. Army Medical Materiel Development Activity; Injured Marine Semper
Fi Fund
FX The authors would like to recognize and thank the Air Force Medical
Service for funding this research project; the U.S. Navy Bureau of
Medicine and Surgery for funding temporary duty requirements; the U.S.
Army Medical Materiel Development Activity for end of study funding; Ms.
Sheila Galvin, Traumatic Brain Injury Program Coordinator for the
Wounded Warrior Regiment USMC for her superb service in coordinating
subject requirements; Ms. Karen Guenther and the Injured Marine Semper
Fi Fund for transportation support for subjects; and Dr. Jason Cromar,
while at USAFSAM, for coordinating the protocol.
NR 55
TC 6
Z9 8
U1 0
U2 1
PU UNDERSEA & HYPERBARIC MEDICAL SOC INC
PI DURHAM
PA 21 WEST COLONY PLACE, STE 280, DURHAM, NC 27705 USA
SN 1066-2936
J9 UNDERSEA HYPERBAR M
JI Undersea Hyperb. Med.
PD JUL-AUG
PY 2015
VL 42
IS 4
BP 313
EP 332
PG 20
WC Marine & Freshwater Biology; Medicine, Research & Experimental
SC Marine & Freshwater Biology; Research & Experimental Medicine
GA DB5RM
UT WOS:000368571300004
PM 26403017
ER
PT J
AU Johnson, JS
Grimaila, MR
Humphries, JW
Baumgartner, GB
AF Johnson, James S.
Grimaila, Michael R.
Humphries, Jeffrey W.
Baumgartner, Gerald B.
TI An analysis of error reconciliation protocols used in Quantum Key
Distribution systems
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Quantum Key Distribution; error reconciliation; quantum cryptography
ID CORRECTING CODES; TANNER GRAPHS
AB Quantum Key Distribution (QKD) is a revolutionary security technology that exploits the laws of quantum mechanics to achieve information-theoretic secure key exchange. QKD enables two parties to "grow" a shared secret key without placing any limits on an adversary's computational power. Error reconciliation protocols have been developed that preserve security while allowing a sender and receiver to reconcile the errors in their respective keys. The most famous of these is the Cascade protocol, which is effective but suffers from a high communication complexity and low throughput. The Winnow protocol reduces the communication complexity over Cascade, but has the disadvantage of introducing errors. Finally, Low Density Parity Check (LDPC) codes have been shown to reconcile errors at rates higher than those of Cascade and Winnow, but with greater computational complexity. In this paper we evaluate the effectiveness of LDPC codes by comparing the runtime, throughput and communication complexity empirically with the Cascade and Winnow algorithms. The effects of inaccurate error estimation, non-uniform error distribution and varying key length on all three protocols are evaluated for identical input key strings. Analyses are performed on the results in order to characterize the strengths and weaknesses of each protocol.
C1 [Johnson, James S.; Grimaila, Michael R.; Humphries, Jeffrey W.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Baumgartner, Gerald B.] Lab Telecommun Sci, College Pk, MD USA.
RP Grimaila, MR (reprint author), US Air Force, Inst Technol, AFIT ENV, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM michael.grimaila@afit.edu
NR 34
TC 0
Z9 0
U1 2
U2 2
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2015
VL 12
IS 3
BP 217
EP 227
DI 10.1177/1548512913503418
PG 11
WC Engineering, Multidisciplinary
SC Engineering
GA DA1IT
UT WOS:000367550200002
ER
PT J
AU Raulerson, EL
Hopkinson, KM
Laviers, KR
AF Raulerson, Evan L.
Hopkinson, Kenneth M.
Laviers, Kennard R.
TI A framework to facilitate cyber defense situational awareness modeled in
an emulated virtual machine testbed
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Cyberspace; intrusion detection; local area networks; modeling; sensor
fusion
ID NETWORK SECURITY; SYSTEMS
AB Modern computer networks and the cyber attacks launched against them grow more complex each year. Analyzing network information can be complex and time consuming. Network defenders are routinely unable to orient themselves quickly enough to determine the expected system impact, much less defend the networks' resources. The network operator's time would be better spent finding and executing event responses to minimize damage. Current automated response systems are mostly limited to scripted responses based on data from a single source. Better automation is required. This paper presents a framework that aggregates data from heterogeneous network sensors, including intrusion detection systems and network vulnerability assessment tools. An impact rating system is proposed and tested that estimates the feasibility of an attack and its potential impact. The impact assessments allow decision makers to prioritize attacks in real time and attempt to mitigate the attacks in order of their estimated network impact to the network. Experimental results indicated that when administrators are only concerned with high-level attacks, impact assessments could eliminate a mean 51.21% of irrelevant data. When only concerned with high-and medium-level attacks, a mean of 34.03% of the data was irrelevant. This represents a significant reduction in the information administrators must process.
C1 [Raulerson, Evan L.] US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Hopkinson, Kenneth M.; Laviers, Kennard R.] US Air Force, Inst Technol, Dept Elect & Comp Engn, Comp Sci, Wright Patterson AFB, OH 45433 USA.
RP Raulerson, EL (reprint author), US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM evan.raulerson@afit.edu
NR 16
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2015
VL 12
IS 3
BP 229
EP 239
DI 10.1177/1548512914552530
PG 11
WC Engineering, Multidisciplinary
SC Engineering
GA DA1IT
UT WOS:000367550200003
ER
PT J
AU Soban, DS
Zeune, C
AF Soban, Danielle S.
Zeune, Cale
TI Technology assessment for a complex aircraft system using technology
scenarios
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Technology infusion; resource allocation; military transport; trade
studies; short takeoff and landing; technology; aerodynamics; Technology
Readiness Level
AB Military decision makers need to understand and assess the benefits and consequences of their decisions in order to make cost efficient, timely, and successful choices. Technology selection is one such critical decision, especially when considering the design or retrofit of a complex system, such as an aircraft. An integrated and systematic methodology that will support decision making between technology alternatives and options while assessing the consequences of such decisions is a key enabler. This paper demonstrates, through application to a notional medium-range short takeoff and landing aircraft, one such enabler: the Technology Impact Forecasting (TIF) method. The goal of the TIF process is to explore both generic, undefined areas of technology, as well as specific technologies, and assess their potential impacts. This is actualized through the development and use of technology scenarios, and allows the designer to determine where to allocate resources for further technology definition and refinement, as well as provide useful design information. The paper particularly discusses the use of technology scenarios and demonstrates their use in the exploration of seven technologies of varying Technology Readiness Levels.
C1 [Soban, Danielle S.] Queens Univ Belfast, Sch Mech & Aerosp Engn, Belfast BT9 5AH, Antrim, North Ireland.
[Zeune, Cale] US Air Force, Res Lab, Aerodynam Technol Branch, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Soban, DS (reprint author), Queens Univ Belfast, 125 Stranmillis Rd,Ashby Bldg, Belfast BT9 5AH, Antrim, North Ireland.
EM d.soban@qub.ac.uk
NR 16
TC 0
Z9 0
U1 1
U2 3
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2015
VL 12
IS 3
BP 305
EP 318
DI 10.1177/1548512914540230
PG 14
WC Engineering, Multidisciplinary
SC Engineering
GA DA1IT
UT WOS:000367550200008
ER
PT J
AU Dougherty, S
Simpson, JR
Hill, RR
Pignatiello, JJ
White, ED
AF Dougherty, Shane
Simpson, James R.
Hill, Raymond R.
Pignatiello, Joseph J.
White, Edward D.
TI Nonlinear screening designs for defense testing: an overview and case
study
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Empirical analysis; definitive screening; design of experiments; wind
tunnel experiments
ID RESPONSE-SURFACE EXPLORATION; FACTORIAL-DESIGNS; 3-LEVEL DESIGNS
AB Recent efforts to improve the statistical rigor of both developmental and operational testing include recommendations to consider second-order screening designs. In this paper, we provide a broad review of screening designs and second-order screening designs. We then consider a real-world wind tunnel experiment case study from the recent published literature and use subject matter expertise to consider the viability of second-order screening design, a recently developed design called the DSD+, to sufficiently screen important factors in complex, nonlinear systems of interest using just a single experimental design.
C1 [Dougherty, Shane] Headquarters US Air Force, Joint Base Andrews NAF Washington, Washington, DC USA.
[Simpson, James R.] JK Analyt, New York, NY USA.
[Hill, Raymond R.] US Air Force, Inst Technol, Dept Operat Sci, Operat Res, Wright Patterson AFB, OH 45433 USA.
[Pignatiello, Joseph J.] US Air Force, Inst Technol, Operat Res, Wright Patterson AFB, OH 45433 USA.
[Pignatiello, Joseph J.] US Air Force, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
[White, Edward D.] US Air Force, Inst Technol, Dept Math & Stat, Stat, Wright Patterson AFB, OH 45433 USA.
RP Hill, RR (reprint author), US Air Force, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
EM rayrhill@gmail.com
NR 22
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2015
VL 12
IS 3
BP 335
EP 342
DI 10.1177/1548512914542523
PG 8
WC Engineering, Multidisciplinary
SC Engineering
GA DA1IT
UT WOS:000367550200010
ER
PT J
AU Hwang, J
Wong, E
AF Hwang, Jane
Wong, Emily
TI Non-healing, non-tender ulcer on shin
SO JOURNAL OF FAMILY PRACTICE
LA English
DT Editorial Material
ID BASAL-CELL CARCINOMA; CHRONIC LEG ULCERS; MALIGNANCY
C1 [Hwang, Jane] San Antonio Uniformed Serv Hlth Educ Consortium, San Antonio, TX USA.
[Wong, Emily] Scott Air Force Base, Dept Dermatol, Scott AFB, IL USA.
RP Hwang, J (reprint author), Kunsan Air Base, PSC 2 Box 205, APO, AP 96264 USA.
EM jane.hwang.1@us.af.mil
NR 8
TC 1
Z9 1
U1 0
U2 0
PU DOWDEN HEALTH MEDIA
PI MONTVALE
PA 110 SUMMIT AVE, MONTVALE, NJ 07645-1712 USA
SN 0094-3509
J9 J FAM PRACTICE
JI J. Fam. Pract.
PD JUL
PY 2015
VL 64
IS 7
BP 421
EP 424
PG 4
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CW6VU
UT WOS:000365137300009
PM 26324960
ER
PT J
AU Nussbaum, L
Morrissey, M
Ritchie, S
AF Nussbaum, Lance
Morrissey, Matthew
Ritchie, Simon
TI Scarring alopecia in a woman with psoriasis
SO JOURNAL OF FAMILY PRACTICE
LA English
DT Editorial Material
ID LICHEN-PLANOPILARIS; UPDATE
C1 [Nussbaum, Lance] Ramstein Air Base, Ramstein Miesenbach, Germany.
[Morrissey, Matthew; Ritchie, Simon] San Antonio Mil Hlth Syst, San Antonio, TX USA.
RP Ritchie, S (reprint author), San Antonio Mil Hlth Syst, 59MDSP-SGO7D,2200 Berquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM simon.ritchie@us.af.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU DOWDEN HEALTH MEDIA
PI MONTVALE
PA 110 SUMMIT AVE, MONTVALE, NJ 07645-1712 USA
SN 0094-3509
J9 J FAM PRACTICE
JI J. Fam. Pract.
PD JUL
PY 2015
VL 64
IS 7
BP E1
EP E3
PG 3
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CW6VU
UT WOS:000365137300001
PM 26324964
ER
PT J
AU Galvagno, SM
Brayanov, J
Corneille, MG
Voscopoulos, CJ
Sordo, S
Ladd, D
Freeman, J
AF Galvagno, Samuel M.
Brayanov, Jordan
Corneille, Michael G.
Voscopoulos, Christopher J.
Sordo, Salvador
Ladd, Diane
Freeman, Jenny
TI Non-invasive respiratory volume monitoring in patients with traumatic
thoracic injuries
SO TRAUMA-ENGLAND
LA English
DT Article
DE Respiratory monitoring; thoracic trauma; rib fractures; impedance
monitoring; non-invasive pulmonary monitoring
ID CARE
AB Background: Respiratory decompensation is common after traumatic thoracic injuries such as multiple rib fractures and pulmonary contusions. A continuous, non-invasive, impedance-based respiratory volume monitor generates right and left tidal volume measurements, reflecting air exchange in the lungs and derives an instantaneous respiratory rate. The feasibility of using unilateral respiratory volume monitor-based tidal impedance measurements to monitor respiratory status in trauma patients is evaluated.
Methods: Three intensive care unit patients with three or more rib fractures following blunt trauma had continuous respiratory volume monitor measurements with a novel non-invasive impedance-based device (ExSpiron, Respiratory Motion Inc., Waltham, MA) and corresponding clinical data to permit analysis. Tidal impedance measurements were collected from both the injured and non-injured sides and converted into bilateral respiratory volume monitor measurements using advanced algorithms.
Results: In Patient 1, following evacuation of a pneumothorax, the respiratory volume monitor showed a significant increase in tidal measurements coupled with a compensatory decrease in tidal measurements on the uninjured side and a decrease in respiratory rate. In Patient 2, tidal measurements were only slightly decreased on both the injured side and uninjured side; respiratory rate remained unchanged. This patient remained stable and required no intervention. Patient 3 demonstrated a sustained decrease in tidal measurements on the injured side that corresponded with radiograph findings and clinical deterioration leading to the need for endotracheal intubation.
Conclusions: The results from these cases demonstrate that respiratory volume monitor can generate unilateral respiratory tidal measurements and respiratory rate in patients with traumatic thoracic injuries. Continuous respiratory volume monitor in patients with thoracic trauma has strong potential for application in the military, aeromedical, and other austere environments where respiratory monitoring is problematic. Future studies to investigate the utility of this technology are warranted.
C1 [Galvagno, Samuel M.] Univ Maryland, Sch Med, Dept Anesthesiol, Baltimore, MD 21201 USA.
[Galvagno, Samuel M.] Univ Maryland, Sch Med, Program Trauma, Ctr Shock Trauma,Div Trauma Anesthesiol, Baltimore, MD 21201 USA.
[Galvagno, Samuel M.] Univ Maryland, Sch Med, Program Trauma, Ctr Shock Trauma,Div Crit Care Med, Baltimore, MD 21201 USA.
[Galvagno, Samuel M.] US Air Force Reserve, Davis Monthan AFB, AZ USA.
[Brayanov, Jordan; Ladd, Diane; Freeman, Jenny] Resp Mot Inc, Waltham, MA 02452 USA.
[Corneille, Michael G.; Sordo, Salvador] Univ Texas Hlth Sci Ctr San Antonio, Dept Surg, San Antonio, TX 78229 USA.
[Voscopoulos, Christopher J.] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Anesthesiol Pain & Perioperat Med, Boston, MA 02115 USA.
[Ladd, Diane] W Virginia Univ, Morgantown, WV 26506 USA.
RP Ladd, D (reprint author), Resp Mot Inc, 411 Waverley Oaks Rd,Bldg 1,Suite 150, Waltham, MA 02452 USA.
EM dladd@respiratorymotion.com
NR 7
TC 2
Z9 2
U1 0
U2 0
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1460-4086
EI 1477-0350
J9 TRAUMA
JI Trauma
PD JUL
PY 2015
VL 17
IS 3
BP 219
EP 223
DI 10.1177/1460408614551977
PG 5
WC Emergency Medicine
SC Emergency Medicine
GA CU8GV
UT WOS:000363780600009
ER
PT J
AU Huie, LM
Fowler, ML
AF Huie, Lauren M.
Fowler, Mark L.
TI Strategies for Information Injection for Networks Estimating Emitter
Location
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID SENSOR NETWORK; DOA ESTIMATION; SYSTEMS; LOCALIZATION; ERRORS
AB This paper considers the problem of emitter location in the presence of an adversary able to inject false information, where both the viewpoints of the adversary and locating network are considered. We begin by developing adversary strategies, which focus on degrading and redirecting the locating network. The locating network uses the time difference of arrival (TDOA) method and estimates the emitter location using both nonlinear least squares (LS) and the robust least median squares (LMS). Specifically, we determine the false sensor position the adversary should inject that maximally impacts the locating network by 1) minimizing the network's accuracy, and 2) redirecting the network's emitter location estimate. Similarly, we formulate a network's strategy for detecting the adversary's injection and develop a detector able to determine its presence under both adversary strategies. We present both theoretical and numerical results illustrating the effectiveness of the developed strategies.
C1 [Huie, Lauren M.] US Air Force, Res Lab, Informat Directorate, Rome, NY 13441 USA.
[Fowler, Mark L.] SUNY Binghamton, Dept Elect & Comp Engn, Binghamton, NY 13902 USA.
RP Huie, LM (reprint author), US Air Force, Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.
EM lauren.huie@us.af.mil; mfowler@binghamton.edu
FU AFOSR LRIR [09RI02COR]
FX This work is supported in part by AFOSR LRIR 09RI02COR.
NR 33
TC 0
Z9 0
U1 2
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUL
PY 2015
VL 51
IS 3
BP 1597
EP 1608
DI 10.1109/TAES.2014.120442
PG 12
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA CS4AA
UT WOS:000362015800002
ER
PT J
AU O'Connor, A
Setlur, P
Devroye, N
AF O'Connor, Alan
Setlur, Pawan
Devroye, Natasha
TI Single-Sensor RF Emitter Localization Based on Multipath Exploitation
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID ALGEBRAIC-SOLUTION; FDOA MEASUREMENTS; LOCATION; DOPPLER; TDOA;
ENVIRONMENTS; SCATTERING; SIGNALS
AB This paper considers the problem of passive localization of a wideband RF emitter by exploiting the multipath interaction of the signal with the environment, as occurs in urban settings. The feasibility of localizing using times of arrival (TOAs) of multipath components is examined. Localization of an emitter with a known waveform in a bounded three-dimensional volume, without prior knowledge of the time of emission, is shown to be possible if there are at least five TOAs corresponding to known propagation paths. The primary contribution is a method to correctly associate measured TOAs with scattering surfaces. This method can cope with some unresolved TOAs, as well as spurious TOA measurements (clutter). Simulations are used to test the effects of scene geometry, clutter, and surface roughness on localization performance.
C1 [O'Connor, Alan] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Setlur, Pawan] Wright State Res Inst, Beavercreek, OH 45431 USA.
[Devroye, Natasha] Univ Illinois, Chicago, IL 60607 USA.
RP O'Connor, A (reprint author), US Air Force, Res Lab, Sensors Directorate, 2241 Av Circle, Wright Patterson AFB, OH 45433 USA.
EM alan.oconnor@ll.mit.edu
FU National Research Council; Air Force Office of Scientific Research
(AFOSR) [FA9550-10-1-0239]
FX A. O'Connor was supported by a National Research Council Postdoctoral
Fellowship held at the Air Force Research Laboratory, Sensors
Directorate. P. Setlur and N. Devroye were partially supported by the
Air Force Office of Scientific Research (AFOSR; Award No.
FA9550-10-1-0239).
NR 36
TC 4
Z9 4
U1 4
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUL
PY 2015
VL 51
IS 3
BP 1635
EP 1651
DI 10.1109/TAES.2015.120807
PG 17
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA CS4AA
UT WOS:000362015800005
ER
PT J
AU Okolo, W
Dogan, A
Blake, W
AF Okolo, Wendy
Dogan, Atilla
Blake, William
TI Effect of Trail Aircraft Trim on Optimum Location in Formation Flight
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID BIRDS
AB Aircraft flight generates vortices that induce nonuniform wind distribution in their wake. A trailing/follower aircraft will experience induced wind components and gradients with various magnitudes and directions, depending on its location relative to the leader. This paper explores two methods of determining the relative location for optimum formation flight, termed the sweet spot. The relative location with the highest lift-to-drag ratio on the follower is denoted as the static sweet spot. In the second method, the trail aircraft is trimmed by adjusting the thrust and control surfaces to maintain its commanded position relative to the lead. The relative location requiring the least thrust is then assigned as the dynamic sweet spot. The results showed that, depending on the trail aircraft size, the static sweet spot might differ from the dynamic sweet spot. The effect of the leader weight and follower size on both static and dynamic sweet spot was also studied. It was discovered that the static and dynamic sweet-spot location changed when the size of the trail aircraft was modified. It was also observed that the static sweet spot remained the same but the dynamic sweet spot changed when the lead aircraft weight was modified.
C1 [Okolo, Wendy; Dogan, Atilla] Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
[Blake, William] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Okolo, W (reprint author), Univ Texas Arlington, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
NR 23
TC 2
Z9 2
U1 0
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD JUL-AUG
PY 2015
VL 52
IS 4
BP 1201
EP 1213
DI 10.2514/1.C032865
PG 13
WC Engineering, Aerospace
SC Engineering
GA CS4JD
UT WOS:000362041200016
ER
PT J
AU Reasor, DA
Bhamidipati, KK
Woolf, RK
AF Reasor, Daniel A., Jr.
Bhamidipati, Keerti K.
Woolf, Reagan K.
TI Numerical Predictions of Static-Pressure-Error Corrections for a
Modified T-38C Aircraft
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID UNSTRUCTURED DYNAMIC MESHES; TRANSONIC FLOW; ALE SCHEMES; DESIGN; TUBE
AB The objective of this work was to highlight modeling considerations for estimating the required static-pressure-error corrections using computational fluid dynamics. This work was performed to complement the U.S. Air Force Test Pilot School activities that used a T-38C aircraft with a previously untested Pitot-static system. Before the flight test, it is highly desirable to have an estimate of how any modifications will affect sensor performance, and to possess the capability to explain any discrepancies from previous test programs. Estimates of this kind are only obtainable via wind-tunnel tests or through modeling and simulation. This work presents the computational fluid dynamics requirements and methodologies needed to estimate the static-pressure-error correction of a T-38C in the subsonic, transonic, and low supersonic regimes. Estimates are validated with flight-test results, and proposed solutions for further reduction of static-pressure error via modifications to the flight-tested Pitot-static-probe geometry are included.
C1 [Reasor, Daniel A., Jr.; Bhamidipati, Keerti K.] US Air Force, Testing Tech Flight, Edwards AFB, CA 93524 USA.
[Woolf, Reagan K.] US Air Force, Performance & Flying Qual Flight, Edwards AFB, CA 93524 USA.
RP Reasor, DA (reprint author), US Air Force, Testing Tech Flight, 412th Test Wing,812th Test Support Squadron, Edwards AFB, CA 93524 USA.
NR 31
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD JUL-AUG
PY 2015
VL 52
IS 4
BP 1326
EP 1335
DI 10.2514/1.C032925
PG 10
WC Engineering, Aerospace
SC Engineering
GA CS4JD
UT WOS:000362041200027
ER
PT J
AU Trelewicz, JR
Longtin, JP
Gouldstone, C
Kennedy, PJ
Donbar, JM
AF Trelewicz, Jason R.
Longtin, Jon P.
Gouldstone, Christopher
Kennedy, Paul J.
Donbar, Jeffrey M.
TI Heat Flux Measurements in a Scramjet Combustor Using Embedded
Direct-Write Sensors
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID THERMAL SPRAY COATINGS; TRIBOLOGICAL APPLICATIONS; HARSH ENVIRONMENTS;
SUPERSONIC-FLOW; GROUND TEST; FABRICATION; FLAMEHOLDER; VALIDATION;
SYSTEMS; FUEL
AB Embedded heat flux sensors fabricated using direct-write technology have been developed and tested within a direct-connect gaseous hydrocarbon-fueled scramjet combustor under Mach 5 flight conditions. The sensors employed a multilayer thermopile architecture fabricated via the additive direct-write thermal spray process, which enables their integration directly onto the components to be tested. The sensors were embedded within a 0.50-mm-thick (0.020-in.-thick) thermal barrier coating on test plugs that were inserted into the tunnel for testing. Fuel equivalence ratios and dynamic pressures were varied from phi = 0.6 to 1.0 and Q = 24 and 48 kPa (500 and 1000 psf), respectively, with increases in the global heat flux found to depend on the tunnel location. Heat flux values ranging from 30 to 75 W/cm(2) (26 to 66 Btu/ft(2) . s) were measured downstream of the cavity flame holder, 20 to 150 W/cm(2) (18 to 132 Btu/ft(2) . s) in the cavity flame holder, and 20 to 40 W/cm(2) (18 to 35 Btu/ft(2) . s) upstream of the flame holder. Direct-write sensors reported heat flux trends that were consistent with separate area-averaged calorimetric measurements, and the local nature of the direct-write sensors enabled the detection of subtle transient phenomena not captured by calorimetry.
C1 [Trelewicz, Jason R.] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
[Longtin, Jon P.] SUNY Stony Brook, Dept Mech Engn, Stony Brook, NY 11794 USA.
[Gouldstone, Christopher] MesoScribe Technol Inc, St James, NY 11780 USA.
[Kennedy, Paul J.; Donbar, Jeffrey M.] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Trelewicz, JR (reprint author), SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
FU U.S. Air Force [FA8650-08-C-2866]; U.S. Air Force Research Laboratory,
Aerospace Systems Directorate, High Speed Systems Division
FX This work was supported by U.S. Air Force contract FA8650-08-C-2866. The
authors gratefully acknowledge the U.S. Air Force Research Laboratory,
Aerospace Systems Directorate, High Speed Systems Division.
NR 38
TC 1
Z9 1
U1 4
U2 14
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD JUL-AUG
PY 2015
VL 31
IS 4
BP 1003
EP 1013
DI 10.2514/1.B35585
PG 11
WC Engineering, Aerospace
SC Engineering
GA CR7PE
UT WOS:000361542000002
ER
PT J
AU Poling, BS
Brown, JL
Heller, ER
Stumpff, B
Beckman, JA
Hilton, AM
AF Poling, B. S.
Brown, J. L.
Heller, E. R.
Stumpff, B.
Beckman, J. A.
Hilton, A. M.
TI Performance of commercial foundry-level AlGaN/GaN HEMTs after hot
electron stressing
SO MICROELECTRONICS RELIABILITY
LA English
DT Article
DE Gallium nitride (GaN); High electron mobility transistors (HEMTs);
Electroluminescence; Hot electron
ID GAN; TRANSISTORS; TEMPERATURE; RELIABILITY; IONIZATION; DEPENDENCE
AB The performance degradation of commercial foundry level GaN HEMTs placed under a constant-power drain voltage step-stress test has been studied. By utilizing electroluminescence measurement techniques to optimize hot electron stress testing conditions (Meneghini, 2012), no significant permanent changes in saturation current (I-dss), transconductance (Gm), and threshold voltage (V-th) can be seen after stress testing of drain voltages from 30 V up to 200 V. We observe little permanent degradation due to hot electron effects in GaN HEMTs at these extreme operating conditions and it is inferred that other considerations, such as key dimensions in channel or peak electric field (Chynoweth, 1958; Zhang and Singh, 2001) [2,3], are more relevant to physics of failure than drain bias alone. Published by Elsevier Ltd.
C1 [Poling, B. S.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Brown, J. L.; Stumpff, B.; Hilton, A. M.] Wyle, Dayton, OH USA.
[Heller, E. R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
[Beckman, J. A.] Southwestern Ohio Council Higher Educ, Dayton, OH USA.
RP Poling, BS (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
FU High Reliability Virtual Electronics Center (HiREV)
FX The authors wish to thank the High Reliability Virtual Electronics
Center (HiREV) for funding and helpful discussions and the Reliability
of Electronics Devices Failure Analysis and Characterization Laboratory
(RED-FALCon) for test support.
NR 13
TC 1
Z9 1
U1 2
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0026-2714
J9 MICROELECTRON RELIAB
JI Microelectron. Reliab.
PD JUL
PY 2015
VL 55
IS 8
BP 1187
EP 1191
DI 10.1016/j.microrel.2015.05.010
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA CQ8OH
UT WOS:000360867200008
ER
PT J
AU Drew, J
Chou, VB
Miller, C
Borg, B
Ingalls, N
Shackelford, S
AF Drew, Jennifer
Chou, Victoria B.
Miller, Catriona
Borg, Bryson
Ingalls, Nichole
Shackelford, Stacy
TI Clearing the Cervical Spine in a War Zone: What Other Injuries Matter?
SO MILITARY MEDICINE
LA English
DT Article
ID BLUNT TRAUMA; DISTRACTING INJURIES; CLINICAL EXAMINATION; RULE
AB Background: Cervical spine clearance requires clinicians to assess the reliability of physical examination based on a patient's mental status and distracting injuries. Distracting injuries have never been clearly defined in military casualties. Methods: Retrospective review was conducted of patients entered into Department of Defense Trauma Registry January 2008 to August 2013, identifying blunt trauma patients with cervical spine injury and Glasgow Coma Score >= 14. Physical examination and radiology results were abstracted from medical records and injury diagnoses were obtained from Department of Defense Trauma Registry. Groups were compared, p-value of < 0.05 was considered significant. Results: A total of 149 patients met study criteria; 20 patients (13%) had a negative clinical examination of the cervical spine. Coexisting injuries identified in patients with negative physical examination included injuries in proximity to the neck (head, thoracic spine, chest, or humerus) in 17 (85%) patients. In 3 patients (15%), coexisting injuries were not in proximity to the neck and included pelvic, femur, and tibia fractures. All patients without coexisting injury (n = 37) had a positive physical examination. Conclusion: Physical examination of multitrauma casualties with neck injury may be unreliable when distracting injuries are present. When no distracting injuries were present, the physical examination was accurate in all patients.
C1 [Drew, Jennifer] Canadian Forces Base Edmonton, Hlth Serv Grp Headquarters, Edmonton, AB T5J 4J5, Canada.
[Chou, Victoria B.; Miller, Catriona; Shackelford, Stacy] Univ Maryland, Med Ctr, R Adams Cowley Shock Trauma Ctr, Ctr Sustainment Trauma & Readiness Skills, Baltimore, MD 21201 USA.
[Borg, Bryson] David Grant Med Ctr, Med Grp 60, Travis AFB, CA 94535 USA.
[Ingalls, Nichole] Mike OCallaghan Fed Med Ctr, Med Grp 99, Nellis AFB, NV 89191 USA.
RP Drew, J (reprint author), Canadian Forces Base Edmonton, Hlth Serv Grp Headquarters, POB 10500 Stn Forces, Edmonton, AB T5J 4J5, Canada.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD JUL
PY 2015
VL 180
IS 7
BP 792
EP 797
DI 10.7205/MILMED-D-14-00635
PG 6
WC Medicine, General & Internal
SC General & Internal Medicine
GA CQ3SU
UT WOS:000360523600022
PM 26126250
ER
PT J
AU Roberts, DA
MacManus, DG
Johnson, RA
Grove, JE
Birch, TJ
Chaplin, RA
AF Roberts, David A.
MacManus, David G.
Johnson, Rudy A.
Grove, James E.
Birch, Trevor J.
Chaplin, Ross A.
TI Passive Attenuation of Modal Cavity Aeroacoustics Under Supersonic and
Transonic Conditions
SO AIAA JOURNAL
LA English
DT Article
ID PRESSURE OSCILLATIONS; MODULATION PROCESS; PLASMA ACTUATORS; FLOW;
SOUND; LOADS
AB Open cavities exposed to a grazing flow can exhibit large pressure fluctuations, which may result in damage to stores or components carried within a weapon bay. This study investigates the use of passive resonant absorbers based on Helmholtz resonators to attenuate the problematic pressure fluctuations that arise in cavity flows, under both transonic (0.80 CO2 + H and CO + HO2 --> CO2 + OH reactions, resulting in a mild third stage ignition for phi = 0.25 conditions. Additional examination of H-2 production and destruction reactions reveals similar reactions occurring in conventional and alternative jet fuels with CO-H-2-O-2 kinetics dominating the final stage oxidation kinetics.
C1 [Oldani, Anna; Min, Kyungwook; Lee, Tonghun] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Valco, Daniel] Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA.
[Edwards, James] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kweon, Chol-Bum] US Army, Res Lab, Aberdeen, MD 21005 USA.
[Allen, Casey] Marquette Univ, Dept Mech Engn, Milwaukee, WI 53233 USA.
RP Lee, T (reprint author), Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
EM tonghun@illinois.edu
RI Kweon, Chol-Bum/G-5425-2016
FU Office of Naval Research [N00014-14-1-0212]; National Science Foundation
[DGE-1144245]
FX The authors gratefully recognize the support of the Office of Naval
Research under Grant N00014-14-1-0212. This material is based upon work
supported by the National Science Foundation Graduate Research
Fellowship Program under Grant DGE-1144245. Finally, the authors would
like to acknowledge Dr. Robert Morris from the Naval Research Laboratory
for his fuel composition analysis work.
NR 23
TC 1
Z9 2
U1 2
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
EI 1520-5029
J9 ENERG FUEL
JI Energy Fuels
PD JUL
PY 2015
VL 29
IS 7
BP 4597
EP 4607
DI 10.1021/acs.energyfuels.5b00917
PG 11
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA CP6VS
UT WOS:000360026900065
ER
PT J
AU Kress, BT
Hudson, MK
Selesnick, RS
Mertens, CJ
Engel, M
AF Kress, B. T.
Hudson, M. K.
Selesnick, R. S.
Mertens, C. J.
Engel, M.
TI Modeling geomagnetic cutoffs for space weather applications
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Geomagnetic cutoffs
ID SOLAR PROTONS; PARTICLE EVENTS; FIELD; RIGIDITY; PENETRATION; RADIATION;
MAGNETOSPHERE; STATION
AB Access of solar and galactic cosmic rays to the Earth's magnetosphere is quantified in terms of geomagnetic cutoff rigidity. Numerically computed grids of cutoff rigidities are used to model cosmic ray flux in Earth's atmosphere and in low Earth orbit. In recent years, the development of more accurate dynamic geomagnetic field models and an increase in computer power have made a real-time data-driven geomagnetic cutoff computation extending over the inner magnetosphere possible. For computational efficiency, numerically computed cutoffs may be scaled to different altitudes and directions of arrival using the known analytic variation of cutoff in a pure dipole magnetic field. This paper is a presentation of numerical techniques developed to compute effective cutoff rigidities for space weather applications. Numerical tests to determine the error associated with scaling vertical cutoff rigidities with altitude in a realistic geomagnetic field model are included. The tests were performed to guide the development of spatial grids for modeling cosmic ray access to the inner magnetosphere and to gain a better understanding of the accuracy of numerically modeled cutoffs.
C1 [Kress, B. T.] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[Kress, B. T.] NOAA, Natl Geophys Data Ctr, Boulder, CO 80303 USA.
[Hudson, M. K.; Engel, M.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Selesnick, R. S.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, Albuquerque, NM USA.
[Mertens, C. J.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Kress, BT (reprint author), Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
EM bkress@northstar.dartmouth.edu
FU National Science Foundation [ATM-0921979, ATM-1023332]; NSF
[AGS-1023339]
FX This work was supported by the National Science Foundation awards
ATM-0921979 and ATM-1023332. Support was also provided by NSF grant
AGS-1023339. The Dartmouth College radiation belt and geomagnetic cutoff
codes used to produce the results presented in this paper are freely
available to the public and can be obtained by contacting the author at
brian.kress@colorado.edu.
NR 29
TC 0
Z9 0
U1 2
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUL
PY 2015
VL 120
IS 7
BP 5694
EP 5702
DI 10.1002/2014JA020899
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CQ1TF
UT WOS:000360381400034
ER
PT J
AU Mirfayzi, SR
Kar, S
Ahmed, H
Krygier, AG
Green, A
Alejo, A
Clarke, R
Freeman, RR
Fuchs, J
Jung, D
Kleinschmidt, A
Morrison, JT
Najmudin, Z
Nakamura, H
Norreys, P
Oliver, M
Roth, M
Vassura, L
Zepf, M
Borghesi, M
AF Mirfayzi, S. R.
Kar, S.
Ahmed, H.
Krygier, A. G.
Green, A.
Alejo, A.
Clarke, R.
Freeman, R. R.
Fuchs, J.
Jung, D.
Kleinschmidt, A.
Morrison, J. T.
Najmudin, Z.
Nakamura, H.
Norreys, P.
Oliver, M.
Roth, M.
Vassura, L.
Zepf, M.
Borghesi, M.
TI Calibration of time of flight detectors using laser-driven neutron
source
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID CHARGED-PARTICLES; CAPTURE THERAPY; FUSION; SCINTILLATORS; SPECTROMETRY
AB Calibration of three scintillators (EJ232Q, BC422Q, and EJ410) in a time-of-flight arrangement using a laser drive-neutron source is presented. The three plastic scintillator detectors were calibrated with gamma insensitive bubble detector spectrometers, which were absolutely calibrated over a wide range of neutron energies ranging from sub-MeV to 20 MeV. A typical set of data obtained simultaneously by the detectors is shown, measuring the neutron spectrum emitted from a petawatt laser irradiated thin foil. (C) 2015 AIP Publishing LLC.
C1 [Mirfayzi, S. R.; Kar, S.; Ahmed, H.; Green, A.; Alejo, A.; Jung, D.; Zepf, M.; Borghesi, M.] Queens Univ Belfast, Ctr Plasma Phys, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Krygier, A. G.; Freeman, R. R.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Clarke, R.; Norreys, P.] Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England.
[Fuchs, J.; Vassura, L.] Ecole Polytech, CNRS, LULI, F-91128 Palaiseau, France.
[Kleinschmidt, A.; Roth, M.] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
[Morrison, J. T.] Air Force Res Lab, Prop Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Najmudin, Z.; Nakamura, H.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Blackett Lab, London SW7 2AZ, England.
[Norreys, P.; Oliver, M.] Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
[Zepf, M.] Helmholtz Inst Jena, D-07743 Jena, Germany.
[Borghesi, M.] ASCR, Inst Phys, ELI Beamlines Project, Prague 18221, Czech Republic.
RP Mirfayzi, SR (reprint author), Queens Univ Belfast, Ctr Plasma Phys, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland.
EM s.kar@qub.ac.uk
RI Kar, Satyabrata/E-5220-2010
FU EPSRC [EP/J002550/1, EP/L002221/1, EP/E035728/1, EP/K022415/1,
EP/J500094/1, EP/I029206/1]; Laserlab Europe [EC-GA 284464]; project ELI
[CZ.1.05/1.1.00/483/02.0061]; project OPVK 3 [CZ.1.07/2.3.00/20.0279]
FX The authors acknowledge funding from EPSRC [No. EP/J002550/1-Career
Acceleration Fellowship held by S. K., Nos. EP/L002221/1, EP/E035728/1,
EP/K022415/1, EP/J500094/1, and EP/I029206/1], Laserlab Europe (No.
EC-GA 284464), projects ELI (Grant No. CZ.1.05/1.1.00/483/02.0061), and
OPVK 3 (Grant No. CZ.1.07/2.3.00/20.0279). Authors also acknowledge the
support of ESG, mechanical, and target fabrication staffs of the Central
Laser Facility, STFC, UK.
NR 29
TC 3
Z9 3
U1 2
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD JUL
PY 2015
VL 86
IS 7
AR 073308
DI 10.1063/1.4923088
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CO1SB
UT WOS:000358934400035
PM 26233373
ER
PT J
AU MacDonald, GA
Henney, CJ
Alfaro, MD
Hernandez, IG
Arge, CN
Lindsey, C
McAteer, RTJ
AF MacDonald, G. A.
Henney, C. J.
Diaz Alfaro, M.
Hernandez, I. Gonzalez
Arge, C. N.
Lindsey, C.
McAteer, R. T. J.
TI ACTIVE REGION MORPHOLOGIES SELECTED FROM NEAR-SIDE HELIOSEISMIC DATA
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona; Sun: helioseismology; sunspots
ID BIPOLAR MAGNETIC REGIONS; FLUX TRANSPORT; FAR-SIDE; SUN; MODEL; FIELDS;
MAPS; HOLOGRAPHY; POLARITY
AB We estimate the morphology of near-side active regions using near-side helioseismology. Active regions from two data sets, Air Force Data Assimilative Photospheric flux Transport synchronic maps and Global Oscillation Network Group near-side helioseismic maps, were matched and their morphologies compared. Our algorithm recognizes 382 helioseismic active regions between 2002 April 25 and 2005 December 31 and matches them to their corresponding magnetic active regions with 100% success. A magnetic active region occupies 30% of the area of its helioseismic signature. Recovered helioseismic tilt angles are in good agreement with magnetic tilt angles. Approximately 20% of helioseismic active regions can be decomposed into leading and trailing polarity. Leading polarity components show no discernible scaling relationship, but trailing magnetic polarity components occupy approximately 25% of the area of the trailing helioseismic component. A nearside phase-magnetic calibration is in close agreement with a previous far-side helioseismic calibration and provides confidence that these morphological relationships can be used with far-side helioseismic data. Including far-side active region morphology in synchronic maps will have implications for coronal magnetic topology predictions and solar wind forecasts.
C1 [MacDonald, G. A.; McAteer, R. T. J.] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
[Henney, C. J.; Arge, C. N.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Diaz Alfaro, M.] Inst Astrofis Canarias, Tenerife, Spain.
[Diaz Alfaro, M.] Univ La Laguna, Dept Astrofis, Tenerife, Spain.
[Hernandez, I. Gonzalez] Natl Opt Astron Observ, Natl Solar Observ, Tucson, AZ 85726 USA.
[Lindsey, C.] Northwest Res Associates, Boulder, CO USA.
RP MacDonald, GA (reprint author), New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
EM gordonm@nmsu.edu
OI Diaz Alfaro, Manuel/0000-0002-4839-872X
FU NSF [1255024]; AFRL Space Scholars Program; NASA Earth and Space Science
Fellowship [NNX14AO13H]; Spanish National Research Plan [AYA2010-17803];
AFRL; Air Force Office of Scientific Research (AFOSR)
FX A large portion of the funding for this research was provided by NSF
Career Grant #1255024. Significant funds were also provided by the AFRL
Space Scholars Program, a program jointly administered by Universities
Space Research Association and the Air Force Research Laboratory. The
writing of this paper was supported by the 2014 NASA Earth and Space
Science Fellowship #NNX14AO13H. Part of this research was supported by
the Spanish National Research Plan under project AYA2010-17803. The
ADAPT model development is supported by AFRL and the Air Force Office of
Scientific Research (AFOSR). The input data utilized by ADAPT is
obtained by NSO/NISP (NSO Integrated Synoptic Program). We thank C.
Lindsey and D. Braun for making a large part of the far-side code
available, which was adapted for near-side in this work. This work
utilizes data obtained by the Global Oscillation Network Group (GONG)
Program, managed by the National Solar Observatory, which is operated by
AURA, Inc. under a cooperative agreement with the National Science
Foundation. The data were acquired by instruments operated by the Big
Bear Solar Observatory, High Altitude Observatory, Learmonth Solar
Observatory, Udaipur Solar Observatory, Instituto de Astrofisica de
Canarias, and Cerro Tololo Interamerican Observatory.
NR 35
TC 2
Z9 2
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JUL 1
PY 2015
VL 807
IS 1
AR 21
DI 10.1088/0004-637X/807/1/21
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CO1VX
UT WOS:000358945200021
ER
PT J
AU Hannan, S
Gallagher, MA
Perrin, AM
AF Hannan, Saiful
Gallagher, Mark A.
Perrin, Anna M.
TI Military Active and Reserve Component Mix: The Grey Space
SO INTERFACES
LA English
DT Article
DE military; allocation; resources; decision support; graphs; demand; part
time; full time; employment
AB The United States Air Force consists of two primary components: regular active and reserves. As a result of different deployment schedules and skill levels of personnel, these components differ in their associated costs and employee abilities. Although active-component service members are full-time employees, the majority of reserve members serve in the military on a part-time basis until activated by volunteering or mobilization. Before retiring from military service, active-component members often transition to the reserve component, resulting in a higher level of experience in these units. This enables the Air Force to retain experienced personnel at relatively lower costs and preserve its operational capability. Military analysts frequently assess policies regarding funding, resource allocation, and the balance between components using the Total Force Enterprise Analytic Framework. The five drivers of this framework are wartime demand and requirements, weapon system inventory, manpower inventory, employment policies, and cost. To simplify the evaluation and communication of component force mix options, we developed a graphical representation of the five-driver framework, which we called the grey space. This approach creates a visual representation of feasible options subject to the trade-off between cost and supply in terms of force structure size and component mix. Our depictions have enabled political constituents to better understand the feasible region. The United States Army and others analyzing the military have also adopted this approach. In this article, we discuss this graphical approach and its applications.
C1 [Hannan, Saiful] Off Secretary Def, Washington, DC 20301 USA.
[Gallagher, Mark A.] US Air Force, Washington, DC 20330 USA.
[Perrin, Anna M.] Michigan State Univ, E Lansing, MI 48824 USA.
RP Hannan, S (reprint author), Off Secretary Def, Washington, DC 20301 USA.
EM saiful.hannan@osd.mil; mark.a.gallagher16.civ@mail.mil; perrina3@msu.edu
NR 5
TC 0
Z9 0
U1 2
U2 8
PU INFORMS
PI CATONSVILLE
PA 5521 RESEARCH PARK DR, SUITE 200, CATONSVILLE, MD 21228 USA
SN 0092-2102
EI 1526-551X
J9 INTERFACES
JI Interfaces
PD JUL-AUG
PY 2015
VL 45
IS 4
BP 283
EP 292
DI 10.1287/inte.2015.0795
PG 10
WC Management; Operations Research & Management Science
SC Business & Economics; Operations Research & Management Science
GA CN5XD
UT WOS:000358505700001
ER
PT J
AU Kim, W
Guo, JP
Hendrickson, J
AF Kim, Wonkyu
Guo, Junpeng
Hendrickson, Joshua
TI Subwavelength metal grating metamaterial for polarization-selective
optical antireflection coating
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID HYPERBOLIC METAMATERIALS; LIGHT TRANSMISSION; SLITS
AB A metamaterial structure consisting of a one-dimensional metal/air-gap subwavelength grating is investigated for optical antireflection for a germanium surface in the infrared regime. For incident light polarized perpendicularly to the metal grating lines, the metamaterial exhibits effective dielectric properties, and the Fabry-Perot-like resonance results in the elimination of the reflection and the enhancement of optical transmission. It is found that the subwavelength grating metamaterial antireflection structure does not require a deepsubwavelength grating period, which is advantageous for device fabrication. Optical transmittance as high as 93.4% with complete elimination of the reflection is shown in the midwave infrared range. (C) 2015 Optical Society of America
C1 [Kim, Wonkyu; Guo, Junpeng] Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA.
[Hendrickson, Joshua] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Guo, JP (reprint author), Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA.
EM guoj@uah.edu
FU Alabama Graduate Research Scholars Program; U.S. Air Force Office of
Scientific Research (AFOSR) under LRIR [12RY05COR, 15RYCOR159]
FX W. Kim acknowledges support from the Alabama Graduate Research Scholars
Program. J. Hendrickson acknowledges the support from the U.S. Air Force
Office of Scientific Research (AFOSR) under LRIR nos. 12RY05COR and
15RYCOR159.
NR 22
TC 0
Z9 0
U1 2
U2 20
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD JUL 1
PY 2015
VL 32
IS 7
BP 1392
EP 1398
DI 10.1364/JOSAB.32.001392
PG 7
WC Optics
SC Optics
GA CN9RQ
UT WOS:000358787000018
ER
PT J
AU Sukharev, M
Day, PN
Pachter, R
AF Sukharev, Maxim
Day, Paul N.
Pachter, Ruth
TI Optical Response of Hybrid Plasmon-Exciton Nanomaterials in the Presence
of Overlapping Resonances
SO ACS PHOTONICS
LA English
DT Article
DE exciton-plasmon coupling; surface plasmons; Fano resonance
ID FANO RESONANCES; OPTOELECTRONIC DEVICES; LIGHT; NANOSTRUCTURES; GEOMETRY
AB We consider a hybrid plasmon-exciton system comprising a resonant molecular subsystem and three Au wires supporting a dipole mode that can be coupled to a dark mode in controllable fashion by variation of a symmetry parameter. The physics of such a system under strong coupling conditions is examined in detail. It is shown that if two wires supporting the dark mode are covered with molecular layers, the system exhibits four resonant modes for a strong coupling regime due to asymmetry and lifted degeneracy of the molecular state in this case, while upon having molecular aggregates covering the top wire with a dipolar mode, three resonant modes appear. Pump probe simulations are performed to scrutinize the quantum dynamics and find possible ways to control plasmon-exciton materials. It is demonstrated that one can design resonances when excited by femtosecond lasers. hybrid nanomaterials with highly pronounced Fano-type resonances when excited by femtosecond lasers.
C1 [Sukharev, Maxim] Arizona State Univ, Coll Letters & Sci, Sci & Math Fac, Mesa, AZ 85212 USA.
[Day, Paul N.; Pachter, Ruth] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Sukharev, M (reprint author), Arizona State Univ, Coll Letters & Sci, Sci & Math Fac, Mesa, AZ 85212 USA.
EM maxim.sukharev@asu.edu; ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research (Summer Faculty Fellowship)
FX The authors acknowledge support from the Air Force Office of Scientific
Research (Summer Faculty Fellowship 2013).
NR 26
TC 3
Z9 3
U1 5
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2330-4022
J9 ACS PHOTONICS
JI ACS Photonics
PD JUL
PY 2015
VL 2
IS 7
BP 935
EP 941
DI 10.1021/acsphotonics.5b00146
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics; Physics, Applied; Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Optics; Physics
GA CN1OC
UT WOS:000358188300021
ER
PT J
AU Curtis, JG
Dossett, J
Prihoda, TJ
Teixeira, EC
AF Curtis, Joseph G.
Dossett, Jon
Prihoda, Thomas J.
Teixeira, Erica C.
TI Effect of Bonding Agent Application Method on Titanium-Ceramic Bond
Strength
SO JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
LA English
DT Article
DE Analysis of variance; dental porcelain; materials testing; metal ceramic
alloys; microscopy; electron; scanning; titanium
ID COMMERCIALLY PURE TITANIUM; LOW-FUSING PORCELAIN; FIXED PARTIAL
DENTURES; 3-YEAR FOLLOW-UP; DENTAL PORCELAIN; ALLOY; METAL;
RESTORATIONS; GOLD; ADHESION
AB PurposeAlthough milled titanium may be used as a substructure in fixed and implant prosthodontics, the application of the veneering porcelain presents particular challenges compared to traditional alloys. To address these challenges, some Ti ceramic systems incorporate the application of a bonding agent prior to the opaque layer. Vita Titankeramik's bonding agent is available as a powder, paste, and spray-on formulation. We examined the effect of these three application methods on the bond strength.
Materials and MethodsFour titanium bars were milled from each of 11 wafers cut from grade II Ti using the Kavo Everest milling unit and a custom-designed milling toolpath. An experienced technician prepared the 25 x 3 x 0.5 mm(3) metal bars and applied bonding agent using one of three application methods, and then applied opaque, dentin, and enamel porcelains according to manufacturer's instructions to a 8 x 3 x 1 mm(3) porcelain. A control group received no bonding agent prior to porcelain application. The four groups (n = 11) were blindly tested for differences in bond strength using a universal testing machine in a three-point bend test configuration, based on ISO 9693-1:2012.
ResultsThe average (SD) bond strengths for the control, powder, paste, and spray-on groups, respectively, were: 24.8 (2.6), 24.6 (2.6), 25.3 (4.0), and 24.1 (3.9) MPa. One-way ANOVA and Tukey's multiple comparison tests were performed between all groups. There were no statistically significant differences among groups (p = 0.951).
ConclusionTitanium-porcelain bond strength was not affected by the use of a bonding agent or its application method when tested by ISO 9693-1 standard.
C1 [Curtis, Joseph G.] US Air Force, Dept Prosthodont, Washington, DC 20330 USA.
[Dossett, Jon] US Air Force Dent Evaluat & Consultat Serv, San Antonio, TX USA.
[Prihoda, Thomas J.] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
[Teixeira, Erica C.] Univ Iowa, Dept Operat Dent, Coll Dent, Iowa City, IA 52242 USA.
[Teixeira, Erica C.] Univ Iowa, Dept Operat Dent, Dent Clin, Iowa City, IA 52242 USA.
RP Teixeira, EC (reprint author), Univ Iowa, Dept Operat Dent, Coll Dent, 229 Dent Sci Bldg S, Iowa City, IA 52242 USA.
EM Erica-teixeira@uiowa.edu
NR 62
TC 0
Z9 0
U1 2
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1059-941X
EI 1532-849X
J9 J PROSTHODONT
JI J. Prosthodont.
PD JUL
PY 2015
VL 24
IS 5
BP 394
EP 400
DI 10.1111/jopr.12234
PG 7
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA CN4CK
UT WOS:000358376400008
PM 25314910
ER
PT J
AU Kyle, BG
AF Kyle, Brent G.
TI The Lewd, the Rude, and the Nasty: A Study of Thick Concepts in Ethics
SO PHILOSOPHICAL QUARTERLY
LA English
DT Book Review
C1 [Kyle, Brent G.] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Kyle, BG (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
EM bgk5@cornell.edu
NR 3
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0031-8094
EI 1467-9213
J9 PHILOS QUART
JI Philos. Q.
PD JUL
PY 2015
VL 65
IS 260
BP 576
EP 582
DI 10.1093/pq/pqv018
PG 7
WC Philosophy
SC Philosophy
GA CN1KP
UT WOS:000358179200020
ER
PT J
AU Stamp, J
AF Stamp, Jeffrey
TI Aero-Static Warfare: A Brief Survey of Ballooning in
Mid-nineteenth-century Siege Warfare
SO JOURNAL OF MILITARY HISTORY
LA English
DT Article
AB Several nations experimented with military ballooning in the mid-nineteenth century, despite limitations such as lack of controllability. The key factor in whether or not the belligerents perceived ballooning as valuable was the type of warfare involved. When balloons were used in static warfare, such as siege conditions, their usefulness usually encouraged further experimentation. The American Civil War draws some stark contrasts between what balloons could do during static warfare, such as the siege of Island No. 10, and what they could not do in fluid combat, as in the failure at First Bull Run. Later, Brazil employed former Union aeronauts during the siege of Humaita in Paraguay, following which the French pioneered balloon "air mail" from besieged Paris during the Franco-Prussian War. Enemy efforts to defeat ballooning included Prussian invention of what may be the world's first purpose-built anti-aircraft gun, making the point that if an enemy thinks an innovation is valuable, then it is.
C1 [Stamp, Jeffrey] US Air Force Acad, Hist, Colorado Springs, CO 80840 USA.
NR 17
TC 0
Z9 0
U1 0
U2 0
PU SOC MILITARY HISTORY
PI LEXINGTON
PA C/O VIRGINIA MILITARY INST, GEORGE C MARSHALL LIBRARY, LEXINGTON, VA
24450-1600 USA
SN 0899-3718
EI 1543-7795
J9 J MILITARY HIST
JI J. Mil. Hist.
PD JUL
PY 2015
VL 79
IS 3
BP 767
EP 782
PG 16
WC History
SC History
GA CM6ZU
UT WOS:000357841000007
ER
PT J
AU Burt, JM
Josyula, E
AF Burt, Jonathan M.
Josyula, Eswar
TI Global Sensitivity Analysis and Uncertainty Quantification for a
Hypersonic Shock Interaction Flow
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article
ID SIMULATION; DSMC
AB Hypersonic gas flows over concentric double-cone configurations are commonly used to investigate shock-shock and shock wave/boundary-layer interaction phenomena, and are characterized by the formation of interacting flow structures that are highly sensitive to models used in flow simulation. The work presented here is intended to clarify the influence of several modeling parameters and approximations on simulation output quantities through a more general and systematic approach than has previously been employed for this type of flow, with the ultimate goal of improved model validation for simulation of hypersonic shock interactions. Global sensitivity analysis and uncertainty quantification techniques are integrated with a direct simulation Monte Carlo gas flow simulation code, and a large number of these Monte Carlo simulations are performed for a representative hypersonic double-cone flow. Aleatory and epistemic uncertainties are considered in sensitivity analysis/uncertainty quantification calculations, both independently and in combination, through a variety of probabilistic sampling procedures. These procedures include a novel uncertainty quantification technique that combines elements of importance sampling sensitivity analysis with Latin hypercube sampling, as an efficient surrogate-free means of simultaneously considering mixed uncertainty types. Following a strong engineering interest in surface heating augmentation due to hypersonic shock wave/boundary-layer interaction, this paper focuses on surface heat flux at a shock impingement point as an output quantity in sensitivity analysis/uncertainty quantification calculations; other output quantities of interest include impingement point pressure and the integrated force and heat transfer rate over the model surface.
C1 [Burt, Jonathan M.; Josyula, Eswar] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Burt, JM (reprint author), Ohio Aerosp Inst, 22800 Cedar Point Rd, Cleveland, OH 44142 USA.
EM jonathanburt@oai.org
NR 40
TC 3
Z9 3
U1 1
U2 10
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
EI 1533-6808
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD JUL
PY 2015
VL 29
IS 3
BP 439
EP 449
DI 10.2514/1.T4368
PG 11
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA CM8HR
UT WOS:000357940400002
ER
PT J
AU McLean, DE
Meyers, EJ
Guillory, VL
Vandewalle, KS
AF McLean, D. E.
Meyers, E. J.
Guillory, V. L.
Vandewalle, K. S.
TI Enamel Bond Strength of New Universal Adhesive Bonding Agents
SO OPERATIVE DENTISTRY
LA English
DT Article
ID SELF-ETCH ADHESIVES; CLINICAL EFFECTIVENESS; WATER DEGRADATION; DENTIN
AB Purpose: Universal bonding agents have been introduced for use as self-etch or etch-andrinse adhesives depending on the dental substrate and clinician's preference. The purpose of this study was to evaluate the shear bond strength (SBS) of composite to enamel using universal adhesives compared to a self-etch adhesive when applied in self-etch and etchand- rinse modes over time.
Methods and Materials: Extracted human third molars were used to create 120 enamel specimens. The specimens were ground flat and randomly divided into three groups: two universal adhesives and one self-etch adhesive. Each group was then subdivided, with half the specimens bonded in self-etch mode and half in etch-and-rinse mode. The adhesives were applied as per manufacturers' instructions, and composite was bonded using a standardized mold and cured incrementally. The groups were further divided into two subgroups with 10 specimens each. One subgroup was stored for 24 hours and the second for six months in 37 degrees C distilled water and tested in shear. Failure mode was also determined for each specimen.
Results: A three-way analysis of variance (ANOVA) found a significant difference between groups based on bonding agent (p<0.001) and surface treatment (p<0.001) but not on time (p=0.943), with no significant interaction (p>0.05). Clearfil SE in etch-and-rinse and selfetch modes had more mixed fractures than either universal adhesive in either mode.
Conclusions: Etching enamel significantly increased the SBS of composite to enamel. Clearfil SE had significantly greater bond strength to enamel than either universal adhesive, which were not significantly different fromeach other.
C1 [McLean, D. E.] CFB Trenton, Royal Canadian Dent Corps, Astra, ON, Canada.
[Meyers, E. J.] US Air Force, Gen Dent, San Antonio, TX USA.
[Guillory, V. L.] US Air Force, Prosthodont, San Antonio, TX USA.
[Vandewalle, K. S.] US Air Force, Gen Dent, Lackland AFB, TX USA.
RP McLean, DE (reprint author), Yukon St, Astra, ON K0K 3W0, Canada.
EM deidra.mclean@forces.gc.ca
FU 59th Clinical Research Training Division, Joint Base San Antonio -
Lackland, TX
FX Funding for the study was provided by the 59th Clinical Research
Training Division, Joint Base San Antonio - Lackland, TX.
NR 23
TC 8
Z9 8
U1 1
U2 5
PU OPERATIVE DENTISTRY INC
PI INDIANAPOLIS
PA INDIANA UNIV SCHOOL DENTISTRY, ROOM S411, 1121 WEST MICHIGAN ST,
INDIANAPOLIS, IN 46202-5186 USA
SN 0361-7734
EI 1559-2863
J9 OPER DENT
JI Oper. Dent.
PD JUL-AUG
PY 2015
VL 40
IS 4
BP 410
EP 417
DI 10.2341/13-287-L
PG 8
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA CM7KI
UT WOS:000357870500010
PM 25575201
ER
PT J
AU Kowalski, PC
Belcher, DC
Keltner, NL
Dowben, JS
AF Kowalski, Peter C.
Belcher, David C.
Keltner, Norman L.
Dowben, Jonathan S.
TI Huntington's Disease
SO PERSPECTIVES IN PSYCHIATRIC CARE
LA English
DT Article
C1 [Belcher, David C.] US Air Force, Dept Psychiat, San Antonio, TX USA.
[Keltner, Norman L.] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL USA.
[Dowben, Jonathan S.] Brooke Army Med Ctr, Pediat & Behav Hlth Serv, San Antonio, TX USA.
EM normankeltner@gmail.com
NR 8
TC 0
Z9 0
U1 1
U2 6
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0031-5990
EI 1744-6163
J9 PERSPECT PSYCHIATR C
JI Perspect. Psychiatr. Care
PD JUL
PY 2015
VL 51
IS 3
BP 157
EP 161
DI 10.1111/ppc.12121
PG 5
WC Nursing; Psychiatry
SC Nursing; Psychiatry
GA CM9GW
UT WOS:000358016700002
PM 26010510
ER
PT J
AU Look, DC
Leedy, KD
AF Look, D. C.
Leedy, K. D.
TI Optical measurements and mapping in Ga- and Al-doped ZnO and Sn-doped
In2O3
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article
DE ellipsometry; Hall effect; indium tin oxide; In2O3; ZnO
AB Hall-effect/conductivity measurements in TCO materials such as Ga-doped ZnO (GZO), Al-doped ZnO (AZO), and Sn-doped In2O3 (ITO) determine Hall mobility mu(H) and sheet carrier concentration n(s) directly by measurements of current, voltage, and magnetic field. If thickness d is known, then n(s) can be converted into volume concentration n = n(s)/d. Optical measurements, on the other hand, determine analogous quantities mu(opt) and n(opt) indirectly, usually by invoking the Drude model of the dielectric constant. Here we compare mu(opt) and n(opt) obtained by Drude analysis of reflection, transmission, and spectroscopic-ellipsometry (SE) measurements, with mu(H) and n. Although reasonably good agreement between Hall effect and optical parameters can be obtained with all of these techniques, SE is especially attractive for non-destructive, high-density mapping of mu and n. Moreover, we can use degenerate scattering theory to convert maps of mu and n into maps of donor and acceptor concentration. This new mapping methodology is applied to GZO and ITO. (C) 2015 WILEY - VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Look, D. C.] Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
[Look, D. C.] Wyle Labs Inc, Dayton, OH 45431 USA.
[Look, D. C.; Leedy, K. D.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Look, DC (reprint author), Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
EM david.look@wright.edu
FU DOE [DE-FG02-07ER46389]; AFOSR [FA9550-10-1-0079]; NSF [1305193]; AFRL
[HC1047-05-D-4005]; AFOSR lab task [14RY07COR]
FX We wish to thank T.A. Cooper and W. Rice for technical assistance and A.
Keifer for helpful discussions. Support is gratefully acknowledged from
the following sources: DOE grant DE-FG02-07ER46389 (R. Kortan), AFOSR
grant FA9550-10-1-0079 (K. Goretta), NSF award no. 1305193 (C. Ying),
AFRL contract no. HC1047-05-D-4005 (D. Tomich), and AFOSR lab task
14RY07COR (G. Pomrenke).
NR 15
TC 2
Z9 2
U1 5
U2 28
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1862-6300
EI 1862-6319
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD JUL
PY 2015
VL 212
IS 7
BP 1427
EP 1432
DI 10.1002/pssa.201532020
PG 6
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA CM4UA
UT WOS:000357679200003
ER
PT J
AU Senseney, CT
Grasmick, J
Mooney, MA
AF Senseney, Christopher T.
Grasmick, Jacob
Mooney, Michael A.
TI Sensitivity of lightweight deflectometer deflections to layer stiffness
via finite element analysis
SO CANADIAN GEOTECHNICAL JOURNAL
LA English
DT Article
DE finite element method; lightweight deflectometer; elastic modulus;
nondestructive testing; flexible pavement
ID FALLING-WEIGHT DEFLECTOMETER; MODULUS
AB A dynamic finite element (FE) model of lightweight deflectometer (LWD) loading on a two-layer soil system, validated with an analytical solution and experimental data, is presented. Peak dynamic FE vertical deflections can be substantially different (almost always smaller) than FE static deflections. The numerically simulated measurement depth of the LWD center sensor is found to be 2-2.5 times the plate diameter, deeper than other experimental studies. Using the FE model, we conduct a sensitivity analysis of peak vertical deflections to the top layer Young's modulus and underlying Young's modulus of two-layer systems. Peak deflections from the center sensor are found to be more sensitive to the top layer Young's modulus while peak deflections at radial offsets are found to be more sensitive to the underlying layer Young's modulus. Sensitivities of layer moduli to FE deflections offer guidance in selecting weighting factors for the inverse solver in an LWD back-calculation procedure.
C1 [Senseney, Christopher T.] US Air Force Acad, Dept Civil & Environm Engn, Usafa, CO 80841 USA.
[Grasmick, Jacob; Mooney, Michael A.] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
RP Senseney, CT (reprint author), US Air Force Acad, Dept Civil & Environm Engn, Usafa, CO 80841 USA.
EM christopher.senseney@usafa.edu
NR 21
TC 3
Z9 3
U1 1
U2 5
PU CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
PI OTTAWA
PA 65 AURIGA DR, SUITE 203, OTTAWA, ON K2E 7W6, CANADA
SN 0008-3674
EI 1208-6010
J9 CAN GEOTECH J
JI Can. Geotech. J.
PD JUL
PY 2015
VL 52
IS 7
BP 961
EP 970
DI 10.1139/cgj-2014-0040
PG 10
WC Engineering, Geological; Geosciences, Multidisciplinary
SC Engineering; Geology
GA CL7FE
UT WOS:000357137100010
ER
PT J
AU Edwards, AH
Barnaby, HJ
Campbell, KA
Kozicki, MN
Liu, W
Marinella, MJ
AF Edwards, Arthur H.
Barnaby, Hugh J.
Campbell, Kristy A.
Kozicki, Michael N.
Liu, Wei
Marinella, Matthew J.
TI Reconfigurable Memristive Device Technologies
SO PROCEEDINGS OF THE IEEE
LA English
DT Article
DE Memristor; radiation effects; ReRAM; 3-D integration
ID PHASE-CHANGE MEMORY; RANDOM-ACCESS MEMORY; RESISTIVE-SWITCHING MEMORY;
INDUCED CRYSTALLIZATION PHENOMENA; PROGRAMMABLE METALLIZATION CELLS;
SOLID-ELECTROLYTE MEMORY; DRIVEN ION MIGRATION; GETE-BASED ALLOYS;
CHALCOGENIDE GLASSES; NONVOLATILE MEMORY
AB In this paper, we present a review of the state of the art in memristor technologies. Along with ionic conducting devices [i.e., conductive bridging random access memory (CBRAM)], we include phase change, and organic/organo-metallic technologies, and we review the most recent advances in oxide-based memristor technologies. We present progress on 3-D integration techniques, and we discuss the behavior of more mature memristive technologies in extreme environments.
C1 [Edwards, Arthur H.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Barnaby, Hugh J.; Kozicki, Michael N.] Arizona State Univ, Dept Elect Comp & Energy Engn, Mesa, AZ 85281 USA.
[Campbell, Kristy A.] Boise State Univ, Dept Elect & Comp Engn, Boise, ID 83725 USA.
[Liu, Wei] Univ Michigan, Dept Elect Engn, Ann Arbor, MI 48109 USA.
[Marinella, Matthew J.] Sandia Natl Labs, Adv Semicond Device R&D, Albuquerque, NM 87185 USA.
RP Edwards, AH (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM Arthur.Edwards@us.af.mil; hbarnaby@asu.edu; KrisCampbell@boisestate.edu;
michael.kozicki@asu.edu; wluee@umich.edu; matthew.marinella@sandia.gov
FU U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; Defense Threat Reduction Agency [HDTRA1-11-1-0055];
Air Force Research Laboratory [Det 8/RVKVE, FA9452-13-1-0288]; U.S. Air
Force Office of Scientific Research, DEPSCoR [FA9550-07-1-0546]; U.S.
Air Force Research Laboratory [FA9453-08-2-0252]
FX Sandia National Laboratories is a multiprogram laboratory managed and
operated by Sandia Corporation, a wholly owned subsidiary of Lockheed
Martin Corporation, for the U.S. Department of Energy's National Nuclear
Security Administration under Contract DE-AC04-94AL85000. This work was
supported in part by the Defense Threat Reduction Agency under Grant
HDTRA1-11-1-0055 and the Air Force Research Laboratory Det 8/RVKVE under
Grant FA9452-13-1-0288; and in part by the U.S. Air Force Office of
Scientific Research, DEPSCoR, under Grant FA9550-07-1-0546 and the U.S.
Air Force Research Laboratory under Grant FA9453-08-2-0252.
NR 231
TC 9
Z9 9
U1 13
U2 95
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9219
EI 1558-2256
J9 P IEEE
JI Proc. IEEE
PD JUL
PY 2015
VL 103
IS 7
SI SI
BP 1004
EP 1033
DI 10.1109/JPROC.2015.2441752
PG 30
WC Engineering, Electrical & Electronic
SC Engineering
GA CL2WE
UT WOS:000356806900003
ER
PT J
AU Murray, V
Pattichis, M
Llamocca, D
Lyke, J
AF Murray, Victor
Pattichis, Marios
Llamocca, Daniel
Lyke, James
TI Field-Programmable Wiring Systems
SO PROCEEDINGS OF THE IEEE
LA English
DT Article
DE Adaptive wiring panel (AWP); field-programmable wiring systems;
reconfigurable manifold; self-healing circuits
ID MULTI-FPGA SYSTEMS; GATE ARRAYS; DESIGN; ARCHITECTURE; INTERCONNECT;
PANELS; TREES; RF
AB Field-programmable wiring systems refer to methods and hardware that can maintain the interconnection of components of different types. Generally, field-programmable wiring systems support the use of multidomain fabrics that can be used to route analog, power, digital signals, optical, microwave signals, etc. This paper reviews fundamental concepts associated with the practical implementation of field-programmable wiring systems. The paper also provides different implementation examples and discusses a list of challenges and recommendations for future work in this area.
C1 [Murray, Victor] Univ Ingn & Tecnol, Dept Elect Engn, Lima 2221, Peru.
[Murray, Victor; Pattichis, Marios] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
[Llamocca, Daniel] Oakland Univ, Dept Elect & Comp Engn, Rochester, MI 48309 USA.
[Lyke, James] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
RP Murray, V (reprint author), Univ Ingn & Tecnol, Dept Elect Engn, Lima 2221, Peru.
EM vmurray@ieee.org; pattichi@unm.edu; llamocca@oakland.edu;
spaceelectronics@kirtland.af.mil
OI Llamocca, Daniel/0000-0003-1301-3655
NR 69
TC 1
Z9 1
U1 2
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9219
EI 1558-2256
J9 P IEEE
JI Proc. IEEE
PD JUL
PY 2015
VL 103
IS 7
SI SI
BP 1159
EP 1180
DI 10.1109/JPROC.2015.2432123
PG 22
WC Engineering, Electrical & Electronic
SC Engineering
GA CL2WE
UT WOS:000356806900010
ER
PT J
AU Sorokulova, I
Olsen, E
Vodyanoy, V
AF Sorokulova, Iryna
Olsen, Eric
Vodyanoy, Vitaly
TI Biopolymers for sample collection, protection, and preservation
SO APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
LA English
DT Review
DE Biopolymer; Acacia gum; Trehalose; Water; Soil; Air; Pathogens
ID INTRACELLULAR TREHALOSE; STORAGE STABILITY; CELLS; RESISTANCE; DNA;
SURVIVAL; EXTRACTION; BACTERIA; STRESS; GUMS
AB One of the principal challenges in the collection of biological samples from air, water, and soil matrices is that the target agents are not stable enough to be transferred from the collection point to the laboratory of choice without experiencing significant degradation and loss of viability. At present, there is no method to transport biological samples over considerable distances safely, efficiently, and cost-effectively without the use of ice or refrigeration. Current techniques of protection and preservation of biological materials have serious drawbacks. Many known techniques of preservation cause structural damages, so that biological materials lose their structural integrity and viability. We review applications of a novel bacterial preservation process, which is nontoxic and water soluble and allows for the storage of samples without refrigeration. The method is capable of protecting the biological sample from the effects of environment for extended periods of time and then allows for the easy release of these collected biological materials from the protective medium without structural or DNA damage. Strategies for sample collection, preservation, and shipment of bacterial, viral samples are described. The water-soluble polymer is used to immobilize the biological material by replacing the water molecules within the sample with molecules of the biopolymer. The cured polymer results in a solid protective film that is stable to many organic solvents, but quickly removed by the application of the water-based solution. The process of immobilization does not require the use of any additives, accelerators, or plastifiers and does not involve high temperature or radiation to promote polymerization.
C1 [Sorokulova, Iryna; Vodyanoy, Vitaly] Dept Anat Physiol & Pharmacol, Auburn, AL 36849 USA.
[Olsen, Eric] US Air Force Sch Aerosp Med, Epidemiol Lab, Wright Patterson Air Force Base, Dayton, OH 45433 USA.
RP Vodyanoy, V (reprint author), Dept Anat Physiol & Pharmacol, Auburn, AL 36849 USA.
EM vodyavi@auburn.edu
OI Vodyanoy, Vitaly/0000-0003-3092-6245
FU Air Force CRADA grant [13-268-SG-C13016]
FX This study was supported by Air Force CRADA grant 13-268-SG-C13016. The
views expressed in this article are those of the authors and do not
reflect the official policy or position of the United States Air Force,
Department of Defense, or the US Government.
NR 51
TC 1
Z9 1
U1 5
U2 34
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0175-7598
EI 1432-0614
J9 APPL MICROBIOL BIOT
JI Appl. Microbiol. Biotechnol.
PD JUL
PY 2015
VL 99
IS 13
BP 5397
EP 5406
DI 10.1007/s00253-015-6681-3
PG 10
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA CL2VV
UT WOS:000356805600004
PM 25982001
ER
PT J
AU Weiss, A
Baldwin, M
Erwin, RS
Kolmanovsky, I
AF Weiss, Avishai
Baldwin, Morgan
Erwin, Richard Scott
Kolmanovsky, Ilya
TI Model Predictive Control for Spacecraft Rendezvous and Docking:
Strategies for Handling Constraints and Case Studies
SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
LA English
DT Article
DE Constraints; model predictive control; obstacle avoidance; rendezvous
and docking; spacecraft control
ID TRAJECTORIES; ALGORITHM; GUIDANCE; SYSTEM
AB This paper presents a strategy and case studies of spacecraft relative motion guidance and control based on the application of linear quadratic model predictive control (MPC) with dynamically reconfigurable constraints. The controller is designed to transition between the MPC guidance during a spacecraft rendezvous phase and MPC guidance during a spacecraft docking phase, with each phase having distinct requirements, constraints, and sampling rates. Obstacle avoidance is considered in the rendezvous phase, while a line-of-sight cone constraint, bandwidth constraints on the spacecraft attitude control system, and exhaust plume direction constraints are addressed during the docking phase. The MPC controller is demonstrated in simulation studies using a nonlinear model of spacecraft orbital motion. The implementation uses estimates of spacecraft states derived from relative angle and range measurements, and is robust to estimator dynamics and measurement noise.
C1 [Weiss, Avishai; Kolmanovsky, Ilya] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Baldwin, Morgan; Erwin, Richard Scott] Air Force Res Lab, Space Vehicle Directorate, Albuquerque, NM 87116 USA.
EM avishai@umich.edu; afrl.rvsv@kirtland.af.mil; ilya@umich.edu
FU American Society for Engineering Education through the Air Force Summer
Faculty Fellow Program; National Science Foundation through the
University of Michigan, Ann Arbor, MI, USA, [1130160]
FX This work was supported in part by the American Society for Engineering
Education through the Air Force Summer Faculty Fellow Program and in
part by the National Science Foundation through the University of
Michigan, Ann Arbor, MI, USA, under Award 1130160. Recommended by
Associate Editor M. Mattei.
NR 28
TC 4
Z9 6
U1 4
U2 24
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1063-6536
EI 1558-0865
J9 IEEE T CONTR SYST T
JI IEEE Trans. Control Syst. Technol.
PD JUL
PY 2015
VL 23
IS 4
BP 1638
EP 1647
DI 10.1109/TCST.2014.2379639
PG 10
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA CK8XO
UT WOS:000356523600034
ER
PT J
AU Rowan, AB
Travis, WJ
Shwalb, DA
Isler, WC
Park, J
Kimura, J
AF Rowan, Anderson B.
Travis, Wendy J.
Shwalb, David A.
Isler, William C.
Park, Jisuk
Kimura, Jennifer
TI Postdeployment Psychological Health and Interpersonal Problems Among Air
Force Mental Health Personnel
SO MILITARY PSYCHOLOGY
LA English
DT Article
DE mental health personnel; military; postdeployment; posttraumatic stress;
psychological health
ID POSTTRAUMATIC-STRESS-DISORDER; MILITARY MEDICAL PERSONNEL; DEPLOYMENT;
IRAQ; AFGHANISTAN; DEPRESSION; CARE; PROFESSIONALS; VETERANS; ALCOHOL
AB This study is one of the first to use validated screening measures to examine the rates of self-reported mental health and interpersonal problems following deployment of military mental health personnel (MMHP). Research has examined the impact of deployment on military personnel finding 10.2% to 29.0% screen positive for at least one mental health problem. However, little is known about impacts of deployment among MMHP. Utilizing health data collected three to twelve months post-deployment from a sample of 759 Air Force MMHP, this study examined rates of positive screens for psychological health or interpersonal problems, subsequent confirmation of positive screens by a medical provider upon examination, and the demographic characteristics associated with psychological health or interpersonal problems. The study found 13.9% screened positive for "possible or probable PTSD," 4.6% for depressive symptoms, 3.9% for alcohol problems, and 12.6% for interpersonal problems. In total, nearly 26% screened positive for one or more psychological or interpersonal problem. Of those who screened positive, 48.5% of depressive problems, 36.0% of PTSD, 20.0% of alcohol problems and 29.7% of interpersonal problems were confirmed upon subsequent examination by a medical provider. Those who screened positive were more likely to be (a) female, (b) separated, widowed, or divorced, (c) a mental health nurse or psychiatric nurse practitioner, and (d) deployed to Iraq or Afghanistan. The significance, limitations, and implications of the results, along with recommendations for future research are discussed.
C1 [Rowan, Anderson B.] Royal Air Force Lakenheath, US Air Force, Dept Def, Brandon, Suffolk, England.
[Travis, Wendy J.] US Air Force Acad, US Air Force, Dept Def, Colorado Springs, CO 80840 USA.
[Shwalb, David A.] US Air Force, Dept Def, Andersen AFB, GU USA.
[Isler, William C.] US Air Force, Dept Def, San Antonio, TX USA.
[Park, Jisuk] Knowesis Inc, Analyt & Reporting, San Antonio, TX USA.
[Kimura, Jennifer] US Air Force, Dept Def, Yokota AFB, Fussa, Japan.
RP Rowan, AB (reprint author), 48 MDOS CC,Unit 5115, APO, AE 09461 USA.
EM anderson.rowan@us.af.mil
RI Nolasco, Arlette/D-9885-2016
NR 31
TC 0
Z9 0
U1 1
U2 7
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0899-5605
EI 1532-7876
J9 MIL PSYCHOL
JI Milit. Psychol.
PD JUL
PY 2015
VL 27
IS 4
BP 242
EP 251
DI 10.1037/mil0000076
PG 10
WC Psychology, Multidisciplinary
SC Psychology
GA CL5BS
UT WOS:000356975400005
ER
PT J
AU Carrese, PO
AF Carrese, Paul O.
TI The Road to Character
SO COMMENTARY
LA English
DT Book Review
C1 [Carrese, Paul O.] US Air Force Acad, Polit Sci, Colorado Springs, CO 80840 USA.
RP Carrese, PO (reprint author), US Air Force Acad, Polit Sci, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU AMER JEWISH COMMITTEE
PI NEW YORK
PA 165 E 56TH ST, NEW YORK, NY 10022 USA
SN 0010-2601
EI 1943-4634
J9 COMMENTARY
JI Commentary
PD JUL-AUG
PY 2015
VL 140
IS 1
BP 67
EP 69
PG 3
WC Political Science; Social Issues
SC Government & Law; Social Issues
GA CL0NR
UT WOS:000356639900027
ER
PT J
AU Hansberger, J
AF Hansberger, Jason
TI China's Hukou System: Markets, Migrants, and Institutional Change
SO GOVERNANCE-AN INTERNATIONAL JOURNAL OF POLICY ADMINISTRATION AND
INSTITUTIONS
LA English
DT Book Review
C1 [Hansberger, Jason] US Air Force, Washington, DC 20330 USA.
RP Hansberger, J (reprint author), US Air Force, Washington, DC 20330 USA.
NR 1
TC 0
Z9 0
U1 2
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0952-1895
EI 1468-0491
J9 GOVERNANCE
JI Governance-Int. J. Policy Adm. I.
PD JUL
PY 2015
VL 28
IS 3
BP 414
EP 416
DI 10.1111/gove.12157
PG 3
WC Political Science; Public Administration
SC Government & Law; Public Administration
GA CK6AP
UT WOS:000356310500016
ER
PT J
AU Oppenheimer, MW
Weintraub, IE
Sigthorsson, DO
Doman, DB
AF Oppenheimer, Michael W.
Weintraub, Isaac E.
Sigthorsson, David O.
Doman, David B.
TI Control of a Minimally Actuated Biomimetic Vehicle Using Quarter-Cycle
Wingbeat Modulation
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID HOVERING INSECT FLIGHT; HAWKMOTH MANDUCA-SEXTA; MICRO-AIR VEHICLES;
FLAPPING FLIGHT; POWER REQUIREMENTS; ROBOTIC INSECTS; AERODYNAMICS;
KINEMATICS; MECHANICS; LIFT
AB This paper describes a technique, called quarter-cycle constant period frequency modulation, to control the motion of wings on a flapping wing micro-air vehicle. This technique allows control over the wingbeat period and three additional points (the two zero crossings and the reversal of wing direction) within a single wingbeat cycle, allowing modulation of the wing's velocity to provide direct control over six degrees of freedom of overall vehicle motion. Using a blade element based aerodynamic model, both instantaneous and cycle-averaged forces and moments are analytically computed for a specific type of wingbeat motion that enables nearly decoupled, multi-degrees of freedom control of an aircraft. Wing motion is controlled using oscillators whose frequencies and three additional parameters change once per wingbeat cycle. A control oriented dynamic model of the vehicle is derived, which is based on a cycle-averaged representation of the forces and moments, and control derivatives are calculated. A cycle-averaged control law is designed to provide direct control over six degrees of freedom of the vehicle.
C1 [Oppenheimer, Michael W.; Doman, David B.] US Air Force, Res Lab, Autonomous Control Branch, Wright Patterson AFB, OH 45433 USA.
[Weintraub, Isaac E.; Sigthorsson, David O.] US Air Force, Res Lab, Gen Dynam Informat Technol, Wright Patterson AFB, OH 45433 USA.
RP Oppenheimer, MW (reprint author), US Air Force, Res Lab, Autonomous Control Branch, 2210 8th St,Bldg 146,Room 305, Wright Patterson AFB, OH 45433 USA.
EM michael.oppenheimer@us.af.mil; isaac.weintraub.ctr@us.af.mil;
david.sigthorsson.ctr.is@us.af.mil; david.doman@us.af.mil
NR 36
TC 0
Z9 0
U1 0
U2 6
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JUL
PY 2015
VL 38
IS 7
BP 1187
EP 1196
DI 10.2514/1.G000548
PG 10
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CK4HB
UT WOS:000356183800002
ER
PT J
AU Miracle, DB
AF Miracle, D. B.
TI Critical Assessment 14: High entropy alloys and their development as
structural materials
SO MATERIALS SCIENCE AND TECHNOLOGY
LA English
DT Article
DE High entropy alloys; Alloy development; Structural metals; Equilibrium;
High throughput experiments; ICMSE
ID MULTICOMPONENT ALLOYS; COMBINATORIAL; EXPLORATION; METALS; DESIGN; TOOLS
AB The field of high entropy alloys has exploded in its first 10 years. Vast opportunities for new compositions and microstructures are offered by this idea, but current efforts have become surprisingly focused on a narrow set of systems and on the search for single phase solid solution alloys. This perspective outlines the challenge to re-engage the full range of compositional and microstructural complexity in the search for new structural metals. We draw on extensive experience in the development of exquisite multiphase microstructures and define new high throughput experiments and computations that must be integrated to respond to this challenge. Broadening the scope is expected to provide dramatic new opportunities in the field of complex concentrated alloys.
C1 Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Miracle, DB (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM daniel.miracle@us.af.mil
NR 32
TC 21
Z9 21
U1 10
U2 56
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 0267-0836
EI 1743-2847
J9 MATER SCI TECH-LOND
JI Mater. Sci. Technol.
PD JUL
PY 2015
VL 31
IS 10
BP 1142
EP 1147
DI 10.1179/1743284714Y.0000000749
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CK9SN
UT WOS:000356579900002
ER
PT J
AU Bruns, J
Zearley, A
George, T
Scott-Emuakpor, O
Holycross, C
AF Bruns, Jeffery
Zearley, Alyssa
George, Tommy
Scott-Emuakpor, Onome
Holycross, Casey
TI Vibration-Based Bending Fatigue of a Hybrid Insert-Plate System
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE Fatigue; Testing; Gas turbine engine; Vibration; Materials
ID LIFE PREDICTION; TI-6AL-4V; STRESS
AB A hybrid bending specimen system was developed to reduce material waste when using the vibration-based fatigue method to gather high cycle fatigue (HCF) data. In the vibration-based fatigue method, a base-excited plate specimen is driven into a high frequency resonant mode until failure. Compared to the axial testing methods, vibration-based failure better represents the conditions and surface-initiated cracks experienced by structural components subject to high frequency vibrations, like blades and vanes in gas turbine engines. In addition, the method produces data over 40 times faster than conventional axial testing methods. Only a small portion of the vibration-based bending specimen is needed to determine crack initiation failure. In order to reduce material waste, a hybrid bending system was designed to test a small specimen held in a reusable carrier plate, thereby reducing material costs to gather HCF data. The final optimized design, the Bruns-Zearley plate specimen, produced fatigue data using 95 % less material. The results are comparable tofatigue data acquired from standard vibration-based plate specimen methods within a 95 % confidence interval.
C1 [Bruns, Jeffery; Zearley, Alyssa] Univ Technol Corp, Dayton, OH 45433 USA.
[George, Tommy; Scott-Emuakpor, Onome; Holycross, Casey] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Scott-Emuakpor, O (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM onome.scott-emuakpor@wpafb.af.mil
FU Air Force Research Laboratories (AFRL); Turbine Engine Fatigue Facility
(TEFF)
FX The authors would like to thank the Air Force Research Laboratories
(AFRL), specifically the Turbine Engine Fatigue Facility (TEFF) for
their financial support, facility and equipment access, and
encouragement of this research.
NR 20
TC 0
Z9 0
U1 4
U2 8
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
EI 1741-2765
J9 EXP MECH
JI Exp. Mech.
PD JUL
PY 2015
VL 55
IS 6
BP 1067
EP 1080
DI 10.1007/s11340-015-0004-6
PG 14
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA CJ6RT
UT WOS:000355622000006
ER
PT J
AU Beck, JA
Brown, JM
Kaszynski, AA
Cross, CJ
Slater, JC
AF Beck, Joseph A.
Brown, Jeffrey M.
Kaszynski, Alex A.
Cross, Charles J.
Slater, Joseph C.
TI Geometric Mistuning Reduced-Order Models for Integrally Bladed Rotors
With Mistuned Disk-Blade Boundaries
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID DYNAMIC-ANALYSIS; VIBRATION
AB New geometric mistuning modeling approaches for integrally bladed rotors (IBRs) are developed for incorporating geometric perturbations to a fundamental disk-blade sector, particularly the disk-blade boundary or connection. Reduced-order models (ROMs) are developed from a Craig-Bampton component mode synthesis (C-B CMS) framework that is further reduced by a truncated set of interface modes that are obtained from an Eigen-analysis of the C-B CMS constraint degrees of freedom (DOFs). An investigation into using a set of tuned interface modes and tuned constraint modes for model reduction is then performed, which offers significant computational savings for subsequent analyses. Two configurations of disk-blade connection mistuning are investigated: as-measured principal component (PC) deviations and random perturbations to the interblade spacing. Furthermore, the perturbation sizes are amplified to investigate the significance of incorporating mistuned disk-blade connections during solid model generation from optically scanned geometries. Free and forced response results are obtained for each ROM and each disk-blade connection type and compared to full finite element model (FEM) solutions. It is shown that the developed methods provide accurate results with a reduction in solution time compared to the full FEM. In addition, results indicate that the inclusion of a mistuned disk-blade connection deviations are small or conditions where large perturbations are localized to a small areas of the disk-blade connection.
C1 [Beck, Joseph A.] Air Force Res Lab, Mfg & Ind Technol Div, Wright Patterson AFB, OH 45433 USA.
[Brown, Jeffrey M.; Kaszynski, Alex A.; Cross, Charles J.] Air Force Res Lab, Turbine Engine Div, Wright Patterson AFB, OH 45433 USA.
[Slater, Joseph C.] Wright State Univ, Def Aerosp Studies, Dayton, OH 45435 USA.
RP Beck, JA (reprint author), Air Force Res Lab, Mfg & Ind Technol Div, Wright Patterson AFB, OH 45433 USA.
EM Joseph.Beck.8@us.af.mil
OI Slater, Joseph/0000-0002-1923-9279
NR 28
TC 0
Z9 0
U1 2
U2 11
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
EI 1528-8900
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD JUL
PY 2015
VL 137
IS 7
AR 071001
DI 10.1115/1.4029122
PG 11
WC Engineering, Mechanical
SC Engineering
GA CJ7SY
UT WOS:000355701200001
ER
PT J
AU Tossell, CC
Kortum, P
Shepard, C
Rahmati, A
Zhong, L
AF Tossell, Chad C.
Kortum, Philip
Shepard, Clayton
Rahmati, Ahmad
Zhong, Lin
TI You can lead a horse to water but you cannot make him learn: Smartphone
use in higher education
SO BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY
LA English
DT Article
ID DIGITAL TECHNOLOGIES; MOBILE; DEVICES
AB Smartphone technology is penetrating world markets and becoming ubiquitous in most college settings. This study takes a naturalistic approach to explore the use of these devices to support student learning. Students that had never used a smartphone were recruited to participate and reported on their expectations of the value of smartphones to achieve their educational goals. Instrumented iPhones that logged device usage were then distributed to these students to use freely over the course of 1 year. After the study, students again reported on the actual value of their smartphones to support their educational goals. We found that students' reports changed substantially before and after the study; specifically, the utility of the smartphone to help with education was perceived as favorable prior to use, and then, by the end of the study, they viewed their phones as detrimental to their educational goals. Although students used their mobile device for informal learning and access to school resources according to the logged data, they perceived their iPhones as a distraction and a competitor to requisite learning for classroom performance.
C1 [Tossell, Chad C.] US Air Force Res Lab, C4ISR Training Res, Continuous Learning Branch, Wright Patterson AFB, OH USA.
[Kortum, Philip] Rice Univ, Dept Psychol, Houston, TX 77005 USA.
[Shepard, Clayton; Zhong, Lin] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA.
[Rahmati, Ahmad] Broadcom Corp, Irvine, CA USA.
RP Kortum, P (reprint author), Rice Univ, 6100 Main St MS 25, Houston, TX 77005 USA.
EM pkortum@rice.edu
FU NSF HCC/IIS [0803556]
FX The authors thank Amy Buxbaum, Wen Xing, Louis Fornage and Beth Herlin
for their tremendous efforts on this project. We also greatly appreciate
the comments provided by anonymous reviewers for the earlier versions of
this manuscript. This research was supported by NSF HCC/IIS #0803556.
The views expressed in this paper are those of the authors and do not
reflect the official policy or position of the United States Air Force,
Department of Defense or the US Government.
NR 36
TC 5
Z9 5
U1 9
U2 51
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0007-1013
EI 1467-8535
J9 BRIT J EDUC TECHNOL
JI Br. J. Educ. Technol.
PD JUL
PY 2015
VL 46
IS 4
BP 713
EP 724
DI 10.1111/bjet.12176
PG 12
WC Education & Educational Research
SC Education & Educational Research
GA CJ9WS
UT WOS:000355854600009
ER
PT J
AU Gowayed, Y
Abouzeida, E
Smyth, I
Ojard, G
Ahmad, J
Santhosh, U
Jefferson, G
AF Gowayed, Y.
Abouzeida, E.
Smyth, I.
Ojard, G.
Ahmad, J.
Santhosh, U.
Jefferson, G.
TI The role of oxidation in time-dependent response of ceramic matrix
composites
SO COMPOSITES PART B-ENGINEERING
LA English
DT Article
DE Ceramic-matrix composites; Creep; Residual/internal stress; Mechanical
testing
ID HIGH-TEMPERATURE OXIDATION; ELASTIC PROPERTIES; SILICON-CARBIDE;
CREEP-BEHAVIOR; DEGREES-C; KINETICS; AIR
AB In this work, a model is constructed to account for the effect of oxidation of the fiber, fiber interface coating and surrounding matrix on the stress distribution and strain accumulation in ceramic matrix composites. The model includes the role of the fabric architecture, the effect of porosity and the distribution of cracks in its formulation and utilizes oxidation rate constants and phenomenological models for the progress of oxidation as reported in literature.
Dwell fatigue experiments were carried out for silicon carbide/silicon carbide nitride (SiC/SiNC) and Melt infiltrated silicon carbide/silicon carbide (MI SiC/SiC) composites to evaluate their time-dependent strain accumulation. Strain accumulation due to oxidation calculated by the model was compared to time-dependent strain obtained from experiment and showed that the rate of strain accumulation due to oxidation was low before the fibers were exposed to the environment but drastically increased after that. Such high rate of strain accumulation can be one of the main causes for failure of the composite.
Model results showed that strain accumulation in both composites due to oxidation was dependent on the stress level with the SiC/SiNC accumulating more strain at similar stress levels. This can be explained by the higher modulus of the MI SiC/SiC that limits deformation, reducing crack density and accordingly decreasing the chance of oxygen to infiltrate the specimen and oxidize the fibers. Strain accumulation due to oxidation was also dependent on the fabric architecture and stress distribution within the unit cell. Additionally, comparing the effect of the value of the linear and parabolic oxidation rate constants reported by different researchers showed that not only is their absolute value important, but also their ratio to one another. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Jefferson, G.] AFRL RXLN, Air Force Res Lab, Wright Patterson AFB, OH USA.
[Gowayed, Y.; Abouzeida, E.] Auburn Univ, Dept Polymer & Fiber Engn, Auburn, AL 36849 USA.
[Smyth, I.] Pratt & Whitney, E Hartford, CT USA.
[Ojard, G.] United Technol Res Ctr, E Hartford, CT 06108 USA.
[Ahmad, J.; Santhosh, U.] Struct Analyt Inc, Carlsbad, CA USA.
RP Gowayed, Y (reprint author), Auburn Univ, Dept Polymer & Fiber Engn, Auburn, AL 36849 USA.
EM gowayed@auburn.edu
FU Air Force Research Laboratory, Materials & Manufacturing Directorate,
Wright-Patterson AFB, OH, USA [FA8650-12-C-5107, FA8650-12-C-5108]
FX The Air Force Research Laboratory, Materials & Manufacturing
Directorate, Wright-Patterson AFB, OH, USA supported this effort under
contracts FA8650-12-C-5107 and FA8650-12-C-5108.
NR 23
TC 4
Z9 4
U1 1
U2 16
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-8368
EI 1879-1069
J9 COMPOS PART B-ENG
JI Compos. Pt. B-Eng.
PD JUL
PY 2015
VL 76
BP 20
EP 30
DI 10.1016/j.compositesb.2015.02.005
PG 11
WC Engineering, Multidisciplinary; Materials Science, Composites
SC Engineering; Materials Science
GA CJ2ZE
UT WOS:000355352400003
ER
PT J
AU Murrell, DA
Raghunathan, R
Lester, LF
AF Murrell, David A.
Raghunathan, Ravi
Lester, Luke F.
TI A Model for a Quantum-Dot Gain-Lever Mode-Locked Laser
SO IEEE PHOTONICS TECHNOLOGY LETTERS
LA English
DT Article
DE Quantum-dot; mode-locked laser; gain-lever
ID SEGMENTED CONTACT METHOD; SEMICONDUCTOR-LASERS; PULSE GENERATION;
OPTICAL GAIN; MODULATION; LOCKING; CAVITY
AB An alternative explanation of achieving passive mode-locking in a quantum-dot (QD) laser without a dedicated saturable absorber section is proposed. The method employs an analytical model based on the net gain modulation within the cavity. Two differentially pumped sections, operated in forward bias, may utilize the differential gain contrast between them to enable pulse formation. The large differential gain contrast available in QD media and the relative ease with which such devices can be fabricated extend the utility of this methodology for the development of a QD gain-lever mode-locked laser as a next generation optical source. Alternative cavity configurations that exclude a dedicated saturable absorber section and the concomitant reduction of intracavity losses provides another path in the development of short cavity lasers with high pulse repetition rates.
C1 [Murrell, David A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Raghunathan, Ravi; Lester, Luke F.] Virginia Polytech Inst & State Univ, Bradley Sch Elect & Comp Engn, Blacksburg, VA 24061 USA.
RP Murrell, DA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM physicsdmurrell@gmail.com; raghunat@vt.edu; lflester@vt.edu
FU Air Force Office of Scientific Research [FA9550-12-1-0049]; Air Force
Research Laboratory, Kirtland AFB, NM, USA [FA9453-12-1-0132]
FX This work was supported in part by the Air Force Office of Scientific
Research under Grant FA9550-12-1-0049 and in part by the Air Force
Research Laboratory, Kirtland AFB, NM, USA, under Grant
FA9453-12-1-0132.
NR 18
TC 0
Z9 0
U1 3
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1041-1135
EI 1941-0174
J9 IEEE PHOTONIC TECH L
JI IEEE Photonics Technol. Lett.
PD JUL 1
PY 2015
VL 27
IS 13
BP 1441
EP 1444
DI 10.1109/LPT.2015.2424687
PG 4
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA CK1AK
UT WOS:000355937100023
ER
PT J
AU Viswanathan, SP
Sanyal, AK
Leve, F
McClamroch, NH
AF Viswanathan, Sasi P.
Sanyal, Amit K.
Leve, Frederick
McClamroch, N. Harris
TI Dynamics and Control of Spacecraft With a Generalized Model of Variable
Speed Control Moment Gyroscopes
SO JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID RIGID-BODY; ATTITUDE; STABILIZATION
AB The attitude dynamics model for a spacecraft with a variable speed control moment gyroscope (VSCMG) is derived using the principles of variational mechanics. The resulting dynamics model is obtained in the framework of geometric mechanics, relaxing some of the assumptions made in prior literature on control moment gyroscopes (CMGs). These assumptions include symmetry of the rotor and gimbal structure, and no offset between the centers of mass of the gimbal and the rotor. The dynamics equations show the complex nonlinear coupling between the internal degrees-of-freedom associated with the VSCMG and the spacecraft base body's rotational degrees-of-freedom. This dynamics model is then further generalized to include the effects of multiple VSCMGs placed in the spacecraft base body, and sufficient conditions for nonsingular VSCMG configurations are obtained. General ideas on control of the angular momentum of the spacecraft using changes in the momentum variables of a finite number of VSCMGs are provided. A control scheme using a finite number of VSCMGs for attitude stabilization maneuvers in the absence of external torques and when the total angular momentum of the spacecraft is zero is presented. The dynamics model of the spacecraft with a finite number of VSCMGs is then simplified under the assumptions that there is no offset between the centers of mass of the rotor and gimbal, and the rotor is axisymmetric. As an example, the case of three VSCMGs with axisymmetric rotors, placed in a tetrahedron configuration inside the spacecraft, is considered. The control scheme is then numerically implemented using a geometric variational integrator (GVI). Numerical simulation results with zero and nonzero rotor offset between centers of mass of gimbal and rotor are presented.
C1 [Viswanathan, Sasi P.; Sanyal, Amit K.] New Mexico State Univ, Mech & Aerosp Engn, Las Cruces, NM 88003 USA.
[Leve, Frederick] Air Force Res Lab, Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
[McClamroch, N. Harris] Univ Michigan, Aerosp Engn, Ann Arbor, MI 48109 USA.
RP Sanyal, AK (reprint author), New Mexico State Univ, Mech & Aerosp Engn, Las Cruces, NM 88003 USA.
EM sashi@nmsu.edu; asanyal@nmsu.edu; afrl.rvsv@kirtland.af.mil;
nhm@engin.umich.edu
NR 35
TC 0
Z9 0
U1 0
U2 4
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-0434
EI 1528-9028
J9 J DYN SYST-T ASME
JI J. Dyn. Syst. Meas. Control-Trans. ASME
PD JUL
PY 2015
VL 137
IS 7
AR 071003
DI 10.1115/1.4029626
PG 12
WC Automation & Control Systems; Instruments & Instrumentation
SC Automation & Control Systems; Instruments & Instrumentation
GA CJ7SN
UT WOS:000355699700003
ER
PT J
AU West, R
Pelser, AC
AF West, Ryan
Pelser, Adam C.
TI PERCEIVING GOD THROUGH NATURAL BEAUTY
SO FAITH AND PHILOSOPHY
LA English
DT Article
AB In Perceiving God, William Alston briefly suggests the possibility of perceiving God indirectly through the perception of another object. Following recent work by C. Stephen Evans, we argue that Thomas Reid's notion of "natural signs" helpfully illuminates how people can perceive God indirectly through natural beauty. First, we explain how some natural signs enable what Alston labels "indirect perception." Second, we explore how certain emotions make it possible to see both beauty and the excellence of the minds behind beauty. Finally, we explain how aesthetic emotions can involve indirect perception of God via the natural sign of natural beauty.
C1 [West, Ryan; Pelser, Adam C.] Baylor Univ, US Air Force Acad, Waco, TX 76798 USA.
RP West, R (reprint author), Baylor Univ, US Air Force Acad, Waco, TX 76798 USA.
NR 30
TC 0
Z9 0
U1 0
U2 0
PU PHILOSOPHY DOCUMENTATION CENTER
PI CHARLOTTESVILLE
PA PO BOX 7147, CHARLOTTESVILLE, VA 22906-7147 USA
SN 0739-7046
EI 2153-3393
J9 FAITH PHILOS
JI Faith Philos.
PD JUL
PY 2015
VL 32
IS 3
BP 293
EP 312
DI 10.5840/faithphil20157743
PG 20
WC Religion
SC Religion
GA DW3OL
UT WOS:000383550800003
ER
PT J
AU Murphy, NR
Gallagher, RC
Sun, LR
Jones, JG
Grant, JT
AF Murphy, Neil R.
Gallagher, Regina C.
Sun, Lirong
Jones, John G.
Grant, John T.
TI Optical and chemical properties of mixed-valent rhenium oxide films
synthesized by reactive DC magnetron sputtering
SO OPTICAL MATERIALS
LA English
DT Article
DE Rhenium oxide; Ellipsometry; XPS; Thin films; Magnetron; Sputtering
ID THIN-FILMS; PHOTOELECTRON-SPECTROSCOPY; CATALYSTS; ENERGY; XPS;
ABSORPTION; OXIDATION; SYSTEM; OXYGEN; LAYERS
AB Mixed-valent rhenium oxide thin films were deposited using reactive magnetron sputtering employing a metallic rhenium target within an oxygen argon environment. The oxygen and argon flow rates were systematically varied, while the extinction coefficient, k, of the deposited layers was monitored using in situ spectroscopic ellipsometry. In situ monitoring was used to identify absorption features specific to ReO3, namely, the minimization of k brought on by the gap between interband absorption features in the UV at 310 nm and the onset of free electron absorption at wavelengths above 540 nm. Based on these results, oxygen flow ratios of 50% and 60% were shown to produce films having optical properties characteristic of ReO3, and thus, were selected for detailed ex situ characterization. Chemical analysis via X-ray photoelectron spectroscopy confirmed that all films consisted largely of ReO3, but had some contributions from Re2O3, ReO2 and Re2O7. Additional monitoring of the chemistry, as a function of environmental exposure time, indicated a correlation between structural instability and the presence of Re2O3 and Re2O7 in the films. Published by Elsevier B.V.
C1 [Murphy, Neil R.; Jones, John G.] Air Force Res Lab, Mat & Mfg Directorate, WPAFB, Dayton, OH 45433 USA.
[Gallagher, Regina C.] Southwestern Ohio Council Higher Educ, Dayton, OH 45420 USA.
[Sun, Lirong; Grant, John T.] Gen Dynam Informat Technol, Dayton, OH USA.
[Grant, John T.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Murphy, NR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM neil.murphy.1@us.af.mil
NR 35
TC 3
Z9 3
U1 5
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0925-3467
EI 1873-1252
J9 OPT MATER
JI Opt. Mater.
PD JUL
PY 2015
VL 45
BP 191
EP 196
DI 10.1016/j.optmat.2015.03.035
PG 6
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA CH2LW
UT WOS:000353857700031
ER
PT J
AU Seastrand, S
Serra, Y
Castro, C
Ritchie, E
AF Seastrand, Simona
Serra, Yolande
Castro, Christopher
Ritchie, Elizabeth
TI The dominant synoptic-scale modes of North American monsoon
precipitation
SO INTERNATIONAL JOURNAL OF CLIMATOLOGY
LA English
DT Article
DE North American monsoon; easterly waves; upper-level inverted troughs;
gulf surge; mesoscale convective systems
ID SOUTHWESTERN UNITED-STATES; GULF-OF-CALIFORNIA; TROPICAL EASTERLY WAVES;
INTRASEASONAL VARIABILITY; MEXICAN MONSOON; MOISTURE SURGES; SUMMER
MONSOON; NAME 2004; PACIFIC; SYSTEM
AB In this study, we explore the mechanisms of synoptic rainfall variability using observations from the Tropical Rainfall Measuring Mission satellite. Although previously shown to have an important impact on North American monsoon rainfall, tropical cyclones are excluded from this analysis, in order to focus on more frequent synoptic disturbances within the region. A rotated empirical orthogonal function (EOF) analysis of North American monsoon rainfall during June to September 2002-2009 suggests that low-level tropical disturbances contribute to the leading two modes of precipitation variability within this region. These disturbances result in gulf surges or low-level surges of moisture up the Gulf of California, and provide a key moisture source to facilitate the development of organized convection. In the first mode, the low-level trough brings precipitation to lower elevations along the western slopes of the Sierra Madre Occidental south of Hermosillo, Mexico and over the southern Baja Peninsula. In the second mode, the low-level trough interacts with an upper-level inverted trough enhancing precipitation into the southwestern United States and northwest Mexico. In particular, the upper-level trough contributes to the easterly to northeasterly shear across the region, favouring mesoscale convective organization and enhanced deep convection over the Sierra Madre Occidental and higher elevations in southeast Arizona. The EOF methodology offers an objective approach for determining the dominant modes of precipitation for the monsoon region useful for identifying past and monitoring future low-frequency impacts on these modes.
C1 [Seastrand, Simona] Univ Arizona, Dept Arid Land Resource Sci, Tucson, AZ USA.
[Seastrand, Simona] US Air Force, Operat Weather Squadron 25, Tucson, AZ USA.
[Serra, Yolande; Castro, Christopher; Ritchie, Elizabeth] Univ Arizona, Dept Atmospher Sci, Tucson, AZ USA.
RP Seastrand, S (reprint author), US Air Force, Operat Weather Squadron 25, 3880 S Phoenix St,Room 107, Davis Monthan AFB, AZ 85707 USA.
EM simona.seastrand@us.af.mil
RI Ritchie, Elizabeth/B-4232-2016
OI Ritchie, Elizabeth/0000-0002-3413-5830
FU National Science Foundation [AGS 0756806]
FX We would like to thank Zachary Finch and Richard Johnson for sharing
their QG omega code used in this study. We would also like to thank two
anonymous reviewers for their helpful comments that improved the
manuscript over its original version. This work was funded by a grant
from the National Science Foundation (AGS 0756806).
NR 41
TC 8
Z9 8
U1 3
U2 10
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0899-8418
EI 1097-0088
J9 INT J CLIMATOL
JI Int. J. Climatol.
PD JUN 30
PY 2015
VL 35
IS 8
BP 2019
EP 2032
DI 10.1002/joc.4104
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA CM5OG
UT WOS:000357737000025
ER
PT J
AU Basiri, A
Vitebskiy, I
Kottos, T
AF Basiri, A.
Vitebskiy, I.
Kottos, T.
TI Light scattering in pseudopassive media with uniformly balanced gain and
loss
SO PHYSICAL REVIEW A
LA English
DT Article
ID PARITY-TIME SYMMETRY; NEGATIVE-INDEX METAMATERIALS; OPTICAL ISOLATION;
REFRACTION
AB We introduce a class of metamaterials with uniformly balanced gain and loss associated with complex permittivity and permeability constants. The refractive index of such a balanced pseudopassive metamaterial is real. An unbounded uniform pseudopassive medium has transport characteristics similar to those of its truly passive and lossless counterpart with the same real refractive index. However, bounded pseudopassive samples show some unexpected scattering features which can be further emphasized by including such elements in a photonic structure.
C1 [Basiri, A.; Kottos, T.] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
[Vitebskiy, I.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Basiri, A (reprint author), Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
FU AFOSR MURI grant [FA9550-14-1-0037, LRIR-09RY04COR]; NSF grant
[ECCS-1128571]
FX This work was partially supported by an AFOSR MURI grant (Grant No.
FA9550-14-1-0037), Grant No. LRIR-09RY04COR, and by a NSF grant (Grant
No. ECCS-1128571).
NR 43
TC 5
Z9 5
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD JUN 30
PY 2015
VL 91
IS 6
AR 063843
DI 10.1103/PhysRevA.91.063843
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA CL6PL
UT WOS:000357089200006
ER
PT J
AU Wolff, G
Bell, M
Escobar, J
Ruiz, S
AF Wolff, Greg
Bell, Michael
Escobar, James
Ruiz, Stefani
TI Estimates of pertussis vaccine effectiveness in United States air force
pediatric dependents
SO VACCINE
LA English
DT Article
DE Pertussis; Vaccine effectiveness; Immunization; Department of defense
ID TEST-NEGATIVE DESIGN; INFLUENZA VACCINE; ADOLESCENTS; OUTBREAK;
COVERAGE; CHILDREN
AB Background: Pertussis vaccination compliance is critical for reduction in the prevalence of disease; however, the current acellular pertussis vaccine may not provide sufficient protection from infection. This study examined acellular pertussis vaccine effectiveness (VE) for Air Force dependents less than 12 years of age.
Methods: We conducted a case-control study among Air Force pediatric dependents from 2011 to 2013, comparing cases with positive pertussis test results to controls who received the same lab tests with a negative result. Our study population was categorized by age group and vaccination status based on the Centers for Disease Control and Prevention recommended pertussis vaccination schedule. VE was calculated with respect to vaccination status and pertussis lab results.
Results: We compared 27 pertussis laboratory positive cases with 974 pertussis laboratory negative controls, 2 months to <12 years old. Comparing completely vaccinated to non-vaccinated patients, the overall VE was 78.3% (95% confidence interval (CI): 48.6, 90.8; p <0.001). VE was highest among those 15 months to <6 years old: 97.6% (95% CI: 78.5, 99.7; p <0.001). Children 6 to <12 years old had the lowest VE: 48.5% (95% CI: -74.0, 84.7; p = 0.28). Comparing partially vaccinated patients to nonvaccinated patients yielded 64.2% (95% CI: -7.2, 88.1; p = 0.06) overall VE.
Conclusions: Acellular pertussis vaccination was effective at preventing laboratory confirmed pertussis among our Air Force pediatric dependent population, with highest protection among completely vaccinated, young children. Older children received the lowest amount of protection. Partial vaccination had near significant protection. Our overall calculated pertussis VE corroborates other pertussis VE studies looking at similar age groups. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Wolff, Greg; Bell, Michael; Escobar, James; Ruiz, Stefani] US Air Force, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
[Wolff, Greg; Ruiz, Stefani] Solut Innovat Technol, Fairborn, OH 45324 USA.
RP Wolff, G (reprint author), USAF SAM PHR, Solut Innovat Technol, 3152 Presidential Dr, Fairborn, OH 45324 USA.
EM greg.wolff.1@us.af.mil
NR 28
TC 2
Z9 2
U1 0
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
EI 1873-2518
J9 VACCINE
JI Vaccine
PD JUN 22
PY 2015
VL 33
IS 28
BP 3228
EP 3233
DI 10.1016/j.vaccine.2015.04.084
PG 6
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA CL8PC
UT WOS:000357235600013
PM 25957071
ER
PT J
AU Nguyen, KA
Pachter, R
Day, PN
Su, HB
AF Nguyen, Kiet A.
Pachter, Ruth
Day, Paul N.
Su, Haibin
TI Theoretical analysis of structures and electronic spectra in molecular
cadmium chalcogenide clusters
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID AB-INITIO PSEUDOPOTENTIALS; BASIS-SETS; TRANSITION-ELEMENTS; BULK
SEMICONDUCTOR; OPTICAL-PROPERTIES; COUPLED-CLUSTER; ORBITAL METHODS;
QUANTUM DOTS; BUILT-UP; SIZE
AB We present calculated structural and optical properties of molecular cadmium chalcogenide non-stoichiometric clusters with a size range of less than 1 nm to more than 2 nm with well-defined chemical compositions and structures in comparison to experimental characterization and previous theoretical work. A unified treatment of these clusters to obtain a fundamental understanding of the size, ligand, and solvation effects on their optical properties has not been heretofore presented. The clusters belong to three topological classes, specifically supertetrahedral (Tn), penta-supertetrahedral (Pn), and capped supertetrahedral (Cn), where n is the number of metal layers in each cluster. The tetrahedrally shaped Tn clusters examined in this work are Cd(ER)(4)(2-) (T1), Cd-4(ER)(10)(2-) (T2), and Cd10E4'(ER)(16)(4-) (T3), where R is an organic group, E and E' are chalcogen atoms (sulfur or selenium). The first member of the Pn series considered is M8E'(ER)(16)(2-). For the Cn series, we consider the first three members, M17E4'(ER)(28)(2-), M32E14'(ER)(36)L-4, and M54E32'(ER)(48)L-4(4-) (L = neutral ligand). Mixed ligand clusters with capping ER groups replaced by halogen or neutral ligands were also considered. Ligands and solvent were found to have a large influence on the color and intensity of the electronic absorption spectra of small clusters. Their effects are generally reduced with increasing cluster sizes. Blueshifts were observed for the first electronic transition with reduced size for both cadmium sulfide and cadmium selenide series. Due to weakly absorbing and forbidden transitions underlying the one-photon spectra, more care is needed in interpreting the quantum confinement from the clusters' lowest-energy absorption bands. (C) 2015 AIP Publishing LLC.
C1 [Nguyen, Kiet A.; Pachter, Ruth; Day, Paul N.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Nguyen, Kiet A.] UES Inc, Dayton, OH 45432 USA.
[Day, Paul N.] Gen Dynam Informat Technol Inc, Dayton, OH 45431 USA.
[Su, Haibin] Nanyang Technol Univ, Singapore 639798, Singapore.
RP Nguyen, KA (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM kiet.nguyen.2.ctr@us.af.mil; ruth.pachter@us.af.mil
RI Su, Haibin/A-9434-2008
OI Su, Haibin/0000-0001-9760-6567
FU Air Force Office of Scientific Research; Air Force Research Laboratory
DoD Supercomputing Resource Center
FX We gratefully acknowledge support from the Air Force Office of
Scientific Research and the Air Force Research Laboratory DoD
Supercomputing Resource Center.
NR 53
TC 5
Z9 5
U1 2
U2 33
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 21
PY 2015
VL 142
IS 23
AR 234305
DI 10.1063/1.4922320
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CL0HU
UT WOS:000356623000015
PM 26093557
ER
PT J
AU Uskov, DB
Lougovski, P
Alsing, PM
Fanto, ML
Kaplan, L
Smith, AM
AF Uskov, D. B.
Lougovski, P.
Alsing, P. M.
Fanto, M. L.
Kaplan, L.
Smith, A. Matthew
TI Optimal mode transformations for linear-optical cluster-state generation
SO PHYSICAL REVIEW A
LA English
DT Article
AB We analyze the generation of linear-optical cluster states (LOCSs) via sequential addition of one and two qubits. Existing approaches employ the stochastic linear-optical two-qubit controlled-Z (CZ) gate with success rate of 1/9 per operation. The question of optimality of the CZ gate with respect to LOCS generation has remained open. We report that there are alternative schemes to the CZ gate that are exponentially more efficient and show that sequential LOCS growth is indeed globally optimal. We find that the optimal cluster growth operation is a state transformation on a subspace of the full Hilbert space. We show that the maximal success rate of postselected entangling n photonic qubits or m Bell pairs into a cluster is (1/2)(n-1) and (1/4)(m-1), respectively, with no ancilla photons, and we give an explicit optical description of the optimal mode transformations.
C1 [Uskov, D. B.] Univ Brescia, Dept Math & Nat Sci, Owensboro, KY 42301 USA.
[Uskov, D. B.; Kaplan, L.] Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA.
[Lougovski, P.; Smith, A. Matthew] Oak Ridge Natl Lab, Quantum Informat Sci Grp, Oak Ridge, TN 37831 USA.
[Alsing, P. M.; Fanto, M. L.; Smith, A. Matthew] Air Force Res Lab, Informat Directorate, Rome, NY 13440 USA.
RP Uskov, DB (reprint author), Univ Brescia, Dept Math & Nat Sci, Owensboro, KY 42301 USA.
EM dmitry.uskov@brescia.edu
FU U.S. Department of Energy [DE-AC05-00OR22725]; AFRL Information
Directorate [FA 8750-11-2-0218]; NSF [PHY-1005709]; AFOSR
FX This manuscript has been authored by UT-Batelle, LLC under Contract No.
DE-AC05-00OR22725 with the U.S. Department of Energy. The U.S.
Government retains a nonexclusive, irrevocable, world-wide license to
publish or reproduce the published form of this manuscript, or allow
others to do so, for United States Government purposes. The Department
of Energy will provide public access to these results of federally
sponsored research in accordance with the DOE Public Access Plan. D.B.U.
acknowledges support from AFRL Information Directorate under Grant No.
FA 8750-11-2-0218; D.B.U. and L.K. acknowledge support from the NSF
under Grant No. PHY-1005709; and P.M.A., M.L.F., and A.M.S. would like
to thank AFOSR for support of this work. Any opinions, findings, and
conclusions or recommendations expressed in this material are those of
the authors and do not necessarily reflect the views of AFRL.
NR 21
TC 2
Z9 2
U1 1
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
EI 1094-1622
J9 PHYS REV A
JI Phys. Rev. A
PD JUN 15
PY 2015
VL 91
IS 6
AR 062318
DI 10.1103/PhysRevA.91.062318
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA CK3QA
UT WOS:000356129400005
ER
PT J
AU Katta, VR
Blunck, DL
Jiang, NB
Lynch, A
Gord, JR
Roy, S
AF Katta, Viswanath R.
Blunck, David L.
Jiang, Naibo
Lynch, Amy
Gord, James R.
Roy, Sukesh
TI On flames established with air jet in cross flow of fuel-rich combustion
products
SO FUEL
LA English
DT Article
DE Jet-in-cross-flow; Film-cooling; Diffusion flame; Autoignition;
Preferential diffusion
ID INVERSE DIFFUSION FLAMES; ENGINE DURABILITY IMPACTS; SECONDARY
COMBUSTION; CHEMICAL-KINETICS; RATIO COMBUSTORS; NITRIC-OXIDE; HEAT
RELEASE; TURBINE; SIMULATION; STABILITY
AB Advances in combustor technologies are driving aircraft gas turbine engines to operate at higher pressures, temperatures and equivalence ratios. A viable approach for protecting the combustor from the high-temperature environment is to inject air through the holes drilled on the surfaces. However, it is possible that the air intended for cooling purposes may react with fuel-rich combustion products and may increase heat flux. Air Force Research Laboratory (AFRL) has developed an experimental rig for studying the flames formed between the injected cold air and the cross flow of combustion products. Laser-based OH measurements revealed an upstream shift for the flames when the air injection velocity was increased and downstream shift when the fuel content in the cross flow was increased. As conventional understanding of the flame stability does not explain such shifts in flame anchoring location, a time-dependent, detailed-chemistry computational-fluid-dynamics model is used for identifying the mechanisms that are responsible. Combustion of propane fuel with air is modeled using a chemical-kinetics mechanism involving 52 species and 544 reactions. Calculations reveled that the flames in the film-cooling experiment are formed through autoignition process. Simulations have reproduced the various flame characteristics observed in the experiments. Numerical results are used for explaining the non-intuitive shifts in flame anchoring location to the changes in blowing ratio and equivalence ratio. The higher diffusive mass transfer rate of hydrogen in comparison to the local heat transport enhances H-2-O-2 mixing compared to thermal dissipation rate, which, in turn, affects the autoignition process. While increasing the blowing ratio abates the differences resulting from non-equal mass and heat transport rates, higher concentrations of hydrogen in the fuel-rich cross flows accelerate those differences. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Katta, Viswanath R.] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
[Blunck, David L.] Oregon State Univ, Corvallis, OR 97331 USA.
[Jiang, Naibo; Roy, Sukesh] Spectral Energies LLC, Dayton, OH 45431 USA.
[Lynch, Amy; Gord, James R.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Katta, VR (reprint author), Innovat Sci Solut Inc, 7610 McEwen Rd, Dayton, OH 45459 USA.
EM vrkatta@gmail.com
FU Air Force Contract [FA8650-12-C-2236]; Air Force Office for Scientific
Research
FX Financial support for this work was provided by the Air Force Contract
#FA8650-12-C-2236 (Ms. Amy Lynch) and by the Air Force Office for
Scientific Research (Dr. Chiping Li).
NR 31
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Z9 6
U1 2
U2 32
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0016-2361
EI 1873-7153
J9 FUEL
JI Fuel
PD JUN 15
PY 2015
VL 150
BP 360
EP 369
DI 10.1016/j.fuel.2015.02.006
PG 10
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA CE3FA
UT WOS:000351710400043
ER
PT J
AU Dastidar, IG
Khademi, V
Bieler, TR
Pilchak, AL
Crimp, MA
Boehlert, CJ
AF Dastidar, I. G.
Khademi, V.
Bieler, T. R.
Pilchak, A. L.
Crimp, M. A.
Boehlert, C. J.
TI The tensile and tensile-creep deformation behavior of Ti-8Al-1Mo-1V(wt%)
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE In-situ SEM; EBSD; Tension; Creep; Titanium alloy; Deformation mode
ID INDIVIDUAL WIDMANSTATTEN COLONIES; TITANIUM-ALLOY; HETEROGENEOUS
DEFORMATION; TEMPERATURE CREEP; ALPHA-TITANIUM; SLIP; PLASTICITY;
MECHANISM; SYSTEMS
AB The deformation behavior of titanium (Ti) can be complex due to the lower crystal symmetry of the hexagonal a phase compared with metals based on cubic phases. The tensile and tensile-creep deformation behavior of a Ti-8Al-1Mo-1V(wt%) alloy with a weak crystallographic texture was investigated in-situ straining scanning electron microscopy. Tensile experiments were performed at room temperature (RT), 260 degrees C, 455 degrees C, and 650 degrees C, while tensile-creep experiments were performed at 370 degrees C and 455 degrees C. Electron backscattered diffraction (EBSD) was performed both before and after the deformation, and slip trace analysis was used to identify the activation of the slip modes as a function of temperature and the associated global-stress-state Schmid factors. While extensive slip was characterized during the tensile tests, no twinning was observed. During the RT tensile tests the majority of the slip observed was on prismatic planes, while the relative activity of basal slip increased with temperature, such that at 455 degrees C, basal slip and prismatic slip were equally active. Some grain boundary and triple point cracking occurred during the elevated-temperature tensile deformation, while less slip activity and more grain boundary ledge formation were observed during the tensile-creep deformation. During tensile-creep, basal slip was more prevalent than prismatic slip and some transgranular cracks formed. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Dastidar, I. G.; Khademi, V.; Bieler, T. R.; Crimp, M. A.; Boehlert, C. J.] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA.
[Pilchak, A. L.] AFRL RXCM, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Khademi, V.] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
RP Boehlert, CJ (reprint author), Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA.
EM boehlert@egr.msu.edu
FU United States Department of Energy, Office of Basic Energy Science
[DE-FG02-10ER46637]
FX This research was supported by the United States Department of Energy,
Office of Basic Energy Science through Grant no. DE-FG02-10ER46637.
NR 28
TC 2
Z9 2
U1 4
U2 22
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD JUN 11
PY 2015
VL 636
BP 289
EP 300
DI 10.1016/j.msea.2015.03.059
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA CK0HK
UT WOS:000355886100036
ER
PT J
AU Nan, TX
Emori, S
Boone, CT
Wang, XJ
Oxholm, TM
Jones, JG
Howe, BM
Brown, GJ
Sun, NX
AF Nan, Tianxiang
Emori, Satoru
Boone, Carl T.
Wang, Xinjun
Oxholm, Trevor M.
Jones, John G.
Howe, Brandon M.
Brown, Gail J.
Sun, Nian X.
TI Comparison of spin-orbit torques and spin pumping across NiFe/Pt and
NiFe/Cu/Pt interfaces
SO PHYSICAL REVIEW B
LA English
DT Article
ID OSCILLATOR DRIVEN; EFFECTIVE-FIELD; MAGNETIZATION; VECTOR
AB We experimentally investigate spin-orbit torques and spin pumping in NiFe/Pt bilayers with direct and interrupted interfaces. The dampinglike and fieldlike torques are simultaneously measured with spin-torque ferromagnetic resonance tuned by a dc-bias current, whereas spin pumping is measured electrically through the inverse spin-Hall effect using a microwave cavity. Insertion of an atomically thin Cu dusting layer at the interface reduces the dampinglike torque, fieldlike torque, and spin pumping by nearly the same factor of approximate to 1.4. This finding confirms that the observed spin-orbit torques predominantly arise from diffusive transport of spin current generated by the spin-Hall effect. We also find that spin-current scattering at the NiFe/Pt interface contributes to additional enhancement in magnetization damping that is distinct from spin pumping.
C1 [Nan, Tianxiang; Emori, Satoru; Wang, Xinjun; Oxholm, Trevor M.; Sun, Nian X.] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
[Boone, Carl T.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Jones, John G.; Howe, Brandon M.; Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Nan, TX (reprint author), Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
EM s.emori@neu.edu; n.sun@neu.edu
RI Nan, Tianxiang/O-3820-2015; Nan, Tianxiang/A-8020-2016; Sun, Nian
Xiang/F-9590-2010
OI Sun, Nian Xiang/0000-0002-3120-0094
FU Air Force Research Laboratory [FA8650-14-C-5706, FA8650-14-C-5705]; W.M.
Keck Foundation; National Natural Science Foundation of China (NSFC)
[51328203]
FX This work was supported by the Air Force Research Laboratory through
Contract No. FA8650-14-C-5706 and, in part, by Contract No.
FA8650-14-C-5705, the W.M. Keck Foundation, and the National Natural
Science Foundation of China (NSFC) Grant No. 51328203. Lithography was
performed in the George J. Kostas Nanoscale Technology and Manufacturing
Research Center. S.E. thanks X. Fan and C.-F. Pai for helpful
discussions. T.N. and S.E. thank J. Zhou and B. Chen for assistance in
setting up the ST-FMR system and V. Sun for assistance in graphic
design.
NR 67
TC 23
Z9 23
U1 13
U2 72
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD JUN 11
PY 2015
VL 91
IS 21
AR 214416
DI 10.1103/PhysRevB.91.214416
PG 9
WC Physics, Condensed Matter
SC Physics
GA CK1KX
UT WOS:000355967300004
ER
PT J
AU Gopalswamy, N
Makela, P
Akiyama, S
Yashiro, S
Xie, H
Thakur, N
Kahler, SW
AF Gopalswamy, N.
Maekelae, P.
Akiyama, S.
Yashiro, S.
Xie, H.
Thakur, N.
Kahler, S. W.
TI LARGE SOLAR ENERGETIC PARTICLE EVENTS ASSOCIATED WITH FILAMENT ERUPTIONS
OUTSIDE ACTIVE REGIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE shock waves; Sun: coronal mass ejections (CMEs); Sun: filaments,
prominences; Sun: flares; Sun: particle emission; Sun: radio radiation
ID CORONAL MASS EJECTIONS; SHOCK FORMATION; SOHO MISSION; CYCLE 24; RADIO;
SPACE; WAVES; ACCELERATION; SPECTRA; BURSTS
AB We report on four large filament eruptions (FEs) from solar cycles 23 and 24 that were associated with large solar energetic particle (SEP) events and interplanetary type II radio bursts. The post-eruption arcades corresponded mostly to C-class soft X-ray enhancements, but an M1.0 flare was associated with one event. However, the associated coronal mass ejections (CMEs) were fast (speeds similar to 1000 km s(-1)) and appeared as halo CMEs in the coronagraph field of view. The interplanetary type II radio bursts occurred over a wide wavelength range, indicating the existence of strong shocks throughout the inner heliosphere. No metric type II bursts were present in three events, indicating that the shocks formed beyond 2-3 Rs. In one case, there was a metric type II burst with low starting frequency, indicating a shock formation height of similar to 2 Rs. The FE-associated SEP events did have softer spectra (spectral index >4) in the 10-100 MeV range, but there were other low-intensity SEP events with spectral indices >= 4. Some of these events are likely FE-SEP events, but were not classified as such in the literature because they occurred close to active regions. Some were definitely associated with large active region flares, but the shock formation height was large. We definitely find a diminished role for flares and complex type III burst durations in these large SEP events. Fast CMEs and shock formation at larger distances from the Sun seem to be the primary characteristics of the FE-associated SEP events.
C1 [Gopalswamy, N.; Maekelae, P.; Akiyama, S.; Yashiro, S.; Xie, H.; Thakur, N.] NASA, Goddard Space Flight Ctr, Solar Phys Lab, Greenbelt, MD 20771 USA.
[Maekelae, P.; Akiyama, S.; Yashiro, S.; Xie, H.; Thakur, N.] Catholic Univ Amer, Washington, DC 20064 USA.
[Kahler, S. W.] Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Gopalswamy, N (reprint author), NASA, Goddard Space Flight Ctr, Solar Phys Lab, Greenbelt, MD 20771 USA.
EM nat.gopalswamy@nasa.gov
FU NASA/LWS program; NSF [AGS-1358274]; NASA [NNX15AB77G, NNX15AB70G]
FX We thank the Big Bear Solar Observatory and the Hida Observatory for
making their H-alpha data available on line. We thank NOAA/NGDC for
making the GOES proton data available. This work benefitted greatly from
the open data policy of NASA. STEREO is a mission in NASA's Solar
Terrestrial Probes program. SOHO is a project of international
collaboration between ESA and NASA. The work of N.G., S.Y., S.A., and
N.T. was supported by NASA/LWS program. P. M. was partially supported by
NSF grant AGS-1358274 and NASA grant NNX15AB77G. H.X. was partially
supported by NASA grant NNX15AB70G.
NR 45
TC 15
Z9 15
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JUN 10
PY 2015
VL 806
IS 1
AR 8
DI 10.1088/0004-637X/806/1/8
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CL2XF
UT WOS:000356810300008
ER
PT J
AU Zhang, YY
de La Harpe, K
Beckstead, AA
Improta, R
Kohler, B
AF Zhang, Yuyuan
de La Harpe, Kimberly
Beckstead, Ashley A.
Improta, Roberto
Kohler, Bern
TI UV-Induced Proton Transfer between DNA Strands
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TRANSFER EXCITED-STATES; BASE-PAIR; ELECTRON-TRANSFER; CHARGE
SEPARATION; PULSE-RADIOLYSIS; NATURAL DNA; AB-INITIO; B-DNA;
SPECTROSCOPY; DYNAMICS
AB UV radiation creates excited status DNA that lead to mutagenic photoptoducts. Photoexcitation of single-stranded DNA can transfer an electron between stacked bases, but the fate of excited states in the double helix has been intensely debated. Here, photoinduced interstrand proton transfer (PT) triggered by intrastrand electron transfer (ET) is detected for the first time by time-resolved vibrational spectroscopy and quantum mechanical calculations. Long-lived excited states are shown to be oppositely charged base pair radical ions. In two of the duplexes, the base pair radical anions are present as tautomers formed by interstrand PT. Charge recombination occurs on the picosecond time scale preventing the accumulation of damaging radicals or mutagenic tautomers.
C1 [Zhang, Yuyuan; Beckstead, Ashley A.; Kohler, Bern] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
[de La Harpe, Kimberly] US Air Force Acad, Dept Phys, USAF Acad, Colorado Springs, CO 80840 USA.
[Improta, Roberto] Ist Biostrutture Bioimmagini, Consiglio Natl Ric, I-80136 Naples, Italy.
RP Improta, R (reprint author), Ist Biostrutture Bioimmagini, Consiglio Natl Ric, Via Mezzocannone 16, I-80136 Naples, Italy.
EM robimp@unina.it; kohler@chemistry.montana.edu
RI Zhang, Yuyuan/D-6376-2013; Kohler, Bern/A-1728-2011
OI Kohler, Bern/0000-0001-5353-1655
FU NSF [CHE-1112560]; NASA [NNX12AG77G]; M. J. Murdock Charitable Trust;
Italian Ministero dell'Istruzione, dell'Universita e della Ricerca
(MIUR) [PRIN-2010ERFKXL]; French Agency for Research
[ANR-12-BS08-0001-01]
FX Work at Montana State University was supported by NSF (CHE-1112560) and
NASA (NNX12AG77G). The TRIR spectrometer was constructed with funding
from the M. J. Murdock Charitable Trust. R.I. was supported by the
Italian Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR
Grants PRIN-2010ERFKXL), and French Agency for Research Grant
ANR-12-BS08-0001-01. The TOC graphic was prepared using the UCSF Chimera
package.34
NR 34
TC 30
Z9 30
U1 6
U2 71
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JUN 10
PY 2015
VL 137
IS 22
BP 7059
EP 7062
DI 10.1021/jacs.5b03914
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA CK6EW
UT WOS:000356322300022
PM 26005794
ER
PT J
AU Ding, L
Melodia, T
Batalama, SN
Matyjas, JD
AF Ding, Lei
Melodia, Tommaso
Batalama, Stella N.
Matyjas, John D.
TI Distributed resource allocation in cognitive and cooperative ad hoc
networks through joint routing, relay selection and spectrum allocation
SO COMPUTER NETWORKS
LA English
DT Article
DE Cooperative communications; Cognitive ad hoc networks; Dynamic spectrum
allocation; Cross-layer design
ID RADIO NETWORKS; WIRELESS NETWORKS; THROUGHPUT; DIVERSITY; STRATEGIES
AB Cooperative relaying and dynamic-spectrum-access/cognitive techniques are promising solutions to increase the capacity and reliability of wireless links by exploiting the spatial and frequency diversity of the wireless channel. Yet, the combined use of cooperative relaying and dynamic spectrum access in multi-hop networks with decentralized control is far from being well understood.
We study the problem of network throughput maximization in cognitive and cooperative ad hoc networks through joint optimization of routing, relay assignment and spectrum allocation. We derive a decentralized algorithm that solves the power and spectrum allocation problem for two common cooperative transmission schemes, decode-and-forward (DF) and amplify-and-forward (AF), based on convex optimization and arithmetic-geometric mean approximation techniques. We then propose and design a practical medium access control protocol in which the probability of accessing the channel for a given node depends on a local utility function determined as the solution of the joint routing, relay selection, and dynamic spectrum allocation problem. Therefore, the algorithm aims at maximizing the network throughput through local control actions and with localized information only.
Through discrete-event network simulations, we finally demonstrate that the protocol provides significant throughput gains with respect to baseline solutions. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Ding, Lei; Batalama, Stella N.] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
[Melodia, Tommaso] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
[Matyjas, John D.] US Air Force Res Lab, RIGF, Rome, NY 13441 USA.
RP Ding, L (reprint author), SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
EM leiding@buffalo.edu; melodia@ece.neu.edu; batalama@buffalo.edu;
john.matyjas@rl.af.mil
FU Air Force Research Laboratory [FA8750-14-1-0074]
FX This work was supported by the Air Force Research Laboratory under
Contract FA8750-14-1-0074. A preliminary version of this paper [1]
appeared in the Proc. of IEEE Intl. Conf. on Sensor, Mesh and Ad Hoc
Communications and Networks (SECON) 2010.
NR 65
TC 0
Z9 1
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1389-1286
EI 1872-7069
J9 COMPUT NETW
JI Comput. Netw.
PD JUN 4
PY 2015
VL 83
BP 315
EP 331
DI 10.1016/j.comnet.2015.02.027
PG 17
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Engineering, Electrical & Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA CL8LU
UT WOS:000357227000021
ER
PT J
AU Deiner, LJ
Rottmayer, MA
Eigenbrodt, BC
AF Deiner, L. Jay
Rottmayer, Michael A.
Eigenbrodt, Bryan C.
TI The effect of milling additives on powder properties and sintered body
microstructure of NiO
SO JOURNAL OF ADVANCED CERAMICS
LA English
DT Article
DE nickel oxide; impact milling; sintering; densification; grain growth
ID OXIDE FUEL-CELL; X-RAY PHOTOELECTRON; NICKEL-OXIDE; HYDROGEN STORAGE;
PARTICLE-SIZE; YSZ ANODES; NANOPARTICLES; CARBON; XPS; PERFORMANCE
AB The evolution of powder particle size, crystal structure, and surface chemistry was evaluated for micron scale NiO powders subjected to impact milling with commonly employed milling additives: methanol, Vertrel XF, and amorphous carbon. The effect of the different comminution protocols on sintered body microstructure was evaluated for high temperature sintering in inert atmosphere (N-2). X-ray photoelectron spectroscopy showed that NiO powder surface chemistry is surprisingly sensitive to milling additive choice. In particular, the proportion of powder surface defect sites varied with additive, and methanol left an alcohol or alkoxy residue even after drying. Upon sintering to intermediate temperatures (1100 degrees C), scanning electron microscopy (SEM) showed that slurry milled NiO powders exhibit hindered sintering behaviors. This effect was amplified for NiO milled with methanol, in which sub-500 nm grain sizes dominated even after sintering to 1100 degrees C. Upon heating to high temperatures (1500 degrees C), simultaneous differential scanning calorimetry/thermogravimetric analysis (DSC/TGA) showed that the powders containing carbon residues undergo carbothermal reduction, resulting in a melting transition between 1425 and 1454 degrees C. Taken together, the results demonstrated that when processing metal oxide powders for advanced ceramics, the choice of milling additive is crucial as it exerts significant control over sintered body microstructure.
C1 [Deiner, L. Jay] CUNY, New York City Coll Technol, Dept Chem, 300 Jay St, Brooklyn, NY 11201 USA.
[Rottmayer, Michael A.] US Air Force, Res Labs, Wright Patterson AFB, OH 45433 USA.
[Eigenbrodt, Bryan C.] Villanova Univ, Dept Chem, Villanova, PA 19085 USA.
RP Deiner, LJ (reprint author), CUNY, New York City Coll Technol, Dept Chem, 300 Jay St, Brooklyn, NY 11201 USA.
EM Ldeiner@citytech.cuny.edu
FU N.Y.S. Graduate Research and Teaching Initiative (GRTI); Air Force
Summer Faculty Fellowship program
FX The authors thank the N.Y.S. Graduate Research and Teaching Initiative
(GRTI) for financial support. L. J. D. thanks the Air Force Summer
Faculty Fellowship program for fellowship support. The authors thank the
Advanced Imaging Facility of the College of Staten Island for SEM
images, and Prof. William L'Amoreaux and Dr. Mike Bucaro for their help
with SEM images.
NR 49
TC 0
Z9 0
U1 2
U2 7
PU TSINGHUA UNIV PRESS
PI BEIJING
PA TSINGHUA UNIV, RM A703, XUEYAN BLDG, BEIJING, 10084, PEOPLES R CHINA
SN 2226-4108
EI 2227-8508
J9 J ADV CERAM
JI J. Adv. Ceram.
PD JUN
PY 2015
VL 4
IS 2
BP 142
EP 151
DI 10.1007/s40145-015-0147-z
PG 10
WC Materials Science, Ceramics
SC Materials Science
GA DE1XL
UT WOS:000370419900009
ER
PT J
AU Lee, JH
Lin, KC
Eklund, D
AF Lee, Jinho
Lin, Kuo-Cheng
Eklund, Dean
TI Challenges in Fuel Injection for High-Speed Propulsion Systems
SO AIAA JOURNAL
LA English
DT Article
ID SUPERSONIC CROSS-FLOWS; INDUCED IODINE FLUORESCENCE; LARGE-EDDY
SIMULATION; LIQUID JETS; TRANSVERSE INJECTION; AEROSPACE PROPULSION;
TURBULENT PRANDTL; SCRAMJET ENGINES; SCHMIDT NUMBERS; PRIMARY BREAKUP
C1 [Lee, Jinho] NASA, John H Glenn Res Ctr, Cleveland, OH 44135 USA.
[Lin, Kuo-Cheng] Taitech Inc, Beavercreek, OH 45430 USA.
[Eklund, Dean] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Lee, JH (reprint author), NASA, John H Glenn Res Ctr, Cleveland, OH 44135 USA.
FU Hypersonic Propulsion Element of Fundamental Hypersonic Program; U.S.
Air Force Research Laboratory's Robust Scramjet Program
FX This work was sponsored by the Hypersonic Propulsion Element of the
Fundamental Hypersonic Program under the leadership of A. Auslander and
R. Gaffney (Associate Principal Investigators) and J. Pittman (Principal
Investigator). The sponsorship of T. Jackson and R. Mercier under the
auspices of the U.S. Air Force Research Laboratory's Robust Scramjet
Program is also gratefully acknowledged.
NR 121
TC 0
Z9 0
U1 2
U2 6
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUN
PY 2015
VL 53
IS 6
BP 1405
EP 1423
DI 10.2514/1.J053280
PG 19
WC Engineering, Aerospace
SC Engineering
GA CH9WD
UT WOS:000354386200001
ER
PT J
AU Rizzetta, DP
Visbal, MR
AF Rizzetta, Donald P.
Visbal, Miguel R.
TI Plasma-Based Flow Control for Delay of Excrescence-Generated Transition
SO AIAA JOURNAL
LA English
DT Article
ID LARGE-EDDY SIMULATION; NAVIER-STOKES EQUATIONS; GLOW-DISCHARGE PLASMA;
BOUNDARY-LAYER; NUMERICAL-SIMULATION; SCHEMES; TURBULENCE; ACTUATORS
AB Numerical simulations are carried out to explore flow control that delays transition generated by excrescence on a platelike geometry in subsonic flow. Both forward-facing and rearward-facing steps of small roughness heights are considered in the simulations. These are representative of joints and other surface imperfections on wing sections that disrupt laminar flow, thereby increasing skin friction and drag. Dielectric barrier discharge plasma-based flow control is employed to delay transition and increase the extent of the laminar flow region. Solutions are obtained to the Navier-Stokes equations, which were augmented by source terms used to characterize the body force imparted by a plasma actuator on the fluid. A simple phenomenological model provided these forces resulting from the electric field generated by the plasma. The numerical method is based upon a high-order numerical scheme and an implicit time-marching approach on overset mesh systems used to describe the steps. Very small-amplitude numerical forcing is applied to generate perturbations, which are amplified by the geometric disturbances and result in transition, similar to the physical situation. Both continuous and pulsed operations of actuators are investigated. Features of the flowfields are described, and comparisons are provided between the baseline and control cases. It is found that use of plasma actuators can maintain laminar flow for the entire length of the computational domain, resulting in a reduction of the integrated drag by up to 70%.
C1 [Rizzetta, Donald P.; Visbal, Miguel R.] US Air Force, Res Lab, Aerodynam Technol Branch, AFRL RQVA, Wright Patterson AFB, OH 45433 USA.
RP Rizzetta, DP (reprint author), US Air Force, Res Lab, Aerodynam Technol Branch, AFRL RQVA, Wright Patterson AFB, OH 45433 USA.
FU U.S. Air Force Office of Scientific Research; U.S. Department of Defense
Supercomputing Resource Center at Stennis Space Center in Mississippi;
Wright-Patterson Air Force Base in Ohio
FX The work presented here was sponsored by the U.S. Air Force Office of
Scientific Research, under a task monitored by D. Smith. Computational
resources were supported in part by a grant of supercomputer time from
the U.S. Department of Defense Supercomputing Resource Centers at the
Stennis Space Center in Mississippi and Wright-Patterson Air Force Base
in Ohio. The authors are grateful to D. Garmann for assistance provided
in support of this work.
NR 36
TC 1
Z9 1
U1 2
U2 3
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUN
PY 2015
VL 53
IS 6
BP 1455
EP 1467
DI 10.2514/1.J053289
PG 13
WC Engineering, Aerospace
SC Engineering
GA CH9WD
UT WOS:000354386200005
ER
PT J
AU Stull, MC
Clemens, MS
AF Stull, Mamie C.
Clemens, Michael S.
TI Prosthetic Graft Patency in the Setting of a Polymicrobial Infection in
Swine (Sus scrofa)
SO JOURNAL OF VASCULAR SURGERY
LA English
DT Meeting Abstract
CT Vascular Annual Meeting
CY 2015
CL Chicago, IL
C1 [Stull, Mamie C.] US Air Force, San Antonio Mil Med Ctr, Ft Sam Houston, TX USA.
[Clemens, Michael S.] San Antonio Mil Med Ctr, San Antonio, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0741-5214
J9 J VASC SURG
JI J. Vasc. Surg.
PD JUN
PY 2015
VL 61
IS 6
SU S
MA PC208
BP 174S
EP 174S
PG 1
WC Surgery; Peripheral Vascular Disease
SC Surgery; Cardiovascular System & Cardiology
GA CS2FS
UT WOS:000361884200321
ER
PT J
AU Belmont, E
Ombrello, T
Brown, M
Carter, C
Ellzey, J
AF Belmont, Erica
Ombrello, Timothy
Brown, Michael
Carter, Campbell
Ellzey, Janet
TI Experimental and numerical investigation of freely propagating flames
stabilized on a Hencken Burner
SO COMBUSTION AND FLAME
LA English
DT Article
DE Laminar flames; Hencken burner; Sub-atmospheric pressure; Species
profiles; OH PLIF
ID BEAM MASS-SPECTROMETRY; HEAT-FLUX METHOD; ETHYLENE FLAME; HYDROCARBONS;
COMBUSTION; CHEMISTRY; MIXTURES; KINETICS; PROBES
AB Detailed flame measurements are necessary for the development of accurate chemical kinetics models. This study characterizes quasi one-dimensional, laminar, nearly adiabatic, and freely propagating flames stabilized over a Hencken flat flame burner. Major reactant and product species in lean premixed methane/oxygen/argon and ethylene/oxygen/argon flames were measured through extractive sampling and absorption spectroscopy to obtain spatially-resolved species profiles of oxygen, methane, ethylene, carbon monoxide and carbon dioxide. Experimental results were compared to numerical simulations of one-dimensional, freely propagating, adiabatic flames. Experimental and numerical results for flame speeds and species concentrations were largely in agreement within calculated uncertainty, indicating that data produced using a Hencken burner at sub-atmospheric pressure can be readily compared to numerical simulations without the need for flame or burner temperatures, which are prone to uncertainty. The influence of the extractive probe on flame structure was also investigated, and results suggest that the structure is less influenced by probe intrusion when the flame is highly stretched. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Belmont, Erica] Univ Wyoming, Dept Mech Engn, Laramie, WY 82071 USA.
[Ombrello, Timothy; Brown, Michael; Carter, Campbell] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH USA.
[Ellzey, Janet] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
RP Belmont, E (reprint author), Univ Wyoming, Dept Mech Engn, Laramie, WY 82071 USA.
EM ebelmont@uwyo.edu
NR 24
TC 2
Z9 2
U1 3
U2 11
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD JUN
PY 2015
VL 162
IS 6
BP 2679
EP 2685
DI 10.1016/j.combustflame.2015.03.025
PG 7
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA CQ4RP
UT WOS:000360592600032
ER
PT J
AU Kaufman, JR
Eismann, MT
Celenk, M
AF Kaufman, Jason R.
Eismann, Michael T.
Celenk, Mehmet
TI Assessment of Spatial-Spectral Feature-Level Fusion for Hyperspectral
Target Detection
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
SENSING
LA English
DT Article; Proceedings Paper
CT 6th Workshop on Hyperspectral Image and Signal Processing (WHISPERS)
CY JUN, 2014
CL Lausanne, SWITZERLAND
DE Hyperspectral imagery (HSI); image fusion; material identification;
pansharpening; spatial-spectral feature extraction; target
identification
ID MOMENT INVARIANTS; PATTERN-RECOGNITION; IMAGES; CLASSIFICATION;
ALGORITHMS
AB In this work, we assess the detection and classification of specially constructed targets in coincident airborne hyperspectral imagery (HSI) and high spatial resolution panchromatic imagery (HRI) in spectral, spatial, and joint spatial-spectral feature spaces. The target discrimination powers of the data-level and feature-level fusion of HSI and HRI are also directly compared in the spatial-spectral context using airborne imagery collected explicitly for this research. We show that in the case of Bobcat 2013 imagery, feature-level fusion of the HSI spectrum with spatial features derived from the coincident HRI data consistently results in fewer false alarms on the scene background as well as fewer misclassifications among the tested targets. Furthermore, this approach also outperforms schemes in which data-level fusion of the HSI and HRI imagery is performed prior to extracting spatial-spectral features.
C1 [Kaufman, Jason R.; Celenk, Mehmet] Ohio Univ, Sch Elect Engn & Comp Sci, Athens, OH 45701 USA.
[Eismann, Michael T.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Kaufman, JR (reprint author), Ohio Univ, Sch Elect Engn & Comp Sci, Athens, OH 45701 USA.
EM jkaufman@ieee.org
NR 27
TC 2
Z9 2
U1 2
U2 17
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
EI 2151-1535
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD JUN
PY 2015
VL 8
IS 6
SI SI
BP 2534
EP 2544
DI 10.1109/JSTARS.2015.2420651
PG 11
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
Photographic Technology
GA CO6JW
UT WOS:000359264000020
ER
PT J
AU Mancini, PM
Jones, AR
Granlund, KO
Ol, MV
AF Mancini, Peter M.
Jones, Anya R.
Granlund, Kenneth O.
Ol, Michael V.
TI Unsteady Aerodynamic Response of a Rapidly Started Flexible Wing
SO INTERNATIONAL JOURNAL OF MICRO AIR VEHICLES
LA English
DT Article
ID PERFORMANCE; KINEMATICS; AIRFOILS; VORTEX; FLIGHT
AB Effects of camber and camber-change due to elastic deflection for aspect ratio 4.25 wings were examined for the classical unsteady problem of rectilinear translational acceleration. Direct force measurements and flow visualization by laser illumination of fluorescent dye allowed for the tracking of force history vs. evolution of the flowfield of rigid flat, rigid cambered, and flexible membranous wings. At low incidence (10 degrees and below), Wagner's approximation provides an accurate prediction of the time-evolution of lift for the rigid wings, beyond which flow separation leads to peaks in the force history and the camber-effect is no longer additive to the incidence effect. Both the rigid uncambered and cambered wings reach peak lift at 35 degrees, whereas the flexible wing experiences a form of stall-delay and reaches peak lift at 50 degrees. Due to the aeroelasticity of the flexible membrane, flow over the suction surface remains attached for much higher incidence angles than for the rigid wings. For incidence angles less than 30 degrees, the flexible wing's peak lift is lower than that of its rigid counterparts. However, beyond 30 degrees, the flexible wing experiences an aeroelastically-induced stall delay that allows lift to exceed the rigid analogs.
C1 [Mancini, Peter M.; Jones, Anya R.] Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA.
[Granlund, Kenneth O.; Ol, Michael V.] US Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Mancini, PM (reprint author), Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA.
FU U.S. Army Research Laboratory under the Micro Autonomous Systems and
Technology (CTA-MAST) program; Air Force Office of Scientific Research
(AFOSR) under the AFOSR Summer Faculty Fellowship Program
FX This work was supported by the U.S. Army Research Laboratory under the
Micro Autonomous Systems and Technology (CTA-MAST) program, and the Air
Force Office of Scientific Research (AFOSR) under the AFOSR Summer
Faculty Fellowship Program.
NR 25
TC 0
Z9 0
U1 3
U2 5
PU MULTI-SCIENCE PUBL CO LTD
PI BRENTWOOD
PA 5 WATES WAY, BRENTWOOD CM15 9TB, ESSEX, ENGLAND
SN 1756-8293
J9 INT J MICRO AIR VEH
JI Int. J. Micro Air Veh.
PD JUN
PY 2015
VL 7
IS 2
BP 147
EP 157
PG 11
WC Engineering, Aerospace
SC Engineering
GA CN5QG
UT WOS:000358483500005
ER
PT J
AU Green, PF
Vaia, RA
Katz, HE
Russell, T
Salleo, A
Malliaras, G
AF Green, Peter F.
Vaia, Richard A.
Katz, Howard E.
Russell, Thomas
Salleo, Alberto
Malliaras, George
TI MRS Communications, Polymers and Soft Matter special issue, Part A The
functionality of polymers: fundamentals to technology Introduction
SO MRS COMMUNICATIONS
LA English
DT Editorial Material
C1 [Green, Peter F.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Vaia, Richard A.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Katz, Howard E.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Russell, Thomas] Univ Massachusetts, Amherst, MA 01003 USA.
[Salleo, Alberto] Stanford Univ, Stanford, CA 94305 USA.
[Malliaras, George] Ecole Natl Super Mines, St Etienne, France.
RP Green, PF (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.
NR 0
TC 0
Z9 0
U1 3
U2 8
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 2159-6859
EI 2159-6867
J9 MRS COMMUN
JI MRS Commun.
PD JUN
PY 2015
VL 5
IS 2
BP 95
EP 95
DI 10.1557/mrc.2015.45
PG 1
WC Materials Science, Multidisciplinary
SC Materials Science
GA CN1AK
UT WOS:000358147300001
ER
PT J
AU Grabowski, CA
Koerner, H
Vaia, RA
AF Grabowski, Christopher A.
Koerner, Hilmar
Vaia, Richard A.
TI Enhancing dielectric breakdown strength: structural relaxation of
amorphous polymers and nanocomposites
SO MRS COMMUNICATIONS
LA English
DT Article
ID ELECTRICAL ENERGY-STORAGE; ENTHALPY RECOVERY; NANOPARTICLES;
POLYSTYRENE; ASSEMBLIES; MATRIX; VOLUME
AB The thermal history of amorphous polymers near the glass-transition temperature determines the extent to which macromolecules structurally relax, and ultimately their properties. Here, we report the correlation between physical aging, dielectric breakdown, and capacitive energy storage of polystyrene, poly(methyl-methacrylate), and associated silica nanocomposites. Guided by enthalphic recovery rates, dielectric break-down strength increased from 20% to 40% when aged at T-g-10 degrees C before use. The generality of improvement and connection to enthalpic recovery afford a means to design pre-service processing of new polymers and additive manufacturing techniques to reduce excess volume within the glass; and thereby reduce initiation and inhibit propagation of electronic failure.
C1 [Grabowski, Christopher A.; Koerner, Hilmar; Vaia, Richard A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Grabowski, Christopher A.] UES Inc, Dayton, OH 45432 USA.
RP Vaia, RA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@us.af.mil
RI Ma, Shilei/A-2421-2016
FU Air Force Office of Scientific Research; Air Force Research Laboratory
Materials & Manufacturing Directorate
FX The authors thank the Air Force Office of Scientific Research and Air
Force Research Laboratory Materials & Manufacturing Directorate for
their financial support along with V. McNeir and J. DeCerbo for their
assistance with energy storage characterization, and C. Chi (Dupont de
Nemours & Co.) for colloidal silica samples. The authors also thank the
Bockstaller and Matyjaszewski groups (Carnegie Mellon University) and J.
S. Meth (DuPont) for supplying nanocomposite samples and images.
NR 25
TC 1
Z9 1
U1 4
U2 20
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 2159-6859
EI 2159-6867
J9 MRS COMMUN
JI MRS Commun.
PD JUN
PY 2015
VL 5
IS 2
BP 205
EP 210
DI 10.1557/mrc.2015.29
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA CN1AK
UT WOS:000358147300008
ER
PT J
AU Lee, KM
Tondiglia, VP
White, TJ
AF Lee, Kyung Min
Tondiglia, Vincent P.
White, Timothy J.
TI Bistable switching of polymer stabilized cholesteric liquid crystals
between transparent and scattering modes
SO MRS COMMUNICATIONS
LA English
DT Article
ID LIGHT SHUTTERS; TEXTURE; DISPLAYS
AB We report on the ability to switch an optical material composed of a polymer stabilized cholesteric liquid crystal (polymer stabilized cholesteric texture, PSCT) between stable transparent (reflective) and scattering modes. The degree of scattering is controllable with the strength of the applied electric field. The mechanism for bistable switching of the PSCT is distinguished from prior examinations by employing electromechanical displacement of a stabilizing polymer network. The stable transparent (reflective) or scattering modes are induced with a variety of driving schemes employing both alternating and direct current fields. The relative degree of scattering can be varied to allow for grayscale control potentially useful in smart window and display applications.
C1 [Lee, Kyung Min; Tondiglia, Vincent P.; White, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lee, Kyung Min] Azimuth Corp, Dayton, OH 45431 USA.
[Tondiglia, Vincent P.] Leidos, Beavercreek, OH 45431 USA.
RP White, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM Timothy.White.24@us.af.mil
FU Materials and Manufacturing Directorate of the Air Force Research
Laboratory
FX We acknowledge funding from the Materials and Manufacturing Directorate
of the Air Force Research Laboratory.
NR 25
TC 3
Z9 3
U1 4
U2 29
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 2159-6859
EI 2159-6867
J9 MRS COMMUN
JI MRS Commun.
PD JUN
PY 2015
VL 5
IS 2
BP 223
EP 227
DI 10.1557/mrc.2015.40
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA CN1AK
UT WOS:000358147300010
ER
PT J
AU Reames, DV
Cliver, EW
Kahler, SW
AF Reames, Donald V.
Cliver, Edward W.
Kahler, Stephen W.
TI Temperature of the Source Plasma for Impulsive Solar Energetic Particles
SO SOLAR PHYSICS
LA English
DT Article
DE Solar energetic particles; Solar flares; Coronal mass ejections; Solar
system abundances
ID CORONAL MASS EJECTIONS; MAGNETIC RECONNECTION MECHANISM; ABUNDANCE
ENHANCEMENTS; INTERPLANETARY SHOCKS; CHARGE STATES; HIGH-ENERGIES; IONIC
CHARGE; HEAVY-IONS; STOCHASTIC ACCELERATION; ELEMENTAL COMPOSITION
AB The steep power-law dependence of element abundance enhancements on the mass-to-charge ratios [] of the ions in impulsive solar energetic-particle (SEP) events causes these enhancements to reflect the temperature-dependent pattern of of the ions in the source plasma. We searched for SEP events from coronal plasma that is hotter or cooler than the limited region of 2.5 -aEuro parts per thousand 3.2 MK previously found to dominate 111 impulsive SEP events. Fifteen new events were found, four (three) originating in 2-MK (4-MK) plasma, but none from outside this temperature range. Although the impulsive SEP events are strongly associated with flares, this result indicates that these ions are not accelerated from flare-heated plasma, which can often exceed 10 MK. Evidently the ions of that we observe in space are accelerated from active-region plasma on open magnetic-field lines near the flare, but not from the closed loops of the flare. The power-law dependence of the abundance enhancements on of the ions is expected from theoretical models of acceleration from regions of magnetic reconnection.
C1 [Reames, Donald V.] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA.
[Cliver, Edward W.] Air Force Res Lab, Space Vehicles Directorate, Sunspot, NM 88349 USA.
[Kahler, Stephen W.] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
RP Reames, DV (reprint author), Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA.
EM dvreames@umd.edu; ecliver@nso.edu; stephen.kahler@kirtland.af.mil
FU AFOSR [15RV-COR167]
FX S. Kahler was funded by AFOSR Task 15RV-COR167.
NR 76
TC 5
Z9 5
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
EI 1573-093X
J9 SOL PHYS
JI Sol. Phys.
PD JUN
PY 2015
VL 290
IS 6
BP 1761
EP 1774
DI 10.1007/s11207-015-0711-2
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CM9YX
UT WOS:000358068200013
ER
PT J
AU Johnston, WR
O'Brien, TP
Ginet, GP
AF Johnston, W. Robert
O'Brien, T. Paul
Ginet, Gregory P.
TI Release of AE9/AP9/SPM Radiation Belt and Space Plasma Model Version
1.20.002
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT News Item
DE radiation belt model; space plasma model
C1 [Johnston, W. Robert] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[O'Brien, T. Paul] Aerosp Corp, Dept Space Sci, El Segundo, CA 90245 USA.
RP Johnston, WR (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM AFRL.RVBXR.AE9.AP9.Org.Mbx@us.af.mil; paul.obrien@aero.org;
gregory.ginet@ll.mit.edu
NR 0
TC 0
Z9 0
U1 2
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD JUN
PY 2015
VL 13
IS 6
BP 368
EP 368
DI 10.1002/2015SW001212
PG 1
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA CM8NT
UT WOS:000357959400005
ER
PT J
AU Mbonimpa, EG
Gautam, S
Lai, L
Kumar, S
Bonta, JV
Wang, X
Rafique, R
AF Mbonimpa, E. G.
Gautam, S.
Lai, L.
Kumar, S.
Bonta, J. V.
Wang, X.
Rafique, R.
TI Combined PEST and Trial-Error approach to improve APEX calibration
SO COMPUTERS AND ELECTRONICS IN AGRICULTURE
LA English
DT Article
DE APEX; PEST; Trial and error; Calibration; Surface runoff
ID HYDROLOGIC-MODELS; WATER-QUALITY; RUNOFF; CROPLAND; OPTIMIZATION;
CONSERVATION; VALIDATION; LANDSCAPES; SIMULATION; EROSION
AB The Agricultural Policy Environmental eXtender (APEX), a comprehensive hydrologic model well-suited for small watersheds, requires understanding of the input parameters for improved calibration. The "trial and error" method for calibrating the APEX model has been used very commonly in previous studies. In this study, the automatic calibration software Parameter Estimation (PEST) was combined with the conventional trial-and-error method to improve APEX calibration. The proposed Combined PEST and Trial Error (CPTE) approach can overcome: (i) weaknesses of "Trial Error' method in terms of tediousness and subjectivity involved in the decision to end a calibration, and (ii) drawback of PEST in that it may lead to biased simulation due to ignoring local specific condition. A case study was developed to verify the CPTE approach. The results based on APEX runoff simulation indicate that the CPTE approach greatly improved the calibration of APEX model with respect to model performance criteria. Coupling inverse modeling and trial error manual method can be an efficient and effective alternative in calibrating the APEX model. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Mbonimpa, E. G.; Gautam, S.; Lai, L.; Kumar, S.] S Dakota State Univ, Dept Plant Sci, Brookings, SD 57007 USA.
[Mbonimpa, E. G.] US Air Force, Dept Syst Engn & Management, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Bonta, J. V.] USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA.
[Wang, X.] Texas AgriLife Res, Blackland Res & Extens Ctr, Temple, TX USA.
[Rafique, R.] Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD 20740 USA.
[Gautam, S.] Univ Missouri, Dept Bioengn, Columbia, MO 56211 USA.
RP Kumar, S (reprint author), S Dakota State Univ, Dept Plant Sci, Brookings, SD 57007 USA.
EM Sandeep.Kumar@sdstate.edu
FU USDA-NIFA [OHO01089-SS]
FX Authors would like to acknowledge the US Department of Agriculture
(USDA)-ARS personnel for providing hydrology data for this study. This
research is part of a project supported by the USDA-NIFA, Project No.
OHO01089-SS, "Quantifying the spatial location of small-scale land
management changes in large watersheds using hydrological modeling".
NR 50
TC 1
Z9 1
U1 5
U2 7
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0168-1699
EI 1872-7107
J9 COMPUT ELECTRON AGR
JI Comput. Electron. Agric.
PD JUN
PY 2015
VL 114
BP 296
EP 303
DI 10.1016/j.compag.2015.04.014
PG 8
WC Agriculture, Multidisciplinary; Computer Science, Interdisciplinary
Applications
SC Agriculture; Computer Science
GA CL8RI
UT WOS:000357241400031
ER
PT J
AU Wang, ZT
Gary, DE
Fleishman, GD
White, SM
AF Wang, Zhitao
Gary, Dale E.
Fleishman, Gregory D.
White, Stephen M.
TI CORONAL MAGNETOGRAPHY OF A SIMULATED SOLAR ACTIVE REGION FROM MICROWAVE
IMAGING SPECTROPOLARIMETRY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona; Sun: magnetic fields; Sun: radio radiation
ID SLOWLY CHANGING COMPONENT; MAGNETIC-FIELD; 3-DIMENSIONAL STRUCTURE;
GYRORESONANCE EMISSION; RADIO EMISSION; MODEL; FLARE; ARRAY
AB We have simulated the Expanded Owens Valley Solar Array (EOVSA) radio images generated at multiple frequencies from a model solar active region, embedded in a realistic solar disk model, and explored the resulting data cube for different spectral analysis schemes to evaluate the potential for realizing one of EOVSA's most important scientific goals-coronal magnetography. In this paper, we focus on modeling the gyroresonance and free-free emission from an on-disk solar active region model with realistic complexities in electron density, temperature and magnetic field distribution. We compare the magnetic field parameters extrapolated from the image data cube along each line of sight after folding through the EOVSA instrumental profile with the original (unfolded) parameters used in the model. We find that even the most easily automated, image-based analysis approach (Level-0) provides reasonable quantitative results, although they are affected by systematic effects due to finite sampling in the Fourier (UV) plane. Finally, we note the potential for errors due to misidentified harmonics of the gyrofrequency, and discuss the prospects for applying a more sophisticated spectrally based analysis scheme (Level-1) to resolve the issue in cases where improved UV coverage and spatial resolution are available.
C1 [Wang, Zhitao; Gary, Dale E.; Fleishman, Gregory D.] New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA.
[White, Stephen M.] Air Force Res Lab, Albuquerque, NM USA.
RP Wang, ZT (reprint author), New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
EM dgary@njit.edu
OI Gary, Dale/0000-0003-2520-8396
FU NSF grant [AST-1312802, AGS-1262772, AGS-1250374]; NASA grant
[NNX11AB49G, NNX14AC87G]
FX This work was supported in part by NSF grants AST-1312802, AGS-1262772,
and AGS-1250374, and NASA grants NNX11AB49G and NNX14AC87G to New Jersey
Institute of Technology.
NR 39
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U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JUN 1
PY 2015
VL 805
IS 2
AR 93
DI 10.1088/0004-637X/805/2/93
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CL1PG
UT WOS:000356715400008
ER
PT J
AU Ramirez, JI
Li, YYV
Basantani, H
Leedy, K
Bayraktaroglu, B
Jessen, GH
Jackson, TN
AF Ramirez, J. Israel
Li, Yuanyuan V.
Basantani, Hitesh
Leedy, Kevin
Bayraktaroglu, Burhan
Jessen, Gregg H.
Jackson, Thomas N.
TI Radiation-Hard ZnO Thin Film Transistors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Cobalt-60; gamma rays; irradiation; oxide semiconductor; polycrystalline
ZnO; radiation-hard; thin film transistors (TFTs); ZnO
ID IRRADIATION; STRESS; DAMAGE
AB We report effects for up to 100 Mrad (SiO2) gamma-ray exposure on polycrystalline ZnO thin film transistors (TFTs) deposited by two different techniques. The radiation related TFT changes, either with or without electrical bias during irradiation, are primarily a negative V-ON shift and a smaller V-T shift (Delta V-ON similar to -2.5V and Delta V-T similar to -1.5V for 100 Mrad (SiO2) exposure). Field-effect mobility remains nearly unchanged. Both, V-ON and V-T shifts are nearly completely removed by annealing at 200 degrees C for 1 minute and some recovery is seen even at room temperature. We find that our ZnO TFTs are insensitive to electrical bias during irradiation; that is, unbiased measurements are useful worst case test results. To the best of our knowledge, these are the most radiation-hard thin film transistors reported to date.
C1 [Ramirez, J. Israel; Jackson, Thomas N.] Penn State Univ, Ctr Thin Film Devices, University Pk, PA 16802 USA.
[Ramirez, J. Israel; Jackson, Thomas N.] Penn State Univ, Mat Res Inst, Dept Elect Engn, University Pk, PA 16802 USA.
[Li, Yuanyuan V.; Basantani, Hitesh] Penn State Univ, University Pk, PA 16802 USA.
[Leedy, Kevin; Bayraktaroglu, Burhan; Jessen, Gregg H.] AFRL RYDD, Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Ramirez, JI (reprint author), Penn State Univ, Ctr Thin Film Devices, University Pk, PA 16802 USA.
EM ramirez@psu.edu
FU Department of the Defense, Defense Threat Reduction Agency
FX The assistance of Candace Davison and the Radiation Science and
Engineering Center at Penn State University is gratefully acknowledged.
The project or effort depicted was or is sponsored by the Department of
the Defense, Defense Threat Reduction Agency. The content of the
information does not necessarily reflect the position or the policy of
the federal government, and no official endorsement should be inferred.
NR 27
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U1 2
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD JUN
PY 2015
VL 62
IS 3
BP 1399
EP 1404
DI 10.1109/TNS.2015.2417831
PN 3
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA CK8AP
UT WOS:000356459900027
ER
PT J
AU Fajardo, KA
Zorich, SC
Voss, JD
Thervil, JW
AF Fajardo, Kevin A.
Zorich, Shauna C.
Voss, Jameson D.
Thervil, Jeffrey W.
TI Pneumonia Outbreak Caused by Chlamydophila pneumoniae among US Air Force
Academy Cadets, Colorado, USA
SO EMERGING INFECTIOUS DISEASES
LA English
DT Article
ID INFECTION
AB During October 2013 May 2014, there were 102 cases of pneumonia diagnosed in US Air Force Academy cadets. A total of 73% of tested nasal washes contained Chlamydophila pneumoniae. This agent can be considered to be present on campus settings during outbreaks with numerous, seemingly disconnected cases of relatively mild pneumonia.
C1 [Fajardo, Kevin A.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Zorich, Shauna C.; Voss, Jameson D.; Thervil, Jeffrey W.] US Air Force Sch Aerosp Med, Wright Patterson AFB, OH USA.
[Thervil, Jeffrey W.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
RP Fajardo, KA (reprint author), US Air Force Acad, Prevent Med, Colorado Springs, CO 80840 USA.
EM kevin.fajardo@us.af.mil
NR 9
TC 2
Z9 2
U1 0
U2 1
PU CENTERS DISEASE CONTROL
PI ATLANTA
PA 1600 CLIFTON RD, ATLANTA, GA 30333 USA
SN 1080-6040
EI 1080-6059
J9 EMERG INFECT DIS
JI Emerg. Infect. Dis
PD JUN
PY 2015
VL 21
IS 6
BP 1049
EP 1051
DI 10.3201/eid2106.141394
PG 3
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA CJ3MA
UT WOS:000355386900020
PM 25988545
ER
PT J
AU Yu, K
Phillips, DM
Baur, JW
Qi, HJ
AF Yu, Kai
Phillips, David M.
Baur, Jeffery W.
Qi, H. Jerry
TI Analysis of shape-memory polymer composites with embedded microvascular
system for fast thermal response
SO JOURNAL OF COMPOSITE MATERIALS
LA English
DT Article
DE Microvascular heating system; shape-memory polymers; shape-memory
effects; constitutive modeling
ID MAGNETIC NANOPARTICLE DESIGN; CROSS-LINKED POLYMERS; THERMOMECHANICAL
BEHAVIOR; RELAXATION MECHANISMS; CONSTITUTIVE MODEL; STRESS-RELAXATION;
PART I; RECOVERY; NANOCOMPOSITES; NETWORKS
AB The microvascular strategy demonstrates unique advantages in shape-memory polymer applications as it can achieve both rapid thermal activation and deactivation during a typical shape-memory cycle. In addition, localized overheating can be avoided in comparison with other heating methods, such as the magnetic and electric heating. In this paper, a finite-element-based computational analysis was performed to study the rapid thermal response of shape-memory polymer composites with an embedded microvascular system. We show that the polymer shape-fixing speed, the shape fixity after a given cooling time, and the shape-recovery rate are significantly enhanced due to the rapid cooling and heating effect of internal microvasculature. The effect of the composite dimensions and microvascular channel arrangement on the activation and deactivation was studied. Typically, reducing the composite thickness and tube spacing increases the shape-recovery speed of the shape-memory polymer composite by effectively reducing the length of the thermal conduction pathways. Strategies for achieving an optimized tube arrangement were also discussed based on the considerations of the system mass and thermal boundary conditions. The results in this paper provide a guideline for further designs and applications of shape-memory polymer composites with embedded microvasculature.
C1 [Yu, Kai; Qi, H. Jerry] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[Yu, Kai; Qi, H. Jerry] Georgia Inst Technol, Sch Mech Engn, Atlanta, GA 30332 USA.
[Phillips, David M.; Baur, Jeffery W.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
[Phillips, David M.] Universal Technol Corp, Mat & Mfg, Dayton, OH USA.
RP Qi, HJ (reprint author), Georgia Inst Technol, Sch Mech Engn, Atlanta, GA 30332 USA.
EM qih@me.gatech.edu
RI Yu, Kai/A-1540-2015
FU AFOSR [FA9550-13-1-0088]
FX This work is supported by an AFOSR grant no. FA9550-13-1-0088.
NR 69
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Z9 3
U1 5
U2 19
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0021-9983
EI 1530-793X
J9 J COMPOS MATER
JI J. Compos Mater.
PD JUN
PY 2015
VL 49
IS 15
SI SI
BP 1881
EP 1893
DI 10.1177/0021998314540194
PG 13
WC Materials Science, Composites
SC Materials Science
GA CJ8NM
UT WOS:000355759700009
ER
PT J
AU Blaha, LM
Houpt, JW
AF Blaha, Leslie M.
Houpt, Joseph W.
TI An extension of workload capacity space for systems with more than two
channels
SO JOURNAL OF MATHEMATICAL PSYCHOLOGY
LA English
DT Article
DE Workload; Capacity; Human information processing; Race model
ID DIVIDED ATTENTION; REDUNDANT-SIGNALS; PARALLEL
AB We provide the n-channel extension of the unified workload capacity space bounds for standard parallel processing models with minimum-time, maximum-time, and single-target self-terminating stopping rules. This extension enables powerful generalizations of this approach to multiple stopping rules and any number of channels of interest. Mapping the bounds onto the unified capacity space enables a single plot to be used to compare the capacity coefficient values to the upper and lower bounds on standard parallel processing in order to make direct inferences about extreme workload capacity. Published by Elsevier Inc.
C1 [Blaha, Leslie M.] Air Force Res Lab, Warfighter Interface Div, Wright Patterson AFB, OH 45433 USA.
[Houpt, Joseph W.] Wright State Univ, Dept Psychol, Dayton, OH 45435 USA.
RP Blaha, LM (reprint author), Air Force Res Lab, Warfighter Interface Div, Wright Patterson AFB, OH 45433 USA.
EM leslie.blaha@us.af.mil; joseph.houpt@wright.edu
FU AFOSR [12RH14COR, FA9550-13-1-0087]
FX This research was supported by AFOSR grant 12RH14COR to L.M.B and AFOSR
FA9550-13-1-0087 to J.W.H. Distribution A: Approved for public release;
distribution unlimited. 88ABW Cleared 01/17/2014; 88ABW-2014-0140.
NR 12
TC 1
Z9 1
U1 1
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-2496
EI 1096-0880
J9 J MATH PSYCHOL
JI J. Math. Psychol.
PD JUN
PY 2015
VL 66
BP 1
EP 5
DI 10.1016/j.jmp.2015.01.002
PG 5
WC Mathematics, Interdisciplinary Applications; Social Sciences,
Mathematical Methods; Psychology, Mathematical
SC Mathematics; Mathematical Methods In Social Sciences; Psychology
GA CJ7ZD
UT WOS:000355718000001
ER
PT J
AU Siefring, CL
Bernhardt, PA
James, HG
Parris, RT
AF Siefring, Carl L.
Bernhardt, Paul A.
James, H. Gordon
Parris, Richard Todd
TI The CERTO Beacon on CASSIOPE/e-POP and Experiments Using High-Power HF
Ionospheric Heaters
SO SPACE SCIENCE REVIEWS
LA English
DT Review
DE CERTO beacon; Total electron content; Scintillations; Ionospheric
tomography; Radio physics; Ionospheric physics; Ionosphere heating;
Field aligned irregularities
ID STIMULATED ELECTROMAGNETIC EMISSIONS; RADIO-WAVE PROPAGATION;
TOMOGRAPHY; SCINTILLATION; MISSION; PLASMA; DEPLETIONS; DENSITY; HAARP
AB A new Coherent Electromagnetic Radio Tomography (CERTO) beacon is on the CASSIOPE satellite and part of the enhanced-Polar Outflow Probe (e-POP) suite of scientific instruments. CERTO signals can be used to measure ionospheric Total Electron Content (TEC) and radio scintillations along propagation paths between CERTO and receivers. The combination of CERTO and the array of e-POP in-situ diagnostics form a powerful tool for studying ionospheric plasma processes that have not been previously possible. Of note, the combination CERTO and the Radio Receiver Instrument (RRI), a modern digital receiver, which measures between 10 Hz to 18 MHz in selectable bands allows for innovative High Frequency (HF) radio propagation experiments. The use of high-power HF ionospheric heating facilities for such experiments further allows for repeatable studies of a number of important plasma processes. The new CERTO beacon transmits un-modulated, phase-coherent waves at 150, 400, and 1067 MHz with either right-hand-circular or linear polarization and TEC is measured using either differential phase and/or Faraday rotation. With a linear array of CERTO receivers, TEC data can be used for tomographic imaging of the ionosphere yielding two-dimensional maps of the plasma below the satellite orbit. In addition, the three CERTO frequencies cover a wide range for determination of radio scintillation effects caused by diffraction from propagation through ionospheric irregularities. We will describe the CERTO beacon and several potential innovative experiments using HF heating facilities in conjunction with CERTO, the RRI and other e-POP instruments.
C1 [Siefring, Carl L.; Bernhardt, Paul A.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[James, H. Gordon] Univ Calgary, Calgary, AB T2N 1N4, Canada.
[Parris, Richard Todd] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Siefring, CL (reprint author), Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM carl.siefring@nrl.navy.mil
FU NRL Base Program; Canadian Space Agency; University of Calgary
FX The CERTO work was accomplished with financial support of the NRL Base
Program in cooperation with the Canadian Space Agency and the University
of Calgary. We would like to acknowledge efforts by our engineer Matthew
R. Wilkens and Brett Stephens of AFRL for ground receiver data, and the
assistance of HAARP personal especially Mike McCarrick and Lee Snyder.
Finally, we are grateful for the support of CASSIOPE/e-POP crew at
University of Calgary, particularly, PI Andrew Yau, Greg Enno and Andrew
Howarth.
NR 35
TC 2
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U1 0
U2 6
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-6308
EI 1572-9672
J9 SPACE SCI REV
JI Space Sci. Rev.
PD JUN
PY 2015
VL 189
IS 1-4
BP 107
EP 122
DI 10.1007/s11214-014-0110-2
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CK1PU
UT WOS:000355980100008
ER
PT J
AU Luo, H
Du, Y
Hu, Z
Cooper, WL
Lu, H
AF Luo, H.
Du, Y.
Hu, Z.
Cooper, W. L.
Lu, H.
TI High-Strain Rate Compressive Behavior of Glass Beads Under Confinement
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE Glass beads; Nanoindentation; Young's modulus; Hardness; Fracture
toughness; Long split Hopkinson pressure bar (SHPB); Water content;
Particle size; Compression; Confinement
ID HOPKINSON PRESSURE BAR; GRANULAR-MATERIALS; MECHANICAL-PROPERTIES;
ELASTIC-MODULUS; EGLIN SAND; DEFORMATION; MODEL; NANOINDENTATION;
INDENTATION; CERAMICS
AB Glass beads are often used to examine simulation models for granular materials. The dynamic behavior of glass beads, however, has not been characterized accurately. In this paper, the dynamic behavior is characterized at high strain rates. To describe the beads used in these experiments, the size distribution was measured, and the bead-level mechanical properties were determined by nanoindentation. The dynamic compressive behavior of glass beads under confinement was characterized at strain rates near 400 s(-1) using a long split Hopkinson pressure bar. The glass beads were confined inside a hollow cylinder of hardened steel and capped by cemented tungsten carbide cylindrical rods. The assembly was subjected to repeated shaking and tapping to consolidate the glass beads to attain a given bulk mass density. Experiments were conducted on dry unsorted beads at three initial mass densities (1.46, 1.54 and 1.61 g/cm(3)), sorted beads at three sizes (0.30, 0.212, and 0.106 mm), and partially saturated beads with average bead size of 0.212 mm at five water contents (0, 7, 14, 18 and 22 % by weight). Effect of initial mass density, bead size and water content on the dynamic volumetric and deviatoric response was investigated. The impacted beads were sorted for analysis of the particle size distribution. The compressibility was characterized in terms of the void ratio as a function of the axial pressure.
C1 [Luo, H.; Du, Y.; Hu, Z.; Lu, H.] Univ Texas Dallas, Dept Mech Engn, Richardson, TX 75080 USA.
[Cooper, W. L.] US Air Force, Res Lab, Kirtland Air Force Base, Albuquerque, NM 87116 USA.
RP Lu, H (reprint author), Univ Texas Dallas, Dept Mech Engn, Richardson, TX 75080 USA.
EM hongbing.lu@utdallas.edu
RI Lu, Hongbing/A-1312-2011
FU ONR Multidisciplinary University Research Initiative program (MURI)
[N00014-11-1-0691]; DOE Nuclear Energy University Program (NEUP)
[09818]; NSF [CMMI-0928363, CMMI-1031829, ECSS-1307997]
FX We acknowledge the support of ONR Multidisciplinary University Research
Initiative program (MURI) grant N00014-11-1-0691, DOE Nuclear Energy
University Program (NEUP) grant 09818, and NSF under CMMI-0928363,
CMMI-1031829 and ECSS-1307997. Lu also thanks the Louis A. Beecherl, Jr.
Chair for additional support.
NR 44
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U1 3
U2 16
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
EI 1741-2765
J9 EXP MECH
JI Exp. Mech.
PD JUN
PY 2015
VL 55
IS 5
BP 935
EP 950
DI 10.1007/s11340-015-9995-2
PG 16
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA CH7IA
UT WOS:000354208000011
ER
PT J
AU Gockel, BT
Caton, MJ
Jha, SK
Szczepanski, CJ
Rosenberger, AH
Burba, ME
AF Gockel, B. T.
Caton, M. J.
Jha, S. K.
Szczepanski, C. J.
Rosenberger, A. H.
Burba, M. E.
TI Developing the Capability to Monitor Small Fatigue Crack Growth Under
Elevated Temperature, Ultra-High Vacuum Conditions
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE Fatigue crack growth; Ni-base superalloy; Ultra-high vacuum;
Environmental effects; Small fatigue cracks
ID LOW-CYCLE FATIGUE; IN-100 SUPERALLOY; STRESS RATIO; BEHAVIOR;
ENVIRONMENT; FREQUENCY; ALLOY-718
AB It has been reported that the minimum observed fatigue lifetimes in numerous structural alloys are dominated by the small-crack growth behavior. While environmental effects on fatigue crack growth behavior of Ni-base superalloys are well documented within the literature, the published research is largely limited to long crack behavior due to the difficulty of measuring small cracks in a vacuum chamber. A testing capability incorporating optical measurement of small fatigue cracks under ultra-high vacuum (similar to 10(-9) Torr) and at elevated temperatures has been developed. Optical measurement capabilities have been evaluated under laboratory air conditions to determine crack measurement accuracy. A vacuum fatigue test was then completed at 650 A degrees C on a Ni-base superalloy specimen to quantify the effect of vacuum on the propagation life within the small crack regime. The effectiveness of this test capability and considerations for this technique are discussed.
C1 [Gockel, B. T.; Caton, M. J.; Szczepanski, C. J.; Rosenberger, A. H.; Burba, M. E.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Gockel, B. T.; Burba, M. E.] Univ Dayton, Dayton, OH 45469 USA.
[Jha, S. K.] Universal Technol Corp, Dayton, OH 45432 USA.
RP Gockel, BT (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM brian.gockel.1@us.af.mil
FU AFOSR Structural Mechanics Program [2306-6M2AL8]; Dayton Area Graduate
Studies Institute (DAGSI) fellowship; Air Force [FA8650-07-D-5800]
FX This work was performed at the Air Force Research Laboratory, Materials
and Manufacturing Directorate, AFRL/RXCM, Wright Patterson Air Force
Base, OH. Partial financial support from the AFOSR Structural Mechanics
Program (Project # 2306-6M2AL8), Dr. David Stargel, program manager, is
gratefully acknowledged. Two of the authors (BTG, MEB) would like to
acknowledge funding from the Dayton Area Graduate Studies Institute
(DAGSI) fellowship. Two of the authors were partially supported under
onsite Air Force contracts FA8650-07-D-5800 (SKJ and CJS). Technical
assistance in experimental design and setup from M. Ruddell and P.
Blosser, both of the University of Dayton Research Institute (UDRI) is
appreciated.
NR 28
TC 0
Z9 0
U1 1
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
EI 1741-2765
J9 EXP MECH
JI Exp. Mech.
PD JUN
PY 2015
VL 55
IS 5
BP 951
EP 961
DI 10.1007/s11340-015-9998-z
PG 11
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA CH7IA
UT WOS:000354208000012
ER
PT J
AU Grasmick, JG
Mooney, MA
Surdahl, RW
Voth, M
Senseney, CT
AF Grasmick, Jacob G.
Mooney, Michael A.
Surdahl, Roger W.
Voth, Michael
Senseney, Christopher T.
TI Capturing a Layer Response during the Curing of Stabilized Earthwork
Using a Multiple Sensor Lightweight Deflectometer
SO JOURNAL OF MATERIALS IN CIVIL ENGINEERING
LA English
DT Article
DE Curing; Earthwork; Probe instruments; Deflection; In situ tests;
Nondestructive tests; Pavements; Soil stabilization; Curing; Layered
soils; Transportation engineering
AB The lightweight deflectometer (LWD) is a portable device that measures surface deflections and applied force, from which dynamic stiffness and elastic modulus can be estimated. The inclusion of radial offset sensors with LWD testing, referred to here as multiple sensor LWD testing, stemmed from the well-established falling weight deflectometer (FWD) testing method. However, little research exists in the literature addressing LWD use on stabilized or lightly bound layers with multiple sensors, or exploring the applicability of backcalculating/isolating layer moduli from multiple sensor LWD tests. To this end, over 200 multiple sensor LWD tests on stabilized base materials were performed at five sites and rigorously analyzed to determine if the test could capture growth in stabilized base stiffness while the underlying subgrade layer remained unchanged. Deflection results demonstrate that the LWD test is capable of detecting changes in the stiffness of the stabilized base material during curing as illustrated by the decreasing magnitude in center deflections. Furthermore, radial offset deflections measuring 60cm from the plate center remained constant during curing, providing valuable information about the subgrade support. The findings made directly from the deflections were confirmed via an analytical backcalculation using Boussinesq's equations and Odemark's method of equivalent thickness. The use of multiple sensor LWD testing allows for a richer interpretation of earthwork behavior than the traditional center deflection LWD results.
C1 [Grasmick, Jacob G.; Mooney, Michael A.] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
[Surdahl, Roger W.; Voth, Michael] Fed Highway Adm, Cent Fed Lands Highway Div, Lakewood, CO 80228 USA.
[Senseney, Christopher T.] US Air Force Acad, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
RP Grasmick, JG (reprint author), Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA.
EM jgrasmic@mines.edu
RI Senseney, Christopher/L-8061-2015
FU Federal Highway Administration; Central Federal Lands Division
FX The authors would like to acknowledge the Federal Highway Administration
and the Central Federal Lands Division for the technical and financial
support of this study, and David Stamp for his contributions to the
study.
NR 27
TC 1
Z9 1
U1 1
U2 6
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0899-1561
EI 1943-5533
J9 J MATER CIVIL ENG
JI J. Mater. Civ. Eng.
PD JUN
PY 2015
VL 27
IS 6
AR 04014183
DI 10.1061/(ASCE)MT.1943-5533.0001137
PG 12
WC Construction & Building Technology; Engineering, Civil; Materials
Science, Multidisciplinary
SC Construction & Building Technology; Engineering; Materials Science
GA CI2CL
UT WOS:000354552400004
ER
PT J
AU Vernon, PJ
Paredes, RM
Crossland, R
Schaub, LJ
Lucca, JJD
Sheppard, FR
AF Vernon, P. J.
Paredes, R. M.
Crossland, R.
Schaub, L. J.
Lucca, J. J. Dalle
Sheppard, F. R.
TI RAPID DETECTION OF LEUKOCYTE OXIDATIVE BURST CAPACITY CORRELATES WITH
TH1-POLARIZING CYTOKINE SECRETION AFTER EX-VIVO LPS STIMULATION OF
NON-HUMAN PRIMATE (RHESUS MACAQUE)
SO SHOCK
LA English
DT Meeting Abstract
CT 38th Annual Conference of the Shock-Society on Shock
CY JUN 06-09, 2015
CL Denver, CO
SP Shock Soc
C1 [Vernon, P. J.; Paredes, R. M.; Crossland, R.; Schaub, L. J.; Sheppard, F. R.] Naval Med Res Unit San Antonio, San Antonio, TX USA.
[Lucca, J. J. Dalle] US Air Force, Med Wing 59, Jbsa Ft Sam Houston, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 1073-2322
EI 1540-0514
J9 SHOCK
JI Shock
PD JUN
PY 2015
VL 43
IS 6
SU 1
MA P182
BP 110
EP 110
PG 1
WC Critical Care Medicine; Hematology; Surgery; Peripheral Vascular Disease
SC General & Internal Medicine; Hematology; Surgery; Cardiovascular System
& Cardiology
GA CI4QC
UT WOS:000354736000219
ER
PT J
AU Paredes, RM
Vernon, PJ
Crossland, R
Macko, AR
Burdette, AJ
Lucca, JJD
Sheppard, FR
AF Paredes, R. M.
Vernon, P. J.
Crossland, R.
Macko, A. R.
Burdette, A. J.
Lucca, J. J. Dalle
Sheppard, F. R.
TI INFLAMMATORY PROFILE IN RESPONSE TO UNCONTROLLED HEMORRHAGE IN A
NON-HUMAN PRIMATE (RHESUS MACAQUE) MODEL
SO SHOCK
LA English
DT Meeting Abstract
CT 38th Annual Conference of the Shock-Society on Shock
CY JUN 06-09, 2015
CL Denver, CO
SP Shock Soc
C1 [Paredes, R. M.; Vernon, P. J.; Crossland, R.; Macko, A. R.; Burdette, A. J.; Sheppard, F. R.] Naval Med Res Unit San Antonio, San Antonio, TX USA.
[Lucca, J. J. Dalle] US Air Force, Med Wing 59, Jbsa Ft Sam Houston, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 1073-2322
EI 1540-0514
J9 SHOCK
JI Shock
PD JUN
PY 2015
VL 43
IS 6
SU 1
MA P187
BP 112
EP 112
PG 1
WC Critical Care Medicine; Hematology; Surgery; Peripheral Vascular Disease
SC General & Internal Medicine; Hematology; Surgery; Cardiovascular System
& Cardiology
GA CI4QC
UT WOS:000354736000224
ER
PT J
AU Heimbuch, BK
Harnish, DA
Balzli, C
Lumley, A
Kinney, K
Wander, JD
AF Heimbuch, B. K.
Harnish, D. A.
Balzli, C.
Lumley, A.
Kinney, K.
Wander, J. D.
TI Aerosol-phase activity of iodine captured from a triiodide resin filter
on fine particles containing an infectious virus
SO JOURNAL OF APPLIED MICROBIOLOGY
LA English
DT Article
DE antimicrobials; contact-release mechanism; iodine; MS2 coli phage;
respiratory protection; viruses
ID DISINFECTANT; BIOAEROSOLS; INFLUENZA; WATER
AB AimsTo avoid interference by water-iodine disinfection chemistry and measure directly the effect of iodine, captured from a triiodide complex bound to a filter medium, on viability of penetrating viral particles.
Methods and ResultsAerosols of MS2 coli phage were passed through control P100 or iodinated High-Efficiency Particulate Air media, collected in plastic bags, incubated for 0-10min, collected in an impinger containing thiosulphate to consume all unreacted iodine, plated and enumerated. Comparison of viable counts demonstrated antimicrobial activity with an apparent half-life for devitalization in tens of seconds; rate of kill decreased at low humidity and free iodine was captured by the bags.
ConclusionsThe results support the mechanism of near-contact capture earlier proposed; however, the disinfection chemistry in the aerosol phase is very slow on the time scale of inhalation.
Significance and Impact of the StudyThis study shows that disinfection by filter-bound iodine in the aerosol phase is too slow to be clinically significant in individual respiratory protection, but that it might be of benefit to limit airborne transmission of infections in enclosed areas.
C1 [Heimbuch, B. K.; Harnish, D. A.; Lumley, A.; Kinney, K.] Appl Res Associates, Panama City, FL USA.
[Balzli, C.] Universal Technol Corp, Mat & Mfg Div, Dayton, OH USA.
[Wander, J. D.] Air Force Civil Engineer Ctr, Tyndall AFB, FL 32403 USA.
US Dept Agr, Southeast Poultry Res Lab, Agr Res Stn, Athens, GA 30605 USA.
RP Wander, JD (reprint author), Air Force Civil Engineer Ctr, Requirements & Acquisit Div, 139 Barnes Dr,Suite 2, Tyndall AFB, FL 32403 USA.
EM joseph.wander@us.af.mil
FU Defense Threat Reduction Agency
FX Samples of the iodinated resin medium were generously provided by
Triosyn Corp., Williston, VT. Invaluable technical assistance was
provided by Air Force Academy Cadet (now First Lieutenant) Erlyn Rudico.
Dr Mohammed Ali contributed to initial experiments in this effort. This
project was supported in part by the Defense Threat Reduction Agency,
Chemical and Biological Defense program, under the title Reactive Air
Purification for Individual and Collective Protection.
NR 28
TC 1
Z9 1
U1 1
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1364-5072
EI 1365-2672
J9 J APPL MICROBIOL
JI J. Appl. Microbiol.
PD JUN
PY 2015
VL 118
IS 6
BP 1315
EP 1320
DI 10.1111/jam.12788
PG 6
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA CI2IT
UT WOS:000354570600007
PM 25739420
ER
PT J
AU Doman, DB
Oppenheimer, MW
Rone, W
AF Doman, David B.
Oppenheimer, Michael W.
Rone, William
TI Selective Self-Locking Actuator and Control Allocation Approach for
Thermal Load Minimization
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Editorial Material
C1 [Doman, David B.; Oppenheimer, Michael W.; Rone, William] US Air Force, Res Lab, Autonomous Control Branch, Wright Patterson AFB, OH 45433 USA.
RP Doman, DB (reprint author), US Air Force, Res Lab, Autonomous Control Branch, 2210 Eighth St,Bldg 146,Rm 305, Wright Patterson AFB, OH 45433 USA.
EM david.doman@us.af.mil; michael.oppenheimer@us.af.mil
NR 13
TC 0
Z9 0
U1 0
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JUN
PY 2015
VL 38
IS 6
BP 1110
EP 1117
DI 10.2514/1.G000859
PG 8
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CI2ZC
UT WOS:000354615900011
ER
PT J
AU Smith, NE
Cobb, RG
Pierce, SJ
Raska, VM
AF Smith, Nathan E.
Cobb, Richard G.
Pierce, Scott J.
Raska, Vincent M.
TI Uncertainty Corridors for Three-Dimensional Collision Avoidance
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Guidance, Navigation, and Control Conference
CY JAN 13-17, 2014
CL National Harbor, MD
SP AIAA
ID TRAJECTORY OPTIMIZATION; CONFLICT-RESOLUTION; AUTONOMOUS VEHICLES;
ALGORITHM; AIRCRAFT
C1 [Smith, Nathan E.; Cobb, Richard G.; Pierce, Scott J.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Raska, Vincent M.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Smith, NE (reprint author), US Air Force, Dept Aeronaut & Astronaut, Washington, DC 20330 USA.
NR 36
TC 0
Z9 0
U1 0
U2 7
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JUN
PY 2015
VL 38
IS 6
BP 1156
EP 1162
DI 10.2514/1.G000459
PG 7
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CI2ZC
UT WOS:000354615900018
ER
PT J
AU Silverstrim, KJ
Schneider, E
van der Hoeven, C
AF Silverstrim, Kelli J.
Schneider, Erich
van der Hoeven, Christopher
TI Image Optimization in Digital Dental Radiography
SO HEALTH PHYSICS
LA English
DT Article
DE medical radiation; patient protection; radiation dose; x-ray imaging
ID INTRAORAL RADIOGRAPHY; RADIOLOGY; DENSITY; FILTERS
AB Presented is a method for establishing the appropriate balance of image quality and radiation dose for dental imaging. Using the Monte Carlo N-Particle Extended (MCNPX) radiation transport code, the DC Planmeca radiographic unit and a dental bitewing phantom were modeled. The Carestream 6100 RVG sensor signal response, noise response, dose rate dependence, and reproducibility were determined experimentally, including uncertainties and inter/intraunit variabilities. The computationally varied parameters were peak kilovoltage and tube filtration. The entrance air kerma for the current clinical technique was used to establish reference image quality. Four figures of merit (FOM) were chosen to encompass parameter variation. With equal weighting of FOMs and no equipment limitations, the optimal parameters were 90 kVp with 0.1 mm added copper filtration. The optimal technique in the radiographic units' operating range was 70 kVp and 0.1 mm added copper filtration, resulting in a approximate to 50% (+/- 17%) entrance dose and approximate to 40% effective dose savings.
C1 [Silverstrim, Kelli J.; Schneider, Erich; van der Hoeven, Christopher] Univ Texas Austin, Nucl Engn Teaching Lab, Austin, TX 78758 USA.
[Silverstrim, Kelli J.] US Air Force Acad, Med Grp 10, Colorado Springs, CO 80840 USA.
RP van der Hoeven, C (reprint author), Univ Texas Austin, Nucl Engn Teaching Lab, Bldg 159,10100 Burnet Rd, Austin, TX 78758 USA.
EM cvanderh@gmail.com
NR 31
TC 0
Z9 0
U1 1
U2 9
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD JUN
PY 2015
VL 108
IS 6
BP 580
EP 591
DI 10.1097/HP.0000000000000273
PG 12
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA CH9AQ
UT WOS:000354328800003
PM 25905519
ER
PT J
AU Al-Rjoub, MF
Roy, AK
Ganguli, S
Banerjee, RK
AF Al-Rjoub, Marwan F.
Roy, Ajit K.
Ganguli, Sabyasachi
Banerjee, Rupak K.
TI Improved Flow Rate in Electro-Osmotic Micropumps for Combinations of
Substrates and Different Liquids With and Without Nanoparticles
SO JOURNAL OF ELECTRONIC PACKAGING
LA English
DT Article
DE EOF pump; EOF; micropump; thermal management; silicon-PDMS
ID CONVECTIVE HEAT-TRANSFER; PUMP; MICROCHANNELS; FABRICATION
AB A new design for an electro-osmotic flow (EOF) driven micropump was fabricated. Considering thermal management applications, three different types of micropumps were tested using multiple liquids. The micropumps were fabricated from a combination of materials, which included: silicon-polydimethylsiloxane (Si-PDMS), Glass-PDMS, or PDMS-PDMS. The flow rates of the micropumps were experimentally and numerically assessed. Different combinations of materials and liquids resulted in variable values of zeta-potential. The ranges of zeta-potential for Si-PDMS, Glass-PDMS, and PDMS-PDMS were -42.5--50.7 mV, -76.0--88.2 mV, and -76.0--103.0 mV, respectively. The flow rates of the micropumps were proportional to their zeta-potential values. In particular, flow rate values were found to be linearly proportional to the applied voltages below 500 V. A maximum flow rate of 75.9 lL/min was achieved for the Glass-PDMS micropump at 1 kV. At higher voltages nonlinearity and reduction in flow rate occurred due to Joule heating and the axial electro-osmotic current leakage through the silicon substrate. The fabricated micropumps could deliver flow rates, which were orders of magnitude higher compared to the previously reported values for similar size micropumps. It is expected that such an increase in flow rate, particularly in the case of the Si-PDMS micropump, would lead to enhanced heat transfer for microchip cooling applications as well as for applications involving micrototal analysis systems (mu TAS).
C1 [Al-Rjoub, Marwan F.; Banerjee, Rupak K.] Univ Cincinnati, Sch Dynam Syst, Cincinnati, OH 45221 USA.
[Roy, Ajit K.; Ganguli, Sabyasachi] Air Force Res Lab, Nanoelect Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Banerjee, RK (reprint author), Univ Cincinnati, Sch Dynam Syst, 593 Rhodes Hall, Cincinnati, OH 45221 USA.
EM alrjoumf@mail.uc.edu; ajit.roy@wpafb.af.mil;
sabyasachi.ganguli.2@us.af.mil; rupak.banerjee@uc.edu
FU Air Force Research Laboratory [10-587-0084-01-C1]
FX This research was partially funded by the Air Force Research Laboratory
(Grant No. 10-587-0084-01-C1). We are grateful to Soumyarwit Manna for
helping in ESEM imaging the microchannels using ESEM.
NR 26
TC 2
Z9 2
U1 4
U2 10
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1043-7398
EI 1528-9044
J9 J ELECTRON PACKAGING
JI J. Electron. Packag.
PD JUN
PY 2015
VL 137
IS 2
AR 021001
DI 10.1115/1.4028746
PG 11
WC Engineering, Electrical & Electronic; Engineering, Mechanical
SC Engineering
GA CH3WZ
UT WOS:000353963000001
ER
PT J
AU Arendt, DL
Blaha, LM
AF Arendt, Dustin L.
Blaha, Leslie M.
TI Opinions, influence, and zealotry: a computational study on stubbornness
SO COMPUTATIONAL AND MATHEMATICAL ORGANIZATION THEORY
LA English
DT Article
DE Dimer automaton; Innovation diffusion; Opinion dynamics; Influence
maximization; Zealot
ID CELLULAR-AUTOMATA; SYSTEMS; DYNAMICS; INNOVATION; DIFFUSION; MODELS
AB We present a simple, efficient, and predictive model for opinion dynamics with zealots. Our model captures curvature-driven dynamics (e.g., clear, smooth boundaries separating domains whose curvature decreases over time) through a simple, individual rule, providing a method for rapidly testing basic hypotheses about innovation diffusion, opinion dynamics, and related phenomena. Our model belongs to a class of models called dimer automata, which are asynchronous, graph-based (i.e., non-uniform lattice) variants of cellular automata. Individuals in the model update their states via a dyadic update rule; population opinion dynamics emerge from these pairwise interactions. Zealots are stubborn individuals whose opinion is not susceptible to influence by others. We observe experimentally that a system without zealots usually converges to the majority opinion, but a relatively small number of zealots can sway the opinion of the whole population. The influence of zealots can be further increased by placing zealots at more effective locations within the network. These locations can be determined by rankings from standard social network analysis metrics, or by using a greedy algorithm for influence maximization. We apply the influence maximization technique to a politically polarized social network to explore opinion dynamics in a real-world network and to gain insight about influence and political entrenchment through the zealot model's ability to sway the entire network to one side or the other.
C1 [Arendt, Dustin L.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Blaha, Leslie M.] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Arendt, DL (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM dustin.arendt@pnnl.gov; leslie.blaha@us.af.mil
FU AFOSR LRIR [12RH12COR]; National Research Council Research Associateship
Award at the Air Force Research Laboratory
FX Distribution A: Approved for public release; distribution unlimited.
88ABW cleared 11/08/2013; 88 ABW-2013-4691. This work was supported by
AFOSR LRIR 12RH12COR to L.M.B. This research was performed while D.L.A.
held a National Research Council Research Associateship Award at the Air
Force Research Laboratory.
NR 41
TC 7
Z9 7
U1 0
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1381-298X
EI 1572-9346
J9 COMPUT MATH ORGAN TH
JI Comput. Math. Organ. Theory
PD JUN
PY 2015
VL 21
IS 2
BP 184
EP 209
DI 10.1007/s10588-015-9181-1
PG 26
WC Computer Science, Interdisciplinary Applications; Mathematics,
Interdisciplinary Applications; Social Sciences, Mathematical Methods
SC Computer Science; Mathematics; Mathematical Methods In Social Sciences
GA CG7EX
UT WOS:000353466500003
ER
PT J
AU Militello, LG
Sushereba, CE
Branlat, M
Bean, R
Finomore, V
AF Militello, Laura G.
Sushereba, Christen E.
Branlat, Matthieu
Bean, Robert
Finomore, Victor
TI Designing for military pararescue: Naturalistic decision-making
perspective, methods, and frameworks
SO JOURNAL OF OCCUPATIONAL AND ORGANIZATIONAL PSYCHOLOGY
LA English
DT Article
ID SUPPORT-SYSTEMS; AUTOMATION; SENSE; MODEL
AB Naturalistic decision-making (NDM) research offers important guidance for designing information technology to be used by people who conduct extreme activities in extreme environments, such as military special operators. Recent advances in technology make it possible to deploy information technology in extreme environments (e.g., desert, arctic, high altitude, underwater) to support people who engage in complex and dangerous activities. This practitioner case integrates and operationalizes relevant NDM research including an NDM perspective, methods (cognitive task analysis, staged world exercise, and functional analysis), and frameworks (macrocognition, Laws that Govern Cognitive Work in Action, and Cognitive Performance Indicators) to inform design and identify the potential pitfalls associated with introducing information technology into extreme environments. A project conducted with the United States Air Force pararescue jumpers illustrates the complexity and relevance of NDM research in this challenging design space. Pararescue jumpers are military personnel who specialize in recovering personnel and administering life-saving medical treatment in a wide variety of operational environments.
C1 [Militello, Laura G.; Sushereba, Christen E.] Appl Decis Sci LLC, Dayton, OH USA.
[Branlat, Matthieu] 361 Interact LLC, Springboro, OH USA.
[Bean, Robert] US Air Force, Test & Evaluat Squadron 88, Nellis AFB, NV USA.
[Finomore, Victor] US Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Militello, LG (reprint author), 5335 Far Hills Ave,Suite 217, Dayton, OH 45429 USA.
EM l.militello@applieddecisionscience.com
OI Militello, Laura G/0000-0001-8445-5640
FU Air Force Research Laboratory [FA8650-08-D-6801]
FX We would like to thank all the PJs and CROs who participated in this
research. This project was sponsored by the Air Force Research
Laboratory under Contract No. FA8650-08-D-6801.
NR 51
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Z9 1
U1 1
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0963-1798
EI 2044-8325
J9 J OCCUP ORGAN PSYCH
JI J. Occup. Organ. Psychol.
PD JUN
PY 2015
VL 88
IS 2
SI SI
BP 251
EP 272
DI 10.1111/joop.12114
PG 22
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA CG4EI
UT WOS:000353235700003
ER
PT J
AU Quinton, BT
Leedy, KD
Lawson, JW
Tsao, B
Scofield, JD
Merrett, JN
Zhang, QH
Yost, K
Mukhopadhyay, SM
AF Quinton, Betty T.
Leedy, Kevin D.
Lawson, Jacob W.
Tsao, Bang
Scofield, James D.
Merrett, Joseph N.
Zhang, Qiuhong
Yost, Kevin
Mukhopadhyay, Sharmila M.
TI Influence of oxide buffer layers on the growth of carbon nanotube arrays
on carbon substrates
SO CARBON
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; THERMAL-CONDUCTIVITY; NANOPARTICLES;
CATALYSTS; SILICON; SURFACE; THICKNESS; DIAMETER; ALUMINA; FOAMS
AB Controllable growth of carbon nanotube (CNT) arrays on carbon substrates requires an oxide buffer layer material such as Al2O3 and SiO2. This research analyzes the influence of these buffer layers on a model carbon substrate composed of pyrolyzed carbon film on flat silicon. Electron microscopy was used to analyze nanocatalyst morphology, particle density, CNT nucleation rate, and CNT morphology for selected growth conditions. It was observed that nanotubes grown on Al2O3 buffer layers had the fastest CNT nucleation rates and more uniform tube diameters, with residual nanocatalyst particles having elongated shapes. In contrast, CNTs formed on SiO2 buffer layers nucleated slower and had more variation in tube diameters, while the nanocatalyst particles remained spherical. Comparisons among SiO2 buffer layers deposited using three different techniques-atomic layer deposition, microwave plasma enhanced chemical vapor deposition and thermal oxidation-indicated that surface roughness plays an important role. Silica layers with the highest roughness had the highest catalytic particle density and tallest carpet height for identical growth conditions. These results provide new insight into the importance of buffer layer chemistry and morphology on growth and controllability of CNT arrays. Published by Elsevier Ltd.
C1 [Quinton, Betty T.; Leedy, Kevin D.; Scofield, James D.; Merrett, Joseph N.; Yost, Kevin] AFRL, Wright Patterson AFB, OH 45433 USA.
[Quinton, Betty T.; Mukhopadhyay, Sharmila M.] Wright State Univ, Dayton, OH 45420 USA.
[Lawson, Jacob W.; Tsao, Bang; Zhang, Qiuhong] UDRI, Dayton, OH 45469 USA.
RP Quinton, BT (reprint author), AFRL, Wright Patterson AFB, OH 45433 USA.
EM betty.quinton@us.af.mil
NR 46
TC 1
Z9 1
U1 7
U2 41
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
EI 1873-3891
J9 CARBON
JI Carbon
PD JUN
PY 2015
VL 87
BP 175
EP 185
DI 10.1016/j.carbon.2015.02.015
PG 11
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CF1UH
UT WOS:000352332900016
ER
PT J
AU Beck, JA
Brown, JM
Kaszynski, AA
Slater, JC
Cross, CJ
AF Beck, Joseph A.
Brown, Jeffrey M.
Kaszynski, Alexander A.
Slater, Joseph C.
Cross, Charles J.
TI Mistuned Response Prediction of Dual Flow-Path Integrally Bladed Rotors
With Geometric Mistuning
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID DYNAMIC-ANALYSIS; DISKS; VIBRATION; MODELS
AB The geometric mistuning problem is investigated for dual flow-path integrally bladed rotors (DFIBRs) by outlining two methods that explicitly account for blade geometry surface deviations. The methods result in reduced-order models (ROMs) that are a reduced form of a parent Craig-Bampton component mode synthesis (CB-CMS) model. This is accomplished by performing a secondary modal analysis on different degrees of freedom (DOF) of the parent model. The DFIBR is formulated in cyclic symmetry coordinates with a tuned disk and ring and blades with small geometric deviations. The first method performs an eigen-analysis on the constraint DOF that provides a truncated set of interface modes, while the second method includes the disk and ring fixed interface normal mode in the eigen-analysis to yield a truncated set of ancillary modes. Utilization of tuned modes have the benefit of being solved in cyclic symmetry coordinates and only need to be calculated once, which offers significant computational savings for subsequent mistuning studies. Each geometric mistuning method relies upon the use of geometrically mistuned blade modes in the component mode framework to provide an accurate ROM. Forced response results are compared to both the full finite element model (FEM) solutions and a traditional frequency-based approach outlined in a previous effort. It is shown that the models provide highly accurate results with a significant reduction in solution time compared to the full FEM and parent ROM.
C1 [Beck, Joseph A.] Air Force Res Lab, Mfg & Ind Technol Div, Wright Patterson AFB, OH 45433 USA.
[Brown, Jeffrey M.; Kaszynski, Alexander A.; Cross, Charles J.] Air Force Res Lab, Aerosp Syst Directorate, Turbine Engine Div, Wright Patterson AFB, OH 45433 USA.
[Slater, Joseph C.] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
RP Beck, JA (reprint author), Air Force Res Lab, Mfg & Ind Technol Div, Wright Patterson AFB, OH 45433 USA.
EM Joseph.Beck.8@us.af.mil; Jeffrey.Brown.70@us.af.mil;
Alex.Kaszynski.ctr@us.af.mil; Joseph.Slater@wright.edu;
Charles.Cross.1@wpafb.af.mil
OI Slater, Joseph/0000-0002-1923-9279
NR 24
TC 0
Z9 1
U1 0
U2 6
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
EI 1528-8919
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD JUN
PY 2015
VL 137
IS 6
AR 062501
DI 10.1115/1.4028795
PG 9
WC Engineering, Mechanical
SC Engineering
GA CF9CM
UT WOS:000352859200009
ER
PT J
AU Lochtefeld, DF
Ciarallo, FW
AF Lochtefeld, Darrell F.
Ciarallo, Frank W.
TI Multi-objectivization Via Decomposition: An analysis of
helper-objectives and complete decomposition
SO EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
LA English
DT Article
DE Multi-objectivization; Multi-Objectivization via Segmentation (MOS);
Helper-objectives; Complete decomposition; Job shop scheduling problem
(JSSP)
ID GENETIC ALGORITHM; MULTIOBJECTIVIZATION; SEARCH
AB Multi-objectivization has been used to solve several single objective problems with improved results over traditional genetically inspired optimization methods. Multi-objectivization reformulates the single objective problem into a multiple objective problem. The reformulated problem is then solved with a multiple objective method to obtain a resulting solution to the original problem. Multi-objectivization Via Decomposition (MVD) and the addition of novel objectives are the two major approaches used in multi-objectivization. This paper focuses on analysis of two major MVD methods: helper-objectives and complete decomposition. Helper-objectives decomposition methods identify one or more decomposed objectives that are used simultaneously with the main objective to focus attention on components of the decomposed objectives. Complete decomposition, unlike helper-objectives does not explicitly use the main objective and instead uses decomposed objectives that exhaustively cover all portions of the main objective. This work examines the relationship between helper-objective decompositions and complete decomposition using both an analytic and experimental methodology. Pareto dominance relationships are examined analytically to clarify the relationship between dominant solutions in both types of decompositions. These results more clearly characterize how solutions from the two approaches rank in Pareto-frontier based fitness algorithms such as NSGA-II. An empirical study on job shop scheduling problems shows how fitness signal and fitness noise are affected by the balance of decomposition size. Additionally we provide evidence that, for the settings and instances studied, complete decompositions have a better on-average performance when compared to analogous helper-objective decompositions. Lastly we examine the underlying forces that determine effective decomposition size. We argue that it is advantageous to use less balanced decompositions as within-decomposition conflict increases and as heuristic strength increases. (C) 2014 Elsevier B.V. All rights reserved.
C1 [Lochtefeld, Darrell F.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Ciarallo, Frank W.] Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
RP Lochtefeld, DF (reprint author), Air Force Res Lab, 711th Human Performance Wing, Wright Patterson AFB, OH 45433 USA.
EM darrell.lochtefeld.1@us.af.mil; frank.ciarallo@wright.edu
NR 36
TC 2
Z9 2
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-2217
EI 1872-6860
J9 EUR J OPER RES
JI Eur. J. Oper. Res.
PD JUN 1
PY 2015
VL 243
IS 2
BP 395
EP 404
DI 10.1016/j.ejor.2014.11.041
PG 10
WC Management; Operations Research & Management Science
SC Business & Economics; Operations Research & Management Science
GA CD1KW
UT WOS:000350834800006
ER
PT J
AU Vongsy, K
Eismann, MT
Mendenhall, MJ
AF Vongsy, Karmon
Eismann, Michael T.
Mendenhall, Michael J.
TI Extension of the Linear Chromodynamics Model for Spectral Change
Detection in the Presence of Residual Spatial Misregistration
SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
LA English
DT Article
DE Change detection; generalized likelihood ratio test (GLRT);
hyperspectral; misregistration
ID UNSUPERVISED CHANGE DETECTION; HYPERSPECTRAL CHANGE DETECTION;
MULTISPECTRAL IMAGERY; MULTITEMPORAL IMAGES; MATCHED-FILTER;
SIMPLEX-METHOD; TRANSFORM; SEARCH; IMPACT
AB A generalized likelihood ratio test (GLRT) statistic for spectral change detection based on the linear chromodynamics model is extended to accommodate unknown residual misregistration between imagery described by a prior probability density function for the spatial misregistration. Using a normal prior distribution leads to a fourth-order polynomial that can be numerically minimized over the unknown misregistration parameters. A more computationally efficient closed-form solution is developed based on a quadratic approximation and provides comparable results to the numerical minimization for the investigated test cases while running 30 times faster. The results applying the method to hyperspectral imagery indicate up to an order of magnitude reduction in false alarms at the same detection rate relative to baseline change detection methods for synthetically misregistered test data particularly in image regions containing edges and fine spatial features. Sensitivity to model parameters is assessed, and the method is compared with a previously published misregistration compensation approach yielding comparable results. Although the GLRT approach appears to exhibit comparable change detection performance, it offers the possibility of tailoring the algorithm to a priori knowledge of expected misregistration errors or to compensate structured misregistration as would occur due to parallax errors due to perspective variations (e.g., image parallax).
C1 [Vongsy, Karmon; Eismann, Michael T.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Mendenhall, Michael J.] US Air Force, Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH 45433 USA.
RP Vongsy, K (reprint author), US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM karmon.vongsy@us.af.mil; michael.eismann@us.af.mil; mendenmi@gmail.com
FU Sensors Directorate of the Air Force Research Laboratory,
Wright-Patterson Air Force Base, Ohio
FX This work was supported by the Sensors Directorate of the Air Force
Research Laboratory, Wright-Patterson Air Force Base, Ohio.
NR 62
TC 1
Z9 2
U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0196-2892
EI 1558-0644
J9 IEEE T GEOSCI REMOTE
JI IEEE Trans. Geosci. Remote Sensing
PD JUN
PY 2015
VL 53
IS 6
BP 3005
EP 3021
DI 10.1109/TGRS.2014.2367471
PG 17
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
& Photographic Technology
GA CD4OV
UT WOS:000351063800003
ER
PT J
AU Jang, WY
Ku, Z
Urbas, A
Derov, J
Noyola, MJ
AF Jang, Woo-Yong
Ku, Zahyun
Urbas, Augustine
Derov, John
Noyola, Michael J.
TI Plasmonic Superpixel Sensor for Compressive Spectral Sensing
SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
LA English
DT Article
DE Compressive spectral sensing (CSS); spectral reconstruction;
superpixels; surface plasmon
ID MAMMALIAN RETINA; DETECTORS; AIRBORNE; PARALLEL
AB In multispectral and hyperspectral sensing, there is a growing need for a versatile sensor capable of adapting response and improving detection of hard-to-find dynamic targets of interest in contested environments. Such on-the-fly adaptivity in current systems requires significant data resources and computation time for data analysis. In order to implement practical systems with this capability, sensors that reduce data loads and computational requirements while maintaining performance are required. To this end, we report a novel hybrid algorithm sensor method using plasmon-based tunable superpixels and a compressive spectral sensing (CSS) algorithm for the next generation of hyperspectral sensors. The benefit of our hybrid approach is that it enables us to effectively sense a minimal data set and only performs simple arithmetic such as linear superposition to extract spectral features of a target without requiring actual spectral filters. In this paper, we focus on the selection of a minimum basis of plasmonic spectral bands, the configuration of superpixels using selected plasmonic structures, and finally the generalization of a CSS algorithm to process superpixel data for feature extractions. The performance of algorithm-driven superpixels has been successfully demonstrated with the context of reconstructing infrared spectral signatures.
C1 [Jang, Woo-Yong] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Ku, Zahyun; Urbas, Augustine] US Air Force, Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA.
[Derov, John; Noyola, Michael J.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Jang, WY (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM jangusc@gmail.com; zahyun.ku.ctr.kr@us.af.mil;
augustine.urbas@us.af.mil; john.derov@us.af.mil;
michael.noyola@wpafb.af.mil
FU National Research Council Associateship Award [FA9550-12-D-0001]
FX This work was supported by the National Research Council Associateship
Award under Contract FA9550-12-D-0001.
NR 18
TC 4
Z9 4
U1 4
U2 38
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0196-2892
EI 1558-0644
J9 IEEE T GEOSCI REMOTE
JI IEEE Trans. Geosci. Remote Sensing
PD JUN
PY 2015
VL 53
IS 6
BP 3471
EP 3480
DI 10.1109/TGRS.2014.2377634
PG 10
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
& Photographic Technology
GA CD4OV
UT WOS:000351063800036
ER
PT J
AU Wu, J
Shi, J
Baca, J
Emergo, R
Elliot, A
Wilt, J
Sebastian, MA
Haugan, T
Varanasi, CV
AF Wu, Judy
Shi, Jack
Baca, Javier
Emergo, Rose
Elliot, Alan
Wilt, Jamie
Sebastian, Mary Ann
Haugan, Timothy
Varanasi, Chakrapani V.
TI Probing Microscopic Strain Interplay Due to Impurity Doping and Vicinal
Growth and Its Effect on Pinning Landscape in YBCO Films
SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
LA English
DT Article
DE Doping; flux pinning; microstructure; strain; superconducting thin films
ID EPITAXIAL YBA2CU3O7-DELTA FILMS; COLUMNAR DEFECTS; VORTEX MOTION;
SUPERCONDUCTOR; DISPERSIONS; NANORODS; SPLAY
AB Vortex pinning by insertion of non-superconducting defects like BZO or BSO nanorods into the YBCO matrix is an effective means to enhance pinning since they self-assemble into columnar structures that provide strong pinning along the length of the flux-line. However, only limited control of their geometry is possible by current growth methods. To meet the requirements of applications that operate in magnetic fields of varying intensity or orientation, this work studies strain-mediated self-assembly of 3D pinning landscape through theoretical modeling as well as experimental exploration to achieve controllable growth BZO or BSO nanostructures in YBCO matrix films. The microstructure of BZO- and BSO-doped YBCO thin films was studied using transmission electron microscopy and the findings indicate that it is possible to produce a controllable defect landscape and improved critical current density with respect to different orientation of the magnetic field by manipulation of the strain relationships using vicinal substrates.
C1 [Wu, Judy; Shi, Jack; Baca, Javier; Emergo, Rose; Elliot, Alan; Wilt, Jamie] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
[Sebastian, Mary Ann; Haugan, Timothy] US Air Force Res Lab, Prop Directorate, Dayton, OH 45433 USA.
[Varanasi, Chakrapani V.] Army Res Off, Adelphi, MD 20783 USA.
RP Wu, J (reprint author), Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
EM jwu@ku.edu
FU ARO [W911NF-12-1-0412]; NSF [NSF-DMR-1105986, EPSCoR-0903806]; State of
Kansas through Kansas Technology Enterprise Corporation
FX This work was supported in part by the ARO Grant W911NF-12-1-0412, by
the NSF under Contracts NSF-DMR-1105986 and NSF EPSCoR-0903806, and
matching support from the State of Kansas through Kansas Technology
Enterprise Corporation.
NR 19
TC 1
Z9 1
U1 2
U2 40
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1051-8223
EI 1558-2515
J9 IEEE T APPL SUPERCON
JI IEEE Trans. Appl. Supercond.
PD JUN
PY 2015
VL 25
IS 3
AR 8000205
DI 10.1109/TASC.2014.2369735
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA CA7RZ
UT WOS:000349116100018
ER
PT J
AU Shuman, NS
Hunton, DE
Viggiano, AA
AF Shuman, Nicholas S.
Hunton, Donald E.
Viggiano, Albert A.
TI Ambient and Modified Atmospheric Ion Chemistry: From Top to Bottom
SO CHEMICAL REVIEWS
LA English
DT Review
ID SULFURIC-ACID VAPOR; DISSOCIATIVE RECOMBINATION COEFFICIENTS;
MASS-SPECTROMETRIC MEASUREMENTS; MUTUAL NEUTRALIZATION RATES;
PRE-CONDENSATION NUCLEI; TEMPERATURE 300-1800 K; GALACTIC COSMIC-RAYS;
FLOW-DRIFT TECHNIQUE; AIRCRAFT IN-FLIGHT; WATER CLUSTER IONS
C1 [Shuman, Nicholas S.; Hunton, Donald E.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
RP Viggiano, AA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
FU Air Force Office of Scientific Research through AFOSR LRIR [13RV02COR]
FX We are grateful for the support of the Air Force Office of Scientific
Research for this work through AFOSR LRIR no. 13RV02COR. We have
benefitted by mentoring from the pioneers in the field and dedicate this
Review to them. On the laboratory side, A.A.V. was trained by the
original flowing afterglow group led by Eldon Ferguson and Fred
Fehsenfeld and was fortunate to work in the Frank Arnold group during
the early days of balloon borne mass spectrometry. Rocco Narcisi served
as D.E.H.'s mentor in his early AF career.
NR 279
TC 12
Z9 12
U1 6
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0009-2665
EI 1520-6890
J9 CHEM REV
JI Chem. Rev.
PD MAY 27
PY 2015
VL 115
IS 10
BP 4542
EP 4570
DI 10.1021/cr5003479
PG 29
WC Chemistry, Multidisciplinary
SC Chemistry
GA CJ3KZ
UT WOS:000355383900024
PM 25659834
ER
PT J
AU Meng, DC
Zhai, XF
Ma, C
Huang, HL
Yun, Y
Huang, Y
Fu, ZP
Peng, RR
Mao, XY
Chen, XB
Brown, G
Lu, YL
AF Meng, Dechao
Zhai, Xiaofang
Ma, Chao
Huang, Haoliang
Yun, Yu
Huang, Yan
Fu, Zhengping
Peng, Ranran
Mao, Xiangyu
Chen, Xiaobing
Brown, Gail
Lu, Yalin
TI Self-modulated nanostructures in super-large-period
Bi-11(Fe5CoTi3)(10/9)O-33 epitaxial thin films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ROOM-TEMPERATURE; ELECTRICAL-PROPERTIES; BI4TI3O12-BIFEO3; SYSTEM
AB Super-large-period Aurivillius thin films with a pseudo-period of ten were grown on (001) SrTiO3 substrates using the pulsed laser deposition method. The as-grown films are found to be coherently strained to the substrate and atomically smooth. X-ray diffraction indicates an average periodicity of ten, while analysis with the high resolution scanning transmission electron microscopy reveals a self-modulated nanostructure in which the periodicity changes as the film thickness increases. Finally, we discuss the magnetic and possible ferroelectric properties of the self-modulated large period Aurivillius films at the room temperature. (C) 2015 AIP Publishing LLC.
C1 [Meng, Dechao; Zhai, Xiaofang; Ma, Chao; Huang, Haoliang; Yun, Yu; Huang, Yan; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
[Meng, Dechao; Huang, Haoliang; Yun, Yu; Huang, Yan; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
[Zhai, Xiaofang; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China.
[Zhai, Xiaofang] CAS Hefei Inst Phys Sci, Hefei Phys Sci & Technol Ctr, Hefei 230031, Anhui, Peoples R China.
[Mao, Xiangyu; Chen, Xiaobing] Yangzhou Univ, Coll Phys Sci & Technol, Yangzhou 225002, Jiangsu, Peoples R China.
[Brown, Gail] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA.
RP Meng, DC (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
EM xfzhai@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010; Ma, Chao/J-4569-2015
FU National Basic Research Program of China [2012CB922001]; Key Research
Program of Chinese Academy of Sciences [KGZD-EW-T06]; Fundamental
Research Funds for the Central Universities; U.S. Air Force Office of
Scientific Research (OSR); DTRA
FX This work was supported by the National Basic Research Program of China
(2012CB922001), the Key Research Program of Chinese Academy of Sciences
(KGZD-EW-T06) and Fundamental Research Funds for the Central
Universities. The authors are grateful to Weigang Chen and Hao Sun from
Bruker Customer Support Centers; Jinlan Peng, Haibin Zhang, Libo Wu et
al., from the USTC Center for Micro-and Nanoscale Research and
Fabrication for the help on ferroelectricity measurements. Y. L. Lu also
appreciates support from the U.S. Air Force Office of Scientific
Research (OSR) and DTRA.
NR 32
TC 5
Z9 5
U1 7
U2 46
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 25
PY 2015
VL 106
IS 21
AR 212906
DI 10.1063/1.4921966
PG 5
WC Physics, Applied
SC Physics
GA CJ6UX
UT WOS:000355631400033
ER
PT J
AU Reshetnyak, VY
Pinkevych, IP
Zadorozhnii, VI
Evans, DR
AF Reshetnyak, Victor Yu.
Pinkevych, Igor P.
Zadorozhnii, Victor I.
Evans, Dean R.
TI Liquid Crystal Control of Surface Plasmon Resonance Sensor Based on
Nanorods
SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS
LA English
DT Article; Proceedings Paper
CT 25th International Liquid Crystal Conference
CY JUN 29-JUL 04, 2014
CL Dublin, IRELAND
SP Failte Ireland - Nat Tourism Dev Authority
DE liquid crystal; columnar thin film; sensing; surface plasmons
ID PERIODIC METALLIC NANOWIRES; SENSITIVITY-ENHANCEMENT; NANOPARTICLES;
EXCITATION; FILMS
AB We analyze a theoretical model of the five layer nanorod-mediated surface plasmon resonance (SPR) sensor comprising a nematic LC layer. The light propagation through the layered system is studied solving the Fresnel equations under SPR conditions. We calculate the light reflectance angular spectrum and show that control of the orientational state of the LC layer enables us to manipulate position of the reflectance curve minimums, their depth and sensitivity. It allows one to choose an interval of the light incidence angles convenient for work without need in angular tuning of sensor at replacing of the analyte.
C1 [Reshetnyak, Victor Yu.; Pinkevych, Igor P.; Zadorozhnii, Victor I.] Taras Shevchenko Natl Univ Kyiv, Fac Phys, UA-01601 Kiev, Ukraine.
[Evans, Dean R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Zadorozhnii, VI (reprint author), Taras Shevchenko Natl Univ Kyiv, Fac Phys, 64-13 Volodymyrska Str, UA-01601 Kiev, Ukraine.
EM viza@univ.kiev.ua
RI Reshetnyak, Victor/B-6722-2008
OI Reshetnyak, Victor/0000-0003-0515-9814
FU EOARD [118007]
FX The work was partially supported by the EOARD Grant 118007.
NR 33
TC 0
Z9 0
U1 3
U2 10
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 1542-1406
EI 1563-5287
J9 MOL CRYST LIQ CRYST
JI Mol. Cryst. Liquid Cryst.
PD MAY 24
PY 2015
VL 613
IS 1
SI SI
BP 110
EP 120
DI 10.1080/15421406.2015.1032080
PG 11
WC Crystallography
SC Crystallography
GA CM1BG
UT WOS:000357414000015
ER
PT J
AU Roadcap, JR
van den Bosch, J
Pereira, W
AF Roadcap, John R.
van den Bosch, Jeannette
Pereira, Wellesley
TI Analysis of Air Force Weather Agency cloud data for assessing single and
multiple scattering through clouds at optical wavelengths
SO JOURNAL OF APPLIED REMOTE SENSING
LA English
DT Article
DE nephanalysis; cloud scattering; cloud optical depth; cloud microphysics
ID DISCRETE-ORDINATE METHOD; RADIATIVE-TRANSFER; ATMOSPHERES; WATER
AB The Air Force Weather Agency (AFWA) has a long history of providing global cloud analyses and forecasts. Until recently, their focus has been on determining the cloud amount and cloud type. Satellite-based World-Wide Merged Cloud Analysis (WWMCA) data provided by the AFWA are analyzed to understand and assess their capability to characterize cloud single scattering parameters at optical wavelengths. WWMCA represents the most refined version of AFWA's cloud depiction and forecast system and includes up to four cloud layers and 38 cloud parameters per file at each hemispheric grid point. Findings on WWMCA's determination of cloud optical depth (COD), consistency with synoptic-scale cloud fields, and its ability to support radiative transfer calculations are as follows: (1) the WWMCA optical depth is strongly correlated with the theoretical optical depth at 550 nm computed using WWMCA's cloud microphysical parameters. (2) WWMCA captures the large-scale spatial variation of COD as represented by the Mei-yu/Baiu onset and progression of synoptic cloud fields as well as the time-dependent character of mesoscale features. (3) WWMCA does not provide single scattering albedo and the cloud phase function which are needed to solve the radiative transfer equation. Because WWMCA is based on passive sensor processing, obscured cloud layers are not accounted for in the calculation of COD, which may lead to an underestimation of total COD. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Roadcap, John R.; van den Bosch, Jeannette; Pereira, Wellesley] Air Force Res Lab, Battlespace Surveillance Innovat Branch, Kirtland AFB, NM 87117 USA.
RP Roadcap, JR (reprint author), Air Force Res Lab, Battlespace Surveillance Innovat Branch, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM afrl.rvby@us.af.mil
NR 18
TC 0
Z9 0
U1 2
U2 2
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1931-3195
J9 J APPL REMOTE SENS
JI J. Appl. Remote Sens.
PD MAY 21
PY 2015
VL 9
AR 096049
DI 10.1117/1.JRS.9.096049
PG 16
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
Photographic Technology
GA CK5SL
UT WOS:000356285900002
ER
PT J
AU Jensen, KL
Shiffler, DA
Rittersdorf, IM
Lebowitz, JL
Harris, JR
Lau, YY
Petillo, JJ
Tang, W
Luginsland, JW
AF Jensen, Kevin L.
Shiffler, Donald A.
Rittersdorf, Ian M.
Lebowitz, Joel L.
Harris, John R.
Lau, Y. Y.
Petillo, John J.
Tang, Wilkin
Luginsland, John W.
TI Discrete space charge affected field emission: Flat and hemisphere
emitters
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID HIGH-CURRENT DENSITY; CHILD-LANGMUIR LAW; ELECTRON-EMISSION; CATHODES;
SIMULATION; AMPLIFIERS; DESIGN; ARRAYS; BEAMS; CONES
AB Models of space-charge affected thermal-field emission from protrusions, able to incorporate the effects of both surface roughness and elongated field emitter structures in beam optics codes, are desirable but difficult. The models proposed here treat the meso-scale diode region separate from the micro-scale regions characteristic of the emission sites. The consequences of discrete emission events are given for both one-dimensional (sheets of charge) and three dimensional (rings of charge) models: in the former, results converge to steady state conditions found by theory (e.g., Rokhlenko et al. [J. Appl. Phys. 107, 014904 (2010)]) but show oscillatory structure as they do. Surface roughness or geometric features are handled using a ring of charge model, from which the image charges are found and used to modify the apex field and emitted current. The roughness model is shown to have additional constraints related to the discrete nature of electron charge. The ability of a unit cell model to treat field emitter structures and incorporate surface roughness effects inside a beam optics code is assessed. (C) 2015 AIP Publishing LLC.
C1 [Jensen, Kevin L.; Rittersdorf, Ian M.] Naval Res Lab, Washington, DC 20375 USA.
[Shiffler, Donald A.; Tang, Wilkin] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Lebowitz, Joel L.] Rutgers State Univ, Dept Math, Piscataway, NJ 08854 USA.
[Lebowitz, Joel L.] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA.
[Harris, John R.] US Navy Reserve, New Orleans, LA 70143 USA.
[Lau, Y. Y.] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
[Petillo, John J.] Leidos, Billerica, MA 01821 USA.
[Luginsland, John W.] AFOSR, Phys & Elect Directorate, Arlington, VA 22203 USA.
RP Jensen, KL (reprint author), Naval Res Lab, Code 6854, Washington, DC 20375 USA.
EM kevin.jensen@nrl.navy.mil
RI Jensen, Kevin/I-1269-2015
OI Jensen, Kevin/0000-0001-8644-1680
FU AFOSR; National Research Council Research Associateship Award at the
Naval Research Laboratory
FX We gratefully acknowledge financial support from J. Luginsland and J.
Marshall (AFOSR). This research was performed while IMR held a National
Research Council Research Associateship Award at the Naval Research
Laboratory.
NR 53
TC 9
Z9 9
U1 2
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 21
PY 2015
VL 117
IS 19
AR 194902
DI 10.1063/1.4921186
PG 17
WC Physics, Applied
SC Physics
GA CI8FN
UT WOS:000355005600027
ER
PT J
AU Harris, JR
Jensen, KL
Shiffler, DA
Petillo, JJ
AF Harris, J. R.
Jensen, K. L.
Shiffler, D. A.
Petillo, J. J.
TI Shielding in ungated field emitter arrays
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID EMISSION CATHODES
AB Cathodes consisting of arrays of high aspect ratio field emitters are of great interest as sources of electron beams for vacuum electronic devices. The desire for high currents and current densities drives the cathode designer towards a denser array, but for ungated emitters, denser arrays also lead to increased shielding, in which the field enhancement factor beta of each emitter is reduced due to the presence of the other emitters in the array. To facilitate the study of these arrays, we have developed a method for modeling high aspect ratio emitters using tapered dipole line charges. This method can be used to investigate proximity effects from similar emitters an arbitrary distance away and is much less computationally demanding than competing simulation approaches. Here, we introduce this method and use it to study shielding as a function of array geometry. Emitters with aspect ratios of 10(2)-10(4) are modeled, and the shielding-induced reduction in beta is considered as a function of tip-to-tip spacing for emitter pairs and for large arrays with triangular and square unit cells. Shielding is found to be negligible when the emitter spacing is greater than the emitter height for the two-emitter array, or about 2.5 times the emitter height in the large arrays, in agreement with previously published results. Because the onset of shielding occurs at virtually the same emitter spacing in the square and triangular arrays, the triangular array is preferred for its higher emitter density at a given emitter spacing. The primary contribution to shielding in large arrays is found to come from emitters within a distance of three times the unit cell spacing for both square and triangular arrays. (C) 2015 AIP Publishing LLC.
C1 [Harris, J. R.] US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
[Jensen, K. L.] Naval Res Lab, Washington, DC 20375 USA.
[Shiffler, D. A.] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
[Petillo, J. J.] Leidos, Billerica, MA 01821 USA.
RP Harris, JR (reprint author), US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
RI Jensen, Kevin/I-1269-2015
OI Jensen, Kevin/0000-0001-8644-1680
FU Air Force Office of Scientific Research
FX The authors would like to thank Y. Y. Lau and J. L. Lebowitz for
valuable discussions. K.L.J. gratefully acknowledges partial support
from the Air Force Office of Scientific Research. J.R.H. would like to
thank the Office of Naval Research Reserve Component Program for
supporting his participation in this work.
NR 20
TC 12
Z9 12
U1 0
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 18
PY 2015
VL 106
IS 20
AR 201603
DI 10.1063/1.4921709
PG 4
WC Physics, Applied
SC Physics
GA CI8GR
UT WOS:000355009400006
ER
PT J
AU Pulford, B
Ehrenreich, T
Holten, R
Kong, FT
Hawkins, TW
Dong, L
Dajani, I
AF Pulford, Benjamin
Ehrenreich, Thomas
Holten, Roger
Kong, Fanting
Hawkins, Thomas W.
Dong, Liang
Dajani, Iyad
TI 400-W near diffraction-limited single-frequency all-solid photonic
bandgap fiber amplifier
SO OPTICS LETTERS
LA English
DT Article
ID LARGE-MODE-AREA; CRYSTAL FIBER; POWER; INSTABILITIES; NM
AB An ytterbium-doped large-mode area photonic bandgap fiber is used to demonstrate 400 W of single-frequency output at 1064 nm with excellent beam quality and minimal stimulated Brillouin scattering. The fiber possesses all-solid microstructures embedded in the cladding and a core composed of phosphosilicate with a diameter of similar to 50 mu m. As the signal power is pushed beyond 450 W, there is degradation in the beam quality due to the modal instability. We briefly discuss techniques to alleviate this problem in future designs. To the best of our knowledge, the 400-W single-frequency near diffraction-limited output far exceeds the current state-of-the-art from such type of fiber amplifier. (C) 2015 Optical Society of America
C1 [Pulford, Benjamin; Ehrenreich, Thomas; Holten, Roger; Dajani, Iyad] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Kong, Fanting; Hawkins, Thomas W.; Dong, Liang] Clemson Univ, ECE COMSET, Anderson, SC 29625 USA.
RP Dajani, I (reprint author), US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
EM lyad.Dajani@kirtland.af.mil
FU High Energy Laser Joint Technology Office (HEL-JTO); Air Force Office of
Scientific Research (AFOSR)
FX This work was partially funded by the High Energy Laser Joint Technology
Office (HEL-JTO) and the Air Force Office of Scientific Research
(AFOSR).
NR 18
TC 5
Z9 6
U1 2
U2 11
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD MAY 15
PY 2015
VL 40
IS 10
BP 2297
EP 2300
DI 10.1364/OL.40.002297
PG 4
WC Optics
SC Optics
GA CI4HD
UT WOS:000354708300036
PM 26393723
ER
PT J
AU Lombardi, JP
Aga, RS
Heckman, EM
Bartsch, CM
AF Lombardi, J. P., III
Aga, R. S., Jr.
Heckman, E. M.
Bartsch, C. M.
TI Characterisation of DNA biopolymer-based UV photodetector fabricated by
inkjet printing
SO ELECTRONICS LETTERS
LA English
DT Article
ID ENERGY; PAPER
AB The performance of a printable, ultraviolet (UV) photoconducting biopolymer is investigated for UV photodetectors of varying layer thicknesses. The biopolymer is formed from deoxyribonucleic acid (DNA) with the addition of the Clevios P formulation of poly(3,4-ethylenedioxythiophene)-poly(styrenesulphonate) (PEDOT: PSS) and hexadecyltrimethyl-ammonium chloride (CTMA); it is then combined with phenyl-C61-butyric acid methyl (PCBM) to make a printable, UV photoconducting material. The highest measured responsivity of the photodetectors is 1.2 mA/W at 20 V bias using a 260 nm source.
C1 [Lombardi, J. P., III; Aga, R. S., Jr.; Heckman, E. M.; Bartsch, C. M.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45431 USA.
RP Bartsch, CM (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45431 USA.
EM carrie.bartsch.1@us.af.mil
NR 16
TC 1
Z9 1
U1 2
U2 9
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
EI 1350-911X
J9 ELECTRON LETT
JI Electron. Lett.
PD MAY 14
PY 2015
VL 51
IS 10
BP 778
EP 779
DI 10.1049/el.2015.0577
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA CH5RQ
UT WOS:000354093400026
ER
PT J
AU Velten, A
Schmitt-Sody, A
Diels, JC
Rostami, S
Rasoulof, A
Feng, C
Arissian, L
AF Velten, Andreas
Schmitt-Sody, Andreas
Diels, Jean-Claude
Rostami, Shermineh
Rasoulof, Amin
Feng, Chengyong
Arissian, Ladan
TI Videos of light filamentation in air
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article; Proceedings Paper
CT 5th International Symposium on Filamentation (COFIL)
CY SEP, 2014
CL Shanghai, PEOPLES R CHINA
DE ultrashort pulses; atmospheric propagation; plasmas
ID FEMTOSECOND LASER-PULSE; PLASMA FILAMENTS; PROPAGATION; DISCHARGES;
MEDIA; BEAMS
AB Light filaments are of interest for applications in remote sensing, communications, and the control of electronic discharges. Different plasma dynamics and emitted radiation have been observed according to the initial pulse characteristics and beam collimation. To help observing and understanding these observations, a new technique of creating a movie of the moving light pulse and the plasma emission in its wake is presented. Over 1,000 synchronized frames of a streak camera are combined to produce the 4D (2 D space, time in ps and wavelength) movie.
C1 [Velten, Andreas] Univ Wisconsin, Lab Optic & Computat Instrumentat, Madison, WI 53706 USA.
[Velten, Andreas] Morgridge Inst Res, Madison, WI USA.
[Schmitt-Sody, Andreas] Kirtland Airforce Base, Air Force Res Lab, Albuquerque, NM USA.
[Diels, Jean-Claude; Rostami, Shermineh; Rasoulof, Amin; Feng, Chengyong; Arissian, Ladan] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87131 USA.
RP Velten, A (reprint author), Univ Wisconsin, Lab Optic & Computat Instrumentat, Madison, WI 53706 USA.
EM jcdiels@unm.edu
FU DTRA [HDTRA-11-1-0043]; ARO MURI [W911NF1110297]
FX This work was supported by DTRA grant HDTRA-11-1-0043 and the ARO MURI
grant W911NF1110297.
NR 47
TC 1
Z9 1
U1 1
U2 15
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
EI 1361-6455
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD MAY 14
PY 2015
VL 48
IS 9
SI SI
AR 094020
DI 10.1088/0953-4075/48/9/094020
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA CF7MW
UT WOS:000352741600021
ER
PT J
AU Turgut, Z
Kosai, H
Bixel, T
Scofield, J
Semiatin, SL
Horwath, J
AF Turgut, Zafer
Kosai, Hiroyuki
Bixel, Tyler
Scofield, James
Semiatin, S. Lee
Horwath, John
TI Hysteresis loss analysis of soft magnetic materials under direct current
bias conditions
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
AB Direct current bias related hysteresis loss characteristics of three commercially available magnetic materials: (1) an iron based Metglas tape core, (2) a Sendust powder core, and (3) a Mn-Zn based ferrite in both un-gapped and gapped configurations were studied. The measurements are conducted for a fixed external field H-ext, a fixed flux swing (Delta B), and a fixed maximum forward magnetization (B-max) as a function of the external bias field. In all the measurements, a direct correlation is found between permeability and measured loss values as a function of dc bias field. Increased hysteresis losses are measured in the magnetization rotation region in which classical domain theory predicts minimal losses. The observed trends are discussed within the frame work of classical domain theory. (C) 2015 AIP Publishing LLC.
C1 [Turgut, Zafer; Kosai, Hiroyuki; Bixel, Tyler; Scofield, James; Semiatin, S. Lee; Horwath, John] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kosai, Hiroyuki; Bixel, Tyler] Universal Energy Syst Inc, Dayton, OH 45432 USA.
RP Turgut, Z (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM zafer.turgut.2@us.af.mil
RI SEMIATIN, SHELDON/E-7264-2017
NR 10
TC 3
Z9 3
U1 2
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 7
PY 2015
VL 117
IS 17
AR 17A508
DI 10.1063/1.4919228
PG 4
WC Physics, Applied
SC Physics
GA CI7YW
UT WOS:000354984100047
ER
PT J
AU Thomas, BJ
Harruff-Miller, BA
Bunker, CE
Lewis, WK
AF Thomas, Brandon J.
Harruff-Miller, Barbara A.
Bunker, Christopher E.
Lewis, William K.
TI Infrared spectroscopy of Mg-CO2 and Al-CO2 complexes in helium
nanodroplets
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TRANSITION-METAL CLUSTERS; CARBON-DIOXIDE; LASER SPECTROSCOPY;
AB-INITIO; PHOTODISSOCIATION SPECTROSCOPY; GAS-PHASE; DROPLETS; CO2;
HCN; LIQUID
AB The catalytic reduction of CO2 to produce hydrocarbon fuels is a topic that has gained significant attention. Development of efficient catalysts is a key enabler to such approaches, and metal-based catalysts have shown promise towards this goal. The development of a fundamental understanding of the interactions between CO2 molecules and metal atoms is expected to offer insight into the chemistry that occurs at the active site of such catalysts. In the current study, we utilize helium droplet methods to assemble complexes composed of a CO2 molecule and a Mg or Al atom. High-resolution infrared (IR) spectroscopy and optically selected mass spectrometry are used to probe the structure and binding of the complexes, and the experimental observations are compared with theoretical results determined from ab initio calculations. In both the Mg-CO2 and Al-CO2 systems, two IR bands are obtained: one assigned to a linear isomer and the other assigned to a T-shaped isomer. In the case of the Mg-CO2 complexes, the vibrational frequencies and rotational constants associated with the two isomers are in good agreement with theoretical values. In the case of the Al-CO2 complexes, the vibrational frequencies agree with theoretical predictions; however, the bands from both structural isomers exhibit significant homogeneous broadening sufficient to completely obscure the rotational structure of the bands. The broadening is consistent with an upper state lifetime of 2.7 ps for the linear isomer and 1.8 ps for the T-shaped isomer. The short lifetime is tentatively attributed to a prompt photo-induced chemical reaction between the CO2 molecule and the Al atom comprising the complex. (C) 2015 AIP Publishing LLC.
C1 [Thomas, Brandon J.] Spectral Energies LLC, Dayton, OH 45431 USA.
[Harruff-Miller, Barbara A.] Univ Dayton, Res Inst, Energy Technol & Mat Div, Dayton, OH 45469 USA.
[Bunker, Christopher E.; Lewis, William K.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Lewis, WK (reprint author), Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM william.lewis.49@us.af.mil
FU Air Force Office of Scientific Research (AFOSR); Air Force Research
Laboratory (AFRL)
FX We gratefully acknowledge funding from the Air Force Office of
Scientific Research (AFOSR) through the support of Dr. Michael Berman
and the Air Force Research Laboratory (AFRL).
NR 70
TC 2
Z9 2
U1 3
U2 26
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAY 7
PY 2015
VL 142
IS 17
AR 174310
DI 10.1063/1.4919693
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CH8AN
UT WOS:000354258200026
PM 25956103
ER
PT J
AU Ryan, MC
AF Ryan, Michael C.
TI A Second Chance to Miss the Same Opportunity: Post-Putin and the
Potential Re-Emergence of a More Reasonable Russia
SO AMERICAN FOREIGN POLICY INTERESTS
LA English
DT Article
DE cold war; NATO; prosperity; Putin; Russia; security; Ukraine
AB At some point, possibly sooner and more suddenly than expected, Vladimir Putin will go the way of his autocratic predecessors and, along with him, Putinism. Russia will once again find itself at a crossroads. At that moment, as they have so many times before, the longings inherent in every Russian to be both a great Slav and a modern European will visit internal turmoil on the troubled souls of a proud nation. This recurring Russian spring offers the world yet another opportunity to embrace the Russian people. The presence of Putin is a clear indication that our generation missed our previous opportunity. His inevitable departure will be our second chance to miss the same opportunity unless we start to try to see the world as Russians do and then begin to communicate with them in ways that translate well into their perception of the world around them.
C1 [Ryan, Michael C.] Dept Def, Washington, DC 20301 USA.
[Ryan, Michael C.] US Air Force, Nellis AFB, NV USA.
[Ryan, Michael C.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Ryan, Michael C.] Coll Interarmee Def, Paris, France.
[Ryan, Michael C.] US Mission European Union, Brussels, Belgium.
[Ryan, Michael C.] NATO Sch, Oberammergau, Germany.
RP Ryan, MC (reprint author), Dept Def, Washington, DC 20301 USA.
NR 7
TC 0
Z9 0
U1 2
U2 2
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 1080-3920
EI 1533-2128
J9 AM FOREIGN POLICY IN
JI Am. Foreign Policy Interes.
PD MAY 4
PY 2015
VL 37
IS 3
BP 148
EP 156
DI 10.1080/10803920.2015.1056684
PG 9
WC International Relations
SC International Relations
GA CP3TC
UT WOS:000359803900004
ER
PT J
AU Akdim, B
Pachter, R
Naik, RR
AF Akdim, Brahim
Pachter, Ruth
Naik, Rajesh R.
TI Self-assembled peptide nanotubes as electronic materials: An evaluation
from first-principles calculations
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BUILDING-BLOCKS; NANOSTRUCTURES; MOLECULES
AB In this letter, we report on the evaluation of diphenylalanine (FF), dityrosine (YY), and phenylalaninetryptophan (FW) self-assembled peptide nanotube structures for electronics and photonics applications. Realistic bulk peptide nanotube material models were used in density functional theory calculations to mimic the well-ordered tubular nanostructures. Importantly, validated functionals were applied, specifically by using a London dispersion correction to model intertube interactions and a range-separated hybrid functional for accurate bandgap calculations. Bandgaps were found consistent with available experimental data for FF, and also corroborate the higher conductance reported for FW in comparison to FF peptide nanotubes. Interestingly, the predicted bandgap for the YY tubular nanostructure was found to be slightly higher than that of FW, suggesting higher conductance as well. In addition, the band structure calculations along the high symmetry line of nanotube axis revealed a direct bandgap for FF. The results enhance our understanding of the electronic properties of these material systems and will pave the way into their application in devices. (c) 2015 AIP Publishing LLC.
C1 [Akdim, Brahim; Pachter, Ruth; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Akdim, Brahim] Gen Dynam Informat Technol Inc, Dayton, OH USA.
RP Akdim, B (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM brahim.akdim.ctr@us.af.mil; ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support from the Air Force Office of
Scientific Research and the computational resources and helpful support
provided by the AFRL DSRC.
NR 37
TC 5
Z9 5
U1 3
U2 38
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 4
PY 2015
VL 106
IS 18
AR 183707
DI 10.1063/1.4921012
PG 4
WC Physics, Applied
SC Physics
GA CH8AW
UT WOS:000354259200061
ER
PT J
AU Look, DC
Heller, ER
Yao, YF
Yang, CC
AF Look, David C.
Heller, Eric R.
Yao, Yu-Feng
Yang, C. C.
TI Significant mobility enhancement in extremely thin highly doped ZnO
films (vol 106, 152102, 2015)
SO APPLIED PHYSICS LETTERS
LA English
DT Correction
C1 [Look, David C.] Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
[Look, David C.] Wyle Labs Inc, Dayton, OH 45431 USA.
[Look, David C.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Heller, Eric R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Yao, Yu-Feng; Yang, C. C.] Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10617, Taiwan.
RP Look, DC (reprint author), Wright State Univ, Semicond Res Ctr, 3640 Colonel Glenn Hwy, Dayton, OH 45435 USA.
EM david.look@wright.edu; ccycc@ntu.edu.tw
NR 1
TC 0
Z9 0
U1 4
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 4
PY 2015
VL 106
IS 18
AR 189901
DI 10.1063/1.49198741
PG 1
WC Physics, Applied
SC Physics
GA CH8AW
UT WOS:000354259200065
ER
PT J
AU Drachuk, I
Suntivich, R
Calabrese, R
Harbaugh, S
Kelley-Loughnane, N
Kaplan, DL
Stone, M
Tsukruk, VV
AF Drachuk, Irina
Suntivich, Rattanon
Calabrese, Rossella
Harbaugh, Svetlana
Kelley-Loughnane, Nancy
Kaplan, David L.
Stone, Morley
Tsukruk, Vladimir V.
TI Printed Dual Cell Arrays for Multiplexed Sensing
SO ACS BIOMATERIALS SCIENCE & ENGINEERING
LA English
DT Article
DE inkjet printing; silk fibroin; cell encapsulation; dual cell arrays;
thin film biosensors
ID INKJET; SILK; MICROARRAYS; DEPOSITION; PARTICLES; VIABILITY; BACTERIA
AB We demonstrated inkjet printing of large-scale dual-type encapsulated bacterial cell arrays for prospective multiplexing sensing. The dual cell arrays were constructed on the basis of two types of bioengineered E. coli cells hosting fluorescent reporters (green-GFPal and red-turboRFP) capable of detecting different target chemicals. The versatility of inkjet printing allows for the fabrication of uniform multilayered confined structures composed of silk ionomers that served as nests for in-printing different cells. Furthermore, sequential encapsulation of "red" and "green" cells in microscopic silk nest arrays with the preservation of their function allowed for facile confinement of cells into microscopic silk nests, where cells retained dual red-green response to mixed analyte environment. Whole-cell dual arrays immobilized in microscopic biocompatible silk matrices were readily activated after prolonged storage (up to 3 months, ambient conditions), showing red green pattern and demonstrating an effective prototype of robust and long-living multiplexed biosensors for field applications.
C1 [Drachuk, Irina; Suntivich, Rattanon; Tsukruk, Vladimir V.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Calabrese, Rossella; Kaplan, David L.] Tufts Univ, Dept Biomed Engn, Medford, MA 02155 USA.
[Harbaugh, Svetlana; Kelley-Loughnane, Nancy; Stone, Morley] US Air Force, Res Lab, Directorate Human Effectiveness, Dayton, OH USA.
RP Tsukruk, VV (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM vladimir@mse.gatech.edu
FU (BIONIC Center) from Air Force Office of Scientific Research
[FA9550-14-1-0269, FA9550-09-1-0162]; National Science Foundation
[CBET-1402712]
FX The study was supported by Grants FA9550-14-1-0269 and FA9550-09-1-0162
(BIONIC Center) from Air Force Office of Scientific Research and
National Science Foundation CBET-1402712. We are grateful to Dr. M.
Chyasnavichyus for the help with digital image formatting and Dr. R.
Saldanha (AFRL) for plasmid pUC57:turboRFP.
NR 45
TC 0
Z9 0
U1 5
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2373-9878
J9 ACS BIOMATER SCI ENG
JI ACS Biomater. Sci. Eng.
PD MAY
PY 2015
VL 1
IS 5
BP 287
EP 294
DI 10.1021/ab500085k
PG 8
WC Materials Science, Biomaterials
SC Materials Science
GA DC6RN
UT WOS:000369347400001
ER
PT J
AU Dasari, CR
Gunther, S
Wisner, DH
Cooke, DT
Gold, CK
Wong, MS
AF Dasari, Chanukya R.
Gunther, Sven
Wisner, David H.
Cooke, David T.
Gold, Christopher K.
Wong, Michael S.
TI Rise in Microsurgical Free-Flap Breast Reconstruction in Academic
Medical Practices
SO ANNALS OF PLASTIC SURGERY
LA English
DT Article
ID IMPLANT RECONSTRUCTION; PATIENT SATISFACTION; PARADIGM SHIFT; TRENDS;
IMMEDIATE; OUTCOMES; COMPLICATIONS; EXPERIENCE; SURGEONS
AB Background
Previous studies have examined national trends in breast reconstruction, using various data sets demonstrating increases in implant-based reconstruction and decreases in autologous reconstruction. However, academic breast reconstruction practices have never been specifically characterized. The University Health Consortium-Association of American Medical Colleges Faculty Practice Solutions Center database contains comprehensive, factual billing and coding data from 90 academic medical centers in the United States, and has been used to characterize practice patterns of various academic surgical specialties.
Objective
To describe breast reconstruction trends unique to academic surgical practices, using the Faculty Practice Solutions Center database.
Methods
Annual data for defined breast reconstruction procedures (current procedural terminology codes: 19340, 19342, 19357, 19361, 19364, 19366, 19367, 19369, and 19380) performed by university plastic surgeons during calendar years 2007 to 2013 were included in the study.
Results
From 2007 to 2013, a 2-fold increase in the number of breast reconstruction procedures was observed (from a mean of 45.3 to 94.2 procedures per surgeon). During this period, implant-based reconstructions and autologous reconstructions rose in tandem (28.9-44.6 and 11.4-19.3, respectively), with a preserved 2.5:1 ratio between the 2 categories each year. When compared to reconstructions overall, the proportion of both implant reconstruction and autologous reconstruction procedures declined, since revision and other types of reconstructions increased (11% of all reconstructions in 2007 vs 32% in 2013). With regard to autologous reconstruction, microsurgical free flaps (mostly comprised of deep inferior epigastric artery perforator flaps) have supplanted latissimus flaps as the favored modality and comprised 13% to 14% of breast reconstruction cases overall from 2011 to 2013.
Conclusion
In contrast to national trends, university-based plastic surgeons are performing a growing number of microsurgical free flaps as the preferred method for autologous breast reconstruction. Whereas implant-based reconstructions still predominate in academic practices, the trend of increasing preference toward implant-based reconstructions has slowed in recent years and revision reconstructions are on the rise.
C1 [Dasari, Chanukya R.; Gunther, Sven; Wisner, David H.; Cooke, David T.; Wong, Michael S.] Univ Calif Davis, Div Plast Surg, Sacramento, CA 95817 USA.
[Gold, Christopher K.] Travis AFB, Div Plast Surg, Fairfield, CA USA.
RP Wong, MS (reprint author), Univ Calif Davis, Med Ctr, Div Plast Surg, Dept Surg, 2221 Stockton Blvd,Suite 2123, Sacramento, CA 95817 USA.
EM michael.wong@ucdmc.ucdavis.edu
NR 23
TC 2
Z9 2
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0148-7043
EI 1536-3708
J9 ANN PLAS SURG
JI Ann. Plast. Surg.
PD MAY
PY 2015
VL 74
SU 1
BP S62
EP S65
DI 10.1097/SAP.0000000000000483
PG 4
WC Surgery
SC Surgery
GA CQ5FV
UT WOS:000360629600015
PM 25785377
ER
PT J
AU Chandra, Y
Zhou, Y
Stanciulescu, I
Eason, T
Spottswood, S
AF Chandra, Yenny
Zhou, Yang
Stanciulescu, Ilinca
Eason, Thomas
Spottswood, Stephen
TI A robust composite time integration scheme for snap-through problems
SO COMPUTATIONAL MECHANICS
LA English
DT Article
DE Time integration; Nonlinear dynamics; Snap-through; Backward
differentiation formula
ID ELASTIC MULTIBODY SYSTEMS; INVARIANT CONSERVING/DISSIPATING ALGORITHMS;
MOMENTUM CONSERVING ALGORITHMS; IMPROVED NUMERICAL DISSIPATION; ENERGY
DECAYING SCHEME; NONLINEAR DYNAMICS; STRUCTURAL DYNAMICS; STEPPING
ALGORITHMS; FINITE ROTATIONS; SHELLS
AB A robust time integration scheme for snap-through buckling of shallow arches is proposed. The algorithm is a composite method that consists of three sub-steps. Numerical damping is introduced to the system by employing an algorithm similar to the backward differentiation formulas method in the last sub-step. Optimal algorithmic parameters are established based on stability criteria and minimization of numerical damping. The proposed method is accurate, numerically stable, and efficient as demonstrated through several examples involving loss of stability, large deformation, large displacements and large rotations.
C1 [Chandra, Yenny; Zhou, Yang; Stanciulescu, Ilinca] Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA.
[Eason, Thomas; Spottswood, Stephen] Air Force Res Lab, Struct Sci Ctr, Wright Patterson AFB, OH USA.
RP Stanciulescu, I (reprint author), Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA.
EM ilinca.s@rice.edu
OI Stanciulescu, Ilinca/0000-0003-4515-0363
FU AFOSR [FA9550-09-1-0201]; DOD under the High Performance Computing
Modernization Program (HPCMP) [GS04T09DBC0017]; Data Analysis and
Visualization Cyberinfrastructure - NSF [OCI-0959097]; Shared University
Grid at Rice - NSF [EIA-0216467]
FX The work has been funded in part by AFOSR under the Grant no.
FA9550-09-1-0201 and by DOD under the High Performance Computing
Modernization Program (HPCMP) under the Grant GS04T09DBC0017. Their
support is greatly appreciated. Support was also received from the Data
Analysis and Visualization Cyberinfrastructure funded by NSF under Grant
OCI-0959097 and the Shared University Grid at Rice funded by NSF under
Grant EIA-0216467, and a partnership between Rice University, Sun
Microsystems, and Sigma Solutions, Inc.
NR 48
TC 1
Z9 1
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0178-7675
EI 1432-0924
J9 COMPUT MECH
JI Comput. Mech.
PD MAY
PY 2015
VL 55
IS 5
BP 1041
EP 1056
DI 10.1007/s00466-015-1152-3
PG 16
WC Mathematics, Interdisciplinary Applications; Mechanics
SC Mathematics; Mechanics
GA CQ0QW
UT WOS:000360302800014
ER
PT J
AU Haddad, MR
Martinelli, D
Choi, EY
Zerfas, PM
Sullivan, P
Goldstein, DS
Abebe, DT
Centeno, JA
Kaler, SG
AF Haddad, Marie Reine
Martinelli, Diego
Choi, Eun-Young
Zerfas, Patricia M.
Sullivan, Patricia
Goldstein, David S.
Abebe, Daniel T.
Centeno, Jose A.
Kaler, Stephen G.
TI Survival, Growth, and Neurobehavioral Outcomes in a Mouse Model of
Menkes Disease With CSF-Directed AAV9 and Subcutaneous Copper Histidine
SO MOLECULAR THERAPY
LA English
DT Meeting Abstract
CT 18th Annual Meeting of the American-Society-of-Gene-and-Cell-Therapy
(ASGCT)
CY MAY 13-16, 2015
CL New Orleans, LA
SP Amer Soc Gene & Cell Therapy
C1 [Haddad, Marie Reine; Martinelli, Diego; Choi, Eun-Young; Kaler, Stephen G.] NICHD, Sect Translat Neurosci, Program Mol Med, NIH, Bethesda, MD USA.
[Zerfas, Patricia M.] NIH, Diagnost & Res Serv Branch, OD, Bethesda, MD 20892 USA.
[Sullivan, Patricia; Goldstein, David S.] NINDS, Clin Neurocardiol Sect, NIH, Bethesda, MD 20892 USA.
[Abebe, Daniel T.] NICHD, Res Anim Management Branch, NIH, Bethesda, MD USA.
[Centeno, Jose A.] Andrews AFB, Malcolm Grow, Joint Pathol Ctr, Div Biophys Toxicol, Camp Springs, MD USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1525-0016
EI 1525-0024
J9 MOL THER
JI Mol. Ther.
PD MAY
PY 2015
VL 23
SU 1
MA 197
BP S78
EP S78
PG 1
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Medicine,
Research & Experimental
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Research &
Experimental Medicine
GA CP5UY
UT WOS:000359951700198
ER
PT J
AU Bishop, NA
Miller, J
Zeppettella, D
Baron, W
Tuss, J
Ali, M
AF Bishop, Nicholas A.
Miller, Jason
Zeppettella, David
Baron, William
Tuss, James
Ali, Mohammod
TI A Broadband High-Gain Bi-Layer LPDA for UHF Conformal Load-Bearing
Antenna Structures (CLASs) Applications
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Array; broadband antenna; conformal load bearing antenna structure
(CLAS); endfire; log-periodic; LPDA; ultrawideband (UWB)
ID PERIODIC DIPOLE ARRAY; DESIGN
AB A broadband high-gain bi-layer log-periodic dipole array (LPDA) is introduced for conformal load bearing antenna structures (CLASs) applications. Under the proposed scheme, the two layers of the LPDA are printed on two separate thin dielectric substrates which are substantially separated from each other. A meander line geometry is adapted to achieve size reduction for the array. The fabricated and tested array easily exceeds more than an octave of gain, pattern, and VSWR bandwidth.
C1 [Bishop, Nicholas A.; Ali, Mohammod] Univ S Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
[Miller, Jason; Zeppettella, David; Baron, William; Tuss, James] AFRL, Wright Patterson AFB, OH 45433 USA.
RP Bishop, NA (reprint author), Univ S Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
EM bish-opna@email.sc.edu; Jason.miller.ctr@wpafb.af.mil;
david.zeppettella@wpafb.af.mil; william.baron@wpafb.af.mil;
james.tuss@wpafb.af.mil; alimo@cec.sc.edu
FU Air Force Research Laboratory (AFRL), Wright Patterson Air Force Base
[12-S2603-04-C01, 88ABW-2014-3668]
FX This work was supported in part by the Air Force Research Laboratory
(AFRL), Wright Patterson Air Force Base, Contract 12-S2603-04-C01.
Cleared for Public Release-Case Number: 88ABW-2014-3668.
NR 32
TC 2
Z9 2
U1 4
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
EI 1558-2221
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD MAY
PY 2015
VL 63
IS 5
BP 2359
EP 2364
DI 10.1109/TAP.2015.2409866
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA CK8UH
UT WOS:000356513700053
ER
PT J
AU Matis, BA
Wang, G
Matis, JI
Cook, NB
Eckert, GJ
AF Matis, B. A.
Wang, G.
Matis, J. I.
Cook, N. B.
Eckert, G. J.
TI White Diet: Is It Necessary During Tooth Whitening?
SO OPERATIVE DENTISTRY
LA English
DT Article
ID SMALL COLOR DIFFERENCES; CLINICAL-EVALUATION; RED WINE; BLEACHED ENAMEL;
IN-OFFICE; AGENTS; COFFEE
AB Patients are sometimes blamed for a reduced effect of bleaching when they do not adhere to a dentist's prescribed white diet. This study aimed to determine whether a white diet is necessary by evaluating the effects of coffee, tea, wine, and dark fruits on the potential tooth whitening during the bleaching process. Each of the effects of discoloration was categorized as "yes'' or "no'' based on a patient questionnaire. Data from five published studies were included in the analyses. Outcomes were based on the color change between baseline and the end of bleaching. The relationships between color changes were measured subjectively and objectively. A nonwhite diet was not significantly associated with less tooth whitening, and there was only a weak positive association between tooth whitening and diet for subjects who drank large amounts of coffee/tea.
C1 [Matis, B. A.] Indiana Univ, Sch Dent, Dept Restorat Dent, Indianapolis, IN 46204 USA.
[Wang, G.] Wuhan Univ, Sch & Hosp Stomatol, Hubei MOST KLOS & KLOBM, Wuhan 430072, Peoples R China.
[Matis, J. I.] US Air Force, Eielson Air Force Base, Air Force Base, AK USA.
[Cook, N. B.] Indiana Univ, Sch Dent, Dept Restorat Dent, Indianapolis, IN 46204 USA.
[Eckert, G. J.] Indiana Univ, Sch Dent, Dept Biostat, Indianapolis, IN 46204 USA.
RP Wang, G (reprint author), 237 Louyo Rd, Wuhan 430079, Hunan, Peoples R China.
EM wanggeinus@aliyun.com
NR 20
TC 2
Z9 2
U1 0
U2 2
PU OPERATIVE DENTISTRY INC
PI INDIANAPOLIS
PA INDIANA UNIV SCHOOL DENTISTRY, ROOM S411, 1121 WEST MICHIGAN ST,
INDIANAPOLIS, IN 46202-5186 USA
SN 0361-7734
EI 1559-2863
J9 OPER DENT
JI Oper. Dent.
PD MAY-JUN
PY 2015
VL 40
IS 3
BP 235
EP 240
DI 10.2341/14-019-LIT
PG 6
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA CK9CS
UT WOS:000356538700002
PM 25748208
ER
PT J
AU Redmon, RJ
Rodriguez, JV
Green, JC
Ober, D
Wilson, G
Knipp, D
Kilcommons, L
McGuire, R
AF Redmon, Rob J.
Rodriguez, Juan V.
Green, Janet C.
Ober, Dan
Wilson, Gordon
Knipp, Delores
Kilcommons, Liam
McGuire, Robert
TI Improved Polar and Geosynchronous Satellite Data Sets Available in
Common Data Format at the Coordinated Data Analysis Web
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
DE POES; GOES; DMSP
C1 [Redmon, Rob J.; Rodriguez, Juan V.] NOAAs Natl Geophys Data Center, Boulder, CO 80305 USA.
[Rodriguez, Juan V.] Univ Colorado, Boulders Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[Green, Janet C.] Space Hazards Applicat, Boulder, CO USA.
[Ober, Dan; Wilson, Gordon] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Knipp, Delores; Kilcommons, Liam] Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA.
[McGuire, Robert] NASAs Space Phys Data Facility, Boulder, CO USA.
RP Redmon, RJ (reprint author), NOAAs Natl Geophys Data Center, Boulder, CO 80305 USA.
EM rob.redmon@noaa.gov; juan.rodriguez@noaa.gov; jgreen@spacehaz.com;
daniel.ober.1@us.af.mil; gordon.wilson@us.af.mil;
delores.knipp@colorado.edu; liam.kilcommons@colorado.edu;
robert.e.mcguire@nasa.gov
FU NASA [NNX13AG07G]
FX The DMSP effort was partially supported by NASA grant NNX13AG07G. The
data described in this article are freely available at the websites
listed in the General Comments section.
NR 11
TC 3
Z9 3
U1 0
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD MAY
PY 2015
VL 13
IS 5
BP 254
EP 256
DI 10.1002/2015SW001176
PG 3
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA CL0HX
UT WOS:000356623500003
ER
PT J
AU Winter, LM
Balasubramaniam, K
AF Winter, L. M.
Balasubramaniam, K.
TI Using the maximum X-ray flux ratio and X-ray background to predict solar
flare class
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
DE X-ray flares
ID EMISSION MEASURES; ACTIVE REGIONS; 1-8 ANGSTROM; TEMPERATURES;
EXPRESSIONS; PARAMETERS; AVALANCHES; PYTHON
AB We present the discovery of a relationship between the maximum ratio of the flare flux (namely, 0.5-4 angstrom to the 1-8 angstrom flux) and nonflare background (namely, the 1-8 angstrom background flux), which clearly separates flares into classes by peak flux level. We established this relationship based on an analysis of the Geostationary Operational Environmental Satellites X-ray observations of similar to 50,000 X, M, C, and flares derived from the NOAA/Space Weather Prediction Center flares catalog. Employing a combination of machine learning techniques (K-nearest neighbors and nearest centroid algorithms) we show a separation of the observed parameters for the different peak flaring energies. This analysis is validated by successfully predicting the flare classes for 100% of the X-class flares, 76% of the M-class flares, 80% of the C-class flares, and 81% of the B-class flares for solar cycle 24, based on the training of the parametric extracts for solar flares in cycles 22-23.
C1 [Winter, L. M.] Atmospher & Environm Res, Superior, CO 80301 USA.
[Balasubramaniam, K.] Air Force Res Lab, Albuquerque, NM USA.
RP Winter, LM (reprint author), Atmospher & Environm Res, Superior, CO 80301 USA.
EM lwinter@aer.com
OI Winter, Lisa/0000-0002-3983-020X
FU AFOSR; AFRL [FA8718-05-C-0036]
FX The GOES XRS data used in this paper are available at
http://www.ngdc.noaa.gov/stp/satellite/goes/dataaccess.html. The NOAA
X-ray Flare Lists were downloaded from NOAA NGDC through the FTP site
linked from here: http://www.ngdc.noaa.gov/nndc/struts/results?t=102827
(TM) s=25 (TM) d=8,230,9. The monthly sunspot number was obtained from
NASA Marshall Space Flight Centers compilation available here:
http://solarscience.msfc.nasa.gov/greenwch/spot_num.txt. K.S.B.
expresses gratitude to AFOSR for supporting the AFRL Task on Flares and
CMEs. L.M.W. is supported by AFRL contract FA8718-05-C-0036. The authors
thank Doug Biesecker (NOAA SWPC) for useful discussion during the 2014
SHINE conference that led to investigating the Rmax ratio,
which became a focal point of this paper.
NR 36
TC 3
Z9 3
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD MAY
PY 2015
VL 13
IS 5
BP 286
EP 297
DI 10.1002/2015SW001170
PG 12
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA CL0HX
UT WOS:000356623500007
ER
PT J
AU Soeken, TA
Apsey, DA
Townley, JR
Haas, RW
Caldwell, MC
AF Soeken, Timothy A.
Apsey, Douglas A.
Townley, James R.
Haas, Roy W.
Caldwell, Matthew C.
TI Comparison of Pachymetry Measurements Between the Alcon Wavelight EX500
and Sonogage Corneo-Gage Plus Platforms
SO JOURNAL OF REFRACTIVE SURGERY
LA English
DT Article
ID LOW-COHERENCE REFLECTOMETRY; OPEN-ANGLE GLAUCOMA; THICKNESS
MEASUREMENTS; ULTRASOUND PACHYMETRY; OCULAR HYPERTENSION; FLAP
THICKNESS; REPEATABILITY; TOMOGRAPHY; AGREEMENT; DEVICES
AB PURPOSE: To compare the agreement of intraoperative central corneal thickness (CCT) measurements of the Wavelight EX500 (Alcon Laboratories, Fort Worth, TX) that uses optical low coherence reflectometry to the Corneo-Gage Plus ultrasound pachymetry device (Sonogage, Cleveland, OH).
METHODS: In this retrospective study, 50 eyes of 26 patients undergoing LASIK were evaluated. Following LASIK flap creation, each eye was measured by both optical low coherence reflectometry and ultrasound pachymetry immediately prior to flap lifting and then again after flap lifting.
RESULTS: The mean CCT value before lifting the flap was 556.9 and 557.78 mu m as measured by ultrasound pachymetry and optical low coherence reflectometry, respectively. After lifting the flap, the mean ultrasound pachymetry value was 440.96 mu m and the mean optical low coherence reflectometry value was 441.7 mu m. A two-sample Kolmogorov-Smirnov test demonstrated that the ultrasound pachymetry and the optical low coherence reflectometry distribution of measurements were the same. A Shapiro-Wilk test of normality could not be rejected. Bland-Altman plots showed strong agreement. The correlation between the two tests was 0.98 before flap lifting and 0.97 after flap lifting, both with a 95% confidence interval.
CONCLUSIONS: The pachymetry measurements by the optical low coherence reflectometry correlated with those of the ultrasound pachymetry device. The Wavelight EX500 optical low coherence reflectometry may be used in place of the ultrasound pachymetry device for measuring CCT.
C1 [Soeken, Timothy A.; Apsey, Douglas A.; Townley, James R.; Caldwell, Matthew C.] Joint Warfighter Refract Surg Ctr, Lackland AFB, TX USA.
[Soeken, Timothy A.] Baylor Coll Med, Houston, TX 77030 USA.
[Haas, Roy W.] Decypher Technol, Lackland AFB, TX USA.
RP Soeken, TA (reprint author), Wilford Hall Ambulatory Surg Ctr, Joint Warfighter Refract Surg Ctr, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA.
EM timsoeken05@hotmail.com
NR 17
TC 0
Z9 0
U1 0
U2 1
PU SLACK INC
PI THOROFARE
PA 6900 GROVE RD, THOROFARE, NJ 08086 USA
SN 1081-597X
EI 1938-2391
J9 J REFRACT SURG
JI J. Refractive Surg.
PD MAY
PY 2015
VL 31
IS 5
BP 328
EP 332
DI 10.3928/1081597X-20150423-06
PG 5
WC Ophthalmology; Surgery
SC Ophthalmology; Surgery
GA CK3WP
UT WOS:000356147500007
PM 25974972
ER
PT J
AU Krygier, AG
Morrison, JT
Kar, S
Ahmed, H
Alejo, A
Clarke, R
Fuchs, J
Green, A
Jung, D
Kleinschmidt, A
Najmudin, Z
Nakamura, H
Norreys, P
Notley, M
Oliver, M
Roth, M
Vassura, L
Zepf, M
Borghesi, M
Freeman, RR
AF Krygier, A. G.
Morrison, J. T.
Kar, S.
Ahmed, H.
Alejo, A.
Clarke, R.
Fuchs, J.
Green, A.
Jung, D.
Kleinschmidt, A.
Najmudin, Z.
Nakamura, H.
Norreys, P.
Notley, M.
Oliver, M.
Roth, M.
Vassura, L.
Zepf, M.
Borghesi, M.
Freeman, R. R.
TI Selective deuterium ion acceleration using the Vulcan petawatt laser
SO PHYSICS OF PLASMAS
LA English
DT Article
ID PLASMA INTERACTION; PROTON-BEAMS; INTENSE; GENERATION; DRIVEN; PULSES
AB We report on the successful demonstration of selective acceleration of deuterium ions by target-normal sheath acceleration (TNSA) with a high-energy petawatt laser. TNSA typically produces a multi-species ion beam that originates from the intrinsic hydrocarbon and water vapor contaminants on the target surface. Using the method first developed by Morrison et al. [Phys. Plasmas 19, 030707 (2012)], an ion beam with > 99% deuterium ions and peak energy 14 MeV/nucleon is produced with a 200 J, 700 fs, > 10(20)W/cm(2) laser pulse by cryogenically freezing heavy water (D2O) vapor onto the rear surface of the target prior to the shot. Within the range of our detectors (0 degrees-8.5 degrees), we find laser-to-deuterium-ion energy conversion efficiency of 4.3% above 0.7 MeV/nucleon while a conservative estimate of the total beam gives a conversion efficiency of 9.4%. (C) 2015 AIP Publishing LLC.
C1 [Krygier, A. G.; Fuchs, J.; Vassura, L.] Ecole Polytech, Lab Utilisat Lasers Intenses, F-91128 Palasiseau, France.
[Krygier, A. G.; Freeman, R. R.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Morrison, J. T.] Air Force Res Lab, Prop Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Kar, S.; Ahmed, H.; Alejo, A.; Green, A.; Jung, D.; Zepf, M.; Borghesi, M.] Queens Univ Belfast, Sch Math & Phys, Ctr Plasma Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Clarke, R.; Norreys, P.; Notley, M.] Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England.
[Kleinschmidt, A.; Roth, M.] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
[Najmudin, Z.; Nakamura, H.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Blackett Lab, John Adams Inst, London SW7 2AZ, England.
[Norreys, P.; Oliver, M.] Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
[Zepf, M.] Helmholtz Inst Jena, D-07743 Jena, Germany.
[Borghesi, M.] ASCR, ELI Beamlines Project, Inst Phys, Prague 18221, Czech Republic.
RP Krygier, AG (reprint author), Ecole Polytech, Lab Utilisat Lasers Intenses, F-91128 Palasiseau, France.
EM s.kar@qub.ac.uk
RI Fuchs, Julien/D-3450-2016; Kar, Satyabrata/E-5220-2010
OI Fuchs, Julien/0000-0001-9765-0787;
FU United States Department of Energy [DE-FC02-04ER54789]; Quantum and
Non-Equilibrium Processes Department of the Air Force Office of
Scientific Research; EPSRC [EP/J002550/1, EP/L002221/1, EP/K022415/1];
European Social Fund; state budget of the Czech Republic
[CZ.1.05/1.1.00/483/02.0061, CZ.1.07/2.3.00/20.0279]
FX We are grateful for the dedicated work of laser operators, engineers,
and technicians at Rutherford Appleton Laboratory who supported this
experiment. A.G.K. and R.R.F. acknowledge funding from the United States
Department of Energy through Contract No. DE-FC02-04ER54789. J.T.M.
acknowledges funding from the Quantum and Non-Equilibrium Processes
Department of the Air Force Office of Scientific Research, under the
management of Dr. Enrique Parra, Program Manager. We also acknowledge
funding from EPSRC, through Grants EP/J002550/1-Career Acceleration
Fellowship held by S.K., EP/L002221/1, and EP/K022415/1. M.B.
acknowledges co-financing by the European Social Fund and the state
budget of the Czech Republic (Project Nos. CZ.1.05/1.1.00/483/02.0061
and CZ.1.07/2.3.00/20.0279).
NR 32
TC 7
Z9 7
U1 7
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2015
VL 22
IS 5
AR 053102
DI 10.1063/1.4919618
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA CJ9AI
UT WOS:000355794300055
ER
PT J
AU Bedford, NM
Ramezani-Dakhel, H
Slocik, JM
Briggs, BD
Ren, Y
Frenkel, AI
Petkov, V
Heinz, H
Naik, RR
Knecht, MR
AF Bedford, Nicholas M.
Ramezani-Dakhel, Hadi
Slocik, Joseph M.
Briggs, Beverly D.
Ren, Yang
Frenkel, Anatoly I.
Petkov, Valeri
Heinz, Hendrik
Naik, Rajesh R.
Knecht, Marc R.
TI Elucidation of Peptide-Directed Palladium Surface Structure for
Biologically Tunable Nanocatalysts
SO ACS NANO
LA English
DT Article
DE biotemplating; peptides; atomic pair distribution function; molecular
dynamics simulations; catalysis
ID X-RAY-DIFFRACTION; PAIR DISTRIBUTION-FUNCTIONS; MONTE-CARLO-SIMULATION;
BIOMIMETIC SYNTHESIS; ENABLED SYNTHESIS; AQUEOUS-SOLUTION; FORCE-FIELDS;
NANOPARTICLES; ADSORPTION; GOLD
AB Peptide-enabled synthesis of inorganic nanostructures represents an avenue to access catalytic materials with tunable and optimized properties. This is achieved via peptide complexity and programmability that is missing in traditional ligands for catalytic nanomaterials. Unfortunately, there is limited information available to correlate peptide sequence to particle structure and catalytic activity to date. As such, the application of peptide-enabled nanocatalysts remains limited to trial and error approaches. In this paper, a hybrid experimental and computational approach is introduced to systematically elucidate biomolecule-dependent structure/function relationships for peptide-capped Pd nanocatalysts. Synchrotron X-ray techniques were used to uncover substantial particle surface structural disorder, which was dependent upon the amino acid sequence of the peptide capping ligand. Nanocatalyst configurations were then determined directly from experimental data using reverse Monte Carlo methods and further refined using molecular dynamics simulation, obtaining thermodynamically stable peptide-Pd nanoparticle configurations. Sequence-dependent catalytic property differences for C-C coupling and olefin hydrogenation were then eluddated by identification of the catalytic active sites at the atomic level and quantitative prediction of relative reaction rates. This hybrid methodology provides a clear route to determine peptide-dependent structure/function relationships, enabling the generation of guidelines for catalyst design through rational tailoring of peptide sequences.
C1 [Bedford, Nicholas M.; Slocik, Joseph M.; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Bedford, Nicholas M.; Briggs, Beverly D.; Knecht, Marc R.] Univ Miami, Dept Chem, Coral Gables, FL 33146 USA.
[Ramezani-Dakhel, Hadi; Heinz, Hendrik] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA.
[Ren, Yang] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Frenkel, Anatoly I.] Yeshiva Univ, Dept Phys, New York, NY 10016 USA.
[Petkov, Valeri] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48858 USA.
RP Bedford, NM (reprint author), NIST, Appl Chem & Mat Div, Boulder, CO 80305 USA.
EM nicholas.bedford@nist.gov; hendrik.heinz@uakron.edu;
rajesh.naik@us.af.mil; knecht@miami.edu
RI Frenkel, Anatoly/D-3311-2011; Heinz, Hendrik/E-3866-2010
OI Frenkel, Anatoly/0000-0002-5451-1207; Heinz, Hendrik/0000-0002-6776-7404
FU US Air Force Office of Scientific Research; National Science Foundation
[CBET-1033334, DMR-0955071, DMR-1437355]; US Department of Energy
[DE-FG0203ER15476, DE-SC000687]; University of Miami; University of
Akron; Synchrotron Catalysis Consortium, U.S. Department of Energy
[DE-FG0205ER15688]; National Research Council; [DE-AC02-06CH11357]
FX This work was supported in part by the US Air Force Office of Scientific
Research (R.R.N), National Science Foundation (M.R.K. CBET-1033334, H.H.
DMR-0955071, DMR-1437355), and US Department of Energy (A.F
DE-FG0203ER15476, V.P. DE-SC000687). Further financial support was
provided by the University of Miami and the University of Akron. Use of
beamline 11-ID-C at the APS, an Office of Science User Facility operated
by the US Department of Energy, was supported under Contract No.
DE-AC02-06CH11357. Beamline X18B at the NSLS is supported in part by the
Synchrotron Catalysis Consortium, U.S. Department of Energy, Grant No.
DE-FG0205ER15688. N.M.B. acknowledges fellowship support from the
National Research Council Research Associateship award. H.R. and H.H.
further acknowledge the allocation of computing resources at the Ohio
Supercomputer Center.
NR 58
TC 24
Z9 24
U1 13
U2 62
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD MAY
PY 2015
VL 9
IS 5
BP 5082
EP 5092
DI 10.1021/acsnano.5b00168
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA CJ3KR
UT WOS:000355383000044
PM 25905675
ER
PT J
AU Hu, DH
Liu, Q
Tisdale, J
Lei, T
Pei, J
Wang, H
Urbas, A
Hu, B
AF Hu, Dehua
Liu, Qing
Tisdale, Jeremy
Lei, Ting
Pei, Jian
Wang, Hsin
Urbas, Augustine
Hu, Bin
TI Seebeck Effects in N-Type and P-Type Polymers Driven Simultaneously by
Surface Polarization and Entropy Differences Based on
Conductor/Polymer/Conductor Thin-Film Devices
SO ACS NANO
LA English
DT Article
DE Seebeck effects; charge-transfer states; surface polarization; entropy
difference; n-type organic polymer; p-type organic polymer
ID ENHANCEMENT; DENSITY; VOLTAGE; STATES
AB This paper reports Seebeck effects driven by both surface polarization difference and entropy difference by using photoinduced intramolecular charge-transfer states in n-type and p-type conjugated polymers, namely IIDT and IIDDT, respectively, based on vertical conductor/polymer/conductor thin-film devices. We obtain large Seebeck coefficients of 898 mu V/K from n-type IIDT and 1300 mu V/K from p-type IIDDT when the charge-transfer states are generated by a white light illumination of 100 mW/cm(2), compared with the values of 380 and 4700 mu V/K in dark condition, respectively. Simultaneously, the electrical conductivities are increased from almost insulating state in dark condition to conducting state under photoexcitation in both n-type IIDT and p-type IIDDT based devices. The large Seebeck effects can be attributed to the following two mechanisms. First, the intramolecular charge-transfer states exhibit strong electron phonon coupling, which leads to a polarization difference between high and low temperature surfaces. This polarization difference essentially forms a temperature-dependent electric field, functioning as a new driving force additional to entropy difference, to drive the energetic carriers for the development of Seebeck effects under a temperature difference. Second, the intramolecular charge-transfer states generate negative or positive majority carriers (electrons or holes) in the n-type IIDT or p-type IIDDT, ready to be driven between high and low temperature surfaces for developing Seebeck effects. On the basis of coexisted polarization difference and entropy difference, the intramolecular charge-transfer states can largely enhance the Seebeck effects in both n-type IIDT and p-type IIDDT devices. Furthermore, we find that changing electrical conductivity can switch the Seebeck effects between polarization and entropy regimes when the charge-transfer states are generated upon applying photoexcitation. Therefore, using intramolecular charge-transfer states presents an approach to develop thermoelectric effects in organic materials-based vertical conductor/polymer/conductor thin-film devices.
C1 [Hu, Bin] Beijing Jiaotong Univ, Coll Sci, Beijing 100044, Peoples R China.
[Hu, Dehua; Liu, Qing; Tisdale, Jeremy; Hu, Bin] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Lei, Ting; Pei, Jian] Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Bioorgan Chem & Mol Engn, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China.
[Wang, Hsin] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Urbas, Augustine] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hu, B (reprint author), Beijing Jiaotong Univ, Coll Sci, Beijing 100044, Peoples R China.
EM bhu@utk.edu
RI Wang, Hsin/A-1942-2013
OI Wang, Hsin/0000-0003-2426-9867
FU NSF [ECCS-0644945]; Oak Ridge National Laboratory by the Division of
Scientific User Facilities, U.S. Department of Energy [CNMS2012-106,
CNMS2012-107]; UT-Battelle LLC [DE-AC05000OR22725]; National Significant
Program [2014CB643506, 2013CB922104]; National Science Foundation
[61077020, 61205034, 61475051]
FX The authors would like to acknowledge the financial supports from the
NSF (ECCS-0644945). This research was partially conducted at the Center
for Nanophase Materials Sciences based on user project (CNMS2012-106 and
CNMS2012-107), which is sponsored at Oak Ridge National Laboratory by
the Division of Scientific User Facilities, U.S. Department of Energy.
H. Wang would like to thank the support of the assistant secretary for
Energy Efficiency and Renewable Energy of the Department of Energy and
the Propulsion Materials program under the Vehicle Technologies program.
Oak Ridge National Laboratory is managed by UT-Battelle LLC under
contract DE-AC05000OR22725. The authors also acknowledge the project
support from National Significant Program (2014CB643506, 2013CB922104)
and National Science Foundation (Grant Nos. 61077020, 61205034,
61475051).
NR 22
TC 7
Z9 7
U1 10
U2 72
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD MAY
PY 2015
VL 9
IS 5
BP 5208
EP 5213
DI 10.1021/acsnano.5b00589
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA CJ3KR
UT WOS:000355383000056
PM 25877512
ER
PT J
AU Grayson, JK
Shinn, AM
Potts, MV
Hatzfeld, JJ
Cline, JM
AF Grayson, J. Kevin
Shinn, Antoinette M.
Potts, M. Vicki
Hatzfeld, Jennifer J.
Cline, Jerry M.
TI Comparison of a Ferret Model with an Inanimate Simulator for Training
Novices in Techniques for Intubating Neonates
SO JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE
LA English
DT Article
ID ENDOTRACHEAL INTUBATION; TRACHEAL INTUBATION; AIRWAY MANAGEMENT;
RESIDENTS; TRAINEES; RESUSCITATION; PERFORMANCE; IMPROVEMENT;
CONFIDENCE; SUCCESS
AB Simulators for neonatal intubation training have improved, prompting us to compare a state-of-the-art simulator with live ferrets for training novice family-medicine residents in this crucial skill. After a scripted didactic presentation, we used a crossover study design and randomly assigned residents to receive simulator or live ferret training, after which they repeated the procedure by using the opposite method. Participants were asked to report their level of confidence and competence before and after each training session and the usefulness of each training method. In addition, residents were videotaped performing the procedure and evaluated by using a modified global rating scale. The 2 methods did not differ in regard to self-reported confidence, competence, or usefulness of each training procedure. A majority of participants indicated that they preferred using the ferrets over the simulator, with realism cited most frequently as the reason for their choice. Videotape scores for time and motion and flow of the procedure were higher when the simulator was used, but higher for instrument handling when ferrets were intubated. Overall scores were higher for videotaped evaluations with the simulator compared with the ferrets. According to these findings, the simulator appears to provide adequate instruction for the initial training of novice learners in neonatal intubation techniques.
C1 [Grayson, J. Kevin; Shinn, Antoinette M.; Potts, M. Vicki; Hatzfeld, Jennifer J.] Travis AFB, Clin Invest Facil, David Grant US Air Force Med Ctr, Fairfield, CA 94535 USA.
[Cline, Jerry M.] Travis AFB, Dept Family Med, David Grant US Air Force Med Ctr, Fairfield, CA USA.
RP Grayson, JK (reprint author), Travis AFB, Clin Invest Facil, David Grant US Air Force Med Ctr, Fairfield, CA 94535 USA.
EM john.grayson.1@us.af.mil
FU Air Force Medical Support Agency Clinical Investigations Program
FX We thank the veterinary and clinical coordinator staffs of the Clinical
Investigation Facility (David Grant USAF Medical Center) and the
contributions of Dr Brian Montenegro. Study funding was received from
the Air Force Medical Support Agency Clinical Investigations Program.
The views expressed in this material are those of the authors and do not
reflect the official policy or position of the US Government, the
Department of Defense, or the Department of the Air Force. The work
reported herein was performed under United States Air Force Surgeon
General approved clinical investigations numbers FDG20110035A and
FDG20110042E. The animals involved in this study were procured,
maintained, and used in accordance with the Laboratory Animal Welfare
Act of 1966, as amended, and the Guide for the Care and Use of
Laboratory Animals (National Research Council). The voluntary, fully
informed consent of the subjects used in this research was obtained as
required by 32 CFR 219 and Air Force Instruction 40-402, Protection of
Human Subjects in Biomedical and Behavioral Research.
NR 27
TC 1
Z9 1
U1 0
U2 0
PU AMER ASSOC LABORATORY ANIMAL SCIENCE
PI MEMPHIS
PA 9190 CRESTWYN HILLS DR, MEMPHIS, TN 38125 USA
SN 1559-6109
J9 J AM ASSOC LAB ANIM
JI J. Amer. Assoc. Lab. Anim. Sci.
PD MAY
PY 2015
VL 54
IS 3
BP 286
EP 290
PG 5
WC Veterinary Sciences; Zoology
SC Veterinary Sciences; Zoology
GA CJ6YY
UT WOS:000355642300007
PM 26045454
ER
PT J
AU Eovaldi, B
Dunn, DP
AF Eovaldi, Benjamin
Dunn, Dell P.
TI Case Report: Corpus Cavernosum Thrombosis Occurring During a Long-Range
Aviation Mission Initially Diagnosed as Lymphoma
SO MILITARY MEDICINE
LA English
DT Article
ID IDIOPATHIC PARTIAL THROMBOSIS; SEGMENTAL THROMBOSIS; MANAGEMENT;
FLIGHTS; RISK
AB A 23-year-old active duty United States Air Force air crew male presented to the flight medicine clinic in Germany after experiencing sudden onset penile pain while flying as part of a long-range operational mission. He was admitted to the German hospital and empirically treated for infection with antibiotics, which did not improve his symptoms. Initial magnetic resonance imaging of the pelvis with and without intravenous contrast was reported to be concerning for lymphoma, which prompted transport to a regional medical center in the United States. Further evaluation and review of the pelvic magnetic resonance imaging established a diagnosis of corpus cavernosum thrombosis. Conservative management with 3 months of standard anticoagulation therapy was effective in resolving the patient's symptoms. Corpus cavernosum thrombosis is a rare condition which appears to be associated with prolonged air travel that can easily be misdiagnosed as a much more serious condition; however, once accurate diagnosis is made, it is easily managed and treated.
C1 [Eovaldi, Benjamin] 30th Med Operat Squadron, Vandenberg AFB, CA 93437 USA.
[Dunn, Dell P.] 60th Diagnost & Therapeut Squadron, Travis AFB, CA 94535 USA.
RP Eovaldi, B (reprint author), 30th Med Operat Squadron, 338 South Dakota Ave,Bldg 13850, Vandenberg AFB, CA 93437 USA.
NR 16
TC 0
Z9 0
U1 1
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2015
VL 180
IS 5
BP E608
EP E610
DI 10.7205/MILMED-D-14-00506
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA CJ5WF
UT WOS:000355562600003
PM 25939120
ER
PT J
AU Rajendran, J
Karri, R
Wendt, JB
Potkonjak, M
McDonald, N
Rose, GS
Wysocki, B
AF Rajendran, Jeyavijayan
Karri, Ramesh
Wendt, James B.
Potkonjak, Miodrag
McDonald, Nathan
Rose, Garrett S.
Wysocki, Bryant
TI Nano Meets Security: Exploring Nanoelectronic Devices for Security
Applications
SO PROCEEDINGS OF THE IEEE
LA English
DT Article
DE Emerging technologies; hardware security; memristors; PCMs; physical
unclonable functions
ID PHYSICAL UNCLONABLE FUNCTIONS; PHASE-CHANGE MEMORY; SPIN-TRANSFER
TORQUE; CIRCUIT; CRYPTOGRAPHY; RESISTANCE; MEMRISTOR; GENERATOR; DESIGN;
POWER
AB Information security has emerged as an important system and application metric. Classical security solutions use algorithmic mechanisms that address a small subset of emerging security requirements, often at high-energy and performance overhead. Further, emerging side-channel and physical attacks can compromise classical security solutions. Hardware security solutions overcome many of these limitations with less energy and performance overhead. Nanoelectronics-based hardware security preserves these advantages while enabling conceptually new security primitives and applications. This tutorial paper shows how one can develop hardware security primitives by exploiting the unique characteristics such as complex device and system models, bidirectional operation, and nonvolatility of emerging nanoelectronic devices. This paper then explains the security capabilities of several emerging nanoelectronic devices: memristors, resistive random-access memory, contact-resistive random-access memory, phase change memories, spin torque-transfer random-access memory, orthogonal spin transfer random access memory, graphene, carbon nanotubes, silicon nanowire field-effect transistors, and nanoelectronic mechanical switches. Further, the paper describes hardware security primitives for authentication, key generation, data encryption, device identification, digital forensics, tamper detection, and thwarting reverse engineering. Finally, the paper summarizes the outstanding challenges in using emerging nanoelectronic devices for security.
C1 [Rajendran, Jeyavijayan; Karri, Ramesh] NYU, New York, NY 10003 USA.
[Wendt, James B.; Potkonjak, Miodrag] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[McDonald, Nathan; Wysocki, Bryant] US Air Force, Res Labs, Rome, NY USA.
[Rose, Garrett S.] Univ Tennessee, Knoxville, TN 37996 USA.
RP Rajendran, J (reprint author), NYU, 550 1St Ave, New York, NY 10003 USA.
EM jv.ece@nyu.edu; rkarri@poly.edu; jwendt@cs.ucla.edu;
miodrag@cs.ucla.edu; Nathan.McDonald@rl.af.mil; garose@utk.edu;
Bryant.Wysocki@rl.af.mil
NR 74
TC 12
Z9 12
U1 2
U2 21
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9219
EI 1558-2256
J9 P IEEE
JI Proc. IEEE
PD MAY
PY 2015
VL 103
IS 5
BP 829
EP 849
DI 10.1109/JPROC.2014.2387353
PG 21
WC Engineering, Electrical & Electronic
SC Engineering
GA CJ8LK
UT WOS:000355751900008
ER
PT J
AU Gray, RE
Gaddey, HL
AF Gray, Richard E.
Gaddey, Heidi L.
TI RADIOLOGY REPORT An imaging guide to abdominal pain
SO JOURNAL OF FAMILY PRACTICE
LA English
DT Editorial Material
C1 [Gaddey, Heidi L.] Univ Nebraska Med Ctr, Family Med Residency Program, Offutt AFB, NE 68113 USA.
[Gaddey, Heidi L.] 55th Med Grp, Offutt AFB, NE 68113 USA.
RP Gaddey, HL (reprint author), Univ Nebraska Med Ctr, Family Med Residency Program, 2501 Capehart Rd, Offutt AFB, NE 68113 USA.
EM heidi.gaddey@us.af.mil
NR 18
TC 0
Z9 0
U1 0
U2 0
PU DOWDEN HEALTH MEDIA
PI MONTVALE
PA 110 SUMMIT AVE, MONTVALE, NJ 07645-1712 USA
SN 0094-3509
J9 J FAM PRACTICE
JI J. Fam. Pract.
PD MAY
PY 2015
VL 64
IS 5
BP 286
EP 291
PG 6
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CI6NI
UT WOS:000354876200008
PM 26009737
ER
PT J
AU Kepley, JM
Bowen, C
Kobayashi, T
AF Kepley, John M.
Bowen, Casey
Kobayashi, Todd
TI Rash and fever in a 14-month-old girl
SO JOURNAL OF FAMILY PRACTICE
LA English
DT Editorial Material
ID URTICARIA
C1 [Kepley, John M.] Edward Via Coll Osteopath Med, Blacksburg, VA USA.
[Bowen, Casey] San Antonio Mil Med Ctr, Joint Base San Antonio, Lackland AFB, TX USA.
RP Bowen, C (reprint author), Dermatol Clin, 2200 Bergquist Dr,STE 1, Lackland AFB, TX 78236 USA.
EM casey.bowen.2@us.af.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU DOWDEN HEALTH MEDIA
PI MONTVALE
PA 110 SUMMIT AVE, MONTVALE, NJ 07645-1712 USA
SN 0094-3509
J9 J FAM PRACTICE
JI J. Fam. Pract.
PD MAY
PY 2015
VL 64
IS 5
BP E1
EP E3
PG 3
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA CI6NI
UT WOS:000354876200001
PM 26009749
ER
PT J
AU Stanfield, SA
Kimmel, RL
Adamczak, D
Juliano, TJ
AF Stanfield, Scott A.
Kimmel, Roger L.
Adamczak, David
Juliano, Thomas J.
TI Boundary-Layer Transition Experiment During Reentry of HIFiRE-1
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID GROUND TEST; CONE
AB The Hypersonic International Flight Research Experimentation program is a hypersonic flight test program. It successfully measured the three-dimensional transition front on a cone at angle of attack in hypersonic flight during its reentry. The test article consisted of a nonablating, 7 deg half-angle, axisymmetric cone with a small bluntness of 2.5mm radius. During transition, angle of attack dropped from 13 to 5 deg and freestream unit Reynolds number increased from 2x10(6) to 8x10(6)/m. Mach number during this time was approximately seven. Earliest transition, determined from fluctuating pressures, occurred on the leeward meridian, at Re-x = 3.1 x 10(6), alpha = 13deg, and M = 7. Attachment line transition occurred at Re-x = 4.7 x 10(6), = 9 deg, and M = 7. The latest transition occurred off the windward meridian at Re-x = 6.0 x 10(6) and phi = 30 and 280 deg. Transition occurred at lower Reynolds numbers than the alpha = 0 deg transition measured during ascent (Re-x = 11 x 10(6) at M = 5.2). The azimuthally averaged transition Reynolds number determined from thermocouples was Re-x = 4.9 x 10(6). Away from the windward meridian, wind-tunnel transition occurred at lower Reynolds numbers than in flight. However, the decrement in transition Reynolds number due to wind-tunnel noise was not as severe as at zero angle of attack. Wind-tunnel windward transition occurred at a higher Reynolds number than in flight. It is posited that the destabilizing effects of wall cooling, which was higher in flight (T-w/T-0 = 0.18) than in ground test (T-w/T-0 = 0.56), outweighed the effect of wind-tunnel noise on the windward transition. High-bandwidth instrumentation recorded periodic pressure fluctuations approximately midway between the windward and leeward meridians before transition. However, they could not be positively identified as a crossflow instability.
C1 [Stanfield, Scott A.] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
[Kimmel, Roger L.; Adamczak, David] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Juliano, Thomas J.] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
RP Stanfield, SA (reprint author), Innovat Sci Solut Inc, 7610 McEwen Rd, Dayton, OH 45459 USA.
RI Juliano, Thomas/A-8153-2015
OI Juliano, Thomas/0000-0002-9362-6007
FU U.S. Air Force Research Laboratory (AFRL); Australian Defence Science
and Technology Organisation (DSTO) [AF-06-0046]
FX The work discussed within this paper was supported by the U.S. Air Force
Research Laboratory (AFRL) and the Australian Defence Science and
Technology Organisation (DSTO), and was carried out under Project
Agreement AF-06-0046. The authors would like to thank the Royal
Australia Navy Ranges and Assessing Unit, Aerospace Operational Support
Group, Royal Australian Air Force, White Sands Missile Range,
DTI/Kratos, and all members of the DSTO Air Vehicles Division Team,
Brisbane. The authors also would like to acknowledge the effort and
support of Douglas Dolvin of AFRL, and John Schmisseur and Rengasamy
Ponnapan of the Air Force Office of Scientific Research. Navier-Stokes
solutions were provided by Andrew Lofthouse of AFRL.
NR 10
TC 1
Z9 1
U1 2
U2 12
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2015
VL 52
IS 3
BP 637
EP 649
DI 10.2514/1.A33197
PG 13
WC Engineering, Aerospace
SC Engineering
GA CI8DC
UT WOS:000354997900001
ER
PT J
AU Juliano, TJ
Adamczak, D
Kimmel, RL
AF Juliano, Thomas J.
Adamczak, David
Kimmel, Roger L.
TI HIFiRE-5 Flight Test Results
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID BOUNDARY-LAYER; TRANSITION
AB The Hypersonic International Flight Research Experimentation (HIFiRE-5) is a hypersonic flight test vehicle designed to investigate the aerothermodynamics of a three-dimensional geometry. It is a 7-deg minor-axis half-angle elliptic cone with a 2:1 aspect ratio and 2.5mm nose radius. The flight test occurred in April2012, but the upper stage of the sounding rocket failed to ignite, resulting in a peak Mach number of about 3 instead of the target of 7. The instrumentation (almost 300 thermocouples and 50 pressure transducers) performed well and provided a wealth of supersonic aeroheating and boundary-layer transition data. The pressure transducers indicated the expected dependence upon angle of attack and yaw and offer a check for the inertial measurement unit. Heat flux was calculated from paired thermocouples and boundary-layer transition locations were identified from the heating rates. Two boundary-layer transition mechanisms were encountered during the supersonic descent. One mode leads to transition over the acreage of the vehicle and correlates well with Re-x; the other mechanism causes the leading-edge boundary-layer transition to advance rapidly over a small range of freestream Re and is suspected to be roughness-induced. The good performance of the instrumentation increases confidence in the success of a repeat flight.
C1 [Juliano, Thomas J.] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
[Adamczak, David; Kimmel, Roger L.] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Juliano, TJ (reprint author), Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
RI Juliano, Thomas/A-8153-2015
OI Juliano, Thomas/0000-0002-9362-6007
FU U.S. Air Force Research Laboratory; Australian Defence Science and
Technology Organisation [AF-06-0046]; Douglas Dolvin, AFRL/RQHV; John
Schmisseur, formerly Air Force Office of Scientific Research and
currently University of Tennessee Space Institute; Rengasamy Ponnappan,
AFOSR/RTA
FX HIFiRE flight 5 was supported by the U.S. Air Force Research Laboratory
and the Australian Defence Science and Technology Organisation and was
carried out under Project Agreement AF-06-0046. Many thanks are extended
to the Andoya Rocket Range of Norway and DLR/Moraba, and all members of
the DSTO AVD Team Brisbane. The authors gratefully acknowledge the
efforts and support of Douglas Dolvin, AFRL/RQHV; John Schmisseur,
formerly Air Force Office of Scientific Research and currently
University of Tennessee Space Institute; and Rengasamy Ponnappan,
AFOSR/RTA. This research was performed while Dr. Juliano held a National
Research Council Research Associateship Award at the U.S. Air Force
Research Laboratory. The authors wish to thank Arnold Engineering
Development Center Tunnel 9 personnel for their assistance with heat
transfer analysis. The UPS solutions cited in this paper were provided
by James Miller, AFRL/RQHV, with additional analysis by Joseph Jewell,
AFRL/RQHF contractor. The AVUS solutions were provided by Joel
Malo-Molina of AFRL/RQHF and Albert Rougeux of AFRL/RQHV. This material
has been cleared for public release. Case Numbers 88ABW-2012-6293 and
2013-5131.
NR 15
TC 2
Z9 2
U1 1
U2 8
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2015
VL 52
IS 3
BP 650
EP 663
DI 10.2514/1.A33142
PG 14
WC Engineering, Aerospace
SC Engineering
GA CI8DC
UT WOS:000354997900002
ER
PT J
AU Borg, MP
Kimmel, RL
Stanfield, S
AF Borg, Matthew P.
Kimmel, Roger L.
Stanfield, Scott
TI Traveling Crossflow Instability for the HIFiRE-5 Elliptic Cone
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID BOUNDARY-LAYER-TRANSITION; LAMINAR-TURBULENT TRANSITION; SECONDARY
INSTABILITY; AERODYNAMIC NOISE; WIND TUNNELS
AB A 38.1%-scale model of the Hypersonic International Flight Research Experimentation Program's Flight Five 2:1 elliptic cone flight vehicle was used to investigate the traveling crossflow instability in a Mach 6 quiet wind tunnel. Traveling crossflow waves were detected with pressure sensors mounted flush with the model surface. The crossflow instability phase speed and wave angle were calculated from the cross spectra of the three pressure sensors. Both quantities showed good agreement with linear stability theory. Duplicate runs at the same initial conditions showed excellent repeatability in traveling crossflow wave properties. Traveling crossflow waves in quiet flow showed very low levels of nonlinear interactions. No traveling crossflow waves were observed for any Reynolds number for elevated freestream noise levels, but transition occurred for a much lower Reynolds number than in quiet flow. Due to the lack of nonlinear growth in quiet flow and the absence of traveling crossflow waves in noisy flow, it appeared that the traveling crossflow instability was not the primary transition mechanism on the model for quiet or noisy flow in this wind tunnel.
C1 [Borg, Matthew P.; Kimmel, Roger L.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Stanfield, Scott] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
RP Borg, MP (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
FU John Schmisseur and Rengasamy Ponnappan of the U.S. Air Force Office of
Scientific Research
FX The authors are grateful to Steven Schneider of Purdue University for
donating time in the Boeing/AFOSR Mach-6 Quiet Tunnel for these
experiments. Steven Schneider's research group was very helpful in
supporting these tests. Thanks are also due to Thomas Juliano for his
assistance, providing valuable insight into the experiments and the
model based on his previous experience, as well as for several fruitful
discussions of the data. Meelan Choudhari, Fei Li, and Chau-Lyan Chang
of NASA Langley Research Center performed the computations. This work
was supported by John Schmisseur and Rengasamy Ponnappan of the U.S. Air
Force Office of Scientific Research. This material has been cleared for
public release. Case Number 88ABW-2015-0480.
NR 18
TC 4
Z9 4
U1 0
U2 7
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2015
VL 52
IS 3
BP 664
EP 673
DI 10.2514/1.A33145
PG 10
WC Engineering, Aerospace
SC Engineering
GA CI8DC
UT WOS:000354997900003
ER
PT J
AU Leigh, AM
Black, JT
AF Leigh, Abraham M.
Black, Jonathan T.
TI Navigation Solution to Maneuver Spacecraft Relative to Spheres Centered
on Cooperative Satellites
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
AB A differential correction algorithm is presented to deliver an impulsive maneuver to a satellite to place it within the overlapping spheres, with user-defined radii, centered around multiple cooperative satellites within a constrained time. The differential correction algorithm develops and utilizes the state transition matrix along with the equations of motion and multiple satellites' state information to determine the optimum trajectory to achieve the desired results. The results from the algorithm are presented for prograde orbits. The results are presented in order to allow for mission design trade-offs, including satellite separation distance and required V based on the satellites' initial inclinations. The results also provide empirical methods to determine the miss distance and optimum V solutions for the provided problem. This work ultimately provides the framework for applying the algorithm to a unique user defined responsive space scenario.
C1 [Leigh, Abraham M.; Black, Jonathan T.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut Engn, Wright Patterson AFB, OH 45433 USA.
RP Leigh, AM (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut Engn, Wright Patterson AFB, OH 45433 USA.
RI Black, Jonathan/R-4875-2016
OI Black, Jonathan/0000-0001-9315-3994
NR 25
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2015
VL 52
IS 3
BP 754
EP 765
DI 10.2514/1.A32910
PG 12
WC Engineering, Aerospace
SC Engineering
GA CI8DC
UT WOS:000354997900011
ER
PT J
AU Bettinger, RA
Black, JT
Agte, JS
AF Bettinger, Robert A.
Black, Jonathan T.
Agte, Jeremy S.
TI Design of Experiment Approach to Atmospheric Skip Entry Maneuver
Optimization
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID AEROASSISTED ORBITAL TRANSFER; COSTATE ESTIMATION; PLANE CHANGE;
EARTH-ORBIT; TRAJECTORIES
AB An optimal trans-atmospheric vehicle and trajectory design are presented to simultaneously maximize the change in inclination angle and minimize total V for an atmospheric skip entry maneuver. As an alternative to contemporary optimization techniques such as pseudospectral methods, a Design of Experiments approach featuring orthogonal arrays of experiments is implemented to solve the multi-objective maneuver optimization problem of atmospheric re-entry. Conducting both Pareto front and main effects analysis, the optimal solution is determined by evaluating the relative performance of six design variables, to include mass, planform area, aerodynamic coefficients, perigee altitude, and bank angle. Depending on the chosen re-circularization altitude, the optimal design performing an out-of-plane skip entry maneuver can achieve an inclination change of 19.91deg with 50-85% less V than a simple plane change.
C1 [Bettinger, Robert A.; Black, Jonathan T.; Agte, Jeremy S.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Bettinger, RA (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RI Black, Jonathan/R-4875-2016
OI Black, Jonathan/0000-0001-9315-3994
NR 39
TC 1
Z9 1
U1 0
U2 11
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2015
VL 52
IS 3
BP 813
EP 826
DI 10.2514/1.A33032
PG 14
WC Engineering, Aerospace
SC Engineering
GA CI8DC
UT WOS:000354997900016
ER
PT J
AU Miao, X
Chabak, K
Zhang, C
Mohseni, PK
Walker, D
Li, XL
AF Miao, Xin
Chabak, Kelson
Zhang, Chen
Mohseni, Parsian K.
Walker, Dennis, Jr.
Li, Xiuling
TI High-Speed Planar GaAs Nanowire Arrays with f(max) > 75 GHz by
Wafer-Scale Bottom-up Growth
SO NANO LETTERS
LA English
DT Article
DE Bottom-up; VLS; nanowire; III-IV; transistor; VLSI
ID FIELD-EFFECT TRANSISTORS; FREQUENCY ELECTRONICS; ALIGNED NANOWIRES;
MOSFETS; PERFORMANCE; GRAPHENE; CHANNEL; CIRCUITS
AB Wafer-scale defect-free planar III-V nanowire (NW) arrays with similar to 100% yield and precisely defined positions are realized via a patterned vaporliquidsolid (VLS) growth method. Long and uniform planar GaAs NWs were assembled in perfectly parallel arrays to form double-channel T-gated NW array-based high electron mobility transistors (HEMTs) with DC and RF performance surpassing those for all field-effect transistors (FETs) with VLS NWs, carbon nanotubes (CNTs), or graphene channels in-plane with the substrate. For a planar GaAs NW array-based HEMT with 150 nm gate length and 2 V drain bias, the on/off ratio (I-ON/I-OFF), cutoff frequency (f(T)), and maximum oscillation frequency (f(max)) are 10(4), 33, and 75 GHz, respectively. By characterizing more than 100 devices on a 1.5 x 1.5 cm(2) chip, we prove chip-level electrical uniformity of the planar NW array-based HEMTs and verify the feasibility of using this bottom-up planar NW technology for post-Si large-scale nanoelectronics.
C1 [Miao, Xin; Chabak, Kelson; Zhang, Chen; Mohseni, Parsian K.; Li, Xiuling] Univ Illinois, Micro & Nanotechnol Lab, Urbana, IL 61801 USA.
[Chabak, Kelson; Walker, Dennis, Jr.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, XL (reprint author), Univ Illinois, Micro & Nanotechnol Lab, 208 N Wright St, Urbana, IL 61801 USA.
EM xiuling@illinois.edu
RI Miao, Xin/C-2332-2017
FU National Science Foundation [ECCS 1001928, DMR 1006581]; Office of Naval
Research [ONR N000141110634]; Air Force Research Laboratory, Sensors
Directorate
FX The authors acknowledge support of this work by National Science
Foundation ECCS 1001928 (X.M., KC., and X.L.) and DMR 1006581 (C.Z. and
X.L.), Office of Naval Research (ONR N000141110634, P.K.M. and X.L.) and
Air Force Research Laboratory, Sensors Directorate (K.C. and D.W.). TEM
characterization and sample preparation via FIB were carried out in part
in the Frederick Seitz Materials Research Laboratory Central Research
Facilities, University of Illinois.
NR 47
TC 12
Z9 12
U1 3
U2 35
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD MAY
PY 2015
VL 15
IS 5
BP 2780
EP 2786
DI 10.1021/nl503596j
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA CI6WX
UT WOS:000354906000003
PM 25494481
ER
PT J
AU De Sio, L
Placido, T
Comparelli, R
Curri, ML
Striccoli, M
Tabiryan, N
Bunning, TJ
AF De Sio, Luciano
Placido, Tiziana
Comparelli, Roberto
Curri, M. Lucia
Striccoli, Marinella
Tabiryan, Nelson
Bunning, Timothy J.
TI Next-generation thermo-plasmonic technologies and plasmonic
nanoparticles in optoelectronics
SO PROGRESS IN QUANTUM ELECTRONICS
LA English
DT Review
DE Plasmonics; Nanomaterials; Soft matter; Nanomedicine; Optoelectronics
ID ENHANCED RAMAN-SCATTERING; SURFACTANT-DIRECTED SYNTHESIS; FUNCTIONALIZED
GOLD NANORODS; SEED-MEDIATED GROWTH; 808-NM DIODE-LASER;
OPTICAL-PROPERTIES; METAL NANOPARTICLES; AU NANOPARTICLES; ASYMMETRIC
FUNCTIONALIZATION; SILVER NANOPARTICLES
AB Controlling light interactions with matter on the nanometer scale provides for compelling opportunities for modem technology and stretches our understanding and exploitation of applied physics, electronics, and fabrication science. The smallest size to which light can be confined using standard optical elements such as lenses and mirrors is limited by diffraction. Plasmonic nanostructures have the extraordinary capability to control light beyond the diffraction limit through an unique phenomenon called the localized plasmon resonance. This remarkable capability enables unique prospects for the design, fabrication and characterization of highly integrated photonic signal-processing systems, nanoresolution optical imaging techniques and nanoscale electronic circuits. This paper summarizes the basic principles and the main achievements in the practical utilization of plasmonic effects in nanoparticles. Specifically, the paper aims at highlighting the major contributions of nanoparticles to nanoscale temperature monitoring, modem "drug free" medicine and the application of nanomaterials to a new generation of opto-electronics integrated circuits. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [De Sio, Luciano; Tabiryan, Nelson] Beam Engn Adv Measurements Co, Winter Pk, FL 32789 USA.
[De Sio, Luciano] Univ Calabria, Dept Phys, Ctr Excellence Study Innovat Funct Mat, I-87036 Arcavacata Di Rende, Italy.
[Placido, Tiziana] Univ Bari, Dip Chim, I-70126 Bari, Italy.
[Placido, Tiziana; Comparelli, Roberto; Curri, M. Lucia; Striccoli, Marinella] CNR, IPCF, Sez Bari, Dip Chim, I-70126 Bari, Italy.
[Bunning, Timothy J.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP De Sio, L (reprint author), Beam Engn Adv Measurements Co, Winter Pk, FL 32789 USA.
EM luciano.desio@fis.unical.it
RI Comparelli, Roberto/C-5449-2009; Curri, Maria Lucia/C-5360-2009;
Striccoli, Marinella/C-5456-2009
OI Comparelli, Roberto/0000-0003-4640-7204; Curri, Maria
Lucia/0000-0002-0261-8379; Striccoli, Marinella/0000-0002-5366-691X
FU Air Force Office of Scientific Research (AFOSR), Air Force Research
Laboratory (AFRL), U.S. Air Force [FA9550-14-1-0050]; Materials and
Manufacturing Directorate, AFRL; Sens&Micro LAB Project (POFESR), PRIN
[P15, 2010C4R8M8, 2012T9XHH7]
FX We acknowledge the cooperation of all co-authors of the papers we
published on the argument: R. Bartolino, C. Umeton (from the University
of Calabria) and co-workers; T. Burgi (from the Universite de Geneve)
and co-workers; A. Agostiano (from University of Bari-Chemistry
Department) and co-workers. The research was supported by the Air Force
Office of Scientific Research (AFOSR), Air Force Research Laboratory
(AFRL) (Grant No. FA9550-14-1-0050), U.S. Air Force, under Grant
FA9550-14-1-0050 (P.I. L. De Sio, EOARD 2014/2015) and the Materials and
Manufacturing Directorate, AFRL; the Sens&Micro (Grant No. P15) LAB
Project (POFESR 2007-2013), PRIN 2010-2011 (Prot. 2010C4R8M8) (Grant No.
2010C4R8M8) and PRIN 2012 (Prot. 2012T9XHH7) (Grant No. 2012T9XHH7).
NR 207
TC 7
Z9 7
U1 9
U2 67
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0079-6727
J9 PROG QUANT ELECTRON
JI Prog. Quantum Electron.
PD MAY
PY 2015
VL 41
BP 23
EP 70
DI 10.1016/j.pquantelec.2015.03.001
PG 48
WC Engineering, Electrical & Electronic
SC Engineering
GA CJ3HO
UT WOS:000355374200002
ER
PT J
AU Iverson, K
Riojas, R
Sharon, D
Hall, AB
AF Iverson, Kyle
Riojas, Ramon
Sharon, Danny
Hall, Andrew B.
TI Objective Comparison of Animal Training Versus Artificial Simulation for
Initial Cricothyroidotomy Training
SO AMERICAN SURGEON
LA English
DT Article
ID SURGICAL SIMULATION; TECHNICAL SKILLS; MODEL
AB This manuscript aims to determine if there is a difference in performance outcomes after initial training with either animals or simulators. Volunteers without prior experience performing emergency procedures were randomly assigned to receive training in cricothyroidotomy on either a pig model or on an artificial simulator. Volunteers were given identical lectures and trained to proficiency. Two weeks after training, trainees were tested using human cadavers as to their performance with time, incision size, incision start location, initial placement attempt, and final accuracy. Overall success rate of the animal-trained group was 64 per cent and in the artificial simulator group, 73 per cent (P = 0.431). Median time to completion in the animal group and artificial simulator group was 143 s and 105 s (P = 0.482), and incision lengths 4.0 cm and 3.2 cm (P = 0.173), respectively. Accuracy of initially attempted incision placement and final cricothyroidotomy tube placement was also compared. Initially attempted site accuracy in the animal-trained group was 93 per cent and correct final position 79 per cent, and in the artificial group, 100 per cent (P = 0.452) and 88 per cent (P = 0.782), respectively. There was no statistically significant, objective difference in any metric between animal-and simulator-trained groups after cricothyroidotomy training. For initial training, there is no objective benefit of animal training.
C1 [Iverson, Kyle; Riojas, Ramon; Hall, Andrew B.] Keesler Med Ctr, Keesler AFB, MS 39534 USA.
[Sharon, Danny] Air Force Med Support Agcy, Joint Base San Antonio L, TX USA.
RP Hall, AB (reprint author), Keesler Med Ctr, 301 Fisher St, Keesler AFB, MS 39534 USA.
EM andrew.hall.2@us.af.mil
NR 11
TC 1
Z9 1
U1 0
U2 0
PU SOUTHEASTERN SURGICAL CONGRESS
PI CUMMING
PA 115 SAMARITAN DR, #200, CUMMING, GA 30040-2354 USA
SN 0003-1348
EI 1555-9823
J9 AM SURGEON
JI Am. Surg.
PD MAY
PY 2015
VL 81
IS 5
BP 515
EP 518
PG 4
WC Surgery
SC Surgery
GA CI6TS
UT WOS:000354895700035
PM 25975338
ER
PT J
AU Yun, Y
Zhai, XF
Ma, C
Huang, HL
Meng, DC
Cui, ZZ
Wang, JL
Fu, ZP
Peng, RR
Brown, GJ
Lu, YL
AF Yun, Yu
Zhai, Xiaofang
Ma, Chao
Huang, Haoliang
Meng, Dechao
Cui, Zhangzhang
Wang, Jianlin
Fu, Zhengping
Peng, Ranran
Brown, Gail J.
Lu, Yalin
TI Growth of single-crystalline Bi6FeCoTi3O18 thin films and their
magnetic-ferroelectric properties
SO APPLIED PHYSICS EXPRESS
LA English
DT Article
ID MULTIFERROIC PROPERTIES; STRUCTURAL STABILITY; ROOM-TEMPERATURE; SYSTEM;
BI4TI3O12-BIFEO3; NANOSTRUCTURES; CERAMICS; BIFEO3; OXIDES
AB High-quality single-crystalline thin films of n = 5 (n denotes the period of the Aurivillius structure) multiferroic Aurivillius oxides were obtained by determining and applying an optimal growth temperature of 605 degrees C and oxygen pressure of 20 Pa using pulsed laser deposition. The optimal growth ranges were narrower than 30 degrees C for the temperature and 10 Pa for the pressure. The optimized thin films exhibited obvious ferroelectric polarization switching in the out-of-plane direction as well as weak ferromagnetism with a saturation magnetization of less than 10 emu/cm(3). (C) 2015 The Japan Society of Applied Physics
C1 [Yun, Yu; Zhai, Xiaofang; Ma, Chao; Huang, Haoliang; Meng, Dechao; Cui, Zhangzhang; Wang, Jianlin; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
[Yun, Yu; Huang, Haoliang; Meng, Dechao; Cui, Zhangzhang; Wang, Jianlin; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
[Zhai, Xiaofang; Huang, Haoliang; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China.
[Zhai, Xiaofang] CAS Hefei Inst Phys Sci, Hefei Phys Sci & Technol Ctr, Hefei 230031, Peoples R China.
[Lu, Yalin] US Air Force Acad, Dept Phys, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China.
[Brown, Gail J.] AFRL RXPSO, Wright Patterson AFB, OH 45433 USA.
RP Zhai, XF (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
EM xfzhai@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010; Ma, Chao/J-4569-2015
FU National Basic Research Program of China [2012CB922001]; Chinese Academy
of Sciences [KGZD-EW-T06]; US Air Force Office of Scientific of Research
(AFOSR); DTRA [122221]
FX This work was supported by the National Basic Research Program of China
(2012CB922001) and the Chinese Academy of Sciences (KGZD-EW-T06). The
authors thank USTC Center for Micro- and Nanoscale Research and
Fabrication for providing assistance on PFM measurement and especially
for the support from Jinlan Peng. Y. L. Lu thanks the US Air Force
Office of Scientific of Research (AFOSR) and DTRA (122221).
NR 29
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Z9 4
U1 5
U2 64
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1882-0778
EI 1882-0786
J9 APPL PHYS EXPRESS
JI Appl. Phys. Express
PD MAY
PY 2015
VL 8
IS 5
AR 054001
DI 10.7567/APEX.8.054001
PG 4
WC Physics, Applied
SC Physics
GA CI7RV
UT WOS:000354963000021
ER
PT J
AU Adorno-Rodriguez, R
Palazotto, AN
AF Adorno-Rodriguez, Ruben
Palazotto, Anthony N.
TI Nonlinear Structural Analysis of an Icosahedron Under an Internal Vacuum
SO JOURNAL OF AIRCRAFT
LA English
DT Article
AB The concept that a structure is capable of producing buoyancy using an internal vacuum rather than a gas dates back to the 1600s, but material technology has restricted the construction of such concepts for common geometries, such as the sphere. Different and often complex geometries compensate for the lack of light materials that provide the stiffness and strength needed. Therefore, this research looks at a lighter-than-air vehicle in the form of an icosahedral frame/skin configuration using nonlinear finite element analysis in order to determine the structural response of such a vehicle, its capacity to sustain a vacuum with both material technology that exists today and in the near future, and its buoyancy characteristics. The structural response is characterized with large displacements, where membrane behavior dominates the icosahedral skin response, generating geometric stiffening in the overall structure. It is shown that those displacements have minimal effect in the structure's buoyancy, with no more than 4% reduction. Overall, the nonlinear analysis of the icosahedral structure provided tangible background on its behavior and the lighter-than-air vehicle applicability. It is feasibly possible to actually manufacture this type of vehicle in the very near future, depending upon newer materials with more advanced strength.
C1 [Adorno-Rodriguez, Ruben; Palazotto, Anthony N.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Adorno-Rodriguez, R (reprint author), US Air Force, Edwards AFB, CA 93524 USA.
FU Air Force Office of Scientific Research
FX The authors would like to thank David Stargel of Air Force Office of
Scientific Research for his financial support and encouragement. The
views expressed in this work are those of the authors and do not reflect
the official policy or position of the U S. Air Force, the U.S.
Department of Defense, or the U.S. Government.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2015
VL 52
IS 3
BP 878
EP 883
DI 10.2514/1.C033284
PG 6
WC Engineering, Aerospace
SC Engineering
GA CI4VH
UT WOS:000354751400014
ER
PT J
AU Gajewicz, A
Schaeublin, N
Rasulev, B
Hussain, S
Leszczynska, D
Puzyn, T
Leszczynski, J
AF Gajewicz, Agnieszka
Schaeublin, Nicole
Rasulev, Bakhtiyor
Hussain, Saber
Leszczynska, Danuta
Puzyn, Tomasz
Leszczynski, Jerzy
TI Towards understanding mechanisms governing cytotoxicity of metal oxides
nanoparticles: Hints from nano-QSAR studies
SO NANOTOXICOLOGY
LA English
DT Article
DE HaCaT; nano-metal oxides; nano-QSAR; nanoparticles; toxicity
ID OXIDATIVE STRESS; PULMONARY TOXICITY; CARBON NANOTUBES; NDDO
APPROXIMATIONS; RISK-ASSESSMENT; PROTEIN CORONA; BAND-GAP; SIZE;
NANOMATERIALS; AGGREGATION
AB The production of nanomaterials increases every year exponentially and therefore the probability these novel materials that they could cause adverse outcomes for human health and the environment also expands rapidly. We proposed two types of mechanisms of toxic action that are collectively applied in a nano-QSAR model, which provides governance over the toxicity of metal oxide nanoparticles to the human keratinocyte cell line (HaCaT). The combined experimental-theoretical studies allowed the development of an interpretative nano-QSAR model describing the toxicity of 18 nano-metal oxides to the HaCaT cell line, which is a common in vitro model for keratinocyte response during toxic dermal exposure. The comparison of the toxicity of metal oxide nanoparticles to bacteria Escherichia coli (prokaryotic system) and a human keratinocyte cell line (eukaryotic system), resulted in the hypothesis that different modes of toxic action occur between prokaryotic and eukaryotic systems.
C1 [Gajewicz, Agnieszka; Puzyn, Tomasz] Univ Gdansk, Lab Environm Chemometr, Inst Environm & Human Hlth Protect, Fac Chem, PL-80952 Gdansk, Poland.
[Schaeublin, Nicole; Hussain, Saber] Air Force Res Lab, Biol Interact Nanomat, Human Effectiveness Directorate 711, Appl Biotechnol Branch,Human Performance Wing, Wright Patterson AFB, OH USA.
[Rasulev, Bakhtiyor; Leszczynski, Jerzy] Jackson State Univ, Dept Chem & Biochem, Jackson, MS 39217 USA.
[Leszczynska, Danuta] Jackson State Univ, Dept Civil & Environm Engn, Interdisciplinary Nanotoxicity Ctr, Jackson, MS 39217 USA.
RP Leszczynski, J (reprint author), Jackson State Univ, Dept Chem & Biochem, 1400 Lynch St, Jackson, MS 39217 USA.
EM jerzy@icnanotox.org
OI Puzyn, Tomasz/0000-0003-0449-8339; Rasulev,
Bakhtiyor/0000-0002-7845-4884
FU 711 HPW/RHD [FA8650-10-2-6062]; NSF CREST Interdisciplinary Nanotoxicity
Center NSF-CREST [HRD-0833178]; NSF-EPSCoR Award
[362492-190200-01\NSFEPS-0903787]; Polish National Science Center
[UMO-2011/01/M/NZ7/01445]
FX This material is based on research sponsored by 711 HPW/RHD under
agreement number FA8650-10-2-6062. The U.S. Government is authorized to
reproduce and distribute reprints for Governmental purposes
notwithstanding any copyright notation thereon. The views and
conclusions contained herein are those of the authors and should not be
interpreted as necessarily representing the official policies or
endorsements, either expressed or implied, of 711 HPW/RHD or the U.S.
Government. The authors thank for support of the NSF CREST
Interdisciplinary Nanotoxicity Center NSF-CREST - Grant #HRD-0833178 and
NSF-EPSCoR Award #: 362492-190200-01\NSFEPS-0903787. This work was
supported by the Polish National Science Center (grant no.
UMO-2011/01/M/NZ7/01445). The authors would also like to thank Ms.
Elizabeth Maurer for all of her work on the characterization of the
nanomaterials.
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PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1743-5390
EI 1743-5404
J9 NANOTOXICOLOGY
JI Nanotoxicology
PD MAY
PY 2015
VL 9
IS 3
BP 313
EP 325
DI 10.3109/17435390.2014.930195
PG 13
WC Nanoscience & Nanotechnology; Toxicology
SC Science & Technology - Other Topics; Toxicology
GA CI7WI
UT WOS:000354975400005
PM 24983896
ER
PT J
AU Howard, DL
Soulli, B
Johnson, N
Cooper, S
AF Howard, David Leighton
Soulli, Beth
Johnson, Nicole
Cooper, Saladin
TI Women's Understanding of the Term "Pap Smear": A Comparison of
Spanish-Speaking and English-Speaking Women
SO OBSTETRICS AND GYNECOLOGY
LA English
DT Meeting Abstract
CT 61st Annual Clinical Meeting of the
American-College-of-Obstetricians-and-Gynecologists - Women's Health
Care Physicians
CY MAY 07, 2013
CL New Orleans, LA
SP Amer Coll Obstetricians & Gynecologists
C1 [Howard, David Leighton] US Air Force, Joint Base Langley Eustis, Hampton, VA USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0029-7844
J9 OBSTET GYNECOL
JI Obstet. Gynecol.
PD MAY
PY 2015
VL 125
SU 1
MA 8
BP 3S
EP 3S
PG 1
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA CH6EI
UT WOS:000354128700009
ER
PT J
AU Franzi, MA
Greening, GB
Jordan, NM
Gilgenbach, RM
Simon, DH
Lau, YY
Hoff, BW
Luginsland, J
AF Franzi, Matthew A.
Greening, Geoffrey B.
Jordan, Nicholas M.
Gilgenbach, Ronald M.
Simon, David H.
Lau, Y. Y.
Hoff, Brad W.
Luginsland, John
TI Microwave Power and Phase Measurements on a Recirculating Planar
Magnetron
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Cavity magnetron; frequency locking; high-power microwaves (HPMs);
recirculating planar magnetron (RPM); vacuum electronics
ID E-BEAM ACCELERATOR; RELATIVISTIC MAGNETRON; SIMULATIONS; OPERATION;
DRIVEN
AB Calibrated microwave power and phase measurements are presented for the first recirculating planar magnetron prototype consisting of two coupled six-cavity 1-GHz planar cavity arrays. The results are presented for a solid cathode and two mode-control cathodes (MCCs) with aluminum or velvet electron emitters. The measurements were conducted using a prototype coaxial microwave power extraction scheme. The experimental operating parameters included: pulsed cathode voltages between -250 and -300 kV, voltage pulselengths of 200-600 mu s, axial magnetic fields of 0.1-0.32 T, and entrance currents of 1-10 kA. The results showed improved oscillator frequency locking for the MCCs and increases in power and efficiency using the velvet electron emitter.
C1 [Franzi, Matthew A.; Greening, Geoffrey B.; Jordan, Nicholas M.; Gilgenbach, Ronald M.; Simon, David H.; Lau, Y. Y.] Univ Michigan, Plasma Pulsed Power & Microwave Lab, Ann Arbor, MI 48109 USA.
[Hoff, Brad W.] Air Force Res Lab, Kirtland Air Force Base, Albuquerque, NM 87117 USA.
[Luginsland, John] Air Force Off Sci Res, Arlington, VA 22203 USA.
RP Franzi, MA (reprint author), SLAC Natl Accelerator Lab, Electrodynam, Menlo Pk, CA 94025 USA.
EM mfronz@umich.edu; geofgree@umich.edu; jordann@umich.edu;
rongilg@umich.edu; dhsimon@umich.edu; yylau@umich.edu;
brad.hoff@kirtland.af.mil; john.luginsland@afosr.af.mil
RI Simon, David/L-8446-2016
OI Simon, David/0000-0001-8666-995X
FU Air Force Office of Scientific Research [FA9550-10-1-0104]; Air Force
Research Laboratory; L-3 Communications Electron Devices
FX This work was supported in part by the Air Force Office of Scientific
Research under Grant FA9550-10-1-0104, in part by the Air Force Research
Laboratory, and in part by the L-3 Communications Electron Devices.
NR 27
TC 4
Z9 4
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD MAY
PY 2015
VL 43
IS 5
BP 1675
EP 1682
DI 10.1109/TPS.2015.2417774
PN 2
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA CH9RT
UT WOS:000354374600003
ER
PT J
AU Dharamsi, FM
Michener, MD
Dharamsi, JW
AF Dharamsi, Farid M.
Michener, Michael D.
Dharamsi, Jennifer Warner
TI BULLOUS FIXED DRUG ERUPTION MASQUERADING AS RECURRENT STEVENS JOHNSON
SYNDROME
SO JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
DE drug eruption; drug rash; fixed drug eruption; Stevens Johnson syndrome;
toxic epidermal necrolysis
ID TOXIC EPIDERMAL NECROLYSIS
AB Background: Fixed drug eruptions (FDE) are peculiar drug rashes that tend to be violaceous, hyperpigmented, and round to oval-shaped plaques with dusky gray centers. The lesions tend to recur in a similar dermatologic distribution upon re-exposure to the offending medication, leading to intensified inflammation and sometimes the formation of blisters, bullae, and erosions. This bullous form of FDE can be mistaken clinically for Stevens Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN). Case Report: We report two cases of patients presenting to the emergency department (ED) with characteristic blistering skin lesions and reports of similar prior episodes; both patients were initially diagnosed in the ED as "recurrent SJS" and admitted to the burn intensive care unit. Each patient was evaluated emergently by dermatology consultants, identified as cases of FDE rather than SJS, and transferred to the general medical ward with an uncomplicated hospital course and complete re-epithelialization within 7 days after removal of the inciting agent. Why Should an Emergency Physician Be Aware of This?: We discuss distinguishing features of bullous FDE and SJS/TEN in order to highlight this entity and aid in diagnostic accuracy and appropriate management by emergency physicians. In cases identified as classic or suspected SJS/TEN, the patient warrants aggressive resuscitation and admission to a burn unit, while cases identified as obvious bullous FDE can be managed much more conservatively. Although the clinical clues outlined here may help distinguish classic cases of FDE from SJS/TEN, it is always advisable to admit to a higher level of care or obtain an urgent dermatology consult when diagnostic uncertainty remains. Published by Elsevier Inc.
C1 [Dharamsi, Farid M.] Univ Texas Southwestern, Dept Emergency Med, Dallas, TX USA.
[Michener, Michael D.] US Air Force, Elmendorf Air Force Base, Anchorage, AK USA.
[Dharamsi, Jennifer Warner] Univ Texas Southwestern, Dept Dermatol, Dallas, TX USA.
RP Dharamsi, JW (reprint author), Univ Texas Southwestern, Dept Dermatol, 1360 Deer Lake Dr, Frisco, TX 75034 USA.
NR 8
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0736-4679
EI 1090-1280
J9 J EMERG MED
JI J. Emerg. Med.
PD MAY
PY 2015
VL 48
IS 5
BP 551
EP 554
DI 10.1016/j.jemermed.2014.09.049
PG 4
WC Emergency Medicine
SC Emergency Medicine
GA CH4VB
UT WOS:000354030200008
PM 25433836
ER
PT J
AU Mah, TI
Keller, KA
Kerans, RJ
Cinibulk, MK
AF Mah, Tai-Il
Keller, Kristin A.
Kerans, Ronald J.
Cinibulk, Michael K.
TI Reduced Cracking in Oxide Fiber-Reinforced Oxide Composites via Freeze-
Dry Processing
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID CERAMIC-MATRIX COMPOSITES; YTTRIUM-ALUMINUM-GARNET; CASTING TECHNIQUE;
SOLIDIFICATION; CHANNELS
AB Porous oxide matrix composites typically develop significant numbers of matrix cracks during processing. Eliminating such cracks will lead to improved matrix-dominated properties and will also provide a significant step toward producing a dense oxide matrix composite. However, attaining a crack-free oxide matrix composite has been elusive due to the large shrinkages of the matrix in drying and sintering in the presence of the constraints to macro shrinkage imposed by fiber reinforcement, and to direct effects of drying. By utilizing a camphene based freeze-drying process combined with a nonshrinking matrix, the shrinkage cracks in an oxide fiber-reinforced composite can be essentially eliminated. This concept was validated for 2D fabric-reinforced composites.
C1 [Mah, Tai-Il; Keller, Kristin A.; Kerans, Ronald J.; Cinibulk, Michael K.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Mah, Tai-Il; Keller, Kristin A.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
RP Keller, KA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM kristin.keller.1.ctr@us.af.mil
NR 28
TC 0
Z9 0
U1 4
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAY
PY 2015
VL 98
IS 5
BP 1437
EP 1443
DI 10.1111/jace.13500
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA CH2TK
UT WOS:000353877300009
ER
PT J
AU Wang, JL
Li, L
Peng, RR
Fu, ZP
Liu, M
Lu, YL
AF Wang, Jianlin
Li, Lin
Peng, Ranran
Fu, Zhengping
Liu, Min
Lu, Yalin
TI Structural Evolution and Multiferroics in Sr-Doped Bi7Fe1.5Co1.5Ti3O21
Ceramics
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID MOLTEN-SALT SYNTHESIS; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE;
MAGNETOELECTRIC MEASUREMENTS; AURIVILLIUS PHASES; SOLID-SOLUTIONS;
OXYGEN VACANCY; FERROELECTRICS; FERROMAGNETISM; NANOPARTICLES
AB The ceramics with the composition of Sr(x)Bi(7-x)Fe(1.5)Co(1.)5 Ti3O21-delta (0 <= x <= 1, SBFCT) were prepared by a citrate-nitrate combustion method, and the phase evolution with an increasing Sr content was investigated. Pure Aurivillius phase SBFCT with a layer number of n = 6 was obtained when x <= 0.25, and then the structure collapsed to 5 layers for x = 0.50, then alternating 4 and 5 layers for x = 0.75, and finally 4 layers for x = 1.00. Meanwhile, secondary phase Sr(1-m)BimFe(1-i)Co(i)O(3-gamma) appeared when x > 0.25, which is antiferromagnetic (AFM) and with low resistivity. Enhanced ferromagnetic and ferroelectric properties were observed from single phase SBFCTs at the room temperature, and the ferromagnetic transition temperature (T-c) increases with the Sr doping level x in the single phase range. The remnant magnetization (2M(r)) is 2.27 emu/g and the remnant polarization (2P(r)) is 2.89 mu C/cm(2) at an applied electric field of 100 kV/cm for the x = 0.25 sample.
C1 [Wang, Jianlin; Li, Lin; Peng, Ranran; Fu, Zhengping; Liu, Min; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Peng, Ranran; Fu, Zhengping; Liu, Min; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Dept Phys, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Liu, M (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
EM liumin1106@ustc.edu.cn; yalin.lu@usafa.edu
RI Peng, Ranran/F-5934-2010
FU National Basic Research Program of China (973 Program) [2012CB922001];
Natural Science Foundation of China [51102224]; Anhui Provincial Natural
Science Foundation [1408085QE84]; Fundamental Research Fund for the
Central Universities [WK 2060140014]; AFOSR; DTRA [HDTRA12221]
FX This work was supported by the National Basic Research Program of China
(973 Program, 2012CB922001), the Natural Science Foundation of China
(51102224), Anhui Provincial Natural Science Foundation (1408085QE84),
and the Fundamental Research Fund for the Central Universities (WK
2060140014). Dr Lu appreciates the support from AFOSR and DTRA
(HDTRA12221).
NR 39
TC 8
Z9 8
U1 9
U2 48
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAY
PY 2015
VL 98
IS 5
BP 1528
EP 1535
DI 10.1111/jace.13495
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA CH2TK
UT WOS:000353877300022
ER
PT J
AU Tsang, L
Ding, KH
Li, XD
Duvelle, PN
Vella, JH
Goldsmith, J
Devlin, CLH
Limberopoulos, NI
AF Tsang, Leung
Ding, Kung-Hau
Li, Xudong
Duvelle, Philippe N.
Vella, Jarrett H.
Goldsmith, John
Devlin, Christie L. H.
Limberopoulos, Nicholaos I.
TI Studies of the influence of deep subwavelength surface roughness on
fields of plasmonic thin film based on Lippmann-Schwinger equation in
the spectral domain
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID ENHANCEMENT; SUPERLENSES; LENS
AB In this paper, we consider a line source over a plasmonic thin film with surface roughness. Using layered medium Green's functions, we derive the Lippmann-Schwinger equation in the spectral domain with scattering potentials for the case of surface roughness over a layered medium. Because of deep subwavelength surface roughness, the scattering potentials are next approximated by the small potential approximation, so that the solutions of fields in the spectral domain can be readily computed. Numerical results are illustrated for the surface fields on the rough surface and the fields in the image plane. For periodic roughness, small periods, on the order of 0.1 lambda, and small heights, on the order of 0.01 lambda, are used. For the case of random roughness, we choose the correlation length to be much smaller than a wavelength, on the order of 0.1 lambda, and height on the order of 0.01 lambda. The results of the fields on the rough surface in the spectral domain show that subwavelength roughness creates fields with wave vector components that are many times larger than the free-space wavenumber (similar to 10k(0) or larger). In the spatial domain, the imaging is enhanced by the deep subwavelength roughness. Results of the small roughness approximation are in good agreement with that of exact potential and that of the method of moments. (C) 2015 Optical Society of America
C1 [Tsang, Leung; Li, Xudong] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA.
[Ding, Kung-Hau; Duvelle, Philippe N.; Vella, Jarrett H.; Goldsmith, John; Devlin, Christie L. H.; Limberopoulos, Nicholaos I.] Air Force Res Lab, Sensor Directorate, Wright Patterson AFB, OH 45433 USA.
[Vella, Jarrett H.; Goldsmith, John] Wyle, Dayton, OH 45433 USA.
[Devlin, Christie L. H.] Adatom Sci, Dayton, OH 45433 USA.
RP Tsang, L (reprint author), Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48103 USA.
EM leungwtsang@gmail.com
NR 17
TC 0
Z9 0
U1 2
U2 4
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD MAY
PY 2015
VL 32
IS 5
BP 878
EP 891
DI 10.1364/JOSAB.32.000878
PG 14
WC Optics
SC Optics
GA CH3JD
UT WOS:000353926100030
ER
PT J
AU Durkin, T
AF Durkin, Tom
TI Symbolic Interaction, Public Policy, the Really Really Other, and Human
Terrain System Training
SO SYMBOLIC INTERACTION
LA English
DT Article
DE interaction; training; human terrain; social order
AB I discuss the relevance of symbolic interaction to a misunderstood public policy program, the Human Terrain System.
C1 [Durkin, Tom] Univ Florida, Gainesville, FL 32611 USA.
RP Durkin, T (reprint author), 1919 Bay Blve C-26 Seaside Hts, McGuire Afb, NJ 08751 USA.
EM tom.durkin@gmail.com
NR 15
TC 1
Z9 1
U1 1
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0195-6086
EI 1533-8665
J9 SYMB INTERACT
JI Symb. Interact.
PD MAY
PY 2015
VL 38
IS 2
BP 298
EP 304
DI 10.1002/symb.154
PG 7
WC Sociology
SC Sociology
GA CH4UZ
UT WOS:000354029900007
ER
PT J
AU Kyle, BG
AF Kyle, Brent G.
TI The New and Old Ignorance Puzzles: How badly do we need closure?
SO SYNTHESE
LA English
DT Article
DE Ignorance; Knowledge; Closure; Skepticism; Implicature; Abominable
conjunctions; Contextualism; Ambiguity theory of knowledge; Negative
strengthening; Conditional perfection
ID CONTEXTUALISM; SKEPTICISM
AB Skeptical puzzles and arguments often employ knowledge-closure principles (e.g. If S knows that P, and knows that P entails Q, then S knows that Q). Epistemologists widely believe that an adequate reply to the skeptic should explain why her reasoning is appealing albeit misleading; but it's unclear what would explain the appeal of the skeptic's closure principle, if not for its truth. In this paper, I aim to challenge the widespread commitment to knowledge-closure. But I proceed by first examining a new puzzle about failing to know-what I call the New Ignorance Puzzle (Sects. 1-3). This puzzle resembles to the Old Ignorance Puzzle (i.e. the closure-based skeptical puzzle), although it does not involve a closure principle. It instead centers on the standard view of ignorance, a highly intuitive principle stating that ignorance is merely a failure to know. In Sects. 2 and 3, I argue that the best way to solve the New Ignorance Puzzle is to reject the standard view of ignorance and to explain away its appeal via conversational implicature. I then use this solution to the New Ignorance Puzzle as a way of explaining why knowledge-closure principles would seem true, and why abominable conjunctions would seem abominable, even if such principles were false (Sect. 4). The upshot is a new way of explaining why the skeptic's reasoning is appealing albeit misleading.
C1 US Air Force Acad, Dept Philosophy, HQ USAFA DFPY, Colorado Springs, CO 80840 USA.
RP Kyle, BG (reprint author), US Air Force Acad, Dept Philosophy, HQ USAFA DFPY, 2354 Fairchild Dr,Suite 1A29, Colorado Springs, CO 80840 USA.
EM bgk5@cornell.edu
NR 55
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0039-7857
EI 1573-0964
J9 SYNTHESE
JI Synthese
PD MAY
PY 2015
VL 192
IS 5
BP 1495
EP 1525
DI 10.1007/s11229-014-0642-8
PG 31
WC History & Philosophy Of Science; Philosophy
SC History & Philosophy of Science; Philosophy
GA CH9VU
UT WOS:000354385300012
ER
PT J
AU Prater, A
Shen, LX
AF Prater, Ashley
Shen, Lixin
TI Separation of undersampled composite signals using the Dantzig selector
with overcomplete dictionaries
SO IET SIGNAL PROCESSING
LA English
DT Article
ID STATISTICAL ESTIMATION; LARGER; RECOVERY; LASSO
AB In many applications, one may acquire a composition of several signals that may be corrupted by noise, and it is a challenging problem to reliably separate the components from one another without sacrificing significant details. Adding to the challenge, in a compressive sensing framework, one is given only an undersampled set of linear projections of the composite signal. In this study, the authors propose using the Dantzig selector model incorporating an overcomplete dictionary to separate a noisy undersampled collection of composite signals, and present an algorithm to efficiently solve the model. The Dantzig selector is a statistical approach to finding a solution to a noisy linear regression problem by minimising the l(1) norm of candidate coefficient vectors while constraining the scope of the residuals. The Dantzig selector performs well in the recovery and separation of an unknown composite signal when the underlying coefficient vector is sparse. They propose a proximity operator-based algorithm to recover and separate unknown noisy undersampled composite signals using the Dantzig selector. They present numerical simulations comparing the proposed algorithm with the competing alternating direction method, and the proposed algorithm is found to be faster, while producing similar quality results. In addition, they demonstrate the utility of the proposed algorithm by applying it in various applications including the recovery of complex-valued coefficient vectors, the removal of impulse noise from smooth signals, and the separation and classification of a composition of handwritten digits.
C1 [Prater, Ashley] Air Force Res Lab, High Performance Syst Branch, Rome, NY 13441 USA.
[Shen, Lixin] Syracuse Univ, Dept Math, Syracuse, NY 13244 USA.
RP Prater, A (reprint author), Air Force Res Lab, High Performance Syst Branch, 525 Brooks Rd, Rome, NY 13441 USA.
EM ashley.prater.3@us.af.mil
FU National Research Council via the Air Force Office of Scientific
Research; US National Science Foundation [DMS-1115523]
FX Cleared for public release by WPAFB Public Affairs on 30 Jan 14. Case
Number: 88ABW-2014-0297. This research is supported in part by an award
from the National Research Council via the Air Force Office of
Scientific Research and by the US National Science Foundation under
grant DMS-1115523.
NR 25
TC 0
Z9 0
U1 1
U2 3
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1751-9675
EI 1751-9683
J9 IET SIGNAL PROCESS
JI IET Signal Process.
PD MAY
PY 2015
VL 9
IS 3
BP 226
EP 234
DI 10.1049/iet-spr.2014.0048
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA CH4YU
UT WOS:000354041200005
ER
PT J
AU Cobb, BR
Johnson, AW
Rumi, R
Salmeron, A
AF Cobb, Barry R.
Johnson, Alan W.
Rumi, Rafael
Salmeron, Antonio
TI Accurate lead time demand modeling and optimal inventory policies in
continuous review systems
SO INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS
LA English
DT Article
DE Continuous review; Lead time demand; Inventory control; Mixture of
polynomials; Mixtures of truncated exponentials; Uncertainty
ID HYBRID BAYESIAN NETWORKS; SUPPLY CHAIN COORDINATION; REORDER POINT;
COMPLICATED DISTRIBUTIONS; TRUNCATED EXPONENTIALS; NORMAL APPROXIMATION;
LEARNING MIXTURES; ORDER QUANTITY; SAFETY STOCK; POLYNOMIALS
AB To construct an accurate probability density function for lead time demand in inventory management models, a mixture of polynomials (MOPs) distributions is estimated using B-spline functions from empirical data on demand per unit time. This is accomplished by summarizing the empirical observations into separate datasets for each lead time value. A mixture distribution approach is then applied to model lead time demand in a continuous review inventory system. Inventoiy policies can be determined without knowledge of the underlying demand and/or lead time distributions. An improvement to a mixture distribution approach that models the lead time demand distribution with a mixture of truncated exponentials (MTEs) distribution is also presented, and the MOP and MTE techniques are compared. Both methods provide reasonable accuracy, but the MOP approach requires lower computational time to determine optimal inventory policies. The mixture distribution approach is also compared with solutions calculated using optimization through simulation and by compiling a discrete, empirical lead time demand distribution. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Cobb, Barry R.] Missouri State Univ, Dept Management, Springfield, MO 65897 USA.
[Johnson, Alan W.] US Air Force, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
[Rumi, Rafael; Salmeron, Antonio] Univ Almeria, Dept Math, La Canada De San Urbano 04120, Almeria, Spain.
RP Cobb, BR (reprint author), Missouri State Univ, Dept Management, Springfield, MO 65897 USA.
EM BarryCobb@MissouriState.edu; Alan.Johnson@afit.edu; rrumi@ual.es;
antonio.salmeron@ual.es
RI Salmeron, Antonio/K-3307-2015; Rumi, Rafael/G-2209-2016
OI Salmeron, Antonio/0000-0003-4982-8725; Rumi, Rafael/0000-0001-9189-5468
FU Office of the Secretary of Defense through the Acquisition Research
Program at the Naval Postgraduate School [N00244-13-1-0014]; Spanish
Ministry of Economy and Competitiveness [TIN2013-46638-C3-1-P]; ERDF
(FEDER) funds
FX We thank two anonymous referees for their valuable comments and
suggestions which improved the paper, and Greg Hartman for helpful
comments and discussion. Support from grant N00244-13-1-0014 from the
Office of the Secretary of Defense through the Acquisition Research
Program at the Naval Postgraduate School is gratefully acknowledged. The
views expressed in written materials or publications, and/or made by
speakers, moderators, and presenters, do not necessarily reflect the
official policies of the Naval Postgraduate School nor does mention of
trade names, commercial practices, or organizations imply endorsement by
the U.S. Government. This work has also been supported by the Spanish
Ministry of Economy and Competitiveness, grant TIN2013-46638-C3-1-P and
by ERDF (FEDER) funds.
NR 69
TC 1
Z9 1
U1 5
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0925-5273
EI 1873-7579
J9 INT J PROD ECON
JI Int. J. Prod. Econ.
PD MAY
PY 2015
VL 163
BP 124
EP 136
DI 10.1016/j.ijpe.2015.02.017
PG 13
WC Engineering, Industrial; Engineering, Manufacturing; Operations Research
& Management Science
SC Engineering; Operations Research & Management Science
GA CH0UB
UT WOS:000353736800010
ER
PT J
AU Rasmussen, A
Brown, M
Earley, K
Hefner, K
Radfar, L
Lewis, D
Young, S
Kaufman, CE
Segal, B
Lessard, CJ
Montgomery, C
Scofield, RH
Stone, D
Sivils, KL
AF Rasmussen, A.
Brown, M.
Earley, K.
Hefner, K.
Radfar, L.
Lewis, D.
Young, S.
Kaufman, C. E.
Segal, B.
Lessard, C. J.
Montgomery, C.
Scofield, R. H.
Stone, D.
Sivils, K. L.
TI Performance of the Ocular Staining Score (OSS) vs. the van Bijsterveld
Score in the Assessment of Sjogren's Syndrome-Related
Keratoconjunctivitis Sicca
SO SCANDINAVIAN JOURNAL OF IMMUNOLOGY
LA English
DT Meeting Abstract
CT 13th International Symposium on Sjogren's Syndrome
CY MAY 19-22, 2015
CL Bergen, NORWAY
C1 [Rasmussen, A.; Brown, M.; Lessard, C. J.; Montgomery, C.; Scofield, R. H.; Sivils, K. L.] Oklahoma Med Res Fdn, Oklahoma City, OK USA.
[Rasmussen, A.; Hefner, K.; Lessard, C. J.; Montgomery, C.; Scofield, R. H.; Sivils, K. L.] Oklahoma Sjogrens Syndrome Ctr Res Translat, Oklahoma City, OK USA.
[Earley, K.] US Air Force, Washington, DC USA.
[Radfar, L.; Lewis, D.; Young, S.; Kaufman, C. E.; Scofield, R. H.] Univ Oklahoma, Hlth Sci Ctr, Norman, OK 73019 USA.
[Segal, B.] Sjogrens Genet Network, Bethesda, MD USA.
[Scofield, R. H.] VA Med Ctr, Portland, VA USA.
[Stone, D.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Stone, D.] King Khalid Eye Specialist Hosp, Riyadh, Saudi Arabia.
NR 0
TC 0
Z9 0
U1 1
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0300-9475
EI 1365-3083
J9 SCAND J IMMUNOL
JI Scand. J. Immunol.
PD MAY
PY 2015
VL 81
IS 5
MA S1.11
BP 335
EP 335
PG 1
WC Immunology
SC Immunology
GA CG6HV
UT WOS:000353401300021
ER
PT J
AU Hoffman, L
Kennedy-Armbruster, C
AF Hoffman, Lisa
Kennedy-Armbruster, Carol
TI CASE STUDY USING BEST PRACTICE DESIGN PRINCIPLES FOR WORKSITE WELLNESS
PROGRAMS
SO ACSMS HEALTH & FITNESS JOURNAL
LA English
DT Article
DE Worksite Wellness; Best Practices; Physical Activity; Case Study
ID HEALTH
C1 [Hoffman, Lisa] Indiana Univ, Hlth IU, Employee Wellness Program, Bloomington, IN 47405 USA.
[Hoffman, Lisa] US Air Force, Washington, DC USA.
[Kennedy-Armbruster, Carol] Indiana Univ, Dept Kinesiol, Bloomington, IN 47405 USA.
RP Hoffman, L (reprint author), Indiana Univ, Hlth IU, Employee Wellness Program, Bloomington, IN 47405 USA.
NR 9
TC 1
Z9 1
U1 1
U2 4
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 1091-5397
EI 1536-593X
J9 ACSMS HEALTH FIT J
JI ACSMS Health Fit. J.
PD MAY-JUN
PY 2015
VL 19
IS 3
BP 30
EP 35
DI 10.1249/FIT.0000000000000125
PG 6
WC Sport Sciences
SC Sport Sciences
GA CG5OK
UT WOS:000353341400007
ER
PT J
AU Leve, FA
AF Leve, Frederick A.
TI Scaled control moment gyroscope dynamics effects on performance
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Control moment gyro; Analytical dynamics; Performance criteria; Scaled
attitude control system; Smallsat
ID SPACECRAFT; AOCS; LAW
AB The majority of the literature that discusses the dynamics of control moment gyroscopes (CMG) contains formulations that are not derived from first principles and make simplifying assumptions early in the derivation, possibly neglecting important contributions. For small satellites, additional dynamics that are no longer negligible are shown to cause an increase in torque error and loss of torque amplification. The goal of the analysis presented here is to provide the reader with a complete and general analytical derivation of the equations for dynamics of a spacecraft with n-CMG and to discuss the performance degradation imposed to CMG actuators when scaling them for small satellites. The paper first derives the equations of motion from first principles for a very general case of a spacecraft with n-CMG. Each contribution of the dynamics is described with its effect on the performance of CMG and its significance on scaled CMG performance is addressed. It is shown analytically and verified numerically, that CMG do not scale properly with performance and care must be taken in their design to,trade performance, size, mass, and power when reducing their scale. (C) 2015 Published by Elsevier Ltd. on behalf of IAA.
C1 Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Leve, FA (reprint author), Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM AFRL.RVSV@us.af.mil
FU Air Force Office of Scientific Research [LRIR11RV15COR]
FX The authors gratefully acknowledges the contribution from the Air Force
Office of Scientific Research under the lab task (LRIR11RV15COR) for
this research.
NR 24
TC 1
Z9 2
U1 1
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
EI 1879-2030
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD MAY-JUN
PY 2015
VL 110
BP 77
EP 88
DI 10.1016/j.actaastro.2015.01.012
PG 12
WC Engineering, Aerospace
SC Engineering
GA CG8YC
UT WOS:000353600600008
ER
PT J
AU Sinclair, AJ
Sherrill, RE
Lovell, TA
AF Sinclair, Andrew J.
Sherrill, Ryan E.
Lovell, T. Alan
TI Geometric interpretation of the Tschauner-Hempel solutions for satellite
relative motion
SO ADVANCES IN SPACE RESEARCH
LA English
DT Article
DE Satellite formation flying; Relative motion; Elliptic orbits
ID STATE TRANSITION MATRIX; BOUNDARY-VALUE PROBLEM; NONLINEAR DIFFERENTIAL
GRAVITY; KEPLERIAN ELLIPTIC ORBIT; RENDEZVOUS PROBLEM; PERIODIC-ORBITS;
RECONFIGURATION; NAVIGATION; GUIDANCE; EQUATIONS
AB The fundamental solutions of the Tschauner-Hempel equations, which describe the motion of a deputy satellite relative to a chief satellite with arbitrary eccentricity, are interpreted geometrically as generalizations of the drifting two-by-one ellipse that describes relative motion in circular orbits. General solutions are formed by taking linear combinations of these fundamental solutions. The amplitudes of these fundamental solutions are proposed as a parameterization of relative motion in elliptic orbits. A simple maneuver scheme is also developed to achieve arbitrary desired changes in the fundamental-solution amplitudes. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
C1 [Sinclair, Andrew J.; Sherrill, Ryan E.] Auburn Univ, Dept Aerosp Engn, Auburn, AL 36849 USA.
[Lovell, T. Alan] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Sinclair, AJ (reprint author), Auburn Univ, Dept Aerosp Engn, 211 Davis Hall, Auburn, AL 36849 USA.
EM sinclair@auburn.edu
RI Sinclair, Andrew/H-2156-2013
FU American Society for Engineering Education's Summer Faculty Fellowship
Program
FX The authors thank the American Society for Engineering Education's
Summer Faculty Fellowship Program; a portion of the research for this
paper was performed under the auspices of this program.
NR 55
TC 6
Z9 6
U1 1
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0273-1177
EI 1879-1948
J9 ADV SPACE RES
JI Adv. Space Res.
PD MAY 1
PY 2015
VL 55
IS 9
BP 2268
EP 2279
DI 10.1016/j.asr.2015.01.032
PG 12
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA CG2AX
UT WOS:000353078400009
ER
PT J
AU Endsley, MR
AF Endsley, Mica R.
TI Situation awareness: operationally necessary and scientifically grounded
SO Cognition Technology & Work
LA English
DT Article
DE Situation awareness; Human error; Theory; Cognition
ID DYNAMIC-SYSTEMS; AUTOMATION; PERFORMANCE; WORKLOAD; LEVEL; TASK
AB Dekker (Cogn Tech Work, doi: 10.1007/s10111-015-0320-8 , 2015) provides a stilted account of situation awareness (SA) in which it is only (or primarily) used to explain away human error. He ignores the large body of work over the past 25 years that has clearly defined SA, builds a strong foundation of cognitive theory on how it works in the brain, and provides a substantial base of scientifically grounded principles for how to improve SA through improvements in display design, automation, and training (see Endsley and Jones, Designing for situation awareness: an approach to human-centered design, 2nd edn. Taylor and Francis, London, 2012). He also ignores work on human error that delves in detail into the reasons for losses of SA in accidents and uses that knowledge to provide needed system improvements. SA is widely recognized by operators and practitioners across aviation, power systems, emergency management, military, medical, and many other domains as being critical to effective decision making and performance. It is incumbent on the human factors profession to respond to this need with improved systems and approaches for enhancing SA in the difficult and complex worlds where it is so essential.
C1 US Air Force, Washington, DC 20330 USA.
RP Endsley, MR (reprint author), US Air Force, Washington, DC 20330 USA.
EM mica.r.endsley-jones.civ@mail.mil
NR 46
TC 3
Z9 3
U1 10
U2 46
PU SPRINGER LONDON LTD
PI LONDON
PA 236 GRAYS INN RD, 6TH FLOOR, LONDON WC1X 8HL, ENGLAND
SN 1435-5558
EI 1435-5566
J9 COGN TECHNOL WORK
JI Cogn. Technol. Work
PD MAY
PY 2015
VL 17
IS 2
BP 163
EP 167
DI 10.1007/s10111-015-0323-5
PG 5
WC Engineering, Industrial; Ergonomics
SC Engineering
GA CG7ER
UT WOS:000353465700003
ER
PT J
AU Chabak, KD
Miao, X
Zhang, C
Walker, DE
Mohseni, PK
Li, XL
AF Chabak, Kelson D.
Miao, Xin
Zhang, Chen
Walker, Dennis E., Jr.
Mohseni, Parsian K.
Li, Xiuling
TI RF Performance of Planar III-V Nanowire-Array Transistors Grown by
Vapor-Liquid-Solid Epitaxy
SO IEEE ELECTRON DEVICE LETTERS
LA English
DT Article
DE Nanowire; parallel-array; radio frequency; transistor; small-signal
model; vapor-liquid-solid
ID MOSFETS; CHANNEL
AB The radio frequency (RF) performance of a III-V transistor comprised of nanowire (NW) high-electron mobility channels, grown by planar vapor-liquid-solid epitaxy in parallel arrays, is examined. An equivalent small-signal circuit model was used to study the contributing extrinsic and intrinsic passive elements on the NW performance as a function of bias and gate length (L-G). Adequate intrinsic gain (g(m)/g(ds)) similar to 25 with low intrinsic (R-i) and terminal resistances (R-G, R-S, R-D) lead to an f(T)/f(max) similar to 30/78 GHz for L-G = 150 nm and NW diameter similar to 160 nm. The gate capacitance (C-g) is extracted and similar to 2/3 of the total C-g is parasitic, which can be reduced with denser NW arrays. Excellent agreement between measured and modeled RF performance is achieved.
C1 [Chabak, Kelson D.; Miao, Xin; Zhang, Chen; Mohseni, Parsian K.; Li, Xiuling] Univ Illinois, Dept Elect & Comp Engn, Champaign, IL 61820 USA.
[Chabak, Kelson D.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Walker, Dennis E., Jr.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Chabak, KD (reprint author), Univ Illinois, Dept Elect & Comp Engn, Champaign, IL 61820 USA.
EM kelson.chabak.1@us.af.mil; xiuling@illinois.edu
RI Miao, Xin/C-2332-2017;
OI Zhang, Chen/0000-0001-8222-4566
FU Electrical, Communications and Cyber Systems through the National
Science Foundation [1001928]; Division of Materials Research [1006581];
Air Force Research Laboratory, Sensors Directorate, Wright-Patterson
AFB, OH, USA
FX This work was supported in part by the Electrical, Communications and
Cyber Systems through the National Science Foundation under Award
1001928 (KDC, XM and XL), in part by the Division of Materials Research
under Award 1006581 (CZ, PKM, and XL), and in part by the Air Force
Research Laboratory, Sensors Directorate, Wright-Patterson AFB, OH, USA.
The review of this letter was arranged by Editor L. Selmi.
NR 16
TC 1
Z9 1
U1 2
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0741-3106
EI 1558-0563
J9 IEEE ELECTR DEVICE L
JI IEEE Electron Device Lett.
PD MAY
PY 2015
VL 36
IS 5
BP 445
EP 447
DI 10.1109/LED.2015.2416978
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA CG8NZ
UT WOS:000353566300008
ER
PT J
AU Kabban, CMS
Greenwell, BM
DeSimio, MP
Derriso, MM
AF Kabban, Christine M. Schubert
Greenwell, Brandon M.
DeSimio, Martin P.
Derriso, Mark M.
TI The probability of detection for structural health monitoring systems:
Repeated measures data
SO STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
LA English
DT Article
DE Probability of detection; structural health monitoring system;
nondestructive evaluation inspection; aircraft; damage detection;
statistical method
AB The United States Air Force currently relies on schedule-based inspections using nondestructive evaluation methods for ensuring airframe integrity. The sensitivity of a nondestructive evaluation method is quantified statistically using a probability of detection process. The purpose of the probability of detection process is to generate a(90 vertical bar 95) metric for a given nondestructive evaluation technique and corresponding defect (e.g. crack). This process could be conducted under various inspection conditions and defect sizes. The set of factors varied in the process is controlled to allow each nondestructive evaluation inspection to be treated as statistically independent. Current United States Air Force structural inspections are performed at time intervals that adhere to the independence assumption. However, the United States Air Force plans to service airframes based on their actual condition instead of the current schedule-based approach. Accordingly, there is emphasis on developing advanced health management technologies, such as structural health monitoring systems, which provide an automated and real-time assessment of a structure's ability to serve its intended purpose. Therefore, structural health monitoring is considered to be equivalent to an in situ nondestructive evaluation structural inspection device. With a structural health monitoring system, the time interval between inspections will be much smaller than the time intervals between nondestructive evaluation inspections. Since structural health monitoring measurements are from the same sensors, in the same location, the independent measurement assumption used to analyze nondestructive evaluation methods is invalid. In this article, we present a statistical method consistent with current probability of detection process, yet designed to appropriately analyze dependent data. We demonstrate this method first with simulated data and then with experimental data from three test specimens of a representative aircraft structural component. This method leverages the advantages of a structural health monitoring system through its frequent measurements while maintaining its usefulness through appropriately computed probability of detection values. Furthermore, we present a numerical method for estimating the number of test specimens needed to achieve a desired
a
90 | 95
value.
C1 [Kabban, Christine M. Schubert; Greenwell, Brandon M.] Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[DeSimio, Martin P.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Derriso, Mark M.] Air Force Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH USA.
RP Kabban, CMS (reprint author), Air Force Inst Technol, Dept Math & Stat, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM christine.schubertkabban@afit.edu
FU AFOSR/RTA [F1ATA03039J001]; [FA8650-11-D-3134]
FX The work of the AFIT authors was supported by the AFOSR/RTA (grant
F1ATA03039J001). The work of the UDRI author was performed under
Contract No. FA8650-11-D-3134.
NR 14
TC 6
Z9 6
U1 0
U2 10
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1475-9217
EI 1741-3168
J9 STRUCT HEALTH MONIT
JI Struct. Health Monit.
PD MAY
PY 2015
VL 14
IS 3
BP 252
EP 264
DI 10.1177/1475921714566530
PG 13
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CG3WM
UT WOS:000353210300006
ER
PT J
AU Ilin, K
Yagotintsev, KA
Zhou, C
Gao, P
Kosse, J
Otten, SJ
Wessel, WAJ
Haugan, TJ
van der Laan, DC
Nijhuis, A
AF Ilin, K.
Yagotintsev, K. A.
Zhou, C.
Gao, P.
Kosse, J.
Otten, S. J.
Wessel, W. A. J.
Haugan, T. J.
van der Laan, D. C.
Nijhuis, A.
TI Experiments and FE modeling of stress-strain state in ReBCO tape under
tensile, torsional and transverse load
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 4th International Workshop on Numerical Modelling of High Temperature
Superconductors (HTSs)3
CY MAY 11-14, 2014
CL ELU, Bratislava, SLOVAKIA
SP HTS Modelling Work Grp, Eurotopes, SuperPower
HO ELU
DE HTS; superconductivity; coated conductor; finite element method;
numerical simulation; mechanical load
ID COATED CONDUCTORS
AB For high current superconductors in high magnet fields with currents in the order of 50 kA, single ReBCO coated conductors must be assembled in a cable. The geometry of such a cable is mostly such that combined torsion, axial and transverse loading states are anticipated in the tapes and tape joints. The resulting strain distribution, caused by different thermal contraction and electromagnetic forces, will affect the critical current of the tapes. Tape performance when subjected to torsion, tensile and transverse loading is the key to understanding limitations for the composite cable performance. The individual tape material components can be deformed, not only elastically but also plastically under these loads. A set of experimental setups, as well as a convenient and accurate method of stress-strain state modeling based on the finite element method have been developed. Systematic measurements on single ReBCO tapes are carried out combining axial tension and torsion as well as transverse loading. Then the behavior of a single tape subjected to the various applied loads is simulated in the model. This paper presents the results of experimental tests and detailed FE modeling of the 3D stress-strain state in a single ReBCO tape under different loads, taking into account the temperature dependence and the elastic-plastic properties of the tape materials, starting from the initial tape processing conditions during its manufacture up to magnet operating conditions. Furthermore a comparison of the simulations with experiments is presented with special attention for the critical force, the threshold where the tape performance becomes irreversibly degraded. We verified the influence of tape surface profile non-uniformity and copper stabilizer thickness on the critical force. The FE models appear to describe the tape experiments adequately and can thus be used as a solid basis for optimization of various cabling concepts.
C1 [Ilin, K.; Yagotintsev, K. A.; Zhou, C.; Gao, P.; Kosse, J.; Otten, S. J.; Wessel, W. A. J.; Nijhuis, A.] Univ Twente, Fac Sci & Technol, NL-7522 NB Enschede, Netherlands.
[Haugan, T. J.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[van der Laan, D. C.] Adv Conductor Technol, Boulder, CO 80301 USA.
[van der Laan, D. C.] Univ Colorado, Boulder, CO 80301 USA.
RI van der Laan, Danko/L-5098-2016
NR 15
TC 8
Z9 8
U1 4
U2 25
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
EI 1361-6668
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD MAY
PY 2015
VL 28
IS 5
AR 055006
DI 10.1088/0953-2048/28/5/055006
PG 17
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA CG1EK
UT WOS:000353015700012
ER
PT J
AU Novotny, SJ
To, D
AF Novotny, Steven J.
To, Dominic
TI Characterization of a high-purity germanium (HPGe) detector through
Monte Carlo simulation and nonlinear least squares estimation
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
LA English
DT Article
DE High-purity germanium detector; Monte Carlo simulation; Nonlinear least
squares estimation
ID EFFICIENCY CALCULATIONS
AB In this paper, we describe a method for determining the full-energy peak efficiency of a high-purity germanium detector using Monte Carlo MCNP simulation with the detector model refined through nonlinear least-squares optimization using experimental measurements. The approach allows for an accurate determination of efficiency curves in the absence of an accurate characterization of the detector by the manufacturer, usually a prerequisite for reliable Monte Carlo simulations.
C1 [Novotny, Steven J.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[To, Dominic] OLGT AFTAC, Colorado Springs, CO 80914 USA.
[To, Dominic] CMAFS, Colorado Springs, CO 80914 USA.
RP Novotny, SJ (reprint author), US Air Force Acad, Dept Phys, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
EM steven.novotny@usafa.edu
NR 15
TC 1
Z9 1
U1 1
U2 2
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0236-5731
EI 1588-2780
J9 J RADIOANAL NUCL CH
JI J. Radioanal. Nucl. Chem.
PD MAY
PY 2015
VL 304
IS 2
BP 751
EP 761
DI 10.1007/s10967-014-3902-7
PG 11
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA CE5FX
UT WOS:000351857600034
ER
PT J
AU Chang, JS
Yang, JW
Lee, DJ
Hallenbeck, PC
AF Chang, Jo-Shu
Yang, Ji-Won
Lee, Duu-Jong
Hallenbeck, Patrick C.
TI Untitled
SO BIORESOURCE TECHNOLOGY
LA English
DT Editorial Material
C1 [Chang, Jo-Shu] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 70100, Taiwan.
[Yang, Ji-Won] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea.
[Lee, Duu-Jong] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan.
[Hallenbeck, Patrick C.] Univ Montreal, Dept Microbiol Infectiol & Immunol, Montreal, PQ H3C 3J7, Canada.
[Hallenbeck, Patrick C.] US Air Force Acad, Dept Biol, Life Sci Res Ctr, Colorado Springs, CO 80840 USA.
RP Chang, JS (reprint author), Natl Cheng Kung Univ, Dept Chem Engn, 1 Univ Rd, Tainan 70100, Taiwan.
EM changjs@mail.ncku.edu.tw; jwyang@kaist.ac.kr; djlee@ntu.edu.tw;
patrick.hallenbeck@umontreal.ca
NR 0
TC 0
Z9 0
U1 1
U2 14
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2015
VL 184
BP 1
EP 1
DI 10.1016/j.biortech.2015.03.027
PG 1
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA CD5CS
UT WOS:000351106100001
PM 25795615
ER
PT J
AU Hallenbeck, PC
Grogger, M
Mraz, M
Veverka, D
AF Hallenbeck, Patrick C.
Grogger, Melanie
Mraz, Megan
Veverka, Donald
TI Building a better Mousetrap I: Using Design of Experiments with
unconfounded ions to discover superior media for growth and lipid
production by Chlorella sp EN1234
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE Biofuels; Algae; Medium optimization; Lipid production; Unconfounded ion
matrix
ID ALGAL BIOFUELS; SUSTAINABLE PRODUCTION; BIODIESEL PRODUCTION; NITROGEN
LIMITATION; MICROALGAE; VULGARIS; ACCUMULATION; TEMPERATURE; METABOLISM;
CHALLENGES
AB An unconfounded Scheffe Mix approach was used to probe important ions and their interactions in supporting biomass and lipid production by Chlorella sp. EN1234. Six major cations and anions; NH4+, NO3-, Na+, K+ PO4 and Cl- were examined. Piepel plots and RSM analysis showed that in a number of cases, the major media anions PO4- and Cl- negatively influence final cell densities, and that maximal cell density is obtained with nitrate over ammonium, with an optimal effect when mixed with equal molar potassium. As well, although it is commonly assumed that lipid content increases in nitrogen deficient media, here little correlation between nitrogen content and total lipid content was found with mixtures that supported high lipid productivity. Thus these mixtures define the composition space within which further R&D might produce the best trade-off between total biomass production and high cellular lipid content. (C) 2014 Elsevier Ltd. All rights reserved.
C1 [Hallenbeck, Patrick C.; Grogger, Melanie; Mraz, Megan; Veverka, Donald] US Air Force Acad, Life Sci Res Ctr, Dept Biol, Colorado Springs, CO 80840 USA.
RP Hallenbeck, PC (reprint author), US Air Force Acad, Life Sci Res Ctr, Dept Biol, 2355 Fac Dr, Colorado Springs, CO 80840 USA.
EM Patrick.hallenbeck@umontreal.ca
FU National Research Council Research Senior Research Associateship Award
at the Life Sciences Research Center, Department of Biology, United
States Air Force Academy
FX The views expressed in this article are those of the authors and do not
reflect the official policy or position of the United States Air Force,
the Department of Defense, or the US Government. PCH is on sabbatical
leave from the Departement de microbiologie, infectiologie, et
immunologie, Universite de Montreal, CP 6128, Centre-ville, Montreal. PQ
H3C 3J7 Canada. We thank Dr. T.J. Evens for initial discussions at the
beginning of this project and for his help in experimental design, Dr.
Juergen Polle for providing strain EN 1234 and Dr. Simina Vintila for
technical assistance (making the 210 solutions). PCH holds a National
Research Council Research Senior Research Associateship Award at the
Life Sciences Research Center, Department of Biology, United States Air
Force Academy.
NR 29
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U1 4
U2 19
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2015
VL 184
BP 82
EP 89
DI 10.1016/j.biortech.2014.10.144
PG 8
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA CD5CS
UT WOS:000351106100012
PM 25465787
ER
PT J
AU Hallenbeck, PC
Grogger, M
Mraz, M
Veverka, D
AF Hallenbeck, Patrick C.
Grogger, Melanie
Mraz, Megan
Veverka, Donald
TI Building a better mousetrap II: Using Design of Experiments with
unconfounded ions to compare the growth of different microalgae
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE Biofuels; Algae; Medium optimization unconfounded ions; Scheffe Mix
Model; Response surface methodology
ID RESPONSE-SURFACE METHODOLOGY; CHLORELLA-VULGARIS; BIODIESEL PRODUCTION;
ALGAL BIOFUELS; SUSTAINABLE PRODUCTION; NITROGEN LIMITATION; LIPID
PRODUCTIVITY; SCENEDESMUS SP; TEMPERATURE; CHALLENGES
AB A large number of unconfounded media variations were used with a Scheffe Mix Model to examine in an unambiguous fashion the effects of variations in six important ions; NH4+, NO3-, Na+, K+, PO4-, and Cl-, on the growth of Chlorella vulgaris. This allows several novel observations on media components, for example, the inhibitory effects of chloride, to be made. Using a side by side comparison, it is shown that two strains of Chlorella show significant physiological and functional differences brought out by this approach. Testing selected formulations with a diverse set of algae demonstrated different effects on both growth and cellular lipid content, in some cases driving significant lipid production. This suggests that future work using a larger portion of media composition space could lead to the development of novel media supporting maximal biomass production and lipid production. (C) 2014 Elsevier Ltd. All rights reserved.
C1 [Hallenbeck, Patrick C.; Grogger, Melanie; Mraz, Megan; Veverka, Donald] US Air Force Acad, Life Sci Res Ctr, Dept Biol, Colorado Springs, CO 80840 USA.
RP Hallenbeck, PC (reprint author), US Air Force Acad, Life Sci Res Ctr, Dept Biol, 2355 Fac Dr, Colorado Springs, CO 80840 USA.
EM Patrick.hallenbeck@umontreal.ca
FU National Research Council Research Senior Research Associateship Award
at the Life Sciences Research Center, Department of Biology, United
States Air Force Academy
FX The views expressed in this article are those of the authors and do not
reflect the official policy or position of the United States Air Force,
the Department of Defense, or the US Government. We thank Dr. T.J. Evens
(USDA-Agricultural Research Service, U.S. Horticultural Research
Laboratory, FL) for initial discussions at the beginning of this project
and for his help in experimental design, Dr. Juergen Polle (Brooklyn
College - CUNY, Brooklyn, NY) for providing strain EN 1234 and Dr.
Simina Vintila (USAF Academy, Department of Biology, Colorado Springs,
CO) for technical assistance (making the 210 solutions). PCH is on
sabbatical leave from the Departement de microbiologie, infectiologie,
et immunologie, Universite de Montreal, CP 6128, Centre-ville, Montreal.
PQ H3C 3J7 Canada and holds a National Research Council Research Senior
Research Associateship Award at the Life Sciences Research Center,
Department of Biology, United States Air Force Academy.
NR 33
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U1 5
U2 20
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2015
VL 184
BP 90
EP 99
DI 10.1016/j.biortech.2014.11.006
PG 10
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA CD5CS
UT WOS:000351106100013
PM 25465789
ER
PT J
AU Hallenbeck, PC
Grogger, M
Mraz, M
Veverka, D
AF Hallenbeck, Patrick C.
Grogger, Melanie
Mraz, Megan
Veverka, Donald
TI The use of Design of Experiments and Response Surface Methodology to
optimize biomass and lipid production by the oleaginous marine green
alga, Nannochloropsis gaditana in response to light intensity, inoculum
size and CO2
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE Biofuels; Algae; Lipid production; Medium optimization; Response Surface
Methodology
ID BIODIESEL PRODUCTION; NITROGEN STARVATION; FATTY-ACID; SUSTAINABLE
PRODUCTION; OCULATA; GROWTH; ACCUMULATION; CHALLENGES; BIOFUELS;
PHOTOBIOREACTORS
AB Biodiesel produced from microalgal lipids is being considered as a potential source of renewable energy. However, a number of hurdles will have to be overcome if such a process is to become practical. One important factor is the volumetric production of biomass and lipid that can be achieved. The marine alga Nannochloropsis gaditana is under study since it is known to be highly oleaginous and has a number of other attractive properties. Factors that might be important in biomass and lipid production by this alga are light intensity, inoculum size and CO2. Here we have carried out for the first time a RSM-DOE study of the influence of these important culture variables and define conditions that maximize biomass production, lipid content (BODIPY (R) fluorescence) and total lipid production. Moreover, flow cytometry allowed the examination on a cellular level of changes that occur in cellular populations as they age and accumulate lipids. (C) 2014 Elsevier Ltd. All rights reserved.
C1 [Hallenbeck, Patrick C.; Grogger, Melanie; Mraz, Megan; Veverka, Donald] US Air Force Acad, Life Sci Res Ctr, Dept Biol, Colorado Springs, CO 80840 USA.
RP Hallenbeck, PC (reprint author), US Air Force Acad, Life Sci Res Ctr, Dept Biol, 2355 Fac Dr, Colorado Springs, CO 80840 USA.
EM patrick.hallenbeck.ctr@usafa.edu
FU Department of Chemistry and Geochemistry, Colorado School of Mines
[11-208-AFA-01]; National Research Council Senior Research Associateship
Award at the Life Sciences Research Center, Department of Biology, the
United States Air Force Academy
FX Dr. Matt Posewitz, Department of Chemistry and Geochemistry, Colorado
School of Mines, is thanked for advice and for providing cultures of
Nannochloropsis gaditana CCMP526 under cooperative research agreement
11-208-AFA-01. P.C.H. holds a National Research Council Senior Research
Associateship Award at the Life Sciences Research Center, Department of
Biology, the United States Air Force Academy.
NR 31
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U1 8
U2 68
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAY
PY 2015
VL 184
BP 161
EP 168
DI 10.1016/j.biortech.2014.09.022
PG 8
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA CD5CS
UT WOS:000351106100022
PM 25304731
ER
PT J
AU Mall, S
Perel, VY
AF Mall, S.
Perel, V. Y.
TI Crack growth behavior under biaxial fatigue with phase difference
SO INTERNATIONAL JOURNAL OF FATIGUE
LA English
DT Article
DE Biaxial fatigue; Phase difference; Crack growth rate; Strain energy
release rate; Aluminum alloy
ID TENSION-TENSION FATIGUE; STRESS-FIELDS; PROPAGATION; 7075-T6
AB Crack growth behavior of aluminum alloy 7075-T6 was characterized under in-plane biaxial tension-tension fatigue with phase differences of 90 degrees or 180 degrees between the two applied orthogonal cyclic loads. The initial single crack, created under the biaxial fatigue without any phase difference, splits into two symmetric cracks under the biaxial fatigue with the phase difference. The split cracks grow without any further branching. Directions of split cracks deviate sharply from the direction of the initial single crack. Under both phase differences of 90 degrees and 180 degrees, lengths of both split cracks are almost the same at a certain number of cycle. Strain energy release rate versus crack growth rate relationships of the split cracks are almost equal to each other. Further, sum of strain energy release rates at a given crack growth rate of both split cracks is equal to that of a single crack under the biaxial fatigue without phase difference. Analytical and finite element analyses are presented to explain the splitting of a crack due to the phase difference between the applied biaxial cyclic loads. Published by Elsevier Ltd.
C1 [Mall, S.; Perel, V. Y.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
FU Office of Corrosion Policy and Oversight, OSD, Washington, DC
FX The authors gratefully acknowledge the support of Office of Corrosion
Policy and Oversight, OSD, Washington, DC (Mr. Richard A. Hays).
NR 15
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U1 2
U2 12
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0142-1123
EI 1879-3452
J9 INT J FATIGUE
JI Int. J. Fatigue
PD MAY
PY 2015
VL 74
BP 166
EP 172
DI 10.1016/j.ijfatigue.2015.01.005
PG 7
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA CC1BG
UT WOS:000350075600018
ER
PT J
AU Eldar, YC
Sidorenko, P
Mixon, DG
Barel, S
Cohen, O
AF Eldar, Yonina C.
Sidorenko, Pavel
Mixon, Dustin G.
Barel, Shaby
Cohen, Oren
TI Sparse Phase Retrieval from Short-Time Fourier Measurements
SO IEEE SIGNAL PROCESSING LETTERS
LA English
DT Article
DE GESPAR; phase retrieval; short-time Fourier transform; sparsity
ID OPTIMIZATION; ALGORITHMS; TRANSFORM
AB We consider the classical 1D phase retrieval problem. In order to overcome the difficulties associated with phase retrieval from measurements of the Fourier magnitude, we treat recovery from the magnitude of the short-time Fourier transform (STFT). We first show that the redundancy offered by the STFT enables unique recovery for arbitrary nonvanishing inputs, under mild conditions. An efficient algorithm for recovery of a sparse input from the STFT magnitude is then suggested, based on an adaptation of the recently proposed GESPAR algorithm. We demonstrate through simulations that using the STFT leads to improved performance over recovery from the oversampled Fourier magnitude with the same number of measurements.
C1 [Eldar, Yonina C.; Barel, Shaby] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel.
[Sidorenko, Pavel; Cohen, Oren] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
[Sidorenko, Pavel; Cohen, Oren] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel.
[Mixon, Dustin G.] US Air Force, Dept Math & Stat, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Eldar, YC (reprint author), Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel.
FU SRC; Intel Collaborative Research Institute for Computational
Intelligence; NSF [DMS-1321779]; ICore - The Israeli Excellence Center
"circle of light"
FX The work of Y. E. Eldar was supported by the SRC and by the Intel
Collaborative Research Institute for Computational Intelligence. The
work of D. G. Mixon was supported by NSF Grant DMS-1321779. This work
was also supported by ICore - The Israeli Excellence Center "circle of
light". The associate editor coordinating the review of this manuscript
and approving it for publication was Prof. Rodrigo C. de Lamare.
NR 25
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Z9 11
U1 2
U2 21
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1070-9908
EI 1558-2361
J9 IEEE SIGNAL PROC LET
JI IEEE Signal Process. Lett.
PD MAY
PY 2015
VL 22
IS 5
BP 638
EP 642
DI 10.1109/LSP.2014.2364225
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA AT7AP
UT WOS:000345088600004
ER
PT J
AU Fernando, KAS
Sahu, S
Liu, YM
Lewis, WK
Guliants, EA
Jafariyan, A
Wang, P
Bunker, CE
Sun, YP
AF Fernando, K. A. Shiral
Sahu, Sushant
Liu, Yamin
Lewis, William K.
Guliants, Elena A.
Jafariyan, Anairhossein
Wang, Ping
Bunker, Christopher E.
Sun, Ya-Ping
TI Carbon Quantum Dots and Applications in Photocatalytic Energy Conversion
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Review
DE quantum dots; carbon dots; graphene quantum dots; photocatalysts; CO2
photoreduction; water-splitting
ID GRAPHENE OXIDE NANOCOMPOSITES; SENSITIZED SOLAR-CELLS; VISIBLE-LIGHT;
HYDROGEN GENERATION; CO2 REDUCTION; SEMICONDUCTOR NANOCRYSTALS; NANOROD
HETEROSTRUCTURES; HYBRID PHOTOCATALYST; HYDROCARBON FUELS;
CHARGE-TRANSFER
AB Quantum dots (QDs) generally refer to nanoscale particles of conventional semiconductors that are subject to the quantum-confinement effect, though other nanomaterials of similar optical and redox properties are also named as QDs even in the absence of strictly,defined quantum confinement. Among such nanomaterials that have attracted tremendous recent interest are carbon dots, which ate small carbon nanoparticles with some form of surface passivation, and graphene quantum dots in various configurations. In this article, we highlight these carbon-based QDs by focusing on their syntheses, on their photoexcited state properties and redox processes, and on their applications as photocatalysts in visible-light carbon dioxide reduction and in water-splitting, as well as on their mechanistic similarities and differences.
C1 [Fernando, K. A. Shiral; Sahu, Sushant] Univ Dayton, Res Inst, Energy Technol & Mat Div, Dayton, OH 45469 USA.
[Sahu, Sushant; Liu, Yamin; Jafariyan, Anairhossein; Wang, Ping] Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
[Sahu, Sushant; Liu, Yamin; Jafariyan, Anairhossein; Wang, Ping] Clemson Univ, Lab Emerging Mat & Technol, Clemson, SC 29634 USA.
[Lewis, William K.; Bunker, Christopher E.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Bunker, CE (reprint author), Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM christopher.bunker@us.af.mil; syaping@clemson.edu
FU Air Force Office of Scientific Research; Air Force Research Laboratory;
National Science Foundation
FX We gratefully acknowledge funding from the Air Force Office of
Scientific Research through the support of Dr. Michael Berman (C.E.B.),
the Air Force Research Laboratory (C.E.B.), and the National Science
Foundation (Y.-P.S.).
NR 117
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Z9 62
U1 109
U2 615
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD APR 29
PY 2015
VL 7
IS 16
BP 8363
EP 8376
DI 10.1021/acsami.5b00448
PG 14
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA CH3LD
UT WOS:000353931300002
PM 25845394
ER
PT J
AU Larson, MA
Nalbantoglu, U
Sayood, K
Zentz, EB
Bartling, AM
Francesconi, SC
Fey, PD
Dempsey, MP
Hinrichs, SH
AF Larson, Marilynn A.
Nalbantoglu, Ufuk
Sayood, Khalid
Zentz, Emily B.
Bartling, Amanda M.
Francesconi, Stephen C.
Fey, Paul D.
Dempsey, Michael P.
Hinrichs, Steven H.
TI Francisella tularensis Subtype A.II Genomic Plasticity in Comparison
with Subtype A.I
SO PLOS ONE
LA English
DT Article
ID VI SECRETION SYSTEM; BACTERIAL GENOMES; PATHOGENICITY ISLAND; MOLECULAR
EPIDEMIOLOGY; SUBSPECIES TULARENSIS; INVERTED REPEATS; SCHU S4;
SEQUENCE; GENES; IDENTIFICATION
AB Although Francisella tularensis is considered a monomorphic intracellular pathogen, molecular genotyping and virulence studies have demonstrated important differences within the tularensis subspecies (type A). To evaluate genetic variation within type A strains, sequencing and assembly of a new subtype A.II genome was achieved for comparison to other completed F. tularensis type A genomes. In contrast with the F. tularensis A.I strains (SCHU S4, FSC198, NE061598, and TI0902), substantial genomic variation was observed between the newly sequenced F. tularensis A.II strain (WY-00W4114) and the only other publically available A.II strain (WY96-3418). Genome differences between WY-00W4114 and WY96-3418 included three major chromosomal translocations, 1580 indels, and 286 nucleotide substitutions of which 159 were observed in predicted open reading frames and 127 were located in intergenic regions. The majority of WY-00W4114 nucleotide deletions occurred in intergenic regions, whereas most of the insertions and substitutions occurred in predicted genes. Of the nucleotide substitutions, 48 (30%) were synonymous and 111 (70%) were nonsynonymous. WY-00W4114 and WY96-3418 nucleotide polymorphisms were predominantly G/C to A/T allelic mutations, with WY-00W4114 having more A+T enrichment. In addition, the A.II genomes contained a considerably higher number of intact genes and longer repetitive sequences, including transposon remnants than the A.I genomes. Together these findings support the premise that F. tularensis A.II may have a fitness advantage compared to the A.I subtype due to the higher abundance of functional genes and repeated chromosomal sequences. A better understanding of the selective forces driving F. tularensis genetic diversity and plasticity is needed.
C1 [Larson, Marilynn A.; Bartling, Amanda M.; Fey, Paul D.; Hinrichs, Steven H.] Univ Nebraska, Med Ctr, Dept Pathol & Microbiol, Omaha, NE 68182 USA.
[Nalbantoglu, Ufuk; Sayood, Khalid] Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA.
[Zentz, Emily B.] OpGen Inc, Gaithersburg, MD USA.
[Francesconi, Stephen C.] Naval Med Res Ctr, Ft Detrick, MD USA.
[Dempsey, Michael P.] US Air Force, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
RP Larson, MA (reprint author), Univ Nebraska, Med Ctr, Dept Pathol & Microbiol, Omaha, NE 68182 USA.
EM malarson@unmc.edu
OI Larson, Marilynn/0000-0002-0633-0313
FU U.S. Army Space and Missile Defense Command [W9113M-07-1-0004]; OpGen,
Inc.
FX This work was supported in part by the U.S. Army Space and Missile
Defense Command, 64 Thomas Johnson Drive, Frederick, MD 21702
(W9113M-07-1-0004) to the University of Nebraska Medical Center (SHH).
There were no additional funding sources for this project. This funder
had no role in study design, data collection and analysis, decision to
publish, or preparation of the manuscript. OpGen, Inc. provided support
in the form of salaries for author EBZ, but did not have any additional
role in the study design, data collection and analysis, decision to
publish, or preparation of the manuscript. The specific role of this
author is articulated in the 'author contributions' section.
NR 52
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U1 0
U2 2
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD APR 28
PY 2015
VL 10
IS 4
AR e0124906
DI 10.1371/journal.pone.0124906
PG 21
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA CG9SE
UT WOS:000353659400064
ER
PT J
AU Glavin, NR
Muratore, C
Jespersen, ML
Hu, JJ
Fisher, TS
Voevodin, AA
AF Glavin, Nicholas R.
Muratore, Christopher
Jespersen, Michael L.
Hu, Jianjun
Fisher, Timothy S.
Voevodin, Andrey A.
TI Temporally and spatially resolved plasma spectroscopy in pulsed laser
deposition of ultra-thin boron nitride films
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ABLATION
AB Physical vapor deposition (PVD) has recently been investigated as a viable, alternative growth technique for two-dimensional materials with multiple benefits over other vapor deposition synthesis methods. The high kinetic energies and chemical reactivities of the condensing species formed from PVD processes can facilitate growth over large areas and at reduced substrate temperatures. In this study, chemistry, kinetic energies, time of flight data, and spatial distributions within a PVD plasma plume ablated from a boron nitride (BN) target by a KrF laser at different pressures of nitrogen gas were investigated. Time resolved spectroscopy and wavelength specific imaging were used to identify and track atomic neutral and ionized species including B+, B*, N+, N*, and molecular species including N-2*, N-2(+), and BN. Formation and decay of these species formed both from ablation of the target and from interactions with the background gas were investigated and provided insights into fundamental growth mechanisms of continuous, amorphous boron nitride thin films. The correlation of the plasma diagnostic results with film chemical composition and thickness uniformity studies helped to identify that a predominant mechanism for BN film formation is condensation surface recombination of boron ions and neutral atomic nitrogen species. These species arrive nearly simultaneously to the substrate location, and BN formation occurs microseconds before arrival of majority of N+ ions generated by plume collisions with background molecular nitrogen. The energetic nature and extended dwelling time of incident N+ ions at the substrate location was found to negatively impact resulting BN film stoichiometry and thickness. Growth of stoichiometric films was optimized at enriched concentrations of ionized boron and neutral atomic nitrogen in plasma near the condensation surface, providing few nanometer thick films with 1:1 BN stoichiometry and good thicknesses uniformity over macroscopic areas. (C) 2015 AIP Publishing LLC.
C1 [Glavin, Nicholas R.; Muratore, Christopher; Jespersen, Michael L.; Hu, Jianjun; Voevodin, Andrey A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Glavin, Nicholas R.; Fisher, Timothy S.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
[Glavin, Nicholas R.; Fisher, Timothy S.] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
[Muratore, Christopher] Univ Dayton, Dayton, OH 45409 USA.
[Jespersen, Michael L.; Hu, Jianjun] Univ Dayton, Res Inst, Dayton, OH 45409 USA.
RP Glavin, NR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM nicholas.glavin.1@us.af.mil; andrey.voevodin@us.af.mil
RI Fisher, Timothy/D-8517-2011
OI Fisher, Timothy/0000-0002-8909-313X
FU U.S. National Science Foundation; Air Force Office of Scientific
Research Aerospace Materials for Extreme Environments Program
[14RX13COR]
FX The authors would like to thank the support of Arthur Safriet and John
Bultman of University of Dayton Research Institute, and Rachel Naguy of
SOCHE Laboratories. TSF thanks support by the U.S. National Science
Foundation through its Scalable Nanomanufacturing program. Financial
support from the Air Force Office of Scientific Research Aerospace
Materials for Extreme Environments Program (14RX13COR) is gratefully
acknowledged.
NR 24
TC 5
Z9 5
U1 0
U2 33
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 28
PY 2015
VL 117
IS 16
AR 165305
DI 10.1063/1.4919068
PG 10
WC Physics, Applied
SC Physics
GA CH2CC
UT WOS:000353831100068
ER
PT J
AU Savich, GR
Sidor, DE
Du, X
Morath, CP
Cowan, VM
Wicks, GW
AF Savich, G. R.
Sidor, D. E.
Du, X.
Morath, C. P.
Cowan, V. M.
Wicks, G. W.
TI Diffusion current characteristics of defect-limited nBn mid-wave
infrared detectors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB Mid-wave infrared, nBn detectors remain limited by diffusion current generated in the absorber region even when defect concentrations are elevated. In contrast, defect-limited conventional pn-junction based photodiodes are subject to Shockley-Read-Hall generation in the depletion region and subsequent carrier drift. Ideal nBn-architecture devices would be limited by Auger 1 generation; however, typical nBn detectors exhibit defect-dominated performance associated with Shockley-Read-Hall generation in the quasi-neutral absorbing region. Reverse saturation current density characteristics for defect-limited devices depend on the minority carrier diffusion length, absorbing layer thickness, and the dominant minority carrier generation mechanism. Unlike pn-based photodiodes, changes in nBn dark current due to elevated defect concentrations do not manifest at small biases, thus, the zero bias resistance area product, RoA, is not a useful parameter for characterizing nBn-architecture photodetector performance. (C) 2015 AIP Publishing LLC.
C1 [Savich, G. R.; Sidor, D. E.; Du, X.; Wicks, G. W.] Univ Rochester, Inst Opt, Rochester, NY 14627 USA.
[Morath, C. P.; Cowan, V. M.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Wicks, GW (reprint author), Univ Rochester, Inst Opt, 275 Hutchison Rd, Rochester, NY 14627 USA.
EM wicks@optics.rochester.edu
FU Army Research Office; Air Force Research Laboratory Space Vehicles
Directorate
FX This work was supported by the Army Research Office (W. Clark) and the
Air Force Research Laboratory Space Vehicles Directorate.
NR 10
TC 0
Z9 0
U1 3
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2015
VL 106
IS 17
AR 173505
DI 10.1063/1.4919450
PG 4
WC Physics, Applied
SC Physics
GA CH2ES
UT WOS:000353839100061
ER
PT J
AU Makri, E
Kottos, T
Vitebskiy, I
AF Makri, Eleana
Kottos, Tsampikos
Vitebskiy, Ilya
TI Reflective optical limiter based on resonant transmission
SO PHYSICAL REVIEW A
LA English
DT Article
ID NONLINEAR ABSORPTION; SEMICONDUCTORS; REFRACTION; SILICON
AB Optical limiters transmit low-level radiation while blocking electromagnetic pulses with excessively high energy (energy limiters) or with excessively high peak intensity (power limiters). A typical optical limiter absorbs most of the high-level radiation, which can cause its overheating and destruction. Here we introduce the concept of a reflective energy limiter which blocks electromagnetic pulses with excessively high total energy by reflecting them back to space, rather than absorbing them. The idea is to use a defect layer with temperature-dependent loss tangent embedded in a low-loss photonic structure. The low-energy pulses with central frequency close to that of the localized defect mode will pass through. But if the cumulative energy carried by the pulse exceeds certain level, the entire photonic structure becomes highly reflective (not absorptive) within a broad frequency range. The underlying physical mechanism is based on self-regulated impedance mismatch which increases dramatically with the cumulative energy carried by the pulse.
C1 [Makri, Eleana; Kottos, Tsampikos] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
[Vitebskiy, Ilya] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Makri, E (reprint author), Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
FU Electromagnetics Portfolio of Dr. Arje Nachman via the Air Force Office
of Scientific Research [LRIR09RY04COR]; AFOSR MURI Grant
[FA9550-14-1-0037]
FX This work is sponsored by the Electromagnetics Portfolio of Dr. Arje
Nachman via the Air Force Office of Scientific Research No.
LRIR09RY04COR and by AFOSR MURI Grant No. FA9550-14-1-0037.
NR 18
TC 6
Z9 6
U1 2
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
EI 1094-1622
J9 PHYS REV A
JI Phys. Rev. A
PD APR 27
PY 2015
VL 91
IS 4
AR 043838
DI 10.1103/PhysRevA.91.043838
PG 6
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA CG7BG
UT WOS:000353456500012
ER
PT J
AU Gentz, G
Thelen, B
Gholarnisheeri, M
Litke, P
Brown, A
Hoke, J
Toulson, E
AF Gentz, Gerald
Thelen, Bryce
Gholarnisheeri, Masumeh
Litke, Paul
Brown, Adam
Hoke, John
Toulson, Elisa
TI A study of the influence of orifice diameter on a turbulent jet ignition
system through combustion visualization and performance characterization
in a rapid compression machine
SO APPLIED THERMAL ENGINEERING
LA English
DT Article
DE Turbulent jet ignition; Combustion visualization; Ignition enhancement
ID SPARK-IGNITION; GAS; COGENERATION; CAMELINA; ENGINE; JP-8
AB Turbulent Jet Ignition is a prechamber initiated combustion system that can replace the spark plug in a standard spark ignition engine. The nozzle orifice is critical in a turbulent jet ignition system as it determines the shape and structure of the jet which acts as a distributed ignition source. In this paper, the effect of nozzle diameter and number was studied by performing combustion visualization and characterization for combustion of a premixed propane/air mixture initiated by a turbulent jet ignition system in a Rapid Compression Machine. Color images of the jet ignition process and visualization of the emission of the chemiluminesence of OH* and CH* radicals were performed. Several nozzle configurations were tested which expanded on the limited experimental results that were available in the literature. The performance of the turbulent jet ignition system based on the nozzle orifice diameter was characterized by considering the 0-10% and 10-90% burn durations of the pressure rise due to combustion. In general it was found that for near stoichiometric air to fuel ratios, a nozzle that produced more spatially distributed jets would result in faster combustion progression. However, at leaner conditions a smaller diameter nozzle that produced a faster and more vigorous jet was required to initiate combustion. The Reynolds number of the discharging jet for the single orifice cases was calculated and it was found that increasing the nozzle diameter increased the Reynolds number, and thus the turbulence for lambda = 1. The Reynolds number was not found to be sensitive to orifice diameter at the leaner condition of lambda = 1.25. Further characterization of the jet development leads to the conclusion that the jet was considered to be in the intermediate flow field; where the transient jet does not have enough time to become fully developed before it reaches the combustion chamber wall. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Gentz, Gerald; Thelen, Bryce; Gholarnisheeri, Masumeh; Toulson, Elisa] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
[Litke, Paul] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Brown, Adam; Hoke, John] Innovat Sci Solut Inc ISSI, Dayton, OH 45459 USA.
RP Toulson, E (reprint author), 1497 Engn Res CT, E Lansing, MI 48823 USA.
EM toulson@msu.edu
FU US Air Force Research Laboratory (AFRL); Innovative Scientific Solutions
Incorporated (ISSI) by Michigan State University [SB07410]
FX This work was performed under the auspices of the US Air Force Research
Laboratory (AFRL) and Innovative Scientific Solutions Incorporated
(ISSI) by Michigan State University under subcontract SB07410.
NR 25
TC 6
Z9 6
U1 3
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-4311
J9 APPL THERM ENG
JI Appl. Therm. Eng.
PD APR 25
PY 2015
VL 81
BP 399
EP 411
DI 10.1016/j.applthermaleng.2015.02.026
PG 13
WC Thermodynamics; Energy & Fuels; Engineering, Mechanical; Mechanics
SC Thermodynamics; Energy & Fuels; Engineering; Mechanics
GA CH0RH
UT WOS:000353729600041
ER
PT J
AU Konkova, T
Mironov, S
Korznikov, A
Korznikova, G
Myshlyaev, MM
Semiatin, SL
AF Konkova, T.
Mironov, S.
Korznikov, A.
Korznikova, G.
Myshlyaev, M. M.
Semiatin, S. L.
TI Grain structure evolution during cryogenic rolling of alpha brass
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Nanostructured materials; Nanofabrication; Grain boundaries;
Microstructure; Scanning electron microscopy
ID MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; TEXTURE DEVELOPMENT; CU-ZN;
COPPER; MICROSTRUCTURE; NANOSTRUCTURE; TEMPERATURES; TITANIUM; ALLOYS
AB High-resolution electron backscatter diffraction (EBSD) was used to study grain structure development during cryogenic rolling of Cu-29.5Zn brass. Microstructure evolution was found to be broadly similar to that occurring during rolling at room temperature. Specifically, favorably-oriented grains (Copper {112} < 111 > and S {123} < 634 > experienced profuse deformation twinning followed by extensive shear banding. This eventually produced an ultrafine structure with a mean grain size of similar to 0.2 mu m. On the other hand, grains with crystallographic orientations close to Brass {110} < 112 > and Goss {110} < 100 > were found to be stable against twinning/shear banding and thus showed no significant grain refinement. As a result, the final structure developed in heavily-rolled material was distinctly inhomogeneous consisting of mm-scale remnants of original grains with poorly developed substructure and ultra-fine grain domains. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Konkova, T.; Korznikov, A.; Korznikova, G.] Rssian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia.
[Mironov, S.] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan.
[Korznikov, A.] Natl Res Tomsk State Univ, Tomsk 634050, Russia.
[Myshlyaev, M. M.] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia.
[Semiatin, S. L.] AFRL RXCM, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mironov, S (reprint author), Tohoku Univ, Grad Sch Engn, Dept Mat Proc, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
RI Korznikov, Alexander/F-1473-2014; SEMIATIN, SHELDON/E-7264-2017
FU Russian Fund of Fundamental Research [14-02-97004]
FX Financial support from the Russian Fund of Fundamental Research (project
No. 14-02-97004) is gratefully acknowledged. The authors are grateful to
P. Klassman for technical assistance during cryogenic rolling.
NR 22
TC 8
Z9 8
U1 1
U2 20
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD APR 25
PY 2015
VL 629
BP 140
EP 147
DI 10.1016/j.jallcom.2014.12.241
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA CB5WW
UT WOS:000349699700024
ER
PT J
AU Karch, BK
Hardie, RC
AF Karch, Barry K.
Hardie, Russell C.
TI Robust super-resolution by fusion of interpolated frames for color and
grayscale images
SO FRONTIERS IN PHYSICS
LA English
DT Article
DE super-resolution; image processing; image restoration
ID ADAPTIVE WIENER FILTER; RECONSTRUCTION; DEMOSAICKING; RESOLUTION;
ARRAYS; MOTION
AB Multi-frame super-resolution (SR) processing seeks to overcome undersampling issues that can lead to undesirable aliasing artifacts in imaging systems. A key factor in effective multi-frame SR is accurate subpixel inter-frame registration. Accurate registration is more difficult when frame-to-frame motion does not contain simple global translation and includes locally moving scene objects. SR processing is further complicated when the camera captures full color by using a Bayer color filter array (CFA). Various aspects of these SR challenges have been previously investigated. Fast SR algorithms tend to have difficulty accommodating complex motion and CFA sensors. Furthermore, methods that can tolerate these complexities tend to be iterative in nature and may not be amenable to real-time processing. In this paper, we present a new fast approach for performing SR in the presence of these challenging imaging conditions. We refer to the new approach as Fusion of Interpolated Frames (FIF) SR. The FIF SR method decouples the demosaicing, interpolation, and restoration steps to simplify the algorithm. Frames are first individually demosaiced and interpolated to the desired resolution. Next, FIF uses a novel weighted sum of the interpolated frames to fuse them into an improved resolution estimate. Finally, restoration is applied to improve any degrading camera effects. The proposed FIF approach has a lower computational complexity than many iterative methods, making it a candidate for real-time implementation. We provide a detailed description of the FIF SR method and show experimental results using synthetic and real datasets in both constrained and complex imaging scenarios. Experiments include airborne grayscale imagery and Bayer CFA image sets with affine background motion plus local motion.
C1 [Karch, Barry K.] Air Force Res Lab, AFRL RYMT, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
[Karch, Barry K.; Hardie, Russell C.] Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
RP Karch, BK (reprint author), Air Force Res Lab, AFRL RYMT, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM barry.karch@us.af.mil
NR 49
TC 0
Z9 0
U1 0
U2 0
PU FRONTIERS RESEARCH FOUNDATION
PI LAUSANNE
PA EPFL SCIENCE PARK, BLDG D, LAUSANNE, 1015, SWITZERLAND
SN 2296-424X
J9 FRONT PHYS
JI Front. Physics
PD APR 24
PY 2015
VL 3
AR 28
DI 10.3389/fphy.2015.00028
PG 14
WC Physics, Multidisciplinary
SC Physics
GA EB2GZ
UT WOS:000387177200001
ER
PT J
AU Golden, EM
Giles, NC
Yang, S
Halliburton, LE
AF Golden, E. M.
Giles, N. C.
Yang, Shan
Halliburton, L. E.
TI Interstitial silicon ions in rutile TiO2 crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRON-PARAMAGNETIC-RESONANCE; TITANIUM-DIOXIDE; REDUCED STATES; DOPED
TIO2; PHOTOCATALYSIS; CHEMISTRY; DEFECTS; ANATASE
AB Electron paramagnetic resonance (EPR) is used to identify a new and unique photoactive silicon- related point defect in single crystals of rutile TiO2. The importance of this defect lies in its assignment to interstitial silicon ions and the unexpected establishment of silicon impurities as a major hole trap in TiO2. Principal g values of this new S = 1/2 center are 1.9159, 1.9377, and 1.9668 with principal axes along the [(1) over bar 10], [001], and [110] directions, respectively. Hyperfine structure in the EPR spectrum shows the unpaired spin interacting equally with two Ti nuclei and unequally with two Si nuclei. These silicon ions are present in the TiO2 crystals as unintentional impurities. Principal values for the larger of the two Si hyperfine interactions are 91.4, 95.4, and 316.4 MHz with principal axes also along the [(1) over bar 10], [001], and [110] directions. The model for the defect consists of two adjacent Si ions, one at a tetrahedral interstitial site and the other occupying a Ti site. Together, they form a neutral nonparamagnetic [Si-int - Si-Ti](0) complex. When a crystal is illuminated below 40 K with 442- nm laser light, holes are trapped by these silicon complexes and form paramagnetic [Siint - SiTi](+) defects, while electrons are trapped at oxygen vacancies. Thermal anneal results show that the [Siint - SiTi](+) EPR signal disappears in two steps, coinciding with the release of electrons from neutral oxygen vacancies and singly ionized oxygen vacancies. These released electrons recombine with the holes trapped at the silicon complexes.
C1 [Golden, E. M.; Giles, N. C.] US Air Force, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
[Yang, Shan] Jackson State Univ, Dept Phys Atmospher Sci & Geosci, Jackson, MS 39217 USA.
[Halliburton, L. E.] W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
RP Halliburton, LE (reprint author), W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
EM larry.halliburton@mail.wvu.edu
NR 34
TC 1
Z9 1
U1 4
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD APR 22
PY 2015
VL 91
IS 13
AR 134110
DI 10.1103/PhysRevB.91.134110
PG 7
WC Physics, Condensed Matter
SC Physics
GA CG4UI
UT WOS:000353282200002
ER
PT J
AU Martinez, O
Sanchez, JC
Ard, SG
Li, AY
Melko, JJ
Shuman, NS
Guo, H
Viggiano, AA
AF Martinez, Oscar, Jr.
Sanchez, Jenny C.
Ard, Shaun G.
Li, Anyang
Melko, Joshua J.
Shuman, Nicholas S.
Guo, Hua
Viggiano, Albert A.
TI Selected-ion flow tube temperature-dependent measurements for the
reactions of O-2(+) with N atoms and N-2(+) with O atoms
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID CONFIGURATION-INTERACTION CALCULATIONS; GAS-PHASE REACTIONS; LABORATORY
MEASUREMENT; THERMAL-ENERGY; POSITIVE-IONS; EXCITED-STATES; MOLECULE;
NITROGEN; OXYGEN; RATES
AB The temperature variation of rate constants has been measured for the gas phase reactions of the oxycation O-2(+) with N atoms and of N-2(+) with O atoms from 120 to 400 K using a variable temperature-selected ion flow tube. Measured room temperature rate constants, 0.75 x 10(-10) cm(3) s(-1) (+/- 30%) for O-2(+) with N and 1.4 x 10(-10) cm(3) s(-1) (+/- 30%) for N-2(+) with O, are in agreement with previously reported values. A temperature dependence of T-0.7(+/- 0.3) is observed for the O-2(+) + N reaction; however, the N-2(+) + O reaction is found to be independent of temperature. Calculations at varying levels of theory were used in tandem with experiments to evaluate likely pathways in potential energy surfaces for the reactions of concern. (C) 2015 AIP Publishing LLC.
C1 [Martinez, Oscar, Jr.; Sanchez, Jenny C.; Ard, Shaun G.; Melko, Joshua J.; Shuman, Nicholas S.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Li, Anyang; Guo, Hua] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
RP Viggiano, AA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
RI Guo, Hua/J-2685-2014; Li, Anyang/J-2138-2016
OI Guo, Hua/0000-0001-9901-053X; Li, Anyang/0000-0001-6634-842X
FU Department of Energy Office of Science, Office of Basic Energy Research
[DE-FG02-05ER15694]; Air Force Office of Scientific Research
[AFOSR-2303EP]; National Research Council; Boston College Institute of
Scientific Research
FX The authors would like to acknowledge support from the following
agencies: H.G., Department of Energy Office of Science, Office of Basic
Energy Research (No. DE-FG02-05ER15694); A.A.V., Air Force Office of
Scientific Research (No. AFOSR-2303EP); O.M., National Research Council;
and J.S. and S.G.A., Boston College Institute of Scientific Research.
NR 32
TC 2
Z9 2
U1 3
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 21
PY 2015
VL 142
IS 15
AR 154305
DI 10.1063/1.4916913
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CG5CC
UT WOS:000353307700030
PM 25903888
ER
PT J
AU Akers, BF
AF Akers, Benjamin F.
TI Modulational instabilities of periodic traveling waves in deep water
SO PHYSICA D-NONLINEAR PHENOMENA
LA English
DT Article
DE Stability; Water waves; Resonance; Benjamin-Feir
ID CAPILLARY SOLITARY WAVES; SURFACE GRAVITY-WAVES; FINITE-AMPLITUDE;
SPECTRAL STABILITY; ZAKHAROV EQUATION; DEPTH; VISCOSITY; DYNAMICS;
PACKETS; TENSION
AB The spectrum of periodic traveling waves in deep water is discussed. A multi-scale method is used, expanding the spectral data and the Bloch parameter in wave amplitude, to compute the size and location of modulated instabilities. The role of these instabilities in limiting the spectrum's analyticity is explained. Both two-dimensional and three-dimensional instabilities are calculated. The asymptotic predictions are compared to numerical simulations. Published by Elsevier B.V.
C1 US Air Force, Inst Technol, Dept Math & Stat, Dayton, OH 45433 USA.
RP Akers, BF (reprint author), US Air Force, Inst Technol, Dept Math & Stat, Dayton, OH 45433 USA.
EM Benjamin.Akers@afit.edu
FU Simons Foundation [313852]
FX This work was partially supported by a grant from the Simons Foundation
(#313852 to Benjamin Akers).
NR 48
TC 0
Z9 0
U1 2
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-2789
EI 1872-8022
J9 PHYSICA D
JI Physica D
PD APR 15
PY 2015
VL 300
BP 26
EP 33
DI 10.1016/j.physd.2015.02.005
PG 8
WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical
SC Mathematics; Physics
GA CH0VP
UT WOS:000353740800003
ER
PT J
AU Zhdanov, BV
Rotondaro, MD
Shaffer, MK
Knize, RJ
AF Zhdanov, B. V.
Rotondaro, M. D.
Shaffer, M. K.
Knize, R. J.
TI Power degradation due to thermal effects in Potassium Diode Pumped
Alkali Laser
SO OPTICS COMMUNICATIONS
LA English
DT Article
DE Alkali lasers; DPAL; Potassium laser; Thermal effects
ID VAPOR LASERS; PHOTOIONIZATION
AB This paper presents results of our study of the performance of a Potassium DPAL operating in pulsed mode with pump pulses from 0.05 to 5 ms long at different pump powers and alkali cell temperatures. The experiments showed the DPAL output power degradation in time with a characteristic time in the range from 0.5 ms to 4.5 ms. We attribute the power degradation to heating of the vapor. The recorded spectrum of the side fluorescence indicates that multi-photon excitation, energy pooling collisions and ionization are also present. (C) 2014 Elsevier B.V. All rights reserved.
C1 [Zhdanov, B. V.; Rotondaro, M. D.; Shaffer, M. K.; Knize, R. J.] US Air Force Acad, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Ste 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
FU High Energy Lasers Joint Technology Office [JTO-14-UPR-0525]
FX We acknowledge support of the High Energy Lasers Joint Technology Office
(Control no. JTO-14-UPR-0525) who funded this research project.
NR 16
TC 11
Z9 12
U1 3
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0030-4018
EI 1873-0310
J9 OPT COMMUN
JI Opt. Commun.
PD APR 15
PY 2015
VL 341
BP 97
EP 100
DI 10.1016/j.optcom.2014.12.021
PG 4
WC Optics
SC Optics
GA CB3AL
UT WOS:000349500000016
ER
PT J
AU Mikolajczyk, A
Gajewicz, A
Rasulev, B
Schaeublin, N
Maurer-Gardner, E
Hussain, S
Leszczynski, J
Puzyn, T
AF Mikolajczyk, Alicja
Gajewicz, Agnieszka
Rasulev, Bakhtiyor
Schaeublin, Nicole
Maurer-Gardner, Elisabeth
Hussain, Saber
Leszczynski, Jerzy
Puzyn, Tomasz
TI Zeta Potential for Metal Oxide Nanoparticles: A Predictive Model
Developed by a Nano-Quantitative Structure-Property Relationship
Approach
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID CONCORDANCE CORRELATION-COEFFICIENT; DIFFERENT VALIDATION CRITERIA; REAL
EXTERNAL PREDICTIVITY; ENGINEERED NANOMATERIALS; AGGREGATION KINETICS;
SURFACE CONDUCTIVITY; CANCER-CELLS; QSAR MODELS; DESCRIPTORS;
CYTOTOXICITY
AB Physico-chemical characterization of nanoparticles in the context of their transport and fate in the environment is an important challenge for risk assessment of nanomaterials. One of the main characteristics that defines the behavior of nanoparticles in solution is zeta potential (zeta). In this paper, we have demonstrated the relationship between zeta potential and a series of intrinsic physico-chemical features of 15 metal oxide nanoparticles revealed by computational study. The here-developed quantitative structureproperty relationship model (nano-QSPR) was able to predict the zeta of metal oxide nanoparticles utilizing only two descriptors: (i) the spherical size of nanoparticles, a parameter from numerical analysis of transmission electron microscopy (TEM) images, and (ii) the energy of the highest occupied molecular orbital per metal atom, a theoretical descriptor calculated by quantum mechanics at semiempirical level of theory (PM6 method). The obtained consensus model is characterized by reasonably good predictivity (Q(EXT)(2) = 0.87). Therefore, the developed model can be utilized for in silico evaluation of properties of novel engineered nanoparticles. This study is a first step in developing a comprehensive and computationally based system to predict physicochemical properties that are responsible for aggregation phenomena in metal oxide nanoparticles.
C1 [Mikolajczyk, Alicja; Gajewicz, Agnieszka; Puzyn, Tomasz] Univ Gdansk, Fac Chem, Inst Environm & Human Hlth Protect, Lab Environm Chemometr, PL-80308 Gdansk, Poland.
[Rasulev, Bakhtiyor; Leszczynski, Jerzy] Jackson State Univ, Dept Chem & Biochem, Interdisciplinary Nanotox Ctr, Jackson, MS 39217 USA.
[Rasulev, Bakhtiyor] N Dakota State Univ, Ctr Computationally Assisted Sci & Technol, Fargo, ND 58108 USA.
[Schaeublin, Nicole; Maurer-Gardner, Elisabeth; Hussain, Saber] Air Force Res Lab, Biol Interact Nanomat, Appl Biotechnol Branch, Human Effectiveness Directorate 711th,Human Perfo, Wright Patterson AFB, OH 45433 USA.
RP Puzyn, T (reprint author), Univ Gdansk, Fac Chem, Inst Environm & Human Hlth Protect, Lab Environm Chemometr, PL-80308 Gdansk, Poland.
EM t.puzyn@qsar.eu.org
OI Puzyn, Tomasz/0000-0003-0449-8339; Rasulev,
Bakhtiyor/0000-0002-7845-4884
FU Polish National Science Center [UMO-2011/01/M/NZ7/01445]; NSF-CREST
Interdisciplinary Center for Nanotoxicity [NSF HRD 0833178]; NSF-CREST
Interdisciplinary Center for Nanotoxicity (EPSCoR)
[362492-190200-01/NSFEPS-090378]
FX This work was supported by the Polish National Science Center (grant no.
UMO-2011/01/M/NZ7/01445). The authors also thank for support of the
NSF-CREST Interdisciplinary Center for Nanotoxicity (grant no. NSF HRD
0833178 and EPSCoR (award no. 362492-190200-01/NSFEPS-090378). The
authors also thank Professor Paola Gramatica for support and for
providing a copy of QSARINS software.
NR 58
TC 18
Z9 18
U1 4
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
EI 1520-5002
J9 CHEM MATER
JI Chem. Mat.
PD APR 14
PY 2015
VL 27
IS 7
BP 2400
EP 2407
DI 10.1021/cm504406a
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CG3JI
UT WOS:000353176100018
ER
PT J
AU Gong, MG
Shastry, TA
Cui, QN
Kohlmeyer, RR
Luck, KA
Rowberg, A
Marks, TJ
Durstock, MF
Zhao, H
Hersam, MC
Ren, SQ
AF Gong, Maogang
Shastry, Tejas A.
Cui, Qiannan
Kohlmeyer, Ryan R.
Luck, Kyle A.
Rowberg, Andrew
Marks, Tobin J.
Durstock, Michael F.
Zhao, Hui
Hersam, Mark C.
Ren, Shenqiang
TI Understanding Charge Transfer in Carbon Nanotube-Fullerene Bulk
Heterojunctions
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE nanocarbon; fullerenes; bulk heterojunction; charge transfer; Mechanism
ID POLYMER SOLAR-CELLS; DENSITY GRADIENT ULTRACENTRIFUGATION;
LIGHT-INTENSITY DEPENDENCE; SPECTRAL-RESPONSE; PHOTODETECTORS;
PERFORMANCE; PHOTOVOLTAICS; ELECTRODES; MORPHOLOGY
AB Semiconducting single-walled carbon nanotube/fullerene bulk heterojunctions exhibit unique optoelectronic properties highly suitable for flexible, efficient, and robust photovoltaics and photodetectors. We investigate charge-transfer dynamics in inverted devices featuring a polyethylenimine-coated ZnO nanowire array infiltrated with these blends and find that trap-assisted recombination dominates transport within the blend and at the active layer/nanowire interface. We find that electrode modifiers suppress this recombination, leading to high performance.
C1 [Gong, Maogang; Ren, Shenqiang] Univ Kansas, Dept Chem, Lawrence, KS 66045 USA.
[Cui, Qiannan; Zhao, Hui] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
[Shastry, Tejas A.; Luck, Kyle A.; Rowberg, Andrew; Marks, Tobin J.; Hersam, Mark C.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Marks, Tobin J.; Hersam, Mark C.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Kohlmeyer, Ryan R.] CNR, Washington, DC 20001 USA.
[Kohlmeyer, Ryan R.; Durstock, Michael F.] Air Force Res Lab, Soft Matter Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hersam, MC (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
EM m-hersam@northwestern.edu; shenqiang@ku.edu
RI Zhao, Hui/A-2703-2009; Hersam, Mark/B-6739-2009; Gong,
Maogang/B-3588-2016;
OI Zhao, Hui/0000-0003-4552-3836; Gong, Maogang/0000-0002-2031-781X;
Rowberg, Andrew/0000-0002-2928-6917
FU Army Research Office - Young Investigator Program [W911NF-14-1-0443];
Department of Energy-Basic Energy Sciences [DE-FG02-13ER46937]; National
Science Foundation - DMR [0954486]; Argonne-Northwestern Solar Energy
Research (ANSER) Center, an Energy Frontier Research Center - U.S.
Department of Energy, Office of Science, Basic Energy Sciences
[DE-SC0001059]; National Science Foundation; National Research Council;
NSF-MRSEC [DMR-1121262]; Keck Foundation; State of Illinois
FX Work at the University of Kansas (S.R) was supported by the Army
Research Office - Young Investigator Program (W911NF-14-1-0443, material
design/self-assembly of carbon heterojunctions), Department of
Energy-Basic Energy Sciences Award No. DE-FG02-13ER46937 (organic
synthesis and physical property measurement), and National Science
Foundation - DMR Award No. 0954486 (H.Z., ultrafast pump-probe
measurements). Work at Northwestern University (M.C.H. and T.J.M.) was
supported as part of the Argonne-Northwestern Solar Energy Research
(ANSER) Center, an Energy Frontier Research Center funded by the U.S.
Department of Energy, Office of Science, Basic Energy Sciences under
Award No. DE-SC0001059. T.A.S. and K.A.L. acknowledge graduate research
fellowships from the National Science Foundation. R.R.K. thanks the
National Research Council for the Postdoctoral Fellowship. UPS was
performed in the NUANCE facility at Northwestern University, which is
supported by the NSF-MRSEC (DMR-1121262), Keck Foundation, and State of
Illinois.
NR 51
TC 5
Z9 5
U1 4
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD APR 8
PY 2015
VL 7
IS 13
BP 7428
EP 7435
DI 10.1021/acsami.5b01536
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA CF7QQ
UT WOS:000352751800045
PM 25797180
ER
PT J
AU Cox, RM
Kim, J
Armentrout, PB
Bartlett, J
VanGundy, RA
Heaven, MC
Ard, SG
Melko, JJ
Shuman, NS
Viggiano, AA
AF Cox, Richard M.
Kim, JungSoo
Armentrout, P. B.
Bartlett, Joshua
VanGundy, Robert A.
Heaven, Michael C.
Ard, Shaun G.
Melko, Joshua J.
Shuman, Nicholas S.
Viggiano, Albert A.
TI Evaluation of the exothermicity of the chemi-ionization reaction Sm plus
O -> SmO+ + e(-)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID COLLISION-INDUCED DISSOCIATION; ROOM-TEMPERATURE KINETICS; ATOMIC
LANTHANIDE CATIONS; SIFT MASS-SPECTROMETRY; X=0-3 BOND-ENERGIES;
GAS-PHASE REACTIONS; GUIDED ION-BEAM; ASSOCIATIVE IONIZATION; GASEOUS
MONOXIDES; SAMARIUM MONOXIDE
AB The exothermicity of the chemi-ionization reaction Sm + O -> SmO+ + e(-) has been re-evaluated through the combination of several experimental methods. The thermal reactivity (300-650 K) of Sm+ and SmO+ with a range of species measured using a selected ion flow tube-mass spectrometer apparatus is reported and provides limits for the bond strength of SmO+, 5.661 eV <= D-0(Sm+-O) <= 6.500 eV. A more precise value is measured to be 5.72(5) +/- 0.07 eV, bracketed by the observed reactivity of Sm+ and SmO+ with several species using a guided ion beam tandem mass spectrometer (GIBMS). Combined with the established Sm ionization energy (IE), this value indicates an exothermicity of the title reaction of 0.08 +/- 0.07 eV, similar to 0.2 eV smaller than previous determinations. In addition, the ionization energy of SmO has been measured by resonantly enhanced two-photon ionization and pulsed-field ionization zero kinetic energy photoelectron spectroscopy to be 5.7427 +/- 0.0006 eV, significantly higher than the literature value. Combined with literature bond energies of SmO, this value indicates an exothermicity of the title reaction of 0.14 +/- 0.17 eV, independent from and in agreement with the GIBMS result presented here. The evaluated thermochemistry also suggests that D-0(SmO) = 5.83 +/- 0.07 eV, consistent with but more precise than the literature values. Implications of these results for interpretation of chemical release experiments in the thermosphere are discussed. (C) 2015 AIP Publishing LLC.
C1 [Cox, Richard M.; Kim, JungSoo; Armentrout, P. B.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
[Bartlett, Joshua; VanGundy, Robert A.; Heaven, Michael C.] Emory Univ, Dept Chem, Atlanta, GA 30322 USA.
[Ard, Shaun G.; Shuman, Nicholas S.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
[Melko, Joshua J.] Univ N Florida, Dept Chem, Jacksonville, FL 32224 USA.
RP Armentrout, PB (reprint author), Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
EM armentrout@chem.utah.edu; mheaven@emory.edu; albert.viggiano@us.af.mil
RI Cox, Richard /C-5001-2017
OI Cox, Richard /0000-0003-1812-3431
FU Air Force Office of Scientific Research under AFOSR [FA9550-14-1-0357,
FA9550-13-1-0006, AFOSR-2303EP]; Boston College Institute of Scientific
Research
FX This material is based upon work supported by the Air Force Office of
Scientific Research under AFOSR Award Nos. FA9550-14-1-0357 (P.B.A.),
FA9550-13-1-0006 (M.C.H.), and AFOSR-2303EP (A.A.V.). S.G.A.
acknowledges the support of Boston College Institute of Scientific
Research.
NR 64
TC 7
Z9 7
U1 1
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 7
PY 2015
VL 142
IS 13
AR 134307
DI 10.1063/1.4916396
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CF6DG
UT WOS:000352646300026
PM 25854243
ER
PT J
AU Sherman, J
Tarnow, J
Peacock, W
Walker, JV
AF Sherman, Julie
Tarnow, Jay
Peacock, Walker
Walker, Jerry V.
TI Reliability and Validity Analyses of the Self-Management Questionnaire
SO CHILD & FAMILY BEHAVIOR THERAPY
LA English
DT Article
DE Oppositional Defiant Disorder (ODD); children; self-management;
depression; assessment; adolescents; psychology; autism
AB The authors developed a parent-report measure to enhance findings for diagnoses and evaluations, and therefore, improve on the assessments currently being widely used for this purpose. Data were gathered on 322 clients (4-18 years old) seeking treatment at a private practice setting. Factor analysis revealed 18 subscales. Scores were internally consistent and distinct from other subscales. In addition, the questionnaire showed good diagnostic utility for depression, Oppositional Defiant Disorder (ODD), and Pervasive Developmental Disorder (PDD). This study provides sufficient evidence of the reliability and validity of the Self-Management Questionnaire (SMQ) to recommend its use for skills and needs assessment with children and adolescents.
C1 [Sherman, Julie] Southeast Texas Behav Solut, Beaumont, TX 77702 USA.
[Tarnow, Jay; Peacock, Walker] Tarnow Ctr Self Management, Houston, TX USA.
[Walker, Jerry V.] US Air Force, Langley Air Force Base, Hampton, VA USA.
RP Sherman, J (reprint author), Southeast Texas Behav Solut, 80 Interstate 10 N,Suite 205, Beaumont, TX 77702 USA.
EM drsherman4@gmail.com
NR 15
TC 0
Z9 0
U1 1
U2 2
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0731-7107
EI 1545-228X
J9 CHILD FAM BEHAV THER
JI Child Fam. Behav. Ther.
PD APR 3
PY 2015
VL 37
IS 2
BP 114
EP 137
DI 10.1080/07317107.2015.1035987
PG 24
WC Psychology, Clinical; Family Studies
SC Psychology; Family Studies
GA CK5OQ
UT WOS:000356275300003
ER
PT J
AU Wolf, SE
Hill, RR
Pignatiello, JJ
AF Wolf, S. E.
Hill, R. R.
Pignatiello, J. J.
TI Analysis of an Intervention for Small Unmanned Aerial System (SUAS)
Accidents: A Case Study Involving Simpson's Paradox
SO Quality Engineering
LA English
DT Article
DE mishap prevention; unmanned aerial vehicle (UAV); small unmanned aerial
system (SUAS); intervention; accident analysis; Simpson's Paradox
ID REMOTELY PILOTED AIRCRAFT; PROPORTIONS; DIFFERENCE; MISHAPS; ERROR
AB ABSTRACT We investigate a process intervention designed to lower small unmanned aerial system (SUAS) mishap rates. The intervention implemented review boards, required various certifications, and produced apparent decreases in flight failures and flight damage, albeit at increased costs. However, we demonstrate how the results actually represent an undetected example of Simpson's Paradox in which aggregated results yield differing conclusions than disaggregated results. We use the Wilson score method to produce confidence intervals on the difference in mishap rates both before and after the intervention. Using this method, we show that no mishap rate reduction was truly attributable to the process intervention. Our case study reinforces the importance of using deeper statistical knowledge when making policy decisions based in part on the statistical analysis of empirical data.
C1 [Wolf, S. E.] AFOTEC 6, Nellis AFB, NV USA.
[Hill, R. R.; Pignatiello, J. J.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Hill, RR (reprint author), US Air Force, Inst Technol, 2950 Hobson Way,Bld 641 Suite 201, Wright Patterson AFB, OH 45433 USA.
EM raymond.hill@afit.edu
NR 19
TC 0
Z9 0
U1 2
U2 8
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 0898-2112
EI 1532-4222
J9 QUAL ENG
JI Qual. Eng.
PD APR 3
PY 2015
VL 27
IS 2
BP 161
EP 167
DI 10.1080/08982112.2014.928728
PG 7
WC Engineering, Industrial; Statistics & Probability
SC Engineering; Mathematics
GA CG7TI
UT WOS:000353507600003
ER
PT J
AU Lederman, RP
Weis, K
Cynthia, RG
AF Lederman, Regina P.
Weis, Karen
Cynthia, Roberts-Gray
TI PRETERM BIRTH AND ANXIETY IN LOW AND HIGH RISK WOMEN: SELECTING ANXIETY
MEASURES & INTERVENTIONS.
SO ANNALS OF BEHAVIORAL MEDICINE
LA English
DT Meeting Abstract
C1 [Lederman, Regina P.] Univ Texas Med Branch, Galeston, TX USA.
[Weis, Karen] US Air Force, San Antonio, TX 78261 USA.
[Cynthia, Roberts-Gray] Third Coast Res & Dev Inc, Galveston, TX 77550 USA.
EM karen.l.weis2.mil@mail.mil; croberts@thirdcoastresearch.com
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0883-6612
EI 1532-4796
J9 ANN BEHAV MED
JI Ann. Behav. Med.
PD APR
PY 2015
VL 49
SU 1
MA 09
BP S54
EP S54
PG 1
WC Psychology, Multidisciplinary
SC Psychology
GA DA5EH
UT WOS:000367825001211
ER
PT J
AU Pressley, T
AF Pressley, Thomas
TI Addressing Core Competencies in Vision and Change: Use of a General
Physiology Course to Reinforce Quantitative and Interdisciplinary
Approaches
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 [Pressley, Thomas] US Air Force Acad, Dept Biol, Colorado Springs, CO 80840 USA.
[Pressley, Thomas] Texas Tech Univ HSC, Dept Med Educ, Lubbock, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA
SN 0892-6638
EI 1530-6860
J9 FASEB J
JI Faseb J.
PD APR
PY 2015
VL 29
SU 1
MA 541.25
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA CR6PV
UT WOS:000361470503221
ER
PT J
AU Weiss, A
Petersen, C
Baldwin, M
Erwin, RS
Kolmanovsky, I
AF Weiss, Avishai
Petersen, Christopher
Baldwin, Morgan
Erwin, R. Scott
Kolmanovsky, Ilya
TI Safe Positively Invariant Sets for Spacecraft Obstacle Avoidance
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID CONSTRAINED LINEAR-SYSTEMS; BOUNDED DISTURBANCES; PREDICTIVE CONTROL
AB This paper presents an obstacle avoidance method for spacecraft relative motion control. In this approach, a connectivity graph is constructed for a set of relative frame points, which form a virtual net centered around a nominal orbital position. The connectivity between points in the virtual net is determined based on the use of safe positively invariant sets for guaranteed collision free maneuvering. A graph search algorithm is then applied to find a maneuver that avoids specified obstacles and adheres to specified thrust limits. As compared to conventional open-loop trajectory optimization, this approach enables the handling of bounded disturbances, which can represent the effects of perturbing forces and model uncertainty, while rigorously guaranteeing that nonconvex and possibly time-varying obstacle avoidance constraints are satisfied. Details for handling a single stationary obstacle, multiple stationary obstacles, moving obstacles, and bounded disturbances are reported and illustrated with simulation case studies.
C1 [Weiss, Avishai; Petersen, Christopher; Kolmanovsky, Ilya] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Baldwin, Morgan; Erwin, R. Scott] US Air Force, Res Lab, Kirtland AFB, NM 87117 USA.
[Baldwin, Morgan] AIAA, Reston, VA USA.
RP Weiss, A (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
FU U.S. Air Force Research Laboratory [FA9453-12-1-0134]
FX This work was supported by the U.S. Air Force Research Laboratory
FA9453-12-1-0134.
NR 26
TC 1
Z9 1
U1 2
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD APR
PY 2015
VL 38
IS 4
BP 720
EP 732
DI 10.2514/1.G000115
PG 13
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CQ0BZ
UT WOS:000360261400017
ER
PT J
AU Ainscough, T
Zanetti, R
Christian, J
Spanos, PD
AF Ainscough, Thomas
Zanetti, Renato
Christian, John
Spanos, Pol D.
TI Q-Method Extended Kalman Filter
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID ATTITUDE-DETERMINATION; SPACECRAFT ATTITUDE; VECTOR OBSERVATIONS;
QUATERNION ESTIMATION; ALGORITHM; REQUEST; QUEST
AB A new algorithm is proposed that smoothly incorporates the nonlinear estimation of the attitude quaternion using Davenport's q-method and the estimation of nonattitude states through an extended Kalman filter. The new algorithm is compared to an existing one and the various similarities and differences are discussed. The validity of the proposed approach is confirmed by numerical simulations.
C1 [Ainscough, Thomas; Zanetti, Renato] Rice Univ, US Air Force, Charles Stark Draper Lab, Houston, TX 77058 USA.
[Zanetti, Renato] Charles Stark Draper Lab, Houston, TX 77058 USA.
[Christian, John] W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26508 USA.
[Spanos, Pol D.] Rice Univ, Ryon Chair Engn, Houston, TX 77005 USA.
RP Ainscough, T (reprint author), Rice Univ, US Air Force, Charles Stark Draper Lab, 17629 El Camino Real,Suite 470, Houston, TX 77058 USA.
EM tainscough@draper.com; rzanetti@draper.com; jachristian@mail.wvu.edu;
spanos@rice.edu
NR 24
TC 6
Z9 6
U1 3
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD APR
PY 2015
VL 38
IS 4
BP 752
EP 760
DI 10.2514/1.G000118
PG 9
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CQ0BZ
UT WOS:000360261400020
ER
PT J
AU Markelonis, AR
Wang, JS
Ullrich, B
Wai, CM
Brown, GJ
AF Markelonis, Andrew R.
Wang, Joanna S.
Ullrich, Bruno
Wai, Chien M.
Brown, Gail J.
TI Nanoparticle film deposition using a simple and fast centrifuge
sedimentation method
SO APPLIED NANOSCIENCE
LA English
DT Article
DE Centrifuge; Films; Simple and fast; Nanoparticles; Deposition
ID LIGHT-EMITTING-DIODES; VAPOR-DEPOSITION; ORDERED ARRAYS; CARBON-DIOXIDE;
PARTICLE-SIZE; POLYMER; NANOCRYSTALS; INTERPARTICLE; SILICON; CELLS
AB Colloidal nanoparticles (NPs) can be deposited uniformly on flat or rough and uneven substrate surfaces employing a standard centrifuge and common solvents. This method is suitable for depositing different types of nanoparticles on a variety of substrates including glass, silicon wafer, aluminum foil, copper sheet, polymer film, plastic, and paper, etc. The thickness of the films can be controlled by the amount of the colloidal nanoparticle solution used in the preparation. The method offers a fast and simple procedure compared to other currently known nanoparticle deposition techniques for studying the optical properties of nanoparticle films.
C1 [Markelonis, Andrew R.; Wai, Chien M.] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
[Wang, Joanna S.; Ullrich, Bruno; Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Wang, JS (reprint author), Air Force Res Lab, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jswang@uidaho.edu
NR 39
TC 1
Z9 1
U1 1
U2 4
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 2190-5509
EI 2190-5517
J9 APPL NANOSCI
JI Appl. Nanosci.
PD APR
PY 2015
VL 5
IS 4
BP 457
EP 468
DI 10.1007/s13204-014-0338-x
PG 12
WC Nanoscience & Nanotechnology
SC Science & Technology - Other Topics
GA CL9KO
UT WOS:000357297300009
ER
PT J
AU Adams, SF
Caplinger, JE
Sommers, BS
AF Adams, S. F.
Caplinger, J. E.
Sommers, B. S.
TI Spatial temperature mapping of an atmospheric microdischarge using
ultraviolet Rayleigh scatter imaging
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
DE atmospheric microdischarge; gas temperature; laser scatter; spatially
resolved temperature
ID MICROPLASMAS; NITROGEN; EXCITATION; EMISSION; PLASMAS; OXYGEN; AIR; N-2
AB Spatially resolved temperature measurements within a microdischarge in atmospheric pressure air have been conducted using Rayleigh scattering of a pulsed ultraviolet laser. Rayleigh scatter images were used to generate highly resolved 1D and 2D profiles of translational temperature, with the analysis based on the ideal gas inverse relationship between temperature and gas density. The technique was shown to be practical to an upper gas temperature limit of approximately 2000 K. Rayleigh scattering results were compared to standard optical emission spectral analyses of N-2(C-3 Pi(u)-> B-3 Pi(g)) bands, where the calculated rotational temperatures from emission agreed consistently with the peak translational temperatures within the microdischarge measured by Rayleigh laser scatter analyses. The results provide distinctive support of the assumption commonly applied for N-2 discharges that the N-2(C-3 Pi(u)) excited state has an identical rotational energy distribution as the N-2(X-1 Sigma(g)) ground state. The microdischarge investigated in this study was found to follow another common assumption for non-thermal discharges; that the translation and rotational temperatures are approximately equal to each other and the vibrational temperature is of a much higher value.
C1 [Adams, S. F.; Sommers, B. S.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Caplinger, J. E.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
RP Adams, SF (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM steven.adams.11@us.af.mil
FU Air Force Office of Scientific Research
FX The authors wish to thank J Clark for his fine consultation and A Tolson
for his technical expertise. This work is partially supported by the Air
Force Office of Scientific Research.
NR 27
TC 1
Z9 1
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
EI 1361-6595
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD APR
PY 2015
VL 24
IS 2
AR 025031
DI 10.1088/0963-0252/24/2/025031
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA CL2ZB
UT WOS:000356816200035
ER
PT J
AU Selesnick, RS
AF Selesnick, R. S.
TI High-energy radiation belt electrons from CRAND
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE radiation belt; electrons; trapped; CRAND
ID ATMOSPHERE; PROTONS; PLASMA; MODEL
AB A calculation of the inner radiation belt electron source from cosmic ray albedo neutron decay (CRAND) is described. High-energy electrons are included by Lorentz-transforming the decay spectrum from the neutron rest frame to the Earth's rest frame and combining with the known high-energy albedo neutron energy spectrum. Balancing the electron source with energy loss to atmospheric neutral atoms and plasma, and with a decay lifetime representative of plasma wave scattering, then provides an estimate of trapped electron intensity. It is well below measured values for low energies, confirming that CRAND is not a significant source of those trapped electrons. For kinetic energies above the maximum decay energy (E > 0.8MeV) a power law energy spectrum approximate to E-4 is predicted. For L = 1.5 and E >= 2 MeV the computed omnidirectional trapped electron intensity exceeds an extrapolation of the measured low-energy exponential energy spectrum.
C1 Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Selesnick, RS (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM richard.selesnick@us.af.mil
FU NASA [NNH14AX18I]; Air Force Research Laboratory under the Heliophysics
Guest Investigators Program
FX Software for evaluating the NRLMSISE-00 model is available from
http://ccmc.gsfc.nasa.gov/modelweb/atmos/nrlmsise00.html; software for
evaluating the GCPM model was provided by D. L. Gallagher; evaluated
albedo neutron intensity (Figure 1) is available from the author. This
work was supported in part by NASA agreement NNH14AX18I with the Air
Force Research Laboratory under the Heliophysics Guest Investigators
Program.
NR 24
TC 2
Z9 2
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR
PY 2015
VL 120
IS 4
BP 2912
EP 2917
DI 10.1002/2014JA020963
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CI6TL
UT WOS:000354894800038
ER
PT J
AU Paul, BD
Bosy, T
AF Paul, Buddha D.
Bosy, Thomas
TI A Sensitive GC-EIMS Method for Simultaneous Detection and Quantification
of JWH-018 and JWH-073 Carboxylic Acid and Hydroxy Metabolites in Urine
SO JOURNAL OF ANALYTICAL TOXICOLOGY
LA English
DT Article
ID QUANTITATIVE MEASUREMENT; CANNABIMIMETIC INDOLES; CB2
AB Synthetic cannabinoids, including JWH-018 and JWH-073, belong to a class of aminoalkylindoles (AAIs) that are smoked to produce an effect similar to tetrahydrocannabinol. Compounds in this class are often collectively known as 'Spice'. After ingestion, these compounds are extensively metabolized to their hydroxy and carboxylic acid metabolites. During forensic analysis, detection of these metabolites in urine is an indication of past exposure to the parent compounds. The analytical process involved hydrolysis of conjugated metabolites by glucuronidase, solvent extraction, derivatization by trifluoroacetic anhydride and hexafluoroisopropanol and GC-EIMS detection. Identification of the unknown was based on the criteria of GC retention time within +/- 2% and mass spectral ion ratio within +/- 20% of that of a standard. Deuterated internal standards of the carboxylic acid metabolites were used for quantification. The acid (JWH-018-COOH, JWH-073-COOH) and hydroxy (JWH-018-OH, JWH-073-OH) metabolites were linear over the concentration range of 0.1-10 and 0.2-10 ng/mL, respectively, with a correlation coefficient-square, R-2 > 0.999 (N = 5). Extraction recoveries of the metabolites were within 79 and 87%. The method was applied to 17 urine specimens collected as part of a military law enforcement investigation. Nine of the specimens tested positive for one or more of the metabolites. When the procedure was extended to screen other AAI compounds, two of the specimens were found to contain JWH-210, JWH-250 (JWH-302 or JWH-201) and JWH-250 (C4 isomers). The GC-EIMS method presented here was found to be suitable for detecting JWH-018 and JWH-073 metabolites and other AAI compounds in urine.
C1 [Paul, Buddha D.; Bosy, Thomas] Off Armed Forces Med Examiner, Div Forens Toxicol, Dover AFB, DE 19902 USA.
RP Paul, BD (reprint author), Off Armed Forces Med Examiner, Div Forens Toxicol, Dover AFB, DE 19902 USA.
EM buddha_paul@yahoo.com
NR 16
TC 3
Z9 4
U1 2
U2 12
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0146-4760
EI 1945-2403
J9 J ANAL TOXICOL
JI J. Anal. Toxicol.
PD APR
PY 2015
VL 39
IS 3
BP 172
EP 182
DI 10.1093/jat/bku178
PG 11
WC Chemistry, Analytical; Toxicology
SC Chemistry; Toxicology
GA CI4CT
UT WOS:000354695000002
PM 25691387
ER
PT J
AU Lee, DA
Vedral, LJ
Smith, DA
Musselman, RL
Pinchuk, AO
AF Lee, David A.
Vedral, L. James
Smith, David A.
Musselman, Randall L.
Pinchuk, Anatoliy O.
TI Low-loss negative index metamaterials for X, Ku, and K microwave bands
SO AIP ADVANCES
LA English
DT Article
AB Low-loss, negative-index of refraction metamaterials were designed and tested for X, Ku, and K microwave frequency bands. An S-shaped, split-ring resonator was used as a unit cell to design homogeneous slabs of negative-index metamaterials. Then, the slabs of metamaterials were cut unto prisms to measure experimentally the negative index of refraction of a plane electromagnetic wave. Theoretical simulations using High-Frequency Structural Simulator, a finite element equation solver, were in good agreement with experimental measurements. The negative index of refraction was retrieved from the angle-and frequency-dependence of the transmitted intensity of the microwave beam through the metamaterial prism and compared well to simulations; in addition, near-field electromagnetic intensity mapping was conducted with an infrared camera, and there was also a good match with the simulations for expected frequency ranges for the negative index of refraction. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Lee, David A.] Mitre Corp, Colorado Springs, CO 80910 USA.
[Vedral, L. James; Smith, David A.; Pinchuk, Anatoliy O.] Univ Colorado, Phys & Energy Sci Dept, Colorado Springs, CO 80918 USA.
[Musselman, Randall L.] US Air Force Acad, Elect & Comp Engn Dept, Colorado Springs, CO 80840 USA.
RP Lee, DA (reprint author), Mitre Corp, 1155 Acad Pk Loop, Colorado Springs, CO 80910 USA.
OI Pinchuk, Anatoliy/0000-0003-1721-5668
FU U.S. Air Force Space Command; U.S. Air Force Summer Faculty Fellowship
Program
FX Mr. Lee gratefully acknowledges the support of this project by the U.S.
Air Force Space Command. Mr. Smith and Dr. Pinchuk gratefully
acknowledge the support of the U.S. Air Force Summer Faculty Fellowship
Program.
NR 13
TC 3
Z9 3
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD APR
PY 2015
VL 5
IS 4
AR 047119
DI 10.1063/1.4918283
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CH2BC
UT WOS:000353827700052
ER
PT J
AU Henkels, KM
Mallets, ER
Dennis, PB
Gomez-Cambronero, J
AF Henkels, Karen M.
Mallets, Elizabeth R.
Dennis, Patrick B.
Gomez-Cambronero, Julian
TI S6K is a morphogenic protein with a mechanism involving Filamin-A
phosphorylation and phosphatidic acid binding
SO FASEB JOURNAL
LA English
DT Article
DE cytoskeleton signaling; cell morphology; morphogenesis; breast cancer;
cell invasion
ID ACTIN CYTOSKELETON; CELL-MIGRATION; IN-VITRO; KINASE; MTOR; SITE
AB Change of cell shape in vivo plays many roles that are central to life itself, such as embryonic development, inflammation, wound healing, and pathologic processes such as cancer metastasis. Nonetheless, the spatiotemporal mechanisms that control the concerted regulation of cell shape remain understudied. Here, we show that ribosomal S6K, which is normally considered a protein involved in protein translation, is a morphogenic protein. Its presence in cells alters the overall organization of the cell surface and cell circularity [(4 pi x area)/(perimeter)(2)] from 0.47 +/- 60.06 units in mock-treated cells to 0.09 +/- 6 0.03 units in S6K-overexpressing macrophages causing stellation and arborization of cell shape. This effect was partially reversed in cells expressing a kinase-inactive S6K mutant and was fully reversed in cells silenced with small interference RNA. Equally important is that S6K is itself regulated by phospholipids, specifically phosphatidic acid, whereby 300 nM 1,2-dioleoyl-sn-glycero-3-phosphate (DOPA), but not the control 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), binds directly to S6K and causes an similar to 2.9-fold increase in S6K catalytic activity. This was followed by an increase in Filamin A (FLNA) functionality as measured by phospho-FLNA (S-2152) expression and by a subsequent elevation of actin nucleation. This reliance of S6K on phosphatidic acid (PA), a curvature-inducing phospholipid, explained the extra-large perimeter of cells that overexpressed S6K. Furthermore, the diversity of the response to S6K in several unrelated cell types (fibroblasts, leukocytes, and invasive cancer cells) that we report here indicates the existence of an underlying common mechanism inmammalian cells. This new signaling set, PA-S6K-FLNA-actin, sheds light for the first time into the morphogenic pathway of cytoskeletal structures that are crucial for adhesion and cell locomotion during inflammation and metastasis.
C1 [Henkels, Karen M.; Mallets, Elizabeth R.; Gomez-Cambronero, Julian] Wright State Univ, Boonshoft Sch Med, Dept Biochem & Mol Biol, Dayton, OH 45435 USA.
[Dennis, Patrick B.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Gomez-Cambronero, J (reprint author), Wright State Univ, Boonshoft Sch Med, Dept Biochem & Mol Biol, 3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
EM julian.cambronero@wright.edu
FU U.S. National Institutes of Health National Heart, Lung, and Blood
Institute [HL056653-14]; American Heart Association [13GRNT17230097]
FX The authors acknowledge Dr. Francisco Alvarez (Emory University) for
helpful discussions on cell morphology and Marium Husain and Francis
Speranza for technical contribution on the transfection efficiency/cell
viability assay and actin polymerization and phagocytosis experiments,
respectively. This work was supported by the U.S. National Institutes of
Health National Heart, Lung, and Blood Institute Grant HL056653-14, and
the American Heart Association Grant 13GRNT17230097.
NR 26
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Z9 1
U1 0
U2 3
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA
SN 0892-6638
EI 1530-6860
J9 FASEB J
JI Faseb J.
PD APR
PY 2015
VL 29
IS 4
BP 1299
EP 1313
DI 10.1096/fj.14-260992
PG 15
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA CH5ZN
UT WOS:000354115000018
PM 25512366
ER
PT J
AU Balthazor, RL
McHarg, MG
Enloe, CL
Mueller, B
Barnhart, DJ
Hoeffner, ZW
Brown, R
Scherliess, L
Wilhelm, LT
AF Balthazor, Richard L.
McHarg, Matthew G.
Enloe, C. Lon
Mueller, Brandon
Barnhart, David J.
Hoeffner, Zachary W.
Brown, Robert
Scherliess, Ludger
Wilhelm, Lance T.
TI Methodology of evaluating the science benefit of various
satellite/sensor constellation orbital parameters to an assimilative
data forecast model
SO RADIO SCIENCE
LA English
DT Article
DE ionosphere; modeling
AB A methodology for evaluating the science benefit of adding space weather sensor data from a modest number of small satellites to the Utah State University Global Assimilation of Ionospheric MeasurementsFull Physics (GAIM-FP) model is presented. Three orbital scenarios are presented, two focusing on improved coverage of narrowly specified regions of interest, and one on global coverage of the ionosphere as a whole. An Observing System Simulation Experiment is used to obtain qualitative and quantitative results of the impact of the various orbital scenarios on the ionospheric specifications. A simulated truth run of the ionosphere is obtained from a first principle model of the ionosphere/plasmasphere model and used to generate global simulated Global Positioning Satellite total electron content (GPS-TEC) data as well as in situ plasma density observations. Initially, only GPS data were assimilated by GAIM-FP, and the results of this limited run were compared to the truth run. Next, the simulated in situ plasma densities corresponding to our three orbital scenarios were assimilated together with the GPS data, and the results were compared to both the truth run and the limited GPS-TEC only GAIM-FP run. These model simulations have shown that adding a constellation of small satellites/sensors in addition to global TEC inputs does indeed converge the GAIM-FP model closer to truth in the situations described.
C1 [Balthazor, Richard L.; McHarg, Matthew G.; Enloe, C. Lon; Mueller, Brandon; Barnhart, David J.; Hoeffner, Zachary W.; Brown, Robert] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Scherliess, Ludger] Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA.
[Wilhelm, Lance T.] AFRL RXCA, Air Force Res Lab, Dayton, OH USA.
RP Balthazor, RL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
EM richard.balthazor@usafa.edu
RI Scherliess, Ludger/A-7499-2016;
OI Scherliess, Ludger/0000-0002-7388-5255; Balthazor,
Richard/0000-0002-4568-7446
FU Air Force Office of Scientific Research; NSF [AGS-1329544]
FX The GAIM-FP data are publicly available on request from USU, POC Ludger
Scherliess, ludger.scherliess@usu.edu. The authors wish to thank the Air
Force Office of Scientific Research for their support. The work at Utah
State University was partially supported by NSF grant AGS-1329544.
Distribution Statement A - Approved for public release; distribution is
unlimited.
NR 25
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Z9 2
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
EI 1944-799X
J9 RADIO SCI
JI Radio Sci.
PD APR
PY 2015
VL 50
IS 4
BP 318
EP 326
DI 10.1002/2014RS005426
PG 9
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA CI1CK
UT WOS:000354478200003
ER
PT J
AU Ghoreyshi, M
Kim, ADH
Jirasek, A
Lofthouse, AJ
Cummings, RM
AF Ghoreyshi, M.
Kim, A. D. H.
Jirasek, A.
Lofthouse, A. J.
Cummings, R. M.
TI Validation of CFD simulations for X-31 wind-tunnel models
SO AERONAUTICAL JOURNAL
LA English
DT Article
ID TURBULENCE MODELS; FLOW PREDICTION; AIRCRAFT; AERODYNAMICS
AB Computational Fluid Dynamics (CFD) has become an attractive method of choice in the design of many aerospace vehicles because of advances in numerical algorithms and convergence acceleration methods. However, the flow around an advanced fighter aircraft is complicated and usually unsteady due to the presence of vortex-dominated flows. The accuracy and predictability of conventional turbulence models for these applications may be questionable and therefore results obtained from these models must be validated and evaluated on the basis of experimental data from wind tunnels and/or flight tests. This work aims to validate CFD simulations of X-31 wind-tunnel models with and without a belly-mounted sting. The sting setup facilitates forced sinusoidal oscillations in one of three modes of: pitch, yaw, and roll. However, the results show that measured aerodynamic data are altered by the turbulent wake behind the sting, even at small angles of attack. The high angle-of-attack flow around the X-31 is also very complicated and unsteady due to canard and wing vortices. Therefore, validation of CFD models for predicting these complex flows can be a very challenging task. The X-31 wind-tunnel experiments were carried out in the German Dutch low-speed wind tunnel at Braunschweig and include aerodynamic force and moment measurement as well as span-wise pressure distributions at locations of 60% and 70% chord length. This data set is used to validate the Cobalt and Kestrel flow solvers and the results are similar and match quiet well with experiments for small to moderate angles of attack. The main discrepancies between CFD and measurements occur close to the wing tip, where leading-edge flaps are located.
C1 [Ghoreyshi, M.; Kim, A. D. H.; Jirasek, A.; Lofthouse, A. J.; Cummings, R. M.] US Air Force Acad, High Performance Comp Res Ctr, Colorado Springs, CO 80840 USA.
RP Ghoreyshi, M (reprint author), US Air Force Acad, High Performance Comp Res Ctr, Colorado Springs, CO 80840 USA.
EM Mehdi.Ghoreyshi@usafa.edu
FU USAFA [FA70001320018]; High Performance Computing Research Center
FX Mehdi Ghoreyshi is supported by USAFA under contract FA70001320018;
their financial support is gratefully acknowledged. Computer time was
provided by the Department of Defense Engineering Research Development
Center (ERDC). The X-31 geometry was provided by NATO RTO Task Group
AVT-161 on assessment of stability and control prediction methods for
NATO air and sea vehicles. The authors appreciate the support provided
by the High Performance Computing Research Center and Col Robert Kraus,
USAFA Chief Scientist. The authors would also like to thank Andreas
Schutte of DLR and Okko Boelens of NLR for providing X-31 experimental
data.
NR 38
TC 1
Z9 1
U1 0
U2 5
PU ROYAL AERONAUTICAL SOC
PI LONDON
PA 4 HAMILTON PL, LONDON W1J 7BQ, ENGLAND
SN 0001-9240
J9 AERONAUT J
JI Aeronaut. J.
PD APR
PY 2015
VL 119
IS 1214
BP 479
EP 500
PG 22
WC Engineering, Aerospace
SC Engineering
GA CH2JJ
UT WOS:000353851200003
ER
PT J
AU Renda, JJ
Harding, AB
Bailey, CW
Guillory, VL
Vandewalle, KS
AF Renda, James J.
Harding, Aaron B.
Bailey, Clifton W.
Guillory, Villa L.
Vandewalle, Kraig S.
TI Microtensile Bond Strength of Lithium Disilicate to Zirconia with the
CAD-on Technique
SO JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
LA English
DT Article
DE All-ceramic; zirconia framework; CAD-on; Press-on; microtensile bond
strength
ID ALL-CERAMIC RESTORATIONS; FIXED PARTIAL DENTURES; 3-YEAR FOLLOW-UP;
VENEERING PORCELAIN; DIFFERENT COMPONENTS; CHIPPING BEHAVIOR; DENTAL
PROSTHESES; IN-VITRO; CORE; RELIABILITY
AB PurposeRecently, a novel technique was introduced to combine lithium disilicate and zirconia into one restoration. The purpose of this study was to compare the microtensile bond strength of veneering ceramic to a zirconia core in two techniques: the e.max (R) CAD-on technique and the Press-on technique.
Materials and MethodsGroup A was prepared by veneering sintered zirconia blocks (e.max (R) ZirCAD) with lithium disilicate blocks (e.max (R) CAD) using the CAD-on technique according to manufacturer's instructions. Group B was prepared by taking sintered e.max (R) ZirCAD blocks and veneering them with fluorapatite glass-ceramic (e.max (R) ZirPress) using the Press-on technique according to manufacturer's instructions. Each block was loaded in a dynamic cyclic loading machine. The blocks were then sectioned into 1 x 1 mm(2) beams (n = 43) using a precision saw, thermocycled, and loaded in tension until failure on a universal testing machine. A mean and standard deviation were determined per group. Data were analyzed using an unpaired t-test ( = 0.05).
ResultsThe mean microtensile bond strengths were 44.0 13.8 MPa for the CAD-on technique and 14.9 +/- 8.8 MPa for the Press-on technique. Significant differences were found between the two groups (p = 2.7E-19).
ConclusionsThe CAD-on technique (lithium disilicate/zirconia) resulted in greater microtensile bond strength than the Press-on technique (fluorapatite glass-ceramic/zirconia).
C1 [Renda, James J.] US Air Force Acad, 10th Dent Squadron, Colorado Springs, CO 80840 USA.
[Harding, Aaron B.] Ramstein AB, 86th Dent Squadron, Ramstein, Germany.
[Bailey, Clifton W.; Guillory, Villa L.; Vandewalle, Kraig S.] JBSA Lackland, Dunn Dent Clin, Adv Educ Gen Dent Residency Program, Lackland AFB, TX 78236 USA.
RP Vandewalle, KS (reprint author), JBSA Lackland, Air Force Postgrad Dent Sch AFPDS, Adv Educ Gen Dent Residency Program, Dent Res,Dunn Dent Clin, 1615 Truemper St, Lackland AFB, TX 78236 USA.
EM kraig.vandewalle.2.ctr@us.af.mil
NR 28
TC 5
Z9 5
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1059-941X
EI 1532-849X
J9 J PROSTHODONT
JI J. Prosthodont.
PD APR
PY 2015
VL 24
IS 3
BP 188
EP 193
DI 10.1111/jopr.12246
PG 6
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA CH0HF
UT WOS:000353699700003
PM 25850949
ER
PT J
AU Morath, CP
Cowan, VM
Treider, LA
Jenkins, GD
Hubbs, JE
AF Morath, Christian P.
Cowan, Vincent M.
Treider, Laura A.
Jenkins, Geoffrey D.
Hubbs, John E.
TI Proton Irradiation Effects on the Performance of III-V-Based, Unipolar
Barrier Infrared Detectors
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article
DE Damage factor; infrared detector; minority carrier lifetime; nBn; proton
irradiation; unipolar barrier detector
ID RADIATION; RESISTANCE; DAMAGE; ARRAY
AB An examination of the collective results from recent experiments quantifying the performance degradation rates of III-V-based, unipolar barrier infrared detectors with various designs and materials, cutoff wavelengths and operating conditions due to 63 MeV proton irradiation is presented. Empirical relationships were established between the radiation damage factors for dark current density, lateral optical collection length, and quantum efficiency and the inverse product of the detectors' cutoff wavelength and operating temperature. Fitting the dark current density damage factor's empirical relationship reflected these detectors' tendency to remain diffusion-limited during irradiation, which was previously established using Arrhenius-analysis of the post-irradiation, temperature-dependent dark current measurements on each. Collectively, the results affirmed the performance degradation stemmed from a reduction of the minority carrier recombination lifetime via generation of additional defects by proton-induced displacement damage. For comparing detector's radiation-tolerance, the results indicated that damage factors alone were not ideal, but their empirical relationships would serve as heuristics in this role.
C1 [Morath, Christian P.; Cowan, Vincent M.; Treider, Laura A.; Jenkins, Geoffrey D.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Hubbs, John E.] Air Force Res Lab, Infrared Radiat Effects Lab, Kirtland AFB, NM 87117 USA.
RP Morath, CP (reprint author), Air Force Res Lab, Kirtland AFB, NM 87117 USA.
EM christian.morath.2@us.af.mil; jhubbs@ball.com
NR 19
TC 7
Z9 7
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD APR
PY 2015
VL 62
IS 2
BP 512
EP 519
DI 10.1109/TNS.2015.2392695
PG 8
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA CF9LZ
UT WOS:000352887500013
ER
PT J
AU Shiffler, D
Schumer, J
Jiang, CQ
AF Shiffler, Don
Schumer, Joe
Jiang, Chungqi
TI Special Issue on Plenary and Invited Papers from ICOPS-BEAMS 2014
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Editorial Material
C1 [Shiffler, Don] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Schumer, Joe] Naval Res Lab, Washington, DC 20375 USA.
[Jiang, Chungqi] Old Dominion Univ, Frank Reidy Ctr Bioelect, Norfolk, VA 23529 USA.
RP Shiffler, D (reprint author), US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
EM don.shiffler@ieee.org; joseph.schumer@nrl.navy.mil; cjiang@odu.edu
NR 0
TC 0
Z9 0
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD APR
PY 2015
VL 43
IS 4
SI SI
BP 913
EP 913
DI 10.1109/TPS.2015.2419411
PN 1
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA CG2OI
UT WOS:000353113700001
ER
PT J
AU Reeves, WK
Durden, LA
Iwakami, M
Vince, KJ
Paul, RR
AF Reeves, Will K.
Durden, Lance A.
Iwakami, Masahiro
Vince, Kent J.
Paul, Robert R.
TI RICKETTSIAL DISEASES AND ECTOPARASITES FROM MILITARY BASES IN JAPAN
SO JOURNAL OF PARASITOLOGY
LA English
DT Article
ID FRAGMENT-LENGTH-POLYMORPHISM; POLYMERASE-CHAIN-REACTION;
HAEMAPHYSALIS-LONGICORNIS TICKS; SCRUB TYPHUS TSUTSUGAMUSHI;
THAI-MYANMAR BORDER; ORIENTIA-TSUTSUGAMUSHI; MURINE TYPHUS;
ANAPLASMA-PHAGOCYTOPHILUM; BARTONELLA-HENSELAE; KANAGAWA PREFECTURE
AB Ectoparasitic arthropods are often vectors of rickettsiosis. We conducted a survey of ectoparasites on U.S. military facilities throughout Japan with the use of specimens submitted by pest control, public health, and veterinary personnel. Over 1,600 individual ectoparasites were collected. Fifteen species were identified, including several significant vectors of human diseases such as scrub typhus and rickettsial spotted fevers. These ectoparasites included Ctenocephalides felis, Haemaphysalis longicornis, Ixodes persulcatus, Leptotrombidium fuji, Leptotrombidium pallidum, and Rhipicephalus sanguineus. Rickettsial agents were detected by PCR and DNA sequencing. These included Bartonella henselae, Bartonella japonica, a novel Bartonella, Coxiella burnetii, an unnamed Coxiella, Ehrlichia canis, Orientia tsutsugamushi, Rickettsia typhi, and "Rickettsia Rf2125''/"Rickettsia cf1and5''.
C1 [Reeves, Will K.; Durden, Lance A.; Iwakami, Masahiro; Vince, Kent J.; Paul, Robert R.] US Air Force, PHR, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
RP Reeves, WK (reprint author), US Air Force, PHR, Sch Aerosp Med, 2510 5th St, Wright Patterson AFB, OH 45433 USA.
EM wkreeves@gmail.com
FU Global Emerging Infections Surveillance and Response System Operations
Division of the Armed Forces Health Surveillance Center
FX We thank J. North, C. Utter, K. Yore, J. Johnson, J. Hertz, D. Smith, J.
Spencer, and the staff at the Department of Defense veterinary clinics
for assistance with collections or laboratory work. Dr. A. Dowling
provided some of the mite identifications. The use of trade names in
this document does not constitute an official endorsement or approval of
the use of such commercial hardware or software. Do not cite this
document for advertisement. A portion of this research was supported by
the Global Emerging Infections Surveillance and Response System
Operations Division of the Armed Forces Health Surveillance Center. The
views expressed in this article are those of the authors and do not
reflect the official policy or position of the Department of the Air
Force, the Department of the Army, the Department of Defense, or the
U.S. Government. Approved for public release; distribution is unlimited,
Case 88ABW-2013-0444.
NR 50
TC 3
Z9 3
U1 0
U2 6
PU AMER SOC PARASITOLOGISTS
PI LAWRENCE
PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA
SN 0022-3395
EI 1937-2345
J9 J PARASITOL
JI J. Parasitol.
PD APR
PY 2015
VL 101
IS 2
BP 150
EP 155
DI 10.1645/14-662.1
PG 6
WC Parasitology
SC Parasitology
GA CG2XG
UT WOS:000353138400005
PM 25548900
ER
PT J
AU Bramschreiber, T
Westmoreland, D
AF Bramschreiber, Terry
Westmoreland, David
TI Preparing Students For Science in the Face of Social Controversy
SO AMERICAN BIOLOGY TEACHER
LA English
DT Article
DE Nature of science; pseudoscience; rationalism; skepticism; empiricism
ID EVOLUTION; COLLEGE
AB Science educators often teach topics that are largely resolved in the scientific community yet remain controversial in broader society. In such cases, students may perceive the teacher as biased. We present two exercises that foster more objective learning about the scientific underpinnings of socially controversial topics. The first exercise clarifies why the scientific resolution of an issue does not necessarily align with social perception. The second applies this concept by having students discriminate science-based claims from other claims.
C1 [Westmoreland, David] US Air Force Acad, Biol, Colorado Springs, CO 80908 USA.
RP Bramschreiber, T (reprint author), Discovery Canyon Campus,1810 North Gate Blvd, Colorado Springs, CO 80921 USA.
EM terry.bramschreiber@asd20.org; david.westmoreland@usafa.edu
NR 8
TC 1
Z9 1
U1 1
U2 5
PU NATL ASSOC BIOLOGY TEACHERS INC
PI RESTON
PA 12030 SUNRISE VALLEY DR, #110, RESTON, VA 20191 USA
SN 0002-7685
EI 1938-4211
J9 AM BIOL TEACH
JI Am. Biol. Teach.
PD APR
PY 2015
VL 77
IS 4
BP 284
EP 288
DI 10.1525/abt.2015.77.4.8
PG 5
WC Biology; Education, Scientific Disciplines
SC Life Sciences & Biomedicine - Other Topics; Education & Educational
Research
GA CF7MU
UT WOS:000352741400008
ER
PT J
AU Fajardo, KA
Keller, P
Kobayashi, T
Hivnor, CM
Webber, BJ
Federinko, SP
Tchandja, J
AF Fajardo, Kevin A.
Keller, Patrick
Kobayashi, Todd
Hivnor, Chad M.
Webber, Bryant J.
Federinko, Susan P.
Tchandja, Juste
TI Bilateral Lower Extremity Inflammatory Lymphedema in Air Force Basic
Trainees Clinical and Epidemiologic Study of a New Disease Entity
SO JAMA DERMATOLOGY
LA English
DT Article
ID IMMUNIZATION; TETANUS; VACCINE
AB IMPORTANCE This observational study characterizes a new clinical condition identified in 55 military trainees.
OBJECTIVE To determine the incidence and underlying cause of bilateral lower extremity inflammatory lymphedemain Air Force basic trainees.
DESIGN, SETTING, AND PARTICIPANTS An observational studywas conducted at Lackland Air Force Base in San Antonio, Texas. Participants included 14 243 Air Force basic trainees who entered training between September 2011 and January 2012 and the 55 trainees (0.4%) who developed bilateral lower extremity inflammatory lymphedema that occurred during the 8 (1/2)-week basic training course. Two modifiable risk factors were evaluated: vaccine reaction and newly issued military footwear (combat boots and boot socks).
INTERVENTIONS During November 2011, all new trainees wore only white socks and running shoes rather than the issued military footwear. During December 2011 and January 2012, the scheduled administration of tetanus/diphtheria/acellular pertussis and meningococcal vaccines, respectively, was delayed by 1 week for all new trainees. A full medical record review was conducted for every confirmed case of bilateral lower extremity inflammatory lymphedema.
MAIN OUTCOMES AND MEASURES Identification of incident cases, symptom onset, antimicrobial treatment, immunization reaction, laboratory studies, specialty referral, and biopsy.
RESULTS Fifty-four of the 55 incident cases (98%) of bilateral lower extremity inflammatory lymphedema occurred during the first 120 hours of training. Alterations in the timing of the military footwear used and selected vaccine administration had no effect on the incidence of new cases. Two participants (4%) experienced symptom onset before receipt of the vaccines. Oral antimicrobial medications were not found to speed symptom resolution compared with conservative treatment measures (P = .34). One incident case was diagnosed as leukocytoclastic vasculitis by tissue examination.
CONCLUSIONS AND RELEVANCE Multiple training-related risk factors were ruled out as sources of bilateral lower extremity inflammatory lymphedema. Cases are likely secondary to prolonged standing with resultant gravity-dependent venous congestion and inflammatory vasculitis. The potential roles of undiagnosed venous reflux disease and the military physical training environment in these cases remain to be elucidated.
C1 [Fajardo, Kevin A.] US Air Force Acad, Aeromed Squadron 10th, Colorado Springs, CO 80840 USA.
[Keller, Patrick] US Air Force, Med Support Agcy, San Antonio, TX USA.
[Kobayashi, Todd; Hivnor, Chad M.] Lackland AFB, Joint Base San Antonio, Med Wing Dermatol Clin 59, San Antonio, TX USA.
[Webber, Bryant J.; Federinko, Susan P.; Tchandja, Juste] Lackland AFB, Joint Base San Antonio, Med Operat Squadron 559, San Antonio, TX USA.
RP Fajardo, KA (reprint author), US Air Force Acad, Aeromed Squadron 10th, 2355 Fac Dr,1N207, Colorado Springs, CO 80840 USA.
EM kevin.fajardo@us.af.mil
NR 5
TC 3
Z9 3
U1 0
U2 2
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 330 N WABASH AVE, STE 39300, CHICAGO, IL 60611-5885 USA
SN 2168-6068
EI 2168-6084
J9 JAMA DERMATOL
JI JAMA Dermatol.
PD APR
PY 2015
VL 151
IS 4
BP 395
EP 400
DI 10.1001/jamadermatol.2014.3794
PG 6
WC Dermatology
SC Dermatology
GA CF6FI
UT WOS:000352652000009
PM 25607253
ER
PT J
AU Taft, BS
Laun, FF
Smith, SM
Hengeveld, DW
AF Taft, Brent S.
Laun, Fritz F.
Smith, Sally M.
Hengeveld, Derek W.
TI Microgravity Performance of a Structurally Embedded Oscillating Heat
Pipe
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article
AB The oscillating heat pipe is a novel, simply formed, wickless heat pipe that relies on the phase-change-induced motion of a contained working fluid to transport heat between the evaporator (hot end) and condenser (cold end). The improved heat transfer capability, simplicity, and reduced mass of oscillating heat pipes have led to great interest in the oscillating heat pipe. This paper details the terrestrial and microgravity validation of an ultrasonic consolidation manufactured structurally embedded oscillating heat pipe. It is shown that 1) for conditions in which an oscillating heat pipe is terrestrially orientation-independent, it is also likely to be gravity-independent, and 2) for conditions in which an oscillating heat pipe is not terrestrially orientation-independent, it is likely to perform better in microgravity than in a terrestrial environment. Additionally, this test campaign provides evidence that the "knee" found in most oscillating heat pipe performance versus input heat curves roughly corresponds to the point at which 1) oscillating heat pipe performance variation drops off, 2) oscillating heat pipe performance becomes orientation-independent, and 3) the oscillating heat pipe performance becomes gravity-independent. These results can be used to better predict oscillating heat pipe performance using terrestrial test data.
C1 [Taft, Brent S.; Laun, Fritz F.; Smith, Sally M.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Hengeveld, Derek W.] LoadPath, Albuquerque, NM 87108 USA.
RP Taft, BS (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
FU Department of Defense (DOD) Space Test Program through the NASA Reduced
Gravity Office
FX The authors would like to thank the Department of Defense (DOD) Space
Test Program for funding of the microgravity aircraft flights through
the NASA Reduced Gravity Office. IsoTherm, Z-Prime, and Advanced
Structurally Embedded Thermal Spreader (ASETS) were integrated and flown
under the direction of the DOD's Space Test Program. Zero-g flights were
conducted 17 June and 26 August 2012.
NR 14
TC 0
Z9 0
U1 0
U2 11
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
EI 1533-6808
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD APR
PY 2015
VL 29
IS 2
BP 329
EP 337
DI 10.2514/1.T4151
PG 9
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA CF5GG
UT WOS:000352584700012
ER
PT J
AU Garcia, SMS
Ortman, BV
Burnett, DG
AF Garcia, Shawn M. S.
Ortman, Brian V.
Burnett, Daniel G.
TI Mental Health Diagnoses and Attrition in Air Force Recruits
SO MILITARY MEDICINE
LA English
DT Article
ID US MILITARY; DISORDERS; PREVALENCE
AB Introduction: Mental disorders effect military readiness. Evaluating the frequency and impact of mental health diagnoses (MHD) in recruits, the source of the military workforce, is key to identifying opportunities for screening and prevention. Objectives: This study assessed the relationship between MHD in the Air Force recruit population and time to discharge. Methods: A recruit cohort at Lackland Air Force Base was followed through Basic Military Training, technical school, and 14 months of service using data from Trainee Health Online Reporting System. Incidence rate of MHD was calculated. A risk ratio and attributable fraction were calculated for attrition comparing recruits with MHD to recruits receiving other diagnoses (non-MHD). A survival analysis was performed on recruits with MHD compared to those with non-MHD. Results: Incidence of MHD was 7.9%. A recruit with a MHD was 4.28 (95% CI = 4.04-4.54) times more likely to separate in the first 14 months of service as compared to a recruit with a non-MHD. Conclusions: Recruits with MHD were separated faster and more often when compared to non-MHD. This study increases visibility of mental health disorders in recruits as a step toward better identifying those at higher risk of attrition.
C1 [Garcia, Shawn M. S.; Burnett, Daniel G.] Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biometr, Bethesda, MD 20814 USA.
[Ortman, Brian V.] Publ Hlth Flight, Langley Afb, VA 23665 USA.
RP Garcia, SMS (reprint author), Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biometr, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
NR 15
TC 1
Z9 1
U1 1
U2 5
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD APR
PY 2015
VL 180
IS 4
BP 436
EP 444
DI 10.7205/MILMED-D-14-00311
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA CF6UJ
UT WOS:000352691600011
PM 25826349
ER
PT J
AU Brown, GW
Sandstrom, MM
Preston, DN
Pollard, CJ
Warner, KF
Sorensen, DN
Remmers, DL
Phillips, JJ
Shelley, TJ
Reyes, JA
Hsu, PC
Reynolds, JG
AF Brown, Geoffrey W.
Sandstrom, Mary M.
Preston, Daniel N.
Pollard, Colin J.
Warner, Kirstin F.
Sorensen, Daniel N.
Remmers, Daniel L.
Phillips, Jason J.
Shelley, Timothy J.
Reyes, Jose A.
Hsu, Peter C.
Reynolds, John G.
TI Statistical Analysis of an Inter-Laboratory Comparison of Small-Scale
Safety and Thermal Testing of RDX
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE Small-scale safety testing; Thermal screening; RDX; Round-robin test;
Proficiency test; Statistical evaluation
ID REDUCED-SENSITIVITY RDX
AB The Integrated Data Collection Analysis (IDCA) program has conducted a proficiency test for small-scale safety and thermal (SSST) testing of homemade explosives (HMEs). Described here are statistical analyses of the results from this test for impact, friction, electrostatic discharge, and differential scanning calorimetry analysis of the RDX Class 5 Type II standard. The material was tested as a well-characterized standard several times during the proficiency test to assess differences among participants and the range of results that may arise for well-behaved explosive materials. The analyses show there are detectable differences among the results from IDCA participants. While these differences are statistically significant, most of them can be justified for comparison purposes to assess potential variability when laboratories attempt to measure identical samples using methods assumed to be nominally the same. The results presented in this report include the average sensitivity results from the IDCA participants and the ranges of values obtained. The ranges represent variation about the mean values of the tests of between 26% and 42%. The magnitude of this variation is attributed to differences in operator, method, and environment as well as the use of different instruments that are also of varying age. The results appear to be a good representation of results generated by the broader safety testing community based on the range of methods, instruments, and environments included in the IDCA proficiency test.
C1 [Brown, Geoffrey W.; Sandstrom, Mary M.; Preston, Daniel N.; Pollard, Colin J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Warner, Kirstin F.; Sorensen, Daniel N.; Remmers, Daniel L.] NSWC IHD, Indian Head, MD USA.
[Phillips, Jason J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Shelley, Timothy J.] Bur Alcohol Tobacco & Firearms, Redstone Arsenal, AL USA.
[Reyes, Jose A.] Appl Res Associates, Tyndall AFB, FL USA.
[Hsu, Peter C.; Reynolds, John G.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Brown, GW (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM reynolds3@llnl.gov
FU Los Alamos National Laboratory; Lawrence Livermore National Laboratory;
Sandia National Laboratories; Air Force Research Laboratory; Indian Head
Division, Naval Surface Warfare - U.S. Department of Homeland Security,
Science and Technology Directorate, Explosives Division; U.S. Department
of Energy [DE-AC52-06NA25396]; U.S. Department of Energy's National
Nuclear Security Administration [DE-AC04-94AL85000]; U.S. Department of
Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344];
[HSHQDC10X00414]
FX The authors thank Doug Bauer, Laura J. Parker, and Greg Struba for their
enthusiastic support. This work was performed by the Integrated Data
Collection Analysis (IDCA) Program, a five-lab effort supported by Los
Alamos National Laboratory, Lawrence Livermore National Laboratory,
Sandia National Laboratories, the Air Force Research Laboratory, and
Indian Head Division, Naval Surface Warfare under sponsorship of the
U.S. Department of Homeland Security, Science and Technology
Directorate, Explosives Division. Los Alamos National Laboratory is
operated by Los Alamos National Security, LLC, for the U.S. Department
of Energy under Contract DE-AC52-06NA25396. Sandia is a multi-program
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the U.S. Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000. This work was performed
under the auspices of the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344. The Air
Force Research Laboratory and Indian Head Division, Naval Surface
Warfare also performed work in support of this effort under contract
HSHQDC10X00414. LLNL-JRNL-653393 (773655).
NR 29
TC 5
Z9 5
U1 0
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0721-3115
EI 1521-4087
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD APR
PY 2015
VL 40
IS 2
BP 221
EP 232
DI 10.1002/prep.201400191
PG 12
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA CF5XG
UT WOS:000352630000010
ER
PT J
AU Lee, CO
Arge, CN
Odstrcil, D
Millward, G
Pizzo, V
Lugaz, N
AF Lee, C. O.
Arge, C. N.
Odstrcil, D.
Millward, G.
Pizzo, V.
Lugaz, N.
TI Ensemble Modeling of Successive Halo CMEs: A Case Study
SO SOLAR PHYSICS
LA English
DT Article
DE Ensemble modeling; Coronal mass ejections, modeling; Solar wind,
modeling; Solar wind, observations
ID CORONAL MASS EJECTIONS; SOLAR-WIND; SUN; HELIOSPHERE; PROPAGATION;
SECCHI; LASCO; EARTH
AB The Wang-Sheeley-Arge (WSA)-Enlil cone modeling system is used for making routine arrival-time forecasts of Earth-directed halo coronal mass ejections (CMEs), since they typically produce the most geoeffective events. A major objective of this work is to better understand the sensitivity of the WSA-Enlil modeling results to input model parameters and how these parameters contribute to the overall model uncertainty and performance. In this study, ensemble-modeling results for a succession of three halo CME events that occurred on 2 -aEuro parts per thousand 4 August 2011 are presented. We investigate the sensitivity of the modeled CME arrival times to small variations in the input-cone properties by creating ensemble sets of numerical simulations for each CME event, based on multiple sets of cone parameters. We find that the accuracy of the modeled CME arrival times not only depends on the small variations to the initial input geometry, but also on the reliable specification of the background solar wind, which is driven by the input maps of the photospheric magnetic field. The accuracy in the arrival-time predictions also depends on whether the cone parameters for all three CMEs are specified in a single WSA-Enlil simulation. The inclusion or exclusion of one or two of the preceding CMEs affects the solar-wind conditions through which the succeeding CME propagates. Although the accuracy of the modeled arrival times is sensitive to the input maps that are used to drive the background solar wind, the spread in the modeling ensemble remains mostly unchanged when different input maps are used.
C1 [Lee, C. O.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Arge, C. N.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Odstrcil, D.] George Mason Univ, Fairfax, VA 22030 USA.
[Millward, G.; Pizzo, V.] NOAA, Space Weather Predict Ctr, Boulder, CO USA.
[Lugaz, N.] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
[Lugaz, N.] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
RP Lee, CO (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
EM clee@ssl.berkeley.edu
RI Lugaz, Noe/C-1284-2008;
OI Lugaz, Noe/0000-0002-1890-6156; Lee, Christina/0000-0002-1604-3326
FU Air Force Office of Scientific Research; Institute for Scientific
Research at Boston College; NASA [NNX15AB87G]
FX This research was performed while C. Lee held a National Research
Council Research Associateship Award at the Air Force Research
Laboratory Space Vehicles Directorate in Kirtland Air Force Base, New
Mexico. C. Lee was also supported by the Air Force Office of Scientific
Research and the Institute for Scientific Research at Boston College.;
N. Lugaz was supported by NASA grant number NNX15AB87G.
NR 30
TC 3
Z9 3
U1 0
U2 5
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
EI 1573-093X
J9 SOL PHYS
JI Sol. Phys.
PD APR
PY 2015
VL 290
IS 4
BP 1207
EP 1229
DI 10.1007/s11207-015-0667-2
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA CF6YU
UT WOS:000352703700010
ER
PT J
AU Hong, VA
Yoneoka, S
Messana, MW
Graham, AB
Salvia, JC
Branchflower, TT
Ng, EJ
Kenny, TW
AF Hong, Vu A.
Yoneoka, Shingo
Messana, Matthew W.
Graham, Andrew B.
Salvia, James C.
Branchflower, Todd T.
Ng, Eldwin J.
Kenny, Thomas W.
TI Fatigue Experiments on Single Crystal Silicon in an Oxygen-Free
Environment
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Article
DE Fatigue; microelectromechanical devices; packaging
ID HIGH-CYCLE FATIGUE; POLYCRYSTALLINE SILICON; STRUCTURAL FILMS;
CRACK-GROWTH; FAILURE; MECHANISMS; STABILITY; SPECIMENS; DEVICES; LAYER
AB The fatigue lifetime of single crystal silicon (SCS) was characterized in an environment free of oxygen, humidity, and organics. Long-term (>10(10) Hz) fatigue experiments performed with smooth-walled SCS devices showed no signs of fatigue damage up to 7.5 GPa. In contrast, experiments using SCS devices with a silicon dioxide (SiO2) coating and rough sidewalls due to scalloping from deep reactive ion etching exhibited fatigue drift at 2.7 GPa and suffered from short-term (< 10(10) Hz) fatigue failure at stress levels >3 GPa. In these SCS-SiO2 experiments, the initiation of fracture occurs in the SiO2 layer. It is concluded that fatigue in this case is likely attributed to a subcritical cracking mechanism; not reaction-layer nor dislocation related. A cross-comparison with other works from literature is developed to show that packaging a pristine device in an inert environment is necessary in order to operate devices at high-stress levels.
C1 [Hong, Vu A.; Graham, Andrew B.; Ng, Eldwin J.; Kenny, Thomas W.] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
[Yoneoka, Shingo] mCube Inc, San Jose, CA 95131 USA.
[Messana, Matthew W.] SkyBox Imaging, Mountain View, CA 94043 USA.
[Salvia, James C.] InvenSense Corp, San Jose, CA 95110 USA.
[Branchflower, Todd T.] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Hong, VA (reprint author), Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
EM vuhong@stanford.edu; syoneoka@gmail.com; mmessana@gmail.com;
andrew.blake.graham@gmail.com; jimsalvia@gmail.com;
kenny@cdr.stanford.edu
FU Defense Advanced Research Projects Agency through the N/MEMS S&T
Fundamentals Program; National Nanofabrication Users Network facilities
through the National Science Foundation [ECS-9731294]
FX This work was supported in part by the Defense Advanced Research
Projects Agency through the N/MEMS S&T Fundamentals Program, and in part
by the National Nanofabrication Users Network facilities through the
National Science Foundation under Award ECS-9731294.
NR 37
TC 7
Z9 7
U1 1
U2 13
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1057-7157
EI 1941-0158
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD APR
PY 2015
VL 24
IS 2
BP 351
EP 359
DI 10.1109/JMEMS.2014.2331231
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA CF1BI
UT WOS:000352278200013
ER
PT J
AU Eliasson, B
Milikh, G
Shao, X
Mishin, EV
Papadopoulos, K
AF Eliasson, B.
Milikh, G.
Shao, X.
Mishin, E. V.
Papadopoulos, K.
TI Incidence angle dependence of Langmuir turbulence and artificial
ionospheric layers driven by high-power HF-heating
SO JOURNAL OF PLASMA PHYSICS
LA English
DT Article
AB We have numerically investigated the development of strong Langmuir turbulence (SLT) and associated electron acceleration at different angles of incidence of ordinary (O) mode pump waves. For angles of incidence within the Spitze cone, the turbulence initially develops within the first maximum of the Airy pattern near the plasma resonance altitude. After a few milliseconds, the turbulent layer shifts downwards by about 1 km. For injections outside the Spitze region, the turning point of the pump wave is at lower altitudes. Yet, an Airy-like pattern forms here, and the turbulence development is quite similar to that for injections within the Spitze. SLT leads to the acceleration of 10-20 eV electrons that ionize the neutral gas thereby creating artificial ionospheric layers. Our numerical modeling shows that most efficient electron acceleration and ionization occur at angles between the magnetic and geographic zenith, where SLT dominates over weak turbulence. Possible effects of the focusing of the electromagnetic beam on magnetic field-aligned density irregularities and the finite heating beam width at the magnetic zenith are also discussed. The results have relevance to ionospheric heating experiments using ground-based, high-power radio transmitters to heat the overhead plasma, where recent observations of artificial ionization layers have been made.
C1 [Eliasson, B.; Milikh, G.; Shao, X.; Papadopoulos, K.] Univ Maryland, Dept Phys & Astron, College Pk, MD 20742 USA.
[Eliasson, B.] Univ Strathclyde, SUPA, Dept Phys, Glasgow, Lanark, Scotland.
[Mishin, E. V.] US Air Force, Res Lab, Kirtland AFB, Space Vehicles Directorate, Albuquerque, NM USA.
RP Eliasson, B (reprint author), Univ Maryland, Dept Phys & Astron, College Pk, MD 20742 USA.
EM bengt.eliasson@strath.ac.uk
RI Shao, Xi/H-9452-2016
FU DARPA [N684228]; BAE Systems; MURI [N000140710789, FA95501410019]; Air
Force Office of Scientific Research
FX This work was supported by DARPA via a subcontract N684228 with BAE
Systems and also by the MURI grants N000140710789 and FA95501410019. EVM
was supported by the Air Force Office of Scientific Research.
NR 19
TC 4
Z9 4
U1 0
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-3778
EI 1469-7807
J9 J PLASMA PHYS
JI J. Plasma Phys.
PD APR
PY 2015
VL 81
AR 415810201
DI 10.1017/S0022377814000968
PN 2
PG 16
WC Physics, Fluids & Plasmas
SC Physics
GA CE9WL
UT WOS:000352194000010
ER
PT J
AU Schneeloch, J
Knarr, SH
Howland, GA
Howell, JC
AF Schneeloch, James
Knarr, Samuel H.
Howland, Gregory A.
Howell, John C.
TI Demonstrating continuous variable Einstein-Podolsky-Rosen steering in
spite of finite experimental capabilities using Fano steering bounds
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID QUANTUM; COMMUNICATION; STATES; KEY
AB We show how one can demonstrate continuous-variable Einstein-Podolsky-Rosen (EPR) steering without needing to characterize entire measurement probability distributions. To do this, we develop a modified Fano inequality useful for discrete measurements of continuous variables and use it to bound the conditional uncertainties in continuous-variable entropic EPR-steering inequalities. With these bounds, we show how one can hedge against experimental limitations including a finite detector size, dead space between pixels, and any such factors that impose an incomplete sampling of the true measurement probability distribution. Furthermore, we use experimental data from the position and momentum statistics of entangled photon pairs in parametric downconversion to show that this method is sufficiently sensitive for practical use. (C) 2015 Optical Society of America
C1 [Schneeloch, James; Knarr, Samuel H.; Howell, John C.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
[Schneeloch, James; Knarr, Samuel H.; Howell, John C.] Univ Rochester, Ctr Coherence & Quantum Opt, Rochester, NY 14627 USA.
[Howland, Gregory A.] Air Force Res Lab, Rome, NY USA.
RP Schneeloch, J (reprint author), Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
EM jschneel@pas.rochester.edu
FU DARPA DSO InPho [W911NF-10-1-0404]; DARPA DSO [W31P4Q-12-1-0015]; AFOSR
[FA9550-13-1-0019]
FX We gratefully acknowledge Daniel J. Lum's contributions in streamlining
our measurement process, as well as support from DARPA DSO InPho Grant
No. W911NF-10-1-0404, DARPA DSO Grant No. W31P4Q-12-1-0015, and AFOSR
Grant No. FA9550-13-1-0019.
NR 20
TC 2
Z9 2
U1 1
U2 2
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD APR 1
PY 2015
VL 32
IS 4
BP A8
EP A14
DI 10.1364/JOSAB.32.0000A8
PG 7
WC Optics
SC Optics
GA CE9CZ
UT WOS:000352142500003
ER
PT J
AU Mukhopadhyay, S
Wolff, R
Meade, J
Detweiler, R
Maurer, R
Mitchell, S
Guss, P
Lacy, JL
Sun, L
Athanasiades, A
AF Mukhopadhyay, Sanjoy
Wolff, Ronald
Meade, John
Detweiler, Ryan
Maurer, Richard
Mitchell, Stephen
Guss, Paul
Lacy, Jeffrey L.
Sun, Liang
Athanasiades, Athanasios
TI NEUTRON MULTIPLICITY MEASUREMENTS WITH He-3 ALTERNATIVE: STRAW NEUTRON
DETECTORS
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE neutron multiplicity; fission meter; straw neutron detector
AB Counting neutrons emitted by special nuclear material (SNM) and differentiating them from the background neutrons of various origins is the most effective passive means of detecting SNM. Unfortunately, neutron detection, counting, and partitioning in a maritime environment are complex due to the presence of high-multiplicity spallation neutrons (commonly known as "ship effect") and to the complicated nature of the neutron scattering in that environment. A prototype neutron detector was built using B-10 as the converter in a special form factor called "straws" that would address the above problems by looking into the details of multiplicity distributions of neutrons originating from a fissioning source. This paper describes the straw neutron multiplicity counter (NMC) and assesses the performance with those of a commercially available fission meter. The prototype straw neutron detector provides a large-area, efficient, lightweight, more granular (than fission meter) neutron-responsive detection surface (to facilitate imaging) to enhance the ease of application of fission meters. Presented here are the results of preliminary investigations, modeling, and engineering considerations leading to the construction of this prototype. This design is capable of multiplicity and Feynman variance measurements. This prototype may lead to a near-term solution to the crisis that has arisen from the global scarcity of He-3 by offering a viable alternative to fission meters.
This paper describes the work performed during a 2-year site-directed research and development (SDRD) project that incorporated straw detectors for neutron multiplicity counting. The NMC is a two-panel detector system. We used B-10 (in the form of enriched boron carbide: (B4C)-B-10) for neutron detection instead of He-3. In the first year, the project worked with a panel of straw neutron detectors, investigated its characteristics, and developed a data acquisition (DAQ) system to collect neutron multiplicity information from spontaneous fission sources using a single panel consisting of 60 straws equally distributed over three rows in high-density polyethylene moderator. In the following year, we developed the field-programmable gate array and associated DAQ software. This SDRD effort successfully produced a prototype NMC with similar to 33% detection efficiency compared to a commercial fission meter.
C1 [Mukhopadhyay, Sanjoy; Wolff, Ronald; Meade, John; Detweiler, Ryan; Maurer, Richard] Remote Sensing Lab Andrews, Andrews AFB, MD USA.
[Mitchell, Stephen] Nat Secur Technol LLC, North Las Vegas Operat, Las Vegas, NV 89193 USA.
[Guss, Paul] Remote Sensing Lab Nellis, Las Vegas, NV USA.
[Lacy, Jeffrey L.; Sun, Liang; Athanasiades, Athanasios] Proport Technol Inc, Houston, TX 77054 USA.
RP Mukhopadhyay, S (reprint author), Remote Sensing Lab Andrews, Bldg 1783,Arnold Ave, Andrews AFB, MD USA.
EM mukhops@nv.doe.gov
FU National Security Technologies, LLC [DE-AC52-06NA25946]; U.S. Department
of Energy; SDRD program
FX This manuscript has been authored by National Security Technologies,
LLC, under contract DE-AC52-06NA25946 with the U.S. Department of Energy
and supported by the SDRD program.
NR 7
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD APR
PY 2015
VL 190
IS 1
BP 28
EP 35
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA CF6PG
UT WOS:000352678000003
ER
PT J
AU Rajabi, S
Saremi, M
Barnaby, HJ
Edwards, A
Kozicki, MN
Mitkova, M
Mahalanabis, D
Gonzalez-Velo, Y
Mahmud, A
AF Rajabi, S.
Saremi, M.
Barnaby, H. J.
Edwards, A.
Kozicki, M. N.
Mitkova, M.
Mahalanabis, D.
Gonzalez-Velo, Y.
Mahmud, A.
TI Static impedance behavior of programmable metallization cells
SO SOLID-STATE ELECTRONICS
LA English
DT Article
DE Chalcogenide; Impedance; Parametric model; Programmable metallization
cells; Resistive RAM (ReRAM); Nano-ionic memory
ID RESISTIVE SWITCHING MEMORIES; GE-SE GLASSES; THIN-FILMS; ANALOG
MEMRISTORS; AG; CHALCOGENIDES; ELECTROLYTES; METAL
AB Programmable metallization cell (PMC) devices work by growing and dissolving a conducting metallic bridge across a chalcogenide glass (ChG) solid electrolyte, which changes the resistance of the cell. PMC operation relies on the incorporation of metal ions in the ChG films via photo-doping to lower the off-state resistance and stabilize resistive switching, and subsequent transport of these ions by electric fields induced from an externally applied bias. In this paper, the static on- and off-state resistance of a PMC device composed of a layered (Ag-rich/Ag-poor) Ge30Se70 ChG film with active Ag and inert Ni electrodes is characterized and modeled using three dimensional simulation code. Calibrating the model to experimental data enables the extraction of device parameters such as material bandgaps, workfuncdons, density of states, carrier mobilities, dielectric constants, and affinities. Published by Elsevier Ltd.
C1 [Rajabi, S.; Saremi, M.; Barnaby, H. J.; Kozicki, M. N.; Mahalanabis, D.; Gonzalez-Velo, Y.; Mahmud, A.] Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
[Edwards, A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Mitkova, M.] Boise State Univ, Dept Elect & Comp Engn, Boise, ID 83725 USA.
RP Rajabi, S (reprint author), Arizona State Univ, Goldwater Ctr, Sch Elect Comp & Energy Engn, Room 317,650 E Tyler Mall,POB 878406, Tempe, AZ 85287 USA.
EM srajabi@asu.edu
RI Gonzalez Velo, Yago/L-6505-2015;
OI Gonzalez Velo, Yago/0000-0003-0113-0408; Saremi,
Mehdi/0000-0001-5041-5886
FU Defense Threat Reduction Agency [HDTRA1-11-1-0055]; NSF I/UCRC Center
for Embedded Systems (NSF) [0856090]; Air Force Research Laboratory Det
8/RVKVE [FA9452-13-1-0288]
FX This work was funded in part by the Defense Threat Reduction Agency
under Grant No. HDTRA1-11-1-0055, the NSF I/UCRC Center for Embedded
Systems (NSF Award No. 0856090) and Air Force Research Laboratory Det
8/RVKVE under Grant No. FA9452-13-1-0288. The authors would like to
thank Dr. James Reed of DTRA for his support of this work.
NR 42
TC 11
Z9 12
U1 3
U2 29
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1101
EI 1879-2405
J9 SOLID STATE ELECTRON
JI Solid-State Electron.
PD APR
PY 2015
VL 106
BP 27
EP 33
DI 10.1016/j.sse.2014.12.019
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied; Physics,
Condensed Matter
SC Engineering; Physics
GA CF7OV
UT WOS:000352747100004
ER
PT J
AU Parco, JE
Levy, DA
Spears, SR
AF Parco, James E.
Levy, David A.
Spears, Sarah R.
TI Transgender Military Personnel in the Post-DADT Repeal Era: A
Phenomenological Study
SO ARMED FORCES & SOCIETY
LA English
DT Article
DE transgender; LGBT; gender dysphoria; phenomenology; military
ID DONT TELL; POLICY; ASK
AB This study is the first to systematically inquire into the lives of transgender men and women currently serving across the branches of the US military in the post-Don't Ask, Don't Tell (DADT) repeal era. We employed an interview protocol from a stratified convenience sample (n = 14) of clandestinely serving active duty, guard and reserve military members from the US Army, Navy, Air Force, and Marine Corps who self-identified as transgender or transsexual. Using phenomenology as a methodological foundation, we present a revelatory case study based on lived experiences from firsthand accounts furthering the collective understanding of gender dysphoria in a contemporary military context.
C1 [Parco, James E.] Colorado Coll, Dept Econ & Business, Colorado Springs, CO 80903 USA.
[Levy, David A.] US Air Force Acad, Dept Management, Colorado Springs, CO 80840 USA.
[Spears, Sarah R.] Amer Civil Liberties Union Colorado, Denver, CO USA.
RP Parco, JE (reprint author), Dept Econ & Business, 14 E Cache La Poudre St, Colorado Springs, CO 80903 USA.
EM jim.parco@coloradocollege.edu
FU Palm Center's Transgender Military Initiative; Social Science Division
at Colorado College
FX The authors disclosed receipt of the following financial support for the
research, authorship, and/or publication of this article: This research
was graciously supported by grants from both the Palm Center's
Transgender Military Initiative and the Social Science Division at
Colorado College.
NR 30
TC 4
Z9 4
U1 2
U2 13
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0095-327X
EI 1556-0848
J9 ARMED FORCES SOC
JI Armed Forces Soc.
PD APR
PY 2015
VL 41
IS 2
BP 221
EP 242
DI 10.1177/0095327X14530112
PG 22
WC Political Science; Sociology
SC Government & Law; Sociology
GA CE1TN
UT WOS:000351595000002
ER
PT J
AU Rankin, BA
Ihme, M
Gore, JP
AF Rankin, Brent A.
Ihme, Matthias
Gore, Jay P.
TI Quantitative model-based imaging of mid-infrared radiation from a
turbulent nonpremixed jet flame and plume
SO COMBUSTION AND FLAME
LA English
DT Article
DE Turbulent nonpremixed flame; Flame radiation; Buoyancy; Large eddy
simulations; Non-intrusive measurements; Infrared imaging
ID LAMINAR DIFFUSION FLAMES; LARGE-EDDY SIMULATIONS; SPECTRAL RADIATION;
PREMIXED FLAMES; HEAT-TRANSFER; FLOWS; METHANE
AB Current understanding of turbulent reacting flows can be improved by novel quantitative comparisons using highly scalable visualization methods based on volume rendering of time-dependent mid-infrared intensities in the form of images with multiple view angles. In this work, the effects of radiation and buoyancy in a turbulent nonpremixed flame and plume are studied by quantitatively comparing measured and computed images of the mid-infrared radiation intensity. To this end, a turbulent nonpremixed jet flame (Reynolds number 15,200 and CH4/H-2/N-2 fuel composition) is considered, representing a benchmark flame configuration of the International Workshop on Measurement and Computation of Turbulent Nonpremixed Flames (TNF Workshop). Quantitative images of the radiation intensity from the flame are acquired using a calibrated high-speed mid-infrared camera and band-pass filters. The camera and filters enable time-dependent measurements of radiation from water vapor and carbon dioxide over the entire flame length and beyond. Results of the solution to the radiative transfer equation are rendered in the form of images using scalar values from large eddy simulations (LES) and a narrowband radiation model. Planar images obtained from experiments and simulations for the radiation intensity display qualitatively comparable features, including localized regions of high and low intensity that are characteristic of turbulent flames. The quantitative comparison of the measured and computed temperature profiles and radiation intensities, particularly in the plume region downstream of the stoichiometric flame length, indicate that including radiation heat loss is important even for weakly radiating flames. The results demonstrate that quantitative experimental and model-based imaging of mid-infrared radiation intensity is useful for assessing the results of narrowband radiation and combustion models. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Rankin, Brent A.; Gore, Jay P.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
[Rankin, Brent A.] US Air Force, Res Lab, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
[Ihme, Matthias] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
RP Rankin, BA (reprint author), 1790 Loop Rd, Wright Patterson AFB, OH 45433 USA.
EM brent.rankin.ctr@us.af.mil
RI Rankin, Brent/A-1598-2017
OI Rankin, Brent/0000-0002-5967-9527
FU Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
FX The authors thank Dr. Robert Barlow and Dr. Gaetano Magnotti for
collaborating on the radiation intensity measurements of the turbulent
nonpremixed flame acquired at the Sandia National Laboratories
Combustion Research Facility. Computational simulations were performed
using resources of the National Energy Research Scientific Computing
Center, which is supported by the Office of Science of the U.S.
Department of Energy under Contract No. DE-AC02-05CH11231.
NR 41
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U1 1
U2 17
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD APR
PY 2015
VL 162
IS 4
BP 1275
EP 1283
DI 10.1016/j.combustflame.2014.10.019
PG 9
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA CE4IK
UT WOS:000351794100032
ER
PT J
AU Gocha, TP
Ingvoldstad, ME
Kolatorowicz, A
Cosgriff-Hernandez, MTJ
Sciulli, PW
AF Gocha, Timothy P.
Ingvoldstad, Megan E.
Kolatorowicz, Adam
Cosgriff-Hernandez, Meghan-Tomasita J.
Sciulli, Paul W.
TI Testing the applicability of six macroscopic skeletal aging techniques
on a modern Southeast Asian sample
SO FORENSIC SCIENCE INTERNATIONAL
LA English
DT Article
DE Forensic anthropology population data; Forensic anthropology; Skeletal
age estimation; Human aging variability; Conditional probability;
Southeast Asia
ID AURICULAR SURFACE; AGE ESTIMATION; REVISED METHOD; PHASE-ANALYSIS;
OS-PUBIS; DEATH; ILIUM; RIB
AB Most macroscopic skeletal aging techniques used by forensic anthropologists have been developed and tested only on reference material from western populations. This study examined the performance of six aging techniques on a known age sample of 88 Southeast Asian individuals. Methods examined included the Suchey-Brooks method of aging the symphyseal face of the os pubis (Brooks and Suchey, Hum. Evol. 5 (1990) 227), Buckberry and Chamberlain's, Am. J. Phys. Anthropol. 119 (2002) 231 and Osborne et al.'s, J. Forensic Sci. 49 (2004) 1 revisions of the Lovejoy et al., Am. J. Phys. Anthropol. 68 (1985) 15 method of aging the auricular surface of the ilium, Iscan et al.'s, J. Forensic Sci. 29 (1984) 1094, Iscan et al.'s, J. Forensic Sci. 30 (1985) 853 method of aging the sternal end of the fourth rib, and Meindl and Lovejoy's, Am. J. Phys. Anthropol. 68 (1985) 57 methods for aging both lateral-anterior and vault sutures on the cranium. The results of this study indicate that application of aging techniques commonly used in forensic anthropology to individuals identified as Asian, and more specifically Southeast Asian, should not be undertaken injudiciously. Of the six individual methods tested here, the Suchey-Brooks pubic symphysis aging method performs best, though average age estimates were still off by nearly 10 years or greater. Methods for aging the auricular surface perform next best, though the Osborne et al. method works better for individuals below 50 years and the Buckberry and Chamberlain method works better for those above 50 years. Methods for age estimation from the sternal ends of the fourth rib and vault and lateral-anterior cranial sutures perform poorly and are not recommended for use on remains of Southeast Asian ancestry. Combining age estimates from multiple indicators, specifically the pubic symphysis and one auricular surface method, was superior to individual methods. Data and a worked example are provided for calculating the conditional probability that an individual belongs to a particular age decade, though overall age estimates may still be broad. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
C1 [Gocha, Timothy P.; Kolatorowicz, Adam; Sciulli, Paul W.] Ohio State Univ, Dept Anthropol, Columbus, OH 43210 USA.
[Gocha, Timothy P.] Ohio State Univ, Div Anat, Columbus, OH 43210 USA.
[Ingvoldstad, Megan E.; Cosgriff-Hernandez, Meghan-Tomasita J.] Joint POW MIA Accounting Command, Cent Identificat Lab, Hickam Afb, HI 96853 USA.
RP Gocha, TP (reprint author), Ohio State Univ, Dept Anthropol, 4034 Smith Lab,174 W 18th Ave, Columbus, OH 43210 USA.
EM gocha.3@osu.edu
OI Gocha, Timothy/0000-0003-0582-8328
FU JPAC/CIL Forensic Science Academy; Student Research Participation
Program at the Joint POW/MIA Accounting Command/Central Identification
Laboratory
FX The authors would like to acknowledge the individuals, known in Thai as
"Ajarn Yai'' and meaning "Great Teacher,'' who graciously donated their
remains to Khon Kaen University and made this project possible.
Additional thanks to Professor and Dr. Panya Tuamsuk of the Department
of Anatomy at the Khon Kaen University Medical School for kindly
providing access to the skeletal material in this study. Thanks also to
Dr. Robert Mann and all of the support provided by the JPAC/CIL Forensic
Science Academy, and also Dr. Mark Hubbe for suggestions and comments on
the manuscript. This research was supported in part by an appointment to
the Student Research Participation Program at the Joint POW/MIA
Accounting Command/Central Identification Laboratory administered by the
Oak Ridge Institute for Science and Education through an interagency
agreement between the U.S. Department of Energy and JPAC/CIL.
NR 21
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U1 3
U2 9
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0379-0738
EI 1872-6283
J9 FORENSIC SCI INT
JI Forensic Sci.Int.
PD APR
PY 2015
VL 249
DI 10.1016/j.forsciint.2014.12.015
PG 7
WC Medicine, Legal
SC Legal Medicine
GA CE6LG
UT WOS:000351947300048
ER
PT J
AU Hill, EM
Sky, K
Sit, M
Collamer, A
Higgs, J
AF Hill, Erica M.
Sky, Karen
Sit, Michelle
Collamer, Angelique
Higgs, Jay
TI Does Starting Allopurinol Prolong Acute Treated Gout? A Randomized
Clinical Trial
SO JCR-JOURNAL OF CLINICAL RHEUMATOLOGY
LA English
DT Article
DE Gout; crystal; allopurinol
ID UPDATED GUIDELINES; HYPERURICEMIA; HEALTH
AB Background: Traditionally, allopurinol is not initiated during an acute gout attack to avoid prolonging the painful arthritis. The 2012 American College of Rheumatology Guidelines for the Management of Gout suggest that urate-lowering therapy can be started during an acute attack, based on "consensus opinion of experts, case studies, or standard of care."
Objective: The aim of this study was to determine whether initiating allopurinol will adversely affect the resolution of acute, treated gout.
Methods: We conducted a 28-day, placebo-controlled, double-blind study of allopurinol initiation in patients with acute gout. Patients with crystal-proven gout by arthrocentesis were enrolled if they presented to the rheumatology clinic with an acute gout attack within 72 hours from initial therapy. The patients were also required to meet at least 1 additional criterion for urate-lowering therapy including (1) the presence of gouty tophi, (2) more than 1 acute gout attack per year, (3) a history of nephrolithiasis, or (4) urate overproduction (>1000 mg in 24-hour urine collection). Patients were excluded from the study if they had a glomerular filtration rate of less than 50 or liver function test of greater than 1.25 times the upper limit of normal. The treating physician determined therapy for the acute gout attack. Standard prophylaxis, with colchicine or nonsteroidal anti-inflammatory drugs, was prescribed. Allopurinol or placebo was initiated at 100 mg daily for the first 14 days and then increased to 200 mg daily for the next 14 days. The primary end point was protocol defined days to resolution of acute gout, incorporating patient-rated joint pain and physician examination. Secondary measures included Physician Global Assessment, patient-rated pain, adverse effects of therapy, and serum uric acid.
Results: Thirty-one patients (17 on placebo, 14 on allopurinol) completed the study. Both intent-to-treat and completer analyses showed only a statistically insignificant difference in days to resolution (15.4 days in the allopurinol group completers vs 13.4 days in the placebo group; P = 0.5). The secondary measures revealed that the acute phase of pain rapidly improved in both groups.
Conclusions: We initiated allopurinol at low doses during an acute gout attack in patients who met criteria for starting urate-lowering therapy and did not have abnormal kidney or liver function. In this cohort, allopurinol did not prolong the acute, treated attack.
C1 [Hill, Erica M.; Higgs, Jay] San Antonio Mil Med Ctr, San Antonio, TX USA.
[Sky, Karen] Alaska Vet Affairs Healthcare Syst, Anchorage, AK USA.
[Sit, Michelle] David Grant US Air Force Med Ctr, Fairfield, CA USA.
[Collamer, Angelique] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Hill, EM (reprint author), JBSA Ft Sam, 3851 Roger Brooke Dr, Houston, TX 78234 USA.
EM Erica.m.hill.mil@mail.mil
NR 13
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Z9 6
U1 4
U2 11
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 1076-1608
EI 1536-7355
J9 JCR-J CLIN RHEUMATOL
JI JCR-J. Clin. Rheumatol.
PD APR
PY 2015
VL 21
IS 3
BP 120
EP 125
DI 10.1097/RHU.0000000000000235
PG 6
WC Rheumatology
SC Rheumatology
GA CE5PO
UT WOS:000351887800002
PM 25807090
ER
PT J
AU Stevans, JM
Bise, CG
Mcgee, JC
Miller, DL
Rockar, P
Delitto, A
AF Stevans, Joel M.
Bise, Christopher G.
Mcgee, John C.
Miller, Debora L.
Rockar, Paul, Jr.
Delitto, Anthony
TI Evidence-Based Practice Implementation: Case Report of the Evolution of
a Quality Improvement Program in a Multicenter Physical Therapy
Organization
SO PHYSICAL THERAPY
LA English
DT Article
ID LOW-BACK-PAIN; ALBERTA CONTEXT TOOL; HEALTH-CARE; GUIDELINES; SCIENCE;
TRANSLATION; STRATEGIES; ADHERENCE; FRAMEWORK; ATTITUDES
AB Background and Purpose. Our nation's suboptimal health care quality and unsustainable costs can be linked to the failure to implement evidence-based interventions. Implementation is the bridge between the decision to adopt a strategy and its sustained use in practice. The purpose of this case report is threefold: (1) to outline the historical implementation of an evidence-based quality improvement project, (2) to describe the program's future direction using a systems perspective to identify implementation barriers, and (3) to provide implications for the profession as it works toward closing the evidence-to-practice gap.
Case Description. The University of Pittsburgh Medical Center (UPMC) Centers for Rehab Services is a large, multicenter physical therapy organization. In 2005, they implemented a Low Back Initiative utilizing evidence-based protocols to guide clinical decision making.
Outcomes. The initial implementation strategy used a multifaceted approach. Formative evaluations were used repeatedly to identify barriers to implementation. Barriers may exist outside the organization, they can be created internally, they may result from personnel, or they may be a direct function of the research evidence. Since the program launch, 3 distinct improvement cycles have been utilized to address identified implementation barriers.
Discussion. Implementation is an iterative process requiring evaluation, measurement, and refinement. During this period, behavior change is actualized as clinicians become increasingly proficient and committed to their use of new evidence. Successfully incorporating evidence into routine practice requires a systems perspective to account for the complexity of the clinical setting. The value the profession provides can be enhanced by improving the implementation of evidence-based strategies. Achieving this outcome will require a concerted effort in all areas of the profession. New skills will be needed by leaders, researchers, managers, and clinicians.
C1 [Stevans, Joel M.; Bise, Christopher G.; Miller, Debora L.; Delitto, Anthony] Univ Pittsburgh, Dept Phys Therapy, Pittsburgh, PA 15219 USA.
[Mcgee, John C.] US Air Force Acad, Dept Biol, Colorado Springs, CO 80840 USA.
[Miller, Debora L.; Rockar, Paul, Jr.; Delitto, Anthony] UPMC, Ctr Rehab Serv, Pittsburgh, PA USA.
RP Stevans, JM (reprint author), Univ Pittsburgh, Dept Phys Therapy, 100 Technol Dr,Ste 210, Pittsburgh, PA 15219 USA.
EM jms363@pitt.edu
OI Stevans, Joel/0000-0001-8642-9446
NR 35
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U1 3
U2 7
PU AMER PHYSICAL THERAPY ASSOC
PI ALEXANDRIA
PA 1111 N FAIRFAX ST, ALEXANDRIA, VA 22314 USA
SN 0031-9023
EI 1538-6724
J9 PHYS THER
JI Phys. Ther.
PD APR
PY 2015
VL 95
IS 4
BP 588
EP 599
DI 10.2522/ptj.20130541
PG 12
WC Orthopedics; Rehabilitation
SC Orthopedics; Rehabilitation
GA CE8VE
UT WOS:000352121400010
PM 25573756
ER
PT J
AU Murphy, KD
McCartney, JS
Henry, KS
AF Murphy, Kyle D.
McCartney, John S.
Henry, Karen S.
TI Evaluation of thermo-mechanical and thermal behavior of full-scale
energy foundations
SO ACTA GEOTECHNICA
LA English
DT Article
DE Deep foundations; Geothermal heat exchange; Thermal response test;
Thermo-mechanical behavior
ID PILE; PERFORMANCE
AB Eight full-scale energy foundations were constructed for a new building at the US Air Force Academy. The foundations are being used to demonstrate this technology to the United States Department of Defense and have several experimental features in order to study their thermal-mechanical behavior. Three of the foundations are instrumented with strain gages and thermistors, and their thermo-mechanical response during a heating and cooling test was evaluated. For a temperature increase of 18 degrees C, the maximum thermal axial stress ranged from 4.0 to 5.1 MPa, which is approximately 25 % of the compressive strength of concrete (estimated at 21 MPa), and the maximum upward displacement ranged from 1.4 to 1.7 mm, which should not cause angular distortions sufficient enough to cause structural or aesthetic damage of the building. The end restraint provided by the building was observed to change depending on the location of the foundation. The heat flux per meter was measured by evaluating the temperatures and flow rates of a heat exchanger fluid entering and exiting the foundations. The heat flux values were consistent with those in the literature, and the foundation with the three continuous heat exchanger loops was found to have the greatest heat flux per meter. The transient thermal conductivity of the subsurface measured using the temperatures of the subsurface surrounding the foundation ranged from 2.0 to 2.3 W/mK, which is consistent with results from thermal response tests on energy foundations reported in the literature.
C1 [Murphy, Kyle D.; McCartney, John S.] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
[Henry, Karen S.] US Air Force Acad, Dept Civil Engn, Colorado Springs, CO 80840 USA.
RP McCartney, JS (reprint author), Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
EM kyle.murphy@colorado.edu; john.mccartney@colorado.edu;
karen.henry@usafa.edu
FU DoD ESTCP project [EW-201153]
FX Support from DoD ESTCP project EW-201153 is gratefully acknowledged, as
are the contributions of the 819th Air Force RED HORSE Squadron, who
provided support for the heating test. The views in the paper are those
of the authors alone.
NR 30
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U1 4
U2 18
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1861-1125
EI 1861-1133
J9 ACTA GEOTECH
JI Acta Geotech.
PD APR
PY 2015
VL 10
IS 2
BP 179
EP 195
DI 10.1007/s11440-013-0298-4
PG 17
WC Engineering, Geological
SC Engineering
GA CE0UC
UT WOS:000351521500001
ER
PT J
AU Juliano, TJ
Borg, MP
Schneider, SP
AF Juliano, Thomas J.
Borg, Matthew P.
Schneider, Steven P.
TI Quiet Tunnel Measurements of HIFiRE-5 Boundary-Layer Transition
SO AIAA JOURNAL
LA English
DT Article
ID LAMINAR-TURBULENT TRANSITION; HEAT-FLUX MEASUREMENTS; AERODYNAMIC NOISE;
ELLIPTIC CONE; WIND TUNNELS; FLOW; ROUGHNESS; STABILITY
AB The Hypersonic International Flight Research Experimentation (HIFiRE) program is a hypersonic flight test program executed by the Air Force Research Laboratory and Australian Defence Science and Technology Organisation. The principal goal of HIFiRE flight five is to measure hypersonic boundary-layer transition on a three-dimensional body. The HIFiRE flight tests are supported by a ground test campaign; this paper presents measurements of heat flux and boundary-layer transition in the Boeing/AFOSR Mach-6 Quiet Tunnel. This facility has been developed to provide quiet flow at high Reynolds number, with low noise levels comparable to flight. This tunnel's good optical access enabled global measurement of the heat flux by means of temperature-sensitive paint. Two modes of transition were observed: transition along the centerline, suspected to arise from the amplification of second-mode waves in the boundary layer, and transition roughly halfway between the centerline and leading edges, probably due to the breakdown of crossflow vortices. Reducing the noise level from conventional to quiet substantially delayed both transition modes. Increasing the angle of attack from 0 to 4deg delayed the crossflow transition mode on the windward side. Transition moved forward as freestream unit Reynolds number increased from 2.6.10(6)/m to 11.9.10(6)/m.
C1 [Juliano, Thomas J.; Borg, Matthew P.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Schneider, Steven P.] Purdue Univ, W Lafayette, IN 47907 USA.
RP Juliano, TJ (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RI Juliano, Thomas/A-8153-2015
OI Juliano, Thomas/0000-0002-9362-6007
FU AFOSR [FA9550-09-1-0191]; National Research Council Research
Associateship Award at the U.S. Air Force Research Laboratory.
FX Thanks to Meelan Choudhari and Jeff White of the NASA Langley
Computational Aerosciences Branch for providing the results of their CFD
analysis. Roger Kimmel suggested numerous improvements for the paper.
Shann Rufer aided the interpretation of the NASA Langley results. Joseph
Jewell calculated Rekk from the CFD results. This project was funded by
the AFOSR under grant FA9550-09-1-0191 supervised by John Schmisseur.
Final data analysis was performed while Dr. Juliano held a National
Research Council Research Associateship Award at the U.S. Air Force
Research Laboratory. This material has been cleared for public release.
Case Number 88ABW-2014-3908.
NR 31
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U1 2
U2 19
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD APR
PY 2015
VL 53
IS 4
BP 832
EP 846
DI 10.2514/1.J053189
PG 15
WC Engineering, Aerospace
SC Engineering
GA CE0BF
UT WOS:000351466300003
ER
PT J
AU Serres, JL
Fouts, BL
Dukes, SF
Maupin, GM
Wade, ME
AF Serres, Jennifer L.
Fouts, Brittany L.
Dukes, Susan F.
Maupin, Genny M.
Wade, Molly E.
TI Records Review of Musculoskeletal Injuries in Aeromedical Evacuation
Personnel
SO AMERICAN JOURNAL OF PREVENTIVE MEDICINE
LA English
DT Review
ID HEALTH-CARE WORKERS; PREVENTING HYPOTHERMIA; MILITARY PERSONNEL;
HEMORRHAGIC-SHOCK; DISORDERS; AIRCREW; RISK; AIR
AB Background: Aeromedical evacuation providers care for patients during air transport. By applying standard medical practices, oftentimes developed for ground care, these practitioners perform their mission duties under additional physical stress in this unique medical environment. Awkward postures and excessive forces are common occurrences among personnel operating in this domain. Additionally, anecdotal reports highlight the risk of developing musculoskeletal injuries for these providers. Currently, there is limited research focusing on musculoskeletal injuries in aeromedical evacuation providers.
Purpose: To determine the prevalence of musculoskeletal injuries and associated symptoms in aeromedical evacuation providers to understand the risk and burden of these injuries to military personnel.
Methods: This study utilized a retrospective review of military medical records containing ICD-9 codes to investigate the incidence of musculoskeletal injuries within flight nurses and medical technicians compared to their non-flying counterparts from 2006 through 2011. Data were analyzed from 2013 through 2014.
Results: Although musculoskeletal injuries were identified within the test populations, results showed fewer injuries for aeromedical evacuation populations compared to non-aeromedical evacuation counterparts.
Conclusions: One contributing factor may be a potential under-reporting of musculoskeletal injuries resulting from the fear of being placed on limited flying status. As flyers, aeromedical evacuation personnel must undergo yearly medical examinations and complete training courses that emphasize proper lifting techniques and physical requirements necessary for the safe and efficient transport of patients on various platforms. These additional requirements may create a healthy worker effect, likely contributing to lower musculoskeletal injuries. Published by Elsevier Inc. on behalf of American Journal of Preventive Medicine
C1 [Serres, Jennifer L.; Dukes, Susan F.; Maupin, Genny M.] US Air Force, Sch Aerosp Med, Dept Aeromed Res, Dayton, OH 45433 USA.
[Fouts, Brittany L.] Oak Ridge Inst Sci & Educ, Dayton, OH 45433 USA.
[Wade, Molly E.] Peerless Technol Corp, Dayton, OH 45433 USA.
RP Fouts, BL (reprint author), 2510 5th St,Bldg 840, Dayton, OH 45433 USA.
EM brittany.fouts.ctr@us.af.mil
FU Department of the Air Force, 711th Human Performance Wing, Defense
Health Program; appointment to the Student Research Participation
Program at the U.S. Air Force Research Laboratory, 711th Human
Performance Wing
FX This work was funded by the Department of the Air Force, 711th Human
Performance Wing, Defense Health Program. This research was supported in
part by an appointment to the Student Research Participation Program at
the U.S. Air Force Research Laboratory, 711th Human Performance Wing,
administered by the Oak Ridge Institute for Science and Education
through an interagency agreement between the U.S. Department of Energy
and the U.S. Air Force Research Laboratory. The views expressed in this
article are those of the authors and do not necessarily reflect the
official policy or position of the Air Force, the Department of Defense,
or the U.S. Government.
NR 32
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U1 1
U2 5
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0749-3797
EI 1873-2607
J9 AM J PREV MED
JI Am. J. Prev. Med.
PD APR
PY 2015
VL 48
IS 4
BP 365
EP 371
DI 10.1016/j.amepre.2014.10.017
PG 7
WC Public, Environmental & Occupational Health; Medicine, General &
Internal
SC Public, Environmental & Occupational Health; General & Internal Medicine
GA CD7DM
UT WOS:000351251000001
PM 25704648
ER
PT J
AU Grissom, TE
Fang, R
AF Grissom, Thomas E.
Fang, Raymond
TI Topical hemostatic agents and dressings in the prehospital setting
SO CURRENT OPINION IN ANESTHESIOLOGY
LA English
DT Review
DE chitosan; emergency medical services; hemorrhage; hemostatics; military
medicine
ID EXTREMITY ARTERIAL HEMORRHAGE; COMBAT CASUALTY CARE; SELF-EXPANDING
FOAM; LETHAL GROIN INJURY; SWINE MODEL; UNCONTROLLED HEMORRHAGE;
PENETRATING TRAUMA; HEPATIC INJURIES; MRDH BANDAGE; BLOOD-LOSS
AB Purpose of review
Death from exsanguinating hemorrhage remains a priority in the management of combat casualties and civilian trauma patients with truncal and junctional injuries. Appropriate use of hemostatic agents and dressings in the prehospital setting may allow for earlier control and an improved survival rate.
Recent findings
Third-generation chitosan-based hemostatic agents and dressings appear to be equally efficacious to the dressing currently deployed by the US military forces in the management of hemorrhage not amenable to tourniquet placement. Unfortunately, a lack of clinical trials places a heavy reliance on anecdotal reports and laboratory studies in agent selection and application.
Summary
Efficacy of currently available hemostatic agents and dressings appears to have plateaued in recent years although new agents and delivery mechanisms under development may improve control in cases of severe hemorrhage.
C1 [Grissom, Thomas E.] Univ Maryland, Dept Anesthesiol, Sch Med, R Adams Cowley Shock Trauma Ctr, Baltimore, MD 21201 USA.
[Fang, Raymond] US Air Force, Ctr Sustainment Trauma & Readiness Skills, R Adams Cowley Shock Trauma Ctr, Baltimore, MD USA.
RP Grissom, TE (reprint author), R Adams Cowley Shock Trauma Ctr, Ste T1R77,22 S Greene St, Baltimore, MD 21201 USA.
EM tgrissom@umm.edu
NR 64
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Z9 2
U1 4
U2 31
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0952-7907
EI 1473-6500
J9 CURR OPIN ANESTHESIO
JI Curr. Opin. Anesthesiol.
PD APR
PY 2015
VL 28
IS 2
BP 210
EP 216
DI 10.1097/ACO.0000000000000166
PG 7
WC Anesthesiology
SC Anesthesiology
GA CD8EX
UT WOS:000351329100015
PM 25674988
ER
PT J
AU Banerjee, T
Sahni, S
Seetharaman, G
AF Banerjee, Tania
Sahni, Sartaj
Seetharaman, Gunasekaran
TI PC-TRIO: A Power Efficient TCAM Architecture for Packet Classifiers
SO IEEE TRANSACTIONS ON COMPUTERS
LA English
DT Article
DE Packet classifier; incremental updates; power; TCAM
ID MULTIBIT TRIES; ROUTING TABLES; CLASSIFICATION; ALGORITHM; DELAY
AB PC-TRIO is an indexed TCAM architecture for packet classification. In addition to index TCAMs, PC-TRIO uses wide SRAM words. On our packet classifier data sets, PC-TRIO reduced TCAM power by 96 percent and lookup time by 98 percent on an average, compared to PC-DUOS+ [28] that does not use indexing or wide SRAMs. PC-DUOS+ was shown to be better than STCAM, which is a single TCAM architecture conventionally used for packet classification [28]. In this paper, we also extend PC-DUOS+ by augmenting it with wide SRAMs and index TCAMs using the same methodology as used in PC-TRIO, to obtain PC-DUOS+W. On ACL data sets, PCDUOS+W reduced TCAM power by 86 percent and lookup time by 98 percent, compared to PC-DUOS+, which demonstrates the effectiveness of indexing and usage of wide SRAMs in reducing power and lookup time for packet classifiers.
C1 [Banerjee, Tania; Sahni, Sartaj] Univ Florida, Dept Comp & Informat Sci & Engn, Gainesville, FL 32611 USA.
[Seetharaman, Gunasekaran] AFRL RITB, Dept Informat Directorate, Air Force Res Lab, Rome, NY USA.
RP Banerjee, T (reprint author), Univ Florida, Dept Comp & Informat Sci & Engn, Gainesville, FL 32611 USA.
EM tmishra@cise.ufl.edu; sahni@cise.ufl.edu;
Gunasekaran.Seetharaman@rl.af.mil
FU AFRL [FA8750-10-1-0236]
FX This material was based upon work funded by AFRL, under AFRL Contract
No. FA8750-10-1-0236. (b) Any opinions, findings and conclusions or
recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the views of AFRL. Approved for public
release: (88ABW-2011-4143).
NR 35
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Z9 3
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0018-9340
EI 1557-9956
J9 IEEE T COMPUT
JI IEEE Trans. Comput.
PD APR
PY 2015
VL 64
IS 4
BP 1104
EP 1118
DI 10.1109/TC.2014.2315645
PG 15
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA CD9YW
UT WOS:000351458800016
ER
PT J
AU Christ, JA
Heiderscheidt, JL
Pickenpaugh, MY
Phelan, TJ
Pocock, JB
Stanford, MS
Seely, GE
Suermann, PC
Twesme, TM
AF Christ, John A.
Heiderscheidt, Jeffrey L.
Pickenpaugh, Monica Y.
Phelan, Thomas J.
Pocock, James B.
Stanford, Matthew S.
Seely, Gregory E.
Suermann, Patrick C.
Twesme, Troy M.
TI Incorporating Sustainability and Green Engineering into a Constrained
Civil Engineering Curriculum
SO JOURNAL OF PROFESSIONAL ISSUES IN ENGINEERING EDUCATION AND PRACTICE
LA English
DT Article
ID EDUCATION; SCIENCE; PROGRAM; COURSES; DESIGN
AB Revised Bodies of Knowledge, constituent input, and student demand are motivating the incorporation of sustainability concepts in traditional engineering curricula. While a variety of methods are in development, ranging from introductory engineering courses to capstone experiences to graduate-level treatment, the addition of new topics in an already constrained curriculum is creating a dilemma for many engineering programs. This work presents an example of how sustainability concepts were incorporated in a traditional civil engineering program administered within a constrained four-year curriculum. Using a variety of the treatments recommended in the literature, United States Air Force Academy civil and environmental engineering students learn and apply sustainability concepts at multiple points and in various frameworks during their four-year programs. Student feedback coupled with learning assessments suggest this framework may provide a more generally applicable model for incorporating sustainability concepts within engineering curricula, with particular focus on the civil and environmental engineering disciplines. (C) 2014 American Society of Civil Engineers.
C1 [Christ, John A.; Heiderscheidt, Jeffrey L.; Pickenpaugh, Monica Y.; Phelan, Thomas J.; Pocock, James B.; Stanford, Matthew S.; Seely, Gregory E.; Suermann, Patrick C.; Twesme, Troy M.] USAF Acad, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
RP Christ, JA (reprint author), USAF Acad, Dept Civil & Environm Engn, 2354 Fairchild Dr,Suite 6J-159, Colorado Springs, CO 80840 USA.
EM john.christ@usafa.edu; jeffrey.heiderscheidt@usafa.edu;
monica.pickenpaugh@usafa.edu; thomas.phelan@usafa.edu;
james.pocock@usafa.edu; matthew.stanford@usafa.edu;
gregory.seely@usafa.edu; patrick.suermann@usafa.edu;
troy.twesme@usafa.edu
RI Phelan, Thomas/H-3089-2013
OI Phelan, Thomas/0000-0003-2270-8416
NR 35
TC 0
Z9 0
U1 1
U2 16
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 1052-3928
EI 1943-5541
J9 J PROF ISS ENG ED PR
JI J. Prof. Issues Eng. Educ. Pract.
PD APR
PY 2015
VL 141
IS 2
SI SI
AR C4014004
DI 10.1061/(ASCE)EI.1943-5541.0000226
PG 8
WC Education, Scientific Disciplines; Engineering, Multidisciplinary
SC Education & Educational Research; Engineering
GA CE0DC
UT WOS:000351473700008
ER
PT J
AU Hoogland, CE
Schurtz, DR
Cooper, CM
Combs, DJY
Brown, EG
Smith, RH
AF Hoogland, Charles E.
Schurtz, D. Ryan
Cooper, Chelsea M.
Combs, David J. Y.
Brown, Edward G.
Smith, Richard H.
TI The joy of pain and the pain of joy: In-group identification predicts
schadenfreude and gluckschmerz following rival groups' fortunes
SO MOTIVATION AND EMOTION
LA English
DT Article
DE Schadenfreude; Emotion; Gluckschmerz; Identity; Intergroup relations;
Pain
ID SOCIAL IDENTITY; INTERGROUP DISCRIMINATION; SELF-EVALUATION; OUT-GROUPS;
ENVY; CATEGORIZATION; PLEASURE; COMPETITION; MISFORTUNE; SYMPATHY
AB Four studies examined how in-group identification in the domain of sports is associated with schadenfreude in reaction to another group's suffering or gluckschmerz in reaction to another group's good fortune. Schadenfreude increased as a function of in-group identification when the outgroup was a rival team rather than a non-rival team in Study 1. Study 2 showed that those who experience schadenfreude at learning of an outgroup player's injury will also tend to feel gluckschmerz when they learn of the player's recovery. Studies 3 and 4 replicated and extended these findings for both schadenfreude and gluckschmerz, and showed that neither the degree of severity of an injury nor the level of physical pain associated with the injury moderated the link between identification and both schadenfreude and gluckschmerz. Mediation analyses indicated that perceived in-group gain or loss, deservedness, and dislike were prime mediators of links between in-group identification and both emotions.
C1 [Hoogland, Charles E.; Cooper, Chelsea M.; Smith, Richard H.] Univ Kentucky, Dept Psychol, Lexington, KY 40506 USA.
[Schurtz, D. Ryan] Stevenson Univ, Dept Psychol, Stevenson, MD 21153 USA.
[Cooper, Chelsea M.] US Air Force, Wright Patterson AFB, OH 45433 USA.
[Combs, David J. Y.] US Navy, Alexandria, VA 22305 USA.
[Brown, Edward G.] Univ Kentucky, Dept Psychol, Lexington, KY 40502 USA.
RP Hoogland, CE (reprint author), Univ Kentucky, Dept Psychol, 0003 Kastle Hall, Lexington, KY 40506 USA.
EM charles.hoogland@uky.edu; dschurtz@stevenson.edu;
chelseacooper2011@gmail.com; david.combs@nrl.navy.mil;
edwardbrown@uky.edu; richard.h.smith@uky.edu
NR 48
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Z9 3
U1 13
U2 30
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0146-7239
EI 1573-6644
J9 MOTIV EMOTION
JI Motiv. Emot.
PD APR
PY 2015
VL 39
IS 2
BP 260
EP 281
DI 10.1007/s11031-014-9447-9
PG 22
WC Psychology, Experimental; Psychology, Social
SC Psychology
GA CD6BT
UT WOS:000351174400008
ER
PT J
AU Vogiatzis, C
Veremyev, A
Pasiliao, EL
Pardalos, PM
AF Vogiatzis, Chrysafis
Veremyev, Alexander
Pasiliao, Eduardo L.
Pardalos, Panos M.
TI An integer programming approach for finding the most and the least
central cliques
SO OPTIMIZATION LETTERS
LA English
DT Article
DE Clique; Group centrality; Integer formulation
ID NETWORKS; MODELS; GRAPH; PATH
AB We consider the problem of finding the most and the least "influential" or "influenceable" cliques in graphs based on three classical centrality measures: degree, closeness and betweenness. In addition to standard clique betweenness, which is defined as the proportion of shortest paths between any two graph nodes that pass through the clique, we also consider its optimistic and pessimistic versions, where outside nodes may favor or try to avoid shortest paths passing through the clique, respectively. We discuss the computational complexity issues for these problems and develop linear 0-1 programming formulations for each centrality metric. Finally, we demonstrate the performance of the developed formulations on real-life and synthetic networks, and provide some interesting insights based on the obtained results. In particular, our findings indicate that there are considerable variations between the centrality values of large cliques within the same networks. Moreover, the most central cliques in graphs are not necessarily the largest ones.
C1 [Vogiatzis, Chrysafis; Pardalos, Panos M.] Univ Florida, Dept Ind Syst Engn, Gainesville, FL 32611 USA.
[Veremyev, Alexander; Pasiliao, Eduardo L.] US Air Force, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
RP Vogiatzis, C (reprint author), Univ Florida, Dept Ind Syst Engn, Gainesville, FL 32611 USA.
EM chvogiat@ufl.edu
FU AFRL Mathematical Modeling and Optimization Institute; National Research
Council Research Associateship Award at AFRL
FX This material is based upon work supported by the AFRL Mathematical
Modeling and Optimization Institute. The research was performed while
the second author held a National Research Council Research
Associateship Award at AFRL. The authors would like to thank the
anonymous referees for their constructive comments.
NR 40
TC 2
Z9 2
U1 0
U2 5
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1862-4472
EI 1862-4480
J9 OPTIM LETT
JI Optim. Lett.
PD APR
PY 2015
VL 9
IS 4
BP 615
EP 633
DI 10.1007/s11590-014-0782-2
PG 19
WC Operations Research & Management Science; Mathematics, Applied
SC Operations Research & Management Science; Mathematics
GA CE0TZ
UT WOS:000351520900001
ER
PT J
AU Camburn, B
Otto, K
Jensen, D
Crawford, R
Wood, K
AF Camburn, Bradley
Otto, Kevin
Jensen, Dan
Crawford, Richard
Wood, Kristin
TI Designing biologically inspired leaf structures: computational geometric
transport analysis of volume-to-point flow channels
SO ENGINEERING WITH COMPUTERS
LA English
DT Article
DE Volume-to-point flow; Design; Path length; Geometric analysis;
Biological analogy; Micro-chip cooling
ID TREE-LIKE; MICROCHANNEL NETS; HEAT-TRANSFER; PRESSURE-DROP; NETWORKS;
ANALOGY; MICROREACTOR; EFFICIENCY
AB Many natural systems have inspired the design of engineering artifacts. Example systems include a broad array of products inspired by pseudo-fractal structures found in nature, including bronchial tubes, watersheds, lightning, and leaf veins. Notably, these systems all resolve a volume-to-point flow problem, i.e., diffusive transportation of heat, energy or fluid into a single flow channel from an initial dispersal throughout a substrate volume (coalescence). Flow diffuses slowly throughout the bulk of the substrate medium towards channels. Once in the channels, flow proceeds rapidly towards the sink. These channels are branched and converge at a single point. Several engineering design problems require a volume-to-point flow solution, e.g., the internal conductive cooling of a microchip. This work introduces a novel geometry-based transport analysis, referred to as path length analysis, for evaluating the performance of systems designed for volume-to-point flow. The analysis is inspired by two principles. First, diffusive flow tends to follow the "path of least resistance." Second, the effort required to diffuse material or energy along a path is proportional to the length of the path. Novel channel configurations may be developed using these two principles. These configurations have a pseudo-fractal type structure and are significantly more efficient than the state-of-the-art for cooling problems such as the conductive cooling of a microchip. An extensive finite element analysis confirms the performance for the example of microchip cooling. The primary results include (1) path length optimization leads to high performing structures with a 'natural' appearance, and (2) path length analysis facilitates a new understanding and design tool for analyzing volume-to-point flow problems.
C1 [Camburn, Bradley; Crawford, Richard] Univ Texas Austin, Austin, TX 78712 USA.
[Camburn, Bradley; Otto, Kevin; Wood, Kristin] Singapore Univ Technol & Design, Singapore, Singapore.
[Jensen, Dan] US Air Force Acad, Denver, CO USA.
RP Camburn, B (reprint author), Univ Texas Austin, Austin, TX 78712 USA.
EM bcamburn@gmail.com
FU University of Texas at Austin Department of Mechanical Engineering;
United States Air Force Academy (USAFA); Air Force Research
Laboratories- ARFL-WP; Air Force Research Laboratories- AFRL-RB;
Singapore University of Technology and Design; Massachusetts Institute
of Technology International Design Center- SUTD-MIT IDC; United Sates
Air Force Academy [FA7000-12-2-2005]
FX The University of Texas at Austin Department of Mechanical Engineering,
the United States Air Force Academy (USAFA), the Air Force Research
Laboratories- ARFL-WP, and AFRL-RB, and the Singapore University of
Technology and Design and Massachusetts Institute of Technology
International Design Center- SUTD-MIT IDC
(http://www.sutd.edu.sg/idc.aspx) are acknowledged for their support of
this research. This material is based in part on research sponsored by
the United Sates Air Force Academy under agreement number
FA7000-12-2-2005. The US Government is authorized to reproduce and
distribute reprints for Government purposes notwithstanding any
copyright notation thereon. The views and conclusions contained herein
are those of the authors and should not be interpreted as necessarily
representing the official policies or endorsements, either expressed or
implied, of the United States Air Force Academy, the US government or
any of the other sponsoring agencies.
NR 40
TC 3
Z9 3
U1 5
U2 35
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0177-0667
EI 1435-5663
J9 ENG COMPUT-GERMANY
JI Eng. Comput.
PD APR
PY 2015
VL 31
IS 2
BP 361
EP 374
DI 10.1007/s00366-014-0356-z
PG 14
WC Computer Science, Interdisciplinary Applications; Engineering,
Mechanical
SC Computer Science; Engineering
GA CD6MT
UT WOS:000351203900011
ER
PT J
AU Liu, BY
Chen, YR
Wysocki, B
Huang, TW
AF Liu, Beiye
Chen, Yiran
Wysocki, Bryant
Huang, Tingwen
TI Reconfigurable Neuromorphic Computing System with Memristor-Based
Synapse Design
SO NEURAL PROCESSING LETTERS
LA English
DT Article
DE Bidirectional synapse; Memristor; Hopfield network; Pattern recognition
ID RECURRENT NEURAL-NETWORKS; STABILITY; MEMORY; DELAYS
AB Conventional CMOS technology is slowly approaching its physical limitations and researchers are increasingly utilizing nanotechnology to both extend CMOS capabilities and to explore potential replacements. Novel memristive systems continue to attract growing attention since their reported physical realization by HP in 2008. Unique characteristics like non-volatility, re-configurability, and analog storage properties make memristors a very promising candidate for the realization of artificial neural systems. In this work, we propose a memristor-based design of bidirectional transmission excitation/inhibition synapses and implement a neuromorphic computing system based on our proposed synapse designs. The robustness of our system is also evaluated by considering the actual manufacturing variability with emphasis on process variation.
C1 [Liu, Beiye; Chen, Yiran] Univ Pittsburgh, ECE Dept, Pittsburgh, PA 15260 USA.
[Wysocki, Bryant] US Air Force Res Lab, Rome, NY USA.
[Huang, Tingwen] Texas A&M Univ Qatar, Doha, Qatar.
RP Liu, BY (reprint author), Univ Pittsburgh, ECE Dept, Pittsburgh, PA 15260 USA.
EM bel34@pitt.edu; yic52@pitt.edu; Bryant.Wysocki@rl.af.mil;
tingwen.huang@qatar.tamu.edu
RI Huang, Tingwen/K-1367-2013
OI Huang, Tingwen/0000-0001-9610-846X
FU U.S. Air Force Research Lab (AFRL) [FA8750-11-1-0271]; National Science
Foundation (NSF) [ECCS-1202225, CNS-1253424]
FX This work is supported by U.S. Air Force Research Lab (AFRL) Grant
FA8750-11-1-0271 and National Science Foundation (NSF) Grants
ECCS-1202225 and CNS-1253424 (CAREER).
NR 20
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Z9 1
U1 2
U2 36
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1370-4621
EI 1573-773X
J9 NEURAL PROCESS LETT
JI Neural Process. Lett.
PD APR
PY 2015
VL 41
IS 2
SI SI
BP 159
EP 167
DI 10.1007/s11063-013-9315-8
PG 9
WC Computer Science, Artificial Intelligence
SC Computer Science
GA CD6CH
UT WOS:000351176000002
ER
PT J
AU Vishwakarma, V
Sinha, A
Bhartiya, Y
Brown, JM
AF Vishwakarma, Vinod
Sinha, Alok
Bhartiya, Yasharth
Brown, Jeffery M.
TI Modified Modal Domain Analysis of a Bladed Rotor Using Coordinate
Measurement Machine Data on Geometric Mistuning
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID DISKS
AB Modified modal domain analysis (MMDA), a reduced order modeling technique, is applied to a geometrically mistuned integrally bladed rotor to obtain its natural frequencies, mode shapes, and forced response. The geometric mistuning of blades is described in terms of proper orthogonal decomposition (POD) of the coordinate measurement machine (CMM) data. Results from MMDA are compared to those from the full (360 deg) rotor ANSYS model. It is found that the MMDA can accurately predict natural frequencies, mode shapes, and forced response. The effects of the number of POD features and the number of tuned modes used as bases for model reduction are examined. Results from frequency mistuning approaches, fundamental mistuning model (FMM) and subset of nominal modes (SNM), are also generated and compared to those from full (360 deg) rotor ANSYS model. It is clearly seen that FMM and SNM are unable to yield accurate results whereas MMDA yields highly accurate results.
C1 [Vishwakarma, Vinod; Sinha, Alok] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
[Bhartiya, Yasharth] ANSYS Inc, Canonsburg, PA 15317 USA.
[Brown, Jeffery M.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Vishwakarma, V (reprint author), Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
EM vinod.vish@gmail.com; axs22@psu.edu; yasharth@gmail.com;
jeffrey.brown.70@us.af.mil
FU Air Force Research Laboratory (AFRL); GUIde Consortium at Duke
University, Durham, NC
FX This research has been supported by funds from the Air Force Research
Laboratory (AFRL) and GUIde Consortium at Duke University, Durham, NC.
The findings, opinions, and recommendations expressed therein are those
of authors and are not necessarily those of Duke University or the AFRL
or the GUIde Consortium Members.
NR 19
TC 1
Z9 1
U1 1
U2 2
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
EI 1528-8919
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD APR
PY 2015
VL 137
IS 4
AR 042502
DI 10.1115/1.4028615
PG 8
WC Engineering, Mechanical
SC Engineering
GA CC2AA
UT WOS:000350145500017
ER
PT J
AU Holston, MS
McClory, JW
Giles, NC
Halliburton, LE
AF Holston, M. S.
McClory, J. W.
Giles, N. C.
Halliburton, L. E.
TI Radiation-induced defects in LiAlO2 crystals: Holes trapped by lithium
vacancies and their role in thermoluminescence
SO JOURNAL OF LUMINESCENCE
LA English
DT Article
DE Trapped hole center; Radiation-induced defects; EPR; Thermoluminescence
ID OPTICALLY STIMULATED LUMINESCENCE; ELECTRON-PARAMAGNETIC-RESONANCE;
ALKALINE-EARTH OXIDES; CZOCHRALSKI GROWTH; SMALL POLARONS; GAMMA-LIALO2;
ALUMINATE; ABSORPTION; CENTERS; LI
AB Electron paramagnetic resonance (EPR) is used to identify the primary hole trap in undoped lithium aluminate (LiAlO2) crystals. Our interest in this material arises because it is a candidate for radiation detection applications involving either optically stimulated luminescence (OSL) or thermoluminescence (TL). During an x-ray irradiation at room temperature, holes are trapped at oxygen ions adjacent to lithium vacancies. Large concentrations of these lithium vacancies are introduced into the crystal during growth. With the magnetic field along the [001] direction, the EPR spectrum from these trapped-hole centers consists of eleven lines, evenly spaced but with varying intensities, caused by nearly equal hyperfine interactions with two Al-27 nuclei (I=5/2, 100% abundant). The g matrix is determined from the angular dependence of the EPR spectrum and has principal values of 2.0130, 2.0675, and 2.0015. These g shifts strongly support the model of a hole in a p orbital on an oxygen ion. The adjacent lithium vacancy stabilizes the hole on the oxygen ion. A sequence of pulsed thermal anneals above room temperature shows that the EPR spectrum from the holes trapped adjacent to the lithium vacancies disappears in the 90-120 degrees C range. The thermal decay of these hole centers directly correlates with an intense TL peak near 105 degrees C. Signals at lower magnetic field in the 9.4 GHz EPR spectra suggest that the electron trap associated with this TL peak at 105 degrees C may be a transition-metal-ion impurity, most likely Fe, located at a cation site. Additional less intense TL peaks are observed near 138, 176, and 278 degrees C. (C) 2014 Elsevier B.V. All rights reserved.
C1 [Holston, M. S.; McClory, J. W.; Giles, N. C.] US Air Force, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
[Halliburton, L. E.] W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
RP Halliburton, LE (reprint author), W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
EM Larry.Halliburton@mail.wvu.edu
FU Defense Threat Reduction Agency [HDTRA1-07-1-0008, BRBAA08-I-2-0128]
FX This work was supported at the Air Force Institute of Technology by the
Defense Threat Reduction Agency (Grants HDTRA1-07-1-0008 and
BRBAA08-I-2-0128). Views expressed in this paper are those of the
authors and do not necessarily reflect the official policy or position
of the Air Force, the Department of Defense, or the United States
Government
NR 34
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Z9 13
U1 1
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-2313
EI 1872-7883
J9 J LUMIN
JI J. Lumines.
PD APR
PY 2015
VL 160
BP 43
EP 49
DI 10.1016/j.jlumin.2014.11.018
PG 7
WC Optics
SC Optics
GA CC1FR
UT WOS:000350087100007
ER
PT J
AU Semiatin, SL
Kim, SL
Zhang, F
Tiley, JS
AF Semiatin, S. L.
Kim, S-L
Zhang, F.
Tiley, J. S.
TI An Investigation of High-Temperature Precipitation in Powder-Metallurgy,
Gamma/Gamma-Prime Nickel-Base Superalloys
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on High Entropy Alloy
CY MAR 15-19, 2015
CL Univ Tennessee, San Antonio, TX
SP Alcoa Tech Ctr, Natl Energy Technol Lab, US Army Res Off, TMS Struct Mat Div, TMS ASM
HO Univ Tennessee
ID SUPERSOLVUS HEAT-TREATMENT; PARTICLE DIFFUSION PROBLEM; AT-PERCENT AL;
MICROSTRUCTURE EVOLUTION; PHASE-TRANSFORMATIONS; MULTICOMPONENT ALLOYS;
VOLUME FRACTION; CR ALLOY; OSTWALD; NUCLEATION
AB The high-temperature-precipitation behavior of a typical powder-metallurgy, gamma-gamma-prime, nickel-base superalloy (LSHR) was determined and used to develop and validate a quantitative fast-acting model. To this end, a series of experiments comprising supersolvus solution treatment followed by continuous cooling at rates typical of those experienced during the manufacture of full-scale components was conducted for LSHR. The nucleation and growth of secondary-gamma-prime precipitates were deduced via metallography on samples water quenched at various temperatures during the cooling cycle. Further insight on nucleation and the extent of retained supersaturation during cooling was obtained from in situ synchrotron (X-ray diffraction) experiments involving cooling of LSHR samples at identical rates with or without a hold time at an intermediate temperature. The observations were interpreted using a fast-acting (spreadsheet) model which incorporated the important aspects of classical, homogeneous-nucleation theory and growth by bulk diffusion. In this regard, particular attention was paid to the determination of model input parameters such as the composition, free energy of formation, and surface energy of precipitates, and an effective diffusivity; the values so determined contrasted with those from existing thermodynamic and diffusion databases. It was demonstrated that fast-acting-model calculations based on a nickel-chromium pseudo-binary system gave good agreement with measurements of the evolution of precipitate volume fraction, number density, and size during continuous cooling. (C) The Minerals, Metals & Materials Society and ASM International 2015
C1 [Semiatin, S. L.] AFRL RXCM, Mat Proc Proc Sci, Wright Patterson AFB, OH 45433 USA.
[Tiley, J. S.] AFRL RXCM, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Kim, S-L] UES Inc, Dayton, OH 45432 USA.
[Zhang, F.] CompuTherm LLC, Madison, WI 53719 USA.
EM sheldon.semiatin@us.af.mil
RI SEMIATIN, SHELDON/E-7264-2017
FU [FA8650-10-D-5226]
FX This work was conducted as part of the in-house research of the Metals
Branch of the Air Force Research Laboratory's Materials and
Manufacturing Directorate. The support and encouragement of the
Laboratory management are gratefully acknowledged. The authors thank
P.N. Fagin, J.C. Schuren, A.R. Shiveley, and K. Shiveley for their
yeoman service in conducting the experiments and E. Stienecker, E.F.
Gaussa, and M.E. Kirby in metallography and analysis of experimental
data. Technical discussions with T.P. Gabb, C.K. Sudbrack, and W. Cao
are also much appreciated. One of the authors (SLK) was supported under
the auspices of contract FA8650-10-D-5226.
NR 65
TC 7
Z9 7
U1 4
U2 27
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD APR
PY 2015
VL 46A
IS 4
BP 1715
EP 1730
DI 10.1007/s11661-015-2748-0
PG 16
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CC4DL
UT WOS:000350300900032
ER
PT J
AU Lan, YC
Lin, F
Li, Y
Dias, YM
Wang, H
Liu, Y
Yang, Z
Zhou, HQ
Lu, YL
Bao, JM
Ren, ZF
Crimp, MA
AF Lan, Yucheng
Lin, Feng
Li, Yang
Dias, Yasmin
Wang, Hui
Liu, Yuan
Yang, Zhen
Zhou, Haiqing
Lu, Yalin
Bao, Jiming
Ren, Zhifeng
Crimp, Martin A.
TI Gallium nitride porous microtubules self-assembled from wurtzite
nanorods
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Crystal morphology; Growth models; Low dimensional structures;
Nanostructures; Semiconducting III-V materials
ID CHEMICAL-VAPOR-DEPOSITION; CARBON NANOTUBES; GAN NANOWIRES;
CROSS-SECTIONS; CUBIC GAN; GROWTH; FABRICATION; TUBES; SCALE;
NANOPARTICLES
AB Wurtzite gallium nitride microscale tubules were synthesized through chemical vapor deposition method. The tubules were self-assembled from nanorods without any templates. The self-assemblies were up to 100 mu m long and 10 mu m in diameter. The tubules were porous. The unique structures of the tubules caused red-shifts of Raman modes and yellow band in photoluminescence spectra. A possible growth mechanism of the porous microtubules was proposed based on experimental observations. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Lan, Yucheng; Dias, Yasmin] Morgan State Univ, Dept Phys & Engn Phys, Baltimore, MD 21251 USA.
[Lan, Yucheng; Wang, Hui; Liu, Yuan; Yang, Zhen; Zhou, Haiqing; Ren, Zhifeng] Univ Houston, Dept Phys, Houston, TX 77024 USA.
[Lan, Yucheng; Wang, Hui; Liu, Yuan; Yang, Zhen; Zhou, Haiqing; Ren, Zhifeng] Univ Houston, Texas Ctr Superconduct, Houston, TX 77024 USA.
[Lin, Feng] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China.
[Li, Yang; Bao, Jiming] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
[Crimp, Martin A.] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA.
RP Lan, YC (reprint author), Morgan State Univ, Dept Phys & Engn Phys, Baltimore, MD 21251 USA.
EM yucheng.lan@morgan.edu; linf@pku.edu.cn
RI Lan, Yucheng/F-9501-2011
OI Lan, Yucheng/0000-0002-6737-4168
FU Defense Threat Reduction Agency [HDTRA122221]; US Department of Energy
[DE-NA0000720]; Center for Nanoscale Systems at Harvard University under
NSF [ECS-0335765]; National Basic Research Program of China (973
program) [2012CB933004]; National Science Foundation [ECCS-1240510,
DMR-0907336]; Robert A Welch Foundation [E-1728]; University of Houston
FX The authors Y.C.L. and Z.F.R. thank the financial support by the Defense
Threat Reduction Agency under Grant HDTRA122221. Y.C.L. acknowledges the
support from US Department of Energy under the Contract DE-NA0000720
through the program of S.P. Massie Chair of Excellence, the Small Grant
Program from the University of Houston and the Center for Nanoscale
Systems at Harvard University which is supported under NSF ECS-0335765.
F.L. is supported by the National Basic Research Program of China (973
program), Grant no. 2012CB933004. J.M.B. acknowledges the support from
the National Science Foundation (CAREER Award ECCS-1240510 and
DMR-0907336) and from the Robert A Welch Foundation (E-1728). M.A.C.
thanks the Center for Advanced Microscopy at Michigan State University
for utilizing the JEM 2200FS electron microscope.
NR 57
TC 4
Z9 5
U1 1
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD APR 1
PY 2015
VL 415
BP 139
EP 145
DI 10.1016/j.jcrysgro.2014.12.037
PG 7
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA CB4NC
UT WOS:000349603500024
ER
PT J
AU Kumar, A
Maschmann, MR
Hodson, SL
Baur, J
Fisher, TS
AF Kumar, Anurag
Maschmann, Matthew R.
Hodson, Stephen L.
Baur, Jeffery
Fisher, Timothy S.
TI Carbon nanotube arrays decorated with multi-layer graphene-nanopetals
enhance mechanical strength and durability
SO CARBON
LA English
DT Article
ID POLYMER NANOCOMPOSITES; IN-SITU; COMPOSITES; MICROSTRUCTURE; MORPHOLOGY;
DENSITY; FORESTS; FOAMS; FILMS; CVD
AB We report growth of a hierarchical nanostructure consisting of multi-layer graphene-petals decorating individual carbon nanotubes in a vertically aligned CNT array. The structure obtained by post-growth treatment of the CNT array in a microwave plasma chemical vapor deposition process leads to a remarkable increase in array stability, stiffness, elastic recovery and energy absorption capacity and a decrease in stress softening. Further, the change in properties can be tuned by controlling the petal growth time. For a 50 mu m tall array, growth of graphene petals increases the buckling load and energy absorbed in load-unload cycles by a factor of about 60. The petal-coated CNT arrays also retain their morphology during solvent immersion and evaporation cycles, while arrays without petals coalesce into highly dense regions. The results open a new pathway towards tuning mechanical behavior of any arbitrary CNT array and also demonstrate the importance of structural hierarchy in tailoring the behavior of nanostructures. (C) 2014 Elsevier Ltd. All rights reserved.
C1 [Kumar, Anurag; Hodson, Stephen L.; Fisher, Timothy S.] Purdue Univ, Sch Mech Engn, Lafayette, IN 47907 USA.
[Kumar, Anurag; Hodson, Stephen L.; Fisher, Timothy S.] Purdue Univ, Birck Nanotechnol Ctr, Lafayette, IN 47907 USA.
[Maschmann, Matthew R.] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA.
[Maschmann, Matthew R.; Baur, Jeffery] US Air Force, AFRL AX, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Maschmann, Matthew R.] Univ Technol Corp, Beavercreek, OH 45432 USA.
RP Fisher, TS (reprint author), Purdue Univ, Sch Mech Engn, Lafayette, IN 47907 USA.
EM tsfisher@purdue.edu
RI Fisher, Timothy/D-8517-2011;
OI Fisher, Timothy/0000-0002-8909-313X; Kumar, Anurag/0000-0002-2804-8896
FU Air Force Office of Scientific Research (AFOSR); University of Missouri
College of Engineering; U.S. Air Force Research Laboratory (AFRL), and
its Office of Scientific Research (AFOSR) under the MURI program on
Nanofabrication of Tunable 3D Nanotube Architectures [FA9550-12-1-0037]
FX M.R.M acknowledges financial support from the Air Force Office of
Scientific Research (AFOSR), Dr. Byung-Lip (Les) Lee, Program Manager
and startup funds from the University of Missouri College of
Engineering. The authors are thankful to the U.S. Air Force Research
Laboratory (AFRL), and its Office of Scientific Research (AFOSR,
FA9550-12-1-0037) under the MURI program on Nanofabrication of Tunable
3D Nanotube Architectures (PM: Dr. Joycelyn Harrison), for financial
support of this work.
NR 41
TC 12
Z9 12
U1 9
U2 114
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
EI 1873-3891
J9 CARBON
JI Carbon
PD APR
PY 2015
VL 84
BP 236
EP 245
DI 10.1016/j.carbon.2014.11.060
PG 10
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CA5NQ
UT WOS:000348955500026
ER
PT J
AU Zhou, Y
Stanciulescu, I
Eason, T
Spottswood, M
AF Zhou, Yang
Stanciulescu, Ilinca
Eason, Thomas
Spottswood, Michael
TI Nonlinear elastic buckling and postbuckling analysis of cylindrical
panels
SO FINITE ELEMENTS IN ANALYSIS AND DESIGN
LA English
DT Article
DE Nonlinear buckling and postbuckling analysis; The arclength method; The
branch-switching method; Critical points; Secondary paths
ID FINITE-ELEMENT-ANALYSIS; ASYMPTOTIC-NUMERICAL METHOD; BOUNDARY
CONDITIONS; COMPOSITE SHELLS; FORMULATION; STABILITY; PRESSURE
AB This paper revisits the buckling analysis of a benchmark cylindrical panel undergoing snap through when subjected to transverse loads. We show that previous studies either overestimated the buckling load and identified a false buckling mode, or failed to identify all secondary solution branches. Here, a numerical procedure composed of the arclength and branch switching methods is used to identify the Full postbuckling response of the panel. Additional bifurcation points and corresponding secondary paths are discovered. Parametric studies of the effect of the rise, thickness, and boundary conditions of the panel on the buckling and postbuckling responses are also performed. (C) 2014 Elsevier B.V. All rights reserved.
C1 [Zhou, Yang; Stanciulescu, Ilinca] Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA.
[Eason, Thomas; Spottswood, Michael] Air Force Res Lab, Struct Sci Ctr, Wright Patterson AFB, OH USA.
RP Stanciulescu, I (reprint author), Rice Univ, Dept Civil & Environm Engn, 6100 Main St, Houston, TX 77005 USA.
EM ilinca.s@rice.edu
OI Stanciulescu, Ilinca/0000-0003-4515-0363
FU AFOSR [FA9550-121-1-0130]; HPTI [BY11020SP, BY12020SP, BY13020SP]; Data
Analysis and Visualization Cyber-infrastructure - NSF [OCI-0959097]
FX The work has been funded by AFOSR under Grant no. FA9550-121-1-0130 and
by HPTI under Grant nos. BY11020SP, BY12020SP, and BY13020SP. These
supports are greatly appreciated. Support was also received from the
Data Analysis and Visualization Cyber-infrastructure funded by NSF under
Grant OCI-0959097. We thank the reviewers for providing comments that
helped us to improve this paper
NR 41
TC 11
Z9 11
U1 2
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-874X
EI 1872-6925
J9 FINITE ELEM ANAL DES
JI Finite Elem. Anal. Des.
PD APR
PY 2015
VL 96
BP 41
EP 50
DI 10.1016/j.finel.2014.12.001
PG 10
WC Mathematics, Applied; Mechanics
SC Mathematics; Mechanics
GA AY2GD
UT WOS:000347405900004
ER
PT J
AU Geng, Z
Deng, H
Himed, B
AF Geng, Zhe
Deng, Hai
Himed, Braham
TI Adaptive Radar Beamforming for Interference Mitigation in Radar-Wireless
Spectrum Sharing
SO IEEE SIGNAL PROCESSING LETTERS
LA English
DT Article
DE Digital beamforming; interference mitigation; radar signal processing;
wireless communications
ID MIMO RADARS; NETWORKS; ARRAY
AB The key to the feasibility of spectrum sharing between radar and wireless systems is effective mainlobe interference mitigation processing by the radar. Traditional array processing is capable to cancel sidelobe interferences only. This letter presents an innovative beamforming approach, the first of its kind, to eliminate wireless interference in both mainlobe and sidelobe directions based on a coherent phase-coding multiple-input multiple-output (MIMO) radar platform. The theoretical proof and conditions of simultaneous mainlobe interference cancellation and target detection using coherent MIMO radar are mathematically derived and numerically verified. The simulation results demonstrate the radar can effectively eliminate wireless interferences from base stations and mobile handsets during spectrum-sharing.
C1 [Geng, Zhe; Deng, Hai] Florida Int Univ, Miami, FL 33174 USA.
[Himed, Braham] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Geng, Z (reprint author), Florida Int Univ, Miami, FL 33174 USA.
EM zgeng001@fiu.edu; braham.himed@us.af.mil
OI Geng, Zhe/0000-0002-5440-3556
FU FIU; Defense Engineering Corporation by Air Force Research Laboratory
[FA8650-12-D-1376]; National Science Foundation (NSF) [AST-1443909]
FX The work of Z. Geng was supported by the FIU Presidential Fellowship.
The work of H. Deng was supported in part by a subcontract with Defense
Engineering Corporation for research sponsored by the Air Force Research
Laboratory under Contract FA8650-12-D-1376, and by the National Science
Foundation (NSF) under Award AST-1443909. The associate editor
coordinating the review of this manuscript and approving it for
publication was Prof. Joseph Tabrikian.
NR 19
TC 5
Z9 7
U1 1
U2 27
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1070-9908
EI 1558-2361
J9 IEEE SIGNAL PROC LET
JI IEEE Signal Process. Lett.
PD APR
PY 2015
VL 22
IS 4
BP 484
EP 488
DI 10.1109/LSP.2014.2363585
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA AS8FQ
UT WOS:000344485800003
ER
PT J
AU Reed, AN
Shamberger, PJ
Hu, JJ
Muratore, C
Bultman, JE
Voevodin, AA
AF Reed, A. N.
Shamberger, P. J.
Hu, J. J.
Muratore, C.
Bultman, J. E.
Voevodin, A. A.
TI Microstructure of ZnO thin films deposited by high power impulse
magnetron sputtering
SO THIN SOLID FILMS
LA English
DT Article
DE HiPIMS; ZnO; Low-temperature deposition; Sputtering; Microstructure
ID PULSED-LASER DEPOSITION; ZINC-OXIDE; ENERGY-DISTRIBUTION; CVD METHOD;
GROWTH; SILICON; SAPPHIRE; PLASMA; IONS
AB High power impulse magnetron sputtering was used to deposit thin ( similar to 100 nm) zinc oxide (ZnO) films from a ceramic ZnO target onto substrates heated to 150 degrees C. The resulting films had strong crystallinity, highly aligned (002) texture and low surface roughness (root mean square roughness less than 10 nm), as determined by X-ray diffraction, transmission electron microscopy, scanning electron microscopy and atomic force spectroscopy measurements. Deposition pressure and target-substrate distance had the greatest effect on film microstructure. The degree of alignment in the films was strongly dependent on the gas pressure. Deposition at pressures less than 0.93 Pa resulted in a bimodal distribution of grain sizes. An initial growth layer with preferred orientations (101) and (002) parallel to the interface was observed at the film-substrate interface under all conditions examined here; the extent of that competitive region was dependent on growth conditions. Time-resolved current measurements of the target and ion energy distributions, determined using energy resolved mass spectrometry, were correlated to film microstructure in order to investigate the effect of plasma conditions on film nucleation and growth. Published by Elsevier B.V.
C1 [Reed, A. N.; Hu, J. J.; Bultman, J. E.; Voevodin, A. A.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Reed, A. N.; Muratore, C.] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
[Shamberger, P. J.] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
[Hu, J. J.; Bultman, J. E.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Reed, AN (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM amber.reed.5@us.af.mil; andrey.voevodin@us.af.mil
RI Shamberger, Patrick/C-4795-2014
OI Shamberger, Patrick/0000-0002-8737-6064
FU Air Force Office of Scientific Research Aerospace Materials for Extreme
Environments program [14RX13COR]
FX The authors would like to thank A.J. Safriet, N.R. Glavin, R.D. Smith,
M.L. Jespersen, M.E. McConney, A.R. Waite, M.H. Check and K.D. Leedy for
their support. Financial support from the Air Force Office of Scientific
Research Aerospace Materials for Extreme Environments program
(14RX13COR) is gratefully acknowledged.
NR 46
TC 9
Z9 9
U1 5
U2 57
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD MAR 31
PY 2015
VL 579
BP 30
EP 37
PG 8
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA CF0FY
UT WOS:000352219700005
ER
PT J
AU Wang, JL
Huang, HL
Liu, CH
Fu, ZP
Zhai, XF
Peng, RR
Lu, YL
AF Wang, Jianlin
Huang, Haoliang
Liu, Changhui
Fu, Zhengping
Zhai, Xiaofang
Peng, Ranran
Lu, Yalin
TI Platinum-induced structural collapse in layered oxide polycrystalline
films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID NOBLE METAL OXIDES; DELAFOSSITE STRUCTURE; TEMPERATURE; CHEMISTRY;
SYSTEM
AB Effect of a platinum bottom electrode on the SrBi5Fe1-xCoxTi4O18 layered oxide polycrystalline films was systematically studied. The doped cobalt ions react with the platinum to form a secondary phase of PtCoO2, which has a typical Delafossite structure with a weak antiferromagnetism and an exceptionally high in-plane electrical conductivity. Formation of PtCoO2 at the interface partially consumes the cobalt dopant and leads to the structural collapsing from 5 to 4 layers, which was confirmed by X-ray diffraction and high resolution transmission electron microscopy measurements. Considering the weak magnetic contribution from PtCoO2, the observed ferromagnetism should be intrinsic of the Aurivillius compounds. Ferroelectric properties were also indicated by the piezoresponse force microscopy. In this work, the platinum induced secondary phase at the interface was observed, which has a strong impact on Aurivillius structural configuration and thus the ferromagnetic and ferroelectric properties. (C) 2015 AIP Publishing LLC.
C1 [Wang, Jianlin; Huang, Haoliang; Liu, Changhui; Fu, Zhengping; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Huang, Haoliang; Fu, Zhengping; Zhai, Xiaofang; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Fu, Zhengping; Zhai, Xiaofang; Peng, Ranran; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Laser & Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA.
RP Peng, RR (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
EM pengrr@ustc.edu.cn; yllu@ustc.edu.cn
RI Peng, Ranran/F-5934-2010
FU National Basic Research Program of China (973 Program) [2012CB922000];
Natural Science Foundation of China [51472228]; Fundamental Research
Funds for the Central Universities [WK2060140019]
FX This work was supported by the National Basic Research Program of China
(973 Program, 2012CB922000), the Natural Science Foundation of China
(No. 51472228), and the Fundamental Research Funds for the Central
Universities (No. WK2060140019).
NR 23
TC 1
Z9 1
U1 4
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 30
PY 2015
VL 106
IS 13
AR 132903
DI 10.1063/1.4915507
PG 4
WC Physics, Applied
SC Physics
GA CF1MT
UT WOS:000352310700041
ER
PT J
AU Sescu, A
Visbal, M
Rizzetta, D
AF Sescu, Adrian
Visbal, Miguel
Rizzetta, Donald
TI A study of the effect of step excrescences and free-stream disturbances
on boundary layer stability
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
LA English
DT Article
DE boundary layers; receptivity; computational fluid dynamics; high-order
schemes; wave propagation; compact finite differencing
ID LARGE-EDDY SIMULATION; TOLLMIEN-SCHLICHTING WAVES; FINITE-DIFFERENCE
SCHEMES; ROUGHNESS ELEMENTS; EVOLUTION; ROW
AB In this work, a study of the mechanism by which free-stream acoustic and vorticity disturbances interact with a boundary layer flow developing over a flat plate featuring a step excrescence located at a certain distance from a blunt leading edge is included. The numerical tool is a high-fidelity implicit numerical algorithm solving for the unsteady, compressible form of the Navier-Stokes equations in a body-fitted curvilinear coordinates and employing high-accurate compact differencing schemes with Pade-type filters. Acoustic and vorticity waves are generated using a source term in the momentum and energy equations, as opposed to using inflow boundary conditions, to avoid spurious waves that may propagate from boundaries. The results show that the receptivity to surface step excrescences is largely the result of an overall adverse pressure gradient posed by the step, and that the free-stream disturbances accelerate the generation of instabilities in the downstream. As expected, it is found that the acoustic disturbance interacting with the surface imperfection is more efficient in exciting the Tollmien-Schlichting waves than the vorticity disturbance. The latter generates Tollmien-Schlichting waves that are grouped in wave packets consistent with the wavelength of the free-stream disturbance. Copyright (c) 2015 John Wiley & Sons, Ltd.
C1 [Sescu, Adrian] Mississippi State Univ, Dept Aerosp Engn, Mississippi State, MS 39762 USA.
[Visbal, Miguel; Rizzetta, Donald] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sescu, A (reprint author), Mississippi State Univ, Dept Aerosp Engn, 330 Walker,Hardy Rd, Mississippi State, MS 39762 USA.
EM sescu@ae.msstate.edu
FU ASEE; AFOSR
FX The first author would like to thank ASEE and AFOSR for funding the
summer fellowship at Air Force Research Laboratory.
NR 37
TC 1
Z9 1
U1 0
U2 6
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0271-2091
EI 1097-0363
J9 INT J NUMER METH FL
JI Int. J. Numer. Methods Fluids
PD MAR 30
PY 2015
VL 77
IS 9
BP 509
EP 525
DI 10.1002/fld.3993
PG 17
WC Computer Science, Interdisciplinary Applications; Mathematics,
Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas
SC Computer Science; Mathematics; Mechanics; Physics
GA CC1RX
UT WOS:000350122000001
ER
PT J
AU Schmitt-Sody, A
French, D
White, W
Lucero, A
Roach, WP
Hasson, V
AF Schmitt-Sody, Andreas
French, David
White, William
Lucero, Adrian
Roach, William P.
Hasson, Victor
TI The importance of corona generation and leader formation during laser
filament guided discharges in air
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB Images taken with an intensified CCD camera show the dynamics during filament guided discharge events. The images reveal that filament initiated corona plays a role in the presented results. Furthermore, the images show the formation of leaders, propagating and eventually bridging the gap between the high voltage (HV) electrodes. Analysis of the images and comparison to oscilloscope traces of voltage and current dynamics reveal the origin of the delay between the filament and HV discharge and allows for a probability of discharge analysis. (C) 2015 AIP Publishing LLC.
C1 [Schmitt-Sody, Andreas; French, David; White, William] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Lucero, Adrian] Boeing DES, Kirtland AFB, NM 87117 USA.
[Roach, William P.] Air Force Off Sci & Res, Arlington, VA 22203 USA.
[Hasson, Victor] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
RP Schmitt-Sody, A (reprint author), Air Force Res Lab, Kirtland AFB, NM 87117 USA.
NR 17
TC 3
Z9 3
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 23
PY 2015
VL 106
IS 12
AR 124101
DI 10.1063/1.4916219
PG 4
WC Physics, Applied
SC Physics
GA CE5LM
UT WOS:000351876700064
ER
PT J
AU Wiens, JP
Shuman, NS
Viggiano, AA
AF Wiens, Justin P.
Shuman, Nicholas S.
Viggiano, Albert A.
TI Dissociative recombination and mutual neutralization of heavier
molecular ions: C10H8+, WF5+, and CnFm+
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ELECTROSTATIC STORAGE-RING; H-2-O-2-N-2 FLAMES; CHEMICAL-KINETICS;
FLOWING AFTERGLOW; IONIZATION; COEFFICIENTS; ATTACHMENT; COLLISIONS;
CHEMISTRY; ELECTRONS
AB Dissociative recombination (DR) rate coefficients for the naphthalene cation, C10H8+, and WF5+, and mutual neutralization (MN) rate coefficients for these species and five CnFm+ ions, were determined at 300 K using variable electron and neutral density attachment mass spectrometry (VENDAMS). DR proceeds at 9 +/- 3 x 10(-7) cm(3) s(-1) for C10H8+ and at 6.1 x 1.4 x 10(-7) cm(3) s(-1) for WF5+. Consistent with previous results, MN for the polyatomic cations with the halide anions Cl-, Br-, and I- exhibits an approximate mu(-1/2) reduced mass dependence of the reactant partners, demonstrating that ion collision velocities influence the rate coefficients. This work is an extension of VENDAMS to systems, where low reactant concentrations are necessary to avoid significant reaction of product ions with the neutral precursor, i. e., conditions not suitable for traditional flowing afterglow measurements, as well as to ions of masses >similar to 100 Da, which are not amenable to the study of DR in magnetic storage rings. Our results expand the sparse literature on DR and MN of heavier ions. (C) 2015 AIP Publishing LLC.
C1 [Wiens, Justin P.; Shuman, Nicholas S.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Wiens, JP (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
FU Air Force Office of Scientific Research [AFOSR-2303-EP]; National
Research Council associateship program
FX This work was funded by the Air Force Office of Scientific Research,
Grant No. AFOSR-2303-EP. J.P.W. acknowledges support from the National
Research Council associateship program.
NR 50
TC 3
Z9 3
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 21
PY 2015
VL 142
IS 11
AR 114304
DI 10.1063/1.4913829
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CE0WK
UT WOS:000351530100022
PM 25796246
ER
PT J
AU Lu, CA
Newell, TC
Glebov, L
Balakrishnan, G
AF Lu, C. A.
Newell, T. C.
Glebov, L.
Balakrishnan, G.
TI Wavelength beam combining of VECSELs using multiplexed volume Bragg
gratings in a compound cavity
SO ELECTRONICS LETTERS
LA English
DT Article
DE integrated optics; OFDM modulation; multiplexing equipment; optical
directional couplers; silicon compounds; optical waveguides; optical
delay lines; fast Fourier transforms; integrated-optic OFDM signal
multiplexer; optical IFFY circuit; integrated optical device; optical
orthogonal frequency division multiplexing signal; optical domain;
optical inverse fast Fourier transform; directional couplers; delay
lines; combiner; silica waveguide technology; bit rate 40 Gbit; s to 80
Gbit; s; SiO2
ID LASERS; POWER
AB An integrated optical device that is able to multiplex modulated signals to an optical orthogonal frequency division multiplexing (OFDM) signal directly in the optical domain is demonstrated. The device operates based on optical inverse fast Fourier transform (IFFT). It is composed of directional couplers, delay lines and a combiner, which was fabricated with silica waveguide technology. The operation was experimentally confirmed by generating 40 and 80 Gbit/s optical OFDM signals.
C1 [Lu, C. A.; Newell, T. C.] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Glebov, L.] Univ Cent Florida, CREOL, Coll Opt & Photon, Orlando, FL 32816 USA.
[Lu, C. A.; Balakrishnan, G.] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87117 USA.
RP Lu, CA (reprint author), US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
EM chunte.lu@kirtland.af.mil
FU AFOSR
FX The authors thank the AFOSR for providing support and funding.
NR 8
TC 1
Z9 1
U1 1
U2 8
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
EI 1350-911X
J9 ELECTRON LETT
JI Electron. Lett.
PD MAR 19
PY 2015
VL 51
IS 6
BP 508
EP 509
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA CD7LK
UT WOS:000351271700041
ER
PT J
AU Wang, JS
Smith, HE
Brown, GJ
AF Wang, Joanna S.
Smith, Howard E.
Brown, Gail J.
TI Stability and aging studies of lead sulfide quantum dot films:
Photoabsorption, morphology, and chemical state characteristics
SO MATERIALS CHEMISTRY AND PHYSICS
LA English
DT Article
DE Optical properties; Oxidation; X-ray photoelectron spectroscopy (XPS);
Thin films
ID BINARY NANOPARTICLE SUPERLATTICES; PBSE NANOCRYSTALS; ORDERED ARRAYS;
STRUCTURAL-CHARACTERIZATION; POLYMER COMPOSITES; COLLOIDAL PBSE;
PARTICLE-SIZE; THIN-FILMS; DEPOSITION; PHOTODETECTORS
AB The stability of colloidal PbS quantum dot (QD) films deposited on glass substrates was studied over a short term and a long term periods, when left unprotected in air under ambient conditions. Two deposition approaches were used, traditional solvent deposition method (SDM) and supercritical fluid CO2 deposition (SFD). To track possible changes to the QDs over time, near infrared (NIR) spectrometry, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), transmission electron micro-scopy (TEM), and optical microscopy, were employed. Evidence points towards initial oxidation-induced shrinking of the active QD volume causing a blue shift of the absorption over the first four months, and then experiencing competition from oxidation and sintering/ripening of the QDs, resulting in a red shift. The presented studies have important consequences for the long term reliability of light emitters based on PbS QDs. (C) 2015 Published by Elsevier B.V.
C1 [Wang, Joanna S.; Smith, Howard E.; Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Smith, Howard E.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Wang, JS (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM jswang@uidaho.edu
FU Air Force Base Research Laboratory [FA8650-11-D-5800]
FX This work is financially supported by the Air Force Base Research
Laboratory [Contract No. FA8650-11-D-5800].
NR 41
TC 0
Z9 0
U1 6
U2 30
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0254-0584
EI 1879-3312
J9 MATER CHEM PHYS
JI Mater. Chem. Phys.
PD MAR 15
PY 2015
VL 154
BP 44
EP 52
DI 10.1016/j.matchemphys.2015.01.043
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA CC1BF
UT WOS:000350075500007
ER
PT J
AU Iacopi, F
Mishra, N
Cunning, BV
Goding, D
Dimitrijev, S
Brock, R
Dauskardt, RH
Wood, B
Boeckl, J
AF Iacopi, Francesca
Mishra, Neeraj
Cunning, Benjamin Vaughan
Goding, Dayle
Dimitrijev, Sima
Brock, Ryan
Dauskardt, Reinhold H.
Wood, Barry
Boeckl, John
TI A catalytic alloy approach for graphene on epitaxial SiC on silicon
wafers
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID LARGE-AREA; GROWTH; ADHESION; TEMPERATURE; GRAPHITE; CARBIDE; LAYERS;
FILMS
AB We introduce a novel approach to the synthesis of high-quality and highly uniform few-layer graphene on silicon wafers, based on solid source growth from epitaxial 3C-SiC films. Using a Ni/Cu catalytic alloy, we obtain a transfer-free bilayer graphene directly on Si(100) wafers, at temperatures potentially compatible with conventional semiconductor processing. The graphene covers uniformly a 2 '' silicon wafer, with a Raman I-D/I-G band ratio as low as 0.5, indicative of a low defectivity material. The sheet resistance of the graphene is as low as 25 Omega/square, and its adhesion energy to the underlying substrate is substantially higher than transferred graphene. This work opens the avenue for the true wafer-level fabrication of microdevices comprising graphene functional layers. Specifically, we suggest that exceptional conduction qualifies this graphene as a metal replacement for MEMS and advanced on-chip interconnects with ultimate scalability.
C1 [Iacopi, Francesca; Mishra, Neeraj; Cunning, Benjamin Vaughan; Goding, Dayle; Dimitrijev, Sima] Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.
[Brock, Ryan; Dauskardt, Reinhold H.] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
[Wood, Barry] Univ Queensland, Ctr Microscopy & Microanal, St Lucia, Qld 4072, Australia.
[Boeckl, John] US Air Force, Res Labs, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Iacopi, F (reprint author), Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.
EM f.iacopi@griffith.edu.au
RI Griffith University, QMNC/I-5498-2013; Iacopi, Francesca/D-8934-2013
OI Iacopi, Francesca/0000-0002-3196-0990
FU Australian National Fabrication Facility (ANFF); Air Force Office of
Scientific Research [AOARD 144045]; Australian Research Council
[FT120100445]
FX We acknowledge Glenn Walker, Philip Tanner, Alan Iacopi, and Anthony
Christian for their valuable technical support. The authors acknowledge
the support from the Australian National Fabrication Facility (ANFF) and
the Air Force Office of Scientific Research through the grant AOARD
144045. Dr. Francesca Iacopi is the recipient of a Future Fellowship
from the Australian Research Council (FT120100445).
NR 32
TC 13
Z9 13
U1 7
U2 39
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD MAR 14
PY 2015
VL 30
IS 5
BP 609
EP 616
DI 10.1557/jmr.2015.3
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA CD9UO
UT WOS:000351444200002
ER
PT J
AU Tapp, MJN
Sullivan, RS
Dennis, P
Naik, RR
Milam, VT
AF Tapp, Maeling J. N.
Sullivan, Richard S.
Dennis, Patrick
Naik, Rajesh R.
Milam, Valeria T.
TI Spectroscopic studies of nucleic acid additions during seed-mediated
growth of gold nanoparticles
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID SURFACE-PLASMON RESONANCE; SHAPE CONTROL; STRANDED-DNA; NANORODS; SIZE;
ADSORPTION; POLYNUCLEOTIDES; NANOSTRUCTURES; ABSORPTION; POLYMER
AB The effect of adding nucleic acids to gold seeds during the growth stage of either nanospheres or nanorods was investigated using UV-Vis spectroscopy to reveal any oligonucleotide base or structure-specific effects on nanoparticle growth kinetics or plasmonic signatures. Spectral data indicate that the presence of DNA duplexes during seed aging drastically accelerated nanosphere growth while the addition of single-stranded polyadenine at any point during seed aging induces nanosphere aggregation. For seeds added to a gold nanorod growth solution, single-stranded polythymine induces a modest blue shift in the longitudinal peak wave length. Moreover, a particular sequence comprised of 50% thymine bases was found to induce a faster, more dramatic blue shift in the longitudinal peak wave length compared to any of the homopolymer incubation cases. Monomeric forms of the nucleic acids, however, do not yield discernable spectral differences in any of the gold suspensions studied.
C1 [Tapp, Maeling J. N.; Sullivan, Richard S.; Milam, Valeria T.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Dennis, Patrick; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Soft Matter Mat Branch, Wright Patterson AFB, OH 45433 USA.
[Milam, Valeria T.] Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA.
[Milam, Valeria T.] Georgia Inst Technol, Petit Inst Bioengn & Biosci, Atlanta, GA 30332 USA.
RP Milam, VT (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM valeria.milam@mse.gatech.edu
FU GT-AFOSR BIONIC Center of Excellence [FA9550-09-1-0162]; AFRL/RX; NIH
Training Grant (T32, NIBIB) [T32EB006343-02]; NSF Graduate Research
Fellowship; GAANN Fellowship
FX The authors gratefully acknowledge the funding support of GT-AFOSR
BIONIC Center of Excellence (FA9550-09-1-0162) and AFRL/RX. M.T. also
acknowledges support of a NIH Training Grant (T32, NIBIB,
T32EB006343-02), NSF Graduate Research Fellowship, and a GAANN
Fellowship. Flow cytometry studies were carried out at the Petit
Institute for Bioengineering and Bioscience (IBB) Core Lab facilities.
TEM characterization was carried out in the Center for Nanostructure
Characterization at the Georgia Institute of Technology.
NR 54
TC 0
Z9 0
U1 2
U2 25
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD MAR 14
PY 2015
VL 30
IS 5
BP 666
EP 676
DI 10.1557/jmr.2014.409
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA CD9UO
UT WOS:000351444200008
PM 25960601
ER
PT J
AU Fairchild, SB
Boeckl, J
Back, TC
Ferguson, JB
Koerner, H
Murray, PT
Maruyama, B
Lange, MA
Cahay, MM
Behabtu, N
Young, CC
Pasquali, M
Lockwood, NP
Averett, KL
Gruen, G
Tsentalovich, DE
AF Fairchild, S. B.
Boeckl, J.
Back, T. C.
Ferguson, J. B.
Koerner, H.
Murray, P. T.
Maruyama, B.
Lange, M. A.
Cahay, M. M.
Behabtu, N.
Young, C. C.
Pasquali, M.
Lockwood, N. P.
Averett, K. L.
Gruen, G.
Tsentalovich, D. E.
TI Morphology dependent field emission of acid-spun carbon nanotube fibers
SO NANOTECHNOLOGY
LA English
DT Article
DE carbon nanotube; fiber; field emission
ID ELECTRON-EMISSION; COLD-CATHODE; SINGLE-WALL; ARRAYS; YARNS; EMITTERS;
FILMS; MICROSTRUCTURE; CONDUCTIVITY; MONOXIDE
AB Acid spun carbon nanotube (CNT) fibers were investigated for their field emission properties and performance was determined to be dependent on fiber morphology. The fibers were fabricated by wet-spinning of pre-made CNTs. Fiber morphology was controlled by a fabrication method and processing conditions, as well as purity, size, and type of the CNT starting material. The internal fiber structure consisted of CNT fibrils held together by van der Waals forces. Alignment and packing density of the CNTs affects the fiber's electrical and thermal conductivity. Fibers with similar diameters and differing morphology were compared, and those composed of the most densely packed and well aligned CNTs were the best field emitters as exhibited by a lower turn-on voltage and a larger field enhancement factor. Fibers with higher electrical and thermal conductivity demonstrated higher maximum current before failure and longer lifetimes. A stable emission current at 3 mA was obtained for 10 h at a field strength of <1 V mu m(-1). This stable high current operation makes these CNT fibers excellent candidates for use as low voltage electron sources for vacuum electronic devices.
C1 [Fairchild, S. B.; Boeckl, J.; Ferguson, J. B.; Koerner, H.; Maruyama, B.; Averett, K. L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Back, T. C.; Murray, P. T.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Lange, M. A.; Gruen, G.] TechFlow Sci, Albuquerque, NM 87110 USA.
[Lockwood, N. P.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Cahay, M. M.] Univ Cincinnati, Spintron & Vacuum Nanoelect Lab, Cincinnati, OH 45221 USA.
[Behabtu, N.; Young, C. C.; Pasquali, M.; Tsentalovich, D. E.] Rice Univ, Smalley Inst Nanoscale Sci & Technol, Dept Chem & Biomol Engn, Houston, TX 77005 USA.
[Behabtu, N.; Young, C. C.; Pasquali, M.; Tsentalovich, D. E.] Rice Univ, Smalley Inst Nanoscale Sci & Technol, Dept Chem, Houston, TX 77005 USA.
RP Fairchild, SB (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM steven.fairchild@us.af.mil
RI Pasquali, Matteo/A-2489-2008;
OI Pasquali, Matteo/0000-0001-5951-395X; Murray,
Patrick/0000-0001-8516-1839
FU Air Force at Air Force Research Laboratory Materials and Manufacturing
Directorate [FA8650-11-D-5401, FA9550-09-1-0590]; Robert A Welch
foundation at Rice University [C-1668]
FX This work was supported by Air Force contracts FA8650-11-D-5401 at Air
Force Research Laboratory Materials and Manufacturing Directorate, and
FA9550-09-1-0590 as well as Robert A Welch foundation grant C-1668 at
Rice University. The authors thank John Luginsland, Jason Marshall and
Joycelyn Harrison at the Air Force Office of Scientific Research for
supporting this work.
NR 58
TC 9
Z9 9
U1 2
U2 33
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
EI 1361-6528
J9 NANOTECHNOLOGY
JI Nanotechnology
PD MAR 13
PY 2015
VL 26
IS 10
AR 105706
DI 10.1088/0957-4484/26/10/105706
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA CM7PV
UT WOS:000357888300005
PM 25694166
ER
PT J
AU Mansfield, E
Sowards, JW
Crookes-Goodson, WJ
AF Mansfield, Elisabeth
Sowards, Jeffrey W.
Crookes-Goodson, Wendy J.
TI Findings and Recommendations from the NIST Workshop on Alternative Fuels
and Materials: Biocorrosion
SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND
TECHNOLOGY
LA English
DT Article
DE alternative fuels; bacterial; biofilm; biosusceptibility; corrosion;
microbial
AB In 2013, the Applied Chemicals and Materials Division of the National Institute of Standards and Technology (NIST) hosted a workshop to identify and prioritize research needs in the area of biocorrosion. Materials used to store and distribute alternative fuels have experienced an increase in corrosion due to the unique conditions caused by the presence of microbes and the chemistry of biofuels and biofuel precursors. Participants in this workshop, including experts from the microbiological, fuel, and materials communities, delved into the unique materials and chemical challenges that occur with production, transport, and storage of alternative fuels. Discussions focused on specific problems including: a) the changing composition of "drop-in" fuels and the impact of that composition on materials; b) the influence of microbial populations on corrosion and fuel quality; and c) state-of-the-art measurement technologies for monitoring material degradation and biofilm formation.
C1 [Mansfield, Elisabeth; Sowards, Jeffrey W.] NIST, Boulder, CO 80305 USA.
[Crookes-Goodson, Wendy J.] Air Force Res Lab, Soft Matter Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mansfield, E (reprint author), NIST, Boulder, CO 80305 USA.
EM elisabeth.mansfield@nist.gov; jeffrey.sowards@nist.gov;
Wendy.goodson.1@us.af.mil
NR 15
TC 0
Z9 0
U1 2
U2 4
PU US GOVERNMENT PRINTING OFFICE
PI WASHINGTON
PA SUPERINTENDENT DOCUMENTS,, WASHINGTON, DC 20402-9325 USA
SN 1044-677X
J9 J RES NATL INST STAN
JI J. Res. Natl. Inst. Stand. Technol.
PD MAR 11
PY 2015
VL 120
DI 10.6028/jres.120.003
PG 9
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA CN8VX
UT WOS:000358724800001
PM 26958436
ER
PT J
AU Wei, LL
Pados, DA
Batalama, SN
Hu, RQ
Medley, MJ
AF Wei, Lili
Pados, Dimitris A.
Batalama, Stella N.
Hu, Rose Qingyang
Medley, Michael J.
TI Optimal multiuser spread-spectrum data hiding in digital images
SO SECURITY AND COMMUNICATION NETWORKS
LA English
DT Article
DE covert communications; code-division multiplexing; data concealment;
data embedding; data hiding; multiuser communicatios;
signal-to-interference-plus-noise ratio; steganography; sum capacity;
watermarking
ID TOTAL-SQUARED-CORRELATION; BINARY SIGNATURE SETS; KARYSTINOS-PADOS
BOUNDS; WATERMARKING TECHNIQUES; INTERFERENCE AVOIDANCE; CAPACITY;
DESIGN; STEGANOGRAPHY; MULTIMEDIA; CHANNELS
AB In this work, we intend to carry out optimized spread-spectrum concealment of multiuser data under a given digital image. First, the overall image is pre-processed into transform-domain small blocks from which host vectors are obtained via zig-zag scanning vectorization. Multiuser data hiding is performed in the generated host vectors. Under this data hiding system model, we give an orthogonal set of embedding spread-spectrum signatures that achieves maximum sum signal-to-interference-plus-noise ratio at the output of the linear-filter receivers for any fixed embedding amplitude values. Then, for any given total embedding distortion constraint, we present the optimal multi-signature assignment and amplitude allocation that maximizes the sum capacity of the concealment procedure. The practical implication of the results is sum signal-to-interference-plus-noise ratio, sum-capacity optimal multiuser/multi-signature spread-spectrum data hiding in the digital image medium. Numerical results demonstrate the effectiveness of the proposed methods. Copyright (c) 2014 John Wiley & Sons, Ltd.
C1 [Wei, Lili; Hu, Rose Qingyang] Utah State Univ, Dept Elect & Comp Engn, Logan, UT 84322 USA.
[Pados, Dimitris A.; Batalama, Stella N.] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
[Medley, Michael J.] US Air Force, Res Lab, RITE, Rome, NY 13441 USA.
RP Hu, RQ (reprint author), Utah State Univ, Dept Elect & Comp Engn, Logan, UT 84322 USA.
EM rosehu@ieee.org
FU Air Force Office of Scientific Research [FA9550-12-1-0123]
FX This work was supported by the Air Force Office of Scientific Research
under Grant FA9550-12-1-0123. Approved for Public Release; Distribution
Unlimited:88ABW-2009-4428.
NR 35
TC 1
Z9 1
U1 2
U2 20
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1939-0114
EI 1939-0122
J9 SECUR COMMUN NETW
JI Secur. Commun. Netw.
PD MAR 10
PY 2015
VL 8
IS 4
BP 540
EP 549
DI 10.1002/sec.1001
PG 10
WC Computer Science, Information Systems; Telecommunications
SC Computer Science; Telecommunications
GA AZ3RA
UT WOS:000348143200002
ER
PT J
AU Estepp, JR
Christensen, JC
AF Estepp, Justin R.
Christensen, James C.
TI Electrode replacement does not affect classification accuracy in
dual-session use of a passive brain-computer interface for assessing
cognitive workload
SO FRONTIERS IN NEUROSCIENCE
LA English
DT Article
DE passive brain computer interface; cognitive state;
electroencephalography; machine learning; non-stationarity
ID FUNCTIONAL-STATE CLASSIFICATION; HIGH-RESOLUTION EEG;
PSYCHOPHYSIOLOGICAL MEASURES; ADAPTIVE AUTOMATION; DETECTION ALGORITHM;
OCULAR ARTIFACTS; TASK-DIFFICULTY; NEURAL-NETWORKS; MOTOR IMAGERY;
SYSTEM
AB The passive brain-computer interface (pBCI) framework has been shown to be a very promising construct for assessing cognitive and affective state in both individuals and teams. There is a growing body of work that focuses on solving the challenges of transitioning pBCI systems from the research laboratory environment to practical, everyday use. An interesting issue is what impact methodological variability may have on the ability to reliably identify (neuro)physiological patterns that are useful for state assessment. This work aimed at quantifying the effects of methodological variability in a pBCI design for detecting changes in cognitive workload. Specific focus was directed toward the effects of replacing electrodes over dual sessions (thus inducing changes in placement, electromechanical properties, and/or impedance between the electrode and skin surface) on the accuracy of several machine learning approaches in a binary classification problem. In investigating these methodological variables, it was determined that the removal and replacement of the electrode suite between sessions does not impact the accuracy of a number of learning approaches when trained on one session and tested on a second. This finding was confirmed by comparing to a control group for which the electrode suite was not replaced between sessions. This result suggests that sensors (both neurological and peripheral) may be removed and replaced over the course of many interactions with a pBCI system without affecting its performance. Future work on multi-session and multi-day pBCI system use should seek to replicate this (lack of) effect between sessions in other tasks, temporal time courses, and data analytic approaches while also focusing on non-stationarity and variable classification performance due to intrinsic factors.
C1 [Estepp, Justin R.; Christensen, James C.] Air Force Res Lab, Appl Neurosci Branch, Human Effectiveness Directorate, Human Performance Wing 711, Wright Patterson AFB, OH 45433 USA.
RP Estepp, JR (reprint author), Air Force Res Lab, Human Performance Wing 711, 711 HPW RHCP,BLDG 840,W200,2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
EM justin.estepp@us.af.mil
FU Air Force Office of Scientific Research
FX The authors would like to thank William D. Miller, Jr. (Science,
Mathematics and Research for Transformation Fellow, George Mason
University) for his ongoing commitment to AF-MATB software development,
Iris E. Davis, Margaret A. Bowers, and Samantha L. Klosterman (Ball
Aerospace and Technologies Corp.) for their substantial efforts during
data collection for this study and contributions in preparing this
manuscript, and Dr. Glenn E Wilson (Air Force Research Laboratory
Emeritus, and Physiometrex, Inc.) for his helpful discussions about and
contributions to study design. This work was supported by the Air Force
Office of Scientific Research.
NR 86
TC 2
Z9 2
U1 2
U2 12
PU FRONTIERS MEDIA SA
PI LAUSANNE
PA PO BOX 110, EPFL INNOVATION PARK, BUILDING I, LAUSANNE, 1015,
SWITZERLAND
SN 1662-453X
J9 FRONT NEUROSCI-SWITZ
JI Front. Neurosci.
PD MAR 9
PY 2015
VL 9
AR 54
DI 10.3389/fnins.2015.00054
PG 20
WC Neurosciences
SC Neurosciences & Neurology
GA CG0OS
UT WOS:000352966500001
PM 25805963
ER
PT J
AU Castro-Palacio, JC
Bemish, RJ
Meuwly, M
AF Castro-Palacio, Juan Carlos
Bemish, Raymond J.
Meuwly, Markus
TI Communication: Equilibrium rate coefficients from atomistic simulations:
The O(P-3) + NO((2)Pi) -> O-2(X-3 Sigma(-)(g)) + N(S-4) reaction at
temperatures relevant to the hypersonic flight regime
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID POTENTIAL-ENERGY SURFACES; ABSORPTION CROSS-SECTIONS; VISIBLE REGION;
RATE CONSTANTS; NO2; OXYGEN; UV
AB The O(P-3) + NO((2)Pi) -> O-2(X-3 Sigma(-)(g)) + N(S-4) reaction is among the N- and O-involving reactions that dominate the energetics of the reactive air flow around spacecraft during hypersonic atmospheric re-entry. In this regime, the temperature in the bow shock typically ranges from 1000 to 20 000 K. The forward and reverse rate coefficients for this reaction derived directly from trajectory calculations over this range of temperature are reported in this letter. Results compare well with the established equilibrium constants for the same reaction from thermodynamic quantities derived from spectroscopy in the gas phase which paves the way for large-scale in silico investigations of equilibrium rates under extreme conditions. (c) 2015 AIP Publishing LLC.
C1 [Castro-Palacio, Juan Carlos; Meuwly, Markus] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland.
[Bemish, Raymond J.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Meuwly, Markus] Brown Univ, Dept Chem, Providence, RI 02912 USA.
RP Meuwly, M (reprint author), Univ Basel, Dept Chem, Klingelbergstr 80, CH-4056 Basel, Switzerland.
EM m.meuwly@unibas.ch
FU United State Department of the Air Force; Swiss National Science
Foundation [200021-117810]; NCCR MUST; University of Basel
FX Part of this work was supported by the United State Department of the
Air Force which is gratefully acknowledged (J.C.C.P.) Support by the
Swiss National Science Foundation through Grant Nos. 200021-117810, the
NCCR MUST (M.M.), and the University of Basel is also acknowledged.
NR 20
TC 3
Z9 3
U1 4
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 7
PY 2015
VL 142
IS 9
AR 091104
DI 10.1063/1.4913975
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA CD3JH
UT WOS:000350973900004
PM 25747053
ER
PT J
AU Ombrello, T
Carter, C
McCall, J
Schauer, F
Naples, A
Hoke, J
Hsu, KY
AF Ombrello, Timothy
Carter, Campbell
McCall, Jonathan
Schauer, Frederick
Naples, Andrew
Hoke, John
Hsu, Kuang-Yu
TI Enhanced Mixing in Supersonic Flow Using a Pulse Detonator
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID TRANSVERSE INJECTION; PART 1; SCRAMJET; COMBUSTION; IGNITION; STRUT
AB Mixing enhancement in a M = 2 crossflow using the transient high-pressure, high-temperature, and high-velocity pulse from a detonation was investigated experimentally. High-frame-rate shadowgraphy and planar laser-induced fluorescence of the nitric oxide molecule showed the structure and time-dependent interaction of the detonation plume with the supersonic flow. The high-momentum flux from the detonation provided significant penetration, with blowdown times of 4-8 ms achieved. Planar laser-induced fluorescence of nitric oxide captured the spanwise structure of the plume and the large counter-rotating vortex structure for enhanced mixing. The upstream jet was shown to be drawn into the pulse detonator's plume, providing distribution to the core supersonic flow. Significant coupling between a continuous upstream jet and the pulse detonator plume was found and indicated that there was an optimal staging distance for enhanced mixing.
C1 [Ombrello, Timothy; Carter, Campbell; McCall, Jonathan] US Air Force Res Lab, High Speed Syst Div, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Schauer, Frederick] US Air Force Res Lab, Turbine Engine Div, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Naples, Andrew; Hoke, John; Hsu, Kuang-Yu] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
RP Ombrello, T (reprint author), US Air Force Res Lab, High Speed Syst Div, Aerosp Syst Directorate, 1950 Fifth Street, Wright Patterson AFB, OH 45433 USA.
FU Air Force Office of Scientific Research
FX Part of the research was performed while the Corresponding Author held a
National Research Council Research Associateship Award at the U.S. Air
Force Research Laboratory at Wright-Patterson Air Force Base. The work
was also supported by the Air Force Office of Scientific Research. The
authors wish to thank William Terry and Dave Schommer for their help
with the experiments.
NR 23
TC 3
Z9 3
U1 2
U2 11
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD MAR-APR
PY 2015
VL 31
IS 2
BP 654
EP 663
DI 10.2514/1.B35316
PG 10
WC Engineering, Aerospace
SC Engineering
GA CQ8EM
UT WOS:000360839300016
ER
PT J
AU Prince, BD
Bemish, RJ
Chiu, YH
AF Prince, Benjamin D.
Bemish, Raymond J.
Chiu, Yu-Hui
TI Emission-Excitation Cross Sections Relevant to Krypton-Propelled
Electric Thrusters
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID HALL THRUSTER; PROPULSION; XENON; PLUME
AB Emission-excitation cross sections for collision processes relevant to krypton-propelled Hall effect and ion thrusters are measured using optical emission spectroscopy in the 350-1000 nm spectral range. Absolute spectral radiances were recorded for collisions between beams of krypton ions (either singly or doubly charged) and electrons with a Kr gas at charged particle energies relevant to electrostatic thruster plasmas. The most prominent emissions observed are in the near-infrared region from a low-lying excited electronic state of neutral Kr. In the case of Kr+/Kr2+ + Kr systems, the emission-excitation cross section from this low-lying excited electronic state of neutral Kr has a threshold at approximately 12.5 eV in the center-of-mass frame, and it increases with collision energy until 200 eV, where it remains constant through 600 eV. The energy dependence of cross sections for emission from Kr II varies with the colliding charged particle. The threshold for the radiative emission of Kr II is estimated at, in the center-of-mass frame, between 40 and 50 eV for Kr+ + Kr ,<25 eV for Kr2+ + Kr and between electron energies of 29.9 and 34.4 eV for e(-) + Kr. The ion-impact rate coefficients indicate that near-infrared radiative emission resulting from ionneutral collisions is important below an electron temperature of 10 eV. Potential diagnostic lines to be used for determination of electron temperatures and an initial two-line collisional-radiative model derived from these laboratory measurements are discussed.
C1 [Prince, Benjamin D.; Bemish, Raymond J.] US Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Chiu, Yu-Hui] Busek Co Inc, Natick, MA 01760 USA.
RP Prince, BD (reprint author), US Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen, Kirtland AFB, NM 87117 USA.
OI Bemish, Raymond/0000-0003-2974-1534
FU U.S. Air Force Office of Scientific Research [13RV07COR]
FX Support for this work by the U.S. Air Force Office of Scientific
Research through task 13RV07COR (Program Manager: Ali Sayir) is
gratefully acknowledged.
NR 26
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U1 0
U2 3
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD MAR-APR
PY 2015
VL 31
IS 2
BP 725
EP 736
DI 10.2514/1.B35306
PG 12
WC Engineering, Aerospace
SC Engineering
GA CQ8EM
UT WOS:000360839300023
ER
PT J
AU Dong, L
Kong, FT
Gu, GC
Hawkins, TW
Jones, M
Parsons, J
Kalichevsky-Dong, MT
Saitoh, K
Pulford, B
Dajani, I
AF Dong, Liang
Kong, Fanting
Gu, Guancheng
Hawkins, Thomas Wade
Jones, Maxwell
Parsons, Joshua
Kalichevsky-Dong, Monica T.
Saitoh, Kunimasa
Pulford, Benjamin
Dajani, Iyad
TI Large-Mode-Area All-Solid Photonic Bandgap Fibers for the Mitigation of
Optical Nonlinearities
SO IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
LA English
DT Article
DE Optical fiber lasers; optical fiber amplifiers; optical fibers
ID HIGHER-ORDER MODES; SINGLE-MODE; POWER; AMPLIFIER; NM; SUPPRESSION;
INSTABILITY; DESIGN
AB There is still significant need for power scaling of fiber lasers. Large-mode-area fibers are a key for the mitigation of optical nonlinearities. In recent years, mode instability has shown itself to be an additional significant limiting factor for single-mode power scaling in the regime of a few hundred watts to kilowatts. It is better appreciated now that further power scaling requires significant high-order-mode suppression in addition to a large effective mode area in a fiber. In recent years, we have shown that all-solid photonic bandgap fibers are a superior approach due to their unsurpassed higher-order-mode suppression in large-mode-area designs, making them well suited for applications at high average powers. We will review of some of the recent progress, challenges, and prospects of all-solid photonic bandgap fibers in this invited paper.
C1 [Dong, Liang; Kong, Fanting; Gu, Guancheng; Hawkins, Thomas Wade; Jones, Maxwell; Parsons, Joshua; Kalichevsky-Dong, Monica T.] Clemson Univ, Anderson, SC 29625 USA.
[Saitoh, Kunimasa] Hokkaido Univ, Grad Sch Informat Sci & Technol, Sapporo, Hokkaido 0600814, Japan.
[Pulford, Benjamin; Dajani, Iyad] Kirtland Air Force Base, Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Dong, L (reprint author), Clemson Univ, Anderson, SC 29625 USA.
EM dong4@clemson.edu; fantink@clemson.edu; ggu@clemson.edu;
hawkin2@clemson.edu; maxwel6@clemson.edu; parson2@clemson.edu;
mkalich@clemson.edu; ksaitoh@ist.hokudai.ac.jp;
benjamin.pulford@us.af.mil; iyad.dajani@us.af.mil
FU U.S. Army Research Laboratory; U.S. Army Research Office through Joint
Technology Office MRI program [W911NF-10-1-0423]
FX This work was supported in part by the U.S. Army Research Laboratory and
the U.S. Army Research Office under Contract/Grant W911NF-10-1-0423
through a Joint Technology Office MRI program.
NR 36
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Z9 0
U1 1
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1077-260X
EI 1558-4542
J9 IEEE J SEL TOP QUANT
JI IEEE J. Sel. Top. Quantum Electron.
PD MAR-APR
PY 2015
VL 22
IS 2
AR 4900207
DI 10.1109/JSTQE.2015.2451012
PG 7
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA CQ7NI
UT WOS:000360790500001
ER
PT J
AU Carrese, PO
AF Carrese, Paul O.
TI Constitutionalist Political Science: Rediscovering Storing's
Philosophical Moderation
SO AMERICAN POLITICAL THOUGHT
LA English
DT Article
ID CRITIQUE; ESSAYS
AB In an era concerned with dysfunction in American politics, polarization, and the relevance of academia for ameliorating these problems, the fiftieth anniversary of a debate about American political science permits rediscovery of the philosophical balance and breadth of Herbert Storing. His constitutionalist political science embodied a broad conception of American principles that emphasized founding debates and their continuing echoes in policies and thought, as well as a post-Progressive appreciation for assessing ends and enduring truths of free government. Storing's science anticipates, but contrasts favorably with, the narrower methodological pluralism of the recent Perestroika movement; it developed a philosophical moderation that analyzed alternatives and extremes in both ideas and politics but appreciated intellectual and political blending that sought higher middle grounds; and it focused on leadership or statesmanship in a way that addresses worries over dysfunction, a leadership crisis, and academic relevance more constructively than alternative models of American political science.
C1 US Air Force Acad, Polit Sci, Colorado Springs, CO 80840 USA.
RP Carrese, PO (reprint author), US Air Force Acad, Polit Sci, 6L116 Fairchild Hall, Colorado Springs, CO 80840 USA.
EM paul.carrese@usafa.edu
NR 64
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 2161-1580
EI 2161-1599
J9 AM POLIT THOUGHT
JI Am. Polit. Thought
PD SPR
PY 2015
VL 4
IS 2
BP 259
EP 288
DI 10.1086/680391
PG 30
WC Political Science
SC Government & Law
GA CO1TC
UT WOS:000358937100004
ER
PT J
AU Goff, GM
Showalter, D
Black, JT
Beck, JA
AF Goff, Gary M.
Showalter, Daniel
Black, Jonathan T.
Beck, Joseph A.
TI Parameter Requirements for Noncooperative Satellite Maneuver
Reconstruction Using Adaptive Filters
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID ORBIT DETERMINATION; PROPAGATION; SPACECRAFT
AB The Responsive Orbits division of the Center for Space Research and Assurance in the Aeronautics and Astronautics Department of the Air Force Institute of Technology investigates short-term tactical satellite missions that require frequent maneuvers. Pairing research in designing and conducting avoidance maneuvers with research in detecting and tracking maneuvering satellites sets the stage for developing and improving both areas. Strategies in stochastic filtering, smoothing, multiple model adaptive estimation, and maneuver reconstruction are developed to track a high-priority satellite. The article develops a wide range of simulations that modify the maneuver type, tracking antenna performance, antenna coverage, reconstruction method, filtering approach, and number of postmaneuver passes collected. The results determine the levels of error covariance necessary to perform successful maneuver reconstructions. Additionally, the results provide maneuver reconstruction confidence percentages based on the estimated covariance and number of postmaneuver passes.
C1 [Goff, Gary M.; Showalter, Daniel; Black, Jonathan T.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Beck, Joseph A.] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Goff, GM (reprint author), US Air Force, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RI Black, Jonathan/R-4875-2016
OI Black, Jonathan/0000-0001-9315-3994
NR 39
TC 2
Z9 2
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD MAR
PY 2015
VL 38
IS 3
BP 361
EP 374
DI 10.2514/1.G000941
PG 14
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CO7BG
UT WOS:000359311900001
ER
PT J
AU Sherrill, RE
Sinclair, AJ
Lovell, TA
AF Sherrill, Ryan E.
Sinclair, Andrew J.
Lovell, T. Alan
TI Virtual-Chief Generalization of Hill-Clohessy-Wiltshire to Elliptic
Orbits
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID RELATIVE MOTION
C1 [Sherrill, Ryan E.; Sinclair, Andrew J.] Auburn Univ, Dept Aerosp Engn, Auburn, AL 36849 USA.
[Lovell, T. Alan] US Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Sherrill, RE (reprint author), US Air Force Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
RI Sinclair, Andrew/H-2156-2013
NR 14
TC 0
Z9 0
U1 3
U2 6
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD MAR
PY 2015
VL 38
IS 3
BP 523
EP 527
DI 10.2514/1.G000110
PG 5
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA CO7BG
UT WOS:000359311900014
ER
PT J
AU Konkova, T
Mironov, S
Korznikov, A
Korznikova, G
Myshlyaev, MM
Semiatin, SL
AF Konkova, T.
Mironov, S.
Korznikov, A.
Korznikova, G.
Myshlyaev, M. M.
Semiatin, S. L.
TI An EBSD investigation of cryogenically-rolled Cu-30%Zn brass
SO MATERIALS CHARACTERIZATION
LA English
DT Article
DE Cu-30Zn brass; Grain refinement; Cryogenic deformation; Electron
backscatter diffraction; Grain structure; Texture
ID POLYCRYSTALLINE FCC METALS; MG-SI ALLOY; MECHANICAL-PROPERTIES; ROLLING
TEXTURES; DEFORMATION; COPPER; MICROSTRUCTURE
AB Electron backscatter diffraction was used to study grain structure development in heavily cryogenically-rolled Cu-30%Zn brass. The produced microstructure was found to be very inhomogeneous. At a relatively coarse scale, it consisted of texture bands having crystallographic orientations close to the alpha- and gamma-fibers. The texture bands contained internal structure comprising shear bands, mechanical twins, and low-angle boundaries. Such features were more pronounced within the gamma-fiber, and this resulted in a heterogeneous ultrafine grain structure. The cryogenic rolling was concluded to be not straightforward for production of nanocrystalline grain structure in Cu-30%Zn brass. (C) 2015 Elsevier Inc. All rights reserved.
C1 [Konkova, T.; Mironov, S.; Korznikov, A.; Korznikova, G.] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia.
[Mironov, S.] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan.
[Korznikov, A.] Natl Res Tomsk State Univ, Tomsk 634050, Russia.
[Myshlyaev, M. M.] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia.
[Semiatin, S. L.] US Air Force, Res Lab, Mat & Mfg Directorate, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
RP Mironov, S (reprint author), Tohoku Univ, Grad Sch Engn, Dept Mat Proc, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
EM smironov@material.tohoku.ac.jp
RI Korznikov, Alexander/F-1473-2014; SEMIATIN, SHELDON/E-7264-2017;
OI Korznikova, Galiya/0000-0001-6646-7357
FU Russian Fund of Fundamental Research [14-02-97004]
FX Financial support from the Russian Fund of Fundamental Research (project
No. 14-02-97004) is gratefully acknowledged. The authors are grateful to
P. Klassman for technical assistance during cryogenic rolling.
NR 13
TC 8
Z9 8
U1 1
U2 11
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1044-5803
EI 1873-4189
J9 MATER CHARACT
JI Mater. Charact.
PD MAR
PY 2015
VL 101
BP 173
EP 179
DI 10.1016/j.matchar.2015.02.004
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Materials Science, Characterization & Testing
SC Materials Science; Metallurgy & Metallurgical Engineering
GA CL7IQ
UT WOS:000357146100023
ER
PT J
AU Garmann, DJ
Visbal, MR
AF Garmann, D. J.
Visbal, M. R.
TI Interactions of a streamwise-oriented vortex with a finite wing
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE vortex dynamics; vortex flows; vortex interactions
ID LARGE-EDDY SIMULATION; FORMATION FLIGHT; VORTICES; IMPLICIT; FLOW;
EQUATIONS; SCHEMES; GRIDS; BIRDS
AB A canonical study is developed to investigate the unsteady interactions of a streamwise-oriented vortex impinging upon a finite surface using high-fidelity simulation. As a model problem, an analytically defined vortex superimposed on a free stream is convected towards an aspect-ratio-six (AR = 6) plate oriented at an angle of alpha = 4 degrees and Reynolds number of Re = 20 000 in order to characterize the unsteady modes of interaction resulting from different spanwise positions of the incoming vortex. Outboard, tip-aligned and inboard positioning are shown to produce three distinct flow regimes: when the vortex is positioned outboard of, but in close proximity to, the wingtip, it pairs with the tip vortex to form a dipole that propels itself away from the plate through mutual induction, and also leads to an enhancement of the tip vortex. When the incoming vortex is aligned with the wingtip, the tip vortex is initially strengthened by the proximity of the incident vortex, but both structures attenuate into the wake as instabilities arise in the pair's feeding sheets from the entrainment of opposite-signed vorticity into either structure. Finally, when the incident vortex is positioned inboard of the wingtip, the vortex bifurcates in the time-mean sense with portions convecting above and below the wing, and the tip vortex is mostly suppressed. The time-mean bifurcation is actually a result of an unsteady spiralling instability in the vortex core that reorients the vortex as it impacts the leading edge, pinches off, and alternately attaches to either side of the wing. The increased effective angle of attack inboard of impingement enhances the three-dimensional recirculation region created by the separated boundary layer off the leading edge which draws fluid from the incident vortex inboard and diminishes its impact on the outboard section of the wing. The slight but remaining downwash present outboard of impingement reduces the effective angle of attack in that region, resulting in a small separation bubble on either side of the wing in the time-mean solution, effectively unloading the tip outboard of impingement and suppressing the tip vortex. All incident vortex positions provide substantial increases in the wing's lift-to-drag ratio; however, significant sustained rolling moments also result. As the vortex is brought inboard, the rolling moment diminishes and eventually switches sign as the reduced outboard loading balances the augmented sectional lift inboard of impingement.
C1 [Garmann, D. J.; Visbal, M. R.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Garmann, DJ (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Daniel.Garmann@us.af.mil
FU AFOSR
FX This work is supported in part by AFOSR under a task monitored by Dr D.
Smith and also by a grant of HPC time from the DoD HPC Shared Resource
Centers at AFRL and ERDC.
NR 43
TC 3
Z9 3
U1 1
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
EI 1469-7645
J9 J FLUID MECH
JI J. Fluid Mech.
PD MAR
PY 2015
VL 767
BP 782
EP 810
DI 10.1017/jfm.2015.51
PG 29
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA CL5MY
UT WOS:000357005200004
ER
PT J
AU Zhang, LM
Steckling, B
Lucero, A
Schmitt-Sody, A
White, W
Shiffler, D
AF Zhang, Liangmin
Steckling, Benjamin
Lucero, Adrian
Schmitt-Sody, Andreas
White, William
Shiffler, Donald
TI Third-order optical nonlinearity effect of DNA- and
polyvinylpyrrolidone-functionalized carbon nanotubes
SO JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
LA English
DT Article
DE Multiwalled carbon nanotube; third-order optical nonlinear
susceptibility; optical power limiting; nonlinear optical absorption;
z-scan technique
ID SOLUBILIZATION; SEPARATION; WATER
AB We have used single-stranded DNA (ssDNA) and polyvinylpyrrolidone (PVP) to disperse multiwalled carbon nanotubes (MWNTs) in water solution through sonication and centrifuge procedures. The advantage of these two polymers is that they do not need toxic organic solvents to distribute the carbon nanotubes. The scanning electron microscope (SEM) technique has been used to investigate the interaction between polymer molecules and MWNTs. The images show that MWNTs can be distributed effectively into the two polymer solutions. The third-order optical susceptibility, nonlinear optical absorption coefficient and optical power limiting of these dispersions have been characterized experimentally using a femtosecond laser system with a tunable range of 750-850 nm. The imaginary part of the third-order optical susceptibility has also been computed.
C1 [Zhang, Liangmin] Calif State Univ Stanislaus, Dept Phys Phys Sci & Geol, Turlock, CA 95382 USA.
[Steckling, Benjamin] Arkansas State Univ, Dept Chem & Phys, Arkansas Ctr Laser Applicat & Sci, State Univ, AR 72467 USA.
[Lucero, Adrian; Schmitt-Sody, Andreas; White, William; Shiffler, Donald] Kirtland Air Force Base, Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Zhang, LM (reprint author), Calif State Univ Stanislaus, Dept Phys Phys Sci & Geol, Turlock, CA 95382 USA.
EM lzhang@csustan.edu
FU ASEE [FA 9550-09-C-0114]
FX We would like to thank Julieanne Heffernan, Sabrina Maestas and Brant
Danner for the assistance in completion of this work. We are also
grateful to the grant support from ASEE, Grant No. FA 9550-09-C-0114.
NR 22
TC 0
Z9 0
U1 5
U2 9
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-8635
EI 1793-6624
J9 J NONLINEAR OPT PHYS
JI J. Nonlinear Opt. Phys. Mater.
PD MAR
PY 2015
VL 24
IS 1
AR 1550008
DI 10.1142/S0218863515500083
PG 10
WC Optics; Physics, Applied
SC Optics; Physics
GA CJ8KS
UT WOS:000355749800008
ER
EF