FN Thomson Reuters Web of Science™
VR 1.0
PT S
AU Yachbes, I
Roopnarine
Sadick, S
Arritt, B
Gardenier, CHE
AF Yachbes, Irene
Roopnarine
Sadick, Shazad
Arritt, Brandon
Gardenier, Captain H. E.
GP IEEE
TI Rapid Assembly of Spacecraft Structures for Responsive Space
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB The ORS office has been chartered with developing the architecture that will allow a customized satellite to be designed, produced, deployed, and operational within a matter of days [1]. (12)Every aspect of the spacecraft development process needs to be reassessed in order to achieve this ambitious responsive spacecraft architecture. Assembly, integration & testing could be drastically reduced by stocking component-ready modular panels for assembly., However, the assembly of the structure itself needs to be change from the current process of securing panels with dozens of mixed-size fasteners and the associated verification, tooling, and documentation. Additionally, the new process must take into consideration the need to pass electrical and thermal connections throughout the satellite bus in a time-effective manner. A method for rapidly providing a stiff mechanical attachment across panels of a spacecraft bus while simultaneously providing electrical and thermal continuity would help to realize the goals of ORS. In collaboration with the Air Force Research Laboratory/Space Vehicles Directorate, Honeybee Robotics Spacecraft Mechanisms Corporation has developed a fastening strategy for enabling rapid assembly of a spacecraft bus structure using our patented Quick Insertion Nut (QIN) technology. square square With this approach, a standard bolt can be rapidly inserted into the QIN and then about one turn is required to preload the connection, without significant support equipment or operator skill. These QINs are embedded in manifolds (the manifold includes panel-to-panel electrical interconnects) that together comprise a skeleton/frame for the spacecraft panels. When the panels are assembled to the manifolds, a robust structural, electrical and thermal connection for the bus is achieved. With this method, it is possible to also quickly disassemble bus panels. to swap out faulty components, accommodate upgrades, or support last-minute component changes to satisfy changing mission needs. While the concept is simple, when extrapolated across the multiple fasteners in a typical spacecraft bus (the time for threading of each bolt alone is eight to ten times faster), this results in a revolutionary decrease in the amount of time required for spacecraft assembly. With adequate margin and analysis, it may be possible that time-consuming dedicated system-level analysis and tests could also be eliminated from the AI&T process. View the video of our feasibility demonstration using a subscale prototype at: http://www.honeybeerobotics.com/168/Assembly4.mov - a representative "corner" of three satellite panels assembled using the QIN fasteners, manifold and electrical connection.
C1 [Yachbes, Irene; Roopnarine; Sadick, Shazad] Honeybee Robot Spacecraft Mech Corp, 460 W 34th St, New York, NY 10001 USA.
[Arritt, Brandon; Gardenier, Captain H. E.] Space Vehicles Directorate, AF Res Lab, Kirtland AFB, NM 87117 USA.
RP Yachbes, I (reprint author), Honeybee Robot Spacecraft Mech Corp, 460 W 34th St, New York, NY 10001 USA.
EM yachbes@honeybeerobotics.com; afrl.vssv@kirtland.af.mil
NR 9
TC 0
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U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 2518
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964000254
ER
PT S
AU Weaver, AD
Veth, MJ
AF Weaver, Adam D.
Veth, Michael J.
GP IEEE
TI Image-Based Relative Navigation for the Autonomous Refueling Problem
using Predictive Rendering
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB Autonomous aerial refueling requires a high level of accuracy and integrity. A great deal of research has been conducted in this problem area and has successfully demonstrated techniques with sufficient accuracy for fully autonomous refueling. Unfortunately, significantly less research has focused on the integrity of the relative navigation solution, especially in the presence of degraded sensor operation.
In this paper, we present an image-based relative navigation algorithm which uses a predictive rendering technique to determine the relative pose of a lead aircraft using a monocular imaging camera. The predictive rendering algorithm is developed using image processing techniques and the performance of the algorithm is evaluated from an observability perspective using flight test data. Three variations of the algorithm are analyzed: sum squared difference, magnitude of gradient, and gradient with threshold. The observability of translation and rotation errors is discussed for all three techniques, noting any significant issues for each approach. Overall, the predictive rendering algorithm is shown to provide an accurate estimate of the relative position and attitude to a lead aircraft using a monocular camera. In addition, the algorithm can be tuned to provide a measurement that emphasizes precision versus convergence stability based on the mission requirements.(12)
C1 [Weaver, Adam D.; Veth, Michael J.] USAF, Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH 45433 USA.
RP Weaver, AD (reprint author), USAF, Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH 45433 USA.
EM adam.weaver@afit.edu; michael.veth@afit.edu
NR 9
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PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 2951
EP 2963
PG 13
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001041
ER
PT S
AU Hendrix, CD
Veth, MJ
Carr, RW
AF Hendrix, Constance D.
Veth, Michael J.
Carr, Ryan W.
GP IEEE
TI LQG Control Design for a Hovering Micro Air Vehicle using an Optical
Tracking System
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB The need to conduct warfare in urban environments presents a new frontier for navigation and control of UAV's in locations where GPS may be degraded or denied. This paper addresses the first step in the development of a robust, non-GPS guidance, navigation, and targeting system for small indoor air vehicles: to design and validate a flight control system for micro aerial vehicles using an externally-mounted optical tracking system. The controller is designed using a modified Linear Quadratic Gaussian (LQG) technique which leverages the Unscented Kalman Filter (UKF) for state estimation. The controller is evaluated using a combination of simulation and flight test approaches conducted in the Air Force Research Laboratory's Micro Air Vehicle (MAV) Indoor Flight Facility. The results of the flight testing will be used to optimize the control design, which will pave the way for future research efforts, including incorporation of automated image processing techniques for vehicle stabilization.(12)
C1 [Hendrix, Constance D.; Veth, Michael J.; Carr, Ryan W.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Hendrix, CD (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM constance.hendrix@af.mil; michael.veth@af.mil; ryan.carr@wpafb.af.mil
NR 11
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3052
EP 3065
PG 14
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001051
ER
PT S
AU Shepherd, MJ
MacDonald, A
Gray, WR
Cobb, RG
AF Shepherd, Michael J.
MacDonald, Adam
Gray, William R., III
Cobb, Richard G.
GP IEEE
TI Limited Simulator Aircraft Handling Qualities Evaluation of an Adaptive
Controller
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB The paper details the application and handling qualities evaluation through computer-based simulation of an adaptive model reference controller acting on the longitudinal modes of a fighter-type aircraft. Whereas classical control designs depend largely on a priori knowledge of the system dynamics, adaptive control algorithms do not require the same degree of a priori sophistication, or alternately the same controller can be applied on a plant with varying dynamics such as experienced by an aircraft over a wide range of flight conditions. Although the applications of an adaptive controller are well understood, much of the existing research focuses on an adaptive controllers' ability to track a basic input (such as step, ramp, or sinusoid) over a range of time-varying plants. In this research the adaptive controller is evaluated through a series of pilot-in-the-loop tracking tasks utilizing the boundary avoidance tracking technique designed to highlight potential control difficulties which may lead to pilot-in-the-loop oscillations, task abandonment or loss of control. The results presented will serve as a precursor to flight tests of adaptive controllers on-board next generation fighter aircraft.
C1 [Shepherd, Michael J.; MacDonald, Adam; Gray, William R., III] USAF, Test Pilot Sch, 1220 S Wolfe Ave, Edwards AFB, CA 93524 USA.
[Cobb, Richard G.] Air Force Inst Technol, Wright Patterson AFB, OH USA.
RP Shepherd, MJ (reprint author), USAF, Test Pilot Sch, 1220 S Wolfe Ave, Edwards AFB, CA 93524 USA.
EM michael.shepherd@edwards.af.mil
FU USAF Test Pilot School and released [AFFTC PA-08472]
FX Funding for the presentation was provided by the USAF Test Pilot School
and released under AFFTC PA-08472. The authors wish to thank the test
pilot subjects for their contributions to this study.
NR 9
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3088
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001054
ER
PT S
AU Brown, D
Georgoulas, G
Bae, H
Vachtsevanos, G
Chen, R
Ho, YH
Tannenbaum, G
Schroeder, JB
AF Brown, D.
Georgoulas, G.
Bae, H.
Vachtsevanos, G.
Chen, R.
Ho, Y. H.
Tannenbaum, G.
Schroeder, J. B.
GP IEEE
TI Particle Filter Based Anomaly Detection for Aircraft Actuator Systems
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB This paper describes the background, simulation and experimental evaluation of an anomaly detector for Brushless DC motor winding insulation faults in the context of an aircraft Electro-Mechanical Actuator (EMA) application. Results acquired from an internal Failure Modes and Effects Analysis (FMEA) study identified turn-to-turn winding faults as the primary mechanism, or mode, of failure. Physics-of-failure mechanisms used to develop a model for the identified fault are provided. The model was implemented in Simulink to simulate the dynamics of the motor with a turn-to-turn insulation winding fault. Then, an experimental test procedure was devised and executed to validate the model. Additionally, a diagnostic feature, identified by the fault model and derived using Hilbert transforms, was validated using the Simulink model and experimental data for several fault dimensions. Next, a feature extraction routine preprocesses monitoring parameters and passes the resulting features to a particle filter. The particle filter, based on Bayesian estimation theory, allows for representation and management of uncertainty in a computationally efficient manner. The resulting anomaly detection routine declares a fault only when a specified confidence level is reached at a given false alarm rate. Finally, the real-time performance of the anomaly detector is evaluated using LabVIEW.(1,2)
C1 [Brown, D.; Georgoulas, G.; Bae, H.; Vachtsevanos, G.] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Chen, R.; Ho, Y. H.] Northrop Grumman Corp, El Segundo, CA 90245 USA.
[Tannenbaum, G.] Moog Inc, East Aurora, NY 14052 USA.
[Schroeder, J. B.] AFRL, RBCC, Wright Patterson AFB, OH USA.
RP Brown, D (reprint author), Georgia Inst Technol, Atlanta, GA 30332 USA.
EM gjv@ece.gatech.edu; robert.chen@ngc.com; gtannenbaum@moog.com;
john.schroeder@wpafb.af.mil
FU United States Air Force (USAF) [FA8650-06-C-7628]; USAF Air Force
Research Laboratory (AFRL); Air Vehicles Directorate (RB);
Wright-Patterson Air Force Base; AFRL/RBCC is the Air Force Technical
POC and Robert Chen is the NGC Program Manager and Principal
FX This work was performed under the United States Air Force (USAF)
contract number FA8650-06-C-7628. The program is sponsored by the USAF
Air Force Research Laboratory (AFRL) Air Vehicles Directorate (RB),
Wright-Patterson Air Force Base, Ohio. Mr. J.B. Schroeder, AFRL/RBCC is
the Air Force Technical POC and Robert Chen is the NGC Program Manager
and Principal Investigator. Georgia Institute of Technology (GA Tech)
lead the algorithm development and MOOG Aerospace provided actuator and
motor data. Tests presented herein were conducted at NGC.
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3537
EP +
PG 4
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001100
ER
PT S
AU Schroeder, JB
Clark, GJ
AF Schroeder, J. B.
Clark, Greg J.
GP IEEE
TI Developing Health Management for Current and Future Inventory Aircraft
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB Designing and implementing health management systems for current and future aircraft poses many challenges, including interfacing with legacy onboard and offboard hardware and software systems, determining and justifying new functional requirements, and validating and verifying a robust, scalable system. Lessons learned from a current research and development program as well as prior health management system development experiences are presented as a road map to focus on the process of system development and integration. This paper also provides an overview of the concept and the coordination required to develop a working health management system.(1)
C1 [Schroeder, J. B.] USAF, Res Lab, RBCC, 2310 8th St, Wright Patterson AFB, OH 45433 USA.
[Clark, Greg J.] Boeing Co, Phantom Works, Seattle, WA 98124 USA.
RP Schroeder, JB (reprint author), USAF, Res Lab, RBCC, 2310 8th St, Wright Patterson AFB, OH 45433 USA.
EM john.schroeder@wpafb.af.mil; gregory.j.clark@boeing.com
FU AFRL Sentient Adaptive Systems Technologies (SAST); Vehicle
Condition-based Maintenance [F33615-00-D-3052 DO 0073]; Naval Air
Warfare [N00421-05-C-0140]
FX The authors would like to acknowledge the efforts of the entire SAST
team including those at the Air Force, The Boeing Company, University of
Hawaii, and Referentia Systems Inc. This work is supported under the
AFRL Sentient Adaptive Systems Technologies (SAST) for Vehicle
Condition-based Maintenance contract F33615-00-D-3052 DO 0073. This
material is based upon work supported by the Naval Air Warfare Center
under contract number N00421-05-C-0140. 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 the Naval Air
Warfare Center
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3838
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001129
ER
PT B
AU Kramer, BA
AF Kramer, Brad A.
GP IEEE
TI Size Reduction of a Microstrip Antenna using a Corrugated Surface
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 AFRL, Wright Patterson AFB, OH USA.
RP Kramer, BA (reprint author), AFRL, Wright Patterson AFB, OH USA.
NR 4
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U1 0
U2 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 637
EP 640
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085400161
ER
PT B
AU Jaramillo-Henao, CA
Kempel, LC
Schneider, S
AF Jaramillo-Henao, Carlos A.
Kempel, Leo C.
Schneider, Stephen
GP IEEE
TI A Trough Leaky-wave Antenna
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 [Jaramillo-Henao, Carlos A.; Kempel, Leo C.] Michigan State Univ, E Lansing, MI 48824 USA.
[Schneider, Stephen] US Air Force, Res Lab, SNRR, Wright Patterson AFB, OH 45433 USA.
RP Jaramillo-Henao, CA (reprint author), Michigan State Univ, E Lansing, MI 48824 USA.
EM jarami15@egr.msu.edu; kempel@egr.msu.edu
NR 4
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 733
EP +
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085400185
ER
PT B
AU Herscovici, N
Tomasic, B
Ginn, J
Donisi, T
AF Herscovici, Naftali
Tomasic, Boris
Ginn, James
Donisi, Tony
GP IEEE
TI Scanning Characteristics of Aperture Coupled Fed Fragmented Microstrip
Arrays
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
AB The scanning characteristics of a certain class of Aperture Coupled Fed Fragmented Microstrip Antennas are presented. This type of antenna exhibits relatively wide-band performance and its scanning characteristics are investigated.
C1 [Herscovici, Naftali; Tomasic, Boris] USAF, Res Lab, Sensors Directorate, Bedford, MA 01731 USA.
[Ginn, James] Univ Cent Florida, Orlando, FL 32816 USA.
[Donisi, Tony] Ansoft Corp, Pittsburgh, PA 15219 USA.
RP Herscovici, N (reprint author), USAF, Res Lab, Sensors Directorate, Bedford, MA 01731 USA.
NR 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 1644
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085400413
ER
PT B
AU Chilton, RA
AF Chilton, Ryan A.
GP IEEE
TI A Process for Assembling Discontinuous Basis Functions on Structured
Hexahedral Grids
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 AFRL, Fairborn, OH 45433 USA.
RP Chilton, RA (reprint author), AFRL, Fairborn, OH 45433 USA.
NR 4
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 1660
EP 1663
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085400417
ER
PT B
AU Deng, H
Himed, B
AF Deng, Hai
Himed, Braham
GP IEEE
TI Detection of Low-Speed Ground Moving Targets Using MIMO Radar
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 [Deng, Hai] Univ North Texas, Denton, TX 76203 USA.
[Himed, Braham] US Air Force, Res Labs, Wright Patterson AFB, OH 45433 USA.
RP Deng, H (reprint author), Univ North Texas, Denton, TX 76203 USA.
EM hai.deng@unt.edu
NR 3
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 2535
EP +
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085401164
ER
PT B
AU Tomasic, B
Herscovici, N
AF Tomasic, Boris
Herscovici, Naftali
GP IEEE
TI ANALYSIS OF CYLINDRICAL ARRAY OF INFINITELY-LONG SLOTS FED BY CONNECTED
DIPOLES
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 [Tomasic, Boris; Herscovici, Naftali] AF Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
RP Tomasic, B (reprint author), AF Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
EM boris.tomasic@hanscom.af.mil
NR 3
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 2835
EP 2838
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085401239
ER
PT B
AU Lemon, R
Coulter, B
Archibald, S
Nguyen, C
AF Lemon, Randall
Coulter, Bruce
Archibald, Steve
Nguyen, Chau
GP IEEE
TI Interface Test Adapter Development & Maintenance Using a
Continuity/Insulation Automatic Test Station in Large Scale Test Systems
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
AB This abstract focuses on four key points with using the Continuity/Insulation Automatic Test Station (Cont/Insul ATE) set in a large scale system: (1) Setup of Cont/Insul ATE and software development for the Cont/Insul ATE; (2) Using the Cont/Insul ATE in prototype development; (3) Verification that multiple copies of Interface Test Adapters (ITAs) will be identical and wired correctly; and (4) Maintenance and repair of ITAs after delivery. A large scale system is defined as a system with multiple test stations at multiple locations and with multiple identical ITAs. This paper will review the advantages and disadvantages of a Cont/Insul ATE test station using cost and schedule impact during the various phases of designing new ITAs and maintaining the ITAs once they have been fielded. The Ground Minuteman Automatic Test System (GMATS) re-host project, completed by the 309th Software Maintenance Group (SMXG) at the Ogden Air Logistics Center (OO-ALC), will be used in this document as a test case.
The GMATS project fielded 18 test stations at 8 separate locations, 332 total ITAs with 39 unique configurations. The ITA development work involved building 39 prototype ITAs, verifying the prototype ITAs against their master wire lists, running it through a series of self-tests, integrating the prototype ITAs with the Test Program Set (TPS), building production ITAs and then verifying each production ITA was built correctly. A successful program, such as GMATS, demonstrates that having an asset such as a Cont/Insul ATE test station can dramatically improve on-time deliverables and lower costs to the end customers.
C1 [Lemon, Randall; Coulter, Bruce; Archibald, Steve; Nguyen, Chau] Hill AFB, Hill AFB, UT 84056 USA.
RP Lemon, R (reprint author), Hill AFB, 7278 4th St,Bldg 100, Hill AFB, UT 84056 USA.
EM randall.lemon@hill.af.mil; bruce.coulter@hill.af.mil;
steve.archibald@hill.af.mi; chau.nguyen@hill.af.mil
NR 0
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PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 105
EP 110
PG 6
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300021
ER
PT B
AU Eckersley, JE
Adams, W
AF Eckersley, Joseph E., III
Adams, William Larry, Jr.
GP IEEE
TI Achieving test program set transportability through interface design
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
AB For decades, the automatic test community has worked to develop hardware standardization and interface protocols that aid in mitigating the impact of equipment obsolescence on the repair and maintenance mission. The traditional view of Test Program Set (TPS) transportability in this environment has always been one of migrating a legacy TPS to a new hardware architecture design born out of a need to replace aging technology or provide new test capability. The Department of Defense (DoD) has recognized the benefit of standardizing automatic test systems (ATS) through policy guidance whose intent is to drive the services to a common configuration test environment, thereby reducing life cycle sustainment costs for all DoD systems. Today, hardware standardization has advanced to the point that many ATS look and function very similar to one another. However, there are two major hurdles that continuously thwart our efforts to develop a standard core test system, the lack of a standard UUT interface and the lack of an open architecture software design that facilitates operations in any environment and on any test system architecture. Automatic Test Markup Language (ATML) provides promise with regards to the development of standardized test software interfaces. Developing a standard hardware configuration for all test requirements is ultimately achievable with the technology currently available today except for one simple but hugely significant hurdle, the cost involved in re-hosting the myriad of test program sets currently in existence. Therefore, any significant advance in common interface design has to take into account the need to minimize the impact to existing test program sets. This paper will seek to explore the various technological possibilities for overcoming the barriers to true TPS transportability that exist in today's automatic test community.
C1 [Eckersley, Joseph E., III; Adams, William Larry, Jr.] USAF, Combat Sustainment Grp 742, Robins AFB, GA 31098 USA.
RP Eckersley, JE (reprint author), USAF, Combat Sustainment Grp 742, 460 Richard Ray Blvd,Ste 200, Robins AFB, GA 31098 USA.
EM joseph.eckersley@robins.af.mil; William.adams@robins.af.mil
NR 2
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 159
EP 161
PG 3
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300032
ER
PT B
AU Nguyen, N
Spencer, J
Oblander, M
Herbert, N
Bynum, C
AF Nguyen, Ngai
Spencer, Jacob
Oblander, Mark
Herbert, Nicholas
Bynum, Casey
GP IEEE
TI The Simplified TPS Encoding Process
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
AB The process of TPS development is an increasingly complicated endeavor. As Units Under Test become more and more complex, a greater investment of time for analysis and simulation is required than ever before. Additionally, traditional TPS software development environments are monolithic, necessitating costly training time for the engineer to learn the environment as well as forcing tedious and difficult development interfaces on the engineer.
The Simplified TPS Encoding Process (STEP), developed by the 76 SMXG at Tinker AFB, is a novel process for the development of TPSs that removes dependency on specific programming languages from the TPS engineer. STEP reduces the up-front time required to train new engineers and provides the TPS engineer with an easy-to-use development environment that can be modularly extended to work with any programming language or hardware interface. In addition, STEP uses plain text files to contain program code and store data results. The ease-of-use, modularity, and plain text source code provided by STEP result in the TPS engineer spending more time analyzing the Unit Under Test instead of spending that time struggling to develop in a particular programming language.
C1 [Nguyen, Ngai; Spencer, Jacob; Oblander, Mark; Herbert, Nicholas; Bynum, Casey] AFMC, Software Maintenance Grp 76, Tinker AFB, OK USA.
RP Nguyen, N (reprint author), AFMC, Software Maintenance Grp 76, Tinker AFB, OK USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 162
EP 166
PG 5
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300033
ER
PT B
AU Ray, B
Kosai, H
McNeal, S
Jordan, B
Scofield, J
AF Ray, Biswajit
Kosai, Hiroyuki
McNeal, Seana
Jordan, Brett
Scofield, James
GP IEEE
TI Performance Analysis of a Multi-Mode Interleaved Boost Converter
SO 2009 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Energy Conversion Congress and Exposition
CY SEP 20-24, 2009
CL San Jose, CA
SP IEEE
DE Boost converter; interleaving; continuous conduction mode; discontinuous
conduction mode
ID STEADY-STATE ANALYSIS; COUPLED INDUCTORS
AB Interleaved power converter topologies have received increasing attention in recent years for high performance applications. The advantages of coupled interleaved boost converters include increased efficiency, reduced size, reduced electromagnetic emission, faster transient response, and improved reliability. In this paper, a comprehensive performance analysis is presented for a multi-mode interleaved boost converter operating under the continuous conduction mode (CCM) and two discontinuous conduction modes (DCMs). With inductor coupling factor and converter loading as parameters, key performance indicators such as the de voltage gain, input ripple current, inductor ripple current, and output ripple voltage are presented in a normalized form to aid the converter design process. Transitions among the CCM and two DCM modes are clearly defined as part of the analysis. Advantages of DCM operation such as reduced switching loss at the expense of undesired ringing are discussed. The analysis presented is experimentally verified using a 250 W, 70 kHz prototype converter unit.
C1 [Ray, Biswajit] Bloomsburg Univ Penn, 400 E 2nd St, Bloomsburg, PA 17815 USA.
[Kosai, Hiroyuki] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[McNeal, Seana; Jordan, Brett; Scofield, James] AFRL, RZPE, Wright Patterson AFB, OH 45433 USA.
RP Ray, B (reprint author), Bloomsburg Univ Penn, 400 E 2nd St, Bloomsburg, PA 17815 USA.
NR 8
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2892-2
PY 2009
BP 2096
EP +
PG 2
WC Energy & Fuels; Engineering, Electrical & Electronic
SC Energy & Fuels; Engineering
GA BPQ32
UT WOS:000279630101015
ER
PT S
AU Liang, J
Liang, QL
Samn, SW
Narayanan, RM
AF Liang, Jing
Liang, Qilian
Samn, Sherwood W.
Narayanan, Ram M.
GP IEEE
TI Sense-Through-Wall Channel Modeling Using UWB Noise Radar
SO 2009 IEEE GLOBECOM WORKSHOPS
SE IEEE Globecom Workshops
LA English
DT Proceedings Paper
CT IEEE Globecom Workshops (Gc Workshops 2009)
CY NOV 30-DEC 04, 2009
CL Honolulu, HI
ID BANDWIDTH INDOOR CHANNEL; STATISTICAL-MODEL; PROPAGATION
AB Sensing-through-wall will benefit various applications such as emergence rescues and military operations. In order to add more signal processing functionality, it is vital to understand the characterization of sense-through-wall channel. In this paper, we propose a statistical channel model on a basis of real experimental data using UWB noise radar. We employ CLEAN algorithm to obtain the multipath channel impulse response (CIR) and observe that the channel amplitude at each path can be accurately characterized as T location-scale distribution. We also analyze that the multipath contributions arrive at the receiver are grouped into clusters. The time of arrival of clusters can be modeled as a Poisson arrival process, while within each cluster, subsequent multipath contributions or rays also arrive according to a Poisson process. However, these arrival rates are much smaller than those of indoor UWB channels.
C1 [Liang, Jing; Liang, Qilian] Univ Texas Arlington, Dept Elect Engn, Arlington, TX 76019 USA.
[Samn, Sherwood W.] US Air Force, Res Lab, HEX, San Antonio, TX 78235 USA.
[Narayanan, Ram M.] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.
RP Liang, J (reprint author), Univ Texas Arlington, Dept Elect Engn, Arlington, TX 76019 USA.
EM jliang@wcn.uta.edu; liang@uta.edu; Sherwood.samn@brooks.af.mil;
ram@engr.psu.edu
RI Liang, Jing/P-7093-2015
FU Office of Naval Research (ONR) [N00014-07-1-0395, N00014-07-1-1024];
National Science Foundation (NSF) [CNS-0721515, CNS-0831902]
FX This work was supported in part by Office of Naval Research (ONR) under
Grant N00014-07-1-0395 and N00014-07-1-1024, and National Science
Foundation (NSF) under Grant CNS-0721515 and CNS-0831902.
NR 19
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2166-0069
BN 978-1-4244-5624-6
J9 IEEE GLOBE WORK
PY 2009
BP 398
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BRU34
UT WOS:000283707400068
ER
PT S
AU Matungka, R
Zheng, YF
Ewing, RL
AF Matungka, Rittavee
Zheng, Yuan F.
Ewing, Robert L.
GP IEEE
TI AERIAL IMAGE REGISTRATION USING PROJECTIVE POLAR TRANSFORM
SO 2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL
PROCESSING, VOLS 1- 8, PROCEEDINGS
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech and Signal Processing
CY APR 19-24, 2009
CL Taipei, TAIWAN
SP IEEE, IEEE Signal Proc Soc
DE Aerial image registration; projective polar transform
ID TRANSLATION
AB Image registration is an essential step in many image processing applications that need visual information from multiple images for comparison, integration or analysis. Recently researchers have introduced image registration techniques using the log-polar transform (LPT) for its rotation and scale invariant properties. However, the accuracy of the approach limits by the number of samples used in the mapping process, which affects directly the computational cost. Motivated by the success of LPT based approach and its limitation, we propose a novel Projective Polar Transform (PPT) based image registration method that is robust to translation, scale, and rotation and yields high accuracy while requires low computational cost. Unlike LPT that 2D interpolation is needed in the mapping process, our method uses one-to-one mapping mechanism that directly arranges image from Cartesian to Polar coordinate according to pre-computed PPT map. An innovative projection mechanism is proposed to reduce the image from two to one dimensional vectors. With the proposed approach, the mapping procedure is accelerated and the matching process can be performed in 1D. This results in great reduction of the computational cost.
C1 [Matungka, Rittavee; Zheng, Yuan F.] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43212 USA.
[Ewing, Robert L.] US Air Force, IFTA, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Matungka, R (reprint author), Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43212 USA.
EM rmatungka@ece.osu.edu; zheng@ece.osu.edu
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4244-2353-8
J9 INT CONF ACOUST SPEE
PY 2009
BP 1061
EP +
DI 10.1109/ICASSP.2009.4959770
PG 2
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA BKQ01
UT WOS:000268919200266
ER
PT S
AU Martin, RK
Yan, CP
Fan, HH
AF Martin, Richard K.
Yan, Chunpeng
Fan, H. Howard
GP IEEE
TI BOUNDS ON DISTRIBUTED TDOA-BASED LOCALIZATION OF OFDM SOURCES
SO 2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL
PROCESSING, VOLS 1- 8, PROCEEDINGS
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech and Signal Processing
CY APR 19-24, 2009
CL Taipei, TAIWAN
SP IEEE, IEEE Signal Proc Soc
DE Cramer-Rao lower bound; OFDM; cyclic prefix; time delay estimation;
blind; TDOA
AB One main drawback of using Time Difference of Arrival (TDOA) methods for source localization and navigation is that they require centralization of multiple copies of a signal. This paper considers blindly estimating the location of a Cyclic Prefix (CP) in an Orthogonal Frequency Division Multiplexing (OFDM) signal, enabling distributed TDOA computation up to an integer ambiguity. This ambiguity can be resolved using integer least-squares methods, if enough TDOAs are available. The contributions of this paper are derivation of the Cramer-Rao Lower Bound (CRLB) on locating the CP, and hence on the underlying source localization problem.
C1 [Martin, Richard K.] USAF, Inst Technol, Dept Elec & Comp Eng, Wright Patterson AFB, OH 45433 USA.
[Yan, Chunpeng; Fan, H. Howard] Univ Cincinnati, Dept Elect & Comp Engn, Cincinnati, OH 45221 USA.
RP Martin, RK (reprint author), USAF, Inst Technol, Dept Elec & Comp Eng, Wright Patterson AFB, OH 45433 USA.
EM richard.martin@afit.edu; yancg@ececs.uc.edu; h.fan@uc.edu
FU Air Force Research Labs
FX Funded in part by the Air Force Research Labs. 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 U.S. Government. This document has been approved for
public release; distribution unlimited.
NR 10
TC 5
Z9 5
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4244-2353-8
J9 INT CONF ACOUST SPEE
PY 2009
BP 2289
EP +
DI 10.1109/ICASSP.2009.4960077
PG 2
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA BKQ01
UT WOS:000268919201112
ER
PT B
AU Hartley, TDR
Fasih, AR
Berdanier, CA
Ozguner, F
Catalyurek, UV
AF Hartley, Timothy D. R.
Fasih, Ahmed R.
Berdanier, Charles A.
Oezguener, Fuesun
Catalyurek, Umit V.
GP IEEE
TI Investigating the Use of GPU-Accelerated Nodes for SAR Image Formation
SO 2009 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING AND WORKSHOPS
LA English
DT Proceedings Paper
CT IEEE International Conference on Cluster Computing (Cluster 2009)
CY AUG 31-SEP 04, 2009
CL New Orleans, LA
SP IEEE Comp Soc, IEEE Comp Soc TCSC
AB The computation of an electromagnetic reflectivity image from a set of radar returns is a computationally intensive process. Therefore, the use of high performance computing is required to form images from radar signals in a short time frame. This paper explores the use of distributed memory cluster computers and accelerator technologies such as GPUs for radar signal analysis applications, particularly back-projection image formation. We obtain good results with the use of GPUs and compare their performance in terms of execution time with distributed memory cluster computers. When using a configuration with 4 GPU-accelerated nodes, we achieve speedups up to 3.45x for different input and output data size combinations.
C1 [Hartley, Timothy D. R.; Catalyurek, Umit V.] Ohio State Univ, Dept Biomed Informat, Columbus, OH 43210 USA.
[Hartley, Timothy D. R.; Fasih, Ahmed R.; Oezguener, Fuesun; Catalyurek, Umit V.] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
[Berdanier, Charles A.] Wright Patterson A F Base, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hartley, TDR (reprint author), Ohio State Univ, Dept Biomed Informat, Columbus, OH 43210 USA.
EM hartleyt@bmi.osu.edu; fasiha@ece.osu.edu; charles.berdanier@wpafb.af.ml;
ozguner@ece.osu.edu; unit@bmi.osu.edu
FU U.S. Department of Energy SciDAC [DE-FC02-06ER2775]; U.S. National
Science Foundation [CNS-0643969, CNS-0403342]; Ohio Super computing
Center [PAS0052]; AFRL/DAGSI Ohio Student-Faculty Research Fellowship
[RY6-OSU-08-3]
FX This work was supported in part by the U.S. Department of Energy SciDAC
Grant DE-FC02-06ER2775; by the U.S. National Science Foundation under
Grants CNS-0643969, and CNS-0403342; by Ohio Super computing Center
Grant PAS0052; by AFRL/DAGSI Ohio Student-Faculty Research Fellowship
RY6-OSU-08-3.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5011-4
PY 2009
BP 663
EP +
PG 2
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BNN01
UT WOS:000275023800083
ER
PT S
AU Kelly, D
Raines, R
Baldwin, R
Mullins, B
Grimaila, M
AF Kelly, Douglas
Raines, Richard
Baldwin, Rusty
Mullins, Barry
Grimaila, Michael
GP IEEE
TI Towards a Taxonomy of Wired and Wireless Anonymous Networks
SO 2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-8
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC 2009)
CY JUN 14-18, 2009
CL Dresden, GERMANY
SP IEEE
DE Anonymity; privacy; taxonomy; communications networks
ID PROTOCOL
AB With the aim to preserve privacy over a communications network, a plethora of anonymous protocols have been proposed along with many empirical investigations into specific adversary attacks over those networks. However, no known taxonomies exist that address anonymity in the diverse set of both wired and wireless anonymous communications networks. This paper proposes such a novel cubic taxonomy which explores the three key components of anonymity property, adversary capability, and network type. This taxonomy expands the definition of anonymity and aids in the advancement of state-of-the-art technological privacy-preserving mechanisms in anonymous networks against any adversary.
C1 [Kelly, Douglas; Raines, Richard; Baldwin, Rusty; Mullins, Barry; Grimaila, Michael] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Kelly, D (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM Douglas.Kelly@afit.edu; Richard.Raines@afit.edu; Rusty.Baldwin@afit.edu;
Barry.Mullins@afit.edu; Michael.Grimaila@afit.edu
NR 65
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4244-3434-3
J9 IEEE ICC
PY 2009
BP 585
EP 592
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQG15
UT WOS:000280922200110
ER
PT S
AU Klein, RW
Temple, MA
Mendenhall, MJ
Reising, DR
AF Klein, R. W.
Temple, M. A.
Mendenhall, M. J.
Reising, D. R.
GP IEEE
TI Sensitivity Analysis of Burst Detection and RF Fingerprinting
Classification Performance
SO 2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-8
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC 2009)
CY JUN 14-18, 2009
CL Dresden, GERMANY
SP IEEE
ID TURN-ON TRANSIENTS
AB There has been a recent shift toward improving wireless access security within the OSI PHY layer by exploiting RF features that are inherently device specific and difficult to replicate by an unintended party. This work addresses the extraction and exploitation of RF "fingerprints" to classify emissions and provide device-specific identification. Burst transient detection precedes RF fingerprint extraction and is generally the most critical step in the overall process. This work provides a much needed sensitivity analysis of burst detection capability. The analysis is conducted using instantaneous amplitude responses with both Fractal-Bayesian Step Change Detection (Fractal-BSCD) and Variance Trajectory (VT) processes. The performance of each method is evaluated under varying SNR conditions using experimentally collected 802.11a OFDM signals. The impact of transient detection error on signal classification performance is then demonstrated using RF fingerprints and Multiple Discriminant Analysis (MDA) with Maximum Likelihood (ML) classification. The VT technique emerges as the better alternative for all SNRs considered and yields MDA-ML classification accuracy that is consistent with "perfect" transient estimation performance.
C1 [Klein, R. W.; Temple, M. A.; Mendenhall, M. J.; Reising, D. R.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Klein, RW (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM michael.temple@afit.edu
NR 18
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4244-3434-3
J9 IEEE ICC
PY 2009
BP 641
EP 645
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQG15
UT WOS:000280922200120
ER
PT S
AU Like, EC
Temple, MA
Gustafson, SC
AF Like, E. C.
Temple, M. A.
Gustafson, S. C.
GP IEEE
TI Adaptive Intra-Symbol SMSE Waveform Design Amidst Coexistent Primary
Users
SO 2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-8
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC 2009)
CY JUN 14-18, 2009
CL Dresden, GERMANY
SP IEEE
AB An analytic approach is presented for optimizing Spectrally Modulated, Spectrally Encoded (SMSE) waveforms using independent selection of intra-symbol (within a symbol) subcarrier power and modulation order. The SMSE framework is well-suited for cognition-based, software defined radio (SDR) applications. By exploiting statistical knowledge about the spectral and temporal behavior of interfering signals, the inherent SMSE framework flexibility is leveraged to substantially increase system throughput while limiting coexistent interference. Results for a coexistent scenario are provided in which the analytic optimization of the SMSE waveform is demonstrated in the presence of multiple Direct Sequence Spread Spectrum (DSSS) signals. The results reveal significant performance benefits that demonstrate the potential of the SMSE framework to dynamically adapt to changing environmental conditions-key functionality required for future SDR implementations.
C1 [Like, E. C.; Temple, M. A.; Gustafson, S. C.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Like, EC (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM michael.temple@afit.edu
NR 19
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4244-3434-3
J9 IEEE ICC
PY 2009
BP 4458
EP 4463
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQG15
UT WOS:000280922202074
ER
PT S
AU Allen, JN
Abdel-Aty-Zohdy, HS
Ewing, RL
AF Allen, Jacob N.
Abdel-Aty-Zohdy, Hoda S.
Ewing, Robert L.
GP IEEE
TI Agile Hardware Development with Rapid Hardware Definition Language
SO 2009 IEEE INTERNATIONAL CONFERENCE ON ELECTRO/INFORMATION TECHNOLOGY
SE International Conference on Electro Information Technology
LA English
DT Proceedings Paper
CT IEEE International Conference on Electro/Information Technology
CY JUN 07-09, 2009
CL Windsor, CANADA
SP IEEE
AB Rapid HDL is a hardware definition language developed in C# for the Microsoft Net platform. Rapid HDL unifies digital FPGA hardware development and co-software integration. Hardware is scripted using reusable software objects, communication between hardware and software is automatic, and synthesis is automated using a free tool chain. Rapid HDL represents 18,000 lines of code and is freely available under the MIT license.
C1 [Allen, Jacob N.; Abdel-Aty-Zohdy, Hoda S.] Oakland Univ, Dept Elect & Comp Engn, Microelect Syst Design Lab, Rochester Hills, MI 48309 USA.
[Ewing, Robert L.] Wright Patterson Air Force Base, Air Force Res Lab, Dayton, OH 45431 USA.
RP Allen, JN (reprint author), Oakland Univ, Dept Elect & Comp Engn, Microelect Syst Design Lab, Rochester Hills, MI 48309 USA.
FU [FA8650-04-2-4201]; [RSC04025]
FX This work is partially supported by a research grant #FA8650-04-2-4201,
No. RSC04025, Task 1 from the AFRL (2007- 2009). Views and conclusions
herein are those of the authors, and not necessarily the views of the US
Air Force or the US government.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2154-0357
BN 978-1-4244-3354-4
J9 INT CONF ELECTRO INF
PY 2009
BP 381
EP +
PG 3
WC Computer Science, Interdisciplinary Applications; Engineering,
Electrical & Electronic
SC Computer Science; Engineering
GA BNE68
UT WOS:000274280700074
ER
PT B
AU Lidowski, RL
Mullins, BE
Baldwin, RO
AF Lidowski, Robert L.
Mullins, Barry E.
Baldwin, Rusty O.
GP IEEE
TI A Novel Communications Protocol Using Geographic Routing for Swarming
UAVs Performing a Search Mission
SO 2009 IEEE INTERNATIONAL CONFERENCE ON PERVASIVE COMPUTING AND
COMMUNICATIONS (PERCOM), VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 7th IEEE International Conference on Pervasive Computing and
Communications
CY MAR 09-13, 2009
CL Galveston, TX
SP IEEE
DE geographic' routing'; unmanned' aerial' vehicles'; communications'
AB This paper develops a novel communications protocol for autonomous swarms of unmanned aerial vehicles (UAVs) searching a 2-dimensional grid. The search protocol, the UAV Search Mission Protocol (USMP), combines inter-UAV communication with geographic routing to improve search efficiency in terms of total searches, distance traveled by UAVs, and the minimization of UAV direction changes. By determining where search state updates impact search decisions, messages are geographically routed to improve search efficiency. USMP and the geographic greedy perimeter stateless routing (GPSR) protocol are studied via simulation using OPNET Modeler 12.0. Geographic routing degrades performance by at least 20% in total searches and distance traveled, but improves direction changes by 6.7%. Overall, USMP improves performance by as much as 188% compared to scenarios without inter-UAV communication.
C1 [Lidowski, Robert L.; Mullins, Barry E.; Baldwin, Rusty O.] USAF, Inst Technol, Dept Elect & Comp Engn, Dayton, OH USA.
RP Lidowski, RL (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Dayton, OH USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3303-2
PY 2009
BP 162
EP 168
PG 7
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BKO10
UT WOS:000268744400019
ER
PT S
AU Hardman, N
Colombi, J
Jacques, D
Hill, R
Miller, J
AF Hardman, Nicholas
Colombi, John
Jacques, David
Hill, Raymond
Miller, Janet
GP IEEE
TI Application of a Seeded Hybrid Genetic Algorithm for User Interface
Design
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC
2009), VOLS 1-9
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man and Cybernetics
CY OCT 11-14, 2009
CL San Antonio, TX
SP IEEE
DE User interface design; human performance modeling; genetic algorithm;
pattern search; human-computer interaction; human-machine interface
AB Studies have established that computer user interface (UI) design is a primary contributor to people's experiences with modern technology; however, current UI development remains more art than quantifiable science. In this paper, we study the use of search algorithms to predict optimal display layouts early in system design. This has the potential to greatly reduce the cost and improve the quality of UI development. Specifically, we demonstrate a hybrid genetic algorithm and pattern search optimization process that makes use of human performance modeling to quantify known design principles. We show how this approach can be tailored by capturing contextual factors in order to properly seed and tune the genetic algorithm. Finally, we demonstrate the ability of this process to discover superior layouts as compared to manual qualitative methods.
C1 [Hardman, Nicholas; Colombi, John; Jacques, David; Hill, Raymond] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Miller, Janet] Human Performance Wing 711th, Wright Patterson AFB, OH 45433 USA.
RP Hardman, N (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM nicholas.hardman@afit.edu
FU 711th Human Performance Wing; Human Effectiveness Division
FX This work was supported in part by the 711th Human Performance Wing,
Human Effectiveness Division.
NR 15
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4244-2793-2
J9 IEEE SYS MAN CYBERN
PY 2009
BP 462
EP +
DI 10.1109/ICSMC.2009.5346789
PG 2
WC Computer Science, Cybernetics; Computer Science, Information Systems
SC Computer Science
GA BPP02
UT WOS:000279574600079
ER
PT S
AU Repperger, DW
Warm, JS
Vidulich, MA
Finomore, VS
AF Repperger, D. W.
Warm, J. S.
Vidulich, M. A.
Finomore, V. S.
GP IEEE
TI Positive and Negative Predictive Power as an Aid in Robust/Dynamic
Decision Making
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC
2009), VOLS 1-9
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man and Cybernetics
CY OCT 11-14, 2009
CL San Antonio, TX
SP IEEE
DE signal detection theory; dynamic decision making
AB The diagnostic capability of using positive and negative predictive power in dynamic and robust decision making paradigms is explored. Several mathematical formulations are discussed to employ this concept to assist in decision making when human-machine systems may have characteristics that change with time.
C1 [Repperger, D. W.; Warm, J. S.; Vidulich, M. A.; Finomore, V. S.] WPAFB, AFRL, Dayton, OH USA.
RP Repperger, DW (reprint author), WPAFB, AFRL, 711 HPW, Dayton, OH USA.
EM d.repperger@ieee.org; Joel.Warm@wpafb.af.mil;
Michael.Vidulich@wpafb.af.mil; Victor.Finomore@wpafb.af.mil
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4244-2793-2
J9 IEEE SYS MAN CYBERN
PY 2009
BP 2080
EP 2084
DI 10.1109/ICSMC.2009.5346311
PG 5
WC Computer Science, Cybernetics; Computer Science, Information Systems
SC Computer Science
GA BPP02
UT WOS:000279574601054
ER
PT S
AU Roberts, RG
Repperger, DW
AF Roberts, Rodney G.
Repperger, Daniel W.
GP IEEE
TI On the Absolute Orientation Problem in Computer Vision
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC
2009), VOLS 1-9
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man and Cybernetics
CY OCT 11-14, 2009
CL San Antonio, TX
SP IEEE
DE Absolute orientation; least squares; polar decomposition
ID CLOSED-FORM SOLUTION
AB An important problem in computer vision is to determine the orientation of a rigid body in an image. This can be accomplished by matching points or line segments that naturally appear on the object. Several elegant and computationally fast algorithms based on the singular value decomposition and quaternions have been introduced to solve this problem. In this article, the authors first examine the important special case of identifying the attitude of 2D objects and introduce a particularly elegant solution based on the mathematical structure of the complex plane. Motivated by this simple solution to the 2D case, a new derivation of the 3D case based on the polar decomposition is presented. This derivation is in many ways more natural than previous derivations, particularly when the model and data contain no noise.
C1 [Roberts, Rodney G.] Florida State Univ, Dept Elect & Comp Eng, Tallahassee, FL 32306 USA.
[Repperger, Daniel W.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Roberts, RG (reprint author), Florida State Univ, Dept Elect & Comp Eng, Tallahassee, FL 32306 USA.
EM rroberts@eng.fsu.edu; Daniel.Repperger@wpafb.af.mil
FU Air Force Research Lab
FX The authors gratefully acknowledge the support of the Air Force Research
Lab.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4244-2793-2
J9 IEEE SYS MAN CYBERN
PY 2009
BP 4142
EP +
DI 10.1109/ICSMC.2009.5346717
PG 2
WC Computer Science, Cybernetics; Computer Science, Information Systems
SC Computer Science
GA BPP02
UT WOS:000279574602109
ER
PT S
AU Sundberg, R
Richtsmeier, S
Haren, R
AF Sundberg, Robert
Richtsmeier, Steven
Haren, Raymond
GP IEEE
TI IMPROVED FULL SPECTRUM CLOUDY SCENE SIMULATION
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Hyperspectral; Multispectral; Simulation; Scene; Algorithm; Sensor;
Visible; Infrared
ID MULTIPLE-SCATTERING
AB This paper will discuss recent improvements made to the MCScene code, a high fidelity model for full optical spectrum (UV through LWIR) hyperspectral image (HSI) simulation MCScene provides an accurate, robust, and efficient means to generate HSI scenes for algorithm validation MCScene utilizes a Direct Simulation Monte Carlo approach for modeling 3D atmospheric radiative transfer (RT) including full treatment of molecular absorption and Rayleigh scattering, aerosol absorption and scattering, and multiple scattering and adjacency effects, as well as scattering from spatially inhomogeneous surfaces, including surface BRDF effects The model includes treatment of land and ocean surfaces, 3D terrain, 3D surface objects, and effects of finite clouds with surface shadowing. This paper will provide an overview of how RI elements are incorporated into the Monte Carlo engine Several new examples of the capabilities of MCScene to simulate 3-dimensional cloud fields will also be discussed, and sample calculations will be presented.
C1 [Sundberg, Robert; Richtsmeier, Steven] Spectral Sci Inc, 4 4th Ave, Burlington, MA 01803 USA.
[Haren, Raymond] RYJT, AFRL, Wright Patterson AFB, OH 45433 USA.
RP Sundberg, R (reprint author), Spectral Sci Inc, 4 4th Ave, Burlington, MA 01803 USA.
FU internal research and development; Air Force Research Laboratory,
Sensors Directorate [F33615-02-C-1167]
FX The authors wish to acknowledge Spectral Sciences, Inc. for support
under an internal research and development grant and the Air Force
Research Laboratory, Sensors Directorate for support under contract
number F33615-02-C-1167.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 148
EP +
DI 10.1109/IGARSS.2009.5416907
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054100038
ER
PT S
AU Berk, A
Acharya, P
Anderson, G
Gossage, B
AF Berk, Alexander
Acharya, Prabhat
Anderson, Gail
Gossage, Brett
GP IEEE
TI RECENT DEVELOPMENTS IN THE MODTRAN (R) ATMOSPHERIC MODEL AND
IMPLICATIONS FOR HYPERSPECTRAL COMPENSATION
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Hyperspectral Imaging; Remote Sensing; Atmospheric Correction; Radiative
Transfer; MODTRAN (R)
AB Recent developmental efforts involving in the MODTRAN (R) atmospheric radiative transport model and derivative codes have led to advancements with important implications for hyperspectral imaging New MODTRAN (R) features include (a) direct computation of diffuse transmittance and spherical albedo data, (b) two options for computing multiple line-of-sight (MLOS) radiances using a single DISORT scattering calculation for each spectral wavelength or channel and (c) enhancements to the treatment of Earth's curvature effects on scattered radiances
C1 [Berk, Alexander; Acharya, Prabhat] Spectral Sci Inc, 4 4th Ave, Burlington, MA 01803 USA.
[Anderson, Gail] Air Force Res Lab, Space Vehicle Directorate, Hanscom AFB, MA 01731 USA.
[Gossage, Brett] Invariant Corp, Huntsville, AL 35802 USA.
RP Berk, A (reprint author), Spectral Sci Inc, 4 4th Ave, Burlington, MA 01803 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 513
EP +
DI 10.1109/IGARSS.2009.5418058
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054100130
ER
PT S
AU Felde, GW
Anderson, GP
Cooley, TW
McMullen, RW
AF Felde, Gerald W.
Anderson, Gail P.
Cooley, Thomas W.
McMullen, Robert W.
GP IEEE
TI ATMOSPHERIC COMPENSATION FOR IMAGING SPECTROMETER SYSTEMS WITH CHANGING
IMAGING GEOMETRY
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Atmospheric compensation; imaging spectrometer; hyperspectral imagery;
FLAASH
AB Spectral radiance measurements in the solar reflective regime, which are obtained from downward looking space-based or airborne imaging spectrometer systems must be compensated for the influence of the atmosphere in order to retrieve earth surface reflectance spectra The Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes (FLAASH) atmospheric correction code was updated with a new option to handle measurements from a new pushbroom sensor system having a continuously varying viewing geometry over an Image scene. However, the new technique employed in FLAASH to handle this atmospheric compensation scenario does not explicitly account for the different viewing geometry values for each line in an image scene, which causes some error in the FLAASH retrievals Simulated radiance cubes are used to gain a quantitative understanding of FLAASH retrieval errors due to viewing geometry errors
C1 [Felde, Gerald W.; Anderson, Gail P.] USAF, Res Lab, Space Vehicles Directorate, Hanscom Afb, MA 01731 USA.
[Cooley, Thomas W.] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[McMullen, Robert W.] Boston Coll, Chestnut Hill, MA 02467 USA.
RP Felde, GW (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom Afb, MA 01731 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 521
EP +
DI 10.1109/IGARSS.2009.5418060
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054100132
ER
PT B
AU Alexander, DR
Philpy, S
Pierce, D
AF Alexander, David R.
Philpy, Stephen
Pierce, Donald
GP IEEE
TI Qualification & Reliability Monitoring for Small Quantity ASIC
Populations
SO 2009 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 47th Annual IEEE International Reliability Physics Symposium
CY APR 26-30, 2009
CL Montreal, CANADA
SP IEEE
DE ASICs; lifetime; qualification; reliability
AB The authors present a discussion of the issues and an approach for qualification and reliability monitoring for small quantity ASICs used in long lifetime applications. Special attention is given to issues associated with sub-100 nm technologies and the unique challenges posed by new materials and processes.
C1 [Alexander, David R.] USAF, Res Lab, Albuquerque, NM USA.
[Philpy, Stephen] Microelect Res & Dev Corp, Colorado Springs, CO USA.
[Pierce, Donald] Sandia Technologies Inc, Albuquerque, NM USA.
RP Alexander, DR (reprint author), USAF, Res Lab, Albuquerque, NM USA.
EM dralexa@comcast.net
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2888-5
PY 2009
BP 244
EP +
DI 10.1109/IRPS.2009.5173257
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical &
Electronic; Physics, Multidisciplinary
SC Computer Science; Engineering; Physics
GA BMF10
UT WOS:000272068100039
ER
PT B
AU Altshuler, EE
Best, SR
O'Donnell, TH
Herscovici, N
AF Altshuler, Edward E.
Best, Steven R.
O'Donnell, Terry H.
Herscovici, Naftali
GP IEEE
TI An Electrically-Small Multi-Frequency Genetic Antenna Immersed in a
Dielectric Powder
SO 2009 IEEE INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY: SMALL ANTENNAS
AND NOVEL METAMATERIALS (IWAT)
LA English
DT Proceedings Paper
CT IEEE International Workshop on Antenna Technology
CY MAR 02-04, 2009
CL Santa Monica, CA
SP IEEE
C1 [Altshuler, Edward E.; O'Donnell, Terry H.; Herscovici, Naftali] USAF, Res Lab, Div Electromagnet Technol, Hanscom AFB, MA 01731 USA.
RP Altshuler, EE (reprint author), USAF, Res Lab, Div Electromagnet Technol, Hanscom AFB, MA 01731 USA.
EM edward.altshuler@hanscom.af.mil; sbest@mitre.org;
teresa.odonnell.ctr@hanscom.af.mil; naftali.herscovici@hanscom.af.mil
FU Air Force Office of Scientific Research
FX The authors would like to thank Drs. Arthur Yaghjian, Steven Best, and
Tuli Herscovici for helpful discussions. This research was sponsored by
the Air Force Office of Scientific Research.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4395-6
PY 2009
BP 445
EP 447
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BKC48
UT WOS:000267753800113
ER
PT S
AU Li, AG
Burggraf, LW
Phillips, DM
AF Li, Alex G.
Burggraf, Larry W.
Phillips, David M.
GP IEEE
TI Nanometer-Scale Elastic Modulus of Surfaces and Thin Films determined
using an Atomic Force Microscope
SO 2009 IEEE NANOTECHNOLOGY MATERIALS AND DEVICES CONFERENCE
SE IEEE Nanotechnology Materials and Devices Conference
LA English
DT Proceedings Paper
CT IEEE Nanotechnology Materials and Devices Conference
CY JUN 02-05, 2009
CL Traverse City, MI
SP IEEE
DE Atomic Force Microscopy; Nanomechanics; Surface; Acoustics
ID ACOUSTIC MICROSCOPY; AFM
AB A versatile acoustic method using a commercial atomic force microscope (AFM) was developed to measure surface stiffness at nanometerscales. Calibrated measurements of acoustic reflections at interfaces between the AFM tip and the surfaces of reference and test materials yielded near-surface interfacial stiffness, from which the elastic modulus was determined using a simple contact mechanics model. The utility and versatility of this method were demonstrated by determining elastic modulus relaxation for surfaces and thin films, including a freshly exposed, reconstructing epoxy surface, and by probing depth-dependent elastic modulus for thin polystyrene films on oxidized silicon substrates.
C1 [Li, Alex G.; Burggraf, Larry W.] AF Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Phillips, David M.] AF Res Lab, Materials & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, AG (reprint author), AF Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM alex.li@afit.edu
FU AFMC NSS/CXDC; United States Air Force; Department of Defense; U.S.
Government
FX This research was partially sponsored by AFMC NSS/CXDC. The views
expressed in this report are those of the authors and do not reflect
official position of the United States Air Force, Department of Defense,
or the U.S. Government.
NR 15
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2378-377X
BN 978-1-4244-4695-7
J9 IEEE NANOTECHNOL MAT
PY 2009
BP 104
EP +
DI 10.1109/NMDC.2009.5167570
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BMU53
UT WOS:000273600300027
ER
PT S
AU Boyce, NO
Kowash, BR
Wehe, DK
AF Boyce, Nathan O.
Kowash, Benjamin R.
Wehe, David K.
BE Yu, B
TI Thermal Neutron Imaging with a Rotationally Modulated Collimator (RMC)
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
AB The Rotating Modulation Collimator has been modified to image thermal neutron sources. The components of the RMC imaging system were modified to suit thermal neutrons. The experiment compared two detectors (He3 and BF3) and two mask materials (cadmium and borated epoxy) for a 77mCi PuBe source. Preliminary results indicate that both He3 and BF3 detectors may be used with the RMC. Further efforts will be made to reduce the uncertainty in the system.
C1 [Boyce, Nathan O.; Kowash, Benjamin R.] USAF, Inst Technol, Dayton, OH 45433 USA.
RP Boyce, NO (reprint author), USAF, Inst Technol, Dayton, OH 45433 USA.
EM Nathan.Boyce@afit.edu; Benjamin.Kowash@afit.edu; dkw@umich.edu
NR 6
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1129
EP 1133
DI 10.1109/NSSMIC.2009.5402407
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100244
ER
PT S
AU Williams, C
Slaughter, R
Burggraf, L
Ross, M
Adamson, P
Petrosky, J
AF Williams, Christopher
Slaughter, Robert
Burggraf, Larry
Ross, Mathew
Adamson, Paul
Petrosky, James
BE Yu, B
TI Positron Annihilation Lifetime Spectroscopy of Dodecaborate Cage
Molecules in Aqueous Nitrate Solutions
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
AB A fast-fast PALS spectrometer incorporating two BaF(2) scintillation detectors was characterized. The PALS spectrometer was employed to measure a model explosives system having nitrate oxidizing sites and B(12)H(12)(-2) reducing sites. Positron annihilation lifetimes and intensities were measured for nitrogen-purged aqueous solutions containing various concentrations of potassium dodecahydrododecaborate K(2)B(12)H(12) and potassium nitrate with added carrier-free (22)NaCl. Data analysis was accomplished using the PALSfit software program. The influence of electron scavenging and competition by nitrate ions was measured for various concentrations of potassium nitrate. Suppression of positronium formation by nitrate ions at 5 M concentration was greater for o-Ps than for p-Ps in 0.42 M dodecahydrododecaborate solution. At concentrations above 10(-2) M dodecahydrododecaborate only solutions the B(12)H(12)(-2) anion suppressed p-Ps formation.
C1 [Williams, Christopher; Slaughter, Robert; Ross, Mathew; Adamson, Paul; Petrosky, James] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Williams, C (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM cwilliam@afit.edu; robert.slaughter@afit.edu; larry.burggraf@afit.edu;
mathew.ross@army.mil; paul.adamson@kirtland.af.mil;
james.petrosky@afit.edu
NR 12
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1579
EP 1584
DI 10.1109/NSSMIC.2009.5402266
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100344
ER
PT B
AU Parker, JV
Roth, CE
Coffey, SK
Lehr, FM
Degnan, JH
AF Parker, J. V.
Roth, C. E.
Coffey, S. K.
Lehr, F. M.
Degnan, J. H.
GP IEEE
TI PERFORMANCE OF A COMPACT, CASCADE FCG SYSTEM
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB A system of two FCG's coupled via "flux-trapping" is described. The driver FCG, designated SAM, was custom-designed for this application. The output of SAM is a single-turn loop that is tightly coupled to the first winding section of a larger FCG, designated JILL. The single-turn driver loop, coupled to 35 turns of the input winding of JILL, provides a calculated flux gain of 28.
For the first experimental test of the SAM/JILL system, the SAM generator was seeded with 1.0 kA (flux 0.29 Wb) and produced a current of 472 kA (flux 0.10 Wb) in the coupling loop at crowbar time of the JILL generator.
Based on the calculated mutual inductance of 5.95 mu H, the JILL generator began operation with a seed flux of 2.81 Wb. With this seed flux, the expected output current for JILL driving a 0.8 mu H load is 1.8 MA. The measured output current was 884 kA, roughly one half of the expected current. Analysis of the I-dot data from the test shows that this low performance was due to multiple electrical breakdowns in the JILL generator during the interval when the armature-stator contact point was underneath the coupling loop.
Subsequent analysis suggests that the electrical breakdowns were the result of flux compression in the coupling loop. Details of the experiment and analysis will be presented. A modification to the SAM/JILL apparatus is proposed to eliminate electrical breakdown.
C1 [Parker, J. V.; Roth, C. E.] Sci Applicat Int Corp, 2109 Air Pk Rd SE, Albuquerque, NM 87106 USA.
[Coffey, S. K.] NumerEx LLC, Albuquerque, NM 87106 USA.
[Lehr, F. M.; Degnan, J. H.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Parker, JV (reprint author), Sci Applicat Int Corp, 2109 Air Pk Rd SE, Albuquerque, NM 87106 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 175
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800033
ER
PT B
AU Ruden, EL
Brown, DJ
Kostora, MR
Grabowski, TC
Gregg, CW
Martinez, BM
Parker, JV
Camacho, JF
Coffey, SK
Poulsen, P
AF Ruden, E. L.
Brown, D. J.
Kostora, M. R.
Grabowski, T. C.
Gregg, C. W.
Martinez, B. M.
Parker, J. V.
Camacho, J. F.
Coffey, S. K.
Poulsen, P.
GP IEEE
TI DAMPING RESONANT CURRENT IN A SPARK-GAP TRIGGER CIRCUIT TO REDUCE NOISE
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB Radio frequency (RF) interference (noise) caused by the triggering of spark-gap switched pulsed-power circuits is a significant problem for electronic diagnostics. Traditional approaches to mitigation involve using RF-tight enclosures, noise resistant diagnostic designs, power filtering, and/or time-integration of signals. These approaches can be costly, and not always successful. A detailed study of the source of this noise is undertaken motivated by an experiment using a charged coaxial cable triggered rail-gap (multichannel linear spark-gap) switched system based on a quarter-module of AFRL's Shiva Star Capacitor Bank. For this, the noise interferes with an unintegrated measurement needed of the load's local electric field. The noise source is identified as resonant current oscillation after rail-gap closure in the circuit triggering the rail-gaps. The solution in this case is to replace the 50 Omega trigger cable with one with half that impedance, and install a carbon composite resistor in series with the cable output with a resistance equal to the new cable's impedance. The output impedance of the trigger circuit and, therefore, the rail-gap current behavior during breakdown is thereby preserved, but reflections back into the cable after switch closure are minimized by impedance matched resistance termination. In practice, termination is compromised by lead inductance and blocking capacitors, but near-critical damping of subsequent resonant behavior is nonetheless observed. A circuit model of this behavior is validated to help adapt and optimize the technique for other systems.
C1 [Ruden, E. L.] USAF, Res Lab, Directed Energy Directorate, AFRL RDHP, 3550 Aberdeen Blvd SE, Kirtland AFB, NM 87117 USA.
[Brown, D. J.; Kostora, M. R.; Grabowski, T. C.; Gregg, C. W.; Martinez, B. M.; Parker, J. V.] Sci Applicat Int Corp, Albuquerque, NM 87106 USA.
[Camacho, J. F.; Coffey, S. K.] NumerEx, Albuquerque, NM 87106 USA.
[Poulsen, P.] CAREN Co Livermore, Livermore, CA 94551 USA.
RP Ruden, EL (reprint author), USAF, Res Lab, Directed Energy Directorate, AFRL RDHP, 3550 Aberdeen Blvd SE, Kirtland AFB, NM 87117 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 1189
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800236
ER
PT S
AU Fuhrmann, DR
Browning, JP
Rangaswamy, M
AF Fuhrmann, Daniel R.
Browning, J. Paul
Rangaswamy, Muralidhar
GP IEEE
TI AMBIGUITY FUNCTION ANALYSIS FOR THE HYBRID MIMO PHASED-ARRAY RADAR
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB The Hybrid MIMO Phased Array Radar, or HMPAR, is a notional concept for a multisensor radar architecture that combines elements of traditional phased-array radar with the emerging technology of Multiple-Input Multiple Output (MIMO) radar. A HMPAR comprises a large number, MP, of T/R elements, organized into M subarrays of P elements each. Within each subarray, passive element-level phase shifting is used to steer transmit and receive beams in some desired fashion. Each of the M subarrays are in turn driven by independently amplified phase-coded signals. This paper derives a version of the radar ambiguity function that is appropriate for this radar architecture. The ambiguity function is a function of time delay, Doppler frequency shift, and two or more spatial variables. An illustrative example for a particular MIMO signal set is given.
C1 [Fuhrmann, Daniel R.] Michigan Technol Univ, Dept Elect & Comp Engn, Houghton, MI 49931 USA.
[Browning, J. Paul; Rangaswamy, Muralidhar] US Air Force, Res Lab, Sensors Directorate, Royal Signals Proc Branch, Wright Patterson AFB, OH 45433 USA.
RP Fuhrmann, DR (reprint author), Michigan Technol Univ, Dept Elect & Comp Engn, Houghton, MI 49931 USA.
FU U.S. Air Force Office of Scientific Research under the ASEE Summer
Faculty Fellowship Program
FX This work was supported in part by the U.S. Air Force Office of
Scientific Research under the auspices of the 2008 ASEE Summer Faculty
Fellowship Program
NR 8
TC 0
Z9 0
U1 2
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 26
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800006
ER
PT S
AU Fuller, DF
Saville, MA
AF Fuller, Dane F.
Saville, Michael A.
GP IEEE
TI Rapid Extraction of Doubly-Curved Scattering Centers for Automobile
Detection in the Presence of Clutter
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID CLEAN TECHNIQUE
AB This paper presents an algorithm for low-order automobile detection based on doubly-curved surface scattering phenomenon. As reported in recent works, detection based on doubly-curved scattering features is possible because automobiles consist of scattering centers that are characteristic of canonical shapes. Using a basis consisting of frequency dependent functions from well-known shapes, the proposed algorithm exploits frequency invariance of doubly-curved scattering centers to locate possible automobile scatterers in wideband radar data. The algorithm compares the magnitudes of two coarse images constructed from a single set of wideband data. Details of the basis, size of the partitions, and a demonstration with measured radar data are presented. While more work remains, the results begin to establish a performance baseline for rapidly detecting automobiles in time-sensitive applications.
C1 [Fuller, Dane F.; Saville, Michael A.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Fuller, DF (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM dane.fuller@afit.edu; Michael.saville@afit.edu
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 72
EP 77
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800014
ER
PT S
AU Wang, P
Li, HB
Himed, B
AF Wang, Pu
Li, Hongbin
Himed, Braham
GP IEEE
TI A Simplified Parametric GLRT for STAP Detection
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID ADAPTIVE SIGNAL-DETECTION
C1 [Wang, Pu; Li, Hongbin] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
[Himed, Braham] US Air Force, Res Lab, RYRT, Wright Patterson AFB, OH 45433 USA.
RP Wang, P (reprint author), Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
EM pwang4@stevens.edu; hli@stevens.edu; Braham.Himed@wpafb.af.mil
RI Wang, Pu/I-7715-2012
FU Air Force Research Laboratory (AFRL) [FA8750-05-2-0001]
FX This work was supported by the Air Force Research Laboratory (AFRL)
under contract number FA8750-05-2-0001.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 107
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800022
ER
PT S
AU Deming, RW
Parker, JT
AF Deming, Ross W.
Parker, Jason T.
GP IEEE
TI An Iterative Inverse-Scattering Approach to Distributed Sensing
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID DIFFRACTION TOMOGRAPHY; ALGORITHM
AB The Kaczmarz method is widely used in computed tomography applications to iteratively solve large inverse problems for which a direct solution is computationally prohibitive, In this paper, the Kaczmarz method is generalized to handle sparse frequency data collected from sparse, spatially distributed, multistatic sensors. In addition, the developed algorithm provides a mathematical solution to the underlying diffraction tomography problem described by the scalar wave equation under the Born approximation. The formulation avoids computing the pseudoinverse of a large forward operator while still converging to the true minimum norm solution to the scattering problem, and the resulting reconstructed images are superior to the matched filter results often employed in SAR/ISAR applications. A fast version of the algorithm that exploits circular symmetries in the sensor geometry is also described.
C1 [Deming, Ross W.] USAF, Res Lab, Hanscom AFB, Bedford, MA 01731 USA.
[Parker, Jason T.] Wright Patterson AFB, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Deming, RW (reprint author), USAF, Res Lab, Hanscom AFB, Bedford, MA 01731 USA.
EM ross.deming@hanscom.af.mil; jason.parker@wpafb.af.mil
FU AFOSR of Arje Nachman
FX This work was supported in part by an AFOSR laboratory task under the
direction of Arje Nachman. Thanks are also due to Mr. Justin Bracken,
who provided the WIPL-D simulation results included herein. We would
also like to thank Professor Lee Potter and the anonymous reviewers for
providing insightful comments on this manuscript.
NR 10
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 122
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800025
ER
PT S
AU Majumder, U
Soumekh, M
Minardi, M
Scarborough, S
Gorham, L
Casteel, C
Judge, M
Kirk, J
AF Majumder, Uttam
Soumekh, Mehrdad
Minardi, Michael
Scarborough, Steven
Gorham, LeRoy
Casteel, Curtis
Judge, Matthew
Kirk, John
GP IEEE
TI Synthetic Aperture Radar Moving Target Indication Processing of
Along-Track Monopulse Nonlinear Gotcha Data
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID SAR; RECONNAISSANCE
AB This paper is concerned with imaging and moving target detection using a Synthetic Aperture Radar (SAR) platform that is known as Gotcha. The SAR platform can interrogate a scene using an imperfect circular trajectory; we refer to this as nonlinear SAR data collection. This collection can make monostatic and quasi-monostatic measurements in the along-track domain. We present subaperture-based wavefront reconstruction algorithms for motion compensation and imaging from this nonlinear SAR database. We also discuss adaptive filtering algorithms to construct MTI imagery from the two receiver channels of the system. Results will be provided.
C1 [Majumder, Uttam; Soumekh, Mehrdad; Minardi, Michael; Scarborough, Steven; Gorham, LeRoy; Casteel, Curtis; Judge, Matthew] USAF, Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
[Kirk, John] Goleta Star LLC, Torrance, CA 90505 USA.
RP Majumder, U (reprint author), USAF, Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM Uttam.majumder@wpafb.af.mil
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 226
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800047
ER
PT S
AU Wicks, MC
AF Wicks, Michael C.
GP IEEE
TI A Brief History of Waveform Diversity
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID DESIGN; RADAR
AB The U.S. Air Force has set an ambitious goal to be able to anticipate, find, fix, track, target, engage, and assess anything, anytime, anywhere [1]. We will not achieve order of magnitude improvement in detection and tracking performance solely through larger antennas and more power. Instead, advanced signal processing techniques and system concepts will be required. Achieving the sought after demanding goals will instead require a distributed network of heterogeneous sensors.
C1 USAF, Res Lab, Sensors Directorate, Rome, NY 13441 USA.
RP Wicks, MC (reprint author), USAF, Res Lab, Sensors Directorate, Rome, NY 13441 USA.
NR 21
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 328
EP 333
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800068
ER
PT S
AU Linnehan, R
Schindler, J
AF Linnehan, Robert
Schindler, John
GP IEEE
TI Multistatic Scattering from Moving Targets in Multipath Environments
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB We are examining the feasibility of ground target detection and tracking in urban centers using ground moving target indicator (GMTI) radar when line-of-sight (LOS) coverage is intermittent, yet multipath responses from building walls are available. We enhance the standard ray-tracing propagation methods that assume specular wall reflections and point scattering target models. Our two-dimensional analysis includes near field reradiation from the illuminated wall to a target having a multistatic response. We also evaluate the degradation of power and coherency in the signal processing due to wall surface roughness. Results of this work provide insight for the development of processing techniques that may he required for multipath exploitation radar.
C1 [Linnehan, Robert] USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
[Schindler, John] Hanscom AFB, Gen Dynam IT, Bedford, MA 01731 USA.
RP Linnehan, R (reprint author), USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
EM robert.linnehan@us.af.mil
FU Strategic Technology Office
FX The authors would like to thank the Defense Advanced Research Projects
Agency, Strategic Technology Office for their support.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 1066
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800218
ER
PT B
AU Karagozler, ME
Goldstein, SC
Reid, JR
AF Karagozler, Mustafa Emre
Goldstein, Seth Copen
Reid, J. Robert
GP IEEE
TI Stress-driven MEMS Assembly plus Electrostatic Forces=1mm Diameter Robot
SO 2009 IEEE-RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
LA English
DT Proceedings Paper
CT IEEE RSJ International Conference on Intelligent Robots and Systems
CY OCT 10-15, 2009
CL St Louis, MO
SP IEEE Robot & Automat Soc (RA), Robot Soc Japan (RSJ), Soc Instruments & Control Engn, IEEE Ind Elect Soc, Inst Control, Robot & Syst Korea, ABB, Barrett Technol, Inc, Willow Garage, ROBOTIS, Aldebaran Robot
AB As the size of the modules in a self-reconfiguring modular robotic system shrinks and the number of modules increases, the flexibility of the system as a whole increases. In this paper, we describe the manufacturing methods and mechanisms for a 1 millimeter diameter module which can be manufactured en masse. The module is the first step towards realizing the basic unit of claytronics, a modular robotic system designed to scale to millions of units.
C1 [Karagozler, Mustafa Emre] Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
[Goldstein, Seth Copen] Carnegie Mellon Univ, Dept Comp Sci, Pittsburgh, PA 15213 USA.
[Reid, J. Robert] AF Res Lab, Hanscom AFB, MA USA.
RP Karagozler, ME (reprint author), Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
EM mkaragoz@andrew.cmu.edu; James.Reid@hanscom.af.mil
FU NSF [CNS-0428738, ITR-0326054]; AFRL; Intel Corporation
FX This work was supported in part by NSF Grants CNS-0428738, ITR-0326054,
AFRL, and Intel Corporation.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3803-7
PY 2009
BP 2763
EP 2769
DI 10.1109/IROS.2009.5354049
PG 7
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Robotics
SC Computer Science; Engineering; Robotics
GA BSQ11
UT WOS:000285372901141
ER
PT B
AU Hooper, DJ
Peterson, GL
Borghetti, BJ
AF Hooper, Daylond J.
Peterson, Gilbert L.
Borghetti, Brett J.
GP IEEE
TI Dynamic Coalition Formation Under Uncertainty
SO 2009 IEEE-RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
LA English
DT Proceedings Paper
CT IEEE RSJ International Conference on Intelligent Robots and Systems
CY OCT 10-15, 2009
CL St. Louis, MO
SP IEEE Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engn, IEEE Ind Elect Soc, Inst Control, Robot & Syst Korea, ABB, Barrett Technol, Inc, Willow Garage, ROBOTIS, Aldebaran Robot
AB Coalition formation algorithms are generally not applicable to real-world robotic collectives since they lack mechanisms to handle uncertainty. Those mechanisms that do address uncertainty either deflect it by soliciting information from others or apply reinforcement learning to select an agent type from within a set. This paper presents a coalition formation mechanism that directly addresses uncertainty while allowing the agent types to fall outside of a known set. The agent types are captured through a novel agent modeling technique that handles uncertainty through a belief-based evaluation mechanism. This technique allows for uncertainty in environmental data, agent type, coalition value, and agent cost. An investigation of both the effects of adding agents on processing time and of model quality on the convergence rate of initial agent models (and thereby coalition quality) is provided. This approach handles uncertainty on a larger scale than previous work and provides a mechanism readily applied to a dynamic collective of real-world robots.
C1 [Hooper, Daylond J.; Peterson, Gilbert L.; Borghetti, Brett J.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Hooper, DJ (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM daylond.hooper@afit.edu; gilbert.peterson@afit.edu;
brett.borghetti@afit.edu
NR 14
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3803-7
PY 2009
BP 4799
EP 4804
DI 10.1109/IROS.2009.5354319
PG 6
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Robotics
SC Computer Science; Engineering; Robotics
GA BSQ11
UT WOS:000285372902157
ER
PT B
AU Wang, WJ
Chatterjee, M
Kwiat, K
AF Wang, Wenjing
Chatterjee, Mainak
Kwiat, Kevin
GP IEEE
TI Coexistence with Malicious Nodes: A Game Theoretic Approach
SO 2009 INTERNATIONAL CONFERENCE ON GAME THEORY FOR NETWORKS (GAMENETS
2009)
LA English
DT Proceedings Paper
CT International Conference on Game Theory for Networks
CY MAY 13-15, 2009
CL Bogazici Univ, Istanbul, TURKEY
SP IEEE Control Syst Soc (CSS), CREATE NET, ICST, Istanbul Bilgi Univ, Tubitak, CSS
HO Bogazici Univ
AB In this paper, we use game theory to study the interactions between a malicious node and a regular node in wireless networks with unreliable channels. Since the malicious nodes do not reveal their identities to others, it is crucial for the regular nodes to detect them through monitoring and observation. We model the malicious node detection process as a Bayesian game with imperfect information and show that a mixed strategy perfect Bayesian Nash Equilibrium (also a sequential equilibrium) is attainable. While the equilibrium in the detection game ensures the identification of the malicious nodes, we argue that it might not be profitable to isolate the malicious nodes upon detection. As a matter of fact, malicious nodes and regular nodes can co-exist as long as the destruction they bring is less than the contribution they make. To show how we can utilize the malicious nodes, a post-detection game between the malicious and regular nodes is formalized. Solution to this game shows the existence of a subgame perfect Nash Equilibrium and the conditions that achieve the equilibrium. Simulation results and their discussions are also provided to illustrate the properties of the derived equilibria.
C1 [Wang, Wenjing; Chatterjee, Mainak] Univ Cent Florida, Orlando, FL 32816 USA.
[Kwiat, Kevin] Informat Directorate, Air Force Res lab, Griffiss AFB, NY 13441 USA.
RP Wang, WJ (reprint author), Univ Cent Florida, Orlando, FL 32816 USA.
EM wenjing@eecs.ucf.edu; mainak@eecs.ucf.edu; kevin.kwiat@rl.af.mil
FU Air Force Office of Scientific Research (AFOSR) under the federal
[FA9550-07-1-0023]; AT&T Graduate Fellowship in Modeling and Simulation;
[88ABW-2008-1164]; [02DEC08]
FX Emails: {wenjing, mainak}@eecs.ucf.edu, kevin.kwiat@rl.af.mil. This
research was sponsored by the Air Force Office of Scientific Research
(AFOSR) under the federal grant no. FA9550-07-1-0023 and AT&T Graduate
Fellowship in Modeling and Simulation. Approved for Public Release;
distribution unlimited; 88ABW-2008-1164, 02DEC08.
NR 21
TC 6
Z9 6
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4176-1
PY 2009
BP 277
EP +
DI 10.1109/GAMENETS.2009.5137411
PG 2
WC Engineering, Electrical & Electronic; Mathematics, Interdisciplinary
Applications; Telecommunications
SC Engineering; Mathematics; Telecommunications
GA BNH33
UT WOS:000274558900036
ER
PT B
AU Deng, H
Himed, B
AF Deng, Hai
Himed, Braham
GP IEEE
TI Virtual Radar Antenna Beamforming Using Orthogonal Coding Waveforms
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
AB In this paper, an innovative approach to form virtual radar antenna beams is proposed. These virtual beams are shown to be equivalent to those obtained with a traditional phased array of the same size in term of antenna gain and resolution. These beams are formed through digital filtering and using orthogonal coding waveforms. It is shown that using multiple beam forming filters, multiple virtual beams can simultaneously be formed, each having maximum gain and finest resolution.
C1 [Deng, Hai] Univ N Texas, Dept Elect Engn, Denton, TX 76203 USA.
[Himed, Braham] AFRL, RYRT, Sensors Directorate, Dayton, OH 45433 USA.
RP Deng, H (reprint author), Univ N Texas, Dept Elect Engn, Denton, TX 76203 USA.
EM Hai.Deng@unt.edu; Braham.Himed@wpafb.af.mil
NR 4
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 18
EP +
DI 10.1109/WDDC.2009.4800306
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300005
ER
PT B
AU Lo Monte, L
Ansari, R
Erricolo, D
Wicks, MC
AF Lo Monte, Lorenzo
Ansari, Rashid
Erricolo, Danilo
Wicks, Michael C.
GP IEEE
TI The Use of Geometric Diversity for Spectral Dominance in Underground
Imaging
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
ID GEOPHYSICAL DIFFRACTION TOMOGRAPHY; BORN APPROXIMATION; INVERSE
SCATTERING; ALGORITHM; OBJECTS
AB Underground imaging of dielectric and conductive anomalies performed using ground penetrating radars (GPRs) requires expensive wideband systems to increase the resolution. The advent of tomographic principles in multi-monostatic GPRs dramatically improved the imaging capabilities and suggested the possibility of reducing the bandwidth of the probing waveform. In this work we propose to extend the tomographic principles to the case of below-ground distributed sensing, thus taking advantage of the geometric diversity. We show that, by using geometric diversity, the frequency content required to image below-ground targets is drastically reduced to virtually a single monochromatic signal, thus achieving full spectral dominance in the waveform design.
C1 [Lo Monte, Lorenzo; Ansari, Rashid; Erricolo, Danilo] Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA.
[Wicks, Michael C.] Air Force Res Lab, Sensors Directorate, Rome, NY USA.
RP Lo Monte, L (reprint author), Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA.
EM lomonte@ece.uic.edu; Michael.wicks@rl.af.mil
OI Erricolo, Danilo/0000-0001-6352-9567
FU Air Force Research Laboratory
FX The authors are thankful to Mr. W. Baldygo, Air Force Research
Laboratory, for sponsoring and funding this research. We are also
grateful to Mr. J. Parker, Dr. M. Ferrara, Air Force Research
Laboratory, Dr. F. Soldovieri, Consiglio Nazionale Ricerche, Italy,
Prof. M. Cheney, Rensselaer Polytechnic Institute, for their technical
discussions
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 55
EP +
DI 10.1109/WDDC.2009.4800314
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300013
ER
PT B
AU Beard, TW
Temple, MA
Mills, RF
Raquet, JF
AF Beard, T. W.
Temple, M. A.
Mills, R. F.
Raquet, J. F.
GP IEEE
TI A Hybrid GA-RSM Optimization Process for Coexistent SMSE Waveform Design
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
AB A hybrid GA-RSM optimization process is introduced for Spectrally Modulated, Spectrally Encoded (SMSE) waveform design in a coexistent environment containing a Direct Sequence Spread Spectrum (DSSS) system. Expanding upon previous efforts that used independent CA and RSM techniques under perfect DSSS code tracking conditions, a hybrid GA-RSM optimization process is demonstrated here under more realistic conditions with imperfect DSSS code tracking. Two SMSE waveform parameters (number of carriers and carrier bandwidth) are optimized in a coexistent scenario to characterize SMSE impact on Direct Sequence Spread Spectrum (DSSS) bit error rate (P(b)). Hybrid optimization for minimum DSSS P(b) yields SMSE waveform; that were consistent with scenarios having no coexistent SMSE signal present (best-case coexistence). Optimization for maximum DSSS P(b) yields worst-case SMSE-DSSS coexistence with resultant SMSE waveforms being spectrally "matched" to the DSSS signal.
C1 [Beard, T. W.; Temple, M. A.; Mills, R. F.; Raquet, J. F.] USAF, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Beard, TW (reprint author), USAF, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM michael.temple@afit.edu
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 62
EP 66
DI 10.1109/WDDC.2009.4800315
PG 5
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300014
ER
PT B
AU Like, EC
Temple, MA
Gustafson, SC
AF Like, E. C.
Temple, M. A.
Gustafson, S. C.
GP IEEE
TI Intra-Symbol SMSE Waveform Design Amidst Coexistent 802.11 OFDM Signals
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
AB Spectrally Modulated, Spectrally Encoded (SMSE) waveform designs are optimized in a coexistent environment by independently selecting intra-symbol subcarrier power and modulation order. As demonstrated previously with Direct Sequence Spread Spectrum (DSSS) primary users (PU), SMSE waveform applicability is extended here using a coexistent environment containing multiple OFDM-based 802.11 PU signals. By exploiting statistical knowledge of PU spectral and temporal behavior, the SMSE system throughput (bits/second) can be maximized while adhering to SMSE and PU bit error rate (BER) constraints with mutual coexistent interference limited to manageable levels. Results for the SMSE-802.11 coexistent scenario demonstrate that significant performance improvement is available when the SMSE signal dynamically adapts to PU transmissions.
C1 [Like, E. C.; Temple, M. A.; Gustafson, S. C.] USAF, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Like, EC (reprint author), USAF, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM michael.temple@afit.edu
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 67
EP 71
DI 10.1109/WDDC.2009.4800316
PG 5
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300015
ER
PT B
AU Bergin, J
McNeil, S
Fomundam, L
Zulch, P
AF Bergin, Jameson
McNeil, Steven
Fomundam, Linda
Zulch, Peter
GP IEEE
TI MIMO Phased-Array for SMTI Radar
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
C1 [Bergin, Jameson; McNeil, Steven; Fomundam, Linda] Informat Syst Labs Inc, Vienna, VA 22182 USA.
[Zulch, Peter] AFRL SNRT, Air Force Res Lab, Rome, NY 13441 USA.
RP Bergin, J (reprint author), Informat Syst Labs Inc, Vienna, VA 22182 USA.
EM jsb@isl-inc.com; scm@isl-inc.com; lfomundam@isl-inc.com;
Peter.Zulch@rl.af.mil
NR 1
TC 0
Z9 0
U1 2
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 123
EP 123
DI 10.1109/WDDC.2009.4800328
PG 1
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300027
ER
PT B
AU Patton, LK
Rigling, BD
AF Patton, Lee K.
Rigling, Brian D.
GP IEEE
TI Autocorrelation and modulus constraints in radar waveform optimization
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
DE Waveform optimization; similarity constraint; ACS constraints; constant
modulus; nonlinear programming
ID SIGNAL-DESIGN; SUBJECT; CLUTTER; PERFORMANCE; PEAK
AB Two methods of constraining the, waveform autocorrelation sequence (ACS) in a radar waveform optimization problem are compared. The first method directly constrains the envelope of the waveform ACS, whereas the second method indirectly constrains the waveform ACS through the imposition of a similarity constraint. Both methods are imposed in conjunction with constraints on the waveform modulus. The resulting nonlinear programming problems were formulated for a specific example, and solved using standard numerical algorithms. The results indicate that the similarity constraint may not be a useful means of constraining the waveform ACS when the waveform modulus is simultaneously constrained. The results also demonstrate that phase-only optimization can provide a significant decrease in computation time while providing near optimal results.
C1 [Patton, Lee K.] USAF, Radar Signal Proc Branch, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Rigling, Brian D.] Wright State Univ, Dept Elect Engn, Dayton, OH USA.
RP Patton, LK (reprint author), USAF, Radar Signal Proc Branch, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM lee.patton@wpafb.af.mil; brian.rigling@wright.edu
NR 23
TC 4
Z9 4
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 150
EP +
DI 10.1109/WDDC.2009.4800335
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300034
ER
PT B
AU Fuhrmann, DR
Browning, JP
Rangaswamy, M
AF Fuhrmann, Daniel R.
Browning, J. Paul
Rangaswamy, Muralidhar
GP IEEE
TI CONSTANT-MODULUS PARTIALLY CORRELATED SIGNAL DESIGN FOR UNIFORM LINEAR
AND RECTANGULAR MIMO RADAR ARRAYS
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
DE MIMO radar; transmit beamforming
AB A method for generating partially correlated signals that result in arbitrary rectangular transmit beampatterns in a MIMO radar system is described. These signals are computed using frequency-offset complex exponentials (I-D) or Kronecker products of frequency-offset complex exponentials (2-D), followed by pointwise multiplication of the transmit signal vectors by a scalar pseudo-noise spreading sequence. Except for the spreading sequence, which can be pre-computed, the signals are given in closed form and thus require no numerical optimization. The transmit beampattern shape is controlled by one scalar parameter in I-D and two scalar parameters in 2-D. The transmit beampattern is the convolution of a rectangle with a sinc-squared function in I-D, and the separable product of such functions in 2-D. The signals are constant-modulus, have desirable temporal autocorrelation properties, and are simple to compute.
C1 [Fuhrmann, Daniel R.] Michigan Technol Univ, Dept Elect & Comp Engn, Houghton, MI 49931 USA.
[Browning, J. Paul; Rangaswamy, Muralidhar] US Air Force, Res Lab, Radar Signal Proc Branch, Sensors Directorate, Wright Patterson AFB, OH USA.
RP Fuhrmann, DR (reprint author), Michigan Technol Univ, Dept Elect & Comp Engn, Houghton, MI 49931 USA.
FU U.S. Air Force Office of Scientific Research
FX This work was supported in part by the U.S. Air Force Office of
Scientific Research under the auspices of the 2008 ASEE Summer Faculty
Fellowship Program.
NR 5
TC 4
Z9 4
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 197
EP +
DI 10.1109/WDDC.2009.4800344
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300043
ER
PT B
AU Stuff, M
Thelen, B
Subotic, N
Parker, J
Browning, JP
AF Stuff, Mark
Thelen, Brian
Subotic, Nikola
Parker, Jason
Browning, James Paul
GP IEEE
TI Optimization and Waveforms for Compressive Sensing Applications in the
Presence of Interference
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
AB Compressive sensing concepts have potential applications to multiple RADAR problems, which include Moving Target Indication, and RADAR imaging in two and three spatial dimensions. Currently known sufficient conditions for reliable sparse signal reconstruction do not seem to be directly applicable or practical for some traditional RADAR problems. But experiments and mathematical invariance properties of some reconstruction methods indicate that useful products can often be obtained using these methods for circumstances outside the usual conditions.
C1 [Stuff, Mark; Thelen, Brian; Subotic, Nikola] MTRI, Ann Arbor, MI 48105 USA.
[Parker, Jason; Browning, James Paul] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
RP Stuff, M (reprint author), MTRI, Ann Arbor, MI 48105 USA.
EM mark.stuff@mtu.edu; brian.thelen@mtu.edu; nikola.subotic@mtu.edu;
Jason.Parker@wpafb.af.mil; James.Browning@wpafb.af.mil
FU Air Force Research Laboratory [FA8750-05-C-0237]
FX This work was performed under Air Force Research Laboratory Contract
FA8750-05-C-0237. The monitoring office is AFRL/SNRT. The technical
point of contact is Mr. Howard Beyer (315)-330-1476. Their support is
gratefully acknowledged.
NR 13
TC 3
Z9 4
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 213
EP +
DI 10.1109/WDDC.2009.4800347
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300046
ER
PT B
AU Mendelson, H
Zulch, P
AF Mendelson, Howard
Zulch, Peter
GP IEEE
TI Mitigation of Radar Range Ambiguities via Waveform Diversity
SO 2009 INTERNATIONAL WAVEFORM DIVERSITY AND DESIGN CONFERENCE
LA English
DT Proceedings Paper
CT International Waveform Diversity and Design Conference
CY FEB 08-13, 2009
CL Kissimmee, FL
SP SELEX, NORTHROP GRUMMAN, Capraro Technol, ANDRO Computat Solut, IEEE, AESS, Off Naval Res, Sci & Technol, APS, IEEE Geosci & Remote Sensing Soc
AB The USAF is considering a number of radar systems as a method to achieve persistent intelligence, surveillance and reconnaissance (ISR) over the Earth's surface. A comprehensive approach must be taken that identifies feasible radar system parameters, geometry, area coverage and processing approaches that will provide needed moving target indication MTI (both ground and air) performance.
From the signal processing perspective, there are a number of unique technical challenges facing this concept. Issues which will need to be addressed include the restriction of antenna aperture and the need to locate and detect targets at shallow grazing angles
These and other phenomenology will impact the ability of algorithms implemented by the system to perform image formation, target detection and parameter estimation. This paper presents a new approach to the problem of radar range ambiguities in synthetic aperture radar (SAR) imagery and surface moving target indication (SMTI). By using a combination a priori knowledge of the collection geometry, orthogonal waveforms and an alternative approach to traditional matched filter processing, it can be shown that the effects of the ambiguities can be mitigated and provide image quality and SMTI performance with little degradation as compared to the non-ambiguous case.
C1 [Mendelson, Howard] Trident Syst, 10201 Fairfax Blvd, Fairfax, VA 22030 USA.
[Zulch, Peter] US Air Force, Res Lab, RIEC, Griffiss AFB, NY 13441 USA.
RP Mendelson, H (reprint author), Trident Syst, 10201 Fairfax Blvd, Fairfax, VA 22030 USA.
EM howard.mendelson@tridsys.com; peter.zulch@rl.af.mil
FU Air Force Research Laboratory, Sensors Directorate [F30602-01-C-0150,
FA8750-04-C-0230]
FX This work was supported in part by the Air Force Research Laboratory,
Sensors Directorate, under contract numbers F30602-01-C-0150 and
FA8750-04-C-0230
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2970-7
PY 2009
BP 218
EP +
DI 10.1109/WDDC.2009.4800348
PG 2
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BJX47
UT WOS:000267356300047
ER
PT B
AU Schweitzer, D
Boleng, J
Hughes, C
Murphy, L
AF Schweitzer, Dino
Boleng, Jeff
Hughes, Colin
Murphy, Louis
BE Frincke, DA
Gates, CE
Goodall, JR
Erbacher, RF
TI Visualizing Keyboard Pattern Passwords
SO 6TH INTERNATIONAL WORKSHOP ON VISUALIZATION FOR CYBER SECURITY 2009
LA English
DT Proceedings Paper
CT 6th International Workshop on Visualization for Cyber Security 2009
CY OCT 11, 2009
CL Atlantic City, NJ
SP IEEE Comp Soc, Visualizat & Graph Techn Comm
DE Visualization; security; passwords
AB Passwords are a fundamental security vulnerability in many systems. Several researchers have investigated the tradeoff between password memorability versus resiliency to cracking and have looked at alternative systems such as graphical passwords and biometrics. To create stronger passwords, many systems enforce rules regarding the required length and types of characters passwords must contain. Another suggested approach is to use passphrases to combat dictionary attacks. One common "trick" used to remember passwords that conform to complex rules is to select a pattern of keys on the keyboard. While appearing random, the pattern is easy to remember. The purpose of this research was to investigate how often patterns are used, whether patterns could be classified into common categories, and whether those categories could be used to attack and defeat pattern-based passwords. Visualization techniques were used to collect data and assist in pattern categorization. The approach successfully identified two out of eleven passwords in a real-world password file that were not discovered with a traditional dictionary attack. This paper will present the approach used to collect and categorize patterns, and describe the resulting attack method that successfully identified passwords in a live system.
C1 [Schweitzer, Dino; Boleng, Jeff; Hughes, Colin; Murphy, Louis] USAF Acad, HQ USAFA DFCS, Colorado Springs, CO 80840 USA.
RP Schweitzer, D (reprint author), USAF Acad, HQ USAFA DFCS, 6G-101, Colorado Springs, CO 80840 USA.
EM dino.schweitzer@usafa.edu
NR 5
TC 4
Z9 4
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5413-6
PY 2009
BP 69
EP 73
PG 5
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BVH52
UT WOS:000291569000009
ER
PT B
AU Martin, RK
AF Martin, Richard K.
BE Ibnkahla, M
TI Adaptive Equalization for Wireless Channels
SO ADAPTIVE SIGNAL PROCESSING IN WIRELESS COMMUNICATIONS
SE Electrical Engineering and Applied Signal Processing Series
LA English
DT Article; Book Chapter
ID DOUBLY SELECTIVE CHANNELS; SELF-RECOVERING EQUALIZATION; NETWORK ECHO
CANCELLATION; CARRIER FREQUENCY OFFSET; BLIND EQUALIZATION; AUTOMATIC
EQUALIZATION; DATA-TRANSMISSION; ML ESTIMATION; QAM SIGNALS; ALGORITHM
C1 USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Martin, RK (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
NR 65
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-4601-4
J9 ELECTR ENG APPL SIGN
PY 2009
BP 235
EP 268
PG 34
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BJY38
UT WOS:000267418300009
ER
PT S
AU Torvik, PJ
AF Torvik, Peter J.
BE Lin, HT
Zhu, D
TI COATINGS FOR ENHANCED PASSIVE DAMPING
SO ADVANCED CERAMIC COATINGS AND INTERFACES III
SE CERAMIC ENGINEERING AND SCIENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 32nd International Conference on Advanced Ceramics and Composites
CY JAN 27-FEB 01, 2008
CL Daytona Beach, FL
SP Amer Ceram Soc, ACerS Engn Ceram Div
ID CERAMIC COATINGS
AB The amplitude of vibration in a structure undergoing resonant vibration is governed by the total damping of the system. As the inherent damping of materials suitable for use in the fabrication of structures and machine components is often quite low, increasing the total system damping by including a dissipative material or mechanism can often provide significant reductions in the peak values of response (stress, strain, and displacement), enabling more efficient designs and enhanced performance. Available methodologies include active dampers and such passive techniques as friction and impact dampers and constrained layer treatments. It has also been found that metals and ceramics applied as free-layer hard coatings by plasma spray or electron beam physical vapor deposition add significant damping to vibrating members. In order to incorporate the influence of a damping coating in a prediction of system response during a preliminary design, it is essential that properties of the coating be known. The relevant damping characteristic is a measure of the energy dissipated by a homogeneous unit volume of material undergoing a completely reversed cycle of oscillation. A useful metric for this is the loss modulus. As all of these materials are inherently non-linear, as evidenced by amplitude-dependent measures of damping, determinations of properties must be made at the levels of strain appropriate to the application. Methods for determining the damping properties of materials are discussed, and comparisons are made of the damping of various classes of materials with those of ceramic coatings deposited by plasma spray or electron beam physical vapor deposition.
C1 USAF, Inst Technol, Xenia, OH USA.
RP Torvik, PJ (reprint author), USAF, Inst Technol, Xenia, OH USA.
NR 17
TC 0
Z9 0
U1 2
U2 4
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 0196-6219
BN 978-0-470-34495-8
J9 CERAM ENG SCI PROC
PY 2009
VL 29
IS 4
BP 3
EP 18
PG 16
WC Materials Science, Ceramics; Materials Science, Coatings & Films
SC Materials Science
GA BJD49
UT WOS:000265016500001
ER
PT J
AU Wang, G
Liaw, PK
Senkov, ON
Miracle, DB
Morrison, ML
AF Wang, Gongyoo
Liaw, Peter K.
Senkov, Oleg N.
Miracle, Daniel B.
Morrison, Mark L.
TI Mechanical and Fatigue Behavior of Ca65Mg15Zn20 Bulk-Metallic Glass
SO ADVANCED ENGINEERING MATERIALS
LA English
DT Article
ID CA-MG-ZN; COMPRESSIVE STRESS STATES; THERMAL-STABILITY;
AMORPHOUS-ALLOYS; FORMING ABILITY; INSTRUMENTED INDENTATION; VICKERS
INDENTATION; SPLITTING FAILURE; SHEAR BANDS; STRAIN-RATE
AB A number of BMGs, such as Zr-, Fe-, Pd-, Al-,and Ni-based alloys, have been discovered after the rapid development of glass-forming alloys during the early 1990s.([1 4]) Ca-Mg-Cu and Ca-Mg-Cu-Ag BMGs were successfully fabricated by Amiya and Inoue in 2002.([5,6]) Following these reports, numerous Ca-based BMG systems have been produced and studied.([5 21]) Ca-based BMG alloys are of interest because of their unique properties, such as low density (similar to 2.0 g cc (1)), low Young's modulus (similar to 17-20 GPa) that is comparable to the modulus of human bones, low glass-transition temperature (T-g similar to 100 degrees C) and a wide super-cooled liquid temperature range (Delta T-xg T-x - T-g approximate to 30-80 C).([15,18]) Elements such as Ca, Mg, and Zn are biocompatible, which makes the Ca-Mg-Zn-based alloys attractive for use in biomedical applications.([18])
The amorphous structure gives unique properties to BMGs, including high elastic strain, high fracture strength, and high fatigue resistance. Although the mechanical behavior of BMGs is studied widely, ([1-4,22,23]) there is no fatigue data for Ca-based BMGs. A comprehensive understanding based on the compression, hardness, and fatigue behavior is critically important for the application of the Ca-based BMGs. In the current paper, the compression behavior, Vickers hardness, and fatigue characteristics of Ca65Mg15Zn20 BMGs were investigated at room temperature in air. A mechanistic understanding of the fatigue and fracture mechanisms of Ca-based BMGs is proposed.
C1 [Wang, Gongyoo; Liaw, Peter K.; Morrison, Mark L.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Senkov, Oleg N.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Miracle, Daniel B.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Wang, G (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM gwang@utlr.edu
RI Wang, Gongyao/C-4003-2011; Senkov, Oleg/C-7197-2012; BAI,
JIE/D-7448-2016;
OI Senkov, Oleg/0000-0001-5587-415X; Morrison, Mark/0000-0003-1956-0932
NR 61
TC 11
Z9 11
U1 2
U2 25
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1438-1656
J9 ADV ENG MATER
JI Adv. Eng. Mater.
PD JAN
PY 2009
VL 11
IS 1-2
BP 27
EP 34
DI 10.1002/adem.200800313
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA 418CC
UT WOS:000264123800003
ER
PT S
AU Schrader, K
Mullins, B
Peterson, G
Mills, R
AF Schrader, Karl
Mullins, Barry
Peterson, Gilbert
Mills, Robert
BA Shenoi, S
BF Shenoi, S
BE Peterson, G
TI TRACKING CONTRABAND FILES TRANSMITTED USING BITTORRENT
SO ADVANCES IN DIGITAL FORENSICS V
SE IFIP Advances in Information and Communication Technology
LA English
DT Proceedings Paper
CT 5th IFIP International Conference on Digital Forensics
CY JAN 26-28, 2009
CL Natl Ctr Forens Sci, Orlando, FL
SP IFIP WG 11 9
HO Natl Ctr Forens Sci
DE Peer-to-peer file sharing; Bit Torrent; forensic tool; packet analysis
AB This paper describes a digital forensic tool that uses an FPGA-based embedded software application to identify and track contraband digital files shared using the Bit Torrent protocol. The system inspects each packet on a network for a Bit Torrent Handshake message, extracts the "info hash" of the file being shared, compares the hash against a list of known contraband files and, in the event of a match, adds the message to a log file for forensic analysis. Experiments demonstrate that the system is able to successfully capture and process Bit Torrent Handshake messages with a probability of at least 99.0% under a network traffic load of 89.6 Mbps on a 100 Mbps network.
C1 [Schrader, Karl; Mullins, Barry; Peterson, Gilbert; Mills, Robert] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Schrader, K (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 11
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1868-4238
BN 978-3-642-04154-9
J9 IFIP ADV INF COMM TE
PY 2009
VL 306
BP 159
EP 173
PG 15
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Telecommunications
SC Computer Science; Telecommunications
GA BQX67
UT WOS:000282066400012
ER
PT B
AU Pachter, M
AF Pachter, Meir
BE Bernhard, P
Gaitsgory, V
Pourtallier, O
TI The LQG Game Against Nature
SO ADVANCES IN DYNAMIC GAMES AND THEIR APPLICATIONS
SE ANNALS OF THE INTERNATIONAL SOCIETY OF DYNAMIC GAMES
LA English
DT Proceedings Paper
CT 12th International Symposium on Dynamic Games and Applications
CY JUL 03-06, 2006
CL Sophia Antipolis, FRANCE
DE LQG Game; Stochastic Game; Stochastic Dynamic Programming
AB A novel Linear Quadratic Gaussian (LQG) control paradigm where the realization of the random disturbance is known at decision time is introduced. A game of chance is played where Nature randomly chooses the disturbance signal and the player, having access to the random disturbance information, employs a feedback/stroboscopic strategy. The closed-form optimal solution is derived and is compared to the solution of the classical LQG problem. Furthermore, the Gaussian assumption is relaxed and the interesting game theoretic interpretation is analyzed.
C1 USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Pachter, M (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM meir.pachter@afit.edu
NR 6
TC 0
Z9 0
U1 0
U2 0
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-4833-6
J9 ANN INT SOC DYN GAME
PY 2009
VL 10
BP 339
EP 353
DI 10.1007/978-0-8176-4834-3_17
PG 15
WC Operations Research & Management Science; Mathematics, Interdisciplinary
Applications
SC Operations Research & Management Science; Mathematics
GA BJV54
UT WOS:000267264200017
ER
PT J
AU Mertens, CJ
Russell, JM
Mlynczak, MG
She, CY
Schmidlin, FJ
Goldberg, RA
Lopez-Puertas, M
Wintersteiner, PP
Picard, RH
Winick, JR
Xu, XJ
AF Mertens, Christopher J.
Russell, James M., III
Mlynczak, Martin G.
She, Chiao-Yao
Schmidlin, Francis J.
Goldberg, Richard A.
Lopez-Puertas, Manuel
Wintersteiner, Peter P.
Picard, Richard H.
Winick, Jeremy R.
Xu, Xiaojing
TI Kinetic temperature and carbon dioxide from broadband infrared limb
emission measurements taken from the TIMED/SABER instrument
SO ADVANCES IN SPACE RESEARCH
LA English
DT Article
DE SABER; Temperature; Carbon dioxide (CO2); Infrared remote sensing;
Non-LTE
ID MIDDLE ATMOSPHERE; THERMAL STRUCTURE; UPPER MESOSPHERE; MESOPAUSE;
MODEL; CO2; DENSITY; STORMS
AB The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment is one of four instruments on NASA's Thermosphere-Ionosphere-Energetics and Dynamics (TIMED) satellite. SABER measures broadband infrared limb emission and derives vertical profiles of kinetic temperature (Tk) from the lower stratosphere to approximately 120 km, and vertical profiles of carbon dioxide (CO,) volume mixing ratio (vmr) from approximately 70 km to 120 km. In this paper we report on SABER Tk/CO2 data in the mesosphere and lower thermosphere (MLT) region from the version 1.06 dataset. The continuous SABER measurements provide an excellent dataset to understand the evolution and mechanisms responsible for the global two-level structure of the mesopause altitude. SABER MLT Tk comparisons with ground-based sodium lidar and rocket falling sphere Tk measurements are generally in good agreement. However, SABER CO2 data differs significantly from TIME-GCM model simulations. Indirect CO2 validation through SABER-lidar MLT Tk comparisons and SABER-radiation transfer comparisons of nighttime 4.3 mu m limb emission suggest the SABER-derived CO, data is a better representation of the true atmospheric MLT CO, abundance compared to model simulations Of CO2 vmr. Published by Elsevier Ltd. on behalf of COSPAR.
C1 [Mertens, Christopher J.; Mlynczak, Martin G.] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
[Russell, James M., III] Hampton Univ, Hampton, VA 23668 USA.
[She, Chiao-Yao] Colorado State Univ, Ft Collins, CO 80523 USA.
[Schmidlin, Francis J.] NASA, Wallops Flight Facil, Wallops Isl, VA 23337 USA.
[Goldberg, Richard A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Lopez-Puertas, Manuel] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Wintersteiner, Peter P.] ARCON Corp, Waltham, MA 02451 USA.
[Picard, Richard H.; Winick, Jeremy R.] USAF, Res Labs, Hanscom AFB, MA 01731 USA.
[Xu, Xiaojing] SSAI Inc, Hampton, VA 23666 USA.
RP Mertens, CJ (reprint author), NASA, Langley Res Ctr, 21 Langley Blvd,MS 401B, Hampton, VA 23681 USA.
EM Christopher.J.Mertens@nasa.gov; james.russell@hamptonu.edu;
Martin.G.Mlynczak@nasa.gov; joeshe@lamar.colostate.edu;
fjs@osb.wff.nasa.gov; Richard.A.Goldberg@nasa.gov; puertas@iaa.es;
winters@arcon.com; richard.picard@hanscom.af.mil;
jeremy.winick@hanscom.af.mil; xiaojing_xu@ssaihq.com
RI Goldberg, Richard /E-1881-2012; Mlynczak, Martin/K-3396-2012; Lopez
Puertas, Manuel/M-8219-2013
OI Lopez Puertas, Manuel/0000-0003-2941-7734
NR 24
TC 27
Z9 27
U1 0
U2 5
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 JAN 1
PY 2009
VL 43
IS 1
BP 15
EP 27
DI 10.1016/j.asr.2008.04.017
PG 13
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 395RP
UT WOS:000262541500002
ER
PT J
AU Jeans, TL
Watt, GD
Gerber, AG
Holloway, AGL
Baker, CR
AF Jeans, T. L.
Watt, G. D.
Gerber, A. G.
Holloway, A. G. L.
Baker, C. R.
TI High-Resolution Reynolds-Averaged Navier-Stokes Flow Predictions over
Axisymmetric Bodies with Tapered Tails
SO AIAA JOURNAL
LA English
DT Article
ID TURBULENT VORTICAL FLOWS; SEPARATION
AB A comprehensive computational study is performed on two slender axisymmetric streamlined bodies with tapered tails in translation at incidence up to 30 degrees at Reynolds numbers up to 23 x 10(6). The computations are verified with the aid of a parameterized scripted hybrid mesh adapted to the separated wake. They are validated using experimental overall force and longitudinal force distribution measurements from a wind tunnel and towing tank. Overall force predictions using the Reynolds stress and shear stress transport turbulence models are within experimental uncertainty up to 25- and 15-degree incidences, respectively. A comprehensive study is made of the skin friction, surface pressure, and separation lines based on the computational results. Flowfield vorticity from the computations is used to evaluate slender-body assumptions applied to hydrodynamic impulse theory. Force distribution predictions from this theory agree well with direct integration of pressure and wall shear stress for these viscous separated flows.
C1 [Watt, G. D.] Def Res & Dev Canada Atlantic, Dartmouth, NS B2Y 3Z7, Canada.
[Gerber, A. G.; Holloway, A. G. L.; Baker, C. R.] Univ New Brunswick, Dept Mech Engn, Fredericton, NB E3A 6S3, Canada.
RP Jeans, TL (reprint author), USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA.
EM tiger.jeans.ctr@usafa.edu; george.watt@drdc-rddc.gc.ca; agerber@unb.ca;
holloway@unb.ca; w2jcl@unb.ca
FU Defence Research and Development Canada and through the Natural Sciences
and Engineering Research Council Discovery Grants
FX This work has been funded through a contract with Defence Research and
Development Canada and through the Natural Sciences and Engineering
Research Council Discovery Grants of authors Gerber and Holloway. The
authors would also like to acknowledge QinetiQ and the United Kingdom
Ministry of Defence for their contribution to the baseline Reynolds
stress model Reynolds-averaged Navier-Stokes simulations oil the
Series-58 model 4621 hull, the Institute for Aerospace Research,
National Research Council Canada, for their contributions to Defence
Research and Development Canada static-test-rig experiments, and the
U.S. Naval Surface Warfare Center Carderock Division for sharing the
Series-58 model 4621 data.
NR 38
TC 7
Z9 7
U1 0
U2 2
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD JAN
PY 2009
VL 47
IS 1
BP 19
EP 32
DI 10.2514/1.30911
PG 14
WC Engineering, Aerospace
SC Engineering
GA 393AF
UT WOS:000262342600002
ER
PT J
AU Dietrich, JJ
Quinn, JM
England, RW
AF Dietrich, Jeffrey J.
Quinn, James M.
England, Ronald W.
TI Reasons for outpatient consultation in allergy/immunology
SO ALLERGY AND ASTHMA PROCEEDINGS
LA English
DT Article
DE Allergic diagnoses; allergy/immunology; epidemiology; graduate medical
education; outpatient consultation; outpatient referral; practice
management
ID ATTITUDES; CARE
AB There is little data in the literature regarding outpatient consultation in allergy/immunology (A/I). The purpose of this study was to determine the relative-frequency of different reasons for A/I outpatient consultation to help guide graduate medical education (GME) and assist with All practice management. We retrospectively reviewed the electronic medical records of all outpatient A/I consultations - from January 1, 2006 to December 31, 2006. The study was performed at our tertiary care referral center which is a GME training site. There were 1412 A/I consults requested during the 1-year period. The consults per month ranged from a low of 69 to a high of 157. The referrals consisted of 35% pediatric and 65% adult patients. There were 52.8%, female and 47.2% male patients. We received 74.3% of referrals from primary care, 19.8% from specialty care, and 5.9% from the emergency department. The most common reasons for consultation included 808 (57.2%) patients for chronic rhinitis, 288 (20.4%), for asthma, 196 (13.9%) for food allergy, 89 (6.3%) for venom allergy, 68 (4.8%,) for atopic dermatitis, 66 (4.7%) - for drug allergy, 62 (4.4%) for chronic urticaria, 45 (3.2%) for acute urticaria, 34 (2.4%) for immunodeficiency, 37 (2.2%)for anaphylaxis, and 162 (11.5%) for other reasons, More than one reason was given for 27.1% of consults, and there was all average of 1.3 reasons for consultation per patient. Although the allergist/immunologist is consulted fir a variety of reasons, the top three reasons make up a majority of outpatient consults, and consults are Often requested to address more than one diagnosis.
C1 [Dietrich, Jeffrey J.; Quinn, James M.; England, Ronald W.] Wilford Hall USAF Med Ctr, Dept Allergy Immunol, San Antonio, TX 78236 USA.
RP Dietrich, JJ (reprint author), Dept Allergy Immunol, 59th MDOS SGOMVA,2200 Berguist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM jeffrey.dietrich@us.af.mil
NR 13
TC 15
Z9 15
U1 2
U2 3
PU OCEAN SIDE PUBLICATIONS INC
PI PROVIDENCE
PA 95 PITMAN ST, PROVIDENCE, RI 02906 USA
SN 1088-5412
J9 ALLERGY ASTHMA PROC
JI Allergy Asthma Proc.
PD JAN-FEB
PY 2009
VL 30
IS 1
BP 69
EP 74
DI 10.2500/aap.2009.30.3195
PG 6
WC Allergy
SC Allergy
GA 414HG
UT WOS:000263853900011
PM 19331722
ER
PT J
AU Balls, A
LoVecchio, F
Stapczynski, SJ
Mulrow, M
Levine, B
Berkely, R
Panacek, E
Miller, A
Norquist, C
Riviello, R
Ary, R
Rodriguez, E
Young, J
Gross, E
Mills, L
Zeger, W
AF Balls, Adam
LoVecchio, Frank
Stapczynski, Stephan J.
Mulrow, Mary
Levine, Brian
Berkely, Ross
Panacek, Ed
Miller, Andrew
Norquist, Craig
Riviello, Ralph
Ary, Roy
Rodriguez, Elliot
Young, Janet
Gross, Eric
Mills, Lisa
Zeger, Wes
TI CLEAR: Central Line Emergency Access Registry The CLEAR project protocol
methods paper
SO AMERICAN JOURNAL OF EMERGENCY MEDICINE
LA English
DT Letter
ID CENTRAL VENOUS CATHETERIZATION
C1 [Balls, Adam; LoVecchio, Frank; Stapczynski, Stephan J.; Mulrow, Mary] Maricopa Cty Gen Hosp, Dept Emergency Med, Phoenix, AZ USA.
[Panacek, Ed] Univ Calif Davis, Med Ctr, Davis, CA USA.
[Norquist, Craig] Scottsdale Osborn Healthcare, Scottsdale, AZ USA.
[Riviello, Ralph] Thomas Jefferson Univ Hosp, Philadelphia, PA 19107 USA.
[Ary, Roy] Emory Univ, Sch Med, Atlanta, GA 30322 USA.
[Rodriguez, Elliot] SUNY Upstate, Med Ctr Univ, Syracuse, NY USA.
[Young, Janet] Univ N Carolina, Chapel Hill, NC USA.
[Zeger, Wes] Univ Nebraska Med Ctr, Omaha, NE USA.
RP Balls, A (reprint author), Wilford Hall USAF Med Ctr, SAUSHEC Emergency Med Residency, Lackland AFB, TX 78236 USA.
EM frank.lovecchio@bannerhealth.com
NR 5
TC 3
Z9 3
U1 1
U2 1
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0735-6757
J9 AM J EMERG MED
JI Am. J. Emerg. Med.
PD JAN
PY 2009
VL 27
IS 1
BP 119
EP 122
DI 10.1016/j.ajem.2008.08.033
PG 4
WC Emergency Medicine
SC Emergency Medicine
GA 385NP
UT WOS:000261821200021
PM 19041547
ER
PT J
AU Belcher, WR
AF Belcher, William R.
TI The Scientific Investigations of Mass Graves: Towards Protocols and
Standard Operating Procedures
SO AMERICAN JOURNAL OF HUMAN BIOLOGY
LA English
DT Book Review
C1 [Belcher, William R.] Joint POW MIA Accounting Command, Cent Identificat Lab, Hickam AFB, HI USA.
RP Belcher, WR (reprint author), Joint POW MIA Accounting Command, Cent Identificat Lab, Hickam AFB, HI USA.
NR 1
TC 0
Z9 0
U1 4
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1042-0533
EI 1520-6300
J9 AM J HUM BIOL
JI Am. J. Hum. Biol.
PD JAN-FEB
PY 2009
VL 21
IS 1
BP 137
EP 137
DI 10.1002/ajhb.20845
PG 1
WC Anthropology; Biology
SC Anthropology; Life Sciences & Biomedicine - Other Topics
GA 387EJ
UT WOS:000261934200022
ER
PT J
AU Cook, RJ
Burns, MS
AF Cook, Richard J.
Burns, M. Shane
TI Interpretation of the cosmological metric
SO AMERICAN JOURNAL OF PHYSICS
LA English
DT Article
DE cosmology; Galaxy; general relativity; red shift; special relativity
ID UNIVERSE; SPACE; MISCONCEPTIONS
AB The cosmological Robertson-Walker metric of general relativity is often said to have the consequences that (1) the recessional velocity v of a galaxy at proper distance ... obeys the Hubble law v=H..., and therefore galaxies at sufficiently great distance ... are receding faster than the speed of light c; (2) faster than light recession does not violate special relativity theory because the latter is not applicable to the cosmological problem, and because "space itself is receding" faster than c at great distance, and it is velocity relative to local space that is limited by c, not the velocity of distant objects relative to nearby ones; (3) we can see galaxies receding faster than the speed of light; and (4) the cosmological redshift is not a Doppler shift, but is due to a stretching of photon wavelength during propagation in an expanding universe. We present a particular Robertson-Walker metric (an empty universe metric) for which a coordinate transformation shows that none of these interpretation necessarily holds. The resulting paradoxes of interpretation lead to a deeper understanding of the meaning of the cosmological metric.
C1 [Cook, Richard J.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[Burns, M. Shane] Colorado Coll, Dept Phys, Colorado Springs, CO 80903 USA.
RP Cook, RJ (reprint author), USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
EM richard.cook@usafa.edu; sburns@coloradocollege.edu
NR 22
TC 9
Z9 9
U1 0
U2 2
PU AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0002-9505
J9 AM J PHYS
JI Am. J. Phys.
PD JAN
PY 2009
VL 77
IS 1
BP 59
EP 66
DI 10.1119/1.2987790
PG 8
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA 415XN
UT WOS:000263969900020
ER
PT J
AU Kotti, GH
Morris, MJ
Bell, DG
AF Kotti, G. H.
Morris, M. J.
Bell, D. G.
TI Are Obstructive Spirometric Indices with FEV1 > 95% a Normal Physiologic
Variant.
SO AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE
LA English
DT Meeting Abstract
C1 [Kotti, G. H.] Wilford Hall USAF Med Ctr, San Antonio, TX USA.
[Morris, M. J.; Bell, D. G.] Brook Army Med Ctr, San Antonio, TX USA.
EM george.kotti@lackland.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER THORACIC SOC
PI NEW YORK
PA 61 BROADWAY, FL 4, NEW YORK, NY 10006 USA
SN 1073-449X
J9 AM J RESP CRIT CARE
JI Am. J. Respir. Crit. Care Med.
PY 2009
VL 179
MA A4331
PG 1
WC Critical Care Medicine; Respiratory System
SC General & Internal Medicine; Respiratory System
GA V29FA
UT WOS:000208733103684
ER
PT J
AU Ner, Y
Grote, JG
Stuart, JA
Sotzing, GA
AF Ner, Yogesh
Grote, James G.
Stuart, Jeffrey A.
Sotzing, Gregory A.
TI White Luminescence from Multiple-Dye-Doped Electrospun DNA Nanofibers by
Fluorescence Resonance Energy Transfer
SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
LA English
DT Article
DE DNA; electrospinning; energy transfer; nanostructures; self-assembly
ID SURFACTANT COMPLEX; POLYMER NANOFIBERS; QUANTUM DOTS; THIN-FILMS;
EMISSION; DYNAMICS
C1 [Sotzing, Gregory A.] Univ Connecticut, Dept Chem, Polymer Program, Storrs, CT 06269 USA.
[Grote, James G.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Stuart, Jeffrey A.] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA.
RP Sotzing, GA (reprint author), Univ Connecticut, Dept Chem, Polymer Program, 97 N Eagleville Rd, Storrs, CT 06269 USA.
EM sotzing@mail.ims.uconn.edu
NR 25
TC 61
Z9 61
U1 4
U2 38
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1433-7851
J9 ANGEW CHEM INT EDIT
JI Angew. Chem.-Int. Edit.
PY 2009
VL 48
IS 28
BP 5134
EP 5138
DI 10.1002/anie.200900885
PG 5
WC Chemistry, Multidisciplinary
SC Chemistry
GA 468IE
UT WOS:000267809800010
PM 19504507
ER
PT J
AU Burke, WJ
Huang, CY
Sharma, RD
AF Burke, W. J.
Huang, C. Y.
Sharma, R. D.
TI Stormtime dynamics of the global thermosphere and equatorial ionosphere
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Ionosphere; Electric fields and currents; Ionosphere-atmosphere
interactions; Ionospheric irregularities
ID ZONAL ELECTRIC-FIELDS; PLASMA BUBBLES; PREREVERSAL ENHANCEMENT;
DISTURBANCE DYNAMO; TOPSIDE IONOSPHERE; RING CURRENT; MAGNETOSPHERE;
DMSP; CLIMATOLOGY; PENETRATION
AB During magnetic storms the development of equatorial plasma bubbles (EPBs) and distributions of thermospheric densities are strongly influenced by the histories of imposed magnetospheric electric (epsilon(M)) fields. Periods of intense EPB activity driven by penetration epsilon(M) fields in the main phase are followed by their worldwide absence during recovery. A new method is applied to estimate global thermospheric energy (E(th)) budgets from orbit-averaged densities measured by accelerometers on polar-orbiting satellites. During the main phase of storms Eth increases as long as the stormtime epsilon(M) operates, then exponentially decays toward quiet-time values during early recovery. Some fraction of the energy deposited at high magnetic latitudes during the main phase propagates into the subauroral ionosphere-thermosphere where it affects chemical and azimuthal-wind dynamics well into recovery. We suggest a scenario wherein fossils of main phase activity inhibit full restoration of quiet-time dayside dynamos and pre-reversal enhancements of upward plasma drifts near dusk denying bottomside irregularities sufficient time to grow into EPBs.
C1 [Burke, W. J.; Huang, C. Y.; Sharma, R. D.] USAF, Space Vehicles Directorate, Res Lab, Hanscom AFB, MA USA.
[Burke, W. J.] Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
RP Burke, WJ (reprint author), USAF, Space Vehicles Directorate, Res Lab, Hanscom AFB, MA USA.
EM afrl.rvb.pa@hanscom.af.mil
FU Air Force Office of Scientific Research Task [2311SDA3]
FX Research summarized here was supported by the Air Force Office of
Scientific Research Task 2311SDA3 and reflects helpful discussions with
David Anderson and Naomi Murayama of the University of Colorado, CIRES
and Matthew Hei of Boston College. The authors are especially grateful
for the help of L. C. Gentile of Boston College in preparing the
manuscript for publication.; Topical Editor K. Kauristie thanks B.
Bowman and another anonymous referee for their help in evaluating this
paper.
NR 39
TC 4
Z9 4
U1 0
U2 1
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 5
BP 2035
EP 2044
PG 10
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 450NC
UT WOS:000266406300022
ER
PT J
AU Kalogerakis, KS
Slanger, TG
Kendall, EA
Pedersen, TR
Kosch, MJ
Gustavsson, B
Rietveld, MT
AF Kalogerakis, K. S.
Slanger, T. G.
Kendall, E. A.
Pedersen, T. R.
Kosch, M. J.
Gustavsson, B.
Rietveld, M. T.
TI Remote Oxygen Sensing by Ionospheric Excitation (ROSIE)
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Atmospheric composition and structure; Airglow and aurora; Instruments
and techniques; Space plasma physics; Active perturbation experiments
ID PUMP ENHANCED AIRGLOW; POWERFUL RADIO-WAVES; ARTIFICIAL AIRGLOW;
OPTICAL-EMISSIONS; COLLISIONAL EXCITATION; O(1D) ATOMS; F-REGION;
O(D-1); THERMOSPHERE; O-2
AB The principal optical observable emission resulting from ionospheric modification (IM) experiments is the atomic oxygen red line at 630 nm, originating from the O((1)D-(3)P) transition. Because the O((1)D) atom has a long radiative lifetime, it is sensitive to collisional relaxation and an observed decay faster than the radiative rate can be attributed to collisions with atmospheric species. In contrast to the common practice of ignoring O-atoms in interpreting such observations in the past, recent experimental studies on the relaxation of O((1)D) by O((3)P) have revealed the dominant role of oxygen atoms in controlling the lifetime of O((1)D) at altitudes relevant to IM experiments. Using the most up-to-date rate coefficients for collisional relaxation of O((1)D) by O, N(2), and O(2), it is now possible to analyze the red line decays observed in IM experiments and thus probe the local ionospheric composition. In this manner, we can demonstrate an approach to remotely detect O-atoms at the altitudes relevant to IM experiments, which we call remote oxygen sensing by ionospheric excitation (ROSIE). The results can be compared with atmospheric models and used to study the temporal, seasonal, altitude and spatial variation of ionospheric O-atom density in the vicinity of heating facilities. We discuss the relevance to atmospheric observations and ionospheric heating experiments and report an analysis of representative IM data.
C1 [Kalogerakis, K. S.; Slanger, T. G.] SRI Int, Mol Phys Lab, Menlo Pk, CA 94025 USA.
[Kendall, E. A.] SRI Int, Ctr Geospace Studies, Menlo Pk, CA 94025 USA.
[Pedersen, T. R.] USAF, Space Vehicles Directorate, Res Lab, Hanscom Afb, MA USA.
[Kosch, M. J.] Univ Lancaster, Lancaster, England.
[Gustavsson, B.] Univ Tromso, Dept Phys & Technol, N-9001 Tromso, Norway.
[Rietveld, M. T.] EISCAT Sci Assoc, Ramfjordbotn, Norway.
RP Kalogerakis, KS (reprint author), SRI Int, Mol Phys Lab, Menlo Pk, CA 94025 USA.
EM ksk@sri.com
FU US National Science Foundation [ATM-0737713]; AFOSR [2311AS]
FX This work is supported by the CEDAR Program of the US National Science
Foundation under grant no. ATM-0737713. Work at AFRL was supported by
AFOSR task 2311AS. We are indebted to the ISEA-12 committee for the
opportunity to present our research and for their efforts in organizing
a high-quality meeting. Finally, we thank two anonymous reviewers for
their comments and suggestions.
NR 41
TC 13
Z9 13
U1 0
U2 6
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 5
BP 2183
EP 2189
PG 7
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 450NC
UT WOS:000266406300035
ER
PT J
AU La Shell, MS
Tankersley, MS
AF La Shell, Mark S.
Tankersley, Michael S.
TI Antibiotics for the allergist: part 2
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Review
ID STAPHYLOCOCCUS-AUREUS INFECTION; RANDOMIZED CONTROLLED-TRIAL;
ATOPIC-DERMATITIS; CHLAMYDIA-PNEUMONIAE; DOUBLE-BLIND; PULMONARY
INFLAMMATION; CHRONIC RHINOSINUSITIS; MACROLIDE ANTIBIOTICS; ASTHMA
EXACERBATIONS; AIRWAY INFLAMMATION
AB Objective: To review antibiotic use and selection for disorders commonly seen in allergy practice.
Data Sources: MEDLINE searches were performed cross-referencing antibiotic, antimicrobial, management, and treatment With Multiple disorders commonly seen in allergy practice. References of the chosen articles were also examined.
Study Selection: Articles were selected based on their relevance to the subject matter.
Results: A large body of research is available relevant to both conventional and novel uses of antibiotics. The use of antibiotics is in question for some disorders, whereas novel approaches to therapy with macrolide antibiotics are areas of active investigation. Meanwhile, patterns of microbial resistance continue to evolve.
Conclusion: For decades, antibiotics have been traditional first-line treatment for many disorders. Currently, this paradigm appears to be shifting as periods of observation come into favor and nonbacterial causes of inflammation are under greater scrutiny. Nonetheless, appropriate antibiotic selection often remains it key element in the treatment of these disorders. Knowledge of the relevant microbiology is an inherent requirement in selecting antibiotic therapies and necessitates awareness Of Current trends in bacterial resistance.
C1 [La Shell, Mark S.; Tankersley, Michael S.] Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, San Antonio, TX 78236 USA.
RP La Shell, MS (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, 2200 Bergquist Dr,Suite 1, San Antonio, TX 78236 USA.
EM mark.lashell@lackland.af.mil
NR 59
TC 1
Z9 1
U1 0
U2 0
PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY
PI ARLINGTON HTS
PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA
SN 1081-1206
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD JAN
PY 2009
VL 102
IS 1
BP 1
EP 7
PG 7
WC Allergy; Immunology
SC Allergy; Immunology
GA 392WQ
UT WOS:000262333300002
PM 19205278
ER
PT J
AU Rans, TS
Hrabak, TM
Whisman, BA
Grier, TJ
LeFevre, DM
Kwon, PO
Tankersley, MS
AF Rans, Tonya S.
Hrabak, Todd M.
Whisman, Bonnie A.
Grier, Thornas J.
LeFevre, Dawn M.
Kwon, Paul O.
Tankersley, Michael S.
TI Compatibility of imported fire ant whole body extract with cat, ragweed,
Dermatophagoides pteronyssinus, and timothy grass allergens
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Article
ID SOLENOPSIS-INVICTA; IMMUNOTHERAPY; DEGRADATION; STABILITY; COCKROACH
AB Background: Recommendations regarding the administration of imported fire ant whole body extract (IFA WBE) combined with aeroallergens or environmental allergen,; in a single immunotherapy injection are lacking.
Objective: To evaluate the degradative effect of IFA WBE on cat, ragweed, Dermatophagoides pteronyssinus, and timothy grass allergens.
Methods: Imported fire ant whole body extract was combined with extracts of cat, ragweed, D pteronyssinus, and timothy grass. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was performed on each sample after storage for 0, 1, 3, and 6 months at 4 degrees C. In addition, cat and ragweed combinations were evaluated by radial immunodiffusion (RID); D pteronyssinus by enzyme-linked immunosorbent assay (ELISA) inhibition; and timothy grass by ELISA inhibition and Western blot.
Results: Imported fire ant whole body extract combined with timothy grass demonstrated degradation of timothy grass allergens by SDS-PAGE, ELISA inhibition, and Western blot results. Cat and ragweed allergens were stable after mixing with IFA WBE, based on SDS-PAGE and RID analyses. Stability of D pteronyssinus allergens with IFA WBE was evident from SDS-PAGE and ELISA inhibition data.
Conclusions: Imported fire ant whole body extract combined with timothy grass resulted in significant and rapid timothy protein degradation. Imported fire ant. whole body extract mixed with cat, ragweed, or D pteronyssinus revealed aeroallergen stability, yielding the possibility of combining these extracts in a single immunotherapy injection. Compatibilities of IFA WBE with other common aeroallergens remain undetermined and thus are not recommended for single-injection immunotherapy formulations.
C1 [Rans, Tonya S.; Hrabak, Todd M.; Whisman, Bonnie A.; Kwon, Paul O.; Tankersley, Michael S.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
[Grier, Thornas J.; LeFevre, Dawn M.] Greer Labs, Lenoir, NC USA.
RP Rans, TS (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM tonya.rans@nellis.af.mil
NR 18
TC 8
Z9 8
U1 0
U2 0
PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY
PI ARLINGTON HTS
PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA
SN 1081-1206
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD JAN
PY 2009
VL 102
IS 1
BP 57
EP 61
PG 5
WC Allergy; Immunology
SC Allergy; Immunology
GA 392WQ
UT WOS:000262333300011
PM 19205287
ER
PT S
AU Jackson, T
Roycroft, SM
Levi, A
AF Jackson, Tyrone
Roycroft, Steven M.
Levi, Alejandro
GP IEEE
TI Seven Key Principles of Orbital Safety Management
SO ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM, 2009 PROCEEDINGS
SE Reliability and Maintainability Symposium
LA English
DT Proceedings Paper
CT 55th Annual Reliability and Maintainability Symposium
CY JAN 26-29, 2009
CL Ft Worth, TX
DE System safety; Safety design; Orbital safety; Orbital debris; On-orbit
hazard analysis; Mission Assurance
AB The main System Safety issue facing several Air Force satellite acquisition programs is non-compliance of the contractor's System Safety Program (SSP) with regard to Air Force Instruction (AFI) Orbital Safety requirements. Prior to June 2006, the majority of defense satellite contractors believed it was acceptable to limit their on-orbit hazard analysis effort to considering potential collisions between man-made objects. They believed that the routine Mission Assurance analyses, excluding hazard analysis, could cost-effectively mitigate the risk of on-orbit mishaps due to safety-critical hazards if the USAF would give them relief from requirements to deliver "non-value-added" military standard/handbook data products. This belief was not openly challenged by the SMC Central Safety Office until 2006. Today, the SMC Central Safety Office ensures all Air Force satellite acquisition programs are aware that the contractor's SSP must be AFI Orbital Safety compliant, which includes producing documented evidence that the on-orbit operations hazard analysis is completed. To facilitate this awareness leading to appropriately managed SSPs, each Air Force satellite acquisition program has an appointed System Safety Manager (SSM) who represents and reports directly to the Acquisition Program Manager. All SSMs are thoroughly familiar with the Orbital Safety "bible" AFI 91-202, Air Force Space Command (AFSPC) Supplement 1, The US Air Force Mishap Prevention Program [1]. This AFI defines the criteria for an appropriate Orbital Safety effort. However, contractors are not required to follow any AFI policy elements that are not included in the contract. Often the only tool available to the SSM to initiate an AFI compliant Orbital Safety effort is a tailored MIL-STD-882C [2] that is on contract. One might assume that this tool alone would be sufficient to guarantee an AFI compliant Orbital Safety effort. Nonetheless, defense satellite acquisition history has shown this assumption to be false. Rather, there are additional tools, in the form of seven Orbital Safety key principles, which Air Force satellite acquisition programs must adopt to ensure their contractor's System Safety Program Plan (SSPP) fully addresses AFI policies. These seven principles are best captured in the acquisition program's System Safety Management Plan (SSMP), but they also can be effectively implemented through an Air Force Operating Instruction (OI). This paper answers the question, "How can the SSMP be tailored to assure the Acquisition Program Manager that the Orbital Safety effort is AFI compliant?"
C1 [Jackson, Tyrone] ManTech SRS Technol Inc, SBIRS Mission Assurance, ISSW ENT, 615 Nash St,Suite 200, El Segundo, CA 90245 USA.
[Roycroft, Steven M.] USAF, ISSW ENT, El Segundo, CA 90245 USA.
[Levi, Alejandro] USAF Space & Missile Syst Ctr, Space Syst Safety Engn, SMC SES, El Segundo, CA 90245 USA.
RP Jackson, T (reprint author), ManTech SRS Technol Inc, SBIRS Mission Assurance, ISSW ENT, 615 Nash St,Suite 200, El Segundo, CA 90245 USA.
EM Tyrone.Jackson.ctr@losangeles.af.mil; Steven.Roycroft@losangeles.af.mil;
Alejandro.Levi@losangeles.af.mil
RI Levi, Alejandro/G-4033-2015
OI Levi, Alejandro/0000-0001-8450-8597
NR 9
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-144X
BN 978-1-4244-2508-2
J9 P REL MAINT S
PY 2009
BP 229
EP +
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA BLM45
UT WOS:000270538700041
ER
PT J
AU Muratore, C
Voevodin, AA
AF Muratore, C.
Voevodin, A. A.
TI Chameleon Coatings: Adaptive Surfaces to Reduce Friction and Wear in
Extreme Environments
SO ANNUAL REVIEW OF MATERIALS RESEARCH
SE Annual Review of Materials Research
LA English
DT Review; Book Chapter
DE tribology; high temperature; aerospace; surface analysis; electron
microscopy
ID DIAMOND-LIKE CARBON; YTTRIA-STABILIZED ZIRCONIA; PULSED LASER
DEPOSITION; NANOCOMPOSITE TRIBOLOGICAL COATINGS; TRANSMISSION
ELECTRON-MICROSCOPY; TEMPERATURE SOLID LUBRICANT; SPUTTERED MOS2 FILMS;
THIN-FILMS; VAPOR-DEPOSITION; AMORPHOUS-CARBON
AB Adaptive nanocomposite coating materials that automatically and reversibly adjust their surface composition and morphology via multiple mechanisms are a promising development for the reduction of friction and wear over broad ranges of ambient conditions encountered in aerospace applications, such as cycling of temperature and atmospheric composition. Materials selection for these composites is based on extensive study of interactions occurring between solid lubricants and their surroundings, especially with novel in situ surface characterization techniques used to identify, adaptive behavior oil size scales ranging from 10(-10) to 10(-4) m. Recent insights oil operative solid-lubricant mechanisms and their dependency upon the ambient environment are reviewed as a basis for a discussion of the state of the art in solid-lubricant materials.
C1 [Muratore, C.; Voevodin, A. A.] USAF, Res Lab, Thermal Sci & Mat Branch, Wright Patterson AFB, OH 45433 USA.
RP Muratore, C (reprint author), USAF, Res Lab, Thermal Sci & Mat Branch, Wright Patterson AFB, OH 45433 USA.
EM chris.muratore@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 151
TC 60
Z9 64
U1 10
U2 87
PU ANNUAL REVIEWS
PI PALO ALTO
PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA
SN 1531-7331
J9 ANNU REV MATER RES
JI Ann. Rev. Mater. Res.
PY 2009
VL 39
BP 297
EP 324
DI 10.1146/annurev-matsci-082908-145259
PG 28
WC Materials Science, Multidisciplinary
SC Materials Science
GA 498ED
UT WOS:000270118900014
ER
PT S
AU Uchic, MD
Shade, PA
Dimiduk, DM
AF Uchic, Michael D.
Shade, Paul A.
Dimiduk, Dennis M.
TI Plasticity of Micrometer-Scale Single Crystals in Compression
SO ANNUAL REVIEW OF MATERIALS RESEARCH
SE Annual Review of Materials Research
LA English
DT Review; Book Chapter
DE size effects; microcompression testing; experimental techniques;
discrete dislocation simulations; flow intermittency; strength
ID DISCRETE DISLOCATION PLASTICITY; MECHANICAL-PROPERTIES; UNIAXIAL
COMPRESSION; MICRON-SCALE; NICKEL MICROCRYSTALS; DYNAMICS SIMULATIONS;
SIZE DEPENDENCE; METALLIC-GLASS; STRAIN BURSTS; SAMPLE-SIZE
AB This review examines the recent literature that has focused on uniaxial compression experiments of single crystals at the micrometer scale. Collectively, the studies discovered new regimes of plastic flow that are size-scale dependent and that occur in the absence of strong strain gradients. However, the quantitative comparison of the flow curves between independent studies is hampered by differences in the particular implementations of the testing methodology Modeling of microcompression experiments using 3-D discrete dislocation simulations has provided valuable insight into the mechanisms that control plastic flow in FCC metals. These efforts identified the importance of the initial dislocation density and distribution of mobile dislocation segments, the influence of free surfaces oil that distribution, as well as altered multiplication and hardening responses due to the finite source statistics. Microcrystal experiments also provide a new pathway to characterize the global system dynamics of dislocation ensembles and associated stochastic processes.
C1 [Uchic, Michael D.; Dimiduk, Dennis M.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Shade, Paul A.] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
RP Uchic, MD (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM michael.uchic@wpafb.af.mil; ms_shade@matsceng.ohio-state.edu;
dennis.dimiduk@wpafb.af.mil
RI Shade, Paul/H-6459-2011
FU Air Force Research Laboratory (AFRL); Air Force Office of Scientific
Research; Defense Advanced Research Projects Agency; AFRL/RX Accelerated
Materials Development by Computation Program [F33615-01-2-5225]
FX The authors have been supported by the Air Force Research Laboratory
(AFRL), Air Force Office of Scientific Research, and the Defense
Advanced Research Projects Agency. P.A.S. also acknowledges support from
the AFRL/RX Accelerated Materials Development by Computation Program,
contract #F33615-01-2-5225. The authors also thank Triplicine
Parthasarathy, Satish Rao, and Chris Woodward for their contributions in
preparing this manuscript.
NR 85
TC 292
Z9 294
U1 9
U2 123
PU ANNUAL REVIEWS
PI PALO ALTO
PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA
SN 1531-7331
BN 978-0-8243-1739-3
J9 ANNU REV MATER RES
JI Ann. Rev. Mater. Res.
PY 2009
VL 39
BP 361
EP 386
DI 10.1146/annurev-matsci-082908-145422
PG 26
WC Materials Science, Multidisciplinary
SC Materials Science
GA 498ED
UT WOS:000270118900016
ER
PT S
AU Eliason, JL
Rasmussen, TE
AF Eliason, Jonathan L.
Rasmussen, Todd E.
BE Upchurch, GR
Criado, E
TI Complications After Endovascular Ruptured Abdominal Aortic Aneurysm
Repair
SO AORTIC ANEURYSMS: PATHOGENESIS AND TREATMENT
SE Contemporary Cardiology
LA English
DT Article; Book Chapter
DE EVAR complications; Ruptured AAA repair; Perioperative morbidity;
endoleak; colonic ischemia; ACS; Postimplant syndrome; Graft thrombosis
ID SINGLE-CENTER EXPERIENCE; US MULTICENTER TRIAL; COMPARTMENT SYNDROME;
OPEN SURGERY; STENT-GRAFT; GASTROINTESTINAL FISTULA; NONABSORBABLE MESH;
FEASIBILITY; CONVERSION; ENDOGRAFT
AB Abdominal aortic aneurysm (AAA) rupture is an event with very high associated morbidity and mortality. Perioperative mortality rates in the United States for open repair of ruptured AAA have averaged around 45% since the late 1980s. Although elective aneurysm repair is four to five times more common than emergent repair, and despite aggressive programs to screen at-risk populations, the incidence of ruptured AAA continues to increase. There is a great need for improvement in early aneurysm detection, which could lead to improved outcomes. However, even with improved methods of detection, due to patient-related factors, a sizeable number of patients with AAA can be anticipated to remain undiagnosed. Improved outcomes with respect to repair of ruptured AAA are therefore vital. Endovascular aneurysm repair (EVAR) has steadily gained in popularity since the first report of its successful application to human patients in 1991 by Parodi et al. Indeed, recent estimates in the United States suggest that elective EVAR is now utilized more commonly than open AAA repair. Because randomized controlled trials (RCTs) have shown perioperative morbidity and mortality advantages for EVAR over open AAA repair in the elective setting, there have been many proponents of using EVAR preferentially for aneurysm patients with the highest mortality, those with rupture. In fact, reports of using EVAR for ruptured AAA can be found in the literature as early as 1994. This chapter will provide an overview of the complications specifically associated with using EVAR for ruptured AAAs. Complications will be categorized into two groups, those that occur in the perioperative setting (early) and those that occur thereafter (late).
C1 [Eliason, Jonathan L.] Univ Michigan Hlth Syst, Dept Surg, Vasc Surg Sect, Ann Arbor, MI 48109 USA.
[Rasmussen, Todd E.] USAF, Med Ctr, San Antonio Mil Vasc Surg Serv, San Antonio, TX USA.
RP Eliason, JL (reprint author), Univ Michigan Hlth Syst, Dept Surg, Vasc Surg Sect, Ann Arbor, MI 48109 USA.
NR 48
TC 1
Z9 1
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DR, STE 208, TOTOWA, NJ 07512-1165 USA
SN 1191-7601
BN 978-1-60327-204-9
J9 CONTEMP CARDIOL
JI Contemp. Cardiol.
PY 2009
BP 207
EP 216
DI 10.1007/978-1-60327-204-9_14
D2 10.1007/978-1-60327-204-9
PG 10
WC Cardiac & Cardiovascular Systems; Surgery
SC Cardiovascular System & Cardiology; Surgery
GA BLZ06
UT WOS:000271475400016
ER
PT B
AU Massman, JP
Havrilla, MJ
Whites, KW
AF Massman, Jeffrey P.
Havrilla, Michael J.
Whites, Keith W.
GP IEEE
TI Adapting Sheet Impedance for Electromagnetic Compatibility
SO APMC: 2009 ASIA PACIFIC MICROWAVE CONFERENCE, VOLS 1-5
LA English
DT Proceedings Paper
CT Asia Pacific Microwave Conference 2009
CY DEC 07-10, 2009
CL Singapore, SINGAPORE
DE Impedance Sheet; R-card; EMC/EMI; Scattering
ID THIN STRIPS; SCATTERING
AB The ability to manipulate a complex impedance sheet about a cylinder of arbitrary diameter to control the overall scattering characteristics at particular angles for shielding or scattering applications is presented. It is shown that with the capability to readily control both the real and imaginary components of a percolated lossy film's effective impedance, specific impedance distributions can be obtained to effectively direct the overall nulls in the bistatic scattering pattern. The exact approach only requires negligible truncation error of the matrix solution and can be applied to cylinders of arbitrary size.
C1 [Massman, Jeffrey P.; Havrilla, Michael J.] USAF, Dept Elect & Comp Engn, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Whites, Keith W.] South Dakota Sch Mines & Technol, Lab Appl Electromagnet & Commun, Rapid City, SD 57701 USA.
RP Massman, JP (reprint author), USAF, Dept Elect & Comp Engn, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jeffrey.massman@afit.edu; michael.havrilla@afit.edu; whites@sdsmt.edu
NR 13
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2801-4
PY 2009
BP 956
EP +
DI 10.1109/APMC.2009.5384331
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPT94
UT WOS:000279924300243
ER
PT S
AU Roberts, CG
Semiatin, SL
Rollett, AD
AF Roberts, C. G.
Semiatin, S. L.
Rollett, A. D.
BE Rollett, AD
TI TWO-PHASE MICROSTRUCTURE GENERATION IN 3D BASED ON 2D SECTIONS OF A
NICKEL ALLOY
SO APPLICATIONS OF TEXTURE ANALYSIS
SE Ceramic Transactions
LA English
DT Proceedings Paper
CT 15th International Conference on Textures of Materials
CY JUN 01-06, 2008
CL Pittsburgh, PA
SP Natl Sci Fdn, Air Force Off Sci Res, Alcoa Technical Ctr
ID ABNORMAL GRAIN-GROWTH; SUPERALLOY; SIMULATION; EVOLUTION
AB A series of new and existing techniques have been developed to generate a three-dimensional microstructure based on geometric and texture characteristics of the primary phase and secondary phase (i.e. carbides) of a nickel alloy, Waspaloy. Each technique is addressed to describe its advantages and proposed modifications to improve the representations of specific features. A Potts-based Monte Carlo grain growth model and Ellipsoid Packing/Cellular Automaton approach were compared to determine which method could construct a grain structure with size and shape distributions that match the experimental distributions. Using the experimental grain orientation distribution (ODF) and misorientation distribution (MDF) as input, an orientation assignment algorithm generated the digital texture distributions. The low volume fraction of (similar to 0.2%) secondary phase particles was inserted onto grain boundaries and grain interiors using an injection technique. The MC grain growth model produced grains with equiaxed morphologies and a lognormal grain size distribution while the orientation assignment algorithm produced orientation and misorientation distributions nearly identical to the nickel alloy. Particle placement on grain boundaries was consistent with the experimental particle-associated misorientation distribution (PMDF); that is, the "PMDF suggests a non-random correlation with grain boundary type (disorientation angle) and was reproduced in the simulation microstructure. The agreement between the digital and experimental features indicates that the techniques can be applied to generate a statistically representative two-phase microstructure.
C1 [Roberts, C. G.; Rollett, A. D.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
[Semiatin, S. L.] AF Res Lab, Materials & Manufacturing Directorate, Wright Patterson AFB, OH 45433 USA.
RP Roberts, CG (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
RI SEMIATIN, SHELDON/E-7264-2017
FU Air Force Initiative "Science and 'Technology Workforce for the 21st
Century" (STW-21) [F33615-01-2-5225]; Air Force Office of Scientific
Research; MRSEC under NSF [DMR-0.520425]
FX The authors would like to acknowledge the individuals who contributed to
the development of the programs within the Microstructure Builder
software package. This work was supported by the Air Force Initiative
"Science and 'Technology Workforce for the 21st Century" (STW-21).
Contract F33615-01-2-5225. managed jointly by the Air Force Office of
Scientific Research. the Materials and Manufacturing Directorate ofthe
Air Force Research Laboratory (AFFU). and the Ohio State
University. Use of facilities supported by the MRSEC under NSF grant
number DMR-0.520425 is also gratefully acknowledged.
NR 21
TC 0
Z9 0
U1 0
U2 1
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 1042-1122
BN 978-0-470-40835-3
J9 CERAM TRANS
PY 2009
VL 201
BP 771
EP +
PG 3
WC Materials Science, Ceramics; Materials Science, Multidisciplinary;
Materials Science, Characterization & Testing
SC Materials Science
GA BTL61
UT WOS:000287220000081
ER
PT J
AU Fickus, M
Mixon, DG
AF Fickus, Matthew
Mixon, Dustin G.
TI Isotropic moments over integer lattices
SO APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS
LA English
DT Article
DE Isotropic; Moments; Discrete; Images; Rotations; Dilations; Edges
ID EDGE-DETECTION; IMAGES; INTERPOLATION
AB Many modern edge and corner detection algorithms use moment transforms. which convolve images with tensor-valued filters, namely the product of a window function with a monomial. Over continuous domains. one may easily show that such transforms are isotropic. We generalize these continuous results to digital images. that is, to functions over the canonical integer lattice in a finite-dimensional real space. In particular, we first introduce a mathematically well-behaved method for the dilation and rotation of digital images, and then show these operations commute with discrete moment transforms in a manner consistent with the continuous results. Published by Elsevier Inc.
C1 [Fickus, Matthew] USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Mixon, Dustin G.] USAF, Radio Frequency Radiat Branch, Bioeffects Div, Human Effectiveness Directorate,Res Lab, Brooks City Base, TX 78235 USA.
RP Fickus, M (reprint author), USAF, Inst Technol, Dept Math & Stat, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM matthew.fickus@afit.edu
NR 12
TC 2
Z9 2
U1 1
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1063-5203
J9 APPL COMPUT HARMON A
JI Appl. Comput. Harmon. Anal.
PD JAN
PY 2009
VL 26
IS 1
BP 77
EP 96
DI 10.1016/j.acha.2008.02.004
PG 20
WC Mathematics, Applied; Physics, Mathematical
SC Mathematics; Physics
GA 384VS
UT WOS:000261772900005
ER
PT J
AU Yuan, X
Caraballo, E
Little, J
Debiasi, M
Serrani, A
Ozbay, H
Myatt, JH
Samimy, M
AF Yuan, X.
Caraballo, E.
Little, J.
Debiasi, M.
Serrani, A.
Oezbay, H.
Myatt, J. H.
Samimy, M.
TI FEEDBACK CONTROL DESIGN FOR SUBSONIC CAVITY FLOWS
SO APPLIED AND COMPUTATIONAL MATHEMATICS
LA English
DT Article
DE Subsonic flows; cavity flow resonance; mathematical modeling; feedback
control
ID PROPER ORTHOGONAL DECOMPOSITION; COMPRESSIBLE FLOW; MODELS; OSCILLATIONS
AB A benchmark problem in active aerodynamic flow control, suppression of strong pressure oscillations induced by flow over a shallow cavity, is addressed in this paper. Proper orthogonal decomposition and Galerkin projection techniques are used to obtain a reducedorder model of the flow dynamics from experimental data. The model is made amenable to control design by means of a control separation technique, which makes the control input appear explicitly in the equations. A prediction model based on quadratic stochastic estimation correlates flow field data with surface pressure measurements, so that the latter can be used to reconstruct the state of the model in real time. The focus of this paper is on the controller design and implementation. A linear-quadratic optimal controller is designed on the basis of the reduced-order model to suppress the cavity flow resonance. To account for the limitation on the magnitude of the control signal imposed by the actuator, the control action is modified by a scaling factor, which plays the role of a bifurcation parameter for the closed-loop system. Experimental results, in qualitative agreement with the theoretical analysis, show that the controller achieves a significant attenuation of the resonant tone with a redistribution of the energy into other frequencies, and exhibits a certain degree of robustness when operating in off-design conditions.
C1 [Yuan, X.; Serrani, A.] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
[Yuan, X.] Int Truck & Engine Corp, Melrose Pk, IL USA.
[Caraballo, E.; Little, J.; Debiasi, M.; Samimy, M.] Ohio State Univ, Dept Mech Engn, Gas Dynam & Turbulence Lab, Columbus, OH 45235 USA.
[Debiasi, M.] Natl Univ Singapore, Temasek Labs, Expt Aerosci Grp, Singapore, Singapore.
[Oezbay, H.] Bilkent Univ, Dept Elect & Elect Engn, TR-06533 Ankara, Turkey.
[Myatt, J. H.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Yuan, X (reprint author), Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
RI Little, Jesse/J-7808-2012; Ozbay, Hitay/O-5299-2014; Ozbay,
Hitay/S-3885-2016
OI Ozbay, Hitay/0000-0003-1134-0679
NR 48
TC 2
Z9 2
U1 0
U2 3
PU MINISTRY COMMUNICATIONS & HIGH TECHNOLOGIES REPUBLIC AZERBAIJAN
PI BAKU
PA BAKU STATE UNIV, INST APPLIED MATHEMATICS, Z KHALILOV STR 23, BAKU, AZ
1148, AZERBAIJAN
SN 1683-3511
EI 1683-6154
J9 APPL COMPUT MATH-BAK
JI Appl. Comput. Math.
PY 2009
VL 8
IS 1
BP 70
EP 91
PG 22
WC Mathematics, Applied
SC Mathematics
GA 462VI
UT WOS:000267384700006
ER
PT J
AU Burton, AC
Carson, KS
Chilton, SM
Hutchinson, WG
AF Burton, Anthony C.
Carson, Katherine S.
Chilton, Susan M.
Hutchinson, W. George
TI Why do people non-demand reveal in hypothetical double referenda for
public goods?
SO APPLIED ECONOMICS
LA English
DT Article
ID DICHOTOMOUS CHOICE; CONTINGENT VALUATION; EFFICIENCY; BIAS
AB Hypothetical contingent valuation surveys used to elicit values for environmental and other public goods often employ variants of the referendum mechanism due to the cognitive simplicity and familiarity of respondents with this voting format. One variant, the double referendum mechanism, requires respondents to state twice how they would vote for a given policy proposal given their cost of the good. Data from these surveys often exhibit anomalies inconsistent with standard economic models of consumer preferences. There are a number of published explanations for these anomalies, mostly focusing on problems with the second vote. This article investigates which aspects of the hypothetical task affect the degree of nondemand revelation and takes an individual-based approach to identifying people most likely to non-demand reveal. A clear profile emerges from our model of a person who faces a negative surplus i.e. a net loss in the second vote and invokes non self-interested, non financial motivations during the decision process.
C1 [Carson, Katherine S.] USAF Acad, Dept Econ & Geog, HQ USAFA DFEG, Colorado Springs, CO 80840 USA.
Newcastle Univ, Sch Business, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
[Hutchinson, W. George] Queens Univ Belfast, Gibson Inst Land Food & Environm, Belfast BT9 5PX, Antrim, North Ireland.
EM s.m.chilton@ncl.ac.uk
OI Silz Carson, Katherine/0000-0002-2446-1368; Hutchinson, W
George/0000-0003-0028-7868
NR 14
TC 1
Z9 1
U1 0
U2 4
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0003-6846
J9 APPL ECON
JI Appl. Econ.
PY 2009
VL 41
IS 27
BP 3561
EP 3569
AR PII 789515188
DI 10.1080/00036840701537802
PG 9
WC Economics
SC Business & Economics
GA 521AL
UT WOS:000271891100011
ER
PT J
AU Matson, CL
Borelli, K
Jefferies, S
Beckner, CC
Hege, EK
Lloyd-Hart, M
AF Matson, Charles L.
Borelli, Kathy
Jefferies, Stuart
Beckner, Charles C., Jr.
Hege, E. Keith
Lloyd-Hart, Michael
TI Fast and optimal multiframe blind deconvolution algorithm for
high-resolution ground-based imaging of space objects
SO APPLIED OPTICS
LA English
DT Article
ID CRAMER-RAO ANALYSIS; ATMOSPHERIC-TURBULENCE; STAR IMAGES;
SUPERRESOLUTION; PARAMETER; SPECKLE; PHASE; RECONSTRUCTION; SYSTEM
AB We report a multiframe blind deconvolution algorithm that we have developed for imaging through the atmosphere. The algorithm has been parallelized to a significant degree for execution on high-performance computers, with an emphasis on distributed-memory systems so that it can be hosted on commodity clusters. As a result, image restorations can be obtained in seconds to minutes. We have compared and quantified the quality of its image restorations relative to the associated Cramer-Rao lower bounds (when they can be calculated). We describe the algorithm and its parallelization in detail, demonstrate the scalability of its parallelization across distributed-memory computer nodes, discuss the results of comparing sample variances of its output to the associated Cramer-Rao lower bounds, and present image restorations obtained by using data collected with ground-based telescopes. (C) 2008 Optical Society of America
C1 [Matson, Charles L.; Beckner, Charles C., Jr.] USAF, Res Lab, Kirtland AFB, NM 87117 USA.
[Borelli, Kathy] KJS Consulting, Haiku, HI 96708 USA.
[Jefferies, Stuart] Univ Hawaii, Inst Astron, Kula, HI 96790 USA.
[Hege, E. Keith] MKS Imaging Technol LLC, Tucson, AZ 85718 USA.
[Hege, E. Keith; Lloyd-Hart, Michael] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
RP Matson, CL (reprint author), USAF, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
FU Air Force Research Laboratory's Directed Energy Directorate; Air Force
Office of Scientific Research; High-Performance Computing Modernization
Office
FX The authors thank the Air Force Research Laboratory's Directed Energy
Directorate, the Air Force Office of Scientific Research, and the
High-Performance Computing Modernization Office for their financial
support that made this work possible.
NR 55
TC 19
Z9 21
U1 0
U2 5
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 JAN 1
PY 2009
VL 48
IS 1
BP A75
EP A92
DI 10.1364/AO.48.000A75
PG 18
WC Optics
SC Optics
GA 398OG
UT WOS:000262740800011
PM 19107159
ER
PT J
AU Vorontsov, M
Riker, J
Carhart, G
Gudimetla, VSR
Beresnev, L
Weyrauch, T
Roberts, LC
AF Vorontsov, Mikhail
Riker, Jim
Carhart, Gary
Gudimetla, V. S. Rao
Beresnev, Leonid
Weyrauch, Thomas
Roberts, Lewis C., Jr.
TI Deep turbulence effects compensation experiments with a cascaded
adaptive optics system using a 3.63 m telescope
SO APPLIED OPTICS
LA English
DT Article
ID PHASE-DISTORTION CORRECTION; RECONSTRUCTION; ANISOPLANATISM;
OPTIMIZATION
AB Compensation of extended (deep) turbulence effects is one of the most challenging problems in adaptive optics (AO). In the AO approach described, the deep turbulence wave propagation regime was achieved by imaging stars at low elevation angles when image quality improvement with conventional AO was poor. These experiments were conducted at the U.S. Air Force Maui Optical and Supercomputing Site (AMOS) by using the 3.63 in telescope located on Haleakala, Maui. To enhance compensation performance we used a cascaded AO system composed of a conventional AO system based on a Shack-Hartmann wavefront sensor and a deformable mirror with 941 actuators, and an AO system based on stochastic parallel gradient descent optimization with four deformable mirrors (75 control channels). This first-time field demonstration of a cascaded AO system achieved considerably improved performance of wavefront phase aberration compensation. Image quality was improved in a repeatable way in the presence of stressing atmospheric conditions obtained by using stars at elevation angles as low as 15 degrees. (C)2008 Optical Society of America
C1 [Vorontsov, Mikhail; Carhart, Gary; Beresnev, Leonid] USA, Intelligent Opt Lab, Computat & Informat Sci Directorate, Res Lab, Adelphi, MD 20783 USA.
[Vorontsov, Mikhail; Weyrauch, Thomas] Univ Maryland, Syst Res Inst, Intelligent Opt Lab, College Pk, MD 20742 USA.
[Riker, Jim] USAF, Res Lab, Kirtland AFB, NM 87117 USA.
[Gudimetla, V. S. Rao] USAF, Res Lab, Kehie, HI 96753 USA.
[Roberts, Lewis C., Jr.] Boeing Co, Kihei, HI 96753 USA.
RP Vorontsov, M (reprint author), USA, Intelligent Opt Lab, Computat & Informat Sci Directorate, Res Lab, Adelphi, MD 20783 USA.
EM mvorontsov@arl.army.mil
FU U.S. Joint Technology Office [JTO-07-SA-0238]; U.S. Army Research
Laboratory and the University of Maryland, College Park
[W911NF-06-2-0009]
FX The authors are grateful to W. Bradford for helpful discussions and K.
Aschenbach for technical support. This work was supported by the U.S.
Joint Technology Office under contract JTO-07-S&A-0238 and by the
Cooperative Agreement W911NF-06-2-0009 between the U.S. Army Research
Laboratory and the University of Maryland, College Park.
NR 22
TC 16
Z9 20
U1 2
U2 7
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 JAN 1
PY 2009
VL 48
IS 1
BP A47
EP A57
DI 10.1364/AO.48.000A47
PG 11
WC Optics
SC Optics
GA 398OG
UT WOS:000262740800007
PM 19107154
ER
PT J
AU Yu, ZN
Tan, LS
Fossum, E
AF Yu, Zhenning
Tan, Loon-Seng
Fossum, Eric
TI Aryl ether synthesis via Ullmann coupling in non-polar solvents: effect
of ligand, counterion, and base
SO ARKIVOC
LA English
DT Article
DE Ullmann Coupling; O-arylation; aryl ether synthesis; copper (I) catalyst
ID O BOND FORMATION; DIARYL ETHERS; C-O; CATALYZED FORMATION; COPPER;
HALIDES; PHENOLS; ARYLATION; OXYGEN
AB An Ullmann coupling route to diaryl ethers, for use in non-polar solvents, employing 5 mol % of an air stable Cu (I) catalyst, CuIPPh(3), has been explored. The O-arylation process occurred smoothly in non-polar solvents, toluene or xylene, with the inexpensive base K(2)CO(3). The highest yields were achieved with electron poor aryl bromides and electron rich phenols. The reactions were highly selective toward bromide over chloride in multiple halogenated aromatics.
C1 [Yu, Zhenning; Fossum, Eric] Wright State Univ, Dept Chem, Dayton, OH 45435 USA.
[Tan, Loon-Seng] USAF, Nanostruct & Biol Mat Branch, Mat & Mfg Directorate, AFRL RXBN,Res Lab, Dayton, OH 45433 USA.
RP Fossum, E (reprint author), Wright State Univ, Dept Chem, 3640 Colonel Glenn Hwy, Dayton, OH 45435 USA.
EM eric.fossum@wright.edu
RI Yu, Zhenning/A-2011-2010;
OI Tan, Loon-Seng/0000-0002-2134-9290
FU Air Force Materials & Manufacturing Directorate and Air Force Office of
Scientific Research [FA8650-05-D-5807]
FX The authors acknowledge funding support from the Air Force Materials &
Manufacturing Directorate and Air Force Office of Scientific Research
under the Contract FA8650-05-D-5807, Delivery Order 0009.
NR 32
TC 5
Z9 5
U1 0
U2 4
PU ARKAT USA INC
PI GAINESVILLE
PA C/O ALAN R KATRITZKY, UNIV FLORIDA, DEPT CHEMISTRY, PO BOX 117200,
GAINESVILLE, FL 32611 USA
SN 1551-7004
J9 ARKIVOC
JI Arkivoc
PY 2009
BP 255
EP 265
PN 14
PG 11
WC Chemistry, Organic
SC Chemistry
GA 599LG
UT WOS:000277913400023
ER
PT J
AU Cliver, EW
Ling, AG
AF Cliver, E. W.
Ling, A. G.
TI LOW-FREQUENCY TYPE III BURSTS AND SOLAR ENERGETIC PARTICLE EVENTS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: activity; Sun: coronal mass ejections (CMEs); Sun: flares; Sun:
particle emission; Sun: radio radiation
ID CORONAL MASS EJECTIONS; ADVANCED COMPOSITION EXPLORER; ELECTRON EVENTS;
RADIO-BURSTS; 1 AU; INTERPLANETARY MEDIUM; ISOTOPE SPECTROMETER; WIND
SPACECRAFT; CHARGE STATES; PROTON EVENTS
AB We compare the similar to 1 MHz type III bursts of flares associated with samples of "impulsive" and "gradual" solar energetic particle (SEP) events from cycle 23. While large gradual SEP events had much higher > 30 MeV proton intensities, the median-integrated intensities, peak intensities, and durations of the two groups of radio bursts were comparable. Thus, the median "proton yield" (peak > 30 MeV proton intensity of an SEP event divided by its associated integrated similar to 1 MHz intensity) of type III bursts associated with gradual SEP events was similar to 280 times larger than that for impulsive SEP events. A similar yield difference of similar to 250 was observed for 4.4 MeV electron events. Only for extrapolated electron energies similar to 5 keV, corresponding to the energy of the electrons that excite type III emission, does the median yield converge to the same value for both groups of events. The time profiles of similar to 1 MHz bursts associated with impulsive SEP events are characteristically shorter and simpler than those associated with the gradual SEP events, reflecting the development of the second stage of radio emission in large eruptive flares. The gradual SEP events were highly associated (96%) with decametric-hectometric (DH) type II bursts versus only a 5% association rate for the impulsive events. Large favorably located similar to 1 MHz type III bursts with associated DH type IIs had an similar to 60% association rate with large (>= 1 pfu) > 30 MeV SEP events versus similar to 5% for similar to 1 MHz bursts without accompanying DH II emission. These results are interpreted in terms of two distinct types of particle acceleration at the Sun, a flare-resident process that produces relatively few > 30 MeV protons and similar to 4 MeV electrons in space and a shock process that dominates the large gradual proton events.
C1 [Cliver, E. W.] USAF, Res Lab, Res Vehicles Directorate, Hanscom AFB, MA 01731 USA.
[Ling, A. G.] Atmospher Environm Res Inc, Lexington, MA 02421 USA.
RP Cliver, EW (reprint author), USAF, Res Lab, Res Vehicles Directorate, Hanscom AFB, MA 01731 USA.
FU AFRL [FA8718-05-C-0036]
FX We thank D. Reames and A. Tylka for comments on a draft of this paper
and the referee for helpful comments. A.G.L. was supported by AFRL
contract FA8718-05-C-0036.
NR 59
TC 21
Z9 21
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 1
PY 2009
VL 690
IS 1
BP 598
EP 609
DI 10.1088/0004-637X/690/1/598
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398IU
UT WOS:000262726600049
ER
PT J
AU Ragot, BR
AF Ragot, B. R.
TI DISPERSAL OF MAGNETIC FIELD LINES: NONLINEAR STATISTICAL THEORY AND
APPLICATION TO THE SLOW SOLAR WIND
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmic rays; magnetic fields; plasmas; turbulence; waves
ID PARTICLE-ACCELERATION; ANOMALOUS TRANSPORT; KOLMOGOROV ENTROPY;
TURBULENCE; FLUCTUATIONS; DIFFUSION; DISPLACEMENT; SEPARATION;
SCATTERING; SPECTRA
AB The recent result that pairs of nearby magnetic field lines diverge (converge) subexponentially rather than exponentially in a turbulent magnetized plasma is extended to a broad range of initial field-line separations. The substantial twist, Delta theta, or rotation of the magnetic field lines relative to each other, simultaneous with the field-line divergence, is also demonstrated in a more general framework. Two main regimes of field-line dispersal emerge from the more general calculation of this paper. For the longer field-line separation distances rho, for which the turbulence spectral index exceeds -1 near 3 rho(-1), the field-line spreading <(Delta rho)(2)> and mean-square cross-field displacement <(Delta r)(2)> have very similar behaviors, and both rho and Delta r have Gaussian statistics. For shorter rho, the statistics of rho become log-normal. In that regime of more moderate rho, magnetic field lines perform random walks relative to each other in the (theta, ln rho) space that become diffusive on the field-aligned distance Delta z of a few zeta(B) max {min(zeta(II), k(II)(-1) ), min[zeta(rho), (3 xi)(-1) rho], k(II) being the wavenumber where the three-dimensional turbulence spectrum becomes steeper than (k(parallel to)(2) +xi(2)k(perpendicular to)(2))(-1), xi the anisotropy parameter of the turbulence, and zeta(II) and zeta(rho) the nonlinear scales associated with k(II)(-1) and rho, respectively. In the nonlinear regime of field-line dispersal where zeta(II) or zeta(rho) determines zeta(B), the decorrelation of the field-lines' relative random walk is driven by Delta r. Application to the slow solar wind at 1AU shows that the mixing of field-line bundles starts beyond Delta z similar to 0.01-0.1 AU and occurs from the smallest transversal scales up. Another major conclusion is that the closer the magnetic field lines, the faster they rotate relative to each other.
C1 USAF, Res Lab, RVBXS, Bedford, MA 01731 USA.
RP Ragot, BR (reprint author), USAF, Res Lab, RVBXS, 29 Randolph Rd, Bedford, MA 01731 USA.
NR 41
TC 8
Z9 8
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 1
PY 2009
VL 690
IS 1
BP 619
EP 643
DI 10.1088/0004-637X/690/1/619
PG 25
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398IU
UT WOS:000262726600051
ER
PT S
AU Mudaliar, S
AF Mudaliar, Saba
BE Korotkova, O
TI Remarks on the Polarimetric Radiative Transfer of the Atmosphere
involving Ground Reflections
SO ATMOSPHERIC PROPAGATION OF ELECTROMAGNETIC WAVES III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Atmospheric Propagation of Electromagnetic Waves III
CY JAN 26-27, 2009
CL San Jose, CA
SP SPIE
DE random media; rough surfaces; radiative transfer; multilayer; wave
approach
ID SURFACE-ROUGHNESS; SCATTERING; COHERENCE; RADIOMETRY; INTERFACE;
SYSTEMS; MEDIA; FIELD
AB The radiative transfer (RT) approach is widely used for studying scattering from layered random media with rough interfaces. Although it has been successful in several applications such as remote sensing of atmosphere it is well known that this approach involves certain approximations. In this paper these assumptions and approximations are reexamined and explained. To enable this a statistical approach is employed to this problem and the governing equations for the first and second moments of the wave fields are derived. A transition is hence made to arrive at a system of equations corresponding to that of the RT approach. It is thus found that more conditions are implicitly involved in the RT approach than generally believed to be necessary.
C1 USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
RP Mudaliar, S (reprint author), USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
EM saba.mudaliar@hanscom.af.mil
NR 24
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7446-9
J9 PROC SPIE
PY 2009
VL 7200
AR 720007
DI 10.1117/12.811915
PG 12
WC Meteorology & Atmospheric Sciences; Optics
SC Meteorology & Atmospheric Sciences; Optics
GA BSH08
UT WOS:000284395300005
ER
PT S
AU Schmidt, JD
Louthain, JA
AF Schmidt, Jason D.
Louthain, James A.
BE Korotkova, O
TI Integrated approach to free-space optical communication
SO ATMOSPHERIC PROPAGATION OF ELECTROMAGNETIC WAVES III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Atmospheric Propagation of Electromagnetic Waves III
CY JAN 26-27, 2009
CL San Jose, CA
SP SPIE
DE free-space optical communication; atmospheric turbulence; adaptive
threshold; spatial diversity; multiple-transmitters
ID WEAK ATMOSPHERIC-TURBULENCE; SCREEN GENERATOR; ADAPTIVE OPTICS; PHASE;
ANISOPLANATISM; BEAMS
AB Lasers offer tremendous advantages over RF communication systems in bandwidth and security. Atmospheric turbulence causes severe received power variations and high bit error rates (BERs) in airborne laser communication. If two or more laser beams are separated sufficiently, they can effectively "average out" the effects of the turbulence. This requisite separation distance is derived for multiple geometries, turbulence conditions, and turbulence effects. Integrating multiple techniques into a system alleviates the deleterious effects of turbulence without bulky adaptive optics systems. Wave optics simulations show multiple transmitters, receiver and transmitter trackers, and adaptive thresholding significantly reduce BER (by over 10,000 times).
C1 [Schmidt, Jason D.; Louthain, James A.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Louthain, JA (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jason.schmidt@afit.edu; james.louthain@afit.edu
NR 27
TC 0
Z9 0
U1 2
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7446-9
J9 PROC SPIE
PY 2009
VL 7200
AR 72000I
DI 10.1117/12.812153
PG 15
WC Meteorology & Atmospheric Sciences; Optics
SC Meteorology & Atmospheric Sciences; Optics
GA BSH08
UT WOS:000284395300012
ER
PT J
AU Lightfoot, MDA
AF Lightfoot, Malissa D. A.
TI FUNDAMENTAL CLASSIFICATION OF ATOMIZATION PROCESSES
SO ATOMIZATION AND SPRAYS
LA English
DT Review
ID 2-PHASE MIXING LAYERS; VISCOUS-LIQUID SHEET; THIN POLYMER-FILMS; MEAN
DROPLET SIZE; WAVY WALL COLUMN; NUMERICAL-SIMULATION; INTERFACIAL SHEAR;
FLASH ATOMIZATION; PRIMARY BREAKUP; ANNULAR REGIME
AB A device-independent framework to classify and describe atomization is developed. This framework divides atomizers into various classes based on the geometry of the liquid prior to breakup. These classes are general enough to encompass a wide array of existent atomizers while still describing important aspects of the atomization physics. Across these classes, a limited number of atomization regimes exist that are grouped based on the rate of the atomization processes (disturbance growth and breakdown). Existent classifications are reconsidered to show how they fit into the current construction of five classes (jet, sheet, film, prompt, and discrete parcel) and three modes (bulk fluid, mixed, and surface). The new framework also clarifies the underlying physics of the atomization process. This process consists of the initiation and growth of a disturbance, followed by its breakdown. Several categories of disturbance initiation and disturbance breakdown are described, supported by examples from the literature.
C1 USAF, Res Lab, Edwards AFB, CA 93524 USA.
RP Lightfoot, MDA (reprint author), USAF, Res Lab, 10 E Saturn Blvd, Edwards AFB, CA 93524 USA.
EM malissa.lightfoot@edwards.af.mil
NR 141
TC 3
Z9 3
U1 1
U2 18
PU BEGELL HOUSE INC
PI REDDING
PA 50 CROSS HIGHWAY, REDDING, CT 06896 USA
SN 1044-5110
J9 ATOMIZATION SPRAY
JI Atom. Sprays
PY 2009
VL 19
IS 11
BP 1065
EP 1104
PG 40
WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering,
Mechanical; Materials Science, Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 551IY
UT WOS:000274202500005
ER
PT J
AU Caldwell, JA
Mallis, MM
Caldwell, JL
Paul, MA
Miller, JC
Neri, DF
AF Caldwell, John A.
Mallis, Melissa M.
Caldwell, J. Lynn
Paul, Michel A.
Miller, James C.
Neri, David F.
CA Aerosp Med Association Fatigue Cou
TI Fatigue Countermeasures in Aviation
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Review
DE alertness; sleep; hypnotics; stimulants; flight time regulations; duty
time regulations; sustained operations
ID HELICOPTER PILOT PERFORMANCE; LONG-HAUL FLIGHTS; DISORDERS CONSENSUS
REPORT; HUMAN CIRCADIAN-RHYTHMS; PHASE RESPONSE CURVE; JET-LAG; SHIFT
WORK; SLEEP-DEPRIVATION; HEALTHY-SUBJECTS; COGNITIVE PERFORMANCE
AB Pilot fatigue is a significant problem in modern aviation operations, largely because of the unpredictable work hours, long duty periods, circadian disruptions, and insufficient sleep that arc, commonplace in both civilan and military flight operations. The full impact of fatigue is often underappreciated, but many of its deleterious effects have long been known. Compared to people who are well-rested, people who are sleep deprived think and move more slowly, make more mistakes, and have memory difficulties. These negative effects may and do lead to aviation errors and accidents. In the 1930s, flight time limitations, suggested lay-over durations, and aircrew sleep recommendations were developed in ail attempt to mitigate aircrew fatigue. Unfortunately, there have heen few changes to aircrew scheduling provisions and flight time limitations Since the time they were first introduced, despite evidence that updates are needed. Although the scientific under landing of fatigue, sleep, shift work, and circadian physiology has advanced significantly over the past several decades, current regulations and industry practices have in large part failed to adequately incorporate the new knowledge. Thus, the problem of pilot fatigue has steadily increased along with fatigue-related concerns oven air safety. Accident statistics, reports from pilots themselves, and operational flight studies all show that fatigue is a growing concern within aviation operations. This position paper reviews the relevant scientific literature, summarizes applicable U.S. civilian and military flight regulations, evaluates various in-flight and pre/postflight fatigue countermeasure, and describe emerging technologies for detecting and countering fatigue. Following the discussion of each major issue, position statements address ways to deal with fatigue in specific contexts with the goal of using current scientific knowledge to update policy and provide tools and technique, for improving air safety.
C1 [Caldwell, John A.] USAF, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
[Mallis, Melissa M.] Inst Behavior Resources Inc, Baltimore, MD USA.
[Caldwell, John A.] Archinoet LLC, Honolulu, HI USA.
[Paul, Michel A.] Def R&D Canada Toronto, Toronto, ON, Canada.
[Miller, James C.] Miller Ergon, San Antonio, TX USA.
[Neri, David F.] Off Naval Res, Arlington, VA 22217 USA.
RP Caldwell, JA (reprint author), USAF, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
EM lynn.caldwell@wpafb.af.mil
OI Miller, James/0000-0002-3897-8376
FU AHFC; Aerospace Medical Association Executive Council
FX The authors wish to thank Dr. Thomas Nesthus, Chair Of the Aerospace
Human Factors Committee (AHFC) for his guidance and Support throughout a
lengthy process. We are also grateful to CAPT Nicholas Davenport for
comments and information regarding U.S. Navy flight duty/rest
regulations and Capt. Barry Reeder for information about corresponding
U.S. Air Force regulations though any errors remain ours. We thank the
members of the AHFC for their comments on an earlier version of the
manuscript, especially Dr. Ronald Hoffman and Dr. David Schroeder as
well as the Aerospace Medical Association Executive Council for its
comments and review, particularly Dr. Russell Rayman, Dr. Guillermo
Salazar, Dr. Estrella Forster, and CA PT Christopher Armstrong.
NR 231
TC 48
Z9 54
U1 7
U2 28
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD JAN
PY 2009
VL 80
IS 1
BP 29
EP 59
DI 10.3357/ASEM.2435.2009
PG 31
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 390XP
UT WOS:000262197300007
PM 19180856
ER
PT J
AU Man, YG
Schwartz, A
Levine, PH
Teal, C
Berg, PE
AF Man, Yan-Gao
Schwartz, Arnold
Levine, Paul H.
Teal, Christine
Berg, Patricia E.
TI BP1, a putative signature marker for inflammatory breast cancer and
tumor aggressiveness
SO CANCER BIOMARKERS
LA English
DT Article
DE BP1; homeobox gene; inflammatory breast cancer; tumor invasion;
metastasis
ID END RESULTS PROGRAM; BETA-GLOBIN GENE; HOMEOBOX GENE; CARCINOMA
INCIDENCE; PROGRESSION; EXPRESSION; SURVIVAL; OVEREXPRESSION;
PROLIFERATION; EPIDEMIOLOGY
AB Our previous studies revealed that beta protein 1 (BP1) was barely detectable in normal human breasts, but was seen in 21%, 46%, and 81% of hyperplastic, in situ, and invasive breast lesions, respectively. Our current study attempted to assess BP1 expression in inflammatory breast cancer (IBC), a very aggressive subtype of breast cancers characterized by extensive lympho-vascular invasion and involvement of dermal lymphatics. Paraffin-embedded tissue sections from 45 cases of IBC ( nine with paired metastatic lymph nodes) and different controls were assayed immunohistochemically for BP1 expression. Positive BP1 immunoreactivities were present in all IBC cases. Strikingly, all cancer cells metastasized to lymph nodes and cells within lymphatic channels were uniformly and strongly immunoreactive to BP1. The percentage of BP1 positive cells and the intensity of BP1 immunostaining in IBC cases were significantly greater than those in non-IBC cases. Our findings suggest that BP1 may possess properties of onco-proteins that promote tumor progression, invasion, and metastasis, representing a putative signature marker for IBC and tumor aggressiveness.
C1 [Man, Yan-Gao] USAF, Dept Gynecol & Breast Pathol, Inst Pathol & Amer Registry Pathol, Washington, DC 20306 USA.
[Man, Yan-Gao] Jilin Univ, Changchun 130023, Jilin, Peoples R China.
[Schwartz, Arnold] George Washington Univ, Med Ctr, Dept Pathol, Washington, DC 20037 USA.
[Levine, Paul H.] George Washington Univ, Med Ctr, Dept Biophys & Stat, Washington, DC 20037 USA.
[Teal, Christine] George Washington Univ, Med Ctr, Dept Surg, Washington, DC 20037 USA.
[Berg, Patricia E.] George Washington Univ, Med Ctr, Dept Biochem & Mol Biol, Washington, DC 20037 USA.
RP Man, YG (reprint author), USAF, Dept Gynecol & Breast Pathol, Inst Pathol & Amer Registry Pathol, Washington, DC 20306 USA.
EM man@afip.osd.mil
FU Congressionally Directed Medical Research Programs [DAMD1701-1-0129,
DAMD17-01-1-0130, PC051308, DAMD17-01-1-0244]; Komen Breast Cancer
Foundation [BC-TR0706983]; Ministry of Chinese Science and Technology
Department [2006CB910505]
FX This study was supported in part by grants DAMD1701-1-0129,
DAMD17-01-1-0130, PC051308 (Y.G.M), and DAMD17-01-1-0244 (P.H.L) from
Congressionally Directed Medical Research Programs, grants BC-TR0706983
(Y.G.M.) (P.E.B) from the Susan B. Komen Breast Cancer Foundation, and
grant 2006CB910505 from the Ministry of Chinese Science and Technology
Department (Y.G.M).
NR 30
TC 9
Z9 10
U1 0
U2 1
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1574-0153
J9 CANCER BIOMARK
JI Cancer Biomark.
PY 2009
VL 5
IS 1
BP 9
EP 17
DI 10.3233/CBM-2009-0563
PG 9
WC Oncology
SC Oncology
GA 425CE
UT WOS:000264613800002
PM 19242057
ER
PT S
AU Henley, MV
Burns, DS
Chynwat, V
Moore, W
Plitz, A
Rottmann, SD
Hearn, JD
AF Henley, Michael V.
Burns, Douglas S.
Chynwat, Veeradej
Moore, William
Plitz, Angela
Rottmann, Shawn D.
Hearn, John D.
BE Fountain, AW
Gardner, PJ
TI Modeling the Atmospheric Chemistry of TICs
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING X
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing X
CY APR 14-16, 2009
CL Orlando, FL
SP SPIE
AB An atmospheric chemistry model that describes the behavior and disposition of environmentally hazardous compounds discharged into the atmosphere was coupled with the transport and diffusion model, SCIPUFF.(1) The atmospheric chemistry model was developed by reducing a detailed atmospheric chemistry mechanism to a simple empirical effective degradation rate term (k(eff)) that is a function of important meteorological parameters such as solar flux, temperature, and cloud cover. Empirically derived k(eff) functions that describe the degradation of target toxic industrial chemicals (TICs) were derived by statistically analyzing data generated from the detailed chemistry mechanism run over a wide range of (typical) atmospheric conditions.
To assess and identify areas to improve the developed atmospheric chemistry model, sensitivity and uncertainty analyses were performed to (1) quantify the sensitivity of the model output (TIC concentrations) with respect to changes in the input parameters and (2) improve, where necessary, the quality of the input data based on sensitivity results. The model predictions were evaluated against experimental data. Chamber data were used to remove the complexities of dispersion in the atmosphere.
C1 [Henley, Michael V.] AFRL RXQL, Tyndall AFB, FL USA.
RP Henley, MV (reprint author), AFRL RXQL, Tyndall AFB, FL USA.
NR 5
TC 0
Z9 0
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7570-1
J9 PROC SPIE
PY 2009
VL 7304
AR 73040H
DI 10.1117/12.821924
PG 9
WC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
SC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
GA BVR69
UT WOS:000292557300012
ER
PT S
AU Kiel, JL
Walker, WW
Andrews, CJ
De Los Santos, A
Adams, RN
Buchholz, MW
McBurnett, SD
Fuentes, V
Rizner, KE
Blount, KW
AF Kiel, Johnathan L.
Walker, Wes W.
Andrews, Carrie J.
De Los Santos, Amy
Adams, Roy N.
Buchholz, Matthew W.
McBurnett, Shelly D.
Fuentes, Vladimir
Rizner, Karon E.
Blount, Keith W.
BE Fountain, AW
Gardner, PJ
TI Pathogenic Ecology: Where have all the pathogens gone? Anthrax: A
Classic Case
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING X
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing X
CY APR 14-16, 2009
CL Orlando, FL
SP SPIE
DE anthrax; plants; legumes; curlicue; coiling; nitration
ID BACILLUS-ANTHRACIS; POPULATION-STRUCTURE; CEREUS; THURINGIENSIS;
TRANSDUCTION; BACTERIOPHAGE; PLASMIDS; SYSTEM; GENES; AGENT
AB Pathogenic ecology is the natural relationship to animate and inanimate components of the environment that support the sustainment of a pathogen in the environment or prohibit its sustainment, or their interactions with an introduced pathogen that allow for the establishment of disease in a new environment. The anthrax bacterium in the spore form has been recognized as a highly likely biological warfare or terrorist agent. The purpose of this work was to determine the environmental reservoir of Bacillus anthracis between outbreaks of anthrax and to examine the potential factors influencing the conversion of the Bacillus anthracis from a quiescent state to the disease causing state. Here we provide environmental and laboratory data for the cycling of Bacillus anthracis in plants to reconcile observations that contradict the soil borne hypothesis of anthrax maintenance in the environment.
C1 [Kiel, Johnathan L.; Walker, Wes W.; Andrews, Carrie J.; De Los Santos, Amy; Adams, Roy N.; Buchholz, Matthew W.; Fuentes, Vladimir; Rizner, Karon E.; Blount, Keith W.] USAF, Biosci & Protect Div, Human Effectiveness Directorate, Res Lab, Brooks City Base, TX 78235 USA.
RP Kiel, JL (reprint author), USAF, Biosci & Protect Div, Human Effectiveness Directorate, Res Lab, Brooks City Base, TX 78235 USA.
EM johnathan.kiel@brooks.af.mil
NR 30
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7570-1
J9 PROC SPIE
PY 2009
VL 7304
AR 730402
DI 10.1117/12.821920
PG 9
WC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
SC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
GA BVR69
UT WOS:000292557300002
ER
PT S
AU Moore, EA
Gross, KC
Bowen, SJ
Perram, GP
Chamberland, M
Farley, V
Gagnon, JP
Lagueux, P
Villemaire, A
AF Moore, Elizabeth A.
Gross, Kevin C.
Bowen, Spencer J.
Perram, Glen P.
Chamberland, Martin
Farley, Vincent
Gagnon, Jean-Philippe
Lagueux, Philippe
Villemaire, Andre
BE Fountain, AW
Gardner, PJ
TI Characterizing and overcoming spectral artifacts in imaging
Fourier-transform spectroscopy of turbulent exhaust plumes
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING X
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing X
CY APR 14-16, 2009
CL Orlando, FL
SP SPIE
DE imaging spectroscopy; FTS; jet engine exhaust; turbulence; scene-change
artifacts; source noise
ID EMISSIONS
AB The midwave and shortwave infrared regions of the electromagnetic spectrum contain rich information enabling the characterization of hot, rapid events such as explosions, engine plumes, flares and other combustion events, High-speed sensors are required to analyze the content of such rapidly evolving targets. Cameras with high frame rates and non-imaging aging spectrometers with high data rates are typically used; however the information from these two types of instruments must be later fused to enable characterization of the transient targets. Imaging spectrometers have recently become commercially available for general scientific use, thus enabling simultaneous capture of both spatial and spectral information without co-registration issues. However, their use against rapidly-varying sources has traditionally been considered problematic, for even at moderate spatial and spectral resolutions the time to acquire a single spectrum can be long compared to the timescales associated with combustion events.
This paper demonstrates that imaging Fourier-transform spectroscopy (IFTS) can successfully characterize the turbulent combustion exhaust from a turbojet engine. A Telops Hyper-Cam IFTS collected hyperspectral video from a Turbine Technologies SR-30 turbojet engine with a spectral resolution of delta(v) over tilde = 1 cm(-1) on a 200x64 pixel sub-window at a rate of 0.3 Hz. Scene-change artifacts (SCAs) are present in the spectra; however, the stochastic fluctuations in source intensity translate into high-frequency "noise," Temporal averaging affords a significants reduction of the noise associated with SCAs. Emission from CO and CO(2) are clearly recognized in the averaged spectra, and information about their temperature and relative concentrations is evident.
C1 [Moore, Elizabeth A.; Gross, Kevin C.; Bowen, Spencer J.; Perram, Glen P.] USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
RP Moore, EA (reprint author), USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
EM kevin.gross@afit.edu; vincent.farley@telops.com
OI Perram, Glen/0000-0002-4417-3929
NR 19
TC 3
Z9 3
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7570-1
J9 PROC SPIE
PY 2009
VL 7304
AR 730416
DI 10.1117/12.818710
PG 12
WC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
SC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
GA BVR69
UT WOS:000292557300033
ER
PT J
AU El Khoury, JM
Zhou, XL
Qu, LT
Dai, LM
Urbas, A
Li, Q
AF El Khoury, Jouliana M.
Zhou, Xiaoli
Qu, Liangti
Dai, Liming
Urbas, Augustine
Li, Quan
TI Organo-soluble photoresponsive azo thiol monolayer-protected gold
nanorods
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID SURFACE MODIFICATION; ASPECT-RATIO; NANOPARTICLES; POLYELECTROLYTE;
NANOSTRUCTURES; THERAPY; SHAPE
AB Organo-soluble photoresponsive azo thiol monolayer-protected gold nanorods were synthesized; the resulting gold nanorods encapsulated by thiols on their entire surface with strong covalent Au-S linkages were very stable in both organic solvents and in the solid state without aggregation or decomposition.
C1 [El Khoury, Jouliana M.; Zhou, Xiaoli; Li, Quan] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
[Urbas, Augustine] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Qu, Liangti; Dai, Liming] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
RP Li, Q (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
EM quan@lci.kent.edu
FU Air Force Research Laboratory; AFOSR; MURI [FA9550-06-1-0337]
FX This work was supported by Air Force Research Laboratory, and the AFOSR
under MURI grant FA9550-06-1-0337. We gratefully thank Dr O.
Lavrentovich and Dr J. West for the use of their characterization
equipment.
NR 32
TC 32
Z9 32
U1 2
U2 27
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2009
IS 16
BP 2109
EP 2111
DI 10.1039/b901826c
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 431OU
UT WOS:000265072800006
PM 19360162
ER
PT B
AU Ravindran, A
Burns, DJ
AF Ravindran, Arun
Burns, Daniel J.
GP IEEE
TI A Multi-Threaded DNA Tag/Anti-tag Library Generator for Multi-Core
Platforms
SO CIBCB: 2009 IEEE SYMPOSIUM ON COMPUTATIONAL INTELLIGENCE IN
BIOINFORMATICS AND COMPUTATIONAL BIOLOGY
LA English
DT Proceedings Paper
CT IEEE Symposium on Computational Intelligence in Bioinformatics and
Computational Biology
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
AB This paper describes a new approach to the problem of generating DNA tag/anti-tag libraries for use in biological assay methods. This approach couples multi-threaded coding methods and a highly parallel multi-population genetic algorithm to leverage performance gains made possible by the multi-core CPUs increasingly prevalent in today's commodity computers. We also describe the results of experiments characterizing the performance of this approach, which can yield up to an 8X speedup on a workstation equipped with dual quad-core CPUs. We observe that the coding effort required to implement this approach using the C language and Pthreads parallel programming model is greatly reduced compared to previous methods using both the VHDL language and reconfigurable hardware (FPGAs), and compared to C with the MPI API run on a cluster of computers.
C1 [Ravindran, Arun] Univ N Carolina, Dept Elect & Comp Engn, Charlotte, NC 28223 USA.
[Burns, Daniel J.] Air Force Res Lab, Informat Directorate, Rome, NY 13440 USA.
RP Ravindran, A (reprint author), Univ N Carolina, Dept Elect & Comp Engn, Charlotte, NC 28223 USA.
EM Arun.Ravindran@uncc.edu; Daniel.Burns@rl.af.mil
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2756-7
PY 2009
BP 168
EP +
PG 2
WC Computer Science, Artificial Intelligence; Engineering, Biomedical;
Engineering, Electrical & Electronic; Mathematical & Computational
Biology
SC Computer Science; Engineering; Mathematical & Computational Biology
GA BKT21
UT WOS:000269148600025
ER
PT J
AU Hoffman, SW
Harrison, C
AF Hoffman, Stuart W.
Harrison, Catherine
TI THE INTERACTION BETWEEN PSYCHOLOGICAL HEALTH AND TRAUMATIC BRAIN INJURY:
A NEUROSCIENCE PERSPECTIVE
SO CLINICAL NEUROPSYCHOLOGIST
LA English
DT Review
DE Brain injury; Post-traumatic stress disorder; Depression; Enriched
environment; Inflammation
ID POSTTRAUMATIC-STRESS-DISORDER; ENVIRONMENTAL ENRICHMENT REVERSES;
INFLAMMATORY RESPONSE; HEAD-INJURY; PREFRONTAL CORTEX; MAJOR DEPRESSION;
PREDATOR STRESS; ACUTE-PHASE; ADULT-RATS; SYMPTOMS
AB The occurrence of traumatic brain injury (TBI) and psychological health issues in the current theater of military operations has become a major factor in planning for the long-term healthcare of our wounded warriors. Post-traumatic stress disorder (PTSD) can coexist with brain injury in military members who have been exposed to blasts. Specific areas of the brain may be more susceptible to damage from blasts. In particular, damage to the prefrontal cortex can lead to disinhibition of cerebral structures that control fear and anxiety. Reactive systemic inflammatory processes related to TBI may also impair psychological health. Impaired psychological health may lead to increased psychological distress that impedes brain repair due to the release of stress-related hormones. Since the external environment has been shown to exert a significant influence on the internal environment of the organism, enriching the external environment may well reduce anxiety and facilitate the neuroplasticity of brain cells, thus promoting recovery of function after TBI.
C1 [Hoffman, Stuart W.] DVBIC Johnstown, Henry M Jackson Fdn Advancement Mil Med, Johnstown, PA 15905 USA.
[Harrison, Catherine] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hoffman, SW (reprint author), DVBIC Johnstown, Henry M Jackson Fdn Advancement Mil Med, 109 Sunray Dr, Johnstown, PA 15905 USA.
EM shoffman@dvbic-lh.org
NR 102
TC 24
Z9 25
U1 4
U2 19
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1385-4046
J9 CLIN NEUROPSYCHOL
JI Clin. Neuropsychol.
PY 2009
VL 23
IS 8
BP 1400
EP 1415
DI 10.1080/13854040903369433
PG 16
WC Psychology, Clinical; Clinical Neurology; Psychology
SC Psychology; Neurosciences & Neurology
GA 524KF
UT WOS:000272141500010
PM 19882478
ER
PT J
AU Bebarta, VS
Pitotti, R
Morgan, DL
Borys, D
AF Bebarta, V. S.
Pitotti, R.
Morgan, D. L.
Borys, D.
TI Seven Years of Cyanide Ingestions in the US - Critically Ill Patients
Are Common, but Antidote Use Is Not
SO CLINICAL TOXICOLOGY
LA English
DT Meeting Abstract
C1 [Bebarta, V. S.; Pitotti, R.] Wilford Hall USAF Med Ctr, San Antonio, TX USA.
[Bebarta, V. S.; Morgan, D. L.; Borys, D.] Cent Texas Poison Ctr, Temple, TX USA.
RI Bebarta, Vikhyat/M-1513-2015
NR 0
TC 1
Z9 1
U1 0
U2 1
PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1556-3650
J9 CLIN TOXICOL
JI Clin. Toxicol.
PY 2009
VL 47
IS 7
MA 249
BP 753
EP 753
PG 1
WC Toxicology
SC Toxicology
GA 496SH
UT WOS:000269996600264
ER
PT J
AU Frieze, A
Kleinberg, J
Ravi, R
Debany, W
AF Frieze, Alan
Kleinberg, Jon
Ravi, R.
Debany, Warren
TI Line-of-Sight Networks
SO COMBINATORICS PROBABILITY & COMPUTING
LA English
DT Article
CT Meeting on Combinatorics, Probability and Computing
CY OCT 29-NOV 04, 2006
CL Math Forsch Inst Oberwolfach, Bad Wurttemberg, GERMANY
HO Math Forsch Inst Oberwolfach
ID GUARDING GALLERIES; POINT SEES; CONNECTIVITY; GRAPH; AREA
AB Random geometric graphs have been one of the fundamental models for reasoning about wireless networks: one places n points at random in a region of the plane (typically a square or circle), and then connects pairs of points by an edge if they are within a fixed distance of one mother. In addition to giving rise to a range of basic theoretical questions, this class of random graphs has been a central analytical tool in the wireless networking community.
For many of the primary applications of wireless networks, however, the underlying environment has a large number of obstacles, and communication can only take place among nodes when they are close in space and when they have line-of-sight access to one another - consider, for example, urban settings or large indoor environments. In such domains, the standard model of random geometric graphs is not a good approximation of the true constraints, since it is not designed to capture the line-of-sight restrictions.
Here we propose a random-graph model incorporating both range limitations and line-of-sight constraints, and we prove asymptotically tight results for k-connectivity. Specifically, we consider points placed randomly on a grid (or torus), such that each node can see up to a fixed distance along the row and column it belongs to. (We think of the rows and columns as 'streets' and 'avenues' among a regularly spaced array of obstructions.) Further, we show that when the probability of node placement is a constant factor larger than the threshold for connectivity, near-shortest paths between pairs of nodes can be found, with high probability, by an algorithm using only local information. In addition to analysing connectivity and k-connectivity, we also study the emergence of a giant component, as well an approximation question, in which we seek to connect a set of given nodes in such an environment by adding a small set of additional 'relay' nodes.
C1 [Frieze, Alan] Carnegie Mellon Univ, Dept Math Sci, Pittsburgh, PA 15213 USA.
[Kleinberg, Jon] Cornell Univ, Dept Comp Sci, Ithaca, NY 14853 USA.
[Ravi, R.] Carnegie Mellon Univ, Tepper Sch Business, Pittsburgh, PA 15213 USA.
[Debany, Warren] USAF, Res Lab, RIG, Informat Grid Div, Rome, NY 13441 USA.
RP Frieze, A (reprint author), Carnegie Mellon Univ, Dept Math Sci, Pittsburgh, PA 15213 USA.
EM lan@random.math.cmu.edu; kleinber@cs.cornell.edu; ravi+@andrew.cmu.edu;
warren.debany@rl.af.mil
RI Frieze, Alan/B-8140-2017;
OI Frieze, Alan/0000-0002-8481-5615; Ravi, R/0000-0001-7603-1207
NR 24
TC 3
Z9 3
U1 0
U2 3
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0963-5483
J9 COMB PROBAB COMPUT
JI Comb. Probab. Comput.
PD JAN-MAR
PY 2009
VL 18
IS 1-2
BP 145
EP 163
DI 10.1017/S0963548308009334
PG 19
WC Computer Science, Theory & Methods; Mathematics; Statistics &
Probability
SC Computer Science; Mathematics
GA 431FS
UT WOS:000265047400008
ER
PT J
AU Litzinger, T
Colket, M
Kahandawala, M
Katta, V
Lee, SY
Liscinsky, D
McNesby, K
Pawlik, R
Roquemore, M
Santoro, R
Sidhu, S
Stouffer, S
Wu, J
AF Litzinger, T.
Colket, M.
Kahandawala, M.
Katta, V.
Lee, S. -Y.
Liscinsky, D.
McNesby, K.
Pawlik, R.
Roquemore, M.
Santoro, R.
Sidhu, S.
Stouffer, S.
Wu, J.
TI Fuel Additive Effects on Soot across a Suite of Laboratory Devices, Part
1: Ethanol
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Ethanol; PAH; Soot
ID CHEMICAL KINETIC-MODEL; FLAMES; HYDROCARBONS
AB The impact of a variety of non-metallic fuel additives on soot was investigated in a collaborative university, industry and government effort. The main objective of this program was to obtain fundamental understanding of the mechanisms through which blending compounds into a fuel affects soot emissions. The research team used a suite of laboratory devices that included a shock tube, a well-stirred reactor, a premixed flat flame, an opposed-jet diffusion flame, and a high pressure turbulent reactor. The work reported here focuses on the effects of ethanol addition to ethylene on soot. The addition of ethanol led to substantial reductions in soot in all of the devices except for the opposed-jet diffusion flame. Modeling of the premixed flame and opposed-jet diffusion flame was used to obtain insights into the mechanism behind the opposing effects of ethanol addition in these two flames.
C1 [Litzinger, T.; Lee, S. -Y.; Santoro, R.; Wu, J.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
[Colket, M.; Liscinsky, D.] United Technol Res Ctr, E Hartford, CT 06108 USA.
[Kahandawala, M.; Sidhu, S.] Univ Dayton, Dept Mech Engn, Dayton, OH 45469 USA.
[Katta, V.] Innovat Sci Solut Inc, Dayton, OH USA.
[McNesby, K.] USA, Res Lab, Aberdeen, MD USA.
[Pawlik, R.; Roquemore, M.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Stouffer, S.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Litzinger, T (reprint author), Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
EM tal2@psu.edu
FU Strategic Environmental Research and Development Program (SERDP)
[PP1179]
FX The authors acknowledge the financial support for this work provided by
the Strategic Environmental Research and Development Program (SERDP),
Project PP1179, under the direction of Dr. Charles Pellerin.
NR 27
TC 7
Z9 8
U1 0
U2 7
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-2202
J9 COMBUST SCI TECHNOL
JI Combust. Sci. Technol.
PY 2009
VL 181
IS 2
BP 310
EP 328
AR PII 908221431
DI 10.1080/00102200802437445
PG 19
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical
SC Thermodynamics; Energy & Fuels; Engineering
GA 400HR
UT WOS:000262859100007
ER
PT J
AU Holcomb, T
Herzinger, K
AF Holcomb, Trae
Herzinger, Kurt
TI UNITARY NUMERICAL SEMIGROUPS AND PERFECT BRICKS
SO COMMUNICATIONS IN ALGEBRA
LA English
DT Article
DE Dual; Minimal generating set; Numerical semigroup; Relative ideal;
Unitary
ID TENSOR-PRODUCTS; RIGIDITY; MODULES; TORSION; IDEAL; SETS; TOR
AB This article completes a previous investigation of balanced and unitary numerical semigroups. The main result establishes the equivalence of unitary numerical semigroups and perfect 2 x 2 bricks.
C1 [Holcomb, Trae; Herzinger, Kurt] USAF Acad, Dept Math Sci, Colorado Springs, CO 80840 USA.
RP Herzinger, K (reprint author), USAF Acad, Dept Math Sci, 2354 Fairchild Dr,Suite 6D124, Colorado Springs, CO 80840 USA.
EM kurt.herzinger@usafa.edu
NR 12
TC 2
Z9 2
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0092-7872
J9 COMMUN ALGEBRA
JI Commun. Algebr.
PY 2009
VL 37
IS 7
BP 2496
EP 2508
DI 10.1080/00927870802174165
PG 13
WC Mathematics
SC Mathematics
GA 503ZW
UT WOS:000270582700029
ER
PT J
AU Kim, KT
AF Kim, Kristopher T.
TI Comparison and Improvement of the Computational Efficiencies of Two
FFT-Based Iterative Solution Methods for the Scalar Multiple-Scattering
Equation
SO COMMUNICATIONS IN COMPUTATIONAL PHYSICS
LA English
DT Article
DE Multiple scattering; iterative method; FFT; symmetry
ID ELECTROMAGNETIC SCATTERING; T-MATRIX
AB We consider two existing FFT-based fast-convolution iterative solution techniques for the scalar T-matrix multiple-scattering equation [1]. The use of the FFT operation requires field values be expressed on a regular Cartesian grid and the two techniques differ in how to go about achieving this. The first technique [6,7] uses the nondiagonal translation operator [1,9] of the spherical multipole field, while the second method [11] uses the diagonal translation operator of Rokhlin [10]. Because of its use of the non-diagonal translator, the first technique has been thought to require a greater number of spatial convolutions than the second technique. We establish that the first method requires only half as many convolution operations as the second method for a comparable numerical accuracy and demonstrate, based on an actual CPU time comparison, that it can therefore perform iterations faster than the second method. We then consider the respective symmetry relations of the non-diagonal and diagonal translators and discuss a memory-reduction procedure for both FFT-based methods. In this procedure, we need to store only the minimum sets of near-field and far-field translation operators and generate missing elements on the fly using the symmetry relations. We show that the relative cost of generating the missing elements becomes smaller as the number of scatterers increases.
C1 USAF, Res Lab, Electromagnet Scattering Branch, Sensors Directorate, Hanscom AFB, MA 01731 USA.
RP Kim, KT (reprint author), USAF, Res Lab, Electromagnet Scattering Branch, Sensors Directorate, Hanscom AFB, MA 01731 USA.
EM trout@ieee.org
NR 13
TC 2
Z9 2
U1 1
U2 1
PU GLOBAL SCIENCE PRESS
PI WANCHAI
PA ROOM 2303, OFFICER TOWER, CONVENTION PLAZA, 1 HARBOUR ROAD, WANCHAI,
HONG KONG 00000, PEOPLES R CHINA
SN 1815-2406
J9 COMMUN COMPUT PHYS
JI Commun. Comput. Phys.
PD JAN
PY 2009
VL 5
IS 1
BP 108
EP 125
PG 18
WC Physics, Mathematical
SC Physics
GA 392IE
UT WOS:000262295600005
ER
PT J
AU Huang, JQ
Wood, AW
Havrilla, MJ
AF Huang, Junqi
Wood, Aihua W.
Havrilla, Michael J.
TI A Hybrid Finite Element-Laplace Transform Method for the Analysis of
Transient Electromagnetic Scattering by an Over-Filled Cavity in the
Ground Plane
SO COMMUNICATIONS IN COMPUTATIONAL PHYSICS
LA English
DT Article
DE Overfilled cavity; time domain electromagnetic scattering; Laplace
transform; finite element method
ID BOUNDARY INTEGRAL METHOD; DOMAIN DECOMPOSITION; NUMERICAL INVERSION;
OVERFILLED CAVITY; SIMULATION; EQUATION; ANTENNAS
AB A hybrid finite element-Laplace transform method is implemented to analyze the time domain electromagnetic scattering induced by a 2-D overfilled cavity embedded in the infinite ground plane. The algorithm divides the whole scattering domain into two, interior and exterior, sub-domains. In the interior sub-domain which covers the cavity, the problem is solved via the finite element method. The problem is solved analytically in the exterior sub-domain which slightly overlaps the interior subdomain and extends to the rest of the upper half plane. The use of the Laplace transform leads to an analytical link condition between the overlapping sub-domains. The analytical link guides the selection of the overlapping zone and eliminates the need to use the conventional Schwartz iteration. This dramatically improves the efficiency for solving transient scattering problems. Numerical solutions are tested favorably against analytical ones for a canonical geometry. The perfect link over the artificial boundary between the finite element approximation in the interior and analytical solution in the exterior further indicates the reliability of the method. An error analysis is also performed.
C1 [Huang, Junqi; Wood, Aihua W.; Havrilla, Michael J.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Wood, AW (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Junqi.Huang@afit.edu; Aihua.Wood@afit.edu; Havrilla@afit.edu
FU Air Force Office of Scientific Research
FX This work was supported in part by the Air Force Office of Scientific
Research. 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 35
TC 14
Z9 15
U1 1
U2 1
PU GLOBAL SCIENCE PRESS
PI WANCHAI
PA ROOM 2303, OFFICER TOWER, CONVENTION PLAZA, 1 HARBOUR ROAD, WANCHAI,
HONG KONG 00000, PEOPLES R CHINA
SN 1815-2406
J9 COMMUN COMPUT PHYS
JI Commun. Comput. Phys.
PD JAN
PY 2009
VL 5
IS 1
BP 126
EP 141
PG 16
WC Physics, Mathematical
SC Physics
GA 392IE
UT WOS:000262295600006
ER
PT J
AU Booksh, KS
Bronk, B
Czege, J
AF Booksh, K. S.
Bronk, B.
Czege, J.
BE Brown, SD
Tauler, R
Walczak, B
TI Three-Way Calibration
SO COMPREHENSIVE CHEMOMETRICS: CHEMICAL AND BIOCHEMICAL DATA ANALYSIS, VOLS
1-4
LA English
DT Article; Book Chapter
ID MULTIVARIATE CURVE RESOLUTION; LEAST-SQUARES/RESIDUAL BILINEARIZATION;
QUANTIFYING CHEMICAL-COMPOSITION; ANNIHILATION FACTOR-ANALYSIS; MATRIX
FLUORESCENCE-SPECTRA; RANK 2ND-ORDER CALIBRATION; 1ST-ORDER RAYLEIGH
SCATTER; 8 TETRACYCLINE ANTIBIOTICS; LIQUID-CHROMATOGRAPHY DATA;
RESTRICTED-TUCKER MODELS
C1 [Booksh, K. S.] Univ Delaware, Newark, DE USA.
[Bronk, B.; Czege, J.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Booksh, KS (reprint author), Univ Delaware, Newark, DE USA.
NR 63
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-44-452701-1
PY 2009
BP B379
EP B412
PG 34
WC Chemistry, Medicinal; Pharmacology & Pharmacy
SC Pharmacology & Pharmacy
GA BCS71
UT WOS:000311292900063
ER
PT J
AU Chatterjee, P
Mukherjee, S
Chaudhuri, S
Seetharaman, G
AF Chatterjee, Priyam
Mukherjee, Sujata
Chaudhuri, Subhasis
Seetharaman, Guna
TI Application Of Papoulis-Gerchberg Method In Image Super-Resolution and
Inpainting
SO COMPUTER JOURNAL
LA English
DT Article
DE Papoulis-Gerchberg; super-resolution; interpolation; inpainting
ID GINZBURG-LANDAU EQUATION; SUPER-RESOLUTION; RECONSTRUCTION;
EXTRAPOLATION
AB In this paper, we study the Papoulis-Gerchberg (PG) method and its applications to domains of image restoration such as super-resolution (SR) and inpainting. We show that the method performs well under certain conditions. We then suggest improvements to the method to achieve better SR and inpainting results. The modification applied to the SR process also allows us to apply the method to a larger class of images by doing away with some of the restrictions inherent in the classical PG method. We also present results to demonstrate the performance of the proposed techniques.
C1 [Chatterjee, Priyam; Mukherjee, Sujata; Chaudhuri, Subhasis] Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India.
[Seetharaman, Guna] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Chaudhuri, S (reprint author), Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India.
EM sc@ee.iitb.ac.in
FU AOARD, USA; ISRO, India
FX Funding supports from AOARD, USA and ISRO, India, are gratefully
acknowledged. The authors would also like to thank the reviewers whose
suggestions and constructive criticism have brought this paper to its
current state. We would also like to extend our gratitude to Hiroyuki
Takeda for providing us results of his research to compare with our
results.
NR 39
TC 20
Z9 21
U1 0
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0010-4620
J9 COMPUT J
JI Comput. J.
PD JAN
PY 2009
VL 52
IS 1
BP 80
EP 89
DI 10.1093/comjnl/bxm050
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Computer Science, Software Engineering; Computer Science,
Theory & Methods
SC Computer Science
GA 404OM
UT WOS:000263162700006
ER
PT J
AU O'Hara, P
Duarte, CA
Eason, T
AF O'Hara, P.
Duarte, C. A.
Eason, T.
TI Generalized finite element analysis of three-dimensional heat transfer
problems exhibiting sharp thermal gradients
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE Generalized finite elements; Global local finite elements; Hp methods;
Multiscale problems; Rough solutions; High order methods
ID DYNAMIC CRACK-PROPAGATION; STRATEGY; SIMULATION; PARTITION
AB In this paper, heat transfer problems exhibiting sharp thermal gradients are analyzed using the classical and generalized finite element methods. The effect of solution roughness on the ability of the methods to obtain accurate approximations is investigated. Convergence Studies show that low order (linear and quadratic) elements require strongly refined meshes for acceptable accuracy.
We propose a generalized FEM with global-local enrichments for the class of problems investigated in the paper. In this procedure, a global Solution space defined on a coarse mesh is enriched through the partition Of unity framework of the generalized FEM with solutions of local boundary value problems. The local problems are defined using the same procedure as in the global-local FEM, where boundary conditions are provided by a coarse scale global solution. Coarse, uniform, global meshes are acceptable even at regions with thermal spikes that are orders of magnitude smaller than the element size. Convergence oil these discretizations was achieved even when no or limited convergence was observed in the local problems. Two approaches are proposed to improve the boundary conditions prescribed on local problems and their convergence. The use of the corresponding improved local solutions as enrichments for the global problem extends the range of target error level for the enriched global problem.
The two-way information transfer provided by the proposed generalized FEM is appealing to several classes of problems, especially those involving multiple spatial scales. The proposed methodology brings the benefits of generalized FEM to problems where limited or no information about the solution is known a priori. (C) 2009 Elsevier B.V. All rights reserved.
C1 [O'Hara, P.; Duarte, C. A.] Univ Illinois, Dept Civil & Environm Engn, Newmark Lab, Urbana, IL 61801 USA.
[Eason, T.] USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
RP Duarte, CA (reprint author), Univ Illinois, Dept Civil & Environm Engn, Newmark Lab, 205 N Mathews Ave, Urbana, IL 61801 USA.
EM pohara@uiuc.edu; caduarte@uiuc.edu; Thomas.Eason@wpafb.af.mil
RI Duarte, Carlos Armando/B-1753-2008
OI Duarte, Carlos Armando/0000-0002-0048-0679
FU U.S. Air Force Research Laboratory Air Vehicles Directorate
[FA8650-06-2-3620]
FX The authors gratefully acknowledge the contributions of the Midwest
Structural Sciences Center (MSSC) at the University of Illinois at
Urbana-Champaign. The Center is supported by the U.S. Air Force Research
Laboratory Air Vehicles Directorate under Contract No. FA8650-06-2-3620.
NR 48
TC 38
Z9 38
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
EI 1879-2138
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2009
VL 198
IS 21-26
SI SI
BP 1857
EP 1871
DI 10.1016/j.cma.2008.12.024
PG 15
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 443IH
UT WOS:000265902900019
ER
PT J
AU Gerschutz, MJ
Phillips, CA
Reynolds, DB
Repperger, DW
AF Gerschutz, Maria J.
Phillips, Chandler A.
Reynolds, David B.
Repperger, Daniel W.
TI A computational simulated control system for a high-force pneumatic
muscle actuator: system definition and application as an augmented
orthosis
SO COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
LA English
DT Article
DE pneumatic muscle actuator; control system; feed-back control; augmented
orthosis; phenomenological model; time constant
ID SIT-TO-STAND; ISOMETRIC CONTRACTION; BIOMIMETIC MODEL; PERFORMANCE;
ROBOT; CHAIR
AB High-force pneumatic muscle actuators (PMAs) are used for force assistance with minimal displacement applications. However, poor control due to dynamic nonlinearities has limited PMA applications. A simulated control system is developed consisting of: (1) a controller relating an input position angle to an output proportional pressure regulator voltage, (2) a phenomenological model of the PMA with an internal dynamic force loop (system time constant information), (3) a physical model of a human sit-to-stand task and (4) an external position angle feed-back loop. The results indicate that PMA assistance regarding the human sit-to-stand task is feasible within a specified PMA operational pressure range.
C1 [Gerschutz, Maria J.; Phillips, Chandler A.; Reynolds, David B.] Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
[Repperger, Daniel W.] USAF, Res Lab, Dayton, OH USA.
RP Gerschutz, MJ (reprint author), Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
EM gerschutz.4@wright.edu; chandler.phillips@wright.edu;
david.reynolds@wright.edu; repperger@wpafb.af.mil
NR 27
TC 4
Z9 4
U1 1
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1025-5842
J9 COMPUT METHOD BIOMEC
JI Comput. Methods Biomech. Biomed. Eng.
PY 2009
VL 12
IS 2
BP 173
EP 183
AR PII 903194011
DI 10.1080/10255840802372052
PG 11
WC Computer Science, Interdisciplinary Applications; Engineering,
Biomedical
SC Computer Science; Engineering
GA 412HY
UT WOS:000263717100006
PM 18828027
ER
PT J
AU Martin, GD
Loth, E
Lankford, D
AF Martin, G. D.
Loth, E.
Lankford, D.
TI Particle host cell determination in unstructured grids
SO COMPUTERS & FLUIDS
LA English
DT Article
ID TRACKING
AB An algorithm has been developed to efficiently determine the correct particle host cell for unstructured grids with multiple element types (e.g. tetrahedrons, prisms, hexahedrons, etc.) and large particle movements (e.g. movement across single or multiple cells). The algorithm utilizes a "dot product" searching technique where a direction vector connecting a face centroid and the particle location is dotted with an outwardly-positive face normal to facilitate the host cell search. The algorithm is investigated for particles moving a distance of one or several cell lengths on a variety of two-dimensional (2-D) and three-dimensional (3-D) meshes. Two variations of this approach are introduced and tested, each focusing on different strategies (cell-searching vs. face-searching minimization) to optimize the use of computational resources. Finally, in order to increase the efficiency of each algorithm in the case of large problems where the previous host cell is not known, a "coarse-grain" search is introduced, whereby a small sampling of the total cells are inspected, after which the adjoining-faces search is completed in the host sub-domain. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Martin, G. D.; Loth, E.] Univ Illinois, Dept Aeronaut & Astronaut Engn, Talbot Lab 306, Urbana, IL 61801 USA.
[Lankford, D.] Aerosp Testing Alliance, Arnold Engn Dev Ctr, Arnold AFB, TN 37389 USA.
RP Loth, E (reprint author), Univ Illinois, Dept Aeronaut & Astronaut Engn, Talbot Lab 306, 104 S Wright St, Urbana, IL 61801 USA.
EM loth@uiuc.edu
RI Loth, Eric/C-5805-2008
NR 11
TC 6
Z9 6
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7930
J9 COMPUT FLUIDS
JI Comput. Fluids
PD JAN
PY 2009
VL 38
IS 1
BP 101
EP 110
DI 10.1016/j.compfluid.2008.01.005
PG 10
WC Computer Science, Interdisciplinary Applications; Mechanics
SC Computer Science; Mechanics
GA 370AP
UT WOS:000260735400008
ER
PT J
AU Guha, S
Rogers, JW
Sheng, Q
AF Guha, S.
Rogers, J. W.
Sheng, Q.
TI Effective stretching strategies for paraxial lightwave propagation
simulations
SO COMPUTERS & STRUCTURES
LA English
DT Article; Proceedings Paper
CT 5th MIT Conference on Computational Fluid and Solid Mechanics
CY JUN 17-19, 2009
CL MIT, Cambridge, MA
HO MIT
DE Light beam propagations; Paraxial differential equations; Uniform and
nonuniform grids; Finite difference approximations; Hyperbolic
exponential fittings; Stretching transformations
ID WAVE-EQUATION APPROXIMATIONS; IMMERSED INTERFACE METHOD; DISCONTINUOUS
COEFFICIENTS; HETEROGENEOUS MEDIA; ELLIPTIC-EQUATIONS; VALIDITY;
SCHEMES; FLOW
AB Stretching computation strategies, including the hyperbolic exponential fittings along the lens interface, stretching transformations in z- and r-directions are discussed in this paper. The resulted adapted finite difference schemes are not only simple in structure, but also highly effective and efficient in the solution of paraxial Helmholtz equations for light beam propagation simulations and high performance lens designs. Cylindrically symmetric lens domains are assumed. Simulation results are given to illustrate the aforementioned numerical, strategies with laboratory applications. Detailed algorithmic structures are given for immediate programming implementations and for similar lightwave propagation computation issues. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Rogers, J. W.; Sheng, Q.] Baylor Univ, Ctr Astrophys Space Phys & Engn Res, Dept Math, Waco, TX 76798 USA.
[Guha, S.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Sheng, Q (reprint author), Baylor Univ, Ctr Astrophys Space Phys & Engn Res, Dept Math, Waco, TX 76798 USA.
EM Qin_Sheng@baylor.edu
NR 40
TC 0
Z9 0
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7949
J9 COMPUT STRUCT
JI Comput. Struct.
PY 2009
VL 87
IS 11-12
SI SI
BP 784
EP 792
DI 10.1016/j.compstruc.2008.11.016
PG 9
WC Computer Science, Interdisciplinary Applications; Engineering, Civil
SC Computer Science; Engineering
GA 451ER
UT WOS:000266454000018
ER
PT J
AU Kudryavtsev, AA
Demidov, VI
DeJoseph, CA
Adams, SF
Serditov, KY
AF Kudryavtsev, A. A.
Demidov, V. I.
DeJoseph, C. A., Jr.
Adams, S. F.
Serditov, K. Yu.
TI Probe Measurements in Electronegative Plasmas: Modeling the Perturbative
Effects of the Probe-Holder
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE Electric probe; probe-holder; electronegative plasma; modeling
ID NEGATIVE-ION DENSITIES; OXYGEN DISCHARGE; POSITIVE-COLUMN; SCALING LAWS
AB A basic property of an electronegative plasma is its separation into two distinct regions: an ion-ion region far from boundaries, where the densities of positive and negative ions are higher then electron density, and a near-boundary electron-ion region, where negative ions have practically negligible density. This is due to the influence of the ambipolar electric field, which depends on electron (not negative ion) plasma parameters. This electric field "holds off" negative ions from the boundary, as the ions have lower mobility and temperature compared to the electrons. Therefore, negative ions will be repelled by any object inserted into the plasma. This can lead to errors in measurements of negative ion and electron parameters by any invasive method. Numerical modeling of electric probes in an argon-oxygen plasma clearly demonstrates possible errors of direct measurements of negative ion probe current. This can also affect results from the photo-detachment method and direct measurements of negative ion energy distribution. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Demidov, V. I.] Universal Energy Syst Inc, Beavercreek, OH 45432 USA.
[Kudryavtsev, A. A.; Serditov, K. Yu.] St Petersburg State Univ, St Petersburg 198904, Russia.
[DeJoseph, C. A., Jr.; Adams, S. F.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Demidov, VI (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Beavercreek, OH 45432 USA.
EM vladimir.demidov@wpafb.af.mil
RI Demidov, Vladimir/A-4247-2013; Kudryavtsev, Anatoly/I-3413-2012
OI Demidov, Vladimir/0000-0002-2672-7684; Kudryavtsev,
Anatoly/0000-0002-2232-2954
FU Air Force Office of Scientific Research through STTR Phase 2 program
FX This work was supported by the Air Force Office of Scientific Research
through STTR Phase 2 program.
NR 21
TC 2
Z9 2
U1 0
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0863-1042
EI 1521-3986
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2009
VL 49
IS 6
BP 373
EP 380
DI 10.1002/ctpp.200910034
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 484SU
UT WOS:000269068600003
ER
PT S
AU Ojard, G
Morscher, G
Gowayed, Y
Santhosh, U
Ahmad, J
Miller, R
John, R
AF Ojard, G.
Morscher, G.
Gowayed, Y.
Santhosh, U.
Ahmad, J.
Miller, R.
John, R.
BE Salem, J
Fuller, ER
TI THERMOCOUPLE INTERACTIONS DURING TESTING OF MELT INFILTRATED CERAMIC
MATRIX COMPOSITES
SO CORROSION, WEAR, FATIGUE, AND RELIABILITY OF CERAMICS
SE Ceramic Engineering and Science Proceedings
LA English
DT Proceedings Paper
CT 32nd International Conference on Advanced Ceramics and Composites
CY JAN 27-FEB 01, 2008
CL Daytona Beach, FL
SP Amer Ceram Soc, ACerS Engn Ceram Div
AB As high performance ceramic matrix composite systems, such as Melt Infiltrated (MI) SiC/SiC, are being considered for advanced gas turbine engine applications, the characterization of the material becomes more important. A series of tests were conducted where Pt and Ni sheathed Pt thermocouples were used to monitor temperature for short and long duration fast fracture, fatigue and creep tests. While it is known that Si forms eutectics with Pt and Ni, this was initially not considered an issue. But since M I SiC/SiC composite achieves much of its performance from the infiltrated phase of Silicon (for high conductivity and low porosity), it was felt that further study of possible interactions of the Si phase has to be considered.
Post-test real-time X-ray inspection of the mechanical time-dependent and time-independent testing revealed that the extent of alloying into the sample was greater than anticipated and in some cases extended throughout the entire gage section of the tensile bars. It was concluded that the interactions were limited to the Si Phase of the material and that there was no difference between samples affected by alloying versus those that did not. Additionally, an experimental approach was taken to limit the extent of the thermocouple interaction. The results of this study and the approach will be presented and discussed.
C1 [Ojard, G.; Miller, R.] Pratt & Whitney, E Hartford, CT USA.
[John, R.] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
[Morscher, G.] Ohio Aerosp Inst, Cleveland, OH USA.
[Gowayed, Y.] Auburn Univ, Aubum, AL USA.
[Santhosh, U.; Ahmad, J.] Res Applicat Inc, San Diego, CA USA.
RP Ojard, G (reprint author), Pratt & Whitney, E Hartford, CT USA.
FU Materials & Manufacturing Directorate [F33615-01-C-5234,
F33615-03-D-2354-DO4]; Air Force Research Laboratory [F33615-01-C-5234,
F33615-03-D-2354-DO4]
FX The Materials & Manufacturing Directorate, Air Force Research Laboratory
under contract F33615-01-C-5234 and contract F33615-03-D-2354-DO4
sponsored portions of this work
NR 11
TC 0
Z9 0
U1 0
U2 0
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 0196-6219
BN 978-0-470-34493-4
J9 CERAM ENG SCI PROC
PY 2009
VL 29
IS 3
BP 11
EP +
DI 10.1002/9780470456347.ch2
PG 2
WC Engineering, Mechanical; Materials Science, Ceramics
SC Engineering; Materials Science
GA BJD50
UT WOS:000265017600002
ER
PT S
AU Mall, S
Ahn, JM
AF Mall, Shankar
Ahn, Joon-Mo
BE Salem, J
Fuller, ER
TI INVESTIGATION INTO CYCLIC FREQUENCY EFFECTS ON FATIGUE BEHAVIOR OF AN
OXIDE/OXIDE COMPOSITE
SO CORROSION, WEAR, FATIGUE, AND RELIABILITY OF CERAMICS
SE CERAMIC ENGINEERING AND SCIENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 32nd International Conference on Advanced Ceramics and Composites
CY JAN 27-FEB 01, 2008
CL Daytona Beach, FL
SP Amer Ceram Soc, ACerS Engn Ceram Div
AB An oxide-oxide CMC with no interface, Nextel720 (TM)/alumina, was investigated under tension-tension fatigue condition at three frequencies (1, 100 and 900 Hz) to characterize the effects of cyclic frequency at room temperature. Cycles to failure at a stress level increased considerably with increase of the cyclic frequency from 100 to 900 Hz, but not much between 1 and 100 Hz. Local fiber/matrix interfacial bonding due to the frictional heating at the highest frequency of 900 Hz was observed during cycling. This may have caused an increase in the fatigue life/strength of the tested CMC system at the highest frequency of 900 Hz.
C1 [Mall, Shankar] USAF, Dept Aeronaut & Astronaut, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), USAF, Dept Aeronaut & Astronaut, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 4
TC 0
Z9 0
U1 0
U2 2
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 0196-6219
BN 978-0-470-34493-4
J9 CERAM ENG SCI PROC
PY 2009
VL 29
IS 3
BP 111
EP 115
DI 10.1002/9780470456347.ch12
PG 5
WC Engineering, Mechanical; Materials Science, Ceramics
SC Engineering; Materials Science
GA BJD50
UT WOS:000265017600012
ER
PT S
AU Su, YJ
AF Su, Yi-Jiun
BE Strassmeier, KG
Kosovichev, AG
Beckman, JE
TI Electromagnetic interaction between Jupiter's ionosphere and the Io
plasma torus
SO COSMIC MAGNETIC FIELDS: FROM PLANETS, TO STARS AND GALAXIES
SE IAU Symposium Proceedings Series
LA English
DT Proceedings Paper
CT 259th Symposium of the International-Astronomical-Union
CY NOV 03-07, 2008
CL Puerto Santiago, SPAIN
SP Int Astron Union, Inst Astrophys Canarias, Astrophys Inst Potsdam
DE Acceleration of particles; waves; plasmas; planets and satellites
ID PARALLEL ELECTRIC-FIELDS; PARTICLE-ACCELERATION; ALFVEN WAVES;
MAGNETOSPHERE; HYDROGEN; AURORA; ARCS
AB The electromagnetic interaction between Jupiter and Io has been studied extensively since the discovery of Io-controlled decametric radio emissions (DAMs). A variety of mechanisms for electromagnetic disturbances have been considered including a unipolar inductor, the excitation of large-amplitude Alfven waves, the generation of electrostatic electric fields parallel to the ambient magnetic field, and etc. Recently, three auroral acceleration regions categorized by terrestrial physicists have been applied to the Jupiter-Io coupling system: the Alfvenic acceleration region is associated with bright emissions at Io's magnetic footprint, whereas the quasi-static system of anti-planetward and planetward currents set up at the inner and outer edges of the torus in the downstream region of Io's wake. This review paper summarizes the current understanding of the coupling mechanisms between Jupiters ionosphere and the Io plasma torus, as well as the electron acceleration mechanism necessary to excite Io-associated emissions.
C1 USAF, Res Lab, RVBXP, AFB, MA 01731 USA.
RP Su, YJ (reprint author), USAF, Res Lab, RVBXP, 29 Randolph Rd, AFB, MA 01731 USA.
EM yijiunsu@gmail.com
NR 52
TC 0
Z9 0
U1 0
U2 1
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
SN 1743-9213
BN 978-0-521-88990-2
J9 IAU SYMP P SERIES
JI IAU Symposium Proc. Series
PY 2009
VL 4
IS 259
BP 271
EP 282
DI 10.1017/S1743921309030610
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BJL60
UT WOS:000266769600059
ER
PT S
AU Grabowski, C
Degnan, JH
Camacho, JF
Coffey, CK
Coulter, G
Domonkos, M
Gale, D
Martinez, B
Parker, J
Ralph, D
Ruden, EL
Sommars, W
Hsu, SC
Intrator, TP
Renneke, RM
Sieck, P
Waganaar, WJ
Wurden, GA
Thio, YCF
AF Grabowski, C.
Degnan, J. H.
Camacho, J. F.
Coffey, S. K.
Coulter, G.
Domonkos, M.
Gale, D.
Martinez, B.
Parker, J.
Ralph, D.
Ruden, E. L.
Sommars, W.
Hsu, S. C.
Intrator, T. P.
Renneke, R. M.
Sieck, P.
Waganaar, W. J.
Wurden, G. A.
Thio, Y. C. F.
BE Panarella, E
Raman, R
TI FRC COMPRESSION HEATING EXPERIMENT (CHX) AT AFRL
SO CURRENT TRENDS IN INTERNATIONAL FUSION RESEARCH, PROCEEDINGS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 7th Symposium on Evaluation of Current Trends in Fusion Research
CY MAR 05-09, 2007
CL Washington, DC
SP Fus Reactor Technol
C1 [Grabowski, C.; Degnan, J. H.; Camacho, J. F.; Coffey, S. K.; Coulter, G.; Domonkos, M.; Gale, D.; Martinez, B.; Parker, J.; Ralph, D.; Ruden, E. L.; Sommars, W.] USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Grabowski, C (reprint author), USAF, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RI Thio, Yong Chia/G-5442-2014; Wurden, Glen/A-1921-2017;
OI Thio, Yong Chia/0000-0003-3615-643X; Wurden, Glen/0000-0003-2991-1484;
Hsu, Scott/0000-0002-6737-4934
NR 1
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0691-9
J9 AIP CONF PROC
PY 2009
VL 1154
BP 47
EP 48
PG 2
WC Physics, Applied
SC Physics
GA BLE22
UT WOS:000269998900009
ER
PT S
AU Ruden, EL
Zhang, S
Intrator, TP
Wurden, GA
Renneke, R
Waganaar, WJ
Analla, FT
Grabowski, TC
AF Ruden, E. L.
Zhang, Shouyin
Intrator, T. P.
Wurden, G. A.
Renneke, R.
Waganaar, W. J.
Analla, F. T.
Grabowski, T. C.
BE Panarella, E
Raman, R
TI EXPERIMENTAL PROFILE EVOLUTION OF THE FRX-L HIGH DENSITY FIELD REVERSED
CONFIGURATION INFERRED FROM MULTICHORD INTERFEROMETRY
SO CURRENT TRENDS IN INTERNATIONAL FUSION RESEARCH, PROCEEDINGS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 7th Symposium on Evaluation of Current Trends in Fusion Research
CY MAR 05-09, 2007
CL Washington, DC
SP Fus Reactor Technol
C1 [Ruden, E. L.] USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Ruden, EL (reprint author), USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RI Wurden, Glen/A-1921-2017
OI Wurden, Glen/0000-0003-2991-1484
NR 3
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0691-9
J9 AIP CONF PROC
PY 2009
VL 1154
BP 163
EP 164
PG 2
WC Physics, Applied
SC Physics
GA BLE22
UT WOS:000269998900029
ER
PT B
AU Fukata, K
Washio, T
Yada, K
Motoda, H
AF Fukata, Kenta
Washio, Takashi
Yada, Katsutoshi
Motoda, Hiroshi
BE Ohsawa, Y
Yada, K
TI A Method to Search ARX Model Orders and Its Application to Sales
Dynamics Analysis
SO DATA MINING FOR DESIGN AND MARKETING
SE Chapman & Hall-CRC Data Mining and Knowledge Discovery Series
LA English
DT Article; Book Chapter
ID PERFORMANCE; FUTURE; IMPACT
C1 [Fukata, Kenta] Osaka Univ, Grad Sch Engn, Osaka, Japan.
[Motoda, Hiroshi] USAF, Asian Off Aerosp Res & Dev, AF Off Sci Res, Tokyo, Japan.
[Washio, Takashi] Osaka Univ, Inst Sci & Ind Res, Osaka, Japan.
[Yada, Katsutoshi] Kansai Univ, Fac Commerce, Osaka, Japan.
[Yada, Katsutoshi] Osaka Ind Univ, Dept Business Adm, Osaka, Japan.
RP Fukata, K (reprint author), Osaka Univ, Grad Sch Engn, Osaka, Japan.
NR 19
TC 0
Z9 0
U1 0
U2 1
PU CHAPMAN & HALL/CRC PRESS
PI BOCA RATON
PA 6000 BROKEN SOUND PKWY, NW, STE 300, BOCA RATON, FL 33487 USA
BN 978-1-4200-7019-4
J9 CH CRC DATA MIN KNOW
PY 2009
BP 81
EP 94
D2 10.1201/9781420070224
PG 14
WC Business; Computer Science, Artificial Intelligence; Computer Science,
Theory & Methods
SC Business & Economics; Computer Science
GA BJR17
UT WOS:000267019100005
ER
PT J
AU Schreiber, BT
Bennett, W
Colegrove, CM
Portrey, AM
Greschke, DA
Bell, HH
AF Schreiber, Brian T.
Bennett, Winston, Jr.
Colegrove, Charles M.
Portrey, Antoinette M.
Greschke, David A.
Bell, Herbert H.
BE Ericsson, KA
TI Evaluating Pilot Performance
SO DEVELOPMENT OF PROFESSIONAL EXPERTISE: TOWARD MEASUREMENT OF EXPERT
PERFORMANCE AND DESIGN OF OPTIMAL LEARNING ENVIRONMENTS
LA English
DT Article; Book Chapter
C1 [Schreiber, Brian T.] Lumir Res Inst, Grayslake, IL USA.
[Portrey, Antoinette M.] Lockheed Martin, Mesa, AZ USA.
[Greschke, David A.] Gen Dynam Informat Technol, Mesa, AZ USA.
[Bennett, Winston, Jr.; Bell, Herbert H.] USAF, Res Lab, Warfighter Readiness Res Div, Mesa, AZ USA.
[Colegrove, Charles M.] Alion Sci & Technol, Langley AFB, VA USA.
RP Schreiber, BT (reprint author), Lumir Res Inst, Grayslake, IL USA.
NR 43
TC 1
Z9 1
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51846-8
PY 2009
BP 247
EP 270
DI 10.1017/CBO9780511609817.014
D2 10.1017/CBO9780511609817
PG 24
WC Psychology, Applied
SC Psychology
GA BBL53
UT WOS:000307283800011
ER
PT S
AU Cheng, ZQ
Robinette, K
AF Cheng, Zhiqing
Robinette, Kathleen
BE Duffy, VG
TI Static and Dynamic Human Shape Modeling
SO DIGITAL HUMAN MODELING, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 2nd International Conference on Digital Human Modeling held at the HCI
International 2009
CY JUL 19-24, 2009
CL San Diego, CA
DE Human body; shape modeling; pose; animation
ID SKIN DEFORMATION
AB Recent developments in static human shape modeling based on range scan data and dynamic human shape modeling from video imagery are reviewed. The topics discussed include shape description, surface registration, hole Filling, shape characterization, and shape reconstruction for static modeling and pose identification, skeleton modeling, shape deformation, motion tracking, dynamic shape capture and reconstruction, and animation for dynamic modeling. A new method for human shape modeling is introduced.
C1 [Cheng, Zhiqing] Infoscitex Corp, 4027 Colonel Glenn Highway,Suite 210, Dayton, OH 45431 USA.
[Robinette, Kathleen] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Cheng, ZQ (reprint author), Infoscitex Corp, 4027 Colonel Glenn Highway,Suite 210, Dayton, OH 45431 USA.
EM zhiqing.cheng@wpafb.af.mil; kathleen.robinette@wpafb.af.mil
NR 30
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-642-02808-3
J9 LECT NOTES COMPUT SC
PY 2009
VL 5620
BP 3
EP +
PG 4
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Computer Science, Theory & Methods; Imaging Science &
Photographic Technology
SC Computer Science; Imaging Science & Photographic Technology
GA BKR86
UT WOS:000269037100001
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI What makes humans special?
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
ID OBSESSIVE-COMPULSIVE DISORDER; ATTENTION-DEFICIT HYPERACTIVITY;
NUCLEUS-ACCUMBENS DOPAMINE; GROWTH-HORMONE DEFICIENCY; MODERN
HUMAN-BEHAVIOR; EARLY-TREATED PHENYLKETONURIA; FRONTAL-SUBCORTICAL
CIRCUITS; GENERAL FLUID INTELLIGENCE; AUTISM SPECTRUM DISORDERS;
PROGRESSIVE MATRICES TEST
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 595
TC 0
Z9 0
U1 2
U2 3
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 1
EP +
D2 10.1017/CBO9780511581366
PG 53
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000001
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI Dopamine in the brain
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 19
EP 36
DI 10.1017/CBO9780511581366.002
D2 10.1017/CBO9780511581366
PG 18
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000002
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI Dopamine and behavior
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 37
EP 74
DI 10.1017/CBO9780511581366.003
D2 10.1017/CBO9780511581366
PG 38
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000003
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI Dopamine and mental health
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 75
EP 100
DI 10.1017/CBO9780511581366.004
D2 10.1017/CBO9780511581366
PG 26
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000004
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI Evolution of the dopaminergic mind
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 101
EP 122
DI 10.1017/CBO9780511581366.005
D2 10.1017/CBO9780511581366
PG 22
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000005
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI The dopaminergic mind in history
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 123
EP 154
DI 10.1017/CBO9780511581366.006
D2 10.1017/CBO9780511581366
PG 32
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000006
ER
PT J
AU Previc, FH
AF Previc, Fred H.
BA Previc, FH
BF Previc, FH
TI Relinquishing the dopaminergic imperative
SO DOPAMINERGIC MIND IN HUMAN EVOLUTION AND HISTORY
LA English
DT Article; Book Chapter
C1 [Previc, Fred H.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Previc, FH (reprint author), Eleanor Kolitz Acad, San Antonio, TX 78231 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-51699-0
PY 2009
BP 155
EP 172
DI 10.1017/CBO9780511581366.007
D2 10.1017/CBO9780511581366
PG 18
WC Evolutionary Biology; Neurosciences; Psychology
SC Evolutionary Biology; Neurosciences & Neurology; Psychology
GA BDR77
UT WOS:000314589000007
ER
PT B
AU Jordan, JL
White, B
Spowart, JE
Thadhani, NN
Richards, DW
AF Jordan, J. L.
White, B.
Spowart, J. E.
Thadhani, N. N.
Richards, D. W.
GP EDPS
TI Static and dynamic mechanical properties of epoxy-based
multi-constituent particulate composites
SO DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL
BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 1
LA English
DT Proceedings Paper
CT 9th International Conference on Mechanical and Physical Behaviour of
Materials under Dynamic Loading
CY SEP 07-11, 2009
CL Royal Mil Acad, Brussels, BELGIUM
HO Royal Mil Acad
ID PARTICLE-MATRIX ADHESION; GLASS FILLED EPOXIES; BEHAVIOR
CHARACTERIZATION; YIELD
AB Multi-phase particulate composites consist of individual particles of more than one material dispersed throughout and held together by a polymer binder. The mechanical and physical properties of the composite depend on the properties of the individual components; their loading density; the shape and size of the particles; the interfacial adhesion; residual stresses; and matrix porosity. These multi-phase particulate composites systems, particularly those with high fill densities, have not typically been studied to determine the effects of microstructural features on properties. In this paper, we present our investigation of the influence of particle size and dispersion on the static and dynamic mechanical response of these multi-phase (n > 2) polymer-metal composites. The low and high strain rate compressive strengths are determined using an MTS load frame and a split Hopkinson pressure bar, respectively, and the elastic properties were studied using dynamic mechanical analysis. The results are analyzed using a factorial design of experiments to determine the effect of aluminum and nickel volume percent and aluminum particle size on the compressive strength as a function of strain rate.
C1 [Jordan, J. L.; Richards, D. W.] USAF, Res Lab, AFRL RWME, Eglin AFB, FL 32542 USA.
RP Jordan, JL (reprint author), USAF, Res Lab, AFRL RWME, Eglin AFB, FL 32542 USA.
NR 14
TC 0
Z9 0
U1 0
U2 2
PU E D P SCIENCES
PI CEDEX A
PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A,
FRANCE
BN 978-2-7598-0472-6
PY 2009
BP 19
EP 25
DI 10.1051/dymat/2009003
PG 7
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA BMO55
UT WOS:000273127300003
ER
PT B
AU Martin, B
Chen, W
AF Martin, B.
Chen, W.
GP EDPS
TI Response of moist sand to high rate loading
SO DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL
BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 1
LA English
DT Proceedings Paper
CT 9th International Conference on Mechanical and Physical Behaviour of
Materials under Dynamic Loading
CY SEP 07-11, 2009
CL Royal Mil Acad, Brussels, BELGIUM
HO Royal Mil Acad
ID SOFT SOILS
AB The dynamic response of sand has predominately been characterized at dry and saturated conditions, but much less studied at moist or partially saturated conditions. This work is to aid in better understanding the dynamic behavior of partially saturated sand. In particular, the effects of moisture on the dynamic behavior of poorly graded, silica based sand are explored using a modified Kolsky bar. A controlled loading pulse (pulse shaping) allowed the sample to acquire stress equilibrium and a constant strain-rate. The experiments were conducted at strain-rates of 900 s(-1) and 1500 s(-1) with the sand specimen passively confined in a hardened steel tube. The sand has a dry density of 1.50 g/cm(3) with its moisture contents varying from 0% to 9% by weight. Experimental results indicate that partially saturated sand is more compliant than dry sand. The softening of the partially saturated sand may occur due to the pore water acting as a lubricant between the sand particles.
C1 [Martin, B.] USAF, Res Lab, Eglin AFB, FL 32542 USA.
RP Martin, B (reprint author), USAF, Res Lab, Eglin AFB, FL 32542 USA.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU E D P SCIENCES
PI CEDEX A
PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A,
FRANCE
BN 978-2-7598-0472-6
PY 2009
BP 201
EP 206
DI 10.1051/dymat/2009027
PG 6
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA BMO55
UT WOS:000273127300027
ER
PT B
AU Nixon, ME
Cazacu, O
House, J
AF Nixon, M. E.
Cazacu, O.
House, J.
GP EDPS
TI Strain rate effects on the mechanical properties of high-purity
alpha-titanium
SO DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL
BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2
LA English
DT Proceedings Paper
CT 9th International Conference on Mechanical and Physical Behaviour of
Materials under Dynamic Loading
CY SEP 07-11, 2009
CL Royal Mil Acad, Brussels, BELGIUM
HO Royal Mil Acad
AB A comprehensive experimental study of strain rate effects on the deformation of high-purity, polycrystalline alpha-titanium plate is presented. Monotonic uniaxial compression and tension tests were carried out at room temperature under quasi-static conditions to quantify the plastic anisotropy and the tension-compression symmetry of the material. To characterize the material's strain rate sensitivity Split Hopkinson Pressure Bar tests at strain rates of 400 to 600/s were performed along the symmetry axes of the material. It was observed that for both quasi-static and dynamic loading the response is dependent on the orientation of the loading with respect to the < c > axis of the grains. A clear increase in strength with increasing strain rate was observed during loading in the rolling direction, whereas the hardening rate remains practically unchanged for all the other orientations.
C1 [Nixon, M. E.; House, J.] USAF, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
[Cazacu, O.] Univ Florida, REEF, Dept Mech & Aerosp Engn, Shalimar 32579, FL USA.
RP Nixon, ME (reprint author), USAF, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
FU U.S.Air Force [FA 8651-05-1-0005]
FX The experimental quasistatic tests were conducted at Los Alamos National
Laboratory. High rate experiments were conducted at the Air Force
Research Laboratory Munitions Directorate at Eglin AFB, FL.The input and
help provided by Dr. R. A. Lebensohn, M. Lovato, Philip Flater and
Richard Harris are gratefully acknowledged. O. Cazacu acknowledges the
partial support for this work provided by the U.S.Air Force under grant
FA 8651-05-1-0005.
NR 3
TC 1
Z9 1
U1 0
U2 1
PU E D P SCIENCES
PI CEDEX A
PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A,
FRANCE
BN 978-2-7598-0473-3
PY 2009
BP 1161
EP +
DI 10.1051/dymat/2009162
PG 2
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA BMO56
UT WOS:000273128000032
ER
PT J
AU Brissett, W
AF Brissett, Wilson
TI Edward Taylor's Public Devotions
SO EARLY AMERICAN LITERATURE
LA English
DT Article
ID PURITAN; TAYLOR,EDWARD; PSALMS; POETRY
C1 USAF Acad, Colorado Springs, CO 80840 USA.
RP Brissett, W (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 41
TC 1
Z9 1
U1 0
U2 2
PU UNIV NORTH CAROLINA PRESS
PI CHAPEL HILL
PA BOX 2288, JOURNALS DEPT, CHAPEL HILL, NC 27515-2288 USA
SN 0012-8163
J9 EARLY AM LITERATURE
JI Early Am. Lit.
PY 2009
VL 44
IS 3
BP 457
EP 487
PG 31
WC Literature, American
SC Literature
GA 518MF
UT WOS:000271696000002
ER
PT J
AU Hameed, S
Norwood, HH
Flanagan, M
Feldstein, S
Yang, CH
AF Hameed, Sultan
Norwood, Henry H.
Flanagan, Michael
Feldstein, Steven
Yang, Chien-hsiung
TI EARTH Interactions
SO EARTH INTERACTIONS
LA English
DT Article
DE Bird migration; ENSO; Aleutian birds; Attu
ID EL-NINO; PATTERNS
AB Several studies have documented the effect of the recent secular climate warming on the distributions and geographical ranges of birds. Here the authors report the strong impact of a recurring climatic pattern in the equatorial Pacific, the El Nino-Southern Oscillation (ENSO) cycle of warm (El Nino) and cold (La Nina) events, on spring migrants along the Far Eastern flyway in northeast Asia. In El Nino years, an unusually large number of birds that use the flyway are observed at Attu Island, westernmost of the Aleutian Islands, nearly 960 km away from the Asian coast. This study is based on a 20-yr dataset documenting the year-to-year variation of Asian birds arriving on Attu in the spring season and uses a three-phased analytical methodology to examine climate impacts on bird movements and populations.
The authors offer evidence that birds are displaced toward the Attu area in strong eastward-moving storms. They also present results from a reverse trajectory model that was used to simulate trajectories that a sample of Attu arrivals likely followed in reaching the island. In a statistical analysis, it is shown that 79% of the variation of the Asian birds is explained by a single climate variable: sea surface temperature in the eastern equatorial Pacific in the previous fall. It is the rise in sea surface temperature in this region, more than 8000 km from Attu, that characterizes the onset of an El Nino episode.
Examining those years for which there was a strong ENSO signal in the fall, it is found that the following May is characterized by anomalously strong westerly winds in the northwest Pacific, conditions that are appropriate for large Asian bird fallouts at Attu. Because of the time lag between the fall sea surface temperatures in the El Nino region and the spring Asian bird count at Attu, and the strong correlation between these two quantities, the number of Asian birds arriving at Attu in spring is predictable in the previous autumn. Such predictions are presented for several years.
C1 [Hameed, Sultan; Flanagan, Michael] SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA.
[Feldstein, Steven] Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA.
[Yang, Chien-hsiung] USAF, Voluntary Emeritus Corps, Res Lab, Hanscom AFB, Bedford, MA USA.
RP Hameed, S (reprint author), SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA.
EM shameed@notes.cc.sunysb.edu
NR 10
TC 1
Z9 1
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1087-3562
J9 EARTH INTERACT
JI Earth Interact.
PY 2009
VL 13
AR 7
DI 10.1175/2009EI272.1
PG 22
WC Geosciences, Multidisciplinary
SC Geology
GA 488GJ
UT WOS:000269336900001
ER
PT J
AU Sukeshini, AM
Cummins, R
Reitz, TL
Miller, RM
AF Sukeshini, A. M.
Cummins, R.
Reitz, T. L.
Miller, R. M.
TI Inkjet Printing of Anode Supported SOFC: Comparison of Slurry Pasted
Cathode and Printed Cathode
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID OXIDE FUEL-CELLS; AIR CATHODES; ELECTROLYTE; STACKS
AB Solid oxide fuel cells (SOFCs) were fabricated by depositing NiO/yttria-stabilized zirconia (YSZ) anode interlayer, YSZ electrolyte layer, and strontium-doped lanthanum manganate (LSM)-YSZ and LSM cathode layers on a NiO-YSZ support using an inkjet printing method with potential for high reproducibility and design flexibility. The cells exhibited a stable open-circuit voltage of 1.1 V and a maximum power density of 430-460 mW/cm(2) at 850 degrees C for hydrogen. For comparison, cells similar in all respects except for utilizing conventional hand-pasted slurry for the cathode layers, were tested and shown to have similar electrochemical performance. Altering the rheological property of the ink and/or the printing process parameter altered the microstructure of printed layers. (C) 2009 The Electrochemical Society. [DOI:10.1149/1.3243468] All rights reserved.
C1 [Sukeshini, A. M.; Cummins, R.] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45430 USA.
[Reitz, T. L.; Miller, R. M.] USAF, Prop Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sukeshini, AM (reprint author), Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45430 USA.
EM mary.ayyadurai.ctr@wpafb.af.mil
NR 19
TC 10
Z9 10
U1 5
U2 23
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2009
VL 12
IS 12
BP B176
EP B179
DI 10.1149/1.3243468
PG 4
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 508FR
UT WOS:000270915300008
ER
PT S
AU Nalladega, V
Sathish, S
Jata, K
Blodgett, M
Knopp, J
AF Nalladega, Vijayaraghava
Sathish, Shamachary
Jata, Kumar
Blodgett, Mark
Knopp, Jeremy
BE Shin, YK
Lee, HB
Song, SJ
TI High resolution Eddy Current Atomic Force Microscopy: Development,
Theoretical Modeling and Application
SO ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XII)
SE Studies in Applied Electromagnetics and Mechanics
LA English
DT Proceedings Paper
CT 13th International Workshop on Electromagnetic Nondestructive Evaluation
(ENDE)
CY JUN 10-12, 2008
CL Seoul Educ & Culture Ctr, Seoul, SOUTH KOREA
SP Sungkyunkwan Univ, Soongsil Univ, Kunsan Natl Univ, Korea Inst Mat Sci, Doosan Heavy Ind & Construct, NAWOO Tech Res Ltd, Adv NDE Serv Corp, Energy Syst Corp, Zetec Inc, Korea Gas Corp, Adv Inst Qual & Safety, RAYNAR Corp, FRONTICS Inc, Jaewoo Technol Corp
HO Seoul Educ & Culture Ctr
DE eddy currents; conductivity; atomic force microscopy
ID PLATES
AB This paper describes the development of a high resolution eddy current imaging system by combining the basic principles of conventional eddy current and an atomic force microscope (AFM). The eddy currents are generated by exciting a small coil, placed under an electrically conductive sample, with a low frequency electromagnetic signal. The eddy currents through the sample are detected by a magnetic film coated AFM tip-cantilever. The force between the coil and the magnetic tip, with and without the electrically conductive sample, is related to the electrical conductivity, at that location in the sample. The images of the electrical conductivity variations in the sample are obtained by scanning the sample with a magnetic film coated tip. Eddy current images of metal, composite, and nano-composites are presented. A theoretical model developed to evaluate the response of the magnetic film coated AFM tip under the eddy current excitation is described. The results obtained on simple metals are compared with the theoretical model. The model is used to interpret in general the observed contrast and features in different materials.
C1 [Nalladega, Vijayaraghava; Sathish, Shamachary] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Jata, Kumar; Blodgett, Mark; Knopp, Jeremy] AFRL, RXLP, Ceram & NDE Branch, Wright Patterson AFB, OH 45433 USA.
[Nalladega, Vijayaraghava] Univ Dayton, Dept Mech & Aerosp Engn, Dayton, OH 45469 USA.
RP Nalladega, V (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM vijayanz@notes.udayton.edu
FU Dayton Area Graduate Studies Institute ( DAGSI); Air Force [F33615- 03-
3- 9001]; NDE Branch; AFRL/ MLLP; AFB [F33615- 03- C- 5219]
FX V. Nalladega acknowledges Dayton Area Graduate Studies Institute (
DAGSI) and the Air Force contract F33615- 03- 3- 9001 for financial
support. S. Sathish acknowledges the NDE Branch, AFRL/ MLLP, Wright
Patterson AFB for financial support through contract No. F33615- 03- C-
5219. The authors would like to acknowledge Richard Reibel ( UDRI) for
his help with instrumentation.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1383-7281
BN 978-1-60750-442-9; 978-1-60750-023-0
J9 STUD APPL ELECTROMAG
PY 2009
VL 32
BP 115
EP 122
DI 10.3233/978-1-60750-023-0-115
PG 8
WC Mechanics; Physics, Applied
SC Mechanics; Physics
GA BB2SQ
UT WOS:000342281500018
ER
PT S
AU Knopp, JS
Aldrin, JC
Sabbagh, HA
Jata, KV
AF Knopp, Jeremy S.
Aldrin, John C.
Sabbagh, Harold A.
Jata, Kumar V.
BE Shin, YK
Lee, HB
Song, SJ
TI Estimation Theory Metrics in Electromagnetic NDE
SO ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XII)
SE Studies in Applied Electromagnetics and Mechanics
LA English
DT Proceedings Paper
CT 13th International Workshop on Electromagnetic Nondestructive Evaluation
(ENDE)
CY JUN 10-12, 2008
CL Seoul Educ & Culture Ctr, Seoul, SOUTH KOREA
SP Sungkyunkwan Univ, Soongsil Univ, Kunsan Natl Univ, Korea Inst Mat Sci, Doosan Heavy Ind & Construct, NAWOO Tech Res Ltd, Adv NDE Serv Corp, Energy Syst Corp, Zetec Inc, Korea Gas Corp, Adv Inst Qual & Safety, RAYNAR Corp, FRONTICS Inc, Jaewoo Technol Corp
HO Seoul Educ & Culture Ctr
DE eddy current; parameter estimation; Cramer-Rao; Fisher information
ID INVERSION; CRACKS; MODEL
AB There is a need in the development and validation of inverse methods for NDE inspection problems to demonstrate capability using quantitative performance metrics. An overview of metrics is presented addressing the condition of the ill-posed problem, the quality of feature extraction algorithms, and performance of inversion algorithms. In particular, the relationship between metrics found in estimation theory, linear algebra and statistics are presented including Fisher Information, Cramer-Rao Lower Bound (CRLB), covariance, singular value decomposition (SVD), and variance inflation factors (VIFs). The connections and utility of these metrics are illustrated through examples of estimating material loss (thickness), conductivity, and lift-off.
C1 [Knopp, Jeremy S.; Jata, Kumar V.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Aldrin, John C.] Computat Tools, Oak Ridge, TN USA.
[Sabbagh, Harold A.] Victor Technol LLC, Victor, NY USA.
RP Knopp, JS (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Jeremy.Knopp@WPAFB.AF.MIL
FU Air Force Office of Scientific Research
FX Funding was provided by the Air Force Office of Scientific Research.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1383-7281
BN 978-1-60750-442-9; 978-1-60750-023-0
J9 STUD APPL ELECTROMAG
PY 2009
VL 32
BP 321
EP 328
DI 10.3233/978-1-60750-023-0-321
PG 8
WC Mechanics; Physics, Applied
SC Mechanics; Physics
GA BB2SQ
UT WOS:000342281500044
ER
PT S
AU Jakubiak, R
Tondiglia, VP
Natarajan, LV
Lloyd, PF
Sutherland, R
Vaia, RA
Bunning, TJ
AF Jakubiak, Rachel
Tondiglia, Vincent P.
Natarajan, Lalgudi V.
Lloyd, Pamela F.
Sutherland, Richard
Vaia, Richard A.
Bunning, Timothy J.
BE Chien, LC
Wu, MH
TI Lasing of Pyrromethene 597 in 2-D Holographic Polymer Dispersed Liquid
Crystals: Influence of Columnar Conformation
SO EMERGING LIQUID CRYSTAL TECHNOLOGIES IV
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Emerging Liquid Crystal Technologies IV
CY JAN 25-28, 2009
CL San Jose, CA
SP SPIE
DE holography; H-PDLCs; organic lasers
ID 3-DIMENSIONAL PHOTONIC CRYSTALS; VELOCITY ANOMALY PECULIAR;
DISTRIBUTED-FEEDBACK; LIGHT AMPLIFICATION; LASER
AB Holographic photopolymerization, such as used to form holographic polymer dispersed liquid crystals (H-PDLCs), has the advantage of combining the desirable processing properties of polymers with a periodic distribution of an electrically tunable medium (LC). Herein we describe laser oscillations resulting from distributed feedback in field-modulated, 2-D H-PDLC photonic crystals. Compared to results of lasing from pyrromethene 597 in 1-D H-PDLCs, the linewidth of the laser action decreases by at least a factor of four and the lasing wavelength is electrically tunable over 5 nm. The 2-D H-PDLCs consist of LC columns within a polymer matrix that were created by interference of four writing beams on the sample cell. Two configurations were studied; one comprising a reflection grating orthogonal to a transmission grating (in-plane) and the other from two orthogonal transmission gratings (out-of-plane). Given that the lattice spacing was the same for both samples, the lasing wavelengths were similar; however the polarization dependence on lasing threshold varied by a factor of three for the in-plane configuration and electrical switching resulted in bimodal lasing. The out-of-plane geometry showed no polarization dependence on lasing threshold and the lasing blue-shifted with applied electric field.
C1 [Jakubiak, Rachel; Tondiglia, Vincent P.; Natarajan, Lalgudi V.; Lloyd, Pamela F.; Sutherland, Richard; Vaia, Richard A.; Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Jakubiak, R (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 16
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7478-0
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7232
AR 72320K
DI 10.1117/12.810496
PG 6
WC Chemistry, Physical; Crystallography; Optics; Physics, Applied
SC Chemistry; Crystallography; Optics; Physics
GA BST81
UT WOS:000285776600016
ER
PT J
AU Yamada, T
Graham, JL
Minus, DK
AF Yamada, Takahiro
Graham, John L.
Minus, Donald K.
TI Density Functional Theory Investigation of the Interaction between
Nitrile Rubber and Fuel Species
SO ENERGY & FUELS
LA English
DT Article
ID HYDROGEN-BONDS; AB-INITIO; DFT; COMPLEXES
AB The interactions between a nitrile rubber O-ring model polymer and selected fuel species were investigated using one of the hybrid density functional theories (DFT), B3LYP. The primary objective of this study was to examine whether theoretical investigation can be used as a potential tool to predict the intensity of the polymer-fuel species interaction, namely, swelling, and if so, which calculated properties have a strong correlation with experimentally observed swelling behavior. The fuel species investigated were ethylbenzene, phenol, methylphenol, phenylmethanol, phenylethanol, phenylbutanol, 1-butanol, 1-hexanol, cyclohexanol, and di- and triethylene glycol monomethyl ether (diEGME and triEGME, respectively). The model polymer created to represent the nitrile rubber O-ring was cis-butadiene-acrylonitrile-trans-butadiene (cis-C4H7-CH2CHCN-trans-C4H7). The properties investigated were charge distribution, intermolecular distances, binding energies, and vibrational frequency shifts corresponding to the cyano group stretching mode of the model polymers because of the interaction. Some of the cyano group vibrational frequency shifts were compared to an experimentally observed infrared absorption peak shift associated with the nitrile rubber cyano group because of polymer-fuel species interactions. There is a strong correlation among calculated intermolecular distances, binding energies, and frequency shifts. The order of interaction intensities between polymer and fuel species based on the calculated parameters is also consistent with the order of interaction intensities based on the experimentally derived partition and swelling coefficients. The B3LYP/6-311G(d,p) derived vibrational frequency shift associated with the cyano group stretching mode showed good agreement with the experimentally measured adsorption peak shift.
C1 [Minus, Donald K.] USAF, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
[Yamada, Takahiro; Graham, John L.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Yamada, T (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
EM takahiro.yamada@udri.udayton.edu
FU Air Force Research Laboratory [F33615-03-2-2347]
FX This paper is based on research sponsored by the Air Force Research
Laboratory under Agreement F33615-03-2-2347 (Technical Monitor, Mr.
Robert W. Morris, Jr.).
NR 15
TC 0
Z9 0
U1 0
U2 9
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 JAN-FEB
PY 2009
VL 23
IS 1
BP 443
EP 450
DI 10.1021/ef8006189
PG 8
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 411ED
UT WOS:000263629900062
ER
PT J
AU Phillips, J
Newman, AM
Walls, MR
AF Phillips, Julia
Newman, Alexandra M.
Walls, Michael R.
TI UTILIZING A VALUE OF INFORMATION FRAMEWORK TO IMPROVE ORE COLLECTION AND
CLASSIFICATION PROCEDURES
SO ENGINEERING ECONOMIST
LA English
DT Article
AB This case study utilizes a value of information decision framework to provide mine managers guidance regarding the purchase of ore grade scanners. LKAB's Kiruna mine produces three types of iron ore to meet long-term contractual agreements on a monthly basis. There is a priori uncertainty regarding the ore type in any given mineable section of the orebody. In addition, there is extracted ore type uncertainty that is introduced by the mining process. These uncertainties are better understood by obtaining more precise (real-time) information. In addition, a better understanding of the uncertainties can improve the quality of operational decisions and increase the overall profitability of the mine. This case study provides a framework for measuring the economic impact of information purchases in a mining context and discusses the implications of those findings.
C1 [Newman, Alexandra M.; Walls, Michael R.] Colorado Sch Mines, Div Econ & Business, Golden, CO 80419 USA.
[Phillips, Julia] USAF Acad, Dept Math Sci, Colorado Springs, CO USA.
RP Newman, AM (reprint author), Colorado Sch Mines, Div Econ & Business, Golden, CO 80419 USA.
EM anewman@mines.edu
NR 24
TC 5
Z9 6
U1 0
U2 5
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0013-791X
J9 ENG ECON
JI Eng. Econ.
PY 2009
VL 54
IS 1
BP 50
EP 74
DI 10.1080/00137910802711883
PG 25
WC Business; Engineering, Industrial; Management; Operations Research &
Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA V19YG
UT WOS:000208107100003
ER
PT J
AU Finomore, V
Matthews, G
Shaw, T
Warm, J
AF Finomore, V.
Matthews, G.
Shaw, T.
Warm, J.
TI Predicting vigilance: A fresh look at an old problem
SO ERGONOMICS
LA English
DT Review
DE vigilance; individual differences; personality; personnel selection
ID SUSTAINED-ATTENTION TASK; INDIVIDUAL-DIFFERENCES; COGNITIVE FAILURES;
SLEEP-DEPRIVATION; RESOURCE AVAILABILITY; ADHD SYMPTOMATOLOGY; MULTIPLE
RESOURCES; BOREDOM PRONENESS; WORKLOAD HISTORY; WORKING-MEMORY
AB Individual differences in vigilance are ubiquitous and relevant to a variety of work environments in industrial, transportation, medical and security settings. Despite much previous work, mostly on personality traits, it remains difficult to identify vigilant operators. This paper reviews recent research that may point towards practically useful predictor variables for vigilance. Theoretical approaches to identifying predictors that accommodate the heterogeneous nature of vigilance tasks are compared. The article surveys recent empirical studies using personality measures, ability tests and scales for stress and coping as predictors of vigilance. Promising new constructs include trait scales linked to fatigue, abnormal personality and the stress state of task engagement. Implications of the data reviewed for occupational selection are discussed. Selection should be based on a multivariate assessment strategy, cognitive task analysis of the operational vigilance task and use of work sample measures to capture typical stress responses to the task. This review paper surveys recent research that may point towards practically useful predictor variables for vigilance. The article surveys recent empirical studies using personality measures, ability tests and scales for stress and coping as predictors of vigilance. Selection should be based on a multivariate assessment strategy.
C1 [Finomore, V.; Warm, J.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Matthews, G.; Shaw, T.] Univ Cincinnati, Cincinnati, OH USA.
RP Finomore, V (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM victor@finomore.com
FU Army Research Institute [W74V8H-06-C-0049, 06-S-1003]; JXT Corporation;
Army Medical Research and Material Command [W81XWH-04-C-0002]
FX This research was supported, in part, by Contract W74V8H-06-C-0049
subcontract 06-S-1003 from the Army Research Institute and the JXT
Corporation and by Contract W81XWH-04-C-0002 from the Army Medical
Research and Material Command. The views, opinions and/or findings
contained in this report are those of the author(s) and should not be
construed as an official Department of the Army position, policy or
decision unless so designated by other documentation. In the conduct of
research under the mentioned contracts where humans were the subjects,
the investigator(s) adhered to the policies regarding the protection of
human subjects as prescribed by 45 CFR 46 and 32 CFR 219 (Protection of
Human Subjects).
NR 152
TC 34
Z9 34
U1 4
U2 38
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0014-0139
J9 ERGONOMICS
JI Ergonomics
PY 2009
VL 52
IS 7
BP 791
EP 808
DI 10.1080/00140130802641627
PG 18
WC Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology
SC Engineering; Psychology
GA 462QN
UT WOS:000267370800003
PM 19562590
ER
PT J
AU Shen, LX
Suter, BW
AF Shen, Lixin
Suter, Bruce W.
TI Bounds for Eigenvalues of Arrowhead Matrices and Their Applications to
Hub Matrices and Wireless Communications
SO EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING
LA English
DT Article
AB This paper considers the lower and upper bounds of eigenvalues of arrow-head matrices. We propose a parameterized decomposition of an arrowhead matrix which is a sum of a diagonal matrix and a special kind of arrowhead matrix whose eigenvalues can be computed explicitly. The eigenvalues of the arrowhead matrix are then estimated in terms of eigenvalues of the diagonal matrix and the special arrowhead matrix by using Weyl's theorem. Improved bounds of the eigenvalues are obtained by choosing a decomposition of the arrowhead matrix which can provide best bounds. Some applications of these results to hub matrices and wireless communications are discussed. Copyright (C) 2009 L. Shen and B. W. Suter.
C1 [Suter, Bruce W.] USAF, Res Lab, RITC, Rome, NY 13441 USA.
[Shen, Lixin] Syracuse Univ, Dept Math, Syracuse, NY 13244 USA.
RP Suter, BW (reprint author), USAF, Res Lab, RITC, Rome, NY 13441 USA.
EM bruce.suter@rl.af.mil
FU Air Force Visiting Summer Faculty Program; US National Science
Foundation [DMS-0712827]
FX The research was supported by the Air Force Visiting Summer Faculty
Program and by the US National Science Foundation under Grant
DMS-0712827.
NR 15
TC 2
Z9 2
U1 0
U2 2
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-6172
J9 EURASIP J ADV SIG PR
JI EURASIP J. Adv. Signal Process.
PY 2009
AR 379402
DI 10.1155/2009/379402
PG 12
WC Engineering, Electrical & Electronic
SC Engineering
GA 538YI
UT WOS:000273219900001
ER
PT J
AU Husain, SI
Yuan, JH
Zhang, J
Martin, RK
AF Husain, Syed Imtiaz
Yuan, Jinhong
Zhang, Jian
Martin, R. K.
TI Time Domain Equalizer Design Using Bit Error Rate Minimization for UWB
Systems
SO EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
LA English
DT Article
ID DISCRETE MULTITONE TRANSCEIVERS; LIKELIHOOD SEQUENCE ESTIMATION;
MULTICARRIER SYSTEMS; ALGORITHM; CHANNELS; BLIND
AB Ultra-wideband (UWB) communication systems occupy huge bandwidths with very low power spectral densities. This feature makes the UWB channels highly rich in resolvable multipaths. To exploit the temporal diversity, the receiver is commonly implemented through a Rake. The aim to capture enough signal energy to maintain an acceptable output signal-to-noise ratio (SNR) dictates a very complicated Rake structure with a large number of fingers. Channel shortening or time domain equalizer (TEQ) can simplify the Rake receiver design by reducing the number of significant taps in the effective channel. In this paper, we first derive the bit error rate (BER) of a multiuser and multipath UWB system in the presence of a TEQ at the receiver front end. This BER is then written in a form suitable for traditional optimization. We then present a TEQ design which minimizes the BER of the system to perform efficient channel shortening. The performance of the proposed algorithm is compared with some generic TEQ designs and other Rake structures in UWB channels. It is shown that the proposed algorithm maintains a lower BER along with efficiently shortening the channel. Copyright (C) 2009 Syed Imtiaz Husain et al.
C1 [Husain, Syed Imtiaz; Yuan, Jinhong] Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia.
[Zhang, Jian] Australian Natl Univ, Canberra, ACT 0200, Australia.
[Zhang, Jian] NICTA, Canberra Res Labs, Canberra, ACT 2601, Australia.
[Martin, R. K.] USAF, Inst Technol, Kettering, OH 45433 USA.
RP Husain, SI (reprint author), Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia.
EM imtiaz.syed@unsw.edu.au
RI Zhang, Jian (Andrew)/B-7702-2011
NR 23
TC 1
Z9 1
U1 0
U2 1
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-1499
J9 EURASIP J WIREL COMM
JI EURASIP J. Wirel. Commun. Netw.
PY 2009
AR 786291
DI 10.1155/2009/786291
PG 11
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 474AB
UT WOS:000268253500001
ER
PT J
AU Like, E
Chakravarthy, VD
Ratazzi, P
Wu, ZQ
AF Like, Eric
Chakravarthy, Vasu D.
Ratazzi, Paul
Wu, Zhiqiang
TI Signal Classification in Fading Channels Using Cyclic Spectral Analysis
SO EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
LA English
DT Article
ID DIGITAL MODULATION; COGNITIVE RADIO
AB Cognitive Radio (CR), a hierarchical Dynamic Spectrum Access (DSA) model, has been considered as a strong candidate for future communication systems improving spectrum efficiency utilizing unused spectrum of opportunity. However, to ensure the effectiveness of dynamic spectrum access, accurate signal classification in fading channels at low signal to noise ratio is essential. In this paper, a hierarchical cyclostationary-based classifier is proposed to reliably identify the signal type of a wide range of unknown signals. The proposed system assumes no a priori knowledge of critical signal statistics such as carrier frequency, carrier phase, or symbol rate. The system is designed with a multistage approach to minimize the number of samples required to make a classification decision while simultaneously ensuring the greatest reliability in the current and previous stages. The system performance is demonstrated in a variety of multipath fading channels, where several multiantenna-based combining schemes are implemented to exploit spatial diversity. Copyright (C) 2009 Eric Like et al.
C1 [Wu, Zhiqiang] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Like, Eric] USAF, Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH 45433 USA.
[Chakravarthy, Vasu D.] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Ratazzi, Paul] USAF, Res Lab, Informat Directorate, Griffiss AFB, NY 13441 USA.
RP Wu, ZQ (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
EM zhiqiang.wu@wright.edu
FU Dayton Area Graduate Studies Institute ( DAGSI); National Science
Foundation [0708469, 0737297, 0837677]; Wright Center for Sensor System
Engineering; Air Force Research Laboratory
FX This paper is based upon work supported by the Dayton Area Graduate
Studies Institute ( DAGSI), National Science Foundation under Grants no.
0708469, no. 0737297, no. 0837677, the Wright Center for Sensor System
Engineering, and the Air Force Research Laboratory. Any opinions,
findings, and conclusions, or recommendations expressed in this paper
are those of the authors and do not necessarily reflect the views of the
funding agencies.
NR 26
TC 7
Z9 8
U1 0
U2 3
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-1499
J9 EURASIP J WIREL COMM
JI EURASIP J. Wirel. Commun. Netw.
PY 2009
AR 879812
DI 10.1155/2009/879812
PG 14
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 519CV
UT WOS:000271743500001
ER
PT J
AU Weller, GT
AF Weller, Grant T.
TI The King of Karelia: Col PJ Woods and the British Intervention in North
Russia 1918-1919, A History and Memoir.
SO EUROPE-ASIA STUDIES
LA English
DT Book Review
C1 [Weller, Grant T.] USAF Acad, Colorado Springs, CO 80840 USA.
RP Weller, GT (reprint author), USAF Acad, Suite 6F101,2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
EM Grant.weller@usafa.edu
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0966-8136
J9 EUROPE-ASIA STUD
JI Eur.-Asia Stud.
PY 2009
VL 61
IS 4
BP 725
EP 726
PG 2
WC Area Studies; Economics; Political Science
SC Area Studies; Business & Economics; Government & Law
GA 445WY
UT WOS:000266083400016
ER
PT J
AU Corke, TC
Post, ML
Orlov, DM
AF Corke, Thomas C.
Post, Martiqua L.
Orlov, Dmitriy M.
TI Single dielectric barrier discharge plasma enhanced aerodynamics:
physics, modeling and applications
SO EXPERIMENTS IN FLUIDS
LA English
DT Review
ID PRESSURE TURBINE-BLADES; ATMOSPHERIC-PRESSURE; GLOW-DISCHARGE;
SEPARATION CONTROL; SILENT DISCHARGE; ACTUATORS; AIR; NITROGEN; OXYGEN
AB The term "plasma actuator" has been a part of the fluid dynamics flow control vernacular for more than a decade. A particular type of plasma actuator that has gained wide use is based on a single dielectric barrier discharge (SDBD) mechanism that has desirable features for use in air at atmospheric pressures. For these actuators, the mechanism of flow control is through a generated body force vector that couples with the momentum in the external flow. The body force can be derived from first principles and the plasma actuator effect can be easily incorporated into flow solvers so that their placement and operation can be optimized. They have been used in a wide range of applications that include bluff body wake control; lift augmentation and separation control on a variety of lifting surfaces ranging from fixed wings with various degrees of sweep, wind turbine rotors and pitching airfoils simulating helicopter rotors; flow separation and tip-casing clearance flow control to reduce losses in turbines, to control flow surge and stall in compressors; and in exciting instabilities in boundary layers at subsonic to supersonic Mach numbers for turbulent transition control. New applications continue to appear through programs in a growing number of US universities and government laboratories, as well as in Germany, France, England, Netherland, Russia, Japan and China. This paper provides an overview of the physics, design and modeling of SDBD plasma actuators. It then presents their use in a number of applications that includes both numerical flow simulations and experiments together.
C1 [Corke, Thomas C.] Univ Notre Dame, Dept Aerosp & Mech Engn, Ctr Flow Phys & Control, Ctr Flow Phys & Control, Notre Dame, IN 46556 USA.
[Post, Martiqua L.; Orlov, Dmitriy M.] USAF Acad, Colorado Springs, CO 80840 USA.
RP Corke, TC (reprint author), Univ Notre Dame, Dept Aerosp & Mech Engn, Ctr Flow Phys & Control, Ctr Flow Phys & Control, Notre Dame, IN 46556 USA.
EM tcorke@nd.edu
RI Orlov, Dmitriy/D-2406-2016
OI Orlov, Dmitriy/0000-0002-2230-457X
NR 114
TC 103
Z9 108
U1 7
U2 66
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 JAN
PY 2009
VL 46
IS 1
BP 1
EP 26
DI 10.1007/s00348-008-0582-5
PG 26
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 382CT
UT WOS:000261583300001
ER
PT S
AU Shay, TM
Baker, JT
Sanchez, AD
Robin, CA
Vergien, CL
Zerinque, C
Sanchez, AD
Gallant, D
Lu, CA
Pulford, B
Bronder, TJ
Lucero, A
AF Shay, T. M.
Baker, J. T.
Sanchez, Anthony D.
Robin, C. A.
Vergien, C. L.
Zerinque, C.
Sanchez, Anthony D.
Gallant, D.
Lu, Chunte A.
Pulford, Benjamin
Bronder, T. J.
Lucero, Arthur
BE Gapontsev, DV
Kliner, DA
Dawson, JW
Tankala, K
TI High power phase locking of a fiber amplifier array
SO FIBER LASERS VI: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers VI - Technology, Systems, and Applications
CY JAN 26-29, 2009
CL San Jose, CA
SP SPIE, IPG Photon Corp
DE Laser arrays; optical fibers; optical amplifiers; phase locked lasers
ID LASER ARRAY; COHERENT BEAM
AB We report high power phase locked fiber amplifier array using the Self-Synchronous Locking of Optical Coherence by Single-detector Electronic-frequency Tagging technique. We report the first experimental results for a five element amplifier array with a total locked power of more than 725-W. We will report on experimental measurements of the phase fluctuations versus time when the control loop is closed. The rms phase error was measured to be lambda/60. Recent results will be reported. To the best of the authors' knowledge this is the highest fiber laser power to be coherently combined.
C1 [Shay, T. M.; Sanchez, Anthony D.; Robin, C. A.; Vergien, C. L.; Zerinque, C.; Sanchez, Anthony D.; Lu, Chunte A.; Pulford, Benjamin; Bronder, T. J.] USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Shay, TM (reprint author), USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
NR 17
TC 22
Z9 22
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7441-4
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7195
AR 71951M
DI 10.1117/12.809416
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BSS47
UT WOS:000285708800042
ER
PT S
AU Ward, BG
Spring, JB
AF Ward, Benjamin G.
Spring, Justin B.
BE Gapontsev, DV
Kliner, DA
Dawson, JW
Tankala, K
TI Brillouin gain in optical fibers with inhomogeneous acoustic velocity
SO FIBER LASERS VI: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers VI - Technology, Systems, and Applications
CY JAN 26-29, 2009
CL San Jose, CA
SP SPIE, IPG Photon Corp
DE Fiber Optics; Fiber Lasers; Stimulated Brillouin Scattering; Power
Scaling
ID SBS THRESHOLD; SCATTERING; LASER
AB The power available from narrow-linewidth single-transverse-mode fiber amplifiers is primarily limited by the onset of stimulated Brillouin scattering. One approach for increasing the SBS threshold that has shown recent promise is to tailor the acoustic velocity within the fiber cross-section to suppress Brillouin gain.(1-3) Relating the SBS threshold to an acousto-optic effective area has yielded a theory(4) which contradicts experimental measurements that indicate the nonlinear optical effective area of the tested SBS suppressing and Higher Order Mode (HOM) fibers is of primary importance in the nonlinear process.(5) In this work, we present a new formalism for determining the Brillouin gain in fibers with inhomogeneous acoustic velocity which may be implemented with a wide variety of computational methods. We find that the Brillouin gain amplitude and spectrum are independent of the acousto-optic effective area and that they reduce to the bulk result(6,) (7) for conventional step-index fibers. Implementing a finite-element method, we find that an SBS-suppressing design employing a negative focal length acoustic lens(1) exhibits a broadened gain spectrum and reduced gain amplitude relative to step-index fibers. The SBS threshold of this fiber is increased by 8.4 dB relative to a standard large mode area fiber, each with an identical 6 meter length. Designs that further flatten the Brillouin gain spectrum have the potential to further increase the SBS threshold leading to higher single-frequency output power from devices incorporating these fibers.
C1 [Ward, Benjamin G.; Spring, Justin B.] USAF Acad, Dept Phys, HQ USAFA DFP, Colorado Springs, CO 80840 USA.
RP Ward, BG (reprint author), USAF Acad, Dept Phys, HQ USAFA DFP, 2354 Fairchild Dr,Ste 2A167, Colorado Springs, CO 80840 USA.
EM benjamin.ward@usafa.edu
NR 17
TC 0
Z9 0
U1 2
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7441-4
J9 PROC SPIE
PY 2009
VL 7195
AR 71951J
DI 10.1117/12.812882
PG 11
WC Optics; Physics, Applied
SC Optics; Physics
GA BSS47
UT WOS:000285708800040
ER
PT S
AU Zeringue, C
Dajani, I
Lu, CT
Vergien, C
Robin, C
AF Zeringue, Clint
Dajani, Iyad
Lu, Chunte
Vergien, Christopher
Robin, Craig
BE Gapontsev, DV
Kliner, DA
Dawson, JW
Tankala, K
TI Multi-tone approach to SBS mitigation in narrow linewidth high power
fiber amplifiers
SO FIBER LASERS VI: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers VI - Technology, Systems, and Applications
CY JAN 26-29, 2009
CL San Jose, CA
SP SPIE, IPG Photon Corp
DE fiber amplifiers; nonlinear optics; stimulated Brillouin scattering
AB We investigate theoretically multi-tone seeding of high power ytterbium-doped amplifiers using a numerical code that solves a two-point boundary problem. A large wavelength separation among the signals is used leading to efficient transfer of power through laser gain while increasing the stimulated Brillouin scattering threshold in the channel of interest. Two-tone and three-tone seeding configurations are considered. For two-tone seeding, it is shown that a combination of narrow linewidth and broadband signals employed in a co-propagating geometry can achieve the same level of SBS suppression as counter-pumping.
C1 [Zeringue, Clint; Dajani, Iyad; Lu, Chunte; Vergien, Christopher; Robin, Craig] USAF, High Power Solid State Lasers Branch, Res Lab, Kirtland AFB, NM 87117 USA.
RP Zeringue, C (reprint author), USAF, High Power Solid State Lasers Branch, Res Lab, Kirtland AFB, NM 87117 USA.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7441-4
J9 PROC SPIE
PY 2009
VL 7195
AR 71952I
DI 10.1117/12.808054
PG 9
WC Optics; Physics, Applied
SC Optics; Physics
GA BSS47
UT WOS:000285708800068
ER
PT J
AU Jauchem, J
Beason, CW
Cook, MC
AF Jauchem, James
Beason, Charles W.
Cook, Michael C.
TI Acute effects of an alternative electronic-control-device waveform in
swine
SO FORENSIC SCIENCE MEDICINE AND PATHOLOGY
LA English
DT Article
DE Forensic; TASER; Electronic control device; Conducted electrical weapon;
Electro-muscular disruption; Non-lethal weapon; Acidosis; Myoglobinemia
ID TASER X26 DISCHARGES; STUN DEVICE; EMERGENCY-DEPARTMENT; PROCEDURAL
SEDATION; BLOOD; PIGS; PROPOFOL; STRESS; AGENTS; 1ST
AB In previous studies, repeated 5-s exposures of anesthetized pigs to an electronic control device (TASER International's Advanced TASER (R) X26 device) resulted in acidosis and increases in blood electrolytes. In the current study, experiments were performed to investigate the effects of longer continuous exposures to a different electronic-control-device waveform. After intramuscular injection of tiletamine HCl and zolazepam HCl, anesthesia was maintained with propofol infusion. Ten pigs were exposed to either 30- or 60-s applications of an electronic waveform similar to the TASER-X26 device. Transient increases in potassium, and sodium were consistent with previous reports in the literature dealing with studies of muscle stimulation or exercise. Blood pH was significantly decreased after exposure, but subsequently returned to baseline levels. Lactate was highly elevated and remained somewhat increased even after three hrs. Serum myoglobin was increased after exposure and remained elevated for the 3-h follow-up period. Acidosis would appear to be one of the major concerns with long-duration (e.g., several min) exposures over a short period of time. Even with the extremely low pH immediately after exposure, all animals survived. On the basis of these results, further development of useful continuous-exposure electronic control devices is at least feasible, with the caveat that some medical monitoring of subjects may be required.
C1 [Jauchem, James; Beason, Charles W.; Cook, Michael C.] USAF, Res Lab, Brooks City Base, TX 78235 USA.
RP Jauchem, J (reprint author), USAF, Res Lab, 711th Human Performance Wing,8262 Hawks Rd, Brooks City Base, TX 78235 USA.
EM james.jauchem@brooks.af.mil
FU Joint Non-Lethal Weapons Program; U.S. Marine Corps, Quantico, VA
FX We thank William Snyder, DVM, Major, Veterinary Corps, U.S. Army, and
Specialist Nancy Meadows, U.S. Army, for surgically implanting the
jugular venous catheters. We thank Specialist Michael Palmerin, and
Sergeant Bennie Mitchell, U.S. Army, for anesthesia maintenance, and
David Fines and Melissa Tarango, Advanced Information Engineering
Services (A General Dynamics Company), for technical assistance during
the experiments. James Parker and John Ashmore, Advanced Information
Engineering Services, assisted in operation of the electronic
stimulator. This study was funded by the Joint Non-Lethal Weapons
Program, U.S. Marine Corps, Quantico, VA.
NR 36
TC 17
Z9 17
U1 0
U2 2
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 1547-769X
J9 FORENSIC SCI MED PAT
JI Forensic Sci. Med. Pathol.
PY 2009
VL 5
IS 1
BP 2
EP 10
DI 10.1007/s12024-009-9076-x
PG 9
WC Medicine, Legal; Pathology
SC Legal Medicine; Pathology
GA 484GW
UT WOS:000269033100002
PM 19330471
ER
PT J
AU Jauchem, JR
Seaman, RL
Klages, CM
AF Jauchem, James R.
Seaman, Ronald L.
Klages, Curtis M.
TI Physiological effects of the TASER (R) C2 conducted energy weapon
SO FORENSIC SCIENCE MEDICINE AND PATHOLOGY
LA English
DT Article
DE Forensic science; Forensic pathophysiology; TASER; Conducted energy
weapon; Electronic control device; Electro-muscular disruption; Muscle
contraction; Acidosis
ID MUSCLE FORCE PRODUCTION; ELECTRICAL WEAPON; X26 DISCHARGES; BLOOD-FLOW;
MINIATURE SWINE; EXERCISE; CONTRACTIONS; VOLUNTARY; STIMULATION;
EXPOSURE
AB In previous studies, exposure to conducted energy weapons (CEWs) (such as TASER International's Advanced TASER X26 device) resulted in leg muscle contraction, acidosis, increased blood electrolytes, and other biochemical and physiological changes. In the current study, experiments were performed to examine the effects of exposures to TASER International's "C2" CEW, which is specifically marketed to civilian rather than law-enforcement users. Ten pigs (Sus scrofa) were sedated with an intramuscular injection of Telezol (tiletamine HCl and zolazepam HCl) and intubated. General anesthesia was maintained with an IV propofol infusion. Applications of the C2 device for 30 s resulted in extensive muscle contraction and significant increases in heart rate and hematocrit, and in blood levels of pCO(2), lactate, glucose, and potassium, sodium, and calcium ions. Significant decreases were observed in blood oxygen saturation, pO(2), and pH. Qualitatively, many of these changes were consistent with previous reports in the literature dealing with studies of muscle stimulation or exercise. The changes in blood pCO(2), pO(2), electrolytes, lactate, and pH, however, were greater than in a previous study of three repeated 5-s exposures to the X26 CEW commonly used by law-enforcement personnel. On the basis of the results, potential detrimental effects due to use of the "citizen-version" TASER C2 CEW may be more likely than limited intermittent applications of the X26 CEW.
C1 [Jauchem, James R.; Klages, Curtis M.] USAF, Directed Energy Bioeffects Div, Res Lab, AFRL RHDR, San Antonio, TX 78235 USA.
[Seaman, Ronald L.] Gen Dynam Co, Adv Informat Serv, San Antonio, TX 78235 USA.
RP Jauchem, JR (reprint author), USAF, Directed Energy Bioeffects Div, Res Lab, AFRL RHDR, 711th Human Performance Wing,8262 Hawks Rd, San Antonio, TX 78235 USA.
EM james.jauchem@brooks.af.mil
FU Directed Energy Research Programs Department, National Institute of
Justice, Office of Justice Programs, US Department of Justice
FX The authors thank Sergeant Jessica D. Carr, Veterinary Corps, US Army.
for her veterinary technical assistance; and David A. Fines, John L.
Ashmore, and Melissa Tarango, General Dynamics Advanced Information
Systems, for their technical assistance during the experiments.
Responsibilities of the authors are as follows: JRJ conceived the study,
designed the implementation of the study, obtained research funding, and
supervised the overall conduct of the study. CMK was responsible for
veterinary care, animal preparation, and implantation of IV catheters.
RLS performed data collection, statistical analyses of the data, and
production of graphics. JRJ drafted the manuscript, and all authors
contributed substantially to its revision. This work was supported by
the Directed Energy Research Programs Department, National Institute of
Justice, Office of Justice Programs, US Department of Justice.
NR 50
TC 10
Z9 10
U1 1
U2 4
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 1547-769X
J9 FORENSIC SCI MED PAT
JI Forensic Sci. Med. Pathol.
PY 2009
VL 5
IS 3
BP 189
EP 198
DI 10.1007/s12024-009-9100-1
PG 10
WC Medicine, Legal; Pathology
SC Legal Medicine; Pathology
GA 505AU
UT WOS:000270661000005
PM 19598011
ER
PT S
AU Patel, H
Kim, Y
McDonald, JT
Starman, L
AF Patel, Hiren
Kim, Yong
McDonald, J. Todd
Starman, LaVern
BE Danek, M
Kadlec, J
TI INCREASING STABILITY AND DISTINGUISHABILITY OF THE DIGITAL FINGERPRINT
IN FPGAS THROUGH INPUT WORD ANALYSIS
SO FPL: 2009 INTERNATIONAL CONFERENCE ON FIELD PROGRAMMABLE LOGIC AND
APPLICATIONS
SE International Conference on Field Programmable and Logic Applications
LA English
DT Proceedings Paper
CT 19th International Conference on Field Programmable Logic and
Applications
CY AUG 31-SEP 02, 2009
CL ASCR, Informat Theory & Automat, Prague, CZECH REPUBLIC
SP UTIA, AV, CR
HO ASCR, Informat Theory & Automat
AB Field Programmable Gate Arrays (FPGAs) have become increasingly popular in circuit development due to their rapid development times and low costs. With their increased use, the need to protect their Intellectual Property (IP) becomes more urgent. The digital fingerprint accomplishes this by creating a unique identification (ID) for each FPGA. In this research, we propose methods to dramatically increase the stability and robustness of the digital fingerprint ID by the proper choice of input sequences. We also show that by properly choosing the input word, we can significantly increase the DF resistance to operating temperature changes.
C1 [Patel, Hiren] USAF, AF Res Lab, 1940 Allbrook Dr, Wright Patterson AFB, OH 45433 USA.
[Kim, Yong; McDonald, J. Todd; Starman, LaVern] Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Patel, H (reprint author), USAF, AF Res Lab, 1940 Allbrook Dr, Wright Patterson AFB, OH 45433 USA.
EM hiren.patel@us.af.mil; ykim@afit.edu; jmcdonald@afit.edu;
lstarman@afit.edu
NR 9
TC 3
Z9 3
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1946-1488
BN 978-1-4244-3891-4
J9 I C FIELD PROG LOGIC
PY 2009
BP 391
EP +
DI 10.1109/FPL.2009.5272253
PG 2
WC Computer Science, Software Engineering; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BOT08
UT WOS:000277506300060
ER
PT S
AU Porter, R
Stone, SJ
Kim, YC
McDonald, JT
Starman, LA
AF Porter, Roy
Stone, Samuel J.
Kim, Yong C.
McDonald, J. Todd
Starman, LaVern A.
BE Danek, M
Kadlec, J
TI DYNAMIC POLYMORPHIC RECONFIGURATION FOR ANTI-TAMPER CIRCUITS
SO FPL: 2009 INTERNATIONAL CONFERENCE ON FIELD PROGRAMMABLE LOGIC AND
APPLICATIONS
SE International Conference on Field Programmable and Logic Applications
LA English
DT Proceedings Paper
CT 19th International Conference on Field Programmable Logic and
Applications
CY AUG 31-SEP 02, 2009
CL ASCR, Informat Theory & Automat, Prague, CZECH REPUBLIC
SP UTIA, AV, CR
HO ASCR, Informat Theory & Automat
AB The susceptibility of digital systems to tampering is of immense concern to military and commercial organizations. Current defenses against such techniques as reverse engineering and side channel analysis are limited and don't address the underlying vulnerable characteristics of digital circuits. In this paper, we propose a generalized defense methodology named Dynamic Polymorphic Reconfiguration that significantly reduces the probability of successful tampering. We achieve protection through targeted component hiding and the introduction of run-time autonomous defense adaptations. As a result, we establish the feasibility of self-protecting circuits.
C1 [Porter, Roy; Stone, Samuel J.; Kim, Yong C.; McDonald, J. Todd; Starman, LaVern A.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Porter, R (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM roy.porter.2@us.af.mil; samuel.stone@us.af.mil; ykim@afit.edu;
jmcdonal@afit.edu; lstarman@afit.edu
NR 9
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1946-1488
BN 978-1-4244-3891-4
J9 I C FIELD PROG LOGIC
PY 2009
BP 493
EP 497
DI 10.1109/FPL.2009.5272469
PG 5
WC Computer Science, Software Engineering; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BOT08
UT WOS:000277506300080
ER
PT S
AU Siegenthaler, KE
Lawrencet, TJ
AF Siegenthaler, Kenneth E.
Lawrencet, Timothy J.
BE Millis, MG
Davis, EW
TI Null Findings of Yamishita Electrogravitational Patent
SO FRONTIERS OF PROPULSION SCIENCE
SE Progress in Astronautics and Aeronautics
LA English
DT Article; Book Chapter
C1 [Siegenthaler, Kenneth E.] USAF Acad, Dept Astronaut, Colorado Springs, CO 80840 USA.
[Lawrencet, Timothy J.] USAF Acad, Space Syst Res Ctr, Colorado Springs, CO 80840 USA.
RP Siegenthaler, KE (reprint author), USAF Acad, Dept Astronaut, Colorado Springs, CO 80840 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS & ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DR, STE 500, RESTON, VA 20191-4344 USA
SN 0079-6050
BN 978-1-56347-956-4
J9 PROG ASTRONAUT AERON
PY 2009
VL 227
BP 263
EP 291
PG 29
WC Engineering, Aerospace; Astronomy & Astrophysics
SC Engineering; Astronomy & Astrophysics
GA BJU79
UT WOS:000267214100008
ER
PT S
AU Cambier, JL
AF Cambier, Jean-Luc
BE Millis, MG
Davis, EW
TI Inertial Mass from Stochastic Electrodynamics
SO FRONTIERS OF PROPULSION SCIENCE
SE Progress in Astronautics and Aeronautics
LA English
DT Article; Book Chapter
ID BLACKBODY RADIATION SPECTRUM; ZERO-POINT RADIATION; FINITE TEMPERATURE;
VACUUM; FIELD; ACCELERATION; DERIVATION
C1 USAF, Res Lab, Edwards AFB, Prop Directorate,Aerophys Branch, Edwards AFB, CA USA.
RP Cambier, JL (reprint author), USAF, Res Lab, Edwards AFB, Prop Directorate,Aerophys Branch, Edwards AFB, CA USA.
NR 34
TC 2
Z9 2
U1 0
U2 0
PU AMER INST AERONAUTICS & ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DR, STE 500, RESTON, VA 20191-4344 USA
SN 0079-6050
BN 978-1-56347-956-4
J9 PROG ASTRONAUT AERON
PY 2009
VL 227
BP 423
EP 454
PG 32
WC Engineering, Aerospace; Astronomy & Astrophysics
SC Engineering; Astronomy & Astrophysics
GA BJU79
UT WOS:000267214100014
ER
PT B
AU Yang, C
Blasch, E
Kadar, I
AF Yang, Chun
Blasch, Erik
Kadar, Ivan
GP IEEE
TI Geometric Factors in Target Positioning and Tracking
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Ranging & Bearing-Only Sensors; Geometry; LOS; GDOP
AB In target positioning and tracking, most sensors provide measurements either as range or bearing or both. The measurements are used to update an a priori estimate either via a linearized least squares method or all extended Kalman filter. In either case, the resulting solution has two components, one is related to the measurement prediction errors and the other is an observation matrix obtained from linearizing the nonlinear measurement equations around the a priori estimate. This paper studies the geometric factors explicitly and relates the observation matrix to the line of sight (LOS) vector for a ranging sensor and the direction perpendicular to the LOS vector of a bearing-only sensor. As a result, the updating of estimation error covariance with range and bearing measurements can be intuitively assessed via the shaping of estimation error ellipse along LOS directions. It provides a valuable means for target positioning and tracking performance modeling and prediction and can thus be used in active management of distributed sensor resources and sensor path planning.
C1 [Yang, Chun] Sigtem Technol Inc, San Mateo, CA 94402 USA.
[Blasch, Erik] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kadar, Ivan] Interlink Sci Syst Inc, New Hyde Pk, NY 11042 USA.
RP Yang, C (reprint author), Sigtem Technol Inc, San Mateo, CA 94402 USA.
EM chunynag@sigtem.com; erik.blasch@wpafb.afb.mil;
ikadar@SystemsSciences.com
FU [FA8650-05-C-1808]; [FA8650-08-C-1407]
FX Research supported in part under Contracts No. FA8650-05-C-1808 and
FA8650-08-C-1407, which are gratefully acknowledged.
NR 16
TC 3
Z9 3
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 85
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000012
ER
PT B
AU Oxley, ME
Thorsen, SN
Schubert, CM
AF Oxley, Mark E.
Thorsen, Steven N.
Schubert, Christine M.
GP IEEE
TI The ROC Manifold of Fused Independent Classification Systems
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Classification System; Automatic Target Recognition; Label Fusion; ROC
Manifold
AB A Classification system such as an Automatic Target Recognition (ATR) system with N labels (or decisions) will have N(N - 1) possible errors. The Receiver Operating Characteristic (ROC) manifold was created to quantify all of these errors. When multiple ATR systems are fused, the assumption of independence is usually made in order to mathematically combine the individual ROC manifolds for each system into one ROC manifold. This paper will investigate label fusion (also called decision fusion) of multiple classification systems that have the same number of output labels. The formula for the resultant ROC manifold of the fused classification systems which incorporates the individual classification systems will be derived. Specifically, given a fusion rule and two classification systems, the ROC manifold for the fused system is produced. We generate a formulas for the Boolean-like AND rule and give the resultant ROC manifold for the fused system. An example is given that demonstrates how this formula is used.
C1 [Oxley, Mark E.] USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Thorsen, Steven N.] US Air Force Acad, Dept Math Sci, Colorado Springs, CO 80840 USA.
[Schubert, Christine M.] Virginia Commonwealth Univ, Dept Biostat, Richmond, VA 23298 USA.
RP Oxley, ME (reprint author), USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
EM mark.oxley@afit.edu; steven.thorsen@usafa.edu; cmschubert@vcu.edu
FU Air Force Office of Scientific Research (AFOSR/MN); Air Force Research
laboratory (AFRL/RBSA); National Aerospace and Science Intelligence
Center (NASIC)
FX We acknowledge the financial support for this research from the Air
Force Office of Scientific Research (AFOSR/MN); the Air Force Research
laboratory (AFRL/RBSA); and the National Aerospace and Science
Intelligence Center (NASIC).
NR 12
TC 4
Z9 4
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 466
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000061
ER
PT B
AU Yang, C
Kadar, I
Blasch, E
AF Yang, Chun
Kadar, Ivan
Blasch, Erik
GP IEEE
TI Performance-Driven Resource Management In Layered Sensac
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Layered Sensing; Performance-Driven; Geometric Approach; Resource
Management; Measures of Merit (MOM)
ID WAVE-FORM SELECTION; RIDGE-REGRESSION
AB Layered sensing provides a hierarchical net-centric architecture for universal situational awareness with global coverage and persistent surveillance. Sensors in the layered hierarchy provide spatial, temporal, spectral, and polarization diversity with different scales and resolutions over different time horizons. Cooperative management of netted sensors is a successful strategy to achieve targeting performance and overall measures of merit (MOM) goals. After a brief introduction to issues in layered sensors, a resource management strategy based on geometry information is described so as to enhance performance in target detection (minimum detectable Doppler) and tracking accuracy (geometric dilution of precision). Preliminary simulation results are presented to illustrate this Geometric Approach to Layered Sensing (GALS) concept.
C1 [Yang, Chun] Sigtem Technol Inc, San Mateo, CA 94402 USA.
[Kadar, Ivan] Interlink Sci Syst Inc, Lake Success, NY USA.
[Blasch, Erik] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Yang, C (reprint author), Sigtem Technol Inc, San Mateo, CA 94402 USA.
EM chunynag@sigtem.com; ikadar@SystemsSciences.com;
erik.blasch@wpafb.afb.mil
FU [FA8650-05-C-1808]; [FA8650-08-C-1407]
FX Research supported in part under Contracts No. FA8650-05-C-1808 and
FA8650-08-C-1407, which are gratefully acknowledged.
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 850
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000110
ER
PT B
AU Kahler, B
Blasch, E
AF Kahler, Bart
Blasch, Erik
GP IEEE
TI Impact of HRR Radar Processing on Moving Target Identification
Performance
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE radar; clutter suppression; clutter cancelation; space-time adaptive
processing (STAP); Displaced Phase Center Antenna (DPCA); multi-channel
signal subspace (MSS); automatic target recognition (ATR); High Range
Resolution (HRR); moving target identification
AB Airborne radar tracking in moving ground vehicle scenarios is impacted by sensor, target, and environmental dynamics. Moving targets can be assessed with 1-D High Range Resolution (HRR) Radar profiles with sufficient signal-to-noise (SNR) present which contain enough feature information to discern one target from another to help maintain track or to identify, the vehicle. Typical radar clutter suppression algorithms developed for processing moving ground target data not only remove the surrounding clutter but also a portion of the target signature. Enhanced clutter suppression can be achieved using a multi-channel signal subspace (MSS) algorithm which preserves target features. In this paper, we (1) exploit extra information from enhanced clutter suppression for automatic target recognition (ATR), (2) present a gain comparison using displaced phase center antenna (DPCA) and MSS clutter suppressed HRR data; and (3) develop a confusion-matrix identity result for simultaneous tracking and identification (STID). The results show that more channels for MSS increase ID over DCPA, result in a slightly noisier clutter suppressed image, and preserve more target features after clutter cancellation
C1 [Kahler, Bart] Gen Dynam Corp, Wright Patterson AFB, OH 45433 USA.
[Blasch, Erik] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Kahler, B (reprint author), Gen Dynam Corp, Wright Patterson AFB, OH 45433 USA.
NR 50
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 858
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000111
ER
PT B
AU Chen, HM
Chen, GS
Blasch, EP
Douville, P
Pham, K
AF Chen, Huimin
Chen, Genshe
Blasch, Erik P.
Douville, Philip
Pham, Khanh
GP IEEE
TI Information Theoretic Measures for Performance Evaluation and Comparison
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Performance evaluation; information theoretic measure; detection;
estimation; filtering
ID CLASSIFICATION
AB This paper discusses the performance comparison of different algorithms for classification, estimation and filtering problems. Two information theoretic measures, namely, the empirical mutual information and the asymptotic information rate are proposed for simulation based performance evaluation and algorithm comparison. They can be used as a guideline for designing a practical procedure to measure the performance of different algorithms with limited computational resources. Other useful performance measures are reviewed and their relation to the two new measures discussed. Several practical examples are used to provide some insights on the inherent difficulty of algorithm ranking and the advantage of using the information theoretic measures for algorithm comparison.
C1 [Chen, Huimin] Univ New Orleans, Dept Elect Engn, New Orleans, LA 70148 USA.
[Chen, Genshe] DCM Res Resources, LLC, Germanttown, MD 20874 USA.
[Blasch, Erik P.; Douville, Philip] AFRL, RYAA, Wright Patterson AFB, OH 45433 USA.
[Pham, Khanh] AFRL, RVSV, Kirtland AFB, NM 87117 USA.
RP Chen, HM (reprint author), Univ New Orleans, Dept Elect Engn, New Orleans, LA 70148 USA.
EM hchen2@uno.edu; gchen@dcmresearchresources.com;
Erik.Blasch@wpafb.af.mil; Philip.Douville@wpafb.af.mil;
Khanh.Pham@kirtland.af.mil
FU US Air Force [FA9453-09-C-0175, FA8650-09-M-1552]; Army Research Office
[W911NF-08-1-0409]; Louisiana Board of Regents [NSF(2009)-PFUND-162]
FX This work was supported in part by the US Air Force under contracts
FA9453-09-C-0175 and FA8650-09-M-1552, Army Research Office under
contract W911NF-08-1-0409, and Louisiana Board of Regents under contract
NSF(2009)-PFUND-162. The authors are grateful to the anonymous reviewers
for helpful comments and to Dr. Xiaokun Li at DCM Research Resources,
LLC, and Dr. V. P. Jilkov at University of New Orleans for stimulating
discussions.
NR 15
TC 3
Z9 3
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 874
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000113
ER
PT B
AU Li, DX
Chen, GS
Blasch, E
Pham, K
AF Li, Dongxu
Chen, Genshe
Blasch, Erik
Pham, Khanh
GP IEEE
TI Sensor Attack Avoidance: Linear Quadratic Game Approach
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Tracking; game; linear quadratic; equilibrium
AB For reliable and sustainable decision making, it is essential to perform intelligent sensing and data collection at scalable network resources costs. The sensor platforms used in a warfare may be under attacks from adversarial forces, which will largely impact the overall performance of surveillance systems. Thus, it is crucial that each intelligent sensor have the capability of detecting and avoiding possible attacks. In this paper, we study an attack-avoidance problem. under the framework of a LQ game formulation. This is a first attempt to solve such kind of problems. From a practical point of view, the inherent hard constraints have been approximated and replaced by soft constraints with a fixed optimization horizon. For implementation, a receding horizon scheme has been used in junction with the LQ strategies. Overall, the LQ strategies can provide good control guidance laws for the players.
C1 [Li, Dongxu] GM R&D, Warren, MI USA.
[Chen, Genshe] Res LLC, Res DCM, Germantown, MD USA.
[Blasch, Erik] WPAFB, RYAA, AFRL, Dayton, OH USA.
[Pham, Khanh] RVSV, AFRL, Kirtland AFB, NM USA.
RP Li, DX (reprint author), GM R&D, Warren, MI USA.
EM dongxu.li@gm.com; gchen@dcmresearch-resources.com;
Erik.blasch@wpafb.af.mil; Khanh.Pham@kirtland.af.mil
FU US Air Force [FA9453-09-M-0061, FA9453-09-C-175]
FX This work was supported in part by the US Air Force under contracts
FA9453-09-M-0061and FA9453-09-C-175.
NR 12
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 1131
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560000146
ER
PT B
AU Li, XK
Chen, GS
Blasch, E
Patrick, J
Yang, C
Kadar, I
AF Li, Xiaokun
Chen, Genshe
Blasch, Erik
Patrick, Jim
Yang, Chun
Kadar, Ivan
GP IEEE
TI A Geometric Feature-aided Game Theoretic Approach to Sensor Management
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Distributed sensors; sensor management; agent based negotiation; game
theory
ID MULTISENSOR; TRACKING; FUSION
AB Given the single-point node failure limitation of centralized sensor management schemes, decentralized sensor management (DSM) techniques are increasingly important for a simultaneous tracking and identification system. DSM options are realizable with the support of modern systems through increased bandwidth, wireless communication, and enhanced power, but require novel strategies to address constraints imposed by a large number of users Since game theory offers competitive models for distributed allocations of surveillance resources and provides mechanisms to handle the uncertainty of a surveillance area, we propose an agent-based negotiable game theoretic sensor management (ANGSm) approach. By incorporating subgame Nash Equilibrium into negotiation, all agent's needs are considered. With the DSM scheme, sensor assignment occurs locally, and with no central node, DSM reduces the risk of whole-system failures. To make the ANGSm approach more efficient and practical, a geometric feature, the range between a target and a sensor, is also incorporated in the bargaining strategy during sensor assignment. Simulation results of the geometric feature-aided game theoretic (GFGT) approach demonstrate the applicability of the proposed approach.
C1 [Li, Xiaokun; Chen, Genshe] DCM Res Resources LLC, Germantown, MD USA.
[Blasch, Erik; Patrick, Jim] WPAFB, AFRL, Dayton, OH USA.
[Yang, Chun] Sigtem Technol Inc, San Mateo, CA USA.
[Kadar, Ivan] Interlink Syst Sci Inc, Lake Success, NY USA.
RP Li, XK (reprint author), DCM Res Resources LLC, Germantown, MD USA.
EM xli@dcmresearchresources.com; gchen@dcmresearchresources.com;
Erik.blasch@wpafb.af.mil; James.patrick@wpafb.af.mil;
Chunyang.sigtem@sbcglobal.net; ikadar@SystemsSciences.com
FU US Air Force [FA8650-08-C-1407]
FX This research was supported in part by the US Air Force under contract
number FA8650-08-C-1407. 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 Air Force.
NR 19
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 1155
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560001003
ER
PT B
AU Blasch, E
Valin, P
Bosse, E
Nilsson, M
van Laere, J
Shahbazian, E
AF Blasch, Erik
Valin, Pierre
Bosse, Eloi
Nilsson, Maria
van Laere, Joeri
Shahbazian, Elisa
GP IEEE
TI Implication of Culture: User Roles in Information Fusion for Enhanced
Situational Understanding
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Fusion; Situational Assessment; Interface Design; Knowledge
Representation; User Refinement
AB Information Fusion coordinates large-volume data processing machines to address user needs. Users expect a situational picture to extend their ability of sensing events, movements, and activities. Typically, data is collected and processed for object location (e.g. target identification) and movement (e.g. tracking); however, high-level reasoning or situational understanding depends on the spatial, cultural, and political effects. In this paper, we explore opportunities where information fusion can aid in the selection and processing of the data for enhanced tacit knowledge understanding by (1) display fusion for data presentation (e.g. cultural segmentation), (2) interactive fusion to allow the user to inject a priori knowledge (e..g. cultural values), and (3) associated metrics of predictive capabilities (e.g. cultural networks). In a simple scenario for target identification with deception, cultural information impacts on situational understanding is demonstrated using the Technology-Emotion-Culture-Knowledge (TECK) attributes of the Observe-Orient-Decide-Act (OODA) model.
C1 [Blasch, Erik] USAF, Res Lab, 2241 Avionics Cir, Wright Patterson AFB, OH 45433 USA.
[Valin, Pierre; Bosse, Eloi] Def R & D Canada Valcartier, Quebec City, PQ, Canada.
[van Laere, Joeri] Univ Skovde, Skovde, Sweden.
[Shahbazian, Elisa] OODA Technol, Montreal, PQ, Canada.
RP Blasch, E (reprint author), USAF, Res Lab, 2241 Avionics Cir, Wright Patterson AFB, OH 45433 USA.
EM erik.blasch@wpafb.af.mil; pierre.valin@drdc-rddc.gc.ca;
eloi.bosse@drdc-rddc.gc.ca; maria.nilsson@is.se; joeri.van.laere@his.se;
elisa.shahbazian@ooda.ca
NR 45
TC 3
Z9 3
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 1272
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560001018
ER
PT B
AU Chong, CY
Castanon, G
Cooprider, N
Mori, S
Ravichandran, R
Macior, R
AF Chong, Chee-Yee
Castanon, Greg
Cooprider, Nathan
Mori, Shozo
Ravichandran, Ravi
Macior, Robert
GP IEEE
TI Efficient Multiple Hypothesis Tracking by Track Segment Graph
SO FUSION: 2009 12TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION, VOLS
1-4
LA English
DT Proceedings Paper
CT 12th International Conference on Information Fusion
CY JUL 06-09, 2009
CL Seattle, WA
SP ISIF, IEEE, ONR, ARL, AF Res Lab, Northrop Grumman, CUBRC, Boeing Co, Georgia Tech Res Inst
DE Multiple hypothesis tracking; track segment graph; long term tracking;
feature aided tracking
AB Multiple hypothesis tracking (MHT) addresses difficult tracking problems by maintaining alternative association hypotheses until enough good data, e.g., features, are collected to select the correct hypotheses. Traditional MHT's cannot track targets over long durations because they frequently generate too many hypotheses to maintain the correct ones with the available processing resources. Track segment graph provides a compact and efficient representation of the key ambiguities in long term tracking. It is used to generate the long term track hypotheses that are evaluated to select the best long term global hypothesis. Simulation examples demonstrate the efficiency and optimality of the approach.
C1 [Chong, Chee-Yee; Castanon, Greg; Cooprider, Nathan; Mori, Shozo; Ravichandran, Ravi] BAE Syst, Burlington, MA 01803 USA.
[Macior, Robert] RIEA, Air Force Res Lab, Rome, NY 13441 USA.
RP Chong, CY (reprint author), BAE Syst, Burlington, MA 01803 USA.
EM chee.chong@baesystems.com; greg.castanon@baesystems.com;
nathan.cooprider@baesystems.com; shozo.mori@baesystems.com;
balasubramaniam.ravichandran@baesystems.com; robert.macior@us.af.mil
FU Air Force Research Lab [FA8750-08-C-0034]
FX Approved for public release. The work reported in this paper was
supported by the Air Force Research Lab. under contract
FA8750-08-C-0034. However, the information provided does not represent
the official position of the AirForce or the U.S. Government.
NR 14
TC 9
Z9 9
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9824-4380-4
PY 2009
BP 2177
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BMT89
UT WOS:000273560001136
ER
PT B
AU Weissgerber, K
Borghetti, B
Lamont, G
Mendenhall, M
AF Weissgerber, Kurt
Borghetti, Brett
Lamont, Gary
Mendenhall, Michael
BE Saur, J
Loper, M
TI TOWARDS AUTOMATED FEATURE SELECTION IN REAL-TIME STRATEGY GAMES
SO GAME-ON-NA 2009: 5TH INTERNATIONAL NORTH AMERICAN CONFERENCE ON
INTELLIGENT GAMES AND SIMULATION
LA English
DT Proceedings Paper
CT 5th International North-American-Conference on Intelligent Games and
Simulation
CY AUG 26-28, 2009
CL Georgia Tech, Atlanta, GA
SP European Technol Inst, Game Pipe, Eurosis, Ghent Univ, UBISOFT, GAME-PIPE, Modelbenders, GR at M, Larian Studies, Moves Inst, HI-Rez Studios
HO Georgia Tech
DE Real-time Strategy; Feature Selection; Classification; Clustering;
Optimization
AB Since the underlying goal of an Artificial Intelligence agent in a real time strategy game (RTS) is to defeat the enemy, the correctness of any state representation can be determined by the agent's ability to quickly and correctly evaluate the likelihood the agent will win using that representation. Feature selection methods are techniques for finding the important parameters in a representation. We present two feature selection methods for representing a state in a RTS and show how they can generate classification models highly predictive of whether the agent will win or lose, long before the game is over.
C1 [Weissgerber, Kurt; Borghetti, Brett; Lamont, Gary; Mendenhall, Michael] USAF, Inst Technol, Grad Sch Engn, Wright Patterson AFB, OH 45433 USA.
RP Weissgerber, K (reprint author), USAF, Inst Technol, Grad Sch Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM kurt.weissgerber@afit.edu; brett.borghetti@afit.edu;
gary.lamont@afit.edu; michael.mendenhall@afit.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU EUROSIS
PI GHENT
PA GHENT UNIV, COUPURE LINKS 653, GHENT, B-9000, BELGIUM
BN 978-9-07738-149-6
PY 2009
BP 25
EP 32
PG 8
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering
SC Computer Science
GA BPV85
UT WOS:000280112400005
ER
PT S
AU Yang, SB
Zhong, F
Yeo, CK
Lee, BS
Beleng, J
AF Yang, Shengbo
Zhong, Feng
Yeo, Chai Kiat
Lee, Bu Sung
Beleng, Jeff
BE Ulema, M
TI Position based Opportunistic Routing for Robust Data Delivery in MANETs
SO GLOBECOM 2009 - 2009 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-8
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 09)
CY NOV 30-DEC 04, 2009
CL Honolulu, HI
SP IEEE
ID NETWORK
AB Traditional MANET routing protocols are quite susceptible to link failure as well as vulnerable to malicious node attack. In this paper, we propose a novel protocol called Position based Opportunistic Routing (POR) which takes full advantage of the broadcast nature of wireless channel and opportunistic forwarding. The data packets are transmitted as a way of multicast (which is actually implemented by MAC interception) with multiple forwarders. A forwarder list determined by previous hop according to local position information is inserted into the IP header and the candidates take turn to forward the packet based on a predefined orders. This redundancy and randomness make it quite efficient and robust. In addition, inherited from position based routing, POR's control overhead is almost negligible which justifies its good scalability. Both theoretical analysis and simulation results show that POR not only achieves outstanding performances in normal situations but also yields excellent resilience in hostile environments.
C1 [Yang, Shengbo; Zhong, Feng; Yeo, Chai Kiat; Lee, Bu Sung] Nanyang Technol Univ, Sch Comp Engn, Ctr Multimedia & Network Technol, Singapore 639798, Singapore.
[Beleng, Jeff] US Air Force, Colorado Springs, CO USA.
RP Yang, SB (reprint author), Nanyang Technol Univ, Sch Comp Engn, Ctr Multimedia & Network Technol, Singapore 639798, Singapore.
EM yang0201@ntu.edu.sg; zhon0026@ntu.edu.sg; asckyeo@ntu.edu.sg;
ebslee@ntu.edu.sg; Jeff.Boleng@usafa.edu
RI Lee, Francis BS/G-9323-2014
OI Lee, Francis BS/0000-0001-7828-7900
NR 15
TC 8
Z9 8
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-529X
BN 978-1-4244-4147-1
J9 GLOB TELECOMM CONF
PY 2009
BP 1325
EP 1330
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQB54
UT WOS:000280579100219
ER
PT S
AU Li, M
Batalama, SN
Pados, DA
Matyjas, JD
AF Li, Ming
Batalama, Stella N.
Pados, Dimitris A.
Matyjas, John D.
BE Ulema, M
TI New Bounds on the Total-Squared-Correlation of Quaternary Signature Sets
and Optimal Designs
SO GLOBECOM 2009 - 2009 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-8
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 09)
CY NOV 30-DEC 04, 2009
CL Honolulu, HI
SP IEEE
DE Code-division multiplexing; quaternary alphabet; sequences; Welch bound
ID KARYSTINOS-PADOS BOUNDS; DS-CDMA; INTERFERENCE AVOIDANCE; WIRELESS
SYSTEMS; SUM CAPACITY; SEQUENCES; MATRICES; WELCH
AB We derive new bounds on the total squared correlation (TSC) of quaternary (quadriphase) signature/sequence sets for all lengths L and set sizes K. Then, for all K, L, we design minimum-TSC optimal sets that meet the new bounds with equality. Direct numerical comparison with the TSC value of the recently obtained optimal binary sets shows under what K,L realizations gains are materialized by moving from the binary to the quaternary code-division multiplexing alphabet. On the other hand, comparison with the Welch TSC value for real/complex-field sets shows that, arguably, not much is to be gained by raising the alphabet size above four for any K, L.
C1 [Li, Ming; Batalama, Stella N.; Pados, Dimitris A.] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
[Matyjas, John D.] Air Force Res Lab, RIGE, Griffiss AFB, NY 13441 USA.
RP Batalama, SN (reprint author), SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
EM mingli@eng.buffalo.edu; betalama@eng.buffalo.edu; pados@eng.buffalo.edu;
John.Matyjas@rl.af.mil
NR 21
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-529X
BN 978-1-4244-4147-1
J9 GLOB TELECOMM CONF
PY 2009
BP 6328
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQB54
UT WOS:000280579102225
ER
PT B
AU Campbell, JL
de Haag, MU
AF Campbell, Jacob L.
de Haag, Maarten Uijt
BE Gleason, S
GebreEgziabher, D
TI Integrated LADAR, INS, and GNSS Navigation
SO GNSS APPLICATIONS AND METHODS
SE Artech House GNSS Technology and Applications Library
LA English
DT Article; Book Chapter
C1 [Campbell, Jacob L.] USAF, Res Lab, Reference Syst Branch, Wright Patterson AFB, OH 45433 USA.
[Campbell, Jacob L.; de Haag, Maarten Uijt] Ohio Univ, Avion Engn Ctr, Athens, OH 45701 USA.
RP Campbell, JL (reprint author), USAF, Res Lab, Reference Syst Branch, Wright Patterson AFB, OH 45433 USA.
NR 10
TC 1
Z9 1
U1 0
U2 0
PU ARTECH HOUSE
PI NORWOOD
PA 685 CANTON ST, NORWOOD, MA 02062 USA
BN 978-1-59693-329-3
J9 ARTECH HSE GNSS TECH
PY 2009
BP 191
EP 210
PG 20
WC Geosciences, Multidisciplinary
SC Geology
GA BKZ27
UT WOS:000269670900008
ER
PT B
AU Badiru, AB
AF Badiru, Adedeji B.
BE Badiru, AB
Thomas, MU
TI Hierarchical Dynamic Decision Making
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
ID DELPHI METHOD; TECHNOLOGY; SELECTION; CHOICE; AHP
C1 USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
RP Badiru, AB (reprint author), USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
NR 43
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 13
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000024
ER
PT B
AU Badiru, AB
Aikens, CH
AF Badiru, Adedeji B.
Aikens, Charles H.
BE Badiru, AB
Thomas, MU
TI Optimization Model for Military Budget Allocation and Capital Rationing
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Badiru, Adedeji B.] USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
[Aikens, Charles H.] Univ Tennessee, Dept Ind & Informat Engn, Knoxville, TN USA.
RP Badiru, AB (reprint author), USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 22
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000008
ER
PT B
AU Badiru, AB
AF Badiru, Adedeji B.
BE Badiru, AB
Thomas, MU
TI Executive Summary: Handbook of Military Industrial Engineering
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
RP Badiru, AB (reprint author), USAF, Inst Technol, Dept Syst & Engn Management, Dayton, OH USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 11
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000001
ER
PT B
AU Blue, M
Hill, RR
AF Blue, Misty
Hill, Raymond R.
BE Badiru, AB
Thomas, MU
TI Human Factors in Military Systems
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
ID PILOTED AIRCRAFT OPERATIONS; AUTOMATION
C1 [Blue, Misty] Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
[Hill, Raymond R.] USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
RP Blue, M (reprint author), Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
NR 41
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 16
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000025
ER
PT B
AU Cochran, JK
Lewis, TP
AF Cochran, Jeffery K.
Lewis, Theodore P.
BE Badiru, AB
Thomas, MU
TI Computing Small-Fleet Aircraft Availabilities Including Redundancy and
Spares
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Cochran, Jeffery K.] USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
[Lewis, Theodore P.] USAF, Mat Command Headquarters, Dayton, OH USA.
RP Cochran, JK (reprint author), USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 10
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000013
ER
PT B
AU Deckro, RF
Moore, JT
Fredley, ML
Jackson, JA
Artelli, MJ
Van Hove, JC
AF Deckro, Richard F.
Moore, James T.
Fredley, Michael L.
Jackson, Jack A.
Artelli, Michael J.
Van Hove, John C.
BE Badiru, AB
Thomas, MU
TI Joint and Multinational Campaign Planning: A Project/Program Management
Approach
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
ID DECOMPOSITION; PROGRAMS
C1 [Deckro, Richard F.; Moore, James T.] USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
[Artelli, Michael J.] Air Combat Command, Directorate Analyses & Lessons Learned, Newport News, VA USA.
[Fredley, Michael L.] Natl Reconnaissance Off, Chantilly, VA USA.
[Jackson, Jack A.] Inst Def Analyses, Alexandria, VA USA.
[Van Hove, John C.] Air Educ & Training Command, Studies & Anal Squadron, San Antonio, TX USA.
RP Deckro, RF (reprint author), USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 13
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000016
ER
PT B
AU Hill, RR
Pohl, EA
AF Hill, Raymond R.
Pohl, Edward A.
BE Badiru, AB
Thomas, MU
TI An Overview of Meta-Heuristics and Their Use in Military Modeling
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
ID TABU SEARCH APPROACH; GENETIC ALGORITHM; PACKING PROBLEM; SCATTER
SEARCH; AIRCRAFT; ASSIGNMENT; OPERATIONS; DESIGN; PATHS; CREW
C1 [Hill, Raymond R.] USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
[Pohl, Edward A.] Univ Arkansas, Dept Ind Engn, Fayetteville, AR 72701 USA.
RP Hill, RR (reprint author), USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
NR 68
TC 0
Z9 0
U1 1
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 25
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000009
ER
PT B
AU Hodgson, TJ
Spivey, WO
Trainor, TE
Williams, MK
AF Hodgson, Thom J.
Spivey, W. Owen
Trainor, Tim E.
Williams, Michael K.
BE Badiru, AB
Thomas, MU
TI The Deployment Analysis Network Tool Extended (DANTE)
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Hodgson, Thom J.] N Carolina State Univ, Fitts Dept Ind & Syst Engn, Raleigh, NC 27695 USA.
[Spivey, W. Owen] Combat Dev Engn Field Off, Ft Eustis, VA USA.
[Williams, Michael K.] JDPAC, Transportat Engn Agcy, Scott AFB, IL USA.
[Williams, Michael K.] SDDCTEA, Scott AFB, IL USA.
[Trainor, Tim E.] US Mil Acad, Dept Syst Engn, New York, NY USA.
RP Hodgson, TJ (reprint author), N Carolina State Univ, Fitts Dept Ind & Syst Engn, Raleigh, NC 27695 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 15
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000019
ER
PT B
AU Howe, JA
Thoele, BA
Pendley, SA
Antoline, AF
Golden, RD
AF Howe, Jeremy A.
Thoele, Benjamin A.
Pendley, Scotty A.
Antoline, Anthony F.
Golden, Roger D.
BE Badiru, AB
Thomas, MU
TI Beyond Authorized versus Assigned: Aircraft Maintenance Personnel
Capacity
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Howe, Jeremy A.; Thoele, Benjamin A.; Pendley, Scotty A.; Antoline, Anthony F.; Golden, Roger D.] USAF, Logist Management Agcy, Maintenance Studies Branch, Montgomery, AL USA.
RP Howe, JA (reprint author), USAF, Logist Management Agcy, Maintenance Studies Branch, Montgomery, AL USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 13
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000015
ER
PT B
AU Moore, JT
Barnes, JW
Hill, RR
AF Moore, James T.
Barnes, J. Wesley
Hill, Raymond R.
BE Badiru, AB
Thomas, MU
TI Modeling the End-to-End Military Transportation Problem
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
ID BIN PACKING PROBLEM; TABU SEARCH APPROACH; LOCATION-ROUTING PROBLEM;
LOADING PROBLEM; HEURISTIC ALGORITHMS; GENETIC ALGORITHMS; ORTHOGONAL
PACKING; CONTAINER; OPTIMIZATION; AIRCRAFT
C1 [Moore, James T.; Hill, Raymond R.] USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
[Barnes, J. Wesley] Univ Texas Austin, Grad Program Operat Res & Ind Engn, Austin, TX 78712 USA.
RP Moore, JT (reprint author), USAF, Inst Technol, Dept Operat Sci, Dayton, OH USA.
NR 115
TC 0
Z9 0
U1 1
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 74
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000006
ER
PT B
AU Thomas, MU
AF Thomas, Marlin U.
BE Badiru, AB
Thomas, MU
TI Inventory Models for Contingency Operations
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
RP Thomas, MU (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 12
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000021
ER
PT B
AU Thomas, MU
Lawley, MA
AF Thomas, Marlin U.
Lawley, Mark A.
BE Badiru, AB
Thomas, MU
TI Reserve Manufacturing Capacity for Augmenting Contingency Logistics
Requirements
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Thomas, Marlin U.] USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
[Lawley, Mark A.] Purdue Univ, Dept Ind Engn, W Lafayette, IN 47907 USA.
RP Thomas, MU (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 10
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000020
ER
PT B
AU Thomas, MU
AF Thomas, Marlin U.
BE Badiru, AB
Thomas, MU
TI Assessing the Reliability of a Contingency Logistics Network
SO HANDBOOK OF MILITARY INDUSTRIAL ENGINEERING
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
RP Thomas, MU (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6628-9
J9 IND INNOV SER
PY 2009
D2 10.1201/9781420066296
PG 13
WC Business; Engineering, Industrial; Engineering, Manufacturing;
Management; Operations Research & Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX99
UT WOS:000267387000012
ER
PT J
AU Gearhart, JM
Robinson, PJ
Jakubowski, EM
AF Gearhart, Jeffery M.
Robinson, Peter J.
Jakubowski, Edward M.
BE Gupta, RC
TI Physiologically Based Pharmacokinetic Modeling of Chemical Warfare
Agents
SO HANDBOOK OF TOXICOLOGY OF CHEMICAL WARFARE AGENTS
LA English
DT Article; Book Chapter
ID PHARMACODYNAMIC MODEL; EXPOSURE; SOMAN; SARIN
C1 [Gearhart, Jeffery M.; Robinson, Peter J.] Air Force Res Lab, Henry M Jackson Fdn, Appl Biotechnol Branch, Wright Patterson AFB, OH 45433 USA.
[Jakubowski, Edward M.] US Army Edgewood Chem Biol Ctr, AMSRD ECB RT TN, Aberdeen Proving Ground, MD 21010 USA.
RP Gearhart, JM (reprint author), Air Force Res Lab, Henry M Jackson Fdn, Appl Biotechnol Branch, Bldg 837,2729 R St, Wright Patterson AFB, OH 45433 USA.
NR 15
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER ACADEMIC PRESS INC
PI SAN DIEGO
PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA
BN 9780-0-80-92273-7
PY 2009
BP 791
EP 798
DI 10.1016/B978-012374484-5.00051-1
PG 8
WC Toxicology
SC Toxicology
GA BFT95
UT WOS:000321306800052
ER
PT J
AU Merrill, E
Ruark, C
Gearhart, J
Robinson, P
AF Merrill, Elaine
Ruark, Chris
Gearhart, Jeff
Robinson, Peter
BE Gupta, RC
TI Physiologically Based Pharmacokinetic/Pharmacodynamic Modeling of
Countermeasures to Nerve Agents
SO HANDBOOK OF TOXICOLOGY OF CHEMICAL WARFARE AGENTS
LA English
DT Article; Book Chapter
ID PLASMA PARTITION-COEFFICIENTS; PHARMACODYNAMIC PBPK/PD MODEL;
SOMAN-INDUCED SEIZURES; ORGANIC-CHEMICALS; PHARMACOKINETIC MODELS;
TISSUE DISTRIBUTION; BRAIN-DAMAGE; BASIC DRUGS; IN-VIVO; HUMAN
ACETYLCHOLINESTERASE
C1 [Merrill, Elaine; Ruark, Chris] Henry M Jackson Fdn Adv Mil Med, Wright Patterson AFB, OH 45433 USA.
[Gearhart, Jeff; Robinson, Peter] Air Force Res Lab, Appl Biotechnol Branch, Henry M Jackson Fdn, Wright Patterson AFB, OH 45433 USA.
RP Merrill, E (reprint author), Henry M Jackson Fdn Adv Mil Med, AFRL RHPB Bldg 837,2729 R St, Wright Patterson AFB, OH 45433 USA.
NR 81
TC 0
Z9 0
U1 1
U2 2
PU ELSEVIER ACADEMIC PRESS INC
PI SAN DIEGO
PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA
BN 9780-0-80-92273-7
PY 2009
BP 951
EP 964
DI 10.1016/B978-012374484-5.00062-6
PG 14
WC Toxicology
SC Toxicology
GA BFT95
UT WOS:000321306800063
ER
PT S
AU Zhdanov, BV
Shaffer, MK
Sell, J
Knize, RJ
AF Zhdanov, B. V.
Shaffer, M. K.
Sell, J.
Knize, R. J.
BE Davis, SJ
Heaven, MC
Schriempf, JT
TI Transverse pumped Cs vapor laser
SO HIGH ENERGY/AVERAGE POWER LASERS AND INTENSE BEAM APPLICATIONS III
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on High Energy/Average Power Lasers and Intense Beam
Applications III
CY JAN 26-27, 2009
CL San Jose, CA
SP SPIE
DE Alkali lasers; Optically pumped
ID DIODE ARRAY
AB Scaling of alkali lasers to higher powers requires combining beams of multiple diode laser pump sources. For longitudinal pumping this can be very complicated if more than four beams are to be combined. In this paper we report a first demonstration of a transversely pumped Cs laser with fifteen laser diode arrays. The LDA pump beams were individually collimated with a beam size of about 1 x 4 cm as measured at a 1 m distance from the diodes. All these beams were incident on a cylindrical lens to be focused and coupled through the side slit of a hollow, cylindrical diffuse reflector which contained the Cs vapor cell. We measured the output power and efficiency of the Cs laser for pump powers up to 200 W at different cell temperatures. Although the values of output power and slope efficiency obtained for this laser system were less than those for a longitudinally pumped alkali laser, these recent results can be significantly improved by using a more optimal laser cavity design. The demonstrated operation of Cs laser with transverse pumping opens new possibilities in power scaling of alkali lasers.
C1 [Zhdanov, B. V.; Shaffer, M. K.; Sell, J.; Knize, R. J.] USAF Acad, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), USAF Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Ste 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
NR 7
TC 0
Z9 1
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7442-1
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7196
AR 71960F
DI 10.1117/12.808264
PG 5
WC Optics; Physics, Applied
SC Optics; Physics
GA BST42
UT WOS:000285742500013
ER
PT B
AU Wright, R
Gemelli, N
AF Wright, Robert
Gemelli, Nathaniel
BA Filipe, J
BF Filipe, J
BE Fred, A
TI STATE AGGREGATION FOR REINFORCEMENT LEARNING USING NEUROEVOLUTION
SO ICAART 2009: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON AGENTS AND
ARTIFICIAL INTELLIGENCE
LA English
DT Proceedings Paper
CT 1st International Conference on Agents and Artificial Intelligence
CY JAN 19-21, 2009
CL Inst Syst & Technol Informat, Control & Commun, Porto, PORTUGAL
SP Workflow Manage Coalit, Assoc Adv Artificial Intell, Special Interest Grp Artificial Intell
HO Inst Syst & Technol Informat, Control & Commun
DE Reinforcement learning; NeuroEvolution; Evolutionary algorithms; State
aggregation
AB In this paper, we present a new machine learning algorithm, RL-SANE, which uses a combination of neuroevolution (NE) and traditional reinforcement learning (RL) techniques to improve learning performance. RL-SANE is an innovative combination of the neuroevolutionary algorithm NEAT(Stanley, 2004) and the RL algorithm Sarsa(lambda)(Sutton and Barto, 1998). It uses the special ability of NEAT to generate and train customized neural networks that provide a means for reducing the size of the state space through state aggregation. Reducing the size of the state space through aggregation enables Sarsa(lambda) to be applied to much more difficult problems than standard tabular based approaches. Previous similar work in this area, such as in Whiteson and Stone (Whiteson and Stone, 2006) and Stanley and Miikkulainen (Stanley and Miikkulainen, 2001), have shown positive and promising results. This paper gives a brief overview of neuroevolutionary methods, introduces the RL-SANE algorithm, presents a comparative analysis of RL-SANE to other neuroevolutionary algorithms, and concludes with a discussion of enhancements that need to be made to RL-SANE.
C1 [Wright, Robert; Gemelli, Nathaniel] AF Res Lab, Informat Directorate, Rome, NY 13441 USA.
RP Wright, R (reprint author), AF Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.
EM Robert.Wright@rl.af.mil; Nathaniel.Gemelli@rl.af.mil
NR 15
TC 1
Z9 1
U1 0
U2 2
PU INSTICC-INST SYST TECHNOLOGIES INFORMATION CONTROL & COMMUNICATION
PI SETUBAL
PA AVENIDA D MANUEL L, 27A 2 ESQUERDO, SETUBAL, 2910-595, PORTUGAL
BN 978-989-8111-66-1
PY 2009
BP 45
EP 52
PG 8
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering
SC Computer Science
GA BJS03
UT WOS:000267058000008
ER
PT B
AU Havrilla, MJ
Hyde, MW
AF Havrilla, M. J.
Hyde, M. W.
GP IEEE
TI Sensitivity of Dual Waveguide Probe Complex Permittivity and
Permeability Measurement to Probe Lift-Off Error
SO ICEAA: 2009 INTERNATIONAL CONFERENCE ON ELECTROMAGNETICS IN ADVANCED
APPLICATIONS, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT International Conference on Electromagnetics in Advanced Applications
(ICEAA 2009)
CY SEP 14-18, 2009
CL Torino, ITALY
ID FREQUENCIES
AB The effect of lift-off (i.e., air-gap) error in dual waveguide probe material characterization measurements is presented here. The mitigation of this error using a two-layer dyadic Green's function analysis is also discussed. Experimental results for gap scenarios of an electromagnetic shielding material are presented for validation purposes.
C1 [Havrilla, M. J.; Hyde, M. W.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Havrilla, MJ (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM michael.havrilla@afit.edu; milo.hyde@afit.edu
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3385-8
PY 2009
BP 192
EP 195
PG 4
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BOY29
UT WOS:000278037600048
ER
PT B
AU Lo Monte, L
Erricolo, D
Ansari, R
Soldovieri, F
Wicks, MC
AF Lo Monte, Lorenzo
Erricolo, Danilo
Ansari, Rashid
Soldovieri, Francesco
Wicks, Michael C.
GP IEEE
TI Underground Imaging using RF Tomography: the Effect of Lateral Waves
SO ICEAA: 2009 INTERNATIONAL CONFERENCE ON ELECTROMAGNETICS IN ADVANCED
APPLICATIONS, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT International Conference on Electromagnetics in Advanced Applications
(ICEAA 2009)
CY SEP 14-18, 2009
CL Torino, ITALY
DE RF Tomography; Inverse Scattering; Buried Object Detection; Underground
Imaging
ID GROUND-PENETRATING RADAR; PLANAR AIR-SOIL; BORN APPROXIMATION; INVERSE
SCATTERING; INTERFACE; ALGORITHM; OBJECTS
AB Radio Frequency (RF) tomography is a novel strategy for underground imaging over relatively wide and deep surveillance areas.
RF tomography requires a set of low-cost transmitters and receivers deployed randomly on the surface of the ground, or slightly buried. Using the principles of inverse scattering, it is possible to image below ground high contrast dielectric or conducting anomalies, thus revealing buried objects and hidden targets.
In RF Tomography, when antennas are buried, or targets are in shallow regions, waves are propagating in proximity of the air-earth interface; therefore, it is necessary to account the Green's function of the half-space and the interference effect of lateral waves. In this paper we introduce an improved inversion scheme that is robust with respect to noise and attenuation due to lossy soils. The effectiveness of this inversion strategy is shown by presenting images reconstructed via synthetic data.
C1 [Lo Monte, Lorenzo] Gen Dynam Informat Technol, 5100 Springfield Pike,Ste 504, Dayton, OH 45431 USA.
[Lo Monte, Lorenzo; Erricolo, Danilo; Ansari, Rashid] Univ Illinois, Chicago, IL 60680 USA.
[Soldovieri, Francesco] CNR, Ist Rilevamento Elettromagnet Ambiente, I-80124 Naples, Italy.
[Wicks, Michael C.] Air Force Res Lab, Griffiss AFB, NY 13441 USA.
RP Lo Monte, L (reprint author), Gen Dynam Informat Technol, 5100 Springfield Pike,Ste 504, Dayton, OH 45431 USA.
EM lorenzo.lomonte@gdit.com; erricolo@ece.uic.edu; ansari@ece.uic.edu;
soldovieri.f@irea.cnr.it; michael.wicks@rl.af.mil
OI Erricolo, Danilo/0000-0001-6352-9567; SOLDOVIERI,
FRANCESCO/0000-0002-0377-3127
FU Air Force Research Laboratory [F33601-02-F-A581]
FX This work was partially supported by the Air Force Research Laboratory,
under contract #F33601-02-F-A581.
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3385-8
PY 2009
BP 873
EP +
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BOY29
UT WOS:000278037600223
ER
PT B
AU Capraro, GT
Bradaric, I
Wicks, MC
AF Capraro, G. T.
Bradaric, I.
Wicks, M. C.
GP IEEE
TI Waveform Diversity in Distributed Radar
SO ICEAA: 2009 INTERNATIONAL CONFERENCE ON ELECTROMAGNETICS IN ADVANCED
APPLICATIONS, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT International Conference on Electromagnetics in Advanced Applications
(ICEAA 2009)
CY SEP 14-18, 2009
CL Torino, ITALY
AB The desire to anticipate actions before they occur is a goal within the military. Cognitive sensor and communications systems along with distributed radar systems are key enablers to meet this need. Close in sensing examples are provided showing the value of waveform diversity in distributed radar. The use of waveform diversity presents a challenge to the electromagnetic compatibility (EMC) community.
C1 [Capraro, G. T.; Bradaric, I.] Capraro Technl Inc, 2118 Beechgrove Pl, Utica, NY 13501 USA.
[Wicks, M. C.] USAF, Res Lab, Rome, NY 13441 USA.
RP Capraro, GT (reprint author), Capraro Technl Inc, 2118 Beechgrove Pl, Utica, NY 13501 USA.
EM gtc@caprarotechnlogies.com; ibradaric@caprarotechnlogies.com;
michael.wicks@rl.af.mil
FU USAF [FA8750-07-C-0015]
FX This work was partially supported under USAF contract FA8750-07-C-0015.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3385-8
PY 2009
BP 956
EP +
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BOY29
UT WOS:000278037600244
ER
PT B
AU Wicks, MC
Zhang, YH
Schneible, R
AF Wicks, Michael C.
Zhang, Yuhong
Schneible, Richard
GP IEEE
TI Detection of Spatially Extended Objects in Clutter
SO ICEAA: 2009 INTERNATIONAL CONFERENCE ON ELECTROMAGNETICS IN ADVANCED
APPLICATIONS, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT International Conference on Electromagnetics in Advanced Applications
(ICEAA 2009)
CY SEP 14-18, 2009
CL Torino, ITALY
AB Range-spread Doppler-spread signals in interference are readily discernable via the application of classical algorithms and architectures presented by Van Trees HI, and more recently by Kay [2] and others. However, when these returns emanate from stationary objects, the Generalized Inner Product (GIP) offers a unique tool for detection and discrimination processing. This paper offers insight into how the GIP may be applied to optimize the detection of spatially extended fixed objects in clutter.
C1 [Wicks, Michael C.] USAF, Res Lab, Sensors Directorate, Rome, NY 13441 USA.
[Zhang, Yuhong; Schneible, Richard] Stiefvater Consultants, Rome, NY 13441 USA.
RP Wicks, MC (reprint author), USAF, Res Lab, Sensors Directorate, Rome, NY 13441 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3385-8
PY 2009
BP 970
EP +
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BOY29
UT WOS:000278037600249
ER
PT B
AU Long, LCDS
Seering, W
Rebentisch, E
AF Long, Lt Col David S.
Seering, Warren
Rebentisch, Eric
BE Bergendahl, MN
Grimheden, M
Leifer, L
Skogstad, P
Lindemann, U
TI FINDING OPPORTUNITIES FOR COMMONALITY IN COMPLEX SYSTEMS
SO ICED 09 - THE 17TH INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, VOL
4: PRODUCT AND SYSTEMS DESIGN
LA English
DT Proceedings Paper
CT 17th International Conference on Engineering Design
CY AUG 24-27, 2009
CL Stanford Univ, Stanford, CA
SP Stanford Univ, Ctr Design Res, Design Soc
HO Stanford Univ
DE commonality; functional decomposition; system architecture; taxonomy;
lean
AB Many complex systems with similar functionalities are independently developed, entered into service, and must be supported throughout their lifecycles. Costs to support and maintain the systems could be decreased by employing strategies that increase commonality in the systems. We present a process for identifying opportunities and evaluating subsystems for increasing commonality in complex systems. Stakeholders can use our process to improve system management and decrease support costs of systems.
C1 [Long, Lt Col David S.] USAF, Inst Technol, Dept Syst & Engn, Wright Patterson AFB, OH 45433 USA.
RP Long, LCDS (reprint author), USAF, Inst Technol, Dept Syst & Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM david.long@afit.edu
NR 22
TC 0
Z9 0
U1 0
U2 0
PU DESIGN SOC
PI GLASGOW
PA UNIV STRATHCLYDE, DMEM, 75 MONTROSE ST, GLASGOW, GI 1XJ, ENGLAND
BN 978-1-904670-08-7
PY 2009
BP 83
EP 94
PG 12
WC Engineering, Manufacturing
SC Engineering
GA BZS29
UT WOS:000302735800008
ER
PT S
AU Toglia, C
Kettler, D
Kennedy, F
Dubowsky, S
AF Toglia, Chiara
Kettler, Daniel
Kennedy, Fred
Dubowsky, Steven
GP IEEE
TI A Study of Cooperative Control of Self-Assembling Robots in Space with
Experimental Validation
SO ICRA: 2009 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION,
VOLS 1-7
SE IEEE International Conference on Robotics and Automation ICRA
LA English
DT Proceedings Paper
CT IEEE International Conference on Robotics and Automation
CY MAY 12-17, 2009
CL Kobe, JAPAN
SP IEEE
AB Modular self-assembling on-orbit robotic and satellite systems can be more reliable, have lower launch costs, and be more easily repaired and refueled. However, when individual modules assemble, many challenges and opportunities make the control of the assembled system complex. These issues include changes in inertial properties, and redundancy of actuators and sensors. Optimal control methods may be used to coordinate the control of the modules after assembly, insure good performance, and best utilize the combined resources of the assembly of modules. Simulation and experimental results compare this Cooperative algorithm's performance to that of an approach in which the control of the individual modules is not coordinated. Cooperative optimal control methods prove well-suited for controlling redundant, modular space systems.
C1 [Toglia, Chiara] Univ Roma La Sapienza, Rome, Italy.
[Kettler, Daniel] MIT, Cambridge, MA 02139 USA.
[Kennedy, Fred] US Air Force, Def Adv Res Projects Agcy, Colorado Springs, CO 80840 USA.
[Dubowsky, Steven] MIT, Dept Engn Mech, Cambridge, MA 02139 USA.
RP Toglia, C (reprint author), Univ Roma La Sapienza, Rome, Italy.
EM chiara.toglia@uniroma1.it; kettler@mit.edu; dubowsky@mit.edu
NR 15
TC 1
Z9 1
U1 0
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1050-4729
BN 978-1-4244-2788-8
J9 IEEE INT CONF ROBOT
PY 2009
BP 3847
EP +
PG 2
WC Automation & Control Systems; Robotics
SC Automation & Control Systems; Robotics
GA BOB06
UT WOS:000276080402002
ER
PT S
AU Han, J
Uchic, MD
Saif, T
AF Han, J.
Uchic, M. D.
Saif, T.
GP IEEE
TI NOVEL MEMS APPARATUS FOR IN SITU THERMO-MECHANICAL TENSILE TESTING OF
MATERIALS AT THE MICRO- AND NANO-SCALE
SO IEEE 22ND INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS
(MEMS 2009)
SE Proceedings IEEE Micro Electro Mechanical Systems
LA English
DT Proceedings Paper
CT 22nd International Conference on Micro Electro Mechanical Systems (MEMS)
CY JAN 25-29, 2009
CL Sorrento, ITALY
SP IEEE, Robot & Automat Soc
AB We present, for the first time, a MEMS-based test methodology that potentially enables elevated-temperature mechanical tensile testing of nano-and micro-scale samples within a SEM or TEM (T > 500 degrees C). Importantly, the test methodology allows for the samples to be fabricated separately from the MEMS-apparatus, a significant advancement from other test devices developed by some of the present authors [1]. Therefore the test methodology should be applicable to the study of a wide range of materials. Other advancements found in the methodology include a co-fabricated force calibration device, and a built-in thermocouple sensor to measure the stage temperature close to the sample.
C1 [Han, J.; Saif, T.] Univ Illinois, Champaign, IL 61820 USA.
[Uchic, M. D.] Wright Patterson AFB, Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Han, J (reprint author), Univ Illinois, Champaign, IL 61820 USA.
FU US Air Force [USAF- 52 12- STI- SC- 0004, USAF- 52 15- FT1SC- 0032];
National Science Foundation; DMR [0237400]; ECS [0304243]
FX The work was supported by the US Air Force grants USAF- 52 12- STI- SC-
0004, USAF- 52 15- FT1SC- 0032, and the National Science Foundation
grants DMR 0237400, ECS 0304243. The tensile testing stage was
fabricated at the Micro- Miniature Systems Lab and Micro- Nano
Technology Laboratory of University of Illinois at Urbana- Champaign.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1084-6999
BN 978-1-4244-2978-3
J9 PROC IEEE MICR ELECT
PY 2009
BP 80
EP 83
DI 10.1109/MEMSYS.2009.4805324
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BB1WX
UT WOS:000341431500021
ER
PT J
AU Nilsson, J
Ramachandran, S
Shay, TM
Shirakawa, A
AF Nilsson, Johan
Ramachandran, Siddharth
Shay, Thomas M.
Shirakawa, Akira
TI Introduction to the Issue on High-Power Fiber Lasers
SO IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
LA English
DT Editorial Material
C1 [Nilsson, Johan] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England.
[Ramachandran, Siddharth] OFS Labs, Somerset, NJ 08873 USA.
[Shay, Thomas M.] USAF, Res Lab, Directed Energy Directorate, Solid State Lasers Branch, Kirtland AFB, NM 87117 USA.
[Shirakawa, Akira] Univ Electrocommun, Inst Laser Sci, Tokyo 1828585, Japan.
RP Nilsson, J (reprint author), Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England.
EM jn@orc.soton.ac.uk; sidr@ieee.org; thomas.shay@kirtland.af.mil;
akira@ils.uec.ac.jp
NR 0
TC 9
Z9 11
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1077-260X
J9 IEEE J SEL TOP QUANT
JI IEEE J. Sel. Top. Quantum Electron.
PD JAN-FEB
PY 2009
VL 15
IS 1
BP 1
EP 2
DI 10.1109/JSTQE.2009.2014406
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA 406SL
UT WOS:000263315100001
ER
PT B
AU Holloway, EM
Lamont, GB
Peterson, GL
AF Holloway, Eric M.
Lamont, Gary B.
Peterson, Gilbert L.
GP IEEE
TI Network Security Using Self Organized Multi Agent Swarms
SO IEEE SYMPOSIUM ON COMPUTATIONAL INTELLIGENCE IN CYBER SECURITY
LA English
DT Proceedings Paper
CT IEEE Symposium on Computational Intelligence in Cyber Security
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
DE computer network security; cyberspace; agent swarms; self-organization
AB Computer network Cyber-security is a very serious concern in many commercial, industrial, and military environments. This paper proposes a new computer network security approach defined by self organized agent swarms (SOMAS) which provides a novel computer network security management framework based upon desired overall system behaviors. The SOMAS structure evolves based upon the partially observable Markov decision process (POMDP) formal model and the more complex Interactive-POMDP and Decentralized-POMDP models. Example swarm specific and network based behaviors are formalized and simulated. This paper illustrates through various statistical testing techniques, the significance of this proposed SOMAS architecture.
C1 [Holloway, Eric M.; Lamont, Gary B.; Peterson, Gilbert L.] USAF, Inst Technol, Grad Sch Engn & Management, Wright Patterson AFB,Dept Elect & Comp Engn, Dayton, OH 45433 USA.
RP Holloway, EM (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Wright Patterson AFB,Dept Elect & Comp Engn, Dayton, OH 45433 USA.
EM eric.holloway@afit.edu; gary.lamont@afit.edu; gilbert.peterson@afit.edu
NR 28
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2769-7
PY 2009
BP 144
EP 151
PG 8
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BME56
UT WOS:000272027200021
ER
PT J
AU Yang, C
Blasch, E
AF Yang, Chun
Blasch, Erik
TI Kalman Filtering with Nonlinear State Constraints
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID EQUALITY CONSTRAINTS; SYSTEMS
AB An analytic method was developed by D. Simon and T. L. Chia to incorporate linear state equality constraints into the Kalman filter. When the state constraint was nonlinear, linearization was employed to obtain an approximately linear constraint around the current state estimate. This linearized constrained Kalman filter is subject to approximation errors and may suffer from a lack of convergence. We present a method that allows exact use of second-order nonlinear state constraints. It is based on a computational algorithm that iteratively rinds the Lagrangian multiplier for the nonlinear constraints. Computer simulation results are presented to illustrate the algorithm.
C1 [Yang, Chun] Sigtem Technol Inc, San Mateo, CA 94402 USA.
[Blasch, Erik] USAF, Res Lab, RYAA, Wright Patterson AFB, OH 45433 USA.
RP Yang, C (reprint author), Sigtem Technol Inc, 1343 Parrott Dr, San Mateo, CA 94402 USA.
EM chunyang@sigtem.com
FU [FA8650-04-M-1624]; [FA8650-05-C-1808]
FX This research was supported in part under Contracts FA8650-04-M-1624 and
FA8650-05-C-1808.
NR 14
TC 70
Z9 79
U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9251
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JAN
PY 2009
VL 45
IS 1
BP 70
EP 84
PG 15
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA 435XH
UT WOS:000265376100007
ER
PT J
AU Sofka, J
Nikulin, VV
Skormin, VA
Hughes, DH
Legare, DJ
AF Sofka, Josef
Nikulin, Vladimir V.
Skormin, Victor A.
Hughes, David H.
Legare, David J.
TI Laser Communication Between Mobile Platforms
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID OMNI-WRIST III; NEW-GENERATION; DEVICES
AB Practical laser communication is impeded by the inherent strict requirements on agile and accurate steering of the laser beam over a wide angular range that are addressed by the pointing, acquisition, and tracking (PAT) system. While the vehicle carrying the optical instrumentation is in motion, a PAT system is required to compensate for the vibrations applied to the optical platform through the proper application of advanced control laws. This paper presents a feedforward vibration rejection system interacting with an optical tracking system to successfully perform the PAT task. It features a set of inertial navigation sensors to monitor the optical platform orientation, and the optical tracker monitoring the optical alignment errors. The control effort is defined on the basis of both signals and upon amplification drives the actuators of a novel singularity-free full-hemisphere-range robotic manipulator supporting the optical platform. The resultant technology enables two ground vehicles navigating through a difficult terrain to maintain optical connectivity sufficient for reliable laser communication. The paper presents the development of an extended Kalman filter "fusing" the inertial navigation sensor data, the design and implementation of the disturbance rejection/optical tracking control system, and the results of the experimental evaluation of the overall system performance.
C1 [Sofka, Josef; Nikulin, Vladimir V.; Skormin, Victor A.] SUNY Binghamton, Dept Elect & Comp Engn, Binghamton, NY 13904 USA.
[Hughes, David H.; Legare, David J.] USAF, Res Lab, Rome, NY 13441 USA.
RP Sofka, J (reprint author), SUNY Binghamton, Dept Elect & Comp Engn, 118 Moeller St, Binghamton, NY 13904 USA.
EM jozefsofka@hotmail.com
NR 15
TC 8
Z9 14
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9251
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JAN
PY 2009
VL 45
IS 1
BP 336
EP 346
PG 11
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA 435XH
UT WOS:000265376100026
ER
PT J
AU Kirawartich, P
Yakura, SJ
Islam, NE
AF Kirawartich, Phumin
Yakura, Susumu J.
Islam, Naz E.
TI Study of High-Power Wideband Terahertz-Pulse Generation Using Integrated
High-Speed Photoconductive Semiconductor Switches
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Finite-difference time-domain (FDTD) method; high-power photoconductive
antenna; terahertz (THz)-pulse generation
ID TEMPERATURE-GROWN GAAS; ANTENNAS; EMISSION
AB A 3-D finite-difference time-domain analysis of a photoconductive-semiconductor-switch-based terahertz (THz) source, integrated with a standard dipole and a large-aperture radiator, is presented. The simulation analysis is based on the coupling of semiconductor equations for charge transport with Maxwell electromagnetic equations. The simulation provides the transient field redistribution, carrier generation characteristics, and the field acceleration as a result of the bias voltage on the device, contributing to the nonlinear behavior of THz-pulse generation. A comparison of the radiation characteristics of the two antenna types shows that the large-aperture antenna produces approximately three times higher radiation amplitude and broader power spectrum than those produced by the dipole antenna.
C1 [Kirawartich, Phumin; Islam, Naz E.] Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65203 USA.
[Yakura, Susumu J.] USAF, Res Lab, Modeling & Effects Branch, High Power Microwave Div, Kirtland AFB, NM 87117 USA.
RP Kirawartich, P (reprint author), Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65203 USA.
EM kirawanichp@missouri.edu; susumu.yakura@kirtland.af.mil;
islamn@missouri.edu
NR 17
TC 14
Z9 19
U1 1
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD JAN
PY 2009
VL 37
IS 1
BP 219
EP 228
DI 10.1109/TPS.2008.2006978
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 392UJ
UT WOS:000262327400032
ER
PT J
AU Tong, XY
Wang, XO
Hopkinson, KM
AF Tong, Xiaoyang
Wang, Xiaoru
Hopkinson, Kenneth M.
TI The Modeling and Verification of Peer-to-Peer Negotiating Multiagent
Colored Petri Nets for Wide-Area Backup Protection
SO IEEE TRANSACTIONS ON POWER DELIVERY
LA English
DT Article
DE Colored petri nets (PNs); modeling; multiagent; peer-to-peer negotiating
agents; wide-area backup protection
ID ELECTRIC-POWER SYSTEMS; SOFTWARE
AB This paper focuses on the modeling and verification of a peer-to-peer wide-area backup protection (WABP) system. Agents located in a number of substation Intelligent Electronic Devices (IEDs) negotiate on a peer, or equal, basis. The agent-based wide-area backup protection scheme is able to find power-line faults and protection misoperations. A wide-area communication network based on IP technology is used to transmit shared information among the agents. A novel Agent-Oriented Peer-to-peer negotiating Colored Petri Net (AOPCPN) is proposed to implement the WABP system. The algorithms, design, and dynamic behavior of the WABP is evaluated in a simulated environment to demonstrate its benefits. The article begins by presenting the generic AOPCPN architecture and its formal definition. The AOPCPN model for the WABP multiagent system is evaluated according to one algorithm, which is detailed in this article. The WABP agent's autonomy, cooperation, parallel operation, and robustness are embodied in modules in order to ease the software engineering challenges in implementing and maintaining the agents. Three example scenarios illustrate the effectiveness of the Petri net model and its ability to dynamically respond to WABP misoperations; and fault conditions.
C1 [Tong, Xiaoyang; Wang, Xiaoru] SW Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Sichuan, Peoples R China.
[Hopkinson, Kenneth M.] USAF, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Tong, XY (reprint author), SW Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Sichuan, Peoples R China.
EM xytong@swjtu.cn; xrwang@swjtu.cn; kenneth.hopkinson@afit.edu
RI Tavares, Antonio/A-7115-2008
FU National Natural Science Foundation of China (NSFC) [90610026]
FX This work was supported by the National Natural Science Foundation of
China (NSFC) under Project 90610026.
NR 23
TC 5
Z9 8
U1 0
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0885-8977
J9 IEEE T POWER DELIVER
JI IEEE Trans. Power Deliv.
PD JAN
PY 2009
VL 24
IS 1
BP 61
EP 72
DI 10.1109/TPWRD.2008.2005661
PG 12
WC Engineering, Electrical & Electronic
SC Engineering
GA 391UX
UT WOS:000262260800008
ER
PT S
AU Kovalerchuk, B
Perlovsky, L
AF Kovalerchuk, Boris
Perlovsky, Leonid
GP IEEE
TI Fusion and Mining Spatial Data in Cyber-Physical Space with Dynamic
Logic of Phenomena
SO IJCNN: 2009 INTERNATIONAL JOINT CONFERENCE ON NEURAL NETWORKS, VOLS 1- 6
SE IEEE International Joint Conference on Neural Networks (IJCNN)
LA English
DT Proceedings Paper
CT International Joint Conference on Neural Networks
CY JUN 14-19, 2009
CL Atlanta, GA
SP Int Neural Network Soc, IEEE Computat Intelligence Soc
ID METHODOLOGY
AB Modeling of complex phenomena such as the mind presents tremendous computational complexity challenges. The Neural Modeling Fields (NMF) theory and Dynamic Logic of Phenomena (DLP) address these challenges in a non-traditional way. The main idea behind their success is matching the levels of uncertainty of the problem/model and the levels of uncertainty of the evaluation criterion used to identify the model. When a model becomes more certain then the evaluation criterion is also adjusted dynamically to match the adjusted model. This process mimics processes of the mind and natural evolution at the neural level. This paper describes the generalization of DLP for data fusion and mining of heterogeneous spatial objects in cyber-physical space.
C1 [Kovalerchuk, Boris] Cent Washington Univ, Dept Comp Sci, Ellensburg, WA 98926 USA.
[Perlovsky, Leonid] Harvard Univ, AF Res Lab, Bedford, MA 01731 USA.
RP Kovalerchuk, B (reprint author), Cent Washington Univ, Dept Comp Sci, Ellensburg, WA 98926 USA.
EM borisk@cwu.edu; leonid@seas.harvard.edu
FU US National Research Council; Air Force Research Laboratory
FX This work was supported in part by the US National Research Council and
the Air Force Research Laboratory.
NR 22
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2161-4393
BN 978-1-4244-3549-4
J9 IEEE IJCNN
PY 2009
BP 2440
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Hardware &
Architecture; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BQB78
UT WOS:000280591601097
ER
PT S
AU Sutton, DP
Carlisle, MC
Sarmiento, TA
Baird, LC
AF Sutton, Douglas P.
Carlisle, Martin C.
Sarmiento, Traci A.
Baird, Leemon C., III
GP IEEE
TI Partitioned Neural Networks
SO IJCNN: 2009 INTERNATIONAL JOINT CONFERENCE ON NEURAL NETWORKS, VOLS 1- 6
SE IEEE International Joint Conference on Neural Networks (IJCNN)
LA English
DT Proceedings Paper
CT International Joint Conference on Neural Networks
CY JUN 14-19, 2009
CL Atlanta, GA
SP Int Neural Network Soc, IEEE Computat Intelligence Soc
AB A new method is given for speeding up learning in a deep neural network with many hidden layers, by partially partitioning the network rather than fully interconnecting the layers. Empirical results are shown both for learning a simple Boolean function on a standard backprop network, and for learning two different, complex, real-world vision tasks on a more sophisticated convolutional network. In all cases, the performance of the proposed system was better than traditional systems. The partially-partitioned network outperformed both the fully-partitioned and fully-unpartitioned networks.
C1 [Sutton, Douglas P.; Carlisle, Martin C.; Sarmiento, Traci A.; Baird, Leemon C., III] USAF Acad, Colorado Springs, CO 80840 USA.
RP Sutton, DP (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1098-7576
BN 978-1-4244-3549-4
J9 IEEE IJCNN
PY 2009
BP 2870
EP 2875
PG 6
WC Computer Science, Artificial Intelligence; Computer Science, Hardware &
Architecture; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BQB78
UT WOS:000280591601162
ER
PT B
AU McCall, JF
Branam, RD
AF McCall, Jonathan F.
Branam, Richard D.
GP ASME
TI EFFECT OF RADIAL CURVATURE IN ROCKETS ON FILM COOLING ADIABATIC
EFFECTIVENESS AND JET WIDTH
SO IMECE 2008: HEAT TRANSFER, FLUID FLOWS, AND THERMAL SYSTEMS, VOL 10, PTS
A-C
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY OCT 31-NOV 06, 2008
CL Boston, MA
SP Amer Soc Mech Engineers
ID GAS
AB A computational study was performed to determine the effects of radial curvature on film cooling adiabatic effectiveness. This curvature is typically encountered in modern rocket combustion sections. Jet width and spanwise-averaged adiabatic effectiveness are observed to slightly decrease as radius of curvature decreases. This decrease impacts hole spacing requirements for adequate thermal management inside rocket combustors. Compound injection aggravates the effect so that the increased adiabatic efficiency usually associated is diminished due to a cradling effect of the radial curvature. The result is an increase in adiabatic efficiency immediately downstream of the hole and a decrease after 2 hole diameters, when compared to the flat plate. Furthermore, increasing the momentum ratio past I diminishes the effect of radial curvature on adiabatic effectiveness. Quantified understanding of radial curvature effects allow one to use flat plate effectiveness correlations for sizing of film cooling systems in internal flow situations, like rocket combustion chambers. This research is funded and supported by AFRL Propulsion Directorate.
C1 [McCall, Jonathan F.; Branam, Richard D.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP McCall, JF (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM jmccall@afit.edu; rbranam@afit.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4871-5
PY 2009
BP 539
EP 547
PG 9
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA BJE16
UT WOS:000265085300065
ER
PT B
AU Rutledge, JL
King, PI
Rivir, R
AF Rutledge, James L.
King, Paul I.
Rivir, Richard
GP ASME
TI CFD PREDICTIONS OF PULSED FILM COOLING HEAT FLUX ON A TURBINE BLADE
LEADING EDGE
SO IMECE 2008: HEAT TRANSFER, FLUID FLOWS, AND THERMAL SYSTEMS, VOL 10, PTS
A-C
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY OCT 31-NOV 06, 2008
CL Boston, MA
SP Amer Soc Mech Engineers
ID JET
AB Unsteadiness in film cooling jets may arise due to inherent unsteadiness of the blade-vane interaction or may be induced as a means of flow control. A computational study, was conducted to determine how leading edge film cooling performance is affected by pulsing the coolant flow. A cylindrical leading edge with a flat afterbody is used to simulate the turbine blade, leading edge region. A sin-le coolant hole was located 21.5 degrees from the leading edge, angled 20 degrees to the surface and 90 degrees from the streamwise direction. The leading edge diameter to hole diameter ratio is D/d = 18.7. Time resolved adiabatic effectiveness and heat transfer coefficient are used to calculate the temporally averaged. spatially resolved net heat flux reduction for several pulsing scenarios. The net heat flux reduction with pulsed film cooling is compared to the steady jet with matched average mass flow rate. Steady blowing ratios of M = 0.25 and 0.50 are each compared with two pulsed jet cases with matching averaging blowing ratio, (M) over bar, at a nondimensional frequency, F = 0.151 and ditty cycle, DC = 50%. Simulations were performed at Re(D) = 60000. Net heat flux is generally increased by pulsing the film coolant, with greater degradation for hi higher pulsation amplitudes relative to the average blowing ratio.
C1 [Rutledge, James L.; King, Paul I.; Rivir, Richard] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Rutledge, JL (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4871-5
PY 2009
BP 1139
EP 1149
PG 11
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA BJE16
UT WOS:000265085300137
ER
PT B
AU Breitzman, TD
Cook, BM
Schoeppner, GA
Iarve, EV
AF Breitzman, T. D.
Cook, B. M.
Schoeppner, G. A.
Iarve, E. V.
GP ASME
TI Optimal Design of a Composite Scarf Repair Under Uni-axial Tension
Loading
SO IMECE2008: PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING
CONGRESS AND EXPOSITION, VOL 4
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY OCT 31-NOV 06, 2008
CL Boston, MA
SP Amer Soc Mech Engineers
AB Benchmark un-notched strength testing was used to characterize material properties for 1M6/3501-6 composite material and to establish parameters for critical failure volume (CFV) (see [9]) analysis tools. Critical failure volume was used to predict the strength of scarfed composites, as well as composites having a scarf repair patch. Baseline repairs were created both without and with over-plies. Simplex optimization was performed on the analytical models to determine the repair stacking sequence that would result in the largest tensile strength for the repairs. The repair was optimized in the linear elastic regime, but strength predictions took into account both geometric nonlinearities of the respective materials and the material nonlinearities of the adhesive. Predicted strengths were in good agreement with experimental results, and the resultant optimal designs increased the strength of the repair under uni-axial tensile load by 10-20%.
C1 [Breitzman, T. D.; Cook, B. M.; Schoeppner, G. A.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Breitzman, TD (reprint author), USAF, Res Lab, 2941 Hobson Way, Wright Patterson AFB, OH 45433 USA.
NR 8
TC 0
Z9 0
U1 0
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4865-4
PY 2009
BP 293
EP 295
PG 3
WC Engineering, Manufacturing; Engineering, Mechanical
SC Engineering
GA BKP42
UT WOS:000268876700039
ER
PT B
AU Cook, ML
AF Cook, Martin L.
BE Morgan, MJ
TI The Day the World Changed? Reflections on 9/11 and US National Security
Strategy
SO IMPACT OF 9/11 ON RELIGION AND PHILOSOPHY: THE DAY THAT CHANGED
EVERYTHING
LA English
DT Article; Book Chapter
C1 [Cook, Martin L.] USN, War Coll, Stennis Space Ctr, MS 39529 USA.
[Cook, Martin L.] USAF Acad, Dept Philosophy, Colorado Springs, CO 80840 USA.
RP Cook, ML (reprint author), USN, War Coll, Stennis Space Ctr, MS 39529 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-230-10160-9
PY 2009
BP 233
EP 243
D2 10.1057/9780230101609
PG 11
WC Philosophy; Religion
SC Philosophy; Religion
GA BSI15
UT WOS:000284527100019
ER
PT J
AU Sclafani, JJ
Gottschalk, D
Waibel, KH
AF Sclafani, Joseph J.
Gottschalk, Douglas
Waibel, Kirk H.
TI Allergic Fungal Sinusitis
SO INFECTIONS IN MEDICINE
LA English
DT Editorial Material
C1 [Sclafani, Joseph J.] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Sclafani, JJ (reprint author), Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
NR 3
TC 0
Z9 0
U1 0
U2 1
PU SCP COMMUNICATIONS INC
PI NEW YORK
PA 134 W 29TH ST, NEW YORK, NY 10001-5304 USA
SN 0749-6524
J9 INFECT MED
JI Infect. Med.
PD JAN
PY 2009
VL 26
IS 1
BP 31
EP 32
PG 2
WC Infectious Diseases
SC Infectious Diseases
GA 399TB
UT WOS:000262821100006
ER
PT S
AU Sankaranarayanan, V
Upadhyaya, S
Kwiat, K
AF Sankaranarayanan, Vidyaraman
Upadhyaya, Shamblu
Kwiat, Kevin
BE Rao, HR
Upadhyaya, S
TI Human-Centered Security
SO INFORMATION ASSURANCE, SECURITY AND PRIVACY SERVICES
SE Handbooks in Information Systems
LA English
DT Article; Book Chapter
AB The human factor has long been viewed as the weakest link in the security chain. In this chapter, we examine the current manifestations of the weak human factor and present three different views on users. We then discuss the application or design principles from a user centric perspective, taking into account environmental issues and user preferences. In this context, threat modeling and risk analysis/estimation are studied, with principles that are specific to user centric design. We then present some new paradigms that have been proposed recently to incorporate the user in the Security loop in a meaningful manner, and elicit cooperation from noncompliant users. Lastly, we investigate the assessment techniques for a user centric security mechanism and point to some recent developments in simulations for the same.
C1 [Sankaranarayanan, Vidyaraman] Microsoft Corp, Redmond, WA 98052 USA.
[Upadhyaya, Shamblu] SUNY Buffalo, Buffalo, NY 14260 USA.
[Kwiat, Kevin] AF Res Lab, Griffiss AFB, NY 13441 USA.
RP Sankaranarayanan, V (reprint author), Microsoft Corp, 1 Microsoft Way, Redmond, WA 98052 USA.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU EMERALD GROUP PUBLISHING LIMITED
PI BINGLEY
PA HOWARD HOUSE, WAGON LANE, BINGLEY, W YORKSHIRE BD16 1WA, ENGLAND
SN 1574-0145
BN 978-1-84855-194-7
J9 HANDB INFO SYST
PY 2009
VL 4
BP 235
EP 258
PG 24
WC Business; Computer Science, Information Systems; Computer Science,
Theory & Methods; Information Science & Library Science; Management
SC Business & Economics; Computer Science; Information Science & Library
Science
GA BLN35
UT WOS:000270580300008
ER
PT J
AU Subramanyam, G
Patterson, M
Leedy, K
Neidhard, R
Varanasi, C
Zhang, CH
Steinhauer, G
AF Subramanyam, Guru
Patterson, Mark
Leedy, Kevin
Neidhard, Robert
Varanasi, Chakrapani
Zhang, Chenhao
Steinhauer, Gregg
TI Thickness Dependent Properties of Barium Strontium Titanate Thin-Film
Varactors
SO INTEGRATED FERROELECTRICS
LA English
DT Article; Proceedings Paper
CT 21st International Symposium on Integrated Ferroelectrics and
Functionalities
CY SEP 27-30, 2009
CL Colorado Springs, CO
ID MICROWAVE APPLICATIONS
AB Ba(0.6)Sr(0.4)TiO(3) (BST) thin-films with large dielectric tunability as high as 5.8:1 were obtained using a large area pulsed laser deposition process, with low loss-tangents below 0.01 at zero-bias and 10 GHz. This paper summarizes experimental results obtained on large area processed BST thin film varactors. Varactors with 0.6 mu m thick BST films exhibited large dielectric tunability, the relative dielectric permittivity at zero bias of 1280 tuned to 220 at 20 V, at an electric field of 333 kV/cm. The leakage current through the BST film was below 1 nA up to 10 V dc bias. The Quality factor (Q) exceeded 500 at relatively low 10 V dc bias for both 0.6 and 1 mu m thick BST varactors.
C1 [Subramanyam, Guru; Patterson, Mark; Zhang, Chenhao] Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
[Leedy, Kevin; Neidhard, Robert] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Varanasi, Chakrapani] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Steinhauer, Gregg] Analog Bridge Inc, Beavercreek, OH 45434 USA.
RP Subramanyam, G (reprint author), Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
EM Guru.Subramanyam@notes.udayton.edu
RI Leedy, Kevin/E-9968-2010
NR 7
TC 2
Z9 2
U1 1
U2 7
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1058-4587
J9 INTEGR FERROELECTR
JI Integr. Ferroelectr.
PY 2009
VL 112
BP 53
EP 59
DI 10.1080/10584587.2009.484687
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied; Physics,
Condensed Matter
SC Engineering; Physics
GA 618ZP
UT WOS:000279395900007
ER
PT J
AU Lu, YL
Reinhardt, K
Brown, GJ
AF Lu, Yalin
Reinhardt, Kitt
Brown, Gail J.
TI Nonlinear Refraction and Nonlinear Scattering in Highly Oriented Lead
Magnesium Niobate-Lead Titanate Multilayers
SO INTEGRATED FERROELECTRICS
LA English
DT Article
ID THIN-FILMS
AB Optical limiting in highly oriented lead magnesium niobate-lead titanate rhombohedral and tetragonal multilayers has been investigated using nanosecond laser pulses at 1.064 mu m wavelength. Limiting threshold for the two such multilayers having a period of 20 and 218 nm was determined at the level similar to 220 mu J/pulse. Nonlinear optical scattering from domain walls was used to explain the observed limiting behavior. Possible formation of nonlinear refraction grating under a strong light field superposing to the periodic multilayer structure was also discussed.
C1 [Lu, Yalin] USAF Acad, Dept Phys, LORC, Colorado Springs, CO 80840 USA.
[Reinhardt, Kitt] AFOSR NE, Arlington, VA 22203 USA.
[Brown, Gail J.] AFRL RXPSO, Wright Patterson AFB, OH 45433 USA.
RP Lu, YL (reprint author), USAF Acad, Dept Phys, LORC, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.edu
NR 10
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1058-4587
J9 INTEGR FERROELECTR
JI Integr. Ferroelectr.
PY 2009
VL 110
BP 115
EP 122
DI 10.1080/10584580903435588
PG 8
WC Engineering, Electrical & Electronic; Physics, Applied; Physics,
Condensed Matter
SC Engineering; Physics
GA 535KQ
UT WOS:000272967500013
ER
PT J
AU Lu, YL
Brown, GJ
Reinhardt, K
AF Lu, Yalin
Brown, Gail J.
Reinhardt, Kitt
TI Negative Refraction Oxide Superlattices
SO INTEGRATED FERROELECTRICS
LA English
DT Article
AB A possible physical mechanism toward realizing negative refraction is theoretically discussed using an oxide-based r superlattice structure. In the superlattice configuration, phonon spectrum coupling among electromagnetic wave, dielectric dipole and magnetic moment vibration is used to realize both negative permeability and negative permittivity in a short frequency range after the resonance. Further material selection has been preliminarily discussed, and the focus will be the realization of such superlattice NIMs for optical frequencies.
C1 [Lu, Yalin] USAF Acad, Dept Phys, LORC, Colorado Springs, CO 80840 USA.
[Brown, Gail J.] AFRL RXPSO, Wright Patterson AFB, OH 45433 USA.
[Reinhardt, Kitt] AFOSR NE, Arlington, VA 22203 USA.
RP Lu, YL (reprint author), USAF Acad, Dept Phys, LORC, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.edu
NR 6
TC 0
Z9 0
U1 0
U2 2
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1058-4587
J9 INTEGR FERROELECTR
JI Integr. Ferroelectr.
PY 2009
VL 110
BP 123
EP 130
DI 10.1080/10584580903435604
PG 8
WC Engineering, Electrical & Electronic; Physics, Applied; Physics,
Condensed Matter
SC Engineering; Physics
GA 535KQ
UT WOS:000272967500014
ER
PT B
AU Derdzinski, JL
AF Derdzinski, Joseph L.
BA Derdzinski, JL
BF Derdzinski, JL
TI Internal Security Services in Liberalizing States Transitions, Turmoil,
and (In)Security Introduction
SO INTERNAL SECURITY SERVICES IN LIBERALIZING STATES: TRANSITIONS, TURMOIL,
AND (IN)SECURITY
LA English
DT Editorial Material; Book Chapter
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Derdzinski, JL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9669-8; 978-0-7546-7504-4
PY 2009
BP 1
EP +
PG 29
WC Political Science
SC Government & Law
GA BA4WC
UT WOS:000336372000001
ER
PT B
AU Derdzinski, JL
AF Derdzinski, Joseph L.
BA Derdzinski, JL
BF Derdzinski, JL
TI Democratization and the Internal Security Services: Principal Approaches
and Findings
SO INTERNAL SECURITY SERVICES IN LIBERALIZING STATES: TRANSITIONS, TURMOIL,
AND (IN)SECURITY
LA English
DT Article; Book Chapter
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Derdzinski, JL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9669-8; 978-0-7546-7504-4
PY 2009
BP 13
EP 43
PG 31
WC Political Science
SC Government & Law
GA BA4WC
UT WOS:000336372000002
ER
PT B
AU Derdzinski, JL
AF Derdzinski, Joseph L.
BA Derdzinski, JL
BF Derdzinski, JL
TI Commander of the Faithful: Morocco, the King, and the Internal Security
Services
SO INTERNAL SECURITY SERVICES IN LIBERALIZING STATES: TRANSITIONS, TURMOIL,
AND (IN)SECURITY
LA English
DT Article; Book Chapter
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Derdzinski, JL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9669-8; 978-0-7546-7504-4
PY 2009
BP 45
EP 80
PG 36
WC Political Science
SC Government & Law
GA BA4WC
UT WOS:000336372000003
ER
PT B
AU Derdzinski, JL
AF Derdzinski, Joseph L.
BA Derdzinski, JL
BF Derdzinski, JL
TI Indonesia's Intelligence and Security Services: The White of my Bones?
SO INTERNAL SECURITY SERVICES IN LIBERALIZING STATES: TRANSITIONS, TURMOIL,
AND (IN)SECURITY
LA English
DT Article; Book Chapter
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Derdzinski, JL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9669-8; 978-0-7546-7504-4
PY 2009
BP 81
EP 121
PG 41
WC Political Science
SC Government & Law
GA BA4WC
UT WOS:000336372000004
ER
PT B
AU Derdzinski, JL
AF Derdzinski, Joseph L.
BA Derdzinski, JL
BF Derdzinski, JL
TI Reforming the Security Sector: Findings and Recommendations
SO INTERNAL SECURITY SERVICES IN LIBERALIZING STATES: TRANSITIONS, TURMOIL,
AND (IN)SECURITY
LA English
DT Article; Book Chapter
C1 US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Derdzinski, JL (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9669-8; 978-0-7546-7504-4
PY 2009
BP 123
EP 146
PG 24
WC Political Science
SC Government & Law
GA BA4WC
UT WOS:000336372000005
ER
PT B
AU Moore, GW
White, ED
AF Moore, Gary W.
White, Edward D., III
BE Thai, KV
TI Regression Approach for Estimating Procurement Cost
SO INTERNATIONAL HANDBOOK OF PUBLIC PROCUREMENT
SE Public Administration and Public Policy
LA English
DT Article; Book Chapter
C1 [Moore, Gary W.] USAF, Inst Technol, Sch Syst & Logist, Wright Patterson AFB, OH 45433 USA.
[White, Edward D., III] USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
RP Moore, GW (reprint author), USAF, Inst Technol, Sch Syst & Logist, Wright Patterson AFB, OH 45433 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-5457-6
J9 PUBLIC ADM PUBLIC PO
PY 2009
VL 146
BP 763
EP 778
PG 16
WC Public Administration
SC Public Administration
GA BJO25
UT WOS:000266890200040
ER
PT J
AU Schmidt, MJ
Cazacu, O
Green, ML
AF Schmidt, Mailin J.
Cazacu, Oana
Green, Mark L.
TI Experimental and theoretical investigation of the high-pressure behavior
of concrete
SO INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN
GEOMECHANICS
LA English
DT Article
DE concrete; high confinement; compressibility; viscoplasticity
ID DAMAGE; MODEL
AB The results of an experimental study aimed at characterizing the behavior of concrete for high confining Pressures (LIP to 500 MPa) are reported. The main characteristics of the response under deviatoric conditions are quasi-linearity in the elastic regime, stress-path dependency, and gradual change from compressibility to dilatanCy under increasing deviatoric stress. By performing the cyclic triaxial cornpression tests with several load-creep-unload and reload cycles, the time influence on the overall behavior was detected. Further, whether the main features of the observed behavior can be described within the framework of elastic/viscoplasticity theory was investigated. For this purpose, Cristescu's (Rock Rheology. Kluwer Academic Publishers: The Netherlands, 1989) approach was used. It was shown that the proposed elastic/viscoplastic model captures the main features of concrete behavior at. high pressures. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Schmidt, Mailin J.; Green, Mark L.] USAF, Res Lab, Eglin AFB, FL 32542 USA.
[Cazacu, Oana] Univ Florida, REEF, Dept Mech & Aerosp Engn, Shalimar, FL 32579 USA.
RP Schmidt, MJ (reprint author), USAF, Res Lab, Eglin AFB, FL 32542 USA.
EM martin.schmidt@egli.af.mil
RI Cazacu, Oana/L-4635-2016
OI Cazacu, Oana/0000-0002-2499-9096
NR 25
TC 11
Z9 11
U1 0
U2 7
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0363-9061
J9 INT J NUMER ANAL MET
JI Int. J. Numer. Anal. Methods Geomech.
PD JAN
PY 2009
VL 33
IS 1
BP 1
EP 23
DI 10.1002/nag.700
PG 23
WC Engineering, Geological; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA 392AW
UT WOS:000262276300001
ER
PT J
AU Mailloux, RJ
Santarelli, SG
Roberts, TM
Luu, D
AF Mailloux, R. J.
Santarelli, S. G.
Roberts, T. M.
Luu, D.
TI Irregular Polyomino-Shaped Subarrays for Space-Based Active Arrays
SO INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
LA English
DT Article
ID PHASED-ARRAY; ANTENNA
AB This paper presents new results showing the application of polyomino-based subarrays to limited field of view and wideband, wide-angle scanning. This technology can reduce the number of phase controls in arrays used for limited sector coverage or the number of time delay devices for wideband radar or communications, and so can reduce the cost of space-based active arrays. We concentrate on the wideband application. Results are presented by comparing the gain and peak sidelobe results of irregular polyomino subarray-based arrays with those of rectangular subarrays. It is shown that using irregular polyomino subarrays can result in a major decrease in sidelobes while presenting, in most cases, only a few tenths of a dB gain reduction compared to rectangular subarrays. Copyright (C) 2009 R. J. Mailloux et al.
C1 [Mailloux, R. J.] Univ Massachusetts, Dept Elect & Comp Engn, Amherst, MA 01003 USA.
[Mailloux, R. J.; Santarelli, S. G.; Roberts, T. M.; Luu, D.] USAF, Res Lab, Sensors Directorate, Div Electromagnet Technol,Antenna Technol Branch, Bedford, MA 01731 USA.
RP Mailloux, RJ (reprint author), Univ Massachusetts, Dept Elect & Comp Engn, Amherst, MA 01003 USA.
EM robert.mailloux@hanscom.af.mil
FU Air Force Office of Scientific Research; Center for Advanced Sensor and
Communications Antennas, Department of Electrical and Computer
Engineering, University of Massachusetts, Amherst, Mass, USA
FX This work was supported in part by the Air Force Office of Scientific
Research, under Dr. A. Nachman, and in part by the Center for Advanced
Sensor and Communications Antennas, Department of Electrical and
Computer Engineering, University of Massachusetts, Amherst, Mass, USA.
The work was conducted at the Sensors Directorate, Air Force Research
Laboratory, Hanscom AFB, Mass, USA.
NR 16
TC 13
Z9 13
U1 1
U2 3
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-5869
J9 INT J ANTENN PROPAG
JI Int. J. Antennas Propag.
PY 2009
AR 956524
DI 10.1155/2009/956524
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 689RS
UT WOS:000284947000001
ER
PT J
AU Ahn, JM
Mall, S
Ahn, JM
AF Ahn, Joon-Mo
Mall, Shankar
Ahn, Joon-Mo
TI Frequency Effects on Fatigue Behavior of a Silicon Carbide
Fiber-Reinforced Glass-Ceramic Composite (SiC/MAS)
SO INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
LA English
DT Article
ID MATRIX COMPOSITES; ELEVATED-TEMPERATURE; ROOM-TEMPERATURE; INTERPHASES;
DEPENDENCE; LAMINATE
AB The effects of cyclic frequency on the fatigue behavior of silicon carbide (Nicalon) fiber-reinforced glass-ceramic matrix (SiC/magnesium aluminosilicate (MAS)) were investigated. Tension-tension fatigue tests were conducted at two frequencies, 10 and 900 Hz, to establish stress versus cycles to failure (S-N) relationships. Cycles to failure at a given stress level decreased with an increase of the applied frequency. Analysis of damage mechanisms suggests that there was an enhancement of fiber/matrix interfacial bonding at the higher frequency due to the formation of SiO(2) from the reaction of oxygen species of the matrix with SiC of the fiber.
C1 [Ahn, Joon-Mo; Mall, Shankar] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Ahn, Joon-Mo] Agcy Def Dev, Tech Dev Ctr, Taejon 305600, South Korea.
RP Ahn, JM (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM shankar.mall@afit.edu
NR 29
TC 3
Z9 3
U1 1
U2 11
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1546-542X
J9 INT J APPL CERAM TEC
JI Int. J. Appl. Ceram. Technol.
PY 2009
VL 6
IS 1
BP 45
EP 52
DI 10.1111/j.1744-7402.2008.02251.x
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA 391II
UT WOS:000262226600007
ER
PT J
AU Fadare, O
Renshaw, IL
Rubin, C
AF Fadare, Oluwole
Renshaw, Idris L.
Rubin, Christopher
TI Pleomorphic Lymphoepithelioma-like Carcinoma of the Urinary Bladder
SO INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY
LA English
DT Article
DE Bladder; lymphoepithelioma; lymphoepithelioma-like
AB Lymphoepithelioma-like carcinoma (LELC) of the urinary bladder is often mixed with conventional transitional cell carcinoma and/or other histotypes. The pathologist's determination of the morphologic purity of a given LELC at the biopsy stage is a clinically relevant endeavour, because there is some anecdotal evidence suggesting that pure or predominant LELC may be comparatively chemosensitive and have a favorable prognostic profile, which may potentially offer the possibility of effective therapy without bladder resection. The precise degree of cellular pleomorphism that is allowed in a pure LELC is unclear. We describe herein an otherwise conventional and pure LELC that showed, in a localized area that constituted approximately 25% of the overall tumor volume, a two to six fold variation in nuclear size, including multinucleated tumor cells. These pleomorphic areas were set in the same lymphoplasmacytic infiltrate as their conventional counterparts, and similarly displayed cellular syncytia. We performed a detailed immunophenotypic comparison between the conventional areas and the pleomorphic areas. No significant differences were found between the 2 areas in overall lymphoplasmacytic or histiocytic density, lymphocytic CD4/CD8 ratio, and lymphoplasmacytic kappa/lambda ratio. Similarly, both displayed similar qualitative and quantitative staining indices for p53, Ki67, cytokeratin AE1/AE3 and p16(INKa). Scattered cells were cytoplasmically beta-catenin positive exclusively in the pleomorphic areas; however these cells were not notably larger than the cells in the conventional areas. Both components were immunohistochemically negative for HMB-45, CD1a, the estrogen receptor, Epstein-Barr virus, CD117, D240, CD56, cytokeratin 20 and chromogranin. Clinicopathologic analysis of a series of cases is required to establish if there is any significance to nuclear pleomorphism in LELC. However, the phenotypic similarity between the 2 areas in this case, the intimate admixture of the pleomorphic cells with the lymphoplasmacytic infiltrate, and their syncytial pattern of growth, all suggest that pure LELC may display marked nuclear pleomorphism, and that this finding may not, in of itself, be a valid basis for removing a case from the "pure" group.
C1 [Fadare, Oluwole] Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
[Fadare, Oluwole] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
[Renshaw, Idris L.; Rubin, Christopher] Vanguard Pathol Associates, Austin, TX USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
NR 14
TC 3
Z9 4
U1 0
U2 0
PU E-CENTURY PUBLISHING CORP
PI MADISON
PA 40 WHITE OAKS LN, MADISON, WI 53711 USA
SN 1936-2625
J9 INT J CLIN EXP PATHO
JI Int. J. Clin. Exp. Pathol.
PY 2009
VL 2
IS 2
BP 194
EP 199
PG 6
WC Oncology; Pathology
SC Oncology; Pathology
GA V18RL
UT WOS:000208021800011
PM 19079656
ER
PT J
AU Fadare, O
Zheng, WX
AF Fadare, Oluwole
Zheng, Wenxin
TI Insights into Endometrial Serous Carcinogenesis and Progression
SO INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY
LA English
DT Review
DE Endometrial serous carcinoma; endometrial glandular dysplasia;
endometrial intraepithelial carcinoma; p53; cadherins; claudins; CDKs;
MDM2 and HER2/neu (erb-B2)
AB Endometrial serous carcinomas (ESC) constitute only approximately 10% of endometrial cancers, but have a substantially higher case-fatality rate than their more common endometrioid counterparts. The precise composite of factors driving endometrial serous carcinogenesis and progression remain largely unknown, but we attempt to review the current state of knowledge in this report. ESC probably do not evolve through a single pathway, and their underlying molecular events probably occur early in their evolution. TP53 gene mutations occur in 22.7 to 96% of cases, and p53 protein overexpression is seen in approximately 76%. By gene expression profiling, p16 is upregulated in ESC significantly above both normal endometrial cells and endometrioid carcinomas, and 92-100% of cases display diffuse expression of the p16 protein by immunohistochemistry (IHC). Together, these findings suggest dysregulation of both the p16(INKA)/Cyclin D-CDK/pRb-E2F and the ARF-MDM2-p53 cell cycle pathways in ESC. By IHC, HER2/neu is overexpressed (2+ or 3+) in approximately 32.1% of ESC, and approximately 54.5% of cases scored as 2+ or 3+ by IHC display c-erbB2 gene amplification as assessed by fluorescent in situ hybridization. Genetic instability, typically manifested as loss of heterozygosity in multiple chromosomes, is a common feature of ESC, and one study found loss of heterozygosity at 1p32-33 in 63% of cases. A subset of ESC display protein expression patterns that are characteristic of high grade endometrial carcinomas, including loss of the metastasis suppressor CD82 (KAI-1) and epithelial-to-mesenchymal transformation, the latter manifested as E-cadherin downregulation, P-cadherin upregulation, and expression of epithelial-to-mesenchymal transformation-related molecules such as zinc-finger E-box-binding homeobox 1 (ZEB1) and focal adhesion kinase. Preliminary data suggests differential patterns of expression in ESC of some isoforms of claudins, proteases, the tumor invasiveness and progression-associated oncofetal protein insulin-like growth factor II mRNA-binding protein 3 (IMP3), as well as a variety of other molecules. At the morphologic level, evidence that indicates that endometrial glandular dysplasia (EmGD) is the most likely morphologically recognizable precursor lesion to ESC is presented. We advocate use of the term endometrial intraepithelial carcinoma (EIC, or its other appellations) only as a morphologic descriptor and never as a diagnostic/pathologic statement of biologic potential. Given its potential for extrauterine extension, we consider the lesions described as EIC, when present in isolation, as examples of localized ESC, and patients should be managed as such. Morphologically normal, p53 immunoreactive endometrial cells (the so-called "p53 signatures"), show a statistically significant association with ESC, display p53 mutations in a significant subset, and form the start of a progression model, outlined herein, from p53 signatures to EmGD to localized ESC to the more conventionally invasive neoplasm. The identification of a morphologically-recognizable precursor holds the promise of early detection of ESC, with the attendant reduction in its overall associated mortality rate. Deciphering the molecular basis for endometrial serous carcinogenesis should uncover potential targets for diagnosis, therapy, and/or disease surveillance.
C1 [Fadare, Oluwole] Wilford Hall USAF Med Ctr, Dept Pathol, San Antonio, TX USA.
[Fadare, Oluwole] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
[Zheng, Wenxin] Univ Arizona, Coll Med, Dept Pathol, Tucson, AZ 85721 USA.
[Zheng, Wenxin] Univ Arizona, Coll Med, Dept Obstet & Gynecol, Tucson, AZ USA.
[Zheng, Wenxin] Univ Arizona, Arizona Canc Ctr, Tucson, AZ USA.
[Zheng, Wenxin] Shandong Univ, Coll Med, Jinan, Peoples R China.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com; zhengw@email.arizona.edu
FU Women's Cancer Division of Arizona Cancer Center, University of Arizona,
USA; [P30 CA23074]
FX We thank Dr. Xi Zhang for providing TP53 gene sequencing results from
laser capture microdissected (LCM) samples. The work is supported in
part by P30 CA23074 and grant from Women's Cancer Division of Arizona
Cancer Center, University of Arizona, USA.
NR 173
TC 25
Z9 27
U1 0
U2 3
PU E-CENTURY PUBLISHING CORP
PI MADISON
PA 40 WHITE OAKS LN, MADISON, WI 53711 USA
SN 1936-2625
J9 INT J CLIN EXP PATHO
JI Int. J. Clin. Exp. Pathol.
PY 2009
VL 2
IS 5
BP 411
EP 432
PG 22
WC Oncology; Pathology
SC Oncology; Pathology
GA V18RO
UT WOS:000208022100001
PM 19294001
ER
PT J
AU Green, MG
Jensen, D
Seepersad, CC
Wood, KL
AF Green, Matthew G.
Jensen, Dan
Seepersad, Carolyn C.
Wood, Kristin L.
TI Design for Frontier Contexts: Classroom Assessment of a New Design
Methodology with Humanitarian Applications
SO INTERNATIONAL JOURNAL OF ENGINEERING EDUCATION
LA English
DT Article
DE customer needs; latent needs; task clarification; design methods;
developing countries; assistive technology
AB A new design method for frontier contexts is given a classroom assessment. The method adds the formal consideration of the design context to traditional customer needs assessment. Testing under both controlled and classroom conditions shows the new method is extremely effective, easy to use and well received by students. Implementation at three US schools has shown positive results signifying broad applicability in education as well as field practice. Here we present the essence of the method, results of testing and examples.
C1 [Green, Matthew G.] LeTourneau Univ, Longview, TX USA.
[Jensen, Dan] USAF Acad, Colorado Springs, CO USA.
[Wood, Kristin L.] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
RP Green, MG (reprint author), LeTourneau Univ, Longview, TX USA.
EM MatthewGreen@letu.edu; dan.jensen@usafa.af.mil;
ccseepersad@mail.utexas.edu; wood@mail.utexas.edu
FU National Defense Science and Engineering Graduate Fellowship program;
National Science Foundation; Cullen Trust
FX The authors would like to recognize the contributions of Julie Linsey's
work on systematic methods and tools for innovative and efficient
conceptual design, with particular focus on design-by-analogy. The work
reported in this document was made possible, in part, by the National
Defense Science and Engineering Graduate Fellowship program, the
University of Texas at Austin College of Engineering, a grant from the
National Science Foundation and the Cullen Trust Endowed Professorship
in Engineering No. 1. Any opinions, findings or recommendations are
those of the authors and do not necessarily reflect the views of the
sponsors.
NR 39
TC 4
Z9 4
U1 0
U2 4
PU TEMPUS PUBLICATIONS
PI DURRUS, BANTRY
PA IJEE , ROSSMORE,, DURRUS, BANTRY, COUNTY CORK 00000, IRELAND
SN 0949-149X
J9 INT J ENG EDUC
JI Int. J. Eng. Educ
PY 2009
VL 25
IS 5
BP 1029
EP 1045
PG 17
WC Education, Scientific Disciplines; Engineering, Multidisciplinary
SC Education & Educational Research; Engineering
GA 522BD
UT WOS:000271971800020
ER
PT J
AU Fadare, O
AF Fadare, Oluwole
TI Recent Developments on the Significance and Pathogenesis of Lymph Node
Involvement in Ovarian Serous Tumors of Low Malignant Potential
(Borderline Tumors)
SO INTERNATIONAL JOURNAL OF GYNECOLOGICAL CANCER
LA English
DT Article
DE Borderline; Ovary; Serous borderline tumors of low malignant potential;
Lymph node
ID HYPERPLASTIC MESOTHELIAL CELLS; BENIGN GLANDULAR INCLUSIONS; FOLLOW-UP;
STROMAL MICROINVASION; PERITONEAL IMPLANTS; METASTASES; CARCINOMA;
CANCER; INVASION; ORIGIN
AB It approximately 27% of patients that were surgically staged for ovarian serous borderline tumors (ovarian serous tumors of low malignant potential), regional lymph nodes, most commonly the pelvic and paraaortic groups, display morphologically similar epithelia] clusters. Lymph nodes above the diaphragm may also be involved. Lymph node involvement doe, not adversely impact the overall survival of patients with Ovarian serous borderline tumors, but there is controversy as to whether this finding is associated with a decrease in recurrence-free survival. Nodular aggregates Of epithelium greater than I mm in maximum dimension, as compared with all other patterns of nodal involvement, have been associated with reduced recurrence-free survival. The lymph nodes may also be the site of recurrence and/or progression to carcinoma of an ovarian serous borderline tumor. Recent molecular and morphologic data Suggest that although most nodal implants are indeed metastatic from their synchronous ovarian neoplasms, a small subset arise de novo from nodal endosalpingiosis. The precise mechanistic basis for how these noninvasive neoplasms achieve nodal metastasis is unclear. However, because most patients with nodal metastases also have peritoneal implants, tumors that are ovary-confined and without ovarian surface involvement are rarely associated with nodal involvement, microinvasive borderline tumors frequently display lymphatic vessel involvement yet show a remarkably low frequency Of nodal involvement, in conjunction with the recent finding that node-positive and node-negative tumors display no significant differences in lymphatic vessel density, suggest that the route of spread to lymph nodes in most cases is via the peritoneal and not tumoral lymphatics.
C1 [Fadare, Oluwole] Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
[Fadare, Oluwole] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com
NR 77
TC 15
Z9 17
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1048-891X
J9 INT J GYNECOL CANCER
JI Int. J. Gynecol. Cancer
PD JAN
PY 2009
VL 19
IS 1
BP 103
EP 108
DI 10.1111/IGC.0b013e3181991a49
PG 6
WC Oncology; Obstetrics & Gynecology
SC Oncology; Obstetrics & Gynecology
GA 457ZB
UT WOS:000266976100019
PM 19258950
ER
PT J
AU Gadhamshetty, V
Johnson, DC
Nirmalakhandan, N
Smith, GB
Deng, SG
AF Gadhamshetty, Venkataramana
Johnson, David C.
Nirmalakhandan, Nagamany
Smith, Geoff B.
Deng, Shuguang
TI Dark and acidic conditions for fermentative hydrogen production
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article
DE Biohydrogen; Fermentation; Hydrogen; Low pH; Unbuffered; Biofuel;
Compost
ID BIOHYDROGEN PRODUCTION; WASTE-WATER; PH; OPTIMIZATION; SUBSTRATE
AB Bacterial consortium capable of producing hydrogen in low pH (LpH) range of 3.3-4.3 is reported in this study. This operational pH is two full units below that of previously reported hydrogen producing organisms. Low pH inocula were derived from a batch bio-hydrogen reactor inoculated with heat treated compost (similar to 120 degrees C, 2 h), which was allowed to accumulate biogas to reach three atmospheres of equivalent headspace pressure and system pH of 3.0. Acclimation effect had positive influence on H(2) production and LpH inocula were passed sequentially into more than 15 generations to achieve consistent conversion efficiency and hydrogen composition, further tested in 23 other culture cycles. With hydrogen composition in the headspace ranging from 50% to 60%, conversion efficiency of similar to 43% achieved in LpH systems is comparable to that of other buffered systems. Feasibility of hydrogen production in LpH systems is demonstrated in unbuffered reactors under intermittent pressure release conditions and in absence of initial pH adjustment and stirring. Conversion efficiencies, however, decreased by similar to 1-fold for each 3 degrees C drop below the optimum temperature of 22 degrees C. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
C1 [Gadhamshetty, Venkataramana] USAF, Res Lab, Panama City, FL 32403 USA.
[Johnson, David C.] New Mexico State Univ, Inst Energy & Environm, Las Cruces, NM 88003 USA.
[Nirmalakhandan, Nagamany] New Mexico State Univ, Dept Civil Engn, Las Cruces, NM 88003 USA.
[Smith, Geoff B.] New Mexico State Univ, Dept Biol, Las Cruces, NM 88003 USA.
[Deng, Shuguang] New Mexico State Univ, Dept Chem Engn, Las Cruces, NM 88003 USA.
RP Gadhamshetty, V (reprint author), USAF, Res Lab, 139 Barnes Dr, Panama City, FL 32403 USA.
EM vgadhamshetty@fairpoint.net
RI Gadhamshetty, Venkataramana/B-5609-2009; Nirmalakhandan,
Nagamany/A-3071-2008; Deng, Shuguang/G-5926-2011
OI Nirmalakhandan, Nagamany/0000-0003-2002-909X; Deng,
Shuguang/0000-0003-2892-3504
FU Office of Vice President for Research at New Mexico State University;
National Science Foundation's CBET Division [0607175]
FX This study was funded in part by the Office of Vice President for
Research at New Mexico State University and by the National Science
Foundation's CBET Division, under Grant No 0607175.
NR 22
TC 5
Z9 5
U1 0
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD JAN
PY 2009
VL 34
IS 2
BP 821
EP 826
DI 10.1016/j.ijhydene.2008.11.040
PG 6
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA 407TD
UT WOS:000263386300024
ER
PT J
AU Akins, RS
Nair, M
Mark, RJ
Anderson, PJ
Quick, D
AF Akins, R. S.
Nair, M.
Mark, R. J.
Anderson, P. J.
Quick, D.
TI Bexxar (Tositumomab) Protocol CP98-020: Results with I-131 Labeled
Antibody in Patients with Follicular Non-Hodgkin's Lymphoma Refractory
to Chemotherapy and Rituxan (Rituximab): 5 Year Follow-up in 60 Cases
SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
LA English
DT Meeting Abstract
CT 51st Annual Meeting of the American-Society-for-Radiation-Oncology
CY NOV 01-05, 2009
CL Chicago, IL
SP Amer Soc Radiat Oncol
C1 [Akins, R. S.] Wilford Hall USAF Med Ctr, Lackland AFB, TX USA.
[Nair, M.; Mark, R. J.; Anderson, P. J.; Quick, D.] Joe Arrington Canc Ctr, Lubbock, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0360-3016
J9 INT J RADIAT ONCOL
JI Int. J. Radiat. Oncol. Biol. Phys.
PY 2009
VL 75
IS 3
BP S479
EP S479
PG 1
WC Oncology; Radiology, Nuclear Medicine & Medical Imaging
SC Oncology; Radiology, Nuclear Medicine & Medical Imaging
GA 503WW
UT WOS:000270573601527
ER
PT J
AU Hoopes, DJ
Kaziska, D
Weed, D
Smith, BD
Hale, ER
Johnstone, PA
AF Hoopes, D. J.
Kaziska, D.
Weed, D.
Smith, B. D.
Hale, E. R.
Johnstone, P. A.
TI Patient Preferences and Physician Practice Patterns Regarding Breast
Radiotherapy
SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
LA English
DT Meeting Abstract
CT 51st Annual Meeting of the American-Society-for-Radiation-Oncology
CY NOV 01-05, 2009
CL Chicago, IL
SP Amer Soc Radiat Oncol
C1 [Hoopes, D. J.; Hale, E. R.] Wright Patterson Med Ctr, Wright Patterson AFB, OH USA.
[Kaziska, D.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Weed, D.; Johnstone, P. A.] Indiana Univ, Sch Med, Indianapolis, IN USA.
[Smith, B. D.] Wilford Hall USAF Med Ctr, Lackland AFB, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0360-3016
J9 INT J RADIAT ONCOL
JI Int. J. Radiat. Oncol. Biol. Phys.
PY 2009
VL 75
IS 3
BP S78
EP S78
PG 1
WC Oncology; Radiology, Nuclear Medicine & Medical Imaging
SC Oncology; Radiology, Nuclear Medicine & Medical Imaging
GA 503WW
UT WOS:000270573600166
ER
PT S
AU Javorsek, D
Sturrock, P
Buncher, J
Fischbach, E
Gruenwald, T
Hoft, A
Horan, T
Jenkins, J
Kerford, J
Lee, R
Mattes, J
Morris, D
Mudry, R
Newport, J
Petrelli, M
Silver, M
Stewart, C
Terry, B
Willenberg, H
AF Javorsek, D., II
Sturrock, P.
Buncher, J.
Fischbach, E.
Gruenwald, T.
Hoft, A.
Horan, T.
Jenkins, J.
Kerford, J.
Lee, R.
Mattes, J.
Morris, D.
Mudry, R.
Newport, J.
Petrelli, M.
Silver, M.
Stewart, C.
Terry, B.
Willenberg, H.
BE Marshak, ML
TI Investigation of Periodic Nuclear Decay Data with Spectral Analysis
Techniques
SO INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 10th Conference on the Intersections of Particle and Nuclear Physics
CY MAY 26-31, 2009
CL San Diego, CA
SP Brookhaven Natl Lab, European Phys Journal, Fermi Natl Accelerator Lab, Fermi Res Associates, Los Alamos Natl Lab, Natl Sci Fdn, Thomas Jefferson Natl Lab, US DOE, Off Sci, Universities Res Assoc, Univ Minnesota
DE Spectral Analysis; Radioactive Decay
ID HALF-LIFE MEASUREMENTS; SPACED DATA; CONSTANTS; SI-32; TI-44
AB We provide the results from a spectral analysis of nuclear decay experiments displaying unexplained periodic fluctuations. The analyzed data was from Mn-56 decay reported by the Children's Nutrition Research Center in Houston, Si-32 decay reported by an experiment performed at the Brookhaven National Laboratory, and Ra-226 decay reported by an experiment performed at the Physikalisch-Technische-Bundesanstalt in Germany. All three data sets possess the same primary frequency mode consisting of an annual period. Additionally a spectral comparison of the local ambient temperature, atmospheric pressure, relative humidity, Earth-Sun distance, and the plasma speed and latitude of the heliospheric current sheet (HCS) was performed. Following analysis of these six possible causal factors, their reciprocals, and their linear combinations, a possible link between nuclear decay rate fluctuations and the linear combination of the HCS latitude and 1/R motivates searching for a possible mechanism with such properties.
C1 [Javorsek, D., II] 416th Flight Test Squadron,412th Test Wing, Edwards AFB, CA 93524 USA.
[Sturrock, P.] Stanford Univ, Ctr Space Sci Astrophys, Stanford, CA 94305 USA.
[Fischbach, E.; Gruenwald, T.; Hoft, A.; Horan, T.; Jenkins, J.; Kerford, J.; Mattes, J.; Petrelli, M.; Stewart, C.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Hoft, A.; Horan, T.; Jenkins, J.; Kerford, J.; Silver, M.; Stewart, C.] Air Force Resv Off Traning Corps, W Lafayette, IN 47907 USA.
[Lee, R.; Morris, D.; Mudry, R.; Terry, B.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80920 USA.
[Willenberg, H.] Amer Aerospa Adivsors Inc, Rannor, PA 19087 USA.
RP Javorsek, D (reprint author), 416th Flight Test Squadron,412th Test Wing, Edwards AFB, CA 93524 USA.
OI Javorsek, Daniel/0000-0002-0329-4011
FU U.S. Department of Energy [DE-AC02-76ER071428]
FX 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. The work of E.F. was
supported in part by the U.S. Department of Energy under Contract No.
DE-AC02-76ER071428.
NR 27
TC 2
Z9 2
U1 3
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0723-7
J9 AIP CONF PROC
PY 2009
VL 1182
BP 292
EP +
PG 2
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA BQO88
UT WOS:000281460200063
ER
PT B
AU Iyer, N
Brungart, DS
Simpson, BD
AF Iyer, Nandini
Brungart, Douglas S.
Simpson, Brian D.
GP ISCA-INST SPEECH COMMUN ASSOC
TI Perceptual grouping of alternating word pairs: Effect of pitch
difference and presentation rate
SO INTERSPEECH 2009: 10TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH
COMMUNICATION ASSOCIATION 2009, VOLS 1-5
LA English
DT Proceedings Paper
CT 10th INTERSPEECH 2009 Conference
CY SEP 06-10, 2009
CL Brighton, ENGLAND
SP Int Speech Commun Assoc
DE streaming; sound segregation; speech perception
ID COMPLEX-TONE SEQUENCES; AUDITORY PERCEPTION; TEMPORAL ORDER;
SEGREGATION; SPEECH; INTELLIGIBILITY
AB When listeners hear sequences of tones that slowly alternate between a low frequency and a slightly higher frequency, they tend to report hearing a single stream of alternating tones. However, when the alternation rate and/or the frequency difference increases, they often report hearing two distinct streams: a slowly pulsing high and low frequency stream. This experiment used repeating sequences of spondees to investigate whether a similar streaming phenomenon might occur for speech stimuli. The F0 difference between every other word was varied from 0 - 18 semitones. Each word was either 100 or 125 ms in duration. The inter-onset intervals (IOIs) of the individual words were varied from 100 - 300 ms. The spondees were selected in such a way that listeners who perceived a single stream of sequential words would report hearing a different set of spondees than ones who perceived two distinct streams grouped by frequency. As expected, F0 differences was a strong cue for sequential segregation. Moreover, the number of 'two' stream judgments were greater at smaller IOIs, suggesting that factors that influence the obligatory streaming of tonal signals are also important in the segregation of speech signals.
C1 [Iyer, Nandini; Brungart, Douglas S.; Simpson, Brian D.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Iyer, N (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM nandini.iyer@wpafb.af.mil; douglas.brungart@wpafb.af.mil;
brian.simpson@wpafb.af.mil
NR 19
TC 0
Z9 0
U1 0
U2 0
PU ISCA-INST SPEECH COMMUNICATION ASSOC
PI BAIXAS
PA C/O EMMANUELLE FOXONET, 4 RUE DES FAUVETTES, LIEU DIT LOUS TOURILS,
BAIXAS, F-66390, FRANCE
BN 978-1-61567-692-7
PY 2009
BP 384
EP 387
PG 4
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BOJ53
UT WOS:000276842800094
ER
PT B
AU Patel, HJ
Crouch, JW
Kim, YC
Kim, TC
AF Patel, Hiren J.
Crouch, James W.
Kim, Yong C.
Kim, Tony C.
GP IEEE
TI CREATING A UNIQUE DIGITAL FINGERPRINT USING EXISTING COMBINATIONAL LOGIC
SO ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS
1-5
LA English
DT Proceedings Paper
CT IEEE International Symposium on Circuits and Systems (ISCAS 2009)
CY MAY 24-27, 2009
CL Taipei, TAIWAN
SP IEEE
AB Creating digital circuits of ever decreasing size leads to certain imperfections that cannot be avoided. Although these imperfections are not significant enough to hinder the digital circuit operation, they are random and can be exploited to create a unique digital fingerprint which can be used as a chip identity. Unique digital fingerprints can be created on any number of circuits and in our research we created 60 digital fingerprints, all of which were uniquely identifiable. The digital fingerprint is a function of the amount of combinational logic that forms the circuit and can be applied to any sufficiently large combinational circuit. In this research, we have used a combinational multiplier and we show how a longer combinational path leads to a larger number of captured glitches. In addition, we show the effects of temperature changes on the digital fingerprint.
C1 [Patel, Hiren J.; Crouch, James W.; Kim, Yong C.] USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Kim, Tony C.] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Patel, HJ (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM hpatel@afit.edu; james.crouch.5@us.af.mil; ykim@afit.edu;
tony.kim@wpatb.af.mil
NR 7
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3827-3
PY 2009
BP 2693
EP +
DI 10.1109/ISCAS.2009.5118357
PG 2
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BNZ33
UT WOS:000275929801360
ER
PT B
AU Schmitt, DT
Kurkowski, SH
Mendenhall, MJ
AF Schmitt, Daniel T.
Kurkowski, Stuart H.
Mendenhall, Michael J.
BE Zeng, D
Khan, L
Zhou, L
Day, MY
Yang, C
Thuraisingham, B
TI Automated Casing Event Detection in Persistent Video Surveillance
SO ISI: 2009 IEEE INTERNATIONAL CONFERENCE ON INTELLIGENCE AND SECURITY
INFORMATICS
LA English
DT Proceedings Paper
CT IEEE International Conference on Intelligence and Security Informatics
CY JUN 08-11, 2009
CL Univ Texas, Dallas, Richardson, TX
SP Univ Arizona
HO Univ Texas, Dallas
AB An increase volume of surveillance video is being collected, by various organizations, which has led to a need for automated video systems in order to reduce reviewing time. Using persistent video gathered from an aircraft overhead, as is done with unmanned aerial systems in Iraq and Afghanistan, we get a birds-eye view of vehicular activity. From these activities we can use a model to detect suspicious surveillance activity (casing). This paper builds a model to detect casing events and tests it using Global Positioning System (GPS) tracks generated from vehicles driving in an urban area to show the effectiveness of the model. The results show that several vehicles can be monitored at once in real-time. Additionally, the model detects when vehicles are casing buildings and which buildings they are targeting.
C1 [Schmitt, Daniel T.; Kurkowski, Stuart H.; Mendenhall, Michael J.] USAF, Grad Sch Engn & Management, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Schmitt, DT (reprint author), USAF, Grad Sch Engn & Management, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM daniel.schmitt@afit.edu; stuart.kurkowski@afit.edu;
michael.mendenhall@afit.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4172-3
PY 2009
BP 143
EP 148
DI 10.1109/ISI.2009.5137286
PG 6
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BLM60
UT WOS:000270541900025
ER
PT B
AU Schmitt, DT
Kurkowski, SH
Mendenhall, MJ
AF Schmitt, Daniel T.
Kurkowski, Stuart H.
Mendenhall, Michael J.
BE Zeng, D
Khan, L
Zhou, L
Day, MY
Yang, C
Thuraisingham, B
TI Building Social Networks in Persistent Video Surveillance
SO ISI: 2009 IEEE INTERNATIONAL CONFERENCE ON INTELLIGENCE AND SECURITY
INFORMATICS
LA English
DT Proceedings Paper
CT IEEE International Conference on Intelligence and Security Informatics
CY JUN 08-11, 2009
CL Univ Texas, Dallas, Richardson, TX
SP Univ Arizona
HO Univ Texas, Dallas
AB Social networks are a beneficial analysis tool in counterterrorism and counterinsurgent activities. The difficulty lies in the amount of time and resources it takes to construct a social network. By exploiting existing 24-hour overhead persistent video, we can build a social network from vehicle to vehicle and vehicle to building interactions. This paper demonstrates building a social network from vehicle tracks based on their interactions in an urban environment From this social network we can see relationships among actors and their locations of interest This information provides additional intelligence about terrorist activities to exploit them.
C1 [Schmitt, Daniel T.; Kurkowski, Stuart H.; Mendenhall, Michael J.] USAF, Grad Sch Engn & Management, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Schmitt, DT (reprint author), USAF, Grad Sch Engn & Management, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM daniel.schmitt@afit.edu; stuart.kurkowski@afit.edu;
michael.mendenhall@afit.edu
NR 4
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4172-3
PY 2009
BP 217
EP 219
DI 10.1109/ISI.2009.5137307
PG 3
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BLM60
UT WOS:000270541900046
ER
PT J
AU Sabelkin, V
Mall, S
AF Sabelkin, V.
Mall, S.
TI Combined Adhesion and Friction Effects on Cylinder-on-Flat
Elastic-Plastic Microcontact
SO JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Adhesion; cylinder-on-flat microcontact; elastic-plastic deformation;
friction; stress-strain state
ID RIGID PLANE; CONTACT; PARTICLES; STICKING; SPHERES
AB Considerable research efforts have been expended in the studies of various types of microcontact devices. One such case is the microelectromechanical switches (MEMS) involving metal-to-metal microcontacts. These microcontacts involve many geometries including cylinder-on-flat interfaces. Further, these microcontacts operate under the combined effects of adhesion and friction and also under the cyclic loading condition, so the understanding of microcontact stress state as well as the induced adhesion force during a load cycle is needed. This study investigates the microcontact interaction between deformable smooth cylindrical segment and deformable smooth flat surface with and without adhesion force and also with and without friction using a finite element methodology. Surface integration method based on the Lennard-Jones potential is used to compute the adhesion force, which involves traction-repulsion interactions outside the contact area of contacting bodies. Effects of several parameters (power exponents of pressure function, energy of adhesion, equilibrium separation distance, contact profile adjustment, and separation distance between interacting bodies) on the adhesion force are analyzed. Influence of adhesion force on the contact area and the stress state of contacting bodies during loading and unloading along with friction effects are investigated. The adhesion force in cylinder-on-flat microcontact decreases with increasing external applied force and with the elastic-plastic material behavior. Contact areas during increasing and decreasing portions of an applied load cycle are not equal at a given load level. Contact area changes non-linearly even when the applied external force varies linearly. Contact area increases in the presence of adhesion force and with the elastic-plastic material behavior. However, the adhesion force decreases while the contact area increases between elastic-plastic bodies in comparison to those between elastic bodies. The maximum stress state is neither at the contact surface nor at the instant of maximum applied external force. The stress state changes considerably in the presence of friction, but contact area does not. (C) Koninklijke Brill NV, Leiden, 2009
C1 [Mall, S.] USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT,ENY, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT,ENY, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
FU U.S. Air Force
FX The support of this study from the U.S. Air Force is appreciated.
NR 30
TC 3
Z9 3
U1 0
U2 5
PU BRILL ACADEMIC PUBLISHERS
PI LEIDEN
PA PLANTIJNSTRAAT 2, P O BOX 9000, 2300 PA LEIDEN, NETHERLANDS
SN 0169-4243
J9 J ADHES SCI TECHNOL
JI J. Adhes. Sci. Technol.
PY 2009
VL 23
IS 6
BP 851
EP 879
DI 10.1163/156856109X411229
PG 29
WC Engineering, Chemical; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA 435PZ
UT WOS:000265357100006
ER
PT J
AU Maji, A
Mahnke, S
Murphey, TW
AF Maji, Arup
Mahnke, Stephen
Murphey, Thomas W.
TI Actuation of Neutrally Stable Composite Tape-Springs with Shape Memory
Alloy
SO JOURNAL OF ADVANCED MATERIALS
LA English
DT Article
AB An experimental investigation has been performed to study the use of neutrally stable carbon fiber composite tape-springs as a deployable structure. The tape springs fabricated exhibited the characteristic of neutral stability(1) (can maintain equilibrium in intermediate positions in between the stowed and deployed configuration). Neutral stability eliminates the need for an external mechanism to hold the tape-spring in place and allows actuation of the structure with minimal forces and minimal stored energy. Nickel-titanium shape memory alloy wires were attached to the tape-spring and heated to provide the deployment force.
The paper will present the design, analysis, fabrication and actuation of composite tape-springs suitable for use in deployable space structures starting with an existing theoretical framework for bistable behavior(1). The experimental program described, covering design, fabrication and actuation enables an evaluation of the discrepancies between theory and experimental observations.
C1 [Maji, Arup] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
[Murphey, Thomas W.] USAF, Res Lab, Space Vehicles Directorate, Albuquerque, NM USA.
RP Maji, A (reprint author), Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
EM amaji@unm.edu
NR 17
TC 0
Z9 0
U1 0
U2 1
PU SAMPE PUBLISHERS
PI COVINA
PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 USA
SN 1070-9789
J9 J ADV MATER-COVINA
JI J. Adv. Mater.
PD JAN
PY 2009
VL 41
IS 1
BP 18
EP 33
PG 16
WC Materials Science, Multidisciplinary
SC Materials Science
GA 575TU
UT WOS:000276092400003
ER
PT J
AU Stepaniak, MJ
de Haag, MU
van Graas, F
AF Stepaniak, Michael J.
de Haag, Maarten Uijt
van Graas, Frank
TI Field Programmable Gate Array-Based Attitude Stabilization
SO JOURNAL OF AEROSPACE COMPUTING INFORMATION AND COMMUNICATION
LA English
DT Article
AB A system for determining vehicle attitude using a field programmable gate array and low-cost gyroscopes is presented. The method is intended to support the stabilization of a short duration, unmanned aerial vehicle. Using a microelectromechanical system inertial sensor for the calibration and serial interface, the algorithm sidesteps concerns related to electromagnetic interference and the impact of embedded, proprietary filters. An Allan variance analysis is used to characterize the sensor errors and predict system performance. A floating point representation using a direction cosine matrix is hosted on the field programmable gate array alongside the platform stabilization feedback loops. Although prone to drifting without additional aiding, the derived attitude has been demonstrated to be effective in stabilizing a remotely piloted quadrotor.
C1 [Stepaniak, Michael J.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[de Haag, Maarten Uijt; van Graas, Frank] Ohio Univ, Avion Engn Ctr, Stocker Ctr 321B, Athens, OH 45701 USA.
RP Stepaniak, MJ (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Michael.Stepaniak@afit.edu
NR 16
TC 0
Z9 1
U1 0
U2 2
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 AEROS COMP INF COM
JI J. Aerosp. Comput. Inf. Commun.
PY 2009
VL 6
IS 7
BP 451
EP 463
DI 10.2514/1.39707
PG 13
WC Engineering, Aerospace
SC Engineering
GA 510GH
UT WOS:000271075600002
ER
PT J
AU Fiorino, ST
Bartell, RJ
Krizo, MJ
Perram, GP
Fedyk, DJ
Moore, KP
Harris, TR
Cusumano, SJ
AF Fiorino, Steven T.
Bartell, Richard J.
Krizo, Matthew J.
Perram, Glen P.
Fedyk, Daniel J.
Moore, Kenneth P.
Harris, Thomas R.
Cusumano, Salvatore J.
TI Worldwide Mission Planning Tool for Tactical Laser Systems
SO JOURNAL OF AEROSPACE COMPUTING INFORMATION AND COMMUNICATION
LA English
DT Article
ID AEROSOLS
AB The directed energy modeling and simulation community can make important direct contributions to the joint warfighting community by providing the capability to estimate expected performance of high energy laser systems on a worldwide basis over both land and ocean regions accounting for variability in system performance arising from spatial, spectral and temporal variations in operating conditions. Key recently introduced features of the Air Force Institute of Technology Center for Directed Energy's high energy laser end-to-end operational simulation parametric one-on-one engagement level model allow it to meet modeling and simulation needs and function as a near term mission planning tool. These features include the capability to derive vertical profiles of atmospheric effects based probabilistic climatology, historical weather reanalysis grids, or real-time forecast models available on-line. Each atmospheric gas or particulate is evaluated based on its wavelength-dependent forward and off-axis scattering characteristics and absorption effects on electromagnetic energy delivered at any wavelength from 0.4 mu m to 8.6 m. High energy laser end-to-end operational simulation can produce profiles, including correlated optical turbulence profiles in percentile format, from probabilistic climatology for over 400 land sites worldwide for all times of day and for a 1 degrees x 1 degrees grid over all ocean locations. In addition, probability of cloud free line of sight for hundreds of land sites worldwide is available in the model. Target surface orientation is defined in three-dimensional space, supporting accurate assessment of the effectiveness of a particular engagement geometry. Effects of thin layers of fog, several types of rain and several types of water droplet and ice clouds can also be considered. In the current study, performance predictions at several wavelengths for a number of geographically diverse land and sea locations are made using numerical weather reanalysis data and are compared with results derived from probabilistic climatology. Use of web-based numerical weather data constitutes a step toward the development of a true directed energy mission planning tool. Complex interactions between the effects of meteorological parameters as a function of location, specific time of day, and season on predicted laser system performance have been demonstrated. Use of gridded numerical weather reanalysis data reveals operationally relevant changes in predicted system performance over fairly localized areas, indicating that in many cases conditions exist which might be exploited for operational advantage in employment of directed energy weapons if correctly forecasted and analyzed.
C1 [Fiorino, Steven T.; Perram, Glen P.; Fedyk, Daniel J.; Moore, Kenneth P.; Harris, Thomas R.] USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
[Bartell, Richard J.; Krizo, Matthew J.; Cusumano, Salvatore J.] USAF, Inst Technol, Ctr Directed Energy, Wright Patterson AFB, OH 45433 USA.
RP Fiorino, ST (reprint author), USAF, Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
OI Perram, Glen/0000-0002-4417-3929
NR 21
TC 3
Z9 3
U1 0
U2 7
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 1940-3151
J9 J AEROSP COMPUT IN C
JI J. Aerosp. Comput. Inf. Commun.
PY 2009
VL 6
IS 8
BP 491
EP 505
DI 10.2514/1.35778
PG 15
WC Engineering, Aerospace
SC Engineering
GA 510GJ
UT WOS:000271075800002
ER
PT J
AU Weeks, TM
AF Weeks, Thomas M.
TI JA 2009 Recognition and Appreciation
SO JOURNAL OF AIRCRAFT
LA English
DT Editorial Material
RP Weeks, TM (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JAN-FEB
PY 2009
VL 46
IS 1
BP 1
EP 4
DI 10.2514/1.41636
PG 4
WC Engineering, Aerospace
SC Engineering
GA 406PT
UT WOS:000263308100001
ER
PT J
AU Gamble, BJ
Reeder, MF
AF Gamble, Brian J.
Reeder, Mark F.
TI Experimental Analysis of Propeller-Wing Interactions for a Micro Air
Vehicle
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA 36th Fluid Dynamics Conference
CY JUN 05-08, 2006
CL San Francisco, CA
SP Amer Inst Aeronaut & Astronaut
ID AERODYNAMIC INTERACTION; INTEGRATION
AB An experimental investigation into the effects of the propeller slipstream on a small, flexible-wing air vehicle with a 2-4 in. wingspan was conducted at typical flight speeds, resulting in Reynolds numbers based on a mean aerodynamic chord of about 1 x 10(5). A static test bench was used to characterize the forces and moments acting on the motor and, separately, on the airframe. The motor and propeller, of diameter D, were mounted on a torque cell that was itself affixed to an air-bearing table configured to measure thrust. A model of the fuselage, capable of wing location adjustment, was affixed to a 6-degree-of-freedom balance. The resulting set of decoupled force and moment data was collected for axial wing placements ranging from 0.17 to 0.73 D and also for varied vertical wing placements. The results suggest that between 12 and 18% of propeller thrust translates into airframe drag, with the largest percentage occurring for the wiag placement closest to the propeller (0.17 D). The measured reaction torque was found to be as high as 45% of the motor torque, and its dependence on wing placement was measured. Wind-tunnel data, collected using a six-component balance and a triaxial hot-wire anemometer mounted on a traversing system, yielded all three components (of velocity naps for propeller-off and propeller-on conditions at typical operating airspeeds. The secondary flows generated by the propeller, propeller-wing interaction, and wing-tip vortices were captured and analyzed.
C1 [Gamble, Brian J.; Reeder, Mark F.] USAF, AF Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 18
TC 6
Z9 6
U1 0
U2 5
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JAN-FEB
PY 2009
VL 46
IS 1
BP 65
EP 73
DI 10.2514/1.34520
PG 9
WC Engineering, Aerospace
SC Engineering
GA 406PT
UT WOS:000263308100007
ER
PT J
AU Nelson, D
AF Nelson, D.
TI Numerical Optimization of Airfoils in Low Reynolds Number Flows
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID AERODYNAMIC SHAPE OPTIMIZATION
C1 [Nelson, D.] Los Angeles Air Force Base, El Segundo, CA 90245 USA.
RP Nelson, D (reprint author), USAF, 501 Esplanade 304, Redondo Beach, CA 90277 USA.
EM daniel.nelson@losangeles.af.mil
NR 9
TC 1
Z9 1
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JAN-FEB
PY 2009
VL 46
IS 1
BP 331
EP 337
DI 10.2514/1.36859
PG 7
WC Engineering, Aerospace
SC Engineering
GA 406PT
UT WOS:000263308100036
ER
PT J
AU Yang, B
Rethinam, RM
Mall, S
AF Yang, B.
Rethinam, R. M.
Mall, S.
TI Modeling and Analysis of Cylindrical Nanoindentation of Graphite
SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
LA English
DT Article
DE bending; boundary-elements methods; elasticity; graphite; Green's
function methods; indentation; multilayers; nanostructured materials;
van der Waals forces
ID GREENS-FUNCTION; GRAPHENE; CARBON; FILMS
AB Graphite at the nanoscale is modeled as a material system consisting of a stack of parallel plates buffered by an elastic material. While the plates represent individual graphene sheets, the buffer material models the Van der Waals interaction between the graphene sheets. As such, the loading on graphite at the nanoscale is characterized by the membrane force, the bending moment, and the shear force in the graphene sheets. Cylindrical nanoindentation of graphite is analyzed by applying a special boundary element method that employs Green's function for multilayers with platelike interfaces. Because Green's function satisfies the traction-free surface, the interfacial displacement continuity and the interfacial traction discontinuity conditions, only the indentation surface area where the boundary condition is altered, are numerically discretized. Numerical results of cylindrical nanoindentation are presented. It is shown that the bending moment and the shear force in the graphene sheets are concentrated around the edge of contact, consistent with the singularities existing in the second and the third derivatives of the surface displacement in the reduced case of a semi-infinite homogeneous solid under cylindrical contact. Kinks of single, double, and triple joints are related to the bending moment, the shear force, and the concentrated force, respectively.
C1 [Yang, B.; Rethinam, R. M.] Florida Inst Technol, Dept Mech & Aerosp Engn, Melbourne, FL 32901 USA.
[Mall, S.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Yang, B (reprint author), Florida Inst Technol, Dept Mech & Aerosp Engn, Melbourne, FL 32901 USA.
RI Yang, Bo/A-5716-2010
NR 21
TC 4
Z9 4
U1 0
U2 12
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0021-8936
J9 J APPL MECH-T ASME
JI J. Appl. Mech.-Trans. ASME
PD JAN
PY 2009
VL 76
IS 1
DI 10.1115/1.2999412
PG 7
WC Mechanics
SC Mechanics
GA 372GK
UT WOS:000260889900010
ER
PT J
AU Ong, BA
Forester, J
Fallot, A
AF Ong, Bruce A.
Forester, Joseph
Fallot, Andre
TI Does Influenza Vaccination Improve Pediatric Asthma Outcomes?
SO JOURNAL OF ASTHMA
LA English
DT Article
DE asthma; influenza; pediatrics; immunizations; military
ID EXACERBATIONS; CHILDREN
AB Objective. Controversy exists regarding the effectiveness of influenza vaccination in preventing influenza-related asthma exacerbations in the pediatric population. While yearly influenza immunization is widely recommended for children with asthma, there is currently little evidence to support this practice. Several studies have demonstrated no measurable benefit in asthma outcomes. This study sought to determine whether influenza vaccination status is associated with indicators of asthma morbidity within the military pediatric population. Methods. A survey was conducted of patients 3 to 18 years of age with a diagnosis of asthma enrolled in the pediatric clinics of Brooke Army Medical Center, Fort Sam Houston, Texas, and Wilford Hall Medical Center, Lackland Air Force Base, Texas. Management practices and outcomes for 80 children were evaluated. Data were analyzed using the statistical package SPSS version 12 (SPSS Inc., Chicago). Univariate analyses were performed to identify associations between influenza vaccination, selected demographic variables and asthma exacerbation defined by oral steroid prescription, hospital visits, and unscheduled clinic or emergency department visits for asthma symptoms. Logistic regression analyses were conducted to detect possible confounding variables. Results. In the univariate analyses, current influenza vaccination status was associated with a significant reduction of oral steroid use in the 12 months before the survey. This relationship was appreciated to a lesser extent with emergency department or unscheduled clinic visits in the last 12 months. No significant differences were found regarding the distribution of influenza vaccination status across selected demographic variables. In the multivariate analyses, current influenza vaccination status was independently associated with significantly decreased odds of using oral steroids in the previous 12 months. There was no evidence of confounding or effect modification. Conclusions. This study suggests influenza vaccination is associated with fewer asthma exacerbations. After controlling for several potential confounding variables, administration of influenza vaccine was associated with a protective effect against indicators of asthma exacerbations. Our results indicate that children with asthma in the military beneficiary population may benefit from annual influenza vaccination.
C1 [Ong, Bruce A.] Hunter Army Airfield, Dept Aviat Med, Savannah, GA 31419 USA.
[Forester, Joseph] USAF Acad, Dept Pediat, Usafa, CO USA.
[Fallot, Andre] Madigan Army Med Ctr, Dept Pediat, Tacoma, WA 98431 USA.
RP Ong, BA (reprint author), Hunter Army Airfield, Dept Aviat Med, Bldg 1257,N Lightning Rd, Savannah, GA 31419 USA.
EM bruce.ong@us.army.mil
NR 12
TC 16
Z9 17
U1 0
U2 2
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0277-0903
J9 J ASTHMA
JI J. Asthma
PY 2009
VL 46
IS 5
BP 477
EP 480
AR PII 912534341
DI 10.1080/02770900902795538
PG 4
WC Allergy; Respiratory System
SC Allergy; Respiratory System
GA 460NV
UT WOS:000267195300009
PM 19544168
ER
PT J
AU Thompson, RA
Wehling, MF
Evers, JH
Dixon, WE
AF Thompson, R. A.
Wehling, M. F.
Evers, J. H.
Dixon, W. E.
TI Body rate decoupling using haltere mid-stroke measurements for inertial
flight stabilization in Diptera
SO JOURNAL OF COMPARATIVE PHYSIOLOGY A-NEUROETHOLOGY SENSORY NEURAL AND
BEHAVIORAL PHYSIOLOGY
LA English
DT Article
DE Diptera; Haltere; Flight stability; Strain rate; Campaniform sensilla
ID BLOWFLY CALLIPHORA-VICINA; CAMPANIFORM SENSILLA;
DROSOPHILA-MELANOGASTER; HEAD MOVEMENTS; MOTOR-NEURON; FLIES;
KINEMATICS; EQUILIBRIUM; DYNAMICS; REFLEXES
AB Halteres, the modified rear wings of Diptera, have long been recognized as sensory organs necessary for basic flight stability. These organs, which act as vibrating structure gyroscopes, are known to sense strains proportional to Coriolis accelerations. While compensatory responses have been demonstrated that indicate the ability of insects to distinguish all components of the body rate vector, the specific mechanism by which the halteres are able to decouple the body rates has not been clearly understood. The research documented in this report describes a potential mechanism, using averaged strain and strain rate at the center of the haltere stroke, to decouple the inertial rate components. Through dynamic simulation of a nonlinear model of the haltere 3-dimensional trajectory, this straightforward method was demonstrated to provide an accurate means of generating signals that are proportional to three orthogonal body rate components. Errors associated with residual nonlinearity and rate-coupling were quantified for a bilaterally reconstructed body rate vector over a full range of pitch and yaw rates and two roll rate conditions. Models that are compatible with insect physiology are proposed for performing necessary signal averaging and bilateral processing.
C1 [Thompson, R. A.; Wehling, M. F.; Evers, J. H.] USAF, Res Lab, AFRL RWGI, Eglin AFB, FL USA.
[Dixon, W. E.] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL USA.
RP Thompson, RA (reprint author), USAF, Res Lab, AFRL RWGI, Eglin AFB, FL USA.
EM thompsra@ufl.edu
RI Dixon, Warren/F-5238-2015
OI Dixon, Warren/0000-0002-5091-181X
FU US Air Force Research Laboratory
FX The authors would like to thank the US Air Force Research Laboratory for
funding this investigation into bio-mimetic methods of inertial
measurement.
NR 24
TC 8
Z9 8
U1 1
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0340-7594
J9 J COMP PHYSIOL A
JI J. Comp. Physiol. A -Neuroethol. Sens. Neural Behav. Physiol.
PD JAN
PY 2009
VL 195
IS 1
BP 99
EP 112
DI 10.1007/s00359-008-0388-1
PG 14
WC Behavioral Sciences; Neurosciences; Physiology; Zoology
SC Behavioral Sciences; Neurosciences & Neurology; Physiology; Zoology
GA 396FN
UT WOS:000262577700009
PM 19011872
ER
PT J
AU Faulkner, JA
Ferguson, EE
AF Faulkner, Jeffrey A.
Ferguson, Earl E.
TI Innovations in Military Handling of Facial Trauma
SO JOURNAL OF CRANIOFACIAL SURGERY
LA English
DT Article
DE Craniofacial trauma; combat trauma; Iraq; maxillofacial trauma; war
surgery
ID COMPUTED-TOMOGRAPHY; FRACTURES
AB As the military medical treatment facilities of Operation Iraqi Freedom have transitioned from make-shift tent facilities to more formal fixed facilities, the capability to deliver more complex care has markedly improved. Using case presentations, the authors illustrate the integration of advances in surgical technology in managing complex and devastating craniofacial trauma at the 332nd Air Force Theater Hospital in Balad Iraq during Operation Iraqi Freedom 2006.
C1 [Faulkner, Jeffrey A.] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
[Ferguson, Earl E.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
RP Faulkner, JA (reprint author), Brooke Army Med Ctr, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM Jeffrey.faulkner@amedd.army.mil
NR 7
TC 2
Z9 2
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1049-2275
J9 J CRANIOFAC SURG
JI J. Craniofac. Surg.
PD JAN
PY 2009
VL 20
IS 1
BP 62
EP 67
DI 10.1097/SCS.0b013e3181945a7a
PG 6
WC Surgery
SC Surgery
GA 399ZS
UT WOS:000262838400017
PM 19164991
ER
PT J
AU Dalton, S
LeBoit, P
Bastian, B
Kolaitis, N
Charzan, S
Werling, R
AF Dalton, S.
LeBoit, P.
Bastian, B.
Kolaitis, N.
Charzan, S.
Werling, R.
TI USE OF FLUORESCENCE IN-SITU HYBRIDIZATION (FISH) AS A MEANS TO
DISTINGUISH INTRANODAL NEVUS FROM MELANOMA METASTATIC TO LYMPH NODES
SO JOURNAL OF CUTANEOUS PATHOLOGY
LA English
DT Meeting Abstract
C1 [Dalton, S.] Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
[LeBoit, P.; Bastian, B.; Kolaitis, N.; Charzan, S.; Werling, R.] UCSF Med Ctr, San Francisco, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0303-6987
J9 J CUTAN PATHOL
JI J. Cutan. Pathol.
PD JAN
PY 2009
VL 36
IS 1
BP 107
EP 108
PG 2
WC Dermatology; Pathology
SC Dermatology; Pathology
GA 389XT
UT WOS:000262129600034
ER
PT J
AU Papavero, V
Fanburg-Smith, J
Hallman, J
AF Papavero, V.
Fanburg-Smith, J.
Hallman, J.
TI DESMOPLASTIC MELANOMA: A CLINICOPATHOLOGIC REVIEW AND SUBCLASSIFICATION
OF 90 CASES
SO JOURNAL OF CUTANEOUS PATHOLOGY
LA English
DT Meeting Abstract
C1 [Papavero, V.] Univ Texas SW, Dallas, TX USA.
[Fanburg-Smith, J.; Hallman, J.] USAF, Inst Pathol, Washington, DC 20330 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0303-6987
J9 J CUTAN PATHOL
JI J. Cutan. Pathol.
PD JAN
PY 2009
VL 36
IS 1
BP 160
EP 160
PG 1
WC Dermatology; Pathology
SC Dermatology; Pathology
GA 389XT
UT WOS:000262129600249
ER
PT J
AU Moore, EA
Yeo, YK
Ryu, MY
Hengehold, RL
AF Moore, E. A.
Yeo, Y. K.
Ryu, Mee-Yi
Hengehold, R. L.
TI Nearly Perfect Electrical Activation Efficiencies from Silicon-Implanted
Al (x) Ga1-x N with High Aluminum Mole Fraction
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article; Proceedings Paper
CT Symposium on Phase Stability, Phase Transformation and Reactive Phase
Formation in Electronic Materials VII held at the 2008 TMS Annual
Meeting
CY MAR 09-13, 2008
CL New Orleans, LA
SP Minerals, Met & Mat Soc
DE AlGaN; Hall-effect measurement; implantation; electrical activation;
mobility
ID OHMIC CONTACTS; SI; GAN; TEMPERATURE; ALXGA1-XN; ALGAN; DEPENDENCE;
DISORDER; HEMTS
AB Electrical activation studies of Al (x) Ga1-x N (x = 0.45 and 0.51) implanted with Si for n-type conductivity have been made as a function of ion dose and anneal temperature. Silicon ions were implanted at 200 keV with doses ranging from 1 x 10(14) cm(-2) to 1 x 10(15) cm(-2) at room temperature. The samples were subsequently annealed from 1150A degrees C to 1350A degrees C for 20 min in a nitrogen environment. Nearly 100% electrical activation efficiency was successfully obtained for the Si-implanted Al0.45Ga0.55N samples after annealing at 1350A degrees C for doses of 1 x 10(14) cm(-2) and 5 x 10(14) cm(-2) and at 1200A degrees C for a dose of 1 x 10(15) cm(-2), and for the Al0.51Ga0.49N implanted with silicon doses of 1 x 10(14) cm(-2) and 5 x 10(14) cm(-2) after annealing at 1300A degrees C. The highest room-temperature mobility obtained was 61 cm(2)/V s and 55 cm(2)/V s for the low-dose implanted Al0.45Ga0.55N and Al0.51Ga0.49N, respectively, after annealing at 1350A degrees C for 20 min. These results show unprecedented activation efficiencies for Al (x) Ga1-x N with high Al mole fractions and provide suitable annealing conditions for Al (x) Ga1-x N-based device applications.
C1 [Moore, E. A.; Yeo, Y. K.; Hengehold, R. L.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Ryu, Mee-Yi] Kangwon Natl Univ, Dept Phys, Chunchon 200701, South Korea.
RP Moore, EA (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM myryu@kangwon.ac.kr
NR 24
TC 2
Z9 2
U1 2
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD JAN
PY 2009
VL 38
IS 1
BP 153
EP 158
DI 10.1007/s11664-008-0553-x
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 385CF
UT WOS:000261789900020
ER
PT J
AU Dagrosa, RL
Martin, JF
Bebarta, VS
AF Dagrosa, Richard L.
Martin, James F.
Bebarta, Vikhyat S.
TI TENSION HYDROTHORAX
SO JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
C1 [Dagrosa, Richard L.] San Antonio Uniformed Serv Hlth Educ Consortium, Dept Emergency Med, San Antonio, TX USA.
[Bebarta, Vikhyat S.] Wilford Hall USAF Med Ctr, Dept Emergency Med, San Antonio, TX USA.
[Bebarta, Vikhyat S.] Cent Texas Poison Ctr, Temple, TX USA.
RP Bebarta, VS (reprint author), 25218 Battle Lake, San Antonio, TX 78258 USA.
NR 4
TC 2
Z9 2
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
J9 J EMERG MED
JI J. Emerg. Med.
PD JAN
PY 2009
VL 36
IS 1
BP 78
EP 79
DI 10.1016/j.jemermed.2007.06.015
PG 2
WC Emergency Medicine
SC Emergency Medicine
GA 401WA
UT WOS:000262972000019
PM 17961963
ER
PT J
AU Hartley, CS
Spowart, JE
AF Hartley, Craig S.
Spowart, Jonathan E.
TI Measures of Bulk and Grain Strain in Deformation Processes
SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
DE deformation; grain boundaries; grain growth; internal stresses; rolling;
sheet metal processing; steel
ID ANISOTROPY
AB This study illustrates a method of measuring internal total strain based on the observation that networks of internal boundaries within a polycrystalline material deform locally in a manner congruent with the local metal flow. Appropriate measurements of the development of the spatial anisotropy of such networks with increasing deformation provide a basis for defining several measures of the local total strain. These quantities, called "grain strains" when the boundaries observed are grain boundaries, can serve as an experimental measure of the internal total strain at various locations in a specimen for comparison with computations based on finite element models using various constitutive relations or phase field simulations of grain growth or deformation. Experimental measurements of grain strains at the center of a ferritic steel sheet rolled in nominally 10% increments to 50% total reduction in thickness illustrate the method and correlate well with corresponding strains based on measures of the change in thickness of the sheet and the assumption of plane strain.
C1 [Hartley, Craig S.] El Arroyo Enterprises, Sedona, AZ 86336 USA.
[Spowart, Jonathan E.] USAF, Mat Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hartley, CS (reprint author), El Arroyo Enterprises, 231 Arroyo Sienna Dr, Sedona, AZ 86336 USA.
NR 16
TC 0
Z9 0
U1 0
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0094-4289
J9 J ENG MATER-T ASME
JI J. Eng. Mater. Technol.-Trans. ASME
PD JAN
PY 2009
VL 131
IS 1
AR 011006
DI 10.1115/1.3026548
PG 8
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 388GM
UT WOS:000262008300007
ER
PT J
AU Vandewalle, KS
AF Vandewalle, Kraig S.
TI TEMPERATURE CHANGES IN SILORANE-, ORMOCER-, AND DIMETHACRYLATE-BASED
COMPOSITES AND PULP CHAMBER ROOF DURING LIGHT-CURING
SO JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY
LA English
DT Editorial Material
RP Vandewalle, KS (reprint author), Gen Dent Residency,1615 Truemper St, Lackland AFB, TX 78236 USA.
NR 4
TC 0
Z9 0
U1 1
U2 1
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1496-4155
J9 J ESTHET RESTOR DENT
JI J. Esthet. Restor. Dent.
PY 2009
VL 21
IS 2
BP 132
EP 132
DI 10.1111/j.1708-8240.2009.00245.x
PG 1
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 431BJ
UT WOS:000265036000013
PM 19368604
ER
PT J
AU Roberts, HW
Berzins, DW
Charlton, DG
AF Roberts, Howard W.
Berzins, David W.
Charlton, David G.
TI Hardness of Three Resin-Modified Glass-Ionomer Restorative Materials as
a Function of Depth and Time
SO JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY
LA English
DT Article
ID CURING DEPTH; COMPOSITE; CEMENTS; CURE; CHEMISTRY; STRENGTH; HYBRID
AB Statement of the Problem:
The polymerization of bulk-placed resin-modified glass-ionomer (RMGI) restoratives is compromised when penetration of the curing light is limited because of the materials' thickness. It is unknown if additional post light-curing resin polymerization and/or glass-ionomer setting occurs over time to ensure adequate polymerization.
Purpose:
The primary objective was to evaluate the depth of cure of various thicknesses of RMGI restorative products over 1 year using Knoop hardness (KH) testing.
Materials and Methods:
The materials were placed in Delrin molds having an internal diameter of 5.0 mm and heights of 2, 3, 4, and 5 mm and were photopolymerized with a halogen light-curing unit. Five specimens of each depth were prepared for each time period evaluated. Specimens were stored in darkness at 37 +/- 2 degrees C and 98 +/- 2% humidity until being tested at 24 hours, 1 week, and 1, 3, 6, 9, and 12 months after fabrication. Mean KH values were calculated for the bottom and top surfaces of each thickness group and used to determine bottom/top hardness ratios. Data were compared using two-way analysis of variance (factors of time, thickness) at a 0.05 significance level with Scheffe's post hoc analysis, where required.
Results:
The materials had relatively stable top surface KH, which permitted valid assessment of changes in bottom surface KH over time. The bottom surface KH of some RMGIs changed significantly over time (p < 0.001), but degrees of change were material dependent. Certain RMGIs demonstrated a potential for statistically significant post light-activation hardening; however, that too was material dependent. As compared with top surface KH, deeper layers of the thicker RMGI specimens consistently failed to achieve an adequate degree of polymerization.
Conclusion:
Although certain RMGI materials demonstrate a potential for post light-activation chemically initiated resin polymerization and/or polyalkenoate acid/base reaction, these reactions may not be sufficient to ensure that the material is adequately polymerized for long-term success. This is particularly true when RMGI materials are placed in thicker layers where curing light penetration may be compromised.
CLINICAL SIGNIFICANCE
RMGI materials should not be placed in bulk but photopolymerized in layers to ensure adequate light activation. The results of this study suggest that Photac-Fil Quick be placed in layers no thicker than 2 mm while Fuji II LC and Vitremer may be placed in layers up to 3 mm in thickness.
C1 [Charlton, David G.] USN, Inst Dent & Biomed Res, Great Lakes, IL 60088 USA.
[Roberts, Howard W.] USAF, Dent Evaluat & Consultat Serv, Great Lakes, IL USA.
[Berzins, David W.] Marquette Univ, Milwaukee, WI 53233 USA.
RP Charlton, DG (reprint author), USN, Inst Dent & Biomed Res, 310A B St,Bldg 1-H, Great Lakes, IL 60088 USA.
EM david.charlton@med.navy.mil
NR 26
TC 8
Z9 8
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1496-4155
J9 J ESTHET RESTOR DENT
JI J. Esthet. Restor. Dent.
PY 2009
VL 21
IS 4
BP 262
EP 272
DI 10.1111/j.1708-8240.2009.00273.x
PG 11
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 480EY
UT WOS:000268716300011
PM 19689726
ER
PT J
AU Doman, DB
Gamble, BJ
Ngo, AD
AF Doman, David B.
Gamble, Brian J.
Ngo, Anhtuan D.
TI Quantized Control Allocation of Reaction Control Jets and Aerodynamic
Control Surfaces
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Guidance, Navigation, and Control Conference
CY AUG 20-23, 2007
CL Hilton Head Isl, SC
ID VEHICLE CONTROL; OPTIMIZATION; SYSTEM
AB A mixed-integer linear programming approach to mixing continuous and pulsed control effectors is proposed. The method is aimed at applications involving reentry vehicles that are transitioning from exoatmospheric flight to endoatmospheric flight. In this flight phase, aerodynamic surfaces are weak and easily saturated, and vehicles typically rely on pulsed reaction control jets for attitude control. Control laws for these jets have historically been designed using single-axis phase-plane analysis, which has proven to be sufficient for many applications where multi-axis coupling is insignificant and when failures have not been encountered. Here, we propose using a mixed-integer linear programming technique to blend continuous control effectors and pulsed jets to generate moments commanded by linear or nonlinear control laws. When coupled with fault detection and isolation logic, the control effectors can be reconfigured to minimize the impact of control effector failures or damage. When the continuous effectors can provide the desired moments, standard linear programming methods can be used to mix the effectors; however, when the pulsed effectors must be used to augment the aerodynamic surfaces, mixed-integer linear programming techniques are used to determine the optimal combination of jets to fire. The reaction jet control allocator acts as a nonuniform quantizer that applies a moment vector to the-vehicle, which approximates the desired moment generated by a continuous control law. Lyapunov theory is applied to develop a method for determining the region of attraction associated with a quantized vehicle attitude control system.
C1 [Doman, David B.; Gamble, Brian J.; Ngo, Anhtuan D.] USAF, Res Lab, Control Design & Anal Branch, Wright Patterson AFB, OH 45433 USA.
RP Doman, DB (reprint author), USAF, Res Lab, Control Design & Anal Branch, 2210 8th St,Suite 21, Wright Patterson AFB, OH 45433 USA.
EM David.Doman@wpatb.af.mil; Brian.Gamble@wpatb.af.mil;
anhtuan.ngo@wpafb.af.mil
NR 14
TC 21
Z9 28
U1 2
U2 10
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JAN-FEB
PY 2009
VL 32
IS 1
BP 13
EP 24
DI 10.2514/1.37312
PG 12
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 395AR
UT WOS:000262494900001
ER
PT J
AU Summers, TH
Akella, MR
Mears, MJ
AF Summers, Tyler H.
Akella, Maruthi R.
Mears, Mark J.
TI Coordinated Standoff Tracking of Moving Targets: Control Laws and
Information Architectures
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID PLANAR COLLECTIVE MOTION; COOPERATIVE CONTROL; RIGIDITY; COMMUNICATION;
STABILIZATION; PERSISTENCE; GRAPHS
AB In this paper, we present work on the control of autonomous vehicle formations in the context of the coordinated standoff tracking problem. The objective is to use a team of unmanned aircraft to fly a circular orbit around a moving target with prescribed intervehicle angular spacing using only local information. We use the recently introduced Lyapunov guidance vector field approach to achieve the desired circular trajectory. The contributions of this paper involve both single-vehicle. path planning and multiple-vehicle coordination. For single-vehicle path planning, we complete a proof of heading convergence using feedback, which has thus far not been fully addressed in the literature. We also offer a novel approach for heading convergence that does not require continuous feedback in the ideal case (no wind, stationary target), taking advantage of an analytical solution for the guidance field. Further, we use a variable airspeed controller to maintain the circular trajectory despite unknown wind and unknown constant velocity target motion. Adaptive estimates of the unknown wind and target motion are introduced to ensure stability of the circular trajectory. A novel feature of our results is rigorous satisfaction of vehicle-specific kinematic constraints on heading rates and airspeed variations. For multiple-vehicle coordination, we again use a variable airspeed controller to achieve the prescribed angular spacing. We make a connection with some recent work that addresses information architecture in vehicle formations using rigid graph theory. Specifically, we discuss two types of information architectures, symmetric and asymmetric, and implement decentralized control laws that are based on these architectures. The information architectures are scalable in that the number of required communication/sensing links increases linearly with the number of vehicles. The control laws are decentralized in that they use only local information.
C1 [Summers, Tyler H.; Akella, Maruthi R.] Univ Texas Austin, Dept Aerosp Engn & Engn Mech, Austin, TX 78712 USA.
[Mears, Mark J.] USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
RP Summers, TH (reprint author), Univ Texas Austin, Dept Aerosp Engn & Engn Mech, 1501 Barton Springs Rd, Austin, TX 78712 USA.
EM thsummers@mail.utexas.edu; makella@tnail.utexas.edu;
mark.rpears@wpafb.af.mil
NR 28
TC 52
Z9 54
U1 2
U2 8
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JAN-FEB
PY 2009
VL 32
IS 1
BP 56
EP 69
DI 10.2514/1.37212
PG 14
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 395AR
UT WOS:000262494900005
ER
PT J
AU Baldelli, DH
Zeng, J
Lind, R
Harris, C
AF Baldelli, Dario H.
Zeng, Jie
Lind, Rick
Harris, Chuck
TI Flutter-Prediction Tool for Flight-Test-Based Aeroelastic
Parameter-Varying Models
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Atmospheric Flight Mechanics Conference
CY AUG, 2007
CL Hilton Head Isl, SC
AB In this work, a parameter-varying estimation framework is proposed to increase the efficiency of flight testing. The framework generates a set of tools to rapidly evaluate parameters required to certify an aircraft during envelope expansion. The primary innovation is a generalized aeroelastic parameter-varying framework that allows for a variety of approaches and test procedures. The framework considers the variations of aircraft parameters due to flight conditions. The core algorithms are based on the well-developed linear fractional transformation algebra and A analysis for aeroelastic/aeroservoelastic systems. They are built upon an integrated parameter-estimation framework that is robust enough to tolerate real-world flight-testing environments. Two application cases were successfully solved using the algorithms developed during this work. The first case study involved a generic pitch and plunge linear aeroelastic wind-tunnel model. In the second case study, flight-test data from the Aerostructure Test Wing program were used to demonstrate the feasible application of the core algorithms using data coming from actual flight-test programs.
C1 [Baldelli, Dario H.; Zeng, Jie] ZONA Technol Inc, Scottsdale, AZ 85258 USA.
[Lind, Rick] Univ Florida, Gainesville, FL 32611 USA.
[Harris, Chuck] USAF, Flight Test Ctr, Test Wing 412, Edwards AFB, CA 93253 USA.
RP Baldelli, DH (reprint author), ZONA Technol Inc, Scottsdale, AZ 85258 USA.
NR 19
TC 7
Z9 8
U1 0
U2 4
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JAN-FEB
PY 2009
VL 32
IS 1
BP 158
EP 171
DI 10.2514/1.36584
PG 14
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 395AR
UT WOS:000262494900013
ER
PT J
AU Shepherd, MJ
Cobb, RG
Palazotto, AN
Baker, WP
AF Shepherd, Michael J.
Cobb, Richard G.
Palazotto, Anthony N.
Baker, William P.
TI Modal Transformation Method for Deformable Membrane Mirrors
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
AB Active lightweight continuous mirrors such as deformable membrane mirrors provide the capability to form conjugate surfaces that are effective for removing atmospheric distortions of an incoming wave front. Ongoing research for membrane mirrors for space telescopes has highlighted the need for a simple transformation between Zernike basis functions used by the optical community and the physically realizable dynamic modes of a membrane telescope more commonly recognized by the structural engineer. Perfect surface control would have authority to command both Zernike and vibration-mode shapes. However, the basis functions are incongruent in terms of boundary conditions. The research herein attempts to provide a simple tool for reconciling this otherwise imposing incompatibility. This paper provides design criteria for establishing achievable surface-deflection performance inside of a clear-aperture region for a preselected number of desired Zernike polynomials and a number of retained quasi-statically-actuated vibration-mode shapes. The methodology, coined the "modal transformation method" by the authors, is contrasted with a direct projection method in an applied example performed on a MSC.Nastran nonlinear finite element model of a piezoelectric-actuated deformable membrane mirror.
C1 [Shepherd, Michael J.; Cobb, Richard G.; Palazotto, Anthony N.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Baker, William P.] USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
RP Shepherd, MJ (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 22
TC 1
Z9 1
U1 1
U2 2
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD JAN-FEB
PY 2009
VL 32
IS 1
BP 276
EP 289
DI 10.2514/1.33344
PG 14
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 395AR
UT WOS:000262494900023
ER
PT J
AU Stiefel, BA
AF Stiefel, Baird A.
TI Critical Path: A Brief History of Critical Infrastructure Protection in
the United States
SO JOURNAL OF HOMELAND SECURITY AND EMERGENCY MANAGEMENT
LA English
DT Book Review
C1 [Stiefel, Baird A.] Jacksonville State Univ, Jacksonville, AL 36265 USA.
[Stiefel, Baird A.] US AF Cent Command Emergency Management & CBRN, SMSgt, Shaw AFB, SC 29152 USA.
RP Stiefel, BA (reprint author), Jacksonville State Univ, Jacksonville, AL 36265 USA.
EM jsu6873m@jsu.edu
NR 4
TC 0
Z9 0
U1 2
U2 2
PU BERKELEY ELECTRONIC PRESS
PI BERKELEY
PA 2809 TELEGRAPH AVENUE, STE 202, BERKELEY, CA 94705 USA
SN 1547-7355
J9 J HOMEL SECUR EMERG
JI J. Homel. Secur. Emerg. Manag.
PY 2009
VL 6
IS 1
AR 1
PG 5
WC Public Administration
SC Public Administration
GA 408NA
UT WOS:000263440500008
ER
PT J
AU Tyree, K
Tyree, MM
DiGeronimo, R
AF Tyree, K.
Tyree, M. M.
DiGeronimo, R.
TI CORRELATION OF BRAIN TISSUE OXYGENATION WITH CEREBRAL NIRS AND SYSTEMIC
SVO2 DURING VA ECMO IN A PORCINE MODEL
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
CT Southern Regional Meeting of the
American-Federation-for-Medical-Research
CY FEB 12-14, 2009
CL New Orleans, LA
SP Amer Federat Med Res, So Reg
C1 [Tyree, K.; Tyree, M. M.; DiGeronimo, R.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD JAN
PY 2009
VL 57
IS 1
BP 362
EP 362
PG 1
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA 497VU
UT WOS:000270092400749
ER
PT J
AU Gillette, R
AF Gillette, R.
TI HIGH FREQUENCY (HF) VENTILATOR TIDAL VOLUME (TV) DISTRIBUTION TO
INHOMOGENEOUS LUNGS IN A NEONATAL TEST LUNG MODEL
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
CT Southern Regional Meeting of the
American-Federation-for-Medical-Research
CY FEB 12-14, 2009
CL New Orleans, LA
SP Amer Federat Med Res, So Reg
C1 [Gillette, R.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD JAN
PY 2009
VL 57
IS 1
BP 385
EP 385
PG 1
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA 497VU
UT WOS:000270092400830
ER
PT J
AU Allibhai, T
Digeronimo, R
Whitin, J
Yu, T
Salazar, J
Shoemaker, M
Cohen, H
Dixon, P
Madan, A
AF Allibhai, T.
Digeronimo, R.
Whitin, J.
Yu, T.
Salazar, J.
Shoemaker, M.
Cohen, H.
Dixon, P.
Madan, A.
TI BIOMARKERS OF CEREBRAL INJURY IN A NEONATAL PIG MODEL OF CARDIOPULMONARY
BYPASS AND CIRCULATORY ARREST AT 18 degrees C and 25 degrees C WITH AND
WITHOUT SELECTIVE CEREBRAL PERFUSION
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
CT Southern Regional Meeting of the
American-Federation-for-Medical-Research
CY FEB 12-14, 2009
CL New Orleans, LA
SP Amer Federat Med Res, So Reg
C1 [Allibhai, T.; Digeronimo, R.; Shoemaker, M.; Dixon, P.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
[Whitin, J.; Yu, T.; Cohen, H.; Madan, A.] Stanford Univ, Palo Alto, CA 94304 USA.
[Salazar, J.] Texas Childrens Hosp, Houston, TX 77030 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD JAN
PY 2009
VL 57
IS 1
BP 413
EP 413
PG 1
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA 497VU
UT WOS:000270092400930
ER
PT J
AU Thota, S
Kokubo, K
Tan, LS
Chiang, L
AF Thota, Sammaiah
Kokubo, Ken
Tan, Loon-Seng
Chiang, Long
TI Synthesis of Highly Luminescent Tris-Fluorenyl Chromophores as
Intermediates of Potential Nonlinear Photonic Materials
SO JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
LA English
DT Article
DE tris-fluorenyl chromophore; C3 symmetry; diphenylaminofluorene;
stereoisomer; luminescent compound; photonic nanomaterials
ID ENHANCED 2-PHOTON ABSORPTION; C-60-DIPHENYLAMINOFLUORENE DYAD;
PHOTOPHYSICAL PROPERTIES; ENERGY-TRANSFER; CROSS-SECTION; MOLECULES;
C-60; DONOR
AB In our effort to enhance the cross section of simultaneous multiphoton absorption of C60-based photonic nanomaterials, a novel highly luminescent tris-fluorenyl ring-interconnected chromophore tris-DPAF-C9 was designed and synthesized using a C3 symmetrical triaminobenzene core as the synthon. The structural moiety bears a close resemblance to that of 2-diphenylamino-9,9-dialkylfluorenyl attachment in the previously studied C60( DPAF-Cn)x. The product tris-DPAF-C9 was fully characterized by NMR, UV, IR, and MALDI-TOF MS spectroscopic methods. Based on the molecular energy calculation at MOPAC PM3 level, it suggested the presence of two possible cis/trans stereoisomers on the configuration of fluorenyl moieties. Consequently, a lower heat formation (Hf) of 19.9 kcal/mol was found for the tris-cis C9-isomer as the favorable one vs 47.9 kcal/mol for the bis-mono-trans C9-isomer.
C1 [Thota, Sammaiah; Kokubo, Ken; Chiang, Long] Univ Massachusetts Lowell, Dept Chem, Inst Nanosci & Technol, Lowell, MA 01854 USA.
[Kokubo, Ken] Osaka Univ, Grad Sch Engn, Div Appl Chem, Suita, Osaka 5650871, Japan.
[Tan, Loon-Seng] USAF, Mat & Mfg Directorate, AFRL RXBN, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Chiang, L (reprint author), Univ Massachusetts Lowell, Dept Chem, Inst Nanosci & Technol, Lowell, MA 01854 USA.
EM Long_Chiang@uml.edu
RI Tan, Loon-Seng/F-6985-2012;
OI Tan, Loon-Seng/0000-0002-2134-9290; Kokubo, Ken/0000-0002-8776-7102
NR 20
TC 0
Z9 0
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1060-1325
J9 J MACROMOL SCI A
JI J. Macromol. Sci. Part A-Pure Appl. Chem.
PY 2009
VL 46
IS 12
BP 1165
EP 1171
AR PII 916557363
DI 10.1080/10601320903340028
PG 7
WC Polymer Science
SC Polymer Science
GA 516TT
UT WOS:000271566600003
ER
PT J
AU White, TJ
Serak, SV
Tabiryan, NV
Vaia, RA
Bunning, TJ
AF White, Timothy J.
Serak, Svetlana V.
Tabiryan, Nelson V.
Vaia, Richard A.
Bunning, Timothy J.
TI Polarization-controlled, photodriven bending in monodomain liquid
crystal elastomer cantilevers
SO JOURNAL OF MATERIALS CHEMISTRY
LA English
DT Article
ID PHOTOINDUCED ALIGNMENT; AZOBENZENE MOIETIES; NEMATIC ELASTOMERS;
POLYMER-FILMS; SIDE-CHAIN; LIGHT; ACTUATORS; BEHAVIOR
AB We report on the fast and optically controlled angular bending of cantilevers made from liquid crystal polymer networks functionalized with azobenzene moieties (azo-LCN). For potential applications such as adaptive optics, photoresponsive cantilevers should rapidly deform to controlled angles while maintaining a modulus that can accomplish appreciable mechanical work. This work demonstrates cantilevers made of monodomain azo-LCN containing pendant (side chain) azobenzene mesogens with a storage modulus of 1.4 GPa bend 85 degrees in less than 300 ms upon exposure to 442 nm irradiation. Moreover, the bending angle of these monodomain azo-LCN cantilevers can be controlled by the polarization angle of the source relative to the long-axis of the cantilever. The bending performance (deformation angle and speed) of this monodomain system is compared to a polydomain analogue. The impact of azobenzene concentration, laser intensity, and thickness on these parameters is also presented.
C1 [White, Timothy J.; Vaia, Richard A.; Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[White, Timothy J.] Gen Dynam Informat Technol, Dayton, OH USA.
[Serak, Svetlana V.; Tabiryan, Nelson V.] BEAM Engn Adv Measurements, Winter Pk, FL USA.
RP Bunning, TJ (reprint author), USAF, Res Lab, Mat & Mfg Directorate, 3005 Hobson Way B-651 Ste 1, Wright Patterson AFB, OH 45433 USA.
EM timothy.bunning@wpafb.af.mil
RI White, Timothy/D-4392-2012
FU Air Force Office of Scientific Research; Materials and Manufacturing
Directorate at the Air Force Research Laboratory
FX We gratefully acknowledge funding from the Air Force Office of
Scientific Research and the Materials and Manufacturing Directorate at
the Air Force Research Laboratory. Thanks also to Kelly Burke (Case
Western Reserve University) and Patrick Mather (Syracuse University) for
mechanical characterization and Hilmar Koerner (UTC Corp.) for X-ray
analysis.
NR 31
TC 101
Z9 101
U1 6
U2 48
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0959-9428
J9 J MATER CHEM
JI J. Mater. Chem.
PY 2009
VL 19
IS 8
BP 1080
EP 1085
DI 10.1039/b818457g
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 406CG
UT WOS:000263272000005
ER
PT J
AU Jiang, H
Grant, JT
Enlow, J
Su, WJ
Bunning, TJ
AF Jiang, Hao
Grant, John T.
Enlow, Jesse
Su, Weijie
Bunning, Timothy J.
TI Surface oxygen in plasma polymerized films
SO JOURNAL OF MATERIALS CHEMISTRY
LA English
DT Article
ID ELECTRON-SPIN-RESONANCE; RAY PHOTOELECTRON-SPECTROSCOPY; FREE-RADICAL
FORMATION; PHOTONIC FILMS; CHEMICAL-STRUCTURE; THIN-FILMS; IRON;
OXIDATION; COPOLYMERIZATION; HYDROCARBONS
AB For plasma polymerized (PP) thin films, many practical optical, electronic, sensing, and bio-applications are closely related to their surface properties. In particular, the surfaces of many PP films have a strong affinity for oxygen and moisture. Therefore, three different types of monomers which do not contain oxygen were selected to fabricate PP films, in order to understand the mechanisms for surface oxygen absorption. These monomers were a hydrocarbon, benzene (B); ferrocene (FC), containing Fe ions which have a great affinity for oxygen; and octafluorocyclobutane (OFCB), containing the strong electronegative (and thus oxygen repellent) element fluorine. X-Ray photoelectron spectroscopy (XPS), Fourier transform infra-red (FTIR) spectroscopy, and electron spin resonance (ESR) were used to explore the chemical composition and structure of the resulting PP films. XPS depth-profiling was also used to investigate the oxygen content in the bulk of the films by analyzing the film surface after various amounts of argon etching. The initial oxygen content on the surface of the PP-FC films was the largest of the three while PP-OFCB films only contained a trace quantity. PP-B films had an intermediate concentration. Affinity for oxygen for this latter film was determined to be due to residual activated species including free radicals and dangling bond sites on the film surface. Depth profiling disclosed little oxygen a short distance into the PP-B films, indicating that the oxygen was attracted after deposition upon exposure to ambient conditions. Although the PP-B film exhibited a high concentration of free radicals as determined by ESR, the dense and crosslinked bulk structure shielded these active centers in the film by prohibiting oxygen diffusion. For the PP-FC films, although a decrease in the amount of oxygen was observed after etching, a substantial concentration of oxygen exists with the depth, indicating incorporation of oxygen during the initial deposition. Because of the chemical nature of fluorine, the as-deposited PP-OFCB films did not exhibit significant affinity towards oxygen. However, a slightly oxygen enriched film surface was present after argon etching due to changes in the surface chemistry and structure. These results demonstrate that the formation and distribution of oxygen on and within the PP films are strongly dependent upon the chemical composition and structure of the films.
C1 [Jiang, Hao; Grant, John T.; Enlow, Jesse; Su, Weijie; Bunning, Timothy J.] Mat & Mfg Directorate, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
[Jiang, Hao; Bunning, Timothy J.] Mat Sci & Tech Applicat LLC, Dayton, OH 45458 USA.
[Grant, John T.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Enlow, Jesse] UES Inc, Dayton, OH 45432 USA.
[Su, Weijie] AT&T Govt Solut, Fairborn, OH 45324 USA.
RP Jiang, H (reprint author), Mat & Mfg Directorate, AF Res Lab, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
NR 41
TC 15
Z9 16
U1 1
U2 11
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0959-9428
J9 J MATER CHEM
JI J. Mater. Chem.
PY 2009
VL 19
IS 15
BP 2234
EP 2239
DI 10.1039/b816814h
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 426YS
UT WOS:000264745300020
ER
PT J
AU Hsiao, VKS
Yong, KT
Cartwright, AN
Swihart, MT
Prasad, PN
Lloyd, PF
Bunning, TJ
AF Hsiao, Vincent K. S.
Yong, Ken-Tye
Cartwright, Alexander N.
Swihart, Mark T.
Prasad, Paras N.
Lloyd, Pamela F.
Bunning, Timothy J.
TI Nanoporous polymeric photonic crystals by emulsion holography
SO JOURNAL OF MATERIALS CHEMISTRY
LA English
DT Article
ID ORDERED MACROPOROUS MATERIALS; GRATINGS; PHASE; FABRICATION; SPHERES
AB We report the holographic photopatterning of a microemulsion with a formamide polar phase and an acrylate monomer-containing nonpolar phase to produce polymer structures with periodic nanoscale porosity. Formamide is a highly polar solvent that forms well dispersed, nonaqueous emulsion droplets within the monomer-containing nonpolar phase before holographic patterning. Photochemically initiated polymerization of the nonpolar phase generates ordered structures defined by the holographic interference. Evaporation of the formamide from this lamellar structure yields a multilayered stack that acts as a photonic crystal (PC) with high optical reflectivity and a wide reflection bandwidth. The size of formamide droplets in the photopolymer fluid must be controlled to have a narrow distribution and peak near 60 nm to fabricate PC with high reflectivity. Addition of a sodium dioctyl sulfosuccinate (AOT) surfactant helps to stabilize the formamide microemulsion which further facilitates the formation of ordered nanopores with a uniform size.
C1 [Yong, Ken-Tye; Cartwright, Alexander N.; Swihart, Mark T.; Prasad, Paras N.] SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA.
[Hsiao, Vincent K. S.] Natl Chi Nan Univ, Dept Appl Mat & Optoelectron Engn, Nantou Hsien 54561, Taiwan.
[Prasad, Paras N.] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
[Lloyd, Pamela F.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Cartwright, AN (reprint author), SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA.
EM anc@buffalo.edu
RI Swihart, Mark/A-3182-2008; Hsiao, Vincent/M-7329-2013; Cartwright,
Alexander/C-4380-2008
OI Swihart, Mark/0000-0002-9652-687X; Hsiao, Vincent/0000-0002-6121-7292;
Cartwright, Alexander/0000-0002-0921-8036
FU Chemistry and Life Sciences Directorate of the Air Force Office of
Scientific Research, the Air Force Research Laboratory, Materials and
Manufacturing Directorate [F496200110358]; National Research Council,
Taiwan (NSC) [972221E260003]
FX The research was supported by the DURINT grant F496200110358 from the
Chemistry and Life Sciences Directorate of the Air Force Office of
Scientific Research, the Air Force Research Laboratory, Materials and
Manufacturing Directorate, and in part by the National Research Council,
Taiwan (NSC 972221E260003). The authors thank Mr Wei-Ting Chang for
dynamic light scattering measurements.
NR 30
TC 13
Z9 13
U1 1
U2 11
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0959-9428
EI 1364-5501
J9 J MATER CHEM
JI J. Mater. Chem.
PY 2009
VL 19
IS 23
BP 3998
EP 4003
DI 10.1039/b823247d
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 453MX
UT WOS:000266615800026
ER
PT J
AU Baek, JB
Lyons, CB
Tan, LS
AF Baek, Jong-Beom
Lyons, Christopher B.
Tan, Loon-Seng
TI Macromolecular dumbbells: synthesis and photophysical properties of
hyperbranched poly(etherketone)-b-polybenzobisthiazole-b-hyperbranched
poly(etherketone) ABA triblock copolymers
SO JOURNAL OF MATERIALS CHEMISTRY
LA English
DT Article
ID DENDRITIC BLOCK-COPOLYMERS; ATOMIC-FORCE MICROSCOPY; PARA-AROMATIC
POLYMERS; LIGHT-EMITTING-DIODES; RIGID-ROD POLYMERS; CONJUGATED
POLYMERS; THERMAL-PROPERTIES; MOLECULAR BRUSHES; MAIN CHAIN; MONOMERS
AB A series of hyperbranched poly(etherketone)-b-poly(benzobisthiazole)-b-hyperbranched poly(etherketone) triblock copolymers were synthesized. Two different types of hyperbranched poly(etherketone)s (PEKs) were utilized as dendritic A-block units and carboxylic acid-terminated polybenzobisthiazoles (PBZTs) with two different molecular weights as a conjugated, optically responsive, rigid-rod B-block units to afford dumbbell-shaped ABA triblock copolymers. Although all dumbbell-shaped samples are soluble in strong acids such as trifluoroacetic acid (TFA), methanesulfonic acid (MSA), trifluoromethanesulfonic acid (TFMSA) and sulfuric acid, only phenoxy-terminated dumbbell shaped triblock copolymers (3a and 3b) were soluble in common polar aprotic solvents such as NMP, DMF, DMAc and DMSO. Their solubility in common organic solvents was apparently a consequence arising from the obstruction of the close packing of PBZT components by the bulky dendritic PEK ends. A very surprising and interesting observation was made when the 3a and 3b solutions in NMP were placed under room light for 24 h: all major absorption peaks became featureless and blue-shifted. This photochromism was investigated by static and dynamic UV-absorption and fluorescence spectroscopy under various conditions. Although the response time was quite long, it could be controlled as a function of excitation wavelength, light intensity, and solvent viscosity and/or polarity. We propose that the origin of observed spectral changes is caused by the change in conjugation lengths of PBZT in the dumbbell-shaped ABA triblock copolymers.
C1 [Baek, Jong-Beom] UNIST, Sch Nano Bio Chem Engn, Ulsan 689805, South Korea.
[Lyons, Christopher B.; Tan, Loon-Seng] USAF, Res Lab, Wright Patterson AFB,Mat & Mfg Directorate, RXBN,Nanostructured & Biol Mat Branch, Dayton, OH 45433 USA.
RP Baek, JB (reprint author), UNIST, Sch Nano Bio Chem Engn, 194 Banyeon, Ulsan 689805, South Korea.
EM jbbaek@unist.ac.kr; Loon-Seng.Tan@wpafb.af.mil
RI Baek, Jong-Beom/E-5883-2010; Tan, Loon-Seng/F-6985-2012
OI Baek, Jong-Beom/0000-0003-4785-2326; Tan, Loon-Seng/0000-0002-2134-9290
FU US Air Force Office of Scientific Research; Asian Office of Aerospace RD
(AFOSR-AOARD); Korea Science and Engineering Foundation
[R01-2007-000-10031-02]; Korea Research Foundation [KRF-2006-D00432]
FX This project was supported by funding from US Air Force Office of
Scientific Research, Asian Office of Aerospace R&D (AFOSR-AOARD), Korea
Science and Engineering Foundation (R01-2007-000-10031-02) and Korea
Research Foundation (KRF-2006-D00432).
NR 51
TC 6
Z9 6
U1 1
U2 13
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0959-9428
J9 J MATER CHEM
JI J. Mater. Chem.
PY 2009
VL 19
IS 24
BP 4172
EP 4182
DI 10.1039/b901483g
PG 11
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 455WC
UT WOS:000266797500017
ER
PT J
AU Sathiraju, S
Barnes, PN
Wheeler, RA
AF Sathiraju, Srinivas
Barnes, Paul N.
Wheeler, Robert A.
TI Formation of the YBa(2)Cu(2)NbO(y) phase in thin films
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID BA2YNBO6 BUFFER LAYERS; YBA2CU3O7-X; PEROVSKITE; GROWTH; NB
AB We report the systematic substitution of Nb at the Cu1 site of YBa(2)Cu(3)O(y) in thin films to form a new phase of YBa(2)Cu(2)NbO(8). These films were deposited on SrTiO(3)(100) crystals using pulsed laser deposition and deposited at an optimal temperature of 850 degrees C. Films were characterized using x-ray diffraction (XRD), atomic force microscopy, x-ray photoelectron spectroscopy (XPS), micro-Raman spectroscopy, and transmission electron microscopy. XRD of these films indicate c-axis oriented YBa(2)Cu(2)NbO(y) formation. XPS and micro-Raman spectroscopy analysis suggests Cu exists in the +2 state.
C1 [Sathiraju, Srinivas; Barnes, Paul N.] USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
[Wheeler, Robert A.] Mat & Mfg Directorate UES, Wright Patterson AFB, OH 45433 USA.
RP Barnes, PN (reprint author), USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
EM paul.barnes@wpafb.af.mil
NR 14
TC 0
Z9 0
U1 0
U2 0
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD JAN
PY 2009
VL 24
IS 1
BP 212
EP 216
DI 10.1557/JMR.2009.0009
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 460SN
UT WOS:000267207500026
ER
PT J
AU Yakovlev, VV
Petrov, GI
Zhang, HF
Noojin, GD
Denton, ML
Thomas, RJ
Scully, MO
AF Yakovlev, Vladislav V.
Petrov, Georgi I.
Zhang, Hao F.
Noojin, Gary D.
Denton, Michael L.
Thomas, Robert J.
Scully, Marlan O.
TI Stimulated Raman scattering: old physics, new applications
SO JOURNAL OF MODERN OPTICS
LA English
DT Article; Proceedings Paper
CT 39th Colloquium on Physics of Quantum Electronics
CY JAN 04-08, 2009
CL Snowbird, UT
DE Raman; stimulated Raman; ultrashort laser pulses; biomedical imaging
ID PHOTOACOUSTIC MICROSCOPY; SPECTROSCOPY; VIBRATIONS; LASER
AB Stimulated Raman scattering is a promising way of expanding the tunability of ultrafast lasers and is an exciting new biomedical imaging modality capable of selective excitation and chemically-specific diagnostics of molecular species.
C1 [Yakovlev, Vladislav V.; Petrov, Georgi I.] Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA.
[Zhang, Hao F.] Univ Wisconsin, Dept Elect Engn, Milwaukee, WI 53201 USA.
[Noojin, Gary D.; Denton, Michael L.] Northrop Grumman, Life Sci Res & Applicat Dept, San Antonio, TX 78228 USA.
[Thomas, Robert J.] USAF, Res Lab, HPW 711, RHDO, Brooks City Base, TX 78235 USA.
[Scully, Marlan O.] Texas A&M Univ, Dept Phys, College Stn, TX 77840 USA.
[Scully, Marlan O.] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
RP Yakovlev, VV (reprint author), Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA.
EM yakovlev@uwm.edu
RI Yakovlev, Vladislav/P-4668-2015; Zhang, Hao/H-6199-2012; Zhang,
Hao/C-2451-2015
FU NIBIB NIH HHS [R03 EB008535, R03 EB008535-02]
NR 19
TC 13
Z9 13
U1 0
U2 10
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0950-0340
J9 J MOD OPTIC
JI J. Mod. Opt.
PY 2009
VL 56
IS 18-19
BP 1970
EP 1973
DI 10.1080/09500340903082671
PG 4
WC Optics
SC Optics
GA 527QE
UT WOS:000272380800010
PM 20354585
ER
PT J
AU Yu, KO
Grabinski, CM
Schrand, AM
Murdock, RC
Wang, W
Gu, BH
Schlager, JJ
Hussain, SM
AF Yu, Kyung O.
Grabinski, Christin M.
Schrand, Amanda M.
Murdock, Richard C.
Wang, Wei
Gu, Baohua
Schlager, John J.
Hussain, Saber M.
TI Toxicity of amorphous silica nanoparticles in mouse keratinocytes
SO JOURNAL OF NANOPARTICLE RESEARCH
LA English
DT Article
DE Oxidative stress; Mouse keratinocytes; Size-dependent toxicity of
nanoparticles; Nanotechnology; Occupational health; EHS
ID WALL CARBON NANOTUBES; PULMONARY TOXICITY; INDUCED APOPTOSIS; GENE
DELIVERY; QUANTUM DOTS; PARTICLES; NANOTOXICOLOGY; PENETRATION;
FABRICATION; CELLS
AB The present study was designed to examine the uptake, localization, and the cytotoxic effects of well-dispersed amorphous silica nanoparticles in mouse keratinocytes (HEL-30). Mouse keratinocytes were exposed for 24 h to various concentrations of amorphous silica nanoparticles in homogeneous suspensions of average size distribution (30, 48, 118, and 535 nm SiO(2)) and then assessed for uptake and biochemical changes. Results of transmission electron microscopy revealed all sizes of silica were taken up into the cells and localized into the cytoplasm. The lactate dehydrogenase (LDH) assay shows LDH leakage was dose- and size-dependent with exposure to 30 and 48 nm nanoparticles. However, no LDH leakage was observed for either 118 or 535 nm nanoparticles. The mitochondrial viability assay (MTT) showed significant toxicity for 30 and 48 nm at high concentrations (100 mu g/mL) compared to the 118 and 535 nm particles. Further studies were carried out to investigate if cellular reduced GSH and mitochondria membrane potential are involved in the mechanism of SiO(2) toxicity. The redox potential of cells (GSH) was reduced significantly at concentrations of 50, 100, and 200 mu g/mL at 30 nm nanoparticle exposures. However, silica nanoparticles larger than 30 nm showed no changes in GSH levels. Reactive oxygen species (ROS) formation did not show any significant change between controls and the exposed cells. In summary, amorphous silica nanoparticles below 100 nm induced cytotoxicity suggest size of the particles is critical to produce biological effects.
C1 [Yu, Kyung O.; Grabinski, Christin M.; Schrand, Amanda M.; Murdock, Richard C.; Schlager, John J.; Hussain, Saber M.] USAF, Res Lab, Appl Biotechnol Branch, Human Effectiveness Directorate, Dayton, OH USA.
[Wang, Wei; Gu, Baohua] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Hussain, SM (reprint author), USAF, Res Lab, Appl Biotechnol Branch, Human Effectiveness Directorate, Dayton, OH USA.
EM saber.hussain@wpafb.af.mil
RI Wang, Wei/B-5924-2012; Gu, Baohua/B-9511-2012
OI Gu, Baohua/0000-0002-7299-2956
FU Air Force Office of Scientific Research (AFOSR) [BIN 2312A214]
FX The authors like to thank Col J. Riddle for his strong support and
encouragement for this research. Our thanks also go to Paul Bloomer and
Richard Freeman for their computer support. This work was supported by
the Air Force Office of Scientific Research (AFOSR) Project (BIN#
2312A214).
NR 25
TC 109
Z9 110
U1 4
U2 29
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1388-0764
J9 J NANOPART RES
JI J. Nanopart. Res.
PD JAN
PY 2009
VL 11
IS 1
BP 15
EP 24
DI 10.1007/s11051-008-9417-9
PG 10
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 389WM
UT WOS:000262125200003
ER
PT J
AU Collins, P
McGuirk, J
AF Collins, Peter
McGuirk, Jeffrey
TI A novel methodology for deriving improved material parameter sets for
simplified cylindrical cloaks
SO JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
LA English
DT Article
DE invisibility cloak; transformation optics; simplified material
parameters
ID MAXWELLS EQUATIONS
AB A new way to define simplified material parameters for cylindrical cloaks is developed. A Taylor series expansion of mu(theta) dictated by a new constraint equation developed for simplified cylindrical cloak parameters, followed by solving for epsilon(z) and mu(r) leads to simplified cloaks with significantly improved scattering width performance when compared to previous published results. Numerical simulations show scattering width reductions for all angles of observation. Ideal results are approached as the number of terms in the Taylor series goes to infinity. We also show the simplified parameter set developed by Yan et al is simply the first term in this more general expansion.
C1 [Collins, Peter; McGuirk, Jeffrey] USAF, Dept Elect Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Collins, P (reprint author), USAF, Dept Elect Engn, Inst Technol, 2950 HobsonWay, Wright Patterson AFB, OH 45433 USA.
EM peter.collins@afit.edu
NR 25
TC 9
Z9 9
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1464-4258
J9 J OPT A-PURE APPL OP
JI J. Opt. A-Pure Appl. Opt.
PD JAN
PY 2009
VL 11
IS 1
AR 015104
DI 10.1088/1464-4258/11/1/015104
PG 8
WC Optics
SC Optics
GA 393LY
UT WOS:000262376000007
ER
PT J
AU Fechine, PBA
Silva, EN
de Menezes, AS
Derov, J
Stewart, JW
Drehman, AJ
Vasconcelos, IF
Ayala, AP
Cardoso, LP
Sombra, ASB
AF Fechine, P. B. A.
Silva, E. N.
de Menezes, A. S.
Derov, J.
Stewart, J. W.
Drehman, A. J.
Vasconcelos, I. F.
Ayala, A. P.
Cardoso, L. P.
Sombra, A. S. B.
TI Synthesis, structure and vibrational properties of GdIG(X):YIG(1-X)
ferrimagnetic ceramic composite
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article
ID SOL-GEL METHOD; IRON-GARNET; MAGNETIC-PROPERTIES; YTTRIUM-ALUMINUM;
TEMPERATURE; PARTICLES; OXIDES; YIG
AB Y3Fe5O12 (YIG) crystal has many attractive characteristics, such as low dielectric loss, narrow resonance linewidth in microwave region and also possesses a good saturated magnetization value. Composite technology in general sets out to combine materials in such a way that the properties of the composite are the optimum for a particular application. The different materials work together to give a composite of unique properties. In this work, we present the preparation procedure (obtaining) of the GdIG(x):YIG(1-X) ferrimagnetic ceramic matrix composite by mechanical alloying and calcinations. Besides that, we study its properties by X-ray powder diffraction, infrared, Micro-Raman, Fe-57 Mossbauer spectroscopy and hysteresis loop measurements. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Fechine, P. B. A.] Univ Fed Ceara, Dept Quim Analit & Fis Quim, BR-60451970 Fortaleza, Ceara, Brazil.
[Fechine, P. B. A.] Univ Fed Ceara, Dept Quim Organ & Inorgan, BR-60451970 Fortaleza, Ceara, Brazil.
[Fechine, P. B. A.; Sombra, A. S. B.] Univ Fed Ceara, Dept Fis, Lab Telecomunicacoes & Ciencia & Engn Mat, BR-60451970 Fortaleza, Ceara, Brazil.
[de Menezes, A. S.; Cardoso, L. P.] Univ Estadual Campinas, IFGW, BR-13083970 Campinas, SP, Brazil.
[Derov, J.; Stewart, J. W.; Drehman, A. J.] Sensors Directorate, AF Res Lab, Bedford, MA 01731 USA.
[Vasconcelos, I. F.] Univ Fed Ceara, Dept Mat & Met Engn, BR-60455760 Fortaleza, Ceara, Brazil.
RP Fechine, PBA (reprint author), Univ Fed Ceara, Dept Quim Analit & Fis Quim, Campus Pici,CP 12100, BR-60451970 Fortaleza, Ceara, Brazil.
EM fechine@ufc.br
RI Ayala, Alejandro/A-7518-2008; Universidade Federal do Ceara, Physics
Department/J-4630-2016; Vasconcelos, Igor/G-6800-2012; Sombra, Antonio
/B-2963-2013; Inst. of Physics, Gleb Wataghin/A-9780-2017; UFC,
DF/E-1564-2017; Cardoso, Lisandro/G-5766-2012; Silva, Eder/H-3653-2012;
Fechine, Pierre/B-7937-2013; 8, INCT/H-6363-2013; 51, INCT/H-6644-2013;
Fotonica, INCT/H-9159-2013; Nanobiosimes, Inct/K-2263-2013; de Menezes,
Alan Silva/N-1415-2014
OI Ayala, Alejandro/0000-0002-9247-6780; Universidade Federal do Ceara,
Physics Department/0000-0002-9247-6780; Vasconcelos,
Igor/0000-0002-6172-805X; Cardoso, Lisandro/0000-0003-3910-2293;
Fechine, Pierre/0000-0002-7822-2354;
NR 39
TC 12
Z9 12
U1 0
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-3697
J9 J PHYS CHEM SOLIDS
JI J. Phys. Chem. Solids
PD JAN
PY 2009
VL 70
IS 1
BP 202
EP 209
DI 10.1016/j.jpcs.2008.10.008
PG 8
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 395YH
UT WOS:000262558900033
ER
PT J
AU Chang, PP
Hansen, NA
Phoenix, RD
Schneid, TR
AF Chang, Paul P.
Hansen, Nancy A.
Phoenix, Rodney D.
Schneid, Thomas R.
TI The Effects of Primers and Surface Bonding Characteristics on the
Adhesion of Polyurethane to Two Commonly Used Silicone Elastomers
SO JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
LA English
DT Article
DE Polyurethane silicone; Sofreliner; maxillofacial; A-2000; MDX4-4210;
Tokuyama; Mucopren; Tokuyama Sofreliner MS; Tokuyama Sofreliner T;
T-peel test; interfacial peel distance
AB Purpose: When restoring facial defects, maxillofacial prosthodontists and anaplastologists are often limited by material deficiencies. Silicone elastomers bonded to a polyurethane liner best satisfy the functional and esthetic requirements necessary for facial prostheses; however, patients using silicone prostheses with polyurethane liners often experience varying degrees of debonding at the polyurethane-silicone interfaces. This may result in failure of such prostheses. The purpose of this investigation was to evaluate the effects of five primers on bonding between polyurethane and two commonly used silicone elastomers.
Material and Methods: Six bonding regimens were used to join polyurethane and silicone materials. Each treatment group consisted of 12 specimens. Bonding regimens included (1) a 40: 60 mixture of MDX4-4210 and Silastic Medical Adhesive Type A, in conjunction with Dow Corning 1205 primer (Udagama's technique); (2) silicone A-2000 with Dow Corning 1205 primer; (3) silicone A-2000 with A-330-G primer; (4) silicone A-2000 with Mucopren primer; (5) silicone A-2000 with Sofreliner T primer; and (6) silicone A-2000 with Sofreliner MS primer. Following fabrication, specimens were attached to a universal testing machine and separated in tension at a crosshead speed of 25.4 mm/min. One examiner performed the assessment of T-peel strength (N/mm), peak load (N), and peel distance (mm) for all specimens. Mean data were analyzed using one-way ANOVA followed by Fisher's protected significant difference multiple comparison of the means (alpha = 0.05).
Results: A statistically significant difference (p < 0.05) in T-peel strength was found among specimen groups. Post hoc analysis indicated that Sofreliner MS primer (1.32 +/- 0.13 N/mm) and Sofreliner T primer (1.25 +/- 0.11 N/mm) increased the bond strengths significantly compared to A-330-G primer (0.91 +/- 0.10 N/mm) and Udagama's technique (0.13 +/- 0.02 N/mm). Cohesive failure between silicone A-2000 and polyurethane liner was observed when Sofreliner MS primer and Sofreliner T were used.
Conclusion: Within the limitations of this study, the use of Sofreliner MS primer and Sofreliner T primer produced significant increases in the bond strength of silicone elastomer to polyurethane liner material. Based on T-peel strength, peel distance, and peak load data, the combination of silicone A-2000 and Sofreliner MS primer resulted in the greatest mean bond strength for silicone-to-polyurethane applications.
C1 [Chang, Paul P.; Hansen, Nancy A.; Phoenix, Rodney D.] Univ Texas Hlth Sci Ctr San Antonio, Dept Prosthodont, San Antonio, TX USA.
[Schneid, Thomas R.] Wilford Hall USAF Med Ctr, United States Air Force Prosthodont Residency Pro, Lackland AFB, TX 78236 USA.
RP Chang, PP (reprint author), UTHSCSA Grad Prosthodont, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA.
EM changpp@uthscsa.edu
FU ACP
FX Research supported in part by an ACP Research Fellowship 3M/ESPE Grant.
NR 15
TC 12
Z9 15
U1 1
U2 11
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1059-941X
J9 J PROSTHODONT
JI J. Prosthodont.
PD JAN
PY 2009
VL 18
IS 1
BP 23
EP 31
DI 10.1111/j.1532-849X.2008.00371.x
PG 9
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA V17CA
UT WOS:000207914100006
PM 19166545
ER
PT J
AU Blake, WB
Johnson, AF
AF Blake, William B.
Johnson, Arik F.
TI Assessment of Straight Tapered Geometry Approximations of Raked-Tip
Wings
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article; Proceedings Paper
CT 10th Symposium on Materials in Space Environment/8th Conference on
Protection of Materials and Structures from Space Environment
CY JUN 19-23, 2006
CL Collioure, FRANCE
SP ONERA, CNES, ITL, Canadian Space Agcy
AB Straight tapered geometry approximations to wings with raked tips art presented. Only wings with breaks in file trailing-edge sweep are considered. Comparisons are made with predictions from a vortex-lattice code for a series of uncumbered. untwisted wing planforms with raked tips and 10 straight tapered approximations to those planforms. Limited comparisons with experimental data are also shown. Lift-curve slope, aerodynamic center, lateral center of pressure, roll damping and lateral stability are compared for 47 planforms, The most accurate method maintained the area, span, leading-edge sweep, and mean aerodynamic chord of the raked-tip planform, generating a new root and tip chord.
C1 [Blake, William B.] USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
[Johnson, Arik F.] Univ Maryland, Dept Aerosp Engn, College Pk, MD 20714 USA.
RP Blake, WB (reprint author), USAF, Res Lab, Air Vehicles Directorate, 2210 8th St, Wright Patterson AFB, OH 45433 USA.
NR 13
TC 0
Z9 0
U1 2
U2 4
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD JAN-FEB
PY 2009
VL 46
IS 1
BP 103
EP 111
DI 10.2514/1.36817
PG 9
WC Engineering, Aerospace
SC Engineering
GA 409UJ
UT WOS:000263531000015
ER
PT J
AU Johnson, AW
Michalski, SC
Stiegelmeier, A
Pope, J
Martindale, M
AF Johnson, Alan W.
Michalski, Sydney C.
Stiegelmeier, Adam
Pope, John
Martindale, Michael
TI Modeling Regeneration Time and Ground Support Manpower for a Reusable
Launch Vehicle
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article; Proceedings Paper
CT 10th Symposium on Materials in Space Environment/8th Conference on
Protection of Materials and Structures from Space Environment
CY JUN 19-23, 2006
CL Collioure, FRANCE
SP ONERA, CNES, ITL, Canadian Space Agcy
AB The military is pursuing a low-cost, responsive reusable launch vehicle that can rapidly place payloads in orbit in response to national defense requirements. The reusable launch vehicle is currently in the early stages of its design phase, when it is critical to assess design alternatives in terms of their operational capabilities as well as their life cycle support requirements. The U.S. Air Force Research Laboratory developed the space access vehicles mission and operations simulation (SAVMOS) model suite to assist in evaluating the mission cycle of the reusable launch vehicle. Part of the functionality of SAVMOS is the maintenance, integration, and launch pad operations simulation and test (MILEPOST) model. MILEPOST allows the user to evaluate candidate designs and perform tradeoff studies for the impact of design characteristics on regeneration time and support personnel requirements. We discuss MILEPOST development and present insights on process time and workforce sizing for several design alternatives.
C1 [Johnson, Alan W.; Michalski, Sydney C.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Stiegelmeier, Adam] USAF, Air Mobil Command, Aircraft Maintenance Div, Scott AFB, IL 62225 USA.
[Pope, John] USAF, Finance & Cost Management Branch, Hill AFB, UT 84056 USA.
[Martindale, Michael] USAF, Space & Missile Def Branch, Washington, DC 20050 USA.
RP Johnson, AW (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 17
TC 0
Z9 0
U1 0
U2 1
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD JAN-FEB
PY 2009
VL 46
IS 1
BP 168
EP 176
DI 10.2514/1.34916
PG 9
WC Engineering, Aerospace
SC Engineering
GA 409UJ
UT WOS:000263531000023
ER
PT J
AU Bulutoglu, DA
Ryan, KJ
AF Bulutoglu, Dursun A.
Ryan, Kenneth J.
TI D-optirnal and near D-optimal 2(k) fractional factorial designs of
resolution V
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE D-optimal designs; Fedorov exchange algorithm; Orthogonal arrays;
Resolution V; Generalized type 1 criterion; Generalized type 2 criterion
ID ORTHOGONAL ARRAYS; CONSTRUCTION; ALGORITHMS
AB Upper bounds for the determinant of the information matrix of a 2(k) fractional factorial design of resolution V are improved. Highly D-efficient 2(k) fractional factorial designs of resolution V for 3 <= k <= 8 are found using the heuristic algorithms of Nguyen and Miller [1992. A review of some exchange algorithms for constructing discrete D-optimal designs. Comput. Statist. Data Anal. 14,489-498] and Miller and Nguyen [1994. Algorithm AS 295: a Feclorov exchange algorithm for D-optimal designs. Appl. Statist. 43, 669-678]. Some of these designs are shown to be D-optimal or generalized type 1 (type 2) optimal. A method for constructing D-optimal or nearly D-optimal resolution V designs from smaller D-optimal or nearly D-optimal resolution V designs is presented. Lower bounds for D-efficiencies are tabulated. Published by Elsevier B.V
C1 [Bulutoglu, Dursun A.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Ryan, Kenneth J.] Bowling Green State Univ, Bowling Green, OH 43403 USA.
RP Bulutoglu, DA (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM dursun.bulutoglu@afit.edu; kjryan@bgnet.bgsu.edu
NR 18
TC 5
Z9 5
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3758
EI 1873-1171
J9 J STAT PLAN INFER
JI J. Stat. Plan. Infer.
PD JAN 1
PY 2009
VL 139
IS 1
SI SI
BP 16
EP 22
DI 10.1016/j.jspi.2008.05.012
PG 7
WC Statistics & Probability
SC Mathematics
GA 369QQ
UT WOS:000260709400003
ER
PT J
AU Coletta, D
AF Coletta, Damon
TI Promoting Peace with Information
SO JOURNAL OF STRATEGIC STUDIES
LA English
DT Book Review
C1 [Coletta, Damon] USAF Acad, Colorado Springs, CO 80840 USA.
RP Coletta, D (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0140-2390
J9 J STRATEGIC STUD
JI J. Strateg. Stud.
PY 2009
VL 32
IS 5
BP 807
EP 810
PG 4
WC International Relations; Political Science
SC International Relations; Government & Law
GA 524KT
UT WOS:000272142900009
ER
PT J
AU Marsh, DW
Baldwin, RO
Mullins, BE
Mills, RF
Grimaila, MR
AF Marsh, David W.
Baldwin, Rusty O.
Mullins, Barry E.
Mills, Robert F.
Grimaila, Michael R.
TI A security policy language for wireless sensor networks
SO JOURNAL OF SYSTEMS AND SOFTWARE
LA English
DT Article
DE Wireless sensor network; Data security; Security policy; Security policy
composition
AB Authenticated computer system users are only authorized to access certain data within the system. In the future, wireless sensor networks (WSNs) will need to restrict access to data as well. To date, WSN security has largely been based on encryption and authentication schemes. The WSN Authorization Specification Language (WASL) is a mechanism-independent composable WSN policy language that can specify arbitrary and composable security policies that are able to span and integrate multiple WSN policies. Using WASL, a multi-level security policy for a 1000 node network requires only 60 bytes of memory per node. Published by Elsevier Inc.
C1 [Marsh, David W.; Baldwin, Rusty O.; Mullins, Barry E.; Mills, Robert F.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Grimaila, Michael R.] USAF, Inst Technol, Dept Syst & Engn Management, Wright Patterson AFB, OH 45433 USA.
RP Baldwin, RO (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM rusty.baldwin@afit.edu
NR 18
TC 5
Z9 6
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0164-1212
EI 1873-1228
J9 J SYST SOFTWARE
JI J. Syst. Softw.
PD JAN
PY 2009
VL 82
IS 1
SI SI
BP 101
EP 111
DI 10.1016/j.jss.2008.05.010
PG 11
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 391JZ
UT WOS:000262230900008
ER
PT J
AU Kosaraju, A
Vandewalle, KS
AF Kosaraju, Amar
Vandewalle, Kraig S.
TI A comparison of a refrigerant and a topical anesthetic gel as
preinjection anesthetics A clinical evaluation
SO JOURNAL OF THE AMERICAN DENTAL ASSOCIATION
LA English
DT Article; Proceedings Paper
CT 37th Annual Meeting of the American-Association-for-Dental-Research
CY APR 02-05, 2008
CL Dallas, TX
SP Amer Assoc Dent Res
DE Pain measurement; palate; anesthetics; local anesthetics; topical
anesthetics
ID VISUAL ANALOG; PAIN; INJECTIONS; LIDOCAINE; CHILDREN; SCALES; FEAR
AB Background. The authors used a split-mouth design to determine the effectiveness of a refrigerant compared with that of a topical anesthetic gel in reducing the pain experienced during a posterior palatal anesthetic injection.
Methods. Sixteen participants received a five-second application of a refrigerant (1,1,1,3,3-pentafluoropropane/1,1,1,2-tetrafluoroethane) and a two-minute application of a topical anesthetic gel (20 percent benzocaine gel) in the posterior palatal area before an injection of a local anesthetic solution was administered with a 30-gauge needle. Participants rated the pain they experienced after each injection by using a 100-millimeter visual analog scale (VAS) with endpoints of "no pain" and "worst possible pain." The authors calculated VAS scores by measuring the distance in millimeters from the no pain end of the scale. They analyzed data with a paired t test (alpha = .05).
Results. The group receiving the refrigerant had a mean VAS score of 17.7 +/- 15.3 mm, end the group receiving the topical anesthetic gel had a VAS score of 26.2 +/- 18.0 mm. The use of the refrigerant compared with the use of topical anesthetic gel significantly reduced the pain experienced during administration of local anesthetic injections (P = .02).
Conclusions. The use of a refrigerant as a preinjection anesthetic was more effective compared with the use of a topical anesthetic gel in reducing the pain experienced by participants who received a posterior palatal injection.
Clinical Implications. The potential benefits of using a refrigerant rather than a topical anesthetic gel are pain reduction, decreased application time, ease of application and avoidance of displeasing taste.
C1 [Kosaraju, Amar] Bolling AFB, Washington, DC 20332 USA.
[Vandewalle, Kraig S.] Wilford Hall USAF Med Ctr, Lackland AFB, San Antonio, TX 78236 USA.
RP Kosaraju, A (reprint author), Bolling AFB, 579 DS-SGD,238 Brookley Ave, Washington, DC 20332 USA.
EM amar.kosaraju@afncr.af.mil
NR 33
TC 7
Z9 8
U1 1
U2 3
PU AMER DENTAL ASSOC
PI CHICAGO
PA 211 E CHICAGO AVE, CHICAGO, IL 60611 USA
SN 0002-8177
J9 J AM DENT ASSOC
JI J. Am. Dent. Assoc.
PD JAN
PY 2009
VL 140
IS 1
BP 68
EP 72
PG 5
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 392SV
UT WOS:000262323400016
PM 19119169
ER
PT J
AU Kota, KM
Chow, LC
Du, JH
Kapao, JS
Leland, QH
Harris, RJ
AF Kota, Krishna M.
Chow, Louis C.
Du, Jianhua
Kapao, Jayanta S.
Leland, Quinn H.
Harris, Richard J.
TI Numerical Analysis of Heat Storage Phenomenon in a Dual Latent Heat Sink
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article; Proceedings Paper
CT AIAA 46th Aerospace Sciences Meeting and Exhibit
CY JAN 07-10, 2008
CL Reno, NV
SP Amer Inst Aeronaut & Astronaut
ID PHASE-CHANGE PROBLEMS; THERMAL-CONDUCTIVITY; NATURAL-CONVECTION;
VERTICAL SURFACE; ENTHALPY METHOD; CONDENSATION; SYSTEMS; DESIGN; FOAM
AB This paper focuses on the numerical analysis of the heat storage phenomenon in a dual latent heat sink intended for low thermal duty cycle electronic heat sink applications. The effectiveness of this heat sink depends on the rapidness of the charging facility in the design during the pulse heat generation period of the duty cycle. Heat storage in this heat sink involves the transient simultaneous laminar film condensation of vapor and melting of an encapsulated phase change material in graphite foam. The key focus of this paper is to numerically analyze this conjugate heat transfer problem including the wall inertia effect and thus verify the effectiveness of the heat storage mechanism of the heat sink. An effective heat capacity formulation is employed for modeling the phase change problem and is solved using the finite element method. The results of the developed model showed that the concept is effective in preventing an undue temperature rise of the system.
C1 [Kota, Krishna M.; Chow, Louis C.; Du, Jianhua; Kapao, Jayanta S.] Univ Cent Florida, Orlando, FL 32816 USA.
[Leland, Quinn H.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Harris, Richard J.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Kota, KM (reprint author), Univ Cent Florida, Orlando, FL 32816 USA.
NR 29
TC 2
Z9 2
U1 0
U2 4
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD JAN-MAR
PY 2009
VL 23
IS 1
BP 148
EP 156
DI 10.2514/1.36386
PG 9
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 400BH
UT WOS:000262842500015
ER
PT J
AU Johnson, JD
Fiala, NJ
Ames, FE
AF Johnson, J. D.
Fiala, N. J.
Ames, F. E.
TI Gill Slot Trailing Edge Aerodynamics: Effects of Blowing Rate, Reynolds
Number, and External Turbulence on Aerodynamic Losses and Pressure
Distribution
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article
CT 52nd ASME Turbo Expo 2007
CY MAY 14-17, 2007
CL Montreal, CANADA
SP Amer Soc Mech Engineers, Int Gas Turbine Inst
ID FLOW MEASUREMENTS; TURBINE CASCADE; MECHANISMS
AB Gill slots (also called cutbacks) are a common method to cool the trailing edge of vanes and blades and to eject spent cooling air Exit surveys detailing total pressure loss, turning angle, and secondary velocities have been acquired for a gill slot vane in a large-scale, low speed cascade facility These measurements are compared with exit surveys of the base (solid) vane configuration. Exit surveys have been taken over a four to one range in chord Reynolds numbers (500,000, 1,000,000, and 2,000,000) based on exit conditions and for low, (0.7%), grid (8.5%), and aerocombustor (13.5%) turbulence conditions with varying blowing rate (50%, 100%, 150%, and 200% design flows). Exit loss, angle, and secondary velocity measurements were acquired in the facility using a five-hole cone probe at two stations representing axial chord spacings of 0.25 and 0.50. Differences between losses with and without the gill slot for a given turbulence condition and Reynolds number are compared providing evidence of coolant ejection losses and losses due to the separation off the gill slot lip. Additionally, differences in the level of losses, distribution of losses, and secondary flow vectors are presented for the different turbulence conditions and at the different Reynolds numbers. The turbulence condition has been found to have only a small effect on the increase in losses due to the gill slot. However, decreasing Reynolds number has been found to produce an increasing increment in losses. The present paper together with a companion paper (2007, "Gill Slot Trailing Edge Heat Transfer-Effects of Blowing Rate, Reynolds Number and External Turbulence on Heat Transfer and Film Cooling Effectiveness" ASME Paper No. GT2007-27397), which documents gill slot heat tran, fer is intended to provide designers with the heat transfer and aerodynamic loss information needed to compare competing trailing edge designs. trailing edge designs. [DOI: 10. 1115/1.2813002]
C1 [Johnson, J. D.] USAF, Hill AFB, UT 84056 USA.
[Fiala, N. J.] Univ N Dakota, Energy & Environm Res Ctr, Grand Forks, ND 58202 USA.
[Ames, F. E.] Univ N Dakota, Dept Mech Engn, Grand Forks, ND 58202 USA.
RP Johnson, JD (reprint author), USAF, 518 Combat Sustainment Squadron, Hill AFB, UT 84056 USA.
NR 27
TC 0
Z9 0
U1 1
U2 3
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD JAN
PY 2009
VL 131
IS 1
AR 011016
DI 10.1115/1.2813002
PG 11
WC Engineering, Mechanical
SC Engineering
GA 442KL
UT WOS:000265840000016
ER
PT B
AU Randeniya, DIB
Gunaratne, M
Sarkar, S
AF Randeniya, Duminda I. B.
Gunaratne, Manjriker
Sarkar, Sudeep
BE Ganguly, AR
Gama, J
Omitaomu, OA
Gaber, MM
Vatsavai, RR
TI Fusion of Vision Inertial Data for Automatic Georeferencing
SO KNOWLEDGE DISCOVERY FROM SENSOR DATA
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
DE Multisensor fusion; inertial vision fusion; intelligent transportation
systems
AB Intermittent loss of the GPS signal is a common problem encountered in intelligent land navigation based on GPS integrated inertial systems. This issue emphasizes the need for an alternative technology that would ensure smooth and reliable inertial navigation during GPS outages. This paper presents the results of an effort where data from vision and inertial sensors are integrated. However, for such integration one has to first obtain the necessary navigation parameters from the available sensors. Due to the variety in the measurements, separate approaches have to be utilized in estimating the navigation parameters. Information from a sequence of images captured by a monocular camera attached to a survey vehicle at a maximum frequency of three frames per second was used in upgrading the inertial system installed in the same vehicle for its inherent error accumulation. Specifically, the rotations and translations estimated from point correspondences tracked through a sequence of images were used in the integration. Also a prefilter is utilized to smooth out the noise associated with the vision sensor (camera) measurements. Finally, the position locations based on the vision sensor are integrated with the inertial system in a decentralized format using a Kalman filter. The vision/inertial integrated position estimates are successfully compared with those from inertial/GPS system output. This successful comparison demonstrates that vision can be used successfully to supplement the inertial measurements during potential GPS outages.
C1 [Sarkar, Sudeep] Univ S Florida, Dept Comp Sci & Engn, Tampa, FL 33620 USA.
[Gunaratne, Manjriker] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA.
[Randeniya, Duminda I. B.] Oak Ridge Natl Lab, Decis Engn Grp, Oak Ridge, TN 37831 USA.
[Gunaratne, Manjriker] NASA, Robert Goddard Space Flight Ctr, Washington, DC USA.
[Gunaratne, Manjriker] USAF, Wright Patterson AFB, OH 45433 USA.
RP Randeniya, DIB (reprint author), Oak Ridge Natl Lab, Decis Engn Grp, Oak Ridge, TN 37831 USA.
RI Sarkar, Sudeep/A-8213-2009
OI Sarkar, Sudeep/0000-0001-7332-4207
NR 19
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8232-6
J9 IND INNOV SER
PY 2009
BP 107
EP 130
PG 24
WC Business; Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Electrical & Electronic; Management
SC Business & Economics; Computer Science; Engineering
GA BJY05
UT WOS:000267390500008
ER
PT J
AU Oprea-Ilies, GM
Kendall, BS
Cameron, S
Birdsong, G
Stelow, EB
Pambuccian, SE
AF Oprea-Ilies, G. M.
Kendall, B. S.
Cameron, S.
Birdsong, G.
Stelow, E. B.
Pambuccian, S. E.
TI Increase in the LSIL/HSIL Ratio over Time: A Reflection of Effective
Screening
SO LABORATORY INVESTIGATION
LA English
DT Meeting Abstract
CT 98th Annual Meeting of the
United-States-and-Canadian-Academy-of-Pathology
CY MAR 07-13, 2009
CL Boston, MA
SP US & Canadian Acad Pathol
C1 Emory Univ, Grady Mem Hosp, Atlanta, GA 30322 USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
Hennepin Cty Med Ctr, Minneapolis, MN 55415 USA.
Univ Virginia, Charlottesville, VA USA.
Univ Minnesota, Minneapolis, MN 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 0023-6837
J9 LAB INVEST
JI Lab. Invest.
PD JAN
PY 2009
VL 89
MA 404
BP 92A
EP 92A
PG 1
WC Medicine, Research & Experimental; Pathology
SC Research & Experimental Medicine; Pathology
GA 394XK
UT WOS:000262486300405
ER
PT S
AU Roy, S
Gurao, N
Suwas, S
Tamirisakandala, S
Srinivasan, R
Miracle, DB
AF Roy, Shibayan
Gurao, Nilesh
Suwas, Satyam
Tamirisakandala, S.
Srinivasan, R.
Miracle, D. B.
BE Rollett, AD
TI TEXTURE EVOLUTION IN BORON MODIFIED TI-6AL-4V ALLOY
SO MATERIALS PROCESSING AND TEXTURE
SE Ceramic Transactions
LA English
DT Proceedings Paper
CT 15th International Conference on Textures of Materials
CY JUN 01-06, 2008
CL Pittsburgh, PA
SP Natl Sci Fdn, Air Force Off Sci Res, Alcoa Technical Ctr
ID CAST TITANIUM-ALLOYS; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES;
MICROSTRUCTURE; PHASE
AB Owing to their high strength-to-weight ratio, excellent mechanical properties and corrosion resistance, titanium (Ti) and its alloys, especially (alpha+beta) alloys like Ti-6Al-4V is the backbone materials for aerospace, energy, and chemical industries. Trace boron addition (similar to 0.1 wt. %) to the alloy Ti-6Al-4V produces a reduction in as-cast grain size by roughly an order of magnitude resulting in enhanced ductility, higher stiffness, strength and good fracture resistance. Boron addition could also affect the evolution of texture and microstructure in the material. The solidification microstructures of Boron free as well as Boron containing Ti-6Al-4V are found to be almost homogeneous from periphery towards the center of as-cast ingot in terms of both alpha-colony size and distribution. Boron addition substantially reduces alpha-colony size (similar to 50-80 mu m). A gradual change in alpha texture from periphery towards the center has been observed with orientations close to specific texture components suggesting the formation of texture zones. The mechanism of texture evolution can be visualized as a result of variant selection during solidification through (alpha+beta) phase field.
C1 [Roy, Shibayan; Gurao, Nilesh; Suwas, Satyam] Indian Inst Sci, Lab Texture & Related Studies, Dept Mat Engn, Bangalore 560012, Karnataka, India.
[Tamirisakandala, S.] Ohio Univ, Dept Mech Engn, Athens, OH 45701 USA.
[Srinivasan, R.] Wright State Univ, Mech & Mat Engn Dept, Dayton, OH USA.
[Miracle, D. B.] Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Roy, S (reprint author), Indian Inst Sci, Lab Texture & Related Studies, Dept Mat Engn, Bangalore 560012, Karnataka, India.
RI Gurao, Nilesh/C-6797-2011
NR 16
TC 0
Z9 0
U1 0
U2 2
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 1042-1122
BN 978-0-470-44419-1; 978-0-470-40834-6
J9 CERAM TRANS
PY 2009
VL 200
BP 585
EP 592
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA BTO68
UT WOS:000287579000063
ER
PT B
AU Secrest, BR
Lamont, GB
AF Secrest, Barry R.
Lamont, Gary B.
GP IEEE
TI Multiobjective Tuning of a Multitarget Tracking Algorithm using an
Evolutionary Algorithm
SO MCDM: 2009 IEEE SYMPOSIUM ON COMPUTATIONAL INTELLIGENCE IN
MULTI-CRITERIA DECISION-MAKING
LA English
DT Proceedings Paper
CT IEEE Symposium on Computational Intelligence in Multi-Criteria
Decision-Making
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
DE Multitarget Tracking; Multiobjective Evolutionary Algorithm; Monte Carlo
Analysis; Kalman Filter
AB Multitarget tracking MTT algorithms have been tuned by a variety of optimization methods using a single objective, but only recently have they been tuned with multiobjectives techique. The desire to compare single-objective MTT algorithms using numerous metrics is well documented in the literature for over a decade. We discuss an experiment to quantify the need or lack of need for Monte Carlo (MC) runs in tuning the parameters of a MTT algorithm using some of these metrics. The extreme computational requirement of running a MTT MC experiment for each individual evaluation function drives the need to determine the worth of doing so. The results of using a single run are compared to that of using a MC evaluation with multiple runs as compared to a multiobjective evolutionary algorithm approach. Additional analysis is performed on the search space demonstrating other useful information the decision maker may use to select an optimal operating point from a calculated Pareto Front.
C1 [Secrest, Barry R.; Lamont, Gary B.] USAF, Inst Technol, Grad Sch Engn & Management, Dept Elect & Comp Engn,WPAFB, Dayton, OH 45429 USA.
RP Secrest, BR (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Dept Elect & Comp Engn,WPAFB, Dayton, OH 45429 USA.
EM Barry.Secrest@AFIT.edu; Gary.Lamont@AFIT.edu
NR 12
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2764-2
PY 2009
BP 51
EP 57
PG 7
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BME60
UT WOS:000272028200008
ER
PT B
AU Jade, A
Madria, SK
Linderman, M
AF Jade, Anil
Madria, Sanjay Kumar
Linderman, Mark
GP IEEE
TI Incentive Based Routing Protocol for Mobile Peer to Peer Networks
SO MDM: 2009 10TH INTERNATIONAL CONFERENCE ON MOBILE DATA MANAGEMENT
LA English
DT Proceedings Paper
CT 10th International Conference on Mobile Data Management
CY MAY 18-20, 2009
CL Taipei, TAIWAN
SP Natl Chiao Tung Univ, Dept Comp Sci
ID MODEL
AB Incentive models are becoming increasingly popular in Mobile Peer to Peer Networks (M-P2P) as these models entice node participation in return for a virtual currency to combat free riding and to effectively manage constraint resources in the network. Many routing protocols proposed are based on best effort data traffic policy, such as the shortest route selection (hop minimization). Using virtual currency to find a cost effective optimal route from the source to the destination, while considering Quality of Service (QoS) aspects such as bandwidth and service capacity constraints for data delivery, remains a challenging task due to the presence of multiple paths and service providers. Modeling the network as a directed weighted graph and using the cost acquired from the price function as an incentive to pay the intermediate nodes in M-P2P networks to forward data, we develop a Game theoretic approach based on stochastic games to find an optimal route considering QoS aspect. The performance of our routing protocol is evaluated and compared with some existing routing protocols and the result shows that our protocol proves to be efficient compared to shortest-path DSR and multiple paths SMR in terms of average response time, energy and bandwidth utilization in the network.
C1 [Jade, Anil; Madria, Sanjay Kumar] Missouri Univ Sci & Technol, Dept Comp Sci, Rolla, MO 65409 USA.
[Linderman, Mark] Air Force Res Lab, Rone, NY USA.
RP Jade, A (reprint author), Missouri Univ Sci & Technol, Dept Comp Sci, Rolla, MO 65409 USA.
EM akjbnd@mst.edu; madrias@mst.edu; mark.linderman@rl.af.mil
NR 16
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4153-2
PY 2009
BP 285
EP +
DI 10.1109/MDM.2009.42
PG 2
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BMZ49
UT WOS:000273978000032
ER
PT S
AU Braun, JC
Ruggles-Wrenn, MB
AF Braun, J. C.
Ruggles-Wrenn, M. B.
BE Salem, J
Hilmas, G
Fahrenholtz, W
Ohji, T
Wereszczak, A
TI EFFECTS OF TEMPERATURE AND STEAM ENVIRONMENT ON CREEP BEHAVIOR OF AN
OXIDE-OXIDE CERAMIC COMPOSITE
SO MECHANICAL PROPERTIES AND PROCESSING OF CERAMIC BINARY,TERNARY, AND
COMPOSITE SYSTEMS
SE CERAMIC ENGINEERING AND SCIENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 32nd International Conference on Advanced Ceramics and Composites
CY JAN 27-FEB 01, 2008
CL Daytona Beach, FL
SP Amer Ceram Soc, ACerS Engn Ceram Div
ID BRITTLE-MATRIX COMPOSITES; MECHANICAL-PROPERTIES; POROUS-MATRIX;
WATER-VAPOR; MULLITE/ALUMINA MIXTURES; CRACK-PROPAGATION; FIBER
COMPOSITES; STRESS-CORROSION; FATIGUE BEHAVIOR; COATING CONCEPTS
AB The tensile creep behavior of an oxide-oxide continuous fiber ceramic composite (CFCC) was investigated at 1000 and 1100 degrees C in laboratory air and in steam. The composite consists of a porous alumina matrix reinforced with laminated. woven mullite/alumina (Nextel (TM) 720) fibers, has no interface between the fiber and matrix, and relies on the porous matrix for flaw tolerance. The tensile stress-strain behavior was investigated and the tensile properties measured. Tensile creep behavior was examined for creep stresses in the 80-150 MPa range. Primary and secondary creep regimes were observed in creep tests at all temperatures investigated. Creep rates increased with increasing temperature and creep stress. The presence of steam accelerated creep rates and dramatically reduced creep life. The detrimental effects of steam become progressively more pronounced with increasing temperature. At 1000 degrees C, creep run-out defined as 100 h at creep stress was achieved in all tests. At 1100 degrees C, creep run-out was achieved in all tests in air and only in the 100 MPa test in steam. The residual strength and modulus of all specimens that achieved run-out were characterized. Composite microstructure, as well as damage and failure mechanisms were investigated.
C1 [Braun, J. C.; Ruggles-Wrenn, M. B.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Ruggles-Wrenn, MB (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 58
TC 0
Z9 0
U1 1
U2 2
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 0196-6219
BN 978-0-470-34492-7
J9 CERAM ENG SCI PROC
PY 2009
VL 29
IS 2
BP 151
EP 166
DI 10.1002/9780470456361.ch15
PG 16
WC Materials Science, Ceramics; Materials Science, Composites
SC Materials Science
GA BJE30
UT WOS:000265134900015
ER
PT J
AU Ross, NC
Mishra, RS
Senkov, ON
Miracle, DB
AF Ross, Neal C.
Mishra, Rajiv S.
Senkov, Oleg N.
Miracle, Daniel B.
TI Observation of Shear Thickening during Compressive Flow of
Mg54Y11Ag7Cu28 in the Supercooled Liquid Region
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID BULK METALLIC-GLASS; DEFORMATION; BEHAVIOR
AB Uniaxial compression tests of Mg54Y11Ag7Cu28 metallic glass were performed in the supercooled liquid region (SCLR) (468 K) at a strain rate range of 5 x 10(4) to 2 x 10(3) s(-1). In the course of testing, shear thickening behavior was observed, where the magnitude of the peak stress increases with increasing initial strain rate. The deformation behavior of the glassy metal is discussed with emphasis on the commonly reported stress overshoot, strain softening behavior, and the previously unreported shear thickening behavior observed.
C1 [Ross, Neal C.; Mishra, Rajiv S.] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65401 USA.
[Ross, Neal C.; Mishra, Rajiv S.] Missouri Univ Sci & Technol, Ctr Aerosp Mfg Technol, Rolla, MO 65401 USA.
[Senkov, Oleg N.; Miracle, Daniel B.] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ross, NC (reprint author), Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65401 USA.
EM rsmishra@mst.edu
RI Mishra, Rajiv/A-7985-2009; Senkov, Oleg/C-7197-2012
OI Mishra, Rajiv/0000-0002-1699-0614; Senkov, Oleg/0000-0001-5587-415X
FU Air Force Research Laboratory [FA8650-04-C-704]; AF [FA8650-04-D-5233]
FX The authors thank Dr. S. Reis for his assistance with the DTA work
reported in this study selection. The authors also gratefully
acknowledge the support of the Air Force Research Laboratory through
Contract No. FA8650-04-C-704 and the AF contract FA8650-04-D-5233.
NR 16
TC 1
Z9 1
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD JAN
PY 2009
VL 40A
IS 1
BP 1
EP 3
DI 10.1007/s11661-008-9711-2
PG 3
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 379QS
UT WOS:000261411900001
ER
PT J
AU Hwang, JY
Banerjee, R
Tiley, J
Srinivasan, R
Viswanathan, GB
Fraser, HL
AF Hwang, J. Y.
Banerjee, R.
Tiley, J.
Srinivasan, R.
Viswanathan, G. B.
Fraser, H. L.
TI Nanoscale Characterization of Elemental Partitioning between Gamma and
Gamma Prime Phases in Rene 88 DT Nickel-Base Superalloy
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID ATOM-PROBE TOMOGRAPHY; MORPHOLOGY; MISMATCH; HARDNESS
AB The chemical partitioning of alloying elements between the disordered gamma and ordered gamma' phases in the nickel-base superalloy Rene 88 DT, has been characterized in detail using three-dimensional atom probe tomography (3DAP) coupled with energy filtered transmission electron microscopy (EFTEM) studies. After a homogenization treatment followed by a water quench, it is observed that the morphology of the gamma' precipitates remains near spherical even after long aging times. Compositional variation, observed between small (< 5 nm) and larger gamma' precipitates, reduces with increasing aging time, while the compositional gradient across the gamma/gamma' interface decreases. The process of growth of c gamma' precipitates seems to occur through coalescence of adjacent gamma' precipitates, facilitated through the formation of "necks'' between adjacent precipitates. These necks are observed to have intermediate elemental concentration values between the matrix and the gamma' precipitate compositions.
C1 [Hwang, J. Y.; Banerjee, R.] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA.
[Tiley, J.] USAF, Mat & Mfg Directorate, Res Lab, Dayton, OH 45433 USA.
[Srinivasan, R.; Viswanathan, G. B.; Fraser, H. L.] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
RP Hwang, JY (reprint author), Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA.
EM rajarshi.banerjee@unt.edu
FU United States Air Force Office of Scientific Research [FA9550-06-1-0193]
FX The authors acknowledge the United States Air Force Office of Scientific
Research (AFOSR Grant No. FA9550-06-1-0193) for providing financial
support for this study. In addition, the authors gratefully acknowledge
the Center for Advanced Research and Technology (CART) at the University
of North Texas and the Center for the Accelerated Maturation of
Materials (CAMM) at Ohio State University for access to the experimental
facilities used for this study.
NR 15
TC 28
Z9 28
U1 3
U2 24
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD JAN
PY 2009
VL 40A
IS 1
BP 24
EP 35
DI 10.1007/s11661-008-9691-2
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 379QS
UT WOS:000261411900003
ER
PT B
AU Slocik, JM
Naik, RR
AF Slocik, Joseph M.
Naik, Rajesh R.
BE Rege, K
Medintz, IL
TI Peptide-Nanoparticle Assemblies
SO METHODS IN BIOENGINEERING: NANOSCALE BIOENGINEERING AND NANOMEDICINE
SE Artech House Methods in Bioengineering Series
LA English
DT Article; Book Chapter
DE peptides; biomimetic synthesis; assembly; nanoparticle
ID GOLD NANOPARTICLES; BIMETALLIC NANOPARTICLES; PROTEIN; NANOSTRUCTURES;
BIOMOLECULES; NANOSHELLS; DNA
AB Unlike material science where there is a general lack of control, poorly assembled structures, and high levels of impurities; biology uses precise molecular and genetic control to guide the assembly of complex nanostructures and shapes via proteins/peptides. Experimentally, this is appealing given that proteins or peptides can be used to functionalize a nanoparticle surface and promote assembly through peptide-peptide interactions, formation of supra-molecular structures, and/or recognition of specialized targets. In this chapter, we describe the use of peptides for the controlled assembly of nanoparticles with regard to different, types of interfaces, resulting nanostructures, and enhanced properties.
C1 [Slocik, Joseph M.; Naik, Rajesh R.] USAF, Nanostruct & Biol Mat Branch, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Naik, RR (reprint author), USAF, Nanostruct & Biol Mat Branch, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM rajesh.naik@wpafb.af.mil
NR 32
TC 0
Z9 0
U1 0
U2 2
PU ARTECH HOUSE
PI NORWOOD
PA 685 CANTON ST, NORWOOD, MA 02062 USA
BN 978-1-59693-410-8
J9 ARTECH HSE METH BIOE
JI Art. Hse. Meth. Bioengr. Ser.
PY 2009
BP 25
EP 38
PG 14
WC Engineering, Biomedical; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BKZ87
UT WOS:000269709900002
ER
PT B
AU Metzler, JM
Linderman, MH
Seversky, LM
AF Metzler, James M.
Linderman, Mark H.
Seversky, Lee M.
GP IEEE
TI N-CET: NETWORK-CENTRIC EXPLOITATION AND TRACKING
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB The Network-Centric Exploitation and Tracking (N-CET) program is a research effort to enhance intelligence exploitation in a tactical environment by cross-cueing sensors and fusing data from on-board sources with processed information from off-board platforms and sharing the resulting products in a net-centric manner. At the core of N-CET are information management services that decouple data producers and consumers, allowing reconfiguration to suit mission needs. Network-centric algorithms utilize the availability of information from both homogeneous and complementary on-board and off-board sensors. Organic capabilities facilitate the extraction of actionable information from high bandwidth sensor data and ensure the necessary information arrives at other platforms and users in a timely manner. This paper provides an overview of the N-CET architecture and the sensors and algorithms currently implemented upon it. The extent to which such algorithms are enhanced in a network-centric environment is discussed and the challenges of managing the resulting dynamic information space in a tactical publish/subscribe/query model are presented.
C1 [Metzler, James M.; Linderman, Mark H.; Seversky, Lee M.] USAF, Res Lab, Informat Directorate, Rome, NY 13441 USA.
RP Metzler, JM (reprint author), USAF, Res Lab, Informat Directorate, Rome, NY 13441 USA.
EM james.metzler@rl.af.mil; mark.linderman@rl.af.mil;
lee.seversky@rl.af.mil
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 137
EP 143
PG 7
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509900020
ER
PT B
AU Pack, D
Dudevoir, G
Lima, P
Gruber, S
AF Pack, Daniel
Dudevoir, Glen
Lima, Pedro
Gruber, Scott
GP IEEE
TI Negotiating between Communication and Cooperation for Multiple Unmanned
Aerial Vehicles
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
DE cooperative control; communication network
AB The emerging technologies of multiple, cooperative unmanned systems have brought in an exciting period of possibilities, possibilities of solving challenging problems in medical, social, engineering, and military communities. The technologies have also introduced a growing number of new challenges such as resource allocation, communication and coordination, establishment of consensus, and control optimization among cooperative systems. In this paper, we address one of these challenges for cooperative unmanned aerial systems (UASs): trade-off between maintaining communication reliability among, and collective target search efforts by, a team of unmanned systems. We evaluate the impact on the overall search capability of a cooperative system when the movements of its members are constrained due to the requirement of communication reliability. Our comparative study is based on an adaptation of work reported in [3] and we show our findings using simulation and flight experiment results.
C1 [Pack, Daniel; Dudevoir, Glen; Lima, Pedro; Gruber, Scott] USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
RP Pack, D (reprint author), USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
EM daniel.pack@usafa.edu; glen.dudevoir@usafa.edu; pedro.lima@usafa.edu;
scott.gruber@usafa.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 367
EP 372
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509900053
ER
PT B
AU Gocmen, M
Hopkinson, K
Compton, M
AF Gocmen, Murat
Hopkinson, Kenneth
Compton, Matthew
GP IEEE
TI THE BENEFITS OF A NETWORK TASKING ORDER IN COMBAT SEARCH AND RESCUE
MISSIONS
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB Networked communications play a crucial role in United States Armed Forces operations. As the military moves towards more network centric (Net-Centric) operations, it becomes increasingly important to use the network as effectively as possible with respect to the overall mission. This article advocates the use of a Network Tasking Order (NTO), which allows operators to reason about the network based on asset movement, capabilities, and communication requirements. The NTO is similar to the Air Tasking Order, which gives insight into the plan for physical assets in a military mission. In this paper we illustrate the benefit of an NTO in a Combat Search and Rescue (CSAR) scenario. While demonstrating the CSAR mission, we assume the use of the Joint Tactical Radio System (JTRS) for communication. Our premise is that the knowledge in an NTO can be used to achieve better CSAR missions and yield better decision-making opportunities to the mission commanders. Our results show that the End-to-End (ETE) delay with the aid of an NTO in high traffic conditions is shorter compared to those without the NTO and bandwidth requirements are also lower. In low traffic conditions, the ETE delay is shorter without the aid of an NTO, but at the cost of higher bandwidth utilization.
C1 [Gocmen, Murat; Hopkinson, Kenneth; Compton, Matthew] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Gocmen, M (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 739
EP 745
PG 7
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509900108
ER
PT S
AU Zhou, BA
Tiwari, A
Zhu, KL
Lu, Y
Gerla, M
Ganguli, A
Shen, BH
Krzysiak, D
AF Zhou, Biao
Tiwari, Abhishek
Zhu, Konglin
Lu, You
Gerla, Mario
Ganguli, Anurag
Shen, Bao-hong
Krzysiak, David
GP IEEE
TI GEO-BASED INTER-DOMAIN ROUTING (GIDR) PROTOCOL FOR MANETS
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB Inter-domain routing for MANETs (Mobile Ad Hoc Networks) draws increasing attention because of military and vehicular applications. The existing Border Gateway Protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable to MANETs because the BGP design is based on a static Internet which does not support dynamic discovery of members, and cannot scale to mobile, dynamic topology environments.
The proposed geo-based inter-domain routing (GIDR) protocol obtains efficient communications among MANETs and achieves scalability in large networks by using geo-routing packet forwarding scheme and clustering technique. The basic structure of GIDR is clusters in each domain. The distributed clustering algorithm elects within each domain a Cluster Head (CH). The cluster head in the subnet acts as local DNS for own cluster and also (redundantly) for neighbor clusters. The cluster head advertises to neighbors and the rest of the network its connectivity, members, and domain information. The advertising protocol plays the role of BG Protocol.
Geo-routing is the main packet forwarding scheme in GIDR. Assuming that all nodes are equipped with GPS, greedy forwarding is a straightforward routing scheme and can be easily standardized and implemented in all "coalition" nodes. Moreover, it is inherently scalable and is "address" independent (thus, it works across domain boundaries). If greedy forwarding fails, the packet is "directionally" forwarded to the "most promising" node along the advertised direction, i.e., direction forwarding. The experiments have shown that the proposed inter-domain routing has achieved scalability and robustness to mobility. The simulation results with Airborne Backbone Network, an important application domain in Military, as one of the domains are also presented in the paper.
C1 [Zhou, Biao; Zhu, Konglin; Gerla, Mario] Univ Calif Los Angeles, Dept Comp Sci, Los Angeles, CA 90095 USA.
[Lu, You] Beijing Univ Posts & Telecommun, Beijing 100876, Peoples R China.
[Krzysiak, David] Air Force Res Lab, Rome Res Site RIGC Networking Techn, Wright Patterson AFB, OH 45433 USA.
RP Tiwari, A (reprint author), UtopiaCompression Corp, 11150 Olymp Blvd,Suite 680, Los Angeles, CA 90064 USA.
EM abhishek@utopiacompression.com; anurag@utopiacompression.com;
bao@utopiacompression.com
FU Air Force under the Small Business Innovation Research (SBIR) Phase II
program; Air Force Research Laboratory (AFRL) at Rome Lab
[FA8750-08-C-0127]
FX The work presented in this paper is sponsored in part by the Air Force
under the Small Business Innovation Research (SBIR) Phase II program,
Air Force Research Laboratory (AFRL) at Rome Lab contract number
FA8750-08-C-0127. This work was in collaboration with Professor Mario
Gerla and his team under a subcontract to GPC. The authors would also
like to thank MITRE Corporation, Bedford, MA for their guidance.
NR 16
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 857
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509900126
ER
PT S
AU Tiwari, A
Ganguli, A
Kothari, A
Avadhanam, S
Yadegar, J
Compton, M
Hopkinson, K
AF Tiwari, A.
Ganguli, A.
Kothari, A.
Avadhanam, S.
Yadegar, J.
Compton, M.
Hopkinson, K.
GP IEEE
TI FEASIBILITY OF COMMUNICATION PLANNING IN AIRBORNE NETWORKS USING MISSION
INFORMATION
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB The Department of Defense (DoD) is making strides toward Network Centric Warfare. In modern warfare, information superiority and situational awareness is vital to superiority on the battlefield. That is, whoever can pass relevant information between war fighters in a more timely and efficient manner is more likely to succeed. Therefore, the concept of communication planning for DoD missions should become as critical as mission planning itself Over the years there has been significant research in many areas of mission planning, and most DoD missions are executed in a planned manner. The authors of this paper have in the past independently argued that the availability of mission plans can greatly improve communication planning. For this paper, we team up and closely examine how mission plans can be made available for efficient communication planning from a logistics point of view. In particular, we use the domain of the military Airborne Network (AN) as an example. We consider various degrees of mission information available in different AN missions and present case studies using simulation on the kind of communication planning possible with the given information.
C1 [Tiwari, A.; Ganguli, A.; Kothari, A.; Avadhanam, S.; Yadegar, J.] UtopiaCompression Corp, 11150 W Olymp Blvd,680, Los Angeles, CA 90064 USA.
[Compton, M.; Hopkinson, K.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Tiwari, A (reprint author), UtopiaCompression Corp, 11150 W Olymp Blvd,680, Los Angeles, CA 90064 USA.
EM abhishek@utopiacompression.com; anurag@utopiacompression.com;
aditya@utopiacompression.com; sharath@utopiacompression.com;
joseph@utopiacompression.com; mcompton@afit.edu; khopkins@afit.edu
FU Air Force Small Business Innovation Research Phase II program; Air Force
Research Laboratory at Rome Lab [FA8750-08-C-0127]; UtopiaCompression
Corporation; MITRE Corporation, Bedford, MA
FX The work presented in this paper was sponsored in part by the Air Force
Small Business Innovation Research Phase II program, Air Force Research
Laboratory at Rome Lab contract number FA8750-08-C-0127 to
UtopiaCompression Corporation. UtopiaCompression would also like to
thank MITRE Corporation, Bedford, MA for their guidance.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 1233
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509900182
ER
PT S
AU Laffely, A
Ramakrishnan, B
Timmerman, C
Yao, HA
Hillger, J
AF Laffely, Andrew
Ramakrishnan, Balasubramanian
Timmerman, Chayil
Yao, Huan
Hillger, Jason
GP IEEE
TI IMPLEMENTING EXTREME UPSAMPLING FILTERS WITH A MULTIPLY-LESS
ARCHITECTURE
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB For ease of implementation, communications systems have been steadily converted to digital implementations. FPGA technologies and high-quality, high-speed DACs have enabled this trend. While this is commonly done for modern high bit-rate communications systems, legacy systems like the MIL-STD-188-165A modem are not often considered. One issue is the need to up-sample these slower standards by factors of tens of thousands in order to interface them with the modulation system.
This paper presents an architectural case study on the implementation of a direct digital synthesis MIL-STD-188-165A modem. It briefly describes a multiplyless single stage filter architecture with unlimited up-sampling capabilities. The filter implements a Farrow type design. By selecting the appropriate filter coefficients from a set of look-up-tables (L UT) the filter can be designed to suppress harmonic distortion below the required filter mask. Mathematical evaluation of these properties proves that a reasonable size LUT of 1024x14 bits is sufficient to suppress harmonics below 60dB. A full analysis of harmonic suppression vs. LUT size is included to extend this work beyond the MIL-STD-188-165A case study!
C1 [Laffely, Andrew] USAF Acad, Colorado Springs, CO 80840 USA.
[Ramakrishnan, Balasubramanian] Mitre Corp, Bedford, MA USA.
[Timmerman, Chayil; Yao, Huan; Hillger, Jason] MIT Lincoln Lab, Lexington, MA USA.
RP Laffely, A (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
FU United States Air Force under Air Force [FA8721-05-C-0002]
FX This work is sponsored by the United States Air Force under Air Force
Contract FA8721-05-C-0002. Opinions, interpretations, conclusions and
recommendations are those ofthe authors and are not necessarily endorsed
by the United States Government
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 1499
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901018
ER
PT S
AU Kumar, S
Janarthanan, A
Shakeel, MM
Maroo, S
Matyjas, JD
Medley, M
AF Kumar, Sunil
Janarthanan, Aparna
Shakeel, Mohammed Muslehuddin
Maroo, Swati
Matyjas, John D.
Medley, Michael
GP IEEE
TI ROBUST H.264/AVC VIDEO CODING WITH PRIORITY CLASSIFICATION, ADAPTIVE
NALU SIZE AND FRAGMENTATION
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB In this paper, we discuss a novel priority assignment and packetization scheme to transport H.264/AVC video packets over wireless networks. Specifically, we discuss a comprehensive packet priority assignment scheme for unequal error protection, followed by the use of adaptive network abstraction layer unit (NALU) sizes and NALU fragmentation schemes. These schemes use the standard-compliant decoder with various H.264/AVC error resiliency features. Our simulation results demonstrate that these schemes improve the PSNR performance of test video sequences in the presence of packet losses.
C1 [Kumar, Sunil; Janarthanan, Aparna; Shakeel, Mohammed Muslehuddin; Maroo, Swati] San Diego State Univ, Dept Elect & Comp Engn, San Diego, CA 92182 USA.
[Matyjas, John D.; Medley, Michael] Air Force Res Lab, Griffiss AFB, NY 13441 USA.
RP Kumar, S (reprint author), San Diego State Univ, Dept Elect & Comp Engn, San Diego, CA 92182 USA.
EM skumar@mail.sdsu.edu; aparnajan@gmail.com; shakeel12@gmail.com;
maroo@rohan.sdsu.edu; john.matyjas@rl.af.mil; mike.medley@rl.af.mil
NR 8
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 1702
EP +
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901048
ER
PT S
AU Le, T
Kuthethoor, G
Hansupichon, C
Sesha, P
Strohm, J
Hadynski, G
Kiwior, D
Parker, D
AF Le, Tuong
Kuthethoor, Giri
Hansupichon, Chokchai
Sesha, Prakash
Strohm, John
Hadynski, Gregory
Kiwior, Diane
Parker, David
GP IEEE
TI RELIABLE USER DATAGRAM PROTOCOL FOR AIRBORNE NETWORK
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
DE Reliable UDP; transport protocol; airborne network
AB Applications operating over airborne networks are known to perform quite sub-optimally. Transmission Control Protocol (TCP) based applications often experience very low data throughput [1], while the User Data gram Protocol (UDP) based applications suffer high packet loss as well as out-of-order delivery [2]. This is due to the high Bit Error Rate (BER) nature of the wireless links and the high mobility of airborne nodes. Though TCP and UDP have performed well in wired networks, their original design did not take into consideration the characteristics seen in airborne networks thus resulting in their relatively poor performance. In this research, we implemented an OPNET model of the Reliable User Datagram Protocol (RUDP) as proposed in the IETF Internet-Draft in 1999 [3] with extensions to take into consideration the nature of airborne network characteristics. We then analyzed the performance and its applicability to airborne network scenarios. We also provide performance comparison of the enhanced RUDP against the TCP, UDP, and the standard RUDP counterparts.
C1 [Le, Tuong; Kuthethoor, Giri; Hansupichon, Chokchai; Sesha, Prakash; Strohm, John] Lockheed Martin IS&GS, Gaithersburg, MD USA.
[Hadynski, Gregory] US Air Force, Res Lab, Rome, NY USA.
[Kiwior, Diane] MITRE, Bedford, MA USA.
[Parker, David] Elect Syst Ctr, Hanscom AFB, MA USA.
RP Le, T (reprint author), Lockheed Martin IS&GS, Gaithersburg, MD USA.
EM tuong.le@lmco.com; giri.kuthethoor@lmco.com;
chokchai.hansupichon@lmco.com; prakash.m.sesha@lmco.com;
john.strohm@lmco.com; greg.hadynski@rl.af.mil; dkiwior@mitre.org;
david.parker.ctr@hanscom.af.mill
NR 6
TC 0
Z9 0
U1 3
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 2017
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901096
ER
PT S
AU Cunningham, J
Foulke, D
Goode, T
Baber, D
Gaughan, B
Fletcher, M
Young, DW
Juarez, JC
Sluz, JE
Riggins, JL
AF Cunningham, James
Foulke, Dennis
Goode, Tim
Baber, Dan
Gaughan, Brian
Fletcher, Matthew
Young, David W.
Juarez, Juan C.
Sluz, Joseph E.
Riggins, James L., II
GP IEEE
TI LONG RANGE FIELD TESTING OF FREE SPACE OPTICAL COMMUNICATIONS TERMINALS
ON MOBILE PLATFORMS
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB Ground and air testing of mobile FALCON free-space optical (FSO) communications terminals was performed in New Mexico by ITT Corporation, JHU/APL and AFRL. The testing verified the operation of the terminals pointing, acquisition, tracking and data transmission for ground to ground link distances up to 36 km and air to air and air to ground link distances up to 65 km. The FALCON terminals have a nominal 2.5 gbps bidirectional data link. Packet goodput was generally 90% or better for the tests. Data will be presented on the pointing and acquisition sequence, tracking performance, received power and packet throughput. In addition, analysis of the atmospheric conditions and a comparison of actual performance to expected performance will be presented.
C1 [Cunningham, James; Foulke, Dennis; Goode, Tim; Baber, Dan; Gaughan, Brian; Fletcher, Matthew] ITT Corp, Beavercreek, OH 45431 USA.
[Young, David W.; Juarez, Juan C.; Sluz, Joseph E.; Riggins, James L., II] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
[Young, David W.; Juarez, Juan C.; Sluz, Joseph E.; Riggins, James L., II] US Air Force, Air Force Res Lab RYJM, Wright Patterson AFB, OH 45433 USA.
RP Cunningham, J (reprint author), ITT Corp, Beavercreek, OH 45431 USA.
NR 1
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 2146
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901116
ER
PT B
AU Honore, AA
Thomas, RW
Martin, RK
Kurkowski, SH
AF Honore, Augustine A.
Thomas, Ryan W.
Martin, Richard K.
Kurkowski, Stuart H.
GP IEEE
TI IMPLEMENTATION OF COLLABORATIVE RF LOCALIZATION USING A SOFTWAREDEFINED
RADIO NETWORK
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB Current US. military pursuits, such as the Joint Tactical Radio System (JTRS), are based on a software-defined radio (SDR) system. These kinds of systems use the flexibility of software to make old and new radio technology interoperable. Co-existence of different radio technologies has the potential to be a force enabler, but it still falls short, particularly for military operations in which failure to co-exist can cause interference fratricide between allied radios. We designed a collaborative network of cognitive radios derived from flexible, commercially-available SDRs. Using a network of SDRs as an experimental test bed, we implemented a detection and RF characterization algorithm, gathering signal data from multiple spatially diverse points in the network. This provided three main contributions: determining the process for pre-characterizing the SDRs; developing the measurement procedure for effective transmitter detection and estimation; and identifiring effective real-world network topologies.
C1 [Honore, Augustine A.; Thomas, Ryan W.; Martin, Richard K.; Kurkowski, Stuart H.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Honore, AA (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 2170
EP 2176
PG 7
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901119
ER
PT S
AU Benvegnu, E
Sun, N
Hanna, J
Combs, V
Winkler, R
Kovach, J
AF Benvegnu, Erika
Sun, Niranjan
Hanna, James
Combs, Vaughn
Winkler, Robert
Kovach, Jesse
GP IEEE
TI IMPROVING TIMELINESS AND RELIABILITY OF DATA DELIVERY IN TACTICAL
WIRELESS ENVIRONMENTS WITH MOCKETS COMMUNICATIONS LIBRARY
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB Network centric warfare relies on the timely and reliable delivery of data to disparate cooperating nodes in tactical networking environments. Given the limited bandwidth available and the unreliability of network links, data often accumulates in application and/or network queues, resulting in increased latency in the delivery of the data. The Mockets communications library addresses this problem via dynamic message replacement. The message replacement functionality of Mockets allows the system to drop all but the most recent message within a specific message flow by removing older, outdated messages from the queues. This paper describes and evaluates, in the context of the U.S. Air Force's Joint Battlespace Infosphere (JBI) system, the timeliness of end-to-end delivery of data using the Mockets library.
In addition to dynamic message replacement, other capabilities in the Mockets library include options for reliable vs. unreliable and sequenced vs. unsequenced delivery of data, detailed statistics and feedback regarding the connection, and assignment and dynamic adjustment of priorities of messages. This paper provides a qualitative analysis of these different capabilities and their suitability to address the transport requirements in JBI It also provides a quantitative comparison of Mockets with SCTP and SCPS-TP, which are similar technologies with existing available candidate implementations. Our results show that the Mockets library with the message replacement significantly outperforms these other transport protocols.
C1 [Benvegnu, Erika; Sun, Niranjan] Florida Inst Human & Machine Cognit, Pensacola, FL 32502 USA.
[Hanna, James; Combs, Vaughn] US Air Force, Res Lab, Rome, NY USA.
[Winkler, Robert; Kovach, Jesse] US Army, Res Lab, Adelphi, MD USA.
RP Benvegnu, E (reprint author), Florida Inst Human & Machine Cognit, Pensacola, FL 32502 USA.
FU U.S. Army Research Laboratory [W911NF-04-2-0013]; U.S. Army Research
Laboratory under Collaborative Technology Alliance Program
[DAAD19-01-2-0009]; Air Force Research Laboratory [FA8750-06-2-0064]
FX This work is supported in part by the U.S. Army Research Laboratory
under Cooperative Agreement W911NF-04-2-0013, by the U.S. Army Research
Laboratory under the Collaborative Technology Alliance Program,
Cooperative Agreement DAAD19-01-2-0009, and by the Air Force Research
Laboratory under Cooperative Agreement FA8750-06-2-0064.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 2506
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901169
ER
PT S
AU Scrofano, R
Anderson, PR
Seidel, JP
Train, JD
Wang, GH
Abramowitz, LR
Bannister, JA
Borgeson, D
AF Scrofano, Ronald
Anderson, Paul R.
Seidel, Jorge P.
Train, Joshua D.
Wang, Grace H.
Abramowitz, Lyle R.
Bannister, Joseph A.
Borgeson, David
GP IEEE
TI SPACE-BASED LOCAL AREA NETWORK
SO MILCOM 2009 - 2009 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-4
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM 2009)
CY OCT 18-21, 2009
CL Boston, MA
SP IEEE
AB With the phenomenal success and productivity of terrestrial networks, there is interest in using similar technology in space. For instance, there currently are projects aimed at deploying Internet routers in space. In this paper, we discuss the general concept of connecting a cluster of satellites with a local area network. We discuss the advantages and challenges of such a network, as well as possible missions. We also describe a specific implementation that would connect a cluster of geosynchronous satellites with a network based on the IEEE standard 802.16 protocol. We also describe our testbed and the terrestrial experiments that we are performing to validate our approach.
C1 [Scrofano, Ronald; Anderson, Paul R.; Seidel, Jorge P.; Train, Joshua D.; Wang, Grace H.; Abramowitz, Lyle R.; Bannister, Joseph A.] Aerosp Corp, El Segundo, CA 90245 USA.
[Borgeson, David] US Air Force, Space & Missile Syst Ctr, El Segundo, CA USA.
RP Scrofano, R (reprint author), Aerosp Corp, El Segundo, CA 90245 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4244-5238-5
J9 IEEE MILIT COMMUN C
PY 2009
BP 2598
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQA52
UT WOS:000280509901181
ER
PT J
AU Kennedy, KT
Deckro, RF
Chrissis, JW
Wiley, VD
AF Kennedy, Kevin T.
Deckro, Richard F.
Chrissis, James W.
Wiley, Victor D.
TI On Modeling and Analyzing Multi-Layered Networks
SO MILITARY OPERATIONS RESEARCH
LA English
DT Article
AB Current infrastructure network models often do not directly account for the interdependent nature of infrastructure networks. Infrastructure networks are generally modeled individually, as an isolated network or with minimal recognition of interactions. This paper develops a methodology to model the individual infrastructure network types while explicitly modeling their interconnected effects. The model is built with two sets of variables; the original network variables which model the infrastructure characteristics and an additional set capturing interdependent elements. This formulation may then be decomposed by variable type and solved to optimality using a Benders' Partitioning based solution approach.
C1 [Kennedy, Kevin T.; Wiley, Victor D.] USAF, Wright Patterson AFB, OH 45433 USA.
RP Kennedy, KT (reprint author), USAF, Wright Patterson AFB, OH 45433 USA.
EM kevin.kennedy.4@us.af.mil; Richard.deckro@afit.edu;
james.chrissis@afit.edu; Victor.Wiley@us.af.mil
NR 11
TC 0
Z9 0
U1 0
U2 1
PU MILITARY OPERATIONS RESEARCH SOC
PI ALEXANDRIA
PA 1703 N BEAUREGARD ST, STE 450, ALEXANDRIA, VA 22311-1717 USA
SN 0275-5823
J9 MIL OPER RES
JI Mil. Oper. Res.
PY 2009
VL 14
IS 3
BP 53
EP 66
PG 14
WC Operations Research & Management Science
SC Operations Research & Management Science
GA 541NQ
UT WOS:000273422800003
ER
PT J
AU Warm, JS
Matthews, G
Parasuraman, R
AF Warm, Joel S.
Matthews, Gerald
Parasuraman, Raja
TI Cerebral Hemodynamics and Vigilance Performance
SO MILITARY PSYCHOLOGY
LA English
DT Article
ID NEAR-INFRARED SPECTROSCOPY; SUSTAINED ATTENTION; TASK; WORKLOAD; STRESS;
BRAIN; MODALITY; TIME
AB Five studies are described using transcranial Doppler sonography (TCD) and near-infrared spectroscopy (NIRS) to examine brain systems in vigilance. The results indicate that the vigilance decrement, the temporal decline that typifies vigilance performance, is paralleled by a decline in cerebral blood flow velocity as indexed by TCD. In addition, both measures showed greater activity in the right than in the left cerebral hemisphere in response to a variety of psychophysical challenges, indicating a right hemispheric system in control of vigilance performance. The TCD measure was also found to be potentially useful in selecting observers for vigilance assignments.
C1 [Matthews, Gerald] Univ Cincinnati, Cincinnati, OH USA.
[Parasuraman, Raja] George Mason Univ, Fairfax, VA 22030 USA.
[Warm, Joel S.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Warm, JS (reprint author), USAF, Res Lab, 711 Human Performance Wing RHC,Bldg 248,Room 205,, Wright Patterson AFB, OH 45433 USA.
EM jswarm@fuse.net
NR 49
TC 24
Z9 24
U1 3
U2 7
PU LAWRENCE ERLBAUM ASSOC INC-TAYLOR & FRANCIS
PI PHILADELPHIA
PA 325 CHESTNUT STREET, STE 800, PHILADELPHIA, PA 19106 USA
SN 0899-5605
J9 MIL PSYCHOL
JI Milit. Psychol.
PY 2009
VL 21
BP 75
EP 100
AR PII 908215042
DI 10.1080/08995600802554706
PG 26
WC Psychology, Multidisciplinary
SC Psychology
GA 400IC
UT WOS:000262860300009
ER
PT J
AU Operea-Ilies, GM
Kendall, BS
Cameron, S
Birdsong, G
Stelow, EB
Pambuccian, SE
AF Operea-Ilies, G. M.
Kendall, B. S.
Cameron, S.
Birdsong, G.
Stelow, E. B.
Pambuccian, S. E.
TI Increase in the LSIL/HSIL Ratio over Time: A Reflection of Effective
Screening
SO MODERN PATHOLOGY
LA English
DT Meeting Abstract
CT 98th Annual Meeting of the
United-States-and-Canadian-Academy-of-Pathology
CY MAR 07-13, 2009
CL Boston, MA
SP US & Canadian Acad Pathol
C1 Emory Univ, Grady Mem Hosp, Atlanta, GA 30322 USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
Hennepin Cty Med Ctr, Minneapolis, MN 55415 USA.
Univ Virginia, Charlottesville, VA USA.
Univ Minnesota, Minneapolis, MN 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 0893-3952
J9 MODERN PATHOL
JI Mod. Pathol.
PD JAN
PY 2009
VL 22
MA 404
BP 92A
EP 92A
PG 1
WC Pathology
SC Pathology
GA 393KF
UT WOS:000262371500405
ER
PT S
AU Langley, D
Starman, LA
Coutu, RA
Rogers, S
AF Langley, Derrick
Starman, LaVern A.
Coutu, Ronald A., Jr.
Rogers, Stanley
BE Dickensheets, DL
Schenk, H
Piyawattanametha, W
TI Thermally-actuated micro-shutter for MOEMS applications
SO MOEMS AND MINIATURIZED SYSTEMS VIII
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on MOEMS and Miniaturized Systems VIII
CY JAN 27-28, 2009
CL San Jose, CA
SP SPIE, Texas Instruments Inc, NanoInk Inc, Boston Univ, Photonics Ctr, Ozen Engineering Inc
DE MOEMS; optical shutters; actuators; electrostatics; thermal actuation
AB This paper will investigate a novel thermally actuated micro-shutter design for micro-optical-electro-mechanical system (MOEMS) applications. The use of actuators in optical systems has improved with new developments in micro-electromechanical systems (MEMS) designs for use as components in optical systems. Thermal actuators provide a novel approach to scaling MOEMS to reduce size, weight and power of optical systems. Through the investigation of an aluminum electro-thermal actuator, we developed an in-house fabrication method which operates at less than one volt to aid in reducing the size, weight, and power of the optical system. This paper discusses several challenges and opportunities that may arise from the fabrication of thermally actuated micro-shutter designs which can help improve the actuator's uniformity, reproducibility, and reliability. In addition, we discuss the characterization of the thermal actuator micro-shutter to include mechanical, electrical and optical properties. The "switching" speed of the thermal actuator will also be assessed from a scaling perspective to determine usability.
C1 [Langley, Derrick; Starman, LaVern A.; Coutu, Ronald A., Jr.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Langley, D (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 9
TC 1
Z9 1
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7454-4
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7208
AR 720809
DI 10.1117/12.809776
PG 10
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA BST73
UT WOS:000285753800008
ER
PT J
AU Natarajan, LV
Beckel, ER
Tondiglia, VP
Sutherland, RL
White, TJ
Voss, J
Bunning, TJ
AF Natarajan, L. V.
Beckel, E. R.
Tondiglia, V. P.
Sutherland, R. L.
White, T. J.
Voss, J.
Bunning, T. J.
TI The Effect of Weak Polymer Stabilization on the Switching Properties of
Cholesteric Liquid Crystals
SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Liquid Crystals for Photonics
CY JUL 20-22, 2008
CL Wolfson Coll, Cambridge, ENGLAND
HO Wolfson Coll
DE cholesteric liquid crystal; electro-optical; holographic gratings;
polymer stabilization
ID SWITCHABLE MIRRORS; GELS
AB We examine the differences in electro-optical behavior of weakly polymer stabilized cholesteric liquid crystals (PSCLC) when formed using either a flood lit UV lamp, a flood lit UV laser, or a holographically patterned UV laser. Both samples formed with the UV laser exhibit symmetry in their dynamic electro-optical properties relative to the front and rear surface of the polymerized cell. These cells exhibit a reversible similar to 100 nm blue shift tuning of the notch upon application of a field when the reflectivity is measured from either side. The UV lamp sample exhibits large differences in behavior when examined from the front or back relative to the direction of the polymerizing source. The front surface exhibits tuning of the notch while measurements from the back surface yield only the typical binary switching behavior of a CLC. The overall switching fields in flood lit UV laser and UV laser holographically patterned samples are also considerably lower. These differences are explained due to the presence of a strong polymer gradient across the cell gap in the UV lamp flood lit samples which is not present for the UV laser stabilized samples. We also present novel electro-optical results when these laser cured cells are examined in transmittance mode. Strong anchoring at the two surfaces causes a strong anisotropic local LC structure across the cell gap when a field is applied. The two local environments next to each surface act to strongly pin the CLC structure whereas within the bulk, ample reorientation of the LC molecules occurs. When probed in transmission, unusual fringe patterns which change with the strength of the applied field are observed.
C1 [Natarajan, L. V.; Beckel, E. R.; Tondiglia, V. P.; Sutherland, R. L.; White, T. J.; Voss, J.; Bunning, T. J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Natarajan, LV (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM natarajanl@saic.com
RI White, Timothy/D-4392-2012
NR 8
TC 8
Z9 14
U1 0
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1542-1406
J9 MOL CRYST LIQ CRYST
JI Mol. Cryst. Liquid Cryst.
PY 2009
VL 502
BP 143
EP 153
DI 10.1080/15421400902816363
PG 11
WC Crystallography
SC Crystallography
GA 453RH
UT WOS:000266628100016
ER
PT B
AU Yang, C
Nguyen, T
Venable, D
White, M
Siegel, R
AF Yang, Chun
Nguyen, Thao
Venable, Donald
White, Matthew
Siegel, Rich
GP IEEE
TI Cooperative Position Location with Signals of Opportunity
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
ID NAVIGATION
AB When the reception of GPS signals becomes unreliable, an alternative is to explore signals of opportunity (SOOP) for positioning. Broadcast digital radio transmissions (e.g., digital TV signals) contain field and segment sync codes, which can be used for ranging even though it was not originally designed for so. Another example is the wireless local area network (WLAN) signals. However, there are two major difficulties. Although the location of SOOP sources is known, the number of independent SOOP sources and their geometric distribution may not be favorable for precise positioning. Besides, the clocks of SOOP transmitters are not synchronized, each subject to a different bias and drift. To respond to the 2009 NAECON Grand Challenge, we set forth a cooperative position location approach. The proposed concept makes use of differential ranges between cooperative devices to a common SOOP source, the relative ranges between the cooperative devices, and displacement measurements by the cooperative devices. The cooperation among networked location devices not only allows them to choose the most appropriate positioning mechanism but also provides them with additional measurements to reduce the number of SOOP otherwise required. In addition to data exchange, the radio link between two cooperative devices also allows for estimation of their clock offset. This leads to a joint position location solution via fixed-point smoothing. In this paper, we present the proposed system concept, its subsystems, and their operations and also analyze preliminary simulation results.
C1 [Yang, Chun] Signal Technol Inc, San Mateo, CA 94403 USA.
[Nguyen, Thao; Venable, Donald; White, Matthew] RYRN, Air Force Res Lab, Wright Patterson AFB, OH USA.
[Siegel, Rich] Microwave Innovat, Furlong, PA USA.
RP Yang, C (reprint author), Signal Technol Inc, San Mateo, CA 94403 USA.
EM chunyang@sigtem.com; Thao.Nguyen@wpafb.af.mil;
Donald.Venable@wpafb.af.mil; Matthew.White2@wpafb.af.mil;
rsiegal@mwaveinnov.com
FU [FA8650-09-M-1582]
FX Reasearch supported in part under FA8650-09-M-1582, which is gratefully
acknowledgeded.
NR 20
TC 3
Z9 3
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 18
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400004
ER
PT B
AU Huggins, KR
McGrath, MA
Zheng, YAF
Ewing, RL
AF Huggins, Kevin R.
McGrath, Michael A.
Zheng, Yuan F.
Ewing, Robert L.
GP IEEE
TI Computer Vision Localization Based on Pseudo-Satellites
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB In following the "Signals of Opportunity" theme of the NAECON '09 Grand Challenge, we explore using computer-vision techniques for localization and orientation techniques to complement navigation via the pseudo-satellite technique proposed in [3]. The proposed approach is not affected by the strength of the microwave, and is more accurate than the conventional time of arrival approaches. Methods based on limited and varying information of markers is discussed. Simple applications and experimentation based on augmenting a motorized wheelchair for vision applications is discussed.
C1 [Huggins, Kevin R.; McGrath, Michael A.; Zheng, Yuan F.] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
[Ewing, Robert L.] US Air Force Res Lab, Colorado Springs, CO 80840 USA.
RP Huggins, KR (reprint author), Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 26
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400005
ER
PT B
AU McIntire, JP
Havig, PR
McIntire, LK
AF McIntire, John P.
Havig, Paul R.
McIntire, Lindsey K.
GP IEEE
TI Ideas on Authenticating Humanness in Collaborative Systems Using AI-Hard
Problems in Perception and Cognition
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB Collaborative applications including email, chat, file-sharing networks, blogs, and gaming are under constant threat of automated programs that are gaining access to, attacking, degrading, or otherwise disrupting the intended communications and interactions. Thus, an important issue in collaborative systems security is how to verify that a user is a human, and not a computer attempting to access malicious purposes. We propose and discuss several AI-hard examples from perception and cognition that may be useful for distinguishing between human-level intelligence and artificial intelligence.
C1 [McIntire, John P.; Havig, Paul R.] USAF, Res Lab, 711th HPW RHCV, Wright Patterson AFB, OH 45433 USA.
[McIntire, Lindsey K.] Henry M Jackson Fdn, Adv Mil Med, Rockville, MD USA.
RP McIntire, JP (reprint author), USAF, Res Lab, 711th HPW RHCV, Wright Patterson AFB, OH 45433 USA.
EM john.mcintire@wpafb.af.mil; paul.havig@wpafb.af.mil;
lindsey.mcintire@wpafb.af.mil
NR 19
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 50
EP +
PG 3
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400009
ER
PT B
AU Ewing, RL
Lamont, GB
Kadrovach, BA
Eyster, MD
Talbert, ML
AF Ewing, R. L.
Lamont, G. B.
Kadrovach, B. A.
Eyster, M. D.
Talbert, M. L.
GP IEEE
TI COGNITIVE PROCESSING FOR IMAGE REGISTRATION IN FORMATION FLYING
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB This paper explores the cognitive domains of information, knowledge and intelligence for signal processing. Since the initial cognitive efforts into the field of multi-agent cooperation, research has begun to polarize in several different types of cooperation. The nature of image registration implies information processing that is cognitive in classifying sensory image data. Key functionality presented in this image registration flight control concept development technology roadmap include: image applications of neighborhood and formation algorithms; adaptive wavelet techniques for optimizing imagery transmission and processing; and application of emerging wavelet transformations for adaptive multiscale and multiresolution image applications.
C1 [Ewing, R. L.; Talbert, M. L.] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Ewing, R. L.; Lamont, G. B.; Kadrovach, B. A.; Eyster, M. D.; Talbert, M. L.] Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Ewing, RL (reprint author), USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM robert.ewing@wpafb.af.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 75
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400013
ER
PT B
AU Woodburn, D
Wu, TX
Leland, Q
Rolinski, N
Chow, L
Jordan, B
AF Woodburn, D.
Wu, T. X.
Leland, Q.
Rolinski, N.
Chow, L.
Jordan, B.
GP IEEE
TI Parabolic Approximation to EMA Motion Profiles
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
ID CUBIC-SPLINE INTERPOLATION
AB Parabolic curves fit physical trajectories well because of the inherent smoothness of inertial movement; and, with only a few parameters, they can fit complex paths far more effectively than linear approximations. This paper presents a method using parabolas to approximate the motion profiles to be used in driving an electromechanical aircraft actuator. This method allows the actuator to run longer tests more efficiently. The details of the scheme are explained with emphasis on its matrix manipulation and the fidelity of the approximation to the original, complex profile.
C1 [Woodburn, D.; Wu, T. X.; Chow, L.] Univ Cent Florida, Orlando, FL 32816 USA.
[Leland, Q.; Jordan, B.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Rolinski, N.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Woodburn, D (reprint author), Univ Cent Florida, Orlando, FL 32816 USA.
NR 13
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 97
EP +
PG 3
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400016
ER
PT B
AU Estep, NA
Hurliman, ML
Massman, JP
Pugh, SM
Rathi, RK
Terzuoli, AJ
AF Estep, Nicholas A.
Hurliman, Morgan L.
Massman, Jeffrey P.
Pugh, Steven M.
Rathi, Rashi K.
Terzuoli, Andrew J., Jr.
GP IEEE
TI Low Frequency Antenna Analysis
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB An arbitrary VHF antenna array was considered for the comparison of two methods of analysis. The first method was based on a Fourier transform decomposition of the far-field radiation integral written in Matlab. In this approach the current on the antenna array is taken to be comprised of simplified functions. The current has three rectilinear components with each component been a product of three one dimensional rectilinear functions. The far-field is then obtained by a one dimensional Fourier transform of each of rectilinear function for each of the vector components. The array nature of the antenna is analyzed via a traditional summation approach and represented in closed form. The second method used was a traditional computational electromagnetic simulation using the Numerical Electromagnetic Code (NEC). The Fourier transform method ignores mutual coupling but is very computationally fast. The NEC method fully considers mutually coupling and is computationally much slower.
C1 [Estep, Nicholas A.; Hurliman, Morgan L.; Massman, Jeffrey P.; Pugh, Steven M.; Rathi, Rashi K.; Terzuoli, Andrew J., Jr.] USAF, Inst Technol, Dayton, OH 45433 USA.
RP Estep, NA (reprint author), USAF, Inst Technol, 2950 Hobson Way, Dayton, OH 45433 USA.
EM a.j.terzuoli@ieee.org
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 111
EP 115
PG 5
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400018
ER
PT B
AU Liou, LL
Lin, DM
Tsui, JT
Buck, J
Longbrake, M
McCann, J
Buxa, P
Dalrymple, T
AF Liou, L. L.
Lin, D. M.
Tsui, J. T.
Buck, J.
Longbrake, M.
McCann, J.
Buxa, P.
Dalrymple, T.
GP IEEE
TI Angle of Arrival Measurement Using Wideband Linear Phased Array
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB A radio frequency (RF) signal detection algorithm is developed based on two- dimensional Fast Fourier Transform (FFT) on phased array time series data. The sensitivity is calculated based on two-frame signal detection criterion. A collection system consisting of a linear phased array and multiple wideband digital receivers is utilized. Simulation results are presented based on the system parameters of the channelization frequency plan including the frequency range, LO, mixer, and sampling frequency. Experimental angle of arrival data are processed, and the results are shown to be in good agreement with the simulation results.
C1 [Liou, L. L.; Lin, D. M.; Tsui, J. T.; Buck, J.; Longbrake, M.; McCann, J.; Buxa, P.; Dalrymple, T.] USAF, Res Lab, Sensor Directorate, Wright Patterson AFB, OH 45473 USA.
RP Liou, LL (reprint author), USAF, Res Lab, Sensor Directorate, Bldg 620, Wright Patterson AFB, OH 45473 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 149
EP 155
PG 7
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400025
ER
PT B
AU Sotirelis, P
Wang, T
Butler, J
AF Sotirelis, Paul
Wang, Tiffany
Butler, Jesse
GP IEEE
TI Antenna placement for sensing buried objects by radio frequency lateral
waves
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB In this paper, we investigate radio wave propagation in proximity to a planar air-ground interface for the purpose of analyzing and improving the sensing of objects buried in the ground. We consider non-resonant electrically small electric dipole antennas as well as moderately directional resonant electric dipole antennas, both of which are analyzed in a variety of configurations. The ground is modeled as a uniform dielectric of finite conductivity. Our findings suggest that transmitting from beneath the ground plane can introduce significantly more complex wave propagation in contrast to transmitting from above the ground plane, by allowing the lateral and ground wave to mix. We also find that a directional sensor located just above the ground with the beam steered parallel to the ground interface is a good choice for sensing buried objects at a lateral distance due to the low loss of the lateral wave near the interface.
C1 [Sotirelis, Paul; Wang, Tiffany] USAF, Res Lab, Radar Signal Proc Branch, RF Sensors Div, Wright Patterson AFB, OH 45433 USA.
[Butler, Jesse] Ohio State Univ, Electrosci Lab, Columbus, OH 43210 USA.
RP Sotirelis, P (reprint author), USAF, Res Lab, Radar Signal Proc Branch, RF Sensors Div, Wright Patterson AFB, OH 45433 USA.
EM Paul.Sotirelis@wpafb.af.mil
FU AFRL/RYR; AFRL-OSU Fellowship Program
FX The authors would like to thank an AFRL/RYR Innovative Idea Award, the
Wright Scholar Program, and the AFRL-OSU Fellowship Program for helping
to sponsor this research.
NR 5
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 162
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400027
ER
PT B
AU Fortener, B
Balster, EJ
AF Fortener, Benjamin
Balster, Eric J.
GP IEEE
TI Distortion Weighting Based on Biorthogonal Wavelet Gain in JPEG2000
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB JPEG2000 is the latest standard in image compression with the Joint Photographic Experts Group (JPEG) committee ratifying Part 1, second edition of the standard in September 2004. The JPEG2000 compression system improves upon the original JPEG compression standard through the use of a wavelet transform and an Embedded Block Coding with Optimal Truncation (EBCOT) technique that allows for a compression advantage over JPEG of about 30 percent on average. EBCOT depends on an arithmetic entropy coder called the MQ Coder that processes data and outputs the final image bit-stream that is stored in a JPEG2000 file. After the MQ Coder, the bit-stream can be truncated at points defined during the encoding process, and this truncation may be done optimally to minimize the amount of distortion introduced to the decoded image. This optimal truncation relies on a distortion calculation for every bit that makes up an image. In order to properly calculate this bit-distortion, weights are applied to a squared-error calculation, scaling the resulting distortion in a manner that accounts for the gain associated with the biorthogonal wavelet transform used in JPEG2000. This paper gives a background on the derivation of these weights and where they are applied in the optimal truncation process.
C1 [Fortener, Benjamin; Balster, Eric J.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Fortener, B (reprint author), USAF, Res Lab, Wright Patterson AFB, OH USA.
EM benjamin.fortener.ctr@wpafb.af.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 169
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400029
ER
PT B
AU Repperger, DW
Warm, JS
Havig, PR
Vidulich, MA
Finomore, VS
AF Repperger, D. W.
Warm, J. S.
Havig, P. R.
Vidulich, M. A.
Finomore, V. S.
GP IEEE
TI Modifying Sensitivity/Specificity for Sensors Using Positive and
Negative Predictive Power Measures
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
AB In the collection of data from sensors in the field, the uncertainty in the data may compromise the ability to accurately predict the state of a system. Herein the standard signal detection theory problem is examined when nonstationary effects may occur in the data from the sensors. The use of PPP (positive predictive power) and NPP (negative predictive power) adds a new viewpoint on how to modify sensitivity and specificity measures in decision making involving multiple sensors. This is especially true when stationary properties in received data may be violated.
C1 [Repperger, D. W.; Warm, J. S.; Havig, P. R.; Vidulich, M. A.; Finomore, V. S.] USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Repperger, DW (reprint author), 711 HPW AFRL WPAFB, Dayton, OH USA.
EM d.repperger@ieee.org; Joel.Warm@wpafb.af.mil;
Michael.Vidulich@wpafb.af.mil; Victor.Finomore@wpafb.af.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 190
EP 194
PG 5
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400032
ER
PT B
AU Kahler, B
Blasch, E
AF Kahler, Bart
Blasch, Erik
GP IEEE
TI Target Identification Performance Improvement From Enhanced HRR Radar
Clutter Suppression
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
DE radar; clutter suppression; clutter cancelation; space-time adaptive
processing (STAP); Displaced Phase Center Antenna (DPCA); multi-channel
signal subspace (MSS); automatic target recognition (ATR); High Range
Resolution (HRR); moving target identification
AB Airborne radar tracking in moving ground vehicle scenarios is impacted by sensor, target, and environmental dynamics. Moving targets can be assessed with I-D High Range Resolution (HRR) Radar profiles with sufficient signal-to-noise (SNR) present which contain enough feature information to discern one target from another to help maintain track or to identify the vehicle. Typical radar clutter suppression algorithms developed for processing moving ground target data not only remove the surrounding clutter but also a portion of the target signature. Enhanced clutter suppression can be achieved using a multi-channel signal subspace (MSS) algorithm which preserves target features. In this paper, we exploit extra information from enhanced clutter suppression for automatic target recognition (ATR), present a gain comparison using displaced phase center antenna (DPCA) and MSS clutter suppressed HRR data, and generate confusion-matrix identification results. The results show that more channels for MSS increase ID over DCPA, result in a slightly noisier clutter suppressed image, and presetTe more target features after clutter cancellation
C1 [Kahler, Bart] Gen Dynam Corp, Wright Patterson AFB, OH 45433 USA.
[Blasch, Erik] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Kahler, B (reprint author), Gen Dynam Corp, Wright Patterson AFB, OH 45433 USA.
NR 42
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 205
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400035
ER
PT B
AU Mendoza-Schrock, O
Patrick, JA
Blasch, EP
AF Mendoza-Schrock, Olga
Patrick, James A.
Blasch, Erik P.
GP IEEE
TI Video Image Registration Evaluation for a Layered Sensing Environment
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
DE Image registration; image registration evaluation; layered-sensing
AB In this paper, several methods to register and stabilize a motion imagery video sequence under the layered sensing concept are evaluated. Utilizing the layered sensing paradigm, an area is surveyed by a multitude of sensors at many different altitudes and operating across many modalities. Utilizing a combination of sensors provides better insight into a situation than could ever be achieved with a single sensor. A fundamental requirement in layered sensing is to first register, stabilize, and normalize the data from each of the individual sensors. This paper extends our previous work Ill to include experimental analysis. The paper contribution provides an evaluation of four registration algorithms now including the (I) Lucas-Kanade (LK) algorithm, (2) the Ohio State University (OSU)(1) correlation-based method, (3) robust data alignment (RDA), and (4) Scale Invariant Feature Transform (SIFT). Results demonstrate that registration accuracy and robustness were achieved with the LK and correlation-based methods over the others for image-to-image registration, restricted adaptive tuning, and stabilization over warped images; while the SIFT outperformed the others for partial image overlap.
C1 [Mendoza-Schrock, Olga; Patrick, James A.; Blasch, Erik P.] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mendoza-Schrock, O (reprint author), USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
NR 27
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 223
EP 230
PG 8
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400038
ER
PT B
AU Blasch, E
AF Blasch, Erik
GP IEEE
TI Supervised Learning for Adaptive Interactive Multiple Model (SLAIMM)
Tracking
SO NAECON: PROCEEDINGS OF THE IEEE 2009 NATIONAL AEROSPACE & ELECTRONICS
CONFERENCE
LA English
DT Proceedings Paper
CT IEEE National Aerospace and Electronics Conference
CY JUL 21-23, 2009
CL Dayton, OH
SP IEEE Dayton Sect, IEEE Aerosp & Elect Soc
DE Interactive Multiple Model
AB To improve target tracking algorithms, supervised learning of adaptive interacting multiple model (SLAIMM) is compared to other interacting multiple model (IMM) methods. Based on the classical IMM tracking, a trained adaptive acceleration model is added to the filter bank to track behavior between the fixed model dynamics. The results show that the SLAIMM algorithm 1) improves kinematic track accuracy for a target undergoing acceleration, 2) affords track maintenance through maneuvers, and 3) reduces computational costs by performing off-line learning of system parameters. The SLAIMM method is compared with the classical IMM, the Munir Adaptive IMM, and the Maybeck Moving-Bank multiple-model adaptive estimator (MBMMAE).
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Blasch, E (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 34
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4494-6
PY 2009
BP 236
EP 243
PG 8
WC Engineering, Aerospace
SC Engineering
GA BPK73
UT WOS:000279101400040
ER
PT J
AU Amama, PB
Pint, CL
McJilton, L
Kim, SM
Stach, EA
Murray, PT
Hauge, RH
Maruyama, B
AF Amama, Placidus B.
Pint, Cary L.
McJilton, Laura
Kim, Seung Min
Stach, Eric A.
Murray, P. Terry
Hauge, Robert H.
Maruyama, Benji
TI Role of Water in Super Growth of Single-Walled Carbon Nanotube Carpets
SO NANO LETTERS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; CATALYST; FILMS
AB The Ostwald ripening behavior of Fe catalyst films deposited on thin alumina supporting layers is demonstrated as a function of thermal annealing in H(2) and H(2)/H(2)O. The addition of H(2)O in super growth of single-walled carbon nanotube carpets is observed to inhibit Ostwald ripening due to the ability of oxygen and hydroxyl species to reduce diffusion rates of catalyst atoms. This work shows the impact of typical carpet growth environments on catalyst film evolution and the role Ostwald ripening may play in the termination of carpet growth.
C1 [Amama, Placidus B.; Maruyama, Benji] USAF, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
[Pint, Cary L.] Rice Univ, Dept Phys & Astron, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA.
[McJilton, Laura; Hauge, Robert H.] Rice Univ, Dept Chem, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA.
[Amama, Placidus B.] Universal Technol Corp, Dayton, OH 45432 USA.
[Kim, Seung Min; Stach, Eric A.] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA.
[Kim, Seung Min; Stach, Eric A.] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
[Murray, P. Terry] Univ Dayton, UDRI, Dayton, OH 45469 USA.
RP Maruyama, B (reprint author), USAF, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
EM Benji.Maruyama@wpafb.af.mil
RI Pint, Cary/C-5053-2009; Hauge, Robert/A-7008-2011; Maruyama,
Benji/E-3634-2010; Stach, Eric/D-8545-2011; Pint, Cary/I-6785-2013
OI Hauge, Robert/0000-0002-3656-0152; Stach, Eric/0000-0002-3366-2153;
FU Air Force Office of Scientific Research (AFOSR); Army Research Office
(ARO)
FX This work was funded by the Air Force Office of Scientific Research
(AFOSR). S.M.K. and E.A.S. gratefully acknowledge support from the Army
Research Office (ARO).
NR 23
TC 195
Z9 196
U1 2
U2 86
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD JAN
PY 2009
VL 9
IS 1
BP 44
EP 49
DI 10.1021/nl801876h
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 395IZ
UT WOS:000262519100008
PM 19046079
ER
PT S
AU Ouchen, F
Yaney, PP
Grote, JG
AF Ouchen, Fahima
Yaney, Perry P.
Grote, James G.
BE Kobayashi, N
Ouchen, F
Rau, I
TI DNA thin films as semiconductors for BioFET
SO NANOBIOSYSTEMS: PROCESSING, CHARACTERIZATION, AND APPLICATIONS II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Nanobiosystems - Processing, Characterization, and
Applications II
CY AUG 05-06, 2009
CL San Diego, CA
SP SPIE
DE Biopolymers; DNA-CTMA; PEDOT-PSS; PCBM; Platinum; Pt; PMMA; APC and
BiOFETs
ID TRANSISTORS; POLYMERS
AB In this paper we report the latest results on DNA based field effect transistor. Blending DNA with either conductive polymers, carbon based nanoparticles or metal based compound show an increase in surface conductivity and evidence of a field effect modulation of the drain-source currents
C1 [Ouchen, Fahima; Yaney, Perry P.; Grote, James G.] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ouchen, F (reprint author), USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 15
TC 4
Z9 4
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7693-7
J9 PROC SPIE
PY 2009
VL 7403
AR 74030F
DI 10.1117/12.831234
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Biomaterials; Optics;
Physics, Applied; Physics, Condensed Matter
SC Science & Technology - Other Topics; Materials Science; Optics; Physics
GA BUN67
UT WOS:000289839400009
ER
PT J
AU Simoes, R
Silva, J
Vaia, R
Sencadas, V
Costa, P
Gomes, J
Lanceros-Mendez, S
AF Simoes, Ricardo
Silva, Jaime
Vaia, Richard
Sencadas, Vitor
Costa, Pedro
Gomes, Joao
Lanceros-Mendez, Senentxu
TI Low percolation transitions in carbon nanotube networks dispersed in a
polymer matrix: dielectric properties, simulations and experiments
SO NANOTECHNOLOGY
LA English
DT Article
ID METAL-LOADED DIELECTRICS; CAPACITANCE EXTRACTION; BREAKDOWN; COMPOSITES;
NANOCOMPOSITES; POLYCARBONATE; CONDUCTIVITY; PARTICLES; CONSTANT;
BEHAVIOR
AB The low concentration behaviour and the increase of the dielectric constant in carbon nanotubes/polymer nanocomposites near the percolation threshold are still not well understood. In this work, a numerical model has been developed which focuses on the effect of the inclusion of conductive fillers in a dielectric polymer matrix on the dielectric constant and the dielectric strength. Experiments have been carried out in carbon nanotubes/poly(vinylidene fluoride) nanocomposites in order to compare to the simulation results. This work shows how the critical concentration is related to the formation of capacitor networks and that these networks give rise to high variations in the electrical properties of the composites. Based on numerical studies, the dependence of the percolation transition on the preparation of the nanocomposite is discussed. Finally, based on numerical and experimental results, both ours and from other authors, the causes of anomalous percolation behaviour of the dielectric constant are identified.
C1 [Simoes, Ricardo; Silva, Jaime] Univ Minho, IPC, P-4800058 Guimaraes, Portugal.
[Simoes, Ricardo] Polytech Inst Cavado & Ave, Sch Technol, P-4750 Barcelos, Portugal.
[Silva, Jaime; Sencadas, Vitor; Costa, Pedro; Gomes, Joao; Lanceros-Mendez, Senentxu] Univ Minho, Dept Phys, P-4710057 Braga, Portugal.
[Vaia, Richard] USAF, Res Labs, Wright Patterson AFB, OH 45433 USA.
[Gomes, Joao] CeNTI Ctr Nanotechnol & Smart Mat, P-4760034 Vila Nova De Famalicao, Portugal.
RP Simoes, R (reprint author), Univ Minho, IPC, Campus Azurem, P-4800058 Guimaraes, Portugal.
EM rsimoes@dep.uminho.pt; lanceros@fisica.uminho.pt
RI Simoes, Ricardo/C-4120-2011; Silva, Jaime/B-5891-2009; lanceros-mendez,
senentxu/A-1730-2011; Simoes, Ricardo/J-7033-2013; Sencadas,
Vitor/A-3932-2008;
OI Silva, Jaime/0000-0002-1520-0799; lanceros-mendez,
senentxu/0000-0001-6791-7620; Simoes, Ricardo/0000-0002-3097-8849;
Sencadas, Vitor/0000-0003-1986-1348; Costa, Pedro/0000-0001-9887-0925
FU Air Force Office of Scientific Research; Air Force Material Command;
USAF [FA8655-06-1-3009]; [POCI/CTM/59425/2004]; [PTDC/CTM/69362/2006];
[SFRH/BD/16543/2004]
FX This effort was sponsored by the Air Force Office of Scientific
Research, Air Force Material Command, USAF, under grant number
FA8655-06-1-3009. The US Government is authorized to reproduce and
distribute reprints for Governmental purpose notwithstanding any
copyright notation thereon. We acknowledge also the Foundation for
Science and Technology, Lisbon, through the 3. Quadro Comunitario de
Apoio, and the POCTI and FEDER programmes. The authors wish to thank
Solvay and Bayer Materials Science for the excellent material provided
and FCT for financial support through POCI/CTM/59425/2004,
PTDC/CTM/69362/2006 and SFRH/BD/16543/2004 (VS).
NR 38
TC 61
Z9 62
U1 1
U2 31
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD JAN
PY 2009
VL 20
IS 3
AR 035703
DI 10.1088/0957-4484/20/3/035703
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 385EF
UT WOS:000261795500019
PM 19417305
ER
PT J
AU Knopp, JS
Aldrin, JC
Jata, KV
AF Knopp, Jeremy S.
Aldrin, John C.
Jata, Kumar V.
TI Computational methods in eddy current crack detection at fastener sites
in multi-layer structures
SO NONDESTRUCTIVE TESTING AND EVALUATION
LA English
DT Article
DE eddy current; cracks; modelling; feature extraction; parameter
estimation
ID CURRENT INSPECTION; INSTALLED FASTENERS; AEROSPACE APPLICATIONS;
AIRCRAFT STRUCTURES; CURRENT INVERSION; FATIGUE CRACKS; CURRENT PROBES;
RECONSTRUCTION; SIGNALS; HOLES
AB Reliable detection of both surface and subsurface cracks around fastener sites continues to be a need for maintaining ageing aircraft structures. In this work, a comprehensive overview of both experimental and modelling work addressing eddy current crack detection around fastener holes in multi-layer structures is presented. This overview consists of a strategy for the application of computational methods along with case studies that demonstrate the role of modelling for this particular class of problems. The state-of-the-art on eddy current modelling applicable to low-frequency eddy current problems is reviewed. The role of modelling in feature extraction algorithm development, crack characterisation, and probability of detection evaluation is highlighted.
C1 [Knopp, Jeremy S.; Jata, Kumar V.] USAF, AFRL RXLP, Res Lab, Met Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA.
[Aldrin, John C.] Computat Tools, Gurnee, IL 60031 USA.
RP Knopp, JS (reprint author), USAF, AFRL RXLP, Res Lab, Met Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA.
EM Jeremy.knopp@wpafb.af.mil
FU Air Force Office of Scientific Research
FX The authors would like to acknowledge support for this study provided by
Air Force Office of Scientific Research. The authors thank Harold
Sabbagh, Elias Sabbagh and R. Kim Murphy for support with VIC-3D(R) and
Eric Lindgren, Mark Blodgett and Tom Moran for their valuable
discussions.
NR 58
TC 15
Z9 15
U1 1
U2 7
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1058-9759
J9 NONDESTRUCT TEST EVA
JI Nondestruct. Test. Eval.
PY 2009
VL 24
IS 1-2
BP 103
EP 120
AR PII 904846274
DI 10.1080/10589750802195519
PG 18
WC Materials Science, Characterization & Testing
SC Materials Science
GA 387AG
UT WOS:000261923500008
ER
PT J
AU Abu-Nabah, BA
Yu, F
Hassan, WT
Blodgett, MP
Nagy, PB
AF Abu-Nabah, Bassam A.
Yu, Feng
Hassan, Waled T.
Blodgett, Mark P.
Nagy, Peter B.
TI Eddy current residual stress profiling in surface-treated engine alloys
SO NONDESTRUCTIVE TESTING AND EVALUATION
LA English
DT Article
DE eddy current; spectroscopy; surface-treatment; residual stress profiling
ID NICKEL-BASE SUPERALLOYS; CURRENT CONDUCTIVITY SPECTROSCOPY; CURRENT
NONDESTRUCTIVE INSPECTION; SPIRAL COILS; MANGANIN; METALS; ROUGHNESS;
GAUGE
AB Recent research results indicate that eddy current conductivity measurements can be exploited for nondestructive evaluation of subsurface residual stresses in surface-treated nickel-base superalloy components. According to this approach, the depth-dependent electric conductivity profile is calculated from the measured frequency-dependent apparent eddy current conductivity spectrum. Then, the residual stress depth profile is calculated from the conductivity profile based on the piezoresistivity coefficient of the material, which is determined separately from calibration measurements using the known external applied stresses. This paper reviews the basic principles, measurement procedures, advantages, and limitations of eddy current residual stress profiling.
C1 [Abu-Nabah, Bassam A.; Yu, Feng; Nagy, Peter B.] Univ Cincinnati, Dept Aerosp Engn, Cincinnati, OH 45221 USA.
[Hassan, Waled T.] Honeywell Aerosp, Phoenix, AZ 85034 USA.
[Blodgett, Mark P.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Nagy, PB (reprint author), Univ Cincinnati, Dept Aerosp Engn, Cincinnati, OH 45221 USA.
EM peter.nagy@uc.edu
RI Nagy, Peter/O-5404-2016
OI Nagy, Peter/0000-0001-5715-2409
FU Air Force Research Laboratory [F33615-03-2-5210, FA 8650-04-C-5228];
University of Cincinnati; Quantitative Inspection Technology for Aging
Military Aircraft program with Iowa State University [5007-IOWA-001];
Center for NDE at Iowa State University; [F09650-00-D-0018]
FX This work was supported by the Air Force Research Laboratory partly
under Contract No. F33615-03-2-5210 with the University of Cincinnati
and partly through the Quantitative Inspection Technology for Aging
Military Aircraft program with Iowa State University on delivery order
number 5007-IOWA-001 of the prime contract F09650-00-D-0018. Additional
support was provided through cooperation with the Center for NDE at Iowa
State University with funding from the Air Force Research Laboratory on
contract FA 8650-04-C-5228. The diffraction measurements reported in
this study were made by Lambda Research of Cincinnati. The authors would
like to acknowledge valuable discussions and ongoing collaboration with
Susanne Hillmann and Norbert Meyendorf of the Fraunhofer Institute for
NDT in Dresden, Germany.
NR 39
TC 17
Z9 18
U1 3
U2 7
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1058-9759
J9 NONDESTRUCT TEST EVA
JI Nondestruct. Test. Eval.
PY 2009
VL 24
IS 1-2
BP 209
EP 232
AR PII 904846103
DI 10.1080/10589750802245280
PG 24
WC Materials Science, Characterization & Testing
SC Materials Science
GA 387AG
UT WOS:000261923500014
ER
PT S
AU Gonzalez, LP
Upchurch, D
Barnes, JO
Schunemann, PG
Zawilski, K
Guha, S
AF Gonzalez, Leonel P.
Upchurch, Derek
Barnes, Jacob O.
Schunemann, Peter G.
Zawilski, Kevin
Guha, Shekhar
BE Powers, PE
TI Second Harmonic Generation in CdSiP(2)
SO NONLINEAR FREQUENCY GENERATION AND CONVERSION: MATERIALS, DEVICES, AND
APPLICATIONS VIII
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Nonlinear Frequency Generation and Conversion - Materials,
Devices, and Applications VIII
CY JAN 27-29, 2009
CL San Jose, CA
SP SPIE
DE Nonlinear Optics; Second Harmonic Generation; Infrared; Materials
AB A new nonlinear optical crystal, CdSiP(2), has recently been developed and a bulk crystal cut for phase-matching of second harmonic generation from 4.8 to 2.4 mu m has been tested. Numerical and theoretical results are presented. Accounting for Fresnel losses, internal conversion efficiency was over 55% at a peak incident irradiance of 56 MW/cm(2).
C1 [Gonzalez, Leonel P.; Upchurch, Derek; Barnes, Jacob O.; Guha, Shekhar] USAF, Res Lab, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
RP Gonzalez, LP (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
EM leo.gonzalez@gdit.com; peter.g.schunemann@baesystems.com;
shekhar.guha@wpafb.af.mil
NR 5
TC 5
Z9 5
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7443-8
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7197
AR 71970N
DI 10.1117/12.808904
PG 6
WC Optics; Physics, Applied; Physics, Condensed Matter
SC Optics; Physics
GA BSO22
UT WOS:000285085500018
ER
PT S
AU Peterson, RD
Whelan, D
Bliss, D
Lynch, C
AF Peterson, Rita D.
Whelan, David
Bliss, David
Lynch, Candace
BE Powers, PE
TI Improved material quality and OPO performance in orientation-patterned
GaAs
SO NONLINEAR FREQUENCY GENERATION AND CONVERSION: MATERIALS, DEVICES, AND
APPLICATIONS VIII
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Nonlinear Frequency Generation and Conversion - Materials,
Devices, and Applications VIII
CY JAN 27-29, 2009
CL San Jose, CA
SP SPIE
DE orientation-patterning; quasi-phase-matching; GaAs epitaxy; nonlinear
optical frequency conversion; optical parametric amplification
ID THICK
AB The U. S. Air Force is developing orientation-patterned GaAs (OPGaAs) for nonlinear frequency conversion in the 2-5 mu m and 8-12 mu m regions. We report recent progress in OPO device performance which reflects continued improvement in material quality. Seven new OPGaAs samples, representing four distinct growth regimes, were evaluated in terms of threshold, slope efficiency, and output spectral content using a Q-switched Tm,Ho:YLF laser operating at 2 mu m as the pump source. The samples were identical in base template, grating period, length, and AR coating, permitting direct comparison of results to identify favorable growth conditions. As anticipated, performance varied significantly among the sample set, with slope efficiencies from 12% to 35% and thresholds from 9 mu J to 40 mu J. Less anticipated was the low level of uniformity across each sample and between samples grown in the same growth run. Significant variations in slope efficiency and threshold were not uncommon. Still, most of the samples performed manifestly better than previously grown material, indicating an overall improvement in OPGaAs quality. Research continues on understanding growth processes, optical loss mechanisms, and how these translate into device performance.
C1 [Peterson, Rita D.; Whelan, David] USAF, Res Lab, AFRL RYJW, Wright Patterson AFB, OH 45433 USA.
RP Peterson, RD (reprint author), USAF, Res Lab, AFRL RYJW, Wright Patterson AFB, OH 45433 USA.
NR 4
TC 2
Z9 2
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7443-8
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7197
AR 719709
DI 10.1117/12.812969
PG 8
WC Optics; Physics, Applied; Physics, Condensed Matter
SC Optics; Physics
GA BSO22
UT WOS:000285085500007
ER
PT S
AU Schepler, KL
Spring, JB
AF Schepler, Kenneth L.
Spring, Justin B.
BE Powers, PE
TI Calculation of quasi phasematching in optical parametric GaAs/AlGaAs
waveguides
SO NONLINEAR FREQUENCY GENERATION AND CONVERSION: MATERIALS, DEVICES, AND
APPLICATIONS VIII
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Nonlinear Frequency Generation and Conversion - Materials,
Devices, and Applications VIII
CY JAN 27-29, 2009
CL San Jose, CA
SP SPIE
DE quasi phasematching; gallium arsenide; waveguide; nonlinear frequency
conversion; infrared
ID 2ND-HARMONIC GENERATION; GAAS; CONVERSION
AB Quasi phasematched domain periods for bulk and waveguide GaAs nonlinear frequency conversion were calculated. Waveguide beam confinement resulted in a decrease in effective refractive index and the magnitude of this index change was found to increase supralinearly with wavelength. Domain periodicity required for a 2.056-mu m pumped, 10x10 mu m(2) GaAs core, Al(0.5)Ga(0.5)As cladding waveguide OPO at degeneracy decreased from 60.4 mu m for bulk GaAs to 57.9 mu m for a rib waveguide and 49.8 mu m for a buried waveguide in a GaAs OPO. Careful accounting for waveguide effects is necessary to fabricate a periodic waveguide structure with the desired function.
C1 [Schepler, Kenneth L.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Schepler, KL (reprint author), USAF, Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM Kenneth.Schepler@WPAFB.AF.mil
OI Schepler, Kenneth/0000-0001-9658-2305
NR 10
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7443-8
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7197
AR 719708
DI 10.1117/12.808035
PG 7
WC Optics; Physics, Applied; Physics, Condensed Matter
SC Optics; Physics
GA BSO22
UT WOS:000285085500006
ER
PT J
AU Brown, FM
AF Brown, Frank Markham
TI George Boole's Deductive System
SO NOTRE DAME JOURNAL OF FORMAL LOGIC
LA English
DT Article
DE Boole; 19th century; Boolean algebra; Boolean equations
AB The deductive system in Boole's Laws of Thought (LT) involves both an algebra, which we call proto-Boolean, and a "general method in Logic" making use of that algebra. Our object is to elucidate these two components of Boole's system, to prove his principal results, and to draw some conclusions not explicit in LT. We also discuss some examples of incoherence in LT; these mask the genius of Boole's design and account for much of the puzzled and disparaging commentary LT has received. Our evaluation of Boole's logical system does not differ substantially from that advanced in Hailperin's exhaustive study, Boole's Logic and Probability. Unlike the latter work, however, we make direct use of the polynomials native to LT rather than appealing to formalisms such as multisets and rings.
C1 [Brown, Frank Markham] USAF, Inst Technol, Dayton, OH 45433 USA.
RP Brown, FM (reprint author), 86 Shoreline Dr, Hilton Head Isl, SC 29928 USA.
EM FMBrown@1953.USNA.com
NR 60
TC 2
Z9 2
U1 0
U2 3
PU DUKE UNIV PRESS
PI DURHAM
PA 905 W MAIN ST, STE 18-B, DURHAM, NC 27701 USA
SN 0029-4527
J9 NOTRE DAME J FORM L
JI Notre Dame J. Form. Log.
PY 2009
VL 50
IS 3
BP 303
EP 330
DI 10.1215/00294527-2009-013
PG 28
WC Mathematics; Logic; Philosophy
SC Mathematics; Science & Technology - Other Topics; Philosophy
GA 613SV
UT WOS:000279001800005
ER
PT J
AU Witkop, CT
Neale, D
Wilson, LM
Bass, EB
Nicholson, WK
AF Witkop, Catherine Takacs
Neale, Donna
Wilson, Lisa M.
Bass, Eric B.
Nicholson, Wanda K.
TI Active Compared With Expectant Delivery Management in Women With
Gestational Diabetes A Systematic Review
SO OBSTETRICS AND GYNECOLOGY
LA English
DT Review
ID SHOULDER DYSTOCIA; PREGNANCY; PREVALENCE; INDUCTION; MELLITUS; QUALITY;
LABOR
AB OBJECTIVE: We conducted a systematic review to estimate benefits and harms of the choice of timing of induction or elective cesarean delivery based on estimated fetal weight or gestational age in women with gestational diabetes mellitus (GDM).
DATA SOURCES: An electronic literature search was performed using MEDLINE, EMBASE, the Cumulative Index to Nursing and Allied Health Literature, and The Cochrane Central Register of Controlled Trials from inception to January 2007.
METHODS OF STUDY SELECTION: Two investigators independently reviewed titles and abstracts, assessed article quality, and abstracted data. Maternal outcomes included cesarean delivery and operative vaginal delivery. Neonatal outcomes included birth weight macrosomia, large for gestational age, shoulder dystocia, birth trauma, neonatal intensive care admissions, and perinatal mortality.
TABULATION, INTEGRATION, AND RESULTS: Five studies met our inclusion criteria: one randomized controlled trial (RCT) and four observational studies. The RCT (n=200) compared the effect of labor induction at term with expectant management. The proportion of newborns with birth weight greater than the 90th percentile was significantly greater in the expectant-management group (23% compared with 10% with active induction, P=.02); there were no significant differences in rates of cesarean delivery, shoulder dystocia, neonatal hypoglycemia, or perinatal deaths. The four observational studies suggest a potential reduction in macrosomia and shoulder dystocia with labor induction and cesarean delivery for estimated fetal weight indications, but there was insufficient evidence to assess other clinical outcomes.
CONCLUSION: Active rather than expectant management of labor at term for women with GDM may reduce rates of macrosomia and related complications. Further RCTs and observational studies with a broader range of outcomes are needed for sufficient evidence to inform clinical practice.
C1 Johns Hopkins Bloomberg Sch Publ Hlth, Dept Gen Prevent Med & Populat, Baltimore, MD USA.
Johns Hopkins Bloomberg Sch Publ Hlth, Dept Family & Reprod Hlth, Baltimore, MD USA.
Johns Hopkins Sch Med, Dept Obstet & Gynecol, Baltimore, MD USA.
Johns Hopkins Sch Med, Dept Med, Baltimore, MD USA.
Johns Hopkins Evidence Based Practice Ctr, Baltimore, MD USA.
RP Witkop, CT (reprint author), USAF Acad, 10 AMDS SGPF,2355 Fac Dr,Rm 2N286,USAFA, Colorado Springs, CO 80840 USA.
EM katika@aya.yale.edu
NR 15
TC 29
Z9 30
U1 1
U2 10
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0029-7844
J9 OBSTET GYNECOL
JI Obstet. Gynecol.
PD JAN
PY 2009
VL 113
IS 1
BP 206
EP 217
PG 12
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA 388KG
UT WOS:000262018100026
PM 19104376
ER
PT S
AU Massey, SM
Spring, JB
Russell, TH
AF Massey, Steven M.
Spring, Justin B.
Russell, Timothy H.
BE Jiang, S
Digonnet, MJF
Glesener, JW
Dries, JC
TI Continuous wave stimulated Brillouin scattering phase conjugation and
beam cleanup in optical fiber
SO OPTICAL COMPONENTS AND MATERIALS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical Components and Materials VI
CY JAN 26-28, 2009
CL San Jose, CA
SP SPIE
DE Brillouin scattering; SBS; nonlinear optics; phase conjugation; beam
cleanup; fiber optics
ID OSCILLATOR-POWER-AMPLIFIER; LASER; THRESHOLD; MIRROR; PULSES; CAVITY
AB A review of research into stimulated Brillouin scattering (SBS) phase conjugation and beam cleanup conducted at the Air Force Institute of Technology is presented. CW phase conjugation was demonstrated using SBS in short lengths of multi-mode, step-index fiber. A fidelity of 0.8 was achieved using a 0.06-NA fiber of 40 m length and a 0.13-NA fiber at 15 m length. In modeling and experiment, the fidelity declined as fiber length or numerical aperture increased. A relationship was established empirically between step-index fiber parameters and the phase conjugation fidelity. In addition, increased fidelity was related to an increase in the effective Brillouin gain coefficient in step-index fibers. Beam cleanup was observed in both graded-index and step-index fibers. The Stokes beam generated in long, multimode, graded-index fibers was analyzed using spatial and phase methods and found to be a low-order mode of the fiber instead of a phase conjugate of the pump. SBS in long, graded-index fibers was used to combine multiple beams and to improve the beam quality of a single aberrated beam.
C1 [Massey, Steven M.] USAF, Res Lab, Kirtland AFB, NM 87117 USA.
RP Massey, SM (reprint author), USAF, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM afrl/rdsworkfloworgmailbox@kirtland.af.mil
NR 41
TC 1
Z9 1
U1 2
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7458-2
J9 PROC SPIE
PY 2009
VL 7212
AR 72120A
DI 10.1117/12.812325
PG 12
WC Optics; Physics, Applied
SC Optics; Physics
GA BSQ18
UT WOS:000285376300008
ER
PT S
AU Oliver, JW
Pocock, G
Vincelette, R
Kumru, S
Noojin, GD
Schuster, KJ
Stolarski, D
Shingledecker, A
Rockwell, BA
AF Oliver, Jeffrey W.
Pocock, Ginger
Vincelette, Rebecca
Kumru, Semih
Noojin, Gary D.
Schuster, Kurt J.
Stolarski, David
Shingledecker, Aurora
Rockwell, Benjamin A.
BE Jacques, SL
Jansen, ED
Roach, WP
TI In vivo investigation of near infrared retinal lesions utilizing two
adaptive optics enhanced imaging modalities
SO OPTICAL INTERACTIONS WITH TISSUE AND CELLS XX
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Optical Interactions with Tissue and Cells XX
CY JAN 26-28, 2009
CL San Jose, CA
SP SPIE, Air Force Off Sci Res
DE Adaptive Optics; MVL; NIR; laser threshold; in vivo imaging; confocal;
scanning laser ophthalmoscope; SLO; Spectral Domain; OCT
AB Near threshold retinal lesions were created in the eyes of non-human primate (NHP) subjects in the near infrared (NIR) wavelength range of 1100 to 1319 nm, with 80 to 100 ms laser exposures. Two new in vivo imagining techniques, Adaptive Optic enhanced-Spectral Domain Optical Coherence Tomography (AO-SDOCT) and Adaptive Optic enhanced confocal Scanning Laser Ophthalmoscope imagery (AOcSLO) were utilized to pinpoint areas of chronic damage within the retinal layers resulting from laser exposure. Advantages and limitations of each technology with regard to the study of laser retinal tissue interaction are highlighted.
C1 [Oliver, Jeffrey W.; Pocock, Ginger; Vincelette, Rebecca; Kumru, Semih; Rockwell, Benjamin A.] USAF, Res Lab, Brooks City Base, TX 78235 USA.
RP Oliver, JW (reprint author), USAF, Res Lab, AFRL 711 HPW RHDO,2624 Louis Bauer Dr, Brooks City Base, TX 78235 USA.
NR 9
TC 1
Z9 1
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7421-6
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7175
AR 71750H
DI 10.1117/12.807825
PG 9
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA BSS69
UT WOS:000285714500012
ER
PT S
AU Rockwell, BA
Vincelette, R
Oliver, JW
Kumru, S
Noojin, GD
Schuster, KJ
Stolarski, D
Shingledecker, A
Clark, CD
Wooddell, D
Thomas, R
AF Rockwell, Benjamin A.
Vincelette, Rebecca
Oliver, Jeffrey W.
Kumru, Semih
Noojin, Gary D.
Schuster, Kurt J.
Stolarski, David
Shingledecker, Aurora
Clark, C. D.
Wooddell, David
Thomas, Robert
BE Jacques, SL
Jansen, ED
Roach, WP
TI Limiting Mechanism for NIR Laser Retinal Damage
SO OPTICAL INTERACTIONS WITH TISSUE AND CELLS XX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical Interactions with Tissue and Cells XX
CY JAN 26-28, 2009
CL San Jose, CA
SP SPIE, Air Force Off Sci Res
DE Retinal Lesion; MVL; NIR; laser threshold; in vivo imaging
ID REGION; IR
AB Near-infrared (NIR) laser exposures to the retina are affected by intraocular absorption, chromatic aberration and retinal absorption. We present the latest results of retinal exposure to wavelengths between 1.0 to 1.319 micrometers and show how the trends for long-pulse exposure are dramatically affected by intraocular absorption in the anterior portion of the eye.
C1 [Rockwell, Benjamin A.; Vincelette, Rebecca; Oliver, Jeffrey W.; Kumru, Semih; Wooddell, David; Thomas, Robert] USAF, Res Lab, Brooks City Base, TX 78235 USA.
RP Rockwell, BA (reprint author), USAF, Res Lab, AFRL 711 HPW RHDO,2624 Louis Bauer Dr, Brooks City Base, TX 78235 USA.
EM benjamin.rockwell@us.af.mil
NR 6
TC 1
Z9 2
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7421-6
J9 PROC SPIE
PY 2009
VL 7175
AR 71750J
DI 10.1117/12.807710
PG 5
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA BSS69
UT WOS:000285714500014
ER
PT J
AU Chang, JCC
Yang, ZP
Huang, DH
Cardimona, DA
Lin, SY
AF Chang, John Chun-Chieh
Yang, Zu-Po
Huang, Danhong
Cardimona, D. A.
Lin, Shawn-Yu
TI Strong light concentration at the subwavelength scale by a metallic
hole-array structure
SO OPTICS LETTERS
LA English
DT Article
ID PLASMON-ENHANCED TRANSMISSION; OPTICAL-TRANSMISSION
AB A metallic two-dimensional hole-array (2DHA) sample is successfully fabricated and its transmission property measured at mid-infrared wavelengths (lambda similar to 1.5-20 mu m). At the plasmonic resonance, the 2DHA sample exhibits a normal incidence transmittance of 80% at lambda = 7.6 mu m. This corresponds to more than twice as much light that is transmitted as it impinges directly on the holes at the maxima of transmittance. This exceedingly large enhancement is attributed to a strong plasmonic resonance and an effective light concentration through an ultrathin metal film of 50 nm. This advancement will pave the way to a much enhanced infrared detection using a simple and compact 2DHA architecture. (c) 2008 Optical Society of America OCIS codes: 240.6680, 350.4238.
C1 [Chang, John Chun-Chieh; Yang, Zu-Po; Lin, Shawn-Yu] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA.
[Huang, Danhong; Cardimona, D. A.] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Lin, SY (reprint author), Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA.
EM sylin@rpi.edu
FU U.S. Air Force Office of Scientific Research (AFOSR) [FA95500610431]
FX S. Y. Lin acknowledges financial support from the U.S. Air Force Office
of Scientific Research (AFOSR) under contract FA95500610431.
NR 9
TC 12
Z9 12
U1 0
U2 0
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD JAN 1
PY 2009
VL 34
IS 1
BP 106
EP 108
PG 3
WC Optics
SC Optics
GA 400SQ
UT WOS:000262889300036
PM 19241633
ER
PT S
AU DeLima, P
Pack, D
AF DeLima, Pedro
Pack, Daniel
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI Maximizing Search Coverage Using Future Path Projection for Cooperative
Multiple UAVs with Limited Communication Ranges
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon
DE cooperative; unmanned aerial vehicles; limited communication; future
path projection
ID SYSTEMS
AB In this chapter, we present Future Path Projection (FPP) as a novel method for multiple Unmanned Aerial Vehicles (UAVs) with limited communication ranges to cooperatively maximize the coverage of a large search area. For multiple cooperative UAVs to perform an effective search mission, the critical status and sensor information collected by each UAV must be shared with all other UAVs in the group. In an ideal environment where there is no communication limitation, all involved UAVs can share the necessary information without any constraints. In a more realistic environment, UAVs must deal with limited communication ranges. The communication range limitation, however, introduces a challenging problem for multiple UAVs to effectively cooperate. In the proposed method, each UAV Constructs an individual probability distribution map of the search space which reflects predictions of the future paths of UAVs as they move beyond their communication ranges. The probability distribution map describes the likelihood of detecting targets within the search space. The overall, collective UAV search patterns are governed by decisions made by each UAV within the group, based on each individual probability distribution map. We show that the collective search patterns generated by cooperative UAVs using the proposed method significantly improve the search area, coverage when compared to similar search patterns produced by other mitigation strategies designed to overcome the communication range limitation. We validate the effectiveness of the proposed path projection method using simulation results.
C1 [DeLima, Pedro; Pack, Daniel] USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
RP DeLima, P (reprint author), USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
EM pedro.lima@usafa.edu; daniel.pack@usafa.edu
NR 12
TC 1
Z9 2
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 103
EP 117
PG 15
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800006
ER
PT S
AU Bode, J
Jacques, D
Pachter, M
AF Bode, John, II
Jacques, David
Pachter, Meir
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI Optimal Control of the Weapon Operating Characteristic with Control
Inequality Constraints
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon Inc
ID WIDE-AREA-SEARCH
AB Optimal employment of autonomous wide area search munitions or unmanned aerial vehicles is considered. The air vehicle searches a battle space for stationary targets in the presence of false targets and/or clutter. A control problem is formulated to achieve optimal scheduling of the control variables P(TR), the probability of target report, which is a reflection of the sensor's threshold setting, and Q, the area coverage rate. These optimal control problem formulations yield solutions that maximize the probability of target attack while at the same time also satisfying hard bounds on the probability of false target attacks. Analysis has shown that the optimal solutions are sensitive to the particular relationship between the sensor's receiver operating characteristic parameter, c, and area coverage rate, Q. In this chapter, several different heuristics for this particular relationship are studied and the optimal dynamic schedules of the sensor threshold and area coverage rate are obtained.
C1 [Bode, John, II; Jacques, David; Pachter, Meir] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Bode, J (reprint author), USAF, Inst Technol, 2950 Hobson Way,Bldg 640, Wright Patterson AFB, OH 45433 USA.
EM John.Bode@Afit.edu; David.Jacques@Afit.edu; Meir.Pachter@Afit.edu
NR 7
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 181
EP 194
PG 14
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800011
ER
PT S
AU Yoon, Y
Gruber, S
Krakow, L
Pack, D
AF Yoon, Youngrock
Gruber, Scott
Krakow, Lucas
Pack, Daniel
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI Autonomous Target Detection and Localization Using Cooperative Unmanned
Aerial Vehicles
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon Inc
AB In this chapter we present sensor implementation issues encountered in developing a team of cooperative unmanned aerial vehicles (UAVs) for intelligence, surveillance and reconnaissance missions. UAVs that compose the cooperative team are equipped with heterogeneous sensors and onboard processing capability. The sensor information collected by each UAV is constantly shared among the neighboring UAVs and processed locally using Out-of-Order Sigma-Point Kalman Filtering (O(3)SPKF) techniques. Results from flight experiments support, the effectiveness of the cooperative autonomous UAV technologies.
C1 [Yoon, Youngrock; Gruber, Scott; Krakow, Lucas; Pack, Daniel] USAF Acad, Unmanned Syst Lab, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
RP Yoon, Y (reprint author), USAF Acad, Unmanned Syst Lab, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
EM youngrock.yoon@usafa.edu; scott.gruber@usafa.edu;
lucas.krakow@usafa.edu; daniel.pack@usafa.edu
NR 10
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 195
EP 205
PG 11
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800012
ER
PT S
AU Pham, KD
AF Pham, Khanh D.
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI New Results in Stochastic Cooperative Games: Strategic Coordination for
Multi-resolution Performance Robustness
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon Inc
AB This chapter provides a concise and up-to-date analysis of the foundations of performance robustness of a, linear-quadratic class of cooperative decision-making with respect to variability in a stationary and stochastic environment. The dynamics of large-scale and interconnected dynamical systems corrupted by a standard stationary Wiener process include decision activities that are controlled by decentralized decision makers. Basic assumptions will be that cooperative decision makers form a coalition and have access to the current Value of the states of the systems. The performance robustness and uncertainty of the coalition is now affected by other non-cooperative participants such as model deviations and environmental disturbances, named Nature. A decentralized model-follow in g approach where interactions among coalitive decision makers are represented by reduced order models, is taken to derive various local decisions without intensive information interchanges. Decentralized decision strategies considered here collaboratively optimize an advanced multi-objective criterion over time where the optimization takes place with high regard for possible random sample realizations by Nature who may more likely not be acting in concert. The implementation of decision gain parameters in the finite horizon case is shown to be feasible. The inherent decision structure now has two degrees of freedom including: one, state feedback gains with state measurements that are robust against performance uncertainty; and two, interactive feedback gains that minimize differences between the actual and desirable interactions.
C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Pham, KD (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM khanh.pham@kirtland.af.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 257
EP 285
PG 29
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800016
ER
PT S
AU Zarzhitsky, D
Schlegel, M
Decker, A
Pack, D
AF Zarzhitsky, Dimitri
Schlegel, Marc
Decker, Andreas
Pack, Daniel
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI An Event-Driven Software Architecture for Multiple Unmanned Aerial
Vehicles to Cooperatively Locate Mobile Targets
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon Inc
DE cooperative search and localization; distributed sensor networks;
multi-threaded design; intelligent systems
AB Today's state-of-the-art, real-time distributed systems require sophisticated software engineering techniques to support, a diverse set of mission requirements. This chapter discusses an event-driven approach to the design of such systems in the context of a fully-functional search and localization application intended for unmanned aerial vehicles. Here, the discussion focuses on the basic design principles that form the foundation of the distributed, scalable, and cross-platform implementation, and it; provides an evaluation of the system's performance on a set of representative tasks. The main contribution of this effort consists of a modular software framework that is well-suited for solving problems in distributed intelligence and autonomous robotic systems. This framework is an enabling technology that integrates different functional components, such is sensing, analysis, and control into one cohesive platform. This solution employs off-the-shelf commercial technologies, resulting in a low-cost implementation that exhibits both robustness and flexibility.
C1 [Zarzhitsky, Dimitri; Schlegel, Marc; Decker, Andreas; Pack, Daniel] USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
RP Zarzhitsky, D (reprint author), USAF Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
EM dimitri.zarzhitsky@usafa.edu; daniel.pack@usafa.edu
NR 9
TC 1
Z9 1
U1 1
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 299
EP 318
PG 20
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800018
ER
PT S
AU Commander, CW
Pardalos, PM
Ryabchenko, V
Sarykalin, S
Turko, T
Uryasev, S
AF Commander, Clayton W.
Pardalos, Panos M.
Ryabchenko, Valeriy
Sarykalin, Sergey
Turko, Timofey
Uryasev, Stan
BE Hirsch, MJ
Commander, CW
Pardalos, PM
Murphey, R
TI Robust Wireless Network Jamming Problems
SO OPTIMIZATION AND COOPERATIVE CONTROL STRATEGIES
SE Lecture Notes in Control and Information Sciences
LA English
DT Proceedings Paper
CT 8th International Conference on Cooperative Control and Optimization
CY JAN 30-FEB 01, 2008
CL Gainesville, FL
SP AF Res Lab, Univ Florida, Ctr Appl Optimizat, Raytheon
AB We extend the results presented in a previous paper which focused on deterministic formulations of the WIRELESS NETWORK JAMMING PROBLEM. This problem seeks to determine the optimal number and placement locations for a set of wireless jamming devices to sufficiently suppress a communication network according to some specified criterion. We now introduce robust variants of those formulations which account for the fact that the exact topology of the network to be jammed may not be known entirely. Particularly, we consider instances in which several topologies axe considered likely, and develop robust scenarios for placing jamming devices which are able to suppress the network regardless of which candidate topology is realized. We derive several formulation and include percentile constraints to account for a variety of scenarios. Case studies are presented and the results are analyzed. We conclude with directions of future research.
C1 [Commander, Clayton W.] US Air Force, Res Lab, Eglin AFB, FL 32542 USA.
[Pardalos, Panos M.; Ryabchenko, Valeriy; Sarykalin, Sergey; Turko, Timofey; Uryasev, Stan] Univ Florida, Dept Ind & Syst Engn, Gainesville, FL 32611 USA.
RP Commander, CW (reprint author), US Air Force, Res Lab, Eglin AFB, FL 32542 USA.
EM clayton.commander@eglin.ad.mil; pardalos@ufl.edu; valeriy@ufl.edu;
saryk@ufl.edu; jk13@ufl.edu; uryasev@ufl.edu
OI Commander, Clayton/0000-0001-8477-932X
FU Air Force Office of Scientific Research [FA9550-05-1-0137]
FX The authors gratefully acknowledge the Air Force Office of Scientific
Research for providing funding under project FA9550-05-1-0137
NR 15
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0170-8643
BN 978-3-540-88062-2
J9 LECT NOTES CONTR INF
PY 2009
VL 381
BP 399
EP +
PG 3
WC Automation & Control Systems; Computer Science, Information Systems;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BJE29
UT WOS:000265134800023
ER
PT S
AU Arulselvan, A
Commander, CW
Hirsch, MJ
Pardalos, PM
AF Arulselvan, Ashwin
Commander, Clayton W.
Hirsch, Michael J.
Pardalos, Panos M.
BE Chaovalitwongse, W
Furman, KC
Pardalos, PM
TI Communication Models for a Cooperative Network of Autonomous Agents
SO OPTIMIZATION AND LOGISTICS CHALLENGES IN THE ENTERPRISE
SE Springer Series in Optimization and Its Applications
LA English
DT Article; Book Chapter
AB We consider the problem of maximizing the total connectivity for a set of wireless agents in a mobile ad hoc network. That is, given a set of wireless units each having a start point and a destination point, our goal is to determine a set of routes for the units which maximizes the overall connection time between them. Known as the COOPERATIVE COMMUNICATION PROBLEM IN MOBILE AD HOC NETWORKS (CCPM), this problem has several military applications including coordination of rescue groups, path planning for unmanned air vehicles, and geographical exploration and target recognition. The CCPM is NP-hard; therefore heuristic development has been the major focus of research. In this work, we survey the CCPM examining first some early combinatorial formulations and solution techniques. Then we introduce new continuous formulations and compare the results of several case studies. By removing the underlying graph structure, we are able to create a more realistic model of the problem as supported by the numerical evidence.
C1 [Arulselvan, Ashwin; Pardalos, Panos M.] Univ Florida, Dept Ind & Syst Engn, Gainesville, FL 32611 USA.
[Commander, Clayton W.] USAF, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
[Hirsch, Michael J.] Raytheon Inc, Network Centr Syst, St Petersburg, FL 33710 USA.
RP Arulselvan, A (reprint author), Univ Florida, Dept Ind & Syst Engn, Gainesville, FL 32611 USA.
EM ashwin@ufl.edu; clayton.commander@eglin.af.mil;
michael_j_hirsch@Raytheon.com; pardalos@ufl.edu; pardalos@ufl.edu
OI Commander, Clayton/0000-0001-8477-932X
NR 27
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1931-6828
BN 978-0-387-88616-9
J9 SPRINGER SER OPTIM A
PY 2009
VL 30
BP 411
EP 431
DI 10.1007/978-0-387-88617-6_15
D2 10.1007/978-0-387-88617-6
PG 21
WC Engineering, Industrial; Mathematics, Applied
SC Engineering; Mathematics
GA BKG81
UT WOS:000268037300015
ER
PT J
AU Green, L
Li, YN
White, T
Urbas, A
Bunning, T
Li, Q
AF Green, Lisa
Li, Yannian
White, Timothy
Urbas, Augustine
Bunning, Timothy
Li, Quan
TI Light-driven molecular switches with tetrahedral and axial chirality
SO ORGANIC & BIOMOLECULAR CHEMISTRY
LA English
DT Article
ID NEMATIC LIQUID-CRYSTALS; HELICAL TWISTING POWER; PHOTOCHEMICAL
MODULATION; AZOBENZENE; COLOR; PHOTOISOMERIZATION; AMPLIFICATION;
BEHAVIOR
AB Two light-driven molecular switches with tetrahedral and axial chirality were synthesized, which can induce a helical superstructure in an achiral liquid crystal host and dynamically phototune it to achieve reversible reflection color.
C1 [Green, Lisa; Li, Yannian; Li, Quan] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
[White, Timothy; Urbas, Augustine; Bunning, Timothy] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, Q (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
EM quan@lci.kent.edu
RI Li, Yannian/B-7000-2012; White, Timothy/D-4392-2012
FU the Air Force Office of Scientific Research (AFOSR) [FA9550-09-1-0193];
the Materials and Manufacturing Directorate of the Air ForceResearch
Laboratory (AFRL); National Science Foundation (NSF IIP) [0750379]
FX The work is supported by the Air Force Office of Scientific Research
(AFOSR FA9550-09-1-0193), the Materials and Manufacturing Directorate of
the Air ForceResearch Laboratory (AFRL), and the National Science
Foundation (NSF IIP 0750379).
NR 27
TC 35
Z9 36
U1 0
U2 9
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-0520
J9 ORG BIOMOL CHEM
JI Org. Biomol. Chem.
PY 2009
VL 7
IS 19
BP 3930
EP 3933
DI 10.1039/b910583b
PG 4
WC Chemistry, Organic
SC Chemistry
GA 495LM
UT WOS:000269892900008
PM 19763294
ER
PT J
AU Rao, SI
Dimiduk, DM
El-Awady, JA
Parthasarathy, TA
Uchic, MD
Woodward, C
AF Rao, S. I.
Dimiduk, D. M.
El-Awady, J. A.
Parthasarathy, T. A.
Uchic, M. D.
Woodward, C.
TI Atomistic simulations of cross-slip nucleation at screw dislocation
intersections in face-centered cubic nickel
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
DE cross-slip; dislocation intersections; atomistic simulations; embedded
atom potentials; dislocation dynamics simulations
ID MOLECULAR-DYNAMICS; FCC CRYSTALS; PURE COPPER; MODEL
AB The Escaig model for thermally activated cross-slip in face-centered cubic (fcc) materials assumes that cross-slip preferentially occurs at obstacles that produce large stress gradients on the Shockley partials of the screw dislocations. However, it is unclear as to the source, identity and concentration of such obstacles in single-phase fcc materials. Embedded atom potential, molecular-statics simulations of screw character dislocation intersections with 120 degrees forest dislocations in fcc Ni are described that illustrate a mechanism for cross-slip nucleation. The simulations show how such intersections readily produce cross-slip nuclei and thus may be preferential sites for cross-slip. The energies of the dislocation intersection cores are estimated and it is shown that a partially cross-slipped configuration for the intersection is the most stable. In addition, simple three-dimensional dislocation dynamics simulations accounting for Shockley partials are shown to qualitatively reproduce the atomistically determined core structures for the same dislocation intersections.
C1 [Dimiduk, D. M.; Uchic, M. D.; Woodward, C.] USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
[Rao, S. I.; Parthasarathy, T. A.] UES Inc, Dayton, OH 45432 USA.
[El-Awady, J. A.] UTC, Dayton, OH 45432 USA.
RP Woodward, C (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
EM christopher.woodward@wpafb.af.mil
RI El-Awady, Jaafar/A-8020-2010; Parthasarathy, Triplicane/B-7146-2011;
El-Awady, Jaafar/E-8551-2010
OI Parthasarathy, Triplicane/0000-0002-5449-9754; El-Awady,
Jaafar/0000-0002-5715-2481
FU AFOSR
FX The authors acknowledge use of the 3D molecular dynamics code, LAAMPS,
which was developed at Sandia National Laboratory by Dr. Steve Plimpton
and co-workers. The authors also acknowledge use of the 'Matlab' version
of 3D dislocation dynamics code, ParaDiS, which was developed at
Lawrence Livermore National Laboratory by the ParaDiS team. This work
was supported by the AFOSR, and by a grant of computer time from the DOD
High Performance Computing Modernization Program, at the Aeronautical
Systems Center/Major Shared Resource Center. The work was performed at
the U. S. Air Force Research Laboratory, Materials and Manufacturing
Directorate, Wright-Patterson AFB.
NR 26
TC 13
Z9 13
U1 2
U2 10
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PY 2009
VL 89
IS 34-36
BP 3351
EP 3369
AR PII 917302643
DI 10.1080/14786430903286201
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 528XV
UT WOS:000272481200015
ER
PT S
AU Ibey, BL
Roach, WP
Pakhomov, AG
AF Ibey, Bennett L.
Roach, William P.
Pakhomov, Andrei G.
BE MahadevanJansen, A
Jansen, ED
TI Quantification of Cell Sensitivity to Nanosecond Duration Electrical
Pulses
SO PHOTONS AND NEURONS
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Photons and Neurons
CY JAN 25-26, 2009
CL San Jose, CA
SP SPIE
DE Nanosecond Electrical Pulses; Patch Clamp Technique; Electroporation;
Nanopore
ID MEMBRANE PERMEABILIZATION; MAMMALIAN-CELLS; FIELD NSPEF;
ELECTROPORATION; APOPTOSIS; TISSUES
AB Cellular exposure to nanosecond duration electrical pulses (nsEP) has been shown to elicit a marked decrease in plasma membrane resistance hypothesized to be due to formation of nanopores. Patch clamp technique has been used to measure changes in plasma membrane resistance immediately following nsEP exposure. Previous research by our group identified absorbed dose as a single metric to quantify cellular exposure across various pulse parameters. In that work, the relationship between the drop in membrane resistance and absorbed dose was hypothesized to be a measure of cell sensitivity to nsEP. In this study, we explore this hypothesis by employing patch clamp technique prior to exposure to measure whole cell currents at time points before and after exposure. Using two cell lines (GH3 and CHO), dose response curves were generated for single 60ns pulse exposures at 10 and 90 seconds post exposure. From this data, it was evident that dose response curves at 10 seconds post exposure showed increased permeability following nsEP exposure compared to 90 seconds post exposure. We attribute this difference to active recovery of the cell to nanoporation. However, at 90 seconds, the results for both cell types appeared to nearly match previously published results proving that a cell in whole cell configuration is slightly more sensitive to nsEP exposure. Future work will extend this study to include multiple nsEP exposures and additional cell lines.
C1 [Ibey, Bennett L.; Roach, William P.] USAF, Res Lab, Human Effectiveness Directorate, Directed Energy Bioeffects Div,Radio Frequency Ra, Brooks City Base, TX 78235 USA.
RP Ibey, BL (reprint author), USAF, Res Lab, Human Effectiveness Directorate, Directed Energy Bioeffects Div,Radio Frequency Ra, Brooks City Base, TX 78235 USA.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7426-1
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7180
AR 71800U
DI 10.1117/12.808016
PG 9
WC Engineering, Biomedical; Optics
SC Engineering; Optics
GA BSS62
UT WOS:000285713100015
ER
PT J
AU Pandey, RB
Heinz, H
Feng, J
Farmer, BL
Slocik, JM
Drummy, LF
Naik, RR
AF Pandey, R. B.
Heinz, Hendrik
Feng, Jie
Farmer, Barry L.
Slocik, Joseph M.
Drummy, Lawrence F.
Naik, Rajesh R.
TI Adsorption of peptides (A3, Flg, Pd2, Pd4) on gold and palladium
surfaces by a coarse-grained Monte Carlo simulation
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID IN-SILICO; DYNAMICS; NANOPARTICLES; PLATELETS; PROTEINS; KINETICS
AB Monte Carlo simulations are performed to study adsorption and desorption of coarse-grained peptide chains on generic gold and palladium surfaces in the presence of solvent. The atomistic structural details are ignored within the amino acid residues; however, their specificity and hydrophobicity are incorporated via an interaction matrix guided by atomistic simulation. Adsorption probabilities of the peptides A3, Flg, Pd2, Pd4, Gly(10), Pro(10) on gold and palladium surfaces are studied via analysis of the mobility of each residue, the interaction energy with the surface, profiles of the proximity to the surface, the radius of gyration, and comparisons to homopolymers. In contrast to the desorption of Gly10 and Pro10 (with faster global dynamics), peptides Pd2, Pd4, Flg, and A3 exhibit various degrees of adsorption on gold and palladium surfaces (with relatively slower dynamics). Adsorption on both gold and palladium occurs through aromatic anchoring residues Tyr(2) and Phe(12) in A3, Tyr(2) in Flg, Phe(2), His(10) and His(12) in Pd2, and His(6) and His(11) in Pd4. A lower (more negative) surface-interaction energy of these residues and lower mobility on palladium lead us to conclude that they are slightly more likely to be adsorbed on palladium surfaces than on gold.
C1 [Pandey, R. B.] Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
[Heinz, Hendrik; Feng, Jie] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA.
[Farmer, Barry L.; Slocik, Joseph M.; Drummy, Lawrence F.; Naik, Rajesh R.] USAF, Res Lab, Mat & Mfg Directorate, AFRL,RXBP, Wright Patterson AFB, OH 45433 USA.
RP Pandey, RB (reprint author), Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
RI Heinz, Hendrik/E-3866-2010
OI Heinz, Hendrik/0000-0002-6776-7404
FU University of Akron; Ohio Supercomputing Center
FX Support from the Materials and Manufacturing Directorate of the Air
Force Research Laboratory, the Air Force Office of Scientific Research
(AFOSR) is gratefully acknowledged. H.H. and J.F. acknowledge further
support from the University of Akron and from the Ohio Supercomputing
Center.
NR 32
TC 60
Z9 60
U1 3
U2 37
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PY 2009
VL 11
IS 12
BP 1989
EP 2001
DI 10.1039/b816187a
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 417SJ
UT WOS:000264097700013
PM 19280010
ER
PT J
AU Stickney, JA
Squires, MB
Scoville, J
Baker, P
Miller, S
AF Stickney, James A.
Squires, Matthew B.
Scoville, James
Baker, Paul
Miller, Steven
TI Collisional decoherence in trapped-atom interferometers that use
nondegenerate sources
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom optics; collision processes; interferometers; light coherence;
Monte Carlo methods; particle interferometry
ID BOSE-EINSTEIN CONDENSATE; PHASE DIFFUSION; WAVE INTERFEROMETRY
AB The coherence time, and thus sensitivity, of trapped-atom interferometers that use nondegenerate gases are limited by the collisions between the atoms. An analytic model that describes the effects of collisions between atoms in an interferometer is developed. It is then applied to an interferometer using a harmonically trapped nondegenerate atomic gas that is manipulated with a single set of standing wave laser pulses. The model is used to find the optimal operating conditions of the interferometer and direct Monte Carlo simulation of the interferometer is used to verify the analytic model.
C1 [Stickney, James A.] Space Dynam Lab, Bedford, MA 01730 USA.
[Squires, Matthew B.; Scoville, James; Baker, Paul; Miller, Steven] Hanscom AFB, AF Res Lab, Bedford, MA 01731 USA.
RP Stickney, JA (reprint author), Space Dynam Lab, Bedford, MA 01730 USA.
EM afrl.rvb.pa@hanscom.af.mil
FU Air Force Office of Scientific Research [2301DS/03VS02COR]; DARPA
FX We would like to thank Alexey Tonyushkin, Mara Prentiss, Alex Zozulya,
and Val Bykovsky for their useful conversations on this subject. The
authors acknowledge support from the Air Force Office of Scientific
Research under program/task 2301DS/03VS02COR and DARPA.
NR 24
TC 4
Z9 4
U1 2
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD JAN
PY 2009
VL 79
IS 1
AR 013618
DI 10.1103/PhysRevA.79.013618
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 401YE
UT WOS:000262979000146
ER
PT J
AU Gumbs, G
Huang, D
Echenique, PM
AF Gumbs, Godfrey
Huang, Danhong
Echenique, P. M.
TI Comparing the image potentials for intercalated graphene with a
two-dimensional electron gas with and without a gated grating
SO PHYSICAL REVIEW B
LA English
DT Article
DE carbon; gallium arsenide; hopping conduction; III-V semiconductors;
insulating thin films; semiconductor heterojunctions; two-dimensional
electron gas
ID INVERSE-PHOTOEMISSION; METAL-SURFACES; STATES; GRAPHITE; SPECTROSCOPY;
SCATTERING
AB We calculate the surface response function and the image potential of a system of layered two-dimensional (2D) electron gas structures. A point charge is placed at a distance away from the surface which lies in the xy- plane. These 2D layers are coupled through the Coulomb interaction and there is no interlayer electron hopping. The separation between adjacent layers can be adjusted to investigate the roles which the layer separation and the number of layers play on both the surface response function and the image potential. Specifically, we consider the system composed of graphene layers or the layered 2D electron gas (EG) formed at the interface of a semiconductor heterostructure such as GaAs/AlGaAs. We show that the image potential for graphene is qualitatively the same as for the 2DEG. We examine the way in which the image potential is modified by applying a one-dimensional periodic electrostatic potential (through a gated grating for modulation). The results indicate that the charge screening for graphene is not much different from the 2DEG.
C1 [Gumbs, Godfrey] CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10065 USA.
[Huang, Danhong] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Gumbs, Godfrey; Echenique, P. M.] UPV, CSIC, Ctr Mixto, San Sebastian 20018, Spain.
[Gumbs, Godfrey; Echenique, P. M.] Univ Basque Country, Fac Quim, Dept Fis Mat, San Sebastian 20018, Spain.
[Gumbs, Godfrey; Echenique, P. M.] DIPC, San Sebastian 20018, Spain.
RP Gumbs, G (reprint author), CUNY Hunter Coll, Dept Phys & Astron, 695 Pk Ave, New York, NY 10065 USA.
RI CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR.,
DIPC/C-3171-2014
FU AFRL [FA 9453-07-C-0207]; (U.S.) Air Force Office of Scientific Research
(USAFOSR)
FX This work was supported by AFRL under Contract No. FA 9453-07-C-0207 and
the (U.S.) Air Force Office of Scientific Research (USAFOSR).
NR 24
TC 4
Z9 4
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD JAN
PY 2009
VL 79
IS 3
AR 035410
DI 10.1103/PhysRevB.79.035410
PG 6
WC Physics, Condensed Matter
SC Physics
GA 401YA
UT WOS:000262978200108
ER
PT B
AU Wellems, LD
Huang, DH
Leskova, TA
Maradudin, AA
AF Wellems, L. David
Huang, D. H.
Leskova, T. A.
Maradudin, A. A.
GP ELECTROMAGNETICS ACAD
TI Optical Spectrum and Electromagnetic-Field Distribution at Double-Groove
Metallic Surface Gratings
SO PIERS 2009 MOSCOW VOLS I AND II, PROCEEDINGS
LA English
DT Proceedings Paper
CT Progress in Electromagnetics Research Symposium (PIERS 2009 Moscow)
CY AUG 12-21, 2009
CL Moscow, RUSSIA
SP Moscow State Inst Radio Engn, Elect & Automat, Russian New Univ, NVK, VIST, Russian Fdn Basic Res, Russian Acad Sci, Sci Res Inst Automat Equipment na acad VS Semenihina, VIMPEL Interstate Corp, Zhejiang Univ, Zhejiang Univ, Electromagnet Acad, MIT Ctr Electromagnet Theory & Applicat, Res Lab Elect, Electromagnet Acad
ID TRANSMISSION; LIGHT; PLASMONS; FILMS
AB The Greens function model [8] for calculating the reflection and transmission of light at etched single-groove gratings on both sides of a thin silver film was extended to study the case of double-groove gratings. A splitting of surface-plasmon-polariton (SPP) modes was found due to electromagnetic (EM) coupling between the two grooves in the complex unit-cell of the grating. Spectral features corresponding to the split SPP branches as well as the minigap between them were found in this system. From the full spatial distributions of the total EM field, the high-surface-field regions, the coupling between two grooves in the same complex unit-cell and the coupling between two nearby grooves located at the upper and lower surfaces of the metal film can be identified.
C1 [Wellems, L. David; Huang, D. H.] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Wellems, LD (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
NR 12
TC 0
Z9 0
U1 0
U2 3
PU ELECTROMAGNETICS ACAD
PI CAMBRIDGE
PA 777 CONCORD AVENUE, STE 207, CAMBRIDGE, MA 02138 USA
BN 978-1-934142-10-3
PY 2009
BP 1378
EP 1382
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BOF79
UT WOS:000276497300290
ER
PT J
AU Tomczak, SJ
Wright, ME
Guenthner, AJ
Petteys, BJ
Minton, TK
Brunsvold, A
Vij, V
McGrath, LM
Mabry, JM
AF Tomczak, S. J.
Wright, M. E.
Guenthner, A. J.
Petteys, B. J.
Minton, T. K.
Brunsvold, A.
Vij, V.
McGrath, L. M.
Mabry, J. M.
BE Mittal, KL
TI Space-Survivability and Characterization of Main-Chain and Side-Chain
POSS-Kapton (R) Polyimides
SO POLYIMIDES AND OTHER HIGH-TEMPERATURE POLYMERS: SYNTHESIS,
CHARACTERIZATION AND APPLICATIONS, VOL 5
LA English
DT Proceedings Paper
CT 5th International Symposium on Polyimides and Other High-Temperature
Polymers - Synthesis, Characterization and Applications/MST Conferences
CY NOV 05-07, 2007
CL Orlando, FL
SP MST Conf
DE Hyperthermal atomic oxygen; polyimide; Kapton; polyhedral oligomeric
silsesquioxane; POSS; space environment; polymer erosion; low Earth
orbit
ID INCOMPLETELY-CONDENSED SILSESQUIOXANES; ATOMIC OXYGEN-RESISTANT;
MEDIATED CLEAVAGE; NANOCOMPOSITES; POSS; POLYMERS; ROUTE
AB Kapton (R) polyimide is an extensively used space material in solar arrays, spacecraft thermal blankets and space inflatable structures. Upon exposure to atomic oxygen (AO) in low Earth orbit (LEO), Kapton (R) is severely degraded. An effective approach to prevent this erosion is chemically bonding polyhedral oligomeric silsesquioxane (POSS) into the polyimide matrix by copolymerization of POSS-diamine with the polyimide monomers. POSS is a silicon and oxygen cage-like structure surrounded by organic groups which can be polymerizable. The copolymerization of POSS provides Si and O in the polyimide matrix on the nano-level. X-ray photoelectron spectroscopy (XPS) studies on POSS-Kapton (R) polyimides exposed to AO from a hyperthermal AO beam generated in ground-based facilities, and in LEO on a 3.9 year flight on the Materials International Space Station Experiment-1 (MISSE-1), show that a silica surface layer forms on POSS-Kapton (R) polyimide films in AO-rich environments. After exposure to a fluence of 8.5 x 10(20) O atoms/cm(2) in simulated LEO facility, erosion yields of 3.5 and 7 wt% Si8O11 main chain (MC) POSS-Kapton (R) samples were 3.7 and 0.98 percent, respectively, of the erosion yield for commercial Kapton H (R). MC-and SC-POSS-Kaptons (R) were found to have similar physical properties and comparable AO-resistance in a simulated LEO environment.
C1 [Tomczak, S. J.; Mabry, J. M.] USAF, Res Lab, Prop Mat Applicat Branch, Edwards AFB, CA 93524 USA.
RP Tomczak, SJ (reprint author), USAF, Res Lab, Prop Mat Applicat Branch, Edwards AFB, CA 93524 USA.
EM sandra.tomczak@edwards.af.mil
RI Brunsvold, Amy/H-4315-2016
OI Brunsvold, Amy/0000-0001-9257-2978
NR 42
TC 0
Z9 1
U1 0
U2 4
PU E J BRILL
PI PA LEIDEN
PA PO BOX 9000, NL-2300 PA LEIDEN, NETHERLANDS
BN 978-90-474-2411-6
PY 2009
BP 227
EP 245
PG 19
WC Polymer Science
SC Polymer Science
GA BBY83
UT WOS:000308911600012
ER
PT J
AU Bai, ZW
Juhl, SB
Venkat, N
Dang, TD
AF Bai, Zongwu
Juhl, Shane B.
Venkat, Narayanan
Dang, Thuy D.
BE Mittal, KL
TI High-Performance Composite Membranes Based on Sulfonated
Polyarylenethioethersulfone and Sulfonated Polybenzimidazole for Fuel
Cell Applications
SO POLYIMIDES AND OTHER HIGH-TEMPERATURE POLYMERS: SYNTHESIS,
CHARACTERIZATION AND APPLICATIONS, VOL 5
LA English
DT Proceedings Paper
CT 5th International Symposium on Polyimides and Other High-Temperature
Polymers - Synthesis, Characterization and Applications/MST Conferences
CY NOV 05-07, 2007
CL Orlando, FL
SP MST Conf
DE Sulfonated polyarylenethioethersulfone (SPTES); sulfonated
polybenzimidazole (SPBI); polymer composite; proton exchange membrane
(PEM); proton conductivity
ID PROTON-EXCHANGE MEMBRANES; POLYMER ELECTROLYTE; CONDUCTIVITY; BLENDS
AB Fabrication of novel composite proton exchange membranes (PEMs) comprising a fully sulfonated polyarylenethioethersulfone (SPTES) and sulfonated poly(p-phenylene benzobisimidazole) (SPBI) and the evaluation of the membrane properties are described. The composite membrane was obtained via a solvent-cast process in a mixture of DMAc and methanol as solvents. The composite membrane proton conductivity, as measured by four-probe impedance spectroscopy, was found to increase with increase in the SPTES content in the composite. The highest proton conductivity obtained was similar to 80 mS/cm at 65 degrees C and 85% relative humidity for the SPTES/SPBI 70/30 composite membrane which was considerably less than the proton conductivity of 300 mS/cm for the pure SPTES membrane under the same conditions, but it was found that the swelling of the composite membranes was dramatically reduced due to the decreased water uptake of the composite membranes relative to that of SPTES. The morphology of the SPTES/SPBI composite membranes was also examined by a combination of techniques such as Wide Angle X-ray Diffraction (WAXD), Scanning Electron Microscopy (SEM) and tapping mode Atomic Force Microscopy (AFM) to confirm the dispersion of SPBI and study the composite micro-structure. These studies also involved the preliminary evaluation of the MEA (Membrane Electrode Assembly) performance of the composite membranes for H-2/O-2 fuel cells applications.
C1 [Bai, Zongwu; Venkat, Narayanan] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Dang, TD (reprint author), USAF, Res Lab RXBP, Wright Patterson AFB, OH 45433 USA.
EM thuy.dang@wpafb.af.mil
NR 17
TC 0
Z9 0
U1 0
U2 1
PU E J BRILL
PI PA LEIDEN
PA PO BOX 9000, NL-2300 PA LEIDEN, NETHERLANDS
BN 978-90-474-2411-6
PY 2009
BP 323
EP 338
PG 16
WC Polymer Science
SC Polymer Science
GA BBY83
UT WOS:000308911600019
ER
PT J
AU Sherman, NP
Kharoufeh, JP
Abramson, MA
AF Sherman, Nathan P.
Kharoufeh, Jeffrey P.
Abramson, Mark A.
TI AN M/G/1 RETRIAL QUEUE WITH UNRELIABLE SERVER FOR STREAMING MULTIMEDIA
APPLICATIONS
SO PROBABILITY IN THE ENGINEERING AND INFORMATIONAL SCIENCES
LA English
DT Article
ID STARTING FAILURES; VACATIONS; BREAKDOWNS; CUSTOMERS; SERVICE; SUBJECT;
SYSTEM; MODEL
AB As a model for streaming multimedia applications, we study an unreliable retrial queue with infinite-capacity orbit and normal queue for which the retrial rate and the server repair rate are controllable. Customers join the retrial orbit if and only if their service is interrupted by a server failure. Interrupted Customers do not rejoin the normal queue but repeatedly attempt to access the server at independent and identically distributed intervals until it is found functioning and idle. We provide stability conditions, queue length distributions, stochastic decomposition results, and performance measures. The joint optimization of the retrial and server repair rates is also studied.
C1 [Sherman, Nathan P.] USAF, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
[Abramson, Mark A.] USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Kharoufeh, Jeffrey P.] Univ Pittsburgh, Dept Ind Engn, Pittsburgh, PA 15261 USA.
RP Sherman, NP (reprint author), USAF, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
EM Nathan.Sherman@pentagon.af.mil; jkharouf@pitt.edu;
Mark.Abramson@afit.edu
FU Air Force Office of Scientific Research [FIATA0634J001]
FX We wish to express our gratitude to an anonymous referee and Professor
Mark Lewis for several useful comments. This research was sponsored by
the Air Force Office of Scientific Research (FIATA0634J001).
NR 27
TC 10
Z9 10
U1 0
U2 1
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0269-9648
J9 PROBAB ENG INFORM SC
JI Probab. Eng. Inform. Sci.
PY 2009
VL 23
IS 2
BP 281
EP 304
DI 10.1017/S0269964809000175
PG 24
WC Engineering, Industrial; Operations Research & Management Science;
Statistics & Probability
SC Engineering; Operations Research & Management Science; Mathematics
GA 424QW
UT WOS:000264582600006
ER
PT S
AU Swihart, DE
Griffin, E
AF Swihart, Donald E.
Griffin, Edward
BE Mastorakis, NE
Mladenov, V
Bojkovic, Z
Kartalopoulos, S
Varonides, A
Jha, M
TI Automatic Ground Collision Avoidance System (AUTO GCAS)
SO PROCEEDINGS OF THE 13TH WSEAS INTERNATIONAL CONFERENCE ON SYSTEMS:
RECENT ADVANCES IN SYSTEMS
SE Mathematics and Computers in Science and Engineering
LA English
DT Proceedings Paper
CT 13th WSEAS International Conference on SYSTEMS held at the 13th WSEAS
CSCC Multiconference
CY JUL 22-24, 2009
CL Rhodes Isl, GREECE
SP WSEAS
DE automatic; mishap; system; nuisance; simulation
AB Currently, all collision avoidance systems on fighter aircraft depend on the pilot taking action whenever a warning is issued by the manual system. Any future substantial reductions in mishap rates require extending the collision avoidance technology to systems that not only warn the pilot but also take control and fly the aircraft out of danger before returning control to the pilot. This paper will discuss the requirements, design methods, and testing of Auto GCAS. It will show why a nuisance warning is considered a higher priority than the aircraft recovery and how an automatic system can be designed to basically eliminate nuisances. It will discuss how the design of a modular automatic collision avoidance system can be transitioned to any number of air vehicles with minimum changes to the basic design. Integrity management will be discussed. The process of testing an automatic system including both simulation and flight test will also be discussed. Discussions on flight test activities including both current and past experience in Auto GCAS is included..
C1 [Swihart, Donald E.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Swihart, DE (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM donald.swihart@wpafb.af.mil; edward.m.griffin@lmco.com
NR 10
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC
PI ATHENS
PA AG LOANNOU THEOLOGOU 17-23, 15773 ZOGRAPHOU, ATHENS, GREECE
SN 1792-4308
BN 978-960-474-097-0
J9 MATH COMPUT SCI ENG
PY 2009
BP 429
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Robotics
SC Computer Science; Engineering; Robotics
GA BMF43
UT WOS:000272165400063
ER
PT B
AU Nowak, M
AF Nowak, Michael
BE McQuay, W
Smari, WW
TI The Importance of Trust in a Layered Sensing Construct
SO PROCEEDINGS OF THE 2009 INTERNATIONAL SYMPOSIUM ON COLLABORATIVE
TECHNOLOGIES AND SYSTEMS
LA English
DT Proceedings Paper
CT International Symposium on Collaborative Technologies and Systems
CY MAY 18-22, 2009
CL Baltimore, MD
SP IEEE, ACM, IFIP
DE Layered sensing; trust; autonomic networks; situation awareness
C1 USAF, Res Lab, Auton Trusted Sensing Persistent Intelligence Div, Sensors Directorate, Dayton, OH USA.
RP Nowak, M (reprint author), USAF, Res Lab, Auton Trusted Sensing Persistent Intelligence Div, Sensors Directorate, Dayton, OH USA.
EM michael.nowak@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4585-1
PY 2009
BP 91
EP 92
DI 10.1109/CTS.2009.5067466
PG 2
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary
SC Computer Science; Engineering
GA BLS38
UT WOS:000270937300011
ER
PT B
AU Erickson, J
AF Erickson, John
BE McQuay, W
Smari, WW
TI Trust Metrics
SO PROCEEDINGS OF THE 2009 INTERNATIONAL SYMPOSIUM ON COLLABORATIVE
TECHNOLOGIES AND SYSTEMS
LA English
DT Proceedings Paper
CT International Symposium on Collaborative Technologies and Systems
CY MAY 18-22, 2009
CL Baltimore, MD
SP IEEE, ACM, IFIP
DE Autonomic trusted sensing; layered sensing; metrics; trust;
trustworthiness
AB We expect our access to use outside information to be a simple affair. We know we need specific information ... we know someone is collecting or generating it ... we know someone is processing it ... we know someone is transmitting it to us ... we expect it to be perfect. But that is where everything breaks down because each of us comes up with a different conclusion (using similar information). One reason is related to the Qualia argument [1] that "all of our sensors are calibrated to ourselves and that we interpret inputs differently". There is a quantization-like error, or noise, in all of the inputs we take in that corrupts, or alters, the results of our internal processes. Another reason is that the information we are consuming is corrupted, either unintentionally or intentionally, somewhere between its conception and processing to a final result. Both of these reasons are related to Trust. However, Trust means something different to everyone. The question becomes "how do we measure Trust so we know how the information we want to use will affect the results"? The Autonomic Trusted Sensing for Persistent Intelligence (ATSPI) Technology Office is following a scientific approach to understand, assess, and react to Trust measurements.
C1 USAF, Res Lab, Auton Trusted Sensing Persistent Intelligence ATS, Sensors Directorate, Dayton, OH USA.
RP Erickson, J (reprint author), USAF, Res Lab, Auton Trusted Sensing Persistent Intelligence ATS, Sensors Directorate, Dayton, OH USA.
EM john.erickson@wpafb.af.mil
NR 6
TC 4
Z9 4
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4585-1
PY 2009
BP 93
EP 97
DI 10.1109/CTS.2009.5067467
PG 5
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary
SC Computer Science; Engineering
GA BLS38
UT WOS:000270937300012
ER
PT J
AU Rogers, MM
Huffman, RE
Shearer, CM
AF Rogers, Marshall M.
Huffman, Richard E., Jr.
Shearer, Christopher M.
GP ION
TI An Investigation into the Feasibility of using a Modern Gravity
Gradiometer Instrument for Passive Aircraft Navigation and Terrain
Avoidance
SO PROCEEDINGS OF THE 2009 INTERNATIONAL TECHNICAL MEETING OF THE INSTITUTE
OF NAVIGATION - ITM 2009
LA English
DT Proceedings Paper
CT 2009 International Technical Meeting of the Institute-of-Navigation
CY JAN 26-28, 2009
CL Anaheim, CA
ID GRADIENTS
AB Over the past decade, Gravity Gradient Instruments (GGIs) have improved remarkably in accuracy due to the development and refinement of a variety of accelerometer technologies. Some specialized GGIs are currently flown on aircraft for geological purposes in the mining industries and, as such, gravity gradient data is recorded in flight and detailed gradient maps are created after post mission processing. These maps, if stored in a database onboard an aircraft and combined with a GGI, form the basis for a covert navigation system using a process known as the "map matching" method. This system, if it could be successfully implemented, would be completely passive - impervious to conventional jamming methods and relying only on local gravity gradient measurements from an onboard sensor.
This paper entails an investigation into the feasibility of using a modern GGI on an airborne platform for covert navigation and terrain avoidance by quantifying navigation performance in different flight scenarios (low, medium, & high altitudes and velocities). Previous studies using gravity gradiometers have been accomplished with promising results (some theoretical gradiometers have been predicted to produce GPS-like navigation accuracy). However, "rotating disk" style gradiometers are the only type currently used in airborne surveys. While major improvements have been made to these instruments, they still produce noise at least an order of magnitude too high for useful aircraft navigation purposes. This research focuses on the implementation of an airborne superconducting GGI, currently in flight test, which has demonstrated approximately 10x better sensitivity than the rotating disk GGI in a laboratory setting. To demonstrate whether or not this technology is currently feasible, a model of the GGI sensor was developed to investigate signal levels at representative flight conditions. Using the sensor model, representative aircraft trajectories were "flown" over modeled gravity gradient maps to determine the utility of flying current GGIs in the roles of terrain avoidance and navigation. The results of the GGI simulations at different altitudes, velocities, gravity gradient map resolutions and gradiometer sensitivities will be presented and discussed. It is shown that the map matching superconducting GGI navigation system has the potential to provide a marked improvement over a non-aided INS in some cases but is limited by the drop in gravity gradient strength at higher altitudes, particularly in areas of smooth terrain, and the availability and accuracy of gradient maps. It was originally hypothesized that the GGI could also be used for terrain avoidance due to the rapid signal change as rising terrain is approached. However, GGI gradient production rate and bandwidth limitations, along with the inverse nature of the terrain avoidance problem, rendered GGI aided terrain avoidance unfeasible for the time being.
C1 [Rogers, Marshall M.; Huffman, Richard E., Jr.; Shearer, Christopher M.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Rogers, MM (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 34
TC 0
Z9 7
U1 1
U2 3
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2009
BP 49
EP 60
PG 12
WC Computer Science, Artificial Intelligence; Remote Sensing;
Telecommunications
SC Computer Science; Remote Sensing; Telecommunications
GA BPT37
UT WOS:000279863400006
ER
PT J
AU Bingham, JK
Veth, MJ
AF Bingham, Jason K.
Veth, Michael J.
GP ION
TI Vision-Aided, Cooperative Navigation for Multiple Unmanned Vehicles
SO PROCEEDINGS OF THE 2009 INTERNATIONAL TECHNICAL MEETING OF THE INSTITUTE
OF NAVIGATION - ITM 2009
LA English
DT Proceedings Paper
CT 2009 International Technical Meeting of the Institute-of-Navigation
CY JAN 26-28, 2009
CL Anaheim, CA
AB In the recent past, a shift has taken place from manned to unmanned Intelligence, Surveillance, and Reconnaissance (ISR) missions. This shift has lead to an increase in the number of unmanned vehicles (UV) operating in a theater. Additionally, removal of the crew allows for a reduction in the scale of the vehicles, which in turn leads to an increased ability to operate in GPS degraded environments. These environments include but are not limited to urban canyons, caves, and building interiors. With the loss of GPS signal the vehicles must rely on Inertial Navigation Systems (INS) which when reduced to an appropriate size are inherently inaccurate. As the reliance on these vehicles increases so does the desire for ever more accurate navigation and targeting. In this paper, we endeavor to exploit three attributes of the increase in UV use for ISR missions. The first attribute is the increased numbers of UVs in a theater, while the remaining two attributes of on-board vision systems and wireless communication are inherent in the ISR mission.
This paper's focus is the development and validation of a cooperative navigation system based on the measurement of UV position relative to shared landmark position estimates. Each UV in the network locates landmarks using it's on-board vision system and transmits the data to all other system UVs. After receiving data from the other UVs, the system uses the landmarks as additional measurements.
The system is evaluated using Matlab simulation. Three simulations are created to perform the evaluation. The first provides individual position and attitude estimates without interaction between the UVs. The second provides the same estimates using the cooperative system without ranging information between UVs while the third includes ranging. The results of the simulations are used to demonstrate the improvements provided by the utilization of shared landmarks.
C1 [Bingham, Jason K.; Veth, Michael J.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Bingham, JK (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
NR 9
TC 0
Z9 0
U1 0
U2 1
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2009
BP 804
EP 813
PG 10
WC Computer Science, Artificial Intelligence; Remote Sensing;
Telecommunications
SC Computer Science; Remote Sensing; Telecommunications
GA BPT37
UT WOS:000279863400079
ER
PT J
AU Gray, JR
Veth, MJ
AF Gray, Jeff R.
Veth, Michael J.
GP ION
TI Deeply-Integrated Feature Tracking for Embedded Navigation
SO PROCEEDINGS OF THE 2009 INTERNATIONAL TECHNICAL MEETING OF THE INSTITUTE
OF NAVIGATION - ITM 2009
LA English
DT Proceedings Paper
CT 2009 International Technical Meeting of the Institute-of-Navigation
CY JAN 26-28, 2009
CL Anaheim, CA
AB The Air Force Institute of Technology is investigating techniques to improve aircraft navigation using low-cost imaging and inertial sensors [1]. Stationary features tracked within the image are used to improve the inertial navigation estimate. Features are tracked using a correspondence search between frames. Previous research investigated aiding these correspondence searches using inertial measurements (i.e., stochastic projection) [2]. While this research demonstrated the benefits of further sensor integration, it still relied on robust feature descriptors (e.g., SIFT or SURF) to obtain a reliable correspondence match in the presence of rotation and scale changes. Unfortunately, these robust feature extraction algorithms are computationally intensive and require significant resources for real-time operation. Simpler feature extraction algorithms are much more efficient, but their feature descriptors are not invariant to scale, rotation, or affine warping which limits matching performance during arbitrary motion. This research uses inertial measurements to predict not only the location of the feature in the next image but also the feature descriptor, resulting in robust correspondence matching with low computational overhead. Navigation experiments using the previous and newly developed filter updates are presented.
C1 [Gray, Jeff R.; Veth, Michael J.] USAF, Inst Technol, Adv Nav Technol Ctr, Wright Patterson AFB, OH 45433 USA.
RP Gray, JR (reprint author), USAF, Inst Technol, Adv Nav Technol Ctr, Wright Patterson AFB, OH 45433 USA.
NR 15
TC 2
Z9 2
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2009
BP 1018
EP 1025
PG 8
WC Computer Science, Artificial Intelligence; Remote Sensing;
Telecommunications
SC Computer Science; Remote Sensing; Telecommunications
GA BPT37
UT WOS:000279863400104
ER
PT S
AU Jordan, JD
Melouk, SH
Faas, PD
AF Jordan, Jeremy D.
Melouk, Sharif H.
Faas, Paul D.
GP IEEE
TI ANALYZING PRODUCTION MODIFICATIONS OF A C-130 ENGINE REPAIR FACILITY
USING SIMULATION
SO PROCEEDINGS OF THE 2009 WINTER SIMULATION CONFERENCE (WSC 2009 ), VOL
1-4
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference 2009
CY DEC 13-16, 2009
CL Austin, TX
SP IEEE
AB The LRAFB C-130 engine repair facility is one of the top T-56 engine refurbishing plants in the United States Air Force. Currently, the shop is prevented from testing potential contingencies within their environment due to the rapid nature of their engine repair process. A simulation approach is needed to test various scenarios and determine the maximum capacity the shop can handle in its current configuration. Particularly, the simulation describes the consequences of increasing engine production on the shops personnel and throughput production figures for several policy variations. A detailed verification and validation of the model are shown, establishing the computational efficacy of the model in preparation for the comparative analysis. The model is a starting block for an Air Force wide analysis of C-130 engine rebuilding production needs with an overarching goal of standardization in repair methods and efficient operations.
C1 [Jordan, Jeremy D.; Faas, Paul D.] USAF, Res Lab, Area B, Bldg 190, Wright Patterson AFB, OH 45433 USA.
[Melouk, Sharif H.] Univ Alabama, Dept Informat Syst Stat & Management Sci, Tuscaloosa, AL 35487 USA.
RP Jordan, JD (reprint author), USAF, Res Lab, Area B, Bldg 190, Wright Patterson AFB, OH 45433 USA.
EM jeremy.jordan@us.af.mil; smelouk@cba.us.edu; paul.faas@wpafb.af.mil
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4244-5770-0
J9 WINT SIMUL C PROC
PY 2009
BP 1729
EP +
PG 3
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BUJ11
UT WOS:000289492501025
ER
PT S
AU Issa, RRA
Suermann, PC
Olbina, S
AF Issa, Raja R. A.
Suermann, Patrick C.
Olbina, Svetlana
GP IEEE
TI USE OF BUILDING INFORMATION MODELS IN SIMULATIONS
SO PROCEEDINGS OF THE 2009 WINTER SIMULATION CONFERENCE (WSC 2009 ), VOL
1-4
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference 2009
CY DEC 13-16, 2009
CL Austin, TX
SP IEEE
AB The transition to Building Information Modeling (BIM) represents a substantial shift from existing business practices in the architecture, engineering, construction, and facility operations (AECO) arena. While the move from drafting to computer aided design (CAD) sought to automate an existing business practice, successful BIM virtually builds a structure first. Similar to the virtual prototypes in the manufacturing industry, now AECO designers and maintainers can use these virtual models for evaluating various courses of action for improved design and construction. This is especially true in the area of sustainability analysis for design factors such as day-lighting, climate control, and energy usage. This paper will address new emerging business processes stemming from BIM simulations.
C1 [Issa, Raja R. A.; Olbina, Svetlana] Univ Florida, Rinker Sch Bldg Construct, Gainesville, FL 32611 USA.
[Suermann, Patrick C.] USAF, Ctr Engn & Environm, San Antonio, TX 78231 USA.
RP Issa, RRA (reprint author), Univ Florida, Rinker Sch Bldg Construct, Gainesville, FL 32611 USA.
EM raymond-issa@ufl.edu; patrick.suermann@brooks.af.mil; solbina@ufl.edu
NR 1
TC 0
Z9 0
U1 2
U2 8
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4244-5770-0
J9 WINT SIMUL C PROC
PY 2009
BP 2534
EP +
PG 2
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BUJ11
UT WOS:000289492501104
ER
PT J
AU Storms, WF
Raquet, JF
AF Storms, William F.
Raquet, John F.
BA Wang, J
Feng, Y
Wang, C
BF Wang, J
Feng, Y
Wang, C
TI Magnetic Field Aided Vehicle Tracking
SO PROCEEDINGS OF THE 22ND INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2009)
LA English
DT Proceedings Paper
CT 22nd International Technical Meeting of the Satellite Division of the
Institute-of-Navigation (ION GNSS-09)
CY SEP 22-25, 2009
CL Savannah, GA
AB This paper investigates the possibility of using magnetic field variation to navigate in an indoor environment, where satellite signals would not be available and where magnetic anomalies are known to exist. The approach used is a multi-beam terrain navigation algorithm adapted to use magnetic field intensity from a three-axis magnetometer. A previous outdoor effort used a similar approach, but combines the three magnetic measurements to look at the total magnitude of the magnetic field at a specific point in space. The new method described uses three-axis magnetometer measurements, which provides a more unique position solution than using the total magnitude. The position measurement is then incorporated with an inertial navigation systems position estimate using a Kalman filter.
The magnetic aided position algorithm was tested in both a vehicle positioning algorithm (single vehicle) and a vehicle tracking algorithm (two vehicles in a lead/trail configuration). Sub-meter level navigation accuracies are shown for both of these cases using real magnetic field data in a hallway at the Air Force Institute of Technology.
C1 [Storms, William F.] USAF, Inst Technol, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Storms, WF (reprint author), USAF, Inst Technol, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 12
TC 3
Z9 3
U1 0
U2 2
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2009
BP 1767
EP 1774
PG 8
WC Computer Science, Artificial Intelligence; Telecommunications
SC Computer Science; Telecommunications
GA BSG19
UT WOS:000284356201079
ER
PT B
AU Voevodin, AA
Muratore, C
Aouadi, SA
AF Voevodin, A. A.
Muratore, C.
Aouadi, S. A.
BE Sohrab, SH
Catrakis, HJ
Kobasko, N
TI Thermal Load Adaptive Surfaces with Microencapsulated Phase Change
Materials
SO PROCEEDINGS OF THE 7TH IASME/WSEAS INTERNATIONAL CONFERENCE ON HEAT
TRANSFER, THERMAL ENGINEERING AND ENVIRONMENT (HTE'09)
LA English
DT Proceedings Paper
CT 7th IASME/WSEAS International Conference on Heat Transfer, Thermal
Engineering and Environment (HTE '09)
CY AUG 20-22, 2009
CL Moscow, RUSSIA
SP IASME, WSEAS
DE phase change material; thermal storage; surface heating;
microelectronics
AB The performance stabilization of microelectronic devices and components can benefit from maintaining a constant temperature profile during short term transient loading events. The paper investigates the utility of phase change materials (PCMs) encapsulated as micro-reservoirs within a Si wafer surface for short term thermal energy storage as one possible solution to mitigate temperature transient spikes and provide adaptive surfaces to accommodate thermal loads. Patterned silicon Substrates with 20 micron wide by 10 micron deep holes were prepared with reactive ion etch Surface processing. The holes were filled with a paraffin wax known to undergo melting at a target operating temperature of <60 degrees C. An infrared microscope was used to identify temperature maps for specific regions on the surface under both homogeneous and localized thermal load. For a homogeneous thermal load, the temperature was adjusted over the entire surface sample area using an actively heated and cooled sample stage. A transient and highly localized surface heating was accomplished with a 15 micron diameter Pulsed infrared laser spot. These techniques helped to quantify the thermal response of the composite Si/PCM surfaces during melting of embedded PCM. The composite Si/PCM surfaces demonstrated about 0.1 J cm(-2) areal thermal storage density. Results for the in-situ transient temperature investigations of Si/PCM surfaces are discussed as possible means for maintenance of a constant surface temperature during thermal load transient events.
C1 [Voevodin, A. A.; Muratore, C.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Aouadi, S. A.] Southern Illinois Univ, Dept Phys, Carbondale, IL 62901 USA.
RP Voevodin, AA (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM andrey.voevodin@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 4
TC 0
Z9 0
U1 0
U2 2
PU WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC
PI ATHENS
PA AG LOANNOU THEOLOGOU 17-23, 15773 ZOGRAPHOU, ATHENS, GREECE
BN 978-960-474-105-2
PY 2009
BP 44
EP +
PG 2
WC Engineering, Mechanical
SC Engineering
GA BNE72
UT WOS:000274284200005
ER
PT B
AU Mihigo, JP
Malloy, DJ
Vining, CR
McNiel, CM
Kidman, DS
Stevens, CA
Monaco, JF
AF Mihigo, Jean Paul
Malloy, Donald J.
Vining, Charles R.
McNiel, Charles M.
Kidman, David S.
Stevens, Craig A.
Monaco, Jeffrey F.
GP ASME
TI THE NEED TO ADDRESS AEROMECHANICAL T&E REQUIREMENTS DURING ENGINE INLET
DISTORTION TESTING
SO PROCEEDINGS OF THE ASME TURBO EXPO 2009, VOL 1
LA English
DT Proceedings Paper
CT 54th ASME Turbo Expo 2009
CY JUN 08-12, 2009
CL Orlando, FL
SP ASME, Int Gas Turbine Inst
AB The need to address aeromechanical measurement requirements to fully characterize the impact of engine inlet distortion on the aeromechanical response of turbine engine fan blades is highlighted. Vibratory responses of a turbine engine fan with two distortion patterns are analyzed and compared. Fourier analysis is used to characterize the harmonic content of the vibration through amplitude coefficients associated with engine order. The effect of varying the number and orientation of the pressure distortion rake measurements is also analyzed. The key point presented, which ultimately has implications on the test procedures and the interpretation of the results, is that the number of rakes in the measurement array must be sufficient to accurately resolve the spatial distortion data into per-rev excitation amplitudes.
C1 [Mihigo, Jean Paul; Malloy, Donald J.] Aerosp Testing Alliance, Integrated Test & Evaluat Dept, Arnold AFB, TN 37389 USA.
RP Mihigo, JP (reprint author), Aerosp Testing Alliance, Integrated Test & Evaluat Dept, 877 Hap Arnold Dr, Arnold AFB, TN 37389 USA.
EM jean.mihigo@arnold.af.mil
NR 8
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4882-1
PY 2009
BP 1
EP 11
PG 11
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA BON15
UT WOS:000277052900001
ER
PT B
AU Anderson, WS
Polanka, MD
Zelina, J
Evans, DS
Stouffer, SD
Justinger, GR
AF Anderson, Wesly S.
Polanka, Marc D.
Zelina, Joseph
Evans, Dave S.
Stouffer, Scott D.
Justinger, Garth R.
GP ASME
TI EFFECTS OF A REACTING CROSS-STREAM ON TURBINE FILM COOLING
SO PROCEEDINGS OF THE ASME TURBO EXPO 2009, VOL 3, PTS A AND B
LA English
DT Proceedings Paper
CT 54th ASME Turbo Expo 2009
CY JUN 08-12, 2009
CL Orlando, FL
SP ASME, Int Gas Turbine Inst
AB Film cooling plays a critical role in providing effective thermal protection to components in modern gas turbine engines. A significant effort has been undertaken over the last 40 years to improve the distribution of coolant and to ensure that the airfoil is protected by this coolant from the hot gases in the freestream. This film, under conditions with high fuel air ratios, may actually be detrimental to the underlying metal. The presence of unburned fuel from an upstream combustor may interact with this oxygen rich film coolant jet resulting in secondary combustion. The completion of the reactions can increase the gas temperature locally resulting in higher heat transfer to the airfoil directly along the path line of the film coolant jet. This secondary combustion could damage the turbine blade, resulting in costly repair, reduction in turbine life, or even engine failure. However, knowledge of film cooling in a reactive flow is very limited. The current study explores the interaction of cooling flow from typical cooling holes with the exhaust of a fuel-rich well-stirred reactor operating at high temperatures over a flat plate. Surface temperatures, heat flux, and heat transfer coefficients are calculated for a variety of reactor fuel-to-air ratios, cooling hole geometries, and blowing ratios. Emphasis is placed on the difference between a normal cylindrical hole, an inclined cylindrical hole, and a fan shaped cooling hole. When both air and nitrogen are injected through the cooling holes, the changes in surface temperature can be directly correlated to the presence of the reaction. Photographs of the localized burning are presented to verify the extent and locations of the reaction.
C1 [Anderson, Wesly S.; Polanka, Marc D.; Zelina, Joseph] USAF, Res Lab, Prop Directorate, Dayton, OH USA.
RP Anderson, WS (reprint author), USAF, Res Lab, Prop Directorate, Dayton, OH USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4884-5
PY 2009
BP 1345
EP 1353
PG 9
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA BON21
UT WOS:000277056900118
ER
PT J
AU Roquemore, WM
Katta, V
Stouffer, S
Belovich, V
Pawlik, R
Arstingstall, M
Justinger, G
Gord, J
Lynch, A
Zelina, J
Roy, S
AF Roquemore, W. M.
Katta, V.
Stouffer, S.
Belovich, V.
Pawlik, R.
Arstingstall, M.
Justinger, G.
Gord, J.
Lynch, A.
Zelina, J.
Roy, S.
TI Soot studies of laminar diffusion flames with recirculation zones
SO PROCEEDINGS OF THE COMBUSTION INSTITUTE
LA English
DT Article
DE Soot; Recirculation zone; Flame structure; Centerbody; Laminar-flow
ID BODY STABILIZED FLAME; BLUFF; COMBUSTION; CHEMISTRY
AB This paper describes the unusual sooting structure of three flames established by the laminar recirculation zones of a centerbody burner. The vertically mounted burner consists of an annular air jet and a central fuel jet separated by a bluff-body. The three ethylene fueled-flames are identified as: fully sooting, donut-shape, and ring-shape sooting flames. Different shapes of the soot structures are obtained by varying the N(2) dilution in the fuel and air jets while maintaining a constant air and fuel velocity of 1.2 m/s. All three flames have the unusual characteristic that the soot, entrained into the recirculation zone, follows discrete spiral trajectories that terminate at the center of the vortex. The questions are what cause: (1) the unusual sooting structures and (2) the spiral trajectories of the soot? Flame photographs, laser sheet visualizations, and calculations with a 2D CFD-based code (UNICORN) are used to answer these questions. The different sooting structures are related to the spiral,,transport of the soot, the spatial location of the stoichiometric flame surface with respect to the vortex center, and the burnout of the soot particles. Computations indicate that the spiral trajectories of the soot particles are due to thermophoresis. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Roquemore, W. M.; Belovich, V.; Pawlik, R.; Gord, J.; Lynch, A.; Zelina, J.] USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
[Stouffer, S.; Arstingstall, M.; Justinger, G.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Katta, V.; Roy, S.] ISSI, Dayton, OH 45440 USA.
RP Roquemore, WM (reprint author), USAF, Res Lab, Prop Directorate, AFRL RZTC BLDG 490,1950 5th St, Wright Patterson AFB, OH 45433 USA.
EM william.roquemore@wpafb.af.mil
FU SERDP; Air Force Research Laboratory
FX The authors acknowledge the financial support of Bruce Sartwell of the
SERDP program office and the Turbine Engine Division of the Propulsion
Directorate of the Air Force Research Laboratory. We also appreciate the
work of Kyle Frische and Keith Grinstead, Jr., on the camera and
laser-interface electronics; Jack Yoder for the illustration of the
experimental set-tip; and Jennifer James for editorial assistance.
NR 26
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PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1540-7489
J9 P COMBUST INST
JI Proc. Combust. Inst.
PY 2009
VL 32
BP 729
EP 736
DI 10.1016/j.proci.2008.06.104
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering,
Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 427CG
UT WOS:000264756800081
ER
PT J
AU Rieker, GB
Jeffries, JB
Hanson, RK
Mathur, T
Gruber, MR
Carter, CD
AF Rieker, G. B.
Jeffries, J. B.
Hanson, R. K.
Mathur, T.
Gruber, M. R.
Carter, C. D.
TI Diode laser-based detection of combustor instabilities with application
to a scramjet engine
SO PROCEEDINGS OF THE COMBUSTION INSTITUTE
LA English
DT Article
DE Scramjet; Instability; Unstart; Combustor; Sensor
ID SWIRL-STABILIZED COMBUSTOR; TEMPERATURE DISTRIBUTIONS; ABSORPTION
SENSOR; LEAN BLOWOUT; SPECTROSCOPY; OSCILLATIONS; INLET
AB Fluctuations in temperature non-uniformity along the line-of-sight of a diode laser absorption sensor in a model scramjet are found to precede backpressure-induced unstart (expulsion of the isolator shock train). A novel detection strategy combining Fourier analysis of temperature time series to determine low-frequency heat release fluctuations with simultaneous measurements of multiple absorption features of H2O to identify temperature non-uniformities was applied-to the scramjet combustor. Time-resolved absorption is measured using wavelength modulation spectroscopy for three transitions chosen with different tempera tu re-dependent absorption characteristics. The line-of-sight (LOS)-averaged temperature inferred from the ratio of absorption from one pair of transitions is highly sensitive to low-temperature non-uniformities along the absorption path while the other ratio is less sensitive. The fraction of fluctuations in the range 1 < f < 50 Hz is determined from short-time Fourier transforms (STFTs) of the measured temperatures from both transition pairs. The ratio of these fractions provides a robust measure of the low-frequency fluctuations in temperature non-uniformities in the flow. Measurements in a scramjet test rig indicate a distinct increase in low-frequency fluctuations of low-temperature gases several seconds before the isolator shock train is forced out of the inlet by heat addition to the combustor. Though the precise cause of the fluctuations remains unknown, the detection method shows promise for use in control schemes to avoid back pressure-induced unstarts. (c) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Rieker, G. B.; Jeffries, J. B.; Hanson, R. K.] Stanford Univ, Dept Mech Engn, High Temp Gasdynam Lab, Stanford, CA 94305 USA.
[Mathur, T.] Innovat Sci Solut Inc, Dayton, OH 45440 USA.
[Gruber, M. R.; Carter, C. D.] USAF, Res Lab, RZAS, Dayton, OH 45433 USA.
RP Rieker, GB (reprint author), Stanford Univ, Dept Mech Engn, High Temp Gasdynam Lab, Stanford, CA 94305 USA.
EM grieker@stanfordalumni.org
FU Air Force Office of Scientific Research
FX This research was sponsored by the Air Force Office of Scientific
Research, Aerospace and Materials Science Directorate, with Julian
Tishkoff as technical monitor. The authors thank Andrew Fahrland and
Andree Houle for help conducting experiments at AFRL. Document WPAFB
07-0554, approved for public release: distribution unlimited.
NR 24
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PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1540-7489
EI 1873-2704
J9 P COMBUST INST
JI Proc. Combust. Inst.
PY 2009
VL 32
BP 831
EP 838
DI 10.1016/j.proci.2008.06.114
PN 1
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering,
Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 427CG
UT WOS:000264756800093
ER
PT J
AU Katta, VR
Roquemore, WA
Gord, J
AF Katta, Viswanath. R.
Roquemore, William A.
Gord, James
TI Examination of laminar-flamelet concept using vortex/flame interactions
SO PROCEEDINGS OF THE COMBUSTION INSTITUTE
LA English
DT Article
DE Flamelet theory; Vortex/flame interaction; Micro-vortex; Non-premixed
flame; Extinction
ID JET DIFFUSION FLAMES; COMBUSTION; UNSTEADY; MODELS
AB The laminar-flamelet concept for turbulent non-premixed combustion is examined through a study of vortex/flame interactions in a hydrogen/air, opposing-jet non-premixed flame. Vortices with sizes ranging from centimeter to sub-millimeter are injected toward the flame surface. The vortex-injection velocity is selected such that every interaction results in (1) flame extinction and (2) the ratio between the vortex-turnaround and the chemical time scales falling in the laminar-flamelet regime of turbulent combustion. The dynamic changes that occur to the flame structure during its interaction with the vortex are mapped onto a scalar-dissipation-rate scale. It is found that not only the scalar-dissipation rate but also the size of the vortex (eddy) is required for describing the flame-stretching process. The large centimeter-size vortex, irrespective of the propagation velocity, wrinkles and strains the flame before causing local extinction, which represents typical laminar-flamelet behavior. On the other hand, the small sub-millimeter-size vortex replaces the local fluid in the flame zone with fresh air and destroys the flame structure without causing any wrinkling or stretching of the reaction zone, which represents non-flamelet behavior. Interactions with millimeter-size vortices are found to deviate gradually from the flamelet behavior as the vortex size decreases, Vortex/flame interactions that do not follow laminar-flamelet behavior produce very high heat-release rates that are not observed in stretched planar flames. Similar deviations from flamelet behavior are observed in methane and ethylene flames. Since turbulent eddies are two to three orders of magnitude smaller than a millimeter-size vortex, caution must be exercised when applying laminar-flamelet theory to turbulent-combustion modeling. (c) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Katta, Viswanath. R.] Innovat Sci Solut Inc, Dayton, OH 45440 USA.
[Roquemore, William A.; Gord, James] USAF, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
RP Katta, VR (reprint author), Innovat Sci Solut Inc, 2766 Indian Ripple Rd, Dayton, OH 45440 USA.
EM vrkatta@crinet.com
FU Air Force Office of Scientific Research AFOSR [F33615-00-C-2068]
FX Financial support for this work was provided by the Air Force Office of
Scientific Research (AFOSR, Dr. Julian Tishkof) and Air Force Contract
No. F33615-00-C-2068 (Dr. Vincent Belovich). The authors thank Ms.
Marian Whitaker for editorial help.
NR 27
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U2 9
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1540-7489
J9 P COMBUST INST
JI Proc. Combust. Inst.
PY 2009
VL 32
BP 1019
EP 1026
DI 10.1016/j.proci.2008.07.013
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering,
Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 427CG
UT WOS:000264756800116
ER
PT J
AU Katta, VR
Roquemore, WM
Menon, A
Lee, SY
Santoro, RJ
Litzinger, TA
AF Katta, Viswanath R.
Roquemore, William M.
Menon, Arvind
Lee, Seong-Young
Santoro, Robert J.
Litzinger, Thomas A.
TI Impact of soot on flame flicker
SO PROCEEDINGS OF THE COMBUSTION INSTITUTE
LA English
DT Article
DE Diffusion flame; Flicker; Buoyancy; Soot; Radiation
ID JET DIFFUSION FLAMES; ETHYLENE
AB The impetus for the present study is a perceived anomaly in which. a vertically mounted ethylene jet diffusion flame used to study soot is observed to be steady; whereas similar flames used in other studies have been observed to flicker or oscillate at a frequency of about 12 Hz. This difference raises a question as to why the sooting flame is steady. A well-validated, Navier-Stokes-based, time-dependent numerical code is used to provide an answer to this question. A prediction is made, and later confirmed by experiments, of a phenomenon that is new to the authors and perhaps to the combustion community. That is, soot radiation can influence flame flicker resulting from a buoyancy-induced instability to such a point that the oscillation is completely suppressed. Experiments are used to validate the prediction and the result of numerical studies of the impact of soot oil flame flicker. It is found that in a jet diffusion flame, the magnitude of flame oscillations (flicker.) decreases with the amount of soot generated in the flame; however, the frequency of the oscillations does not change. Good agreement is obtained between measurements and computations for the dynamic behavior of flames with different soot levels. Both experiments and calculations yield a steady flame when the generated soot is sufficiently high and then produce the initial dynamic flame when the soot formation is restricted. The impact of soot on flame flicker is further studied by performing a simulation for the sooty flame after neglecting radiation from soot. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Katta, Viswanath R.] Innovat Sci Solut Inc, Dayton, OH 45440 USA.
[Roquemore, William M.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Menon, Arvind; Lee, Seong-Young; Santoro, Robert J.; Litzinger, Thomas A.] Penn State Univ, University Pk, PA 16802 USA.
RP Katta, VR (reprint author), Innovat Sci Solut Inc, 2766 Indian Ripple Rd, Dayton, OH 45440 USA.
EM vrkatta@erinet.com
FU Air Force [F33615-00-C-2068]
FX Financial support for this work was provided by the Strategic
Environmental Research and Development Program (SERDP, Bruce Sartwell)
and Air Force Contract No. F33615-00-C-2068 (Vince Belovich). The
authors appreciate the editorial comments of Ms. Marian Whitaker.
NR 20
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U1 1
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PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1540-7489
J9 P COMBUST INST
JI Proc. Combust. Inst.
PY 2009
VL 32
BP 1343
EP 1350
DI 10.1016/j.proci.2008.06.152
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering,
Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 427CG
UT WOS:000264756800155
ER
PT J
AU Ryan, M
Gruber, M
Carter, C
Mathur, T
AF Ryan, Michael
Gruber, Mark
Carter, Campbell
Mathur, Tarun
TI Planar laser-induced fluorescence imaging of OH in a supersonic
combustor fueled with ethylene and methane
SO PROCEEDINGS OF THE COMBUSTION INSTITUTE
LA English
DT Article
DE Scramjet; Supersonic combustion; OH PLIF; Combustor performance;
Flameholding
ID PERFORMANCE; INJECTION
AB A supersonic combustor was experimentally investigated using both conventional instrumentation and laser-based diagnostics. Planar laser-induced fluorescence (PLIF) imaging of OH was used in the main section of the combustor to examine flameholding and flame propagation during it series of evaluations at conditions Simulating Mach-5.5 flight. Parameters of interest in this Study included the angle of the primary fuel injectors, the distribution of fuel throughout the combustor, and the fuel composition. Changes in fuel-injection angle were expected to influence the mixing and combustion processes. and therefore combustor operation. Fuel-distribution variations were expected to modify the flame propagation between flameholding regions. Finally, ethylene and methane were used to examine the suitability of the flameholder designs over a wide range of fuel reactivity. Results suggest that the combustor provides relatively robust flameholding regardless of the fuel used and good flame propagation as long its the fuel distribution provides favorable conditions in the flameholding regions. In addition, the results show that the primary injectors can be useful in controlling certain aspects of combustor operability. (C) 2009 Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Ryan, Michael] Universal Technol Corp, Dayton, OH 45432 USA.
[Gruber, Mark; Carter, Campbell] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Mathur, Tarun] Innovat Sci Solut Inc, Dayton, OH 45440 USA.
RP Ryan, M (reprint author), Pratt & Whitney Rocketdyne W Palm Beach,MS 715-83, W Palm Beach, FL 33410 USA.
EM Michael.Ryan3@wpafb.af.mil
FU Advanced Propulsion Technology Program; Air Force Office of Scientific
Research; AFRL/RZ Research Air Facility
FX This work was supported by the Advanced Propulsion Technology Program
under the guidance of Robert Mercier and by the Air Force Office of
Scientific Research under the guidance of Julian Tishkoff. The authors
acknowledge the technical contributions of Stephen Smith of AFRL/RZA and
Charles Smith, William Haendiges, Richard Ryman, and Jacob Diemer of
Innovative Scientific Solutions, Inc. The support of the AFRL/RZ
Research Air Facility is also appreciated.
NR 22
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U1 1
U2 12
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1540-7489
J9 P COMBUST INST
JI Proc. Combust. Inst.
PY 2009
VL 32
BP 2429
EP 2436
DI 10.1016/j.proci.2008.06.209
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering,
Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 427CH
UT WOS:000264756900095
ER
PT S
AU Coutu, RA
McBride, JW
Starman, LA
AF Coutu, Ronald A., Jr.
McBride, John W.
Starman, LaVern A.
GP IEEE
TI Improved Micro-Contact Resistance Model that considers Material
Deformation, Electron Transport and Thin Film Characteristics
SO PROCEEDINGS OF THE FIFTY-FIFTH IEEE HOLM CONFERENCE ON ELECTRICAL
CONTACTS
SE Electrical Contacts-IEEE Holm Conference on Electrical Contacts
LA English
DT Proceedings Paper
CT 55th IEEE Holm Conference on Electrical Contacts
CY SEP 14-16, 2009
CL Vancouver, CANADA
SP IEEE CPMT
DE micro-contacts; contact resistance; thin film
ID SIZE
AB This paper reports on an improved analytic model for predicting micro-contact resistance needed for designing micro-electro-mechanical systems (MEMS) switches. The original model had two primary considerations: 1) contact material deformation (i.e. elastic, plastic, or elastic-plastic) and 2) effective contact area radius. The model also assumed that individual a-spots were close together and that their interactions were dependent on each other which led to using the single effective a-spot contact area model. This single effective area model was used to determine specific electron transport regions (i.e. ballistic, quasi-ballistic, or diffusive) by comparing the effective radius and the mean free path of an electron. Using this model required that micro-switch contact materials be deposited, during device fabrication, with processes ensuring low surface roughness values (i.e. sputtered films). Sputtered thin film electric contacts, however, do not behave like bulk materials and the effects of thin film contacts and spreading resistance must be considered. The improved micro-contact resistance model accounts for the two primary considerations above, as well as, using thin film, sputtered, electric contacts.
C1 [Coutu, Ronald A., Jr.; Starman, LaVern A.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[McBride, John W.] Univ Southampton, Sch Engn Sci, Southampton, Hants, England.
RP Coutu, RA (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM Ronald.Coutu@afit.edu
NR 14
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-6808
BN 978-1-4244-3611-8
J9 ELECTR CONTACT
PY 2009
BP 295
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BPB80
UT WOS:000278479300046
ER
PT S
AU Genelin, CL
Ruggles-Wrenn, MB
AF Genelin, C. L.
Ruggles-Wrenn, M. B.
BE Bansal, NP
Singh, JP
TI EFFECTS OF ENVIRONMENT ON CREEP BEHAVIOR OF NEXTEL (TM)
720/ALUMINA-MULLITE CERAMIC COMPOSITE AT 1200 degrees C
SO PROCESSING AND PROPERTIES OF ADVANCED CERAMICS AND COMPOSITES
SE Ceramic Transactions
LA English
DT Proceedings Paper
CT Materials Science and Technology Conference and Exhibition (MS&T 08)
CY OCT 05-09, 2008
CL Pittsburgh, PA
ID BRITTLE-MATRIX COMPOSITES; HIGH-TEMPERATURE; MECHANICAL-PROPERTIES;
COATING CONCEPTS; DAMAGE-TOLERANT; SILICON-CARBIDE; POROUS-MATRIX;
WATER-VAPOR; OXIDATION; EMBRITTLEMENT
AB The tensile creep behavior of an oxide oxide continuous fiber ceramic composite was investigated at 1200 degrees C in laboratory air in steam and in argon The composite consists of a porous alumina mullite matrix reinforced with laminated woven mullite/alumina (Nextel (TM) 720) fibers has no interface between the fiber and matrix and relies on the porous matrix for flaw tolerance The tensile stress strain behavior was investigated and the tensile properties measured at 1200 degrees C The elastic modulus was 74 5 GPa and the ultimate tensile strength was 153 MPa Tensile creep behavior was examined for creep stresses in the 70 140 MPa range Primary and secondary creep regimes were observed in all tests Creep run-out (set to 100 h) was achieved in laboratory air for creep stress levels <= 90 MPa The presence of either steam or argon accelerated creep rates and reduced creep lifetimes Composite microstructure as well as damage and failure mechanisms were investigated
C1 [Genelin, C. L.; Ruggles-Wrenn, M. B.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Genelin, CL (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 46
TC 0
Z9 0
U1 0
U2 0
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 1042-1122
BN 978-0-470-40845-2
J9 CERAM TRANS
PY 2009
VL 203
BP 193
EP 203
DI 10.1002/9780470522189.ch18
PG 11
WC Materials Science, Ceramics; Materials Science, Composites
SC Materials Science
GA BSU33
UT WOS:000285825100018
ER
PT S
AU Tomczak, SJ
Wright, ME
Guenthner, AJ
Pettys, BJ
Brunsvold, AL
Knight, C
Minton, TK
Vij, V
McGrath, LM
Mabry, JM
AF Tomczak, Sandra J.
Wright, Michael E.
Guenthner, Andrew J.
Pettys, Brian J.
Brunsvold, Amy L.
Knight, Casey
Minton, Timothy K.
Vij, Vandana
McGrath, Laura M.
Mabry, Joseph M.
BE Kleiman, JI
TI Space Survivability of Main-Chain and Side-Chain POSS-Kapton Polyimides
SO PROTECTION OF MATERIALS AND STRUCTURES FROM SPACE ENVIRONMENT
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 9th International Conference on Protection of Materials and Structures
from Space Environment
CY MAY 20-23, 2008
CL Toronto, CANADA
SP Canadian Space Agcy, Montana State Univ, Univ Toronto Inst Aerospac Studies, Integr Testing Lab
DE Hyperthermal atomic oxygen; polyimide; polyhedral oligomeric
silsesquioxane; POSS; space environment; polymer erosion; low Earth
orbit
ID ATOMIC OXYGEN-RESISTANT; COPOLYMERS; EROSION
AB Kapton (R) polyimde (PI) is extensively used in solar arrays, spacecraft thermal blankets, and space inflatable structures. Upon exposure to atomic oxygen (AO) in low Earth orbit (LEO), Kapton (R) is severely degraded. An effective approach to prevent this erosion is chemically bonding polyhedral oligomeric silsesquioxane (POSS) into the polyimide matrix by copolymerization of POSS-diamine with the polyimide monomers. POSS is a silicon and oxygen cage-like structure surrounded by organic groups and can be polymerizable. The copolymerization of POSS provides Si and 0 in the polymer matrix on the nano level. During POSS polyimide exposure to atomic oxygen, organic material is degraded and a silica passivation layer is formed. This silica layer protects the underlying polymer from further degradation. Ground-based studies and MISSE-1 and MISSE-5 flight results have shown that POSS polyimides are resistant to atomic-oxygen attack in LEO. In fact, 3.5 wt% Si8O11 main-chain POSS polyimide eroded about 2 mu m during the 3.9 year flight in LEO, whereas 32 mu m of 0 wt% POSS polyimide would have eroded within 4 mos. The atomic-oxygen exposure of main-chain POSS polyimides and new side-chain POSS polyimides has shown that copolymerized POSS imparts similar AO resistance to polyimide materials regardless of POSS monomer structure.
C1 [Tomczak, Sandra J.; Mabry, Joseph M.] USAF, AFRL RZSM, Mat Applicat Branch, Res Lab, 10 E Saturn Blvd,Bldg 8451, Edwards Afb, CA 93524 USA.
[Vij, Vandana; McGrath, Laura M.] USAF, ERC Inc, Mat Applicat Branch, Res Lab, Edwards Afb, CA 93524 USA.
[Wright, Michael E.; Guenthner, Andrew J.; Pettys, Brian J.] US Navy, NAVAIR, Dept Res & Engn Sci, Div Chem, China Lake, CA 93555 USA.
[Brunsvold, Amy L.; Knight, Casey; Minton, Timothy K.] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
RP Tomczak, SJ (reprint author), USAF, AFRL RZSM, Mat Applicat Branch, Res Lab, 10 E Saturn Blvd,Bldg 8451, Edwards Afb, CA 93524 USA.
RI Brunsvold, Amy/H-4315-2016
OI Brunsvold, Amy/0000-0001-9257-2978
NR 34
TC 3
Z9 3
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0619-3
J9 AIP CONF PROC
PY 2009
VL 1087
BP 505
EP +
PG 4
WC Engineering, Aerospace
SC Engineering
GA BIX44
UT WOS:000263582700044
ER
PT J
AU McLachlan, GD
Slocik, J
Mantz, R
Kaplan, D
Cahill, S
Girvin, M
Greenbaum, S
AF McLachlan, Glendon D.
Slocik, Joseph
Mantz, Robert
Kaplan, David
Cahill, Sean
Girvin, Mark
Greenbaum, Steve
TI High-resolution NMR characterization of a spider-silk mimetic composed
of 15 tandem repeats and a CRGD motif
SO PROTEIN SCIENCE
LA English
DT Article
DE multidimensional NMR; circular dichroism (CD); nuclear overhauser effect
(NOE); hexafluoro-isopropanol (HFIP); silk mimetic
ID TRIPLE-RESONANCE NMR; ALANINE-BASED PEPTIDES; SIDE-CHAIN RESONANCES;
BOMBYX-MORI FIBROIN; DRAGLINE SILK; CHEMICAL-SHIFTS; C-13 NMR;
STRUCTURAL-CHARACTERIZATION; RAMAN-SPECTROSCOPY; BACKBONE AMIDE
AB Multidimensional solution NMR spectroscopic techniques have been used to obtain atomic level information about a recombinant spider silk construct in hexafluoro-isopropanol (HFIP). The synthetic 49 kDa silk-like protein mimics authentic silk from Nephila clavipes, with the inclusion of an extracellular matrix recognition motif. 2D (1)H-(15)N HSQC NMR spectroscopy reveals 33 cross peaks, which were assigned to amino acid residues in the semicrystalline repeat units. Signals from the amorphous segments in the primary sequence were weak and broad, suggesting that this region is highly dynamic and undergoing conformational exchange. An analysis of the deviations of the (13)C(alpha), (13)C(beta), and (13)CO chemical shifts relative to the expected random coil values reveals two highly alpha-helical regions from amino acid 12-19 and 26-32, which comprise the polyalanine track and a GGLGSQ sequence. This finding is further supported by phi-value analysis and sequential and medium-range NOE interactions. Pulsed field gradient NMR measurements indicate that the topology of the silk mimetic in HFIP is nonglobular. Moreover, the 3D (15)N-NOESY HSQC spectrum exhibits few long-range NOEs. Similar spectral features have been observed for repeat modules in other polypeptides and are characteristic of an elongated conformation. The results provide a residue-specific description of a silk sequence in nonaqueous solution and may be insightful for understanding the fold and topology of highly concentrated, stable silk before spinning. Additionally, the insights obtained may find application in future design and large-scale production and storage of synthetic silks in organic solvents.
C1 [McLachlan, Glendon D.; Greenbaum, Steve] CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10065 USA.
[Slocik, Joseph; Mantz, Robert] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kaplan, David] Tufts Univ, Bioengn & Biotechnol Ctr, Dept Biomed Engn Chem & Biol Engn, Medford, MA 02155 USA.
[Cahill, Sean; Girvin, Mark] Albert Einstein Coll Med, Dept Biochem, Bronx, NY 10461 USA.
RP McLachlan, GD (reprint author), CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10065 USA.
EM gmclachl@hunter.cuny.edu
FU Air Force Office of Scientific Research; National Institutes of Health
[NCRR-RR03037]; AFOSR
FX The authors are grateful to Dr. Yujia Xu for use of the circular
dichroism spectropolarimeter in the department of chemistry at Hunter
College CUNY. The work at Hunter College was supported by a grant from
the Air Force Office of Scientific Research and an infrastructure grant
from the National Institutes of Health (NCRR-RR03037).; AFOSR.
NR 71
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U1 0
U2 12
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0961-8368
J9 PROTEIN SCI
JI Protein Sci.
PD JAN
PY 2009
VL 18
IS 1
BP 206
EP 216
DI 10.1002/pro.12
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 396TI
UT WOS:000262613700021
PM 19177364
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Psychosocial Adaptation in Pregnancy: Assessment of Seven Dimensions of
Maternal Development
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID CORTICOTROPIN-RELEASING HORMONE; INFANT BIRTH-WEIGHT; INTRAUTERINE
GROWTH-RETARDATION; SOCIAL SUPPORT; PRETERM DELIVERY; GESTATIONAL-AGE;
PRENATAL STRESS; LIFE EVENTS; NEUROMOTOR DEVELOPMENT; POSTPARTUM
DEPRESSION
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 132
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 1
EP 38
DI 10.1007/978-1-4419-0288-7_1
D2 10.1007/978-1-4419-0288-7
PG 38
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400001
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Acceptance of Pregnancy
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID PSYCHOSOCIAL FACTORS; SOMATIC SYMPTOMS; WOMEN; BIRTH; STRESS;
EXPERIENCE; PREDICTORS; REJECTION; ATTITUDES; HEALTH
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 43
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 39
EP 56
DI 10.1007/978-1-4419-0288-7_2
D2 10.1007/978-1-4419-0288-7
PG 18
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400002
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Identification with a Motherhood Role
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID MATERNAL-FETAL ATTACHMENT; PREGNANT-WOMEN; PSYCHOLOGICAL-FACTORS;
PRENATAL ATTACHMENT; HEALTH PRACTICES; TRANSITION; CHILD;
REPRESENTATIONS; ASSOCIATIONS; ADAPTATION
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 65
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 57
EP 86
DI 10.1007/978-1-4419-0288-7_3
D2 10.1007/978-1-4419-0288-7
PG 30
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400003
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Relationship with Mother
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID MATERNAL ROLE; PREGNANCY; ATTACHMENT; TRANSMISSION; ATTAINMENT;
PROGRESS; LABOR
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 27
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 87
EP 101
DI 10.1007/978-1-4419-0288-7_4
D2 10.1007/978-1-4419-0288-7
PG 15
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400004
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Relationship with Husband or Partner
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID EXPECTANT FATHERS; BIRTH-WEIGHT; PSYCHOSOCIAL FACTORS; CLINIC
POPULATION; SOCIAL SUPPORT; PREGNANCY; PARENTHOOD; TRANSITION; STRESS;
LABOR
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 94
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 103
EP 138
DI 10.1007/978-1-4419-0288-7_5
D2 10.1007/978-1-4419-0288-7
PG 36
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400005
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Preparation for Labor
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID MATERNAL ROLE; CHILDBIRTH; PREGNANCY; BIRTH; WOMEN; EXPERIENCES;
ATTAINMENT; MOTHERS
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 30
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 139
EP 165
DI 10.1007/978-1-4419-0288-7_6
D2 10.1007/978-1-4419-0288-7
PG 27
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400006
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Prenatal Fear of Pain, Helplessness, and Loss of Control in Labor
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID EPIDURAL ANALGESIA; CHILDBIRTH; BIRTH; WOMEN; EXPERIENCE; ANXIETY;
ADAPTATION; PREDICTORS; PREGNANCY; LOCUS
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 46
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 167
EP 190
DI 10.1007/978-1-4419-0288-7_7
D2 10.1007/978-1-4419-0288-7
PG 24
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400007
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Prenatal Fear of Loss of Self-Esteem in Labor
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID ADULT ATTACHMENT; PREGNANCY; RESOURCES; PROGRESS; WOMEN
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 24
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 191
EP 202
DI 10.1007/978-1-4419-0288-7_8
D2 10.1007/978-1-4419-0288-7
PG 12
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400008
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Prenatal and Postnatal Psychosocial Adaptation in Military Women
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID SOCIAL SUPPORT; MATERNAL ADAPTATION; CIRCUMPLEX MODEL; FAMILY-STRUCTURE;
ROLE ATTAINMENT; PREGNANT-WOMEN; BIRTH-WEIGHT; ATTACHMENT; MOTHERHOOD;
POSTPARTUM
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 77
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 203
EP 227
DI 10.1007/978-1-4419-0288-7_9
D2 10.1007/978-1-4419-0288-7
PG 25
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400009
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Prenatal Adaptation Among Multigravidas
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID SOCIAL SUPPORT; PREGNANT-WOMEN; TRANSITION; STRESS; LABOR; CHILDBIRTH;
EXPERIENCE; PARENTHOOD; PAIN; EXPECTATIONS
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 55
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 229
EP 261
DI 10.1007/978-1-4419-0288-7_10
D2 10.1007/978-1-4419-0288-7
PG 33
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400010
ER
PT B
AU Lederman, R
Weis, K
AF Lederman, Regina
Weis, Karen
BA Lederman, R
Weis, K
BF Lederman, R
Weis, K
TI Methods of Assessment: Psychosocial Adaptation to Pregnancy
Questionnaire Scales and Interview Schedules, and Review of
Interventions to Enhance Adaptation
SO PSYCHOSOCIAL ADAPTATION TO PREGNANCY: SEVEN DIMENSIONS OF MATERNAL ROLE
DEVELOPMENT, THIRD EDITION
LA English
DT Article; Book Chapter
ID LOW-BIRTH-WEIGHT; RANDOMIZED CONTROLLED-TRIAL; SOCIAL SUPPORT; PRENATAL
DEPRESSION; AFRICAN-AMERICAN; HOME VISITATION; WOMEN; LABOR; ANXIETY;
STRESS
C1 [Lederman, Regina] Univ Texas Galveston, Galveston, TX 77555 USA.
[Weis, Karen] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
RP Lederman, R (reprint author), Univ Texas Galveston, Galveston, TX 77555 USA.
EM rlederma@utmb.edu; karen.weis@us.AF.MIL; rlederma@utmb.edu;
karen.weis@us.AF.MIL
NR 90
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4419-0287-0
PY 2009
BP 263
EP 298
DI 10.1007/978-1-4419-0288-7_11
D2 10.1007/978-1-4419-0288-7
PG 36
WC Psychology, Clinical
SC Psychology
GA BLJ35
UT WOS:000270301400011
ER
PT J
AU Carey, SJ
Noriega-Crespo, A
Mizuno, DR
Shenoy, S
Paladini, R
Kraemer, KE
Price, SD
Flagey, N
Ryan, E
Ingalls, JG
Kuchar, TA
Goncalves, DP
Indebetouw, R
Billot, N
Marleau, FR
Padgett, DL
Rebull, LM
Bressert, E
Ali, B
Molinari, S
Martin, PG
Berriman, GB
Boulanger, F
Latter, WB
Miville-Deschenes, MA
Shipman, R
Testi, L
AF Carey, S. J.
Noriega-Crespo, A.
Mizuno, D. R.
Shenoy, S.
Paladini, R.
Kraemer, K. E.
Price, S. D.
Flagey, N.
Ryan, E.
Ingalls, J. G.
Kuchar, T. A.
Goncalves, Daniela Pinheiro
Indebetouw, R.
Billot, N.
Marleau, F. R.
Padgett, D. L.
Rebull, L. M.
Bressert, E.
Ali, Babar
Molinari, S.
Martin, P. G.
Berriman, G. B.
Boulanger, F.
Latter, W. B.
Miville-Deschenes, M. A.
Shipman, R.
Testi, L.
TI MIPSGAL: A Survey of the Inner Galactic Plane at 24 and 70 mu m
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
LA English
DT Review
ID SPITZER-SPACE-TELESCOPE; INFRARED-DARK CLOUDS; H-II REGIONS;
APERTURE-SUBMILLIMETER-TELESCOPE; SPECTRAL IRRADIANCE CALIBRATION;
MULTIBAND IMAGING PHOTOMETER; TRIGGERED STAR-FORMATION;
SMALL-MAGELLANIC-CLOUD; YOUNG STELLAR OBJECTS; SUPERNOVA REMNANT
AB MIPSGAL is a 278 deg(2) survey of the inner Galactic plane using the Multiband Infrared Photometer for Spitzer aboard the Spitzer Space Telescope. The survey field was imaged in two passbands, 24 and 70 mu m with resolutions of 6 '' and 18 '', respectively. The survey was designed to provide a uniform, well-calibrated and well-characterized data set for general inquiry of the inner Galactic plane and as a longer-wavelength complement to the shorter-wavelength Spitzer survey of the Galactic plane: Galactic Plane Infrared Mapping Survey Extraordinaire. The primary science drivers of the current survey are to identify all high-mass (M > 5 M-circle dot) protostars in the inner Galactic disk and to probe the distribution, energetics, and properties of interstellar dust in the Galactic disk. The observations were planned to minimize data artifacts due to image latents at 24 mu m and to provide full coverage at 70 mu m. Observations at ecliptic latitudes within 15 of the ecliptic plane were taken at multiple epochs to help reject asteroids. The data for the survey were collected in three epochs, 2005 September-October, 2006 April, and 2006 October with all of the data available to the public. The estimated point-source sensitivities of the survey are 2 and 75 mJy (3 sigma) at 24 and 70 mu m, respectively. Additional data processing was needed to mitigate image artifacts due to bright sources at 24 mu m and detector responsivity variations at 70 mu m due to the large dynamic range of the Galactic plane. Enhanced data products including artifact-mitigated mosaics and point-source catalogs are being produced with the 24 mu m mosaics already publicly available from the NASA/IPAC Infrared Science Archive. Some preliminary results using the enhanced data products are described.
C1 [Carey, S. J.; Noriega-Crespo, A.; Shenoy, S.; Paladini, R.; Flagey, N.; Ryan, E.; Ingalls, J. G.; Marleau, F. R.; Padgett, D. L.; Rebull, L. M.] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Mizuno, D. R.; Kuchar, T. A.] Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
[Kraemer, K. E.; Price, S. D.] USAF, Res Lab, AFRL, RVBYB, Hanscom AFB, MA USA.
[Ryan, E.] Univ Minnesota, Dept Astron, Minneapolis, MN 55455 USA.
[Goncalves, Daniela Pinheiro; Martin, P. G.] Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada.
[Indebetouw, R.] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA.
[Billot, N.; Marleau, F. R.; Ali, Babar; Berriman, G. B.; Latter, W. B.] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA USA.
[Bressert, E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Molinari, S.] Ist Fis Spazio Interplanetario, I-00133 Rome, Italy.
[Boulanger, F.; Miville-Deschenes, M. A.] Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France.
[Shipman, R.] Univ Groningen, SRON Netherlands Inst Space Res, NL-9700 AV Groningen, Netherlands.
[Testi, L.] Arcetri Observ, I-50125 Florence, Italy.
RP Carey, SJ (reprint author), CALTECH, Spitzer Sci Ctr, MS 220-6, Pasadena, CA 91125 USA.
EM carey@ipac.caltech.edu
RI Molinari, Sergio/O-4095-2016;
OI Molinari, Sergio/0000-0002-9826-7525; Bressert, Eli/0000-0002-6564-6182
NR 106
TC 322
Z9 322
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-6280
EI 1538-3873
J9 PUBL ASTRON SOC PAC
JI Publ. Astron. Soc. Pac.
PD JAN
PY 2009
VL 121
IS 875
BP 76
EP 97
PG 22
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 404LF
UT WOS:000263152600010
ER
PT J
AU Simpson, JR
AF Simpson, James R.
TI Discussion of "Principles of Exploratory Data Analysis in Problem
Solving: What Can We Learn from a Well-Known Case?"
SO QUALITY ENGINEERING
LA English
DT Editorial Material
C1 [Simpson, James R.] USAF, Test Management Grp 53, Eglin AFB, FL 32542 USA.
[Simpson, James R.] Florida State Univ, Tallahassee, FL 32306 USA.
[Simpson, James R.] USAF Acad, Colorado Springs, CO USA.
RP Simpson, JR (reprint author), USAF, Test Management Grp 53, Eglin AFB, FL 32542 USA.
EM james.simpson@eglin.af.mil
NR 5
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0898-2112
J9 QUAL ENG
JI Qual. Eng.
PY 2009
VL 21
IS 4
BP 376
EP 379
DI 10.1080/08982110903188292
PG 4
WC Engineering, Industrial; Statistics & Probability
SC Engineering; Mathematics
GA V20UW
UT WOS:000208165900004
ER
PT S
AU Day, PN
Nguyen, KA
Pachter, R
AF Day, Paul N.
Nguyen, Kiet A.
Pachter, Ruth
BE Eyink, KG
Szmulowicz, F
Huffaker, DL
TI Modeling the optical properties of small gold nanoclusters using
time-dependent density functional theory
SO QUANTUM DOTS, PARTICLES, AND NANOCLUSTERS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Dots, Particles, and Nanoclusters VI
CY JAN 25-28, 2009
CL San Jose, CA
SP SPIE
DE gold clusters; time-dependent density functional theory; relativistic
effects; pseudopotential
ID CATALYTIC CO OXIDATION; CORRELATION-ENERGY; BASIS-SETS; CLUSTERS;
APPROXIMATION; POTENTIALS; SPECTRA; NANOPARTICLES; ABSORPTION; CHEMISTRY
AB The optical properties of gold nanoclusters of size 2 - 20 have been investigated using time-dependent density functional theory (TDDFT) to simulate their linear absorption spectra. Relativistic effects have been included by using pseudopotentials, with the Douglas-Kroll (DK) approximation, and with the zero-order regular approximation (ZORA). The improved model core potential with scaled relativistic effects (iMCP-SR2) used in combination with either the BP86, BLYP, or B3LYP exchange-correlation density functional was found to fairly accurately model the spectra of clusters for which measured spectra are available, although the all-electron ZORA method was best both for accuracy and computational efficiency. The effects on the optical properties of organic chromophores from coordination with small gold clusters were preliminarily studied. The extent of enhancement of the absorption properties is seen to depend on the size and structure of the gold cluster.
C1 [Day, Paul N.; Nguyen, Kiet A.; Pachter, Ruth] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Day, PN (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 41
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7470-4
J9 PROC SPIE
PY 2009
VL 7224
AR 722418
DI 10.1117/12.809150
PG 9
WC Nanoscience & Nanotechnology; Optics; Physics, Applied
SC Science & Technology - Other Topics; Optics; Physics
GA BST57
UT WOS:000285746200028
ER
PT S
AU Eyink, KG
Grazulis, L
Mahalingam, K
Shoaf, JR
AF Eyink, K. G.
Grazulis, L.
Mahalingam, K.
Shoaf, J. R.
BE Eyink, KG
Szmulowicz, F
Huffaker, DL
TI Morphological Change in Tip Based Nano-Patterned Planar InAs
SO QUANTUM DOTS, PARTICLES, AND NANOCLUSTERS VI
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Quantum Dots, Particles, and Nanoclusters VI
CY JAN 25-28, 2009
CL San Jose, CA
SP SPIE
ID STRAIN-RELAXATION; GROWTH; LAYERS; GAAS
AB The unique properties of quantum dots should allow enhanced or novel devices to be fabricated. However, the typical method of formation is to self-assemble quantum dots. This process causes quantum dots to have a distribution in properties such as size and to form at near random location. Since many of these possible devices require near exact positioning of the quantum dots with given sizes, most of these potential devices have been unrealized or exist in far from optimum conditions. In this work, we present a new method which is being examined for its potential to form uniform quantum dot structures. This technique is surface tension driven restructuring of a nano-patterned surface. In particular, we have formed a planar 5nm thick InAs film under metal rich conditions. The sample pattern was formed using a 3mg load measured with a Hysitron nano-indentor and maintained using STM scan electronics. The pattern consisted of a grid of 150 lines in x and y directions in nominal 9 mu m x 9 mu m square area. AFM analysis showed a series of lines which are spaced similar to 180 nm lines apart in the y direction and lines spaced similar to 60 nm and 120 nm in the x-direction. The patterned sample was annealed under a high As flux, near 5 x 10(-6) torr, after removal of the surface oxides. The resulting structure clearly shows the reorganization of the InAs in regions defined by the original patterning in AFM images. AFM analysis indicates large features with 80nm base width were formed.
C1 [Eyink, K. G.; Shoaf, J. R.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Eyink, KG (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 12
TC 2
Z9 2
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7470-4
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7224
AR 722408
DI 10.1117/12.810160
PG 6
WC Nanoscience & Nanotechnology; Optics; Physics, Applied
SC Science & Technology - Other Topics; Optics; Physics
GA BST57
UT WOS:000285746200004
ER
PT S
AU Nguyen, KA
Day, PN
Belosludov, RV
Kawazoe, Y
Pachter, R
AF Nguyen, Kiet A.
Day, Paul N.
Belosludov, Rodion V.
Kawazoe, Yoshiyuki
Pachter, Ruth
BE Eyink, KG
Szmulowicz, F
Huffaker, DL
TI One-Photon Spectra of CdSe Quantum Dots Calculated using Time-Dependent
Density Functional Theory
SO QUANTUM DOTS, PARTICLES, AND NANOCLUSTERS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Dots, Particles, and Nanoclusters VI
CY JAN 25-28, 2009
CL San Jose, CA
SP SPIE
DE Quantum dot; nanoparticle; Time-dependent density functional theory;
CdSe
ID EFFECTIVE CORE POTENTIALS; SEMICONDUCTOR NANOCRYSTALLITES; MOLECULAR
CALCULATIONS; EXCHANGE; BEHAVIOR; SIZE
AB We present calculations of one-photon absorption (OPA) spectra for (CdSe)(n) (up to n = 34) quantum dots, carried out using time-dependent density functional theory. The effects of cluster size on OPA spectra are discussed and compared with experiment to provide preliminary insights into the formation of stable clusters.
C1 [Nguyen, Kiet A.; Day, Paul N.; Pachter, Ruth] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Nguyen, KA (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 21
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7470-4
J9 PROC SPIE
PY 2009
VL 7224
AR 722410
DI 10.1117/12.808279
PG 7
WC Nanoscience & Nanotechnology; Optics; Physics, Applied
SC Science & Technology - Other Topics; Optics; Physics
GA BST57
UT WOS:000285746200021
ER
PT S
AU Yepez, J
Vahala, G
Vahala, L
AF Yepez, Jeffrey
Vahala, George
Vahala, Linda
BE Donkor, EJ
Pirich, AR
Brandt, HE
TI Twisting of filamentary vortex solitons demarcated by fast Poincare
recursion
SO QUANTUM INFORMATION AND COMPUTATION VII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Information and Computation VII
CY APR 16-17, 2009
CL Orlando, FL
SP SPIE
DE quantum lattice gas; quantum computation; quantum algorithm; BEC
superfluid; Gross-Pitaevskii eq.; vortex solitons; quantum turbulence;
Poincare recurrence; vortex twisting
ID KOLMOGOROV TURBULENCE; QUANTUM COMPUTATION; GAS; EQUATION;
REPRESENTATION; COMPUTERS; MODEL
AB The dynamics of vortex solitons is studied in a BEC superfluid. A quantum lattice-gas algorithm (measurement-based quantum computation) is employed to examine the dynamical behavior vortex soliton solutions of the Gross-Pitaevskii equation (phi(4) interaction nonlinear Schroedinger equation). Quantum turbulence is studied in large grid numerical simulations: Kolmogorov spectrum associated with a Richardson energy cascade occurs on large flow scales. At intermediate scales, a new k(-5.9) power law emerges, due to vortex filamentary reconnections associated with Kelvin wave instabilities (vortex twisting) coupling to sound modes and the exchange of intermediate vortex rings. Finally, at very small spatial scales a k(-3) power law emerges, characterizing fluid dynamics occurring within the scale size of the vortex cores themselves. Poincare recurrence is studied: in the free non-interacting system, a fast Poincare recurrence occurs for regular arrays of line vortices. The recurrence period is used to demarcate dynamics driving a nonlinear quantum fluid towards turbulence, since fast recurrence is an approximate symmetry of the nonlinear quantum fluid at early times. This class of quantum algorithms is useful for studying BEC superfluid dynamics and, without modification, should allow for higher resolution simulations (with many components) on future quantum computers.
C1 [Yepez, Jeffrey] USAF, Res Lab, Hanscom AFB, MA 01731 USA.
[Vahala, George] Coll William & Mary, Dept Phys, Williamsburg, VA 23185 USA.
[Vahala, Linda] Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA.
RP Yepez, J (reprint author), USAF, Res Lab, Hanscom AFB, MA 01731 USA.
EM jeffrey.yepez@gmail.com
NR 37
TC 3
Z9 3
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7608-1
J9 PROC SPIE
PY 2009
VL 7342
AR UNSP 73420M
DI 10.1117/12.819005
PG 12
WC Computer Science, Hardware & Architecture; Optics
SC Computer Science; Optics
GA BCS48
UT WOS:000311280400016
ER
PT S
AU Yepez, J
AF Yepez, Jeffrey
BE Donkor, EJ
Pirich, AR
Brandt, HE
TI Quantum informational representations of entangled fermions and bosons
SO QUANTUM INFORMATION AND COMPUTATION VII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Information and Computation VII
CY APR 16-17, 2009
CL Orlando, FL
SP SPIE
DE joint quantum logic; joint ladder operators; joint number operators;
entanglement operators; Temperley-Lieb algebra; braid group operators;
quantum measurement; quantum maps; quantum propositions
ID COMPUTATION
AB Presented is a second quantized technology for representing fermionic and bosonic entanglement in terms of generalized joint ladder operators, joint number operators, interchangers, and pairwise entanglement operators. The joint number operators generate conservative quantum logic gates that are used for pairwise entanglement in quantum dynamical systems. These are most useful for quantum computational physics. The generalized joint operator approach provides a pathway to represent the Temperley-Lieb algebra and to represent braid group operators for either fermionic or bosonic many-body quantum systems. Moreover, the entanglement operators allow for a representation of quantum measurement, quantum maps (associated with quantum Boltzmann equation dynamics), and for a way to completely and efficiently extract all accessible bits of joint information from entangled quantum systems in terms of quantum propositions.
C1 USAF, Res Lab, Hanscom AFB, MA 01731 USA.
RP Yepez, J (reprint author), USAF, Res Lab, Hanscom AFB, MA 01731 USA.
EM jeffrey.yepez@gmail.com
NR 10
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7608-1
J9 PROC SPIE
PY 2009
VL 7342
AR UNSP 73420R
DI 10.1117/12.831161
PG 12
WC Computer Science, Hardware & Architecture; Optics
SC Computer Science; Optics
GA BCS48
UT WOS:000311280400020
ER
PT S
AU Haugan, HJ
Elhamri, S
Mitchel, WC
Ullrich, B
Brown, GJ
Grazulis, L
Houston, S
AF Haugan, H. J.
Elhamri, S.
Mitchel, W. C.
Ullrich, B.
Brown, G. J.
Grazulis, L.
Houston, S.
BE Razeghi, M
Sudharsanan, R
Brown, GJ
TI Control of residual background carriers in undoped mid-infrared
InAs/GaSb superlattices
SO QUANTUM SENSING AND NANOPHOTONIC DEVICES VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Sensing and Nanophotonic Devices VI
CY JAN 25-28, 2009
CL San Jose, CA
SP SPIE
DE Residual carriers; infrared detectors; InAs/GaSb superlattices;
molecular beam epitaxy
ID II SUPERLATTICES; OPERATING TEMPERATURE; PERFORMANCE
AB The performance and operating temperature of infrared (IR) detectors is largely limited by thermal generation and noise processes in the active region of the device. Particularly, excess background charge carriers enhance Auger recombination and dark currents, and depress the detector figures of merit. Therefore, reducing background carriers in the undoped region of pin diodes is an important issue for developing high-operating temperature IR detectors. In this paper, we discuss how, through low-temperature Hall measurements, we optimized several growth and design parameters to lower residual carrier densities in various mid-IR InAs/GaSb superlattice (SL) designs. Among the growth/processing parameters investigated in the 21 angstrom InAs/24 angstrom GaSb SLs, neither growth temperature nor in-situ post-growth annealing significantly affected the overall carrier type and density. All of the mid-IR SL samples investigated were residually p-type. The lowest carrier density (1.8x10(11) cm(-2)) was achieved in SLs grown at 400 degrees C and the density was not reduced any further by a post-growth anneal. The growth parameter that most affected the carrier density was interface composition control. With a minor variation in interface shutter sequence, the carrier density dramatically increased from similar to 2x10(11) to 5x10(12) cm(-2), and the corresponding mobility dropped from 6600 to 26 cm(2)/Vs, indicating a degradation of interface quality. However, the carrier density was further reduced to 1x1011 cm(-2) by increasing the GaSb layer width. More importantly, a dramatic improvement on the photoluminescence intensity was achieved with wider GaSb SLs. The disadvantage is that as GaSb layer width increases from 24 to 48 angstrom, the photoluminescence peak position shifts from 4.1 to 3.4 mu m, for a fixed InAs width of 21 angstrom, indicating a photodiode based on these wider designs would fall short of fully covering the 3 to 5 mu m mid-IR spectral region.
C1 [Haugan, H. J.; Mitchel, W. C.; Brown, G. J.; Grazulis, L.; Houston, S.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Haugan, HJ (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 18
TC 3
Z9 3
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7468-1
J9 PROC SPIE
PY 2009
VL 7222
AR 72220Y
DI 10.1117/12.810520
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Optics; Physics, Applied; Spectroscopy
SC Engineering; Science & Technology - Other Topics; Optics; Physics;
Spectroscopy
GA BST59
UT WOS:000285747500031
ER
PT S
AU Wooten, D
Losovyj, YB
Petrosky, J
McClory, J
Tang, JK
Wang, WD
Dowben, PA
AF Wooten, David
Losovyj, Ya. B.
Petrosky, J.
McClory, J.
Tang, Jinke
Wang, Wendong
Dowben, P. A.
BE Dierolf, V
Fujiwara, Y
Hommerich, U
Ruterana, P
Zavada, JM
TI Surface Charging of n-Type Gd(2)O(3) and HfO(2) Thin Films
SO RARE-EARTH DOPING OF ADVANCED MATERIALS FOR PHOTONIC APPLICATIONS
SE Materials Research Society Symposium Proceedings
LA English
DT Proceedings Paper
CT Symposium on Rare-Earth Doping of Advanced Materials for Photonic
Applications held at the 2008 MRS Fall Meeting
CY DEC 01-04, 2008
CL Boston, MA
SP Mat Res Soc
ID GD-DOPED HFO2; PHOTOEMISSION; PHOTOVOLTAGE
AB Gd(2)O(3) and HfO(2) films exhibit temperature dependent photovoltaic charging. The dielectric properties of the surface and concomitant photovoltaic surface charging increases following oxygen exposure under ultrahigh vacuum conditions suggesting that the surface conductivity plays a role in the surface photovoltage charging.
C1 [Wooten, David; Petrosky, J.; McClory, J.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Wooten, D (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
OI McClory, John/0000-0002-4303-2729
NR 17
TC 0
Z9 0
U1 0
U2 0
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA
SN 0272-9172
BN 978-1-60511-083-7
J9 MATER RES SOC SYMP P
PY 2009
VL 1111
BP 287
EP 292
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA BMC23
UT WOS:000271829800038
ER
PT S
AU Olliges, JD
Ketsdever, AD
AF Olliges, J. D.
Ketsdever, A. D.
BE Abe, T
TI Experimental and Computational Investigation of a RF Plasma
Micro-Thruster
SO RAREFIED GAS DYNAMICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 26th International Symposium on Rarefied Gas Dynamics (RGD26)
CY JUN 20-JUL 25, 2008
CL Kyoto, JAPAN
SP Japan Soc Promot Sci, Japan Aerosp Explorat Agcy, Soc Promot Space Sci, Iwantani Naoji Fdn, Inoue Fdn Sci, Casio Sci Promot Fdn, Kaijma Fdn, IHI Corp, IHI Aerosp Engn Co Ltd, Osaka Vaccuun Ltd, Nissin Inc
DE Micropropulsion; RF plasma thruster; plasma modeling; DSMC
ID SIMULATIONS; CALIBRATION; DISCHARGES
AB A prototype RF plasma micro-thruster has been investigated numerically and experimentally. The experimental results were obtained on a thrust stand capable of micro-Newton resolution. Thrust and mass flow (hence specific impulse) were measured for an argon propellant at mass flows ranging from 0.4 to 5.5 mg/s. An increase over the cold gas thrust of up to 20% was observed for a discharge frequency of 100 MHz and an input power of 77 W. Propulsive efficiency was seen to increase both experimentally and numerically for increasing mass flow and decreasing discharge frequency.
C1 [Olliges, J. D.] Univ Southern Calif, Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
[Ketsdever, A. D.] US Air Force, Res Lab, Los Angeles, CA 93524 USA.
RP Olliges, JD (reprint author), Univ Southern Calif, Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
FU University of Southern California (USC)
FX The authors would like to thank the Air Force Research Laboratory,
Propulsion Directorate, Advanced Concepts Group for their support of the
experimental results. One of the authors (JDO) was partially supported
by an undergraduate research fellowship from the University of Southern
California (USC). The authors also thank Prof. E.P. Muntz of USC for the
use of Chamber IV of the Collaborative High Altitude Flow Facility.
NR 13
TC 0
Z9 0
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0615-5
J9 AIP CONF PROC
PY 2009
VL 1084
BP 863
EP +
PG 2
WC Engineering, Aerospace; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BJF97
UT WOS:000265564800138
ER
PT B
AU Maurice, MS
York, G
Masoni, SC
Won, DC
AF Maurice, Mark S.
York, George
Masoni, Stephanie C.
Won, Deanna C.
BE Kurnaz, S
Ince, F
Onbasioglu, S
Basturk, S
TI Basic Research in Space Science: Meaningful Collaboration with
Developing Countries
SO RAST 2009: PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON RECENT
ADVANCES IN SPACE TECHNOLOGIES
LA English
DT Proceedings Paper
CT 4th International Conference on Recent Advances in Space Technologies
CY JUN 11-13, 2009
CL Istanbul, TURKEY
SP Turkish Air Force Acad, Istanbul Tech Univ, Bogazici Univ, Marmara Univ, Bahcesehir Univ, Istanbul Commerce Univ, Halic Univ, Yeditepe Univ, IEEE, AIAA
DE basic research; space; developing countries; space weather; technology
security; collaboration
AB The U.S. Air Force looks world-wide to bring cutting edge basic research into its portfolio. In years past, this research primarily came from Western Europe. Since the early 1990's, however, the Air Force has expanded its collaborations significantly, and works with countries made accessible following the Cold War; countries that have developed new world-class capabilities; and countries with new and emerging scientific promise. Space weather, for example, is an emerging area of international interest, and is developing quickly in regions such as Africa. Other research, such as materials, also has significant pockets of excellence in developing countries, and is pervasive to include space applications. For applied space science and space hardware, however, U.S. export control regulations are a significant consideration in any collaboration. In addition, many developing countries require external funding sources to develop their scientific infrastructure. To that end, the Air Force Office of Scientific Research and the National Science Foundation are exploring ways to work collaboratively in these regions.
C1 [Maurice, Mark S.; Masoni, Stephanie C.; Won, Deanna C.] USAF, Res Lab, Off Sci Res, Arlington, VA 22202 USA.
[York, George] Air Force Res Lab, European Off Aerosp Res & Dev, Middlesex, England.
RP Maurice, MS (reprint author), USAF, Res Lab, Off Sci Res, Arlington, VA 22202 USA.
EM mark.maurice@afosr.af.mil; george.york@london.af.mil;
stephanie.masoni@afosr.af.mil; deanna.won@afosr.af.mil
NR 5
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3626-2
PY 2009
BP 1
EP +
PG 2
WC Engineering, Aerospace
SC Engineering
GA BLZ72
UT WOS:000271613000001
ER
PT B
AU Ozmen, O
AF Oezmen, Oezguer
BE Kurnaz, S
Ince, F
Onbasioglu, S
Basturk, S
TI Inelastic Deformation Behavior of PMR-15 High Temperature Polymer at 316
degrees C
SO RAST 2009: PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON RECENT
ADVANCES IN SPACE TECHNOLOGIES
LA English
DT Proceedings Paper
CT 4th International Conference on Recent Advances in Space Technologies
CY JUN 11-13, 2009
CL Istanbul, TURKEY
SP turkish Air Force Acad, Istanbul Tech Univ, Bogazici Univ, Marmara Univ, Bahcesehir Univ, Istanbul Commerce Univ, Halic Univ, Yeditepe Univ, IEEE, AIAA
DE polymer; PMR-15; creep; recovery; relaxation; prior strain rate
ID MECHANICAL-BEHAVIOR; STEEL
AB The strain rate (time)-dependent mechanical behavior of PMR-15 neat resin, a thermoset polymer, was investigated at 316 degrees C. In order to investigate the inelastic deformation behavior of PMR-15, experimental program was designed to explore the effect of prior strain rate on monotonic loading and unloading, and relaxation behaviors. In addition, the recovery of strain at zero stress and the creep behavior following strain controlled loading were examined. The material exhibits positive, nonlinear strain rate sensitivity in monotonic loading and unloading. Early failures occur in the inelastic regime. The recovery of strain and creep response are profoundly influenced by prior strain rate. The material does not exhibit strain rate history effect. The prior strain rate also has a strong influence on the relaxation behavior.
C1 USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH 45433 USA.
RP Ozmen, O (reprint author), USAF, Inst Technol, Grad Sch Engn & Management, Dayton, OH 45433 USA.
EM ozgurozmen1981@hotmail.com
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3626-2
PY 2009
BP 120
EP 124
PG 5
WC Engineering, Aerospace
SC Engineering
GA BLZ72
UT WOS:000271613000026
ER
PT S
AU Senkov, ON
Shagiev, MR
Miracle, DB
AF Senkov, O. N.
Shagiev, M. R.
Miracle, D. B.
BE Cabibbo, M
Spigarelli, S
TI Effect of Al-3(Sc,Zr) Particles on Tensile Properties of an
Al-Zn-Mg-Cu-Sc-Zr Alloy
SO RECENT DEVELOPMENTS IN THE PROCESSING AND APPLICATIONS OF STRUCTURAL
METALS AND ALLOYS
SE Materials Science Forum
LA English
DT Proceedings Paper
CT International Conference on Recent Developments in the Processing and
Applications of Structural Metals and Alloys
CY JUN 22-25, 2008
CL Marche Polytechn Univ, Dept Mech Engn, Como, ITALY
HO Marche Polytechn Univ, Dept Mech Engn
ID CAST; MICROSTRUCTURE
AB Small additions of Sc and Zr may considerably improve both strength and ductility of 7000 series aluminum alloys, which is associated with precipitation of fine coherent Al-3(Sc,Zr) particles. These particles also increase resistance to recrystallization and promote formation of a stable refined microstructure. Because Of Very low equilibrium solubility of Sc and Zr in Al alloys, a supersaturated solid solution of these elements in the Al matrix presented after casting is responsible for precipitation of the Al-3(,Sc,Zr) particles during subsequent heat treatment, while the strengthening effect depends on the particle size and number density. Therefore, it is necessary to optimize precipitation of the Al-3(Sc,Zr) particles, in order to achieve superior balance of mechanical properties. In the present work, the effect of heat treatment conditions oil microstructure and tensile properties of a developmental 7000 series Al alloy SSA018 modified with Sc and Zr was studied, with special emphasis oil the analysis of size and number density of the Al-3(Sc,Zr) particles, and their effect on the strength increase.
C1 [Senkov, O. N.; Miracle, D. B.] USAF, Res Lab, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
[Senkov, O. N.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Shagiev, M. R.] Russian Fed, Inst Met Superplast Problems, Moscow, Russia.
RP Senkov, ON (reprint author), USAF, Res Lab, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
EM oleg.senkov@wpafb.af.mil
RI Senkov, Oleg/C-7197-2012
OI Senkov, Oleg/0000-0001-5587-415X
FU United States Air Force [F04611-02-C-0014, FA8650-04-D-5233]
FX This work is dedicated to 70th birthday of Professor Enrico
Evangelista. Financial support through the United States Air Force
Contracts No. F04611-02-C-0014 (Capt. William Allen, Program Manager)
and No. FA8650-04-D-5233 (Dr. J. Fuller, Program Manager) is recognized.
NR 16
TC 0
Z9 0
U1 0
U2 5
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2009
VL 604-605
BP 113
EP +
PG 3
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BIX28
UT WOS:000263555900011
ER
PT S
AU Stoik, CD
Bohn, MJ
Blackshire, JL
AF Stoik, C. D.
Bohn, M. J.
Blackshire, J. L.
BE Thompson, DO
Chimenti, DE
TI NONDESTRUCTIVE EVALUATION OF AIRCRAFT COMPOSITES USING DIELECTRIC
PROPERTIES AND IMAGING IN THE TERAHERTZ SPECTRUM
SO REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A
AND 28B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 35th Annual Review of Progress in Quantitative Nondestructive Evaluation
CY JUL 20-25, 2008
CL Univ Chicago, Chicago, IL
HO Univ Chicago
DE Terahertz Imaging; Nondestructive Evaluation; Terahertz Spectroscopy;
Dielectric Properties
AB Terahertz imaging and dielectric property measurements were assessed as nondestructive evaluation techniques for damage to aircraft glass fiber composites. Samples with localized heat damage showed a minimal change in refractive index or absorption coefficient; however, material blistering was detected. Voids were located by terahertz imaging using amplitude and phase techniques. Delamination depths were approximated by measuring the timing of Fabry-Perot reflections. Evidence of bending stress damage and simulated hidden cracks was also detected with terahertz imaging.
C1 [Stoik, C. D.; Bohn, M. J.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Stoik, CD (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0629-2
J9 AIP CONF PROC
PY 2009
VL 1096
BP 418
EP 425
PG 8
WC Materials Science, Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BKO01
UT WOS:000268740800051
ER
PT S
AU Martin, SA
Sathish, S
Jata, KV
Welter, JT
AF Martin, Steven A.
Sathish, Shamachary
Jata, Kumar V.
Welter, John T.
BE Thompson, DO
Chimenti, DE
TI MODELING OF NON-CONTACT ACOUSTO-THERMAL SIGNATURE INTERROGATION (NCATS)
OF FATIGUE DAMAGE IN TI-6AL-4V
SO REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A
AND 28B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 35th Annual Review of Progress in Quantitative Nondestructive Evaluation
CY JUL 20-25, 2008
CL Univ Chicago, Chicago, IL
HO Univ Chicago
DE High Power Acoustics; Thermoelasticity; Fatigue
AB Non-Contact Acousto-Thermal Signatures (NCATS) is a new method of Nondestructive Evaluation of materials involving the thermal response to high intensity sound. The method differs from traditional thermography in that a portion of the induced heat loading occurs from conversion of acoustic to thermal energy. Studies of fatigue samples indicate that the magnitude of the internal heat generation is a function of fatigue damage level. An analytical linear damped acoustic layer model is developed to specify the internal heat generation as a function of insonification amplitude, material damping, and sample geometry. The internal heat generation predicted by the model is compared to that calculated in a Finite Element analysis. The acoustic model is combined with the thermal diffusion equation to create a model for time temperature response curves.
C1 [Martin, Steven A.] NDE Computat Consultants, 7697 Aldridge Pl, Dublin, OH 43017 USA.
[Jata, Kumar V.; Welter, John T.] Air Force Res Lab, Metals Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA.
[Sathish, Shamachary] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Martin, SA (reprint author), NDE Computat Consultants, 7697 Aldridge Pl, Dublin, OH 43017 USA.
FU U.S.Air Force; Wright-Patterson Air Force Base, Ohio [F33615-03-c-5219,
F3315-03-C5220]
FX This research was supported by the U.S.Air Force, and performed on-site
at the Nondestructive Evolution Branch, AFRL/Material and Manufacturing
Directorate, Wright-Patterson Air Force Base, Ohio under Contracts
#F33615-03-c-5219 and F3315-03-C5220.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0629-2
J9 AIP CONF PROC
PY 2009
VL 1096
BP 541
EP +
PG 2
WC Materials Science, Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BKO01
UT WOS:000268740800068
ER
PT S
AU Lissenden, CJ
Blackshire, JL
Puthillath, PK
AF Lissenden, Cliff J.
Blackshire, James L.
Puthillath, Padma K.
BE Thompson, DO
Chimenti, DE
TI STRUCTURAL HEALTH MONITORING OF COMPOSITE LAMINATES WITH EMBEDDED
PIEZOELECTRIC FIBERS
SO REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A
AND 28B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 35th Annual Review of Progress in Quantitative Nondestructive Evaluation
CY JUL 20-25, 2008
CL Univ Chicago, Chicago, IL
HO Univ Chicago
DE Structural Health Monitoring; Lamb Waves; Piezoelectric Sensors
ID METAL-CORE; ACTIVE COMPOSITES
AB The actuation of ultrasonic guided waves in a carbon fiber reinforced polymer plate from embedded metal core piezoelectric fibers is studied for structural health monitoring applications. A linear array of fibers embedded at the midplane can generate guided waves transverse to the fiber direction. Finite element simulations show that a significant source influence is associated with the small diameter piezoelectric fibers.
C1 [Lissenden, Cliff J.; Puthillath, Padma K.] Penn State Univ, University Pk, PA 16802 USA.
[Blackshire, James L.] US Air Force, Res Lab, NDE Branch, Wright Patterson AFB, OH USA.
RP Lissenden, CJ (reprint author), Penn State Univ, University Pk, PA 16802 USA.
NR 16
TC 0
Z9 0
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0629-2
J9 AIP CONF PROC
PY 2009
VL 1096
BP 974
EP +
PG 2
WC Materials Science, Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BKO01
UT WOS:000268740800123
ER
PT S
AU Martin, RW
Sathish, S
Jata, KV
Welter, JT
Matson, LE
AF Martin, R. W.
Sathish, Shamachary
Jata, Kumar V.
Welter, John T.
Matson, Larry E.
BE Thompson, DO
Chimenti, DE
TI ULTRASONIC MEASUREMENT OF LOCALIZED ELASTIC PROPERTIES AND THICKNESS OF
SILICON CARBIDE MIRRORS
SO REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A
AND 28B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 35th Annual Review of Progress in Quantitative Nondestructive Evaluation
CY JUL 20-25, 2008
CL Univ Chicago, Chicago, IL
HO Univ Chicago
DE Ultrasonic; SiC Mirror; Thickness; Velocity
ID VELOCITY
AB Silicon Carbide (SiC) mirrors have significant advantages compared to glass mirrors. They are less dense, possess very high elastic stiffness and have a low thermal expansion coefficient over a wide temperature range, and hence suitable for aerospace applications. However, the manufacturing process induces significant residual stress and thickness variation. The polishing process used to produce high quality mirrors, alters both the residual stress and thickness of the mirror. In some cases this might produce local damage and limit the usability of the mirror. At present there is a need for NDE techniques to evaluate the damage and ensure the quality of SiC mirrors. To address this issue, we have developed ultrasonic methods to measure simultaneously the local variation in thickness and the through-thickness longitudinal wave velocity in SiC mirrors. The impact of the variations in the material properties are discussed with reference to the changes in residual stress distribution after polishing.
C1 [Jata, Kumar V.; Welter, John T.] USAF, Met Ceram & NDE Div, RXLP, Wright Patterson AFB, OH 45433 USA.
RP Martin, RW (reprint author), Univ Dayton, Res Inst, 300 Coll Pk Dr, Dayton, OH 45469 USA.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0629-2
J9 AIP CONF PROC
PY 2009
VL 1096
BP 1295
EP 1300
PG 6
WC Materials Science, Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BKO01
UT WOS:000268740800165
ER
PT S
AU Shearer, J
Heebl, J
Brausch, J
Lindgren, E
AF Shearer, J.
Heebl, J.
Brausch, J.
Lindgren, E.
BE Thompson, DO
Chimenti, DE
TI PROGRESS IN DEVELOPING TRANSFER FUNCTIONS FOR SURFACE SCANNING EDDY
CURRENT INSPECTIONS
SO REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A
AND 28B
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 35th Annual Review of Progress in Quantitative Nondestructive Evaluation
CY JUL 20-25, 2008
CL Univ Chicago, Chicago, IL
HO Univ Chicago
DE Eddy Current; Transfer Function; Surface Scanning; Field Inspection;
Fatigue Crack; EDM
AB As US Air Force (USAF) aircraft continue to age, additional inspections are required for structural components. The validation of new inspections typically requires a capability demonstration of the method using representative structure with representative damage. To minimize the time and cost required to prepare such samples, Electric Discharge machined (EDM) notches are commonly used to represent fatigue cracks in validation studies. However, the sensitivity to damage typically changes as a function of damage type. This requires a mathematical relationship to be developed between the responses from the two different flaw types to enable the use of EDM notched samples to validate new inspections. This paper reviews progress to develop transfer functions for surface scanning eddy current inspections of aluminum and titanium alloys found in structural aircraft components. Multiple samples with well characterized grown fatigue cracks and master gages with EDM notches, both with a range of flaw sizes, were used to collect flaw signals with USAF field inspection equipment. Analysis of this empirical data was used to develop a transfer function between the response from the EDM notches and grown fatigue cracks.
C1 [Shearer, J.; Heebl, J.; Lindgren, E.] AF Res Lab, Nondestruct Evaluat Branch, Dayton, OH 45433 USA.
[Brausch, J.] AF Res Lab, Mat Integrity Branch, Dayton, OH 45433 USA.
RP Shearer, J (reprint author), AF Res Lab, Nondestruct Evaluat Branch, Dayton, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0629-2
J9 AIP CONF PROC
PY 2009
VL 1096
BP 1870
EP +
PG 2
WC Materials Science, Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BKO01
UT WOS:000268740800239
ER
PT B
AU Secrest, BR
Vasquez, JR
AF Secrest, Barry R.
Vasquez, Juan R.
GP IEEE
TI Optimal Spatial Sampling of Hyperspectral Imagery for Fusion with
Panchromatic Video in Multitarget Tracking
SO SAS 2009 - IEEE SENSORS APPLICATIONS SYMPOSIUM, PROCEEDINGS
LA English
DT Proceedings Paper
CT 4th IEEE Sensors Applications Symposium
CY FEB 17-19, 2009
CL New Orleans, LA
SP IEEE Instrumentat & Measurement Soc
DE Multitarget Tracking; Hyperspectral Imagery; Data Fusion; Multiobjective
Evolutionary Algorithm
AB Hyperspectral imagery (HSI) data has proven useful for discriminating targets, however the relatively slow speed at which HSI data is gathered for an entire frame reduces the usefulness of fusing this information with panchromatic video. Additionally, the volume of HSI information collected affects the computational performance of software exploiting the information. Paradoxically, it is too much information and we cannot get enough of it. A new sensor under development has the potential of overcoming this problem. It has the ability to provide HSI data for a limited number of pixels while providing panchromatic video for the remainder of the pixels. The HSI data is co-registered with the panchromatic video and is available at each frame. This paper investigates the exploitation of this new sensor for target tracking. The first challenge of exploiting this sensor is to determine where the gathering of HSI data will be the most useful as compared to collecting panchromatic. We optimize the selection of pixels for which we will gather HSI data. We refer to this as spatial sampling. Spatial sampling is solved using a utility function where pixels receive a value based on their nearness to a target of interest (TOI). The TOIs are determined from the tracking algorithm providing a close coupling of the tracking and the sensor control. The weighting of the different types of TOIs is accomplished by a multiobjective genetic algorithm. Experiments compare fused versus non-fused tracking performance.
C1 [Secrest, Barry R.] USAF, Inst Technol, Dayton, OH 45429 USA.
[Vasquez, Juan R.] Numer Corp, Beavercreek, OH 45431 USA.
RP Secrest, BR (reprint author), USAF, Inst Technol, Dayton, OH 45429 USA.
EM Barry.Secrest@AFIT.edu; Juan.Vasquez@numerica.us
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2786-4
PY 2009
BP 225
EP +
PG 2
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Remote Sensing
SC Engineering; Instruments & Instrumentation; Remote Sensing
GA BKL67
UT WOS:000268444000046
ER
PT J
AU Mall, S
Sullivan, MA
AF Mall, S.
Sullivan, M. A.
TI Tension-Tension Fatigue Behavior of Notched Nextel (TM) 720/Alumina
(N720/A) at Elevated Temperature
SO SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
LA English
DT Article
ID CERAMIC-MATRIX COMPOSITE; MECHANICAL-BEHAVIOR; FRACTURE-BEHAVIOR;
DAMAGE-TOLERANT; POROUS-MATRIX
AB Oxide/oxide ceramic matrix composites (CMCs) are candidate materials for aerospace applications where their inherent resistance to oxidation could provide longer lifetime and better strength at elevated temperatures. Real applications of CMCs would require different types of notches. The material behavior in the presence of a notch must be therefore characterized. This study investigated fatigue behavior of an oxide/oxide CMC consisting of Nextel (TM) 720 (meta-stable mullite) fibers in alumina matrix, N720/A with 0 degrees/90 degrees fiber orientation having hole diameter to width ratio of 0.33 at 1200 degrees C in laboratory air environment. Monotonic tensile tests at 1200 degrees C were also performed. Fracture Surfaces were examined to analyze failure and damage mechanisms. Fatigue load with maximum stress equal to 92% of the ultimate tensile strength caused a large reduction in life (about ten cycles) while fatigue test with the maximum stress equal to 80% of the ultimate tensile strength had life more than 500,000 cycles. Comparisons between notched and unnotched data showed that N720/A is practically insensitive to the notch (hole) under fatigue and monotonic tensile loading conditions.
C1 [Mall, S.; Sullivan, M. A.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
NR 20
TC 0
Z9 0
U1 2
U2 10
PU FREUND PUBLISHING HOUSE LTD
PI TEL AVIV
PA PO BOX 35010, TEL AVIV 61350, ISRAEL
SN 0334-181X
J9 SCI ENG COMPOS MATER
JI Sci. Eng. Compos. Mater.
PY 2009
VL 16
IS 4
BP 235
EP 245
PG 11
WC Materials Science, Composites
SC Materials Science
GA 567LT
UT WOS:000275449000002
ER
PT S
AU Bai, ZW
Venkat, N
Juhl, SB
Rodrigues, SJ
Dang, TD
AF Bai, Zongwu
Venkat, Narayanan
Juhl, Shane B.
Rodrigues, Stanley J.
Dang, Thuy D.
BE Leng, J
Asundi, AK
Ecke, W
TI Nanocomposite Materials Based on Sulfonated Polyarylenethioethersulfone
and Sulfonated Polybenzimidazole for Proton Exchange Membrane Fuel Cell
Applications
SO SECOND INTERNATIONAL CONFERENCE ON SMART MATERIALS AND NANOTECHNOLOGY IN
ENGINEERING
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 2nd International Conference on Smart Materials and Nanotechnology in
Engineering
CY JUL 08-11, 2009
CL Weihai, PEOPLES R CHINA
SP Harbin Inst Technol
DE Sulfonated polyarylenethioether sulfone (SPTES); sulfonated
polybenzimidazole (SPBI); polymer nanocomposite; proton exchange
membrane (PEM); proton conductivity
ID POLYMER ELECTROLYTE; COMPOSITE MEMBRANES; CONDUCTIVITY; BLENDS
AB Fabrication of novel nanocomposite membranes comprising a fully sulfonated polyarylenethioether sulfone (SPTES) and sulfonated poly(p-phenylene benzobisimidazole)(SPBI) and the evaluation of the membrane properties are described. The nanocomposite membrane was obtained via a solvent cast process in a mixture of DMAc and methanol as solvents. The nanocomposite membrane proton conductivity, as measured by four probe impedance spectroscopy, was found to increase with increase in the SPTES content in the nanocomposite. The highest proton conductivity obtained was similar to 80mS/cm at 65 degrees C and 85% relative humidity for the SPTES/SPBI 70/30 nanocomposite membrane which was considerably less than the 300 mS/cm for the pure SPTES membrane, but it was found that the swelling of the nanocomposite membranes was reduced due to the reduced water uptake of the nanocomposite membrane relative to SPTES. The morphology of the SPTES/SPBI nanocomposite membranes was examined by a combination of techniques, such as X-ray diffraction and scanning electron microscopy, to confirm the dispersion of SPBI in the nanocomposite. The membrane electrode assembly performance of the nanocomposite membranes was preliminary studied for H-2/O-2 fuel cells applications.
C1 [Bai, Zongwu; Venkat, Narayanan] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Juhl, Shane B.; Dang, Thuy D.] AFRL, RXBN, Wright Patterson AFB, OH 45433 USA.
[Rodrigues, Stanley J.] AFRL, RZPS, Wright Patterson AFB, OH 45433 USA.
RP Bai, ZW (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM zongwu.bai@wpafb.af.mil
NR 15
TC 0
Z9 0
U1 2
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7804-7
J9 PROC SPIE
PY 2009
VL 7493
AR 74933M
DI 10.1117/12.839200
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics
SC Science & Technology - Other Topics; Materials Science; Optics
GA BCM05
UT WOS:000310681100129
ER
PT S
AU Wang, DH
Jacobs, JD
Trionfi, A
Arlen, MJ
Hsu, JWP
Vaia, RA
Tan, LS
AF Wang, David H.
Jacobs, J. David
Trionfi, Aaron
Arlen, Michael J.
Hsu, Julia W. P.
Vaia, Richard A.
Tan, Loon-Seng
BE Leng, J
Asundi, AK
Ecke, W
TI In-Situ Synthesis and Thermal-Electrical Properties of
CP2-Polyimide/Pristine and Amine-Functionalized Carbon Nanofiber
Composites
SO SECOND INTERNATIONAL CONFERENCE ON SMART MATERIALS AND NANOTECHNOLOGY IN
ENGINEERING
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 2nd International Conference on Smart Materials and Nanotechnology in
Engineering
CY JUL 08-11, 2009
CL Weihai, PEOPLES R CHINA
SP Harbin Inst Technol
DE Polyimides; Vapor-Grown Carbon Nanofibers; Nanocomposites; Electrical
Properties; Smart Materials
ID POLYMER NANOCOMPOSITES; NANOTUBES; CONDUCTIVITY; ACID; FILMS; DC
AB Vapor-grown carbon nanofibers (VGCNF) functionalized with amine-containing pendants, viz.H2N-VGCNF, reacted with 2,2-bis(phthalic anhydride)-1,1,1,3,3,3-hexafluoroisopropane, which was the dianhydride monomer used in in-situ polymerization with 1,3-bis(3-aminophenoxy)benzene to afford a series of CP2-polyimide nanocomposite films (FCNF-CP2), containing 0.18-9.19 wt % of H2N-VGCNF (corresponding to 0.10-5.0 wt % of pristine VGCNF), via conventional poly(amic acid) precursor method. For comparison, another series of in situ nanocomposites containing pristine VGCNF (0.10-5.0 wt %) was also prepared similarly. While H2N-VGCNFs enabled direct formation of CP2 grafts on the nanofibers, pristine VGCNFs would result in a relatively weak interface between nanofibers and the CP2 matrix. Conducting-tip atomic force microscopy (C-AFM) showed that the electrical transport was solely through the nanofiber networks in the PCNF-CP2. In general, low-frequency ac impedance measurements followed well the percolation bond model with low percolation threshold; 0.24 and 0.68 vol % for PCNF-CP2 and FCNF-CP2, respectively. However, the design of interface is determined to be crucial for controlling the electrical behavior in four substantial ways: (i) magnitude of limiting conductivity, (ii) linearity of I-V response, (iii) magnitude and direction of temperature-dependent resistivity, and (iv) reproducibility of the absolute value of resistivity with thermal cycling. These observations are consistent with a direct CNF-CNF contact limiting transport in the PCNF-CP2 system, where the CP2 grafts on FCNF form a dielectric layer between individual CNFs, limiting transport within the FCNF-CP2 system. Furthermore, the CP2 grafts on the FCNF surface reduce local polymer dewetting at the nanofiber surfaces when the temperatures exceed the CP2 glass transition, and stabilize the structure of the percolation network and associated conductivity. The general behavior of these interfacial extremes (pristine and fully functionalized CNFs) set important bounds on the design of interface modification for CNFs when the intended use is for electrical performance at elevated temperatures or under extreme current loads. The influence of processing conditions resulting in the spread of measured conductivity by several orders of magnitude for films containing the same type and same amount of CNFs is also reported.
C1 [Wang, David H.; Arlen, Michael J.; Vaia, Richard A.; Tan, Loon-Seng] USAF, Mat & Mfg Directorate, RXBN, Wright Patterson AFB, OH 45433 USA.
RP Wang, DH (reprint author), USAF, Mat & Mfg Directorate, RXBN, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@wpafb.af.mil
RI Wang, David/F-7492-2013; Tan, Loon-Seng/F-6985-2012
OI Wang, David/0000-0001-6710-7265; Tan, Loon-Seng/0000-0002-2134-9290
NR 29
TC 0
Z9 0
U1 3
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7804-7
J9 PROC SPIE
PY 2009
VL 7493
AR 74931Q
DI 10.1117/12.839929
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics
SC Science & Technology - Other Topics; Materials Science; Optics
GA BCM05
UT WOS:000310681100061
ER
PT J
AU Phillips, AN
Mullins, BE
Raines, RA
Baldwin, RO
AF Phillips, Adrian N.
Mullins, Barry E.
Raines, Richard A.
Baldwin, Rusty O.
TI A secure group communication architecture for autonomous unmanned aerial
vehicles
SO SECURITY AND COMMUNICATION NETWORKS
LA English
DT Article
DE group key management; multicast; security; unmanned aerial vehicles
ID SATELLITE MULTICAST; KEY MANAGEMENT; NETWORKS; ISSUES
AB This paper investigates the application of a secure group communication architecture to a swarm of autonomous unmanned aerial vehicles (UAVs). A multicast secure group communication architecture for the low earth orbit (LEO) satellite environment is evaluated to determine if it can be effectively adapted to a swarm of UAVs and provide secure, scalable, and efficient communications. The performance of the proposed security architecture is evaluated with two other commonly used architectures using a discrete event computer simulation developed using MATLAB. Performance is evaluated in terms of the scalability and efficiency of the group key distribution and management scheme when the swarm size, swarm mobility, multicast group join and departure rates are varied. The metrics include the total keys distributed over the simulation period, the average number of times an individual UAV must rekey, the average bandwidth used to rekey the swarm, and the average percentage of battery consumed by a UAV to rekey over the simulation period. The proposed security architecture can successfully be applied to a swarm of autonomous UAVs using current technology. The proposed architecture is more efficient and scalable than the other tested and commonly used architectures. Over all the tested configurations, the proposed architecture distributes 55.2-94.8% fewer keys, rekeys 59.0-94.9% less often per UAV, uses 55.2-87.9% less bandwidth to rekey, and reduces the battery consumption by 16.9-85.4%. Published in 2008 by John Wiley & Sons, Ltd.
C1 [Phillips, Adrian N.; Mullins, Barry E.; Raines, Richard A.; Baldwin, Rusty O.] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Mullins, BE (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM Barry.Mullins@afit.edu
FU Air Force Communications Agency
FX This work was supported in part by the Air Force Communications Agency.
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 U.S. Government.
NR 20
TC 2
Z9 2
U1 2
U2 10
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1939-0114
J9 SECUR COMMUN NETW
JI Secur. Commun. Netw.
PD JAN-FEB
PY 2009
VL 2
IS 1
BP 55
EP 69
DI 10.1002/sec.55
PG 15
WC Computer Science, Information Systems; Telecommunications
SC Computer Science; Telecommunications
GA 554NE
UT WOS:000274440900005
ER
PT S
AU Berardi, SM
AF Berardi, Steven M.
BE Cox, JL
Motaghedi, P
TI Technology collaboration by means of an open source government
SO SENSORS AND SYSTEMS FOR SPACE APPLICATIONS III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Sensors and Systems for Space Applications III
CY APR 14-15, 2009
CL Orlando, FL
SP SPIE
DE Technology collaboration; open source government; mass collaboration;
information management; network centric warfare; knowledge management
AB The idea of open source software originally began in the early 1980s, but it never gained widespread support until recently, largely due to the explosive growth of the Internet. Only the Internet has made this kind of concept possible, bringing together millions of software developers from around the world to pool their knowledge. The tremendous success of open source software has prompted many corporations to adopt the culture of open source and thus share information they previously held secret. The government, and specifically the Department of Defense (DoD), could also benefit from adopting an open source culture. In acquiring satellite systems, the DoD often builds walls between program offices, but installing doors between programs can promote collaboration and information sharing. This paper addresses the challenges and consequences of adopting an open source culture to facilitate technology collaboration for DoD space acquisitions. DISCLAIMER: The views presented here are the views of the author, and do not represent the views of the United States Government, United States Air Force, or the Missile Defense Agency.
C1 USAF, El Segundo, CA 90245 USA.
RP Berardi, SM (reprint author), USAF, 483 N Aviat Blvd, El Segundo, CA 90245 USA.
NR 18
TC 0
Z9 0
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7596-1
J9 PROC SPIE
PY 2009
VL 7330
AR 73300V
DI 10.1117/12.817618
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Instruments & Instrumentation; Remote Sensing; Optics
SC Computer Science; Instruments & Instrumentation; Remote Sensing; Optics
GA BVS55
UT WOS:000292649600025
ER
PT S
AU Gordon, JM
Gross, KC
Perram, GP
AF Gordon, Joe Motos
Gross, Kevin C.
Perram, Glen P.
BE Cox, JL
Motaghedi, P
TI Temporally-Resolved, Infrared Spectra from the Detonation of Advanced
Munitions
SO SENSORS AND SYSTEMS FOR SPACE APPLICATIONS III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Sensors and Systems for Space Applications III
CY APR 14-15, 2009
CL Orlando, FL
SP SPIE
DE High explosive; detonation; RDX; aluminum; combustion; fireball;
spectroscopy; FTS; classification
ID BOMB DETONATIONS
AB A suite of instruments including a 100 kHz 4-channel radiometer, a rapid scanning Fourier-transform infrared spectrometer, and two high-speed visible imagers was used to observe the detonation of several novel insensitive munitions being developed by the Air Force Research Laboratory. The spectral signatures exhibited from several different explosive compositions are discernable and may be exploited for event classification. The spectra are initially optically thick, resembling a Planckian distribution. In time, selective emission in the wings of atmospheric absorption bands becomes apparent, and the timescale and degree to which this occurs is correlated with aluminum content in the explosive formulation. By analyzing the high-speed imagery in conjunction with the time-resolved spectral measurements, it may be possible to interpret these results in terms of soot production and oxidation rates. These variables allow for an investigation into the chemical kinetics of explosions and perhaps reveal other phenomenology not yet readily apparent. With an increased phenomenological understanding, a model could be created to explain the kinetic behavior of the temperature and by-product concentration profiles and thus improve the ability of military sensing platforms to identify explosive types and sources.
C1 [Gordon, Joe Motos; Gross, Kevin C.; Perram, Glen P.] USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
RP Gordon, JM (reprint author), USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
EM kevin.gross@afit.edu; glen.perram@afit.edu
OI Perram, Glen/0000-0002-4417-3929
NR 7
TC 4
Z9 4
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7596-1
J9 PROC SPIE
PY 2009
VL 7330
AR 733006
DI 10.1117/12.818166
PG 8
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Instruments & Instrumentation; Remote Sensing; Optics
SC Computer Science; Instruments & Instrumentation; Remote Sensing; Optics
GA BVS55
UT WOS:000292649600004
ER
PT S
AU Williams, AD
Lyall, ME
Hengeveld, DW
Young, QE
AF Williams, Andrew D.
Lyall, M. Eric
Hengeveld, Derek W.
Young, Quinn E.
BE Cox, JL
Motaghedi, P
TI Thermal control subsystem requirements and challenges for a responsive
satellite bus
SO SENSORS AND SYSTEMS FOR SPACE APPLICATIONS III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Sensors and Systems for Space Applications III
CY APR 14-15, 2009
CL Orlando, FL
SP SPIE
DE spacecraft; thermal control; responsive satellites; responsive space;
robust design
AB The traditional approach to satellite design is a customized and highly optimized satellite bus. The primary design driver is to minimize mass but often at the expense of schedule and non-recurring engineering costs. The result after years of development is a high performance system with minimal flexibility. Consequently, there is a need for responsive, small satellites that are able to accommodate different missions, changing threats, and emerging technologies for which the traditional development approach is unable to satisfy. Instead, systems must be modular and/or robust. One of the subsystems that will be challenging for the development of modular and/or robust architectures is the thermal control subsystem (TCS). To design a traditional TCS, virtually every aspect of the mission, the satellite, and the components must be known before an intense design program can be completed. However, the mission, payload, components, and requirements are largely unknown before mission initiation. To provide a baseline for the TCS design and to help bound the problem for the development of robust thermal systems, the range of external and internal heat loads for small satellites were evaluated. From this analysis, the realistic worst design cases were identified along with other requirements for robust thermal control systems. Finally, the paper will discuss the merits of various thermal architectures and the challenges associated with achieving the requirements for robust thermal control for responsive satellite buses.
C1 [Williams, Andrew D.; Lyall, M. Eric] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Williams, AD (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
NR 16
TC 1
Z9 1
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7596-1
J9 PROC SPIE
PY 2009
VL 7330
AR 73300E
DI 10.1117/12.818826
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Instruments & Instrumentation; Remote Sensing; Optics
SC Computer Science; Instruments & Instrumentation; Remote Sensing; Optics
GA BVS55
UT WOS:000292649600009
ER
PT J
AU Bebarta, V
Dixon, P
Bush, A
Pitotti, B
Lairet, J
Tanen, D
Moore, E
AF Bebarta, V.
Dixon, P.
Bush, A.
Pitotti, B.
Lairet, J.
Tanen, D.
Moore, E.
TI HYDROXOCOBALAMIN/SODIUM THIOSULFATE VS. SODIUM NITRITE/SODIUM
THIOSULFATE FOR ACUTE CYANIDE TOXICITY IN A SWINE MODEL
SO SHOCK
LA English
DT Meeting Abstract
CT 32nd Annual Conference on Shock
CY JUN 06-09, 2009
CL San Antonio, TX
SP Shock Soc
C1 [Bebarta, V.; Dixon, P.; Bush, A.; Pitotti, B.; Lairet, J.; Tanen, D.; Moore, E.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
RI Bebarta, Vikhyat/M-1513-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1073-2322
J9 SHOCK
JI Shock
PY 2009
VL 31
BP 21
EP 22
PG 2
WC Critical Care Medicine; Hematology; Surgery; Peripheral Vascular Disease
SC General & Internal Medicine; Hematology; Surgery; Cardiovascular System
& Cardiology
GA 463ND
UT WOS:000267438000067
ER
PT J
AU Cheng, ZQ
Pellettiere, JA
Crandall, JR
Pilkey, WD
AF Cheng, Zhiqing
Pellettiere, Joseph A.
Crandall, Jeff R.
Pilkey, Walter D.
TI Optimal occupant kinematics and crash pulse for automobile frontal
impact
SO SHOCK AND VIBRATION
LA English
DT Article
DE Automobile front impact; optimal occupant kinematics; optimal crash
pulse; restraint systems
AB Based on a lumped-parameter model of the occupant-vehicle system, optimal kinematics of the occupant in frontal impact are investigated. It is found that for the minimization of the peak occupant deceleration, the optimal kinematics move the occupant at a constant deceleration. Based on this the optimal vehicle crash pulse is investigated. The optimal crash pulse for passive restraint systems is found to be: a positive impulse at the onset, an immediate plunge followed by a gradual rebound, and finally a positive level period. The relation of the peak occupant deceleration to the impact speed, crash deformation, and vehicle interior rattlespace is established. The optimal crash pulse for active and pre-acting restraint systems is discussed.
C1 [Cheng, Zhiqing; Pellettiere, Joseph A.] USAF, Res Lab, Human Effectiveness Directorate, Dayton, OH 45433 USA.
[Cheng, Zhiqing] Infoscitex, Dayton, OH 45431 USA.
[Crandall, Jeff R.; Pilkey, Walter D.] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA.
RP Cheng, ZQ (reprint author), USAF, Res Lab, Human Effectiveness Directorate, Dayton, OH 45433 USA.
EM zhiqing.cheng@wpafb.af.mil
RI Crandall, Jeff/N-2210-2014
NR 10
TC 1
Z9 1
U1 1
U2 3
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1070-9622
J9 SHOCK VIB
JI Shock Vib.
PY 2009
VL 16
IS 1
BP 61
EP 73
DI 10.3233/SAV-2009-0454
PG 13
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 387IP
UT WOS:000261946200004
ER
PT J
AU Beachkofski, BK
AF Beachkofski, Brian K.
TI Probabilistic rotor life assessment using reduced order models
SO SHOCK AND VIBRATION
LA English
DT Article
DE High cycle fatigue; probabilistic analysis; reduced order model; system
reliability
ID FOREIGN-OBJECT DAMAGE; FATIGUE
AB Probabilistic failure assessments for integrally bladed disks are system reliability problems where a failure in at least one blade constitutes a rotor system failure. Turbine engine fan and compressor blade life is dominated by High Cycle Fatigue (HCF) initiated either by pure HCF or Foreign Object Damage (FOD). To date performing an HCF life assessment for the entire rotor system has been too costly in analysis time to be practical. Although the substantial run-time has previously precluded a full-rotor probabilistic analysis, reduced order models make this process tractable as demonstrated in this work. The system model includes frequency prediction, modal stress variation, mistuning amplification, FOD effect, and random material capability. The model has many random variables which are most easily handled through simple random sampling.
C1 USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
RP Beachkofski, BK (reprint author), USAF, Res Lab, Prop Directorate, 1950 5th St, Wright Patterson AFB, OH 45433 USA.
EM brian.beachkofski@wpafb.af.mil
NR 16
TC 1
Z9 1
U1 2
U2 6
PU HINDAWI PUBLISHING CORP
PI NEW YORK
PA 315 MADISON AVE 3RD FLR, STE 3070, NEW YORK, NY 10017 USA
SN 1070-9622
EI 1875-9203
J9 SHOCK VIB
JI Shock Vib.
PY 2009
VL 16
IS 6
BP 581
EP 591
DI 10.3233/SAV-2009-0490
PG 11
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 533AI
UT WOS:000272793600004
ER
PT S
AU Kleiser, GJ
Chhabildas, LC
Reinhart, WD
AF Kleiser, G. J.
Chhabildas, L. C.
Reinhart, W. D.
BE Elert, ML
Buttler, WT
Furnish, MD
Anderson, WW
Proud, WG
TI SHOCK LOADING OF POLYCRYSTALLINE ALUMINA AND SAPPHIRE - A COMPARATIVE
STUDY
SO SHOCK COMPRESSION OF CONDENSED MATTER - 2009, PTS 1 AND 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 16th Conference of the American-Physical-Society-Topical-Group on Shock
Compression of Condensed Matter
CY JUN 28-JUL 03, 2009
CL Nashville, TN
SP Amer Phys Soc, Topical Grp
DE Shock loading; single crystals; alumina; sapphire
ID WAVE
AB There is considerable interest in the shock loading behavior of aluminum oxide whether it is in the polycrystalline phase or in the single crystal phase. Results of well-controlled experiments conducted recently on polycrystalline alumina and Z-cut sapphire are summarized to conduct a comparative study. Although the experimental results appear to have the same behavior in the shock-velocity vs. particle-velocity plane, they are considerably different in the stress-volume compression plane. This is an extremely interesting observation and cannot be explained merely by the differences in the strength of the material in the shocked state.
C1 [Kleiser, G. J.; Chhabildas, L. C.] Air Force Res Lab, Munit Directorate, 101 W Eglin Blvd, Eglin AFB, FL 32542 USA.
[Reinhart, W. D.] Sandia National Lab, Albuquerque, NM 87185 USA.
RP Kleiser, GJ (reprint author), Air Force Res Lab, Munit Directorate, 101 W Eglin Blvd, Eglin AFB, FL 32542 USA.
FU U.S. DOE [DE-AC04-94AL85000]
FX This work was performed at Sandia National Laboratories supported by the
U.S. DOE under contract DE-AC04-94AL85000.
NR 12
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0732-9
J9 AIP CONF PROC
PY 2009
VL 1195
BP 981
EP +
DI 10.1063/1.3295310
PG 2
WC Physics, Condensed Matter
SC Physics
GA BOG48
UT WOS:000276574100233
ER
PT S
AU White, BW
Thadhani, NN
Jordan, JL
Spowart, JE
AF White, Bradley W.
Thadhani, Naresh N.
Jordan, Jennifer L.
Spowart, Jonathan E.
BE Elert, ML
Buttler, WT
Furnish, MD
Anderson, WW
Proud, WG
TI THE EFFECT OF PARTICLE REINFORCEMENT ON THE DYNAMIC DEFORMATION OF
EPOXY-MATRIX COMPOSITES
SO SHOCK COMPRESSION OF CONDENSED MATTER - 2009, PTS 1 AND 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 16th Conference of the American-Physical-Society-Topical-Group on Shock
Compression of Condensed Matter
CY JUN 28-JUL 03, 2009
CL Nashville, TN
SP Amer Phys Soc, Topical Grp
DE Particulate composites; Taylor rod-on-anvil impact; dynamic mechanical
behavior
ID MECHANICAL-BEHAVIOR; FRACTURE-BEHAVIOR
AB Multiphase composite materials consisting of one or more types of particle reinforcement in an epoxy matrix are being studied to determine the effect of reinforcement on the dynamic yield strength and critical impact velocity for plastic deformation. Casting was used to prepare epoxy-matrix composites with varying particle loading fractions (20 - 50 Vol%), size (5 and 50 mu m), and type (Al or Ni+Al). The cast samples were tested at strain rates in the range of 10(3) to 10(4) s(-1), using a 7.62 mm gas gun with a rod-on-anvil (Taylor) impact experiment setup. The recovered impacted specimens were analyzed to determine the dimensions of their deformed and undeformed regions. The yield strength and critical velocity for plastic deformation were evaluated using Hutching's analysis and correlated with quantitative characteristics of the size and distribution of the reinforcement phases [1, 2].
C1 [White, Bradley W.; Thadhani, Naresh N.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Jordan, Jennifer L.] AFRL, RWME, Eglin AFB, FL 32542 USA.
[Spowart, Jonathan E.] AFRL, RXLMD, Wright Patterson AFB, OH 45433 USA.
RP White, BW (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RI White, Bradley/G-3679-2011;
OI Jordan, Jennifer/0000-0002-4596-5872
FU U.S. Air Force Research Labs; Eglin AFB [F08630- 03-C-OOOl]; ONR/MURI
[NOOO14-07-1-0740]
FX Funding was provided by the U.S. Air Force Research Labs, Eglin AFB
under contract F08630- 03-C-OOOl, and in part by ONR/MURI grant No.
NOOO14-07-1-0740.
NR 11
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0732-9
J9 AIP CONF PROC
PY 2009
VL 1195
BP 1245
EP +
PG 2
WC Physics, Condensed Matter
SC Physics
GA BOG48
UT WOS:000276574100294
ER
PT S
AU Jordan, JL
Dattelbaum, D
Ferranti, L
Sutherland, G
Baer, M
Richards, W
Sheffield, S
Dick, RD
Thadhani, NN
AF Jordan, Jennifer L.
Dattelbaum, Dana
Ferranti, Louis
Sutherland, Gerrit
Baer, Mel
Richards, Wayne
Sheffield, Stephen
Dick, Richard D.
Thadhani, Naresh N.
BE Elert, ML
Buttler, WT
Furnish, MD
Anderson, WW
Proud, WG
TI SHOCK EQUATION OF STATE OF SINGLE CONSTITUENT AND MULTI-CONSTITUENT
EPOXY-BASED PARTICULATE COMPOSITES
SO SHOCK COMPRESSION OF CONDENSED MATTER - 2009, PTS 1 AND 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 16th Conference of the American-Physical-Society-Topical-Group on Shock
Compression of Condensed Matter
CY JUN 28-JUL 03, 2009
CL Nashville, TN
SP Amer Phys Soc, Topical Grp
DE epoxy particulate composites; Hugoniot; mixture model
ID MIXTURE THEORY; HIGH-PRESSURE; TRANSITION; RESIN
AB There are several studies in the literature regarding the equation of state of alumina-epoxy composites. Although this single component system interacts in a complex manner with shock waves, the addition of a second metal or ceramic particulate can result in even more complex interactions. This paper presents a review of shock loading studies on epoxy-based particulate composites. The relationship between equation of state parameters and particulate concentration is investigated. The measured shock properties are compared with a mixture model for two and three phases.
C1 [Jordan, Jennifer L.; Richards, Wayne] USAF, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
[Dattelbaum, Dana; Sheffield, Stephen] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Ferranti, Louis] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Sutherland, Gerrit] USN, Surface Warfare Ctr, Potomac, MA USA.
[Baer, Mel] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Dick, Richard D.] Shocks Unlimited, Albuquerque, NM USA.
[Thadhani, Naresh N.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RP Jordan, JL (reprint author), USAF, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
OI Jordan, Jennifer/0000-0002-4596-5872
NR 17
TC 1
Z9 2
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0732-9
J9 AIP CONF PROC
PY 2009
VL 1195
BP 1253
EP +
PG 2
WC Physics, Condensed Matter
SC Physics
GA BOG48
UT WOS:000276574100296
ER
PT B
AU Josyula, E
Bailey, WF
AF Josyula, E.
Bailey, W. F.
BE Hannemann, K
Seiler, F
TI Modelling dissociation in hypersonic blunt body and nozzle flows in
thermochemical nonequilibrium
SO SHOCK WAVES, VOL 1, PROCEEDINGS
LA English
DT Proceedings Paper
CT 26th International Symposium on Shock Waves
CY JUL 15-20, 2007
CL Gottingen, GERMANY
SP German Aerosp Ctr, French German Res Inst St Louis
AB The generalized depletion equations, considering state-to-state kinetics of dissociating nitrogen, are solved to predict the extent of vibrational depletion in the temperature range of 3000-10000 K for hypersonic blunt body flows, where the translational temperature is higher than vibrational temperature (T > T-nu) in the shock layer. The prediction of nonequilibrium dissociation rates using the vibration-dissociation coupling model are significantly lower than the Park's two-temperature model rates and helps explain the restricted success of the Park's dissociation model in certain temperature ranges of hypersonic flow past a blunt body. Unlike the blunt body flows, energy transfers in expanding nozzle flows occurs for a vibrational temperature much higher than the translational temperature (T-nu > T) and the vibrational population experiences an enhancement.
C1 [Josyula, E.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Bailey, W. F.] US Air Force, Air Force Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Josyula, E (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 7
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
BN 978-3-540-85167-7
PY 2009
BP 653
EP +
DI 10.1007/978-3-540-85168-4_105
PG 2
WC Chemistry, Physical; Energy & Fuels; Engineering, Mechanical
SC Chemistry; Energy & Fuels; Engineering
GA BKZ44
UT WOS:000269686200105
ER
PT J
AU Ferrara, M
Arnold, G
AF Ferrara, Matthew
Arnold, Gregory
TI Shape and Motion Estimation from Near-Field Echo-Based Sensor Data
SO SIAM JOURNAL ON IMAGING SCIENCES
LA English
DT Article
DE near-field Euclidean invariants; geometric-invariant theory;
object-image relations; structure from motion; alternate navigation
ID SYNTHETIC-APERTURE RADAR; SIGNALS
AB This paper presents a new approach for reconstructing both shape and motion from data collected by echo-based ranging sensors. The approach is based on geometric invariant theory and exploits object-image relations for near-field (spherical-wavefront) range data. These object-image equations relate the data to a unique matrix of Euclidean invariants that completely describe the object shape. The object-image relations can be used to determine the shape of a scene viewed from unknown vantage points. Specifically, the object-image equations form a linear system of equations whose solution determines the relevant shape parameters for a configuration of features within the scene. Once the shape parameters are estimated, a single shape exemplar from the point in shape space can be used to determine the relative motion (up to an arbitrary rotation) between the sensor and the object. One advantage of this motion-estimation approach is that the geometric-invariant-based strategy allows us to uniquely solve the optimization problem without the need to introduce coordinate-system-dependent "nuisance" parameters. The theorems stated in this paper hold for any range-measurement sensor scenario. As an example of the utility of the given theorems, the object-image relations are used to augment noisy GPS measurements in a circular synthetic aperture radar geometry.
C1 [Ferrara, Matthew; Arnold, Gregory] USAF, Automat Target Recognit Technol Div, Res Lab, Dayton, OH 45433 USA.
RP Ferrara, M (reprint author), USAF, Automat Target Recognit Technol Div, Res Lab, 2241 Avion Circle, Dayton, OH 45433 USA.
EM matthew.ferrara@wpafb.af.mil; gregory.arnold@wpafb.af.mil
FU AFOSR laboratory; AFRL
FX A preliminary form of this paper appeared in the 2008 IASTED Signal and
Image Processing Conference Proceedings. The views expressed in this
article are those of the authors and do not reflect official policy of
the United States Air Force, Department of Defense, or the U.S.
Government. This work was supported in part by AFOSR laboratory tasks
under the direction of Arje Nachman and Jon Sjogren as well as AFRL
Sensors Directorate 6.2 project funding. This work was performed by an
employee of the U.S. Government or under U.S. Government contract. The
U.S. Government retains a nonexclusive, royalty-free license to publish
or reproduce the published form of this contribution, or allow others to
do so, for U.S. Government purposes. Copyright is owned by SIAM to the
extent not limited by these rights.
NR 26
TC 3
Z9 3
U1 0
U2 3
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1936-4954
J9 SIAM J IMAGING SCI
JI SIAM J. Imaging Sci.
PY 2009
VL 2
IS 2
BP 710
EP 729
DI 10.1137/080726161
PG 20
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Mathematics, Applied; Imaging Science & Photographic
Technology
SC Computer Science; Mathematics; Imaging Science & Photographic Technology
GA 601XO
UT WOS:000278101100015
ER
PT S
AU Cheng, L
Martin, P
Mazzola, MS
Sheridan, DC
Kelly, RL
Bondarenko, V
Morrison, S
Gray, R
Tian, G
Scofield, JD
Casady, JRB
Casady, JB
AF Cheng, L.
Martin, P.
Mazzola, M. S.
Sheridan, D. C.
Kelly, R. L.
Bondarenko, V.
Morrison, S.
Gray, R.
Tian, G.
Scofield, J. D.
Casady, J. R. B.
Casady, J. B.
BE Suzuki, A
Okumura, H
Kimoto, T
Fuyuki, T
Fukuda, K
Nishizawa, S
TI High-Temperature Static and Dynamic Reliability Study of 4H-SiC
Vertical-Channel JFETs for High-Power System Applications
SO SILICON CARBIDE AND RELATED MATERIALS 2007, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 12th International Conference on Silicon Carbide and Related Materials
CY OCT 14-19, 2007
CL Otsu, JAPAN
SP Japan Soc Appl Phys, Assoc Promot Elect, Elect & Informat Engn, Ceram Soc Japan, IEEE EDS, Kansai Chapter, IEEJ, Inst Elect, Informat & Commun Engineers, Japanese Assoc Crystal Growth, Surface Sci Soc Japan, Vacuum Soc Japan
DE High-temperature; reliability; SiC; JFETs; high-power system; HTRB;
thermal stress
AB In this work we report the most recent high-temperature long-term reliability results of the 600 V/14 A, 4H-SiC vertical-channel junction field-effect transistors (VJFETs). Two groups (A and B) devices were subjected to different thermal and electrical stresses. One device (Group A) reached 12,000 hours of continuous switching without a single failure. Four devices in Group A were thermally stressed at 250 degrees C over 4,670 hours in air, for which standard deviation of the specific on-resistance (R-ONSP) in linear region at gate bias (V-GS) of 3 V were < 4.1% throughout the entire duration time. The off-state characteristics were evaluated by high temperature reverse bias (HTRB) tests. Three devices (Group A) were biased at 50% rated BVDS at 250 degrees C for 2,278 hours. A higher reverse bias at 80 % rated BVDS was then applied to 14 devices (group B) at 200 degrees C for 1,000 hours. Variations of the leakage current were negligible throughout the entire HTRB test for all tested devices.
C1 [Cheng, L.; Mazzola, M. S.; Sheridan, D. C.; Kelly, R. L.; Bondarenko, V.; Morrison, S.; Casady, J. R. B.; Casady, J. B.] Semisouth Labs Inc, 201 Res Blvd, Starkville, MS 39759 USA.
[Martin, P.; Gray, R.; Tian, G.] Mississippi State Univ, Ctr Adv Vehicular Syst, Starkville, MS 39759 USA.
[Scofield, J. D.] WPAFB, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Cheng, L (reprint author), Semisouth Labs Inc, 201 Res Blvd, Starkville, MS 39759 USA.
EM lin.cheng@semisouth.com; pmartin@cavs.msstate.edu;
james.scofield@wpafb.af.mil
FU US Air Force Research Laboratory [FA8650-06-D-2608]
FX This work is funded by US Air Force Research Laboratory under Contract #
FA8650-06-D-2608 Delivery Order 0001.
NR 4
TC 3
Z9 3
U1 0
U2 0
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2009
VL 600-603
BP 1051
EP +
PN 1-2
PG 2
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA BIX26
UT WOS:000263555300251
ER
PT S
AU Cheng, L
Sankin, I
Bondarenko, V
Mazzola, MS
Scofield, JD
Sheridan, DC
Martin, P
Casady, JRB
Casady, JB
AF Cheng, L.
Sankin, I.
Bondarenko, V.
Mazzola, M. S.
Scofield, J. D.
Sheridan, D. C.
Martin, P.
Casady, J. R. B.
Casady, J. B.
BE Suzuki, A
Okumura, H
Kimoto, T
Fuyuki, T
Fukuda, K
Nishizawa, S
TI High-Temperature Operation of 50 A (1600 A/cm(2)), 600 V 4H-SiC
Vertical-Channel JFETs for High-Power Applications
SO SILICON CARBIDE AND RELATED MATERIALS 2007, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 12th International Conference on Silicon Carbide and Related Materials
CY OCT 14-19, 2007
CL Otsu, JAPAN
SP Japan Soc Appl Phys, Assoc Promot Elect, Elect & Informat Engn, Ceram Soc Japan, IEEE EDS, Kansai Chapter, IEEJ, Inst Elect, Informat & Commun Engineers, Japanese Assoc Crystal Growth, Surface Sci Soc Japan, Vacuum Soc Japan
DE High temperature; high current; JFET; vertical-channel; 4H-SiC; high
power
AB In this work we have demonstrated the high-temperature operations of 600 V/50 A 4H-SiC vertical-channel junction field-effect transistors (VJFETs) with an active area of 3 mm(2). Specific-on resistance (R-ONSP) in the linear region of a single die is less than 2.6 m Omega.cm(2) while the drain-source current is over 50 A under a gate bias (V-GS) of 3 V. A reverse blocking gain of 54 is obtained at gate bias ranging from -13 V to -23 V and drain-source leakage current (I-RDS) of 200 mu A. To demonstrate the use of SiC VJFETs for high-power applications, eight 3 mm(2) SiC `VJFETs are bonded in a high current 600-V module. R-ONSP in the linear region of these eight-paralleled SiC VJFETs is 2.8 m Omega.cm(2) at room temperature and increased to 5.35 m Omega.cm(2) at an ambient temperature of 175 degrees C in air, corresponding to a shift of 0.61%/degrees C from room temperature to 175 degrees C. Meanwhile, the forward current is over 360 A at room temperature and reduces to 188 A at 175 degrees C at drain-source bias (V-DS) of 5.25 V and VGS of 3 V.
C1 [Cheng, L.; Sankin, I.; Bondarenko, V.; Mazzola, M. S.; Sheridan, D. C.; Casady, J. R. B.; Casady, J. B.] Semisouth Labs Inc, 201 Res Blvd, Starkville, MS 39759 USA.
[Scofield, J. D.] Wright Patterson AFB, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Mazzola, M. S.; Martin, P.] Mississippi State Univ, Ctr Adv Vehicular Syst, Starkville, MS 39759 USA.
RP Cheng, L (reprint author), Semisouth Labs Inc, 201 Res Blvd, Starkville, MS 39759 USA.
EM lin.cheng@semisouth.com; mazzola@cavs.msstate.edu;
james.scofield@wpafb.af.mil
FU US Air Force Research Laboratory [FA8650-06-D2608]
FX This work is funded by US Air Force Research Laboratory under Contract #
FA8650-06-D2608Delivery Order 0001.
NR 5
TC 6
Z9 7
U1 0
U2 0
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2009
VL 600-603
BP 1055
EP +
PN 1-2
PG 2
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA BIX26
UT WOS:000263555300252
ER
PT S
AU Tsao, BH
Lawson, J
Scofield, J
Laing, C
Brown, J
AF Tsao, Bang-Hung
Lawson, Jacob
Scofield, James
Laing, Clinton
Brown, Jeffery
BE Suzuki, A
Okumura, H
Kimoto, T
Fuyuki, T
Fukuda, K
Nishizawa, S
TI 3D Thermal Stress Model for SiC Power Modules
SO SILICON CARBIDE AND RELATED MATERIALS 2007, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 12th International Conference on Silicon Carbide and Related Materials
CY OCT 14-19, 2007
CL Otsu, JAPAN
SP Japan Soc Appl Phys, Assoc Promot Elect, Elect & Informat Engn, Ceram Soc Japan, IEEE EDS, Kansai Chapter, IEEJ, Inst Elect, Informat & Commun Engineers, Japanese Assoc Crystal Growth, Surface Sci Soc Japan, Vacuum Soc Japan
DE SiC Power Module; Finite Element Analysis (FEA); Thermal Stress
AB Three dimensional models of both single-chip and multiple-chip power sub-modules were generated using ANSYS in order to simulate the effects of various substrate materials, heat fluxes, heat transfer coefficients, and device placement configurations on temperature and thermal stress contours. Alumina, aluminum-nitride, and CVD diamond were compared as substrates. Heat fluxes of 100 to 500 watts/cm(2) resulted in SiC device junction temperatures in the range of 350 to 650 K. The predicted maximum operating temperature for a chip, to which 300 wattS/cm(2) of heat flux was applied, would be 239 degrees C (512 K). In the applied heat flux range, the minimum and maximum Von Mises stress of a simulated single SiC device sub-module was between 1.2 MPa to 2.4 GPa. The maximum shear stress at 300 watts/cm(2) was predicted to be 243 MPa. Both the maximum and minimum chip temperature decreased with increasing heat transfer coefficient from 25 to 2500 watts/m(2) K. With modest cooling, represented by a heat transfer coefficient (hconv) of 250 watts/m(2) K, SiC chips operated at 300 watts/cm(2) power density maintained junction temperatures T-j < 400 K. If consistent with simulation results, CVD diamond integrated substrates should be superior to those comprised of AlN or Al2O3. Asymmetric device placement in the multi-chip module proved more effective at avoiding potential hot spots than the symmetric configuration.
C1 [Tsao, Bang-Hung; Lawson, Jacob] Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
[Scofield, James; Brown, Jeffery] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Laing, Clinton] Program Management Off, Magna, UT 84044 USA.
RP Tsao, BH (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
EM bang.tsao@wpafb.af.mil; jacob.lawson@wpafb.af.mil;
james.scofield@wpafb.af.mil; clinton.laing@ssp.navy.mil;
jeffery.brown@wpafb.af.mil
FU Propulsion Directorate, Air Force Research Laboratory [FA8650-04-D-2403,
13]
FX This work was supported by the Propulsion Directorate, Air Force
Research Laboratory, under contract no. FA8650-04-D-2403(DO#13).
NR 3
TC 0
Z9 0
U1 0
U2 1
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2009
VL 600-603
BP 1227
EP +
PN 1-2
PG 2
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA BIX26
UT WOS:000263555300295
ER
PT J
AU Fogler, KA
Glidewell, R
Zumas, B
Shanes, E
Dyche, J
AF Fogler, K. A.
Glidewell, R.
Zumas, B.
Shanes, E.
Dyche, J.
TI EARLY REM ONSET IN A NATURALLY OCCURRING SLEEP DEPRIVED POPULATION
SO SLEEP
LA English
DT Meeting Abstract
CT 23rd Annual Meeting of the Associated-Professional-Sleep-Societies
CY JUN 06-11, 2009
CL Seattle, WA
SP Associated Profess Sleep Soc
C1 [Fogler, K. A.; Zumas, B.; Shanes, E.; Dyche, J.] USAF Acad, Colorado Springs, CO 80840 USA.
[Fogler, K. A.] St Louis Univ, St Louis, MO 63103 USA.
[Glidewell, R.] Lynn Inst Rockies, Colorado Springs, CO USA.
[Zumas, B.] Univ Colorado, Colorado Springs, CO 80907 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2009
VL 32
MA 448
BP A148
EP A148
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 438FT
UT WOS:000265542000450
ER
PT J
AU Fogler, KA
Hiveley, EM
Dyche, J
AF Fogler, K. A.
Hiveley, E. M.
Dyche, J.
TI DO EARLY BED/WAKE TIMES IMPROVE HEALTH AND GRADES IN A MILITARY SETTING?
SO SLEEP
LA English
DT Meeting Abstract
CT 23rd Annual Meeting of the Associated-Professional-Sleep-Societies
CY JUN 06-11, 2009
CL Seattle, WA
SP Associated Profess Sleep Soc
C1 [Fogler, K. A.; Hiveley, E. M.; Dyche, J.] USAF Acad, Colorado Springs, CO 80840 USA.
[Fogler, K. A.] St Louis Univ, St Louis, MO 63103 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2009
VL 32
MA 396
BP A131
EP A131
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 438FT
UT WOS:000265542000398
ER
PT J
AU Jonelis, MB
Thoreson, K
McKenna, B
Salamat, J
Drummond, SP
AF Jonelis, M. B.
Thoreson, K.
McKenna, B.
Salamat, J.
Drummond, S. P.
TI INDIVIDUAL DIFFERENCES IN RESPONSE TO SLEEP DEPRIVATION ON 3 DISTINCT
COGNITIVE TASKS
SO SLEEP
LA English
DT Meeting Abstract
CT 23rd Annual Meeting of the Associated-Professional-Sleep-Societies
CY JUN 06-11, 2009
CL Seattle, WA
SP Associated Profess Sleep Soc
C1 [Jonelis, M. B.] Univ Calif San Francisco, Sch Med, San Francisco, CA USA.
[Jonelis, M. B.; Thoreson, K.; McKenna, B.; Salamat, J.] VA San Diego Healthcare Syst, Res Serv, San Diego, CA USA.
[Drummond, S. P.] VA San Diego Healthcare Syst, Psychol Serv, San Diego, CA USA.
[Thoreson, K.] San Diego State Univ, San Diego, CA 92182 USA.
[Drummond, S. P.] Univ Calif San Diego, San Diego, CA USA.
[McKenna, B.] SDSU UCSD, Joint Doctoral Program Clin Psychol, San Diego, CA USA.
[Thoreson, K.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2009
VL 32
MA 0418
BP A138
EP A138
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 438FT
UT WOS:000265542000420
ER
PT J
AU Rosenthal, L
Dolan, DC
AF Rosenthal, L.
Dolan, D. C.
TI COMPARISON OF SUBJECTIVE SLEEP POSITION PREFERENCE VS. OBJECTIVE
AMBULATORY DATA
SO SLEEP
LA English
DT Meeting Abstract
CT 23rd Annual Meeting of the Associated-Professional-Sleep-Societies
CY JUN 06-11, 2009
CL Seattle, WA
SP Associated Profess Sleep Soc
C1 [Rosenthal, L.] Sleep Med Associates Texas, Dallas, TX USA.
[Dolan, D. C.] Univ N Texas, Denton, TX 76203 USA.
[Dolan, D. C.] Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2009
VL 32
MA 1185
BP A387
EP A387
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 438FT
UT WOS:000265542001531
ER
PT J
AU Thoreson, K
Jonelis, M
Drummond, S
AF Thoreson, K.
Jonelis, M.
Drummond, S.
TI DIFFERENTIAL BENEFIT OF RECOVERY SLEEP FOR COGNITIVE PERFORMANCE BASED
ON DETERIORATION THROUGHOUT SLEEP DEPRIVATION
SO SLEEP
LA English
DT Meeting Abstract
CT 23rd Annual Meeting of the Associated-Professional-Sleep-Societies
CY JUN 06-11, 2009
CL Seattle, WA
SP Associated Profess Sleep Soc
C1 [Thoreson, K.; Jonelis, M.] VA San Diego Healthcare Syst, Res Serv, San Diego, CA USA.
[Thoreson, K.] SDSU, SDSU Masters Program Psychol, San Diego, CA USA.
[Thoreson, K.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Jonelis, M.] UCSF, UCSF Sch Med, San Francisco, CA USA.
[Jonelis, M.] Howard Hughes Med Inst, Chevy Chase, MD USA.
[Drummond, S.] VA San Diego Healthcare Syst, Psychol Serv, San Diego, CA USA.
[Drummond, S.] UCSD, Dept Psychiat, San Diego, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2009
VL 32
MA 441
BP A146
EP A146
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 438FT
UT WOS:000265542000443
ER
PT B
AU Baron, W
Zeppettella, D
AF Baron, William
Zeppettella, David
GP ASME
TI MULTIFUNCTIONAL AIRFRAME STRUCTURE FOR ENERGY STORAGE USING A LOAD
BEARING COAXIAL CAPACITOR
SO SMASIS2008: PROCEEDINGS OF THE ASME CONFERENCE ON SMART MATERIALS,
ADAPTIVE STRUCTURES AND INTELLIGENT SYSTEMS - 2008, VOL 1
LA English
DT Proceedings Paper
CT Conference on Smart Materials, Adaptive Structures and Intelligent
Systems
CY OCT 28-30, 2008
CL Ellicot, MD
SP ASME, Nanotechnol Inst
AB Future directed energy systems may offer affordable, sustainable and scalable application of force to support emerging airborne missions with minimal collateral damage. These systems largely depend on the development of capacitors that can be used in pulse forming, networks (PFNs) and/or Marx bank configurations for the conversion of available prime electrical energy into the necessary short and very fast pulses of energy needed to energize military device loads. Such loads may be lasers, electromagnetic guns/launchers, high power microwaves, etc. Compact, lightweight, low cost, pulse power capacitor devices are a necessity for airborne applications and space-borne systems. This paper will discuss research aspects of an innovative concept to integrate an energy storage function into load bearing airframe structure, in order to eliminate much of the parasitic weight associated with conventional pulse power systems. Current high energy capacitors can weigh in the thousands of pounds as shown in Figure 1. For an airborne application this can have a significant effect on the size and take off gross weight of the aircraft. If small aircraft will be used in future directed energy systems, significant improvements in weight efficiency are necessary.
Structural capacitor implies that the aircraft/spacecraft structure carries load and also provides a means of maintaining capacitive charge for energy storage and power conditioning in a variety of applications, both pulsed and continuous. The specific objective of this effort is to demonstrate feasibility of a plausible design concept, by conducting a series of experimental trials to characterize the structural and electrical efficiency of the concept.
C1 [Baron, William; Zeppettella, David] USAF, Res Lab, Struct Concepts Branch, Wright Patterson AFB, OH 45433 USA.
RP Baron, W (reprint author), USAF, Res Lab, Struct Concepts Branch, Wright Patterson AFB, OH 45433 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4331-4
PY 2009
BP 677
EP 682
PG 6
WC Computer Science, Artificial Intelligence; Engineering, Mechanical;
Materials Science, Multidisciplinary
SC Computer Science; Engineering; Materials Science
GA BJE63
UT WOS:000265211900081
ER
PT B
AU Tandon, GP
Goecke, K
Cable, K
Baur, J
AF Tandon, G. P.
Goecke, K.
Cable, K.
Baur, J.
GP ASME
TI DURABILITY ASSESSMENT OF FABRIC-REINFORCED SHAPE-MEMORY POLYMER
COMPOSITES
SO SMASIS2009, VOL 1
LA English
DT Proceedings Paper
CT 2nd Annual ASME Conference on Smart Materials, Adaptive Structures and
Intelligent Systems
CY SEP 21-23, 2009
CL Oxnard, CA
SP ASME, AIAA
ID POLYURETHANE SERIES; FILM
AB The present study is a baseline assessment of the environmental durability of current state-of-the-art, fabric-reinforced shape memory materials being considered for morphing applications. Tensile dog-bone-shaped specimens are cut along three different directions, namely, along 0 degrees, perpendicular (90), and at 45 degrees to the orientation of the fabric. The shape memory properties and elastomeric response before and after relevant environmental exposure to water at 49 degrees C for 4 days, in lube oil at room temperature and at 49 degrees C for 24 hours, and after exposure to Xenon Arc (63 degrees C, 18 minutes water and light! 102 minutes light only) and spectral intensity of 0.3 to 0.4 watts/m(2) for 125 cycles (250 hours exposure time) are measured. Weight loss of the as-received and conditioned specimens is monitored while the dog-bone-shaped specimens are subjected to recovery following fixation. Parameters being investigated include stored strain, recovery stress, shape fixity, shape recovery, and modulus in the glassy and rubbery state.
C1 [Tandon, G. P.; Goecke, K.; Baur, J.] USAF, Res Lab, Mat & Mfg Directorate, AFRL RXBC, Wright Patterson AFB, OH 45433 USA.
RP Tandon, GP (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL RXBC, Wright Patterson AFB, OH 45433 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4896-8
PY 2009
BP 23
EP 32
PG 10
WC Engineering, Mechanical
SC Engineering
GA BRH75
UT WOS:000282725500004
ER
PT J
AU White, TJ
Bricker, RL
Natarajan, LV
Serak, SV
Tabiryan, NV
Bunning, TJ
AF White, Timothy J.
Bricker, Rebecca L.
Natarajan, Lalgudi V.
Serak, Svetlana V.
Tabiryan, Nelson V.
Bunning, Timothy J.
TI Polymer stabilization of phototunable cholesteric liquid crystals
SO SOFT MATTER
LA English
DT Article
ID CHIRAL AZOBENZENE MOLECULES; SWITCHABLE MIRRORS; LIGHT-REFLECTION; BAND;
PITCH; PHOTOISOMERIZATION; FILMS; HOST; GELS
AB Prior examinations of azobenzene-based cholesteric liquid crystals (azo-CLCs) have primarily focused on light-directed tuning of the photonic bandgap, with particular attention paid to the magnitude of the shift of the reflection (tuning range). One potential limitation of these materials is the days-long dark restoration of the CLC from the photodisplaced spectra. This work demonstrates that polymer stabilization of azo-CLCs can dramatically reduce the time necessary for restoration from both the photoinduced isotropic (PHI) state and the photodisplaced CLC phase to the original spectral characteristics including position, bandwidth, and reflectivity. Specifically, an unstabilized azo-CLC takes 70 h to restore from the PHI state while a polymer stabilized azo-CLC regenerates the CLC phase in minutes and restores the original spectrum in a couple of hours. It is established herein that polymerization in the CLC phase is of critical importance to the restoration of highly reflective azo-CLC to the original spectral state (position, reflectivity, bandwidth, and baseline transmission). Polymerization in the CLC phase templates the polymer network with the original pitch which effectively guides the restoration of the azo-CLC helix from the photodisplaced state (isotropic or CLC). This work is another step toward the development of light-directed CLC devices capable of direct on-off binary optical switching or instantaneous tuning/relaxation, with potential applications in lasing, photonics, and imaging.
C1 [White, Timothy J.; Bricker, Rebecca L.; Natarajan, Lalgudi V.; Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Bricker, Rebecca L.] SOCHE, Dayton, OH USA.
[Natarajan, Lalgudi V.] SAIC, Dayton, OH USA.
[Serak, Svetlana V.; Tabiryan, Nelson V.] BEAM Engn Adv Measurements, Winter Pk, FL USA.
RP White, TJ (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.white2@wpafb.af.mil; timothy.bunning@wpafb.af.mil
RI White, Timothy/D-4392-2012
NR 34
TC 24
Z9 24
U1 3
U2 23
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1744-683X
EI 1744-6848
J9 SOFT MATTER
JI Soft Matter
PY 2009
VL 5
IS 19
BP 3623
EP 3628
DI 10.1039/b906758b
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Multidisciplinary; Polymer Science
SC Chemistry; Materials Science; Physics; Polymer Science
GA 498DQ
UT WOS:000270117400012
ER
PT J
AU Lee, CO
Luhmann, JG
Odstrcil, D
MacNeice, P
de Pater, I
Riley, P
Arge, CN
AF Lee, C. O.
Luhmann, J. G.
Odstrcil, D.
MacNeice, P. J.
de Pater, I.
Riley, P.
Arge, C. N.
TI The Solar Wind at 1 AU During the Declining Phase of Solar Cycle 23:
Comparison of 3D Numerical Model Results with Observations
SO SOLAR PHYSICS
LA English
DT Article
DE Solar Wind; Solar Cycle, Models; Solar cycle, Observations; Magnetic
fields, Models; Magnetic fields, Interplanetary
ID INTERPLANETARY MAGNETIC-FIELD; MHD MODEL; PRIMARY MISSION; EVOLUTION;
HELIOS-1; DYNAMICS; SYSTEM; CORONA
AB We present results of solar-wind parameters generated by 3D MHD models. The ENLIL inner-heliosphere solar-wind model together with the MAS or Wang-Sheeley-Arge (WSA) coronal models, describe the steady solar-wind stream structure and its origins in the solar corona. The MAS/ENLIL and WSA/ENLIL models have been tuned to provide a simulation of plasma moments as well as interplanetary magnetic-field magnitude and polarity in the absence of disturbances from coronal transients. To investigate how well the models describe the ambient solar wind structure from the Sun out to 1 AU, the model results are compared to solar-wind measurements from the ACE spacecraft. We find that there is an overall agreement between the observations and the model results for the general large-scale solar-wind structures and trends, such as the timing of the high-density structures and the low- and high-speed winds, as well as the magnetic sector structures. The time period of our study is the declining phase of Solar Cycle 23 when the solar activity involves well-defined stream structure, which is ideal for testing a quasi-steady-state solar-wind model.
C1 [Lee, C. O.; Luhmann, J. G.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Lee, C. O.; de Pater, I.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
[Odstrcil, D.] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[MacNeice, P. J.] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA.
[Riley, P.] Sci Applicat Int Corp, San Diego, CA 92121 USA.
[Arge, C. N.] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
RP Lee, CO (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
EM clee@ssl.berkeley.edu; jgluhman@ssl.berkeley.edu;
Dusan.Odstrcil@noaa.gov; Peter.J.MacNeice@nasa.gov;
imke@astron.berkeley.edu; pete.riley@saic.com; nick.arge@kirtland.af.mil
RI MacNeice, Peter/F-5587-2012;
OI Lee, Christina/0000-0002-1604-3326
FU National Defense Science and Engineering Graduate (NDSEG) Fellowship;
Department of Defense (DoD) and the CISM; STC Program of the National
Science Foundation [ATM-0120950]
FX This research was supported by the 2005-2006 National Defense Science
and Engineering Graduate (NDSEG) Fellowship awarded by the Department of
Defense (DoD) and the CISM project, which is funded by the STC Program
of the National Science Foundation under agreement number ATM-0120950.
NR 45
TC 37
Z9 42
U1 0
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
J9 SOL PHYS
JI Sol. Phys.
PD JAN
PY 2009
VL 254
IS 1
BP 155
EP 183
DI 10.1007/s11207-008-9280-y
PG 29
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 382AN
UT WOS:000261577100010
ER
PT S
AU Fernelius, NC
Wang, X
Tang, YJ
Tang, SN
AF Fernelius, Nils C.
Wang, X.
Tang, Yuanji
Tang, Suning
BE Clarkson, WA
Hodgson, N
Shori, RK
TI Comparative studies of Nd:YxGd1-xVO4 laser with direct and indirect
pumping
SO SOLID STATE LASERS XVIII: TECHNOLOGY AND DEVICES
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Solid State Lasers XVIII - Technology and Devices
CY JAN 25-29, 2009
CL San Jose, CA
SP SPIE, Coherent Inc
DE solid state lasers; mixed vanadate crystals; direct excitation; indirect
excitation; laser efficiency
ID END-PUMPED LASER; ND-YAG; CRYSTALS; PERFORMANCE; OPERATION; MIRROR;
ARRAY
AB We comparatively studied laser performance in the mixed vanadate crystals Nd:YxGd1-xVO4 with direct and indirect pumping. The maximum CW output power at 1064 nm was measured to be 6.6 W with 12 W direct 880 nm laser diode pumping, and 4.4 W with 8.8 W indirect 808 nm pumping. The optical conversion efficiency depended on the mixture ratio (x), pumping wavelength (direct or indirect), and pumping power. The hightest optical efficiency of 59% and slope efficiency of 74% were achived.
C1 [Fernelius, Nils C.] AFRL RXPSO, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Fernelius, NC (reprint author), AFRL RXPSO, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 20
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7439-1
J9 PROC SPIE
PY 2009
VL 7193
AR 71930M
DI 10.1117/12.805618
PG 10
WC Instruments & Instrumentation; Optics
SC Instruments & Instrumentation; Optics
GA BSL69
UT WOS:000284870500015
ER
PT J
AU Coletta, D
AF Coletta, Damon
BE Coletta, D
Pilch, FT
TI Thinking about space and defense Introduction
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Editorial Material; Book Chapter
C1 USAF Acad, Colorado Springs, CO 80840 USA.
RP Coletta, D (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 29
TC 3
Z9 3
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 1
EP 12
PG 12
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500002
ER
PT B
AU Murray, DJ
AF Murray, Douglas J.
BE Coletta, D
Pilch, FT
TI Space and Defense Policy Foreword
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Editorial Material; Book Chapter
C1 [Murray, Douglas J.] USAF Acad, Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
[Murray, Douglas J.] USAF Acad, Dept Polit Sci, Colorado Springs, CO USA.
RP Murray, DJ (reprint author), USAF Acad, Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP XV
EP XVI
PG 2
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500001
ER
PT B
AU Lawrence, T
Saylor, WW
Siegenthaler, K
Ward, TG
AF Lawrence, Timothy
Saylor, William W.
Siegenthaler, Ken
Ward, Thomas G., Jr.
BE Coletta, D
Pilch, FT
TI Space, science, and technology
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 [Lawrence, Timothy] USAF Acad, Space Syst Res Ctr, Colorado Springs, CO 80840 USA.
[Lawrence, Timothy] USAF Acad, Dept Astronaut, Nav Guidance & Control Div, Colorado Springs, CO 80840 USA.
RP Lawrence, T (reprint author), USAF Acad, Space Syst Res Ctr, Colorado Springs, CO 80840 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 27
EP 50
PG 24
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500004
ER
PT B
AU Linster, B
AF Linster, Bruce
BE Coletta, D
Pilch, FT
TI Space and the economy
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 USAF Acad, Colorado Springs, CO 80840 USA.
RP Linster, B (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 51
EP 63
PG 13
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500005
ER
PT B
AU Graham, T
Huskisson, D
AF Graham, Tom
Huskisson, Darren
BE Coletta, D
Pilch, FT
TI Cooperation in space International institutions
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 [Huskisson, Darren] USAF Acad, Colorado Springs, CO USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 104
EP 124
PG 21
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500007
ER
PT B
AU Sadeh, E
Vallance, B
AF Sadeh, Eligar
Vallance, Brenda
BE Coletta, D
Pilch, FT
TI The policy process
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 [Sadeh, Eligar] USAF Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
[Sadeh, Eligar] Univ N Dakota, Sch Aerosp Sci, Grand Forks, ND 58201 USA.
[Vallance, Brenda] St Edwards Univ, Sch Behav & Social Sci, Austin, TX 78704 USA.
RP Sadeh, E (reprint author), USAF Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
NR 32
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 125
EP 149
PG 25
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500008
ER
PT B
AU Green, SG
Heppard, KA
Tremaine, RL
AF Green, Steve G.
Heppard, Kurt A.
Tremaine, Robert L.
BE Coletta, D
Pilch, FT
TI The acquisition process Acquiring technology for space and defense
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 [Green, Steve G.; Heppard, Kurt A.] USAF Acad, MILSTAR Satellite Program, Colorado Springs, CO 80840 USA.
RP Green, SG (reprint author), USAF Acad, MILSTAR Satellite Program, Colorado Springs, CO 80840 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 231
EP 243
PG 13
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500011
ER
PT B
AU Harrison, RG
AF Harrison, Roger G.
BE Coletta, D
Pilch, FT
TI Space and Defense Policy Conclusion
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Editorial Material; Book Chapter
C1 [Harrison, Roger G.] USAF Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
RP Harrison, RG (reprint author), USAF Acad, Eisenhower Ctr Space & Def Studies, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 329
EP 335
PG 7
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500016
ER
PT B
AU Arnold, P
AF Arnold, Preston
BE Coletta, D
Pilch, FT
TI Landmarks in US space policy
SO SPACE AND DEFENSE POLICY
SE Space Power and Politics
LA English
DT Article; Book Chapter
C1 [Arnold, Preston] USAF Acad, Dept Polit Sci, Colorado Springs, CO USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-88306-8
J9 SPACE POWER POLIT
PY 2009
BP 336
EP 343
PG 8
WC International Relations; Political Science
SC International Relations; Government & Law
GA BNL06
UT WOS:000274836500017
ER
PT S
AU Elston, LJ
Yerkes, KL
Thomas, SK
McQuillen, J
AF Elston, Levi J.
Yerkes, Kirk L.
Thomas, Scott K.
McQuillen, John
BE Robertson, GA
TI Qualitative Evaluation of a Liquid-Vapor Separator Concept in
Micro-Gravity Conditions
SO SPACE, PROPULSION & ENERGY SCIENCES INTERNATIONAL FORUM SPESIF-2009
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Conference on Thermophysics Applications in Microgravity/6th
Symposium on New Frontiers in Space Propulsion Sciences/1st Symposium on
Astrosociology
CY FEB 24-26, 2009
CL Huntsville, AL
SP Amer Astronaut Soc, Amer Inst Aeronaut & Astronaut, Astrosociol Res Inst
DE Liquid-Vapor Separator; Micro-Gravity Fluid Physics; Phase Separator
AB An innovative liquid-vapor separator design has been incorporated into a spray cooling experiment, which was flown recently on the NASA C-9 reduced gravity aircraft. This design is the latest in a series of designs that have been flown in microgravity and elevated gravity in relation to an experimental investigation into spray cooling performance with regard to possible application to high-performance aircraft undergoing combat maneuvers. Initially, significant problems occurred during flight testing due to the inability of the reservoir to separate the liquid coolant from the vapor under microgravity conditions, which resulted in a loss of coolant to the simulated electronic device that was being spray cooled. Improvements in the design of the liquid-vapor separator are described in this paper, and experimental data showing the performance of several generations of liquid-vapor separators are presented. The final separator design went through more rigorous evaluation to compare performance at multiple fill levels, each with a higher percentage of vapor space within the reservoir. It was found that, using the final reservoir design, stable flow operation was achieved in micro-gravity for mass flow rates of m (over dot) = 14, 17.5, and 21 [g/s].
C1 [Elston, Levi J.; Yerkes, Kirk L.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Elston, LJ (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM levi.elston@us.af.mil
NR 10
TC 1
Z9 1
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0639-1
J9 AIP CONF PROC
PY 2009
VL 1103
BP 3
EP 13
PG 11
WC Engineering, Aerospace; Astronomy & Astrophysics; Energy & Fuels
SC Engineering; Astronomy & Astrophysics; Energy & Fuels
GA BJG15
UT WOS:000265592900001
ER
PT S
AU Miley, GH
Momota, H
Wu, LC
Reilly, MP
Teofilo, VL
Burton, R
Dell, R
Dell, D
Hargus, WA
AF Miley, George H.
Momota, Hiromu
Wu, Linchun
Reilly, Michael P.
Teofilo, Vince L.
Burton, Rodney
Dell, Richard
Dell, Dick
Hargus, William A.
BE Robertson, GA
TI IEC Thrusters for Space Probe Applications and Propulsion
SO SPACE, PROPULSION & ENERGY SCIENCES INTERNATIONAL FORUM SPESIF-2009
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Conference on Thermophysics Applications in Microgravity/6th
Symposium on New Frontiers in Space Propulsion Sciences/1st Symposium on
Astrosociology
CY FEB 24-26, 2009
CL Huntsville, AL
SP Amer Astronaut Soc, Amer Inst Aeronaut & Astronaut, Astrosociol Res Inst
DE Space Thruster; Inertial Electrostatic Confinement; Fusion Thruster;
Plasma Thruster
ID FUSION
AB Earlier conceptual design studies (Bussard, 1990; Miley el al., 1998; Burton el al., 2003) have described Inertial Electrostatic Confinement (IEC) fusion propulsion to provide a high-power density fusion propulsion system capable of aggressive deep space missions. However, this requires large multi-GW thrusters and a long term development program. As a first step towards this goal, a progression of near-term IEC thrusters, stating with a 1-10 kWe electrically-driven IEC jet thruster for satellites are considered here. The initial electrically-powered unit uses a novel multi-jet plasma thruster based on spherical IEC technology with electrical input power from a solar panel. In this spherical configuration, Xe ions are generated and accelerated towards the center of double concentric spherical grids. An electrostatic potential well structure is created in the central region, providing ion trapping. Several enlarged grid opening extract intense quasi-neutral plasma jets. A variable specific impulse in the range of 1000-4000 seconds is achieved by adjusting the grid potential. This design provides high maneuverability for satellite and small space probe operations. The multiple jets, combined with gimbaled auxiliary equipment, provide precision changes in thrust direction. The IEC electrical efficiency can match or exceed efficiencies of conventional Hall Current Thrusters (HCTs) while offering advantages such as reduced grid erosion (long life time), reduced propellant leakage losses (reduced fuel storage), and a very high power-to-weight ratio. The unit is ideally suited for probing missions. The primary propulsive jet enables delicate maneuvering close to an object. Then simply opening a second jet offset 180 degrees from the propulsion one provides a "plasma analytic probe" for interrogation of the object.
The technology underlying this electrically-driven jet unit leads naturally to a next generation fusion driven unit. For example, a low-Q version of one of the modules designed for the magnetically-channeled IEC trap array propulsion plant (Miley and Wu, 2007) could be used for next generation power units to replace current HCTs. These commonly generate 0.2 - 1.0 Newton's of thrust and 3-12 kWe for LEO or MEO to GEO orbit transfer as well as station keeping or orbit plane changes. The fusion IEC version offers major advances in system power density and eliminates use of increasingly scarce fuels like Xe. A feature of the IEC type fusion device is its non-Maxwellian operation, enabling use of advanced fuels such as the D-He employed in the Space Ship I I design (Burton et al., 2003). p-B11, such as used in (Bussard, 1990), represents an ultimate goal. Such units would initially be for large orbiting satellites, and then scaled up for use as a power/propulsion unit for a manned Mars or beyond interplanetary spacecraft.
C1 [Miley, George H.; Momota, Hiromu; Wu, Linchun; Reilly, Michael P.] Univ Illinois, Dept Nucl Plasma & Radiol Engn, Urbana, IL 61801 USA.
[Teofilo, Vince L.] Lockheed Martin Sp Syst Co, Adv Technol Ctr, Palo Alto, CA USA.
[Burton, Rodney] Univ Illinois, Dept Aerosp Engn, Urbana, IL USA.
[Dell, Richard; Dell, Dick] Adv Aerosp Res Ctr AARC, Raleigh, NC USA.
[Hargus, William A.] Edwards AFB, Air Force Res Lab, Palmdale, CA USA.
RP Miley, GH (reprint author), Univ Illinois, Dept Nucl Plasma & Radiol Engn, Urbana, IL 61801 USA.
EM ghmiley@illinois.edu
NR 22
TC 2
Z9 2
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0639-1
J9 AIP CONF PROC
PY 2009
VL 1103
BP 164
EP 174
PG 11
WC Engineering, Aerospace; Astronomy & Astrophysics; Energy & Fuels
SC Engineering; Astronomy & Astrophysics; Energy & Fuels
GA BJG15
UT WOS:000265592900020
ER
PT S
AU Stanton, SA
Marchand, BG
AF Stanton, Stuart A.
Marchand, Belinda G.
BE Segerman, AM
Lai, PC
Wilkins, MP
Pittelkau, ME
TI FINITE SET CONTROL TRANSCRIPTION FOR OPTIMAL CONTROL APPLICATIONS
SO SPACEFLIGHT MECHANICS 2009, VOL 134, PTS I-III
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA 19th Space Flight Mechanics Meeting
CY FEB 08-12, 2009
CL Savannah, GA
SP AAS, AIAA
ID HYBRID SYSTEMS
AB Previous efforts explore an enhanced collocation method designed to treat optimal control applications in which control variables are constrained to finite sets of values. Presently, the method is applied to several aerospace control problems to demonstrate its utility and capability. On-off actuation schemes are ideally represented with constrained control. The behavior of variable-thrust actuators is modeled by limiting control change rates to a finite space. Solutions derived are characterized as optimal switching schedules between feasible control values. The methodology allows control switches to be determined over a continuous spectrum, overcoming many of the limitations associated with discretized solutions.
C1 [Stanton, Stuart A.] USAF, Wright Patterson AFB, OH 45433 USA.
RP Stanton, SA (reprint author), USAF, Wright Patterson AFB, OH 45433 USA.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-554-1
J9 ADV ASTRONAUT SCI
PY 2009
VL 134
BP 307
EP 326
PN I-III
PG 20
WC Engineering, Aerospace
SC Engineering
GA BOE66
UT WOS:000276394400019
ER
PT S
AU Crouse, B
Zanetti, R
D'Souza, C
Spanos, PD
AF Crouse, Brian
Zanetti, Renato
D'Souza, Chris
Spanos, Pol D.
BE Segerman, AM
Lai, PC
Wilkins, MP
Pittelkau, ME
TI AUTONOMOUS OPTICAL LUNAR NAVIGATION
SO SPACEFLIGHT MECHANICS 2009, VOL 134, PTS I-III
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA 19th Space Flight Mechanics Meeting
CY FEB 08-12, 2009
CL Savannah, GA
SP AAS, AIAA
AB The performance of optical autonomous navigation is investigated for spacecraft in low lunar orbits and highly elliptical lunar orbits. Various options for employing the camera measurements are presented and compared. Strategies for improving navigation performance are developed and applied to the Orion vehicle lunar mission.
C1 [Crouse, Brian] USAF, Wright Patterson AFB, OH 45433 USA.
RP Crouse, B (reprint author), USAF, Wright Patterson AFB, OH 45433 USA.
EM bcrouse@draper.com; rzanetti@draper.com; chris.dsouza@nasa.gov;
spanos@rice.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-554-1
J9 ADV ASTRONAUT SCI
PY 2009
VL 134
BP 327
EP 341
PN I-III
PG 15
WC Engineering, Aerospace
SC Engineering
GA BOE66
UT WOS:000276394400020
ER
PT S
AU Wetterer, CJ
Jah, M
AF Wetterer, Charles J.
Jah, Moriba
BE Segerman, AM
Lai, PC
Wilkins, MP
Pittelkau, ME
TI ATTITUDE DETERMINATION FROM LIGHT CURVES VIA UNSCENTED KALMAN FILTERING
SO SPACEFLIGHT MECHANICS 2009, VOL 134, PTS I-III
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA 19th Space Flight Mechanics Meeting
CY FEB 08-12, 2009
CL Savannah, GA
SP AAS, AIAA
AB A quaternion-based unscented Kalman filter (UKF) was used to recover attitude parameters and body rates for a simulated object of known shape and surface characteristics by reducing the light curve (observed brightness as a function of time) of a specific object. Synthetic data were generated for a sunlit cylinder in a geosynchronous transfer orbit, as observed from a specific ground site and corrupted by a white noise process. The light curve data were then reduced by the UKF (using the same observation model as the one which generated the synthetic measurements) to recover the attitude and rotation rate of the cylinder. The results were then compared to the known truth data as a means of quantifying filter performance.
C1 [Wetterer, Charles J.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Wetterer, CJ (reprint author), USAF Acad, Dept Phys, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-554-1
J9 ADV ASTRONAUT SCI
PY 2009
VL 134
BP 1567
EP 1584
PN I-III
PG 18
WC Engineering, Aerospace
SC Engineering
GA BOE66
UT WOS:000276394400095
ER
PT S
AU Jorris, TR
Schulz, CS
Rexius, S
AF Jorris, Timothy R.
Schulz, Christopher S.
Rexius, Shawn
BE Segerman, AM
Lai, PC
Wilkins, MP
Pittelkau, ME
TI IMPROVEMENTS IN PSEUDOSPECTRAL BASED HYPERSONIC VEHICLE TRAJECTORY
GENERATION VIA ENHANCED AEROTHERMAL PREDICTION METHODS
SO SPACEFLIGHT MECHANICS 2009, VOL 134, PTS I-III
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA 19th Space Flight Mechanics Meeting
CY FEB 08-12, 2009
CL Savannah, GA
SP AAS, AIAA
AB Hypersonic vehicle re-entry trajectories are traditionally formulated as a constrained two point boundary value problem which consider a variety of problem related path constraints. The solutions to these two point boundary value problems are found by employing numerical optimization techniques such as the accelerated projected gradient method or pseudospectral optimization techniques. Initial, terminal, and path constraints are used to describe the problem to be analyzed and are generally problem specific. For extended endoatmospheric hypersonic flight, the total aerothermal heat and heat flux imparted on the flight vehicle becomes a critical path constraint to consider when generating an optimal trajectory solution. Heat calculations used in these cases, however, tend to be simplified to closed form representation that solely consider stagnation heating to limit the constraint complexity. The Gauss pseudospectral optimization method has been shown to provide excellent solution convergence for highly constrained trajectory problems. This paper evaluates the performance of the Gauss pseudospectral optimization method in generating long flight duration hypersonic vehicle trajectories considering complex aeroheating calculations as path constraints.
C1 [Jorris, Timothy R.] USAF, Test Pilot Sch, Edwards AFB, CA 93524 USA.
RP Jorris, TR (reprint author), USAF, Test Pilot Sch, 220 S Wolfe Ave, Edwards AFB, CA 93524 USA.
EM timothy.jorris@us.af.mil
NR 21
TC 1
Z9 1
U1 0
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-554-1
J9 ADV ASTRONAUT SCI
PY 2009
VL 134
BP 1777
EP 1791
PN I-III
PG 15
WC Engineering, Aerospace
SC Engineering
GA BOE66
UT WOS:000276394400107
ER
PT B
AU Repperger, DW
Phillips, CA
AF Repperger, Daniel W.
Phillips, Chandler A.
BE Nof, SY
TI The Human Role in Automation
SO SPRINGER HANDBOOK OF AUTOMATION
LA English
DT Article; Book Chapter
ID FUNCTION ALLOCATION; SYSTEMS; TRUST; MACHINES; ROBOT; COST; PERFORMANCE;
STRATEGIES
C1 [Repperger, Daniel W.] USAF, Res Lab, Wright Patterson AFB, Dayton, OH 45433 USA.
[Phillips, Chandler A.] Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
RP Repperger, DW (reprint author), USAF, Res Lab, Wright Patterson AFB, 711 Human Performance Wing, Dayton, OH 45433 USA.
EM Daniel.repperger@wpafb.af.mil; Chandler.Phillips@wright.edu
NR 71
TC 1
Z9 1
U1 1
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
BN 978-3-540-78830-0
PY 2009
BP 295
EP 304
DI 10.1007/978-3-540-78831-7_17
D2 10.1007/978-3-540-78831-7
PG 10
WC Automation & Control Systems
SC Automation & Control Systems
GA BKW94
UT WOS:000269494300017
ER
PT B
AU Badiru, AB
AF Badiru, Adedeji B.
BA Badiru, AB
BF Badiru, AB
TI Science, Technology, and Engineering Project Methodology
SO STEP PROJECT MANAGEMENT: GUIDE FOR SCIENCE, TECHNOLOGY, AND ENGINEERING
PROJECTS
SE Industrial Innovation Series
LA English
DT Article; Book Chapter
C1 [Badiru, Adedeji B.] USAF, Dept Syst & Engn Management, Inst Technol, Dayton, OH USA.
[Badiru, Adedeji B.] Univ Tennessee, Knoxville, TN USA.
[Badiru, Adedeji B.] Univ Oklahoma, Univ Coll, Norman, OK 73019 USA.
[Badiru, Adedeji B.] Natl Sci Fdn, Arlington, VA 22230 USA.
RP Badiru, AB (reprint author), USAF, Dept Syst & Engn Management, Inst Technol, Dayton, OH USA.
NR 3
TC 3
Z9 3
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-7235-8
J9 IND INNOV SER
PY 2009
BP 1
EP 42
D2 10.1201/9781420072365
PG 42
WC Business; Engineering, Manufacturing; Management; Operations Research &
Management Science
SC Business & Economics; Engineering; Operations Research & Management
Science
GA BJX44
UT WOS:000267354500001
ER
PT J
AU Rasmussen, CC
Canfield, RA
Blair, M
AF Rasmussen, C. C.
Canfield, R. A.
Blair, M.
TI Optimization process for configuration of flexible joined-wing
SO STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
LA English
DT Article; Proceedings Paper
CT AIAA/ISSMO 10th Multidisciplinary Analysis and Optimization Conference
CY AUG 30-SEP 01, 2004
CL Albany, NY
SP Amer Inst Aeronaut & Astronaut, ISSMO
DE Configuration design; Multidisciplinary optimization; Response surface
methodology
ID DESIGN; AIRCRAFT
AB An optimized configuration design utilizing both structural and aerodynamic analyses of a flexible joined-wing configuration is presented in this paper. The joined-wing aircraft concept fulfills a proposed long-endurance surveillance mission and incorporates a load-bearing antenna structure embedded in the wing skin. Aerodynamic, structural, and optimization analyses are completed a number of times. A range of joined-wing configurations were trimmed for critical flight conditions and then structurally optimized for trimmed flight and gust loads to achieve a minimum weight for each configuration. A response surface statistical analysis was then applied to determine optimal joined-wing aircraft configurations. The response surface showed trends in the design of lightweight joined-wing aircraft.
C1 [Rasmussen, C. C.; Canfield, R. A.] USAF, Inst Technol, AFIT ENY, Dept Aeronaut & Astronaut, Dayton, OH 45433 USA.
[Blair, M.] USAF, Res Lab, Air Vehicles Directorate, AFRL VA, Dayton, OH 45433 USA.
RP Rasmussen, CC (reprint author), USAF, Inst Technol, AFIT ENY, Dept Aeronaut & Astronaut, 2950 Hobson Way, Dayton, OH 45433 USA.
EM cody.rasmussen@afit.edu; robert.canfield@afit.edu
RI Canfield, Robert/C-1798-2012
OI Canfield, Robert/0000-0003-3679-2815
NR 19
TC 4
Z9 4
U1 0
U2 15
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1615-147X
J9 STRUCT MULTIDISCIP O
JI Struct. Multidiscip. Optim.
PD JAN
PY 2009
VL 37
IS 3
BP 265
EP 277
DI 10.1007/s00158-008-0229-4
PG 13
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary; Mechanics
SC Computer Science; Engineering; Mechanics
GA 373JH
UT WOS:000260967400005
ER
PT J
AU Kundu, T
Das, S
Jata, KV
AF Kundu, Tribikram
Das, Samik
Jata, Kumar V.
TI Health Monitoring of a Thermal Protection System using Lamb Waves
SO STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
LA English
DT Article
DE Thermal Protection System (TPS); delamination defect; impact; guided
wave; Lamb wave; acoustic emission; passive monitoring; ultrasonic
transducers
ID ACOUSTIC-EMISSION SOURCES; ANISOTROPIC PLATES; COMPOSITE; DEFECTS;
LOCATION; IMPACT; MODES; PROPAGATION; GENERATION; VIBRATION
AB The applicability of guided waves as a structural health monitoring (SHM) tool to predict the point of impact and detect delamination in a thermal protection system (TPS) is studied. A model TPS was designed by bonding ceramic porous tiles to a 2.2mm thick 2124-T351 aluminum alloy plate. The delamination defect may be caused by the impact phenomenon or due to other reasons such as manufacturing defect, thermal, or mechanical fatigue, etc. Impact phenomenon is simulated by dropping a ping pong ball on the tiled structure. The delamination at the interface between the ceramic tile and the aluminum plate is simulated by removing the adhesive bond at the selected interface regions during the specimen fabrication process. The conventional triangulation technique cannot predict the point of impact in a tiled plate structure because the triangulation technique assumes that the wave speed is independent of the direction of propagation which is not the case for ceramic tile mounted plates. An alternative method based on the optimization scheme was proposed by Kundu et al. [1] to locate the point of impact in plates by analyzing the time of arrival of the ultrasonic signals received by passive sensors attached to the plate. This objective function based method is used to locate the impact point on the tiled plate. Experiments are carried out by dropping a ping pong ball on the tiled structure and recording acoustic signals by passive transducers adhesively bonded to the plate at three different locations. The impact point is predicted and compared with the actual location of impact. Delamination detection studies were conducted in the pitch-catch mode, by changing the angle of strike and the frequency of the transducer excitation to generate the appropriate guided wave mode. The delamination defect could be detected and the impact point could be identified underlining the importance of the use of guided waves as an SHM tool for TPS.
C1 [Kundu, Tribikram; Das, Samik] Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA.
[Jata, Kumar V.] USAF, NDE Branch, Res Lab, Dayton, OH USA.
RP Kundu, T (reprint author), Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA.
EM tkundu@email.arizona.edu
FU Air Force Research Laboratory; AFRL/MLLP; Iowa State University
FX This research was partially supported from a research grant from the Air
Force Research Laboratory, AFRL/MLLP, through CNDE (Center for
Nondestructive Evaluation) of the Iowa State University. Experiments
were conducted at AFRL/MLLP while the first author was there as a summer
visiting scientist/professor.
NR 33
TC 14
Z9 14
U1 0
U2 5
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1475-9217
J9 STRUCT HEALTH MONIT
JI Struct. Health Monit.
PD JAN
PY 2009
VL 8
IS 1
BP 29
EP 45
DI 10.1177/1475921708090558
PG 17
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 398XB
UT WOS:000262763700003
ER
PT J
AU Vittori, J
Bremer, K
Vittori, P
AF Vittori, Jodi
Bremer, Kristin
Vittori, Pasquale
TI Islam in Tanzania and Kenya: Ally or Threat in the War on Terror?
SO STUDIES IN CONFLICT & TERRORISM
LA English
DT Article
AB This article explores the historical emergence of Islam in East Africa, details the political background of Tanzania and Kenya, the role of Islam in each country, and U.S. foreign policy in the region. The recent U.S. strategy of intelligence-sharing with Kenya, training and military support to both Kenya and Tanzania, and air strikes in Somalia are assessed. In addition to the current military emphasis, the United States should incorporate more osofto options, such as the promotion of democratic governance in these nascent democracies through political assistance in constitutional, judicial, and law-enforcement reform, as well as encouraging greater inclusion of Muslims in the political system.
C1 [Vittori, Jodi] USAF, Washington, DC 20330 USA.
[Bremer, Kristin] Kutztown State Univ, Dept Polit Sci, Kutztown, PA USA.
[Vittori, Pasquale] USA, Washington, DC 20310 USA.
RP Vittori, J (reprint author), USAF, Washington, DC 20330 USA.
EM jodimat@hotmail.com
NR 35
TC 1
Z9 1
U1 0
U2 2
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1057-610X
J9 STUD CONFL TERROR
JI Stud. Confl. Terror.
PY 2009
VL 32
IS 12
BP 1075
EP 1099
AR PII 917321509
DI 10.1080/10576100903319805
PG 25
WC International Relations; Political Science
SC International Relations; Government & Law
GA 528XP
UT WOS:000272480600004
ER
PT B
AU Brown, O
Kennedy, F
Pulliam, W
AF Brown, Owen
Kennedy, Fred
Pulliam, Wade
BE Sachdev, DK
TI DARPA's SPACE HISTORY
SO SUCCESS STORIES IN SATELLITE SYSTEMS
SE Library of Flight
LA English
DT Article; Book Chapter
C1 [Brown, Owen; Kennedy, Fred; Pulliam, Wade] Def Adv Res Projects Agcy, Tact Technol Off, Arlington, VA USA.
[Kennedy, Fred] USAF, Phillips Lab, Carlise, PA USA.
[Brown, Owen] Space Syst Loral, Palo Alto, CA USA.
RP Brown, O (reprint author), Def Adv Res Projects Agcy, Tact Technol Off, Arlington, VA USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS & ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DR, STE 500, RESTON, VA 20191-4344 USA
BN 978-1-56347-966-3
J9 LIBR FLIGHT
PY 2009
BP 353
EP +
PG 29
WC Engineering, Aerospace
SC Engineering
GA BKF81
UT WOS:000267990500016
ER
PT J
AU Learn, P
Kahlenberg, MS
AF Learn, PeterA.
Kahlenberg, Morton S.
TI Hereditary Colorectal Cancer Syndromes and the Role of the Surgical
Oncologist
SO SURGICAL ONCOLOGY CLINICS OF NORTH AMERICA
LA English
DT Review
DE Colorectal neoplasms; Genetics; Genetic testing
ID FAMILIAL ADENOMATOUS POLYPOSIS; PEUTZ-JEGHERS-SYNDROME; MISMATCH-REPAIR
GENES; REVISED BETHESDA GUIDELINES; NONPOLYPOSIS COLON-CANCER;
BASE-EXCISION-REPAIR; LYNCH-SYNDROME; JUVENILE POLYPOSIS; MICROSATELLITE
INSTABILITY; APC GENE
AB The expanding understanding of the genetic basis to hereditary colon cancer syndromes is dismantling previously conceived categorizations and shedding light on why those schemes often failed in past. This review highlights evolving concepts regarding the genetic diagnosis and clinical management of the more commonly inherited colorectal cancer syndromes, including a discussion of recently described familial syndromes. This review also addresses clinician responsibilities in recognition of familial syndromes and provision of counseling.
C1 [Kahlenberg, Morton S.] Baptist Canc Ctr, San Antonio, TX 78217 USA.
[Learn, PeterA.] Univ Texas Hlth Sci Ctr San Antonio, Dept Surg, San Antonio, TX 78229 USA.
[Learn, PeterA.] Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Kahlenberg, MS (reprint author), Baptist Canc Ctr, 8711 Village Dr,Suite 325, San Antonio, TX 78217 USA.
EM kahlenberg@surgoncsouthtexas.com
NR 142
TC 2
Z9 2
U1 0
U2 1
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1055-3207
J9 SURG ONCOL CLIN N AM
JI Surg. Oncol. Clin. N. Am.
PD JAN
PY 2009
VL 18
IS 1
BP 121
EP +
DI 10.1016/j.soc.2008.08.007
PG 25
WC Oncology; Surgery
SC Oncology; Surgery
GA 390NH
UT WOS:000262170500009
PM 19056045
ER
PT J
AU Kozlowski, SWJ
Watola, DJ
Jensen, JM
Kim, BH
Botero, IC
AF Kozlowski, Steve W. J.
Watola, Daniel J.
Jensen, Jaclyn M.
Kim, Brian H.
Botero, Isabel C.
BE Salas, E
Goodwin, GF
Burke, CS
TI Developing Adaptive Teams: A Theory of Dynamic Team Leadership
SO TEAM EFFECTIVENESS IN COMPLEX ORGANIZATIONS: CROSS-DISCIPLINARY
PERSPECTIVES AND APPROACHES
SE SIOP Organizational Frontiers Series
LA English
DT Article; Book Chapter
ID SELF-EFFICACY; ORGANIZATIONAL SOCIALIZATION; SHARED LEADERSHIP; MENTAL
MODELS; INFORMATION-SEEKING; COLLECTIVE-EFFICACY; TRANSACTIVE MEMORY;
GROUP COHESIVENESS; GOAL ORIENTATION; TASK STRATEGIES
C1 [Kozlowski, Steve W. J.] Michigan State Univ, E Lansing, MI 48824 USA.
[Kozlowski, Steve W. J.] Amer Psychol Assoc, Washington, DC USA.
[Kozlowski, Steve W. J.] Assoc Psychol Sci, Washington, DC USA.
[Kozlowski, Steve W. J.] Int Assoc Appl Psychol, Madrid, Spain.
[Kozlowski, Steve W. J.] Soc Ind & Org Psychol, Washington, DC USA.
[Watola, Daniel J.] USAF Acad, Colorado Springs, CO 80840 USA.
[Jensen, Jaclyn M.] George Washington Univ, Sch Business, Washington, DC 20052 USA.
[Kim, Brian H.] Occidental Coll, Los Angeles, CA USA.
[Botero, Isabel C.] Illinois State Univ, Sch Commun, Normal, IL 61761 USA.
RP Kozlowski, SWJ (reprint author), Michigan State Univ, E Lansing, MI 48824 USA.
RI KOZLOWSKI, STEVE/G-4614-2012
OI KOZLOWSKI, STEVE/0000-0002-5123-3424
NR 159
TC 45
Z9 46
U1 8
U2 19
PU PSYCHOLOGY PRESS
PI HOVE
PA 27 CHURCH ROAD, HOVE BN3 2FA, E SUSSEX, ENGLAND
BN 978-0-8058-5881-5
J9 SIOP ORGAN FRONT SER
PY 2009
BP 113
EP 155
PG 43
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA BUY94
UT WOS:000290753500007
ER
PT J
AU Gschwender, LJ
Snyder, CE
AF Gschwender, Lois J.
Snyder, Carl E., Jr.
TI US Air Force Perfluoropolyalkylether Experiences
SO TRIBOLOGY TRANSACTIONS
LA English
DT Article
DE Antiwear Additives; Aviation; Fluorocarbons; Viscosity-Pressure;
Viscosity-Temperature; Jet Engine Oils
AB The U.S. Air Force Research Laboratory (AFRL) received the first sample of perfluoropolyalkylether (PFPAE) liquid lubricant outside of private industry in the 1960s. The unique behavior of PFPAE fluids includes their excellent thermal stability (up to 345 degrees C with appropriate additives) and excellent viscosity-temperature properties for the linear structures. Military applications are often cutting-edge technology requiring these unique properties, but other undesirable behavior such as tribo-corrosion has required investigations into basic understanding of PFPAE fluids. From the 1960s on, Air Force scientists have investigated many aspects of their behavior as summarized here. This presentation discusses various types of PFPAEs commercially available and highlights studies on elastohydrodynamic lubrication film formation, model compounds, additives, relative humidity relationship to wear, and potential U. S. military program applications.
C1 [Gschwender, Lois J.; Snyder, Carl E., Jr.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Gschwender, LJ (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 13
TC 2
Z9 2
U1 1
U2 3
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1040-2004
J9 TRIBOL T
JI Tribol. Trans.
PY 2009
VL 52
IS 2
BP 165
EP 170
DI 10.1080/10402000802065360
PG 6
WC Engineering, Mechanical
SC Engineering
GA V15YN
UT WOS:000207837400004
ER
PT B
AU Shay, TM
Duarte, FJ
AF Shay, T. M.
Duarte, F. J.
BE Duarte, FJ
TI Tunable Fiber Lasers
SO TUNABLE LASER APPLICATIONS, SECOND EDITION
SE Optical Science and Engineering-CRC
LA English
DT Article; Book Chapter
ID HIGH-POWER; NARROW-LINEWIDTH; MODE OPERATION; BRAGG GRATINGS; RING
LASER; ER; OSCILLATORS; AMPLIFIER; FILTER
C1 [Shay, T. M.] USAF, Res Lab, Kirtland AFB, NM USA.
[Duarte, F. J.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Duarte, F. J.] Interferometr Opt, Rochester, NY USA.
RP Shay, TM (reprint author), USAF, Res Lab, Kirtland AFB, NM USA.
NR 37
TC 0
Z9 0
U1 0
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-6009-6
J9 OPT SCI ENG-CRC
PY 2009
VL 137
BP 179
EP 196
PG 18
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BJV13
UT WOS:000267233800006
ER
PT B
AU Rasmussen, S
Shima, T
Chandler, P
AF Rasmussen, Steven
Shima, Tal
Chandler, Phillip
BE Shima, T
Rasmussen, S
TI UAV Cooperative Decision and Control Challenges and Practical Approaches
Introduction
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Editorial Material; Book Chapter
C1 [Rasmussen, Steven] USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
[Shima, Tal] Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
RP Rasmussen, S (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
NR 12
TC 2
Z9 2
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 1
EP 14
D2 10.1137/1.9780898718584
PG 14
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500001
ER
PT B
AU Chandler, P
Pachter, M
AF Chandler, Phillip
Pachter, Meir
BE Shima, T
Rasmussen, S
TI Challenges
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
ID OPTIMIZATION; ALGORITHM; AGENTS
AB In this chapter the challenges of cooperative control are examined. While the dynamics of unmanned air vehicles are important, considerations relevant to resource allocation and optimization, the prevailing information pattern, and unstructured environment/uncertainty, dominate the analysis. The potential benefits of cooperative team actions and, in general, the benefits of cooperation among distributed controlled objects are addressed.
C1 [Chandler, Phillip] USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Pachter, Meir] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Chandler, P (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
NR 66
TC 1
Z9 1
U1 1
U2 1
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 15
EP 35
DI 10.1137/1.9780898718584.ch2
D2 10.1137/1.9780898718584
PG 21
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500002
ER
PT B
AU Schumacher, C
Shima, T
AF Schumacher, Corey
Shima, Tal
BE Shima, T
Rasmussen, S
TI Single-Task Tours
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Schumacher, Corey] USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Shima, Tal] Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
RP Schumacher, C (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 37
EP 51
DI 10.1137/1.9780898718584.ch3
D2 10.1137/1.9780898718584
PG 15
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500003
ER
PT B
AU Shima, T
Schumacher, C
Rasmussen, S
AF Shima, Tal
Schumacher, Corey
Rasmussen, Steven
BE Shima, T
Rasmussen, S
TI Multiple Assignmets
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Shima, Tal] Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
[Rasmussen, Steven] USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
RP Shima, T (reprint author), Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 53
EP 72
DI 10.1137/1.9780898718584.ch4
D2 10.1137/1.9780898718584
PG 20
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500004
ER
PT B
AU Schumacher, C
Shima, T
AF Schumacher, Corey
Shima, Tal
BE Shima, T
Rasmussen, S
TI Simultaneous Multiple Assignments
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Schumacher, Corey] USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Shima, Tal] Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
RP Schumacher, C (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 73
EP 88
DI 10.1137/1.9780898718584.ch5
D2 10.1137/1.9780898718584
PG 16
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500005
ER
PT B
AU Shima, T
Rasmussen, S
AF Shima, Tal
Rasmussen, Steven
BE Shima, T
Rasmussen, S
TI Estimation Algorithms for Improved Cooperation Under Uncertainty
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Shima, Tal] Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
[Rasmussen, Steven] USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
RP Shima, T (reprint author), Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 89
EP 101
DI 10.1137/1.9780898718584.ch6
D2 10.1137/1.9780898718584
PG 13
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500006
ER
PT B
AU Kish, B
Pachter, M
Jacques, D
AF Kish, Brian
Pachter, Meir
Jacques, David
BE Shima, T
Rasmussen, S
TI Effectiveness Measures for Operations in Uncertain Environments
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Kish, Brian; Jacques, David] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Pachter, Meir] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Kish, B (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 103
EP 124
DI 10.1137/1.9780898718584.ch7
D2 10.1137/1.9780898718584
PG 22
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500007
ER
PT B
AU Rasmussen, S
AF Rasmussen, Steven
BE Shima, T
Rasmussen, S
TI MultiUAV Simulation
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
RP Rasmussen, S (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
NR 4
TC 2
Z9 2
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 125
EP 139
DI 10.1137/1.9780898718584.appa
D2 10.1137/1.9780898718584
PG 15
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500008
ER
PT B
AU Ceccarelli, N
Rasmussen, S
AF Ceccarelli, Nicola
Rasmussen, Steven
BE Shima, T
Rasmussen, S
TI Path Planning for UAVs
SO UAV COOPERATIVE DECISION AND CONTROL: CHALLENGES AND PRACTICAL
APPROACHES
SE Advances in Design and Control
LA English
DT Article; Book Chapter
C1 [Ceccarelli, Nicola] USAF, Res Lab, Control Sci Ctr Excellence, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
[Rasmussen, Steven] USAF, Res Lab, Control Sci Ctr Excellence, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
RP Ceccarelli, N (reprint author), USAF, Res Lab, Control Sci Ctr Excellence, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-64-1
J9 ADV DES CONTROL
PY 2009
IS 18
BP 141
EP 158
DI 10.1137/1.9780898718584.appb
D2 10.1137/1.9780898718584
PG 18
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BJS30
UT WOS:000267067500009
ER
PT S
AU Kingston, D
AF Kingston, Derek
BE Gerhart, GR
Gage, DW
Shoemaker, CM
TI Road Surveillance Using a Team of Small UAVs
SO UNMANNED SYSTEMS TECHNOLOGY XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Unmanned Systems Technology XI
CY APR 17-17, 2009
CL Orlando, FL
SP SPIE
DE small UAVs; surveillance; cooperative control; automation
AB Monitoring roads is an important task for missions such as base security. This paper describes a road monitoring system composed of a team of small UAVs equipped with gimballed cameras. Given a fine description of the target road, algorithms for waypoint approximation, sensor steering, and UAV spacing are developed to allow N UAVs to survey stretches of road for activity. By automating the route generation and road tracking, human operators are freed to study the sensor returns from the vehicles to detect anomalous behavior. The spacing algorithm is robust to retasking and insertion/deletion of UAVs. Hardware results are presented that demonstrate the applicability of the solution.
C1 USAF, Res Lab, Dayton, OH USA.
RP Kingston, D (reprint author), USAF, Res Lab, Dayton, OH USA.
EM derek.kingston@wpafb.af.mil
NR 11
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7598-5
J9 PROC SPIE
PY 2009
VL 7332
AR 73320U
DI 10.1117/12.818774
PG 9
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Robotics; Optics
SC Computer Science; Robotics; Optics
GA BVS50
UT WOS:000292646300019
ER
PT J
AU Cespedes, RD
Serkin, FB
AF Cespedes, R. Duane
Serkin, Faye B.
TI Is Injection Therapy for Stress Urinary Incontinence Dead? No
SO UROLOGY
LA English
DT Editorial Material
ID COLLAGEN INJECTION; WOMEN; MULTICENTER; PATIENT
C1 [Cespedes, R. Duane; Serkin, Faye B.] Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA.
RP Cespedes, RD (reprint author), Wilford Hall USAF Med Ctr, Dept Urol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM dcespedes@satx.rr.com
NR 12
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0090-4295
J9 UROLOGY
JI Urology
PD JAN
PY 2009
VL 73
IS 1
BP 11
EP 13
DI 10.1016/j.urology.2008.05.048
PG 3
WC Urology & Nephrology
SC Urology & Nephrology
GA 393NJ
UT WOS:000262379700006
PM 18829080
ER
PT S
AU Luo, J
Andrian, JH
Zhou, C
Stephens, JP
AF Luo, Jun
Andrian, Jean H.
Zhou, Chi
Stephens, James P., Sr.
BE Powell, S
Shim, JP
TI Performance Analysis of Interference for OFDM Systems
SO WIRELESS TECHNOLOGY: APPLICATIONS, MANAGEMENT, AND SECURITY
SE Lecture Notes in Electrical Engineering
LA English
DT Article; Book Chapter
AB The bit error rate (BER) analysis of various interference types Is discussed for orthogonal frequency-division multiplexing (OFDM) systems in both analytical form and software simulation results. Specifically, the BER performance of barrage noise interference (BNI), partial band interference (PBI), and multitone interference (MTI) has been investigated in time-correlated Rayleigh fading channel with additive white Gaussian noise (AWGN). In addition, two novel intentional interference injecting methods - optimal-fraction PBI and optimal-fraction MTI - for OFDM systems are proposed with detailed theoretical analysis. Simulation results validate the analytical results. It is shown that under the various channel conditions, the optimal-fraction MTI always gives the best interference effect among all the interference models given in this chapter. Both analysis and simulation indicate that the proposed optimal-fraction MTI can be used to obtain improved interference effect under various channel conditions with low complexity for OFDM systems.
C1 [Luo, Jun; Andrian, Jean H.] Florida Int Univ, Dept Elect & Comp Engn, Miami, FL 33174 USA.
[Zhou, Chi] IIT, Dept Elect & Comp Engn, Chicago, IL 60616 USA.
[Stephens, James P., Sr.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Luo, J (reprint author), Florida Int Univ, Dept Elect & Comp Engn, Miami, FL 33174 USA.
EM Jean.Andrian@flu.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1876-1100
BN 978-0-387-71786-9
J9 LECT NOTES ELECTR EN
PY 2009
VL 44
BP 145
EP 160
DI 10.1007/978-0-387-71787-6_10
D2 10.1007/978-0-387-71787-6
PG 16
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Engineering, Electrical & Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BKW10
UT WOS:000269452700010
ER
PT B
AU Schneider, BR
AF Schneider, Barry R.
BE Kindt, MT
Post, JM
Schneider, BR
TI Al Qaeda's Modus Operandi: Anticipating Their Target Selection
SO WORLDS MOST THREATENING TERRORIST NETWORKS AND CRIMINAL GANGS
LA English
DT Article; Book Chapter
C1 [Schneider, Barry R.] USAF, CPC, Maxwell AFB, OH USA.
RP Schneider, BR (reprint author), USAF, CPC, Maxwell AFB, OH USA.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-230-62329-3
PY 2009
BP 29
EP 48
D2 10.1057/9780230623293
PG 20
WC International Relations; Political Science
SC International Relations; Government & Law
GA BSI91
UT WOS:000284582800002
ER
PT B
AU Burgess, SF
AF Burgess, Stephen F.
BE Kindt, MT
Post, JM
Schneider, BR
TI Political Islam and Radical Islam: The Cases of Pakistan and Bangladesh
SO WORLDS MOST THREATENING TERRORIST NETWORKS AND CRIMINAL GANGS
LA English
DT Article; Book Chapter
C1 [Burgess, Stephen F.] US Air War Coll, Dept Int Secur, Maxwell AFB, AL 36112 USA.
[Burgess, Stephen F.] USAF, Counterproliferat Ctr CPC, Wright Patterson AFB, OH 45433 USA.
RP Burgess, SF (reprint author), US Air War Coll, Dept Int Secur, Maxwell AFB, AL 36112 USA.
NR 36
TC 0
Z9 0
U1 0
U2 0
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-230-62329-3
PY 2009
BP 49
EP 69
D2 10.1057/9780230623293
PG 21
WC International Relations; Political Science
SC International Relations; Government & Law
GA BSI91
UT WOS:000284582800003
ER
PT J
AU Kindt, MT
AF Kindt, Michael T.
BE Kindt, MT
Post, JM
Schneider, BR
TI Hezbollah: A State within a State
SO WORLDS MOST THREATENING TERRORIST NETWORKS AND CRIMINAL GANGS
LA English
DT Article; Book Chapter
C1 [Kindt, Michael T.] USAF, Med Operat Agcy, Lackland AFB, TX USA.
[Kindt, Michael T.] USAF, CPC, Lackland AFB, TX USA.
RP Kindt, MT (reprint author), USAF, Med Operat Agcy, Lackland AFB, TX USA.
NR 30
TC 2
Z9 2
U1 0
U2 0
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-230-62329-3
PY 2009
BP 123
EP 144
D2 10.1057/9780230623293
PG 22
WC International Relations; Political Science
SC International Relations; Government & Law
GA BSI91
UT WOS:000284582800006
ER
PT S
AU Hewett, KB
AF Hewett, Kevin B.
BE Vilar, R
Conde, O
Fajardo, M
Silva, LO
Pires, M
Utkin, A
TI Singlet oxygen generators - the heart of chemical oxygen iodine lasers:
past, present and future
SO XVII INTERNATIONAL SYMPOSIUM ON GAS FLOW, CHEMICAL LASERS, AND
HIGH-POWER LASERS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 17th International Symposium on Gas Flow, Chemical Lasers, and
High-Power Lasers
CY SEP 15-19, 2008
CL Lisbon, PORTUGAL
SP INOV, SPIRICON Laser Beam Diagnost, Multiwave Photon, Amplitude Syst
DE Chemical Oxygen Iodine Laser; Singlet Oxygen Generator
ID SUPERSONIC COIL; HIGH-EFFICIENCY; JET GENERATOR; BUFFER GAS;
OPTIMIZATION; PERFORMANCE; FLOW
AB Since the initial demonstration of chemical oxygen iodine lasers in 1977, researchers have realized that the heart of the COIL system is the singlet oxygen generator. This drives the performance of the system in terms of output power, mass efficiency, engineering complexity, reliability and maintainability. For this reason the singlet oxygen generator has been the focus of intense research and development efforts over the last 30 years. This paper reports on the history of singlet oxygen generators - starting with the simple sparger design used in the initial COIL demonstration and ending with current jet or droplet generators used in laboratories around the world. The relative performance of the different generator types will naturally lead to performance goals for the research efforts of the future.
C1 USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Hewett, KB (reprint author), USAF, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM afrl.rdlc.sci.org@kirtland.af.mil
NR 58
TC 2
Z9 2
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7365-3
J9 PROC SPIE
PY 2009
VL 7131
AR 71310I
DI 10.1117/12.816612
PG 8
WC Chemistry, Physical; Optics; Physics, Applied
SC Chemistry; Optics; Physics
GA BSS82
UT WOS:000285717000018
ER
PT S
AU Zeringue, C
Dajani, I
Bronder, TJ
Shay, T
Robin, C
AF Zeringue, Clint
Dajani, Iyad
Bronder, T. Justin
Shay, Thomas
Robin, Craig
BE Vilar, R
Conde, O
Fajardo, M
Silva, LO
Pires, M
Utkin, A
TI SBS mitigation with multi-tone amplification- a theoretical model
SO XVII INTERNATIONAL SYMPOSIUM ON GAS FLOW, CHEMICAL LASERS, AND
HIGH-POWER LASERS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 17th International Symposium on Gas Flow, Chemical Lasers, and
High-Power Lasers
CY SEP 15-19, 2008
CL Lisbon, PORTUGAL
SP INOV, SPIRICON Laser Beam Diagnost, Multiwave Photon, Amplitude Syst
DE fiber amplifier; stimulated Brillouin scattering; four-wave mixing
AB Two approaches to two- and three-tone seeding of high power ytterbium-doped fiber amplifiers are investigated using a symbolic and numerical code that solves a two point boundary problem consisting of a 12x12 system of nonlinear differential equations. Optimization of amplifier action is considered in relation to the two most dominant nonlinear effects: stimulated Brillouin scattering and four-wave mixing. One approach uses a large wavelength separation among the input seed beams, while in the other approach the seeds are separated by precisely twice the Brillouin shift. It is found that for both techniques significant increase in amplifier output can be obtained, although for the latter case a substantial amount of power is generated in the four-wave mixing sidebands.
C1 [Zeringue, Clint; Dajani, Iyad; Bronder, T. Justin; Shay, Thomas; Robin, Craig] USAF, High Power Solid State Lasers Branch, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Zeringue, C (reprint author), USAF, High Power Solid State Lasers Branch, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
EM AFRL.RDLO.BR.CH.DEP.SEC.DL@Kirtland.af.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7365-3
J9 PROC SPIE
PY 2009
VL 7131
AR 71310Y
DI 10.1117/12.815358
PG 9
WC Chemistry, Physical; Optics; Physics, Applied
SC Chemistry; Optics; Physics
GA BSS82
UT WOS:000285717000033
ER
PT J
AU Crooker, NU
Kahler, SW
Gosling, JT
Lepping, RP
AF Crooker, N. U.
Kahler, S. W.
Gosling, J. T.
Lepping, R. P.
TI Evidence in magnetic clouds for systematic open flux transport on the
Sun
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID CORONAL MASS EJECTIONS; SOLAR-WIND; ELECTRONS; TOPOLOGY; DEPLETIONS;
EVENTS
AB Most magnetic clouds encountered by spacecraft at 1 AU display a mix of unidirectional suprathermal electrons signaling open field lines and counterstreaming electrons signaling loops connected to the Sun at both ends. Assuming the open fields were originally loops that underwent interchange reconnection with open fields at the Sun, we determine the sense of connectedness of the open fields found in 72 of 97 magnetic clouds identified by the Wind spacecraft in order to obtain information on the location and sense of the reconnection and resulting flux transport at the Sun. The true polarity of the open fields in each magnetic cloud was determined from the direction of the suprathermal electron flow relative to the magnetic field direction. Results indicate that the polarity of all open fields within a given magnetic cloud is the same 89% of the time, implying that interchange reconnection at the Sun most often occurs in only one leg of a flux rope loop, thus transporting open flux in a single direction, from a coronal hole near that leg to the foot point of the opposite leg. This pattern is consistent with the view that interchange reconnection in coronal mass ejections systematically transports an amount of open flux sufficient to reverse the polarity of the heliospheric field through the course of the solar cycle. Using the same electron data, we also find that the fields encountered in magnetic clouds are only a third as likely to be locally inverted as not. While one might expect inversions to be equally as common as not in flux rope coils, consideration of the geometry of spacecraft trajectories relative to the modeled magnetic cloud axes leads us to conclude that the result is reasonable.
C1 [Crooker, N. U.] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
[Gosling, J. T.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80303 USA.
[Kahler, S. W.] USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
[Lepping, R. P.] NASA, Goddard Space Flight Ctr, Space Weather Lab, Greenbelt, MD 20771 USA.
RP Crooker, NU (reprint author), Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
EM crooker@bu.edu
FU NASA [NNG06GC18G]
FX This paper is based upon work supported by NASA under grant NNG06GC18G.
NR 20
TC 10
Z9 10
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 24
PY 2008
VL 113
IS A12
AR A12107
DI 10.1029/2008JA013628
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 388UH
UT WOS:000262044200001
ER
PT J
AU Hollkamp, JJ
Gordon, RW
AF Hollkamp, Joseph J.
Gordon, Robert W.
TI Reduced-order models for nonlinear response prediction: Implicit
condensation and expansion
SO JOURNAL OF SOUND AND VIBRATION
LA English
DT Article
AB Accurate prediction of the response of aircraft skins to acoustic loading is important in the design of future air vehicles. Direct time integration of full-order, nonlinear, finite element models may be accurate, but is computationally expensive. Much work has been reported in recent years on prediction methods, which reduce a finite element model to a reduced-order system of nonlinear modal equations. The major difference among the methods is the means by which induced membrane displacements are modeled. One method is the implicit condensation method where the effects of membrane displacements are condensed into the nonlinear stiffness terms of the bending equations. Membrane displacements are not explicitly modeled, so membrane basis vectors are not needed. However, the lack of membrane displacements, prohibits the recovery of membrane stresses and strains from the standard finite element strain-displacement relationships. Here, the implicit condensation method is improved by adding a step to recover membrane displacements using an estimated membrane basis. Examples are given that demonstrate the viability of the proposed method. Published by Elsevier Ltd.
C1 [Hollkamp, Joseph J.; Gordon, Robert W.] USAF, Res Lab, AFRL RBSM, Wright Patterson AFB, OH 45433 USA.
RP Hollkamp, JJ (reprint author), USAF, Res Lab, AFRL RBSM, 2790 D St, Wright Patterson AFB, OH 45433 USA.
EM Joseph.Hollkamp@wpafb.af.mil; Robert.Gordon@wpafb.af.mil
NR 10
TC 22
Z9 22
U1 0
U2 2
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-460X
J9 J SOUND VIB
JI J. Sound Vibr.
PD DEC 23
PY 2008
VL 318
IS 4-5
BP 1139
EP 1153
DI 10.1016/j.jsv.2008.04.035
PG 15
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 358UR
UT WOS:000259943500031
ER
PT J
AU Tandon, GP
Pochiraju, KV
Schoeppner, GA
AF Tandon, G. P.
Pochiraju, K. V.
Schoeppner, G. A.
TI Thermo-oxidative behavior of high-temperature PMR-15 resin and
composites
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Recent Advances in Composite Materials
CY FEB 20-23, 2007
CL New Delhi, INDIA
SP India Habitat Ctr
DE Thermo-oxidation; Anisotropic; Diffusion; Reaction; Aging; Damage
ID ORGANIC MATRIX COMPOSITES; THERMAL-OXIDATION; WEIGHT-LOSS; DEGRADATION;
STABILITY; PRESSURE; EPOXY
AB The present study examines the thermo-oxidative behavior of high-temperature polymer matrix composite materials. Thermo-oxidative aging in neat resin is simulated with a diffusion-reaction model in which temperature, oxygen concentration and weight loss effects are considered. The thermo-oxidative behavior of the composite, on the other hand, is significantly different from that of the constituents as the composite microstructure, including the fiber/matrix interphase/interface, introduces anisotropy in the diffusion and oxidation behavior. Unit cell analyses are carried out using three-dimensional finite element analysis of repeated volume elements representing the fiber, matrix and interphase regions, and the resin oxidation model. Parametric studies illustrating the anisotropy in the oxidative region growth and the effect of fiber and interphase diffusivity on the oxidation layer growth are discussed. It is suggested that fiber-matrix debonding could provide additional diffusion paths to explain the extent of observed anisotropic oxidation growth. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Tandon, G. P.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Pochiraju, K. V.] Stevens Inst Technol, Dept Mech Engn, Hoboken, NJ 07030 USA.
[Schoeppner, G. A.] USAF, Res Lab, AFRL RXBC, Wright Patterson AFB, OH 45433 USA.
RP Tandon, GP (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
EM G.Tandon@wpafb.af.mil
OI Pochiraju, Kishore/0000-0002-0248-8658
NR 27
TC 27
Z9 29
U1 1
U2 16
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD DEC 20
PY 2008
VL 498
IS 1-2
SI SI
BP 150
EP 161
DI 10.1016/j.msea.2007.09.103
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 379UA
UT WOS:000261420500023
ER
PT J
AU Bezrodny, VG
Charkina, OV
Galushko, VG
Groves, K
Kashcheyev, AS
Watkins, BJ
Yampolski, YM
Murayama, Y
AF Bezrodny, V. G.
Charkina, O. V.
Galushko, V. G.
Groves, K.
Kashcheyev, A. S.
Watkins, B. J.
Yampolski, Y. M.
Murayama, Y.
TI Application of an imaging HF riometer for the observation of
scintillations of discrete cosmic sources
SO RADIO SCIENCE
LA English
DT Article
ID FIELD-ALIGNED IRREGULARITIES; RADIO-SOURCES
AB Scintillations of discrete cosmic radio sources have been investigated theoretically and experimentally for radiation scattered from natural and artificial inhomogeneities in the auroral zone ionosphere. The observations were performed at a frequency of 38.2 MHz with the multibeam phased array antenna of the imaging riometer located at Poker Flat, Alaska. For quiet ionospheric conditions and weak scintillations, the spatial spectrum and transverse motion velocities of the Fresnel inhomogeneities have been recovered. A theoretically based approach has been developed to estimate the time coherence interval of the radiation for the case of saturated scintillations and strong ionospheric turbulence. Examples of scintillation records are analyzed for the case of scattering from artificial ionospheric irregularities induced by high-power HF radiation from the high-power auroral simulation (HIPAS) ionospheric modification facility. The effect of aspect-sensitive scattering of the cosmic source radiation by artificial field-aligned small-scale irregularities has been predicted and detected. Prospects for routine observations of the effects of scintillations and aspect-sensitive scattering are discussed for special operation modes of the ionospheric modification facility.
C1 [Bezrodny, V. G.; Charkina, O. V.; Galushko, V. G.; Kashcheyev, A. S.; Yampolski, Y. M.] Natl Acad Sci Ukraine, Inst Radio Astron, UA-61002 Kharkov, Ukraine.
[Groves, K.] USAF, Res Lab, Hanscom AFB, MA 01731 USA.
[Murayama, Y.] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan.
[Watkins, B. J.] Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA.
RP Bezrodny, VG (reprint author), Natl Acad Sci Ukraine, Inst Radio Astron, 4 Chervonopraporna St, UA-61002 Kharkov, Ukraine.
EM ualaska-watkins@usa.net
FU INTAS [03-51-5583]; Presidium of the National Academy of Sciences of
Ukraine
FX The writers consider it as a pleasant duty to thank Jim Desrochers
(Fairbanks, Alaska) and Y. Tanaka (ROIS, Japan) for providing some of
the observational data. The work of the Ukrainian team was partially
supported through the INTAS grant 03-51-5583 and Research Project
"Cyclone'' (Project Agreement 1.17.22) financed by the Presidium of the
National Academy of Sciences of Ukraine.
NR 20
TC 3
Z9 3
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
J9 RADIO SCI
JI Radio Sci.
PD DEC 19
PY 2008
VL 43
IS 6
AR RS6007
DI 10.1029/2007RS003721
PG 14
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 386MW
UT WOS:000261888300001
ER
PT J
AU Kar, T
Bettinger, HF
Scheiner, S
Roy, AK
AF Kar, Tapas
Bettinger, Holger F.
Scheiner, Steve
Roy, Ajit K.
TI Noncovalent pi-pi Stacking and CH center dot center dot center dot pi
Interactions of Aromatics on the Surface of Single-Wall Carbon
Nanotubes: An MP2 Study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SIDEWALL-FUNCTIONALIZATION; CHARGE-TRANSFER; CHEMISTRY; DISPERSION;
MOLECULES; BENZENE; DENSITY; SYSTEMS; ONIOM; SIZE
AB The magnitude and nature of interactions between small aromatic systems (benzene and naphthalene) and various single-wall carbon nanotubes are examined by MP2 theory. pi-pi stacking configurations are more strongly bound than CH center dot center dot center dot pi analogues. There is a small preference for placement of the aromatic directly above a C=C bond center in the nanotube. All of these complexes are dominated by dispersion forces. Mobility of adsorbed benzene on the tube surface is considered in terms of rotating, tilting, and sliding. As noted previously for covalent modification of nanotubes, the computationally efficient same level different basis set protocol is reliable for studying noncovalent interactions. Previously reported DFT (LDA or GGA) binding energies for pi-pi stacking arrangements are underestimated, whereas dispersion-corrected methods overestimate these binding energies.
C1 [Kar, Tapas; Scheiner, Steve] Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA.
[Bettinger, Holger F.] Ruhr Univ Bochum, D-44780 Bochum, Germany.
[Roy, Ajit K.] USAF, Res Lab, AFRL MLBCM, Wright Patterson AFB, OH 45433 USA.
RP Kar, T (reprint author), Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA.
EM tapas.kar@usu.edu
FU Alexander von Humboldt-Stiftung; Deutsche Forschungsgemeinschaft
FX This work was supported by the Alexander von Humboldt-Stiftung and the
Deutsche Forschungsgemeinschaft. We thank the MSRC personnel for their
support in using the ASC/HP computational resources.
NR 37
TC 42
Z9 42
U1 1
U2 20
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 DEC 18
PY 2008
VL 112
IS 50
BP 20070
EP 20075
DI 10.1021/jp807809u
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 383CZ
UT WOS:000261653000040
ER
PT J
AU Kudryavtsev, AA
Popugaev, SD
Demidov, VI
Adams, SF
Jiao, CQ
AF Kudryavtsev, A. A.
Popugaev, S. D.
Demidov, V. I.
Adams, S. F.
Jiao, C. Q.
TI Formative time of breakdown modeled for the ignition of air and n-butane
mixtures using effective ionization coefficients
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE arcs (electric); ignition; plasma simulation
AB It is shown that simulations of ignition by electric arc discharge in n-butane and air mixtures have interesting features, which deviate from results obtained by simple extension of calculations based on methanelike fuels. In particular, it is demonstrated that lowering the temperature of the n-butane-air mixture before ignition under certain conditions will actually decrease the ignition stage time as well as the required electric field.
C1 [Kudryavtsev, A. A.; Popugaev, S. D.] St Petersburg State Univ, St Petersburg 198904, Russia.
[Demidov, V. I.] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
[Adams, S. F.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Jiao, C. Q.] ISSI Inc, Dayton, OH 45440 USA.
RP Kudryavtsev, AA (reprint author), St Petersburg State Univ, St Petersburg 198904, Russia.
EM steven.adams@wpafb.af.mil
RI Demidov, Vladimir/A-4247-2013;
OI Demidov, Vladimir/0000-0002-2672-7684; Kudryavtsev,
Anatoly/0000-0002-2232-2954
FU Air Force Office of Scientific Research; V. I. D. was supported through
the DEPSCoR program
FX This work was supported by the Air Force Office of Scientific Research.
The work of V. I. D. was supported through the DEPSCoR program.
NR 9
TC 0
Z9 0
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD DEC 15
PY 2008
VL 93
IS 24
AR 241501
DI 10.1063/1.3052882
PG 3
WC Physics, Applied
SC Physics
GA 386PZ
UT WOS:000261896400016
ER
PT J
AU Pandey, RB
Farmer, BL
AF Pandey, R. B.
Farmer, B. L.
TI Exfoliation of a Stack of Platelets and Intercalation of Polymer Chains:
Effects of Molecular Weight, Entanglement, and Interaction with the
Polymer Matrix
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE bond fluctuating chains; bond-fluctuating sheet; clay platelet;
coarse-grained model; exfoliation; Monte Carlo simulation
ID MONTE-CARLO-SIMULATION; MODIFIED LAYERED SILICATES; MELT INTERCALATION;
CLAY NANOCOMPOSITES; COMPUTER-SIMULATION; DYNAMICS; TEMPERATURE;
DISPERSION; SOLVENT; MODEL
AB Exfoliation of a stack of sheets (a model for clay platelets) in a dynamic matrix of polymer chains is investigated by a computer simulation model. How the interplay between the thermodynamics (interaction-driven) and conformational (structural constraints) entropy affects the exfoliation of sheets is the subject of this study. A stack of four sheets with a small initial interlayer distance constitutes the layer on a discrete lattice. The layered platelets are immersed in a matrix represented by the mobile polymer chains which occupy a fraction (concentration) of the lattice sites. Both sheets and chains are modeled by the bond-fluctuation mechanism and execute their stochastic motion via Metropolis algorithm. An attractive and a repulsive interaction between the polymer matrix and platelets are considered. Exfoliation of the sheets is examined by varying the molecular weight of the polymer chains forming a dynamic network matrix with various degrees of entanglements. At low-molecular weight of the polymer, exfoliation is achieved with repulsive interaction and the exfoliation is suppressed with attractive matrix as sheets stick together via polymer mediated interaction introduced by intercalated polymer chains. Increasing the molecular weight of the polymer matrix suppresses the exfoliation of sheets primarily due to enhanced entanglement-at high-molecular weight (with the radius of gyration of polymer chains larger than the characteristic linear dimension of the platelets), the stacked (layered) morphology is arrested via entropic trapping and exfoliation ceases to occur. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 2696-2710, 2008
C1 [Pandey, R. B.] Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
[Farmer, B. L.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Pandey, RB (reprint author), Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA.
EM ras.pandey@usm.edu
FU Materials and Manufacturing Directorate; Air Force Research Laboratory,
the Air Force Office of Scientific Research (AFOSR)
FX Support from the Materials and Manufacturing Directorate of the Air
Force Research Laboratory, the Air Force Office of Scientific Research
(AFOSR) is gratefully acknowledged.
NR 32
TC 10
Z9 10
U1 1
U2 10
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD DEC 15
PY 2008
VL 46
IS 24
BP 2696
EP 2710
DI 10.1002/polb.21595
PG 15
WC Polymer Science
SC Polymer Science
GA 383WQ
UT WOS:000261705400007
ER
PT J
AU Quast, JP
Boehlert, CJ
Gardner, R
Tuegel, E
Wyen, T
AF Quast, J. P.
Boehlert, C. J.
Gardner, R.
Tuegel, E.
Wyen, T.
TI A microstructure and sonic fatigue investigation of Ti-TiB functionally
graded materials
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Microstructure; Titanium; Boron; Fatigue; Functionally graded material
ID MATRIX COMPOSITES; MECHANICAL-PROPERTIES; TITANIUM MATRIX; MATERIAL
SYSTEM; EVOLUTION; ALLOY
AB The microstructure and high-cycle sonic fatigue behavior of 3- and 25-mm-thick titanium-titanium boride (Ti-TiB) functionally graded plates were evaluated. The TiB content had a significant effect on the microstructure. A needle-like TiB phase existed at low TiB phase volume percentages (< 33.8%), while higher volume percentages resulted in TiB-phase clustering. For larger layer thicknesses, the transition or interface region between the layers was more evident. Fracture surface images of the fatigue specimens indicated that high TiB content regions exhibited brittle fracture characteristics while the Ti-rich layers exhibited ductile failure characteristics. A Ti-85%TiB alloy was also investigated and this material exhibited TiB clustering and sporadic fatigue lives as well as brittle fracture characteristics. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Quast, J. P.; Boehlert, C. J.] Michigan State Univ, E Lansing, MI 48824 USA.
[Gardner, R.] Miami Univ, Miamisburg, OH USA.
[Tuegel, E.; Wyen, T.] Air Vehicles Directorate, AF Res Lab, Dayton, OH USA.
RP Quast, JP (reprint author), Michigan State Univ, E Lansing, MI 48824 USA.
EM jquast@msu.edu
FU United States Air Force Research Laboratory (AFRL/VA)
FX This work was partially supported the Chief Scientist Innovative
Research Fund of the Air Vehicles Directorate, United States Air Force
Research Laboratory (AFRL/VA). The authors are grateful to Dr. Larry
Byrd of AFRL for his technical guidance and assistance. This manuscript
was cleared for public release on February 4, 2008 under document number
WPAFB 08-0249.
NR 24
TC 8
Z9 9
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD DEC 15
PY 2008
VL 497
IS 1-2
BP 1
EP 9
DI 10.1016/j.msea.2008.07.045
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 388QC
UT WOS:000262033300001
ER
PT J
AU Ruggles-Wrenn, MB
Braun, JC
AF Ruggles-Wrenn, M. B.
Braun, J. C.
TI Effects of steam environment on creep behavior of Nextel (TM)
720/alumina ceramic composite at elevated temperature
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Ceramic-matrix composites (CMCs); Oxides; Creep; High-temperature
properties; Fractography
ID OXIDE FIBER COMPOSITES; MATRIX COMPOSITES; MECHANICAL-PROPERTIES;
CRACK-GROWTH; MULLITE/ALUMINA MIXTURES; TENSILE-STRENGTH;
STRESS-CORROSION; STATIC FATIGUE; FRACTURE; GLASS
AB The tensile creep behavior of an oxide-oxide continuous fiber ceramic composite (CFCC) was investigated at 1000 and 1100 degrees C in laboratory air and in steam. The composite consists of a porous alumina matrix reinforced with laminated, woven mullite/alumina (Nextel (TM) 720) fibers, has no interface between the fiber and matrix, and relies on the porous matrix for flaw tolerance. The tensile stress-strain behavior was investigated and the tensile properties measured. The influence of the loading rate on tensile stress-strain response and on tensile properties at 1100 and 1200 degrees C in steam was also explored. A change in loading rate by four orders or magnitude had a profound effect on tensile strength. Tensile creep behavior was examined for creep stresses in the 80-150 MPa range. Primary and secondary creep regimes were observed in creep tests at all temperatures investigated. Creep rates increased with increasing temperature and creep stress. The presence of steam accelerated creep rates and dramatically reduced creep life. The detrimental effects of steam become progressively more pronounced with increasing temperature. At 1000 degrees C, creep run-out defined as 100 h at creep stress was achieved in all tests. At 1100 degrees C, creep run-out was achieved in all tests in air and only in the 100 MPa test in steam. The residual strength and modulus of all specimens that achieved run-out were Characterized. Composite microstructure, as well as damage and failure mechanisms were investigated. Published by Elsevier B.V.
C1 [Ruggles-Wrenn, M. B.; Braun, J. C.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Ruggles-Wrenn, MB (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM marina.ruggles-wrenn@afit.edu
RI Ruggles-Wrenn, Marina/J-6103-2014
FU Air Force Research Laboratory
FX The financial support of Dr. R. Sikorski and Dr. J. Zelina, Propulsion
Directorate, Air Force Research Laboratory is highly appreciated.
NR 45
TC 19
Z9 19
U1 2
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD DEC 15
PY 2008
VL 497
IS 1-2
BP 101
EP 110
DI 10.1016/j.msea.2008.06.036
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 388QC
UT WOS:000262033300015
ER
PT J
AU Hsu, PS
Roy, S
Gord, JR
AF Hsu, Paul S.
Roy, Sukesh
Gord, James R.
TI Development of a nearly transform-limited, low-repetition-rate,
picosecond optical parametric generator
SO OPTICS COMMUNICATIONS
LA English
DT Article
ID LASER; SPECTROSCOPY; PULSES; AMPLIFIER; DIODE
AB A low-repetition-rate (10-Hz), picosecond (ps) optical parametric generator (OPG) seeded at the idler wavelength with a high-power diode laser is demonstrated. The output of the OPG at similar to 566 nm is amplified in dye cells, resulting in signal enhancement by more than three orders of magnitude. The nearly transform-limited beam at similar to 566 nm has a pulsewidth of similar to 170 ps, with an overall output of similar to 2.3 mJ/ pulse. The laser is tuned either by tuning the nonlinear crystal or the seed-laser current. The applications of such a simple, compact, high-performance, tunable ps laser system for linear and nonlinear spectroscopies are outlined. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hsu, Paul S.; Roy, Sukesh; Gord, James R.] USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
RP Roy, S (reprint author), USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
EM sroy@woh.rr.com
FU Sandia National Laboratories; Air Force Office of Scientific Research
[FA9550-07-C-0036]; Air Force Research Laboratory; Propulsion
Directorate; Wright-Patterson Air Force Base [F33615-03-D-2329]
FX The authors gratefully acknowledge fruitful discussions with Dr. A.K.
Patnaik of Wright State University and ISSI and Dr. T.B. Settersten of
Sandia National Laboratories. Funding, for this research was provided by
the Air Force Office of Scientific Research under Contract No.
FA9550-07-C-0036 (Dr. Julian Tishkoff, Program Manager) and by the Air
Force Research Laboratory, Propulsion Directorate, Wright-Patterson Air
Force Base under Contract No. F33615-03-D-2329.
NR 21
TC 3
Z9 3
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0030-4018
J9 OPT COMMUN
JI Opt. Commun.
PD DEC 15
PY 2008
VL 281
IS 24
BP 6068
EP 6071
DI 10.1016/j.optcom.2008.09.039
PG 4
WC Optics
SC Optics
GA 381PH
UT WOS:000261547900022
ER
PT J
AU Ahamed, M
Karns, M
Goodson, M
Rowe, J
Hussain, SM
Schlager, JJ
Hong, YL
AF Ahamed, Maqusood
Karns, Michael
Goodson, Michael
Rowe, John
Hussain, Saber M.
Schlager, John J.
Hong, Yiling
TI DNA damage response to different surface chemistry of silver
nanoparticles in mammalian cells
SO TOXICOLOGY AND APPLIED PHARMACOLOGY
LA English
DT Article
DE Silver nanoparticles; Genotoxicity; DNA damage; Apoptosis; Mammalian
cells
ID EMBRYONIC STEM-CELLS; IN-VITRO; MOUSE; APOPTOSIS; TOXICITY; PATHWAYS;
REPAIR
AB Silver nanoparticles (Ag NPs) have recently received much attention for their possible applications in biotechnology and life sciences. Ag NPs are of interest to defense and engineering programs for new material applications as well as for commercial purposes as an antimicrobial. However, little is known about the genotoxicity of Ag NPs following exposure to mammalian cells. This study was undertaken to examine the DNA damage response to polysaccharide surface functionalized (coated) and non-functionalized (uncoated) Au NPs in two types of mammalian cells; mouse embryonic stein (mES) cells and mouse embryonic fibroblasts (MEF). Both types of Ag NPs up-regulated the cell cycle checkpoint protein p53 and DNA damage repair proteins Rad51 and phosphorylated-H2AX expression. Furthermore both of them induced cell death as measured by the annexin V protein expression and MTT assay. Our observations also suggested that the different surface chemistry of Ag NPs induce different DNA damage response: coated Ag NPs exhibited more severe damage than uncoated Ag NPs. The results suggest that polysaccharide coated particles are more individually distributed while agglomeration of the uncoated particles limits the surface area availability and access to membrane bound organelles. Published by Elsevier Inc.
C1 [Ahamed, Maqusood; Karns, Michael; Goodson, Michael; Rowe, John; Hong, Yiling] Univ Dayton, Dept Biol, Ctr Tissue Regenerat & Engn, Dayton, OH 45469 USA.
[Schlager, John J.] USAF, Res Lab, Appl Biotechnol Branch, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hong, YL (reprint author), Univ Dayton, Dept Biol, Ctr Tissue Regenerat & Engn, Dayton, OH 45469 USA.
EM Yiling.Hong@notes.udayton.edu
FU U.S. Air Force Research Laboratory; Human Effectiveness Directorate,
Biosciences and Protection Division; Applied Biotechnology
(USAFRL/HEPB); Oak Ridge Institute for Science and Education, Oak Ridge,
TN; University of Dayton, OH, USA; National Science Foundation
[CBET-0833953]
FX M.A. and M.G. were funded by the U.S. Air Force Research Laboratory,
Human Effectiveness Directorate, Biosciences and Protection Division,
Applied Biotechnology (USAFRL/HEPB) administered by the Oak Ridge
Institute for Science and Education, Oak Ridge, TN and University of
Dayton, OH, USA. The project was also funded by National Science
Foundation grant CBET-0833953 to J.R. The research described here was
performed in University of Dayton/AFRL shared laboratory located at the
university as a result of a CRADA agreement.
NR 34
TC 296
Z9 314
U1 15
U2 89
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0041-008X
J9 TOXICOL APPL PHARM
JI Toxicol. Appl. Pharmacol.
PD DEC 15
PY 2008
VL 233
IS 3
BP 404
EP 410
DI 10.1016/j.taap.2008.09.015
PG 7
WC Pharmacology & Pharmacy; Toxicology
SC Pharmacology & Pharmacy; Toxicology
GA 383ZZ
UT WOS:000261714400006
PM 18930072
ER
PT J
AU Owens, MJ
Arge, CN
Crooker, NU
Schwadron, NA
Horbury, TS
AF Owens, M. J.
Arge, C. N.
Crooker, N. U.
Schwadron, N. A.
Horbury, T. S.
TI Estimating total heliospheric magnetic flux from single-point in situ
measurements
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID CORONAL MASS EJECTIONS; SOLAR CORONA; FIELD EXPERIMENT; INTERPLANETARY;
ULYSSES; CYCLE; WIND; MAGNETOMETER; SUN
AB A fraction of the total photospheric magnetic flux opens to the heliosphere to form the interplanetary magnetic field carried by the solar wind. While this open flux is critical to our understanding of the generation and evolution of the solar magnetic field, direct measurements are generally limited to single-point measurements taken in situ by heliospheric spacecraft. An observed latitude invariance in the radial component of the magnetic field suggests that extrapolation from such single-point measurements to total heliospheric magnetic flux is possible. In this study we test this assumption using estimates of total heliospheric flux from well-separated heliospheric spacecraft and conclude that single-point measurements are indeed adequate proxies for the total heliospheric magnetic flux, though care must be taken when comparing flux estimates from data collected at different heliocentric distances.
C1 [Owens, M. J.; Crooker, N. U.; Schwadron, N. A.] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
[Arge, C. N.] USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Owens, M. J.; Horbury, T. S.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
RP Owens, MJ (reprint author), Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England.
EM m.owens@imperial.ac.uk
RI Owens, Mathew/B-3006-2010
OI Owens, Mathew/0000-0003-2061-2453
FU National Science Foundation [ATM-012950]; CISM; STFC (UK); NASA
[NNG06GC18G]
FX Amitava Bhattacharjee thanks Susan T. Lepri and Leif Svalgaard for their
assistance in evaluating this paper.
NR 36
TC 36
Z9 36
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 11
PY 2008
VL 113
IS A12
AR A12103
DI 10.1029/2008JA013677
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 383QO
UT WOS:000261688600008
ER
PT J
AU Lamonte, K
Gualdron, DAG
Cabrales-Navarro, FA
Scanlon, LG
Sandi, G
Feld, W
Balbuena, PB
AF Lamonte, Kevin
Gualdron, Diego A. Gomez
Cabrales-Navarro, Fredy A.
Scanlon, Lawrence G.
Sandi, Giselle
Feld, William
Balbuena, Perla B.
TI Molecular Dynamics Simulations of H-2 Adsorption in Tetramethyl Ammonium
Lithium Phthalocyanine Crystalline Structures
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID DENSITY; CORANNULENE; HYDROGEN; FUNCTIONALS; BINDING
AB Tetramethyl ammonium lithium phthalocyanine is explored as a potential material for storage of molecular hydrogen. Density functional theory calculations are used to investigate the molecular structure and the dimer conformation. Additional scans performed to determine the interactions of a H-2 molecule located at various distances from the molecular sites are used to generate a simple force field including dipole-induced-dipole interactions. This force field is employed in molecular dynamics simulations to calculate adsorption isotherms at various pressures. The regions of strongest adsorption are quantified as functions of temperature, pressure, and separation between molecules in the adsorbent phase, and compared to the regions of strongest binding energy as given by the proposed force field. It is found that the total adsorption could not be predicted only from the spatial distribution of the strongest binding energies; the available volume is the other contributing factor even if the volume includes regions of much lower binding energy. The results suggest that the complex anion is primarily involved in the adsorption process with molecular hydrogen, whereas the cation serves to provide access for hydrogen adsorption in both sides of the anion molecular plane, and spacing between the planes.
C1 [Lamonte, Kevin; Gualdron, Diego A. Gomez; Cabrales-Navarro, Fredy A.; Balbuena, Perla B.] Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA.
[Scanlon, Lawrence G.] USAF, Res Lab, Energy Storage & Thermal Sci Branch, Wright Patterson AFB, OH 45433 USA.
[Sandi, Giselle] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
[Feld, William] Wright State Univ, Dept Chem, Dayton, OH 45435 USA.
RP Balbuena, PB (reprint author), Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA.
EM balbuena@tamu.edu
FU Air Force Research Laboratory
FX This work is supported by funds from the Air Force Research Laboratory.
Supercomputer time provided by the TAMU supercomputer center and by the
DoD Major Shared Resource Centers (ARL MSRC and ASC MSRC) is gratefully
acknowledged.
NR 24
TC 3
Z9 3
U1 1
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD DEC 11
PY 2008
VL 112
IS 49
BP 15775
EP 15782
DI 10.1021/jp8050998
PG 8
WC Chemistry, Physical
SC Chemistry
GA 379WI
UT WOS:000261426500030
PM 19367822
ER
PT J
AU Stenbaek-Nielsen, HC
McHarg, MG
AF Stenbaek-Nielsen, H. C.
McHarg, M. G.
TI High time-resolution sprite imaging: observations and implications
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID RED SPRITES; STREAMER PROPAGATION; ELECTRIC-FIELD; EMISSIONS; NITROGEN;
IDENTIFICATION; THUNDERCLOUD; IONOSPHERE; ATMOSPHERE; PHOTOMETRY
AB Sprites are large scale manifestations of electrical streamers triggered in the upper atmosphere by lightning in an underlying thunderstorm. Imaging of sprites at 10 000 frames per second has provided new insights into their spatial and temporal development. In this paper we discuss the experimental protocols that have been developed for performing high-speed observations of sprites and some new observations that have been obtained of relevance to laboratory experiments. Downward tendrils and upward branches, so characteristic in video recordings, are shown to be formed by very fast streamer heads with velocities up to half the speed of light. The streamer heads are spatially small, similar to 100 m or less, but very bright with emission rates up to similar to 10(24) photons s(-1). The sprite onset begins with a downward streamer. Then, in some sprites, at a little later time and from a lower altitude upward moving streamer heads may also appear. If there are no upward streamers the sprite would be classified as a 'C-sprite'; with both downward and upward streamers it would be a 'carrot sprite'. The optical emissions are primarily from the neutral molecular nitrogen first positive bands emitting in the near-infrared, but there are also blue emissions assumed to be from second positive bands of molecular nitrogen and from first negative bands of nitrogen ions. The streamer heads are observed at times to split into several streamer heads. This process appears to be more frequent in the core of larger sprites.
C1 [Stenbaek-Nielsen, H. C.] Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA.
[McHarg, M. G.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Stenbaek-Nielsen, HC (reprint author), Univ Alaska, Inst Geophys, 903 Koyukuk Dr, Fairbanks, AK 99775 USA.
EM hnielsen@gi.alaska.edu; matthew.mcharg@usafa.edu
FU NSF; US Air Force Academy
FX The authors acknowledge insightful discussions with many colleagues in
the field notably, D Sentman, J Morrill, V Pasko, N Liu and S Cummer.
Colourization of the 1000 fps sprite images was done by D Sentman. We
also thank U Ebert and D Sentman for organizing the conference and to
the Lorentz Institute for their support. The research was in part
supported by NSF grants to the University of Alaska Fairbanks and the US
Air Force Academy.
NR 56
TC 67
Z9 67
U1 0
U2 7
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 DEC 7
PY 2008
VL 41
IS 23
AR 234009
DI 10.1088/0022-3727/41/23/234009
PG 14
WC Physics, Applied
SC Physics
GA 374OB
UT WOS:000261052500015
ER
PT J
AU Campbell, AL
Biggers, RR
Subramanyam, G
Kozlowski, G
Kleismit, RA
Zate, HN
Hopkins, SC
Glowacki, BA
Riehl, BD
Peterson, TL
AF Campbell, Angela L.
Biggers, Rand R.
Subramanyam, Guru
Kozlowski, Gregory
Kleismit, Richard A.
Zate, Hollie N.
Hopkins, Simon C.
Glowacki, Bartek A.
Riehl, Bonnie D.
Peterson, Timothy L.
TI Microwave characterization of nanostructured ferroelectric
Ba0.6Sr0.4TiO3 thin films fabricated by pulsed laser deposition
SO NANOTECHNOLOGY
LA English
DT Article
ID SCANNING OPTICAL MICROSCOPY; STRONTIUM-TITANATE FILMS;
DIELECTRIC-PROPERTIES; PHASE-TRANSITIONS; STRAIN; PRESSURE;
PERMITTIVITY; SHIFTERS; (001)MGO; DIAGRAMS
AB A series of nanostructured ferroelectric thin films of barium strontium titanate were fabricated using a pulsed laser deposition system with real-time in situ process control. Pulsed laser deposition parameters were controlled during the growth of nanostructured thin films for use in the development of high frequency tunable microwave devices. The thin films were all grown at the same substrate temperature and laser beam energy density, but the chamber oxygen partial pressure (COPP) was varied systematically from 19 mTorr through 1000 Torr. Structural and electromagnetic characterization was performed using atomic force microscopy and evanescent microwave microscopy, respectively. Atomic force microscopy showed a linear increase in grain size with increases in the ambient oxygen pressure from 38 to 150 mTorr and from 300 mTorr to 1000 Torr. The correlation of the microwave properties with the epitaxial film microstructure can be attributed to stresses and polarizability in the film. Microwave characterization showed that a COPP of 75 mTorr yielded the most desirable film in terms of tunability and loss tangent over a wide frequency range.
C1 [Campbell, Angela L.; Biggers, Rand R.; Zate, Hollie N.; Peterson, Timothy L.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Subramanyam, Guru; Riehl, Bonnie D.] Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
[Kozlowski, Gregory; Kleismit, Richard A.] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
[Kozlowski, Gregory; Hopkins, Simon C.; Glowacki, Bartek A.] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England.
RP Campbell, AL (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RI Hopkins, Simon/A-6826-2008; Glowacki, Bartek/F-5113-2010
OI Hopkins, Simon/0000-0002-0245-8627;
NR 46
TC 7
Z9 7
U1 0
U2 9
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 DEC 3
PY 2008
VL 19
IS 48
AR 485704
DI 10.1088/0957-4484/19/48/485704
PG 14
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 371VH
UT WOS:000260859400021
PM 21836311
ER
PT J
AU Na, JK
Blackshire, JL
Kuhr, S
AF Na, Jeong K.
Blackshire, James L.
Kuhr, Samuel
TI Design, fabrication, and characterization of single-element interdigital
transducers for NDT applications
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article
DE Interdigital transducer; Laser interferometer; Rayleigh waves; Narrow
bandwidth; Gaussian beam profile
ID WAVES
AB Single-element interdigital transducers (IDTs) are designed, fabricated, and characterized as a complimentary sensor approach for traditional ultrasonic transducers used in nondestructive testing (NDT). The frequency of interest is in the lower megahertz range, 2-10 MHz. In this paper, a simple five-finger paired IDT is described, where laser micro-machining techniques were used to shape the electrode patterns for an IDT resonance frequency of similar to 3 MHz. Detailed characterization of the Rayleigh surface waves generated by the IDT is performed using a scanning laser interferometry system. Wave properties such as beam profile, beam divergence, energy decay, frequency response, and phase dependence are reported. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Na, Jeong K.; Kuhr, Samuel] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Blackshire, James L.] USAF, Res Lab, RXLP, Wright Patterson AFB, OH 45433 USA.
RP Na, JK (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM jeong-kwan.na@wpafb.af.mil
FU U.S. Air Force Research Laboratory; Nondestructive Evaluation Branch
(AFRL/RXLP); United States Air Force [F33615-03-C5220]
FX This work was supported by the U.S. Air Force Research Laboratory,
Nondestructive Evaluation Branch (AFRL/RXLP), through the United States
Air Force Contract F33615-03-C5220.
NR 11
TC 24
Z9 24
U1 1
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD DEC 3
PY 2008
VL 148
IS 2
BP 359
EP 365
DI 10.1016/j.sna.2008.08.018
PG 7
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 385LZ
UT WOS:000261817000002
ER
PT J
AU Bebarta, VS
AF Bebarta, Vikhyat S.
TI A Hero
SO ACADEMIC EMERGENCY MEDICINE
LA English
DT Article
C1 Univ Texas Hlth Sci Ctr San Antonio, Dept Emergency Med, Wilford Hall USAF Med Ctr, San Antonio, TX 78229 USA.
RP Bebarta, VS (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Emergency Med, Wilford Hall USAF Med Ctr, San Antonio, TX 78229 USA.
EM vikbebarta@yahoo.com
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1069-6563
J9 ACAD EMERG MED
JI Acad. Emerg. Med.
PD DEC
PY 2008
VL 15
IS 12
BP 1327
EP 1327
DI 10.1111/j.1553-2712.2008.00078.x
PG 1
WC Emergency Medicine
SC Emergency Medicine
GA 379KI
UT WOS:000261394700024
ER
PT J
AU Ragel, BT
McCafferty, RR
AF Ragel, Brian T.
McCafferty, Randall R.
TI Indirect gunshot wound to the head
SO ACTA NEUROCHIRURGICA
LA English
DT Article
DE Neurosurgery; Military; Gunshot wound
AB An Afghani man presented to a U.S. military facility in Afghanistan with a 3-month history of clear fluid from his left naris and frequent sinusitis. Eleven years earlier, he had been struck in the forehead by an object falling from the sky.
Neurologic examination revealed decreased sensation in V1 and V2 on the left side. Imaging revealed a large bullet lodged in the left maxillary sinus.
The bullet was removed via sublabial incision and opening of the anterior bony wall of the maxillary sinus.
In Afghanistan, indirect gunshot wounds to the head are not uncommon because of the constant war conditions since the invasion by the former Soviet Union in 1979 and the tradition of firing rounds into the air during cultural celebrations.
C1 [Ragel, Brian T.] Travis AFB, David Grant Med Ctr, Dept Neurosurg, Fairfield, CA 94535 USA.
[McCafferty, Randall R.] Lackland AFB, Wilford Hall Med Ctr, Dept Neurosurg, San Antonio, TX USA.
RP Ragel, BT (reprint author), Travis AFB, David Grant Med Ctr, Dept Neurosurg, 101 Bodin Circle,Travis AFB, Fairfield, CA 94535 USA.
EM brian.ragel@gmail.com
NR 1
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0001-6268
J9 ACTA NEUROCHIR
JI Acta Neurochir.
PD DEC
PY 2008
VL 150
IS 12
BP 1311
EP 1312
DI 10.1007/s00701-008-0148-6
PG 2
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 382FF
UT WOS:000261590000016
PM 19015810
ER
PT J
AU Orlov, DM
Font, GI
Edelstein, D
AF Orlov, Dmitri M.
Font, Gabriel I.
Edelstein, Daniel
TI Characterization of Discharge Modes of Plasma Actuators
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 46th Aerospace Sciences Meeting and Exhibit
CY JAN 07-10, 2008
CL Reno, NV
SP Amer Inst Aeronaut & Astronaut
ID INDUCTIVELY-COUPLED PLASMA; 2-DIMENSIONAL FLUID MODEL; FLOW-CONTROL;
MECHANISMS; RESPONSES
AB Atmospheric-pressure dielectric barrier discharges for aerodynamic flow control are investigated. The properties of the plasma discharge during positive and negative half-cycles of the driving voltage are studied experimentally and numerically. The simulations are performed in nitrogen. It is shown that during the positive half-cycle the plasma operates in the streamer mode, whereas the negative half-cycle is characterized by a glow-type discharge. The computational results are compared with experimental optical measurements and found to be in good agreement.
C1 [Orlov, Dmitri M.; Font, Gabriel I.; Edelstein, Daniel] US AF Acad, Dept Phys, Colorado Springs, CO 80918 USA.
RP Orlov, DM (reprint author), US AF Acad, Dept Phys, Colorado Springs, CO 80918 USA.
RI Orlov, Dmitriy/D-2406-2016
OI Orlov, Dmitriy/0000-0002-2230-457X
NR 39
TC 33
Z9 33
U1 1
U2 7
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD DEC
PY 2008
VL 46
IS 12
BP 3142
EP 3148
DI 10.2514/1.37514
PG 7
WC Engineering, Aerospace
SC Engineering
GA 381IA
UT WOS:000261528000014
ER
PT J
AU Wittwer-Backofen, U
Buckberry, J
Czarnetzki, A
Doppler, S
Grupe, G
Hotz, G
Kemkes, A
Larsen, CS
Prince, D
Wahl, J
Fabig, A
Weise, S
AF Wittwer-Backofen, Ursula
Buckberry, Jo
Czarnetzki, Alfred
Doppler, Stefanie
Grupe, Gisela
Hotz, Gerhard
Kemkes, Ariane
Larsen, Clark Spencer
Prince, Debbie
Wahl, Joachim
Fabig, Alexander
Weise, Svenja
TI Basics in Paleodemography: A Comparison of Age Indicators Applied to the
Early Medieval Skeletal Sample of Lauchheim
SO AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
LA English
DT Article
DE paleodemography; age estimation; biomarker of the skeleton; osteology;
dental anthropology
ID CEMENTUM ANNULATION; REVISED METHOD; INCREMENTAL LINES; AURICULAR
SURFACE; HOMO-SAPIENS; PHASE METHOD; STERNAL RIB; DEATH; ACCURACY;
SUTURES
AB Recent advances in the methods of skeletal age estimation have rekindled interest in their applicability to paleodemography. The current study contributes to the discussion by applying several long established as well as recently developed or refined aging methods to a subsample of 121 adult skeletons from the early medieval cemetery of Lauchheim. The skeletal remains were analyzed by 13 independent observers using a variety of aging techniques (complex method and other multimethod approaches, Transition Analysis, cranial suture closure, auricular surface method, osteon density method, tooth root translucency measurement, and tooth cementum annulation counting). The age ranges and mean age estimations were compared and results indicate that all methods showed smaller age ranges for the younger individuals, but broader age ranges for the older age groups. Am J Phys Anthropol 137:384-396, 2008. (C) 2008 Wiley-Liss, Inc.
C1 [Wittwer-Backofen, Ursula] Univ Freiburg, Inst Human Genet & Anthropol, Dept Human Genet & Anthropol, D-79104 Freiburg, Germany.
[Buckberry, Jo] Univ Bradford, Div Archaeol Geog & Environm Sci, Biol Anthropol Res Ctr, Bradford BD7 1DP, W Yorkshire, England.
[Doppler, Stefanie; Grupe, Gisela] Univ Munich, Dept Biol 1, Bioctr, Munich, Germany.
[Grupe, Gisela] Bavarian State Collect Anthropol & Palaeoanat, Munich, Germany.
[Hotz, Gerhard] Nat Hist Museum, Basel, Switzerland.
[Kemkes, Ariane] Tholius Inst, Scottsdale, AZ USA.
[Larsen, Clark Spencer] Ohio State Univ, Dept Anthropol, Columbus, OH 43210 USA.
[Prince, Debbie] JPAC Cent Identificat Lab, Hickam Afb, HI USA.
[Wahl, Joachim] Off Konstanz, State Off Preservat Ancient Monuments, Reg Board Stuttgart, Constance, Germany.
[Fabig, Alexander; Weise, Svenja] Max Planck Inst Demog Res, Rostock, Germany.
RP Wittwer-Backofen, U (reprint author), Univ Freiburg, Inst Human Genet & Anthropol, Dept Human Genet & Anthropol, Albertstr 9, D-79104 Freiburg, Germany.
EM ursula.wittwer-backofen@uniklinik-freiburg.de
FU Max Planck Institute for Demographic Research in Rostock, Germany
FX Grant sponsor: Max Planck Institute for Demographic Research in Rostock,
Germany.
NR 53
TC 30
Z9 31
U1 0
U2 11
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0002-9483
J9 AM J PHYS ANTHROPOL
JI Am. J. Phys. Anthropol.
PD DEC
PY 2008
VL 137
IS 4
BP 384
EP 396
DI 10.1002/ajpa.20881
PG 13
WC Anthropology; Evolutionary Biology
SC Anthropology; Evolutionary Biology
GA 375OS
UT WOS:000261123800002
PM 18615503
ER
PT J
AU Schnabel, D
Bulimo, W
Garner, J
Achilla, R
Headley, V
Martin, S
AF Schnabel, David
Bulimo, Wallace
Garner, Jason
Achilla, Rachel
Headley, Virginia
Martin, Sam
TI A REPORT OF THE FIRST TWO AND A HALF YEARS OF A COMPREHENSIVE INFLUENZA
SENTINEL SURVEILLANCE SYSTEM IN KENYA AND ITS IMPLICATIONS FOR VACCINE
STRAIN SELECTION IN THE EAST AFRICA REGION
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Meeting Abstract
CT 57th Annual Meeting of the
American-Society-of-Tropical-Medicine-and-Hygiene
CY DEC 07-11, 2008
CL New Orleans, LA
SP Amer Soc Trop Med & Hyg
C1 [Schnabel, David; Martin, Sam] USA, Med Res Unit, Nairobi, Kenya.
[Bulimo, Wallace; Achilla, Rachel] Kenya Govt Med Res Ctr, Nairobi, Kenya.
[Garner, Jason; Headley, Virginia] USAF, Sch Aerosp Med, Brooks City Base, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD DEC
PY 2008
VL 79
IS 6
MA 799
BP 236
EP 236
PG 1
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 382ZT
UT WOS:000261644601164
ER
PT J
AU La Shell, MS
Tankersley, MS
AF La Shell, Mark S.
Tankersley, Michael S.
TI Antibiotics for the allergist: part 1
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Review
ID ACUTE OTITIS-MEDIA; RESISTANT STREPTOCOCCUS-PNEUMONIAE; ACUTE MAXILLARY
SINUSITIS; PLACEBO-CONTROLLED TRIAL; HIGH-DOSE AMOXICILLIN; CHRONIC
RHINOSINUSITIS; DOUBLE-BLIND; STAPHYLOCOCCUS-AUREUS; CHILDREN;
MANAGEMENT
AB Objective: To review antibiotic use and selection for disorders commonly seen in allergy practice.
Data Sources: MEDLINE searches were performed cross-referencing the keywords antibiotic, antimicrobial, management, and treatment with multiple disorders commonly seen in allergy practice. References of the chosen articles were also examined.
Study Selection: Articles were selected based on their relevance to the subject matter.
Results: A large body of research is available that is relevant to both conventional and novel uses of antibiotics. The use of antibiotics is in question for some disorders, whereas novel approaches to therapy with macrolide antibiotics are areas of active investigation. Meanwhile, patterns of microbial resistance continue to evolve.
Conclusion: For decades, antibiotics have been traditional first-line treatments for many disorders. Recently, this paradigm appears to be shifting as periods of observation come into favor and nonbacterial causes of inflammation are under greater scrutiny. Nonetheless, appropriate antibiotic selection often remains a key element in the treatment of these disorders. Knowledge of the relevant microbiology is an inherent requirement in selecting antibiotic therapies and necessitates awareness of current trends in bacterial resistance.
C1 [La Shell, Mark S.] Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, Lackland AFB, TX 78236 USA.
RP La Shell, MS (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM mark.lashell@lackland.af.mil
NR 65
TC 1
Z9 1
U1 0
U2 0
PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY
PI ARLINGTON HTS
PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA
SN 1081-1206
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD DEC
PY 2008
VL 101
IS 6
BP 559
EP 567
PG 9
WC Allergy; Immunology
SC Allergy; Immunology
GA 383CJ
UT WOS:000261651400001
PM 19119699
ER
PT J
AU Galbreath, AD
Smith, B
Wood, PR
Inscore, S
Forkner, E
Vazquez, M
Fallot, A
Ellis, R
Peters, JI
AF Galbreath, Autumn Dawn
Smith, Brad
Wood, Pamela R.
Inscore, Stephen
Forkner, Emma
Vazquez, Marilu
Fallot, Andre
Ellis, Robert
Peters, Jay I.
TI Assessing the value of disease management: impact of 2 disease
management strategies in an underserved asthma population
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Article; Proceedings Paper
CT 103rd International Conference of the American-Thoracic-Society
CY MAY 18-23, 2007
CL San Francisco, CA
SP Amer Thorac Soc
ID QUALITY-OF-LIFE; SYMPTOM SCALE; CHILDREN; PROGRAM; OUTCOMES; MEDICAID;
INVESTMENT; TRIAL
AB Background: The goal of disease management (DM) is to improve health outcomes and reduce cost through decreasing health care utilization. Although some studies have shown that DM improves asthma outcomes, these interventions have not been examined in a large randomized controlled trial.
Objective: To compare the effectiveness of 2 previously successful DM programs with that of traditional care.
Methods: Nine hundred two individuals with asthma (429 adults: 473 children) were randomly assigned to telephonic DM, augmented DM (ADM; DM plus in-home visits by a respiratory therapist), or traditional care. Data were collected at enrollment and at 6 and 12 months. Primary outcomes were time to first asthma-related event, quality of life (QOL), and rates of asthma-related health care utilization. Secondary outcomes included rate of controller medication initiation, number of oral corticosteroid bursts, asthma symptom scores, and number of school days missed.
Results: There were no significant differences between groups in time to first asthma-related event or health care utilization. Adult participants in the ADM group had greater improvement in QOL (P =.04) and a decrease in asthma symptorns (P =.001) compared with other groups. Of children not receiving controller medications at enrollment (13%), those in the intervention groups were more likely to have controller medications initiated than the control group (P =.01). Otherwise, there were no differences in outcomes.
Conclusions: Overall, participation in asthma DM did not result in significant differences in utilization or clinical outcomes. The only significant impact was a higher rate of controller medication initiation in children and improvement in asthma symptoms and QOL in adults who received ADM.
C1 [Wood, Pamela R.; Inscore, Stephen] Univ Texas Hlth Sci Ctr San Antonio, Dept Pediat, San Antonio, TX 78229 USA.
[Galbreath, Autumn Dawn; Vazquez, Marilu; Peters, Jay I.] Univ Texas Hlth Sci Ctr San Antonio, Dept Med, San Antonio, TX 78229 USA.
[Smith, Brad; Forkner, Emma] Altarum Inst, San Antonio, TX USA.
[Fallot, Andre; Ellis, Robert] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
RP Wood, PR (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Pediat, MS7808,7703 Floyd Curl Dr, San Antonio, TX 78229 USA.
EM woodp@uthscsa.edu
FU NCEH CDC HHS [EH000095]
NR 35
TC 11
Z9 12
U1 1
U2 4
PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY
PI ARLINGTON HTS
PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA
SN 1081-1206
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD DEC
PY 2008
VL 101
IS 6
BP 599
EP 607
PG 9
WC Allergy; Immunology
SC Allergy; Immunology
GA 383CJ
UT WOS:000261651400005
PM 19119703
ER
PT J
AU Fadare, O
Liang, SX
AF Fadare, Oluwole
Liang, Sharon X.
TI Epithelioid smooth muscle tumors of the uterus do not express CD 1a: a
potential immunohistochemical adjunct in their distinction from uterine
perivascular epithelioid cell tumors
SO ANNALS OF DIAGNOSTIC PATHOLOGY
LA English
DT Article
DE CD1a; HMB-45; Epithelioid leiomyoma; Epithelioid leiomyosarcoma;
Perivascular epithelioid cell tumors; PEComa
ID OF-THE-LITERATURE; MESENCHYMAL NEOPLASMS; TUBEROUS SCLEROSIS; PECOMA;
LEIOMYOSARCOMA; PATIENT; SUGAR; LYMPHANGIOLEIOMYOMATOSIS;
ANGIOMYOLIPOMA; PREDILECTION
AB Uterine epithelioid smooth muscle tumors and uterine perivascular epithelioid cell tumors (PEComas) are known to display such a substantial overlap in morphologic and immunophenotypic characteristics that the existence of the latter as a distinct clinicopathologic entity at this location has been called into question. Recent research Suggests that the constituent entities of the PEComa family at all anatomical locations, including lymphangioleiomyomatosis of the uterus, uniformly display immunoreactivity for CD1a. The purpose of this study is to determine the proportion of uterine epithelioid smooth muscle tumors that may similarly be CD1a-positive. Representative sections from 18 archived epithelioid smooth muscle tumors of the uterine corpus (6 epithelioid leiomyosarcomas and 12 epithelioid leiomyomas), diagnosed and classified as such based on World Health Organization criteria, were subjected to immunohistochemical stains for CD I a and HMB-45. The epithelioid component of the tissue sections evaluated ranged from 10% to 100% (mean, 70%). Two cases were composed predominantly of cells with overtly clear cytoplasm. All cases were entirely negative for CD1a. Of 18 cases, 1 (5.5%) (an epithelioid leiomyosarcoma) displayed immunoreactivity for HMB-45 in scattered lesional cells that constituted approximately 5% of the overall tumoral volume for the case. All others were HMB-45-negative. Given their rarity, future studies are required to confirm that all PEComas of the uterus are indeed uniformly positive for CD1a. However, if the latter staining pattern is confirmed, our findings herein Suggest that CD1a may be a useful immunohistochemical adjunct in distinguishing uterine epithelioid smooth muscle tumors from uterine PECornas. Published by Elsevier Inc.
C1 [Fadare, Oluwole] Wilford Hall USAF Med Ctr, Dept Pathol, San Antonio, TX 78236 USA.
[Fadare, Oluwole] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
[Liang, Sharon X.] Stony Brook Univ Hosp, Dept Pathol, Stony Brook, NY 11794 USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com
NR 59
TC 11
Z9 14
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1092-9134
EI 1532-8198
J9 ANN DIAGN PATHOL
JI Ann. Diagn. Pathol.
PD DEC
PY 2008
VL 12
IS 6
BP 401
EP 405
DI 10.1016/j.anndiagpath.2008.04.009
PG 5
WC Pathology
SC Pathology
GA 376OT
UT WOS:000261193600003
PM 18995203
ER
PT J
AU Biffinger, JC
Pietron, J
Bretschger, O
Nadeau, LJ
Johnson, GR
Williams, CC
Nealson, KH
Ringeisen, BR
AF Biffinger, Justin C.
Pietron, Jeremy
Bretschger, Orianna
Nadeau, Lloyd J.
Johnson, Glenn R.
Williams, Cynthia C.
Nealson, Kenneth H.
Ringeisen, Bradley R.
TI The influence of acidity on microbial fuel cells containing Shewanella
oneidensis
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE Microbial fuel cells (MFCs); Acidity; Shewanella oneidensis; Mediated
electron transfer
ID EXTRACELLULAR ELECTRON-TRANSFER; GLOBAL TRANSCRIPTOME ANALYSIS;
WASTE-WATER TREATMENT; OXYGEN REDUCTION; IRON REDUCTION; MR-1; PH;
MEMBRANE; CHAMBER; PUTREFACIENS
AB Microbial fuel cells (MFCs) traditionally operate at pH values between 6 and 8. However, the effect of pH on the growth and electron transfer abilities of Shewanella oneidensis MR-1 (wild-type) and DSP10 (spontaneous mutant), bacteria commonly used in MFCs, to electrodes has not been examined. Miniature MFCs using bare graphite felt electrodes and nanoporous polycarbonate membranes with MR-1 or DSP10 cultures generated >8 W/m(3) and similar to 400 mu A between pH 6-7. The DSP10 strain significantly outperformed MR-1 at neutral pH but underperformed at pH 5. Higher concentrations of DSP10 were sustained at pH 7 relative to that of MR-1, whereas at pH 5 this trend was reversed indicating that cell count was not solely responsible for the observed differences in current. S. oneidensis MR-1 was determined to be more suitable than DSP10 for MFCs with elevated acidity levels. The concentration of riboflavin in the bacterial cultures was reduced significantly at pH 5 for DSP10, as determined by high performance liquid chromatography (HPLC) of the filter sterilized growth media. In addition, these results suggest that mediator biosynthesis and not solely bacterial concentration plays a significant role in current output from S. oneidensis containing MFCs. Published by Elsevier B.V.
C1 [Biffinger, Justin C.; Pietron, Jeremy; Williams, Cynthia C.; Ringeisen, Bradley R.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
[Bretschger, Orianna; Nealson, Kenneth H.] Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA.
[Nadeau, Lloyd J.; Johnson, Glenn R.] USAF, Res Lab, Tyndall AFB, FL 32403 USA.
[Bretschger, Orianna] Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA.
RP Ringeisen, BR (reprint author), USN, Res Lab, Div Chem, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Bradley.ringeisen@nrl.navy.mil
FU Office of Naval Research [62123N]; Air Force Office of Scientific
Research [FA9550-06-1-0292]; US Air Force Research Laboratory; Materials
Science Directorate (AFRL-RX); National Research Council
FX This work was funded by the Office of Naval Research (NRL 6.2 Program
Element Number 62123N), the Air Force Office of Scientific Research
(MURI program, Award No. FA9550-06-1-0292) and the AFRL research was
funded by the US Air Force Research Laboratory, Materials Science
Directorate (AFRL-RX). JCB thanks the National Research Council for his
postdoctoral research associateship.
NR 38
TC 53
Z9 55
U1 4
U2 29
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
OXFORD OX5 1GB, OXON, ENGLAND
SN 0956-5663
J9 BIOSENS BIOELECTRON
JI Biosens. Bioelectron.
PD DEC 1
PY 2008
VL 24
IS 4
BP 900
EP 905
DI 10.1016/j.bios.2008.07.034
PG 6
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 377PB
UT WOS:000261262000062
PM 18774288
ER
PT J
AU Ruggles-Wrenn, MB
Szymczak, NR
AF Ruggles-Wrenn, M. B.
Szymczak, N. R.
TI Effects of steam environment on compressive creep behavior of Nextel
(TM) 720/Alumina ceramic composite at 1200 degrees C
SO COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
LA English
DT Article
DE Ceramic-matrix composites (CMCs); Creep; Environmental degradation;
Mechanical testing
ID TEMPERATURE MECHANICAL-BEHAVIOR; FIBER-REINFORCED COMPOSITES; MONOTONIC
TENSILE BEHAVIOR; MATRIX COMPOSITES; LOADING RATE;
ELEVATED-TEMPERATURES; DAMAGE-TOLERANT; CRACK GROWTH; FAILURE; STRENGTH
AB The compressive creep behavior of all oxide-oxide ceramic-matrix composite (CMC) was investigated at 1200 degrees C in laboratory air and in steam. The composite consists of a Porous alumina matrix reinforced with laminated, woven mullite/alumina (Nextel (TM) 720) fibers, has no interface between the fiber and matrix, and relies oil the porous-matrix for flaw tolerance. The compressive stress-strain behavior was investigated and the compressive properties measured. The influence of the loading rate oil compressive stress-strain response and on compressive properties was also explored. A change in loading rate by four orders or magnitude had a profound effect on compressive properties in air and especially in steam. Compressive creep behavior was examined for creep stresses ill the -40 to -100 MPa range. Minimum creep rate was reached in all tests. In air, compressive creep strain magnitudes remained <0.4% and compressive creep strain rates approached -3.5 x 10(-7) s(-1). Creep run-out defined as 100 It at creep stress was achieved in all tests conducted in air. The presence of steam accelerated creep rates and significantly reduced creep lifetimes. In steam, compressive creep strains approached 1.6%, and compressive creep strain rates, -1.9 x 10(-2) s(-1) . In steam, maximum time to rupture was only 3.9 h. Composite microstructure, as well as damage and failure mechanisms were investigated. Published by Elsevier Ltd.
C1 [Ruggles-Wrenn, M. B.; Szymczak, N. R.] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Ruggles-Wrenn, MB (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM marina.ruggles-wrenn@afit.edu
RI Ruggles-Wrenn, Marina/J-6103-2014
FU Propulsion Directorate; Air Force Research Laboratory
FX The financial Support of Dr. R. Sikorski and Dr. J. Zelina, Propulsion
Directorate, Air Force Research Laboratory is highly appreciated.
NR 51
TC 12
Z9 12
U1 2
U2 11
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-835X
J9 COMPOS PART A-APPL S
JI Compos. Pt. A-Appl. Sci. Manuf.
PD DEC
PY 2008
VL 39
IS 12
BP 1829
EP 1837
DI 10.1016/j.compositesa.2008.09.005
PG 9
WC Engineering, Manufacturing; Materials Science, Composites
SC Engineering; Materials Science
GA 386GD
UT WOS:000261869400007
ER
PT J
AU Chen, Q
Chasiotis, I
Chen, C
Roy, A
AF Chen, Qi
Chasiotis, Ioannis
Chen, Chenggang
Roy, Ajit
TI Nanoscale and effective mechanical behavior and fracture of silica
nanocomposites
SO COMPOSITES SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Nanocomposites; Nanoparticles; Fracture; Deformation; Atomic force
microscopy (AFM)
ID CRACK DEFLECTION PROCESSES; BEAD FILLED EPOXIES; TOUGHENING MECHANISMS;
PARTICLE-SIZE; MICROMECHANICAL DEFORMATIONS; POLYCRYSTALLINE SILICON;
POLYMER NANOCOMPOSITES; ELASTIC PROPERTIES; SPHERICAL SILICA; NANO
PARTICLES
AB An experimental investigation of the composite and local mechanical and fracture behavior of an EPON based epoxy with 12 nm (primary) and 100 nm (secondary) fumed silica particles was carried out. The secondary particles promoted matrix stiffening at small weight fractions, which decreased at larger weight fractions and converged to that of the primary nanoparticles. The elastic modulus of the composites with 12-nm silica particles increased by as much as 30% for 15 wt.% silica loading. Atomic Force Microscopy coupled with Digital Image correlation (AFM/DIC) full-field strain measurements showed matrix strain localization in the vicinity of 100-nm fillers, which controlled the overall composite stiffness. In composites with 5 wt.% secondary particles, neighboring particles located at small proximities to each other behaved as single large particles or resulted in local matrix strain shielding. The tensile strength of all composites was independent of particle size and weight fraction, which was attributed to strong particle bonding and failure initiation in the matrix. The critical mode I stress intensity factor of 12-nm silica composites increased with silica weight fraction, by as much as 35% for 15 wt.% silica. SEM fractographs showed enhanced matrix yielding for 15 wt.% silica compared to-significant roughening of the fracture plane and void formation at smaller weight fractions. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Chen, Qi; Chasiotis, Ioannis] Univ Illinois, Urbana, IL 61801 USA.
[Chen, Chenggang] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Roy, Ajit] USAF, Res Lab, Dayton, OH 45469 USA.
RP Chasiotis, I (reprint author), Univ Illinois, 306 Talbot Lab,104 S Wright St, Urbana, IL 61801 USA.
EM chasioti@uiuc.edu
FU Air Force Office of Scientific Research (AFOSR) [FA9550-06-1-0140];
DURIP [FA9550-06-1-0428]
FX The authors gratefully acknowledge the support by the Air Force Office
of Scientific Research (AFOSR) through Grants FA9550-06-1-0140 and DURIP
FA9550-06-1-0428 with Dr. B.L. Lee as the program manager.
NR 40
TC 32
Z9 34
U1 4
U2 20
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0266-3538
J9 COMPOS SCI TECHNOL
JI Compos. Sci. Technol.
PD DEC
PY 2008
VL 68
IS 15-16
BP 3137
EP 3144
DI 10.1016/j.compscitech.2008.07.013
PG 8
WC Materials Science, Composites
SC Materials Science
GA 383JR
UT WOS:000261670400011
ER
PT J
AU Morscher, GN
Ojard, G
Miller, R
Gowayed, Y
Santhosh, U
Ahmad, J
John, R
AF Morscher, Gregory N.
Ojard, Greg
Miller, Robert
Gowayed, Yasser
Santhosh, Unni
Ahmad, Jalees
John, Reji
TI Tensile creep and fatigue of Sylramic-iBN melt-infiltrated SiC matrix
composites: Retained properties, damage development, and failure
mechanisms
SO COMPOSITES SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Ceramic matrix composites; Creep; Fatigue; Matrix cracking; Acoustic
emission
ID SIC/SIC COMPOSITES; STRESS; TEMPERATURE; BEHAVIOR
AB An understanding of the elevated temperature tensile creep, fatigue, rupture, and retained properties of ceramic matrix composites (CMC) envisioned for use in gas turbine engine applications is essential for component design and life-prediction. In order to quantify the effect of stress, time, temperature, and oxidation for a state-of-the-art composite system, a wide variety of tensile creep, dwell fatigue, and cyclic fatigue experiments were performed in air at 1204 degrees C for the SiC/SiC CIVIC system consisting of Sylramic-iBN SiC fibers, BN fiber interphase coating, and slurry-cast melt-infiltrated (MI) SiC-based matrix. Tests were either taken to failure or interrupted. Interrupted tests were then mechanically tested at room temperature to determine the residual properties. The retained properties of most of the composites subjected to tensile creep or fatigue were usually within 20% of the as-produced strength and 10% of the as-produced elastic modulus. It was observed that during creep, residual stresses in the composite are altered to some extent which results in an increased compressive stress in the matrix upon cooling and a subsequent increased stress required to form matrix cracks. Microscopy of polished sections and the fracture surfaces of specimens which failed during stressed-oxidation or after the room-temperature retained property test was performed on some of the specimens in order to quantify the nature and extent of damage accumulation that occurred during the test. It was discovered that the distribution of stress-dependent matrix cracking at 1204 degrees C was similar to the as-produced composites at room temperature; however, matrix crack growth occurred over time and typically did not appear to propagate through-the-thickness except at the final failure crack. Failure of the composites was due to either oxidation-induced unbridged crack growth, which dominated the higher stress regime (>= 179 MPa) or controlled by degradation of the fibers, probably caused by intrinsic creep-induced flaw growth of the fibers or internal attack of the fibers via Si diffusion through the CVI SiC and/or microcracks at the lower stress regime (<= 165 MPa). (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Morscher, Gregory N.] NASA, Glenn Res Ctr, Ohio Aerosp Inst, Cleveland, OH 44135 USA.
[John, Reji] USAF, Mat & Mfg Directorate, Res Lab, RXLMN, Wright Patterson AFB, OH 45433 USA.
[Ojard, Greg; Miller, Robert] Pratt & Whitney, E Hartford, CT USA.
[Gowayed, Yasser] Auburn Univ, Auburn, AL 36849 USA.
[Santhosh, Unni; Ahmad, Jalees] Res Applicat Inc, San Diego, CA USA.
RP Morscher, GN (reprint author), NASA, Glenn Res Ctr, Ohio Aerosp Inst, 21000 Brookpark Rd,MS 106-5, Cleveland, OH 44135 USA.
EM gmorscher@sbcglobal.net
FU Materials & Manufacturing Directorate; Air Force Research Laboratory
(AFRL/RXL); Wright-Patterson AFB [F33615-01-C-5234,
F33615-03-D-2354-D004]
FX The Materials & Manufacturing Directorate, Air Force Research Laboratory
(AFRL/RXL), Wright-Patterson AFB sponsored this work under contracts
F33615-01-C-5234 and F33615-03-D-2354-D004.
NR 19
TC 50
Z9 51
U1 4
U2 34
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0266-3538
J9 COMPOS SCI TECHNOL
JI Compos. Sci. Technol.
PD DEC
PY 2008
VL 68
IS 15-16
BP 3305
EP 3313
DI 10.1016/j.compscitech.2008.08.028
PG 9
WC Materials Science, Composites
SC Materials Science
GA 383JR
UT WOS:000261670400035
ER
PT J
AU Tschopp, MA
Tucker, GJ
McDowell, DL
AF Tschopp, M. A.
Tucker, G. J.
McDowell, D. L.
TI Atomistic simulations of tension-compression asymmetry in dislocation
nucleation for copper grain boundaries
SO COMPUTATIONAL MATERIALS SCIENCE
LA English
DT Article
DE Dislocations; Grain boundaries; Dislocation nucleation; Molecular
dynamics; Tension-compression asymmetry
ID MOLECULAR-DYNAMICS SIMULATION; STACKING-FAULT ENERGIES;
E-STRUCTURAL-UNIT; NANOCRYSTALLINE METALS; FCC METALS;
DEFORMATION-MECHANISM; BICRYSTAL INTERFACES; CRYSTAL PLASTICITY;
TWIN-BOUNDARY; PURE COPPER
AB Atomistic simulations are used to investigate how grain boundary structure influences dislocation nucleation under uniaxial tension and compression for a specific class of symmetric tilt grain boundaries that contain the E structural unit. After obtaining the minimum energy grain boundary structure, molecular dynamics was employed based on an embedded-atom method potential for copper at 10 K. Results show several differences in dislocation nucleation with respect to uniaxial tension and compression. First, the average nucleation stress for all < 110 > symmetric tilt grain boundaries is over three times greater in compression than in tension for both the high strain rate and quasistatic simulations. Second, partial dislocations nucleate from the boundary on the {111} slip plane under uniaxial tension. However, partial and full dislocations nucleate from the boundary on the {100} and {111} slip planes under uniaxial compression. The full dislocation nucleation on the {100} plane for boundaries with misorientations near the coherent twin boundary is explained through the higher resolved shear stress on the {100} plane compared to the {111} plane. Last, individual dislocation nucleation mechanisms under uniaxial tension and compression are analyzed. For the vicinal twin boundary under tension, the grain boundary partial dislocation is emitted into the lattice on the same {111} plane that it dissociated onto. For compression of the vicinal twin, the 1/3 < 111 > disconnection is removed through full dislocation emission on the {100} plane and partial dislocation emission parallel to the coherent twin boundary plane, restoring the boundary to the coherent twin. For the Sigma 19 boundary, the nearly simultaneous emission of numerous partial dislocations from the boundary result in the formation of the hexagonal close-packed (HCP) phase. (C) 2008 Elsevier B.V. All rights reserved.
C1 [McDowell, D. L.] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[Tschopp, M. A.; Tucker, G. J.; McDowell, D. L.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Tschopp, M. A.] USAF, Res Lab, RXLMN UTC, Wright Patterson AFB, OH 45433 USA.
RP McDowell, DL (reprint author), Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
EM david.mcdowell@me.gatech.edu
RI Tschopp, Mark/B-1594-2008; Tucker, Garritt/A-1954-2016
OI Tschopp, Mark/0000-0001-8471-5035; Tucker, Garritt/0000-0002-4011-450X
FU National Science Foundation Graduate Research Fellowship; National
Center for Supercomputing Applications [DMR060019N]
FX This material is based upon work supported under a National Science
Foundation Graduate Research Fellowship (M.A.T.). This work was
partially supported by the National Center for Supercomputing
Applications under DMR060019N and utilized Cobalt. D.L.M. is grateful
for the additional support of this work by the Carter N. Paden, Jr.
Distinguished Chair in Metals Processing.
NR 72
TC 42
Z9 42
U1 4
U2 56
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-0256
EI 1879-0801
J9 COMP MATER SCI
JI Comput. Mater. Sci.
PD DEC
PY 2008
VL 44
IS 2
BP 351
EP 362
DI 10.1016/j.commatsci.2008.03.041
PG 12
WC Materials Science, Multidisciplinary
SC Materials Science
GA 384FW
UT WOS:000261731700021
ER
PT J
AU Branson, RD
Robinson, B
Blakeman, TC
Johannigman, JA
AF Branson, Richard D.
Robinson, Bryce
Blakeman, Thomas C.
Johannigman, Jay A.
TI ONE VENTILATOR- FOUR PATIENTS A LUNG MODEL STUDY
SO CRITICAL CARE MEDICINE
LA English
DT Meeting Abstract
CT 38th Critical Care Congress of the Society-of-Critical-Care-Medicine
CY JAN 31-FEB 04, 2009
CL Nashville, TN
SP Soc Crit Care Med
C1 [Branson, Richard D.; Robinson, Bryce; Blakeman, Thomas C.] Univ Cincinnati, Cincinnati, OH USA.
[Johannigman, Jay A.] USAF, CSTARS, Cincinnati, OH USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD DEC
PY 2008
VL 36
IS 12
SU S
MA 545
BP A137
EP A137
PG 1
WC Critical Care Medicine
SC General & Internal Medicine
GA 376WM
UT WOS:000261213700509
ER
PT J
AU Putnam, AT
Roertger, RH
Smith, DL
AF Putnam, Adin T.
Roertger, Richard H.
Smith, David L.
TI ACUTE MERCURY TOXICITY DUE TO HOLLOW POINT MERCURY TIPPED BULLETS:
SUCCESSFUL MEDICAL AND SURGICAL TREATMENT
SO CRITICAL CARE MEDICINE
LA English
DT Meeting Abstract
CT 38th Critical Care Congress of the Society-of-Critical-Care-Medicine
CY JAN 31-FEB 04, 2009
CL Nashville, TN
SP Soc Crit Care Med
C1 [Putnam, Adin T.] Carilion Clin, Fincastle, VA USA.
[Roertger, Richard H.] Greenville Mem Med Ctr, Greenville, SC USA.
[Smith, David L.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD DEC
PY 2008
VL 36
IS 12
SU S
MA 714
BP A185
EP A185
PG 1
WC Critical Care Medicine
SC General & Internal Medicine
GA 376WM
UT WOS:000261213700678
ER
PT J
AU Ritchie, SA
Kobayashi, T
Sperling, L
AF Ritchie, Simon A.
Kobayashi, Todd
Sperling, Leonard
TI Amyopathic Necrotizing Dermatomyositis Secondary to an Underlying
Malignancy: A Case Report and Review of the Literature
SO CUTIS
LA English
DT Article
ID CUTANEOUS LESIONS; OVARIAN-CANCER; SINE MYOSITIS; POLYMYOSITIS;
ASSOCIATION; CARCINOMA; DIAGNOSIS; LYMPHOMA; DISEASES; COHORT
AB GOAL
To understand dermatomyositis (DM) to better manage patients with the condition
LEARNING OBJECTIVES Upon completion of this activity, dermatologists and general practitioners should be able to:
1. Define the diagnostic criteria for classic DM.
2. Differentiate between autoantibodies relevant to classic DIM and other variants of the disease.
3. Discuss the relationship between DIM and malignancies.
INTENDED AUDIENCE
This CME activity is designed for dermatologists and generalists. CME Test on page 414. This article has been peer reviewed and approved by Michael Fisher, MD, Professor of Medicine, Albert Einstein College of Medicine. Review date: November 2008.
This activity has been planned and implemented in accordance with the Essential Areas and Policies of the Accreditation Council for Continuing Medical Education through the joint sponsorship of Albert Einstein College of Medicine and Quadrant HealthCom. Inc. Albert Einstein College of Medicine is accredited by the ACCME to provide continuing medical education for physicians.
Albert Einstein College of Medicine designates this educational activity for a maximum of 1 AMA PRA Category 1 Credit (TM). Physicians should only claim credit commensurate with the extent of their participation in the activity.
This activity has been planned and produced in accordance with ACCME Essentials.
C1 [Kobayashi, Todd] USAF Acad, Dermatol Serv, Colorado Springs, CO 80840 USA.
[Sperling, Leonard] Uniformed Serv Univ Hlth Sci, Dept Dermatol, Bethesda, MD 20814 USA.
RP Ritchie, SA (reprint author), PSC 2 Box 1395, APO, AP 96264 USA.
EM simonaritchie@hotmail.com
NR 39
TC 3
Z9 3
U1 1
U2 1
PU QUADRANT HEALTHCOM INC
PI PARSIPPANY
PA 7 CENTURY DRIVE, STE 302, PARSIPPANY, NJ 07054-4603 USA
SN 0011-4162
J9 CUTIS
JI Cutis
PD DEC
PY 2008
VL 82
IS 6
BP 407
EP 413
PG 7
WC Dermatology
SC Dermatology
GA 388FW
UT WOS:000262006700005
PM 19181030
ER
PT J
AU Maturo, SC
Wiseman, J
Mair, E
AF Maturo, Stephen C.
Wiseman, Joe
Mair, Eric
TI Transantral endoscopic repair of orbital floor fractures with the use of
a flexible endoscope holder: A cadaver study
SO ENT-EAR NOSE & THROAT JOURNAL
LA English
DT Article
AB We conducted a cadaver study to determine the ease of use and functionality of a flexible endoscope holder in the visualization and repair of orbital floor fractures via a transantral approach. Four fresh cadaver heads were dissected through a sublabial antrotomy incision with a 30 degrees endoscope attached to a flexible holder. An implant was placed to restore the normal anatomy. With the use of this exclusive endoscopic approach, all orbital floor fractures were identified in their entirety and completely reduced with alloplastic material. We conclude that the flexible endoscope holder provides clearer visualization, greater instrument mobility, and an overall superior dissection and placement of implants in the endoscopic repair of orbital floor fractures.
C1 [Maturo, Stephen C.; Wiseman, Joe; Mair, Eric] Wilford Hall USAF Med Ctr, SanAntonio Uniformed Serv Hlth Educ Consortium, San Antonio, TX 78236 USA.
RP Maturo, SC (reprint author), Wilford Hall USAF Med Ctr, SanAntonio Uniformed Serv Hlth Educ Consortium, 2200 Bergquist Dr,Suite 1, San Antonio, TX 78236 USA.
EM maturo@lackland.af.mil
NR 10
TC 2
Z9 2
U1 0
U2 0
PU VENDOME GROUP LLC
PI NEW YORK
PA 149 FIFTH AVE, 10TH FLOOR, NEW YORK, NY 10010 USA
SN 0145-5613
J9 ENT-EAR NOSE THROAT
JI ENT-Ear Nose Throat J.
PD DEC
PY 2008
VL 87
IS 12
BP 693
EP 695
PG 3
WC Otorhinolaryngology
SC Otorhinolaryngology
GA V10PF
UT WOS:000207475200011
PM 19105145
ER
PT J
AU Spear, S
Iskandar, J
Seaquist, D
Sorensen, D
AF Spear, Samuel
Iskandar, John
Seaquist, Derek
Sorensen, Douglas
TI Nasoseptal chondrosarcoma resection requiring anterior fossa floor
repair: A case report
SO ENT-EAR NOSE & THROAT JOURNAL
LA English
DT Article
AB We present a case in which a 23-year-old male patient diagnosed with nasoseptal chondrosarcoma with anterior cranial fossa extension underwent combined surgical approaches to optimize complete resection of the tumor. Surgery was followed by a 6-month course of proton-beam radiation therapy. Extensive tumors of this type with significant intracranial extension require surgical repair of the anterior fossa floor. We employed a repair technique not previously associated with the resection of these tumors, using a split-calvaria osteoplastic rotational flap. This method provided structural integrity while avoiding the risks associated with the use of free bone grafts and metallic meshes.
C1 [Spear, Samuel] USAF, Madigan Army Med Ctr, ATTN MCHJ SET, Div Otolaryngol, Tacoma, WA 98431 USA.
[Iskandar, John] Madigan Army Med Ctr, Div Neurosurg, Tacoma, WA 98431 USA.
[Seaquist, Derek] Madigan Army Med Ctr, Dept Pathol, Tacoma, WA 98431 USA.
RP Spear, S (reprint author), USAF, Madigan Army Med Ctr, ATTN MCHJ SET, Div Otolaryngol, Tacoma, WA 98431 USA.
EM samspear@gmail.com
NR 10
TC 2
Z9 2
U1 0
U2 0
PU VENDOME GROUP LLC
PI NEW YORK
PA 149 FIFTH AVE, 10TH FLOOR, NEW YORK, NY 10010 USA
SN 0145-5613
J9 ENT-EAR NOSE THROAT
JI ENT-Ear Nose Throat J.
PD DEC
PY 2008
VL 87
IS 12
BP 696
EP 699
PG 4
WC Otorhinolaryngology
SC Otorhinolaryngology
GA V10PF
UT WOS:000207475200012
PM 19105146
ER
PT J
AU Dalal, K
Woo, Y
Kelly, K
Galanis, C
Gonen, M
Fong, Y
Coit, D
AF Dalal, Kimberly Moore
Woo, Yanghee
Kelly, Kaitlyn
Galanis, Charles
Gonen, Mithat
Fong, Yuman
Coit, Daniel G.
TI Detection of micrometastases in peritoneal washings of gastric cancer
patients by the reverse transcriptase polymerase chain reaction
SO GASTRIC CANCER
LA English
DT Article
DE Gastric cancer; Peritoneal washings; Cytology; Micrometastases; RT-PCR
ID CURATIVE RESECTION; PROGNOSTIC VALUE; CARCINOEMBRYONIC ANTIGEN;
CLINICAL-IMPLICATIONS; PANCREATIC-CANCER; CARCINOMA; CELLS; CYTOLOGY;
EXPRESSION; DISEASE
AB Gastric cancer patients with positive (+) peritoneal cytology have a prognosis similar to stage IV patients. We studied the ability of quantitative reverse transcriptase polymerase chain reaction (RT-PCR) to detect peritoneal micrometastases in patients undergoing staging laparoscopy.
Peritoneal washings were obtained prospectively from 34 patients with gastric adenocarcinoma undergoing staging laparoscopy and 6 patients undergoing laparoscopy for benign disease. Each sample underwent cytologic and RTPCR analysis for tumor markers: carcinoembryonic antigen (CEA), cytokeratin 20 (CK20), survivin, and MUC2. Markers were evaluated on the basis of their deviance from the ideal marker.
Pathologic stages for the gastric cancer patients were: stage I, 9 (27%); stage II, 7 (21%); stage III, 15 (44%); and stage IV, 3 (9%). The four cytology (+) patients were: stage II, 1; stage III, 1; and stage IV, 2. Fifteen patients were RTPCR (+), including all cytology (+) patients. The optimal threshold for cycle amplification was 35, based on a receiver operating characteristic curve. CEA had the smallest deviance.
RT-PCR using a panel of tumor markers, including CEA, detects (+) cytology. The clinical significance of "false-positive" overexpression of CEA, survivin, or CK20 but cytology (-) remains to be defined. RT-PCR could represent a more sensitive method than cytology for detection of subclinical peritoneal tumor dissemination; this may be useful in improving patient selection for operative management and clinical trials.
C1 [Dalal, Kimberly Moore; Woo, Yanghee; Kelly, Kaitlyn; Galanis, Charles; Fong, Yuman; Coit, Daniel G.] Mem Sloan Kettering Canc Ctr, Dept Surg, New York, NY 10021 USA.
[Dalal, Kimberly Moore] David Grant US Air Force Med Ctr, Dept Surg, Travis AFB, CA USA.
[Dalal, Kimberly Moore] Univ Calif San Francisco, Dept Surg, San Francisco, CA 94143 USA.
[Gonen, Mithat] Mem Sloan Kettering Canc Ctr, Dept Epidemiol & Biostat, New York, NY 10021 USA.
RP Coit, D (reprint author), Mem Sloan Kettering Canc Ctr, Dept Surg, 1275 York Ave, New York, NY 10021 USA.
RI Gonen, Mithat/E-4826-2012
NR 31
TC 22
Z9 23
U1 0
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1436-3291
J9 GASTRIC CANCER
JI Gastric Cancer
PD DEC
PY 2008
VL 11
IS 4
BP 206
EP 213
DI 10.1007/s10120-008-0483-6
PG 8
WC Oncology; Gastroenterology & Hepatology
SC Oncology; Gastroenterology & Hepatology
GA 393TM
UT WOS:000262395900005
PM 19132482
ER
EF