FN Thomson Reuters Web of Science™ VR 1.0 PT J AU DUBINSKI, J CHRISTODOULOU, DM AF DUBINSKI, J CHRISTODOULOU, DM TI SELF-GRAVITY AND DISSIPATION IN POLAR RINGS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ISM; GALAXIES, KINEMATICS AND DYNAMICS; GALAXIES, STRUCTURE; METHODS, NUMERICAL ID S0 GALAXIES; GAS DISKS; DARK HALO; EVOLUTION; MODEL AB Studies of inclined rings inside galaxy potentials have mostly considered the influence of self-gravity and viscous dissipation separately. In this study, we construct models of highly inclined (''polar'') rings in an external potential including both self-gravity and dissipation due to a drag force. We do not include pressure forces and thus ignore shock heating that dominates the evolution of gaseous rings inside strongly nonspherical potentials. We adopt an oblate spheroidal scale-free logarithmic potential with axis ratio q = 0.85 and an initial inclination of 80-degrees for the self-gravitating rings. We find that stellar (dissipationless) rings suffer from mass loss during their evolution. Mass loss also drives a secular change of the mean inclination toward the poles of the potential. As much as half of the ring mass escapes in the process and forms an inner and an outer shell of precessing orbits. If the remaining mass is more than approximately 0.02 of the enclosed galaxy mass, rings remain bound and do not fall apart from differential precession. The rings precess at a constant rate for more than a precession period tau(p) finding the configuration predicted by Sparke in 1986 which warps at larger radii toward the poles of the potential. We model shear viscosity with a velocity-dependent drag force and find that nuclear inflow dominates over self-gravity if the characteristic viscous inflow time scale tau(vi) is shorter than approximately 25tau(p). Rings with tau(vi)/tau(p) less than or similar to 25 collapse toward the nucleus of the potential within one precession period independent of the amount of self-gravity. Our results imply that stars and gas in real polar rings exhibit markedly different dynamical evolutions. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 31 TC 8 Z9 8 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 1994 VL 424 IS 2 BP 615 EP 626 DI 10.1086/173918 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NC793 UT WOS:A1994NC79300009 ER PT J AU EVANS, NJ BALKUM, S LEVREAULT, RM HARTMANN, L KENYON, S AF EVANS, NJ BALKUM, S LEVREAULT, RM HARTMANN, L KENYON, S TI MOLECULAR OUTFLOWS FROM FU ORIONIS STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, JETS AND OUTFLOWS; ISM, MOLECULES; STARS, VARIABLES, OTHER (FU ORIONIS) ID Z-CANIS MAJORIS; BIPOLAR OUTFLOW; MASS-LOSS; OBJECTS; CLOUDS; ACCRETION; MODELS; WINDS; L1287; JET AB We have detected molecular outflows toward six out of eight FU Orionis stars that we observed in the J = 3 --> 2 line of CO. Notably, FU Orionis itself does not show an outflow. Four of the souces were mapped, and two show evidence for multiple outflows. In both Z CMa and RNO 1b, nearby infrared sources may also be driving the outflows. Mass-loss rates derived from the usual assumptions of momentum conservation range from 3 x 10(-8) M. yr-1 to 2 x 10(-6) M. yr-1 without corrections for optical depth in the CO lines. Corrections for optical depth raise these estimates by a factor of 5 on average. If the outflows are driven by repeated outbursts with peak mass-loss rates of 10(-5) M. yr-1, a duty cycle of 10(-3) to 10(-1) would be implied, consistent with other recent evidence. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP EVANS, NJ (reprint author), UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712, USA. OI Kenyon, Scott/0000-0003-0214-609X NR 32 TC 44 Z9 44 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 1994 VL 424 IS 2 BP 793 EP 799 DI 10.1086/173931 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NC793 UT WOS:A1994NC79300022 ER PT J AU PONOMAREV, VO SMITH, HA STRELNITSKI, VS AF PONOMAREV, VO SMITH, HA STRELNITSKI, VS TI MODELING OF THE HYDROGEN MASER DISK IN MWC-349 SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; MASERS; RADIO LINES, STARS; STARS, INDIVIDUAL (MWC-349) ID RECOMBINATION LINE MASER; MWC349; STAR AB Maser amplification in a Keplerian circumstellar disk seen edge on-the idea put forward by Gordon (1992), Martin-Pintado, & Serabyn (1992), and Thum, Martin-Pintado, & Bachiller (1992) to explain the millimeter hydrogen recombination lines in MWC 349-is further justified and developed here. The double-peaked (vs. possible triple-peaked) form of the observed spectra is explained by the reduced emission from the inner portion of the disk, the portion responsible for the central (''zero velocity'') component of a triple-peaked spectrum. Radial gradient of electron density and/or free-free absorption within the disk are identified as the probable causes of this central ''hole'' in the disk and of its opacity. We calculate a set of synthetic maser spectra radiated by a homogeneous Keplerian ring seen edge-on and compare them to the H30alpha observations of Thum et al., averaged over about 1000 days. We used a simple graphical procedure to solve an inverse problem and deduced the probable values of some basic disk and maser parameters. We find that the maser is essentially unsaturated, and that the most probable values of electron temperature, Doppler width of the microturbulence, and electron density, all averaged along the amplification path are, correspondingly, T(e) less-than-or-equal-to 11,000 K, v(micro) less-than-or-equal-to 14 km s-1, n(e) almost-equal-to (3 +/- 2) x 10(7) cm-3. The model shows that radiation at every frequency within the spectrum arises in a monochromatic ''hot spot.'' The maximum optical depth within the 'hot spot '' producing radiation at the spectral peak maximum is tau(max) almost-equal-to 6 +/- 1; the effective width of the masing ring is almost-equal-to 0.4-0.7 times its outer diameter; the size of the ''hot spot'' responsible for the radiation at the spectral peak frequency is almost-equal-to 0.2-0.3 times the distance between the two ''hot spots'' corresponding to two peaks. An important derivation of our model is the dynamical mass of the central star, M* almost-equal-to 26 M.(D/1.2 kpc), D being the distance to the star. Prospects for improving the model are discussed. C1 SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20560. RP PONOMAREV, VO (reprint author), PN LEBEDEV PHYS INST,MOSCOW,RUSSIA. NR 17 TC 29 Z9 29 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 1994 VL 424 IS 2 BP 976 EP 982 DI 10.1086/173947 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NC793 UT WOS:A1994NC79300038 ER PT J AU CUTRI, RM HUCHRA, JP LOW, FJ BROWN, RL VANDENBOUT, PA AF CUTRI, RM HUCHRA, JP LOW, FJ BROWN, RL VANDENBOUT, PA TI IRAS F15307+3252 - A HYPERLUMINOUS INFRARED GALAXY AT Z=0.93 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (IRAS F15307+3252); GALAXIES, PHOTOMETRY; GALAXIES, STARBURST; INFRARED, GALAXIES ID RADIO AB A new hyperluminous infrared galaxy in the IRAS Faint Source Catalog is identified at a redshift of 0.93. This object has a bolometric luminosity of approximately 10(13) L., a very large ratio of infrared-to-optical luminosity, warm dust emission, a ratio of infrared-to-radio flux densities consistent with other infrared galaxies, and an optical spectrum similar to a Seyfert 2 galaxy. IRAS F15307+3552 shares these characteristics and its radio-to-optical spectral energy distribution with two other infrared galaxies, F10214+4724 and P09104+4109. Discovery of a third object with these properties defines an extreme subclass of ultraluminous galaxies powered primarily by star formation. The systematic method used to find this object begins the process of determining the space density of these most luminous examples of the infrared galaxy phenomenon. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL RADIO ASTRON OBSERV,CHARLOTTESVILLE,VA 22903. RP CUTRI, RM (reprint author), UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721, USA. NR 11 TC 57 Z9 57 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 1994 VL 424 IS 2 BP L65 EP L68 DI 10.1086/187276 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NC795 UT WOS:A1994NC79500001 ER PT J AU STAUFFER, JR CAILLAULT, JP GAGNE, M PROSSER, CF HARTMANN, LW AF STAUFFER, JR CAILLAULT, JP GAGNE, M PROSSER, CF HARTMANN, LW TI A DEEP IMAGING SURVEY OF THE PLEIADES WITH ROSAT SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE OPEN CLUSTERS AND ASSOCIATIONS, INDIVIDUAL (PLEIADES); STARS, LATE-TYPE; SURVEYS; X-RAYS, STARS ID LOW-MASS STARS; PROPER-MOTION MEMBERSHIP; X-RAY-EMISSION; ROTATIONAL VELOCITIES; CHROMOSPHERIC ACTIVITY; HYADES CLUSTER; FAINT MEMBERS; FLARE STARS; SEARCH; DWARFS AB We have obtained deep ROSAT images of three regions within the Pleiades open cluster. We have detected 317 x-ray sources in these ROSA T PSPC images, 171 of which we associate with certain or probable members of the Pleiades cluster. We detect nearly all Pleiades members with spectral types later than G0 and within 25 arcminutes of our three field centers where our sensitivity is highest. This has allowed us to derive for the first time the luminosity function for the G, K, and M dwarfs of an open cluster without the need to use statistical techniques to account for the presence of upper limits in the data sample. Because of our high X-ray detection frequency down to the faint limit of the optical catalog, we suspect that some of our unidentified X-ray sources are previously unknown, very low-mass members of the Pleiades. A large fraction of the Pleiades members detected with ROSAT have published rotational velocities. Plots of L(X)/L(Bol) versus spectroscopic rotational velocity show tightly correlated ''saturation'' type relations for stars with (B - V)0 greater-than-or-equal-to 0.60. For each of several color ranges, X-ray luminosities rise rapidly with increasing rotation rate until upsilon sin i congruent-to 15 km s-1, and then remain essentially flat for rotation rates up to at least upsilon sin i approximately 100 km s-1. The dispersion in rotation among low-mass stars in the Pleiades is by far the dominant contributor to the dispersion in L(X) at a given mass. Only about 35% of the B, A, and early F stars in the Pleiades are detected as X-ray sources in our survey. There is no correlation between X-ray flux and rotation for these stars. The X-ray luminosity function for the early-type Pleiades stars appears to be bimodal-with only a few exceptions, we either detect these stars at fluxes in the range found for low-mass stars or we derive X-ray limits below the level found for most Pleiades dwarfs. The X-ray spectra for the early-type Pleiades stars detected by ROSA T are indistinguishable from the spectra of the low-mass Pleiades members. We believe that the simplest explanation for this behavior is that the early-type Pleiades stars are not themselves intrinsic X-ray sources and that the X-ray emission actually arises from low-mass companions to these stars. C1 UNIV GEORGIA,DEPT PHYS & ASTRON,ATHENS,GA 30602. RP STAUFFER, JR (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Gagne, Marc/C-1130-2013 NR 61 TC 243 Z9 243 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD APR PY 1994 VL 91 IS 2 BP 625 EP & DI 10.1086/191951 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NB221 UT WOS:A1994NB22100006 ER PT J AU CHOE, JC AF CHOE, JC TI SEXUAL SELECTION AND MATING SYSTEM IN ZOROTYPUS-GURNEYI CHOE (INSECTA, ZORAPTERA) .2. DETERMINANTS AND DYNAMICS OF DOMINANCE SO BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY LA English DT Article DE AGE; DOMINANCE; LIFE-HISTORY STRATEGY; SIZE; ZORAPTERA ID HIERARCHY FORMATION; SIZE; THYSANOPTERA; EVOLUTION; HISTORY; AGE AB Body size is clearly an important factor influencing the outcome of agonistic contests, but is often weakly correlated with dominance ranks in Zorotypus gurneyi Choe (Insecta: Zoraptera). The study of the development and dynamics of dominance relations using artificially constructed colonies show that age, or tenure within the colony, is the prime determinant of dominance among males. Dominance hierarchies become relatively stable within 2 or 3 days and males that emerge later normally begin at the bottom of the hierarchy regardless of size. Males interact much more frequently when they are simultaneously introduced to each other than when they are allowed to emerge at different times. In the latter case, males that emerge late appear to recognize relative dominance of older males and avoid direct contests. Considering the high correlation between dominance rank and mating success, there is a strong selective advantage to males that emerge earlier and such pressure of sexual selection may be responsible for the difference in life history strategies between Z. gurneyi and its sympatric congener, Z. barberi Gurney, in central Panama. C1 HARVARD UNIV,BIOL LABS,DEPT ORGANISM & EVOLUT BIOL,CAMBRIDGE,MA 02138. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 31 TC 12 Z9 12 U1 1 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5443 J9 BEHAV ECOL SOCIOBIOL JI Behav. Ecol. Sociobiol. PD APR PY 1994 VL 34 IS 4 BP 233 EP 237 PG 5 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA NK992 UT WOS:A1994NK99200001 ER PT J AU STRONG, MT AF STRONG, MT TI NEW INFORMATION ON THE TYPE LOCALITY OF BULBOSTYLIS-SCHOMBURGKIANA (CYPERACEAE) SO BRITTONIA LA English DT Note DE CYPERACEAE; SOUTH AMERICA; BRAZIL; BULBOSTYLIS RP STRONG, MT (reprint author), SMITHSONIAN INST,DEPT BOT,MRC-166,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU NEW YORK BOTANICAL GARDEN PI BRONX PA PUBLICATIONS DEPT, BRONX, NY 10458 SN 0007-196X J9 BRITTONIA JI Brittonia PD APR-JUN PY 1994 VL 46 IS 2 BP 151 EP 152 DI 10.1007/BF02828269 PG 2 WC Plant Sciences SC Plant Sciences GA NU976 UT WOS:A1994NU97600010 ER PT J AU CONDIT, R HUBBELL, SP FOSTER, RB AF CONDIT, R HUBBELL, SP FOSTER, RB TI DENSITY-DEPENDENCE IN 2 UNDERSTORY TREE SPECIES IN A NEOTROPICAL FOREST SO ECOLOGY LA English DT Article DE BARRO-COLORADO ISLAND, PANAMA; DENSITY DEPENDENCE; 50-HA FOREST DYNAMICS PLOT; NEIGHBORHOOD EFFECTS; PLANT POPULATION DYNAMICS; RECRUITMENT; TREE SURVIVAL AND GROWTH; TROPICAL TREE DEMOGRAPHY ID JANZEN-CONNELL MODEL; TROPICAL TREE; SEED DISPERSAL; DIVERSITY; RECRUITMENT; SURVIVAL; DYNAMICS; CONSEQUENCES; INTERFERENCE; DEMOGRAPHY AB Density dependence was examined in two species of neotropical treelets, Faramea occidentalis and Desmopsis panamensis, in a 50-ha plot on Barro Colorado Island in Panama. Survival and growth probability of plants larger than 1 cm dbh (diameter at breast height), and recruitment into the 1-cm class, were assessed as a function of the number of conspecific neighbors in various distance and size classes. Density-dependent effects on survival and growth were strong in Faramea. Performance of 1-8 cm dbh plants declined with increasing numbers of adult neighbors within 1 m, 1-2 m, and 2-4 m, but neighbors at 4-6 m had no effect. Performance also declined with increasing numbers of juvenile neighbors <4 cm dbh, but the effect was less pronounced. Saplings of Faramea grew poorly in areas of high juvenile density within 30 m, independent of the effects caused by neighbors within 4 m. In contrast to Faramea, Desmopsis showed no density dependence in survival nor in growth. For recruitment, however, the two species showed similar patterns: recruit density was lower in regions with an adult conspecific within 1 or 2 m distance, but higher in regions with high densities of adult or juvenile conspecifics between 2 and 30-60 m. Desmopsis must have suffered density-dependent effects at stages < 1 cm dbh, but the effect vanished by the 1 cm dbh stage. In Faramea, strong neighborhood effects were evident in all size classes < 8 cm dbh. C1 PRINCETON UNIV,DEPT ECOL & EVOLUT BIOL,PRINCETON,NJ 08544. FIELD MUSEUM NAT HIST,DEPT BOT,CHICAGO,IL 60605. RP CONDIT, R (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO,AA 34002, USA. NR 38 TC 89 Z9 104 U1 2 U2 22 PU ECOLOGICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE, NW, STE 400, WASHINGTON, DC 20036 SN 0012-9658 J9 ECOLOGY JI Ecology PD APR PY 1994 VL 75 IS 3 BP 671 EP 680 DI 10.2307/1941725 PG 10 WC Ecology SC Environmental Sciences & Ecology GA NE029 UT WOS:A1994NE02900009 ER PT J AU CRAIG, CL BERNARD, GD CODDINGTON, JA AF CRAIG, CL BERNARD, GD CODDINGTON, JA TI EVOLUTIONARY SHIFTS IN THE SPECTRAL PROPERTIES OF SPIDER SILKS SO EVOLUTION LA English DT Article DE SPECTRAL PROPERTIES; SPIDERS; SPIDER SILKS ID WEB-SPINNING SPIDERS; WEAVING SPIDERS; DRAGLINE SILK; BEHAVIOR; ARANEAE; FIBERS AB We measured the reflectance properties of unpigmented silks spun by a systematic array of primitive (Deinopoidea) and derived (Araneoidea) aerial, web-spinning spiders, as well as silks spun by Araneomorphae and Mygalomorphae spiders that do not spin aerial webs. Our data show that all of the primitive aerial web spinners produce catching silks with a spectral peak in the ultraviolet (UV), and cladistic analysis suggests that high UV reflection is the primitive character state for silk spectral properties. In contrast, ah of the derived aerial web spinners produce silks that are spectrally Aat or characterized by reduced reflectance in the UV. Correlated with the evolution of these catching silks is a 37-fold increase in species number and apparent habitat expansion. This suggests that the unique silk proteins spun by the araneoids have been important to their ecological and evolutionary diversity. C1 UNIV WASHINGTON,DEPT ELECT ENGN,SEATTLE,WA 98195. SMITHSONIAN INST,DEPT ENTOMOL,WASHINGTON,DC 20560. RP CRAIG, CL (reprint author), YALE UNIV,OSBORN MEM LABS,DEPT BIOL,NEW HAVEN,CT 06511, USA. NR 35 TC 53 Z9 54 U1 2 U2 17 PU SOC STUDY EVOLUTION PI LAWRENCE PA 810 E 10TH STREET, LAWRENCE, KS 66044 SN 0014-3820 J9 EVOLUTION JI Evolution PD APR PY 1994 VL 48 IS 2 BP 287 EP 296 DI 10.2307/2410093 PG 10 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA PQ539 UT WOS:A1994PQ53900005 ER PT J AU CHEETHAM, AH JACKSON, JBC HAYEK, LAC AF CHEETHAM, AH JACKSON, JBC HAYEK, LAC TI QUANTITATIVE GENETICS OF BRYOZOAN PHENOTYPIC EVOLUTION .2. ANALYSIS OF SELECTION AND RANDOM CHANGE IN FOSSIL SPECIES USING RECONSTRUCTED GENETIC-PARAMETERS SO EVOLUTION LA English DT Article DE BRYOZOA; GENETIC DRIFT; HERITABILITY; METRARABDOTOS; MUTATION; NATURAL SELECTION; PHENOTYPIC EVOLUTION; QUANTITATIVE GENETICS; STABILIZING SELECTION ID NATURAL-SELECTION; MORPHOLOGICAL-DIFFERENTIATION; NEOGENE BRYOZOAN; DARWIN FINCHES; CHARACTERS; POPULATION; TEMPO; TESTS; SPECIATION; PEROMYSCUS AB The roles of natural selection and random genetic change in the punctuated phenotypic evolution of eight Miocene-Pliocene tropical American species of the cheilostome bryozoan Metrarabdotos are analyzed by quantitative genetic methods. Trait heritabilities and genetic covariances reconstructed by partitioning within- and among-colony phenotypic variance are similar to those previously obtained for living species of the cheilostome Stylopoma using breeding data. The hypothesis that differences in skeletal morphology between species of Metrarabdotos are entirely due to mutation and genetic drift cannot be rejected for reasonable rates of mutation maintained for periods brief enough to account for the geologically abrupt appearances of these species in the fossil record. Except for one pair of species, separated by the largest morphologic distance, directional selection acting alone would require unrealistically high rates of selective mortality to be maintained for these periods. Thus, directional selection is not strongly implicated in the divergence of Metrarabdotos species. Within species, rates of net phenotypic change are slow enough to require stabilizing selection, but mask large, relatively rapid fluctuations, all of which, however, can be attributed to chance departures from the mean phenotype by mutation and genetic drift, rather than to tracking environmental fluctuation by directional selection. The results are consistent with genetic models involving shifts between multiple adaptive peaks on which phenotypes remain more or less static through long-term stabilizing selection. Regardless of the degree to which directional selection may be involved in peak shifts, phenotypic differentiation is thus related to processes different than the pervasive stabilizing selection acting within species. C1 SMITHSONIAN TROP RES INST,CTR PALEOECOL,BALBOA,PANAMA. RP CHEETHAM, AH (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT PALEOBIOL,WASHINGTON,DC 20560, USA. NR 44 TC 33 Z9 33 U1 1 U2 4 PU SOC STUDY EVOLUTION PI LAWRENCE PA 810 E 10TH STREET, LAWRENCE, KS 66044 SN 0014-3820 J9 EVOLUTION JI Evolution PD APR PY 1994 VL 48 IS 2 BP 360 EP 375 DI 10.2307/2410098 PG 16 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA PQ539 UT WOS:A1994PQ53900010 ER PT J AU MASON, BH AF MASON, BH TI GOLDSCHMIDT,V.M. MEDAL AND SHROCK,LESTER,W. AND FAMILY HONORARIUM SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Item About an Individual RP MASON, BH (reprint author), NATL MUSEUM NAT HIST,SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD APR PY 1994 VL 58 IS 8 BP 1983 EP 1983 DI 10.1016/0016-7037(94)90430-8 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA NJ318 UT WOS:A1994NJ31800010 ER PT J AU WOOD, JA HOLMBERG, BB AF WOOD, JA HOLMBERG, BB TI CONSTRAINTS PLACED ON THE CHONDRULE-FORMING PROCESS BY MERRIHUEITE IN THE MEZO-MADARAS CHONDRITE SO ICARUS LA English DT Article ID SOLAR NEBULA; GROWTH; DUST; BEARING AB A few unusual chondrules in the Mezo-Madaras L3 chondrite contain the peralkaline mineral merrihueite, (K,Na)2(Fe,Mg)5 Si12O30, formed by reaction of free silica in the chondrules with K,Na,Fe-rich nebular gas. Vapor fractionation was required to create chondrules poor in Al and rich in Si, and the fractionated condensate produced had to aggregate into protochondrules very promptly (on the order of hours or less) to prevent it from mixing with dust of more generalized composition in the nebula. The traditional paradigm for chondrule formation, involving a series of unrelated events (chemical fractionation of precursor dust; clumping of the dust; melting of the dust-clumps), is inadequate for making these chondrules. A rapid process, all stages of which are related, is required. We propose that this occurred during the cooling and contraction of the volume of hot gas created by a small transient high-energy event in the nebula, of unspecified nature. Microdroplets of silicate melt created by condensation from the cooling, contracting gas had velocity vectors directed toward the center of the volume. Coalescence occurred in the crowded central zone where the microdroplets converged. The Mezo-Madaras merrihueite-bearing chondrules may have been formed by an atypically low-energy nebular event, which achieved the needed chemical fractionations by only partially vaporizing precursor dust. More commonplace chondrule types may have been created by the same basic process, but involving higher-energy events in which precursor dust was completely vaporized and recondensed. (C) 1994 Academic Press, Inc. RP WOOD, JA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 49 TC 12 Z9 12 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD APR PY 1994 VL 108 IS 2 BP 309 EP 324 DI 10.1006/icar.1994.1065 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NY462 UT WOS:A1994NY46200016 ER PT J AU STURTEVANT, WC AF STURTEVANT, WC TI THE MISCONNECTION OF GUALE AND YAMASEE WITH MUSKOGEAN SO INTERNATIONAL JOURNAL OF AMERICAN LINGUISTICS LA English DT Article RP STURTEVANT, WC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 31 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0020-7071 J9 INT J AM LINGUIST JI Int. J. Am. Linguist. PD APR PY 1994 VL 60 IS 2 BP 139 EP 148 DI 10.1086/466226 PG 10 WC Linguistics; Language & Linguistics SC Linguistics GA NR704 UT WOS:A1994NR70400003 ER PT J AU AGORAMOORTHY, G AF AGORAMOORTHY, G TI ADULT MALE REPLACEMENT AND SOCIAL-CHANGE IN 2 TROOPS OF HANUMAN LANGURS (PRESBYTIS-ENTELLUS) AT JODHPUR, INDIA SO INTERNATIONAL JOURNAL OF PRIMATOLOGY LA English DT Article DE HANUMAN LANGUR; PRESBYTIS-ENTELLUS; SOCIAL CHANGE; INFANTICIDE; FOOD COMPETITION ID INFANTICIDE; COMPETITION; RAJASTHAN; BEHAVIOR; MONKEYS AB I studied the process of adult male replacement and social change in two one-male troops (B20 and B21) of hanuman langurs (Presbytis entellus) at Jodhpur, India. Male-male competition lasted for about 6 months before the successful takeover of one troop (B20). During that period, five adult males from three neighboring bands (AMB7, AMB9, and AMB10) and a resident male of a neighboring troop (B21) were involved in taking over the troop. The latter male also copulated with six females during his interim residency, which suggests that he may have opportunistically maximized his mating chances with females of a neighboring group. During an intertroop interaction, a 14-month-old female infant of the other troop (B21) was fatally attacked by an adult female of the first troop and the infant eventually died. The attacker may have taken advantage of the disorganization created by male-male competition, perhaps to eliminate a future food competitor. In addition, the first troop gained an additional feeding area from the other troop's range; it included a sleeping site and a waterhole, indicating that territorial fights during social instability may have led to the expansion of the winner's resource area. C1 NATZ ZOOL PK,SMITHSONIAN INST,LONSERV & RES CTR,FRONT ROYAL,VA 22630. OHIO STATE UNIV,DEPT ZOOL,COLUMBUS,OH 43210. NR 35 TC 9 Z9 11 U1 1 U2 5 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0164-0291 J9 INT J PRIMATOL JI Int. J. Primatol. PD APR PY 1994 VL 15 IS 2 BP 225 EP 238 DI 10.1007/BF02735275 PG 14 WC Zoology SC Zoology GA NG928 UT WOS:A1994NG92800004 ER PT J AU JACOBBERGERJELLISON, PA AF JACOBBERGERJELLISON, PA TI FIRE-INDUCED REDDENING OF DUNE SANDS SO JOURNAL OF ARID ENVIRONMENTS LA English DT Article ID DESERT RP JACOBBERGERJELLISON, PA (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,CTR EARTH & PLANETARY STUDIES,WASHINGTON,DC 20560, USA. NR 19 TC 2 Z9 2 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0140-1963 J9 J ARID ENVIRON JI J. Arid. Environ. PD APR PY 1994 VL 26 IS 4 BP 305 EP 313 DI 10.1006/jare.1994.1033 PG 9 WC Ecology; Environmental Sciences SC Environmental Sciences & Ecology GA NH299 UT WOS:A1994NH29900001 ER PT J AU DALY, JW GARRAFFO, HM SPANDE, TF JARAMILLO, C RAND, AS AF DALY, JW GARRAFFO, HM SPANDE, TF JARAMILLO, C RAND, AS TI DIETARY SOURCE FOR SKIN ALKALOIDS OF POISON FROGS (DENDROBATIDAE) SO JOURNAL OF CHEMICAL ECOLOGY LA English DT Article DE ALKALOIDS; INDOLIZIDINES; PYRROLIZIDINES; HISTRIONICOTOXINS; COCCINELLINES; DENDROBATID FROGS; INSECTS; MILLIPEDES AB A wide range of alkaloids, many of which are unknown elsewhere in nature, occur in skin of frogs. Major classes of such alkaloids in dendrobatid frogs are the batrachotoxins, pumiliotoxins, histrionicotoxins, gephyrotoxins, and decahydroquinolines. Such alkaloids are absent in skin of frogs (Dendrobates auratus) raised in Panama on wingless fruit flies in indoor terraria. Raised on leaf-litter arthropods that were collected in a mainland site, such terraria-raised frogs contain tricyclic alkaloids including the beetle alkaloid precoccinelline, 1,4-disubstituted quinolizidines, pyrrolizidine oximes, the millipede alkaloid nitropolyzonamine, a decahydroquinoline, a gephyrotoxin, and histrionicotoxins. The profiles of these alkaloids in the captive-raised frogs are closer to the mainland population of Dendrobates auratus at the leaf-litter site than to the parent population of Dendrobates auratus from a nearby island site. Extracts of a seven-month sampling of leaf-litter insects contained precoccinelline, pyrrolizidine oxime 236 (major), and nitropolyzonamine (238). The results indicate a dietary origin for at least some ''dendrobatid alkaloids,'' in particular the pyrrolizidine oximes, the tricyclic coccinellines, and perhaps the histrionicotoxins and gephyrotoxins. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP DALY, JW (reprint author), NIH,BIOORGAN CHEM LAB,BETHESDA,MD 20892, USA. NR 12 TC 81 Z9 87 U1 3 U2 21 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0098-0331 J9 J CHEM ECOL JI J. Chem. Ecol. PD APR PY 1994 VL 20 IS 4 BP 943 EP 955 DI 10.1007/BF02059589 PG 13 WC Biochemistry & Molecular Biology; Ecology SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology GA NG403 UT WOS:A1994NG40300010 PM 24242207 ER PT J AU STANCIL, PC AF STANCIL, PC TI PARTITION-FUNCTIONS AND DISSOCIATION EQUILIBRIUM-CONSTANTS FOR H-2(+) AND HE-2(+) SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Note ID ASTROPHYSICAL INTEREST; DIATOMIC-MOLECULES AB Partition functions and dissociation equilibrium constants for the molecular ions H-2+ and He-2+ are presented for temperatures T in the range 1500(500)25,000 K and 2000(1000)75 000 K, respectively. The results are obtained by a direct sum of all electronic ground state rotational-vibrational levels whose energies are determined by solving the radial nuclear Schrodinger equation within the Born-Oppenheimer approximation. C1 OLD DOMINION UNIV, DEPT PHYS, NORFOLK, VA 23529 USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, CTR ASTROPHYS, MS 10, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 11 TC 7 Z9 7 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-4073 EI 1879-1352 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD APR PY 1994 VL 51 IS 4 BP 655 EP 658 DI 10.1016/0022-4073(94)90119-8 PG 4 WC Optics; Spectroscopy SC Optics; Spectroscopy GA NK481 UT WOS:A1994NK48100012 ER PT J AU LEIMGRUBER, P MCSHEA, WJ RAPPOLE, JH AF LEIMGRUBER, P MCSHEA, WJ RAPPOLE, JH TI PREDATION ON ARTIFICIAL NESTS IN LARGE FOREST BLOCKS SO JOURNAL OF WILDLIFE MANAGEMENT LA English DT Article DE ARTIFICIAL GROUND NESTS; FORESTS; NEOTROPICAL MIGRANTS; NEST PREDATION; VIRGINIA; REMOTE-TRIGGERED CAMERAS ID DEPREDATION; BIRDS; FRAGMENTATION; SELECTION; HABITAT; SUCCESS; EDGE AB Neotropical migrant birds are declining within many forest communities in North America and concern exists regarding the impact of forest fragmentation on their breeding success, particularly with respect to nest predation. We studied predation on artificial ground nests in large forest blocks to provide information for comparison with forest fragments and to determine the importance of predator community and vegetation. From May through August 1991, we distributed 320 artificial ground nests over 8 4-ha study plots and measured 12 vegetational variables at these nests. We used remote-triggered cameras to identify predators. Nest predation rates varied from 5 to 40% among study plots. Vertical vegetational density, horizontal log density, and percent herbaceous, rock, soil, and litter cover were different (P < 0.05) between successful and unsuccessful nests. A diverse predator community, including small mammals, is responsible for loss of artificial nests and predation rates are not solely a function of forest size. C1 NATL ZOOL PK,CONSERVAT & RES CTR,FRONT ROYAL,VA 22630. NR 36 TC 90 Z9 93 U1 2 U2 9 PU WILDLIFE SOC PI BETHESDA PA 5410 GROSVENOR LANE, BETHESDA, MD 20814-2197 SN 0022-541X J9 J WILDLIFE MANAGE JI J. Wildl. Manage. PD APR PY 1994 VL 58 IS 2 BP 254 EP 260 DI 10.2307/3809388 PG 7 WC Ecology; Zoology SC Environmental Sciences & Ecology; Zoology GA NF083 UT WOS:A1994NF08300010 ER PT J AU WEYANT, RS BURRIS, JA NICHOLS, DK WOO, E KINSEY, VS BOWER, DE BUKOWSKI, MM WEAVER, RE MOORE, TD AF WEYANT, RS BURRIS, JA NICHOLS, DK WOO, E KINSEY, VS BOWER, DE BUKOWSKI, MM WEAVER, RE MOORE, TD TI EPIZOOTIC FELINE PNEUMONIA ASSOCIATED WITH CENTERS-FOR-DISEASE-CONTROL GROUP EF-4A BACTERIA SO LABORATORY ANIMAL SCIENCE LA English DT Article ID BITE WOUNDS; PROTEINS; FLORA; DOG C1 NIH,NATL CTR RES RESOURCES,VET RESOURCES PROGRAM,SCI SERV BRANCH,LAB SCI SECT,BETHESDA,MD 20892. SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20001. RP WEYANT, RS (reprint author), CTR DIS CONTROL & PREVENT,NATL CTR INFECT DIS,DIV BACTERIAL & MYCOT DIS,ATLANTA,GA 30333, USA. NR 22 TC 5 Z9 5 U1 0 U2 1 PU AMER ASSOC LABORATORY ANIMAL SCIENCE PI CORDOVA PA 70 TIMBERCREEK DR, SUITE 5, CORDOVA, TN 38018 SN 0023-6764 J9 LAB ANIM SCI JI Lab. Anim. Sci. PD APR PY 1994 VL 44 IS 2 BP 180 EP 183 PG 4 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA NJ936 UT WOS:A1994NJ93600017 PM 8028284 ER PT J AU BARRETT, SJ SCHLATER, LK MONTALI, RJ SNEATH, PHA AF BARRETT, SJ SCHLATER, LK MONTALI, RJ SNEATH, PHA TI A NEW SPECIES OF NEISSERIA FROM IGUANID LIZARDS, NEISSERIA-IGUANAE SP-NOV SO LETTERS IN APPLIED MICROBIOLOGY LA English DT Article AB A new species of the genus Neisseria is proposed, Neisseria iguanae sp. nov. The organism is associated with septic lesions in the common iguana (Iguana iguana) and the rhinoceros iguana (Cyclura cornuta) but is also a commensal. It resembles N. animalis and N. canis phenotypically but is distinguished from these by exhibiting pronounced tetrad arrangement and alpha haemolysis and by fermenting gluconate. C1 UNIV LEICESTER,DEPT MICROBIOL,LEICESTER LE1 9HN,ENGLAND. USDA,NATL VET SERV LABS,VET SERV,ANIM & PLANT HLTH INSPECT SERV,AMES,IA 50010. SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20008. NR 13 TC 6 Z9 6 U1 0 U2 2 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0266-8254 J9 LETT APPL MICROBIOL JI Lett. Appl. Microbiol. PD APR PY 1994 VL 18 IS 4 BP 200 EP 202 DI 10.1111/j.1472-765X.1994.tb00846.x PG 3 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA NF735 UT WOS:A1994NF73500007 ER PT J AU RILEY, S AF RILEY, S TI THE GIRLS - KAGAN,E SO LIBRARY JOURNAL LA English DT Book Review RP RILEY, S (reprint author), SMITHSONIAN INST LIB,WASHINGTON,DC, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD APR 1 PY 1994 VL 119 IS 6 BP 132 EP 132 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA ND625 UT WOS:A1994ND62500222 ER PT J AU COATS, DW BOCKSTAHLER, KR BERG, GM SNIEZEK, JH AF COATS, DW BOCKSTAHLER, KR BERG, GM SNIEZEK, JH TI DINOFLAGELLATE INFECTIONS OF FAVELLA-PANAMENSIS FROM 2 NORTH-AMERICAN ESTUARIES SO MARINE BIOLOGY LA English DT Article ID ACARTIA-TONSA; PREDATION; PREY; MICROZOOPLANKTON; EHRENBERGII; ZOOPLANKTON; TINTINNINA; ECOLOGY; CILIATE; LARVAL AB Favella panamensis Kofoid and Campbell, 1929 is seasonally abundant in meso- to polyhaline waters of Chesapeake Bay and Indian River, Florida, USA, where it reaches densities of 10(3) cells 1(-1). During the summers of 1986-1992, F: panamensis populations of the two estuaries were commonly infected by the parasitic dinoflagellate Duboscquella aspida Cachon, 1964. The intracellular phase of the parasite reached maturity in similar to 21 h (30 degrees C) and consumed similar to 35% of the host's biomass. Infections were not typically lethal to F: panamensis, but sometimes forced the host from its lorica. Several D. aspida were found in the cytoplasm of many hosts, and the number of parasites infection(-1) was directly related to infection level. Parasite prevalence averaged 24.0 and 11.5% with mean number of parasites infection(-1) being 1.5 and 1.3 for Chesapeake Bay and Indian River samples, respectively. D. aspida was estimated to remove up to 68% of host standing stock d(-1) with a mean of similar to 10% for all samples. The average impact of parasitism on F: panamensis populations was somewhat less than would be expected from copepod grazing. C1 UNIV MARYLAND,COLLEGE PARK,MD 20742. RP COATS, DW (reprint author), SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037, USA. NR 39 TC 10 Z9 10 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0025-3162 J9 MAR BIOL JI Mar. Biol. PD APR PY 1994 VL 119 IS 1 BP 105 EP 113 DI 10.1007/BF00350112 PG 9 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA NK275 UT WOS:A1994NK27500013 ER PT J AU HAIG, SM BALLOU, JD CASNA, NJ AF HAIG, SM BALLOU, JD CASNA, NJ TI IDENTIFICATION OF KIN STRUCTURE AMONG GUAM RAIL FOUNDERS - A COMPARISON OF PEDIGREES AND DNA PROFILES SO MOLECULAR ECOLOGY LA English DT Article DE CONSERVATION GENETICS; DNA PROFILES; ENDANGERED SPECIES; GUAM RAILS; KIN FOUNDING; KIN STRUCTURE; PEDIGREE ANALYSES ID GENETIC-VARIATION; POPULATION; EXTINCTION; FINGERPRINTS; DIFFERENTIATION; COLONIZATION; RELATEDNESS; DROSOPHILA; EVOLUTION; DIVERSITY AB Kin structure among founders can have a significant effect on subsequent population structure. Here we use the correlation between DNA profile similarity and relatedness calculated from pedigrees to test hypotheses regarding kin structure among founders to the captive Guam rail (Rallus owstoni) population. Five different pedigrees were generated under the following hypotheses: (i) founders are unrelated; (ii) founders are unrelated except for same-nest chicks; (iii) founders from the same major site are siblings; (iv) founders from the same local site are siblings; and (v) founders are related as defined by a UPGMA cluster analysis of DNA similarity data. Relatedness values from pedigrees 1, 2 and 5 had the highest correlation with DNA similarity but the correlation between relatedness and similarity were not significantly different among pedigrees. Pedigree 5 resulted in the highest correlation overall when using only relatedness values that changed as a result of different founder hypotheses. Thus, founders were assigned relatedness based on pedigree 5 because it had the highest correlations with DNA similarity, was the most conservative approach, and incorporated all field data. The analyses indicated that estimating relatedness using DNA profiles remains problematic, therefore we compared mean kinship, a measure of genetic importance, with mean DNA profile similarity to determine if genetic importance among individuals could be determined via use of DNA profiles alone. The significant correlation suggests this method may provide more information about population structure than was previously thought. Thus, DNA profiles can provide a reasonable explanation for founder relatedness and mean DNA profile similarity may be helpful in determining relative genetic importance of individuals when detailed pedigrees are absent. C1 SMITHSONIAN INST, NATL ZOOL PK, DEPT ZOOL RES, WASHINGTON, DC 20008 USA. CLEMSON UNIV, NATL BIOL SURVEY, CLEMSON, SC 29634 USA. THERION CORP, TROY, NY 12180 USA. NR 56 TC 33 Z9 35 U1 0 U2 14 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0962-1083 EI 1365-294X J9 MOL ECOL JI Mol. Ecol. PD APR PY 1994 VL 3 IS 2 BP 109 EP 119 DI 10.1111/j.1365-294X.1994.tb00111.x PG 11 WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology; Evolutionary Biology GA NJ856 UT WOS:A1994NJ85600003 ER PT J AU VANPARADIJS, J CHARLES, PA HARLAFTIS, ET AREVALO, MJ BARUCH, JEF CALLANAN, PJ CASARES, J DHILLON, VS GIMENEZ, A GONZALEZ, R MARTINEZPAIS, IG JONES, DHP HASSALL, BJM HELLIER, C KIDGER, MR LAZARO, C MARSH, TR MASON, KO MUKAI, K NAYLOR, T REGLERO, V RUTTEN, RGM SMITH, RC AF VANPARADIJS, J CHARLES, PA HARLAFTIS, ET AREVALO, MJ BARUCH, JEF CALLANAN, PJ CASARES, J DHILLON, VS GIMENEZ, A GONZALEZ, R MARTINEZPAIS, IG JONES, DHP HASSALL, BJM HELLIER, C KIDGER, MR LAZARO, C MARSH, TR MASON, KO MUKAI, K NAYLOR, T REGLERO, V RUTTEN, RGM SMITH, RC TI A 60-NIGHT CAMPAIGN ON DWARF NOVAE .1. PHOTOMETRIC VARIABILITY OF SU UMA AND YZ CNC SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE BINARIES, ECLIPSING; STARS, INDIVIDUAL, YZ CNC; STARS, INDIVIDUAL, SU UMA; NOVAE, CATACLYSMIC VARIABLES ID HIGH-SPEED PHOTOMETRY; CATACLYSMIC VARIABLES; VW HYDRI; Z-CHA; ACCRETION DISK; WALRAVEN PHOTOMETRY; Z-CHAMAELEONTIS; URSAE-MAJORIS; OY-CARINAE; IP-PEGASI AB A 60-night campaign on SU UMa, YZ Cnc and some secondary targets was carried out during 1988 December and 1989 January at the Observatorio del Roque de Los Muchachos (the 1988 International Time Project). The aim was to study the behaviour of these dwarf novae through their outburst cycle. Here we present the overall light curves of the main targets, SU UMa and YZ Cnc, which show that the optical fluxes continue to decrease after the end of the outburst. For YZ Cnc we find that, during quiescence, orbital variability is present, which may be interpreted as modulation caused by the bright-spot region. Near the end of an outburst, a weak, sinusoidal variation is observed; we discuss the possibility that this arises either from the secondary star or the accretion disc. C1 DEPT PHYS, ASTROPHYS NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND. ROYAL GREENWICH OBSERV, E-38780 SANTA CRUZ PALMA, SPAIN. UNIV LA LAGUNA, INST ASTROFIS CANARIAS, E-38200 LA LAGUNA, SPAIN. UNIV BRADFORD, DEPT ELECT ENGN, BRADFORD BD7 1DP, W YORKSHIRE, ENGLAND. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. INST NACL TECN AEROSPATIAL, E-28080 MADRID, SPAIN. EUROPEAN SPACE AGCY, 14E OBSERV, E-28080 MADRID, SPAIN. ROYAL GREENWICH OBSERV, CAMBRIDGE CB3 0EZ, ENGLAND. UCL, MULLARD SPACE SCI LAB, DORKING RH5 6NT, SURREY, ENGLAND. NASA, GODDARD SPACE FLIGHT CTR, HIGH ENERGY ASTROPHYS LAB, GREENBELT, MD 20771 USA. UNIV KEELE, DEPT PHYS, KEELE ST5 5BG, STAFFS, ENGLAND. UNIV VALENCIA, DEPT MATEMAT APLICADO & ASTRON, E-46100 BURJASSOT, SPAIN. UNIV SUSSEX, CTR ASTRON, DIV PHYS & ASTRON, BRIGHTON BN1 9QH, E SUSSEX, ENGLAND. RP VANPARADIJS, J (reprint author), UNIV AMSTERDAM, INST ASTRON ANTON PANNEKOEK, NIKHEF-H, KRUISLAAN 403, 1098 SJ AMSTERDAM, NETHERLANDS. RI Naylor, Tim /A-9465-2015 NR 53 TC 15 Z9 15 U1 0 U2 0 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD APR 1 PY 1994 VL 267 IS 3 BP 465 EP 472 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA ND757 UT WOS:A1994ND75700002 ER PT J AU PERIVOLAROPOULOS, L AF PERIVOLAROPOULOS, L TI THE FOURIER-SPACE STATISTICS OF SEED-LIKE COSMOLOGICAL PERTURBATIONS SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMOLOGY, OBSERVATIONS; EARLY UNIVERSE; LARGE-SCALE STRUCTURE OF UNIVERSE ID COLD DARK MATTER; COSMIC STRINGS; DENSITY PERTURBATIONS; GLOBAL TEXTURE; UNIVERSE; FIELDS; WAKES AB We propose a new test for distinguishing observationally between cosmological models based on seed-like primordial perturbations (such as cosmic strings or textures) and models based on Gaussian fluctuations. We investigate analytically the Fourier-space statistical properties of temperature or density fluctuation patterns generated by seed-like objects and compare these properties with those of Gaussian fluctuations generated during inflation. We show that the proposed statistical test can easily identify temperature fluctuations produced by a superposition of a small number of seeds per horizon scale for any observational angular resolution and any seed geometry. Due to the central limit theorem, however, the distinction becomes more difficult as the number of seeds in the fluctuation pattern increases. RP PERIVOLAROPOULOS, L (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 31 TC 4 Z9 4 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD APR 1 PY 1994 VL 267 IS 3 BP 529 EP 534 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA ND757 UT WOS:A1994ND75700011 ER PT J AU SPRUCH, L BABB, JF ZHOU, F AF SPRUCH, L BABB, JF ZHOU, F TI SIMPLE DERIVATION OF THE ASYMPTOTIC CASIMIR INTERACTION OF A PAIR OF FINITE SYSTEMS SO PHYSICAL REVIEW A LA English DT Article ID LONG-RANGE POTENTIALS; HIGH RYDBERG STATES; RETARDATION; HELIUM; VACUUM AB Even if all constituents move slowly, the interaction between a pair of systems predicted by nonrelativistic theory can differ drastically at large separations of the systems from the true interaction, that which takes into account the finite speed of the virtual electromagnetic waves (generated by vacuum fluctuations) responsible for the interaction at large separations. We here adapt, improve, and generalize a rough physical picture presented previously, and arrive at exact results for the asymptotic interaction, V(r). One need use neither the Schrodinger equation nor the Dirac equation; all that need be known of either system is its electric-dipole polarizability. [For a neutral system, one needs the static scalar alpha(omega = 0) for a spherically symmetric system and the static tensor alpha(ij)(omega = 0) for a nonspherically symmetric system; the alpha(omega) for an electron is -e2/momega2.] Apart from its simplicity and the insights it leads to, the approach provides a uniform derivation for a number of known results, and one result not previously given, the asymptotic interaction of a distant electron and a cylindrically symmetric core, a Rydberg H-2 molecule and a Rydberg carbon atom, with their cores in their ground states, being prototypes. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP SPRUCH, L (reprint author), NYU,DEPT PHYS,NEW YORK,NY 10003, USA. OI Babb, James/0000-0002-3883-9501 NR 32 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN 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 APR PY 1994 VL 49 IS 4 BP 2476 EP 2482 DI 10.1103/PhysRevA.49.2476 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA NG485 UT WOS:A1994NG48500038 ER PT J AU KIMURA, M DALGARNO, A CHANTRANUPONG, L LI, Y HIRSCH, G BUENKER, RJ AF KIMURA, M DALGARNO, A CHANTRANUPONG, L LI, Y HIRSCH, G BUENKER, RJ TI NONRADIATIVE AND RADIATIVE ELECTRON-CAPTURE IN COLLISIONS OF HE+ IONS WITH C-ATOMS BELOW 1000 EV SO PHYSICAL REVIEW A LA English DT Article ID ENERGY EXTRAPOLATION; CONFIGURATION AB Nonradiative and radiative electron captures in collisions of He' ions with carbon atoms at energies below 1 keV are studied theoretically by using a molecular-orbital expansion method to calculate the adiabatic potential-energy curves and the nonadiabatic coupling matrix elements of CHe+. The corresponding scattering equations are solved. For nonradiative transitions, electron capture into channels separating to He+C+(2D) are found to be dominant below 10 eV. However, as the energy increases, the channels separating to He+C+(2P) take over because of the positive asymptotic energy defect. At 100 eV, the nonradiative capture cross section is 5 X 10(-17) cm2. The radiative electron-capture cross section is found to be very small, with a magnitude nowhere greater than 10(-22) cm2. C1 BERG UNIV GESAMTHSCH WUPPERTAL,D-42097 WUPPERTAL,GERMANY. ARGONNE NATL LAB,ARGONNE,IL 60439. RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. RP KIMURA, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 18 TC 5 Z9 5 U1 1 U2 4 PU AMERICAN 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 APR PY 1994 VL 49 IS 4 BP 2541 EP 2544 DI 10.1103/PhysRevA.49.2541 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA NG485 UT WOS:A1994NG48500046 ER PT J AU ZYGELMAN, B DALGARNO, A SHARMA, RD AF ZYGELMAN, B DALGARNO, A SHARMA, RD TI MOLECULAR THEORY OF COLLISION-INDUCED FINE-STRUCTURE TRANSITIONS IN ATOMIC OXYGEN SO PHYSICAL REVIEW A LA English DT Article ID STRUCTURE EXCITATION; LIMB EMISSION; HEAT-BUDGET; THERMOSPHERE; TEMPERATURE; FEASIBILITY; RETRIEVAL; HYDROGEN; IONS AB A molecular theory of collision-induced fine-structure-level transitions in complex atoms is presented. The theory is applied to calculate the excitation cross sections for the fine-structure levels in the P3 ground state of atomic oxygen. We discuss and compare the theory presented here with previous molecular theories. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. PHILLIPS LAB,DIV OPT ENVIRONM,LEXINGTON,MA 01731. RP ZYGELMAN, B (reprint author), UNIV NEVADA,DEPT PHYS,LAS VEGAS,NV 89154, USA. NR 34 TC 27 Z9 27 U1 0 U2 7 PU AMERICAN 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 APR PY 1994 VL 49 IS 4 BP 2587 EP 2606 DI 10.1103/PhysRevA.49.2587 PG 20 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA NG485 UT WOS:A1994NG48500053 ER PT J AU MARINESCU, M FLORESCU, V DALGARNO, A AF MARINESCU, M FLORESCU, V DALGARNO, A TI 2-PHOTON EXCITATION OF THE 5 (2)D STATES OF RUBIDIUM SO PHYSICAL REVIEW A LA English DT Article AB We calculate the excitation rates of the 5(2)D3/2 and 5(2)D5/2 States of rubidium through the simultaneous absorption of two photons of different frequencies by the ground 5(2)S1/2 state. We include spin-orbit effects in the contribution of the 5P and 6P states, situated between the initial and final states, which give rise to the resonance structure in the two-photon spectrum. We indicate how our results can be used for the case in which the transition takes place between states with specified total angular momenta F, for both Rb-85 and Rb-87. For the case of counterpropagating photons with the same frequency, our results are compared with existing experimental data. RP MARINESCU, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 7 TC 3 Z9 3 U1 1 U2 5 PU AMERICAN 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 APR PY 1994 VL 49 IS 4 BP 2714 EP 2718 DI 10.1103/PhysRevA.49.2714 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA NG485 UT WOS:A1994NG48500066 ER PT J AU KROMBEIN, KV AF KROMBEIN, KV TI A NEW ANACHRYSIS FROM SOUTH-AFRICA (HYMENOPTERA, CHRYSIDIDAE, AMISEGINAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE CHRYSIDIDAE; AMISEGINAE; WASP; ANACHRYSIS; NEW SPECIES AB Anachrysis spanglerorum Krombein, n. sp., is described from a male from Warmbad, Transvaal, South Africa, and differentiated from the male of A. paradoxa Krombein, the only other species in the genus. The tentative sex association in A. paradoxa is confirmed. RP KROMBEIN, KV (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 2 U1 0 U2 1 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD APR PY 1994 VL 96 IS 2 BP 339 EP 341 PG 3 WC Entomology SC Entomology GA NL977 UT WOS:A1994NL97700016 ER PT J AU NORDEN, BB KROMBEIN, KV BATRA, SWT AF NORDEN, BB KROMBEIN, KV BATRA, SWT TI NESTS AND ENEMIES OF EXOMALOPSIS (PHANAMALOPSIS) SOLANI COCKERELL (HYMENOPTERA, APOIDEA, MUTILLIDAE, DIPTERA, ASILIDAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE COMMUNAL; CLEPTOPARASITE; GROUND-NESTING; EXOMALOPSIS; APOIDEA; ASILIDAE; MULTILLIDAE AB The bee, Exomalopsis (Phanomalopsis) solani Cockerell was studied in Apache, Arizona, 1988 and in Rodeo, New Mexico, 1991. Bees nested communally in hard packed, horizontal ground surrounded by low xeric vegetation. Nest structure, provisions, and larvae are discussed. Evidence of cooperative nesting without differentiation into castes is examined. Cleptoparasites of immatures, Pseudomethoca bethae Krombein (Mutillidae) and Nomada gutierreziae Cockerell (Apoidea), and a predator of adult bees, Mallophorina pulchra Pritchard (Asilidae), are identified. RP NORDEN, BB (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,WASHINGTON,DC 20560, USA. NR 0 TC 3 Z9 3 U1 1 U2 1 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD APR PY 1994 VL 96 IS 2 BP 350 EP 356 PG 7 WC Entomology SC Entomology GA NL977 UT WOS:A1994NL97700018 ER PT J AU GOMEZ, Y RODRIGUEZ, LF CONTRERAS, ME MORAN, JM AF GOMEZ, Y RODRIGUEZ, LF CONTRERAS, ME MORAN, JM TI ANOMALOUS WATER MASERS IN OH/IR STARS SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE CIRCUMSTELLAR MATTER; MASERS; STARS; INDIVIDUAL (OH12.8-0.9, OH37.1-0.8, OH42.3-0.1); STARS; LATE; TYPE ID OH-IR STARS; THERMAL SIO EMISSION; CIRCUMSTELLAR ENVELOPES; EVOLVED STARS; COOL STARS; H2O; SAGITTARIUS; POSITIONS AB We present OH (1612 MHz) and H2O (22.2 GHz) maser observations made with the VLA at an angular resolution of approximately 1'' toward three OH/IR stars: OH 12.8-0.9, OH37.1-0.8 and OH42.3-0.1. These stars exhibit the H2O maser components in a velocity range that exceeds the OH velocity range, a situation in disagreement with the standard model for maser emission in late-type stars. We find that the OH and H2O maser positions agree within approximately 0.5'' and that most likely both masers arise from the same source, ruling out the possibility of a fortuitous superposition of two different sources. We discuss some of the possible mechanisms that could explain the anomalous H2O maser emission. The most likely explanation is that these stars have axisymmetric winds and that the H2O emission originates in the polar regions with larger velocities than the regions closer to the equator where the OH emission arises. Very long baseline observations are required to test this explanation. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP GOMEZ, Y (reprint author), Univ Nacl Autonoma Mexico, INST ASTRON, APARTADO POSTAL 70-264, MEXICO CITY 04510, DF, MEXICO. NR 28 TC 22 Z9 22 U1 0 U2 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTR JI Rev. Mex. Astron. Astrofis. PD APR PY 1994 VL 28 IS 1 BP 97 EP 102 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NG525 UT WOS:A1994NG52500008 ER PT J AU ADAMS, RM AF ADAMS, RM TI THE SIGNIFICANCE OF FIELD-RESEARCH AT THE SMITHSONIAN SO SMITHSONIAN LA English DT Editorial Material RP ADAMS, RM (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SMITHSONIAN ASSOCIATES PI WASHINGTON PA 900 JEFFERSON DRIVE, WASHINGTON, DC 20560 SN 0037-7333 J9 SMITHSONIAN JI Smithsonian PD APR PY 1994 VL 25 IS 1 BP 8 EP 8 PG 1 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA ND075 UT WOS:A1994ND07500001 ER PT J AU PARNELL, CE PRIEST, ER GOLUB, L AF PARNELL, CE PRIEST, ER GOLUB, L TI THE 3-DIMENSIONAL STRUCTURES OF X-RAY BRIGHT POINTS SO SOLAR PHYSICS LA English DT Article ID EMERGING MAGNETIC-FLUX; RECONNECTION; TELESCOPE; YOHKOH AB Recently, the Converging Flux Model has been proposed for X-ray bright points and cancelling magnetic features. The aim of this peice of work is to try and model theoretically specific X-ray bright points in the framework of the Converging Flux Model. The observational data used includes a magnetogram showing the normal component of the magnetic field at the photosphere and a high-resolution soft X-ray image from NIXT showing the brightenings in the lower solar.corona. By approximating the flux concentrations in the magnetograms with poles of the appropriate sign and sense, the overlying three-dimensional potential field structure is calculated. Deduction of plausible motions of the flux sources are made which produce brightenings of the observed shape due to reconnection between neighbouring flux regions. Also the three-dimensional separatrix and separator structure and the way the magnetic field lines reconnect in three dimensions is deduced. C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02188. RP PARNELL, CE (reprint author), UNIV ST ANDREWS,DEPT MATH & COMPUTAT SCI,ST ANDREWS KY16 9SS,SCOTLAND. OI Golub, Leon/0000-0001-9638-3082 NR 19 TC 81 Z9 81 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD APR PY 1994 VL 151 IS 1 BP 57 EP 74 DI 10.1007/BF00654082 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NL584 UT WOS:A1994NL58400006 ER PT J AU WALLE, AH AF WALLE, AH TI THEORETIC VERSUS APPLIED FOLKLORE - APPLES VERSUS ORANGES SO WESTERN FOLKLORE LA English DT Article RP WALLE, AH (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 3 TC 1 Z9 1 U1 0 U2 1 PU CALIF FOLKLORE SOC PI POMONA PA WESTERN FOLKLORE DEPT OF ENGL/FOREIGN LANGUAGES 3801 W.TEMPLE AVENUE, POMONA, CA 91768-4010 SN 0043-373X J9 WESTERN FOLKLORE JI West. Folk. PD APR PY 1994 VL 53 IS 2 BP 171 EP 178 DI 10.2307/1500102 PG 8 WC Folklore SC Arts & Humanities - Other Topics GA NX202 UT WOS:A1994NX20200004 ER PT J AU THIELEMANN, FK KRATZ, KL PFEIFFER, B RAUSCHER, T VANWORMER, L WIESCHER, MC AF THIELEMANN, FK KRATZ, KL PFEIFFER, B RAUSCHER, T VANWORMER, L WIESCHER, MC TI ASTROPHYSICS AND NUCLEI FAR FROM STABILITY SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT International Symposium on Nuclear Structure Physics Today CY MAY 11-15, 1993 CL CHUNG YUAN CHRISTIAN UNIV, CHUNGLI, TAIWAN SP CHUNG YUAN CHRISTIAN UNIV HO CHUNG YUAN CHRISTIAN UNIV ID R-PROCESS; NEUTRON-STARS; NUCLEOSYNTHESIS; ABUNDANCES AB We discuss unstable nuclei on the proton-rich and neutron rich side of stability and their properties of astrophysical relevance. The Coulomb barriers in charged-particle captures lead to a cycle pattern which is not existent in neutron-induced reaction processes. They also assure that capture and decay time scales are of similar size. Neutron capture and photodisintegration time scales, on the other hand, are much shorter than beta-decays for high temperatures and neutron densities. Thus, the mechanisms of explosive hydrogen burning or rapid proton capture (rp-process) and rapid neutron capture (r-process) axe not fully symmetric in nature. We highlight key features of nuclear reaction patterns, mass and decay properties, which can be used to describe the resulting energy generation and abundances with high precision. C1 UNIV MAINZ,INST KERNCHEM,D-55099 MAINZ,GERMANY. HIRAM COLL,DEPT PHYS,HIRAM,OH 44234. UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. RP THIELEMANN, FK (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Rauscher, Thomas/D-2086-2009 OI Rauscher, Thomas/0000-0002-1266-0642 NR 43 TC 40 Z9 40 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 28 PY 1994 VL 570 IS 1-2 BP C329 EP C343 PG 15 WC Physics, Nuclear SC Physics GA NG648 UT WOS:A1994NG64800037 ER PT J AU BREEN, J RAYCHAUDHURY, S FORMAN, W JONES, C AF BREEN, J RAYCHAUDHURY, S FORMAN, W JONES, C TI EINSTEIN X-RAY OBSERVATIONS OF THE CORE OF THE SHAPLEY SUPERCLUSTER IN NORTHERN CENTAURUS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; X-RAYS, GALAXIES ID RICH CLUSTERS; GREAT ATTRACTOR; HYDRA-CENTAURUS; GALAXIES; CATALOG; ORIGIN AB We present Einstein X-ray observations of the core of the Shapley Supercluster, one of the richest and densest known mass concentrations in the local (z < 0.1) universe. We used Imaging Proportional Counter (IPC) observations supplemented with data from the Einstein Slew Survey to determine the locations and structure of mass concentrations in the region. An X-ray map composed of IPC observations of the central (10-degrees x 10-degrees) region of the Shapley Supercluster is presented. We present evidence that the X-ray clusters observed within 5-degrees of the core of the supercluster are on average brighter than those of corresponding richness class distributed throughout the sky. However, we measure no significant difference in the galaxy formation efficiency of these clusters of galaxies compared to other, more isolated clusters. We also find one previously uncataloged cluster-sized mass concentration in the core of the Shapley Supercluster. This new cluster, ''SC 1327 - 312'', is relatively X-ray bright (F(x) = 1.1 +/- 0.2 x 10(-11) erg s-1 cm-2 and L(x) = 1.1 +/- 0.2 x 10(44) ergs s-1 within 10', assuming z = 0.0477, H-0 = 50, q0 = 0). As SC 1327-312 lies well within an Abell radius of the richness R = 4 cluster Shapley 8 (A3558), we suggest it may contribute to an artificially high galaxy count and richness classification for Shapley 8. From slew data, we estimate an X-ray luminosity for Shapley 8 which is just half the mean luminosity of the four other R = 4 clusters observed by the IPC, further suggesting the richness classification to be an overestimate. RP BREEN, J (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 37 TC 32 Z9 32 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1994 VL 424 IS 1 BP 59 EP 67 DI 10.1086/173871 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA499 UT WOS:A1994NA49900005 ER PT J AU HARDEE, PE COOPER, MA CLARKE, DA AF HARDEE, PE COOPER, MA CLARKE, DA TI ON JET RESPONSE TO A DRIVING FREQUENCY AND THE JETS IN 3C-449 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (3C 449); GALAXIES, JETS; HYDRODYNAMICS; METHODS, NUMERICAL ID SPATIAL STABILITY; RADIO GALAXY; ATMOSPHERIC GRADIENTS; NUMERICAL SIMULATIONS; MAGNETIC-FIELD; EXPANDING JETS; SLAB JET; NGC 315; INSTABILITY; 3C449 AB Hydrodynamical simulations of the response of an expanding slab jet to different driving frequencies have been performed. Amplitude growth of the resulting sinusoidal jet oscillation occurs when the driving frequency is lower than the resonant frequency at which sinusoidal wave growth associated with the Kelvin-Helmholtz instability is a maximum. In general, conditions leading to jet expansion result in the driving frequency being above the resonant frequency at some point along an expanding jet. At larger distances where the driving frequency is above the resonant frequency, growth ceases. If by this point sufficient amplitude growth of sinusoidal oscillations has not occurred, the jet is not decollimated. A consequence for astrophysical jets is that observed large-scale jet oscillation can be at wavelengths longer than to slightly less than the wavelength corresponding to the jet's lowest resonant frequency. This places an upper limit on a precessional frequency, orbital frequency, or random perturbation frequency at the central engine to which an astrophysical jet can helically respond at large scales. This result is applied to the radio source 3C 449 whose morphology suggests that orbital motion of the central engine is responsible for jet bending and an upper limit to the orbital frequency is obtained. Additionally, the observed trajectory of the southern jet along with information about the galaxy's atmosphere is used to estimate the orbital period and jet velocity. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP HARDEE, PE (reprint author), UNIV ALABAMA,DEPT PHYS & ASTRON,TUSCALOOSA,AL 35487, USA. NR 35 TC 39 Z9 39 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1994 VL 424 IS 1 BP 126 EP 137 DI 10.1086/173877 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA499 UT WOS:A1994NA49900011 ER PT J AU MAUCHE, CW RAYMOND, JC BUCKLEY, DAH MOUCHET, M BONNELL, J SULLIVAN, DJ BONNETBIDAUD, JM BUNK, WH AF MAUCHE, CW RAYMOND, JC BUCKLEY, DAH MOUCHET, M BONNELL, J SULLIVAN, DJ BONNETBIDAUD, JM BUNK, WH TI OPTICAL, IUE, AND ROSAT OBSERVATIONS OF THE ECLIPSING NOVA-LIKE VARIABLE V347 PUPPIS (LB-1800) SO ASTROPHYSICAL JOURNAL LA English DT Article ID HIGH-VELOCITY WINDS; UX-URSAE-MAJORIS; X-RAY-EMISSION; T-TAURI STARS; DWARF NOVA; ACCRETION DISKS; CATACLYSMIC VARIABLES; SS-CYGNI; UV SPECTROSCOPY; Z CHAMAELEONTIS AB Using time-resolved optical spectroscopy and UBYRI and high-speed photometry obtained at Mount Stromlo Observatory, Mount John University Observatory, and the South African Astronomical Observatory; IUE ultraviolet spectroscopy; and ROSAT survey X-ray fluxes, we present a study of the accretion disk, hot spot, and emission line regions in the bright eclipsing nova-like variable V347 Pup (LB 1800). In the optical and UV, V347 Pup is a strong emission line source with a continuum spectrum which is remarkably red for a high-M cataclysmic variable. Consistent with its high inclination, we interpret the continuum spectrum as the superposition of the spectrum of the cool (T(eff) almost-equal-to 7000 K) outer edge and the hot (T(eff) almost-equal-to 100,000 K) inner regions of a self-eclipsed accretion disk. For the assumed parameters, the model matches the level and shape of the observed spectrum for an inclination of almost-equal-to 88-degrees and a distance of almost-equal-to 300 pc. The prominent hump in the optical and UV light curves just before eclipse manifests the presence of the hot spot where the accretion stream strikes the edge of the disk. The wavelength dependence of the amplitude of the hump is best modeled by a spot having an effective temperature of almost-equal-to 25,000 K and an area of almost-equal-to 3 x 10(18) cm2 if the spot radiates like a blackbody, or an effective temperature of almost-equal-to 14,000 K and an area of almost-equal-to 3 x 10(19) cm2 if it radiates with a stellar spectrum. In either case, the hot spot produces only one-tenth of the predicted luminosity for the assumed mass-transfer rate of 10(-8) M, yr-1. Either the hot spot is ''buried'' in the edge of the accretion disk, or a significant fraction of its luminosity is radiated away in lines. The difference in azimuth between the peak of the hump and the dynamically expected location of the hot spot suggests that the spot's emitting surface is rotated forward by almost-equal-to 36-degrees relative to the edge of the disk. Phase-resolved optical spectroscopy demonstrates that the optical continuum and emission line regions in V347 Pup have the same radial extent, that the bulk of the Hbeta emission line arises in the accretion disk but that it may also have a modest vertical extent, that the He II lambda4686 emission volume is both more sharply defined in the radial coordinate and less extended in the vertical direction, and that both the Hbeta and He II lambda4686 lines become narrower in eclipse, consistent with the eclipse of the inner, higher velocity, disk regions. In contrast, phase-resolved IUE spectroscopy demonstrates that the UV emission lines are only partially occulted in eclipse, indicating that they are formed in a region with dimensions comparable to the size of the secondary. Furthermore, the UV emission lines narrow only slightly in eclipse and have radial velocities which are delayed in phase relative to the optical emission lines by approximately 0.1 orbital cycles. The UV lines are modeled (poorly) by resonant scattering of accretion disk photons in a radially expanding wind emanating from the center of the disk. The required long acceleration scale and high wind mass-loss rate, combined with the prediction that the line widths should increase rather than decrease in eclipse, suggest that more complicated wind geometries may be necessary to explain the observed properties of the UV emission lines, including a possible rotational component near the disk plane and an additional emission component from the location of the hot spot. Finally, ROSAT survey observations indicate that V347 Pup is a weak and moderately soft X-ray source. Because of its high inclination, we argue that the X-rays do not come directly from the boundary layer but instead come from an extended emission volume. Possible sources of this emission include soft X-rays produced by shocks in the high-velocity wind and soft boundary layer X-rays which are scattered by the wind into the line of sight. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. S AFRICAN ASTRON OBSERV,CAPE TOWN 7935,SOUTH AFRICA. OBSERV PARIS,DAEC,SECT MEUDON,F-92195 MEUDON,FRANCE. UNIV PARIS 07,F-75251 PARIS 05,FRANCE. NASA,GODDARD SPACE FLIGHT CTR,GSFC,GRO SCI SUPPORT CTR,GREENBELT,MD 20771. VICTORIA UNIV WELLINGTON,DEPT PHYS,WELLINGTON,NEW ZEALAND. CENS,DAPNIA SAP,SERV ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. MAX PLANCK INST EXTRATERR PHYS,W-8046 GARCHING,GERMANY. RP MAUCHE, CW (reprint author), LAWRENCE LIVERMORE NATL LAB,EXPTL ASTROPHYS LAB,L-401,POB 808,LIVERMORE,CA 94550, USA. NR 77 TC 25 Z9 25 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1994 VL 424 IS 1 BP 347 EP 369 DI 10.1086/173894 PN 1 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA499 UT WOS:A1994NA49900028 ER PT J AU DACOSTA, LN GELLER, MJ PELLEGRINI, PS LATHAM, DW FAIRALL, AP MARZKE, RO WILLMER, CNA HUCHRA, JP CALDERON, JH RAMELLA, M KURTZ, MJ AF DACOSTA, LN GELLER, MJ PELLEGRINI, PS LATHAM, DW FAIRALL, AP MARZKE, RO WILLMER, CNA HUCHRA, JP CALDERON, JH RAMELLA, M KURTZ, MJ TI A COMPLETE SOUTHERN SKY REDSHIFT SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS; GALAXIES, LUMINOSITY FUNCTION, MASS FUNCTION; LARGE-SCALE STRUCTURE OF UNIVERSE ID LUMINOSITY FUNCTION; GALAXIES; CATALOG; FIELD; SAMPLE AB We discuss a magnitude-limited redshift survey covering a region around the south Galactic pole (SSRS2). The survey includes 3592 galaxies and covers a region of 1.13 sr to a limiting m(B(0)) = 15.5, directly comparable to CfA2. Together, CfA2 and SSR2 cover more than a third of the sky. The northern and southern surveys are remarkably similar. Both contain voids with diameters as large as 5000 km s-1. The southern survey contains the Southern Wall, similar to the northern Great Wall. The distributions of velocity dispersions for systems extracted from the SSRS2 and CfA2 surveys are also remarkably similar. For the SSRS2, an inhomogeneity-independent technique yields Schechter luminosity function parameters M* = -19.50 and alpha = -1.20 (H0 = 100 h km s-1 Mpc-1; h = 1 unless otherwise specified). The steep faintend slope is probably attributable to bluer galaxies. By examining the normalized density fluctuations in the SSRS2 and CfA2 surveys, we suggest that the combined sample is not yet large enough to be ''fair.'' There are large fluctuations in shells at 10,000 km s-1. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CAPE TOWN,RONDEBOSCH 7700,SOUTH AFRICA. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. OBSERV ASTRON,RA-5000 CORDOBA,ARGENTINA. RP DACOSTA, LN (reprint author), CNPQ,OBSERV NACL,DEPT ASTRON,RUA GEN JOSE CRISTINO 77,BR-20921 RIO JANEIRO,BRAZIL. RI KURTZ, Michael /B-3890-2009 NR 28 TC 183 Z9 183 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1994 VL 424 IS 1 BP L1 EP L4 DI 10.1086/187260 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA500 UT WOS:A1994NA50000001 ER PT J AU MARCAIDE, JM ALBERDI, A ELOSEGUI, P GUIRADO, JC MANTOVANI, F PEREZ, E RATNER, MI RIUS, A ROGERS, AEE SCHMIDT, BP SHAPIRO, II WHITNEY, AR AF MARCAIDE, JM ALBERDI, A ELOSEGUI, P GUIRADO, JC MANTOVANI, F PEREZ, E RATNER, MI RIUS, A ROGERS, AEE SCHMIDT, BP SHAPIRO, II WHITNEY, AR TI RADIO-SIZE ESTIMATES OF SN 1993J SO ASTROPHYSICAL JOURNAL LA English DT Article ID INTERFEROMETRY; SUPERNOVAE AB Supernova 1993J (SN 1993J) in M81, now classified as Type IIb, is a strongly emitting radio supernova whose size can be resolved and whose growth can be monitored with the technique of very long baseline interferometry (VLBI). The results could provide important information about the circumstellar matter and the degree of asymmetry of the explosion. For several models of the emission of the radio supernova, we report estimates of its angular sizes 29 and 36 days after explosion at the wavelengths of 3.6 and 1.3 cm, respectively. These results, which correspond to our first epochs in an ongoing effort to determine the supernova structure and its growth, slightly favor an optically thick uniform disk model, given the recently derived Cepheid distance to M81 and the estimated maximum supernova expansion speed. Further VLBI observations, combined with the expansion-speed data, may yield an independent estimate of the distance to M81. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. IST RADIOASTRON,I-40129 BOLOGNA,ITALY. INST ASTROFIS CANARIAS,E-38200 LA LAGUNA,SPAIN. CSIC,INST ASTRON & GEODESIA,E-38200 LA LAGUNA,SPAIN. MIT,HAYSTACK OBSERV,WESTFORD,MA 01886. RP MARCAIDE, JM (reprint author), UNIV VALENCIA,DEPT ASTRON,E-46100 BURJASSOT,SPAIN. RI Antonio, Rius/A-4873-2012; OI Antonio, Rius/0000-0002-5947-2649; Schmidt, Brian/0000-0001-6589-1287; Schmidt, Brian/0000-0002-8538-9195 NR 27 TC 23 Z9 23 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1994 VL 424 IS 1 BP L25 EP L27 DI 10.1086/187266 PN 2 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA500 UT WOS:A1994NA50000007 ER PT J AU CAMERON, AGW AF CAMERON, AGW TI GAMMA-RAY ASTRONOMY - COSMIC-RAY HOTSPOTS SO NATURE LA English DT Editorial Material RP CAMERON, AGW (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 7 TC 10 Z9 10 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 17 PY 1994 VL 368 IS 6468 BP 192 EP 192 DI 10.1038/368192a0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA NA870 UT WOS:A1994NA87000031 ER PT J AU MCLAUGHLIN, BM BELL, KL AF MCLAUGHLIN, BM BELL, KL TI EFFECTIVE COLLISION STRENGTHS FOR INTERMULTIPLET 2S2P(4) TO 2S(2)2P(2)3S, AND 2S(2)2P(3) AND 2S(2)2P(2)3S TO 2S(2)2P(2)3S OPTICALLY FORBIDDEN TRANSITIONS OF O-II SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE ATOMIC PROCESSES; LINE, FORMATION; PLASMAS; STARS, GENERAL; PLANETARY NEBULAE, GENERAL ID OPACITY CALCULATIONS; PLANETARY-NEBULAE; ATOMIC DATA AB Accurate data are provided for the first time on electron collisional excitation of the O II ion from the 1s(2)2s2p4 P-2(e), P-4(e), 2D(e) P-2(e) and S-2(e) States to the n = 3 terms, namely, the 1s(2)2s(2)2p(2)3s2, P-2(e), P-4(e) 2D(e), P-2(e) and S-2(e) states; from the 1s(2)2s(2)2p3 S-4(0), 2D0 and P-2(0) states to the 1s(2)2s(2)2p23s P-2(e), P-4(e) 2D(e) P-2(e) and S-2(e) states; and for selected 1s(2)2s(2)2p(2)3s intermultiplet transitions. The electron collisional excitation strengths OMEGA, from an 11-state R-matrix calculation performed in LS coupling, are convoluted with a Maxwellian velocity distribution to obtain effective collision strengths UPSILON for a range of temperatures from 5000 to 1O(6) K. C1 QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. RP MCLAUGHLIN, BM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 20 TC 7 Z9 7 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAR 15 PY 1994 VL 267 IS 2 BP 231 EP 234 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA184 UT WOS:A1994NA18400004 ER PT J AU COFFEY, WT CROTHERS, DSF WALDRON, JT AF COFFEY, WT CROTHERS, DSF WALDRON, JT TI INTEGRAL-REPRESENTATION OF EXACT-SOLUTIONS FOR THE CORRELATION TIMES OF ROTATORS IN PERIODIC POTENTIALS - DERIVATION OF ASYMPTOTIC EXPANSIONS SO PHYSICA A LA English DT Article ID RELAXATION-TIME; MAGNETIZATION AB The derivation of asymptotic expansions from the exact solution of the three term recurrence relations arising in the study of the Brownian movement in a periodic potential is discussed. The discussion is illustrated by showing how the exact formulae for the longitudinal and transverse correlation times of a single axis rotator with two equivalent sites, which have been previously given as a series of products of modified Bessel functions, may be rendered in integral form using Watson's integral formula for the product of two modified Bessel functions. The method of steepest descents is applied to these solutions in order to obtain rigourous asymptotic formulae for the correlation times in the high potential barrier limit. The analogous results for rotation in three dimensions in the Maier-Saupe potential are treated briefly. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. DUBLIN CITY UNIV,SCH COMP APPLICAT,DUBLIN 9,IRELAND. QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,DIV THEORET & COMPUTAT PHYS RES,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. RP COFFEY, WT (reprint author), UNIV DUBLIN TRINITY COLL,DEPT MICROELECTR & ELECTR ENGN,DUBLIN 2,IRELAND. NR 33 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD MAR 15 PY 1994 VL 203 IS 3-4 BP 600 EP 626 DI 10.1016/0378-4371(94)90017-5 PG 27 WC Physics, Multidisciplinary SC Physics GA ND101 UT WOS:A1994ND10100016 ER PT J AU PRESS, WH AF PRESS, WH TI WRINKLES IN TIME. - SMOOT,G, DAVIDSON,K SO SCIENCE LA English DT Book Review RP PRESS, WH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 1 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 11 PY 1994 VL 263 IS 5152 BP 1455 EP 1456 DI 10.1126/science.263.5152.1455 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MZ927 UT WOS:A1994MZ92700038 PM 17776515 ER PT J AU PRESS, WH AF PRESS, WH TI RIPPLES IN THE COSMOS - A VIEW BEHIND THE SCENES OF THE NEW COSMOLOGY. - ROWANROBINSON,M SO SCIENCE LA English DT Book Review RP PRESS, WH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 1 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 11 PY 1994 VL 263 IS 5152 BP 1455 EP 1456 DI 10.1126/science.263.5152.1455 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MZ927 UT WOS:A1994MZ92700039 PM 17776515 ER PT J AU FERRARA, A FIELD, GB AF FERRARA, A FIELD, GB TI ON THE DISTANCE DETERMINATION AND IONIZATION OF THE HIGH-VELOCITY CLOUDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, HALO; ISM, CLOUDS; RADIO LINES, ISM; SHOCK WAVES ID H-ALPHA EMISSION; HYDROSTATIC EQUILIBRIUM; INTERSTELLAR ABSORPTION; SPHERICAL CLOUDS; HIGH-RESOLUTION; HOT COMPONENT; GALACTIC HALO; DISK; GAS; EVAPORATION AB We present a study of the ionization and thermal structure of neutral hydrogen clouds located in the Galactic halo, immersed in the extragalactic background radiation field, and supposed to be in pressure equilibrium with the surrounding (presumably) hot medium. The problem is solved numerically, but an useful analytical approximation has been derived as well. We discuss the two main parameters of the problem, i.e., the radiation field and the halo pressure, in the framework of the current models for the halo/disk interaction. We find a well defined relation between a critical column density at which the cloud starts to develop a cold central core with the cloud linear size. Making use of this relation, we suggest a straightforward method to derive the distance to the cloud. We discuss the possible sources of error in this determination and it is found that the method is particularly suitable for those clouds which are subsonic with respect to the surrounding medium, while for the supersonic ones, the method can only give a lower limit to the distance. The Halpha emission from the partially ionized edge of the cloud is calculated and compared with the available observations; this measure is a powerful indicator of the possible presence of a shock in the cloud. C1 OSSERV ASTROFIS ARCETRI, I-50125 FLORENCE, ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP FERRARA, A (reprint author), SPACE TELESCOPE SCI INST, 3700 SAN MARTIN DR, BALTIMORE, MD 21218 USA. NR 75 TC 42 Z9 42 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1994 VL 423 IS 2 BP 665 EP 673 DI 10.1086/173845 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA095 UT WOS:A1994NA09500015 ER PT J AU GREEN, PJ MARGON, B AF GREEN, PJ MARGON, B TI CONSTRAINTS ON THE ORIGIN OF DWARF CARBON STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, SPECTROSCOPIC; STARS, ABUNDANCES; STARS, CARBON; STARS, EVOLUTION ID CH STARS; CHEMICAL-COMPOSITION; STELLAR OBJECTS; ISOTOPE RATIOS; SPECTROSCOPY; BARIUM; CONNECTION; DISPERSION; VARIABLES; GIANTS AB As main-sequence stars do not produce carbon, the newly recognized class of carbon-rich dwarf (dC) stars is most easily explained if dC's are main-sequence bystanders polluted by mass transfer from a giant companion that has since become a white dwarf. We analyze intermediate (almost-equal-to 2 angstrom) resolution spectra of six dC's to constrain their radial velocities and abundances and to place them in context with other known or suspected mass-transfer binary (MTB) systems. We find that barium is enhanced in all dC's observed. Carbon isotope ratios appear to span a wide range in our sample, with C-13 often as strong as in the C-13-rich '' J '' stars. Both these abundance patterns are reminiscent of the CH stars, which are now accepted to be MTB systems. Wihin our velocity resolution, we find no evidence for radial velocity (RV) variability. This is consistent with the RV variations observed in wide binary systems like CH stars, but not with close post-common-envelope white dwarf + red dwarf systems. We suggest that dC's are the main-sequence progenitors of CH giants and/or that CH giants are the high-luminosity tail in a distribution of MTB systems numerically dominated by dC's. Two recently discovered composite-spectrum DA/dC systems are also examined. The brighter DA/dC, PG 0824 + 289, has shown evidence for variable Balmer line emission, but has a previously unresolved close neighbor. We find that the neighbor is an unrelated M dwarf, so that the emission must arise from the DA/dC system. We examine two possible causes of the emission-chromospheric activity intrinsic to the dC, or reprocessing in a close binary of the DA's UV flux on the dC atmosphere. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV WASHINGTON,DEPT ASTRON,SEATTLE,WA 98195. RI Margon, Bruce/B-5913-2012 NR 44 TC 32 Z9 32 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1994 VL 423 IS 2 BP 723 EP 732 DI 10.1086/173851 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA095 UT WOS:A1994NA09500021 ER PT J AU WIEDEMANN, G AYRES, TR JENNINGS, DE SAAR, SH AF WIEDEMANN, G AYRES, TR JENNINGS, DE SAAR, SH TI CARBON-MONOXIDE FUNDAMENTAL BANDS IN LATE-TYPE STARS .3. CHROMOSPHERE OR CO-MOSPHERE SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, STARS; LINE, FORMATION; STARS, CHROMOSPHERES; STARS, LATE-TYPE ID TRANSFORM SPECTROMETER OBSERVATIONS; STELLAR MODEL CHROMOSPHERES; GIANT STARS; OXYGEN ABUNDANCES; QUIET SUN; ARCTURUS; TEMPERATURE; ATMOSPHERE; NITROGEN; SPECTRA AB The strong vibration-rotation lines of CO at 4.6 mum (DELTAv = 1) are unique diagnostics for the thermal conditions in the atmospheric altitude range of late-type stars near and above the temperature minimum in chromospheric models. Exploiting recent improvements in IR instrumentation, we observed a number of cool stars with high spectral resolution (R almost-equal-to 100,000). The analysis of the spectra was based on an earlier theoretical study which had established CO DELTAv = 1 non-LTE spectra as useful probes for stars of spectral type F, G, and K with log g greater-than-or-equal-to 1. No direct chromospheric indicators were detected in the CO spectra. Stellar boundary (CO) temperatures were determined for the program stars and temperature profiles were constructed for alpha Tau, alpha Boo, beta Gem and beta Dra. The CO-based models feature a steady decrease in temperature at the height where the temperature increases in chromospheric models. Further comparison with chromospheric indicators shows an increasing discrepancy between the temperatures determined from CO measurements and those predicted from radiative equilibrium models, respectively, with increasing chromospheric activity. Thermal bifurcation of the stellar surfaces is proposed to reconcile the contradicting scenarios derived based on different spectral diagnostics. C1 EUROPEAN SO OBSERV, D-85748 GARCHING, GERMANY. UNIV COLORADO, CASA, BOULDER, CO 80309 USA. NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RI Jennings, Donald/D-7978-2012 NR 39 TC 46 Z9 46 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1994 VL 423 IS 2 BP 806 EP 816 DI 10.1086/173859 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA095 UT WOS:A1994NA09500029 ER PT J AU PERIVOLAROPOULOS, L VACHASPATI, T AF PERIVOLAROPOULOS, L VACHASPATI, T TI PECULIAR VELOCITIES AND MICROWAVE BACKGROUND ANISOTROPIES FROM COSMIC STRINGS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMIC STRINGS; LARGE-SCALE STRUCTURE OF UNIVERSE ID SCALE STREAMING MOTION; GALAXY FORMATION; UNIVERSE; WAKES; EVOLUTION; FIELD; FLOW AB Using an analytic model, we show that the predictions of the cosmic string model for the peculiar velocities and the microwave background (MBR) anisotropy depend on similar combinations of string evolution parameters. Normalizing from the COBE detection of MBR anisotropy, and for certain reasonable values of string network evolution parameters, we find that the magnitude of predicted velocity flows is in good agreement with observations on small scales but is inconsistent with observations on large scales (> 50 h-1 Mpc). The cosmic Mach number obtained from the cosmic string scenario is found to depend on a single network evolution parameter and is consistent with observations on scales 5 h-1 Mpc to 20 h-1 Mpc. C1 TUFTS UNIV,TUFTS INST COSMOL,DEPT PHYS & ASTRON,MEDFORD,MA 02155. RP PERIVOLAROPOULOS, L (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Perivolaropoulos, Leandros/0000-0001-9330-2371 NR 38 TC 5 Z9 5 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1994 VL 423 IS 2 BP L77 EP L80 DI 10.1086/187240 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NA097 UT WOS:A1994NA09700001 ER PT J AU BERNARD, C HSIEH, P SONI, A AF BERNARD, C HSIEH, P SONI, A TI LATTICE CALCULATION OF THE DECAYS B-]K-ASTERISK+GAMMA AND B(S)-]PHI+GAMMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID STANDARD MODEL; MESON DECAY; B->K-STAR-GAMMA; B->S-GAMMA AB A lattice calculation of the form factors that determine the ''hadronization ratios,'' such as R(K)* and R(phi), where R(K)*=[GAMMA(B --> K* gamma)/GAMMA(b --> sgamma)], is presented in the quenched approximation. Lattice data shows strong evidence for the scaling law suggested by heavy quark symmetry for one of the form factors (i.e., T2). The data also gives strong support for the simple pole ansatz for the q2 dependence of T2 in the range of available q2. We thus find T2(0) = 0.10 +/- 0.01 +/- 0.03, yielding R(K)* = (6.0 +/- 1.2 +/- 3.4)%, we also find R(phi) = (6.6 +/- 1.3 +/- 3.7)%. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP WASHINGTON UNIV, DEPT PHYS, ST LOUIS, MO 63130 USA. NR 29 TC 42 Z9 42 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 7 PY 1994 VL 72 IS 10 BP 1402 EP 1405 DI 10.1103/PhysRevLett.72.1402 PG 4 WC Physics, Multidisciplinary SC Physics GA MZ115 UT WOS:A1994MZ11500003 ER PT J AU KAMPF, AR DUNN, PJ AF KAMPF, AR DUNN, PJ TI CHAVESITE DISCREDITED SO AMERICAN MINERALOGIST LA English DT Article AB The mineral described as chavesite by Murdoch (1958) is identical to monetite. esite is discredited as a distinct mineral species. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. RP KAMPF, AR (reprint author), NAT HIST MUSEUM LOS ANGELES,MINERAL SECT,900 EXPOSIT BLVD,LOS ANGELES,CA 90007, USA. NR 2 TC 1 Z9 1 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAR-APR PY 1994 VL 79 IS 3-4 BP 385 EP 386 PG 2 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA NG851 UT WOS:A1994NG85100019 ER PT J AU MYERS, S AF MYERS, S TI DEATH IN THE DINING-ROOM AND OTHER TALES OF VICTORIAN CULTURE - AMES,KL SO AMERICAN QUARTERLY LA English DT Book Review RP MYERS, S (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,DEPT SOCIAL CULTURAL HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU JOHNS HOPKINS UNIV PRESS PI BALTIMORE PA JOURNALS PUBLISHING DIVISION, 2715 NORTH CHARLES ST, BALTIMORE, MD 21218-4319 SN 0003-0678 J9 AM QUART JI Am. Q. PD MAR PY 1994 VL 46 IS 1 BP 92 EP 99 DI 10.2307/2713358 PG 8 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA ND124 UT WOS:A1994ND12400011 ER PT J AU REBBERT, M ISAACSON, P FISCHER, J GREENHOUSE, MA GROSSMAN, J PECKERAR, M SMITH, HA AF REBBERT, M ISAACSON, P FISCHER, J GREENHOUSE, MA GROSSMAN, J PECKERAR, M SMITH, HA TI MICROSTRUCTURE TECHNOLOGY FOR FABRICATION OF METAL-MESH GRIDS SO APPLIED OPTICS LA English DT Article DE FABRY-PEROT; FAR-INFRARED; METAL MESH; MICROSTRUCTURE TECHNOLOGY AB Motivated by the need for highly efficient far-IR Fabry-Perot etalons for airborne and space astronomy, we have developed a high-yield photolithographic technique for producing low-loss metal-mesh reflectors. We describe the production technique and report on the mesh flatness and uniformity. Optical measurements of meshes produced by this technique show that absorptivity of less than 1% with reflectivity of more than 98% was achieved at the longest wavelengths measured, which proved them to be significantly more efficient than commercially available meshes. This process can achieve wire widths that are less than the mesh thicknesses (typically 3 mum), which extends their applicability to wavelengths as short as approximately 20 mum without sacrificing mechanical strength for airborne and space-flight applications. C1 SMITHSONIAN INST, NATL AIR & SPACE MUSEUM, ASTROPHYS LAB, WASHINGTON, DC 20560 USA. SACHS FREEMAN ASSOCIATES INC, LANDOVER, MD 20785 USA. USN, RES LAB, DIV REMOTE SENSING, WASHINGTON, DC 20375 USA. RP REBBERT, M (reprint author), USN, RES LAB, DIV ELECTR SCI & TECHNOL, CODE 6804, WASHINGTON, DC 20375 USA. NR 12 TC 13 Z9 13 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD MAR 1 PY 1994 VL 33 IS 7 BP 1286 EP 1292 PG 7 WC Optics SC Optics GA NB422 UT WOS:A1994NB42200026 PM 20862153 ER PT J AU DIAFERIO, A GELLER, MJ RAMELLA, M AF DIAFERIO, A GELLER, MJ RAMELLA, M TI THE FORMATION OF COMPACT-GROUPS OF GALAXIES .1. OPTICAL-PROPERTIES SO ASTRONOMICAL JOURNAL LA English DT Article ID COLD DARK MATTER; N-BODY SIMULATIONS; DYNAMICAL EVOLUTION; LUMINOSITY FUNCTION; CLUSTERS; MERGERS; DENSE AB The small crossing time of compact groups of galaxies (t(cr) H-0 less than or similar to 0.02) makes it hard to understand why they are observable at all. Our dissipationless N-body simulations show that within a single rich collapsing group compact groups of galaxies continually form. The mean lifetime of a particular compact configuration is approximately 1 Gyr. On this time scale, members may merge and/or other galaxies in the loose group may join the compact configuration. In other words, compact configurations are continually replaced by new systems. The frequency of this process explains the observability of compact groups. Our model produces compact configurations (CG's) with optical properties remarkably similar to Hickson's [ApJ, 255, 382 (1982)] compact groups (HCG's): (1) CG's have a frequency distribution of members similar to that of HCG's; (2) CG's are almost-equal-to 10 times as dense as loose groups; (3) CG's have dynamical properties remarkably similar to those of HCG's; (4) most of the galaxy members of CG's are not merger remnants. The crucial aspect of the model is the relationship between CG's and the surrounding rich loose group. Our model predicts the frequency of occurrence of CG's. A preliminary analysis of 18 rich loose groups is consistent with the model prediction. We suggest further observational tests of the model. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OSSERV ASTRON TRIESTE,I-34131 TRIESTE,ITALY. RP DIAFERIO, A (reprint author), UNIV MILAN,DIPARTIMENTO FIS,VIA CELORIA 16,I-20133 MILAN,ITALY. NR 72 TC 98 Z9 99 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1994 VL 107 IS 3 BP 868 EP 879 DI 10.1086/116900 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ128 UT WOS:A1994MZ12800002 ER PT J AU WINDHORST, RA SCHMIDTKE, PC PASCARELLE, SM GORDON, JM GRIFFITHS, RE RATNATUNGA, KU NEUSCHAEFER, LW ELLIS, RS GILMORE, G GLAZEBROOK, K GREEN, RF HUCHRA, JP ILLINGWORTH, GD KOO, DC TYSON, JA AF WINDHORST, RA SCHMIDTKE, PC PASCARELLE, SM GORDON, JM GRIFFITHS, RE RATNATUNGA, KU NEUSCHAEFER, LW ELLIS, RS GILMORE, G GLAZEBROOK, K GREEN, RF HUCHRA, JP ILLINGWORTH, GD KOO, DC TYSON, JA TI HUBBLE-SPACE-TELESCOPE MEDIUM DEEP SURVEY .2. DECONVOLUTION OF WIDE-FIELD CAMERA FIELD GALAXY IMAGES IN THE 13(H)+43-DEGREES FIELD SO ASTRONOMICAL JOURNAL LA English DT Article ID FAINT GALAXIES; RADIO GALAXY; GHZ AB We present isophotal profiles of six faint field galaxies from some of the first deep images taken for the Hubble Space Telescope (HST) Medium Deep Survey (MDS). These have redshifts in the range z = 0.126-0.401. The images were taken with the Wide Field Camera (WFC) in ''parallel mode'' and deconvolved with the Lucy method using as the point-spread function nearby stars in the image stack-The WFC deconvolutions have a dynamic range of 16-20 dB (4-5 mag) and an effective resolution less than or similar to 0.2'' (FWHM). The multiorbit HST images allow us to trace the morphology, light profiles, and color gradients of faint field galaxies down to V congruent-to 22-23 mag at sub-kpc resolution, since the redshift range covered is z = 0.1-0.4. The goals of the MDS are to study the sub-kpc scale morphology, light profiles, and color gradients for a larger sample of faint field galaxies down to V congruent-to 23 mag, and to trace the fraction of early to late-type galaxies as function of cosmic time. In this paper we study the brighter MDS galaxies in the 13h+43-degrees MDS field in detail, and investigate to what extent model fits with pure exponential disks or a1/4 bulges are justified at V less than or similar to 22 mag. Four of the six field galaxies have light profiles that indicate (small) inner bulges following r1/4 laws down to 0.2'' resolution, plus a dominant surrounding exponential disk with little or no color gradients. Two occur in a group at z = 0.401, two are barred spiral galaxies at z = 0.179 and z = 0.302, and two are rather subluminous (and edge-on) disk galaxies at z = 0.126 and z = 0.179. Our deep MDS images can detect galaxies down to V, I less than or similar to 25-26 mag, and demonstrate the impressive potential of HST-even with its pre-refurbished optics-to resolve morphological details in galaxies at cosmologically significant distances ( V less than or similar to 23 mag). Since the median redshift of these galaxies is less than or similar to 0.4, the HST resolution allows us to study sub-kpc size scales at the galaxy, which cannot be done with stable images over wide fields from the best ground-based sites. C1 JOHNS HOPKINS UNIV,BLOOMBERG CTR PHYS & ASTRON,BALTIMORE,MD 21218. UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND. NATL OPT ASTRON OBSERV,TUCSON,AZ 85726. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF SANTA CRUZ,LICK OBSERV,SANTA CRUZ,CA 95064. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP WINDHORST, RA (reprint author), ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287, USA. RI Glazebrook, Karl/N-3488-2015 OI Glazebrook, Karl/0000-0002-3254-9044 NR 48 TC 26 Z9 26 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1994 VL 107 IS 3 BP 930 EP 945 DI 10.1086/116907 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ128 UT WOS:A1994MZ12800009 ER PT J AU HARMON, JK OSTRO, SJ CHANDLER, JF HUDSON, RS AF HARMON, JK OSTRO, SJ CHANDLER, JF HUDSON, RS TI RADAR RANGING TO GANYMEDE AND CALLISTO SO ASTRONOMICAL JOURNAL LA English DT Article ID GALILEAN SATELLITES; ECLIPSES; MARS AB Arecibo observations from 1992 February to March have yielded the first successful radar range measurements to the Galilean satellites. Round-trip time delays were measured for Ganymede and Callisto with accuracies of 20-50 mus (3-7 km) and 90 mus ( 14 km), respectively. Both satellites showed round-trip delay residuals (relative to the E-3 ephemeris) of about a millisecond, most of which can be attributed to errors in the predicted along-track positions (orbital phases). Using a simple model that assumed that all of the ephemeris error was due to constant orbital phase and Jupiter range errors, we estimate that Ganymede was leading its ephemeris by 122 +/- 4 km, Callisto was lagging its ephemeris by 307 +/- 14 km, and Jupiter was 11 +/- 4 km more distant than predicted by the PEP740 planetary ephemeris. C1 JET PROP LAB,PASADENA,CA 91109. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. WASHINGTON STATE UNIV,SCH ELECT ENGN & COMP SCI,PULLMAN,WA 99164. RP HARMON, JK (reprint author), NATL ASTRON & IONOSPHERE CTR,ARECIBO,PR 00613, USA. NR 16 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1994 VL 107 IS 3 BP 1175 EP 1181 DI 10.1086/116929 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ128 UT WOS:A1994MZ12800031 ER PT J AU EIROA, C MIRANDA, LF ANGLADA, G ESTALELLA, R TORRELLES, JM AF EIROA, C MIRANDA, LF ANGLADA, G ESTALELLA, R TORRELLES, JM TI HERBIG-HARO OBJECTS ASSOCIATED WITH EXTREMELY YOUNG SOURCES IN L-1527 AND L-1448 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE STARS, FORMATION; ISM, INDIVIDUAL OBJECTS, L-1527, L-1448; ISM, JETS AND OUTFLOWS; ISM, REFLECTION NEBULAE ID SUBMILLIMETER-WAVELENGTH OBSERVATIONS; SPECTACULAR MOLECULAR OUTFLOW; FORMING DENSE CORES; BIPOLAR OUTFLOW; EXCITING SOURCE; REGIONS; EMISSION; CLOUDS; IMAGES; TAURUS AB We present I, Halpha and [S II] CCD images of the dense cores L 1527 and L 1448. A diffuse reflection nebulosity is observed in L 1527. A red spectrum shows that superimposed on the reflection nebulosity there is HH emission of low excitation and very low radial velocity, upsilon(lsr) almost-equal-to 5.2 km s-1. The object is most probably excited by the very young Class 0 object IRAS 04368 + 2557. The data suggest that the IRAS source is surrounded by a dense, flattened circumstellar envelope seen edge-on and approximately oriented in a NS direction. The HH emission and reflection nebula are located along the polar direction of this envelope. A reflection nebulosity and HH emission is also observed in L 1448. We suggest that they are associated with the Class 0 object L 1448N (IRAS 03225 + 3034). Our findings increase to four the number of Class 0 objects associated with HH emission, which represents almost-equal-to 30% of the Class 0 sources known to date. C1 UNIV COMPLUTENSE MADRID, FAC CIENCIAS FIS, DEPT ASTROFIS, E-28040 MADRID, SPAIN. UNIV BARCELONA, DEPT ASTRON & METEOROL, E-08028 BARCELONA, SPAIN. IEC, SOC CATALANA FIS, ASTROFIS LAB, BARCELONA, SPAIN. INST ASTROFIS ANDALUCIA, E-18080 GRANADA, SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP EIROA, C (reprint author), UNIV AUTONOMA MADRID, FAC CIENCIAS, DEPT FIS TEOR C-XI, E-28049 MADRID, SPAIN. OI Torrelles, Jose Maria/0000-0002-6896-6085 NR 31 TC 23 Z9 23 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1994 VL 283 IS 3 BP 973 EP 977 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NC576 UT WOS:A1994NC57600033 ER PT J AU HO, PTP TEREBEY, S TURNER, JL AF HO, PTP TEREBEY, S TURNER, JL TI THE ROTATING MOLECULAR CORE IN G10.6-0.4 - SYNTHESIS MAPS IN (CO)-C-12-O-18 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (G10.6-0.4); ISM, KINEMATICS AND DYNAMICS; ISM, MOLECULES ID STAR-FORMING REGION; H-II REGIONS; GRAVITATIONAL COLLAPSE; OB CLUSTERS; CLOUD AB Using the Owens Valley Radio Observatory millimeter-wave interferometer, the compact molecular cloud core surrounding the H II region G10.60-0.4 has been resolved in the (CO)-O-18 J = 1-0 transition. Since this line is most likely optically thin, it is an excellent tracer of the total column density. We find a centrally condensed and flattened (12''6 x 4''2; 0.3 pc x 0.1 pc) core, which is rotating rapidly with a substantial velocity gradient (17 +/- 2 km s-1 pc-1) along the major axis. The core is quite bright (> 10 K), dense (> 10(6) cm-3), massive (10(3) M.), and embedded in a more extended (>60'') envelope. There is no evidence for absorption, implying that the (CO)-O-18 emitting gas is both optically thin and substantially hotter than the equivalent continuum temperature at 3 mm. The systemic velocity of the rotating core is - 2.5 +/-0.5 km s-1, the same as the systemic velocity of the extended cloud. C1 CALTECH,PASADENA,CA 91125. UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024. IPAC 10022,JET PROPULS LAB,PASADENA,CA 91125. RP HO, PTP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 12 TC 20 Z9 20 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1994 VL 423 IS 1 BP 320 EP 325 DI 10.1086/173809 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ152 UT WOS:A1994MZ15200026 ER PT J AU LIS, DC MENTEN, KM SERABYN, E ZYLKA, R AF LIS, DC MENTEN, KM SERABYN, E ZYLKA, R TI STAR-FORMATION IN THE GALACTIC-CENTER DUST RIDGE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, CENTER; MASERS; STARS, FORMATION ID FAR-INFRARED SURVEY; SAGITTARIUS; MASERS; SCALE AB We present multiwavelength submillimeter and radio continuum, as well as 22 GHz H2O line observations of the giant molecular cloud core M0.25+0.01 located in the ''dust ridge'' near the Galactic center radio arc. At lambda = 350 mum the continuum emission region is spatially resolved by our 12' beam, and we find no evidence for compact dust sources similar to those found in Sgr B2. Although existing far-infrared data do not allow for accurate determination of the dust temperature, the steep rise of the submillimeter spectrum between 800 and 350 mum suggests that the grain emissivity law in the MO.25+0.01 core may be significantly steeper than in previously studied Galactic center dust sources. The detection of an H2O maser source located near the 350 mum emission peak implies the presence of at least some ongoing low-mass star formation. However, in spite of the relatively large molecular mass of the core implied by the submillimeter observations (almost-equal-to 1.6 x 10(5) M.), our 8.4 GHz continuum data show that current star formation in the MO.25+0.01 core is limited to stars with spectral types later than BO; there is no evidence for more massive young stars. This GMC core thus appears distinctly different from the Sgr C and D cores, which, although much less massive, harbor O-type stars. C1 MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP LIS, DC (reprint author), CALTECH,DOWNS LAB PHYS 32047,PASADENA,CA 91125, USA. NR 19 TC 42 Z9 42 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1994 VL 423 IS 1 BP L39 EP L42 DI 10.1086/187230 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ155 UT WOS:A1994MZ15500010 ER PT J AU ESCALANTE, V VICTOR, GA AF ESCALANTE, V VICTOR, GA TI TRANSITION-PROBABILITIES AND PHOTOIONIZATION OF NEUTRAL ATOMIC OXYGEN SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID OSCILLATOR-STRENGTHS; NITROGEN AB Photoionization cross sections and oscillator strengths for bound-bound transitions are presented for excited states of atomic oxygen with the ground-term core configuration. Principal quantum numbers up to 12, orbital angular momentum quantum numbers up to 3, and photoelectron energies up to 1 atomic unit (27.21 eV) are considered. Comparisons with theoretical and experimental results are shown. (C) 1994 Academic Pres., Inc. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA 02138 USA. RP NATL AUTONOMOUS UNIV MEXICO, INST ASTRON, CIUDAD UNIV, MEXICO CITY 04510, DF, MEXICO. NR 19 TC 3 Z9 3 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0092-640X EI 1090-2090 J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD MAR PY 1994 VL 56 IS 2 BP 213 EP 229 DI 10.1006/adnd.1994.1006 PG 17 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA NK262 UT WOS:A1994NK26200001 ER PT J AU ROUSE, RC PEACOR, DR DUNN, PJ SU, SC CHI, PH YEATES, H AF ROUSE, RC PEACOR, DR DUNN, PJ SU, SC CHI, PH YEATES, H TI SAMFOWLERITE, A NEW CA MN ZN BERYLLOSILICATE MINERAL FROM FRANKLIN, NEW-JERSEY - ITS CHARACTERIZATION AND CRYSTAL-STRUCTURE SO CANADIAN MINERALOGIST LA English DT Article DE SAMFOWLERITE; NEW MINERAL SPECIES; CRYSTAL STRUCTURE; BERYLLOSILICATE OF CALCIUM; MANGANESE AND ZINC; FRANKLIN; NEW-JERSEY AB Samfowlerite, ideally Ca14Mn3Zn2(Zn,Be)2Be6(SiO4)6(Si2O7)4(OH,F)6, is monoclinic, P2(1)/c, with a 9.068(2), b 17.992(2), c 14.586(2) angstrom, beta 104.86(1)-degrees, and Z = 2. It occurs as colorless 0.05-mm-diameter crystals in andradite-lined vugs in franklinite - willemite ore from Franklin, Sussex County, New Jersey. Electron- and ion-microprobe analyses yielded CaO 34.1, MgO 0.2, MnO 9.3, ZnO 9.5, BeO 5.6, SiO2 36.9, F 1.0, H2O (by difference) 3.8, less O=F 0.4, total 100 wt%. Optically, it is biaxial negative, 2V 29.0(1)-degrees, with alpha 1.674(3), beta 1.680(3), and gamma 1.681(3). The measured and calculated densities are 3.28 +/- 0.05 and 3.31 g/cm3, respectively. The strongest powder X-ray-diffraction lines are [d in angstrom (I)(hkl)]: 2.863(100)(321BAR,053), 2,653(50)(251), 2.388(50)(334BAR,172BAR), 2.771(40)(125BAR), 2.272(30)(172,234,402BAR,155BAR), 1.832(30)(374BAR), 1.860(20)(327BAR,406BAR,066), and 1.803(20)(381BAR,0.10.0,382BAR). The crystal structure has been solved and refined to an unweighted residual of 0.043 for 2495 observed reflections. Although samfowlerite is, strictly speaking, a mixed-anion (SiO4 and Si2O7) silicate, the structure may be viewed as being composed of layers of vertex-sharing TO4 tetrahedra (T = Si,Be,Zn) alternating with layers of vertex- and edge-sharing CaO8 bicapped trigonal prisms and MnO6 octahedra, the layers being parallel to (102). The TO4 groups and CaO8-MnO6 groups share vertices with one another across the layer boundaries to form the three-dimensional structure. Within the layers of tetrahedra, the TO4 groups form a network of 4-, 5-, and 8-membered rings. The apparent substitution of Be for Zn in the ratio 5/8 to 3/8 on one of the T sites suggests that the space group P2(1)/c is only that of an average structure, and that the true structure is of lower symmetry, with ordering of Zn and Be on separate sites. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. HERCULES INC,RES CTR,WILMINGTON,DE 19894. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. RP ROUSE, RC (reprint author), UNIV MICHIGAN,DEPT GEOL SCI,ANN ARBOR,MI 48109, USA. NR 8 TC 6 Z9 6 U1 0 U2 2 PU MINERALOGICAL ASSOC CANADA PI NEPEAN PA CITYVIEW 78087, NEPEAN ON K2G 5W2, CANADA SN 0008-4476 J9 CAN MINERAL JI Can. Mineral. PD MAR PY 1994 VL 32 BP 43 EP 53 PN 1 PG 11 WC Mineralogy SC Mineralogy GA NK856 UT WOS:A1994NK85600005 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI DIGITAL PHOTOGRAPHY - PICTURES OF TOMORROW - LARISH,J SO CD-ROM PROFESSIONAL LA English DT Book Review RP KALFATOVIC, MR (reprint author), SMITHSONIAN INST LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PEMBERTON PRESS INC PI WILTON PA 462 DANBURY RD, WILTON, CT 06897-2126 SN 1049-0833 J9 CD-ROM PROF JI CD-ROM Prof. PD MAR PY 1994 VL 7 IS 2 BP 163 EP 163 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA NK456 UT WOS:A1994NK45600028 ER PT J AU KUEHL, DW HAEBLER, R POTTER, C AF KUEHL, DW HAEBLER, R POTTER, C TI COPLANAR PCB AND METAL RESIDUES IN DOLPHINS FROM THE UNITED-STATES ATLANTIC COAST INCLUDING ATLANTIC BOTTLE-NOSED OBTAINED DURING THE 1987/88 MASS MORTALITY SO CHEMOSPHERE LA English DT Article ID MARINE MAMMALS; MONO-ORTHO; POLYCHLORINATED-BIPHENYLS; CHROMATOGRAPHY; CONGENERS; MERCURY; OCEAN; LAND AB Bottlenose dolphins (Tursiops truncatus) collected during the 1987/88 mass mortality event along the Atlantic coast of the United States have been analyzed for coplanar PCBs #77, 105, 126 and 169 in blubber, and for the metals Hg, Pb, Cd, Mn, and Cr, and the non-metallic element Se in liver. Results have been compared to two reference species, common (Delphinus delphis) and white-sided (Lagenorhynchus acutus) dolphins. The three most toxic PCB congeners (#77, 126 and 169) contributed less than 1% of the total TCDD toxic equivalent concentration (TEC) calculated for all di-, mono- and non-ortho chlorine substituted PCBs in adult male animals. The total TEC for the four PCBs was approximately 4.5 times lower in adult female bottlenose than in male. The mean concentrations of Pb, Cd, Mn and Cr in adult male bottlenose dolphins were at or below the mean concentrations in the two reference species. The mean concentration of mercury was highest in adult female bottlenose dolphins. However, mercury concentrations in all animals studied correlated with selenium concentrations (r=0.86) at a 1:1 mole ratio, indicating that selenium may protect these animals from mercury toxicity. C1 US EPA,ENVIRONM RES LAB NARRAGANSETT,NARRAGANSETT,RI 02882. SMITHSONIAN INST,MUSEUM NAT HIST,WASHINGTON,DC 20562. RP KUEHL, DW (reprint author), US EPA,ENVIRONM RES LAB DULUTH,DULUTH,MN 55804, USA. NR 28 TC 29 Z9 30 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-6535 J9 CHEMOSPHERE JI Chemosphere PD MAR PY 1994 VL 28 IS 6 BP 1245 EP 1253 DI 10.1016/0045-6535(94)90341-7 PG 9 WC Environmental Sciences SC Environmental Sciences & Ecology GA NH451 UT WOS:A1994NH45100018 ER PT J AU KRESS, WJ MADDOX, GD ROESEL, CS AF KRESS, WJ MADDOX, GD ROESEL, CS TI GENETIC-VARIATION AND PROTECTION PRIORITIES IN PTILIMNIUM-NODOSUM (APIACEAE), AN ENDANGERED PLANT OF THE EASTERN UNITED-STATES SO CONSERVATION BIOLOGY LA English DT Note RP KRESS, WJ (reprint author), SMITHSONIAN INST,DEPT BOT,NHB 166,WASHINGTON,DC 20560, USA. NR 0 TC 15 Z9 15 U1 1 U2 7 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0888-8892 J9 CONSERV BIOL JI Conserv. Biol. PD MAR PY 1994 VL 8 IS 1 BP 271 EP 276 DI 10.1046/j.1523-1739.1994.08010271.x PG 6 WC Biodiversity Conservation; Ecology; Environmental Sciences SC Biodiversity & Conservation; Environmental Sciences & Ecology GA NC662 UT WOS:A1994NC66200032 ER PT J AU SIEGEL, FR SLABODA, ML STANLEY, DJ AF SIEGEL, FR SLABODA, ML STANLEY, DJ TI METAL POLLUTION LOADING, MANZALAH LAGOON, NILE DELTA, EGYPT - IMPLICATIONS FOR AQUACULTURE SO ENVIRONMENTAL GEOLOGY LA English DT Article DE METAL POLLUTION; MANZALAH LAGOON; EGYPT; AQUACULTURE ID SEDIMENTS AB High cultural enrichment factors are found for Hg (13 x), Pb(22.1 x), and other potentially toxic metals (e.g., Sn, Zn, Cu, Ag) in the upper 20 cm of sediment cores from the southeastern Ginka subbasin of Manzalah lagoon, Nile delta, Egypt. Cores from other areas of the lagoon show little metal loading. Metal loading followed the closure of the Aswan High Dam, the availability of abundant cheap electricity, and the development of major power-based industries. Industrial wastes containing potentially toxic metals are dumped into the Nile delta drain system. The load carried by Bahr El-Baqar drain discharges into the Ginka subbasin, which acts as a sink and results in metal loading of the sediment deposited there. Further development of aquaculture in this subbasin, of food-stuff agriculture on recently reclaimed lagoon bottom, or where irrigation waters come from Bahr El-Baqar drain or its discharge should be halted or strictly limited until potentially toxic metals in the drain waters and sediment are removed and polluted input drastically reduced. This environmental assessment of heavy metals in aquaculture or agriculture development should extend to other waterbodies in the northern Nile delta, particularly Idku lagoon and lake Mariut, where industrial metal-bearing wastes discharge into the waterbodies. C1 SMITHSONIAN INST,MEDITERRANEAN BASIN PROGRAM,WASHINGTON,DC 20560. RP SIEGEL, FR (reprint author), GEORGE WASHINGTON UNIV,DEPT GEOL,WASHINGTON,DC 20052, USA. NR 22 TC 43 Z9 47 U1 0 U2 11 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0177-5146 J9 ENVIRON GEOL JI Environ. Geol. PD MAR PY 1994 VL 23 IS 2 BP 89 EP 98 PG 10 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA NF455 UT WOS:A1994NF45500002 ER PT J AU GALLEGOS, CL AF GALLEGOS, CL TI REFINING HABITAT REQUIREMENTS OF SUBMERSED AQUATIC VEGETATION - ROLE OF OPTICAL-MODELS SO ESTUARIES LA English DT Article ID DISSOLVED ORGANIC-MATTER; UNDERWATER LIGHT-FIELD; SCATTERING COEFFICIENTS; ABSORPTION-SPECTRA; OCEANIC WATERS; RIVER ESTUARY; MONTE-CARLO; ATTENUATION; PHYTOPLANKTON; GROWTH AB A model of the spectral diffuse attenuation coefficient of downwelling irradiance was constructed for Chincoteague Bay, Maryland, and the Rhode River, Maryland. The model is written in terms of absorption spectra of dissolved yellow substance, the chlorophyll-specific absorption of phytoplankton, and absorption and scattering by particulate matter (expressed as turbidity). Based on published light requirements for submersed aquatic vegetation (SAV) in Chesapeake Bay the model is used to calculate the range of water-quality conditions that permit survival of SAV at various depths. Because the model is spectrally based, it can be used to calculate the attenuation of either photosynthetically active radiation (PAR, equally weighted quanta from 400 nm to 700 nm) or photosynthetically usable radiation (PUR, the integral of the quantum spectrum weighted by the pigment absorption spectrum of SAV). PUR is a more accurate measurement of light that can be absorbed by SAV and it is more strongly affected by phytoplankton chlorophyll in the water column than is PAR. For estuaries in which light attenuation is dominated by turbidity and chlorophyll, the model delimits regions in which turbidity alone (chlorophyll < 10 mug l-1). chlorophyll alone (turbidity < 1 NTU) or both factors (chlorophyll > 10 mug l-1, turbidity > 1 NTU) must be reduced to improve survival depths for SAV. RP GALLEGOS, CL (reprint author), SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037, USA. OI Gallegos, Charles/0000-0001-5112-0166 NR 38 TC 28 Z9 30 U1 1 U2 7 PU ESTUARINE RES FEDERATION PI LAWRENCE PA PO BOX 368, LAWRENCE, KS 66044 SN 0160-8347 J9 ESTUARIES JI Estuaries PD MAR PY 1994 VL 17 IS 1B BP 187 EP 199 DI 10.2307/1352568 PG 13 WC Environmental Sciences; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA NV727 UT WOS:A1994NV72700009 ER PT J AU LOWEN, RS AF LOWEN, RS TI SCIENCE AT HARVARD-UNIVERSITY - HISTORICAL PERSPECTIVES - ELLIOT,CA, ROSSITER,MW SO HISTORY OF EDUCATION QUARTERLY LA English DT Book Review RP LOWEN, RS (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 2 U2 2 PU HISTORY EDUC QUARTERLY PI BLOOMINGTON PA SCHOOL OF EDUCATION INDIANA UNIVERSITY, BLOOMINGTON, IN 47405 SN 0018-2680 J9 HIST EDUC QUART JI Hist. Educ. Q. PD SPR PY 1994 VL 34 IS 1 BP 124 EP 125 DI 10.2307/369253 PG 2 WC Education & Educational Research; History Of Social Sciences SC Education & Educational Research; Social Sciences - Other Topics GA NG081 UT WOS:A1994NG08100030 ER PT J AU EKLUND, J AF EKLUND, J TI THE RESERVISOR AUTOMATED AIRLINE RESERVATION SYSTEM - COMBINING COMMUNICATIONS AND COMPUTING SO IEEE ANNALS OF THE HISTORY OF COMPUTING LA English DT Article AB Shortly after the beginnings of the computer in the mid-1940s, a machine appeared that was the first in a long line of important commercial systems integrating communications and processing: the Reservisor airline reservation system built by the Teleregister Corporation. A few parts of the original have been preserved at the Smithsonian Institution, and there are enough records to understand both the basic issues in the airline industry that led to the development of this remarkable device and how the machine helped solve some of the problems of rapidly evolving air-transport technology. This article also discusses the place of the Reservisor in the larger view of the development of information technology. C1 SMITHSONIAN INST,NATL MUSEUM AMER HIST,DIV PHYS SCI,WASHINGTON,DC 20560. RP EKLUND, J (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,DIV COMP INFORMAT & SOC,WASHINGTON,DC 20560, USA. NR 15 TC 3 Z9 3 U1 0 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 1058-6180 J9 IEEE ANN HIST COMPUT JI IEEE Ann. Hist. Comput. PD SPR PY 1994 VL 16 IS 1 BP 62 EP 69 DI 10.1109/85.251855 PG 8 WC Computer Science, Theory & Methods; History & Philosophy Of Science SC Computer Science; History & Philosophy of Science GA MQ940 UT WOS:A1994MQ94000004 ER PT J AU TONG, CYE BLUNDELL, R AF TONG, CYE BLUNDELL, R TI A SELF-DIPLEXING QUASI-OPTICAL MAGIC SLOT BALANCED MIXER SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article ID MILLIMETER-WAVE; ASTRONOMY AB Drawing on the principles of operation of the magic tee balanced mixer, a quasi-optical magic slot balanced mixer is proposed. The mixer exploits a diametrically fed annular slot radiator which radiates two orthogonal polarizations which are used as signal and local oscillator input ports. The idea has been tested at microwave frequencies. The measured radiation impedances, radiation patterns and conversion efficiency show that reasonable performance is readily obtained over a 30% bandwidth and that this quasi-optical balanced mixer is suitable for sub-millimeter wave applications. RP TONG, CYE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,SUBMILLIMETER RECEIVER LAB,CAMBRIDGE,MA 02138, USA. OI Tong, Edward/0000-0002-7736-4203 NR 16 TC 6 Z9 6 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD MAR PY 1994 VL 42 IS 3 BP 383 EP 388 DI 10.1109/22.277430 PG 6 WC Engineering, Electrical & Electronic SC Engineering GA NG445 UT WOS:A1994NG44500003 ER PT J AU FAZIO, GG AF FAZIO, GG TI INFRARED ARRAY DETECTORS IN ASTROPHYSICS SO INFRARED PHYSICS & TECHNOLOGY LA English DT Article; Proceedings Paper CT 5th International Conference on Infrared Physics (CIRPS 5): Topical Conference on Infrared Astrophysics CY JUN 20-25, 1993 CL CTR STEFANO FRANSCINI, MONTE VERITA, ASCONA, SWITZERLAND SP SWISS SOC ASTROPHYS & ASTRON, SWISS PHYS SOC, SWISS ACAD NAT SCI, COMM SPACE RES HO CTR STEFANO FRANSCINI, MONTE VERITA AB A brief review is presented on the present status and recent advances in infrared array technology and its application to astronomical observations, both for ground-based and space applications. Future developments in array technology are discussed as well as future astronomical instrumentation. RP FAZIO, GG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS-65,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 15 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1350-4495 J9 INFRARED PHYS TECHN JI Infrared Phys. Technol. PD MAR-APR PY 1994 VL 35 IS 2-3 BP 107 EP 117 DI 10.1016/1350-4495(94)90072-8 PG 11 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA NK781 UT WOS:A1994NK78100005 ER PT J AU HOFFMANN, WF FAZIO, GG SHIVANANDAN, K HORA, JL DEUTSCH, LK AF HOFFMANN, WF FAZIO, GG SHIVANANDAN, K HORA, JL DEUTSCH, LK TI ASTRONOMICAL OBSERVATIONS WITH THE MIDINFRARED ARRAY CAMERA, MIRAC SO INFRARED PHYSICS & TECHNOLOGY LA English DT Article AB MIRAC is a Mid-InfraRed Array Camera built for ground-based astronomy by Steward Observatory at the University of Arizona, Harvard Smithsonian Center for Astrophysics, and the Center for Advanced Space Sensing at the Naval Research Laboratory. It utilizes a Hughes Aircraft Co. 20 x 64 pixel arsenic-doped silicon impurity-band-conduction hybrid array with a capacitance-transimpedance-amplifierreadout (CRC 444A). The detector has an operating wavelength range of 2-26 mum. The camera has been operated on the Steward Observatory 1.5- and 2.3-m and the NASA 3-m IRTF telescopes to observe a variety of sources including solar system objects, young stellar objects, planetary nebulae, infrared-luminous galaxies, star forming regions, and brown dwarfs. C1 GEN RES CORP, DIV SPACE, SANTA BARBARA, CA USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NASA, AMES RES CTR, MOFFETT FIELD, CA 94035 USA. UNIV CALIF BERKELEY, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, BERKELEY, CA 94720 USA. UNIV HAWAII, INST ASTRON, HONOLULU, HI 96822 USA. RP HOFFMANN, WF (reprint author), UNIV ARIZONA, STEWARD OBSERV, TUCSON, AZ 85721 USA. OI Hora, Joseph/0000-0002-5599-4650 NR 17 TC 7 Z9 7 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1350-4495 J9 INFRARED PHYS TECHN JI Infrared Phys. Technol. PD MAR-APR PY 1994 VL 35 IS 2-3 BP 175 EP 194 DI 10.1016/1350-4495(94)90079-5 PG 20 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA NK781 UT WOS:A1994NK78100012 ER PT J AU LEAR, LJ AF LEAR, LJ TI MADE FROM THIS EARTH - AMERICAN WOMEN AND NATURE - NORWOOD,V SO ISIS LA English DT Book Review RP LEAR, LJ (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD MAR PY 1994 VL 85 IS 1 BP 130 EP 131 DI 10.1086/356736 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA NB786 UT WOS:A1994NB78600019 ER PT J AU STINE, JK AF STINE, JK TI WORLDWIDE SCIENCE AND TECHNOLOGY ADVICE TO THE HIGHEST LEVELS OF GOVERNMENTS - GOLDEN,WT SO ISIS LA English DT Book Review RP STINE, JK (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 1 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD MAR PY 1994 VL 85 IS 1 BP 175 EP 177 PG 3 WC History & Philosophy Of Science SC History & Philosophy of Science GA NB786 UT WOS:A1994NB78600068 ER PT J AU LOWEN, RS AF LOWEN, RS TI RESEARCH AND RELEVANT KNOWLEDGE - AMERICAN RESEARCH UNIVERSITIES SINCE WORLD-WAR-II - GEIGER,RL SO ISIS LA English DT Book Review RP LOWEN, RS (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD MAR PY 1994 VL 85 IS 1 BP 177 EP 177 DI 10.1086/356783 PG 1 WC History & Philosophy Of Science SC History & Philosophy of Science GA NB786 UT WOS:A1994NB78600071 ER PT J AU SMITH, RW AF SMITH, RW TI BEYOND SOUTHERN SKIES - RADIO ASTRONOMY AND THE PARKES TELESCOPE - ROBERTSON,P SO ISIS LA English DT Book Review RP SMITH, RW (reprint author), SMITHSONIAN INST,NAT AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD MAR PY 1994 VL 85 IS 1 BP 177 EP 178 DI 10.1086/356784 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA NB786 UT WOS:A1994NB78600072 ER PT J AU CERUZZI, PE AF CERUZZI, PE TI BEFORE THE COMPUTER - IBM, NCR, BURROUGHS, AND REMINGTON-RAND AND THE INDUSTRY THEY CREATED, 1865-1956 - CORTADA,JW SO JOURNAL OF AMERICAN HISTORY LA English DT Book Review RP CERUZZI, PE (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION AMER HISTORIANS PI BLOOMINGTON PA 112 N BRYAN ST, BLOOMINGTON, IN 47408 SN 0021-8723 J9 J AM HIST JI J. Am. Hist. PD MAR PY 1994 VL 80 IS 4 BP 1487 EP 1488 DI 10.2307/2080680 PG 2 WC History SC History GA NC087 UT WOS:A1994NC08700119 ER PT J AU POST, RC AF POST, RC TI WEST-COAST JAZZ - MODERN JAZZ IN CALIFORNIA, 1945-1960 - GIOIA,T SO JOURNAL OF AMERICAN HISTORY LA English DT Book Review RP POST, RC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION AMER HISTORIANS PI BLOOMINGTON PA 112 N BRYAN ST, BLOOMINGTON, IN 47408 SN 0021-8723 J9 J AM HIST JI J. Am. Hist. PD MAR PY 1994 VL 80 IS 4 BP 1528 EP 1529 DI 10.2307/2080727 PG 2 WC History SC History GA NC087 UT WOS:A1994NC08700169 ER PT J AU ROTH, TL HOWARD, J WILDT, DE AF ROTH, TL HOWARD, J WILDT, DE TI ZONA-PELLUCIDA PIERCING ENHANCES ZONA PENETRATION BY SPERMATOZOA FROM NORMOSPERMIC AND TERATOSPERMIC DOMESTIC CATS SO JOURNAL OF ANDROLOGY LA English DT Article DE FELID; MICROMANIPULATION; SPERM; TERATOSPERMIA; ZONA PELLUCIDA; ZONA PIERCING ID INVITRO FERTILIZATION; FOLLICULAR OOCYTES; EMBRYO DEVELOPMENT; FELIS-BENGALENSIS; SPERM; DISSECTION; MATURATION; LEOPARD; CAPACITATION; MORPHOLOGY AB Poor quality ejaculates appear associated with reduced zona penetration and poor fertilization in vitro in some felid species or populations. Even morphologically normal sperm from these teratospermic ejaculates are compromised in ability to penetrate the zona pellucida and fertilize oocytes. A domestic cat model and zona piercing were used to study the function of normal and malformed sperm. Male cats naturally producing different proportions of morphologically normal sperm (group I, > 60%; group II, 45-55%; group III, <40%) were identified. Electroejaculates were subjected to sperm washing (WS) and half of these to swim-up (SU) processing following WS, and all samples were assessed for a sperm motility index (SMI) over time. Zonae of salt-stored (SS), domestic cat oocytes were mechanically pierced (ZnPd) three times each. Control (nonmanipulated) SS oocytes (n = 430) and ZnPd-SS oocytes (n = 430) were coincubated with sperm in vitro. The proportion of morphologically normal sperm/ejaculate differed (P < 0.05) among groups averaging 68.8% for group I, 53.5% for group II, and 34.7% for group III. After SU processing, the percent normal sperm among groups was similar (P > 0.05; range, 70.8-80.2%). Average SMI for all groups was high (>70) at 0 hour and decreased over time, but the descent of slope was greater (P < 0.05) for group III than groups I and II. The proportion of oocytes penetrated was not influenced (P > 0.05) by sperm-processing treatment. For all groups, inner zona penetration was greater (P < 0.05) in ZnPd-SS than SS oocytes (group I, 52.3% vs. 34.9%; group II, 37.9% vs. 20.3%; group III, 32.0% vs. 17.2%). Similarly, zona piercing increased (P < 0.05) the proportion of oocytes with sperm in the perivitelline space (group I, 11.7% vs. 0.8%; group II, 5.6% vs. 0.0%; group III, 7.0% vs. 0.8%). Although the incidence of penetration by pleiomorphic sperm was low overall, more (P < 0.05) malformed sperm penetrated the inner zona of oocytes in groups II and III than in group I. Most importantly, zona piercing did not increase (P > 0.05) oocyte penetration by aberrant sperm. In summary, zona piercing increases the incidence of inner zona penetration by sperm from both normo-and teratospermic cats without completely disrupting the ability of the zona to filter pleiomorphic sperm. RP ROTH, TL (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT REPROD PHYSIOL,WASHINGTON,DC 20008, USA. FU NICHD NIH HHS [R0 1 HD 23853] NR 35 TC 15 Z9 15 U1 0 U2 1 PU AMER SOC ANDROLOGY, INC PI LAWRENCE PA C/O ALLEN PRESS, INC PO BOX 368, LAWRENCE, KS 66044 SN 0196-3635 J9 J ANDROL JI J. Androl. PD MAR-APR PY 1994 VL 15 IS 2 BP 165 EP 173 PG 9 WC Andrology SC Endocrinology & Metabolism GA NG730 UT WOS:A1994NG73000011 PM 8056640 ER PT J AU TAO, FM KLEMPERER, W MCCARTHY, MC GOTTLIEB, CA THADDEUS, P AF TAO, FM KLEMPERER, W MCCARTHY, MC GOTTLIEB, CA THADDEUS, P TI AN AB-INITIO STUDY OF THE HNCN RADICAL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-ORBITAL METHODS; COUPLED-CLUSTER; WAVE; ACID AB The equilibrium structure for the ground state of the HNCN radical is calculated at the levels of the self-consistent field theory (SCF), the. second-order Moller-Plesset perturbation approximation (MP2), and the full single and double excitation coupled cluster theory including all connected triples in a noniterative manner [CCSD(T)], using various extended basis sets starting from 6-311 G(d,p). At the CCSD(T) level, the outer C-N bond is more than 0.1 Angstrom shorter than the inner one and the N-C-N group departs from linearity by 6 degrees. The total N-C-N length is in good agreement with the experimental value [Herzberg and Warsop, Can. J. Phys. 41, 286 (1963)], however, the H-N-C angle is about 6 degrees smaller. The N-H bond is very close to a normal N-H bond but is about 0.2 Angstrom smaller than the experimental estimate. Except for the smaller H-N-C angle, the geometrical parameters for HNCN closely parallel those for the triplet HCCN molecule. The dipole moment, harmonic frequencies, electric quadrupole, and Fermi contact coupling constants of HNCN are also calculated. The calculated harmonic frequencies confirm the preliminary assignments of Wu, Hall, and Sears [J. Chem. Sec. Faraday Trans. 89, 615 (1993)]. The quadrupole coupling constants for the inner and outer N atoms are comparable, implying a complex pattern of hyperfine split components in the lowest rotational transitions. The present calculation may thus serve as a useful guide for the interpretation of the rotational spectrum. C1 HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TAO, FM (reprint author), HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138, USA. OI McCarthy, Michael/0000-0001-9142-0008 NR 24 TC 18 Z9 18 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 1 PY 1994 VL 100 IS 5 BP 3691 EP 3694 DI 10.1063/1.466357 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA MY349 UT WOS:A1994MY34900032 ER PT J AU LOIZEAU, JL STANLEY, DJ AF LOIZEAU, JL STANLEY, DJ TI BOTTOM SEDIMENT PATTERNS EVOLVING IN POLLUTED MARIUT LAKE, NILE DELTA, EGYPT SO JOURNAL OF COASTAL RESEARCH LA English DT Article DE ALEXANDRIA; BOTTOM SEDIMENTS; CARBONATE CRUSTS; EUTROPHICATION; GRAIN SIZE ANALYSIS; LAGOONS; MARIUT LAKE; NILE DELTA; POLLUTION ID LATE QUATERNARY; GYPSUM NODULES; LAGOON AB Bottom sediments in surficial and short-core samples collected in different parts of highly polluted Mariut Lake, Nile Delta, EgyPt, record th, increased anthropogenic influence during the past century. The study is based on identification of lithofacies in shot-core sections integrated with petrographic analyses of grain size and composition of the sand-size fraction in both core and surficial samples. Most Mariut lacustrine subfacies that date back to the last century me similar to those in modern Nile Delta lagoons (Idku, Burullus, Manzala), and also to older lagoon deposits examined in Holocene core sections. During this century, the lake has become artificially separated into three distinct regions, each with different petrologic attributes. These differences are a function of both natural and man-influenced factors in the three settings: sabkha-desert conditions prevail in the topographically most isolated western sector southwest of Alexandria; totally enclosed artificial salt ponds in the central sector, south of Alexandria's industrial complex, into which waters are pumped from the sea; and much lower salinity sub-basins in ea.tern Mariut which receive large, amounts of fresh water, much of it polluted, through a series of canals, sewage outfalls and drains. With time, there have been lake-wide changes such as decreased proportions of benthic fauna, including molluscs. Marked variations related to specific sub-basins include the formation of very dark, distinctly layered sediment subfacies in central Mariut, and deposits rich in bio-precipitate carbonate and plant debris in the eastern put of the lake. These latter water plant-related carbonate crusts are herein interpreted as indicators of increased pollution and eutrophication. The much increased domestic, industrial and agricultural wastes discharged into Mariut, particularly in eastern sub-basins, have serious potential consequences for the large, rapidly growing population of the Alexandria region. Closely integrated sedimentological and geochemical study of bottom sediments should be carried out to carefully monitor anthropogenic related changes. C1 SMITHSONIAN INST,MEDITERRANEAN BASIN PROGRAM,WASHINGTON,DC 20560. RP LOIZEAU, JL (reprint author), UNIV GENEVA,INST F A FOREL,CH-1290 VERSOIX,SWITZERLAND. OI Loizeau, Jean-Luc/0000-0002-0611-0388 NR 49 TC 10 Z9 10 U1 0 U2 2 PU COASTAL EDUCATION & RESEARCH FOUNDATION PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 SN 0749-0208 J9 J COASTAL RES JI J. Coast. Res. PD SPR PY 1994 VL 10 IS 2 BP 416 EP 439 PG 24 WC Environmental Sciences; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA NG933 UT WOS:A1994NG93300014 ER PT J AU BERNASCONI, MP STANLEY, DJ AF BERNASCONI, MP STANLEY, DJ TI MOLLUSCAN BIOFACIES AND THEIR ENVIRONMENTAL IMPLICATIONS, NILE DELTA LAGOONS, EGYPT SO JOURNAL OF COASTAL RESEARCH LA English DT Article DE FOSSIL RECORD; HOLOCENE SEQUENCE; BIOMARKER; LAGOONAL FACIES; DELTAIC FACIES; THANATOCOENOSES; MOLLUSCAN ASSEMBLAGE ID HOLOCENE SEQUENCES; SEDIMENTS; REGION; FAUNAS; GRAIN; LAKE AB Molluscan assemblages and their distribution in surficial sediment of Idku, Burullus and Manzala lagoons and Mariut lake in the northern Nile delta, Egypt, we defined. Quantitative analysis is performed on thanatocoenoses comprising a total of 47 species using a principal component analysis to distinguish the molluscan biofacies. Cumulative dominance values of fresh-water, lagoon sensu stricto and marine settings calculated for molluscan assemblages in each sample, reveal considerable faunal variability within and between the for Nile delta water bodies. Three molluscan biofacies are identified: those recording a marine, a fresh-water and a lagon sensu stricto influence. Biofacies indicate that, of the three lagoons, Manzala has the most fresh-water affinity and also receives the greatest incursion of marine waters via its outlet. Mariut lake biofacies, comparable to those of the Nile lagoons, likely record its history early in the last century when it was a lagoon connected to the Mediterranean. As a result of relatively high freshwater input, modern Nile molluscan biofacies comprise larger proportions of fresh-water species than in many other Mediterranean lagoons. The smaller number of molluscan biofacies and their more extensive geographic distribution in modern Nile lagoons, as compared to petrological subfacies, are a function of sediment transport-related phenomena. The results of this study are applied to the fossil record in short cores from former Abu Qir lagoon, as old as 200 years, and older Holocene sequences in the underlying northern delta. Molluscan biofacies in these older nits indicate settings that are somewhat less fresh-water and more lagoon sensu stricto influenced than those in modern Nile lagoons. Since molluscan faunas are sensitive markers of environmental conditions, it is recommended that their distributions in baseline studies be monitored in Nile delta lagoons and Mariut lake which are undergoing drastic modification by man. C1 SMITHSONIAN INST,MEDITERRANEAN BASIN PROGRAM,WASHINGTON,DC 20560. RP BERNASCONI, MP (reprint author), UNIV CALABRIA,DIPARTIMENTO SCI TERRA,I-87036 RENDE,ITALY. NR 60 TC 22 Z9 22 U1 0 U2 1 PU COASTAL EDUCATION & RESEARCH FOUNDATION PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 SN 0749-0208 J9 J COASTAL RES JI J. Coast. Res. PD SPR PY 1994 VL 10 IS 2 BP 440 EP 465 PG 26 WC Environmental Sciences; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA NG933 UT WOS:A1994NG93300015 ER PT J AU TAYLOR, PM AF TAYLOR, PM TI SUMBA BIBLIOGRAPHY - GOH,T SO JOURNAL OF SOUTHEAST ASIAN STUDIES LA English DT Book Review RP TAYLOR, PM (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SINGAPORE UNIV PRESS UNIV SINGAPORE PI SINGAPORE PA 10 KENT RIDGE CRESCENT, SINGAPORE 0511, SINGAPORE SN 0022-4634 J9 J SOUTHE ASIAN STUD JI J. Southeast Asian Stud. PD MAR PY 1994 VL 25 IS 1 BP 198 EP 199 PG 2 WC Area Studies; Asian Studies SC Area Studies; Asian Studies GA PG755 UT WOS:A1994PG75500023 ER PT J AU FROST, DF NICHOLS, DK CITINO, SB AF FROST, DF NICHOLS, DK CITINO, SB TI GASTRIC CRYPTOSPORIDIOSIS IN 2 OCELLATED LACERTAS (LACERTA-LEPIDA) SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Note DE CRYPTOSPORIDIUM; PROTOZOA; CRYPTOSPORIDIOSIS; ATROPHIC GASTRITIS; LACERTA; LACERTA LEPIDA AB An adult female ocellated lacerta (Lacerta lepida) (no. 1) presented with postprandial regurgitation and passage of undigested food in its feces. Numerous cryptosporidial oocysts were present in gastric lavage contents and feces. Although the lizard maintained a good appetite,it continued to lose weight and died 3 wk after initial presentation. At necropsy, the animal was in poor nutritional condition and had clear mucinous material throughout the intestinal tract. Histologically, there was diffuse atrophic gastritis characterized by atrophy of granular cells, mild chronic inflammation, and small numbers of intraluminal and epithelium-associated cryptosporidia. Fecal examinations and gastric lavages were conducted on the lacerta's five asymptomatic cagemates. One other lacerta, an adult female (no. 2), was identified as also being infected with cryptosporidia. Full-thickness gastric biopsies revealed that lacerta no. 2 had histologic changes that were similar to those seen in lacerta no. 1, but of a milder severity. Therapy was initiated on lacerta no. 2 with an experimental antiprotozoal drug in an attempt to clear the infection; the animal died of renal failure 9 days later. Although gastric cryptosporidiosis in snakes is characterized by proliferation of the mucosa, lesions in these two lacertas consisted of atrophic gastritis. C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. RP FROST, DF (reprint author), ARMED FORCES INST PATHOL,DEPT VET PATHOL,WASHINGTON,DC 20306, USA. NR 5 TC 11 Z9 12 U1 0 U2 2 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD MAR PY 1994 VL 25 IS 1 BP 138 EP 142 PG 5 WC Veterinary Sciences SC Veterinary Sciences GA ND166 UT WOS:A1994ND16600020 ER PT J AU TELL, L NICHOLS, DK BUSH, M AF TELL, L NICHOLS, DK BUSH, M TI CLINICAL CHALLENGE - CASE-1 - HEPATIC CHROMOBLASTOMYCOSIS WITH PROBABLE DISSEMINATION TO THE LUNG AND SKELETAL SYSTEM SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Note RP TELL, L (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 8 TC 0 Z9 1 U1 0 U2 1 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD MAR PY 1994 VL 25 IS 1 BP 173 EP 175 PG 3 WC Veterinary Sciences SC Veterinary Sciences GA ND166 UT WOS:A1994ND16600027 ER PT J AU STETTER, MD NICHOLS, D AF STETTER, MD NICHOLS, D TI CLINICAL CHALLENGE - CASE-3 - MULTIFOCAL PERIVERTEBRAL MINERALIZATION SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Note ID DEPOSITION C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20008. RP STETTER, MD (reprint author), NEW YORK ZOOL SOC,WILDLIFE CONSERVAT SOC,BRONX,NY 10460, USA. NR 6 TC 0 Z9 0 U1 0 U2 2 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD MAR PY 1994 VL 25 IS 1 BP 179 EP 180 PG 2 WC Veterinary Sciences SC Veterinary Sciences GA ND166 UT WOS:A1994ND16600029 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI SCHIELE,EGON - KALLIR,J SO LIBRARY JOURNAL LA English DT Book Review C1 NATL MUSEUM AMER ART,WASHINGTON,DC. RP KALFATOVIC, MR (reprint author), SMITHSONIAN INST,NATL PORTRAIT GALLERY LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD MAR 1 PY 1994 VL 119 IS 4 BP 86 EP 86 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MY611 UT WOS:A1994MY61100041 ER PT J AU RILEY, S AF RILEY, S TI DOGS - WALLACECRABBE,R SO LIBRARY JOURNAL LA English DT Book Review RP RILEY, S (reprint author), SMITHSONIAN INST LIBS,WASHINGTON,DC, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD MAR 1 PY 1994 VL 119 IS 4 BP 121 EP 121 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MY611 UT WOS:A1994MY61100205 ER PT J AU PURCELL, JE WHITE, JR ROMAN, MR AF PURCELL, JE WHITE, JR ROMAN, MR TI PREDATION BY GELATINOUS ZOOPLANKTON AND RESOURCE LIMITATION AS POTENTIAL CONTROLS OF ACARTIA-TONSA COPEPOD POPULATIONS IN CHESAPEAKE BAY SO LIMNOLOGY AND OCEANOGRAPHY LA English DT Article ID PARTIALLY STRATIFIED ESTUARY; NARRAGANSETT BAY; EGG-PRODUCTION; CALANOID COPEPOD; RHODE-ISLAND; CHRYSAORA-QUINQUECIRRHA; PLANKTONIC COPEPOD; MNEMIOPSIS-LEIDYI; FOOD LIMITATION; BOTTOM-UP AB Gelatinous zooplankton are conspicuous predators during summer in Chesapeake Bay. Inverse correlations of the abundances of gelatinous predators and their zooplankton prey have led to speculation that these predators may control their prey populations. We measured predation on copepods by hydromedusae, scyphomedusae. and ctenophores in the mesohaline region of the bay in May-October 1987 and 1988. We simultaneously assessed the possibility of food limitation in Acartia tonsa by measuring its phyto- and microzooplankton food resources and rates of adult female egg production. We conclude that A. tonsa populations are not limited by gelatinous zooplankton predation and rarely by food. Other predators (e.g. fish, adult copepods) and environmental limitations (e.g. temperature. hypoxic bottom waters) probably affect A. tonsa abundances in this region. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RP PURCELL, JE (reprint author), HORN POINT ENVIRONM LABS,POB 775,CAMBRIDGE,MD 21613, USA. RI Purcell, Jennifer/E-9991-2011; roman, michael/F-9425-2013 NR 51 TC 92 Z9 95 U1 0 U2 12 PU AMER SOC LIMNOLOGY OCEANOGRAPH PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044-8897 SN 0024-3590 J9 LIMNOL OCEANOGR JI Limnol. Oceanogr. PD MAR PY 1994 VL 39 IS 2 BP 263 EP 278 PG 16 WC Limnology; Oceanography SC Marine & Freshwater Biology; Oceanography GA NM679 UT WOS:A1994NM67900005 ER PT J AU GUZMAN, HM BURNS, KA JACKSON, JBC AF GUZMAN, HM BURNS, KA JACKSON, JBC TI INJURY, REGENERATION AND GROWTH OF CARIBBEAN REEF CORALS AFTER A MAJOR OIL-SPILL IN PANAMA SO MARINE ECOLOGY PROGRESS SERIES LA English DT Article DE CHRONIC CONTAMINATION; CORAL REEF; HYDROCARBONS; OIL SPILL; RECOVERY; STRESS; SUBLETHAL EFFECTS ID BUILDING CORALS; COMMUNITIES; POLLUTION; SIZE AB We studied effects of a major oil spill in Panama on injury, regeneration and growth of subtidal reef corals over 5 yr. Corals exhibited much higher levels of injury, faster regeneration rates and slower growth on heavily oiled reefs. Concentrations of hydrocarbons in reef sediments were significantly positively correlated with amounts of coral injury and significantly negatively correlated with coral growth. The probable cause of persistently high levels of coral injury is chronic exposure to sediments mixed with partially degraded oil that are exported from mangroves onto adjacent reefs. Injury apparently results in a reallocation of resources to regeneration and consequently decreased investment in fecundity and growth. There was no evidence of coral recovery 5 yr after the oil spill. C1 BERMUDA BIOL STN RES INC, FERRY REACH GE 01, BERMUDA. RP GUZMAN, HM (reprint author), SMITHSONIAN TROP RES INST, BOX 2072, BALBOA, PANAMA. RI kohki, sowa/D-2955-2011 NR 40 TC 61 Z9 64 U1 0 U2 37 PU INTER-RESEARCH PI OLDENDORF LUHE PA NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY SN 0171-8630 J9 MAR ECOL PROG SER JI Mar. Ecol.-Prog. Ser. PD MAR PY 1994 VL 105 IS 3 BP 231 EP 241 DI 10.3354/meps105231 PG 11 WC Ecology; Marine & Freshwater Biology; Oceanography SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography GA NA721 UT WOS:A1994NA72100003 ER PT J AU PETAEV, MI BARSUKOVA, LD LIPSCHUTZ, ME WANG, MS ARISKIN, AA CLAYTON, RN MAYEDA, TK AF PETAEV, MI BARSUKOVA, LD LIPSCHUTZ, ME WANG, MS ARISKIN, AA CLAYTON, RN MAYEDA, TK TI THE DIVNOE METEORITE - PETROLOGY, CHEMISTRY, OXYGEN ISOTOPES AND ORIGIN SO METEORITICS LA English DT Article ID PARENT BODY; SYSTEM MG2SIO4-FE2SIO4; SHOCK METAMORPHISM; MODIFIED SPINEL; TRANSFORMATION; (MG,FE)2SIO4; TRANSITIONS; PETROGRAPHY; ACHONDRITE; FE)2SIO4 AB The Divnoe meteorite is an olivine-rich primitive achondrite with subchondritic chemistry and mineralogy. It has a granoblastic, coarse-grained, olivine groundmass (CGL: coarse-grained lithology) with relatively large pyroxene-plagioclase poikilitic patches (PP) and small fine-grained domains of an opaque-rich lithology (ORL). Both PP and ORL are inhomogeneously distributed and display reaction boundaries with the groundmass. Major silicates, olivine (Fa20-28) and orthopyroxene (Fs20-28Wo0.5-2.5), display systematic differences in composition between CGL and ORL as well as a complicated pattern of variations within CGL. Accessory plagioclase has low K content and displays regular igneous zoning with core compositions An40-45 and rims An32-37. The bulk chemical composition of Divnoe is similar to that of olivine-rich primitive achondrites, except for a depletion of incompatible elements and minor enrichment of refractory siderophiles. Oxygen isotope compositions for whole-rock and separated minerals from Divnoe fall in a narrow range, with mean deltaO-18 = +4.91, deltaO-17 = +2.24, and DELTAO-17 = -0.26 +/- 0.11. The isotopic composition is not within the range of any previously recognized group but is very close to that of the brachinites. To understand the origin of Divnoe lithologies, partial melting and crystallization were modelled using starting compositions equal to that of Divnoe and some chondritic meteorites. It was found that the Divnoe composition could be derived from a chondritic source region by approximately 20 wt% partial melting at T almost-equal-to 1300-degrees-C and log(fO2) = IW-1.8, followed by approximately 60 wt% crystallization of the partial melt formed, and removal of the still-liquid portion of the partial melt. Removal of the last partial melt resulted in depletion of the Divnoe plagioclase in Na and K. In this scenario, CGL represents the residue of partial melting, and PP is a portion of the partial melt that crystallized in situ. The ORL was formed during the final stages of partial melting by reaction between gaseous sulfur and residual olivine in the source region. A prominent feature of Divnoe is fine mum-scale chemical variations within olivine grains, related to lamellar structures the olivines display. The origin of these structures is not known. C1 UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637. PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. VI GEOCHEM & ANALY CHEM INST,MOSCOW 117195,RUSSIA. RP PETAEV, MI (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 57 TC 30 Z9 30 U1 0 U2 1 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD MAR PY 1994 VL 29 IS 2 BP 182 EP 199 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA ND202 UT WOS:A1994ND20200007 ER PT J AU BRAITHWAITE, RSW DUNN, PJ PRITCHARD, RG PAAR, WH AF BRAITHWAITE, RSW DUNN, PJ PRITCHARD, RG PAAR, WH TI IOWAITE, A REINVESTIGATION SO MINERALOGICAL MAGAZINE LA English DT Article DE IOWAITE; PYROAURITE; PALABORA MINE; TRANSVAAL ID HYDROXIDE MINERALS AB Iowaite has been re-examined using new, well crystallized material from the Palabora open pit mine, Transvaal. Microprobe, carbon analyser and thermal analyses, powder and single-crystal X-ray diffraction, infrared, UV-visible and mass spectroscopic and optical studies were made. The ideal formula is Mg6Fe2(III)(OH)16Cl2.4H2O. It is trigonal, R3mBAR, a = 3.1183(9), c = 24.113(8) angstrom, V = 203.1(2) angstrom3, Z = 3/8; D(obs) 2.09 g/cm3; D(calc) 2.04 g/cm3; hardness (Mohs) = 2 1/2. The interlayer Cr ions are displaced from the threefold axis. It is uniaxial negative, with omega = 1.561 +/- 0.002, epsilon = 1.543 +/- 0.002; coloured crystals are intensely pleochroic, due to intervalence charge transfer between the Fe3+ and Fe2+ substituting for Mg2+, with O pale yellow, E deep blue-green. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. SALZBURG UNIV,INST MINERAL,A-5020 SALZBURG,AUSTRIA. RP BRAITHWAITE, RSW (reprint author), UNIV MANCHESTER,INST SCI & TECHNOL,DEPT CHEM,MANCHESTER M60 1QD,LANCS,ENGLAND. NR 17 TC 29 Z9 29 U1 1 U2 7 PU MINERALOGICAL SOCIETY PI LONDON PA 41 QUEENS GATE, LONDON, ENGLAND SW7 5HR SN 0026-461X J9 MINERAL MAG JI Mineral. Mag. PD MAR PY 1994 VL 58 IS 390 BP 79 EP 85 DI 10.1180/minmag.1994.058.390.08 PG 7 WC Mineralogy SC Mineralogy GA MX634 UT WOS:A1994MX63400008 ER PT J AU SAENZ, GS TAYLOR, JW GARGAS, A AF SAENZ, GS TAYLOR, JW GARGAS, A TI 18S RIBOSOMAL-RNA GENE-SEQUENCES AND SUPRAORDINAL CLASSIFICATION OF THE ERYSIPHALES SO MYCOLOGIA LA English DT Article DE BLUMERIA-GRAMINIS F-SP HORDEI; ERYSIPHALES; MOLECULAR EVOLUTION; POWDERY MILDEWS; 18S RDNA ID DNA-SEQUENCE AB The Erysiphales (powdery mildews) exhibit conflicting morphologies and have been classified as either Pyrenomycetes or Plectomycetes. The nuclear small subunit ribosomal RNA gene was sequenced for two isolates of Blumeria graminis forma speciales hordei in order to help resolve this classification controversy. A single most parsimonious tree was obtained grouping the Erysiphales with neither the Plectomycetes nor the Pyrenomycetes, but rather placing the powdery mildews in amongst a basal assemblage of apothecial and pseudothecial fungi. Maximum likelihood tests were conducted on constraint trees exhibiting three possible morphological classifications. The results rejected the placement of the Erysiphales amongst both the Plectomycetes and Pyrenomycetes but could not reject placement amongst the Discomycetes; therefore, the powdery mildews are not Pyrenomycetes nor Plectomycetes. However, higher order classification of the Erysiphales remains unresolved, since there is no strong bootstrap support for the Erysiphales amongst the basal assemblage of apothecial and pseudothecial fungi. C1 SMITHSONIAN INST,DEPT BOT,WASHINGTON,DC 20560. RP SAENZ, GS (reprint author), UNIV CALIF BERKELEY,DEPT PLANT BIOL,BERKELEY,CA 94720, USA. NR 19 TC 39 Z9 42 U1 2 U2 4 PU NEW YORK BOTANICAL GARDEN PI BRONX PA PUBLICATIONS DEPT, BRONX, NY 10458 SN 0027-5514 J9 MYCOLOGIA JI Mycologia PD MAR-APR PY 1994 VL 86 IS 2 BP 212 EP 216 DI 10.2307/3760639 PG 5 WC Mycology SC Mycology GA NL770 UT WOS:A1994NL77000007 ER PT J AU ZEH, JA ZEH, DW AF ZEH, JA ZEH, DW TI TROPICAL LIAISONS ON A BEETLES BACK SO NATURAL HISTORY LA English DT Article C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. UNIV HOUSTON,DEPT BIOL,HOUSTON,TX 77004. NR 0 TC 5 Z9 6 U1 0 U2 1 PU AMER MUSEUM NAT HISTORY PI NEW YORK PA ATTN: LIBRARY SERIALS UNIT CENTRAL PK WEST AT 79TH ST, NEW YORK, NY 10024-5192 SN 0028-0712 J9 NAT HIST JI Nat. Hist. PD MAR PY 1994 VL 103 IS 3 BP 36 EP 43 PG 8 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA MY902 UT WOS:A1994MY90200007 ER PT J AU ZOTZ, G WINTER, K AF ZOTZ, G WINTER, K TI ANNUAL CARBON BALANCE AND NITROGEN-USE EFFICIENCY IN TROPICAL C-3 AND CAM EPIPHYTES SO NEW PHYTOLOGIST LA English DT Article DE CRASSULACEAN ACID METABOLISM; CARBON BALANCE; EPIPHYTES; NITROGEN-USE EFFICIENCY; TROPICAL RAIN FOREST ID CRASSULACEAN ACID METABOLISM; VASCULAR EPIPHYTES; CHLOROPHYLL FLUORESCENCE; CATASETUM-VIRIDIFLAVUM; CO2 FIXATION; GAS-EXCHANGE; PHOTOSYNTHESIS; CLUSIA; ECOPHYSIOLOGY; BROMELIACEAE AB Over the course of 12 months, diel (24 h) measurements of gas exchange were performed on leaves of three epiphytic species growing in the crown of a kapok tree on Barro Colorado Island, Panama: a drought-deciduous orchid with the C-2 pathway (Catasetum viridiflavum Hook.), an evergreen C-3 fern (Polypodium crassifolium L.), and an evergreen epiphyte with an intermediate C-3-CAM pathway of photosynthesis (Clusia uvitana Pitt.). The gas exchange characteristics of all three species were strongly affected during the four-month dry season. Compared with the rainy season, mean daily carbon gain of Clusia uvitana was reduced by almost 40%, paralleled by a strong decrease in daytime CO2 uptake and an increase in CO2 uptake at night. The orchid, growing new leaves in the second half of the dry season, showed markedly decreased stomatal conductances and greatly reduced carbon gain. In the fern, daily carbon balance became negative during the dry season and chronic photoinhibition was indicated by reduced F-V/F-M ratios and a decreased photon-use efficiency of photosynthetic 0(2) evolution. Annual carbon gain was similar for the three species (about 1000 g CO2 m(-2) yr(-1)) as was long-term nitrogen-use efficiency (annual carbon gain/mean leaf nitrogen content, about 1.1 g CO2 mg N-1 yr(-1)). In the C-3-CAM epiphyte, the long-term water use efficiency of net CO2 uptake was more than twice as high as in the two C-3 epiphytes. RP ZOTZ, G (reprint author), SMITHSONIAN TROP RES INST,POB 2072,BALBOA,PANAMA. NR 42 TC 38 Z9 41 U1 0 U2 17 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD MAR PY 1994 VL 126 IS 3 BP 481 EP 492 DI 10.1111/j.1469-8137.1994.tb04245.x PG 12 WC Plant Sciences SC Plant Sciences GA NG798 UT WOS:A1994NG79800004 ER PT J AU ADAMS, ES AF ADAMS, ES TI TERRITORY DEFENSE BY THE ANT AZTECA-TRIGONA - MAINTENANCE OF AN ARBOREAL ANT MOSAIC SO OECOLOGIA LA English DT Article DE ANTS; TERRITORIALITY; AZTECA; PHEROMONES ID GHANA COCOA FARMS; OECOPHYLLA-LONGINODA LATREILLE; PAPUA-NEW-GUINEA; HYMENOPTERA-FORMICIDAE; RELATIVE DISTRIBUTIONS; WHEELER HYMENOPTERA; ORGANIZATION; RECRUITMENT; BEHAVIOR; IDENTIFICATION AB Mosaics of exclusive foraging territories, produced by intra- and interspecific competition, are commonly reported from arboreal ant communities throughout the tropics and appear to represent a recurring feature of community organization. This paper documents an ant mosaic within mangrove forests of Panama and examines the behavioral mechanisms by which one of the common species, Azteca trigona, maintains its territories. Most of the mangrove canopy is occupied by mutually exclusive territories of the ants A. trigona, A. velox, A. instabilis, and Crematogaster brevispinosa. When foraging workers of A. trigona detect workers of these territorial species, they organize an alarm recruitment response using pheromonal and tactile displays. Nestmates are attracted over short distances by an alarm pheromone originating in the pygidial gland and over longer distances by a trail pheromone produced by the Pavan's gland. Recruits are simultaneously alerted by a tactile display. No evidence was found for chemical marking of the territory. Major workers are proportionally more abundant at territory borders than on foraging trails in the interior of the colony. The mechanisms of territory defense in A. trigona are remarkably similar to those of ecologically analogous ants in the Old World tropics. C1 SMITHSONIAN TROP RES INST,APO,MIAMI,FL 34002. UNIV CALIF BERKELEY,DEPT ZOOL,BERKELEY,CA 94720. NR 44 TC 66 Z9 66 U1 3 U2 34 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD MAR PY 1994 VL 97 IS 2 BP 202 EP 208 DI 10.1007/BF00323150 PG 7 WC Ecology SC Environmental Sciences & Ecology GA ND520 UT WOS:A1994ND52000007 PM 28313929 ER PT J AU DIMICHELE, WA AF DIMICHELE, WA TI ECOLOGICAL PATTERNS IN TIME AND SPACE SO PALEOBIOLOGY LA English DT Editorial Material ID COMMUNITIES; VEGETATION; EVOLUTION RP DIMICHELE, WA (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT PALEOBIOL,WASHINGTON,DC 20560, USA. RI DiMichele, William/K-4301-2012 NR 26 TC 42 Z9 43 U1 0 U2 4 PU PALEONTOLOGICAL SOC INC PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044 SN 0094-8373 J9 PALEOBIOLOGY JI Paleobiology PD SPR PY 1994 VL 20 IS 2 BP 89 EP 92 PG 4 WC Biodiversity Conservation; Ecology; Evolutionary Biology; Paleontology SC Biodiversity & Conservation; Environmental Sciences & Ecology; Evolutionary Biology; Paleontology GA NU534 UT WOS:A1994NU53400001 ER PT J AU OLIVER, WA PEDDER, AEH AF OLIVER, WA PEDDER, AEH TI CRISES IN THE DEVONIAN HISTORY OF THE RUGOSE CORALS SO PALEOBIOLOGY LA English DT Article ID MASS EXTINCTION; CORALS; EVENT AB Detailed analysis of the stratigraphic ranges of Devonian rugose coral genera within the Old World and Eastern Americas Realms gives new information on faunal extinctions and other bioevents in both rearms. Various origination and extinction metrics are calculated from tabulations of occurrences in each stage. The most significant faunal changes were near or at the ends of the Lochkovian and Frasnian stages. The former marks the gradual transition from dominance by Silurian families and genera to the characteristic Devonian coral assemblages; the latter marks the virtual extinction of the Devonian families and genera. Other coral events are related to the two major changes. The data provide new bases for comparing the histories of the two realms. Most of the events are recorded in both, giving support to previous suggestions that the causes were worldwide. The coral record shows an increase (probably episodic) in environmental deterioration persisting through the Middle Devonian and culminating in extinction at the end of the Frasnian. Eustatic sea level fluctuations may have caused the precursor events and a bolide impact may have caused the end-Frasnian extinction. C1 GEOL SURVEY CANADA,CALGARY T2L 2A7,AB,CANADA. RP OLIVER, WA (reprint author), US GEOL SURVEY,SMITHSONIAN INST,NATL MUSEUM NAT HIST E205,WASHINGTON,DC 20560, USA. NR 41 TC 29 Z9 33 U1 1 U2 3 PU PALEONTOLOGICAL SOC INC PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044 SN 0094-8373 J9 PALEOBIOLOGY JI Paleobiology PD SPR PY 1994 VL 20 IS 2 BP 178 EP 190 PG 13 WC Biodiversity Conservation; Ecology; Evolutionary Biology; Paleontology SC Biodiversity & Conservation; Environmental Sciences & Ecology; Evolutionary Biology; Paleontology GA NU534 UT WOS:A1994NU53400005 ER PT J AU CULLEN, JJ NEALE, PJ AF CULLEN, JJ NEALE, PJ TI ULTRAVIOLET-RADIATION, OZONE DEPLETION, AND MARINE PHOTOSYNTHESIS SO PHOTOSYNTHESIS RESEARCH LA English DT Review DE PHYTOPLANKTON; PRIMARY PRODUCTION; GROWTH; ACTION SPECTRUM; BIOGEOCHEMICAL CYCLING ID UV-B RADIATION; OCEANIC PRIMARY PRODUCTION; REACTION CENTER PROTEIN; PHYTOPLANKTON PHOTOSYNTHESIS; ANACYSTIS-NIDULANS; GONYAULAX-POLYEDRA; MICROALGAL GROWTH; EUGLENA-GRACILIS; NATURAL-WATERS; ACTION SPECTRA AB Concerns about stratospheric ozone depletion have stimulated interest in the effects of UVB radiation (280-320 nm) on marine phytoplankton. Research has shown that phytoplankton photosynthesis can be severely inhibited by surface irradiance and that much of the effect is due to UV radiation. Quantitative generalization of these results requires a biological weighting function (BWF) to quantify UV exposure appropriately. Different methods have been employed to infer the general shape of the BWF for photoinhibition in natural phytoplankton, and recently, detailed BWFs have been determined for phytoplankton cultures and natural samples. Results show that although UVB photons are more damaging than UVA (320-400 nm), the greater fluxes of UVA in the ocean cause more UV inhibition. Models can be used to analyze the sensitivity of water column productivity to UVB and ozone depletion. Assumptions about linearity and time-dependence strongly influence the extrapolation of results. Laboratory measurements suggest that UV inhibition can reach a steady-state consistent with a balance between damage and recovery processes, leading to a non-linear relationship between weighted fluence rate and inhibition. More testing for natural phytoplankton is required, however. The relationship between photoinhibition of photosynthesis and decreases in growth rate is poorly understood, so long-term effects of ozone depletion are hard to predict. However, the wide variety of sensitivities between species suggests that some changes in species composition are likely. Predicted effects of ozone depletion on marine photosynthesis cannot be equated to changes in carbon flux between the atmosphere and ocean. Nonetheless, properly designed studies on the effects of UVB can help identify which physiological and ecological processes are most likely to dominate the responses of marine ecosystems to ozone depletion. C1 BIGELOW LAB OCEAN SCI,BOOTHBAY HARBOR,ME 04575. SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RP CULLEN, JJ (reprint author), DALHOUSIE UNIV,DEPT OCEANOG,HALIFAX B3H 4J1,NS,CANADA. RI Cullen, John/B-6105-2008; Neale, Patrick/A-3683-2012; Strid, Ake/E-5309-2012 OI Cullen, John/0000-0002-7740-0999; Strid, Ake/0000-0003-3315-8835 NR 109 TC 148 Z9 155 U1 4 U2 17 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PD MAR PY 1994 VL 39 IS 3 BP 303 EP 320 DI 10.1007/BF00014589 PG 18 WC Plant Sciences SC Plant Sciences GA NP930 UT WOS:A1994NP93000006 PM 24311127 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI EDIBLE PLANTS AND ANIMALS - UNUSUAL FOODS FROM AARDVARK TO ZAMIA - LIVINGSTON,AD, LIVINGSTON,H SO RQ LA English DT Book Review RP KALFATOVIC, MR (reprint author), SMITHSONIAN INST LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER LIBRARY ASSN PI CHICAGO PA 50 E HURON ST, CHICAGO, IL 60611 SN 0033-7072 J9 RQ JI RQ PD SPR PY 1994 VL 33 IS 3 BP 414 EP 414 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA NJ635 UT WOS:A1994NJ63500020 ER PT J AU ARNDT, MB HABBAL, SR KAROVSKA, M AF ARNDT, MB HABBAL, SR KAROVSKA, M TI THE DISCRETE AND LOCALIZED NATURE OF THE VARIABLE EMISSION FROM ACTIVE REGIONS SO SOLAR PHYSICS LA English DT Article ID CORONAL BRIGHT POINTS; TEMPORAL VARIATIONS; X-RAY; SPECTRO-HELIOMETER; MAGNETIC-FIELD; QUIET-SUN; LOOPS AB Using data from the Extreme Ultraviolet (EUV) Spectroheliometer on Skylab, we study the empirical characteristics of the variable emission in active regions. These simultaneous multiwavelength observations clearly confirm that active regions consist of a complex of loops at different temperatures. The variable emission from this complex has very well-defined properties that can be quantitatively summarized as follows: (1) It is localized predominantly around the footpoints where it occurs at discrete locations. (2) The strongest variability does not necessarily coincide with the most intense emission. (3) The fraction of the area of the footpoints, deltan/N, that exhibits variable emission, varies by +/-15% as a function of time, at any of the wavelengths measured. It also varies very little from footpoint to footpoint. (4) This fractional variation is temperature dependent with a maximum around 10(5) K. (5) The ratio of the intensity of the variable to the average background emission, deltaI/IBAR, also changes with temperature. In addition, we find that these distinctive characteristics persist even when flares occur within the active region. RP ARNDT, MB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 25 TC 9 Z9 9 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD MAR PY 1994 VL 150 IS 1-2 BP 165 EP 178 DI 10.1007/BF00712884 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NF002 UT WOS:A1994NF00200012 ER PT J AU LAYBOURNE, RC DEEDRICK, DW HUEBER, FM AF LAYBOURNE, RC DEEDRICK, DW HUEBER, FM TI FEATHER IN AMBER IS EARLIEST NEW-WORLD FOSSIL OF PICIDAE SO WILSON BULLETIN LA English DT Article AB Two pieces of amber containing portions of feathers were obtained from the Dominican Republic. Only one feather was preserved in such a way that it showed diagnostic characters. By comparing the plumulaceous barbules of the fossil with several species of non-passerines, the fossil was identified as a member of the family Picidae. Further comparisons indicate that the fossil was related closely to the Antillean Piculet (Nesoctites micromegas). This confirms a long presence of birds similar to Nesoctites on Hispaniola and documents the earliest New World fossil of Picidae. C1 FED BUR INVEST,HAIRS & FIBERS UNIT,WASHINGTON,DC 20535. SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560. RP LAYBOURNE, RC (reprint author), SMITHSONIAN INST,DEPT VERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 7 TC 16 Z9 20 U1 0 U2 2 PU WILSON ORNITHOLOGICAL SOC PI ANN ARBOR PA MUSEUM OF ZOOLOGY UNIV MICHIGAN, ANN ARBOR, MI 48109 SN 0043-5643 J9 WILSON BULL JI Wilson Bull. PD MAR PY 1994 VL 106 IS 1 BP 18 EP 25 PG 8 WC Ornithology SC Zoology GA MZ290 UT WOS:A1994MZ29000002 ER PT J AU JAMIESON, MJ COOPER, DL ZYGELMAN, B AF JAMIESON, MJ COOPER, DL ZYGELMAN, B TI VIBRATIONAL LEVELS IN THE N-4++H CHARGE-TRANSFER SYSTEM SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Letter ID ATOMIC-HYDROGEN AB The energies of bound vibrational levels supported by the attractive potential well in the interaction of a neutral hydrogen atom and a multiply charged nitrogen atom am calculated in the diabatic representation. Their rates of depopulation through predissociation to other ion-ion channels are evaluated and compared with the rate of spontaneous emission. RP JAMIESON, MJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 4 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD FEB 28 PY 1994 VL 27 IS 4 BP L73 EP L78 DI 10.1088/0953-4075/27/4/002 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA NA264 UT WOS:A1994NA26400002 ER PT J AU KOCHANEK, CS AF KOCHANEK, CS TI THE AFTERMATH OF TIDAL DISRUPTION - THE DYNAMICS OF THIN GAS STREAMS SO ASTROPHYSICAL JOURNAL LA English DT Article DE BLACK HOLE PHYSICS; GALAXIES, ACTIVE; HYDRODYNAMICS ID MASSIVE BLACK-HOLE; AFFINE STAR MODEL; GALAXIES; CAPTURE; QSOS; EVOLUTION; STABILITY; BINARIES; DISKS AB We study the hydodynamics of the gas stream created from the debris of a star disrupted by the tides of a massive black hole. The circularization and accretion of the debris orbits depends on the transverse structure of the stream because the stream cross section determines the effectiveness of energy and angular momentum transfers. The transverse structure is modified by crossing points in the stream where orbits are focused across the stream center or through the orbital plane, the velocity shear across the stream, self-gravity (in the more distant encounters), recombination, shocks, and shear viscosity. During the first several orbits it is insensitive to the ambient medium and the luminosity of the active galactic nucleus. Stream-stream collisions may have a weak effect on the orbits because of Lense-Thirring precession, mismatched geometric cross sections, and the kinematics of collisions. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS-51,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 38 TC 73 Z9 73 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 1994 VL 422 IS 2 BP 508 EP 520 DI 10.1086/173745 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ636 UT WOS:A1994MZ63600008 ER PT J AU CIMATTI, A ALIGHIERI, SD FIELD, GB FOSBURY, RAE AF CIMATTI, A ALIGHIERI, SD FIELD, GB FOSBURY, RAE TI STELLAR AND SCATTERED-LIGHT IN A RADIO GALAXY AT Z=2.631 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (MRC 2025-218); GALAXIES, ISM; POLARIZATION; RADIO CONTINUUM, GALAXIES; RELATIVITY ID NAMBU-GOLDSTONE BOSON; HIGH-REDSHIFT; ELECTROMAGNETIC PROPAGATION; OPTICAL MORPHOLOGIES; ELECTRON-SCATTERING; LINEAR-POLARIZATION; ALIGNMENT; QUASARS; CATALOG; SCALAR AB We present the results of optical imaging polarimetry of a radio galaxy at z = 2.63. High linear polarization (P = 8.3 +/- 2.3%) is measured in the rest frame UV continuum between 1600 and 2100 angstrom. The orientation of the electic vector is perpendicular to the UV and Lyalpha axis and, as for the other known polarized distant radio galaxies, scattering of anisotropic nuclear radiation is the favored polarization mechanism. We discuss modeling of the observed degree of polarization and of the spectral energy distribution of the galaxy as given by optical and infrared photometry, with evolved stars, young stars, anisotropic nuclear light scattered by dust or electrons, and direct nuclear radiation. The presence of the scattered component is required by the high UV polarization. Nevertheless it is not possible to exclude young stars or direct nuclear radiation solely on the basis of the photometric fitting. Also an evolved stellar population is necessary to explain the infrared colors. We discuss a possible test of the Einstein equivalence principle and of the presence of a light pseudoscalar boson based on the preservation of photon polarization orientation over large distances. C1 OSSERV ASTROFIS ARCETRI,I-50125 FLORENCE,ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SPACE TELESCOPE EUROPEAN COORDINATING FACIL,W-8046 GARCHING,GERMANY. RP CIMATTI, A (reprint author), EUROPEAN SO OBSERV,KARL SCHWARZSCHILD STR 2,W-8046 GARCHING,GERMANY. RI di Serego Alighieri, Sperello/E-4067-2010 OI di Serego Alighieri, Sperello/0000-0001-8769-2692 NR 52 TC 45 Z9 45 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 1994 VL 422 IS 2 BP 562 EP 569 DI 10.1086/173749 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ636 UT WOS:A1994MZ63600012 ER PT J AU ARGON, AL GREENHILL, LJ MORAN, JM REID, MJ MENTEN, KM HENKEL, C INOUE, M AF ARGON, AL GREENHILL, LJ MORAN, JM REID, MJ MENTEN, KM HENKEL, C INOUE, M TI THE ANGULAR STRUCTURE AND INTRADAY VARIABILITY OF A WATER-VAPOR MASER IN IC-10 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (IC 10); GALAXIES, ISM; MASERS ID DWARF IRREGULAR GALAXIES; STAR-FORMING REGIONS; ASTRONOMICAL MASERS; HYDROXYL MASERS; PROPER MOTIONS; H2O MASERS; EMISSION; FLUCTUATIONS; EVOLUTION; NGC-3079 AB The water vapor maser associated with the southeastern nucleus of the irregular galaxy IC 10 has been observed with a six-station intercontinental VLBI array over 3 epochs spanning the period 1990 November to 1991 November. The absolute position of the maser and the relative positions of six spectral features were measured. These features are all unresolved and smaller than approximately 10(13) cm (based on a distance of 1.25 Mpc) and have brightness temperatures greater than 3 x 10(13) K. The angular distribution of features indicates a region of activity approximately 0.06 pc across. Features of disparate velocity are also clustered on a scale of 10(15) cm, similar to Galactic masers. We found that the brightest spectral feature reached an integrated luminosity of approximately 0.4 L., assuming isotropic emission of radiation. Single-dish observations made in late 1922 and early 1993 suggest that this feature has recently become much stronger, with an integrated luminosity approaching 3 L.. In addition, we found that one of the features decreased by approximately 60% in flux density over an interval of 17 hr during our VLBI experiment. This is the first intraday variation of an H2O maser witnessed at many telescopes simultaneously. Systematic, although less dramatic variations were observed on timescales of approximately 1 hr. Separate VLA observations show that the maser is coincident with a radio continuum source that is smaller than 0.6 pc. We discuss the constraints on possible emission mechanisms imposed by the high luminosity and rapid time variability. We also show that the intraday variation could have been caused by an extreme scattering event due to a cloud in the Galactic ISM. C1 MAX PLANCK INST RADIOASTRON,W-5300 BONN 1,GERMANY. NOBEYAMA RADIO OBSERV,MINAMISA,NAGANO 38413,JAPAN. RP ARGON, AL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 45 TC 18 Z9 18 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 1994 VL 422 IS 2 BP 586 EP 596 DI 10.1086/173751 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MZ636 UT WOS:A1994MZ63600014 ER PT J AU ZIMMERMANN, HU LEWIN, W PREDEHL, P ASCHENBACH, B FABBIANO, G HASINGER, G LUBIN, L MAGNIER, E VANPARADIJS, J PETRE, R PIETSCH, W TRUMPER, J AF ZIMMERMANN, HU LEWIN, W PREDEHL, P ASCHENBACH, B FABBIANO, G HASINGER, G LUBIN, L MAGNIER, E VANPARADIJS, J PETRE, R PIETSCH, W TRUMPER, J TI DETECTION OF SOFT X-RAYS FROM SUPERNOVA 1993J 6 DAYS AFTER OUTBURST SO NATURE LA English DT Article AB ON 28 March 1993, a new supernova was discovered(1) in the nearby galaxy M81. The proximity of the event (the distance(2) to M81 is only 3.6 Mpc), and the fact that the supernova was detected at an early stage of its outburst(3), makes SN1993J an ideal candidate for the detailed study of the evolution of a supernova in all wavelength regimes. We report here the detection of soft X-ray emissions from SN1993J, six days after the initial discovery, and the subsequent evolution of the X-ray light curve over the next 41 days. The spectral characteristics of the emissions can be readily explained if the X-rays originate in strong shock fronts produced by the rapid expansion of the supernova ejecta into the slow, dense wind of a red supergiant progenitor star(4). The low intrinsic absorption of the earliest emissions requires that any circumstellar material is ionized, probably by the intense radiation of the initial outburst. The decay of the X-ray luminosity with time should provide important constraints on the density profiles of both the circumstellar gas and the outermost layers of the supernova ejecta. C1 MIT,CTR SPACE RES,CAMBRIDGE,MA 02139. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. PRINCETON UNIV OBSERV,PRINCETON,NJ 08544. UNIV AMSTERDAM,ASTRON INST ANTON PANNEKOEK,1098 SJ AMSTERDAM,NETHERLANDS. CTR HIGH ENERGY ASTROPHYS,1098 SJ AMSTERDAM,NETHERLANDS. GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP ZIMMERMANN, HU (reprint author), MAX PLANCK INST EXTRATERR PHYS,POSTFACH 1603,D-85740 GARCHING,GERMANY. NR 17 TC 59 Z9 59 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 17 PY 1994 VL 367 IS 6464 BP 621 EP 623 DI 10.1038/367621a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MW688 UT WOS:A1994MW68800045 ER PT J AU WILLIS, BJ BEHRENSMEYER, AK AF WILLIS, BJ BEHRENSMEYER, AK TI ARCHITECTURE OF MIOCENE OVERBANK DEPOSITS IN NORTHERN PAKISTAN SO JOURNAL OF SEDIMENTARY RESEARCH SECTION B-STRATIGRAPHY AND GLOBAL STUDIES LA English DT Article ID ALLUVIAL PALEOSOLS; FLOODPLAIN SUITES; INTEGRATION; SEQUENCES; AVULSION; CHANNEL AB Understanding the geometry of sediment bodies and patterns of sediment disruption in ancient fluvial overbank successions is fundamental to interpretations of overbank deposition. Overbank deposits of the fluvial Chinji Formation (Siwalik Group) can be divided into sequences 1-20 m thick defined by the alternation of stratified sediments and paleosols. Preservation of stratified sequences does not support a gradual vertical aggradation of overbank sediments over the extent of the floodplain, but instead indicates periods of rapid sediment deposition followed by long hiatuses and soil development. Rapid deposition of overbank sequences is predicted by models that hypothesize: (1) episodic vertical aggradation of the entire floodplain, (2) deposition controlled by the growth of alluvial ridges, (3) incision and filling of local valleys, (4) rapid filling of localized low areas, or (5) rapid deposition associated with river-channel avulsion. These models also have important implications for understanding fossil preservation and floodplain paleoecology. Paleosol-bounded sequences in the Chinji Formation can pinch out laterally over kilometers, indicating that episodes of rapid deposition were restricted to local areas on the floodplain. There is no evidence that bases of sequences are erosional, and they do not appear to record valley incision and filling. Sequences generally do not thin and fine systematically away from the terminating margins of major channel deposits, suggesting they are not related to the growth of alluvial ridges along active channels. Lithologic variations and patterns of sediment disruption within sequences appear to reflect the rapid filling of low areas on the floodplain both adjacent to and distal from the major river channel. This infilling of floodplain topography may reflect a continuous process, whereby local areas were always being filled somewhere on the floodplain by sediments from minor tributary or crevasse channels. Alternatively, the filling of local flood-plain topography may have been caused by widespread but short-lived events associated with river-channel avulsion. C1 SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560. NR 31 TC 82 Z9 90 U1 0 U2 1 PU SEPM-SOC SEDIMENTARY GEOLOGY PI TULSA PA 1731 E 71ST STREET, TULSA, OK 74136-5108 SN 1073-1318 J9 J SEDIMENT RES B JI J. Sediment. Res. Sect. B-Stratigr. Glob. Stud. PD FEB 15 PY 1994 VL 64 IS 1 BP 60 EP 67 PG 8 WC Geology SC Geology GA NK634 UT WOS:A1994NK63400004 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI THE GILDED GUTTER LIFE OF BACON,FRANCIS - FARSON,D SO LIBRARY JOURNAL LA English DT Book Review C1 SMITHSONIAN INST,NATL PORTRAIT GALLERY LIB,WASHINGTON,DC 20560. RP KALFATOVIC, MR (reprint author), NATL MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD FEB 15 PY 1994 VL 119 IS 3 BP 156 EP 157 PG 2 WC Information Science & Library Science SC Information Science & Library Science GA MX070 UT WOS:A1994MX07000036 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI SHAHN,BEN - POHL,F SO LIBRARY JOURNAL LA English DT Book Review C1 SMITHSONIAN INST,NATL PORTRAIT GALLERY LIB,WASHINGTON,DC 20560. RP KALFATOVIC, MR (reprint author), NATL MUSEUM NAT HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD FEB 15 PY 1994 VL 119 IS 3 BP 158 EP 158 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MX070 UT WOS:A1994MX07000042 ER PT J AU PYE, JP HODGKIN, ST STERN, RA STAUFFER, JR AF PYE, JP HODGKIN, ST STERN, RA STAUFFER, JR TI ROSAT X-RAY LUMINOSITY FUNCTIONS OF THE HYADES DK AND DM STARS SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE STARS ACTIVITY; BINARIES GENERAL; STARS CORONAE; STARS LOW-MASS, BROWN DWARFS; OPEN CLUSTERS AND ASSOCIATIONS INDIVIDUAL HYADES; X-RAYS STARS ID LOW-MASS STARS; LOWER MAIN-SEQUENCE; CLUSTER; DWARFS; RATIO AB A programme of long-duration (approximately 20-40 ks, ROSAT PSPC pointed observations of the Hyades open star cluster has been conducted. So far, 11 fields have been analysed, yielding, for selected regions (total area approximately 3.5 deg2), a sensitivity improvement over the PSPC all-sky survey of more than a factor of 5, and providing high-quality spectra and time series for the brighter sources. Approximately 75 per cent of the Hyads within the fields are detected in X-rays, including 23 out of 32 dM stars and 13 out of 17 dK stars; this allows us to construct their X-ray luminosity functions (XLFs) down to L(X) approximately 5 x 10(27) erg s-1 (0.1-2.4 keV). All four dMs with M(V) > 13 in our sample have been detected. We compare the Hyades dK and dM XLFs from our observations with published Einstein dK/dM YLFs. The Hyades dK binaries have significantly higher L(X) than the Hyades dK single stars. However, all these binaries have relatively long periods (greater than or similar to 1 yr), and hence the high L(X) levels cannot be attributed to the enhanced activity expected in short-period (less than or similar few days), 'BY Dra-type' systems. We also show that the effect cannot be due simply to the summed luminosities of the component stars. We discuss possible explanations in terms of pre-main-sequence evolution. C1 LOCKHEED PALO ALTO RES LABS,SOLAR & ASTROPHYS LAB,PALO ALTO,CA 94304. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP PYE, JP (reprint author), UNIV LEICESTER,DEPT PHYS & ASTRON,UNIV RD,LEICESTER LE1 7RH,ENGLAND. NR 34 TC 61 Z9 61 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD FEB 15 PY 1994 VL 266 IS 4 BP 798 EP 804 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MW545 UT WOS:A1994MW54500007 ER PT J AU WARD, DC AF WARD, DC TI THE ROMANCE OF REUNION - NORTHERNERS AND THE SOUTH, 1865-1900 - SILBER,N SO NEW YORK TIMES BOOK REVIEW LA English DT Book Review RP WARD, DC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK TIMES PI NEW YORK PA 229 W 43RD ST, NEW YORK, NY 10036-3959 SN 0028-7806 J9 NEW YORK TIMES BK R JI N. Y. Times Book Rev. PD FEB 13 PY 1994 BP 29 EP 29 PG 1 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA MV281 UT WOS:A1994MV28100034 ER PT J AU WEAVER, HA FELDMAN, PD AHEARN, MF ARPIGNY, C BROWN, RA HELIN, EF LEVY, DH MARSDEN, BG MEECH, KJ LARSON, SM NOLL, KS SCOTTI, JV SEKANINA, Z SHOEMAKER, CS SHOEMAKER, EM SMITH, TE STORRS, AD YEOMANS, DK ZELLNER, B AF WEAVER, HA FELDMAN, PD AHEARN, MF ARPIGNY, C BROWN, RA HELIN, EF LEVY, DH MARSDEN, BG MEECH, KJ LARSON, SM NOLL, KS SCOTTI, JV SEKANINA, Z SHOEMAKER, CS SHOEMAKER, EM SMITH, TE STORRS, AD YEOMANS, DK ZELLNER, B TI HUBBLE-SPACE-TELESCOPE OBSERVATIONS OF COMET-P/SHOEMAKER-LEVY-9 (1993E) SO SCIENCE LA English DT Article ID FIELD PLANETARY CAMERA AB The Hubble Space Telescope observed the fragmented comet P/Shoemaker-Levy 9 (1993e) (P indicates that it is a periodic comet) on 1 July 1993. Approximately 20 individual nuclei and their comae were observed in images taken with the Planetary Camera. After subtraction of the comae light, the 11 brightest nuclei have magnitudes between approximately 23.7 and 24.8. Assuming that the geometric albedo is 0.04, these magnitudes imply that the nuclear diameters are in the range approximately 2.5 to 4.3 kilometers. If the density of each nucleus is 1 gram per cubic centimeter, the total energy deposited by the impact of these 11 nuclei into Jupiter's atmosphere next July will be approximately 4 x 10(30) ergs (approximately 10(8) megatons of TNT). This latter number should be regarded as an upper limit because the nuclear magnitudes probably contain a small residual coma contribution. The Faint Object Spectrograph was used to search for fluorescence from OH, which is usually an excellent indicator of cometary activity. No OH emission was detected, and this can be translated into an upper limit on the water production rate of approximately 2 x 10(27) molecules per second. C1 JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. UNIV MARYLAND,DEPT ASTRON,COLL PK,MD 20742. STATE UNIV LIEGE,INST ASTROPHYS,B-4000 LIEGE,BELGIUM. JET PROP LAB,PASADENA,CA 91109. UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822. NO ARIZONA UNIV,DEPT PHYS & ASTRON,FLAGSTAFF,AZ 86011. US GEOL SURVEY,FLAGSTAFF,AZ 86001. SPACE TELESCOPE SCI INST,COMP SCI CORP,ASTRON PROGRAM,BALTIMORE,MD 21218. RP WEAVER, HA (reprint author), SPACE TELESCOPE SCI INST,3700 SAN MARTIN DR,BALTIMORE,MD 21218, USA. RI Noll, Keith/C-8447-2012; Weaver, Harold/D-9188-2016 NR 27 TC 46 Z9 47 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 11 PY 1994 VL 263 IS 5148 BP 787 EP 791 DI 10.1126/science.263.5148.787 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MV866 UT WOS:A1994MV86600028 PM 17770832 ER PT J AU BURG, R GIACCONI, R FORMAN, W JONES, C AF BURG, R GIACCONI, R FORMAN, W JONES, C TI THE X-RAY LUMINOSITY FUNCTIONS OF ABELL CLUSTERS FROM THE EINSTEIN CLUSTER SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, LUMINOSITY FUNCTION, MASS FUNCTION; X-RAYS, GALAXIES ID UPPER LIMITS; STATISTICAL-METHODS; ASTRONOMICAL DATA; GALAXIES; HEAO-1; CATALOG; SAMPLE AB We have derived the present epoch X-ray luminosity function of northern Abell clusters using luminosities from the Einstein Cluster Survey. The sample is sufficiently large that we can determine the luminosity function for each richness class separately with sufficient precision to study and compare the different luminosity functions. We find that, within each richness class, the range of X-ray luminosity is quite large and spans nearly a factor of 25. Characterizing the luminosity function for each richness class with a Schechter function, we find that the characteristic X-ray luminosity, L*, scales with richness class as L* proportional to N-*(gamma), where N* is the corrected, mean number of galaxies in a richness class, and the best-fitting exponent is gamma = 1.3 +/- 0.4. Finally, our analysis suggests that there is a lower limit to the X-ray luminosity of clusters which is determined by the integrated emission of the cluster member galaxies, and this also scales with richness class. The present sample forms a baseline for testing cosmological evolution of Abell-like clusters when an appropriate high-redshift cluster sample becomes available. C1 SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP BURG, R (reprint author), JOHNS HOPKINS UNIV,BLOOMBERG CTR PHYS & ASTRON,DEPT PHYS & ASTRON,HOMEWOOD CAMPUS,BALTIMORE,MD 21218, USA. NR 43 TC 15 Z9 15 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 37 EP 45 DI 10.1086/173701 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000003 ER PT J AU ELVIS, M FIORE, F WILKES, B MCDOWELL, J BECHTOLD, J AF ELVIS, M FIORE, F WILKES, B MCDOWELL, J BECHTOLD, J TI ABSORPTION IN X-RAY-SPECTRA OF HIGH-REDSHIFT QUASARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE QUASARS, ABSORPTION LINES; X-RAYS, GALAXIES ID ACTIVE GALACTIC NUCLEI; RADIO-SOURCES; SEYFERT-GALAXIES; INTERGALACTIC MEDIUM; ALPHA CLOUDS; LINE; EVOLUTION; CLUSTER; SYSTEMS; MATTER AB We present evidence that X-ray absorption is common in high-redshift quasars. We have studied six high-redshift (z similar to 3) quasars with the ROSAT PSPC of which four are in directions of low Galactic N-H. Three out of these four show excess absorption, while only three in similar to 50 z less than or similar to 0.4 quasars do, indicating that such absorption must be common, but not ubiquitous, at high redshifts, and that the absorbers must lie at z > 0.4. The six quasars were: S5 0014+81, Q0420-388, PKS 0438-436, S4 0636+680. PKS 2000-330, PKS 2126-158, which have redshifts between 2.85 and 3.78. PKS 0438-436 and PKS 2126-158 show evidence for absorption above the local Galactic value at better than 99.999% confidence level. If the absorber is at the redshift of the quasar, then values of N-H = [0.86(+0.49, -0.28)] x 10(22) atoms cm(-2) for PKS 0438-436, and N-H = [1.45(+1.20, -0.64)] x 10(22) atoms cm(-2) for PKS 2126-158, are implied, assuming solar abundances. The spectrum of S4 0636+680 also suggests the presence of a similarly large absorption column density at the 98% confidence level. This absorption reverses the trend for the most luminous active galactic nuclei (AGN) to have the least X-ray absorption, so a new mechanism is likely to be responsible. Intervening absorption due to damped L gamma alpha systems is a plausible cause. We also suggest, as an intrinsic model, that intracluster material, e.g., a cooling flow, around the quasar could account for both the X-ray spectrum and other properties of these quasars. All the quasars are radio-loud and three are gigahertz peaked (two of the three showing absorption). No excess absorption above the Galactic value is seen toward Q0420-388. This quasar has two damped L gamma alpha systems at z=3.08. The limit on the X-ray column density implies a low ionization fraction, N(H I)/N(H)greater than or similar to 4 x 10(-3) (3 sigma), for solar abundances, for these systems, and can set a weak limit on the size of the absorber. In the emitted frame these PSPC spectra cover the band similar to 0.5-10 keV, which has been well observed for low-redshift quasars and AGN. Comparison of high and low-redshift spectra in this emitted band shows no change of mean spectral index greater than Delta alpha(E) > 0.3 (99% confidence) with either redshift or luminosity, for radio-loud quasars. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. RP ELVIS, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Wilkes, Belinda/0000-0003-1809-2364; Fiore, Fabrizio/0000-0002-4031-4157 NR 100 TC 105 Z9 105 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 60 EP 72 DI 10.1086/173703 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000005 ER PT J AU PRESTWICH, AH JOSEPH, RD WRIGHT, GS AF PRESTWICH, AH JOSEPH, RD WRIGHT, GS TI STARBURST MODELS OF MERGING GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INTERACTIONS; GALAXIES, STARBURST; GALAXIES, STELLAR CONTENT; INFRARED, ISM, LINES AND BANDS ID RECENT STAR FORMATION; ULTRALUMINOUS INFRARED GALAXIES; INTERACTING GALAXIES; NUCLEAR ACTIVITY; GASEOUS NEBULAE; IRAS GALAXIES; ARP 220; NGC-6240; EMISSION; SPECTROSCOPY AB Merging galaxies sometimes have infrared luminosities as high as quasars. The origin of the infrared flux is controversial, but one of the most popular hypotheses is that the flux arises from dust heated by a starburst. If this is the case, the young stars should be surrounded by H II regions giving rise to recombination line flux. We present measurements of the Br gamma infrared recombination line of several merging galaxies and take several more from the literature. Our aim is to use a simple star formation model to see if the infrared recombination line fluxes and far-infrared fluxes are consistent with a starburst. We find that most of the mergers in this sample (six out of a total of eight) have infrared fluxes consistent with a simple starburst model. The starbursts are either young, or if they have evolved, there is a deficit of low-mass stars compared to stars in the solar neighborhood. There are two infrared-bright galaxies, Arp 220 and NGC 6240, that have a deficit of ionizing photons when compared to the other galaxies in this sample. These galaxies may be evolved starbursts in which an active nucleus dominates the far-infrared luminosity, but it is possible that extinction plus dust absorption of the L gamma alpha photons results in a much decreased recombination line flux from a starburst. C1 JOINT ASTRON CTR,HILO,HI 96720. INST ASTRON,HONOLULU,HI 96822. RP PRESTWICH, AH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02140, USA. NR 43 TC 27 Z9 27 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 73 EP 80 DI 10.1086/173704 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000006 ER PT J AU HUGHES, JP SINGH, KP AF HUGHES, JP SINGH, KP TI ELEMENTAL ABUNDANCES OF THE SUPERNOVA REMNANT G292.0+1.8 - EVIDENCE FOR A MASSIVE PROGENITOR SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, ABUNDANCES; ISM, INDIVIDUAL (G292.0+1.8); NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES; SUPERNOVA REMNANTS; X-RAYS, INTERSTELLAR ID X-RAY-EMISSION; NOVA REMNANTS; ENERGY-SPECTRA; ABSORPTION; MODELS; EVOLUTION; CLUSTERS AB We present a comprehensive nonequilibrium ionization (NEI) analysis of X-ray spectral data from the Einstein Observatory and EXOSAT for the supernova remnant G292.0+1.8. The spectra are well described by a single-temperature, single-timescale NEI model with kT = 1.64(-0.19)(+0.29) keV and n(e)= (5.55(-1.12)(+1.20))s, which establishes that this remnant is indeed young and in the ionizing phase of evolution of its X-ray spectrum. We determine the abundances of the elements O, Ne, Mg, Si, S, Ar, and Fe and examine their variation over the allowed range of column density, kT, and n(e), t. Numerical calculations of the nucleosynthesis expected for a 25 M(.) progenitor agree best with the fitted abundances; in fact the minimum rms percent difference between this model and the derived abundances is only 15%. From the fitted emission measure and a simple geometric model of the remnant we estimate the mass of X-ray-emitting plasma to be 9.3(-6.2)(+11.9) M(.), for an assumed distance of 4.8 +/- 1.6 kpc. Additional errors on this mass estimate, from clumping of the ejecta, for example, may be substantial. No evidence was found for a difference in the thermodynamic state of the plasma as a function of elemental composition based on analysis of the individual ionization timescales of the various species. In this sense then, G292.0+1.8 resembles the remnant Cas A (another product of a massive star supernova), while it is different from the remnants of SN 1572 (Tycho) and SN 1006, both of which are believed to be from Type Ia supernovae. C1 TATA INST FUNDAMENTAL RES,BOMBAY,INDIA. KYOTO UNIV,DEPT PHYS,KYOTO 606,JAPAN. RP HUGHES, JP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 50 TC 49 Z9 49 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 126 EP 135 DI 10.1086/173710 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000012 ER PT J AU YI, IS AF YI, IS TI ON HIGH-MASS ACCRETION RATES IN MAGNETIZED COLUMN ACCRETION ONTO WHITE-DWARFS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; STARS, INDIVIDUAL (GK PERSEI); STARS, NOVAE, CATACLYSMIC VARIABLES; X-RAYS, BURSTS; X-RAYS, STARS ID POLAR GK-PERSEI; INTERMEDIATE POLARS; DISK INSTABILITY; LIGHT-CURVES; QUIESCENCE; OUTBURSTS; PERIOD AB We show that high mass accretion rates (M greater than or equal to 10(18) g s(-1) in an intermediate polar (IF) GK Per are not only compatible with observations but also favored over low mass accretion rates (M<10(17) g s(-1) during outbursts using various theoretical and observational constraints. The column accretion with high mass accretion rates is significantly affected by radiation drag, which modifies the optically thin bremsstrahlung emission for M greater than or equal to 10(18) g s(-1). For high mass accretion rates, 2-10 keV X-ray luminosity is not a good indicator of mass accretion rate in the X-ray emitting region. The high mass accretion rates deduced from optical-UV luminosities which were previously estimated to be incompatible with those from X-ray luminosities are shown to be consistent. We discuss other observational constraints which are satisfied with high mass accretion rates. Narrowly constrained mass accretion rates could be used in constructing more sophisticated magnetized accretion models in GK Per and other intermediate polars. RP YI, IS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 28 TC 4 Z9 4 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 289 EP 292 DI 10.1086/173726 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000028 ER PT J AU PERES, G REALE, F GOLUB, L AF PERES, G REALE, F GOLUB, L TI LOOP MODELS OF LOW CORONAL STRUCTURES OBSERVED BY THE NORMAL-INCIDENCE-X-RAY-TELESCOPE (NIXT) SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUN, CHROMOSPHERE; SUN, CORONA; SUN, X-RAYS, GAMMA RAYS AB The X-ray pictures obtained with the Normal Incidence X-Ray Telescope (NIXT), apart from the ubiquitous coronal loops well known from previous X-ray observations, show a new and peculiar morphology: in many active regions there are wide and apparently low-lying areas of intense emission which resemble H alpha plages. By means of hydrostatic models of coronal arches, we analyze the distribution of temperature, density, emission measure, and plasma emissivity in the spectral band to which NIXT is sensitive, and we show that the above morphology can be explained by the characteristics of high pressure loops having a thin region of high surface brightness at the base. We therefore propose that this finding might help to identify high-pressure X-ray emitting coronal regions in NIXT images, and it is in principle applicable to any imaging instrument which has high sensitivity to 10(4)-10(6) K plasma within a narrow coronal-temperature passband. As a more general result of this study, we propose that the comparison of NIXT observations with models of stationary loops might provide a new diagnostic: the determination of the loop plasma pressure from measurements of brightness distribution along the loop. C1 OSSERV ASTROFIS CATANIA,I-95125 CATANIA,ITALY. SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. RP PERES, G (reprint author), IST & OSSERVATORIO ASTRON,PALAZZO NORMANNI,I-90134 PALERMO,ITALY. OI Reale, Fabio/0000-0002-1820-4824; Golub, Leon/0000-0001-9638-3082 NR 14 TC 46 Z9 46 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1994 VL 422 IS 1 BP 412 EP & DI 10.1086/173736 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU690 UT WOS:A1994MU69000038 ER PT J AU POST, RC AF POST, RC TI AMERICA CALLING - A SOCIAL-HISTORY OF THE TELEPHONE TO 1940 - FISCHER,CS SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP POST, RC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER HISTORICAL REVIEW PI WASHINGTON PA 400 A ST SE, WASHINGTON, DC 20003 SN 0002-8762 J9 AM HIST REV JI Am. Hist. Rev. PD FEB PY 1994 VL 99 IS 1 BP 310 EP 311 DI 10.2307/2166332 PG 2 WC History SC History GA MX692 UT WOS:A1994MX69200186 ER PT J AU DELLANTONIO, IP GELLER, MJ FABRICANT, DG AF DELLANTONIO, IP GELLER, MJ FABRICANT, DG TI X-RAY AND OPTICAL-PROPERTIES OF GROUPS OF GALAXIES SO ASTRONOMICAL JOURNAL LA English DT Article ID ASTROPHYSICS REDSHIFT SURVEY; POOR CLUSTERS; VELOCITY DISPERSIONS; CD GALAXIES AB We have measured 125 redshifts in 31 groups of galaxies observed with Einstein, and have compiled an additional 543 redshifts from the literature. There is a correlation between galaxy surface density and group velocity dispersion, with mu alpha sigma(1.6+/-0.6), but the scatter about this relation is large. We examine the relationship between the group x-ray luminosity in the 0.3-3.5 keV band and the measured velocity dispersion. Richer groups follow the same relation as rich clusters [cf. Quintana and Melnick, AJ, 87, 972 (1982)] with L(x) alpha sigma(4.0+/-0.6), but the relation flattens for lower luminosity systems which have velocity dispersions below 300 km s(-1). We suggest that the L(x)-sigma relation arises from a combination of extended cluster emission and emission associated with individual galaxies. The x-ray emission for the richer groups is dominated by emission from the intragroup medium, as for the richer clusters; emission from the poorer clusters is dominated by less extended emission associated with the individual group galaxies. RP DELLANTONIO, IP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 40 TC 51 Z9 51 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1994 VL 107 IS 2 BP 427 EP 447 DI 10.1086/116864 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU144 UT WOS:A1994MU14400001 ER PT J AU CARILLI, CL OWEN, FN HARRIS, DE AF CARILLI, CL OWEN, FN HARRIS, DE TI RADIO-CONTINUUM POLARIMETRIC IMAGING OF HIGH-REDSHIFT RADIO GALAXIES SO ASTRONOMICAL JOURNAL LA English DT Article ID CYGNUS-A; OPTICAL MORPHOLOGIES; MAGNETIC-FIELDS; STAR FORMATION; TURBULENCE; EMISSION; LOBES; EVOLUTION; ALIGNMENT; TELESCOPE AB Multifrequency images of total and polarized radio continuum emission from the two high redshift radio galaxies 0902+343 (z=3.40) and 0647+415 (4C 41.17, z=3.80) are presented. These images represent the most sensitive polarimetric study of high redshift radio galaxies to date. The emission from both galaxies is substantially polarized, up to 30% in some regions, and both sources sit behind deep ''Faraday screens,'' producing large rotation measures, over 10(3) rad m(-2) in magnitude, and large rotation measure gradients across the sources. Such large rotation measures provide further evidence that high redshift radio galaxies are situated in very dense environments. Drawing the analogy to a class of low redshift powerful radio galaxies with similarly large rotation measures, we suggest that 0902+343 and 0647+415 are situated at the centers of dense, x-ray ''cooling flow'' clusters, and that the cluster gas is substantially magnetized. The remarkable similarity between the optical and radio morphologies of 0647+415 on scales as small as 0.1'' is presented. We consider, and reject, both synchrotron and inverse Compton radiation as possible sources of the optical emission. We also consider both scattering of light out of a ''cone'' of radiation from an obscured nucleus, and jet-induced star formation, and find that both models encounter difficulties in explaining this remarkably close radio-optical alignment. High resolution spectral index images reveal compact, flat spectrum components in both sources. We suggest that these components are the active nuclei of the galaxies. Lastly, high resolution images of 0902+343 show that the southernmost component forms a ''ring'' of 0.2'' radius. We discuss the possibility that this ring is the result of gravitational lensing, along the lines proposed by Kochanek and Lawrence [AJ, 99, 1700 (1990)]. C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. RP CARILLI, CL (reprint author), NATL RADIO ASTRON OBSERV,POB O,SOCORRO,NM 87801, USA. NR 86 TC 63 Z9 63 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1994 VL 107 IS 2 BP 480 EP 493 DI 10.1086/116870 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU144 UT WOS:A1994MU14400007 ER PT J AU WALTER, FM VRBA, FJ MATHIEU, RD BROWN, A MYERS, PC AF WALTER, FM VRBA, FJ MATHIEU, RD BROWN, A MYERS, PC TI X-RAY SOURCES IN REGIONS OF STAR-FORMATION .5. THE LOW-MASS STARS OF THE UPPER SCORPIUS ASSOCIATION SO ASTRONOMICAL JOURNAL LA English DT Review ID T-TAURI STARS; MAIN-SEQUENCE STARS; OPHIUCHI DARK CLOUD; SOLAR-TYPE STARS; EINSTEIN OBSERVATIONS; LITHIUM ABUNDANCES; RADIAL-VELOCITIES; ORIONIS REGION; STANDARD STARS; SPECTRAL TYPES AB We report followup investigations of Einstein x-ray observations of the Upper Scorpius OB association. We identify 28 low mass pre-main-sequence stars as counterparts of x-ray sources in the approximate to 7 square degrees of the OB association observed. Based on kinematics and lithium abundances, these stars are low mass members of the OB association. We use optical spectra and optical and near-IR photometry to determine the stellar luminosities, effective temperatures, masses, and ages. We show that the bolometric corrections and effective temperatures of the G and K stars are consistent with those of subgiants. The low mass stars have isochronal ages of 1-2 Myr, depending on the choice of evolutionary models, with very small dispersion (sigma approximate to 1 Myr). This age is significantly younger than the 5-6 Myr found for the more massive B stars. The small dispersion in stellar ages, less than 10% the sound-crossing time of the association, suggests that star formation was triggered. We present two scenarios for star formation in this association. In the two-episode scenario, formation of the low mass stars was triggered by a supernova explosion, and the low mass stars form quickly, with high efficiency. Alternatively, high and low mass star formation was all initiated at the same time, some 5-6 Myr ago, and the apparent systematic age difference is an artifact of how the isochrones are dated. The effect of the supernova is to terminate mass accretion and yield an apparently coeval population. We show that the incompleteness in the x-ray sampling is about 65%, and is strongly dependent on stellar mass. After correction for incompleteness, we estimate there are about 2000 low mass members (M < 2M(.)) of this association. The mass function in this association is indistinguishable from that of the field. The ratio of naked to classical T Tauri stars is much larger than in Tau-Aur, and may be attributable to the local environment. We also present observations of eight ROX sources associated with the rho Oph cloud, and observations of non-PMS stars in our fields. C1 US NAVAL OBSERV,FLAGSTAFF STN,FLAGSTAFF,AZ 86002. UNIV WISCONSIN,DEPT ASTRON,MADISON,WI 53706. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV COLORADO,JOINT INST LAB ASTROPHYS,BOULDER,CO 80309. NATL INST STAND & TECHNOL,BOULDER,CO 80309. RP WALTER, FM (reprint author), SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794, USA. NR 124 TC 150 Z9 150 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1994 VL 107 IS 2 BP 692 EP 719 DI 10.1086/116889 PG 28 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU144 UT WOS:A1994MU14400026 ER PT J AU BLOEMHOF, EE BLUNDELL, R MILLER, RE AF BLOEMHOF, EE BLUNDELL, R MILLER, RE TI A 230 GHZ SIS RECEIVER FOR SEST SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE INSTRUMENTATION, DETECTORS; INSTRUMENTATION, SPECTROGRAPHS; INTERSTELLAR MEDIUM, INDIVIDUAL OBJECTS, P OPH CLOUDS ID SUBMILLIMETER; CORE AB We describe a low-noise 230 GHz SIS receiver built for use as a facility instrument at the Swedish-ESO Submillimeter Telescope (SEST) on La Silla, in the Chilean Andes. The mixer block is a simple but proven design with a single tuning backshort. An elaborate system of control electronics permits remote and highly automated tuning. Receiver performance in the lab and on the telescope are discussed, and some initial spectra from astrophysical sources are presented. C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. RP BLOEMHOF, EE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 15 TC 3 Z9 3 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 1994 VL 282 IS 1 BP 318 EP 324 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MW312 UT WOS:A1994MW31200040 ER PT J AU Vacanti, G Fleury, P Jiang, Y Pare, E Rovero, AC Sarazin, X Urban, M Weekes, TC AF Vacanti, G. Fleury, P. Jiang, Y. Pare, E. Rovero, A. C. Sarazin, X. Urban, M. Weekes, T. C. TI Muon ring images with an atmospheric Cerenkov telescope SO ASTROPARTICLE PHYSICS LA English DT Article AB High energy muons generated by air showers can be detected with atmospheric Cerenkov imaging telescopes via their ring signature. The distribution of Cerenkov light along the ring is a function only of the muon's distance of impact from the telescope: this property makes possible the calibration of the photon collection efficiency of imaging telescopes. We evaluate the acceptance of an imaging Cerenkov telescope to muons and discuss its application to the study of cosmic rays. We point out that muons may set a gamma-ray flux sensitivity limit for ground-based gamma-ray telescopes. C1 [Vacanti, G.; Fleury, P.; Pare, E.; Sarazin, X.; Urban, M.] Ecole Polytech, LPNHE, F-91128 Palaiseau, France. [Jiang, Y.] IHEP, Beijing 100039, Peoples R China. [Jiang, Y.; Rovero, A. C.; Weekes, T. C.] Harvard Smithsonian Ctr Astrophys, Whipple Observ, Amado, AZ 85645 USA. RP Vacanti, G (reprint author), Ecole Polytech, LPNHE, F-91128 Palaiseau, France. FU French IN2P3; US Department of Energy; Smithsonian Scholarly Studies Fund; Ecole Polytechnique FX We acknowledge fruitful discussions with Bernard Degrange. Support for this work comes from the French IN2P3, the US Department of Energy and the Smithsonian Scholarly Studies Fund. GV acknowledges a fellowship from the Ecole Polytechnique. NR 20 TC 29 Z9 29 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-6505 J9 ASTROPART PHYS JI Astropart Phys. PD FEB PY 1994 VL 2 IS 1 BP 1 EP 11 DI 10.1016/0927-6505(94)90012-4 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA V26DN UT WOS:000208526400001 ER PT J AU PROSSER, CF STAUFFER, JR HARTMANN, L SODERBLOM, DR JONES, BF WERNER, MW MCCAUGHREAN, MJ AF PROSSER, CF STAUFFER, JR HARTMANN, L SODERBLOM, DR JONES, BF WERNER, MW MCCAUGHREAN, MJ TI HST PHOTOMETRY OF THE TRAPEZIUM CLUSTER SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, VISUAL; ISM, INDIVIDUAL (ORION NEBULA); OPEN CLUSTERS AND ASSOCIATIONS, INDIVIDUAL (TRAPEZIUM); STARS, PRE-MAIN-SQUENCE ID MAIN-SEQUENCE STARS; ORION NEBULA; M-DWARFS; SYSTEMS; CLOUD; EVOLUTION; HISTORY; COUSINS; BINARY AB We have obtained images of 11 fields in the Trapezium cluster with the Planetary Camera (PC) of the Hubble Space Telescope in order to extend Herbig and Terndrup's (1986) study of this prototype, dense embedded cluster to fainter magnitudes than is possible from the ground. Using these images, we have identified 319 stars within an area of similar to 12 arcmin(2) corresponding roughly to a volume of similar to 0.065 pc(3) assuming the duster is approximately spherically symmetric. Our completeness limits for star identification in V-band and I-band images are V similar or equal to 20 and I-C similar or equal to 19 respectively, corresponding to a mass limit of approximately 0.15 M(.) if the faintest stars have the same average A, as that estimated for the brighter stars in the cluster. We have compared the V versus V-I color-magnitude diagram derived from the HST photometry to new theoretical isochrones. Star formation in the Trapezium appears to be remarkably coeval, with greater than or equal to 80% of the stars having inferred ages less than 1 Myr. Over the somewhat limited mass range of the observations, there is no evidence for ''bimodal'' star formation-the high- and low-mass stars appear to have the same ages. The sharp cores of the HST images and the small angular size of the PC pixels has allowed us to identify 35 new visual binaries in the cluster with separations from similar to 0''.06 (-26 AU) to similar to 1''.0 (similar to-440 AU). For the range of binary separations that we are sensitive to, the observed binary frequency for the Trapezium is essentially identical to that estimated for field low-mass stars by Duquennoy and Mayor (1991). The most straightforward inference from this result is that binaries in this separation are unlikely to be formed by a tidal capture process. We have also identified three stars which have associated compact nebulosity visible in the HST images. One of these star + nebulosity cases was previously identified by O'Dell, Wen, and Hu (1993)-these objects appear to form a class of objects whose circumstellar matter is being ''lit up,'' most likely by theta(1) Ori C, enabling the gas to be observable at both optical and radio wavelengths (Felli et al. 1993a, b). We provide a brief summary of the optical properties of the other radio sources which appear in our PC images. C1 SPACE TELESCOPE SCI INST, BALTIMORE, MD 21218 USA. UNIV CALIF SANTA CRUZ, LICK OBSERV, BOARD STUDIES ASTRON & ASTROPHYS, SANTA CRUZ, CA 95064 USA. CALTECH, JET PROP LAB, PASADENA, CA 91109 USA. MAX PLANCK INST ASTRON, W-6900 HEIDELBERG, GERMANY. RP SMITHSONIAN ASTROPHYS OBSERV, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 69 TC 223 Z9 223 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1994 VL 421 IS 2 BP 517 EP 541 DI 10.1086/173668 PN 1 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU542 UT WOS:A1994MU54200011 ER PT J AU DUPREE, AK HARTMANN, L SMITH, GH RODGERS, AW ROBERTS, WH ZUCKER, DB AF DUPREE, AK HARTMANN, L SMITH, GH RODGERS, AW ROBERTS, WH ZUCKER, DB TI SPECTROSCOPY OF CHROMOSPHERIC LINES OF GIANTS IN THE GLOBULAR-CLUSTER NGC-6752 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GLOBULAR CLUSTERS, INDIVIDUAL (NGC 6752); SHOCK WAVES; STARS, CHROMOSPHERES; STARS, GIANTS; STARS, MASS LOSS; ULTRAVIOLET, STARS ID FIELD RED GIANTS; H-ALPHA; MASS-LOSS; INTERSTELLAR ABSORPTION; INFRARED PHOTOMETRY; RADIAL-VELOCITIES; METAL ABUNDANCE; STARS; EVOLUTION; ULTRAVIOLET AB Spectroscopic observations of chromospheric transitions (Mg II, H alpha, and Ca II K) from two red giants (A31 and A59) in the globular cluster NGC 6572 were made with the Goddard High Resolution Spectrograph on the Hubble Space Telescope and the coude spectrograph of the 1.9 m telescope at the Mount Stromlo Observatory. These measurements give evidence for chromospheric activity and outward motions within the atmospheres. The surface flux of the Mg II emission is comparable to that in disk population giants of similar (B-V) color. The Mg II profiles are asymmetric, which is most likely caused by absorption in an expanding stellar atmosphere and/or by possible interstellar features. Notches are found in the core of the H alpha line of A59, which are similar to those found in Cepheids. This suggests that shocks are present in the atmosphere of A59 and indicates that hydrodynamic phenomena are influencing the level of chromospheric emission and producing upper atmospheric motions which may lead to mass loss. C1 UNIV CALIF SANTA CRUZ,LICK OBSERV,SANTA CRUZ,CA 95064. MT STROMLO & SIDING SPRING OBSERV,CANBERRA,ACT 2611,AUSTRALIA. RP DUPREE, AK (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 61 TC 26 Z9 26 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1994 VL 421 IS 2 BP 542 EP 549 DI 10.1086/173669 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU542 UT WOS:A1994MU54200012 ER PT J AU SEWARD, FD HARNDEN, FR AF SEWARD, FD HARNDEN, FR TI THE OUTER SHELL OF SNR 0540-69.3 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (0540 - 69.3); MAGELLANIC CLOUDS; SUPERNOVA REMNANTS; X-RAYS, INTERSTELLAR ID LARGE MAGELLANIC CLOUD; 50 MILLISECOND PULSAR; CRAB-NEBULA; SUPERNOVA; REMNANT; PSR-0540-69 AB The supernova remnant 0540-69.3 in the Large Magellanic Cloud has been observed with the ROSAT HRI detector. The outer shell was resolved from the bright central region and its X-ray morphology and luminosity determined. One-quarter of the soft X-rays originate in this shell. This result and a simple blast-wave model imply that the energy release in the supernova was about 2 x 10(51) ergs. RP SEWARD, FD (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 22 TC 22 Z9 22 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1994 VL 421 IS 2 BP 581 EP 584 DI 10.1086/173673 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU542 UT WOS:A1994MU54200016 ER PT J AU KASTNER, JH MYERS, PC AF KASTNER, JH MYERS, PC TI AN OBSERVATIONAL ESTIMATE OF THE PROBABILITY OF ENCOUNTERS BETWEEN MASS-LOSING EVOLVED STARS AND MOLECULAR CLOUDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, CLOUDS; NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES; SOLAR SYSTEM, FORMATION; STARS, GIANTS; STARS, MASS LOSS ID GIANT BRANCH STARS; CARBON-MONOXIDE EMISSION; REVISED AFGL CATALOGS; SOLAR NEIGHBORHOOD; LOSS RATES; DUST GRAINS; MILKY-WAY; CO SURVEY; AL-26; IRAS AB One hypothesis for the elevated abundance of Al-26 present during the formation of the solar system is that an asymptotic giant branch (AGB) star expired within the molecular cloud (MC) containing the protosolar nebula. To test this hypothesis for star-forming clouds at the present epoch, we compared nearly complete lists of rapidly mass-losing AGB stars and MCs in the solar neighborhood and identified those stars which are most likely to encounter a nearby cloud. Roughly 10 stars satisfy our selection criteria. We estimated probabilities of encounter for these stars from the position of each star relative to cloud CO emission and the likely star-cloud distance along the line of sight. Typical encounter probabilities are similar to 1%. The number of potential encounters and the probability for each star-cloud pair to result in an encounter suggest that within 1 kpc of the Sun, there is a similar to 1% chance that a given cloud will be visited by a mass-losing AGB star over the next million years. This estimate is dominated by the possibility of encounters involving the stars IRC +60041 and S Cep. Over a MC lifetime, the probability for AGB encounter may be as high as similar to 70%. We discuss the implications of these results for theories of Al-26 enrichment of processed and unprocessed meteoritic inclusions. If the Al-26 in either type of inclusion arose from AGB-MC interaction, the low probability estimated here seems to require that AGB-MC encounters trigger multiple star formation and/or that the production rate of AGB stars was higher during the epoch of solar system formation than at present. Various lines of evidence suggest only the more massive (5-8 M(.)) AGB stars can produce significant Al-26 enrichment of star-forming clouds. C1 MIT,HAYSTACK OBSERV,WESTFORD,MA 01886. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 47 TC 69 Z9 69 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1994 VL 421 IS 2 BP 605 EP 614 DI 10.1086/173676 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU542 UT WOS:A1994MU54200019 ER PT J AU GEHRZ, RD WOODWARD, CE GREENHOUSE, MA STARRFIELD, S WOODEN, DH WITTEBORN, FC SANDFORD, SA ALLAMANDOLA, LJ BREGMAN, JD KLAPISCH, M AF GEHRZ, RD WOODWARD, CE GREENHOUSE, MA STARRFIELD, S WOODEN, DH WITTEBORN, FC SANDFORD, SA ALLAMANDOLA, LJ BREGMAN, JD KLAPISCH, M TI THE TEMPORAL EVOLUTION OF THE 4-14 MICRON SPECTRUM OF V1974 CYGNI (NOVA CYGNI 1992) SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, STARS; NOVAE, CATACLYSMIC VARIABLES; RADIATION MECHANISMS, NONTHERMAL; STARS, ABUNDANCES; STARS, INDIVIDUAL (NOVA CYGNI 1992) ID HEAVY ELEMENT ABUNDANCES; INFRARED CORONAL LINES; VULPECULAE 1984; NEON NOVA AB We present 4-14 mu m spectra of the ONeMg nova V1974 Cygni (Nova Cygni 1992) obtained during 1992 May on the NASA Kuiper Airborne Observatory (KAO) and from the NASA 1.52 m infrared telescope at Mount Lemmon, Arizona in 1992 October/November with the HIFOGS mid-infrared spectrometer. The spectra at both epochs showed continuum emission from thermal bremstrahlung (free-free radiation) with emission lines from hydrogen and [Ne II], [Ar III], and [Ne VI]. During May, approximate to 80 days after outburst, the dominant emission lines in the mid-infrared spectra were a blend of three hydrogen lines (Pf alpha, Hu beta, H11-7) near 7.5 mu m and [Ne II] at 12.8 mu m. By October (approximate to 160 days later), the hydrogen emission had virtually disappeared, the [Ne II] 12.8 mu m line had weakened considerably, and a pronounced [Ne VI] emission line had appeared at 7.6 mu m. This behavior confirms that V1974 Cyg is similar to the prototypical slow ONeMg ''neon nova,'' Nova QU Vulpeculae (1984 No. 2). The remarkable evolution of the spectrum suggests that the ionization conditions changed drastically between 1992 May and 1992 October. We find that the ejecta of V1974 Cyg were overabundant in neon with respect to silicon by a factor of approximate to 10 relative to the solar photosphere. We present new model calculations of infrared sodium forbidden line emission from [Na III] 7.319 mu m, [Na IV] 9.039 mu m, and [Na IV] 21.29 mu m that can be compared with recent model predictions of sodium synthesis in ONeMg nova outbursts. We conclude that sodium abundances in ONeMg novae can be determined by observations of infrared coronal lines of sodium that are accessible to the Infrared Space Observatory (ISO) and instruments at the NASA IRTF. C1 UNIV WYOMING,DEPT PHYS & ASTRON,WYOMING INFRARED OBSERV,LARAMIE,WY 82071. SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20560. ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. NASA,AMES RES CTR,DIV SPACE SCI,MOFFETT FIELD,CA 94035. USN,RES LAB,ARTEP INC,WASHINGTON,DC 20375. RP GEHRZ, RD (reprint author), UNIV MINNESOTA,SCH PHYS & ASTRON,DEPT ASTRON,116 CHURCH ST SE,MINNEAPOLIS,MN 55455, USA. NR 40 TC 16 Z9 16 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1994 VL 421 IS 2 BP 762 EP 770 DI 10.1086/173688 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU542 UT WOS:A1994MU54200031 ER PT J AU CHOE, JC AF CHOE, JC TI SEXUAL SELECTION AND MATING SYSTEM IN ZOROTYPUS-GURNEYI CHOE (INSECTA, ZORAPTERA) .1. DOMINANCE HIERARCHY AND MATING SUCCESS SO BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY LA English DT Article DE DOMINANCE; FEMALE DEFENSE POLYGYNY; LEK; MATING SUCCESS; ZORAPTERA; ZOROTYPUS-GURNEYI ID EVOLUTION; MODELS AB Social behavior of a species in the little-known insect order Zoraptera is described for the first time. Zorotypus gurneyi Choe (Insecta: Zoraptera) is a wing-dimorphic species that lives colonially under the bark of rotting logs in central Panama. Males are larger than females in total body size and fight each other to gain access to females. Highly linear and stable dominance hierarchies exist among males. Higher-ranking males show such agonistic behavior as jerking, chasing, head-butting, hindleg-kicking, and grappling, whereas subordinates often try to avoid contacts. Higher-ranking males, the dominant males in particular, are well recognized by others and relatively free of injuries. Although the dominant males are often the largest, the correlation between body size and dominance rank is not always significant. The mating system of Z. gurneyi is an example of female defense polygyny in which the dominant males obtain the majority of matings (75% on average). Mating success among Z. gurneyi males is much more variable than that of some lekking species. C1 HARVARD UNIV,DEPT ORGANISM & EVOLUTIONARY BIOL,BIOL LABS,CAMBRIDGE,MA 02138. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 35 TC 29 Z9 29 U1 2 U2 5 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5443 J9 BEHAV ECOL SOCIOBIOL JI Behav. Ecol. Sociobiol. PD FEB PY 1994 VL 34 IS 2 BP 87 EP 93 PG 7 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA MY908 UT WOS:A1994MY90800002 ER PT J AU BONESS, DJ BOWEN, WD OFTEDAL, OT AF BONESS, DJ BOWEN, WD OFTEDAL, OT TI EVIDENCE OF A MATERNAL FORAGING CYCLE RESEMBLING THAT OF OTARIID SEALS IN A SMALL PHOCID, THE HARBOR SEAL SO BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY LA English DT Article DE MATERNAL STRATEGY; LACTATION; FORAGING; PINNIPEDS ID NORTHERN ELEPHANT SEAL; ANTARCTIC FUR SEALS; DIVING BEHAVIOR; MIROUNGA-LEONINA; NEONATAL GROWTH; BODY SIZE; INVESTMENT; PATTERNS; VITULINA; LIFE AB Lactation strategies in the two largest families of seals have been characterized as a phylogenetic dichotomy, with sea lions and fur seals (Otariidae) exhibiting foraging cycles and true seals (Phocidae) a strategy of fasting. We show that a lactating phocid, the harbor seal, Phoca vitulina, has a foraging cycle similar to that of otariids. Time-depth recorders attached to lactating harbor seal mothers revealed that 9 of 11 females began bouts of diving, averaging 12-40 m, by mid-lactation (12 days). During the remainder of lactation, females made an average of seven diving trips, lasting about 7 h. They returned to the rookery during the interval between successive bouts to nurse their pups. Diving was more frequent during daylight than at night and diving bouts increased in duration as lactation progressed. The diving behavior of females that had weaned their pups and previously collected data from stomach lavage, suggest that the bouts of diving represent successful foraging. We propose that the lactation strategy of the harbor seal is intermediate to that of the otariids and other phocids studied. The harbor seal has a foraging cycle like the otariids, but typically resembles other phocids in length of lactation, rate of mass gain in pups, and in milk fat content. As harbor seals are among the smallest phocids, and only slightly larger than most otariids, it seems likely that maternal size constrains the amount of stored energy harbor seal females can bring to the rookery, forcing them to start feeding during the lactation period. C1 FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,DIV MARINE FISH,DARTMOUTH B2Y 4A2,NS,CANADA. RP BONESS, DJ (reprint author), SMITHSONIAN INST,DEPT ZOOL RES,NATL ZOOL PK,WASHINGTON,DC 20008, USA. RI Bowen, William/D-2758-2012 NR 52 TC 114 Z9 114 U1 2 U2 27 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5443 J9 BEHAV ECOL SOCIOBIOL JI Behav. Ecol. Sociobiol. PD FEB PY 1994 VL 34 IS 2 BP 95 EP 104 PG 10 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA MY908 UT WOS:A1994MY90800003 ER PT J AU JAECKLE, WB AF JAECKLE, WB TI MULTIPLE-MODES OF ASEXUAL REPRODUCTION BY TROPICAL AND SUBTROPICAL SEA STAR LARVAE - AN UNUSUAL ADAPTATION FOR GENET DISPERSAL AND SURVIVAL SO BIOLOGICAL BULLETIN LA English DT Article ID MARINE BENTHIC INVERTEBRATES; ECHINODERM LARVAE; MORTALITY; EVOLUTION; LUIDIA; GROWTH AB Sea star larvae (Echinodermata: Asteroidea), collected from the subtropical Northwest Atlantic Ocean, exhibited three distinct modes of asexual reproduction. A number of different bipinnariae and brachiolariae reproduced by paratomous cloning of the posterolateral arms. This morphogenesis was identical to that of larvae assignable to the genus Luidia. A second mode of asexual reproduction involves the autotomization of an anterior portion of the preoral lobe. Primary larvae with preoral lobes of varying sizes and free-swimming preoral lobes of various stages of morphological development were simultaneously collected. The free-swimming preoral lobes developed complete digestive systems and ultimately assumed the form of typical bipinnaria larvae. Asexual reproduction by larvae may also take the form of budding. The released individual is either a blastula- or gastrula-stage embryo. Subsequent development to a bipinnaria-stage secondary larva, with the possible exception of coelom formation, appears to occur through the events associated with normal larval development. These diverse methods of asexual propagation provide a common mechanism to increase the length of larval life and amplify the number of individuals. Thus asexual reproduction by larvae should increase the likelihood of genet representation in the next generation. C1 HARBOR BRANCH OCEANOG INST INC,FT PIERCE,FL 34946. SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. NR 38 TC 38 Z9 39 U1 1 U2 6 PU MARINE BIOLOGICAL LABORATORY PI WOODS HOLE PA BIOLOGICAL BULL MBL STREET, WOODS HOLE, MA 02543 SN 0006-3185 J9 BIOL BULL JI Biol. Bull. PD FEB PY 1994 VL 186 IS 1 BP 62 EP 71 DI 10.2307/1542036 PG 10 WC Biology; Marine & Freshwater Biology SC Life Sciences & Biomedicine - Other Topics; Marine & Freshwater Biology GA NA790 UT WOS:A1994NA79000006 ER PT J AU OTA, H ROSS, CA AF OTA, H ROSS, CA TI 4 NEW SPECIES OF LYCODON (SERPENTES, COLUBRIDAE) FROM THE NORTHERN PHILIPPINES SO COPEIA LA English DT Article AB Four new species of the genus Lycodon (L. alcalai, L. bibonius, L. chrysoprateros, and L. solivagus) are described from Batan, Camiguin, Dalupiri, and Luzon islands of the northern Philippines. These species are similar to L. dumerili and L. muelleri but distinct from other Philippine congeners by having a slightly arched maxilla, medially divided nasal, and an entire anal shield. Lycodon alcalai and L. chrysoprateros differ from all other Philippine species of Lycodon in lacking transverse light bands on all of the body and tail. Lycodon alcalai differs from L. chrysoprateros in having more than 200 ventral scales (less than 195 in L. chysoprateros). Lycodon bibonius is distinct from other Lycodon species in the Philippines in having 22-25 and 16-21 pale bands on the body and tail, respectively; L. solivagus is characterized by 13-14 pale bands occurring only on the anterior three fourths of the body. C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT VERTEBRATE ZOOL,WASHINGTON,DC 20560. RP OTA, H (reprint author), UNIV RYUKYUS,DEPT BIOL,NISHIHARA,OKINAWA 90301,JAPAN. NR 20 TC 12 Z9 14 U1 0 U2 0 PU AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS BUSINESS OFFICE PI CARBONDALE PA SOUTHERN ILLINOIS UNIV, DEPT ZOOLOGY, CARBONDALE, IL 62901-6501 SN 0045-8511 J9 COPEIA JI Copeia PD FEB 1 PY 1994 IS 1 BP 159 EP 174 PG 16 WC Zoology SC Zoology GA MV931 UT WOS:A1994MV93100019 ER PT J AU WILLIAMS, SH ZIMBELMAN, JR AF WILLIAMS, SH ZIMBELMAN, JR TI WHITE ROCK - AN ERODED MARTIAN LACUSTRINE DEPOSIT() SO GEOLOGY LA English DT Article ID MARS AB The existence and location of ancient lake sites and sediments have important implications for Martian paleoclimate and exobiology. White Rock, an enigmatic crater interior deposit, may be the eroded remnant of such a lacustrine deposit. Stereogrammetric analysis of newly processed Viking images allows better determination of the dimensions of White Rock (12.5 x 15 km, thickness 180 to 540 m, volume similar to 40 km(3)), reveals differences in erosion patterns that may reflect differences in depositional environment, and allows the identification in or on the crater wall of a possible source region of the high-albedo White Rock material. If White Rock is the remnant of a once-larger deposit, then open-system circulation may have been required to deliver the required quantity of evaporites. C1 SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,CTR EARTH & PLANETARY STUDIES,WASHINGTON,DC 20560. RP WILLIAMS, SH (reprint author), ARIZONA STATE UNIV,DEPT GEOL,TEMPE,AZ 85287, USA. NR 21 TC 28 Z9 28 U1 0 U2 1 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD FEB PY 1994 VL 22 IS 2 BP 107 EP 110 DI 10.1130/0091-7613(1994)022<0107:WRAEML>2.3.CO;2 PG 4 WC Geology SC Geology GA MV539 UT WOS:A1994MV53900003 ER PT J AU WING, SL AF WING, SL TI PALEOBOTANY SO GEOTIMES LA English DT Editorial Material RP WING, SL (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT PALEOBIOL,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER GEOLOGICAL INST PI ALEXANDRIA PA 4220 KING ST, ALEXANDRIA, VA 22302-1507 SN 0016-8556 J9 GEOTIMES JI Geotimes PD FEB PY 1994 VL 39 IS 2 BP 18 EP 19 PG 2 WC Geosciences, Multidisciplinary SC Geology GA MU616 UT WOS:A1994MU61600019 ER PT J AU HYATT, CW RICHARDSON, AT COPELAND, BW LEHNHARDT, JR AF HYATT, CW RICHARDSON, AT COPELAND, BW LEHNHARDT, JR TI ELE-TYPE - AN AUTOMATED FEEDING AND TESTING DEVICE FOR ELEPHANTS SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT LA English DT Letter AB An automated feeding and testing device was developed to provide behavioral enrichment and research instrumentation for the elephants at the National Zoological Park/Smithsonian Institution in Washington, DC. C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. RP HYATT, CW (reprint author), MAMMOTH PROD,ATLANTA,GA, USA. NR 7 TC 0 Z9 0 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9456 J9 IEEE T INSTRUM MEAS JI IEEE Trans. Instrum. Meas. PD FEB PY 1994 VL 43 IS 1 BP 100 EP 101 DI 10.1109/19.286364 PG 2 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA NQ128 UT WOS:A1994NQ12800019 ER PT J AU BARONE, MA ROELKE, ME HOWARD, J BROWN, JL ANDERSON, AE WILDT, DE AF BARONE, MA ROELKE, ME HOWARD, J BROWN, JL ANDERSON, AE WILDT, DE TI REPRODUCTIVE CHARACTERISTICS OF MALE FLORIDA PANTHERS - COMPARATIVE-STUDIES FROM FLORIDA, TEXAS, COLORADO, LATIN-AMERICA, AND NORTH-AMERICAN ZOOS SO JOURNAL OF MAMMALOGY LA English DT Article DE FELIS-CONCOLOR; FLORIDA PANTHER; MALE REPRODUCTIVE TRAITS; CRYPTORCHIDISM; SPERM MORPHOLOGY; TESTOSTERONE; CONSERVATION ID INVITRO FERTILIZATION; SEMEN CHARACTERISTICS; FELIS-CONCOLOR; SPERMATOZOA; FERTILITY; CHEETAH; TIGER; MORPHOLOGY; EJACULATE; ACROSOME AB Testicular volume, semen traits, and pituitary-gonadal hormones were measured in populations of Felis concolor from Florida, Texas, Colorado, Latin America, and Nor-th American zoos. More Florida panthers (F. concolor coryi) were unilaterally cryptorchid (one testicle not descended into the scrotum) than other populations (43.8 versus 3.9%, respectively). Florida panthers also had lower testicular and semen volumes, poorer sperm progressive motility, and more morphologically abnormal sperm, including a higher incidence of acrosomal defects and abnormal mitochondrial sheaths. Transmission electron microscopy revealed discontinuities in the acrosome, extraneous acrosomal material under the plasma membrane, and remnants of the golgi complex under the acrosome. No differences were detected in mean-circulating follicle-stimulating hormone, luteinizing hormone, or testosterone between Florida panthers and other populations of mountain lions. Seminal traits and concentrations of follicle-stimulating hormone, luteinizing hormone, and testosterone were similar between cryptorchid and noncryptorchid Florida panthers. Animals with F. concolor coryi ancestry were categorized on the basis of amount of genetic variation (low = type A; medium = type B; high = captive Piper stock). Compared to counterparts, type A Florida panthers had the lowest testicular volume and sperm-motility ratings and were the only animals exhibiting unilateral cryptorchidism. These results demonstrate the existence of major morphological and physiological differences among populations of F. concolor, a finding potentially related to differences in genetic diversity. C1 SMITHSONIAN INST,DEPT REPROD PHYSIOL,NATL ZOOL PK,WASHINGTON,DC 20008. FLORIDA GAME & FRESHWATER FISH COMMISS,GAINESVILLE,FL 32601. UNIFORMED SERV UNIV HLTH SCI,DEPT OBSTET & GYNECOL,BETHESDA,MD 20814. COLORADO DIV WILDLIFE,MONTROSE,CO 81401. NR 52 TC 79 Z9 81 U1 1 U2 14 PU AMER SOC MAMMALOGISTS PI PROVO PA BRIGHAM YOUNG UNIV, DEPT OF ZOOLOGY, PROVO, UT 84602 SN 0022-2372 J9 J MAMMAL JI J. Mammal. PD FEB PY 1994 VL 75 IS 1 BP 150 EP 162 DI 10.2307/1382247 PG 13 WC Zoology SC Zoology GA MX241 UT WOS:A1994MX24100020 ER PT J AU CHEN, YMA JANG, YJ KANKI, PJ YU, QC WANG, JJ MONTALI, RJ SAMUEL, KP PAPAS, TS AF CHEN, YMA JANG, YJ KANKI, PJ YU, QC WANG, JJ MONTALI, RJ SAMUEL, KP PAPAS, TS TI ISOLATION AND CHARACTERIZATION OF SIMIAN T-CELL LEUKEMIA-VIRUS TYPE-II FROM NEW-WORLD MONKEYS SO JOURNAL OF VIROLOGY LA English DT Article ID NON-HUMAN PRIMATES; COMPLETE NUCLEOTIDE-SEQUENCE; LYMPHOTROPIC VIRUS; HTLV-II; JAPANESE MONKEYS; LYMPHOMA VIRUS; C RETROVIRUS; ANTIGEN ATLA; ANTIBODIES; INFECTION AB Since the description of human T-cell leukemia virus type I (HTLV-I) and its simian counterpart, simian T-cell leukemia virus type I (STLV-I), the possible existence of other related simian retroviruses has been raised. Here, we report a new retrovirus, STLV-II, which we have identified in spider monkeys (Ateles fusciceps), a New World primate species. Initially, a recombinant HTLV-II envelope protein (RP-IIB) was used to identify anti-STLV-II antibodies in New World monkeys by Western blot (immunoblot) assays. Subsequently, the virus was characterized by Southern blot hybridization, which showed that STLV-II and HTLV-II have a high degree of nucleotide sequence homology but have different restriction enzyme patterns. Nucleotide sequence analysis of the pX-II region of STLV-II provirus revealed 3% variation with the corresponding region of HTLV-II. Electron micrographic studies revealed HTLV-like, type C retrovirus particles outside the cell membranes of STLV-II-infected cells. This study describes the first link between HTLV-II and a simian reservoir in the New World. Further molecular studies of STLV-II infection in different species of New World monkeys, especially from the wild, may provide valuable information about the origin and intragroup relationships of South American monkeys. Spider monkeys infected with STLV-II may serve as an important animal model for HTLV-II infection in humans. C1 NATL YANG MING MED COLL,GRAD INST PUBL HLTH,AIDS RES CTR,TAIPEI 11221,TAIWAN. HARVARD UNIV,SCH PUBL HLTH,DEPT CANC BIOL,BOSTON,MA 02115. UNIV CHICAGO,DEPT MOLEC GENET & CELL BIOL,CHICAGO,IL 60637. SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20008. DYN CORP,PROGRAM RESOURCES INC,BIOTECHNOL WORKING GRP,CELLULAR BIOCHEM LAB,FREDERICK,MD 21701. NCI,MOLEC ONCOL LAB,FREDERICK,MD 21702. RP CHEN, YMA (reprint author), ACAD SINICA,INST BIOMED SCI,TAIPEI 11529,TAIWAN. NR 60 TC 35 Z9 35 U1 0 U2 3 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0022-538X J9 J VIROL JI J. Virol. PD FEB PY 1994 VL 68 IS 2 BP 1149 EP 1157 PG 9 WC Virology SC Virology GA MW252 UT WOS:A1994MW25200064 PM 7507178 ER PT J AU RILEY, S AF RILEY, S TI BANISHED CHILDREN OF EVE - QUINN,P SO LIBRARY JOURNAL LA English DT Book Review RP RILEY, S (reprint author), SMITHSONIAN INST LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD FEB 1 PY 1994 VL 119 IS 2 BP 113 EP 113 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MU635 UT WOS:A1994MU63500200 ER PT J AU LIN, JD HINES, AH AF LIN, JD HINES, AH TI EFFECTS OF SUSPENDED FOOD AVAILABILITY ON THE FEEDING MODE AND BURIAL DEPTH OF THE BALTIC CLAM, MACOMA-BALTHICA SO OIKOS LA English DT Review ID DUTCH WADDEN SEA; SAN-FRANCISCO BAY; CHESAPEAKE BAY; BURYING DEPTH; TIDAL FLAT; INTRASPECIFIC COMPETITION; PHYTOPLANKTON BIOMASS; DEPOSIT FEEDERS; PREDATION; COMMUNITIES AB Previous studies showed that siphon cropping by epibenthic predators reduces the size of inhalant siphon of the Baltic clam Macoma balthica (L.), causing the clams to reside at shallower burial depths in the sediment and making them more vulnerable to lethal predation. This indirect interaction is further complicated because M. balthica facultatively switches between suspension- and deposit-feeding in response to the availability of suspended food particles. Laboratory experiments showed that the proportion of clams deposit feeding with exposed siphons increased with decreasing food concentrations in the water column and this resulted in shallower burial depths in the sediment. The clams showed similar responses in feeding mode and burial depth to the concentrations of suspended food indirectly manipulated by the presence and/or density of either interspecific (suspension-feeding soft-shelled clam Mya arenarin L.) or intraspecific competitors. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. NR 55 TC 53 Z9 53 U1 2 U2 14 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0030-1299 J9 OIKOS JI Oikos PD FEB PY 1994 VL 69 IS 1 BP 28 EP 36 DI 10.2307/3545280 PG 9 WC Ecology SC Environmental Sciences & Ecology GA MR887 UT WOS:A1994MR88700003 ER PT J AU WASHBURN, WB AF WASHBURN, WB TI THE SHAPING OF AMERICA, A GEOGRAPHICAL PERSPECTIVE ON 500 YEARS OF HISTORY, VOL 2, CONTINENTAL AMERICA, 1800-1867 - MEINIG,DW SO PACIFIC HISTORICAL REVIEW LA English DT Book Review RP WASHBURN, WB (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0030-8684 J9 PAC HIST REV JI Pac. Hist. Rev. PD FEB PY 1994 VL 63 IS 1 BP 86 EP 87 PG 2 WC History SC History GA NA164 UT WOS:A1994NA16400010 ER PT J AU WALSWORTH, RL MATTISON, EM VESSOT, RFC SILVERA, IF AF WALSWORTH, RL MATTISON, EM VESSOT, RFC SILVERA, IF TI RECENT INVESTIGATIONS WITH THE HARVARD-SMITHSONIAN CRYOGENIC HYDROGEN MASER SO PHYSICA B LA English DT Article; Proceedings Paper CT 20th International Conference on Low Temperature Physics CY AUG 04-11, 1993 CL EUGENE, OR SP INT UNION PURE & APPL PHYS, AMER PHYS SOC, CITY EUGENE, INT INST REFRIGERAT, INT SCI FDN, JET PROPULS LABS, NATL SCI FDN, USN, OFF NAVAL RES, OXFORD INSTRUMENTS INC, TEKTRONIX INC, UNIV OREGON AB We have developed a hydrogen maser that operates near 0.5 K, using a high-cooling-power He-3 refrigerator. We are using this cryogenic hydrogen maser to study low temperature atomic hydrogen spin-exchange collisions and hydrogen-helium interactions, and to investigate the performance of cryogenic hydrogen masers as possibly improved frequency standards. We report recent measurements on these topics. C1 HARVARD UNIV,LYMAN LAB PHYS,CAMBRIDGE,MA 02138. RP WALSWORTH, RL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD FEB PY 1994 VL 194 BP 915 EP 916 DI 10.1016/0921-4526(94)90787-0 PN 1 PG 2 WC Physics, Condensed Matter SC Physics GA NB789 UT WOS:A1994NB78900461 ER PT J AU BROWN, GJN OROURKE, SFC CROTHERS, DSF AF BROWN, GJN OROURKE, SFC CROTHERS, DSF TI VARIATIONAL-PRINCIPLES AND 2ND-ORDER LAGRANGIAN DENSITIES SO PHYSICA SCRIPTA LA English DT Article ID SCATTERING AB The functionals of the Kohn and Sil variational principles of atomic collision theory contain second-order spatial derivatives of the wave-function. Ipso facto the 'second-order'' generalised Euler-Lagrange differential equation is a necessary condition for these functionals to yield a stationary value. To illustrate this we provide a classical prescription for the time-dependent and time-independent quantum potential scattering problems, generalising the latter to the three-body problem. As practical examples where the presence of second-order derivatives in the Lagrangian density makes a non-trivial contribution to the equations of motion, we consider the optimisation of translation factors in a trial wave-function using the Sil variational principle and the optimisation of a variable charge using the Kohn variational principle. As further examples of Lagrangian densities where second-order derivatives may occur we briefly mention electromagnetism and relativistic quantum mechanics. C1 INST PHYS & CHEM RES,WAKO,SAITAMA 351,JAPAN. HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP BROWN, GJN (reprint author), QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,DIV THEORET & COMPUTAT PHYS RES,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. NR 19 TC 2 Z9 2 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PD FEB PY 1994 VL 49 IS 2 BP 129 EP 134 DI 10.1088/0031-8949/49/2/001 PG 6 WC Physics, Multidisciplinary SC Physics GA MX416 UT WOS:A1994MX41600001 ER PT J AU GAO, J DELOS, JB AF GAO, J DELOS, JB TI RESONANCES AND RECURRENCES IN THE ABSORPTION-SPECTRUM OF AN ATOM IN AN ELECTRIC-FIELD SO PHYSICAL REVIEW A LA English DT Article ID PHOTOABSORPTION CROSS-SECTIONS; CLOSED-ORBIT THEORY; PERIODIC-ORBITS; HAMILTONIAN-SYSTEMS; HYDROGEN; QUANTIZATION; OSCILLATIONS; THRESHOLD AB We use closed-orbit theory to study the absorption spectrum of an atom in an electric field. In previous work we examined absorption spectra above the zero-field ionization threshold. Only one closed orbit exists there, and it is unstable. Now we examine the situation below threshold. Here, the orbit parallel to the electric field is stable and, as the energy decreases, many other closed orbits bifurcate out of it. These closed orbits have simple patterns, and the associated recurrences are most clear if the absorption spectrum is measured using a scaled-variables method. The relation between the semiclassical Einstein-Brillouin-Keller-Marcus (EBKM) theory and periodic-orbit or closed-orbit theory is examined: they are complementary methods in the same sense that energy and time are complementary variables in quantum mechanics. Our numerical calculations show that sinusoidal fluctuations contributed by the closed orbits combine into peaks, and these peaks are in the locations predicted by EBKM theory. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP GAO, J (reprint author), COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23187, USA. NR 23 TC 77 Z9 82 U1 0 U2 0 PU AMERICAN 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 FEB PY 1994 VL 49 IS 2 BP 869 EP 880 DI 10.1103/PhysRevA.49.869 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MW352 UT WOS:A1994MW35200035 ER PT J AU PRADHAN, A DALGARNO, A AF PRADHAN, A DALGARNO, A TI CHARGE-TRANSFER OF H+ WITH CL AND CL+ WITH H SO PHYSICAL REVIEW A LA English DT Article ID DENSE INTERSTELLAR CLOUDS; RADIATIVE LIFETIMES; CROSS-SECTIONS; CHLORINE; HCL+ AB The molecular states that control the charge transfer of protons with chlorine atoms and of chlorine ions with hydrogen atoms are identified, and estimates are made of the strengths of the spin-orbit interactions that drive the processes. The cross sections are calculated by solving numerically the coupled equations of scattering theory and the resulting rate coefficients are presented. The rate coefficient for the charge transfer of protons with chlorine atoms at 70 K is 1.2X10(-12) cm(3)s(-1) and at 300 K is 4.3X10(-11)cm(3)s(-1). C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 18 TC 7 Z9 7 U1 1 U2 2 PU AMERICAN 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 FEB PY 1994 VL 49 IS 2 BP 960 EP 964 DI 10.1103/PhysRevA.49.960 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MW352 UT WOS:A1994MW35200048 ER PT J AU MARINESCU, M SADEGHPOUR, HR DALGARNO, A AF MARINESCU, M SADEGHPOUR, HR DALGARNO, A TI DISPERSION COEFFICIENTS FOR ALKALI-METAL DIMERS SO PHYSICAL REVIEW A LA English DT Article ID STATIC DIPOLE POLARIZABILITIES; EARTH ATOMS; NOBLE-GAS; LI; QUADRUPOLE; ENERGIES; HYDROGEN; NA AB Knowledge of the long-range interaction between atoms and molecules is of fundamental importance for low-energy and low-temperature collisions. The electronic interaction between the charge distributions of two ground-state alkali-metal atoms can be expanded in inverse powers of R, the internuclear distance. The coefficients C-6, C-8, and C-10 of, respectively, the R(-6), R(-8), and R(-10) terms are calculated by integrating the products of the dynamic electric multipole polarizabilities of the individual atoms at imaginary frequencies, which are in turn obtained by solving two coupled inhomogeneous differential equations. Precise one-electron model potentials are developed to represent the motion of the valence electron in the field of the closed alkali-metal positive-ion core. The numerical results for the static multipole polarizabilities for the alkali-metal atoms and the coefficients C-6, C-8, and C-10 for homonuclear and heteronuclear alkali-metal diatoms are compared with other calculations. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 43 TC 283 Z9 287 U1 4 U2 20 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9926 EI 2469-9934 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1994 VL 49 IS 2 BP 982 EP 988 DI 10.1103/PhysRevA.49.982 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MW352 UT WOS:A1994MW35200051 ER PT J AU WHIPPLE, FL AF WHIPPLE, FL TI THE DILEMMA OF THE NEW-COMET FLUX SO PLANETARY AND SPACE SCIENCE LA English DT Article; Proceedings Paper CT Asteroids, Comets and Meteors 1993 Meeting (ACM 93) CY JUN 13-17, 1993 CL BELGIRATE, ITALY ID LONG-PERIOD COMETS; ORBITS AB The question of the constancy of the flux rate of ''new'' comets from the Oort cloud is critical in studies of the origin of comets. The large numbers may be explained by our being in a ''comet shower'' or else by a loss of intrinsic brightness by new comets during their first passage through the inner solar system-hence the dilemma. Improvements in the quality and quantity of reliable orbits now make possible fairly precise evaluation of the data involved in the dilemma and a realistic comparison of the two alternatives. If we are in a comet shower, the increase with respect to the last several tens of thousands of years is not more than a factor of 1.8 nor a magnitude loss during first passage of more than 0.85m. This applies if new comets are defined as those with periods greater than 106 yr. If the limit is set at 2.8 x 10(6) yr, we may not be really in a comet shower and a good fraction of the comets with periods in the range 10(6) < P < 2.8 x 10(6) yr may be returning comets. The Oort cloud would then be fairly stable to nearly 40,000 AU. If we assume the reality of comet fading in the sense that few new comets are observable on their returns when more distant than 3.0 AU from the Sun, and if we then limit the discussion to comets with perihelion distance q < 3.0 AU, there is no evidence for a shower. RP WHIPPLE, FL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 17 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD FEB PY 1994 VL 42 IS 2 BP 179 EP 182 DI 10.1016/0032-0633(94)90029-9 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NY549 UT WOS:A1994NY54900015 ER PT J AU DONAHUE, RA RESTAINO, SR KEIL, SL AF DONAHUE, RA RESTAINO, SR KEIL, SL TI SOLAR AND STELLAR CHROMOSPHERIC CONTRAST .1. THE DISK-INTEGRATED SOLAR K-LINE SO SOLAR PHYSICS LA English DT Article ID VARIABILITY; SUN AB We present an analysis of disk-integrated spectra of the Ca II K line (3933.68 angstrom). The selection of parameters in the line profile, and the correlations between them, follow the work of Smith (1960), but represent an innovative aspect in the fact that our data are spatially integrated. Therefore, the subsequent identification of correlations between line-profile parameters in disk-integrated solar spectra may be useful in identifying similar correlations in high-resolution spectra of solar-like stars. Significant correlations are found between a derived chromospheric contrast parameter and K2 asymmetry, K3 intensity, and the integrated K-line flux. The derived filling factors of the active regions that mark rotation and the total active chromospheric network agree well with estimates from contemporaneous images of the Sun. C1 USAF, PL, LIMI, ALBUQUERQUE, NM USA. USAF, PL, GSSP, NATL SOLAR OBSERV, SUNSPOT, NM USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 24 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0038-0938 EI 1573-093X J9 SOL PHYS JI Sol. Phys. PD FEB PY 1994 VL 149 IS 2 BP 257 EP 265 DI 10.1007/BF00690614 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MX569 UT WOS:A1994MX56900005 ER PT J AU ERHARDT, D BISHOFF, JJ AF ERHARDT, D BISHOFF, JJ TI THE ROLES OF VARIOUS COMPONENTS OF RESIN SOAPS, BILE-ACID SOAPS, AND GELS, AND THEIR EFFECTS ON OIL-PAINT FILMS SO STUDIES IN CONSERVATION LA English DT Article C1 DETROIT INST ARTS, CONSERVAT SERV LAB, DETROIT, MI USA. RP SMITHSONIAN INST, CONSERVAT ANALYT LAB, WASHINGTON, DC 20560 USA. NR 23 TC 14 Z9 14 U1 1 U2 1 PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0039-3630 EI 2047-0584 J9 STUD CONSERV JI Stud. Conserv. PD FEB PY 1994 VL 39 IS 1 BP 3 EP 27 DI 10.2307/1506487 PG 25 WC Archaeology; Art; Chemistry, Applied; Chemistry, Analytical; Spectroscopy SC Archaeology; Art; Chemistry; Spectroscopy GA NK868 UT WOS:A1994NK86800001 ER PT J AU SRYGLEY, RB AF SRYGLEY, RB TI LOCOMOTOR MIMICRY IN BUTTERFLIES - THE ASSOCIATIONS OF POSITIONS OF CENTERS OF MASS AMONG GROUPS OF MIMETIC, UNPROFITABLE PREY SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES LA English DT Article ID HOVERING INSECT FLIGHT; NEOTROPICAL BUTTERFLIES; POWER REQUIREMENTS; AERODYNAMICS; MORPHOLOGY; COLORATION; PREDATION; PAPILIONOIDEA; BIOMECHANICS; PALATABILITY AB With detailed measurements of flight-related morphological parameters of 18 species within the tribe Heliconiini and 10 of their non-heliconiine comimics, I found that morphological parameters relevant to flight biomechanics are associated with three escape tactics of these Neotropical butterflies: evasive flight, distastefulness, and mimicry. Two distinct character suites, one pertaining to the position of centre of body mass and another pertaining to wing shape, were identified using principal-components analysis. A third component correlated most highly with the position of centre of wing mass. Mimicry groups were best discriminated by the positions of centres of body and wing mass, suggesting that these features converged within mimicry groups. Centres of mass were positioned nearer to the wing base in mimicry groups composed of more palatable species, presumably decreasing the radial moments of inertia of the body and wings and increasing flight speed and turning performance. Predation has selected for body morphology that increases flight speed and manoeuvrability in palatable butterflies, whereas the morphology of distasteful species compromises flight performance. Convergent selection may reduce morphological differences of species within mimicry groups arising from distantly related lineages, and hence it may have enhanced the morphological diversification of palatable and unpalatable butterflies within lineages that have more recently evolved distastefulness. C1 UNIV TEXAS,DEPT ZOOL,AUSTIN,TX 78712. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 52 TC 61 Z9 63 U1 2 U2 10 PU ROYAL SOC LONDON PI LONDON PA 6 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5AG SN 0962-8436 J9 PHILOS T ROY SOC B JI Philos. Trans. R. Soc. Lond. Ser. B-Biol. Sci. PD JAN 29 PY 1994 VL 343 IS 1304 BP 145 EP 155 DI 10.1098/rstb.1994.0017 PG 11 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MV156 UT WOS:A1994MV15600003 ER PT J AU FARRELLY, D EMMEL, MD AF FARRELLY, D EMMEL, MD TI SEMICLASSICAL QUANTIZATION OF DOUBLY-EXCITED INTRASHELL RESONANCES OF THE HELIUM ATOM SO CHEMICAL PHYSICS LETTERS LA English DT Article ID SELF-CONSISTENT-FIELD; POLYATOMIC-MOLECULES; ENERGY-LEVELS; STATES; EIGENVALUES; SYSTEMS AB The semiclassical self-consistent field method is applied to the computation of intrashell resonances of the He atom. Results for high-lying states, where quantum calculations are difficult, are accurate to better than 1% despite the fully chaotic nature of the dynamics. Like the exact wavefunction, the self-consistent field wavefunction shows pronounced scarring along the periodic orbit corresponding to an asymmetric stretch motion of the electrons. C1 UTAH STATE UNIV,DEPT CHEM & BIOCHEM,LOGAN,UT 84322. RP FARRELLY, D (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 19 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 28 PY 1994 VL 217 IS 5-6 BP 520 EP 524 DI 10.1016/0009-2614(93)E1443-K PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA MV301 UT WOS:A1994MV30100008 ER PT J AU TURNER, JL HO, PTP AF TURNER, JL HO, PTP TI BRIGHT RADIO-CONTINUUM EMISSION FROM STAR-FORMATION IN THE CORES OF NEARBY SPIRAL GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Review DE GALAXIES, NUCLEI; RADIO CONTINUUM, GALAXIES; SUPERNOVA REMNANTS ID H-II REGIONS; FAR-INFRARED OBSERVATIONS; INITIAL MASS FUNCTION; SUPERNOVA-REMNANTS; GALACTIC NUCLEI; MOLECULAR GAS; CO EMISSION; INTERSTELLAR-MEDIUM; SEYFERT-GALAXIES; COMPLETE SAMPLE AB We have mapped 6 and 2 cm continuum emission from the nuclear regions of ten normal spiral galaxies (Maffei 2, NGC 2403, M81, NGC 4236, NGC 4258, NGC 4736, NGC 4826, M51, M83, and M101) using the VLA. The galaxies were chosen because they are nearby(less than or similar to 5 Mpc) and likely to have bright continuum emission. Matching beamsizes of similar to 1''.5 allow the construction of spectral index maps from which the relative amounts of thermal bremsstrahlung and nonthermal synchrotron emission are estimated. Bright radio continuum is detected within the inner arcminute of eight of the 10 galaxies. Even at arcsecond resolution, corresponding to sizescales of 10-30 pc, nonthermal synchrotron emission from supernova remnants (SNRs) dominates the 6 cm continuum fluxes. High intensities suggest that this nonthermal component originates in a large population of young SNRs associated with recent star formation. Candidates for radio supernovae appear in several galaxies, including a candidate for SN 1986L in M83. Weak nonthermal core sources, similar to the Galactic center source Sgr A(*), may be present in four of the galaxies. The estimated thermal fluxes indicate that many of the galaxies have significant Lyman continuum fluxes in their cores, N(Lyc)similar to 10(51)-10(53) S-1, corresponding to OB luminosities of 2 x 10(8) L(.) to 5 x 10(9) L(.), generally consistent with observed far-infrared luminosities. Recent star formation appears to dominate both infrared and radio continuum fluxes in these galaxies. We present maps of the separated thermal and nonthermal emission for the starburst sources in Maffei 2 and M83. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP TURNER, JL (reprint author), UNIV CALIF LOS ANGELES, DEPT ASTRON, LOS ANGELES, CA 90024 USA. NR 132 TC 129 Z9 130 U1 0 U2 0 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 20 PY 1994 VL 421 IS 1 BP 122 EP 139 DI 10.1086/173631 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU449 UT WOS:A1994MU44900013 ER PT J AU KUIJKEN, K TREMAINE, S AF KUIJKEN, K TREMAINE, S TI ON THE ELLIPTICITY OF THE GALACTIC DISK SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, FUNDAMENTAL PARAMETERS; GALAXY, HALO; GALAXY, KINEMATICS AND DYNAMICS; GALAXY, STRUCTURE; SOLAR NEIGHBORHOOD ID ROTATION CURVE; MILKY-WAY; MAGELLANIC STREAM; MASS-DISTRIBUTION; TIMING ARGUMENT; LOCAL GROUP; GALAXY; HALO; SATELLITES; MOTION AB We investigate two kinds of constraints on the ellipticity of the Galactic disk: local constraints, based on the kinematics of the solar neighborhood (such as the Oort constants, the axis ratio of the velocity ellipsoid, the vertex deviation, and the radial velocity of the local standard of rest relative to the Galactic center), and global constraints (H I tangent point velocities, the velocity fields of distant carbon stars, Cepheids, and H II regions, and the kinematics of distant H I). Local and global constraints independently suggest that the Sun lies near the minor axis of the potential of an elliptical Galactic disk, with equipotential axis ratio 0.9. The kinematic data are consistent with a flat rotation curve of constant ellipticity, with a mean rotation speed of 200 km s(-1). In this model, the present velocity of the local standard of rest is 180 km s(-1). C1 UNIV TORONTO, CANADIAN INST THEORET ASTROPHYS, TORONTO M5S 1A7, ON, CANADA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. RI Tremaine, Scott/M-4281-2015 OI Tremaine, Scott/0000-0002-0278-7180 NR 44 TC 89 Z9 91 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1994 VL 421 IS 1 BP 178 EP 194 DI 10.1086/173635 PN 1 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU449 UT WOS:A1994MU44900017 ER PT J AU CASELLI, P HASEGAWA, TI HERBST, E AF CASELLI, P HASEGAWA, TI HERBST, E TI THE PRODUCTION OF CONDENSED-PHASE CO IN QUIESCENT MOLECULAR CLOUDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE DUST, EXTINCTION; ISM, CLOUDS; ISM, MOLECULES; MOLECULAR PROCESSES ID DENSE INTERSTELLAR CLOUDS; CHEMISTRY AB The high abundance of condensed phase CO in cool quiescent molecular clouds is not reproducible by our standard two-phase and three-phase gas-grain chemical models. We consider changes to the models designed to enhance the predicted abundance of condensed phase CO. We find that the use of the so-called ''highmetal'' elmental abundances to describe the initial composition of the gas leads to higher condensed phase CO abundances, which are in better agreement with observation, by reducing the surface hydrogenation rate of CO into methanol (CH3OH). We also confirm, however, that high-metal elemental abundances depress the gas phase production of complex organic molecules. This problem can be removed by using initial conditions with metallic elements, especially sulfur, predominantly on grain surfaces rather than in the gas. C1 ST MARYS UNIV,DEPT ASTRON,HALIFAX B3H 3C3,NS,CANADA. OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210. RP CASELLI, P (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,MS 42,CAMBRIDGE,MA 02138, USA. NR 14 TC 22 Z9 22 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1994 VL 421 IS 1 BP 206 EP 210 DI 10.1086/173637 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU449 UT WOS:A1994MU44900019 ER PT J AU HABBAL, SR ESSER, R AF HABBAL, SR ESSER, R TI ON THE DERIVATION OF EMPIRICAL LIMITS ON THE HELIUM ABUNDANCE IN CORONAL HOLES BELOW 1.5 R-CIRCLE-DOT SO ASTROPHYSICAL JOURNAL LA English DT Article DE SOLAR WIND; SUN, ABUNDANCES; SUN, CORONA ID SOLAR-WIND; EXPANSION; MODEL AB We present a simple technique describing how limits on the helium abundance, alpha, defined as the ratio of helium to proton number density, can be inferred from measurements of the electron density and temperature below 1.5 R.. As an illustration, we apply this technique to two different data sets: emission-line intensities in the extreme ultraviolet (EUV) and white-light observations, both measured in polar coronal holes. For the EUV data, the temperature gradient is derived from line intensity ratios, and the density gradient is replaced by the gradient of the line intensity. The lower limit on alpha derived from these data is 0.2-0.3 at I R. and drops very sharply to interplanetary values of a few percent below 1.06 R.. The white-light observations yield density gradients in the inner corona beyond 1.25 R. but do not have corresponding temperature gradients. In this case we consider an isothermal atmosphere, and derive an upper limit of 0.2 for alpha. These examples are used to illustrate how this technique could be applicable to the more extensive data to be obtained with the upcoming SOHO mission. Although only ranges on alpha can be derived, the application of the technique to data currently available merely points to the fact that alpha can be significantly large in the inner corona. RP HABBAL, SR (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS 15,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 12 TC 13 Z9 13 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1994 VL 421 IS 1 BP L59 EP L62 DI 10.1086/187187 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU450 UT WOS:A1994MU45000016 ER PT J AU JEFFERY, DJ KIRSHNER, RP CHALLIS, PM PUN, CSJ FILIPPENKO, AV MATHESON, T BRANCH, D CHEVALIER, RA FRANSSON, C PANAGIA, N WAGONER, RV WHEELER, JC CLOCCHIATTI, A AF JEFFERY, DJ KIRSHNER, RP CHALLIS, PM PUN, CSJ FILIPPENKO, AV MATHESON, T BRANCH, D CHEVALIER, RA FRANSSON, C PANAGIA, N WAGONER, RV WHEELER, JC CLOCCHIATTI, A TI A HUBBLE-SPACE-TELESCOPE ULTRAVIOLET-SPECTRUM OF SN 1993J SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; STARS, ATMOSPHERES; SUPERNOVAE, INDIVIDUAL (SN 1993J); ULTRAVIOLET, STARS ID LARGE MAGELLANIC CLOUD; SUPERNOVAE; EXTINCTION AB We obtained a Hubble Space Telescope ultraviolet spectrum of the Type II supernova SN 1993J in M81 on 1993 April 15. The similar to 1650-2900 Angstrom region is smoother than observed for SN 1987A and SN 1992A and lacks strong P Cygni absorptions caused by iron peak element lines. Synthetic spectra calculated using a parameterized LTE procedure and a simple model atmosphere do not fit the UV region. Radio observations suggest that SN 1993J is embedded in a thick circumstellar envelope. The UV spectra of other supernovae that are believed to have thick circumstellar envelopes also have similar to 1650-2900 Angstrom regions lacking in strong P Cygni absorptions. Interaction of supernova ejecta and circumstellar matter may cause the smooth UV spectrum. If so, UV observations of supernovae will provide insight into the circumstellar environment of the supernova progenitors. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF BERKELEY,CTR PARTICLE PHYS,BERKELEY,CA 94720. UNIV OKLAHOMA,DEPT PHYS & ASTRON,NORMAN,OK 73019. UNIV VIRGINIA,DEPT ASTRON,CHARLOTTESVILLE,VA 22903. STOCKHOLM OBSERV,S-13336 SALTSJOBADEN,SWEDEN. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. STANFORD UNIV,CTR SPACE SCI & ASTROPHYS,STANFORD,CA 94305. UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712. RP JEFFERY, DJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS-19,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 27 TC 36 Z9 36 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1994 VL 421 IS 1 BP L27 EP L30 DI 10.1086/187179 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU450 UT WOS:A1994MU45000008 ER PT J AU ROETTIGER, K BURNS, JO CLARKE, DA CHRISTIANSEN, WA AF ROETTIGER, K BURNS, JO CLARKE, DA CHRISTIANSEN, WA TI RELIC RADIO-EMISSION IN 3C 388 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (3C 388); GALAXIES, JETS; RADIO CONTINUUM, GALAXIES ID GALAXIES; POLARIZATION; 3C-219; JETS AB New VLA images of the radio galaxy 3C 388 have revealed an intriguing distribution of spectral indices which is quite different from that of typical classical double sources. We observe two distinct regions of emission separated by a well-defined transition layer delineated by a dramatic jump in the spectral index, particularly in the eastern lobe. We interpret these data as evidence of at least two distinct epochs of jet activity in which the current jets have resumed penetration of the IGM and are inflating younger, more energetic lobes into the relic lobes of the previous epoch. To the best of our knowledge, 3C 388 is the first radio galaxy in which multiple epochs of activity are clearly visible in the large-scale radio structure. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV N CAROLINA,DEPT PHYS & ASTRON,CHAPEL HILL,NC 27514. RP ROETTIGER, K (reprint author), NEW MEXICO STATE UNIV,DEPT ASTRON,LAS CRUCES,NM 88003, USA. NR 24 TC 29 Z9 29 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1994 VL 421 IS 1 BP L23 EP L26 DI 10.1086/187178 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MU450 UT WOS:A1994MU45000007 ER PT J AU VOGELEY, MS PARK, C GELLER, MJ HUCHRA, JP GOTT, JR AF VOGELEY, MS PARK, C GELLER, MJ HUCHRA, JP GOTT, JR TI TOPOLOGICAL ANALYSIS OF THE CFA REDSHIFT SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS; SURVEYS ID LARGE-SCALE STRUCTURE; DIFFERENTIAL MICROWAVE RADIOMETER; PISCES-PERSEUS SUPERCLUSTER; LUMINOSITY FUNCTION; GALAXIES; UNIVERSE; STATISTICS; EVOLUTION; MAPS AB We study the topology of large-scale structure in the Center for Astrophysics Redshift Survey, which now includes similar to 12,000 galaxies with limiting magnitude m(B) less than or equal to 15.5. The dense sampling and large volume of this survey allow us to compute the topology on smoothing scales from 6 to 20 h(-1) Mpc; we thus examine the topology of structure in both the ''nonlinear'' and ''linear'' regimes. On smoothing scales less than or equal to 10 h(-1) Mpc this sample has 3 times the number of resolution elements of samples examined in previous studies. Isodensity surfaces of the smoothed galaxy density field demonstrate that coherent high-density structures and large voids dominate the galaxy distribution. We compute the genus-threshold density relation for isodensity surfaces of the CfA survey. To quantify phase correlation in these data, we compare the CfA genus with the genus of realizations of Gaussian random fields with the power spectrum measured for the CfA survey. On scales less than or equal to 10 h(-1) Mpc the observed genus amplitude is smaller than random phase (96% confidence level). This decrement reflects the degree of phase coherence in the observed galaxy distribution. In other words the genus amplitude on these scales is not a good measure of the power spectrum slope. On scales greater than 10 h(-1) Mpc, where the galaxy distribution is roughly in the ''linear'' regime, the genus amplitude is consistent with the random phase amplitude. The shape of the genus curve reflects the strong coherence in the observed structure; the observed genus curve appears broader than random phase (94% confidence level for smoothing scales less than or equal to 10 h(-1) Mpc) because the topology is spongelike over a very large range of density threshold. This departure from random phase is consistent with a distribution like a filamentary net or ''walls with holes.'' On smoothing scales approaching similar to 20 h(-1) Mpc the shape of the CfA genus curve is consistent with random phase. There is very weak evidence for a shift of the genus toward a ''bubble-like'' topology. To test cosmological models, we compute the genus for mock CfA surveys drawn from large (L greater than or similar to 400 h(-1) Mpc) N-body simulations of three variants of the cold dark matter (CDM) cosmogony. The genus amplitude of the ''standard'' CDM model (Omega h=0.5, b=1.5) differs from the observations (96% confidence level) on smoothing scales less than or similar to 10 h(-1) Mpc. An open CDM model ((Omega h=0.2) and a CDM model with nonzero cosmological constant (Omega h=0.24, lambda(0)=0.6) are consistent with the observed genus amplitude over the full range of smoothing scales. All of these models fail (97% confidence level) to match the broadness of the observed genus curve on smoothing scales less than or equal to 10 h(-1) Mpc. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SEOUL NATL UNIV,DEPT ASTRON,SEOUL 151,SOUTH KOREA. PRINCETON UNIV,DEPT ASTROPHYS SCI,PRINCETON,NJ 08544. NR 55 TC 103 Z9 103 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1994 VL 420 IS 2 BP 525 EP 544 DI 10.1086/173583 PN 1 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MQ448 UT WOS:A1994MQ44800010 ER PT J AU SMITH, HA BECK, SC AF SMITH, HA BECK, SC TI THE STRUCTURE AND NATURE OF NGC-2071 IRS 1 - HIGH-RESOLUTION RADIO-CONTINUUM MAPS SO ASTROPHYSICAL JOURNAL LA English DT Article DE DUST, EXTINCTION; INFRARED, STARS; ISM, INDIVIDUAL (L1630); OPEN CLUSTERS AND ASSOCIATIONS, INDIVIDUAL (NGC 2071); RADIO CONTINUUM, INTERSTELLAR ID T-TAURI STARS; MOLECULAR CLOUD; VLA OBSERVATIONS; INFRARED SOURCES; STELLAR OBJECTS; L1551 IRS-5; NGC-2071; EMISSION; JETS; YOUNG AB We have observed the star formation cluster NGC 2071 IRS 1, 2, and 3, with 0(R).14 spatial resolution at 2 cm. The strong source IRS 1 breaks up into a bright peak sitting on a narrow line of emission extending over about 400 AU, with three much weaker peaks. This ridge, which has a p.a.=100 degrees, is not aligned with any of the other structures that have previously been seen around IRS 1: its orientation is about 55 degrees from the CO outflow direction, and 35 degrees from a hypothetical disk direction. The spectral and spatial results, combined with earlier radio and infrared observations, indicate that most likely the radio and infrared emission from the exciting source, IRS 1, is produced by a dense wind hidden by at least 100 visual magnitudes of extinction; the extended ridge of emission comes from an optically thin H II region with characteristic dimensions of similar to 400 AU and which may result from a clumpy distribution of local gas and dust. C1 TEL AVIV UNIV,WISE OBSERV,IL-66978 RAMAT AVIV,ISRAEL. TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-66978 RAMAT AVIV,ISRAEL. RP SMITH, HA (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20560, USA. NR 29 TC 8 Z9 8 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1994 VL 420 IS 2 BP 643 EP 648 DI 10.1086/173592 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MQ448 UT WOS:A1994MQ44800019 ER PT J AU HESTER, JJ RAYMOND, JC BLAIR, WP AF HESTER, JJ RAYMOND, JC BLAIR, WP TI THE BALMER-DOMINATED NORTHEAST LIMB OF THE CYGNUS LOOP SUPERNOVA REMNANT SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (CYGNUS LOOP); ISM, KINEMATICS AND DYNAMICS; SUPERNOVA REMNANTS ID FAST SHOCK-WAVE; HOPKINS-ULTRAVIOLET-TELESCOPE; INTER-STELLAR MEDIUM; OPTICAL-EMISSION; EINSTEIN OBSERVATIONS; RADIATIVE SHOCKS; FE-X; PRECURSORS; DYNAMICS; SPECTRUM AB We present a comprehensive investigation of the Balmer-dominated northeast limb of the Cygnus Loop supernova remnant. Data presented include Ha; CO mi, and X-ray images, UV and visible spectrophotometry, and high-resolution spectroscopy. The two relatively bright Balmer-dominated filaments visible on the POSS prints are seen to be part of a very smooth and regular complex of filaments. These filaments mark the current location of the blast wave and are seen to bound the sharply limb-brightened X-ray emission,,including the previously reported X-ray ''halo.'' The [O m]/H beta ratio throughout the region is similar to 0.1, except for regions in which the shock is undergoing a transition from nonradiative to incomplete radiative conditions. At these locations [O m] emission from the cooling region is quite strong, while collisionally excited Balmer-line emission can be weak because of photoionization of the preshock medium by UV from the nascent cooling region. As a result [O m]/H beta > 100 in some locations. The nonradiative/radiative transition is best studied along the length of the northwestern of the two brightest filaments, where the shock velocity and swept-up column go from similar to 180 km s(-1) and 10(17) cm(-2) at one end to similar to 140 km s(-1) and 8 x 10(17) cm(-2) at the other. There ate also a number of locations of such incomplete radiative emission where the shock has recently encountered denser regions with characteristic sizes of similar to 10(18) Cm. There is a considerable amount of evidence that the shock has decelerated from similar to 400 km s(-1) to less than 200 km s(-1) in the last 1000 yr. We interpret this as the result of the blast wave hitting the wall of a cavity which surrounded the supernova precursor and succeed in matching a wide range of data with a reflected shock model in which the density of the cavity wall is similar to 1.2 cm(-3) and the density in the interior of the cavity is about 0.09 cm(-3). This analysis supports previous suggestions that the Cygnus Loop was a cavity explosion. We predict that the X-ray shell will continue to brighten for the next 1000 years or so, during which time the shock front win become radiative throughout the northeast region. The similarity of the time scales. for postshock cooling, shock deceleration, and the pressure evolution of the region violates assumptions of steady flow, and greatly complicates interpretation of shock spectra in the region. This may be a common and important effect in many supernova remnants. High-resolution spectroscopy of the Ha line profile shows that the broad component is surprisingly narrow (similar to 130 km s(-1)). Consistency between this line width and the shock velocity inferred from spectrophotometry requires either rapid postshock equilibration of T-i and T-e, or that the shock front has decelerated from 180 km (-1) to 150 km s(-1) in the last similar to 200 yr. While we cannot unambiguously distinguish between these models, the required deceleration is consistent with extrapolation of the shock deceleration rate inferred over the last 1000 years. The width of the narrow component of the Ha line profile is similar to 33 km s(-1), which indicates that the preshock medium has been heated to similar to 25,000 K by a shock precursor. The most promising types of precursor are heating either by fast neutrals which overtake the shock or by cosmic rays. In the latter case the observed properties of the precursor constrain the cosmic-ray diffusion coefficient to be between about 10(23) cm(2) s(-1) and 10(25) Cm-2 s(-1). The characteristics of the precursor seem to be about right to explain the presence of weak [S II] and [N II] emission previously reported by Fesen & Itoh (1985). Morphologically peculiar emission located between the Balmer-dominated filaments and the radiative northeast limb consists of radiative shocks which are less well ordered than the Balmer-dominated region. Interpretation of echelle data gives pv(s)(2) approximate to 4.3 x 10(-10) dyn, cm(-2) for this region, intermediate between the current pressure inferred for the Balmer-dominated shocks and the pressure prior to the blast wave/cavity wall encounter. The morphology of the region may be due to dynamical instabilities in the how around the edges of the cloud responsible for the bright radiative northeast limb. Alternatively, it may represent a phase in the transition of the blast wave from nonradiative to fully radiative during which thermal instabilities are important. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,CTR ASTROPHYS SCI,BALTIMORE,MD 21218. RP HESTER, JJ (reprint author), ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287, USA. NR 62 TC 125 Z9 125 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1994 VL 420 IS 2 BP 721 EP 745 DI 10.1086/173598 PN 1 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MQ448 UT WOS:A1994MQ44800025 ER PT J AU IMAMOGLU, A YAMAMOTO, Y AF IMAMOGLU, A YAMAMOTO, Y TI TURNSTILE DEVICE FOR HERALDED SINGLE PHOTONS - COULOMB-BLOCKADE OF ELECTRON AND HOLE TUNNELING IN QUANTUM-CONFINED P-I-N HETEROJUNCTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID JUNCTIONS; INTERFERENCE; OSCILLATIONS AB We show that if a double-barrier mesoscopic p-i-n heterojunction is driven by an alternating voltage source, then Coulomb blockade and quantum confinement effects together can suppress the quantum fluctuations usually associated with electron and hole injection processes in semiconductors. It is therefore possible to generate heralded single-photon states without the need for a high-impedance current source. Since the frequency of the alternating voltage source determines the repetition rate of the single-photon states and the magnitude of the junction current, the present scheme promises high precision photon-flux and current standards. C1 STANFORD UNIV, EL GINZTON LAB, STANFORD, CA 94305 USA. NIPPON TELEGRAPH & TEL PUBL CORP, BASIC RES LABS, MUSASHINO, TOKYO 180, JAPAN. RP IMAMOGLU, A (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, 60 GARDEN ST, MS 14, CAMBRIDGE, MA 02138 USA. RI Yamamoto, Yoshihisa/A-2811-2012 NR 21 TC 143 Z9 147 U1 1 U2 21 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 10 PY 1994 VL 72 IS 2 BP 210 EP 213 DI 10.1103/PhysRevLett.72.210 PG 4 WC Physics, Multidisciplinary SC Physics GA MQ607 UT WOS:A1994MQ60700009 ER PT J AU CHANTELL, M WEEKES, TC SARAZIN, X URBAN, M AF CHANTELL, M WEEKES, TC SARAZIN, X URBAN, M TI ANTIMATTER AND THE MOON SO NATURE LA English DT Letter C1 ECOLE POLYTECH,IN2P3,CNRS,LPNHE,F-91128 PALAISEAU,FRANCE. RP CHANTELL, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,WHIPPLE OBSERV,POB 97,AMADO,AZ 85645, USA. NR 5 TC 4 Z9 4 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 6 PY 1994 VL 367 IS 6458 BP 25 EP 25 DI 10.1038/367025a0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MP865 UT WOS:A1994MP86500035 ER PT J AU GILLESPIE, LJ NOWICKE, JW AF GILLESPIE, LJ NOWICKE, JW TI SYSTEMATIC IMPLICATIONS OF POLLEN MORPHOLOGY IN GNETUM SO ACTA BOTANICA GALLICA LA English DT Article; Proceedings Paper CT 8th International Palynological Conference CY SEP 06-12, 1992 CL AIX EN PROVENCE, FRANCE DE GNETALES; GNETUM; POLLEN; EPHEDRA; WELWITSCHIA AB Pollen morphology of the gymnosperm Gnetum was studied to determine its systematic significance. Pollen is spheroidal, inaperturate and spinose or spinulose. Two distinct types are found in the genus, with Asian species characterized by one type and neotropical and African species by a second. Pollen morphology does not support the present subdivision of Gnetum into two sections, Gnetum and Cylindrostachys. The spinose or spinulose pollen of Gnetum is unique among gymnosperms and is very different from the polyplicate pollen of the other Gnetales, Ephedra and Welwitschia. RP GILLESPIE, LJ (reprint author), SMITHSONIAN INST,DEPT BOT,NHB 166,WASHINGTON,DC 20560, USA. NR 0 TC 11 Z9 12 U1 1 U2 7 PU SOC BOTANIQUE FRANCE PI CHATENAY-MALABRY CEDEX PA RUE J B CLEMENT, 92296 CHATENAY-MALABRY CEDEX, FRANCE SN 1253-8078 J9 ACTA BOT GALLICA JI Acta Bot. Gall. PY 1994 VL 141 IS 2 BP 131 EP 139 PG 9 WC Plant Sciences SC Plant Sciences GA PU504 UT WOS:A1994PU50400004 ER PT B AU GEARY, JC LUPPINO, GA AF GEARY, JC LUPPINO, GA BE Ealey, MA Merkle, F TI NEW CIRCULAR RADIAL-SCAN FRAME-STORAGE CCDS FOR LOW-ORDER ADAPTIVE OPTICS WAVE-FRONT CURVATURE SENSING SO ADAPTIVE OPTICS IN ASTRONOMY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Adaptive Optics in Astronomy CY MAR 17-18, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1496-4 J9 P SOC PHOTO-OPT INS PY 1994 VL 2201 BP 588 EP 595 DI 10.1117/12.176093 PG 8 WC Astronomy & Astrophysics; Optics SC Astronomy & Astrophysics; Optics GA BA83N UT WOS:A1994BA83N00058 ER PT B AU GEARY, JC AF GEARY, JC BE Ealey, MA Merkle, F TI RAPID-FRAMING CCDS WITH 16 OUTPUT PORTS FOR LASER GUIDE STAR SENSORS SO ADAPTIVE OPTICS IN ASTRONOMY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Adaptive Optics in Astronomy CY MAR 17-18, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1496-4 J9 P SOC PHOTO-OPT INS PY 1994 VL 2201 BP 607 EP 612 DI 10.1117/12.176095 PG 6 WC Astronomy & Astrophysics; Optics SC Astronomy & Astrophysics; Optics GA BA83N UT WOS:A1994BA83N00060 ER PT B AU FATA, R FABRICANT, D AF FATA, R FABRICANT, D BE Stepp, LM TI THE DESIGN AND SUPPORT OF THE 1.7M F/5 SECONDARY MIRROR FOR THE MMT CONVERSION SO ADVANCED TECHNOLOGY OPTICAL TELESCOPES V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technology Optical Telescopes V CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1494-8 J9 P SOC PHOTO-OPT INS PY 1994 VL 2199 BP 580 EP 592 DI 10.1117/12.176226 PG 13 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BA90B UT WOS:A1994BA90B00054 ER PT S AU DALGARNO, A AF DALGARNO, A BE Bederson, B Dalgarno, A TI TERRESTRIAL AND EXTRATERRESTRIAL H-3(+) SO ADVANCES IN ATOMIC, MOLECULAR, AND OPTICAL PHYSICS, VOL 32 SE Advances In Atomic Molecular and Optical Physics LA English DT Review ID INFRARED PREDISSOCIATION SPECTRUM; 1ST PRINCIPLES CALCULATIONS; DENSE INTERSTELLAR CLOUDS; SYMMETRY-ADAPTED METHOD; H-3+ MOLECULAR ION; DISSOCIATIVE-RECOMBINATION; MU-M; LABORATORY OBSERVATION; EQUILIBRIUM-CONSTANTS; PARTITION-FUNCTIONS RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 107 TC 58 Z9 58 U1 0 U2 4 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA SN 1049-250X BN 0-12-003832-3 J9 ADV ATOM MOL OPT PHY JI Adv. Atom. Mol. Opt. Phys. PY 1994 VL 32 BP 57 EP 68 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Optics; Physics GA BA09C UT WOS:A1994BA09C00004 ER PT B AU GRAESSLE, DE BURBINE, TH FITCH, JJ PODGORSKI, W JUDA, JZ ELSNER, RF ODELL, SL REYNOLDS, JM AF GRAESSLE, DE BURBINE, TH FITCH, JJ PODGORSKI, W JUDA, JZ ELSNER, RF ODELL, SL REYNOLDS, JM BE Hoover, RB Walker, ABC TI MOLECULAR CONTAMINATION STUDY OF IRIDIUM-COATED X-RAY MIRRORS SO ADVANCES IN MULTILAYER AND GRAZING INCIDENCE X-RAY/EUV/FUV OPTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics CY JUL 24-26, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE MOLECULAR CONTAMINATION; IRIDIUM X-RAY REFLECTANCE; GRAZING INCIDENCE; X-RAY MIRRORS; AXAF CALIBRATION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 6 Z9 6 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1603-7 J9 P SOC PHOTO-OPT INS PY 1994 VL 2279 BP 12 EP 26 DI 10.1117/12.193173 PG 15 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BC27K UT WOS:A1994BC27K00002 ER PT B AU JOENSEN, KD GORENSTEIN, P WOOD, J CHRISTENSEN, FE HOGHOJ, P AF JOENSEN, KD GORENSTEIN, P WOOD, J CHRISTENSEN, FE HOGHOJ, P BE Hoover, RB Walker, ABC TI PRELIMINARY RESULTS OF A FEASIBILITY STUDY FOR A HARD X-RAY KIRKPATGRICK-BAEZ TELESCOPE SO ADVANCES IN MULTILAYER AND GRAZING INCIDENCE X-RAY/EUV/FUV OPTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics CY JUL 24-26, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE HARD X-RAY; X-RAY TELESCOPE; MULTILAYER; UNIFORMITY; PRODUCTION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 17 Z9 17 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1603-7 J9 P SOC PHOTO-OPT INS PY 1994 VL 2279 BP 180 EP 189 DI 10.1117/12.193133 PG 10 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BC27K UT WOS:A1994BC27K00018 ER PT J AU ARNOLDI, MJ AF ARNOLDI, MJ TI POLITICAL-HISTORY AND SOCIAL COMMENTARY IN MALIAN SOGOBO THEATER SO AFRICA TODAY LA English DT Article RP ARNOLDI, MJ (reprint author), SMITHSONIAN INST,DEPT ANTHROPOL,NHB 112,WASHINGTON,DC 20560, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU LYNNE RIENNER PUBL INC PI BOULDER PA 1800 30TH ST SUITE 314, BOULDER, CO 80301 SN 0001-9887 J9 AFR TODAY JI Afr. Today PY 1994 VL 41 IS 2 BP 39 EP 49 PG 11 WC Area Studies; Political Science SC Area Studies; Government & Law GA PL037 UT WOS:A1994PL03700004 ER PT J AU MONTALI, RJ AF MONTALI, RJ BE Junge, RE TI DISEASES OF ZOO MARMOSETS, TAMARINS AND GOELDIS MONKEYS SO AMERICAN ASSOCIATION OF ZOO VETERINARIANS AND ASSOCIATION OF REPTILIAN AND AMPHIBIAN VETERINARIANS ANNUAL CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT Annual Conference of the American-Association-of-Zoo-Veterinarians/Association-of-Reptilian-and-A mphibian-Veterinarians CY OCT 22-27, 1994 CL PITTSBURGH, PA SP AMER ASSOC ZOO VETERINARIANS, ASSOC REPTILIAN AND AMPHIBIAN VETERINARIANS C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ZOO VETERINARIANS WILBUR B ARMAND EXEC DIRECTOR PI PHILADELPHIA PA 34TH ST & GIRARD AVE, PHILADELPHIA, PA 19104 PY 1994 BP 237 EP 240 PG 4 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA BB99F UT WOS:A1994BB99F00067 ER PT J AU DUNCAN, M NICHOLS, DK MONTALI, RJ THOMAS, LA AF DUNCAN, M NICHOLS, DK MONTALI, RJ THOMAS, LA BE Junge, RE TI AN EPIZOOTIC OF SALMONELLA-ENTERITIDIS AT THE NATTIONAL-ZOOLOGICAL-PARK SO AMERICAN ASSOCIATION OF ZOO VETERINARIANS AND ASSOCIATION OF REPTILIAN AND AMPHIBIAN VETERINARIANS ANNUAL CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT Annual Conference of the American-Association-of-Zoo-Veterinarians/Association-of-Reptilian-and-A mphibian-Veterinarians CY OCT 22-27, 1994 CL PITTSBURGH, PA SP AMER ASSOC ZOO VETERINARIANS, ASSOC REPTILIAN AND AMPHIBIAN VETERINARIANS C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ZOO VETERINARIANS WILBUR B ARMAND EXEC DIRECTOR PI PHILADELPHIA PA 34TH ST & GIRARD AVE, PHILADELPHIA, PA 19104 PY 1994 BP 246 EP 248 PG 3 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA BB99F UT WOS:A1994BB99F00070 ER PT J AU OFTEDAL, OT ALLEN, ME CHUNG, AL REED, RC ULLREY, DE AF OFTEDAL, OT ALLEN, ME CHUNG, AL REED, RC ULLREY, DE BE Junge, RE TI NUTRITION, URATES, AND DESERT SURVIVAL - POTASSIUM AND THE DESERT TORTOISE (GOPHERUS-AGASSIZII) SO AMERICAN ASSOCIATION OF ZOO VETERINARIANS AND ASSOCIATION OF REPTILIAN AND AMPHIBIAN VETERINARIANS ANNUAL CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT Annual Conference of the American-Association-of-Zoo-Veterinarians/Association-of-Reptilian-and-A mphibian-Veterinarians CY OCT 22-27, 1994 CL PITTSBURGH, PA SP AMER ASSOC ZOO VETERINARIANS, ASSOC REPTILIAN AND AMPHIBIAN VETERINARIANS C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ZOO VETERINARIANS WILBUR B ARMAND EXEC DIRECTOR PI PHILADELPHIA PA 34TH ST & GIRARD AVE, PHILADELPHIA, PA 19104 PY 1994 BP 308 EP 313 PG 6 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA BB99F UT WOS:A1994BB99F00084 ER PT B AU MONTALI, RJ TELL, L BUSH, M CAMBRE, RC KENNY, D SUTHERLANDSMITH, M APPEL, MJG AF MONTALI, RJ TELL, L BUSH, M CAMBRE, RC KENNY, D SUTHERLANDSMITH, M APPEL, MJG BE Junge, RE TI VACCINATION AGAINST CANINE DISTEMPER IN EXOTIC CARNIVORES - SUCCESSES AND FAILURES SO AMERICAN ASSOCIATION OF ZOO VETERINARIANS AND ASSOCIATION OF REPTILIAN AND AMPHIBIAN VETERINARIANS ANNUAL CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT Annual Conference of the American-Association-of-Zoo-Veterinarians/Association-of-Reptilian-and-A mphibian-Veterinarians CY OCT 22-27, 1994 CL PITTSBURGH, PA SP AMER ASSOC ZOO VETERINARIANS, ASSOC REPTILIAN AND AMPHIBIAN VETERINARIANS C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER ASSOC ZOO VETERINARIANS WILBUR B ARMAND EXEC DIRECTOR PI PHILADELPHIA PA 34TH ST & GIRARD AVE, PHILADELPHIA, PA 19104 PY 1994 BP 340 EP 344 PG 5 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA BB99F UT WOS:A1994BB99F00093 ER PT J AU LELLINGER, DB AF LELLINGER, DB TI TRICHOMANES-RIGIDUM VERSUS TRICHOMANES-CUPRESSOIDES SO AMERICAN FERN JOURNAL LA English DT Note RP LELLINGER, DB (reprint author), SMITHSONIAN INST,US NATL HERBARIUM,MRC-166,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER FERN SOC INC PI WASHINGTON PA C/O DAVID B LELLINGER, SMITHSONIAN INST, BOTANY DEPT, WASHINGTON, DC 20560 SN 0002-8444 J9 AM FERN J JI Am. Fern J. PD JAN-MAR PY 1994 VL 84 IS 1 BP 4 EP 4 DI 10.2307/1547551 PG 1 WC Plant Sciences SC Plant Sciences GA ND820 UT WOS:A1994ND82000002 ER PT J AU HORSECAPTURE, GP AF HORSECAPTURE, GP TI FROM THE RESERVATION TO THE SMITHSONIAN VIA ALCATRAZ SO AMERICAN INDIAN CULTURE AND RESEARCH JOURNAL LA English DT Article RP HORSECAPTURE, GP (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER INDIAN,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALIFORNIA AMER INDIAN STUDIES CENTER PI LOS ANGELES PA 3220 CAMPBELL HALL 406 HILGARD AVE SUBSCRIBER #1695, LOS ANGELES, CA 90024-1548 SN 0161-6463 J9 AM INDIAN CULT RES J JI Am. Indian Cult. Res. J. PY 1994 VL 18 IS 4 BP 135 EP 149 PG 15 WC History SC History GA QJ920 UT WOS:A1994QJ92000012 ER PT J AU CIPOLLINI, ML WHIGHAM, DF AF CIPOLLINI, ML WHIGHAM, DF TI SEXUAL DIMORPHISM AND COST OF REPRODUCTION IN THE DIOECIOUS SHRUB LINDERA BENZOIN (LAURACEAE) SO AMERICAN JOURNAL OF BOTANY LA English DT Article ID FRUIT PRODUCTION; NEOTROPICAL HERB; OEMLERIA-CERASIFORMIS; POLLINATOR LIMITATION; RESOURCE LIMITATION; CHAMAELIRIUM-LUTEUM; POPULATION BIOLOGY; FEMALE PLANTS; RUMEX-ACETOSA; PATH-ANALYSIS AB We examined sexual dimorphism in reproductive allocation and its effects on growth and subsequent reproduction in a natural population of the dioecious woody shrub Lindera benzoin (L.) Blume. In addition to comparing natural patterns of growth and reproduction in a marked population of 251 females and 87 males, we experimentally examined the effect of reduced reproduction on future growth and reproduction in female plants and examined sexual dimorphism in carbon/nutrient balance. Our results suggest that females of L. benzoin bear greater reproductive costs in terms of both biomass and minerals. These costs were measurable in terms of current biomass and allocation of nitrogen to reproduction, as well as subsequent growth, reproduction, and tissue carbon/nutrient balance. Based upon the results of a fruit-thinning experiment and path analysis, fruit production in 1991 appeared to have direct negative effects on fruit production in 1992, an effect that was not necessarily mediated through effects on plant growth. We discuss our results in the context of other intrinsic and extrinsic factors that can influence growth, reproductive costs, and mortality in this species. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. OI Whigham, Dennis/0000-0003-1488-820X NR 69 TC 103 Z9 122 U1 3 U2 27 PU BOTANICAL SOC AMER INC PI COLUMBUS PA OHIO STATE UNIV-DEPT BOTANY 1735 NEIL AVE, COLUMBUS, OH 43210 SN 0002-9122 J9 AM J BOT JI Am. J. Bot. PD JAN PY 1994 VL 81 IS 1 BP 65 EP 75 DI 10.2307/2445564 PG 11 WC Plant Sciences SC Plant Sciences GA MU541 UT WOS:A1994MU54100010 ER PT J AU DIETZ, JM BAKER, AJ MIGLIORETTI, D AF DIETZ, JM BAKER, AJ MIGLIORETTI, D TI SEASONAL-VARIATION IN REPRODUCTION, JUVENILE GROWTH, AND ADULT BODY-MASS IN GOLDEN LION TAMARINS (LEONTOPITHECUS-ROSALIA) SO AMERICAN JOURNAL OF PRIMATOLOGY LA English DT Article DE SEASONAL REPRODUCTION; GROWTH RATS; CALLITRICHIDAE; GOLDEN LION TAMARIN; POSTPARTUM ESTRUS ID SEXUAL DIMORPHISM; COTTON-TOP; SAGUINUS-FUSCICOLLIS; SQUIRREL-MONKEYS; BEHAVIOR; PATTERNS; MACAQUES; VARIABILITY; POPULATION; PRIMATES AB Data on the ecology, demography, and morphology of 465 golden lion tamarins in 22 wild groups suggest that avoidance of reproduction and weaning of infants during the dry season shaped the pattern of female reproduction. Post partum estrus may have evolved to allow females to produce and wean two successive litters during the 7-month season of abundant food resources. Support for these hypotheses includes observations that nearly all births, lactation, and weaning of infants occurred during the wet season, a period of relatively abundant trophic resources. Litter sizes in the wild were smaller than for the captive population. Evidence that food limitation may have a greater negative impact on young juveniles than lactating females includes observations that female weight did not decrease with lactation, and that many births occurred during the transition between dry and wet seasons. Juveniles gained less weight during the dry season than during the wet season; however, there was no significant difference between weights of adults born early vs, late in the wet season. For females producing two litters/year, litter size and infant mortality did not differ for litters born early and late in the wet season. Adult males gained weight before and lost weight during the month of highest probability of female estrus, suggesting that competition for mates is energetically expensive for males. Although resources were abundant, adult males did not gain weight during months when most infant carrying took place, suggesting that this activity is also energetically expensive. (C) 1994 Wiley-Liss, Inc. C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. PHILADELPHIA ZOOL GARDENS,PHILADELPHIA,PA. RP DIETZ, JM (reprint author), UNIV MARYLAND,DEPT ZOOL,COLLEGE PK,MD 20742, USA. NR 84 TC 74 Z9 76 U1 2 U2 34 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0275-2565 J9 AM J PRIMATOL JI Am. J. Primatol. PY 1994 VL 34 IS 2 BP 115 EP 132 DI 10.1002/ajp.1350340204 PG 18 WC Zoology SC Zoology GA PH345 UT WOS:A1994PH34500002 ER PT J AU HALLOY, M KLEIMAN, DG AF HALLOY, M KLEIMAN, DG TI ACOUSTIC STRUCTURE OF LONG CALLS IN FREE-RANGING GROUPS OF GOLDEN LION TAMARINS, LEONTOPITHECUS-ROSALIA SO AMERICAN JOURNAL OF PRIMATOLOGY LA English DT Note DE GOLDEN LION TAMARINS; LEONTOPITHECUS ROSALIA; LONG CALLS; ACOUSTIC STRUCTURE ID TAXONOMY; MONKEYS AB Like many other callitrichids, golden lion tamarins, Leontopithecus rosalia, emit Long Calls. Recordings of four free-ranging groups were made to explore different types of Long Calls. Three Long Call types were identified acoustically, and analyzed sonographically. The calls usually started with an Introductory Syllable (a chirp, a trill, or a whine) which was followed by either one, two, or three different phrases in a fixed sequential order. Each of the three phrases was unique and contained a typical number of syllables of characteristic shape, frequencies, and durations. Possible functions of these calls are discussed. (C) 1994 Wiley-Liss, Inc. C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. NR 19 TC 10 Z9 11 U1 0 U2 7 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0275-2565 J9 AM J PRIMATOL JI Am. J. Primatol. PY 1994 VL 32 IS 4 BP 303 EP 310 DI 10.1002/ajp.1350320407 PG 8 WC Zoology SC Zoology GA NB972 UT WOS:A1994NB97200006 ER PT J AU WRIGHT, SJ VANSCHAIK, CP AF WRIGHT, SJ VANSCHAIK, CP TI LIGHT AND THE PHENOLOGY OF TROPICAL TREES SO AMERICAN NATURALIST LA English DT Article ID COSTA-RICA; DRY FORESTS; SEASONAL DROUGHT; LOWLANDS; WET; PERIODICITY AB Tree phenologies from eight disparate tropical forests are consistent with the hypothesis that leaf and flower production have been selected to coincide with seasonal peaks of irradiance. C1 DUKE UNIV,DEPT BIOL ANTHROPOL & ANAT,DURHAM,NC 27705. RP WRIGHT, SJ (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO,AA 34002, USA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 46 TC 239 Z9 265 U1 4 U2 48 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0003-0147 J9 AM NAT JI Am. Nat. PD JAN PY 1994 VL 143 IS 1 BP 192 EP 199 DI 10.1086/285600 PG 8 WC Ecology; Evolutionary Biology SC Environmental Sciences & Ecology; Evolutionary Biology GA MV276 UT WOS:A1994MV27600008 ER PT J AU GARDINER, SL JONES, ML AF GARDINER, SL JONES, ML TI ON THE SIGNIFICANCE OF LARVAL AND JUVENILE MORPHOLOGY FOR SUGGESTING PHYLOGENETIC-RELATIONSHIPS OF THE VESTIMENTIFERA SO AMERICAN ZOOLOGIST LA English DT Article; Proceedings Paper CT Symposium on Evolutionary Morphology of Marine Invertebrate Larvae and Juveniles, at the Annual Meeting of the American-Society-of-Zoologists CY DEC 27-30, 1993 CL LOS ANGELES, CA SP AMER SOC ZOOLOGISTS ID RIFTIA-PACHYPTILA; TROPHOSOME AB Examination of larvae and juveniles of Ridgeia has revealed the presence of a prototroch, metatroch and neurotroch. A complete digestive tract is present in juveniles, the esophageal portion of which passes through the brain. The major longitudinal, pulsatile blood vessel is on the side opposite the nerve cord and, along with the longitudinal blood vessel adjacent to the nerve cord, is situated in the medial mesentery separating lateral coelomic cavities. The posterior body region is multisegmented, and the lateral cavities of each segment are separated by a medial mesentery. Newly forming segments exhibit paired spaces that expand to form coelomic cavities of that segment. All of these characters are held in common with the Annelida and strongly suggest that the nerve cord is ventral and the major pulsatile blood vessel is dorsal; the brain is, in effect, a circumesophageal ganglion; and coelom formation is by schizocoely and mesodermal origin is teloblastic. It is suggested that the Vestimentifera are allied with the gastroneuralians and may well have arisen near the base of the phylogenetic line leading to the Annelida. Avenues of future research, likely to shed more light on the position of the Vestimentifera in invertebrate phylogeny, are suggested. C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,WASHINGTON,DC 20560. RP GARDINER, SL (reprint author), BRYN MAWR COLL,DEPT BIOL,101 N MERION AVE,BRYN MAWR,PA 19010, USA. RI Huffstickler, John/H-1745-2011 NR 20 TC 17 Z9 17 U1 0 U2 0 PU AMER SOC ZOOLOGISTS PI LAWRENCE PA 1041 NEW HAMPSHIRE ST, LAWRENCE, KS 66044 SN 0003-1569 J9 AM ZOOL JI Am. Zool. PY 1994 VL 34 IS 4 BP 513 EP 522 PG 10 WC Zoology SC Zoology GA PX627 UT WOS:A1994PX62700005 ER PT B AU REASENBERG, RD BABCOCK, RW MURISON, MA NOECKER, MC PHILLIPS, JD SCHUMAKER, BL ULVESTAD, JS AF REASENBERG, RD BABCOCK, RW MURISON, MA NOECKER, MC PHILLIPS, JD SCHUMAKER, BL ULVESTAD, JS BE Breckinridge, JB TI POINTS - AN ASTROMETRIC SPACECRAFT WITH MULTIFARIOUS APPLICATIONS SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 6 Z9 6 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 2 EP 17 DI 10.1117/12.177228 PG 16 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00001 ER PT B AU ROSENBERG, RD BABCOCK, RW PHILLIPS, JD JOHNSTON, KJ SIMON, RS AF ROSENBERG, RD BABCOCK, RW PHILLIPS, JD JOHNSTON, KJ SIMON, RS BE Breckinridge, JB TI NEWCOMB, A SCIENTIFIC INTERFEROMETRY MISSION AT LOW-COST SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 18 EP 26 PG 9 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00002 ER PT B AU CARLETON, NP TRAUB, WA LACASSE, MG NISENSON, P PEARLMAN, MR REASENBERG, RD XU, XQ COLDWELL, C PANASYUK, A BENSON, JA PAPALIOLIOS, C PREDMORE, R SCHLOERB, FP DYCK, HM GIBSON, D AF CARLETON, NP TRAUB, WA LACASSE, MG NISENSON, P PEARLMAN, MR REASENBERG, RD XU, XQ COLDWELL, C PANASYUK, A BENSON, JA PAPALIOLIOS, C PREDMORE, R SCHLOERB, FP DYCK, HM GIBSON, D BE Breckinridge, JB TI CURRENT STATUS OF THE IOTA INTERFEROMETER SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 37 Z9 37 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 152 EP 165 DI 10.1117/12.177236 PG 14 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00016 ER PT B AU GREENHILL, LJ MORAN, JM BACKER, DC BESTER, M DANCHI, WC AF GREENHILL, LJ MORAN, JM BACKER, DC BESTER, M DANCHI, WC BE Breckinridge, JB TI CIRCUMSTELLAR ENVELOPE OF VX SGR RESOLVED WITH LONG-BASE-LINE INTERFEROMETRY AT MILLIMETER AND MIDINFRARED WAVELENGTHS SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 304 EP 315 DI 10.1117/12.177248 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00029 ER PT B AU MORAN, JM HO, PTP AF MORAN, JM HO, PTP BE Breckinridge, JB TI THE SMITHSONIAN SUBMILLIMETER WAVELENGTH ARRAY SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 335 EP 346 DI 10.1117/12.177251 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00032 ER PT B AU CHEIMETS, P AF CHEIMETS, P BE Breckinridge, JB TI DESIGN, AND TEST OF SUBMILLIMETER ARRAY (SMA) CHOPPING SUBREFLECTOR SO AMPLITUDE AND INTENSITY SPATIAL INTERFEROMETRY II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Amplitude and Intensity Spatial Interferometry II CY MAR 15-16, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRONOM SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1495-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2200 BP 347 EP 358 DI 10.1117/12.177252 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA83M UT WOS:A1994BA83M00033 ER PT J AU GILLESPIE, LJ AF GILLESPIE, LJ TI POLLEN MORPHOLOGY AND PHYLOGENY OF THE TRIBE PLUKENETIEAE (EUPHORBIACEAE) SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article ID DALECHAMPIA AB A scanning electron microscopy and light microscopy survey of pollen morphology in the Plukenetieae (Euphorbiaceae) was undertaken to help elucidate phylogenctic relationships within the tribe. Pollen is medium to large, spheroidal to suboblate, and tricolpate, inaperturate, or with poorly defined apertures. Subtribe Plukenetiinae is characterized by tricolpate pollen with uneven-margined colpi and a perforate to reticulate tectum. Pollen evidence supports a division betweeri genera having ari aborescent habit (Angostyles, Astrococcus, and Haematostemon) and those with a scandent habit (Plukenetia and Romanoa). The synonymy of the monotypic genera Vigia and Eleutherostigma with Plukenelia is also supported. Subtribe Tragiinae is exceptionally diverse in pollen morphology. Aperture condition ranges from tricolpate, the plesiomorphic and most common state, to weakly aperturate and inaperturate; islands, fragments, or strands of sexine are usually present on the apcrtural membrane, and aperture margins are uneven and often indistinct. Exirie sculpture is punctate, foveolate, reticulate, rugulate, or baculate. The large genus Tragia includes seven distinct pollen types, with most sections (e.g., Bia, Ctenomeria, Leptobotrys, Tragia, and Zuckertia, and also subgenus Mauroya) characterized by a uniform and unique pollen morphology, supporting the sectional classification of Tragia. The other Tragiinae genera have pollen distinct from Tragia, with the exception of Tragiella, which closely reserribtes sections Tagira and Lassia. Pollen evidence supports Cnesmone and Megistostigma as sister taxa, and suggests a close relationship with Pachystylidium. 4cidoton includes two different pollen types; the inaperturate type closely resembles pollen of Platygyna, suggesting that Acidoton may not be monophyletic and the tricolpate species perhaps represents a district genus. Pollen, together with floral morphological evidence, supports the hvpothesis of section Zuckertia as a plesiomorphic rriember of Tragia, and suggests that Tragia is paraphyletic and that the smaller Tragiinae genera are derived from Tragia. RP GILLESPIE, LJ (reprint author), SMITHSONIAN INST, DEPT BOT, WASHINGTON, DC 20560 USA. NR 37 TC 16 Z9 18 U1 2 U2 7 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1994 VL 81 IS 2 BP 317 EP 348 DI 10.2307/2992101 PG 32 WC Plant Sciences SC Plant Sciences GA NG230 UT WOS:A1994NG23000012 ER PT J AU DOYLE, JA DONOGHUE, MJ ZIMMER, EA AF DOYLE, JA DONOGHUE, MJ ZIMMER, EA TI INTEGRATION OF MORPHOLOGICAL AND RIBOSOMAL-RNA DATA ON THE ORIGIN OF ANGIOSPERMS SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article; Proceedings Paper CT 39th Annual Systematics Symposium of the Missouri-Botanical-Garden, Origin and Relationships of the Major Plant Groups CY OCT 02-03, 1992 CL MISSOURI BOTAN GARDEN, ST LOUIS, MO HO MISSOURI BOTAN GARDEN ID SEED PLANT PHYLOGENY; PLASTID GENE RBCL; NUCLEOTIDE-SEQUENCES; SANMIGUELIA-LEWISII; CLADISTIC-ANALYSIS; FLOWERING PLANTS; EVOLUTION; RECONSTRUCTION; MAGNOLIIDAE; SYSTEMATICS AB Previous phylogenetic analyses of morphological and rRNA data indicated that Gnetales are the closest living relatives of angiosperms but gave different basal angiosperm relationships. A two-step morphological analysis of seed plants (including fossils) and angiosperms rooted the latter near Magnoliales, with tricolpate eudicots and paleoherbs (herbaceous magnoliids and monocots) forming a clade, whereas analyses of rRNA sequences rooted angiosperms among paleoherbs, with eudicots and woody magnoliids forming a clade. Experiments with a revised seed plant morphological data set raise further questions: when angiosperms are scored like different angiosperm subgroups, they associate with different outgroups, although Gnetales are their closest living relatives. To test whether morphological and rRNA data are seriously contradictory or rather complementary, with inconsistencies being a function of better resolution in different parts of the tree, we experimented with morphological and rRNA data sets including the same six extant ''gymnosperm'' and 12 angiosperm taxa. Both analyses again associate angiosperms and Gnetales. The morphological analysis differs from previous ones in placing Nymphaeales and monocots at the base of the angiosperms, but trees rooted next to Magnoliales are only one step less parsimonious. As in previous studies, the rRNA analysis roots angiosperms next to Nymphaeales and breaks up the eudicots. Bootstrap and decay analyses of the rRNA data show strong support for the monophyly of angiosperms and Gnetales and their sister group relationship, but low support for groupings within angiosperms. However, one or another group of paleoherbs is basal in most bootstrap trees. A combined analysis favors a paleoherb rooting, but other relationships agree with the morphological results; in particular, eudicots form a clade. The conclusion that Gnetales are the closest living relatives of angiosperms permits a wide range of morphological scenarios, depending on the arrangement of fossil outgroups. Discovery of fossils on the long branch leading to angiosperms, methods of factoring out artifacts in rooting, or molecular data on the control of floral morphogenesis in angiosperms and Gnetales may be required for further progress in unraveling the origin of angiosperms. C1 HARVARD UNIV,DEPT ORGAN & EVOLUT BIOL,CAMBRIDGE,MA 02138. SMITHSONIAN INST,MOLEC SYST LAB,WASHINGTON,DC 20560. RP DOYLE, JA (reprint author), UNIV CALIF DAVIS,EVOLUT & ECOL SECT,DAVIS,CA 95616, USA. RI Zimmer, Elizabeth/G-3890-2011 NR 101 TC 148 Z9 160 U1 2 U2 9 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1994 VL 81 IS 3 BP 419 EP 450 DI 10.2307/2399899 PG 32 WC Plant Sciences SC Plant Sciences GA PA508 UT WOS:A1994PA50800003 ER PT J AU VANDIVER, PB PETRAGLIA, MD POTTS, RB AF VANDIVER, PB PETRAGLIA, MD POTTS, RB TI TECHNICAL ANALYSIS OF 2 UPPER PALEOLITHIC MORTARS FROM LA-MADELEINE, DORDOGNE, FRANCE SO ANTHROPOLOGIE LA French DT Article AB Two mortars from La Madeleine were re-identified in the Old World Paleolithic collections of the National Museum of Natural History (NMNH), Smithsonian Institution. A previous article summarized the archaeological context of the mortars, documented the history of their acquisition by the NMNH, and described their morphology (Petraglia and Potts, 1992). Since the publication of the previous article, three analytical techniques, nondestructive x-ray fluorescence, scanning electron microscopy with simultaneous energy dispersive x-ray analysis, and x-ray diffraction, were used to characterize the discolorations and substances on the mortars. The technical analyses identified the presence of pigments and other adherent substances on the mortars, and identified that these were drawn or rubbed onto the stone surfaces. C1 SMITHSONIAN INST,MUSEUM NATL HIST NAT,DEPT ANTHROPOL,WASHINGTON,DC 20560. RP VANDIVER, PB (reprint author), SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU MASSON EDITEUR PI PARIS 06 PA 120 BLVD SAINT-GERMAIN, 75280 PARIS 06, FRANCE SN 0003-5521 J9 ANTHROPOLOGIE JI Anthropologie PY 1994 VL 98 IS 4 BP 674 EP 682 PG 9 WC Anthropology SC Anthropology GA RD751 UT WOS:A1994RD75100010 ER PT J AU SAX, B DELANEY, M WILLIAMS, A AF SAX, B DELANEY, M WILLIAMS, A TI THE NATURE IN LEGEND AND STORY CONFERENCE SO ANTHROZOOS LA English DT Editorial Material C1 SMITHSONIAN INST,WASHINGTON,DC 20560. PACE UNIV,PLEASANTVILLE,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU DELTA SOCIETY PI RENTON PA 289 PERIMETER ROAD EAST, RENTON, WA 98055-1329 SN 0892-7936 J9 ANTHROZOOS JI Anthrozoos PY 1994 VL 7 IS 1 BP 72 EP 73 PG 2 WC Anthropology; Environmental Studies; Sociology; Veterinary Sciences SC Anthropology; Environmental Sciences & Ecology; Sociology; Veterinary Sciences GA NJ785 UT WOS:A1994NJ78500012 ER PT J AU SO, JF AF SO, JF TI BELLS OF BRONZE-AGE CHINA SO ARCHAEOLOGY LA English DT Article RP SO, JF (reprint author), SMITHSONIAN INST,FREER GALLERY ART,ARTHUR M SACKLER GALLERY,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU ARCHAEOLOGICAL INST PI NEW YORK PA 135 WILLIAM ST, NEW YORK, NY 10038-3805 SN 0003-8113 J9 ARCHAEOLOGY JI Archaeology PD JAN-FEB PY 1994 VL 47 IS 1 BP 42 EP & PG 0 WC Archaeology SC Archaeology GA ML881 UT WOS:A1994ML88100020 ER PT B AU Bishop, RL AF Bishop, RL BE Scott, DA Meyers, P TI Pre-Columbian pottery: Research in the Maya region SO ARCHAEOMETRY OF PRE-COLUMBIAN SITES ARTIFACTS LA English DT Proceedings Paper CT Symposium on Archaeometry of Pre-Columbian Sites and Artifacts CY MAR 23-27, 1992 CL LOS ANGELES, CA SP UCLA Inst Archaeol, Getty Conservat Inst C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. NR 0 TC 8 Z9 9 U1 0 U2 0 PU GETTY CONSERVATION INST PI LOS ANGELES PA LOS ANGELES, CA BN 0-89236-249-9 PY 1994 BP 15 EP 65 PG 51 WC Archaeology SC Archaeology GA BE50B UT WOS:A1994BE50B00002 ER PT B AU Tuross, N Fogel, ML AF Tuross, N Fogel, ML BE Scott, DA Meyers, P TI Exceptional molecular preservation in the fossil record: The archaeological, conservation, and scientific challenge SO ARCHAEOMETRY OF PRE-COLUMBIAN SITES ARTIFACTS LA English DT Proceedings Paper CT Symposium on Archaeometry of Pre-Columbian Sites and Artifacts CY MAR 23-27, 1992 CL LOS ANGELES, CA SP UCLA Inst Archaeol, Getty Conservat Inst C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC. NR 0 TC 3 Z9 3 U1 0 U2 0 PU GETTY CONSERVATION INST PI LOS ANGELES PA LOS ANGELES, CA BN 0-89236-249-9 PY 1994 BP 367 EP 380 PG 14 WC Archaeology SC Archaeology GA BE50B UT WOS:A1994BE50B00017 ER PT S AU MARSDEN, BG AF MARSDEN, BG BE Milani, A DiMartino, M Cellino, A TI SEARCH PROGRAMS FOR COMETS SO ASTEROIDS, COMETS, METEORS 1993 SE IAU SYMPOSIA LA English DT Article AB Although there are currently no professional search programs specifically designed for comets, comet discoveries are a significant by-product of the current search programs for near-earth asteroids. With their emphasis on the opposition point and the ecliptic, asteroid patrols are clearly biased toward discovering short-period comets. A comparison of the comet discoveries made at elongations of less than 120 degrees from the sun during the ten-year intervals ending in 1892 and 1992 indicates that the current opposition searches are not able to displace visual searches in the vicinity of the sun. Modification of the near-opposition search region to that proposed for the Spaceguard Project would be helpful, but-as also proposed for Spaceguard-supplementation is still necessary for high-inclination objects. CCD experimentation in the regions traditionally searched visually by amateurs would be useful. Searches for particular types of object like Kreutz sungrazers and comets near Jupiter in space are briefly discussed. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 10 TC 0 Z9 0 U1 1 U2 1 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2880-9 J9 IAU SYMP PY 1994 IS 160 BP 1 EP 16 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB21M UT WOS:A1994BB21M00001 ER PT S AU MARSDEN, BG GREEN, DWE WILLIAMS, GV AF MARSDEN, BG GREEN, DWE WILLIAMS, GV BE Milani, A DiMartino, M Cellino, A TI MPC AND ICQ DATABASES SO ASTEROIDS, COMETS, METEORS 1993 SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 160th Symposium of the International-Astronomical-Union: Asteroids, Comets, Meteors 1993 CY JUN 14-18, 1993 CL BELGIRATE, ITALY SP INT ASTRON UNION AB Databases of astrometric and orbital data for minor planets and comets and of photometric data for comets are maintained in connection with the publication of the Minor Planet Circulars and the International Comet Quarterly. Aspects of these publications and the content and availability of these databases are discussed. RP MARSDEN, BG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2880-9 J9 IAU SYMP PY 1994 IS 160 BP 489 EP 494 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB21M UT WOS:A1994BB21M00037 ER PT S AU GULLAHORN, GE HOHLFELD, RG BONIFAZI, C AF GULLAHORN, GE HOHLFELD, RG BONIFAZI, C BE Misra, AK Modi, VJ Holdaway, R Bainum, PM TI OBSERVATIONS OF TETHERED SATELLITE SYSTEM (TSS-1) DYNAMICS SO ASTRODYNAMICS 1993, PTS 1-3 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY AUG 16-19, 1993 CL VICTORIA, CANADA SP AMER ASTRONAUT SOC, AMER INST AERONAUT & ASTRONAUT C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-380-3 J9 ADV ASTRONAUT SCI PY 1994 VL 85 BP 701 EP 710 PN 1-3 PG 10 WC Engineering, Aerospace SC Engineering GA BA73X UT WOS:A1994BA73X00043 ER PT B AU EICHHORN, G AF EICHHORN, G BE Crabtree, DR Hanisch, RJ Barnes, J TI The astrophysics data system: Distributed data and services for the astronomical community SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA. RI Eichhorn, Guenther/C-9480-2009 OI Eichhorn, Guenther/0000-0002-3032-1978 NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 18 EP 21 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00004 ER PT B AU MINK, D AF MINK, D BE Crabtree, DR Hanisch, RJ Barnes, J TI Picturing the Guide Star Catalog SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 191 EP 194 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00044 ER PT B AU BIRKINSHAW, M AF BIRKINSHAW, M BE Crabtree, DR Hanisch, RJ Barnes, J TI Radially symmetric Fourier transforms SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 7 Z9 7 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 249 EP 252 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00055 ER PT B AU CONROY, MA AF CONROY, MA BE Crabtree, DR Hanisch, RJ Barnes, J TI QPTOOLS: Tools for creating and manipulating IRAF/QPOE data SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 363 EP 366 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00082 ER PT B AU DEPONTE, J CONROY, MA AF DEPONTE, J CONROY, MA BE Crabtree, DR Hanisch, RJ Barnes, J TI Temporal data screening in PROS SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 367 EP 370 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00083 ER PT B AU RHODE, KL FABBIANO, G MACKIE, G AF RHODE, KL FABBIANO, G MACKIE, G BE Crabtree, DR Hanisch, RJ Barnes, J TI An IRAF-based pipeline for reduction and analysis of archived ROSAT data SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 371 EP 374 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00084 ER PT B AU RHODE, KL HARNDEN, FR AF RHODE, KL HARNDEN, FR BE Crabtree, DR Hanisch, RJ Barnes, J TI Einstein hardness ratios from a user-developed IRAF script SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 379 EP 382 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00086 ER PT B AU WILKES, B MCDOWELL, J AF WILKES, B MCDOWELL, J BE Crabtree, DR Hanisch, RJ Barnes, J TI Radio to X-ray observation of quasars SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 423 EP 432 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00096 ER PT B AU WORRALL, DM BIRKINSHAW, M AF WORRALL, DM BIRKINSHAW, M BE Crabtree, DR Hanisch, RJ Barnes, J TI Analysis techniques for a multiwavelength study of radio galaxies SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 433 EP 436 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00097 ER PT B AU MANDEL, E SWICK, R AF MANDEL, E SWICK, R BE Crabtree, DR Hanisch, RJ Barnes, J TI Public access programming: Opening the black box that hides internal data SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS, III SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 3rd Annual Conference on Astronomical Data Analysis Software and Systems (ADASS III) CY OCT 13-15, 1993 CL VICTORIA, CANADA SP Natl Opt Astron Observ, Natl Res Council Canada, Smithsonian Astrophys Observ, Univ Victoria, Space Telescope Sci Inst, APUNIX, Barrodale Computing Serv Ltd., Digidyne Inc, Digital Equipment, NCD Inc, Silicon Graph Canada Inc, SYBASE Canada Inc, ZED Date C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-80-5 J9 ASTR SOC P PY 1994 VL 61 BP 507 EP 510 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88B UT WOS:A1994BD88B00113 ER PT J AU FABRICANT, DG BAUTZ, MW MCCLINTOCK, JE AF FABRICANT, DG BAUTZ, MW MCCLINTOCK, JE TI GALAXY EVOLUTION IN DISTANT, X-RAY SELECTED CLUSTERS OF GALAXIES .2. CL 0303+1658 AND CL 0303+1717 SO ASTRONOMICAL JOURNAL LA English DT Article ID LUMINOSITY FUNCTION; NEARBY CLUSTERS; PHOTOMETRY; COUNTS; STARS; CALIBRATION; MAGNITUDE; BANDS AB We present a photometric and spectroscopic survey of two clusters of galaxies at z=0.42. These are members of a sample of five distant, high x-ray luminosity clusters of galaxies, which have been selected from the Einstein Medium Sensitivity Survey Catalog. Our objective is to compare the galaxy population in these x-ray selected clusters to the populations in optically selected clusters, which show strong evolution. We have obtained R and I photometry complete to R approximately 22.3 in a 5.7' X 6.5' field centered on each cluster. In addition, we have obtained the spectra of 69 galaxies in the direction of the two clusters; 5 3 of these are cluster members. The x-ray luminosities of Cl 0303 + 1658 and Cl 0302 + 1717 (0.2-4.5 keV) are approximately 5 X 10(44) and approximately 4 X 10(44) ergs-1, and their velocity dispersions are 921(-123)+192 and 821(-94)+137 km s-1, respectively. The evolution of the galaxy population observed in optically selected clusters at z approximately 0.4 (as compared with clusters at the present epoch) is also found in these x-ray selected clusters. This confirms the results that we presented in a previous paper for Cl 1358+6245 at z=0.33. In both optically and x-ray selected clusters at z approximately 0.4, 20-30% of the galaxies have spectra with strong Balmer absorption lines or emission lines, consistent with recent star formation activity. We identify one possible difference between the optically and x-ray selected clusters; galaxies with very strong Balmer absorption lines, EW (H(delta) + H(gamma)) > 8 angstrom, are so far absent in our x-ray selected sample, yet they constitute approximately 25% of the spectroscopically active population in Dressler and Gunn's optically selected sample. C1 MIT,CTR SPACE RES,CAMBRIDGE,MA 02139. RP FABRICANT, DG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 41 TC 20 Z9 20 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD JAN PY 1994 VL 107 IS 1 BP 8 EP 23 DI 10.1086/116831 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN952 UT WOS:A1994MN95200002 ER PT J AU MCQUITTY, RG JAFFE, TR FRIEL, ED ORE, CMD AF MCQUITTY, RG JAFFE, TR FRIEL, ED ORE, CMD TI AN EMPIRICAL-ANALYSIS OF ABSORPTION FEATURES IN SYNTHETIC SPECTRA SO ASTRONOMICAL JOURNAL LA English DT Article ID RELATIVE OSCILLATOR-STRENGTHS; FE-I TRANSITIONS; OLD STELLAR POPULATIONS; GLOBULAR-CLUSTERS; PRECISION-MEASUREMENT; 0.5-PERCENT; METALLICITY; ABUNDANCES; ACCURACY; GALAXIES AB We have computed synthetic spectra in a grid of temperature, surface gravity, [Fe/H], and [alpha/Fe] in order to investigate the sensitivity of the MgH and Mgb feature and of five Fe features in the region lambdalambda 4900-5500 to changes in model parameters. After convolving the spectra with a Gaussian in order to simulate the blend of features observed with medium resolution spectroscopy, we obtained an overall metallicity from each feature with the empirical calibrations of late-type stars by Friel & Janes [A&A, 267, 75 (1993)]. We find that, on the whole, output metallicities accurately reflect differences in model [Fe/H], demonstrating that the calibration lines of Friel and Janes have accurately modeled index strength as a function of (B-V) and [Fe/H]. The Mg feature and, to a lesser extent, the Fe features at 5335, 501 1, and 5270 angstrom are sensitive to surface gravity. The Mg feature is also quite sensitive to [alpha/Fe]. These results, combined with systematic effects recently noted among observations of old open cluster giants, support the likelihood of varying [Mg/Fe] in the open cluster system. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MCQUITTY, RG (reprint author), MARIA MITCHELL OBSERV,3 VESTAL ST,NANTUCKET,MA 02554, USA. NR 34 TC 10 Z9 10 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD JAN PY 1994 VL 107 IS 1 BP 359 EP 366 DI 10.1086/116858 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN952 UT WOS:A1994MN95200029 ER PT S AU GORENSTEIN, P AF GORENSTEIN, P BE Foing, BH TI X-RAY ASTRONOMY FROM THE MOON SO ASTRONOMY AND SPACE SCIENCE FROM THE MOON SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E4 of the COSPAR 29th Plenary Meeting on Astronomy and Space Science from the Moon CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COSPAR, INT ACAD ASTRON, INT ASTRON UNION, CTR NATL ETUDES SPATIALES, EUROPEAN SPACE AGCY, NASA AB As a platform for x-ray astronomy, the surface of the Moon is outstanding for its stability, the availability of unlimited space for large instruments, and the ability to observe any object continuously for as much as 14 days. There is likely to be three phases of lunar based investigations. The first would be the soft landing of simple, self-contained instruments sent from Earth in their operating configuration, that require no assistance to begin functioning. The range of possible instruments is limited by the availability of power for survival during lunar night. One candidate instrument is a very wide field camera system for detecting and positioning bursts, flares, and transients and monitoring the interesting temporal variations shown by virtually all point-like sources. Another candidate for early deployment is a transit telescope that would perform a partial sky survey with better angular resolution, better energy resolution, and at higher energy than the one recently completed by ROSAT. The second stage would consist of the assembly of more complex telescopes, and all-sky monitors with human or robot assistance from components sent from Earth. The third, or ultimate stage would be the robotic fabrication of large telescopes from lunar materials. RP GORENSTEIN, P (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 12 TC 1 Z9 1 U1 0 U2 5 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042483-X J9 ADV SPACE RES PY 1994 VL 14 IS 6 BP 61 EP 68 DI 10.1016/0273-1177(94)90007-8 PG 8 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BA12C UT WOS:A1994BA12C00006 ER PT S AU HARWIT, M AF HARWIT, M BE Foing, BH TI INFRARED ASTRONOMY FROM THE MOON SO ASTRONOMY AND SPACE SCIENCE FROM THE MOON SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E4 of the COSPAR 29th Plenary Meeting on Astronomy and Space Science from the Moon CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COSPAR, INT ACAD ASTRON, INT ASTRON UNION, CTR NATL ETUDES SPATIALES, EUROPEAN SPACE AGCY, NASA AB The purpose of this paper is to exhibit the advantages and limitations to infrared astronomical observations from the moon. The most obvious apparent advantage is the lack of a lunar atmosphere; radiation arriving from the universe is neither extinguished nor refracted as it approaches the lunar surface. However, the Earths atmospheres protection against cosmic rays is also lost, and infrared detectors are highly sensitive to irradiation by energetic particles. A second apparent advantage is the relative ease with which beams from an array of telescopes can be interferometrically combined; again the vacuum environment with constant refractive index of unity throughout, permits combination without phase delay across the entire spectral range. But thermal radiation from optical components and stray radiation from the lunar environment, just outside the light path, tend to lessen that advantage, expected in narrow-spectral-band spatial interferometry, in which only the radiation in individual spectral lines in mapped, and broad-band thermal emission can be effectively filtered out. On the Moon's night side, and in polar craters on the Moon, radiative cooling should permit the attainment of high sensitivity with large telescopes. Just as the proposed Edison spacecraft primary mirror is expected to reach temperatures around 40 K, so also large lunar primary mirrors might be expected to reach temperatures in that range, making the zodiacal glow the main source of noise at wavelenghts shortward of 25 mu M. The slow rotation of the Moon, and the lack of vibrations from natural sources such as winds, should provide advantages in guiding on specific astronomical sources. To learn as much as possible about the difficulties of remote observations in a hostile environment, Antarctic observatories should be used as test beds for the rigors of lunar observations. The strenuous requirements for successful astronomical observations from the South Pole are similar to those expected to be encountered in observations conducted from the Moon. RP HARWIT, M (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20560, USA. NR 7 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042483-X J9 ADV SPACE RES PY 1994 VL 14 IS 6 BP 69 EP 76 DI 10.1016/0273-1177(94)90008-6 PG 8 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BA12C UT WOS:A1994BA12C00007 ER PT J AU MCNAMARA, BR JAFFE, W AF MCNAMARA, BR JAFFE, W TI SENSITIVE LIMITS ON THE MOLECULAR GAS CONTENT OF CLUSTER COOLING FLOWS SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, ISM; INTERGALACTIC MEDIUM; RADIO LINES, GALAXIES; X-RAYS, GALAXIES; GALAXIES, COOLING FLOWS ID POWERFUL RADIO GALAXIES; H-I ABSORPTION; X-RAY; STAR FORMATION; SURFACE PHOTOMETRY; CYGNUS-A; NGC-1275; EMISSION; DISCOVERY; COLD AB We have searched for molecular gas toward six cluster cooling flows in the CO(2-1) line using the James Clerk Maxwell Telescope. The sample includes clusters with estimated total cooling rates Of m(CF) approximately 10-600M. yr-1, at redshifts between z approximately 0.01-0.06. None were detected either in emission or absorption. Our molecular mass limits in the inner approximately 25 kpc are typically M(H2) less than or similar to 4 10(9) M.. Our limit for the nearest cluster, A 1060, is an order of magnitude lower. In the aggregate, these are the most sensitive limits available for cluster cooling flows. Using model spectra we find that molecular cloud populations as massive as few 10(10) M. with velocity dispersions less than or similar to 500 km s-1 are usually excluded, unless the material is colder and/or and has a significantly lower metal abundance compared to average Galactic clouds. If the steady state cooling flow model is correct, the cooling material must be converted efficiently to a non-gaseous state on a timescale of approximately 10(7-8) yr, or the putative cold clouds must be accelerated to a velocity dispersion greater than or similar to 700 km s-1 on a similar timescale. Future observations with broader bandwidths should yield improved limits. Failure to detect CO at levels significantly lower than these may be difficult to reconcile with standard cooling flow models. C1 STERREWACHT LEIDEN, 2300 RA LEIDEN, NETHERLANDS. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP MCNAMARA, BR (reprint author), KAPTEYN ASTRON INST, POSTBUS 800, 9700 AV GRONINGEN, NETHERLANDS. NR 38 TC 42 Z9 42 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 1994 VL 281 IS 3 BP 673 EP 680 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MT446 UT WOS:A1994MT44600010 ER PT J AU CASTELLI, F KURUCZ, RL AF CASTELLI, F KURUCZ, RL TI MODEL ATMOSPHERES FOR VEGA SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE STARS, INDIVIDUAL, ALPHA-LYR; STARS, ATMOSPHERES OF ID EFFECTIVE TEMPERATURES; G-STAR; ABUNDANCE; SOLAR; FLUXES; IRON AB We compared blanketed LTE models for Vega computed both with the opacity distribution function (ODF) method and the opacity-sampling (OS) method. In the ODF case we used the ATLAS9 code with the new opacity data from Kurucz (1992). Model parameters for Vega depend on the amount of reddening and on the helium abundance. For E(B-V) ranging from 0.0 to 0.01, the effective temperature T(eff) is included between 9550K and 9650K. A lower limit for the gravity is log g = 3.95, obtained for T(eff) = 9550K and solar He abundance. The metallicity is [M/H]=-0.5. The parameters were fixed by comparing the observed ultraviolet, visual, and near infrared flux distribution with the computed one and by comparing observed and computed Balmer profiles. A microturbulent velocity xi=2 km s-1 was assumed on the basis of previous spectroscopic works. In the OS case, we computed a model with parameters T(eff) = 9550K, log g = 3.95, xi = 2 km s-1, but with the real abundances of Vega, as derived from spectroscopic analyses. We used the ATLAS12 code (Kurucz 1993b). The comparison of the fluxes and Balmer profiles from the ATLAS9 and ATLAS12 models computed with the same T(eff), log g, and xi, but with different abundances for some elements has shown that they are almost identical, small differences occuring only in the ultraviolet. Therefore ATLAS9 fluxes can be used to predict colors of Vega. The more realistic ATLAS12 models should be used as starting point for abundance analyses and for spectrum synthesis. C1 OSSERV ASTRON TRIESTE, I-34131 TRIESTE, ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP CASTELLI, F (reprint author), CNR, GNA, VIA G TIEPOLO 11, I-34131 TRIESTE, ITALY. NR 55 TC 145 Z9 145 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 1994 VL 281 IS 3 BP 817 EP 832 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MT446 UT WOS:A1994MT44600025 ER PT S AU KURTZ, MJ AF KURTZ, MJ BE MacGillivray, HT Thomson, EB Lasker, BM Reid, IN Malin, DF West, RM Lorenz, H TI THE FUTURE OF MEMORY - ARCHIVING ASTRONOMICAL INFORMATION SO ASTRONOMY FROM WIDE-FIELD IMAGING SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 161st Symposium of the International-Astronomical-Union: Astronomy from Wide-Field Imaging CY AUG 23-27, 1993 CL POTSDAM, GERMANY SP INT ASTRON UNION AB The function of astronomers is to capture and create information and send it into the future. The vehicle for this transmission of knowledge is the archive. The digital revolution is quickly rendering our paper and glass archives obsolete; great challenges exist in creating archive systems for digital data We can only meet these challenges by substantial shared effort. RP KURTZ, MJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2878-7 J9 IAU SYMP PY 1994 IS 161 BP 331 EP 337 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB16E UT WOS:A1994BB16E00070 ER PT S AU MARSDEN, BG AF MARSDEN, BG BE MacGillivray, HT Thomson, EB Lasker, BM Reid, IN Malin, DF West, RM Lorenz, H TI ASTEROID AND COMET SURVEYS SO ASTRONOMY FROM WIDE-FIELD IMAGING SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 161st Symposium of the International-Astronomical-Union: Astronomy from Wide-Field Imaging CY AUG 23-27, 1993 CL POTSDAM, GERMANY SP INT ASTRON UNION AB Past surveys are described in the logical sequence of (1) comets visually, (2) asteroids visually, (3) asteroids photographically and (4) comets photographically. Plots show the evolution of asteroid surveys in terms of visual discovery magnitude and ecliptic latitude, and similarities and differences between surveys for the different types of body are discussed. The paper ends with a brief discussion of more recent discovery methods and some thoughts on the future. RP MARSDEN, BG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2878-7 J9 IAU SYMP PY 1994 IS 161 BP 385 EP 400 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB16E UT WOS:A1994BB16E00082 ER PT S AU ESKRIDGE, PB AF ESKRIDGE, PB BE MacGillivray, HT Thomson, EB Lasker, BM Reid, IN Malin, DF West, RM Lorenz, H TI DWARF SPHEROIDAL GALAXIES SO ASTRONOMY FROM WIDE-FIELD IMAGING SE IAU SYMPOSIA LA English DT Article ID SURFACE BRIGHTNESS GALAXIES; DEEP CCD PHOTOMETRY; ELLIPTICAL GALAXY; URSA MINOR; FORNAX CLUSTER; LOCAL GROUP; MILKY-WAY; CARINA; VIRGO; SEXTANS RP ESKRIDGE, PB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 59 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2878-7 J9 IAU SYMP PY 1994 IS 161 BP 525 EP 533 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB16E UT WOS:A1994BB16E00112 ER PT S AU MCLEAN, BJ BOHRINGER, H BURG, R GIACCONI, R HUCHRA, JP VOGES, W AF MCLEAN, BJ BOHRINGER, H BURG, R GIACCONI, R HUCHRA, JP VOGES, W BE MacGillivray, HT Thomson, EB Lasker, BM Reid, IN Malin, DF West, RM Lorenz, H TI OPTICAL-IDENTIFICATION OF ROSAT ALL-SKY SURVEY GALAXY CLUSTER CANDIDATES SO ASTRONOMY FROM WIDE-FIELD IMAGING SE IAU SYMPOSIA LA English DT Article C1 MAX PLANCK INST EXTRATERR PHYS, W-8046 GARCHING, GERMANY. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. EUROPEAN SO OBSERV, W-8046 GARCHING, GERMANY. SMITHSONIAN ASTROPHYS OBSERV, CAMBRIDGE, MA 02138 USA. RP MCLEAN, BJ (reprint author), SPACE TELESCOPE SCI INST, 3700 SAN MARTIN DR, BALTIMORE, MD 21218 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2878-7 J9 IAU SYMP PY 1994 IS 161 BP 653 EP 657 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB16E UT WOS:A1994BB16E00139 ER PT B AU HO, PTP AF HO, PTP BE Ishiguro, M Welch, WJ TI Gas feeding toward the Galactic center SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 161 EP 165 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00037 ER PT B AU BARSONY, M SCOVILLE, NZ CHANDLER, CJ AF BARSONY, M SCOVILLE, NZ CHANDLER, CJ BE Ishiguro, M Welch, WJ TI Detection of magnetohydrodynamic shocks in the L1551 outflow SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 222 EP 223 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00051 ER PT B AU WISEMAN, JJ HO, PTP AF WISEMAN, JJ HO, PTP BE Ishiguro, M Welch, WJ TI Large scale structure and kinematics of the Orion ridge SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 234 EP 235 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00057 ER PT B AU BARNES, PJ CRUTCHER, RM AF BARNES, PJ CRUTCHER, RM BE Ishiguro, M Welch, WJ TI High S/N HCO+ maps of the Orion B dense core SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 247 EP 248 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00063 ER PT B AU HO, PTP PENG, YL TORRELLES, JM GOMEZ, JF RODRIGUEZ, LF CANTO, J AF HO, PTP PENG, YL TORRELLES, JM GOMEZ, JF RODRIGUEZ, LF CANTO, J BE Ishiguro, M Welch, WJ TI A flattened cloud core in NGC 2024 SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OI Torrelles, Jose Maria/0000-0002-6896-6085 NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 262 EP 263 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00071 ER PT B AU HO, PTP AF HO, PTP BE Ishiguro, M Welch, WJ TI The Smithsonian Submillimeter Array SO ASTRONOMY WITH MILLIMETER AND SUBMILLIMETER WAVE INTERFEROMETRY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Astronomy with Millimeter and Submillimeter Wave Interferometry CY OCT 05-09, 1992 CL HAKONE, JAPAN SP IAU Commiss 40, URSI Commiss J C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-78-3 J9 ASTR SOC P PY 1994 VL 59 BP 384 EP 391 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD87Z UT WOS:A1994BD87Z00110 ER PT J AU BIRKINSHAW, M HUGHES, JP AF BIRKINSHAW, M HUGHES, JP TI A MEASUREMENT OF THE HUBBLE CONSTANT FROM THE X-RAY-PROPERTIES AND THE SUNYAEV-ZELDOVICH EFFECT OF ABELL 2218 SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMOLOGY, OBSERVATIONS; DISTANCE SCALE; GALAXIES, CLUSTERS, INDIVIDUAL (ABELL 2218); X-RAYS, GALAXIES ID RICH CLUSTERS; 3 CLUSTERS; GALAXIES; SPECTRUM AB The distance of the cluster of galaxies Abell 2218, and hence the value of the Hubble constant, has been measured by comparing the X-ray properties and the Sunyaev-Zel'dovich effect of the cluster. The result for the Hubble constant is H0 = 65 +/- 25 km s-1 Mpc-1, where the error includes the random and systematic errors, combined in quadrature, and the largest contributions to the overall error come from systematic errors in the Sunyaev-Zel'dovich effect data and in the X-ray spectrum of the cluster. The X-ray and Sunyaev-Zel'dovich effect data are consistent with the same model for the intergalactic medium in Abell 2218 (an isothermal beta-model with beta almost-equal-to 0.65 and cluster core radius almost-equal-to 1.'0). A previous report of a smaller Hubble constant, found by applying the same method on the same cluster, is shown to be based on a model for the cluster gas that is inconsistent with the Einstein IPC data. The present result for the Hubble constant is consistent with the value found earlier for the cluster Abell 665: by combining the results of the method for both clusters we conclude that the value of the Hubble constant is H0 = 55 +/- 17 km s-1 Mpc-1. RP BIRKINSHAW, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 27 TC 112 Z9 112 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP 33 EP 43 DI 10.1086/173540 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN701 UT WOS:A1994MN70100004 ER PT J AU ZARITSKY, D KENNICUTT, RC HUCHRA, JP AF ZARITSKY, D KENNICUTT, RC HUCHRA, JP TI H-II REGIONS AND THE ABUNDANCE PROPERTIES OF SPIRAL GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ABUNDANCES; GALAXIES, SPIRAL; H-II REGIONS ID INFRARED SURFACE PHOTOMETRY; ELLIPTICAL GALAXIES; COMPOSITION GRADIENT; SOUTHERN GALAXIES; CHEMICAL-COMPOSITIONS; PHYSICAL CONDITIONS; THEORETICAL-MODELS; IRREGULAR GALAXIES; FORBIDDEN LINES; OXYGEN AB We investigate the relationships between the characteristic oxygen abundance, the radial abundance gradient, and the macroscopic properties of spiral galaxies by examining the properties of individual H II regions within those galaxies. Our observations of the line flux ratio ([O II] lambdalambda3726, 3729 + [O III] lambdalambda4959, 5007)/Hbeta for 159 H II regions in 14 spiral galaxies are combined with published data to provide a sample of 39 disk galaxies for which ([O II] + [O III])/Hbeta has been measured for at least five H II regions. We find that the characteristic gas-phase abundances and luminosities of spiral galaxies are strongly correlated. This relationship maps almost directly onto the luminosity-metallicity relationship of irregular galaxies and is also quite similar to that found for elliptical and dwarf spheroidal galaxies. Within our sample of spirals, a strong correlation between characteristic abundance and Hubble type also exists. The correlation between luminosity and Hubble type complicates the issue, but we discuss several interpretations of the correlations. The relationship between circular velocity and characteristic abundance is also discussed. We find that the slopes of the radial abundance gradients, when expressed in units of dex/isophotal radius, do not significantly correlate with either luminosity or Hubble type. However, the hypothesis that both early and very late type spirals have shallower gradients than intermediate spirals is consistent with the data. We find suggestive evidence that the presence of a bar induces a flatter gradient and also briefly discuss whether abundance gradients are exponential, as is usually assumed. We investigate the properties of individual H II regions in a subset of 42 regions for which we have spectra that cover almost the entire spectral range from 3500 to 9800 angstrom. We use those data to estimate the densities and ionizing spectra within the H II regions. We confirm that the ionizing spectrum hardens with increasing radius and decreasing abundance. We find no correlation between the ionization parameter and either radius or abundance, but this may be due to significant scatter introduced by the simple conversion of line ratios to ionization parameter. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP ZARITSKY, D (reprint author), CARNEGIE OBSERV,813 SANTA BARBARA ST,PASADENA,CA 91101, USA. NR 84 TC 940 Z9 946 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP 87 EP 109 DI 10.1086/173544 PN 1 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN701 UT WOS:A1994MN70100008 ER PT J AU INDA, M MAKISHIMA, K KOHMURA, Y TASHIRO, M OHASHI, T BARR, P HAYASHIDA, K PALUMBO, GGC TRINCHIERI, G ELVIS, M FABBIANO, G AF INDA, M MAKISHIMA, K KOHMURA, Y TASHIRO, M OHASHI, T BARR, P HAYASHIDA, K PALUMBO, GGC TRINCHIERI, G ELVIS, M FABBIANO, G TI X-RAY CONTINUUM AND IRON-K EMISSION-LINE FROM THE RADIO GALAXY 3C 390.3 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (3C 390.3); GALAXIES, ACTIVE; X-RAYS, GALAXIES ID ACTIVE GALACTIC NUCLEI; VARIABILITY; GINGA; SENSITIVITY; LUMINOSITY; SPECTRUM; QUASARS; CATALOG AB X-ray properties of the radio galaxy 3C 390.3 were investigated using the EXOSAT and Ginga satellites. Long-term, large-amplitude X-ray intensity changes were detected over a period extending from 1984 through 1991, and high-quality X-ray spectra were obtained especially with Ginga. The X-ray continuum spectra were described with power-law model with photon slope in the range 1.5-1.8, and the slope flattened as the 2-20 keV luminosity decreased by 40%. There was a first detection of the iron emission line from this source at the 90% confidence level. An upper limit was derived on the thermal X-ray component. X-ray emission mechanisms and possible origins of the long-term variation are discussed. C1 TOKYO METROPOLITAN UNIV,DEPT PHYS,HACHIOJI,TOKYO 19203,JAPAN. EXOSAT OBSERV,ESTEC,DEPT SPACE SCI,DIV ASTROPHYS,2200 AG NOORDWIJK,NETHERLANDS. OSAKA UNIV,DEPT EARTH & SPACE SCI,TOYONAKA,OSAKA 560,JAPAN. UNIV BOLOGNA,DIPARTIMENTO ASTRON,I-40126 BOLOGNA,ITALY. OSSERVATORIO ASTROFISICO ARCETRI,I-50125 FLORENCE,ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP INDA, M (reprint author), UNIV TOKYO,DEPT PHYS,7-3-1 HONGO,BUNKYO KU,TOKYO 113,JAPAN. RI Tashiro, Makoto/J-4562-2012; Kohmura, Yoshiki/A-9967-2016 OI Kohmura, Yoshiki/0000-0001-5182-063X NR 57 TC 23 Z9 23 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP 143 EP 151 DI 10.1086/173547 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN701 UT WOS:A1994MN70100011 ER PT J AU MAO, S NARAYAN, R PIRAN, T AF MAO, S NARAYAN, R PIRAN, T TI ON THE BIMODAL DISTRIBUTION OF GAMMA-RAY BURSTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA RAYS, BURSTS AB Kouveliotou et al. recently confirmed that gamma-ray bursts are bimodal in duration. In this paper we compute the statistical properties of the short (less-than-or-equal-to 2 s) and long (>2 s) bursts using a method of analysis that makes no assumption regarding the location of the bursts, whether in the Galaxy or at a cosmological distance. We find the 64 ms channel on BATSE to be more sensitive to short bursts and the 1024 ms channel to be more sensitive to long bursts. We show that all the currently available data are consistent with the simple hypothesis that both short and long bursts have the same spatial distribution and that within each population the sources are standard candles. The rate of short bursts per unit volume is about 40% of the rate of long bursts. Although the durations of short and long gamma-ray bursts span several orders of magnitude and the total energy of a typical short burst is smaller than that of a typical long burst by a factor of approximately 20, surprisingly the peak luminosities of the two kinds of bursts are equal to within a factor of approximately 2. C1 HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL. RP MAO, S (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 32 TC 39 Z9 42 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP 171 EP 176 DI 10.1086/173550 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN701 UT WOS:A1994MN70100014 ER PT J AU SMITH, RC RAYMOND, JC LAMING, JM AF SMITH, RC RAYMOND, JC LAMING, JM TI HIGH-RESOLUTION SPECTROSCOPY OF BALMER-DOMINATED SHOCKS IN THE LARGE MAGELLANIC CLOUD SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC RAYS; LINE, PROFILES; MAGELLANIC CLOUDS; SHOCK WAVES; SUPERNOVA REMNANTS ID SUPER-NOVA REMNANTS; CYGNUS LOOP; OPTICAL-EMISSION; ACCELERATION; WAVE; IDENTIFICATION; PRECURSORS; SN-1006; PLASMA AB We present high-resolution spectra of the four Balmer-dominated supernova remnants (SNRs) in the Large Magellanic Cloud (LMC). These data allow us to measure the width of the narrow component of Ha emission in the nonradiative filaments present in these SNRs. We find that the widths range from 30 to 50 km s-1 FWHM, similar to the only previously measured width of a nonradiative shock filament, that of approximately 30 km s-1 in the NE Cygnus Loop. The line widths do not appear to scale with shock velocity. These observations severely limit the possible broadening mechanisms. We discuss several possibilities, the most promising of which is a precursor associated with cosmic rays. Assuming a cosmic-ray precursor, we are able to place constraints on the cosmic-ray diffusion coefficient. Observations such as these may provide the best method currently available to probe cosmic-ray acceleration in SNR shock waves. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SFA INC,LANDOVER,MD 20785. USN,RES LAB,WASHINGTON,DC 20375. RP SMITH, RC (reprint author), NATL OPT ASTRON OBSERV,CERRO TOLOLO INTER AMER OBSERV,CASILLA 603,LA SERENA,CHILE. NR 35 TC 52 Z9 53 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP 286 EP 293 DI 10.1086/173558 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN701 UT WOS:A1994MN70100022 ER PT J AU AYRES, TR STAUFFER, JR SIMON, T STERN, RA ANTIOCHOS, SK BASRI, GS BOOKBINDER, JA BROWN, A DOSCHEK, GA LINSKY, JL RAMSEY, LW WALTER, FM AF AYRES, TR STAUFFER, JR SIMON, T STERN, RA ANTIOCHOS, SK BASRI, GS BOOKBINDER, JA BROWN, A DOSCHEK, GA LINSKY, JL RAMSEY, LW WALTER, FM TI A FAR-ULTRAVIOLET FLARE ON A PLEIADES-G DWARF SO ASTROPHYSICAL JOURNAL LA English DT Article DE STAR, CORONAE; STARS, FLARE; STARS, MASS LOSS; STARS, ROTATION; ULTRAVIOLET, STARS ID X-RAY FLARE; EMISSION; SOLAR; CLUSTER AB The HST/FOS recorded a remarkable transient brightening in the C IV lambda lambda 1548,50 emissions of the rapidly rotating Pleiades G dwarf H II 314. On the one hand the ''flare'' might be a rare event luckily observed; on the other hand it might be a bellwether of the coronal heating in very young solar-mass stars. If the latter, flaring provides a natural spin-down mechanism through associated sporadic magnetospheric mass loss. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822. LOCKHEED PALO ALTO RES LABS,PALO ALTO,CA 94304. USN,RES LAB,WASHINGTON,DC 20375. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV COLORADO,NATL INST STAND & TECHNOL,JOINT INST LAB ASTROPHYS,BOULDER,CO 80309. NATL INST STAND & TECHNOL,DIV QUANTUM PHYS,BOULDER,CO 80309. SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794. PENN STATE UNIV,DEPT ASTRON,UNIV PK,PA 16802. RP AYRES, TR (reprint author), UNIV COLORADO,CTR ASTROPHYS & SPACE ASTRON,CAMPUS BOX 389,BOULDER,CO 80309, USA. RI Antiochos, Spiro/D-4668-2012 OI Antiochos, Spiro/0000-0003-0176-4312 NR 21 TC 6 Z9 6 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP L33 EP L36 DI 10.1086/187156 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN702 UT WOS:A1994MN70200009 ER PT J AU GORENSTEIN, P HUGHES, JP TUCKER, WH AF GORENSTEIN, P HUGHES, JP TUCKER, WH TI DETECTION OF X-RAYS FROM SN 1987A WITH ROSAT SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUPERNOVAE, INDIVIDUAL, (SN 1987A); X-RAYS, STARS; SUPERNOVA REMNANTS ID LARGE MAGELLANIC CLOUD; SUPERNOVA REMNANT; LIGHT ECHOES; SN-1987A; STARS; PROGENITOR; DISCOVERY; EMISSION; CATALOG; RING AB Soft X-rays (0.5-2 keV) were detected with the ROSAT PSPC from the direction of SN 1987A, which falls within an association in the LMC that is rich in B stars. The emission is consistent with two point sources in the LMC with total luminosity of similar to 10(34) ergs s(-1) The brighter source is identified with SN 1987A on the basis of its positional agreement. We interpret the emission as arising from the interaction of supernova ejecta with the pre-existing blue giant wind. The second source may be an unidentified Be/X-ray binary. Another possibility is that the second source is an X-ray echo from the supernova outburst. The X-ray echo interpretation requires that the supernova emitted similar to 10(47) ergs in a burst of soft X-rays. RP GORENSTEIN, P (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 41 TC 33 Z9 33 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP L25 EP L28 DI 10.1086/187154 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN702 UT WOS:A1994MN70200007 ER PT J AU WORRALL, DM LAWRENCE, CR PEARSON, TJ READHEAD, ACS AF WORRALL, DM LAWRENCE, CR PEARSON, TJ READHEAD, ACS TI EXTENDED AND COMPACT X-RAY-EMISSION IN POWERFUL RADIO GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ACTIVE; GALAXIES, INDIVIDUAL (3C 220.3, 3C 280); RADIO CONTINUUM, GALAXIES; X-RAYS, GALAXIES ID COMPLETE SAMPLE; QUASARS AB We report ROSAT X-ray observations of two powerful radio galaxies. 3C 280 provides evidence for a mixture of unresolved and extended emission, with the latter produced by hot plasma of insufficient pressure to confine the radio lobes and insufficient density for a cooling flow to have begun. 3C 220.3 gives only an X-ray upper limit, but one consistent with our interpretation of the X-ray emission from powerful radio-loud AGNs in terms of obscured and unobscured components. C1 CALTECH,OWENS VALLEY RADIO OBSERV,PASADENA,CA 91125. RP WORRALL, DM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Pearson, Timothy/N-2376-2015 OI Pearson, Timothy/0000-0001-5213-6231 NR 36 TC 39 Z9 39 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1994 VL 420 IS 1 BP L17 EP L20 DI 10.1086/187152 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MN702 UT WOS:A1994MN70200005 ER PT J AU HARRIS, DE AF HARRIS, DE TI CYGNUS-A - BOLTON,JOHN FIRST COSMIC SOURCE SO AUSTRALIAN JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT John G Bolton Memorial Symposium CY DEC 09-10, 1993 CL PARKES OBSERVATORY, PARKES, AUSTRALIA HO PARKES OBSERVATORY ID GAS AB Using a sea interferometer, Bolton and Stanley isolated Cygnus A as a discrete source in 1948. It is a prime example of a powerful radio galaxy and, in the last decade, has also been studied extensively in X-rays. In this paper I summarise the results from a ROSAT X-ray image. RP HARRIS, DE (reprint author), SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU C S I R O PUBLICATIONS PI COLLINGWOOD PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD VICTORIA 3066, AUSTRALIA SN 0004-9506 J9 AUST J PHYS JI Aust. J. Phys. PY 1994 VL 47 IS 5 BP 615 EP 618 PG 4 WC Physics, Multidisciplinary SC Physics GA PT317 UT WOS:A1994PT31700020 ER PT S AU LORENZINI, EC FULIGNI, F ZIELINSKI, JB COSMO, ML GROSSI, MD IAFOLLA, V ROTHMAN, T AF LORENZINI, EC FULIGNI, F ZIELINSKI, JB COSMO, ML GROSSI, MD IAFOLLA, V ROTHMAN, T BE Riedler, W Torkar, KM TI BALLOON-RELEASED GRAVITATION EXPERIMENTS IN FREE-FALL SO BALLOON TECHNOLOGY AND OBSERVATIONS SE ADVANCES IN SPACE RESEARCH-SERIES LA English DT Review AB A 3-m-long, non-propelled cryostat released from a 40-km-high balloon is used to shield a detector free falling inside for 30 s. This facility provides opportunities for accurate experiments in gravitational physics. Among others, two experiments of particular interest are: (a) a free-fall test of the Equivalence Principle; and (b) the local mapping of the gravity field along vertical lines by means of a gravity gradiometer, In experiment (a), the differential accelerations between two test masses of different materials (e.g. aluminum and gold) is measured during free fall. The estimated accuracy in testing the Equivalence Principle in a 30-s free fall is 4 parts in 10(14) with 95% confidence level. In experiment (b), the knowledge of surface gravity anomalies can be improved with a 10(-2)-EU gradiometer and the upward continuation gravity models validated. C1 CNR, FRASCATI, ITALY. SPACE RES CTR, WARSAW, POLAND. HARVARD UNIV, CAMBRIDGE, MA USA. RP LORENZINI, EC (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 22 TC 3 Z9 3 U1 1 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0273-1177 BN 0-08-042473-2 J9 ADV SPACE RES-SERIES PY 1994 VL 14 IS 2 BP 113 EP 118 DI 10.1016/0273-1177(94)90076-0 PG 6 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BZ78B UT WOS:A1993BZ78B00017 ER PT J AU SCRIBNER, KT STUWE, M AF SCRIBNER, KT STUWE, M TI GENETIC-RELATIONSHIPS AMONG ALPINE IBEX CAPRA-IBEX POPULATIONS REESTABLISHED FROM A COMMON ANCESTRAL SOURCE SO BIOLOGICAL CONSERVATION LA English DT Article DE ALPS; IBEX; EFFECTIVE POPULATION SIZE; GENETIC VARIABILITY; RESTORATION; SPATIAL VARIATION ID LARGE MAMMALS; VARIABILITY; DIFFERENTIATION AB Eight populations of Alpine ibex Capra ibex ibex , which were restored from a common ancestral source, were characterized genetically to determine the influence of restoration events (i.e. method of recovery-natural dispersal vs translocation, founding number, population growth, and per-generation effective population size) on population levels of heterozygosity and on the degree of inter-population genetic divergence. Heterozygosities were generally low, and varied among populations (range H = 0.023-0.067). Allele frequencies varied greatly among populations at two variable loci (PEP-B, range of common allele 0.98-0.39; F(st) = 0.177 and LDH-1, range of common allele 1.00-0.00; F(st) = 0.424), indicating substantial genetic divergence over few generations following population separation. Estimates of expected inter-population variance, calculated based on the number of generations since populations were separated and estimates of effective population size, were similar to observed genetic variance (F(st)), calculated from variation in allozyme allele frequencies, suggesting that populations have diverged genetically at a rate consistent with expectations under random genetic drift. Characteristics of recovery events and of subsequent population growth appear to have affected the degree of population divergence in allele frequency but not differences in populations levels of heterozygosity. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29801. SMITHSONIAN INST,NATL ZOOL PK,CONSERVAT & RES CTR,FT ROYAL,VA 22630. NR 36 TC 17 Z9 17 U1 1 U2 8 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0006-3207 J9 BIOL CONSERV JI Biol. Conserv. PY 1994 VL 69 IS 2 BP 137 EP 143 DI 10.1016/0006-3207(94)90053-1 PG 7 WC Biodiversity Conservation; Ecology; Environmental Sciences SC Biodiversity & Conservation; Environmental Sciences & Ecology GA NT758 UT WOS:A1994NT75800003 ER PT J AU GRAHAM, LH BROWN, JL AF GRAHAM, LH BROWN, JL TI EXCRETORY FATE OF RADIOLABELED CORTISOL IN THE DOMESTIC CAT SO BIOLOGY OF REPRODUCTION LA English DT Meeting Abstract C1 NATL ZOOL PK & CONSERVAT & RES CTR,FRONT ROYAL,VA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PY 1994 VL 50 SU 1 BP 83 EP 83 PG 1 WC Reproductive Biology SC Reproductive Biology GA NR591 UT WOS:A1994NR59100119 ER PT J AU SWANSON, WF ROTH, TL BROWN, JL WILDT, DE AF SWANSON, WF ROTH, TL BROWN, JL WILDT, DE TI RELATIONSHIP AND IMPORTANCE OF HORMONAL LUTEAL TRAITS DURING EARLY EMBRYOGENESIS IN THE DOMESTIC CAT SO BIOLOGY OF REPRODUCTION LA English DT Meeting Abstract C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PY 1994 VL 50 SU 1 BP 117 EP 117 PG 1 WC Reproductive Biology SC Reproductive Biology GA NR591 UT WOS:A1994NR59100253 ER PT J AU MONFORT, SL HARVEYDEVORSHAK, F GUERTA, L WILLIAMSON, LR SIMMONS, H PADILLA, L SHACKLETON, CHL WILDT, DE AF MONFORT, SL HARVEYDEVORSHAK, F GUERTA, L WILLIAMSON, LR SIMMONS, H PADILLA, L SHACKLETON, CHL WILDT, DE TI URINARY ANDROSTANEDIOL GLUCURONIDE IS A MEASURE OF ANDROGENIC STATUS IN ELD DEER STAGS (CERVUS-ELDI THAMIN) SO BIOLOGY OF REPRODUCTION LA English DT Meeting Abstract C1 NATL ZOOL PK,FRONT ROYAL,VA. CONSERVAT& RES CTR,FRONT ROYAL,VA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PY 1994 VL 50 SU 1 BP 171 EP 171 PG 1 WC Reproductive Biology SC Reproductive Biology GA NR591 UT WOS:A1994NR59100470 ER PT J AU ROTH, TL WOLFE, BA LONG, JA HOWARD, JG WILDT, DE AF ROTH, TL WOLFE, BA LONG, JA HOWARD, JG WILDT, DE TI EQUINE CHORIONIC-GONADOTROPIN IS NOT THE MAJOR CAUSE OF POOR PREIMPLANTATION EMBRYO SURVIVAL AFTER ARTIFICIAL-INSEMINATION IN THE DOMESTIC CAT SO BIOLOGY OF REPRODUCTION LA English DT Meeting Abstract C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20560. NR 2 TC 1 Z9 1 U1 0 U2 3 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PY 1994 VL 50 SU 1 BP 179 EP 179 PG 1 WC Reproductive Biology SC Reproductive Biology GA NR591 UT WOS:A1994NR59100503 ER PT J AU BROWN, JL WASSER, SK WILDT, DE GRAHAM, LH AF BROWN, JL WASSER, SK WILDT, DE GRAHAM, LH TI STEROID-METABOLISM AND THE EFFECTIVENESS OF FECAL ASSAYS FOR ASSESSING REPRODUCTIVE STATUS IN FELIDS SO BIOLOGY OF REPRODUCTION LA English DT Meeting Abstract C1 NATL ZOOL PK & CONSERVAT & RES CTR,FRONT ROYAL,VA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PY 1994 VL 50 SU 1 BP 185 EP 185 PG 1 WC Reproductive Biology SC Reproductive Biology GA NR591 UT WOS:A1994NR59100528 ER PT J AU DORR, LJ AF DORR, LJ TI THE VASCULAR PLANT COLLECTIONS OF WILLIAMS,R.S. FROM BOLIVIA AND PERU (1901-1902) - ADDENDA ET CORRIGENDA SO BRITTONIA LA English DT Article DE WILLIAMS,ROBERT,STATHAM (1859-1945); BOLIVIA; PERU AB Notes that augment an earlier essay on R. S. Williams' botanical activities and the distribution of his collections from Bolivia and Peru are presented. Twelve species based on Williams' vascular plant collections are added to a catalog that was previously published. Synonymies of an additional 22 taxa are corrected or updated. Notes also are provided concerning the typification or orthography of two species. RP DORR, LJ (reprint author), SMITHSONIAN INST,DEPT BOT,NHB-166,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK BOTANICAL GARDEN PI BRONX PA PUBLICATIONS DEPT, BRONX, NY 10458 SN 0007-196X J9 BRITTONIA JI Brittonia PD JAN-MAR PY 1994 VL 46 IS 1 BP 62 EP 65 DI 10.2307/2807458 PG 4 WC Plant Sciences SC Plant Sciences GA NE090 UT WOS:A1994NE09000005 ER PT J AU DURDEN, LA MUSSER, GG AF DURDEN, LA MUSSER, GG TI THE SUCKING LICE (INSECTA, ANOPLURA) OF THE WORLD - A TAXONOMIC CHECKLIST WITH RECORDS OF MAMMALIAN HOSTS AND GEOGRAPHICAL DISTRIBUTIONS SO BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY LA English DT Article AB A taxonomic listing of 532 species (plus six nomina nuda) of sucking lice (Insecta, Anoplura) described through January 1993 is presented. Listings are arranged alphabetically according to family and genus. For each louse species, the following information is given: 1) author, date, and literature citation for the original description; 2) synonymies, if any; 3) type host mammal species and its taxonomic affiliation; 4) principal host mammal species and their taxonomic affiliations; 5) type locality; 6) known geographical distribution of the louse species; 7) notes pertaining to other key taxonomic, host, or geographical data for the louse species. Two taxonomic changes are made in the checklist as follows: 1) Linognathus setosus bhatii Dutta, 1988, is elevated to species rank as Linognathus bhatii Dutta, 1988; 2) Neohaematopinus baibacinae Blagoveshtchensky, 1965, is reassigned as Linognathoides baibacinae (Blagoveshtchensky, 1965). C1 SMITHSONIAN INST,DEPT ENTOMOL,WASHINGTON,DC 20560. AMER MUSEUM NAT HIST,DEPT MAMMAL,NEW YORK,NY 10024. RP DURDEN, LA (reprint author), GEORGIA SO UNIV,INST ARTHROPODOL & PARASITOL,STATESBORO,GA 30460, USA. NR 0 TC 63 Z9 76 U1 0 U2 3 PU AMER MUSEUM NAT HISTORY PI NEW YORK PA ATTN: LIBRARY SERIALS UNIT CENTRAL PK WEST AT 79TH ST, NEW YORK, NY 10024-5192 SN 0003-0090 J9 B AM MUS NAT HIST JI Bull. Amer. Mus. Nat. Hist. PY 1994 IS 218 BP 1 EP 90 PG 90 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA MT461 UT WOS:A1994MT46100001 ER PT J AU BOWEN, WD OFTEDAL, OT BONESS, DJ IVERSON, SJ AF BOWEN, WD OFTEDAL, OT BONESS, DJ IVERSON, SJ TI THE EFFECT OF MATERNAL AGE AND OTHER FACTORS ON BIRTH MASS IN THE HARBOR SEAL SO CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE LA English DT Article ID SOUTHERN ELEPHANT SEALS; NORTHERN FUR SEALS; PHOCA-VITULINA; REPRODUCTIVE EFFORT; ARCTOCEPHALUS-GALAPAGOENSIS; HALICHOERUS-GRYPUS; MIROUNGA-LEONINA; NEONATAL GROWTH; FETAL GROWTH; RED DEER AB We studied the effects of maternal age, maternal body mass at parturition, year of birth, birth date, pup sex, and developmental stage (as indicated by the presence of a foetal pelage called lanugo) on the birth mass of harbour seals (Phoca vitulina) on Sable Island, Nova Scotia, Canada. Between 1987 and 1992, mass was obtained on 330 newborns and 259 of their mothers. Birth mass was significantly correlated with maternal mass (r = 0.42 for male pups; r = 0.32 for female pups). Among pups that had shed their lanugo, males were significantly heavier at birth (11.4 +/- 0.09 kg, n = 107) than females (10.9 +/- 0.09, n = 99). Birth mass increased significantly with maternal age (n = 71, range 4-12 years) even after the effects of maternal mass and pup sex were statistically removed. Mean birth mass varied significantly among years, from 10.5 to 11.5 kg. Newborns averaged 12.8% of maternal mass at parturition (84.8 +/- 0.49 kg). Most (84%) pups had shed their lanugo before birth. Pups born with extensive lanugo were born earlier in the season and weighed about 20% less than pups born without lanugo. These data suggest that pups born with lanugo may be less developed than pups that had shed their foetal coat. Young mothers (4 and 5 years old) produced most of the underweight, lanugo-covered pups. C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. TECH UNIV NOVA SCOTIA,CANADIAN INST FISHERIES TECHNOL,HALIFAX B3J 2X4,NS,CANADA. RP BOWEN, WD (reprint author), FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,DIV MARINE FISH,DARTMOUTH B2Y 4A2,NS,CANADA. RI Bowen, William/D-2758-2012 NR 63 TC 43 Z9 44 U1 1 U2 15 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4301 J9 CAN J ZOOL JI Can. J. Zool.-Rev. Can. Zool. PD JAN PY 1994 VL 72 IS 1 BP 8 EP 14 DI 10.1139/z94-002 PG 7 WC Zoology SC Zoology GA NK851 UT WOS:A1994NK85100002 ER PT B AU CASELLI, P MYERS, PC AF CASELLI, P MYERS, PC BE Clemens, DP Barvainis, R TI N2H+ map of a quiescent massive core in Orion B SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 6 Z9 6 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 52 EP 56 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00008 ER PT B AU GOODMAN, AA BARRANCO, JA AF GOODMAN, AA BARRANCO, JA BE Clemens, DP Barvainis, R TI Velocity structure in dense cores SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 57 EP 66 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00009 ER PT B AU GIRART, JM HO, PTP ANGLADA, G ESTALELLA, R TORRELLES, JM RODRIGUEZ, LF AF GIRART, JM HO, PTP ANGLADA, G ESTALELLA, R TORRELLES, JM RODRIGUEZ, LF BE Clemens, DP Barvainis, R TI The molecular core associated with the L723 outflow SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Girart, Josep/O-1638-2014; OI Girart, Josep/0000-0002-3829-5591; Torrelles, Jose Maria/0000-0002-6896-6085 NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 72 EP 76 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00011 ER PT B AU MARDONES, D MYERS, P CASELLI, P FULLER, G AF MARDONES, D MYERS, P CASELLI, P FULLER, G BE Clemens, DP Barvainis, R TI Infall line asymmetries in cores with candidate protostars SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 8 Z9 8 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 192 EP 196 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00028 ER PT B AU CHEN, H MYERS, PC LADD, EF WOOD, DOS AF CHEN, H MYERS, PC LADD, EF WOOD, DOS BE Clemens, DP Barvainis, R TI Bolometric temperature and young stars in the Taurus and Ophiuchus complexes SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 256 EP 265 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00038 ER PT B AU ZHANG, Q HO, PTP AF ZHANG, Q HO, PTP BE Clemens, DP Barvainis, R TI Ammonia maser associated with massive star formation toward W51 SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 304 EP 306 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00045 ER PT B AU HARTMANN, L CALVET, N AF HARTMANN, L CALVET, N BE Clemens, DP Barvainis, R TI Disk winds SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 315 EP 324 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00047 ER PT B AU TAFALLA, M MYERS, PC WILNER, DJ AF TAFALLA, M MYERS, PC WILNER, DJ BE Clemens, DP Barvainis, R TI Evidence for disruption of a core by an outflow in L1228 SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 4 Z9 4 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 391 EP 395 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00058 ER PT B AU WISEMAN, JJ HO, PTP AF WISEMAN, JJ HO, PTP BE Clemens, DP Barvainis, R TI Molecular streamers in Orion: Haystack (CO)-O-18 and VLA NH3 observations SO CLOUDS, CORES, AND LOW MASS STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 4th Haystack Observatory Conference on Clouds, Cores, and Low Mass Stars CY MAY 18-20, 1994 CL HAYSTACK OBSERV, WESTFORD, MA HO HAYSTACK OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-84-8 J9 ASTR SOC P PY 1994 VL 65 BP 396 EP 400 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD73Y UT WOS:A1994BD73Y00059 ER PT B AU Lada, CJ AF Lada, CJ BE Montmerle, T Lada, CJ Mirabel, IF TranThanhVan, J TI Infrared luminosity functions of very young clusters SO COLD UNIVERSE SE MORIOND ASTROPHYSICS MEETINGS LA English DT Proceedings Paper CT Astrophysics Session of the XXVIIIth Rencontre de Moriond - The Cold Universe CY MAR 13-20, 1993 CL LES ARCS, FRANCE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-150-1 J9 MORIOND AST PY 1994 BP 211 EP 220 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE54F UT WOS:A1994BE54F00023 ER PT B AU Kenyon, SJ AF Kenyon, SJ BE Montmerle, T Lada, CJ Mirabel, IF TranThanhVan, J TI FU Orionis objects and molecular outflows SO COLD UNIVERSE SE MORIOND ASTROPHYSICS MEETINGS LA English DT Proceedings Paper CT Astrophysics Session of the XXVIIIth Rencontre de Moriond - The Cold Universe CY MAR 13-20, 1993 CL LES ARCS, FRANCE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-150-1 J9 MORIOND AST PY 1994 BP 271 EP 274 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE54F UT WOS:A1994BE54F00030 ER PT J AU WALLE, AH AF WALLE, AH BE Schmidt, JB Hollander, AC Nevett, T Sheth, JN TI PHASING IN STRATEGIC THOUGHT - THE CASE OF FOLK FESTIVALS SO CONTEMPORARY MARKETING HISTORY LA English DT Proceedings Paper CT 6th Conference on Historical Research in Marketing and Marketing Thought: Contemporary Marketing History CY MAY 22-25, 1993 CL ATLANTA, GA SP MICHIGAN STATE UNIV, DEPT MKT & LOGIST, EMORY UNIV, GRAD SCH BUSINESS, ACAD MKT SCI, J MACRO MKT C1 SMITHSONIAN INST,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MICHIGAN STATE UNIV, DEPT MARKETING & LOGISTICS PI EAST LANSING PA N370 NORTH BUSINESS COMPLEX, EAST LANSING, MI 48824-1122 PY 1994 BP 441 EP 451 PG 11 WC Business; Communication; History SC Business & Economics; Communication; History GA BA13Q UT WOS:A1994BA13Q00035 ER PT B AU STAUFFER, JR AF STAUFFER, JR BE Caillault, JP TI The angular momentum evolution of young main sequence stars SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 16 Z9 16 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 163 EP 173 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00042 ER PT B AU HABBAL, SR AF HABBAL, SR BE Caillault, JP TI Characteristic signatures of solar activity from the small scale magnetic field SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 309 EP 318 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00069 ER PT B AU DONAHUE, RA BALIUNAS, SL AF DONAHUE, RA BALIUNAS, SL BE Caillault, JP TI Evidence of surface differential rotation (SDR) in lower main-sequence stars SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 8 Z9 8 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 396 EP 398 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00090 ER PT B AU BAKER, AJ STEFANIK, RP MARSCHALL, LA LATHAM, DW NATIONS, HL AF BAKER, AJ STEFANIK, RP MARSCHALL, LA LATHAM, DW NATIONS, HL BE Caillault, JP TI Orbital characteristics of X-ray-selected spectroscopic binaries SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 6 Z9 6 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 551 EP 553 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00133 ER PT B AU BLOEMHOF, EE DANEN, RM AF BLOEMHOF, EE DANEN, RM BE Caillault, JP TI Sub-arc second 10 mu M imaging of circumstellar dust SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 649 EP 651 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00155 ER PT B AU KAROVSKA, M MCCARTHY, DW CHRISTOU, JC AF KAROVSKA, M MCCARTHY, DW CHRISTOU, JC BE Caillault, JP TI High angular resolution observations of the R Aqr symbiotic system SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 652 EP 654 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00156 ER PT B AU SASSELOV, D KAROVSKA, M AF SASSELOV, D KAROVSKA, M BE Caillault, JP TI Interferometry and Cepheid diameters and distances SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 664 EP 666 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00160 ER PT B AU DUPREE, AK WHITNEY, BA AF DUPREE, AK WHITNEY, BA BE Caillault, JP TI Up the red giant branch in M67 SO COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun CY OCT 11-14, 1993 CL GEORGIA CTR CONTINUING EDUC, ATHENS, GA SP Georgia Univ HO GEORGIA CTR CONTINUING EDUC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-83-X J9 ASTR SOC P PY 1994 VL 64 BP 693 EP 695 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD88D UT WOS:A1994BD88D00169 ER PT S AU FORMAN, W JONES, C AF FORMAN, W JONES, C BE Seitter, WC TI X-RAY IMAGING OBSERVATIONS OF CLUSTERS OF GALAXIES SO COSMOLOGICAL ASPECTS OF X-RAY CLUSTERS OF GALAXIES SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Cosmological Aspects of X-Ray Clusters of Galaxies CY JUN 06-18, 1993 CL VELEN, GERMANY SP NATO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 7 Z9 7 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3058-7 J9 NATO ADV SCI INST SE PY 1994 VL 441 BP 39 EP 59 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB84L UT WOS:A1994BB84L00005 ER PT S AU HUCHRA, J AF HUCHRA, J BE Seitter, WC TI SO MANY GALAXIES, SO LITTLE TIME SO COSMOLOGICAL ASPECTS OF X-RAY CLUSTERS OF GALAXIES SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Cosmological Aspects of X-Ray Clusters of Galaxies CY JUN 06-18, 1993 CL VELEN, GERMANY SP NATO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3058-7 J9 NATO ADV SCI INST SE PY 1994 VL 441 BP 323 EP 338 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB84L UT WOS:A1994BB84L00036 ER PT S AU KIRSHNER, RP AF KIRSHNER, RP BE Seitter, WC TI A MAP WITH A SCALE - THE LAS-CAMPANAS REDSHIFT SURVEY SO COSMOLOGICAL ASPECTS OF X-RAY CLUSTERS OF GALAXIES SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Cosmological Aspects of X-Ray Clusters of Galaxies CY JUN 06-18, 1993 CL VELEN, GERMANY SP NATO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3058-7 J9 NATO ADV SCI INST SE PY 1994 VL 441 BP 371 EP 388 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB84L UT WOS:A1994BB84L00041 ER PT B AU RAVENHILL, PL AF RAVENHILL, PL BE Serageldin, I Taboroff, J TI PUBLIC-EDUCATION, NATIONAL COLLECTIONS, AND MUSEUM SCHOLARSHIP IN AFRICA SO CULTURE AND DEVELOPMENT IN AFRICA SE ENVIRONMENTALLY SUSTAINABLE DEVELOPMENT PROCEEDINGS SERIES LA English DT Proceedings Paper CT International Conference on Culture and Development in Africa CY APR 02-03, 1992 CL WORLD BANK, WASHINGTON, DC SP WORLD BANK, GOVT NORWAY, GOVT SWEDEN, ROCKEFELLER FDN, UNESCO HO WORLD BANK C1 SMITHSONIAN INST,NATL MUSEUM AFRICAN ART,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WORLD BANK PI WASHINGTON PA 1818 H STREET NW, WASHINGTON, DC 20433 BN 0-8213-2780-1 J9 ENVIRON SUST DEV P PY 1994 IS 1 BP 269 EP 281 PG 13 WC Planning & Development SC Public Administration GA BB50E UT WOS:A1994BB50E00019 ER PT B AU PAWSON, DL AF PAWSON, DL BE David, B Guille, A Feral, JP Roux, M TI ANTARCTIC ECHINODERMS - HISTORY, DISTRIBUTION, ECOLOGY, 1968-1993 SO ECHINODERMS THROUGH TIME LA English DT Proceedings Paper CT 8th International Echinoderm Conference CY SEP 06-10, 1993 CL DIJON, FRANCE RP PAWSON, DL (reprint author), SMITHSONIAN INST,MAIL STOP 163,WASHINGTON,DC 20560, USA. NR 0 TC 7 Z9 7 U1 0 U2 0 PU A A BALKEMA PI ROTTERDAM PA PO BOX 1675, 3000 BR ROTTERDAM, NETHERLANDS BN 90-5410-514-3 PY 1994 BP 99 EP 110 PG 12 WC Geosciences, Multidisciplinary; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology SC Geology; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology GA BC47A UT WOS:A1994BC47A00017 ER PT B AU AHEARN, C AF AHEARN, C BE David, B Guille, A Feral, JP Roux, M TI FAMILY PSOLIDAE - NEW DISTRIBUTION RECORDS FROM THE ANTARCTIC SO ECHINODERMS THROUGH TIME LA English DT Proceedings Paper CT 8th International Echinoderm Conference CY SEP 06-10, 1993 CL DIJON, FRANCE RP AHEARN, C (reprint author), SMITHSONIAN INST,MAIL STOP 163,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU A A BALKEMA PI ROTTERDAM PA PO BOX 1675, 3000 BR ROTTERDAM, NETHERLANDS BN 90-5410-514-3 PY 1994 BP 503 EP 503 PG 1 WC Geosciences, Multidisciplinary; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology SC Geology; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology GA BC47A UT WOS:A1994BC47A00116 ER PT B AU LESSIOS, HA AF LESSIOS, HA BE David, B Guille, A Feral, JP Roux, M TI STATUS OF DIADEMA POPULATIONS 10 YEARS AFTER MASS MORTALITY SO ECHINODERMS THROUGH TIME LA English DT Proceedings Paper CT 8th International Echinoderm Conference CY SEP 06-10, 1993 CL DIJON, FRANCE RP LESSIOS, HA (reprint author), SMITHSONIAN TROP RES INST,BOX 2072,BALBOA,PANAMA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU A A BALKEMA PI ROTTERDAM PA PO BOX 1675, 3000 BR ROTTERDAM, NETHERLANDS BN 90-5410-514-3 PY 1994 BP 748 EP 748 PG 1 WC Geosciences, Multidisciplinary; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology SC Geology; Marine & Freshwater Biology; Oceanography; Paleontology; Zoology GA BC47A UT WOS:A1994BC47A00177 ER PT S AU PERIVOLAROPOULOS, L AF PERIVOLAROPOULOS, L BE Romao, JC Freire, F TI Existence and stability of spinning embedded vortices SO ELECTROWEAK PHYSICS AND THE EARLY UNIVERSE SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES B, PHYSICS LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Electroweak Physics and the Early Universe CY MAR 23-25, 1994 CL SINTRA, PORTUGAL SP NATO, FUNDACAO GULBENKIAN, JUNTA NACL INVESTIGACAO CIENT & TECNOL, GRUPO TEORICO ALTA ENERGIAS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0258-1221 BN 0-306-44909-9 J9 NATO ADV SCI INST SE PY 1994 VL 338 BP 201 EP 204 PG 4 WC Physics, Particles & Fields SC Physics GA BD11D UT WOS:A1994BD11D00021 ER PT J AU FRAZIER, JG FIERSTINE, HL BEAVERS, SC ACHAVAL, F SUGANUMA, H PITMAN, RL YAMAGUCHI, Y PRIGIONI, CM AF FRAZIER, JG FIERSTINE, HL BEAVERS, SC ACHAVAL, F SUGANUMA, H PITMAN, RL YAMAGUCHI, Y PRIGIONI, CM TI IMPALEMENT OF MARINE TURTLES (REPTILIA, CHELONIA, CHELONIIDAE AND DERMOCHELYIDAE) BY BILLFISHES (OSTEICHTHYES, PERCIFORMES, ISTIOPHORIDAE AND XIPHIIDAE) SO ENVIRONMENTAL BIOLOGY OF FISHES LA English DT Article DE FISH AGGREGATION DEVICES; FADS; ROSTRUM; SPEARING ID FISH AGGREGATION DEVICES AB Billfishes have long been known to impale a great variety of objects, but there are only two brief, obscure records of marine turtles being speared. Details are presented on these two, as well as on two other confirmed records; data from two additional unconfirmed records are also presented. In total, three species of marine turtles are known to have been impaled by three species of billfishes; a fourth species of fish and a fourth species turtle are listed in an unconfirmed case. Records come from the eastern and western Pacific as well as the eastern Atlantic, Of the four confirmed cases, the turtles survived in two, and apparently died as an effect of the spearing in the other two. In three confirmed cases only the impaled rostrum was encountered, and in one confirmed case the entire fish was found, with its rostrum piercing the turtle. There is no obvious advantage - or clear disadvantage - involved in impaling turtles. It is argued that these attacks are accidental, and the result of attempts made by the billfish to capture prey that are near the turtle. These spearings indicate that the chelonians serve as shelters for prey animals on the high seas, and thus, are further evidence of the pelagic existence of marine turtles. The impalings are evidence of a singular ecological role of the turtles - as live fish aggregation devices. C1 CALIF POLYTECH STATE UNIV SAN LUIS OBISPO,COLL SCI & MATH,SAN LUIS OBISPO,CA 93407. NATL MARINE FISHERIES SERV,SW FISHERIES SCI CTR,LA JOLLA,CA 92038. MUSEO NACL HIST NAT,MONTEVIDEO,URUGUAY. UNIV REPUBLICA,FAC CIENCIAS,INST BIOL,MONTEVIDEO 11200,URUGUAY. OGASAWARA MARINE CTR,TOKYO,TOKYO 10021,JAPAN. SMITHSONIAN INST,NATL ZOOL PK,CONSERVAT RES CTR,FRONT ROYAL,VA 22630. RP FRAZIER, JG (reprint author), IPN,CTR INVEST & ESTUDIOS AVANZADOS,UNIDAD MERIDA APARTADO 73 CORDEMEX,MERIDA 97310,YUCATAN,MEXICO. NR 58 TC 11 Z9 12 U1 0 U2 3 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0378-1909 J9 ENVIRON BIOL FISH JI Environ. Biol. Fishes PD JAN PY 1994 VL 39 IS 1 BP 85 EP 96 DI 10.1007/BF00004759 PG 12 WC Ecology; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA MV618 UT WOS:A1994MV61800009 ER PT J AU WOLDA, H MAREK, J SPITZER, K NOVAK, I AF WOLDA, H MAREK, J SPITZER, K NOVAK, I TI DIVERSITY AND VARIABILITY OF LEPIDOPTERA POPULATIONS IN URBAN BRNO, CZECH-REPUBLIC SO EUROPEAN JOURNAL OF ENTOMOLOGY LA English DT Article DE URBAN ENTOMOLOGY; LEPIDOPTERA; DIVERSITY; STABILITY; VARIABILITY; LIGHT-TRAP AB Lepidoptera populations were monitored during 29 years by a light-trap in urban Brno. Compared with other sites in the Czech Republic (Prague-Ruzyne, Ceske Budejovice, Cernis) urban Brno was extraordinarily rich in species, richer than the other Czech sites studied and richer than many British sites in an urban to natural gradient. Variability of the more common species at Brno was as high as that at the ruderal/deteriorated agricultural setting at Ceske Budejovice, and generally higher than that in the wet forest environment at Cernis and much higher than in the park-like/suburban/agricultural setting of Prague. Voltinism had no effect on variability from year to year. Most of the more common species in Brno clearly increased in abundance over the years, unlike those at the other sites. Much of the large diversity at Brno, however, was because of a large number of accidental species, vagrants from elsewhere. When considering only the more common species (greater-than-or-equal-to 5 individuals per year), however, Brno is among the most species-poor sites. The common species at Brno were mostly tramp species that could take advantage of whatever food and habitat the city had to offer. Because of strong correlations in abundance between species at one site with conspecifics at other sites over distances of 150-200 km, the abundances in these populations are apparently strongly affected by large-scale processes such as weather, overriding in part large differences between the habitats or by large-scale dispersal of individuals between sites. Significant correlations also existed between conspecifics in these sites in variability as well as in trends in time, with the curious exception of Cernis, the only reasonably natural habitat, suggesting that these parameters are strongly affected by local habitat characteristics. RP WOLDA, H (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO,AA 34002, USA. RI Spitzer, Karel/H-4096-2014 NR 0 TC 9 Z9 9 U1 2 U2 7 PU CZECH ACAD SCI, INST ENTOMOLOGY PI CESKE BUDEJOVICE PA BRANISOVSKA 31, CESKE BUDEJOVICE, CZECH REPUBLIC 370 05 SN 1210-5759 J9 EUR J ENTOMOL JI Eur. J. Entomol. PY 1994 VL 91 IS 2 BP 213 EP 226 PG 14 WC Entomology SC Entomology GA NM510 UT WOS:A1994NM51000006 ER PT B AU GORENSTEIN, P FINOGUENOV, A AF GORENSTEIN, P FINOGUENOV, A BE Siegmund, OHW Vallerga, JV TI ENHANCING A MODERATE RESOLUTION X-RAY TELESCOPE WITH A ROTATING MODULATION COLLIMATOR SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V CY JUL 27-28, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1604-5 J9 P SOC PHOTO-OPT INS PY 1994 VL 2280 BP 11 EP 18 DI 10.1117/12.186813 PG 8 WC Astronomy & Astrophysics; Instruments & Instrumentation SC Astronomy & Astrophysics; Instruments & Instrumentation GA BB57R UT WOS:A1994BB57R00002 ER PT B AU BARBERA, M AUSTIN, G COLLURA, A FLANAGAN, K JELINSKY, S MURRAY, S SERIO, S ZOMBECK, M AF BARBERA, M AUSTIN, G COLLURA, A FLANAGAN, K JELINSKY, S MURRAY, S SERIO, S ZOMBECK, M BE Siegmund, OHW Vallerga, JV TI DEVELOPMENT OF THE UV ION SHIELDS FOR THE AXAF HRC SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V CY JUL 27-28, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1604-5 J9 P SOC PHOTO-OPT INS PY 1994 VL 2280 BP 214 EP 225 DI 10.1117/12.186815 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation SC Astronomy & Astrophysics; Instruments & Instrumentation GA BB57R UT WOS:A1994BB57R00020 ER PT B AU BARBERA, M BRESLAU, D FLANAGAN, K GRAESSLE, D ZOMBECK, M AF BARBERA, M BRESLAU, D FLANAGAN, K GRAESSLE, D ZOMBECK, M BE Siegmund, OHW Vallerga, JV TI SYNCHROTRON X-RAY TRANSMISSION MEASUREMENTS IN THE CALIBRATION PROGRAM FOR THE UV ION SHIELDS OF THE AXAF HRC SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V CY JUL 27-28, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1604-5 J9 P SOC PHOTO-OPT INS PY 1994 VL 2280 BP 229 EP 242 DI 10.1117/12.186834 PG 14 WC Astronomy & Astrophysics; Instruments & Instrumentation SC Astronomy & Astrophysics; Instruments & Instrumentation GA BB57R UT WOS:A1994BB57R00021 ER PT B AU FLANAGAN, KA BARBERA, M MURRAY, S ZOMBECK, M AF FLANAGAN, KA BARBERA, M MURRAY, S ZOMBECK, M BE Siegmund, OHW Vallerga, JV TI CALIBRATION PROGRAM FOR THE AXAF HIGH-RESOLUTION CAMERA SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V CY JUL 27-28, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE MICROCHANNEL PLATE; CALIBRATION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1604-5 J9 P SOC PHOTO-OPT INS PY 1994 VL 2280 BP 243 EP 256 DI 10.1117/12.186816 PG 14 WC Astronomy & Astrophysics; Instruments & Instrumentation SC Astronomy & Astrophysics; Instruments & Instrumentation GA BB57R UT WOS:A1994BB57R00022 ER PT S AU ZHAO, P CALLANAN, P GARCIA, MR MCCLINTOCK, JE REMILLARD, RA SILBER, A AF ZHAO, P CALLANAN, P GARCIA, MR MCCLINTOCK, JE REMILLARD, RA SILBER, A BE Holt, SS Day, CS TI OPTICAL OBSERVATIONS OF THE X-RAY NOVA J0422+32 SO EVOLUTION OF X-RAY BINARIES SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 4th Annual October Astrophysics Conference on the Evolution of X-Ray Binaries CY OCT, 1993 CL COLLEGE PK, MD SP UNIV MARYLAND, GODDARD SPACE FLIGHT CTR C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-329-9 J9 AIP CONF PROC PY 1994 IS 308 BP 99 EP 102 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB12B UT WOS:A1994BB12B00015 ER PT B AU Wilkes, BJ AF Wilkes, BJ BE Bicknell, GV Dopita, MA Quinn, PJ TI Agn in X- and gamma-rays: A view of the heart SO FIRST STROMLO SYMPOSIUM: THE PHYSICS OF ACTIVE GALAXIES SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 1st Stromlo Symposium on the Physics of Active Galaxies CY JUN 27-JUL 02, 1993 CL AUSTR ACAD SCI, CANBERRA, AUSTRALIA SP Astron Soc Pacific HO AUSTR ACAD SCI C1 SMITHSONIAN INST,ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. RI Dopita, Michael/P-5413-2014 OI Dopita, Michael/0000-0003-0922-4986 NR 0 TC 3 Z9 4 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-73-2 J9 ASTR SOC P PY 1994 VL 54 BP 41 EP 50 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33T UT WOS:A1994BE33T00005 ER PT J AU THOMPSON, SD POWER, ML RUTLEDGE, CE KLEIMAN, DG AF THOMPSON, SD POWER, ML RUTLEDGE, CE KLEIMAN, DG TI ENERGY-METABOLISM AND THERMOREGULATION IN THE GOLDEN LION TAMARIN (LEONTOPITHECUS-ROSALIA) SO FOLIA PRIMATOLOGICA LA English DT Review DE CALLITRICHIDAE; LEONTOPITHECUS; ENERGY USE; METABOLISM; THERMOREGULATION; BODY TEMPERATURE ID THERMAL CONDUCTANCE; FOOD-HABITS; MAMMALS; ENERGETICS; TEMPERATURE; MARSUPIALS; MARMOSETS; SYSTEM AB Energy metabolism and body temperature were examined in Leontopithecus rosalia, the golden lion tamarin. Total standard metabolic rate (SMR), defined as the metabolic rate of resting, fasted animals within thermoneutrality and during the inactive (nighttime) phase, averaged 381.5 +/- 65.2 ml O-2 . h(-1) (mass-specific metabolic rate 0.520 +/- 0.089 ml O-2 . g(-1). h(-1)). This value ranges from 73 to 89% of the expected SMR for animals of this body size depending on the predictive equation used. Active-phase resting metabolic rate within thermoneutrality was significantly greater than SMR, averaging 509.0 +/- 44.6 ml O-2 . h(-1) (0.709 +/- 0.062 ml O-2 . g(-1). h(-1)). Thermal conductance during the inactive phase was 20.3 +/- 2.7 ml O-2 . h(-1).degrees C-1 (0.029 +/- 0.003 ml O-2 . g(-1). h(-1).degrees C-1) or 70% of that during the active phase (28.5 +/- 3.2 ml O-2 . h(-1) .degrees C-1, 0.042 +/- 0.004 ml O-2 . g(-1). h(-1).degrees C-1). These values are about 85% of the mammalian predicted value. Body temperature fluctuated substantially between day (39.6 degrees C) and night (37.4 degrees C). However, none of these differences between circadian phases are unusual for primates (or, indeed, mammals) of similar body size. Although the metabolic rate of Leontopithecus is lower than the predicted one, it is higher than those rates reported for small nocturnal primates with similar food habits. Leontopithecus' modest rates of energy turnover may reflect a combination of phylogenetic constraints, feeding ecology and/or an energy-saving tactic that comprises part of a strategy to maximize reproductive effort. Although callitrichids are often cited as having rapid growth and high reproductive effort, the moderately low SMR of Leontopithecus is consistent with its intrinsic rate of natural increase, which is 90-94% of that expected for a mammal of its body size. C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. NR 51 TC 21 Z9 21 U1 2 U2 14 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 0015-5713 J9 FOLIA PRIMATOL JI Folia Primatol. PY 1994 VL 63 IS 3 BP 131 EP 143 DI 10.1159/000156807 PG 13 WC Zoology SC Zoology GA QY513 UT WOS:A1994QY51300002 PM 7750860 ER PT B AU LADA, CJ AF LADA, CJ BE Wamsteker, W Longair, MS Kondo, Y TI ON THE ROAD TO UNDERSTANDING STAR-FORMATION SO FRONTIERS OF SPACE AND GROUND-BASED ASTRONOMY: THE ASTROPHYSICS OF THE 21ST CENTURY SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT 27th ESLAB Symposium on Frontiers of Space and Ground-Based Astronomy - the Astrophysics of the 21st Century CY MAY 10-14, 1993 CL NOORDWIJK, NETHERLANDS SP EUROPEAN SPACE AGENCY, NASA, INT ASTRON UNION, COMMISS SPACE RES, SPACE RES ORG NETHERLANDS DE STAR FORMATION MOLECULAR CLOUDS PROTOSTARS BIPOLAR OUTFLOWS CIRCUMSTELLAR DISKS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2527-3 J9 ASTROPHYS SPACE SC L PY 1994 VL 187 BP 235 EP 247 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56F UT WOS:A1994BB56F00025 ER PT B AU MARSDEN, BG AF MARSDEN, BG BE Morrison, LV Gilmore, GF TI ASTROMETRIC OBSERVATIONS OF MINOR PLANETS AND COMETS - PRESENT AND FUTURE NEEDS SO GALACTIC AND SOLAR SYSTEM OPTICAL ASTROMETRY LA English DT Proceedings Paper CT Workshop on Galactic and Solar System Optical Astrometry CY JUN 21-24, 1993 CL ROBINSON COLL, CAMBRIDGE, ENGLAND SP ROYAL GREENWICH OBSERVATORY, INST ASTRON HO ROBINSON COLL C1 HARVARD SMITHSONIAN CTR ASTROPHYS,SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-46240-1 PY 1994 BP 263 EP 275 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC10G UT WOS:A1994BC10G00045 ER PT S AU NARAYAN, R PIRAN, T AF NARAYAN, R PIRAN, T BE Fishman, GJ Brainerd, JJ Hurley, K TI DO GAMMA-RAY BURST SOURCES REPEAT SO GAMMA-RAY BURSTS - SECOND WORKSHOP SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd Huntsville Gamma-Ray Workshop CY OCT 20-22, 1993 CL HUNTSVILLE, AL C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-336-1 J9 AIP CONF PROC PY 1994 IS 307 BP 132 EP 136 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB12A UT WOS:A1994BB12A00026 ER PT S AU YI, I AF YI, I BE Fishman, GJ Brainerd, JJ Hurley, K TI RELATIVISTIC BULK MOTION AND STATISTICS OF BEAMED GAMMA-RAY BURSTS SO GAMMA-RAY BURSTS - SECOND WORKSHOP SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd Huntsville Gamma-Ray Workshop CY OCT 20-22, 1993 CL HUNTSVILLE, AL C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-336-1 J9 AIP CONF PROC PY 1994 IS 307 BP 557 EP 561 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB12A UT WOS:A1994BB12A00113 ER PT B AU CHANCE, K WIJNBERGEN, JJ SCHNEIDER, W BURROWS, JP AF CHANCE, K WIJNBERGEN, JJ SCHNEIDER, W BURROWS, JP BE Nahum, M Villegier, JC TI THE OHIO CONCEPT - A BASE-LINE DESIGN FOR SATELLITE-BASED MEASUREMENTS OF STRATOSPHERIC OH SO HIGH-TEMPERATURE SUPERCONDUCTING DETECTORS: BOLOMETRIC AND NONBOLOMETRIC SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on High-Temperature Superconducting Detectors: Bolometric and Nonbolometric CY JAN 25-26, 1994 CL LOS ANGELES, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1454-9 J9 P SOC PHOTO-OPT INS PY 1994 VL 2159 BP 21 EP 33 DI 10.1117/12.176147 PG 13 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BA61H UT WOS:A1994BA61H00003 ER PT J AU HULLWALSKI, DA WALSKI, FL AF HULLWALSKI, DA WALSKI, FL TI THERES TROUBLE A-BREWIN - THE BREWING AND BOTTLING INDUSTRIES AT HARPERS-FERRY, WEST-VIRGINIA SO HISTORICAL ARCHAEOLOGY LA English DT Article AB During the late 19th and early 20th centuries, a brewery and bottling plant operated in the town of Harpers Ferry, West Virginia. Archaeological excavations recovered beer and soft drink bottles once used by these industries. Considering that the brewery was operational in Harpers Ferry for over 10 years and bottled soft drinks and beer, it was surprising that relatively few bottles attributable to the brewery were recovered from the excavations. In order to understand this phenomenon, this study examines the historical context of the brewery, its associated bottling plant, and the people who worked in these industries. The Harpers Ferry brewery bottles recovered from the excavations are described and compared with bottles from regional breweries and bottling plants. Various possibilities for the lack of bottles are considered, including financial problems of the brewery, popularity of the product, and temperance. C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,OFF REPATRIAT,WASHINGTON,DC 20560. RP HULLWALSKI, DA (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT ANTHROPOL,WASHINGTON,DC 20560, USA. NR 25 TC 2 Z9 2 U1 0 U2 5 PU SOC HISTORICAL ARCHAEOLOGY PI TUCSON PA PO BOX 30446, TUCSON, AZ 85751-0446 SN 0440-9213 J9 HIST ARCHAEOL JI Hist. Archaeol. PY 1994 VL 28 IS 4 BP 106 EP 121 PG 16 WC Archaeology SC Archaeology GA PZ569 UT WOS:A1994PZ56900011 ER PT B AU TONG, CE BLUNDELL, R UZAWA, Y AF TONG, CE BLUNDELL, R UZAWA, Y GP IEEE TI NEAR-FIELD PROBING THE BEAM PROFILE OF SUPERCONDUCTING RECEIVERS IN THE 200 GHZ FREQUENCY-RANGE SO IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM 1994, VOLS I-III SE IEEE AP-S INTERNATIONAL SYMPOSIUM DIGEST LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium 1994 CY JUN 19-24, 1994 CL UNIV WASHINGTON, SEATTLE, WA SP IEEE, ANTENNAS & PROPAGAT SOC HO UNIV WASHINGTON C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OI Tong, Edward/0000-0002-7736-4203 NR 0 TC 3 Z9 3 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2009-3 J9 IEEE AP-S PY 1994 BP 552 EP 555 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BB62W UT WOS:A1994BB62W00137 ER PT S AU CERUZZI, PE AF CERUZZI, PE BE Brunnstein, K Raubold, E TI FROM BATCH TO INTERACTIVE - THE EVOLUTION OF COMPUTING SYSTEMS, 1957-1969 SO INFORMATION PROCESSING '94, VOL II: APPLICATIONS AND IMPACTS SE IFIP TRANSACTIONS A-COMPUTER SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT IFIP 13th World Computer Congress CY AUG 28-SEP 02, 1994 CL HAMBURG, GERMANY SP INT FEDERAT INFORMAT PROC DE HISTORY OF COMPUTING; COMPUTER SYSTEM IMPLEMENTATION AB The history of computing has often been characterized as a logical progression from batch processing based on punched card input and sequential files, to interactive use. A close look at two examples in the 1960s reveals that this transition, however much desired, was more complex and difficult than most assumed it would be. Some of the reasons for that are analyzed. RP CERUZZI, PE (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL B V PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-5473 BN 0-444-81987-8 J9 IFIP TRANS A PY 1994 VL 52 BP 279 EP 284 PG 6 WC Computer Science, Information Systems; Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BB29R UT WOS:A1994BB29R00039 ER PT J AU JENG, LH WEISS, KB AF JENG, LH WEISS, KB TI MODELING CATALOGING EXPERTISE - A FEASIBILITY STUDY SO INFORMATION PROCESSING & MANAGEMENT LA English DT Article ID TITLE PAGE; KNOWLEDGE BASE; SYSTEM; AACR2 AB The development of expert systems for cataloging has had limited success to date. Although there has been some promise in the area of advisory or training systems, no system has been able to achieve satisfactory performance in practice. Much of the blame has been placed on two issues: the ambiguity and lack of compatible computerized structure of Anglo-American Cataloging Rules and the lack of understanding of expertise possessed by experienced catalogers. A project attempting to address the latter issue was planned in cooperation with National Agricultural Library. This paper describes the findings from the feasibility study. The project concentrates on the nature of cataloging expertise by attempting to answer the following research questions: (a) what tasks of cataloging involve expertise? (b) what are the components of cataloging expertise? and (c) what distinguishes the work performed by beginning catalogers from that performed by expert catalogers? The results of the study suggest that tasks involving cataloging expertise can be found in the following groups: (a) searching bibliographic databases, (b) determining access points, (c) interpreting bibliographic data and rules, (d) identifying and prioritizing problems and special cases, and (e) administering performance. The following facets of skill are further identified: (a) technology, such as online retrieval and knowledge about online catalogs; (b) professional tools, such as cataloging codes and related reference tools; (c) communication, such as knowledge about vendors and about operations in other departments; and (d) subject specialty and languages. A model is suggested, using task categories and skill facets as two dimensions, for representing the components of cataloging expertise. The plan of conduct for the cataloging expertise project is also described. C1 SMITHSONIAN INST,ARCHIVES AMER ART,WASHINGTON,DC 20560. RP JENG, LH (reprint author), UNIV CALIF LOS ANGELES,GRAD SCH LIB & INFORMAT SCI,405 HILGARD AVE,LOS ANGELES,CA 90024, USA. NR 27 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0306-4573 J9 INFORM PROCESS MANAG JI Inf. Process. Manage. PD JAN-FEB PY 1994 VL 30 IS 1 BP 119 EP 129 DI 10.1016/0306-4573(94)90027-2 PG 11 WC Computer Science, Information Systems; Information Science & Library Science SC Computer Science; Information Science & Library Science GA MK208 UT WOS:A1994MK20800009 ER PT B AU CHEN, H TOKUNAGA, AT AF CHEN, H TOKUNAGA, AT BE McLean, IS TI STELLAR DENSITY ENHANCEMENTS IN L1641 SO INFRARED ASTRONOMY WITH ARRAYS: THE NEXT GENERATION SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on Infrared Astronomy with Arrays: The Next Generation CY JUL, 1993 CL UNIV CALIF LOS ANGELES, LOS ANGELES, CA HO UNIV CALIF LOS ANGELES DE INFRARED STARS; STARS PRE-MAIN-SEQUENCE; ISM INDIVIDUAL (L1641) C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2778-0 J9 ASTROPHYS SPACE SC L PY 1994 VL 190 BP 165 EP 166 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA82J UT WOS:A1994BA82J00054 ER PT B AU WILLNER, SP AF WILLNER, SP BE McLean, IS TI A 4 LENS CAMERA DESIGN SO INFRARED ASTRONOMY WITH ARRAYS: THE NEXT GENERATION SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on Infrared Astronomy with Arrays: The Next Generation CY JUL, 1993 CL UNIV CALIF LOS ANGELES, LOS ANGELES, CA HO UNIV CALIF LOS ANGELES DE LENSES; CAMERA; OPTICS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2778-0 J9 ASTROPHYS SPACE SC L PY 1994 VL 190 BP 307 EP 308 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA82J UT WOS:A1994BA82J00095 ER PT B AU BLOEMHOF, EE DANEN, RM GWINN, GR AF BLOEMHOF, EE DANEN, RM GWINN, GR BE McLean, IS TI SCANNED SUPERRESOLUTION IN THEORY AND PRACTICE SO INFRARED ASTRONOMY WITH ARRAYS: THE NEXT GENERATION SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on Infrared Astronomy with Arrays: The Next Generation CY JUL, 1993 CL UNIV CALIF LOS ANGELES, LOS ANGELES, CA HO UNIV CALIF LOS ANGELES C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2778-0 J9 ASTROPHYS SPACE SC L PY 1994 VL 190 BP 309 EP 310 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA82J UT WOS:A1994BA82J00096 ER PT B AU LADA, CJ LADA, EA CLEMENS, DP BALLY, J AF LADA, CJ LADA, EA CLEMENS, DP BALLY, J BE McLean, IS TI MAPPING DUST EXTINCTION WITH IR CAMERAS SO INFRARED ASTRONOMY WITH ARRAYS: THE NEXT GENERATION SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on Infrared Astronomy with Arrays: The Next Generation CY JUL, 1993 CL UNIV CALIF LOS ANGELES, LOS ANGELES, CA HO UNIV CALIF LOS ANGELES DE DUST; EXTINCTION; MOLECULAR ABUNDANCES C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2778-0 J9 ASTROPHYS SPACE SC L PY 1994 VL 190 BP 473 EP 480 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA82J UT WOS:A1994BA82J00139 ER PT B AU FAZIO, GG AF FAZIO, GG BE Fossum, ER TI ASTRONOMICAL USER REQUIREMENTS FOR IR ARRAY TECHNOLOGY SO INFRARED READOUT ELECTRONICS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Infrared Readout Electronics II CY APR 07-08, 1994 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1530-8 J9 P SOC PHOTO-OPT INS PY 1994 VL 2226 BP 99 EP 107 DI 10.1117/12.178473 PG 9 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BA83X UT WOS:A1994BA83X00011 ER PT S AU AVRETT, EH FONTENLA, JM LOESER, R AF AVRETT, EH FONTENLA, JM LOESER, R BE Rabin, DM Jefferies, JT Lindsey, C TI FORMATION OF THE SOLAR 10830-ANGSTROM LINE SO INFRARED SOLAR PHYSICS SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 154th Symposium of the International-Astronomical-Union - 1st International Meeting devoted to Infrared Physics CY MAR 02-06, 1992 CL TUCSON, AZ SP INT ASTRON UNION DE HE-I-10830-ANGSTROM; INFRARED STARS; LINE FORMATION; SUN ATMOSPHERE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2522-2 J9 IAU SYMP PY 1994 IS 154 BP 35 EP 47 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76S UT WOS:A1994BZ76S00005 ER PT S AU TOLLESTRUP, EV FAZIO, GG WOOLAWAY, J BLACKWELL, J BRECHER, K AF TOLLESTRUP, EV FAZIO, GG WOOLAWAY, J BLACKWELL, J BRECHER, K BE Rabin, DM Jefferies, JT Lindsey, C TI INFRARED IMAGES OF THE SUN DURING THE JULY 11, 1991 SOLAR ECLIPSE SO INFRARED SOLAR PHYSICS SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 154th Symposium of the International-Astronomical-Union - 1st International Meeting devoted to Infrared Physics CY MAR 02-06, 1992 CL TUCSON, AZ SP INT ASTRON UNION DE ECLIPSES; INFRARED STARS; INTERPLANETARY MEDIUM; SUN CORONA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2522-2 J9 IAU SYMP PY 1994 IS 154 BP 179 EP 183 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76S UT WOS:A1994BZ76S00023 ER PT S AU AVRETT, EH CHANG, ES LOESER, R AF AVRETT, EH CHANG, ES LOESER, R BE Rabin, DM Jefferies, JT Lindsey, C TI MODELING THE INFRARED MAGNESIUM AND HYDROGEN LINES FROM QUIET AND ACTIVE SOLAR REGIONS SO INFRARED SOLAR PHYSICS SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 154th Symposium of the International-Astronomical-Union - 1st International Meeting devoted to Infrared Physics CY MAR 02-06, 1992 CL TUCSON, AZ SP INT ASTRON UNION DE ATOMIC PROCESSES; INFRARED STARS; LINE FORMATION; SUN ATMOSPHERE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2522-2 J9 IAU SYMP PY 1994 IS 154 BP 323 EP 339 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76S UT WOS:A1994BZ76S00040 ER PT S AU KURUCZ, RL AF KURUCZ, RL BE Rabin, DM Jefferies, JT Lindsey, C TI SYNTHETIC INFRARED-SPECTRA SO INFRARED SOLAR PHYSICS SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 154th Symposium of the International-Astronomical-Union - 1st International Meeting devoted to Infrared Physics CY MAR 02-06, 1992 CL TUCSON, AZ SP INT ASTRON UNION DE ATOMIC DATA; INFRARED STARS; LINE FORMATION; MOLECULAR DATA; SUN ATMOSPHERE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 10 Z9 10 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2522-2 J9 IAU SYMP PY 1994 IS 154 BP 523 EP 531 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76S UT WOS:A1994BZ76S00062 ER PT B AU TOLLS, V MELNICK, GJ DALGARNO, A FAZIO, GG STAUFFER, JR THADDEUS, P ERICKSON, NR SNELL, RL GOLDSMITH, PF HARWIT, M HOLLENBACH, DJ KOCH, DG NEUFELD, DA SCHIEDER, R WINNEWISSER, GF AF TOLLS, V MELNICK, GJ DALGARNO, A FAZIO, GG STAUFFER, JR THADDEUS, P ERICKSON, NR SNELL, RL GOLDSMITH, PF HARWIT, M HOLLENBACH, DJ KOCH, DG NEUFELD, DA SCHIEDER, R WINNEWISSER, GF BE Scholl, MS TI THE SUBMILLIMETER-WAVE ASTRONOMY SATELLITE SO INFRARED SPACEBORNE REMOTE SENSING II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Infrared Spaceborne Remote Sensing II CY JUL 27-29, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE RADIO TELESCOPE; HETERODYNE RECEIVER; STAR FORMATION; INTERSTELLAR CHEMISTRY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1592-8 J9 P SOC PHOTO-OPT INS PY 1994 VL 2268 BP 178 EP 185 DI 10.1117/12.185853 PG 8 WC Engineering, Aerospace; Remote Sensing SC Engineering; Remote Sensing GA BB54V UT WOS:A1994BB54V00017 ER PT J AU WCISLO, WT DANFORTH, BN MUELLER, UG AF WCISLO, WT DANFORTH, BN MUELLER, UG TI IN-MEMORIAM - EICKWORT,GEORGE,CAMPBELL (1949-1994) SO INSECTES SOCIAUX LA English DT Item About an Individual C1 CORNELL UNIV,DEPT ENTOMOL,ITHACA,NY 14853. CORNELL UNIV,NEUROBIOL & BEHAV SECT,ITHACA,NY 14853. RP WCISLO, WT (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO,AA 34002, USA. NR 0 TC 2 Z9 2 U1 0 U2 3 PU BIRKHAUSER VERLAG AG PI BASEL PA PO BOX 133 KLOSTERBERG 23, CH-4010 BASEL, SWITZERLAND SN 0020-1812 J9 INSECT SOC JI Insect. Soc. PY 1994 VL 41 IS 4 BP 461 EP 463 DI 10.1007/BF01240649 PG 3 WC Entomology SC Entomology GA PT929 UT WOS:A1994PT92900011 ER PT B AU FABRICANT, D HERTZ, E SZENTGYORGYI, A AF FABRICANT, D HERTZ, E SZENTGYORGYI, A BE Crawford, DL Craine, ER TI THE HECTOSPEC - A 300 OPTICAL-FIBER SPECTROGRAPH FOR THE CONVERTED MMT SO INSTRUMENTATION IN ASTRONOMY VIII, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 8th SPIE Conference on Instrumentation in Astronomy CY MAR 13-14, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 17 Z9 17 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1493-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2198 BP 251 EP 263 DI 10.1117/12.176702 PN 1 & 2 PG 13 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA90A UT WOS:A1994BA90A00026 ER PT B AU ROLL, J ELVIS, M SZENTGYORGYI, A VANSPEYBROECK, L AF ROLL, J ELVIS, M SZENTGYORGYI, A VANSPEYBROECK, L BE Crawford, DL Craine, ER TI OPTICAL DESIGN OF ASTRONOMICAL TELESCOPES WITH LARGE-SCALE COMPUTATIONAL METHODS BY DISTRIBUTED-PROCESSING ON LOCAL-AREA NETWORKS SO INSTRUMENTATION IN ASTRONOMY VIII, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 8th SPIE Conference on Instrumentation in Astronomy CY MAR 13-14, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1493-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2198 BP 504 EP 515 PN 1 & 2 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA90A UT WOS:A1994BA90A00053 ER PT B AU SZENTGYORGYI, A ELVIS, M ROLL, J VANSPEYBROECK, L AF SZENTGYORGYI, A ELVIS, M ROLL, J VANSPEYBROECK, L BE Crawford, DL Craine, ER TI DESIGN AND PERFORMANCE OF 4-REFLECTION OPTICS FOR X-RAY ASTRONOMY SO INSTRUMENTATION IN ASTRONOMY VIII, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 8th SPIE Conference on Instrumentation in Astronomy CY MAR 13-14, 1994 CL KONA, HI SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER ASTRON SOC, ASTRON SOC PACIFIC, EUROPEAN ASTRON SOC, OPT SOC AMER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1493-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2198 BP 1048 EP 1059 DI 10.1117/12.176796 PN 1 & 2 PG 12 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BA90A UT WOS:A1994BA90A00109 ER PT B AU Kenyon, SJ AF Kenyon, SJ BE Shafter, AW TI Where does the boundary layer go in accreting main sequence stars? SO INTERACTING BINARY STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Symposium on Interacting Binary Stars/105th Meeting of the Astronomical-Society-of-the-Pacific CY JUL 13-15, 1993 CL SAN DIEGO STATE UNIV, SAN DIEGO, CA SP Astron Soc Pacific HO SAN DIEGO STATE UNIV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02318. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-75-9 J9 ASTR SOC P PY 1994 VL 56 BP 63 EP 73 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33V UT WOS:A1994BE33V00006 ER PT B AU Silber, A Vrtilek, S Raymond, JC AF Silber, A Vrtilek, S Raymond, JC BE Shafter, AW TI ROSAT observations of SU ursae majoris and RU pegasi in outburst SO INTERACTING BINARY STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Symposium on Interacting Binary Stars/105th Meeting of the Astronomical-Society-of-the-Pacific CY JUL 13-15, 1993 CL SAN DIEGO STATE UNIV, SAN DIEGO, CA SP Astron Soc Pacific HO SAN DIEGO STATE UNIV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-75-9 J9 ASTR SOC P PY 1994 VL 56 BP 306 EP 310 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33V UT WOS:A1994BE33V00033 ER PT B AU Vrtilek, S Silber, A Raymond, JC AF Vrtilek, S Silber, A Raymond, JC BE Shafter, AW TI A search for boundary layer emission from cataclysmic variables using the ROSAT PSPC SO INTERACTING BINARY STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Symposium on Interacting Binary Stars/105th Meeting of the Astronomical-Society-of-the-Pacific CY JUL 13-15, 1993 CL SAN DIEGO STATE UNIV, SAN DIEGO, CA SP Astron Soc Pacific HO SAN DIEGO STATE UNIV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-75-9 J9 ASTR SOC P PY 1994 VL 56 BP 324 EP 329 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33V UT WOS:A1994BE33V00037 ER PT B AU Dobrzycka, D Kenyon, SJ Mikolajewska, J AF Dobrzycka, D Kenyon, SJ Mikolajewska, J BE Shafter, AW TI Spectroscopic observations of V443 Herculis: A symbiotic binary with a low mass white dwarf SO INTERACTING BINARY STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Symposium on Interacting Binary Stars/105th Meeting of the Astronomical-Society-of-the-Pacific CY JUL 13-15, 1993 CL SAN DIEGO STATE UNIV, SAN DIEGO, CA SP Astron Soc Pacific HO SAN DIEGO STATE UNIV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-75-9 J9 ASTR SOC P PY 1994 VL 56 BP 368 EP 373 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33V UT WOS:A1994BE33V00048 ER PT B AU Proga, D Mikolajewska, J Kenyon, SJ AF Proga, D Mikolajewska, J Kenyon, SJ BE Shafter, AW TI He I emission lines in symbiotic stars SO INTERACTING BINARY STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Symposium on Interacting Binary Stars/105th Meeting of the Astronomical-Society-of-the-Pacific CY JUL 13-15, 1993 CL SAN DIEGO STATE UNIV, SAN DIEGO, CA SP Astron Soc Pacific HO SAN DIEGO STATE UNIV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-75-9 J9 ASTR SOC P PY 1994 VL 56 BP 388 EP 392 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33V UT WOS:A1994BE33V00052 ER PT J AU WILLIS, D AF WILLIS, D TI PHOTOBIOGRAPHERS + SELECTED GROUP OF AFRICAN-AMERICAN PHOTOGRAPHERS WHO MAKE STRONG VISUAL AND WRITTEN STATEMENTS WITH THEIR WORK SO INTERNATIONAL REVIEW OF AFRICAN AMERICAN ART LA English DT Article RP WILLIS, D (reprint author), SMITHSONIAN INST,NATL AFRICAN AMER MUSEUM PROJECT,WASHINGTON,DC 20560, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU MUSEUM AFR AMER ART PI LOS ANGELES PA 4005 CRENSHAW BLVD, LOS ANGELES, CA 90008-2534 SN 1045-0920 J9 INT REV AFR AM ART JI Int. Rev. Afr. Am. Art PY 1994 VL 11 IS 3 BP 39 EP 42 PG 4 WC Art SC Art GA PB033 UT WOS:A1994PB03300008 ER PT J AU JORISSEN, FJ BUZAS, MA CULVER, SJ KUEHL, SA AF JORISSEN, FJ BUZAS, MA CULVER, SJ KUEHL, SA TI VERTICAL-DISTRIBUTION OF LIVING BENTHIC FORAMINIFERA IN SUBMARINE CANYONS OFF NEW-JERSEY SO JOURNAL OF FORAMINIFERAL RESEARCH LA English DT Article ID MODERN SEDIMENTARY PROCESSES; DEEP-SEA; WILMINGTON CANYON; CONTINENTAL-SHELF; NORTH-CAROLINA; POPULATION; ATLANTIC AB The vertical distribution of rose Bengal stained benthic foraminifera is described for five short sediment cores from water depths between 1567 and 2386 m taken in submarine canyons off New Jersey, USA. In one of the five cores no stained foraminifera were found, in two other cores stained foraminifera were only found in the topmost cm of the sediment, whereas in the last two cores stained foraminifera were found down to 5 cm depth. The canyon samples have low to very low foraminiferal densities and the infaunal habitat is weakly developed in comparison with published data on deep marine benthic foraminifera. The faunal composition indicates that neither a low organic flux, nor low bottom water oxygen concentrations can be responsible for these differences. It is suggested that sediment instability is an important ecosystem disturbance factor in canyon environments. The periodic occurrence of small-scale mass wasting and bottom scour by currents (processes which have been observed first hand) may prevent the foraminiferal faunas from reaching an equilibrium state. The data suggest that ecosystem instability is greater in straight canyons and at the mouths of gullies than in the center of the meandering Wilmington Canyon. Periodic shifts of the oxic-anoxic interface, related to physical disturbance of the canyon environments, may lead to trapping of foraminifera in anoxic sediments, and to an enrichment of weakly stained foraminifera in deeper sediment layers. Taxa resistant to low oxygen conditions would be especially sensitive to such a mechanism and, hence, an overestimation of the densities of these taxa is possible. C1 NAT HIST MUSEUM,DEPT PALEONTOL,LONDON SW7 5BD,ENGLAND. SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560. UNIV S CAROLINA,DEPT GEOL SCI,COLUMBIA,SC 29208. RP JORISSEN, FJ (reprint author), UNIV BORDEAUX 1,DEPT GEOL & OCEANOGR,AVE FAC,F-33405 TALENCE,FRANCE. RI Jorissen, Frans/D-2392-2009 NR 28 TC 43 Z9 44 U1 0 U2 5 PU CUSHMAN FOUNDATION FORAMINIFERAL RES PI CAMBRIDGE PA MUSEUM COMPARATIVE ZOOLOGY, DEPT INVERTEBRATE PALEONTOLOGY 26 OXFORD ST, HARVARD UNIV, CAMBRIDGE, MA 02138 SN 0096-1191 J9 J FORAMIN RES JI J. Foraminifer. Res. PD JAN PY 1994 VL 24 IS 1 BP 28 EP 36 PG 9 WC Paleontology SC Paleontology GA MY535 UT WOS:A1994MY53500003 ER PT J AU STATHOPLOS, L TUROSS, N AF STATHOPLOS, L TUROSS, N TI PROTEINS AND DNA FROM MODERN PLANKTONIC-FORAMINIFERA SO JOURNAL OF FORAMINIFERAL RESEARCH LA English DT Article ID ORGANIC MATRIX; ACIDIC MACROMOLECULES; POLYACRYLAMIDE GELS; BONE SIALOPROTEIN; ORBULINA-UNIVERSA; SHELL; BIOMINERALIZATION; OSTEONECTIN; CALCIUM AB A chemical dissection protocol, originally developed to extract mineral-associated proteins from vertebrate bone, can be used to extract proteins and DNA from modern planktonic foraminifera. Chemical dissection successfully concentrates mineral-associated proteins away from ectoplasm (cytoplasm outside the shell) and endoplasm (cytoplasm inside the shell) proteins. It also yields intact proteins and high molecular weight DNA from the endoplasm. At least twenty intact protein products were recovered from the mineral-associated fraction of modern Globorotalia menardii (Parker, Jones and Brady). The mineral-associated proteins from spinose Globigerinoides ruber (d'Orbigny) were richer in aspartate plus asparagine (Asx) residues than cytoplasm proteins. Planktonic foraminifera resemble other calcifying invertebrates both in their large number of mineral-associated proteins, and in the relative enrichment of Asx in these proteins compared to other cellular proteins. Mineral-associated proteins apparently degrade easily and rapidly postmortem, and Asx-enrichment may be a degradation phenomenon. The chemically resistant endoplasm maintained the morphology of the calcified shell even after the mineral was dissolved away. Nevertheless, intact proteins and high molecular weight DNA were recovered from this resistant endoplasm fraction with further processing. Neither the ectoplasm nor the mineral-associated fraction yielded high molecular weight DNA. Actin was identified at its original apparent molecular weight by Western blot from the partially solubilized endoplasm of five species examined: Globigerinoides sacculifer (Brady), Globigerinella aequilateralis (Brady), Globorotalia truncatulinoides (d'Orbigny), Globorotalia ungulata Bermudez, and Pulleniatina obliquiloculata (Parker and Jones). C1 SMITHSONIAN INST,WASHINGTON,DC 20560. RP STATHOPLOS, L (reprint author), NOAA,NODC,E-OC23,UNIVERSAL BLDG S,1825 CONNECTICUT AVE NW,WASHINGTON,DC 20235, USA. NR 74 TC 6 Z9 6 U1 2 U2 6 PU CUSHMAN FOUNDATION FORAMINIFERAL RES PI CAMBRIDGE PA MUSEUM COMPARATIVE ZOOLOGY, DEPT INVERTEBRATE PALEONTOLOGY 26 OXFORD ST, HARVARD UNIV, CAMBRIDGE, MA 02138 SN 0096-1191 J9 J FORAMIN RES JI J. Foraminifer. Res. PD JAN PY 1994 VL 24 IS 1 BP 49 EP 59 PG 11 WC Paleontology SC Paleontology GA MY535 UT WOS:A1994MY53500005 ER PT J AU ALPERT, YL GREEN, JL AF ALPERT, YL GREEN, JL TI CONE STRUCTURE AND FOCUSING OF VLF AND LF ELECTROMAGNETIC-WAVES AT HIGH-ALTITUDES IN THE IONOSPHERE SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DIPOLE AB The frequency and angle dependencies of the electric field radiated by an electric dipole E = E(0) cos omega t are studied through numerical calculations of \E\ in the VLF and LF frequency bands 0.02f(b) less than or equal to F less than or equal to 0.5f(b) in a model ionosphere over an altitude region of 800-6000 km where the wave frequency and electron gyrofrequency varies between F similar to 4 - 500 kHz and f(b) similar or equal to (1.1 to 0.2) MHz respectively. It is found that the amplitudes of the electric field have large maxima in four regions: close to the direction of the Earth magnetic field line B-0 (it is called the axis field E(0)), in the Storey E(St), reversed Storey E(RevSt), and resonance E(Res) cones. The maximal values of E(0), E(Res), and E(Rev.St) are the most pronounced close to the lower hybrid frequency, F similar to F-L. The flux of the electric field is concentrated in very narrow regions, with the apex angles of the cones Delta beta similar or equal to (0.1 - 1) deg. The enhancement and focusing of the electric field increases with altitude starting at Z > 800 km. At Z greater than or equal to 1000 up to 6000 km, the relative value of \E\, in comparison with its value at Z = 800 km is about (10(2) to 10(4)) times larger. Thus the flux of VLF and LF electromagnetic waves generated at high altitudes in the Earth's ionosphere are trapped into very narrow conical beams similar to laser beams. C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP ALPERT, YL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 BARDEN ST,CAMBRIDGE,MA 02138, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JAN 1 PY 1994 VL 99 IS A1 BP 389 EP 399 DI 10.1029/93JA01473 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MR026 UT WOS:A1994MR02600039 ER PT J AU CHEUNG, ASC MOK, DKW SUN, Y FREEMAN, DE AF CHEUNG, ASC MOK, DKW SUN, Y FREEMAN, DE TI THE POTENTIAL-ENERGY CURVE FOR THE B(3)SIGMA(U)(-)-STATE OF OXYGEN AND ACCURATE FRANCK-CONDON FACTORS FOR THE SCHUMANN-RUNGE BANDS SO JOURNAL OF MOLECULAR SPECTROSCOPY LA English DT Article ID REGION 175-205 NM; ABSORPTION-BANDS; OSCILLATOR-STRENGTHS; CROSS-SECTION; SPECTROSCOPIC CONSTANTS; PREDISSOCIATION; O-2; MOLECULES; STATE; O2 C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP CHEUNG, ASC (reprint author), UNIV HONG KONG, DEPT CHEM, POKFULAM RD, HONG KONG, HONG KONG. RI Mok, Daniel Kam-Wah/K-5826-2013 OI Mok, Daniel Kam-Wah/0000-0002-6677-2949 NR 35 TC 10 Z9 10 U1 0 U2 5 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0022-2852 J9 J MOL SPECTROSC JI J. Mol. Spectrosc. PD JAN PY 1994 VL 163 IS 1 BP 9 EP 18 DI 10.1006/jmsp.1994.1002 PG 10 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA MN462 UT WOS:A1994MN46200002 ER PT J AU CHANCE, K DENATALE, P BELLINI, M INGUSCIO, M DILONARDO, G FUSINA, L AF CHANCE, K DENATALE, P BELLINI, M INGUSCIO, M DILONARDO, G FUSINA, L TI PRESSURE BROADENING OF THE 2.4978-THZ ROTATIONAL LINES OF HO2 BY N2 AND O-2 SO JOURNAL OF MOLECULAR SPECTROSCOPY LA English DT Article ID STRATOSPHERIC HO2; SPECTROSCOPY; OH; SPECTRUM; REGION C1 UNIV FLORENCE,EUROPEAN LAB NONLINEAR SPECT,I-50125 FLORENCE,ITALY. UNIV FLORENCE,DEPT PHYS,I-50125 FLORENCE,ITALY. UNIV BOLOGNA,DEPT PHYS & INORGAN CHEM,I-40136 BOLOGNA,ITALY. RP CHANCE, K (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. RI Bellini, Marco/J-4990-2013; OI Bellini, Marco/0000-0001-7352-1366; Chance, Kelly/0000-0002-7339-7577 NR 12 TC 13 Z9 13 U1 0 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-2852 J9 J MOL SPECTROSC JI J. Mol. Spectrosc. PD JAN PY 1994 VL 163 IS 1 BP 67 EP 70 DI 10.1006/jmsp.1994.1007 PG 4 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA MN462 UT WOS:A1994MN46200007 ER PT J AU RODRIGUEZ, RL EBERHARD, WG AF RODRIGUEZ, RL EBERHARD, WG TI MALE COURTSHIP BEFORE AND DURING COPULATION IN 2 SPECIES OF XYONYSIUS BUGS (HEMIPTERA, LYGAEIDAE) SO JOURNAL OF THE KANSAS ENTOMOLOGICAL SOCIETY LA English DT Article ID CRYPTIC FEMALE CHOICE AB Males of two species of Xyonysius court females both before and during copulation. Courtship during copulation (''copulatory courtship'') is more elaborate, and differs between the two species. Male genital sclerites are moved in ways suggesting that they stimulate females during copulation. It is argued that copulatory courtship may be under sexual selection by cryptic female choice. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP RODRIGUEZ, RL (reprint author), UNIV COSTA RICA,ESCUELA BIOL,CIUDAD UNIV,SAN JOSE,COSTA RICA. NR 9 TC 5 Z9 5 U1 1 U2 4 PU KANSAS ENTOMOLOGICAL SOC PI LAWRENCE PA PO BOX 368, LAWRENCE, KS 66044 SN 0022-8567 J9 J KANSAS ENTOMOL SOC JI J. Kans. Entomol. Soc. PD JAN PY 1994 VL 67 IS 1 BP 37 EP 45 PG 9 WC Entomology SC Entomology GA NY822 UT WOS:A1994NY82200005 ER PT B AU RAND, AS AF RAND, AS BE Vitt, LJ Pianka, ER TI BEHAVIORAL ECOLOGY SO LIZARD ECOLOGY: HISTORICAL AND EXPERIMENTAL PERSPECTIVES LA English DT Proceedings Paper CT Symposium on Lizard Ecology: the 3rd Generation, at the 1993 Annual Meeting of the American-Society-of-Ichthyologists-and-Herpetologists/Herpetologists-Lea gue CY 1993 CL UNIV TEXAS AUSTIN, AUSTIN, TX SP AMER SOC ICHTHYOLOGISTS & HERPETOLOGISTS, HERPETOLOGISTS LEAGUE HO UNIV TEXAS AUSTIN C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PRINCETON UNIV PRESS PI PRINCETON PA 41 WILLIAM ST, PRINCETON, NJ 08540 BN 0-691-03649-7 PY 1994 BP 91 EP 93 PG 3 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA BA82A UT WOS:A1994BA82A00006 ER PT J AU EMMONS, LH AF EMMONS, LH TI NEW LOCALITY RECORDS OF MESOMYS (RODENTIA, ECHIMYIDAE) SO MAMMALIA LA English DT Note RP EMMONS, LH (reprint author), SMITHSONIAN INST,DIV MAMMALS MRC108,WASHINGTON,DC 20560, USA. NR 1 TC 3 Z9 3 U1 1 U2 1 PU MUSEUM NAT HIST NATURELLE PI PARIS PA 55 RUE DE BUFFON, 75005 PARIS, FRANCE SN 0025-1461 J9 MAMMALIA JI Mammalia PY 1994 VL 58 IS 1 BP 148 EP 149 PG 2 WC Zoology SC Zoology GA NH143 UT WOS:A1994NH14300015 ER PT J AU SCHWEDE, G HENDRICHS, H WEMMER, C AF SCHWEDE, G HENDRICHS, H WEMMER, C TI SIBLING RELATIONS IN YOUNG WHITE-TAILED DEER FAWNS ODOCOILEUS-VIRGINIANUS SO MAMMALIA LA English DT Article ID SOUTH TEXAS; BEHAVIOR; MORTALITY AB Between 1986 and 1987 we monitored association frequencies and distances of five young white-tailed deer siblings Odocoileus virginianus at the National Zoo's Conservation and Research Center (CRC), Front Royal, Virginia, to determine their development in relation to their susceptibility to predation. Twin fawns were separated by their mother within the first few hours following parturition and were found isolated during the first three to four weeks. Subsequently, the isolation period was terminated by the mother, and twins were always guided to a communal bedding site. This was indicated by an increase in frequency of association and a decrease in distances between siblings. The results are discussed as consequences of selective adaptations to predation. C1 UNIV BIELEFELD,DEPT ETHOL,D-33501 BIELEFELD,GERMANY. SMITHSONIAN INST,NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA 22630. RP SCHWEDE, G (reprint author), WWF GERMANY,HEDDERICHSTR 110,D-60591 FRANKFURT,GERMANY. NR 28 TC 3 Z9 3 U1 0 U2 3 PU MUSEUM NAT HIST NATURELLE PI PARIS PA 55 RUE DE BUFFON, 75005 PARIS, FRANCE SN 0025-1461 J9 MAMMALIA JI Mammalia PY 1994 VL 58 IS 2 BP 175 EP 181 DI 10.1515/mamm.1994.58.2.175 PG 7 WC Zoology SC Zoology GA NZ520 UT WOS:A1994NZ52000001 ER PT J AU SAVITZ, JD WRIGHT, DA SMUCKER, RA AF SAVITZ, JD WRIGHT, DA SMUCKER, RA TI TOXIC EFFECTS OF THE INSECTICIDE DIFLUBENZURON (DIMILIN(R)) ON SURVIVAL AND DEVELOPMENT OF NAUPLII OF THE ESTUARINE COPEPOD, EURYTEMORA-AFFINIS SO MARINE ENVIRONMENTAL RESEARCH LA English DT Article ID ZERO DOSE CONTROL; CHITIN SYNTHESIS; FLUFENOXURON; INHIBITION; CUTICLE; PREDICT; LARVAE; WATER; CRAB AB This study focused on the effects of the insect growth regulator diflubenzuron (DFB) on nauplii of the estuarine copepod Eurytemora affinis. The 48-h LC50 for DFB and E. affinis nauplii was 2.2 mug/liter DFB. Short-term effects on naupliar survival and development to the copepodite stage were observed following 5 or 6 days exposure to 0.78 mug/liter DFB. These results suggest that DFB has substantial effects on the survival and development of E. affinis at water concentrations of less than 1 mug/liter. The test system included algae and clay added to mimic the maximum amount of kaolin present in the pesticide formulation. These effects may adversely impact natural zooplankton populations which are an important component of the estuarine food chain in Chesapeake Bay and elsewhere. Due to reports of DFB concentrations occasionally exceeding 1 mug/liter in some Chesapeake Bay tributary surface waters, DFB represents a potential risk to E. affinis. C1 CHESAPEAKE BIOL LAB,SOLOMONS,MD 20688. SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. NR 50 TC 13 Z9 15 U1 0 U2 9 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0141-1136 J9 MAR ENVIRON RES JI Mar. Environ. Res. PY 1994 VL 37 IS 3 BP 297 EP 312 DI 10.1016/0141-1136(94)90056-6 PG 16 WC Environmental Sciences; Marine & Freshwater Biology; Toxicology SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Toxicology GA MW970 UT WOS:A1994MW97000004 ER PT B AU KOCHANEK, CS AF KOCHANEK, CS BE Shlosman, I TI THE AFTERMATH OF TIDAL DISRUPTION SO MASS-TRANSFER INDUCED ACTIVITY IN GALAXIES LA English DT Proceedings Paper CT International Astrophysics Conference on Mass-Transfer Induced Activity in Galaxies CY APR 26-30, 1993 CL UNIV KENTUCKY, LEXINGTON, KY SP UNIV KENTUCKY, NASA HO UNIV KENTUCKY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-47195-8 PY 1994 BP 39 EP 43 DI 10.1017/CBO9780511564789.006 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB25F UT WOS:A1994BB25F00005 ER PT B AU MATHUR, S AF MATHUR, S BE Shlosman, I TI EXTENDED STARBURST ACTIVITY-INDUCED BY THE CENTRAL AGN - A MODEL FOR NGC-1068 SO MASS-TRANSFER INDUCED ACTIVITY IN GALAXIES LA English DT Proceedings Paper CT International Astrophysics Conference on Mass-Transfer Induced Activity in Galaxies CY APR 26-30, 1993 CL UNIV KENTUCKY, LEXINGTON, KY SP UNIV KENTUCKY, NASA HO UNIV KENTUCKY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-47195-8 PY 1994 BP 306 EP 307 DI 10.1017/CBO9780511564789.067 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB25F UT WOS:A1994BB25F00066 ER PT J AU BABB, JF AF BABB, JF TI EFFECTIVE OSCILLATOR-STRENGTHS AND TRANSITION ENERGIES FOR THE HYDROGEN MOLECULAR ION SO MOLECULAR PHYSICS LA English DT Article ID INTERACTION COEFFICIENTS; DIPOLE; H-2; HE; POLARIZABILITIES; H-2+(1S-SIGMA-G) AB The variation-perturbation method using finite basis sets is applied to the hydrogen molecular ion H-2(+). Sets of 'pseudostates' consisting of N pairs of effective oscillator strengths and transition energies are determined and tabulations with N = 6, for both parallel and perpendicular electric dipole transitions, are presented over a range of internuclear distances. Various oscillator strength sums, including those involving the logarithms of the transition energies, and Rayleigh-Schrodinger perturbation theoretic expressions are evaluated. In particular, the isotropic and anisotropic components of the dipole-dipole dispersion energy between H-2(+) and each of a number of atoms, H-2, and N-2 are determined using published pseudostates. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP BABB, JF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,SMITHSONIAN ASTROPHY OBSERV,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 42 TC 14 Z9 14 U1 2 U2 7 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD JAN PY 1994 VL 81 IS 1 BP 17 EP 29 DI 10.1080/00268979400100021 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA MY173 UT WOS:A1994MY17300002 ER PT S AU DALGARNO, A AF DALGARNO, A BE Nenner, I TI MOLECULES AND GRAINS IN-SPACE - AN OVERVIEW SO MOLECULES AND GRAINS IN SPACE: 50TH INTERNATIONAL MEETING OF PHYSICAL CHEMISTRY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Molecules and Grains in Space - 50th International Meeting of Physical Chemistry CY SEP, 1993 CL MONT SAINTE-ODILE, FRANCE SP AMER INST PHYS, SOC FRANCAISE CHIM, DIV CHIM PHYS, CTR NATL ETUDES SPATIALES, CNRS, SECTEUR CHIM, CNRS GROUPEMENT RECH PHYS CHIM MOLEC & GRAINS INTERSTELLAIRES, COMMISSARIAT ENERGIE ATOM, DIRECT SCI MATIERE, DRECAM, DIRECT RECH ETUDES & TECH, MINIST EDUC NATL, USDOD, EUROPEAN OFF AEROSPACE RES & DEV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-355-8 J9 AIP CONF PROC PY 1994 IS 312 BP 841 EP 845 PG 5 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Astronomy & Astrophysics; Physics; Spectroscopy GA BB56L UT WOS:A1994BB56L00092 ER PT B AU FELLEY, JD VECCHIONE, M RUSSO, JL ERIXONSTANFORD, M ROPER, CFE AF FELLEY, JD VECCHIONE, M RUSSO, JL ERIXONSTANFORD, M ROPER, CFE GP MARINE TECHNOL SOC TI MULTIMEDIA COMPUTER APPLICATIONS FOR SPECIES IDENTIFICATION - PROTOTYPES FROM A COOPERATIVE VENTURE BETWEEN THE SMITHSONIAN INSTITUTION AND NMFS SO MTS 94 - CHALLENGES AND OPPORTUNITIES IN THE MARINE ENVIRONMENT, PROCEEDINGS LA English DT Proceedings Paper CT Conference on Challenges and Opportunities in the Marine Environment (MTS 94) CY SEP 07-09, 1994 CL WASHINGTON, DC SP MARINE TECHNOL SOC, MARINE TECHNOL SOC, WASHINGTON, DC SECT C1 SMITHSONIAN INST,OFF INFORMAT RESOURCE MANAGEMENT,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MARINE TECHNOLOGY SOC PI WASHINGTON PA 1828 L ST NW, 9TH FL, WASHINGTON, DC 20036 BN 0-933957-13-0 PY 1994 BP 333 EP 337 PG 5 WC Engineering, Environmental; Engineering, Marine; Environmental Sciences; Oceanography; Remote Sensing SC Engineering; Environmental Sciences & Ecology; Oceanography; Remote Sensing GA BD04Q UT WOS:A1994BD04Q00053 ER PT S AU ELVIS, M AF ELVIS, M BE Courvoisier, TJL Blecha, A TI EXTREME QUASARS - OBSERVATIONS AND CONSTRAINTS SO MULTI-WAVELENGTH CONTINUUM EMISSION OF AGN SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 159th Symposium of the International-Astronomical-Union on Multi-Wavelength Continuum Emission of AGN CY AUG 30-SEP 03, 1993 CL GENEVA, SWITZERLAND SP INT ASTRON UNION ID X-RAY-SPECTRA; CONTINUUM ENERGY-DISTRIBUTIONS; EVOLUTION; GALAXIES; NUCLEI AB The range of continuum shape the quasar phenomenon covers is larger than is usually thought, and is limited by observational sensitivity. between 1/3 and 1/2 of all quasars are ''extreme'' in at least one band. We have embarked on a program of observations to explore extreme spectral shapes, and to push to high redshift/luminosity. This paper presents X-ray and multi-wavelength SEDs for 12 z similar to 3 quasars. RP ELVIS, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2744-6 J9 IAU SYMP PY 1994 IS 159 BP 25 EP 28 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA86G UT WOS:A1994BA86G00004 ER PT S AU MATHUR, S AF MATHUR, S BE Courvoisier, TJL Blecha, A TI SPECTRA OF QUASARS WITH EXTREME CONTINUUM PROPERTIES SO MULTI-WAVELENGTH CONTINUUM EMISSION OF AGN SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 159th Symposium of the International-Astronomical-Union on Multi-Wavelength Continuum Emission of AGN CY AUG 30-SEP 03, 1993 CL GENEVA, SWITZERLAND SP INT ASTRON UNION AB The quasar population as a whole covers a wide range of continuum properties; sufficient to cause a marked difference in the physical conditions of the gas in the nuclear region of a quasar. In this paper we will discuss our results on 3C351, an X-ray ''quiet'' quasar; and 3C212, a ''red'' quasar. We identify the ''warm absorber'' observed in the ROSAT observations of 3C351 to be the UV absorber observed by HST. RP MATHUR, S (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2744-6 J9 IAU SYMP PY 1994 IS 159 BP 271 EP 274 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA86G UT WOS:A1994BA86G00039 ER PT B AU ZHAO, P FREEMAN, MD JERIUS, D SHAO, YB AF ZHAO, P FREEMAN, MD JERIUS, D SHAO, YB BE Hoover, RB Walker, ABC TI AXAF VETA-I MIRROR RING FOCUS MEASUREMENTS SO MULTILAYER AND GRAZING INCIDENCE X-RAY/EUV OPTICS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Multilayer and Grazing Incidence X-Ray/EUV Optics II CY JUL 14-16, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1260-0 J9 P SOC PHOTO-OPT INS PY 1994 VL 2011 BP 59 EP 74 DI 10.1117/12.167238 PG 16 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BZ74W UT WOS:A1994BZ74W00006 ER PT B AU JOENSEN, KD HOGHOJ, P CHRISTENSEN, F GORENSTEIN, P SUSINI, J ZIEGLER, E FREUND, A WOOD, J AF JOENSEN, KD HOGHOJ, P CHRISTENSEN, F GORENSTEIN, P SUSINI, J ZIEGLER, E FREUND, A WOOD, J BE Hoover, RB Walker, ABC TI MULTILAYERED SUPERMIRROR STRUCTURES FOR HARD X-RAY SYNCHROTRON AND ASTROPHYSICS INSTRUMENTATION SO MULTILAYER AND GRAZING INCIDENCE X-RAY/EUV OPTICS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Multilayer and Grazing Incidence X-Ray/EUV Optics II CY JUL 14-16, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 6 Z9 6 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1260-0 J9 P SOC PHOTO-OPT INS PY 1994 VL 2011 BP 360 EP 372 DI 10.1117/12.167210 PG 13 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BZ74W UT WOS:A1994BZ74W00034 ER PT B AU JOENSEN, KD GORENSTEIN, P CHRISTENSEN, F GUTMAN, G AF JOENSEN, KD GORENSTEIN, P CHRISTENSEN, F GUTMAN, G BE Hoover, RB Walker, ABC TI GRAZING-INCIDENCE FE-LINE TELESCOPES USING W/B4C MULTILAYERS SO MULTILAYER AND GRAZING INCIDENCE X-RAY/EUV OPTICS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Multilayer and Grazing Incidence X-Ray/EUV Optics II CY JUL 14-16, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1260-0 J9 P SOC PHOTO-OPT INS PY 1994 VL 2011 BP 373 EP 380 DI 10.1117/12.167211 PG 8 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BZ74W UT WOS:A1994BZ74W00035 ER PT J AU GORIESKY, G VANZELST, L AF GORIESKY, G VANZELST, L TI SHEDDING LIGHT ON LIFE + WORK DONE AT THE CONSERVATION-ANALYTICAL-LABORATORY (CAL) RESEARCH AND TRAINING FACILITY OF THE SMITHSONIAN SO MUSEUM INTERNATIONAL LA English DT Article RP GORIESKY, G (reprint author), SMITHSONIAN INST,MUSEUM SUPPORT CTR,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBL LTD PI OXFORD PA 108 COWLEY RD, OXFORD, OXON, ENGLAND OX4 1JF SN 1350-0775 J9 MUSEUM INT JI Mus. Int. PY 1994 VL 46 IS 3 BP 16 EP 20 PG 5 WC Art SC Art GA NY203 UT WOS:A1994NY20300004 ER PT S AU HO, PTP AF HO, PTP BE Genzel, R Harris, AI TI NUCLEAR ISM - FEEDING THE GALACTIC NUCLEUS SO NUCLEI OF NORMAL GALAXIES: LESSONS FROM THE GALACTIC CENTER SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on the Nuclei of Normal Galaxies - Lessons from the Galactic Center, in Honor of Professor Peter G Mezger on his 65th Birthday CY JUL 25-30, 1993 CL SCHLOSS RINGBERG, KREUTH, GERMANY SP NATO HO SCHLOSS RINGBERG DE GALACTIC NUCLEI; INTERSTELLAR MEDIUM; GALACTIC CENTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3158-3 J9 NATO ADV SCI INST SE PY 1994 VL 445 BP 149 EP 160 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC67X UT WOS:A1994BC67X00020 ER PT S AU MORAN, JM AF MORAN, JM BE Genzel, R Harris, AI TI MEZGER,PETER AND THE DEVELOPMENT OF RADIO ASTRONOMY IN THE UNITED-STATES AND GERMANY, AND THE DISCOVERY OF RADIO RECOMBINATION LINES SO NUCLEI OF NORMAL GALAXIES: LESSONS FROM THE GALACTIC CENTER SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on the Nuclei of Normal Galaxies - Lessons from the Galactic Center, in Honor of Professor Peter G Mezger on his 65th Birthday CY JUL 25-30, 1993 CL SCHLOSS RINGBERG, KREUTH, GERMANY SP NATO HO SCHLOSS RINGBERG DE RADIO RECOMBINATION LINES; HISTORY OF RADIO ASTRONOMY; NATIONAL-RADIO-ASTRONOMY-OBSERVATORY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3158-3 J9 NATO ADV SCI INST SE PY 1994 VL 445 BP 475 EP 488 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC67X UT WOS:A1994BC67X00058 ER PT S AU ARONSON, RB AF ARONSON, RB BE Ansell, AD Gibson, RN Barnes, M TI SCALE-INDEPENDENT BIOLOGICAL PROCESSES IN THE MARINE-ENVIRONMENT SO OCEANOGRAPHY AND MARINE BIOLOGY, VOL 32: AN ANNUAL REVIEW SE Oceanography and Marine Biology LA English DT Review ID TRACE FOSSIL THALASSINOIDES; SELF-ORGANIZED CRITICALITY; PREDATOR-PREY INTERACTION; SEA SPECIES-DIVERSITY; DEEP-SEA; EVOLUTIONARY IMPLICATIONS; COMMUNITY STRUCTURE; MASS EXTINCTIONS; CORAL REEFS; FISH PREDATION AB Scale is important in ecology and evolution, yet available evidence indicates that a number of biological processes are scale-independent. The morphology and abundance of prey respond to local increases in predation pressure, and those responses scale up to produce analogous evolutionary patterns. The onshore-offshore direction of increasing predation in the Mesozoic is mirrored in ecological time and space by onshore-offshore gradients in human predation within modern marine food chains. There is also evidence of scale-independence in herbivore-algal interactions and in competitive interactions among bryozoans. Bioturbation effects may also be scale-independent but the evidence is incomplete. Data on evolutionary diversification and extinction generally have been interpreted as demonstrating the effects of scale. At least some aspects of diversification and extinction prove, however, to be scale-independent when considered from a system-wide perspective rather than from the perspective of the affected organisms. If biological processes are generally scale-independent, two persistent theoretical problems, the origin of high diversity in the deep-sea and succession in reef biotas, may have relatively simple solutions. Scale-independent biological processes may be a consequence of self-organized criticality, in which the threshold behaviour of large, interactive systems leads to self-similar dynamics. C1 RUTGERS STATE UNIV, INST MARINE & COASTAL SCI, NEW BRUNSWICK, NJ 08903 USA. RP ARONSON, RB (reprint author), SMITHSONIAN INST, NATL MUSEUM NAT HIST, DEPT INVERTEBRATE ZOOL, WASHINGTON, DC 20560 USA. NR 251 TC 26 Z9 28 U1 1 U2 6 PU U C L PRESS LTD PI LONDON PA UNIV COLL LONDON, GOWER STREET, LONDON WC1E 6BT, ENGLAND SN 0078-3218 BN 1-85728-236-1 J9 OCEANOGR MAR BIOL JI Oceanogr. Mar. Biol. PY 1994 VL 32 BP 435 EP 460 PG 26 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA BB49M UT WOS:A1994BB49M00009 ER PT B AU Baliunas, S Shelton, JC Russell, J Donahue, RA AF Baliunas, S Shelton, JC Russell, J Donahue, RA BE Pyper, DM Angione, RJ TI Adaptive optics at Mount Wilson Observatory: Results from the 60-inch telescope SO OPTICAL ASTRONOMY FROM THE EARTH AND MOON SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Astronomical-Society-of-the-Pacific Summer Scientific Meeting on Optical Astronomy From the Earth and Moon CY JUL 13-15, 1993 CL SAN DIEGO, CA SP Astron Soc Pacific C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-74-0 J9 ASTR SOC P PY 1994 VL 55 BP 56 EP 67 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33U UT WOS:A1994BE33U00006 ER PT B AU Latham, DW Geary, JC AF Latham, DW Geary, JC BE Pyper, DM Angione, RJ TI Custom CCDs for spectroscopy SO OPTICAL ASTRONOMY FROM THE EARTH AND MOON SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Astronomical-Society-of-the-Pacific Summer Scientific Meeting on Optical Astronomy From the Earth and Moon CY JUL 13-15, 1993 CL SAN DIEGO, CA SP Astron Soc Pacific C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-74-0 J9 ASTR SOC P PY 1994 VL 55 BP 108 EP 112 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33U UT WOS:A1994BE33U00012 ER PT B AU Fabricant, D Cheimets, P AF Fabricant, D Cheimets, P BE Pyper, DM Angione, RJ TI A new CCD spectrograph for the Tillinghast Telescope SO OPTICAL ASTRONOMY FROM THE EARTH AND MOON SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Meeting Abstract CT Astronomical-Society-of-the-Pacific Summer Scientific Meeting on Optical Astronomy From the Earth and Moon CY JUL 13-15, 1993 CL SAN DIEGO, CA SP Astron Soc Pacific C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-74-0 J9 ASTR SOC P PY 1994 VL 55 BP 161 EP 161 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE33U UT WOS:A1994BE33U00019 ER PT B AU JOENSEN, KD GORENSTEIN, P CHRISTENSEN, FE HOGHOJ, P ZIEGLER, E SUSINI, J FREUND, A WOOD, J AF JOENSEN, KD GORENSTEIN, P CHRISTENSEN, FE HOGHOJ, P ZIEGLER, E SUSINI, J FREUND, A WOOD, J BE Abeles, F TI MULTILAYER SUPERMIRRORS - BROAD-BAND REFLECTION COATINGS FOR THE 15 KEV TO 100 KEV RANGE SO OPTICAL INTERFERENCE COATINGS, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Interference Coatings CY JUN 06-10, 1994 CL GRENOBLE, FRANCE SP DIRECT RECH ETUDES & TECH, FRANCE, MINIST ENSEIGNEMENT SUPER & RECH, FRANCE, COMMISS EUROPEAN COMMUNITIES, DIRECTORATE GEN SCI RES & DEV, OPT SOC AMER, EUROPEAN OPT SOC, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1562-6 J9 P SOC PHOTO-OPT INS PY 1994 VL 2253 BP 299 EP 308 PG 10 WC Materials Science, Coatings & Films; Optics SC Materials Science; Optics GA BC17V UT WOS:A1994BC17V00031 ER PT J AU SMITH, RW TATAREWICZ, JN AF SMITH, RW TATAREWICZ, JN TI COUNTING ON INVENTION - DEVICES AND BLACK-BOXES IN VERY BIG SCIENCE SO OSIRIS LA English DT Article RP SMITH, RW (reprint author), SMITHSONIAN INST,NATL AIR SPACE MUSEUM,DEPT SPACE HIST,WASHINGTON,DC 20560, USA. NR 56 TC 3 Z9 3 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0369-7827 J9 OSIRIS JI Osiris PY 1994 VL 9 BP 101 EP 123 DI 10.1086/368732 PG 23 WC History & Philosophy Of Science SC History & Philosophy of Science GA NZ811 UT WOS:A1994NZ81100007 ER PT J AU BLACKMAN, EG FIELD, GB AF BLACKMAN, EG FIELD, GB TI RELATIVISTIC MAGNETIC RECONNECTION SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT International Workshop on Acceleration and Radiation Generation in Space and Laboratory Plasmas CY AUG 29-SEP 04, 1993 CL KARDAMYLI, GREECE ID SYNCHROTRON SOURCES; ACCELERATION; RADIATION; FIELDS; PLASMA AB We study the kinematics of the relativistic Sweet-Parker and Petschek reconnection models for a magnetically dominated relativistic pair plasma and find that the steady state inflow velocity to the resistive region can approach the relativistic Alfven speed when the outflow velocity does. This allows for a much faster rate of energy conversion than in the nonrelativistic regime and may be important in astrophysical settings. RP BLACKMAN, EG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 16 TC 1 Z9 1 U1 1 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1994 VL T52 BP 93 EP 95 DI 10.1088/0031-8949/1994/T52/016 PG 3 WC Physics, Multidisciplinary SC Physics GA PR472 UT WOS:A1994PR47200017 ER PT J AU KUNC, JA AF KUNC, JA TI IONIZATION OF MUONIC ATOMS BY NONRELATIVISTIC ELECTRONS SO PHYSICAL REVIEW A LA English DT Article ID CROSS-SECTIONS; IMPACT IONIZATION; HYDROGEN; APPROXIMATIONS; ENERGY; IONS; BEAM; HE+ AB Analytical expressions for cross sections for ionization of muonic hydrogenlike atoms by nonrelativistic electrons are derived using the classical impulse approximation. C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. UNIV SO CALIF,DEPT AEROSP ENGN,LOS ANGELES,CA 90089. UNIV SO CALIF,DEPT PHYS,LOS ANGELES,CA 90089. RP KUNC, JA (reprint author), HARVARD UNIV,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138, USA. NR 39 TC 3 Z9 3 U1 0 U2 1 PU AMERICAN 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 1994 VL 49 IS 1 BP 338 EP 347 DI 10.1103/PhysRevA.49.338 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MT258 UT WOS:A1994MT25800043 ER PT J AU YOUNG, AR GARDNER, LD SAVIN, DW LAFYATIS, GP CHUTJIAN, A BLIMAN, S KOHL, JL AF YOUNG, AR GARDNER, LD SAVIN, DW LAFYATIS, GP CHUTJIAN, A BLIMAN, S KOHL, JL TI MEASUREMENT OF C3+ DIELECTRONIC RECOMBINATION IN A KNOWN EXTERNAL-FIELD SO PHYSICAL REVIEW A LA English DT Article ID SELECTIVE ELECTRON-CAPTURE; EXPERIMENTAL APPARATUS; CROSS-SECTION; IONS; EXCITATION; IMPACT AB An experiment to measure the dielectronic recombination of C3+ in a known external electric field is described. The measured value differs from results of calculations which do not include the effects of field enhancement, and is larger than but marginally in agreement with predictions of theoretical methods that include the effects of the external field. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Savin, Daniel/B-9576-2012 OI Savin, Daniel/0000-0002-1111-6610 NR 27 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN 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 1994 VL 49 IS 1 BP 357 EP 362 DI 10.1103/PhysRevA.49.357 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MT258 UT WOS:A1994MT25800046 ER PT S AU MATTISON, EM COYLE, LM VESSOT, RFC ARNOLD, D SMITH, RC AF MATTISON, EM COYLE, LM VESSOT, RFC ARNOLD, D SMITH, RC GP IEEE TI A TIME TRANSFER TECHNIQUE USING A SPACE-BORNE HYDROGEN MASER AND LASER PULSE TIMING SO PROCEEDINGS OF THE 1994 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (THE 48TH ANNUAL SYMPOSIUM) SE PROCEEDINGS OF THE IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM LA English DT Proceedings Paper CT 48th Annual IEEE International Frequency Control Symposium CY JUN 01-03, 1994 CL BOSTON, MA SP IEEE, ULTRASON FERROELECT & FREQUENCY CONTROL SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1075-6787 BN 0-7803-1945-1 J9 P IEEE INT FREQ CONT PY 1994 BP 684 EP 686 DI 10.1109/FREQ.1994.398260 PG 3 WC Engineering, Electrical & Electronic; Physics, Condensed Matter SC Engineering; Physics GA BC17U UT WOS:A1994BC17U00102 ER PT S AU VESSOT, RFC BOYD, DA COYLE, LM JENDROCK, RF MATTISON, EM NYSTROM, GU HOFFMAN, TE AF VESSOT, RFC BOYD, DA COYLE, LM JENDROCK, RF MATTISON, EM NYSTROM, GU HOFFMAN, TE GP IEEE TI A HYDROGEN MASER FOR LONG-TERM OPERATION IN SPACE SO PROCEEDINGS OF THE 1994 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (THE 48TH ANNUAL SYMPOSIUM) SE PROCEEDINGS OF THE IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM LA English DT Proceedings Paper CT 48th Annual IEEE International Frequency Control Symposium CY JUN 01-03, 1994 CL BOSTON, MA SP IEEE, ULTRASON FERROELECT & FREQUENCY CONTROL SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1075-6787 BN 0-7803-1945-1 J9 P IEEE INT FREQ CONT PY 1994 BP 709 EP 715 DI 10.1109/FREQ.1994.398258 PG 7 WC Engineering, Electrical & Electronic; Physics, Condensed Matter SC Engineering; Physics GA BC17U UT WOS:A1994BC17U00105 ER PT J AU HUANG, YM AF HUANG, YM TI AEDES (STEGOMYIA) MATTINGLYORUM, A NEW SPECIES OF THE DENDROPHILUS GROUP (DIPTERA, CULICIDAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE CULICIDAE; MOSQUITOS; AEDES; DENDROPHILUS GROUP AB Adults of both sexes, the pupa and larva of Aedes (Stegomyia) mattinglyorum n. sp. are described and illustrated. Characters for distinguishing the adults of Ae. mattinglyorum from closely allied species are given. The distribution of Ae. mattinglyorum is based on examined specimens. RP HUANG, YM (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,MSC-C1109,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD JAN PY 1994 VL 96 IS 1 BP 11 EP 21 PG 11 WC Entomology SC Entomology GA MU904 UT WOS:A1994MU90400003 ER PT J AU HAYASHI, I KOYAMA, K OZAKI, M MIYATA, E TSUNEMI, H HUGHES, JP PETRE, R AF HAYASHI, I KOYAMA, K OZAKI, M MIYATA, E TSUNEMI, H HUGHES, JP PETRE, R TI X-RAY SPECTROSCOPY OF SNR E0102-72 WITH THE ASCA SATELLITE SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN LA English DT Article DE ISM, INDIVIDUAL OBJECTS (E0102-72); ISM, SUPERNOVA REMNANTS; X-RAYS, SOURCES; X-RAYS, SPECTRA ID SMALL MAGELLANIC CLOUD; SUPERNOVA-REMNANTS; SPECTRUM AB The ASCA satellite has obtained a moderate-re-solution energy spectrum of E0102-72, the brightest SNR in the Small Magellanic Cloud. This paper reports on the first results of the analysis of the high quality spectrum of E0102-72. The spectrum shows resolved emission lines of He-like Kalpha, H-like Kalpha, and Kbeta from oxygen, neon, and magnesium. The intensity ratios of these lines cannot be explained by a multi-component plasma model with uniform abundances, but requires abundance inhomogeneity in the plasma. We demonstrate how the spectral capabilities of the ASCA SIS make available new diagnostics of X-ray plasmas in a state of non-equilibrium ionization. Some interpretation based on the spectral analysis is also given. C1 OSAKA UNIV,FAC SCI,DEPT EARTH & SPACE SCI,TOYONAKA,OSAKA 560,JAPAN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NASA,GSFC,GREENBELT,MD 20771. RP HAYASHI, I (reprint author), KYOTO UNIV,FAC SCI,DEPT PHYS,SAKYO KU,KYOTO 60601,JAPAN. RI Ozaki, Masanobu/K-1165-2013 NR 13 TC 35 Z9 35 U1 2 U2 2 PU ASTRONOMICAL SOC JAPAN PI TOKYO PA C/O NATIONAL ASTRONOM OBSERV MITAKA-SHI, TOKYO 181, JAPAN SN 0004-6264 J9 PUBL ASTRON SOC JPN JI Publ. Astron. Soc. Jpn. PY 1994 VL 46 IS 3 BP L121 EP L124 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NV124 UT WOS:A1994NV12400017 ER PT B AU RYBICKI, GB KLEYNA, JT AF RYBICKI, GB KLEYNA, JT BE Gondhalekar, PM Horne, K Peterson, BM TI Study of reverberation lags and spreads in NGC 5548 SO REVERBERATION MAPPING OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 10th Rutherford-Appleton-Laboratory Workshop on Astronomy and Astrophysics - Reverberation Mapping of the Broad-Line Region in Active Galactic Nuclei CY MAY 23-25, 1994 CL ABINGDON, ENGLAND SP Rutherford Appleton Lab, Ohio State Univ C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 11 Z9 11 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-88-0 J9 ASTR SOC P PY 1994 VL 69 BP 85 EP 93 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD49J UT WOS:A1994BD49J00005 ER PT B AU HERRE, EA AF HERRE, EA BE Zeigler, RS Leong, SA Teng, PS TI FIGS, WASPS, NEMATODES AND SITTING DUCKS - RICE BLAST, FROM THE OUTSIDE LOOKING IN SO RICE BLAST DISEASE LA English DT Proceedings Paper CT Conference on Rice Blast Disease CY AUG 09-13, 1993 CL MADISON, WI RP HERRE, EA (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU C A B INTERNATIONAL PI WALLINGFORD PA WALLINGFORD, OXON, ENGLAND 0X10 8DE BN 0-85198-935-7 PY 1994 BP 309 EP 318 PG 10 WC Agronomy; Plant Sciences; Entomology SC Agriculture; Plant Sciences; Entomology GA BC46Z UT WOS:A1994BC46Z00018 ER PT B AU GINGERICH, O AF GINGERICH, O BE Rae, M Regan, H Stenhouse, J TI IS THERE A ROLE FOR NATURAL THEOLOGY TODAY SO SCIENCE AND THEOLOGY: QUESTIONS AT THE INTERFACE LA English DT Proceedings Paper CT Conference on Science and Theology - Questions at the Interface CY AUG, 1993 CL UNIV OTAGO, DUNEDIN, NEW ZEALAND SP OTAGO THEOL FDN, UNIV OTAGO, UNIV EXTENS HO UNIV OTAGO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU WILLIAM B EERDMANS PUBL CO PI GRAND RAPIDS PA 225 JEFFERSON AVE SE, GRAND RAPIDS, MI 49502 BN 0-8028-0816-6 PY 1994 BP 29 EP 48 PG 20 WC Religion SC Religion GA BB99S UT WOS:A1994BB99S00002 ER PT S AU VANDIVER, PB AF VANDIVER, PB BE Barkatt, A VanKonynenburg, RA TI CORROSION OF SYNTHESIZED GLASSES AND GLAZES AS ANALOGS FOR NUCLEAR WASTE GLASS DEGRADATION SO SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT XVII SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Scientific Basis for Nuclear Waste Management XVII, at the 1993 Fall Meeting of the Materials-Research-Society CY NOV 29-DEC 03, 1993 CL BOSTON, MA SP MAT RES SOC C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-232-4 J9 MATER RES SOC SYMP P PY 1994 VL 333 BP 969 EP 982 PG 14 WC Engineering, Environmental; Materials Science, Ceramics; Nuclear Science & Technology SC Engineering; Materials Science; Nuclear Science & Technology GA BA13E UT WOS:A1994BA13E00115 ER PT S AU SCHACHTER, JF ELVIS, M AF SCHACHTER, JF ELVIS, M BE Fichtel, CE Gehrels, N Norris, JP TI NEW GRO OBSERVATIONS OF X-RAY SELECTED QUASARS AND BL LACS SO SECOND COMPTON SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd Compton Symposium CY SEP 20-22, 1993 CL UNIV MARYLAND, ADULT EDUC CTR, COLL PK, MD HO UNIV MARYLAND, ADULT EDUC CTR C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-261-6 J9 AIP CONF PROC PY 1994 IS 304 BP 679 EP 683 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA55S UT WOS:A1994BA55S00119 ER PT S AU BECKER, MA TUROSS, N AF BECKER, MA TUROSS, N BE Kaplan, D Adams, WW Farmer, B Viney, C TI INITIAL DEGRADATIVE CHANGES FOUND IN BOMBYX-MORI SILK FIBROIN SO SILK POLYMERS: MATERIALS SCIENCE AND BIOTECHNOLOGY SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Workshop on Silk Polymers: Biology, Structure, Properties, Genetics CY JAN 28-29, 1993 CL CHARLOTTESVILLE, VA SP AMER CHEM SOC, DIV POLYM CHEM INC ID AMORPHOUS CODING SEQUENCES; INTERNAL STRUCTURE; GENE; CRYSTALLINE AB Color evaluation, surface morphology, amino acid composition, solubility and molecular weight distributions are used to describe the initial degradative changes in Bombyx mori silk fibroin resulting primarily from irradiation with UV and visible light. The biochemical techniques are more sensitive detectors of the initial chemical alterations of the fibroin molecule than either color evaluation or morphology. The data suggest selective destruction of amino acids accompanied by peptide bond cleavage. The peptide bond cleavage mechanism is initially selective and becomes random with increased irradiation. C1 JOHNS HOPKINS UNIV,DEPT MAT SCI & ENGN,BALTIMORE,MD 21218. SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. NR 38 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 SN 0097-6156 BN 0-8412-2743-8 J9 ACS SYM SER PY 1994 VL 544 BP 252 EP 269 PG 18 WC Biotechnology & Applied Microbiology; Chemistry, Multidisciplinary; Entomology; Materials Science, Biomaterials; Polymer Science SC Biotechnology & Applied Microbiology; Chemistry; Entomology; Materials Science; Polymer Science GA BZ58L UT WOS:A1994BZ58L00022 ER PT J AU SCHEFFRAHN, RH DARLINGTON, JPEC COLLINS, MS KRECEK, J SU, NY AF SCHEFFRAHN, RH DARLINGTON, JPEC COLLINS, MS KRECEK, J SU, NY TI TERMITES (ISOPTERA, KALOTERMITIDAE, RHINOTERMITIDAE, TERMITIDAE) OF THE WEST-INDIES SO SOCIOBIOLOGY LA English DT Article AB Species and island lists are provided for termites recorded from the Greater and Lesser Antilles, Bahamas, and associated islands including Curacao, Bermuda, and Caymans. Ninety-eight species from 3 Families are included from 60 islands of the West Indies. C1 UNIV CAMBRIDGE,MUSEUM ZOOL,CAMBRIDGE CB2 3EJ,ENGLAND. SMITHSONIAN INST,DEPT ENTOMOL,WASHINGTON,DC 20560. RP SCHEFFRAHN, RH (reprint author), UNIV FLORIDA,FT LAUDERDALE RES & EDUC CTR,INST FOOD & AGR SCI,FT LAUDERDALE,FL 33314, USA. NR 23 TC 42 Z9 42 U1 0 U2 1 PU CALIF STATE UNIV PI CHICO PA DEPT BIOL SCI, CHICO, CA 95929 SN 0361-6525 J9 SOCIOBIOLOGY JI Sociobiology PY 1994 VL 24 IS 2 BP 213 EP 238 PG 26 WC Entomology SC Entomology GA PL905 UT WOS:A1994PL90500007 ER PT S AU PLUCINSKY, PP SNOWDEN, SL ASCHENBACH, B EGGER, R EDGAR, RJ MCCAMMON, D AF PLUCINSKY, PP SNOWDEN, SL ASCHENBACH, B EGGER, R EDGAR, RJ MCCAMMON, D BE Schlegel, EM Petre, R TI ROSAT SURVEY OBSERVATIONS OF THE MONOGEM RING SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 3 EP & PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00001 ER PT S AU FIORE, F AF FIORE, F BE Schlegel, EM Petre, R TI THE COMPLEX SOFT-X-RAY SPECTRUM OF LOW-REDSHIFT QUASARS SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 95 EP 104 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00013 ER PT S AU WORRALL, DM BIRKINSHAW, M AF WORRALL, DM BIRKINSHAW, M BE Schlegel, EM Petre, R TI SEPARATION OF X-RAY-EMISSION COMPONENTS IN RADIO GALAXIES SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 110 EP 114 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00015 ER PT S AU JONES, C FORMAN, W AF JONES, C FORMAN, W BE Schlegel, EM Petre, R TI HOT GAS AND IRON ABUNDANCES IN GALAXIES SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 4 Z9 4 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 129 EP 138 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00018 ER PT S AU HUGHES, JP AF HUGHES, JP BE Schlegel, EM Petre, R TI ROSAT HRI OBSERVATIONS OF MAGELLANIC CLOUD SUPERNOVA-REMNANTS SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 144 EP 153 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00020 ER PT S AU DAVID, LP JONES, C FORMAN, W AF DAVID, LP JONES, C FORMAN, W BE Schlegel, EM Petre, R TI COSMOLOGICAL IMPLICATIONS OF ROSAT OBSERVATIONS OF GROUPS AND CLUSTERS OF GALAXIES SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OI Forman, William/0000-0002-9478-1682 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 178 EP 182 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00025 ER PT S AU GORENSTEIN, P HUGHES, JP TUCKER, WH AF GORENSTEIN, P HUGHES, JP TUCKER, WH BE Schlegel, EM Petre, R TI DETECTION OF X-RAYS FRON SN-1987A WITH ROSAT SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 205 EP 210 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00028 ER PT S AU CONROY, MA AF CONROY, MA BE Schlegel, EM Petre, R TI QPTOOLS - TOOLS FOR CREATING AND MANIPULATING IRAF QPOE DATA SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 233 EP 235 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00032 ER PT S AU DEPONTE, J CONROY, MA AF DEPONTE, J CONROY, MA BE Schlegel, EM Petre, R TI TEMPORAL DATA SCREENING IN PROS SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 236 EP 238 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00033 ER PT S AU DAINES, S JONES, C FORMAN, W TYSON, A AF DAINES, S JONES, C FORMAN, W TYSON, A BE Schlegel, EM Petre, R TI A ROSAT PSPC OBSERVATION OF THE LENSING CLUSTER-A1689 SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 369 EP 371 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00070 ER PT S AU HUGHES, JP BIRKINSHAW, M AF HUGHES, JP BIRKINSHAW, M BE Schlegel, EM Petre, R TI COMPLEX SPATIAL STRUCTURES IN SUNYAEV-ZELDOVICH DECREMENT CLUSTERS ABELL-665 AND CL0016+16 SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 378 EP 379 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00073 ER PT S AU BIRKINSHAW, M WORRALL, DM AF BIRKINSHAW, M WORRALL, DM BE Schlegel, EM Petre, R TI HI AND THE X-RAY-SPECTRUM OF HGC-6251 SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 397 EP 399 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00079 ER PT S AU WORRALL, DM LAWRENCE, CR PEARSON, TJ READHEAD, ACS AF WORRALL, DM LAWRENCE, CR PEARSON, TJ READHEAD, ACS BE Schlegel, EM Petre, R TI X-RAY-EMISSION IN POWERFUL RADIO GALAXIES AND QUASARS SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Pearson, Timothy/N-2376-2015 OI Pearson, Timothy/0000-0001-5213-6231 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 409 EP 411 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00083 ER PT S AU SIEMIGINOWSKA, A FIORE, F ELVIS, M WILKES, BJ MCDOWELL, JC MATHUR, S AF SIEMIGINOWSKA, A FIORE, F ELVIS, M WILKES, BJ MCDOWELL, JC MATHUR, S BE Schlegel, EM Petre, R TI OPTICAL UV SOFT-X-RAY QUASAR SPECTRA - MODELS VS OBSERVATIONS SO SOFT X-RAY COSMOS: ROSAT SCIENCE SYMPOSIUM SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT ROSAT Science Symposium/Data Analysis Workshop CY NOV 08-10, 1993 CL COLLEGE PK, MD SP AMER INST PHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-327-2 J9 AIP CONF PROC PY 1994 IS 313 BP 412 EP 414 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB56K UT WOS:A1994BB56K00084 ER PT B AU ADAMS, RM AF ADAMS, RM BE Baker, RS TI SOIL AND WATER AS CRITICAL FACTORS IN THE HISTORY OF THE FERTILE CRESCENT SO SOIL AND WATER SCIENCE: KEY TO UNDERSTANDING OUR GLOBAL ENVIRONMENT LA English DT Proceedings Paper CT Symposium on Soil and Water Science - Key to Understanding Our Global Environment CY NOV 10, 1993 CL CINCINNATI, OH SP SOIL SCI SOC AMER C1 SMITHSONIAN INST,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SOIL SCIENCE SOC AMER PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 BN 0-89118-816-9 PY 1994 BP 11 EP 14 PG 4 WC Agronomy; Soil Science SC Agriculture GA BC07Q UT WOS:A1994BC07Q00002 ER PT B AU HABBAL, SR ARNDT, MB KAROVSKA, M AF HABBAL, SR ARNDT, MB KAROVSKA, M BE Balasubramaniam, KS Simon, GW TI The discrete nature of the variable emission in active region loops SO SOLAR ACTIVE REGION EVOLUTION: COMPARING MODELS WITH OBSERVATIONS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 14th NSO/SP International Summer Workshop on Solar Active Region Evolution - Comparing Models with Observations CY AUG 30-SEP 03, 1993 CL NATL SOLAR OBSERV, SACRAMENTO PEAK SUNSPOT, NM SP Natl Solar Observ, Natl Opt Astron Observ, Div Atmospher Sci, Natl Sci Fdn, Space Sci Div, NASA, AFOSR, European Off Aerosp Res & Dev, AFOSR, Asian Off Sci Res & Dev HO NATL SOLAR OBSERV C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-87-2 J9 ASTR SOC P PY 1994 VL 68 BP 314 EP 320 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD49H UT WOS:A1994BD49H00040 ER PT B AU GOLUB, L AF GOLUB, L BE Balasubramaniam, KS Simon, GW TI The NIXT and SWATH experiments SO SOLAR ACTIVE REGION EVOLUTION: COMPARING MODELS WITH OBSERVATIONS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 14th NSO/SP International Summer Workshop on Solar Active Region Evolution - Comparing Models with Observations CY AUG 30-SEP 03, 1993 CL NATL SOLAR OBSERV, SACRAMENTO PEAK SUNSPOT, NM SP Natl Solar Observ, Natl Opt Astron Observ, Div Atmospher Sci, Natl Sci Fdn, Space Sci Div, NASA, AFOSR, European Off Aerosp Res & Dev, AFOSR, Asian Off Sci Res & Dev HO NATL SOLAR OBSERV C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-87-2 J9 ASTR SOC P PY 1994 VL 68 BP 329 EP 334 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD49H UT WOS:A1994BD49H00042 ER PT B AU PASACHOFF, JM AF PASACHOFF, JM BE Rusin, V Heinzel, P Vial, JC TI CORONAL MORPHOLOGY AND HEATING MECHANISM OBSERVATIONS AT TOTAL ECLIPSES THROUGH 1992 SO SOLAR CORONAL STRUCTURES LA English DT Proceedings Paper CT 144th Colloquium of the International-Astronomical-Union on Solar Coronal Structures, on the Occasion of the 50th Anniversary of the Skalnate-Pleso-Observatory CY SEP 20-24, 1993 CL TATRANSKA LOMNICA, SLOVAKIA SP AIR TRANSPORT EUROPE, POPRAD, SLOVAKIA, AKAD VZDELAVANIA, POPRAD, SLOVAKIA, ART AGCY IPP, POPRAD, SLOVAKIA, ASTRON INST, TATRANSKA LOMNICA, SLOVAKIA, ASTRON INST, ONDREJOV, CZECH REPUBLIC, COMENIUS UNIV, DEPT ASTRON & ASTROPHYS, BRATISLAVA, SLOVAKIA, EUROPEAN SPACE AGCY, EDEN CLUB, STARA LESNA, SLOVAKIA, INT ASTRON UNION, LOCAL MUNICIPAL, STARY SMOKOVEC, SLOVAKIA, OBSERV & PLANETARIUM, PRESOV, SLOVAKIA, OTF A S, NIZNA, SLOVAKIA, PARSEK, SR O, PRAGUE, CZECH REPUBLIC, SLOVAK ASTRON SOC, SLOVAK CTR AMATEUR ASTRON, HURBANOVO, SLOVAKIA, SLOVENSKA STATNA SPORITELNA, POPRAD, SLOVAKIA, T A N A P, TATRANSKA LOMNICA, SLOVAKIA, TAKAJ, SLOVENSKE NOVE MESTO, SLOVAKIA, WHIRLPOOL TATRAMAT CO, POPRAD MATEJOVCE, SLOVAKIA DE SUN; ECLIPSES; CORONA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU VEDA PI BRATISLAVA PA SLOVAK ACAD SCIENCES KLEMENSOVA 19, BRATISLAVA, 81430, SLOVAK REPUBLIC BN 80-224-0090-4 PY 1994 BP 523 EP 527 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC99K UT WOS:A1994BC99K00100 ER PT B AU PASACHOFF, JM AF PASACHOFF, JM BE Rusin, V Heinzel, P Vial, JC TI TOTAL SOLAR ECLIPSES, 1994-1999 SO SOLAR CORONAL STRUCTURES LA English DT Proceedings Paper CT 144th Colloquium of the International-Astronomical-Union on Solar Coronal Structures, on the Occasion of the 50th Anniversary of the Skalnate-Pleso-Observatory CY SEP 20-24, 1993 CL TATRANSKA LOMNICA, SLOVAKIA SP AIR TRANSPORT EUROPE, POPRAD, SLOVAKIA, AKAD VZDELAVANIA, POPRAD, SLOVAKIA, ART AGCY IPP, POPRAD, SLOVAKIA, ASTRON INST, TATRANSKA LOMNICA, SLOVAKIA, ASTRON INST, ONDREJOV, CZECH REPUBLIC, COMENIUS UNIV, DEPT ASTRON & ASTROPHYS, BRATISLAVA, SLOVAKIA, EUROPEAN SPACE AGCY, EDEN CLUB, STARA LESNA, SLOVAKIA, INT ASTRON UNION, LOCAL MUNICIPAL, STARY SMOKOVEC, SLOVAKIA, OBSERV & PLANETARIUM, PRESOV, SLOVAKIA, OTF A S, NIZNA, SLOVAKIA, PARSEK, SR O, PRAGUE, CZECH REPUBLIC, SLOVAK ASTRON SOC, SLOVAK CTR AMATEUR ASTRON, HURBANOVO, SLOVAKIA, SLOVENSKA STATNA SPORITELNA, POPRAD, SLOVAKIA, T A N A P, TATRANSKA LOMNICA, SLOVAKIA, TAKAJ, SLOVENSKE NOVE MESTO, SLOVAKIA, WHIRLPOOL TATRAMAT CO, POPRAD MATEJOVCE, SLOVAKIA DE SUN; ECLIPSES; CORONA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU VEDA PI BRATISLAVA PA SLOVAK ACAD SCIENCES KLEMENSOVA 19, BRATISLAVA, 81430, SLOVAK REPUBLIC BN 80-224-0090-4 PY 1994 BP 579 EP 584 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC99K UT WOS:A1994BC99K00111 ER PT B AU GARDNER, LD HASSLER, DM STRACHAN, L KOHL, JL AF GARDNER, LD HASSLER, DM STRACHAN, L KOHL, JL BE Rusin, V Heinzel, P Vial, JC TI SPARTAN-201 OBSERVATIONS OF THE ULTRAVIOLET EXTENDED SOLAR CORONA SO SOLAR CORONAL STRUCTURES LA English DT Proceedings Paper CT 144th Colloquium of the International-Astronomical-Union on Solar Coronal Structures, on the Occasion of the 50th Anniversary of the Skalnate-Pleso-Observatory CY SEP 20-24, 1993 CL TATRANSKA LOMNICA, SLOVAKIA SP AIR TRANSPORT EUROPE, POPRAD, SLOVAKIA, AKAD VZDELAVANIA, POPRAD, SLOVAKIA, ART AGCY IPP, POPRAD, SLOVAKIA, ASTRON INST, TATRANSKA LOMNICA, SLOVAKIA, ASTRON INST, ONDREJOV, CZECH REPUBLIC, COMENIUS UNIV, DEPT ASTRON & ASTROPHYS, BRATISLAVA, SLOVAKIA, EUROPEAN SPACE AGCY, EDEN CLUB, STARA LESNA, SLOVAKIA, INT ASTRON UNION, LOCAL MUNICIPAL, STARY SMOKOVEC, SLOVAKIA, OBSERV & PLANETARIUM, PRESOV, SLOVAKIA, OTF A S, NIZNA, SLOVAKIA, PARSEK, SR O, PRAGUE, CZECH REPUBLIC, SLOVAK ASTRON SOC, SLOVAK CTR AMATEUR ASTRON, HURBANOVO, SLOVAKIA, SLOVENSKA STATNA SPORITELNA, POPRAD, SLOVAKIA, T A N A P, TATRANSKA LOMNICA, SLOVAKIA, TAKAJ, SLOVENSKE NOVE MESTO, SLOVAKIA, WHIRLPOOL TATRAMAT CO, POPRAD MATEJOVCE, SLOVAKIA DE SPARTAN; UV CORONA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU VEDA PI BRATISLAVA PA SLOVAK ACAD SCIENCES KLEMENSOVA 19, BRATISLAVA, 81430, SLOVAK REPUBLIC BN 80-224-0090-4 PY 1994 BP 631 EP 634 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC99K UT WOS:A1994BC99K00122 ER PT B AU BLOEMHOF, EE AF BLOEMHOF, EE BE Buhrman, RA Clarke, J Daly, K Koch, RH Luine, JA Simon, RW TI HIGH-CURRENT DENSITY, SMALL-AREA SIS JUNCTIONS FOR HIGH-FREQUENCY RADIO ASTRONOMY SO SUPERCONDUCTIVE DEVICES AND CIRCUITS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Superconductive Devices and Circuits CY JAN 25-27, 1994 CL LOS ANGELES, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1455-7 J9 P SOC PHOTO-OPT INS PY 1994 VL 2160 BP 63 EP 73 DI 10.1117/12.180990 PG 11 WC Physics, Condensed Matter; Polymer Science SC Physics; Polymer Science GA BB27J UT WOS:A1994BB27J00008 ER PT J AU COURTNEY, GW AF COURTNEY, GW TI REVISION OF PALEARCTIC MOUNTAIN MIDGES (DIPTERA, DEUTEROPHLEBIIDAE), WITH PHYLOGENETIC AND BIOGEOGRAPHIC ANALYSES OF WORLD SPECIES SO SYSTEMATIC ENTOMOLOGY LA English DT Article ID PATTERNS; ONTOGENY AB The mountain midges (Diptera: Deuterophlebiidae) of the Palaearctic Region are revised to include eight species. Four new species are described: D.brachyrhina sp.nov., D.oporina sp.nov. and D.blepharis sp.nov. from the Himalayas (Assam and Sikkim), and D. bicarinata sp.nov. from southern Korea. A lectotype is designated for D.mirabilis Edwards, and a key to adult males of all Palaearctic species is provided. Larval, pupal and adult characters were used to reconstruct the phylogenetic and biogeographic relationships of world species of Deuterophlebiidae. Based on features of the adult male, the Himalayan species D. brachyrhina and D. oporina are considered the most primitive deuterophlebiids. The Nearctic species D.inyoensis is proposed as the sister group of the remaining species. Relationships among the latter are based primarily on larval and pupal characters; however, lack of information about the immature stages of several Palaearctic species contributes to a poorly resolved phylogeny. Several alternative hypotheses are presented and discussed. All phylogenetic alternatives suggest that the Nearctic fauna originated from at least two invasions of North America. RP COURTNEY, GW (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,NHB 169,WASHINGTON,DC 20560, USA. NR 45 TC 6 Z9 6 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0307-6970 J9 SYST ENTOMOL JI Syst. Entomol. PD JAN PY 1994 VL 19 IS 1 BP 1 EP 24 DI 10.1111/j.1365-3113.1994.tb00576.x PG 24 WC Evolutionary Biology; Entomology SC Evolutionary Biology; Entomology GA NB016 UT WOS:A1994NB01600001 ER PT J AU ADROSKO, RJ AF ADROSKO, RJ TI BIBLIOTHECA-TINCTORIA - ANNOTATED CATALOG OF THE EDELSTEIN,SIDNEY,M. COLLECTION IN THE HISTORY OF BLEACHING, DYEING, FINISHING AND SPOT REMOVING - RON,M SO TECHNOLOGY AND CULTURE LA English DT Book Review RP ADROSKO, RJ (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JAN PY 1994 VL 35 IS 1 BP 181 EP 183 DI 10.2307/3106758 PG 3 WC History & Philosophy Of Science SC History & Philosophy of Science GA NE947 UT WOS:A1994NE94700012 ER PT J AU FIELD, CR AF FIELD, CR TI ARCHITECTURE AND PLANNING OF GRAHAM, ANDERSON, PROBST AND WHITE, 1912-1936 - TRANSFORMING TRADITION - CHAPPELL,SAK SO TECHNOLOGY AND CULTURE LA English DT Book Review RP FIELD, CR (reprint author), SMITHSONIAN INST,OFF ARCHITECTURAL HIST & HIST PRESERVAT,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JAN PY 1994 VL 35 IS 1 BP 203 EP 205 DI 10.2307/3106770 PG 3 WC History & Philosophy Of Science SC History & Philosophy of Science GA NE947 UT WOS:A1994NE94700025 ER PT S AU HARTMANN, L AF HARTMANN, L BE Duschl, WJ Frank, J Meyer, F MeyerHofmeister, E Tscharnuter, WM TI MAGNETOSPHERIC ACCRETION AND WINDS FROM PRE-MAIN-SEQUENCE DISKS SO THEORY OF ACCRETION DISKS - 2 SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Theory of Accretion Disks - 2 CY MAR 22-26, 1993 CL MAX PLANCK INST ASTROPHYSIK, GARCHING, GERMANY SP NATO SCI COMM HO MAX PLANCK INST ASTROPHYSIK C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-2609-1 J9 NATO ADV SCI INST SE PY 1994 VL 417 BP 19 EP 33 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ61H UT WOS:A1994BZ61H00002 ER PT S AU NARAYAN, R POPHAM, R AF NARAYAN, R POPHAM, R BE Duschl, WJ Frank, J Meyer, F MeyerHofmeister, E Tscharnuter, WM TI ACCRETION DISK BOUNDARY-LAYERS SO THEORY OF ACCRETION DISKS - 2 SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Theory of Accretion Disks - 2 CY MAR 22-26, 1993 CL MAX PLANCK INST ASTROPHYSIK, GARCHING, GERMANY SP NATO SCI COMM HO MAX PLANCK INST ASTROPHYSIK C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-2609-1 J9 NATO ADV SCI INST SE PY 1994 VL 417 BP 293 EP 307 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ61H UT WOS:A1994BZ61H00030 ER PT B AU PRESS, WH RYBICKI, GB AF PRESS, WH RYBICKI, GB BE Weigend, AS Gershenfeld, NA TI LARGE-SCALE LINEAR METHODS FOR INTERPOLATION, REALIZATION, AND RECONSTRUCTION OF NOISY, IRREGULARLY SAMPLED-DATA SO TIME SERIES PREDICTION: FORECASTING THE FUTURE AND UNDERSTANDING THE PAST: PROCEEDINGS OF THE NATO ADVANCED RESEARCH WORKSHOP ON COMPARATIVE TIME SERIES ANALYSIS SE SANTA FE INSTITUTE STUDIES IN THE SCIENCES OF COMPLEXITY - PROCEEDINGS VOLUMES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Comparative Time Series Analysis CY MAY 14-17, 1992 CL SANTA FE, NM SP SANTA FE INST, NATO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 1 PU ADDISON-WESLEY PUBL CO PI READING PA ROUTE 128, READING, MA 01867 BN 0-201-62602-0 J9 SFI S SCI C PY 1994 VL 15 BP 493 EP 512 PG 20 WC Computer Science, Hardware & Architecture; Neurosciences; Physics, Mathematical; Statistics & Probability SC Computer Science; Neurosciences & Neurology; Physics; Mathematics GA BA71R UT WOS:A1994BA71R00023 ER PT J AU KNOWLTON, N JACKSON, JBC AF KNOWLTON, N JACKSON, JBC TI NEW TAXONOMY AND NICHE PARTITIONING ON CORAL REEDS - JACK OF ALL TRADES OR MASTER OF SOME SO TRENDS IN ECOLOGY & EVOLUTION LA English DT Review ID REPRODUCTIVE ISOLATION; ACROPORA-PALIFERA; GENETIC-STRUCTURE; DIVERSITY; SEA; SCLERACTINIA; POPULATIONS; ECHINOMETRA; RECRUITMENT; SPECIATION AB Recent taxonomic advances are challenging widely held theories of the ecology and evolution of coral reef invertebrates and communities. large numbers of sibling species have been discovered across a variety of higher taxa. Differences in distribution, behavior and life history characteristics among sibling species demonstrate that niche diversification is more finely tuned, and interactions among organisms more specific, than most reef ecologists believed previously. Ecological and evolutionary understanding depends on good taxonomy. RP KNOWLTON, N (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 43 TC 122 Z9 125 U1 2 U2 22 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0169-5347 J9 TRENDS ECOL EVOL JI Trends Ecol. Evol. PD JAN PY 1994 VL 9 IS 1 BP 7 EP 9 DI 10.1016/0169-5347(94)90224-0 PG 3 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA MN316 UT WOS:A1994MN31600006 PM 21236753 ER PT J AU DEQUEIROZ, K GAUTHIER, J AF DEQUEIROZ, K GAUTHIER, J TI TOWARD A PHYLOGENETIC SYSTEM OF BIOLOGICAL NOMENCLATURE SO TRENDS IN ECOLOGY & EVOLUTION LA English DT Article ID TAXONOMY; DEFINITIONS; NAMES AB Despite the widely held belief that modern biological taxonomy is evolutionary, some of the most fundamental concepts and principles in the current system of biological nomenclature are based on a nonevolutionary convention that predates widespread acceptance of an evolutionary world view by more than a century. The development of a phylogenetic system of nomenclature requires reformulating these concepts and principles so that they are no longer based on the Linnean categories but on the tenet of common descent. C1 CALIF ACAD SCI,DEPT HERPETOL,SAN FRANCISCO,CA 94118. RP DEQUEIROZ, K (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT VERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 27 TC 298 Z9 306 U1 2 U2 13 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0169-5347 J9 TRENDS ECOL EVOL JI Trends Ecol. Evol. PD JAN PY 1994 VL 9 IS 1 BP 27 EP 31 DI 10.1016/0169-5347(94)90231-3 PG 5 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA MN316 UT WOS:A1994MN31600013 PM 21236760 ER PT B AU HOTTON, CL LEFFINGWELL, HA SKVARLA, JJ AF HOTTON, CL LEFFINGWELL, HA SKVARLA, JJ BE Kurmann, MH Doyle, JA TI POLLEN ULTRASTRUCTURE OF PANDANACEAE AND THE FOSSIL GENUS PANDANIIDITES SO ULTRASTRUCTURE OF FOSSIL SPORES AND POLLEN: ITS BEARING ON RELATIONSHIPS AMONG FOSSIL AND LIVING GROUPS LA English DT Proceedings Paper CT 8th International Palynological Conference CY SEP 06-12, 1992 CL AIX EN PROVENCE, FRANCE C1 SMITHSONIAN INST,DEPT PALEOBIOL,MRC,NHB 121,WASHINGTON,DC 20560. NR 0 TC 16 Z9 17 U1 0 U2 1 PU ROYAL BOTANIC GARDENS PI RICHMOND PA KEW, RICHMOND, SURREY, ENGLAND TW9 3AE BN 0-947643-60-5 PY 1994 BP 173 EP 191 PG 19 WC Plant Sciences; Geology SC Plant Sciences; Geology GA BB74S UT WOS:A1994BB74S00011 ER PT B AU MARZKE, R HUCHRA, J AF MARZKE, R HUCHRA, J BE Balkowski, C KraanKorteweg, RC TI Mapping large scale structure behind the Galactic plane SO UNVEILING LARGE-SCALE STRUCTURES BEHIND THE MILKY WAY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Unveiling Large-Scale Structures Behind the Milky Way CY JAN 18-21, 1994 CL OBSERV PARIS MEUDON, MEUDON, FRANCE SP Observ Paris, Kapteyn Lab Groningen, CNRS, Univ Paris 7 HO OBSERV PARIS MEUDON C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-86-4 J9 ASTR SOC P PY 1994 VL 67 BP 113 EP 120 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD49G UT WOS:A1994BD49G00013 ER PT B AU SOCCI, AD AF SOCCI, AD BE Shen, SY TI A 1ST APPROXIMATION TO A PLANETARY CONTINUUM OF CLIMATE CONTROLS AND FEEDBACKS ASSOCIATED WITH GLOBAL WARMING AND GLOBAL COOLING .2. SO WORLD RESOURCE REVIEW, VOL 4, NO 2-4: GLOBAL WARMING: PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE 1992 SE GLOBAL WARMING INTERNATIONAL CENTER MONOGRAPH SERIES LA English DT Proceedings Paper CT Global Warming: Proceedings of the 3rd International Conference 1992 CY 1992 CL CHICAGO, IL C1 SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SUPCON INTERNATIONAL PI WOODRIDGE PA PO BOX 5275, WOODRIDGE, IL 60517-0275 BN 0-9634567-2-5 J9 GLOB WARM INT CTR M PY 1994 BP 188 EP 241 PG 54 WC Environmental Sciences SC Environmental Sciences & Ecology GA BA36S UT WOS:A1994BA36S00004 ER PT B AU FINESCHI, S ROMOLI, M GARDNER, LD KOHL, JL NOCI, G AF FINESCHI, S ROMOLI, M GARDNER, LD KOHL, JL NOCI, G BE Fineschi, S TI ULTRAVIOLET CORONAGRAPH SPECTROMETER FOR THE SOLAR-AND-HELIOSPHERIC-OBSERVATORY - OPTICAL TESTINGS SO X-RAY AND ULTRAVIOLET SPECTROSCOPY AND POLARIMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-ray and Ultraviolet Spectroscopy and Polarimetry CY JUL 28-29, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE VUV SPECTROSCOPY; GRATING SCATTERING C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Romoli, Marco/H-6859-2012 NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1607-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2283 BP 30 EP 46 DI 10.1117/12.193204 PG 17 WC Astronomy & Astrophysics; Remote Sensing; Spectroscopy SC Astronomy & Astrophysics; Remote Sensing; Spectroscopy GA BB88L UT WOS:A1994BB88L00004 ER PT B AU JOENSEN, KD GORENSTEIN, P CHRISTENSEN, FE HOGHOJ, P ZIEGLER, E SUSINI, J FREUND, A SIDDONS, DP WOOD, J AF JOENSEN, KD GORENSTEIN, P CHRISTENSEN, FE HOGHOJ, P ZIEGLER, E SUSINI, J FREUND, A SIDDONS, DP WOOD, J BE Fineschi, S TI PROSPECTS FOR SUPERMIRRORS IN HARD X-RAY SPECTROSCOPY SO X-RAY AND ULTRAVIOLET SPECTROSCOPY AND POLARIMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-ray and Ultraviolet Spectroscopy and Polarimetry CY JUL 28-29, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE SUPERMIRROR; MULTILAYER DESIGN; X-RAY OPTICS; X-RAY INSTRUMENTATION; TELESCOPES; X-RAY ASTROPHYSICS; SYNCHROTRON OPTICS; X-RAY PLASMA DIAGNOSTICS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1607-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2283 BP 130 EP 141 DI 10.1117/12.193181 PG 12 WC Astronomy & Astrophysics; Remote Sensing; Spectroscopy SC Astronomy & Astrophysics; Remote Sensing; Spectroscopy GA BB88L UT WOS:A1994BB88L00014 ER PT B AU ROMOLI, M FINESCHI, S GARDNER, LD KOHL, JL AF ROMOLI, M FINESCHI, S GARDNER, LD KOHL, JL BE Fineschi, S TI POLARIZATION CHARACTERIZATION OF LY alpha HOLOGRAPHIC GRATINGS WITH A TRIPLE-REFLECTION POLARIZER SO X-RAY AND ULTRAVIOLET SPECTROSCOPY AND POLARIMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-ray and Ultraviolet Spectroscopy and Polarimetry CY JUL 28-29, 1994 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE VUV SPECTROSCOPY; VUV POLARIMETRY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Romoli, Marco/H-6859-2012 NR 0 TC 2 Z9 2 U1 1 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1607-X J9 P SOC PHOTO-OPT INS PY 1994 VL 2283 BP 288 EP 297 DI 10.1117/12.193203 PG 10 WC Astronomy & Astrophysics; Remote Sensing; Spectroscopy SC Astronomy & Astrophysics; Remote Sensing; Spectroscopy GA BB88L UT WOS:A1994BB88L00030 ER PT J AU BROWN, JL CITINO, SB SHAW, J MILLER, C AF BROWN, JL CITINO, SB SHAW, J MILLER, C TI ENDOCRINE PROFILES DURING THE ESTROUS-CYCLE AND PREGNANCY IN THE BAIRDS TAPIR (TAPIRUS-BAIRDII) SO ZOO BIOLOGY LA English DT Article DE ESTRADIOL; ESTROGENS; PROGESTERONE; CORTISOL AB Serum samples were collected 1-3 times weekly from two Baird's tapirs (Tapirus bairdii) for 6 months in 1987-1988, and for more than 3 consecutive years beginning in 1989 to characterize hormone patterns during the estrous cycle and pregnancy. Based on serum progesterone concentrations, mean (+/-SEM) duration of the estrous cycle (n = 20) was 30.8 +/- 2.6 days (range, 25-38 days) with a luteal phase length of 18.1 +/- 0.4 days (range, 15-20 days). Mean peak serum progesterone concentrations during the luteal phase were 1.35 +/- 0.16 ng/ml, and nadir concentrations were 0.19 +/- 0.03 ng/ml during the interluteal period. Distinct surges of estradiol preceded luteal phase progesterone increases in most (14/20) cycles. Gestation length was 392 +/- 4 days for three complete pregnancies. Mean serum progesterone concentrations increased throughout gestation and were 1.83 +/- 0.13, 2.73 +/- 0.13, and 4.30 +/- 0.16 ng/ml during early, mid- and late gestation, respectively. Serum estradiol concentrations began to rise during mid-gestation, increasing dramatically during the last week of pregnancy. Patterns of serum estriol and estrone secretion during pregnancy were similar to that observed for estradiol. In contrast to progesterone and estrogens, serum cortisol concentrations were unchanged during pregnancy or parturition. Females resumed cycling 16.2 +/- 2.0 days after parturition (n = 4) and, on two occasions, females became pregnant during the first postpartum estrus. These data suggest that the tapir cycles at approximately monthly intervals and that increases in serum progesterone are indicative of luteal activity. The interluteal period is relatively long, comprising approximately 40% of the estrous cycle. During gestation, progesterone concentrations are increased above luteal phase levels, and there is evidence of increased estrogen production during late gestation. The absence of increased cortisol secretion at the end of gestation suggests that this steroid does not play a major role in initiating parturition in this species. (C) 1994 Wiley-Liss, Inc. RP BROWN, JL (reprint author), SMITHSONIAN INST,CTR CONSERVAT & RES,1500 REMOUNT RD,FRONT ROYAL,VA 22630, USA. NR 0 TC 15 Z9 15 U1 0 U2 18 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1994 VL 13 IS 2 BP 107 EP 117 DI 10.1002/zoo.1430130203 PG 11 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA NG520 UT WOS:A1994NG52000002 ER PT J AU KLEIMAN, DG AF KLEIMAN, DG TI ANIMAL BEHAVIOR STUDIES AND ZOO PROPAGATION PROGRAMS - FOREWORD SO ZOO BIOLOGY LA English DT Editorial Material RP KLEIMAN, DG (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008, USA. NR 0 TC 4 Z9 4 U1 0 U2 3 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1994 VL 13 IS 5 BP 411 EP 412 DI 10.1002/zoo.1430130503 PG 2 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA QH184 UT WOS:A1994QH18400002 ER PT J AU KLEIMAN, DG AF KLEIMAN, DG TI MAMMALIAN SOCIOBIOLOGY AND ZOO BREEDING PROGRAMS SO ZOO BIOLOGY LA English DT Article; Proceedings Paper CT Symposium on The Contribution of Animal Behavior Studies to Zoo Propagation Programs CY SEP 16, 1994 CL OMAHA, NE SP AMER ZOO & AQUARIUM ASSOC DE ANIMAL BEHAVIOR; PROPAGATION; REPRODUCTION AB This report discusses the impact of the social and physical environment on the potential for reproductive success of mammals in toes. Several examples are provided of the importance of understanding the physical requirements as well as the mating system and social dynamics of a species (rather than just the group size and demography) when deciding on a management strategy. Additionally, the effects of social characteristics are stressed, such as familiarity on reproductive inhibition and stimulation both within and between the sexes and the impact these may have on the success or failure of a breeding program. (C) 1994 Wiley-Liss, Inc. RP KLEIMAN, DG (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008, USA. NR 0 TC 13 Z9 15 U1 2 U2 6 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1994 VL 13 IS 5 BP 423 EP 432 DI 10.1002/zoo.1430130505 PG 10 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA QH184 UT WOS:A1994QH18400004 ER PT J AU CARLSTEAD, K SHEPHERDSON, D AF CARLSTEAD, K SHEPHERDSON, D TI EFFECTS OF ENVIRONMENTAL ENRICHMENT ON REPRODUCTION SO ZOO BIOLOGY LA English DT Article; Proceedings Paper CT Symposium on The Contribution of Animal Behavior Studies to Zoo Propagation Programs CY SEP 16, 1994 CL OMAHA, NE SP AMER ZOO & AQUARIUM ASSOC DE REARING; STRESS; AROUSAL; ENVIRONMENTAL COMPLEXITY; SOCIAL BEHAVIOR AB Although there have been few demonstrations of a direct empirical relationship between environmental enrichment and reproductive success in captive animals, indirect and anecdotal evidence indicates the importance of physical and temporal complexity for reproduction. We discuss three major mechanisms through which environmental enrichment that specifically increases the complexity of an animal's surroundings may influence reproductive physiology and behavior: developmental processes, modulation of stress and arousal, and modification of social interactions. In complex environments developing animals learn that performing active behavior produces appropriate functional outcomes. Learning to control their environment influences their ability to adapt to novel situations, which may profoundly influence their reproductive behavior as adults in breeding situations. Chronic stress may compromise reproductive physiology and behavior; enrichment reduces stress by providing increased opportunity for behavioral coping responses. However, some degree of acute stress may be beneficial for reproduction by maintaining an animal's level of responsiveness to socio-sexual stimuli necessary for sexual arousal and reproductive activation. Finally, environmental enrichment may influence reproductive success by stabilizing social groups, reducing aggression and increasing affiliative and play behaviors. It is concluded that multi-variate multi-institutional behavioral research in toes will play an increasingly important role in the successful captive propagation of many species by closely examining relationships between environmental variables and reproductive potential of individual animals. (C) 1994 Wiley-Liss, Inc. RP CARLSTEAD, K (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 0 TC 86 Z9 95 U1 11 U2 71 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1994 VL 13 IS 5 BP 447 EP 458 DI 10.1002/zoo.1430130507 PG 12 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA QH184 UT WOS:A1994QH18400006 ER PT J AU MANNING, RB AF MANNING, RB TI A NEW DEEP-SEA CRAB, GENUS CHACEON, FROM INDONESIA (CRUSTACEA, DECAPODA, GERYONIDAE) SO RAFFLES BULLETIN OF ZOOLOGY LA English DT Article AB Chaceon karubar, the first species of the genus to be recorded from Indonesian waters, is described from a specimen collected off the Tanimbar Islands. This new species resembles C. granulatus (Sakai) from Japan and differs from all other species known from the central and western Pacific in having depressed dactyli on the walking legs. It differs from C. granulatus in having longer walking legs with a distal spine on the merus and in having an outer spine on the carpus of the chelipeds. RP MANNING, RB (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 0 TC 7 Z9 7 U1 2 U2 2 PU NATL UNIV SINGAPORE, DEPT ZOOLOGY PI SINGAPORE PA KENT RIDGE, SINGAPORE 0511, SINGAPORE SN 0217-2445 J9 RAFFLES B ZOOL JI Raffles Bull. Zool. PD DEC 31 PY 1993 VL 41 IS 2 BP 169 EP 172 PG 4 WC Zoology SC Zoology GA MV500 UT WOS:A1993MV50000001 ER PT J AU SWEATMAN, HPA AF SWEATMAN, HPA TI TROPICAL SNAPPER (LUTJANIDAE) THAT IS PISCIVOROUS AT SETTLEMENT SO COPEIA LA English DT Note ID GREAT BARRIER-REEF; DAMSELFISHES POMACENTRIDAE; POPULATION-STRUCTURE; JUVENILE MORTALITY; FISHES; RECRUITMENT; DURATION; PACIFIC; LARVAE; GENUS C1 SMITHSONIAN TROP RES INST, BALBOA, PANAMA. NR 18 TC 17 Z9 17 U1 0 U2 1 PU AMER SOC ICHTHYOLOGISTS & HERPETOLOGISTS PI MIAMI PA MAUREEN DONNELLY, SECRETARY FLORIDA INT UNIV BIOLOGICAL SCIENCES, 11200 SW 8TH STREET, MIAMI, FL 33199 USA SN 0045-8511 EI 1938-5110 J9 COPEIA JI Copeia PD DEC 28 PY 1993 IS 4 BP 1137 EP 1139 PG 3 WC Zoology SC Zoology GA MP586 UT WOS:A1993MP58600025 ER PT J AU ESTALELLA, R MAUERSBERGER, R TORRELLES, JM ANGLADA, G GOMEZ, JF LOPEZ, R MUDERS, D AF ESTALELLA, R MAUERSBERGER, R TORRELLES, JM ANGLADA, G GOMEZ, JF LOPEZ, R MUDERS, D TI THE MOLECULAR CORES IN THE L1287, AFGL-5142, AND IRAS 20126+4104 REGIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, JETS AND OUTFLOWS; ISM, MOLECULES; ISM, INDIVIDUAL OBJECTS, (L1287, RNO 1B/1C, AFGL-5142, IRAS 20126+4104) ID DENSE INTERSTELLAR CLOUDS; FAR-INFRARED SOURCES; DARK CLOUDS; POWERING SOURCES; RADIO-CONTINUUM; STAR FORMATION; OUTFLOWS; AMMONIA; GAS; CO AB The NH3 (J, K) = (1, 1) and (2,2) line emission was mapped toward three regions with molecular outflows, L1287, AFGL 5142, and IRAS 20126+4104, using the Effelsberg 100 m telescope. Additional (CO)-O-18 (J = 2 --> 1) and CS (J = 3 --> 2) observations of L1287 were carried out with the IRAM 30 m telescope. For the three regions, the high-density molecular core, as traced by the ammonia emission, peaks very close to the position of the proposed powering sources of the outflows. In AFGL 5142 we favor the radio continuum source proposed by Torrelles et al. (1992b) as the powering source of the outflow. The molecular cores best resolved by the telescope beam are elongated in a direction perpendicular to the outflow axis. The clearest elongation is seen in the most collimated outflow, that of L1287. For this source, a remarkable velocity gradient can be seen along the major axis of the high-density condensation, consistent with a rotation of the core. For L1287 and AFGL 5142 we find that the masses of the high-density cores are much higher than the masses of the outflows, indicating that the elongation of the cores cannot be a consequence of the interaction with the molecular outflow and that the cores can play an important role in the large-scale collimation of the bipolar molecular outflows. For all the cores the molecular gas is probably heated by an internal source. In particular, in L1287 we find a local heating of the molecular gas and line broadening toward the position of the ammonia peak, indicating a physical association of the high-density gas with the powering source of the outflow. C1 IEC, SOL CATALANA FIS, ASTROFIS LAB, BARCELONA, SPAIN. MAX PLANCK INST RADIOASTRON, D-53121 BONN, GERMANY. CSIC, INST ASTROFIS ANDALUCIA, E-18080 GRANADA, SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP UNIV BARCELONA, DEPT ASTRON & METEOROL, AV DIAGONAL 647, E-08028 BARCELONA, SPAIN. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 47 TC 40 Z9 40 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1993 VL 419 IS 2 BP 698 EP 706 DI 10.1086/173520 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA ML593 UT WOS:A1993ML59300025 ER PT J AU RUFFERT, M CANNIZZO, JK KENYON, SJ AF RUFFERT, M CANNIZZO, JK KENYON, SJ TI THE SECONDARY OUTBURST MAXIMUM OF T-CORONAE BOREALIS - HYDRODYNAMIC SIMULATIONS OF THE BLOB AND ACCRETION DISK SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; HYDRODYNAMICS; STARS, INDIVIDUAL (T-CORONAE BOREALIS) ID ACTIVE GALACTIC NUCLEI; MASSIVE BLACK-HOLE; MAIN-SEQUENCE STAR; WHITE-DWARF; SEMIDETACHED BINARIES; EVOLUTION; NOVAE; COLLISIONS; MODELS; ALPHA AB We continue the investigation of Cannizzo & Kenyon into the model proposed by Webbink to account for the eruptive behavior of the recurrent nova T CrB which occurred in 1946. In particular, we present three-dimensional hydrodynamical computations of the blob of material which is ejected from the mass-losing star in the Webbink model and find that, within several dynamical timescales, the blob should become smeared out by tidal forces and internal gas pressure into a disk-shaped body with roughly constant surface density (as projected onto the orbital plane). We then reexamine the spreading torus model employed by Cannizzo & Kenyon to account for the observed secondary maximum in the 1946 outburst using a one-dimensional accretion disk model within the context of the three-dimensional hydrodynamical results. The model presented by Cannizzo & Kenyon of an exponentially increasing viscosity parameter alpha(t) for the accretion disk is still viable, but the accretion disk flux during early times is much greater than before. In addition, during the time before peak accretion disk luminosity there are two outward-moving transition fronts-one associated with the transition between the low- and high-alpha regions of the disk, and a second associated with the interface between ionized and neutral disk material. These are roughly coincident with each other and are caused by the outward wave of increasing accretion disk viscosity which comes about when one takes a local growth rate for a dependent on the Keplerian frequency. We are able to reproduce the secondary maximum fairly well using 10(-5) and 3 for initial and final values of alpha, and a local growth timescale for alpha of 2/OMEGA. C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RUFFERT, M (reprint author), MAX PLANCK INST ASTROPHYS,POSTFACH 1523,D-85740 GARCHING,GERMANY. OI Kenyon, Scott/0000-0003-0214-609X NR 22 TC 4 Z9 4 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1993 VL 419 IS 2 BP 780 EP 792 DI 10.1086/173530 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA ML593 UT WOS:A1993ML59300035 ER PT J AU PLEIJEL, F FAUCHALD, K AF PLEIJEL, F FAUCHALD, K TI SCALISPINIGERA-OCULATA HARTMAN, 1967 (SCALIBREGMATIDAE, POLYCHAETA) - SENIOR SYNONYM OF LACYDONIA-ANTARCTICA (LACYDONIIDAE) HARTMANN-SCHRODER AND ROSENFELDT, 1988 SO PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON LA English DT Article AB Scalispinigera oculata Hartman, 1967, originally placed in the polychaete family Scalibregmatidae, is transferred to Lacydonia Marion and Bobretzky, 1875, in the family Lacydoniidae. Scalispinigera oculata is the type species of the genus, and Scalispinigera is consequently synonymized with Lacydonia. The second species described in the genus, S. cirrata Hartman and Fauchald, 1971, is likewise transferred to Lacydonia. Based on examination of the types Lacydonia antarctica Hartmann-Schroder and Rosenfeldt, 1988 is considered to be a junior synonym of Lacydonia oculata (Hartman, 1967), new combination. The relationship of L. oculata to L. mikrops Ehlers, 1913 is discussed. C1 SWEDISH MUSEUM NAT HIST,S-10405 STOCKHOLM,SWEDEN. SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560. NR 12 TC 8 Z9 8 U1 0 U2 0 PU BIOL SOC WASHINGTON PI WASHINGTON PA NAT MUSEUM NAT HIST SMITHSONIAN INST, WASHINGTON, DC 20560 SN 0006-324X J9 P BIOL SOC WASH JI Proc. Biol. Soc. Wash. PD DEC 17 PY 1993 VL 106 IS 4 BP 673 EP 677 PG 5 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MN655 UT WOS:A1993MN65500006 ER PT J AU GHOSH, HC MANNING, RB AF GHOSH, HC MANNING, RB TI A NEW DEEP-SEA CRAB OF THE GENUS CHACEON FROM INDIA (CRUSTACEA, DECAPODA, GERYONIDAE) SO PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON LA English DT Article AB Chaceon alcocki, a species with laterally compressed dactyli on the walking legs, is described from a female identified with the European Geryon affinis Milne Edwards & Bouvier, 1894 by Alcock in 1899. It is the sixth species of the genus to be recognized from the western Indian Ocean. C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560. RP GHOSH, HC (reprint author), ZOOL SURVEY INDIA,27 JAWAHARLAL NEHRU RD,CALCUTTA 700016,W BENGAL,INDIA. NR 8 TC 2 Z9 2 U1 0 U2 0 PU BIOL SOC WASHINGTON PI WASHINGTON PA NAT MUSEUM NAT HIST SMITHSONIAN INST, WASHINGTON, DC 20560 SN 0006-324X J9 P BIOL SOC WASH JI Proc. Biol. Soc. Wash. PD DEC 17 PY 1993 VL 106 IS 4 BP 714 EP 718 PG 5 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MN655 UT WOS:A1993MN65500011 ER PT J AU EMMONS, LH AF EMMONS, LH TI A NEW GENUS AND SPECIES OF RAT FROM BORNEO (RODENTIA, MURIDAE) SO PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON LA English DT Article AB A new genus and species of arboreal rat from Sabah, Pithecheirops otion, is described. It is most closely allied to the Sunda Shelf endemic genus Pithecheir, but it differs from this genus in lacking both diagnostic features of the arrangement of the inner ear bones, and the inflation of the auditory bulla. RP EMMONS, LH (reprint author), SMITHSONIAN INST, DIV MAMMALS, MRC 108, WASHINGTON, DC 20560 USA. NR 8 TC 1 Z9 1 U1 0 U2 1 PU BIOL SOC WASHINGTON PI WASHINGTON PA NAT MUSEUM NAT HIST SMITHSONIAN INST, WASHINGTON, DC 20560 USA SN 0006-324X J9 P BIOL SOC WASH JI Proc. Biol. Soc. Wash. PD DEC 17 PY 1993 VL 106 IS 4 BP 752 EP 761 PG 10 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MN655 UT WOS:A1993MN65500016 ER PT J AU ROBINSON, H AF ROBINSON, H TI 3 NEW GENERA OF VERNONIEAE FROM SOUTH-AMERICA, DASYANDANTHA, DASYANTHINA, AND QUECHUALIA (ASTERACEAE) SO PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON LA English DT Article ID LEPIDAPLOA COMPLEX VERNONIEAE; GENUS AB Three new genera of Vernonieae are described from South America, each having Type A pollen and hairs inside the corolla. They are placed in two different subtribes, the arborescent genus Dasyandantha of Venezuela in the Piptocarphinae, the herbaceous Dasyanthina of eastern Brazil and shrubby or scandent and Quechualia of the central Andes, in the Vernoniinae. Dasyandantha has a thyrsoid inflorescence with glomerules of sessile heads. Dasyanthina and Quechualia have thyrsoid inflorescences with corymbiform branches and have glanduliferous anther thecae, but differ in the shape and distribution of the hairs on their corollas. Dasyanthina cuatrecasiana is transferred from Vernonia and Piptocarpha, Dasyanthina serrata, D. palustris, Quechualia cardenasii, Q. fulta, and Q. trixioides are transferred from Vernonia, and Quechualia smithii is described as new. RP ROBINSON, H (reprint author), NATL MUSEUM NAT HIST,SMITHSONIAN INST,DEPT BOT,WASHINGTON,DC 20560, USA. NR 16 TC 8 Z9 8 U1 0 U2 0 PU BIOL SOC WASHINGTON PI WASHINGTON PA NAT MUSEUM NAT HIST SMITHSONIAN INST, WASHINGTON, DC 20560 SN 0006-324X J9 P BIOL SOC WASH JI Proc. Biol. Soc. Wash. PD DEC 17 PY 1993 VL 106 IS 4 BP 775 EP 785 PG 11 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MN655 UT WOS:A1993MN65500018 ER PT J AU NARAYAN, R PIRAN, T AF NARAYAN, R PIRAN, T TI DO GAMMA-RAY BURST SOURCES REPEAT SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Letter DE GAMMA-RAYS, BURSTS ID STARS AB Following the discovery by Quashnock and Lamb of an apparent excess of gamma-ray burst pairs with small angular separations, we reanalyse the angular distribution of the bursts in the BATSE catalogue. We find that, in addition to an excess of close pairs, there is also a comparable excess of antipodal bursts, i.e. pairs of bursts separated by about 180 degrees in the sky. Both excesses are moderately significant. Quashnock and Lamb argue that the excess of burst pairs with small angular separations is evidence that many bursts repeat, but obviously this hypothesis cannot explain the excess of antipodal coincidences. Since the two excesses have similar characteristics, and since we cannot think of any physical model of bursts that can produce antipodal pairs, we suggest that both excesses may be due to some unknown selection effect. C1 HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP NARAYAN, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Narayan, Ramesh/0000-0002-1919-2730 NR 8 TC 20 Z9 20 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 15 PY 1993 VL 265 IS 4 BP L65 EP L68 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MM311 UT WOS:A1993MM31100006 ER PT J AU BARRIOLA, M AF BARRIOLA, M TI NUMERICAL STUDY OF THE COLLAPSE OF A GLOBAL TEXTURE SO PHYSICAL REVIEW D LA English DT Article ID LARGE-SCALE STRUCTURE; ORIGIN AB We study the numerical solution to the full held equations describing the evolution of a spherically symmetric global texture. We concentrate on the evolution of the fields after the texture collapses. We compare this result with a previous analytical solution found by Turok and Spergel using the nonlinear a model approximation. The energy produced in massive modes is of the order of 10(16) GeV and is almost independent of the initial size of the texture. RP BARRIOLA, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD DEC 15 PY 1993 VL 48 IS 12 BP 5576 EP 5580 DI 10.1103/PhysRevD.48.5576 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA MP573 UT WOS:A1993MP57300016 ER PT J AU PERIVOLAROPOULOS, L AF PERIVOLAROPOULOS, L TI ASYMPTOTICS OF NIELSEN-OLESEN VORTICES SO PHYSICAL REVIEW D LA English DT Note AB We,investigate analytically and numerically the asymptotic behavior of the Nielsen-Olesen vortex solutions and show that they approach their asymptotic values exponentially but with exponents that differ from the ones quoted in the literature. In particular, it is shown that for values of the Higgs self-coupling that are larger than a critical value, both the Higgs field and the gauge held approach exponentially their asymptotic values with equal exponents that are independent of the Higgs self-coupling. C1 BROWN UNIV, DEPT PHYS, PROVIDENCE, RI 02912 USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, DIV THEORET ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. OI Perivolaropoulos, Leandros/0000-0001-9330-2371 NR 7 TC 19 Z9 19 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD DEC 15 PY 1993 VL 48 IS 12 BP 5961 EP 5962 DI 10.1103/PhysRevD.48.5961 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA MP573 UT WOS:A1993MP57300056 ER PT J AU MCCARTNEY, M CROTHERS, DSF AF MCCARTNEY, M CROTHERS, DSF TI THE SINGLE IONIZATION OF MULTIELECTRON ATOMS USING THE CONTINUUM-DISTORTED-WAVE EIKONAL-INITIAL-STATE MODEL SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID CROSS-SECTIONS; ION IMPACT; COLLISIONS; PROTON; HELIUM AB Single ionization of lithium, beryllium and neon by ion impact is considered using the continuum-distorted-wave eikonal-initial-state model. Total cross sections, for ionization of lithium by proton, antiproton and alpha particle impact, and for the ionization of beryllium and neon by proton impact are presented. We also present doubly differential cross sections for 1 MeV proton and antiproton impact on lithium. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP MCCARTNEY, M (reprint author), QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,DIV THEORET & COMPUTAT PHYS RES,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. OI McCartney, Mark/0000-0001-9304-419X NR 19 TC 34 Z9 34 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD DEC 14 PY 1993 VL 26 IS 23 BP 4561 EP 4574 DI 10.1088/0953-4075/26/23/024 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MM761 UT WOS:A1993MM76100024 ER PT J AU KOCHANEK, CS AF KOCHANEK, CS TI THE ANALYSIS OF GRAVITATIONAL LENS SURVEYS .2. MAXIMUM-LIKELIHOOD MODELS AND SINGULAR POTENTIALS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY; OBSERVATIONS; GALAXIES; DISTANCES AND REDSHIFTS; GALAXIES; STRUCTURE; GRAVITATIONAL LENSING ID SPHERICAL GALAXIES; VELOCITY DISPERSIONS; LUMINOSITY FUNCTION; QUASAR; LIGHT; DISTRIBUTIONS; SYSTEM; WELLS AB We do a maximum likelihood analysis Of three optical surveys for gravitational lenses. The results are consistent with lensing by normal galaxies modeled as singular isothermal spheres with standard values for observational parameters, aside from the need to add a small amount of ellipticity to produce the observed four image lenses. We tested the model for variations in the number of galaxies, the velocity dispersions of galaxies, the distribution of galaxies, the relation between luminosity and velocity dispersion, the quasar apparent magnitude number counts, and the mean magnification produced by the lenses. No variation we examined significantly improved the likelihoods over using the standard observational values, although there is weak evidence for differences in the magnification bias. The measured isothermal velocity dispersion of an L* E/S0 galaxy is sigma* = 245 km s-1 with a 90% confidence interval of 210 km s-1 less than or similar to sigma* less than or similar 270 km s-1, ignoring the lens 0957+561. This is consistent with the estimated range from dynamical studies of 183-248 km s-1. The measured comoving density of galaxies or dark halos on this mass scale is 6.7 x 10(-3) h3 Mpc-3 with a 90% confidence interval from 2.0 x 10(-3) h3 Mpc-3 to 1.7 x 10(-3) h3 Mpc-3. Depending on systematic assumptions about treating the lens 0957+561 and the contribution of spiral galaxies to lensing, the upper limit on the value of the cosmological constant can be as high as OMEGA(LAMBDA) less than or similar to 0.8 or as low as OMEGA(LAMBDA) less than or similar to 0.45. Doubling the sample size will reduce the confidence intervals to levels where contradictions with other observations may become apparent. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 51 TC 150 Z9 150 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1993 VL 419 IS 1 BP 12 EP 29 DI 10.1086/173455 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MK864 UT WOS:A1993MK86400003 ER PT J AU ZABLUDOFF, AI FRANX, M GELLER, MJ AF ZABLUDOFF, AI FRANX, M GELLER, MJ TI A TECHNIQUE FOR DETECTING STRUCTURE IN CLUSTER VELOCITY DISTRIBUTIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES; CLUSTERING; GALAXIES; DISTANCES AND REDSHIFTS ID HYDRA-I CLUSTER; COMA CLUSTER; CENTAURUS CLUSTER; RICH CLUSTERS; GALAXIES; DYNAMICS; SUBSTRUCTURE; ANISOTROPY AB For clusters with greater than or equal to 100 measured galaxy redshifts, we develop a new method for detecting departures from a Gaussian velocity distribution. We decompose the cluster velocity distribution into a sum of the orthogonal Gauss-Hermite functions. This method quantifies the asymmetric third-order (h3) and symmetric fourth-order (h4) terms of the distribution while minimizing the effect of interlopers in the tails. We apply the method to a sample of eight rich clusters: A426, A548, A1060, A1656, A2151, A2670, DC 2048-52, and Centaurus. Each cluster has more than 100 members with known redshifts. The clusters A548, A1656, DC 2048-52, and Centaurus significantly depart from Gaussian. A1656 and DC 2048-52 have asymmetric velocity distributions; A548 and Centaurus have broad, symmetric distributions. The most likely interpretation is that these systems have substructure. This result is consistent with findings by other authors. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 32 TC 21 Z9 21 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1993 VL 419 IS 1 BP 47 EP 51 DI 10.1086/173457 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MK864 UT WOS:A1993MK86400005 ER PT J AU EVRARD, AE MOHR, JJ FABRICANT, DG GELLER, MJ AF EVRARD, AE MOHR, JJ FABRICANT, DG GELLER, MJ TI A MORPHOLOGY-COSMOLOGY CONNECTION FOR X-RAY-CLUSTERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, THEORY; GALAXIES, CLUSTERING; HYDRODYNAMICS; INTERGALACTIC MEDIUM; METHODS, NUMERICAL; X-RAYS, GALAXIES ID GALAXIES; EVOLUTION; SUBSTRUCTURE; DENSITY AB We employ N-body/three-dimensional gasdynamic simulations of the formation of galaxy clusters to determine whether cluster X-ray morpholgies can be used as cosmological constraints. Confirming the analytic expectations of Richstone, Loeb, & Turner (1992), we demonstrate that cluster evolution is sensitive to the cosmological model in which the clusters form. We further show that evolutionary differences are echoed in the gross morphological features of the cluster X-ray emission. We examine current-epoch X-ray images of models originating from the same initial density fields evolved in three different cosmologies: (1) an unbiased, low-density universe with OMEGA0 = 0.2; (2) an unbiased universe dominated by vacuum energy with OMEGA0 = 0.2 and lambda0 = 0.8 and (3) a biased Einstein-de Sitter model (OMEGA = 1, sigma8 = 0.59). Using measures of X-ray morphology such as the axial ratio and centroid shifting, we demonstrate that clusters evolved in the two low OMEGA0 models are much more regular, spherically symmetric, and centrally condensed than clusters evolved in the Einstein-de Sitter model. This morphology-cosmology connection, along with the availability of a large body of cluster X-ray observations, makes cluster X-ray morphology both a powerful and a practical cosmological discriminant. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP EVRARD, AE (reprint author), UNIV MICHIGAN,DEPT PHYS,1049 RANDALL LAB,ANN ARBOR,MI 48109, USA. NR 24 TC 34 Z9 34 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1993 VL 419 IS 1 BP L9 EP L12 DI 10.1086/187124 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MK865 UT WOS:A1993MK86500003 ER PT J AU BUFFETT, BA MATHEWS, PM HERRING, TA SHAPIRO, II AF BUFFETT, BA MATHEWS, PM HERRING, TA SHAPIRO, II TI FORCED NUTATIONS OF THE EARTH - CONTRIBUTIONS FROM THE EFFECTS OF ELLIPTICITY AND ROTATION ON THE ELASTIC DEFORMATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID INNER CORE DYNAMICS; RADIO INTERFEROMETRY; MANTLE; ANELASTICITY; GEODESY; MODEL; TIDES AB We determine the deformation produced by the lunisolar tidal potential in a rotating, spheroidal model Earth. We proceed by decomposing the equations of motion into separate, though coupled, equations for the nutational and deformational parts of the Earth's response. Using this scheme, we derive a simpler set of equations for the deformational displacements, where the driving forces include not only the tidal terms but also inertial forces and gravitational perturbations associated with the nutational motions. We show that the deformations are affected only to a very small extent by the Earth's asphericity and rotation. This fact is exploited to set up a perturbative procedure, whereby the equation governing the deformation is separated into equations of zeroth and first orders in the perturbation. In the initial calculation (the zeroth order), the influences of the Earth's asphericity and the inertial forces associated with the deformation are neglected, while the forces arising from the nutational motions are taken into account. The resulting calculation for the quasi-static deformation is equivalent to the so-called spherical approximation used by Sasao et al. (1980), although the solutions obtained here are physically more insightful. This zeroth-order calculation in used to determine the compliances defined in the work of Mathews et al. (1991a), which characterize the deformability of the Earth. In the second step of the calculation, the solutions obtained under the spherical approximation are used to determine corrections to the deformation for the omitted effects of ellipticity and inertia (including the Coriolis force). Corresponding corrections to the zeroth-order compliances used by Mathews et al. (1991b) are found to be nominally O(epsilon) smaller than the zeroth-order compliances, where epsilon is the geometric ellipticity (surface flattening) of the Earth. As a consequence of these corrections to the compliance parameters, changes in the nutation amplitudes as computed by Mathews et al. (1991b) are produced, which amount to -0.18, 0.46, and 0.26 milliarseconds, in the prograde semiannual, and the retrograde annual and 18.6-year terms, respectively. Additional corrections are introduced if we require the theoretical value of the retrograde annual nutation to match the determination made using very long baseline interferometry. The procedure presented here to account for the effects of ellipticity and rotation could also be used to determine corrections to nutations for the effects of anelasticity in the mantle and inner core or for the effects of lateral heterogeneity in the Earth's density and elastic properties. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 41 TC 20 Z9 20 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD DEC 10 PY 1993 VL 98 IS B12 BP 21659 EP 21676 DI 10.1029/92JB01339 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA ML693 UT WOS:A1993ML69300001 ER PT J AU NADKARNI, NM PARKER, G AF NADKARNI, NM PARKER, G TI CANOPY NETWORK SO NATURE LA English DT Letter C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RP NADKARNI, NM (reprint author), EVERGREEN STATE COLL,LAB 1,OLYMPIA,WA 98585, USA. OI Parker, Geoffrey/0000-0001-7055-6491 NR 0 TC 0 Z9 1 U1 0 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 9 PY 1993 VL 366 IS 6455 BP 502 EP 502 DI 10.1038/366502c0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA ML218 UT WOS:A1993ML21800021 ER PT J AU CLIFTON, KE ROBERTSON, DR AF CLIFTON, KE ROBERTSON, DR TI RISKS OF ALTERNATIVE MATING TACTICS SO NATURE LA English DT Letter ID PREDATION RP CLIFTON, KE (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 6 TC 15 Z9 15 U1 0 U2 3 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 9 PY 1993 VL 366 IS 6455 BP 520 EP 520 DI 10.1038/366520b0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA ML218 UT WOS:A1993ML21800053 ER PT J AU HARD, RJ MERRILL, WL AF HARD, RJ MERRILL, WL TI MOBILITY, LAND FRAGMENTATION, AND ECONOMIC RATIONALITY SO AMERICAN ANTHROPOLOGIST LA English DT Note C1 SMITHSONIAN INST,DEPT ANTHROPOL,WASHINGTON,DC 20560. RP HARD, RJ (reprint author), UNIV TEXAS,DIV BEHAV & CULTURAL SCI,SAN ANTONIO,TX 78285, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0002-7294 J9 AM ANTHROPOL JI Am. Anthropol. PD DEC PY 1993 VL 95 IS 4 BP 1005 EP 1007 DI 10.1525/aa.1993.95.4.02a00150 PG 3 WC Anthropology SC Anthropology GA MN386 UT WOS:A1993MN38600014 ER PT J AU LINARES, OF AF LINARES, OF TI WEALTH AND HIERARCHY IN THE INTERMEDIATE AREA - A SYMPOSIUM AT DUMBARTON-OAKS, OCTOBER 10-11, 1987 - LANGE,FW SO AMERICAN ANTHROPOLOGIST LA English DT Book Review RP LINARES, OF (reprint author), SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0002-7294 J9 AM ANTHROPOL JI Am. Anthropol. PD DEC PY 1993 VL 95 IS 4 BP 1030 EP 1030 DI 10.1525/aa.1993.95.4.02a00370 PG 1 WC Anthropology SC Anthropology GA MN386 UT WOS:A1993MN38600036 ER PT J AU RASMUSSEN, HN WHIGHAM, DF AF RASMUSSEN, HN WHIGHAM, DF TI SEED ECOLOGY OF DUST SEEDS IN-SITU - A NEW STUDY TECHNIQUE AND ITS APPLICATION IN TERRESTRIAL ORCHIDS SO AMERICAN JOURNAL OF BOTANY LA English DT Article ID MYCORRHIZA AB A method is described by which seeds of terrestrial orchids are sown and retrieved in the field under almost natural conditions. For the first time it is possible to conduct a quantitative study of orchid germination in situ and observe seasonal growth and mortality of seedlings. The technique has also enabled us to investigate the relation between the site where the seeds are sown, the availability of an appropriate fungus to infect the seeds, and seedling establishment in the soil. Five local species were studied. Corallorhiza odontorhiza, Goodyera pubescens, and Galearis spectabilis all began to germinate in May-June, after 23-30 weeks in the soil. These species differed in their dependency on infection at germination time, but none of the seedlings developed beyond the point of rupturing the testa except when infected. Seeds of Liparis lilifolia and Tipularia discolor did not germinate within the first 12 months of the experiment. The implications and potential uses of this field sowing technique for further studies and for other kinds of minute seeds are discussed. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RI Rasmussen, Hanne/P-5485-2014; OI Rasmussen, Hanne/0000-0002-0181-9304; Whigham, Dennis/0000-0003-1488-820X NR 25 TC 123 Z9 135 U1 3 U2 43 PU BOTANICAL SOC AMER INC PI COLUMBUS PA OHIO STATE UNIV-DEPT BOTANY 1735 NEIL AVE, COLUMBUS, OH 43210 SN 0002-9122 J9 AM J BOT JI Am. J. Bot. PD DEC PY 1993 VL 80 IS 12 BP 1374 EP 1378 DI 10.2307/2445665 PG 5 WC Plant Sciences SC Plant Sciences GA MP331 UT WOS:A1993MP33100002 ER PT J AU LITTLETON, J FROHLICH, B AF LITTLETON, J FROHLICH, B TI FISH-EATERS AND FARMERS - DENTAL PATHOLOGY IN THE ARABIAN GULF SO AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY LA English DT Article DE DENTITION; PREHISTORIC ARABIA; BAHRAIN; PALEOPATHOLOGY; DIET; DENTAL DISEASE ID SKELETAL REMAINS; POINT-HOPE; TOOTH WEAR; OMAN; POPULATION; DISEASE; CARIES; ALASKA; QURUM AB Twelve skeletal samples, previously published, from the Arabian Gulf have been used to trace differences in diet and subsistence patterns through an analysis of dental pathology. The skeletons date from 3,000 BC to AD 1,500 and cover a variety of geographical locations: off-shore islands, Eastern Arabia, and Oman. The dental conditions analyzed are attrition, caries, calculus, abscessing, and antemortem tooth loss (AMTL). Results indicate four basic patterns of dental disease which, while not mutually exclusive, correspond to four basic subsistence patterns. Marine dependency represented by the Ras el-Hamra population, is indicated by severe attrition, low caries rates, wear-caused abscessing, and a lack of AMTL. The second group of dental diseases-moderate attrition and calculus, low rates of caries, wear-caused abscessing, and low-moderate rates of AMTL-affects populations subsisting on a mixture of pastoralism or fishing and agriculture (Failaka, Umm an-Nar, Bronze Age Maysar, Bronze Age Shimal, and Iron Age Galilah). Mixed farming populations (Iron Age Maysar and Islamic Bahrain) experienced low-moderate attrition, high rates of caries and calculus, abscessing due to caries, and severe AMTL. The final group of dental diseases affects populations practicing intensive gardening (Bronze and Iron Age Bahrain, and Sites 3 and 5, Ras al-Khaimah). These groups experienced slight attrition, high rates of caries, low rates of calculus deposition, and severe AMTL. (C) 1993 Wiley-Liss, Inc. C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT ANTHROPOL,WASHINGTON,DC 20560. RP LITTLETON, J (reprint author), AUSTRALIAN NAT UNIV,THE FACULTIES,CANBERRA,ACT 2600,AUSTRALIA. NR 42 TC 74 Z9 76 U1 2 U2 6 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0002-9483 J9 AM J PHYS ANTHROPOL JI Am. J. Phys. Anthropol. PD DEC PY 1993 VL 92 IS 4 BP 427 EP 447 DI 10.1002/ajpa.1330920403 PG 21 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA MM187 UT WOS:A1993MM18700002 PM 8296873 ER PT J AU ROMMEL, SA PABST, DA MCLELLAN, WA AF ROMMEL, SA PABST, DA MCLELLAN, WA TI FUNCTIONAL-MORPHOLOGY OF THE VASCULAR PLEXUSES ASSOCIATED WITH THE CETACEAN UTERUS SO ANATOMICAL RECORD LA English DT Article DE CETACEAN; THERMOREGULATION; COUNTERCURRENT HEAT EXCHANGE; UTERUS; FETAL DEVELOPMENT; REPRODUCTIVE SYSTEM; VASCULAR PLEXUS ID REGIONAL BLOOD-FLOW; PREGNANT SHEEP; EXERCISE RESPONSES; HEAT-PRODUCTION; MARINE MAMMALS; WEDDELL SEAL; FETAL; STRESS; HYPERTHERMIA; TEMPERATURE AB The cetacean reproductive system is surrounded by thermogenic locomotory muscle and insulating blubber. This arrangement suggests elevated temperatures at the uterus that could induce detrimental effects on fetal development, We present anatomical evidence for a complex countercurrent heat exchange system that could function to regulate the thermal environment of the uterus and a developing fetus. Cooled venous blood from the surfaces of the dorsal fin and flukes enters the abdominal cavity via the lumbo-caudal venous plexus. This plexus is juxtaposed to the arterial and venous plexuses associated with the uterus. The morphology of the lumbo-caudal venous plexus suggests that it acts as a ''heat sink'' for the adjacent tissues. Heat may be transferred to the cool, lumbo-caudal venous plexus from the warm blood in the arterial and venous plexuses supplying the uterus. Heat may also be transferred from adjacent locomotory muscles to the cool lumbo-caudal venous plexus. The countercurrent heat exchanger created by the juxtaposition of the lumbo-caudal venous plexus with the uterovarian arterial plexus is similar in design to that of the countercurrent heat exchanger described for male cetaceans. The functional implications of introducing cool superficial blood into the abdominal cavity of a diving, and locomoting female cetacean are discussed. (C) 1993 Wiley-Liss, Inc. C1 JAMES MADISON UNIV,DEPT BIOL,HARRISONBURG,VA 22807. SMITHSONIAN INST,NATL MUSEUM NAT HIST,WASHINGTON,DC. NR 70 TC 21 Z9 23 U1 5 U2 17 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0003-276X J9 ANAT REC JI Anat. Rec. PD DEC PY 1993 VL 237 IS 4 BP 538 EP 546 DI 10.1002/ar.1092370414 PG 9 WC Anatomy & Morphology SC Anatomy & Morphology GA MH570 UT WOS:A1993MH57000013 PM 8311267 ER PT J AU COURTNEY, GW AF COURTNEY, GW TI ARCHAIC BLACK FLIES AND ANCIENT FORESTS - CONSERVATION OF PARASIMULIUM HABITATS IN THE PACIFIC-NORTHWEST SO AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS LA English DT Article AB 1. Parasimulium (Diptera: Simuliidae) is one of the most distinctive, enigmatic and poorly collected groups of black flies in North America. The genus is confined to streams in the mesic coniferous forests of the Pacific Northwest, from southern British Columbia to northern California. 2. The immature stages of these unusual flies are specialized for life in the hyporheic zone, a region of flowing water beneath and lateral to the stream bed. Parasimulium shares this habitat with a diverse assemblage of subterranean aquatic invertebrates. 3. Most Parasimulium research has been conducted in the Cascade Range of Oregon, particularly streams in the Columbia River Gorge. Collection records suggest a correlation between the distribution of some species of Parasimulium and that of ancient forests in the Pacific Northwest. However, definitive evidence that Parasimulium is an ecologically sensitive 'indicator' species awaits additional observations on the group's distribution and habitat requirements. 4. This paper discusses the potential role of aquatic invertebrates in studies of ancient forests, and concludes that it may be especially great for hyporheic species, which typically inhabit zones of marked environmental stability. Data on these and other ecologically sensitive taxa will provide valuable insights into the management and conservation of surface and groundwater habitats of the Pacific Northwest. RP COURTNEY, GW (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,NHB 169,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1052-7613 J9 AQUAT CONSERV JI Aquat. Conserv.-Mar. Freshw. Ecosyst. PD DEC PY 1993 VL 3 IS 4 BP 361 EP 373 DI 10.1002/aqc.3270030410 PG 13 WC Environmental Sciences; Marine & Freshwater Biology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA MR088 UT WOS:A1993MR08800009 ER PT J AU ZILCZER, J AF ZILCZER, J TI DECODING COVERT,JOHN 'TIME', 1919 SO ART BULLETIN LA English DT Article RP ZILCZER, J (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 31 TC 1 Z9 1 U1 0 U2 0 PU COLLEGE ART ASSOC PI NEW YORK PA 275 SEVENTH AVE, NEW YORK, NY 10001 SN 0004-3079 J9 ART BULL JI Art Bull. PD DEC PY 1993 VL 75 IS 4 BP 713 EP 722 DI 10.2307/3045991 PG 10 WC Art SC Art GA MP323 UT WOS:A1993MP32300009 ER PT J AU BARNES, PJ AF BARNES, PJ TI A SEARCH FOR CO EMISSION FROM THE PLUTO CHARON SYSTEM SO ASTRONOMICAL JOURNAL LA English DT Article ID ATMOSPHERE; SATELLITE; METHANE AB Recent observations and theoretical models have indicated the presence of a thin but extended atmosphere around Pluto. Various models predict that, besides the generally accepted methane, the atmosphere may contain significant quantities of a heavier component, with nitrogen and/or carbon monoxide being the most likely candidates. I report here a search for CO emission from such an atmospheric component in the Pluto-Charon system. A simple model is also presented that predicts the CO visibility in a distended atmosphere around Pluto. RP BARNES, PJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS 42,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 15 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 1993 VL 106 IS 6 BP 2540 EP 2543 DI 10.1086/116823 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MK862 UT WOS:A1993MK86200031 ER PT J AU PRESS, WH RYBICKI, GB AF PRESS, WH RYBICKI, GB TI PROPERTIES OF HIGH-REDSHIFT LYMAN-ALPHA CLOUDS .2. STATISTICAL PROPERTIES OF THE CLOUDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; INTERGALACTIC MEDIUM; QUASARS, ABSORPTION LINES ID ABSORBING CLOUDS; RESOLUTION; SPECTRA; QUASARS; FOREST AB Curve-of-growth analysis, applied to the Lyman series absorption ratios deduced in our previous paper, yields a measurement of the logarithmic slope of distribution of Lyman-alpha clouds in column density N. The observed exponential distribution of the clouds' equivalent widths W is then shown to require a broad distribution of velocity parameters b, extending up to 80 km s-1. We show how the exponential itself emerges in a natural way. An absolute normalization for the differential distribution of cloud numbers in z, N, and b is obtained. By detailed analysis of absorption fluctuations along the line of sight (including correlations among neighboring spectral frequency bins) we are able to put upper limits on the cloud-cloud correlation function xi on several megaparsec length scales. We show that observed b values, if thermal, are incompatible, in several different ways, with the hypothesis of equilibrium heating and ionization by a background UV flux. Either a significant component of b is due to bulk motion (which we argue against on several grounds), or else the clouds are out of equilibrium, and hotter than is implied by their ionization state, a situation which could be indicative of recent adiabatic collapse. RP PRESS, WH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 30 TC 70 Z9 71 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1993 VL 418 IS 2 BP 585 EP 600 DI 10.1086/173419 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MJ035 UT WOS:A1993MJ03500005 ER PT J AU PELETIER, RF WILLNER, SP AF PELETIER, RF WILLNER, SP TI THE INFRARED TULLY-FISHER RELATION IN THE URSA MAJOR CLUSTER SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERS, INDIVIDUAL (URSA MAJOR); GALAXIES, PHOTOMETRY; INFRARED, GALAXIES ID VELOCITY-WIDTH RELATION; EXTRAGALACTIC DISTANCE SCALE; POPULATION INCOMPLETENESS BIAS; H-I-OBSERVATIONS; SPIRAL GALAXIES; B-BAND; SURFACE PHOTOMETRY; MALMQUIST BIAS; VIRGO CLUSTER; NEARBY GROUPS AB We present new magnitudes derived from 1.65 mum images for 23 galaxies in the Ursa Major cluster. Magnitudes now exist for all but one spiral meeting our criteria for cluster membership and having H I velocity width greater than 187 km s-1 and inclination greater than 45-degrees. These spirals fit a Tully-Fisher relation with dispersion in intrinsic magnitudes (after known observational uncertainties and the effect of cluster depth are removed) of 0.36 and a slope of 10.2 +/- 0.6. The magnitude dispersion is smaller than found in the Virgo cluster but still significantly larger than claimed by some authors. We find a hint that the Tully-Fisher relation may turn over at the bright end. Adding the central surface brightness of the disk as a third parameter flattens the slope of the Tully-Fisher relation and may give a distance estimate with slightly less dispersion, but the significance of the decrease must be tested on an independent sample. C1 EUROPEAN SO OBSERV,GARCHING,GERMANY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP PELETIER, RF (reprint author), KAPTEYN LAB,POSTBUS 800,9700 AV GRONINGEN,NETHERLANDS. RI Peletier, Reynier/B-9633-2012 NR 44 TC 32 Z9 32 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1993 VL 418 IS 2 BP 626 EP 637 DI 10.1086/173422 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MJ035 UT WOS:A1993MJ03500008 ER PT J AU DAME, TM KOPER, E ISRAEL, FP THADDEUS, P AF DAME, TM KOPER, E ISRAEL, FP THADDEUS, P TI A COMPLETE CO SURVEY OF M31 .1. DISTRIBUTION AND KINEMATICS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ISM; GALAXIES, INDIVIDUAL (M31); GALAXIES, STRUCTURE; ISM, MOLECULES ID MOLECULAR CLOUDS; CARBON-MONOXIDE; RADIAL-DISTRIBUTION; INFRARED-EMISSION; MILKY-WAY; HYDROGEN; REGION; GALAXY AB The 1.2 m millimeter-wave telescope at the Center for Astrophysics has been used to carry out the first complete CO survey of M31. At 115 GHz, the frequency of the J = 1 --> 0 transition observed, the telescope has a beamwidth of 8.7', corresponding to 1.7 kpc at the distance of M31. A total of 8 hr per day during two 6 month observing periods were devoted to the survey, which covers a 153' x 45' area of the disk with half-beamwidth (4.5') spacing. An average integration time of 100 minutes per point yielded an rms noise of 18 mK in each 1.3 km s-1 wide channel of our spectrometer. The entire galaxy has been observed out to a radius of at least 15 kpc-well beyond the optical disk and H I ring. Like other Population I in M31, the bulk of the CO emission in M31 is confined to a broad ring with a radius of approximately 10 kpc. Secondary enhancements in CO near R = 4.5 kpc and 14 kpc, similar to that in other Population I and probably the result of spiral arms, were also detected. The fraction of gas in molecular form drops sharply beyond 10 kpc, but is constant or rising within. Near the tangent of Arp's inner spiral arm N3 at R = 4.5 kpc, the H-2/H I surface density ratio is roughly 3 times the mean in the 10 kpc ring. If the Galactic value for the ratio of H-2 mass to CO intensity is adopted, the molecular mass surface density at the peak of the 10 kpc ring is approximately 1.3 M. pc-2, about the same as that in the Milky Way at the same radius, but only one-fifth that at the peak of the Milky Way's molecular ring at 4.5 kpc. Even at the brightest CO positions, the fraction of gas in molecular form appears no larger than one-third. The total H-2 mass of M31 is found to be 2.7 x 10(8) M., more than a factor of 10 less than that of H I, and about one-fourth the molecular mass of the Milky Way computed in the same way. C1 LEIDEN OBSERV, 2300 RA LEIDEN, NETHERLANDS. RP DAME, TM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 50 TC 65 Z9 66 U1 0 U2 0 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 DEC 1 PY 1993 VL 418 IS 2 BP 730 EP 742 DI 10.1086/173430 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MJ035 UT WOS:A1993MJ03500016 ER PT J AU GORDON, SM KIRSHNER, RP DURIC, N LONG, KS AF GORDON, SM KIRSHNER, RP DURIC, N LONG, KS TI THE DISCOVERY OF A SUPERNOVA REMNANT EMBEDDED IN A GIANT H-II REGION SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (M33); H II REGIONS; RADIO CONTINUUM, INTERSTELLAR; SUPERNOVA REMNANTS; X-RAYS, INTERSTELLAR ID LARGE MAGELLANIC CLOUD; SOFT-X-RAY; CYGNUS LOOP; NOVA REMNANTS; SHOCK-WAVES; M33; SPECTROPHOTOMETRY; RESOLUTION AB We have combined radio, optical, and X-ray data to discover a new supernova remnant (SNR) in M33. This remnant is embedded in the giant H II region NGC 592. Our VLA-WSRT radio survey of M33 showed that NGC 592 has a nonthermal component to its radio emission. Optical images of the H II region at the KPNO 4 m allowed us to subtract the thermal source to reveal the nonthermal source. NGC 592 had also been identified in Einstein data as a soft X-ray source. Our ROSAT observation, combined with the radio and optical data, provides evidence that the X-ray source is a supernova remnant. A knot of [S II] emission was isolated in the H II region, and MMT spectra confirm that the knot has the spectrum of a supernova remnant. We use these observations to investigate the properties of the remnant and its environment. We find that this SNR is a typical middle-aged remnant except that it is expanding into dense gas of the H II region NGC 592. We also find that there is a pressure difference between the hot postshock region and the cool recombination zone. This difference may be a sign that nonthermal particles and magnetic fields provide significant pressure support.in the recombination zone. C1 UNIV NEW MEXICO,INST ASTROPHYS,ALBUQUERQUE,NM 87131. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. RP GORDON, SM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,MS 10,CAMBRIDGE,MA 02138, USA. NR 41 TC 21 Z9 21 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1993 VL 418 IS 2 BP 743 EP 748 DI 10.1086/173431 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MJ035 UT WOS:A1993MJ03500017 ER PT J AU FORMAN, W JONES, C DAVID, L FRANX, M MAKISHIMA, K OHASHI, T AF FORMAN, W JONES, C DAVID, L FRANX, M MAKISHIMA, K OHASHI, T TI THE HEAVY ELEMENT ABUNDANCE IN THE HOT CORONA OF THE BRIGHT ELLIPTIC GALAXY NGC 4472 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ABUNDANCES; GALAXIES, INDIVIDUAL (NGC 4472); GALAXIES, ISM; X-RAYS, GALAXIES ID X-RAY; VIRGO CLUSTER; COOLING FLOWS; EVOLUTION; NGC-4472 AB From a 25 ks ROSAT PSPC observation of the elliptical galaxy NGC 4472, we measured the iron abundance with arcminute spatial resolution to a radial distance of 16' (74 kpc) in the hot corona. The heavy element abundance is roughly constant at approximately 1-2 [Fe/H]. from 4' to 16'. A comparison of these measurements to models of the heavy element enrichment of hot galactic coronae around elliptical galaxies provides new insights and constraints for the evolution with time of the Type la supernova rate and for its present epoch value. In particular, the near-solar value of the iron abundance and its constancy throughout the corona suggest a relatively constant supernova rate over time with a present epoch value at the low end of the range derived by van den Bergh & Tammann. C1 UNIV GRONINGEN,KAPTEYN ASTRON INST,9700 AV GRONINGEN,NETHERLANDS. UNIV TOKYO,BUNKYO KU,TOKYO 113,JAPAN. TOKYO METROPOLITAN UNIV,HACHIOJI,TOKYO 19203,JAPAN. RP FORMAN, W (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Forman, William/0000-0002-9478-1682 NR 36 TC 43 Z9 43 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1993 VL 418 IS 2 BP L55 EP L58 DI 10.1086/187115 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MJ036 UT WOS:A1993MJ03600001 ER PT J AU GROSSMAN, SA NARAYAN, R AF GROSSMAN, SA NARAYAN, R TI A THEORY OF NONLOCAL MIXING-LENGTH CONVECTION .2. GENERALIZED SMOOTHED PARTICLE HYDRODYNAMICS SIMULATIONS SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE CONVECTION; HYDRODYNAMICS; STARS, INTERIORS ID TURBULENT COMPRESSIBLE CONVECTION; MASSIVE STARS; EVOLUTIONARY MODELS; STELLAR INTERIORS; DEEP ATMOSPHERE; TESTS; CORES; CLUSTERS; LAYERS; ZONE AB We simulate nonlocal mixing-length convection using a generalized smoothed particle hydrodynamics (GSPH) computer code developed especially for this problem. GSPH is a numerical representation of the Boltzmann transport picture of turbulent fluids which we developed in the first paper in this series, with each particle representing a fluid blob of some characteristic size of order the mixing length. The particle dynamics are governed by the same equations as in the earlier paper, and therefore the code simulates the same physical processes as in the earlier analytical work. The properties of the mean fluid at each point are defined by the mean of the local ensemble of particles, while the dynamics of individual particles is determined by these mean properties and by forces which arise because of velocity and temperature deviations of a fluid blob relative to the local background. The deviation forces of buoyancy, turbulent viscosity, and turbulent diffusion, which are essential for the simulation of convection, are included. The simulations described here have a twofold purpose, the first of which is to provide insight into the physics of nonlocal convection, especially in the context of convective overshooting. The second purpose is to aid in the search for physically realistic closure relations for various higher order moments of the distribution function. We present the results of two simulations of ''homogeneous'' convection in which the fluid is convective throughout. The two simulations correspond to the parameter regimes of efficient and inefficient convection. In addition, we also describe the results of two convective overshooting simulations, where the unstable parts of the fluid again correspond to the two parameter regimes. We examine the distribution functions and their second, third, and fourth moments in each simulation and identify certain apparently generic features. In the overshooting simulations, the convective flux remains positive beyond the stability transition but changes sign somewhere inside the stable zone. At this point, the moments which are odd in the temperature fluctuation theta go to zero, and the even moments have minima. The velocity dispersion declines gradually beyond the stability transition in both over-shooting simulations and suggests an overshooting distance d(over) almost-equal-to 1-2l(M), where l(M) is the mixing length. However, this scaling is not likely to be universal, but probably depends on the parameters of convection. The temperature dispersion, and therefore also the convective flux, decline much more rapidly than the velocity fluctuations, and so nonlocal effects are apparently less important for the prediction of the temperature gradient. We study a variety of closure relations that may be used to close the moment equations at either the third or fourth moments and investigate their ability to reproduce qualitatively and quantitatively the nonlocal features of the GSPH data. We find that the parameters of the third-moment closure models must be tailored to fit each simulation, while the fourth-moment closure models are less variable. We therefore conclude that it is preferable to close the equations at the level of the fourth moments. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 50 TC 14 Z9 14 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD DEC PY 1993 VL 89 IS 2 BP 361 EP 394 DI 10.1086/191853 PG 34 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MG688 UT WOS:A1993MG68800007 ER PT J AU SASSELOV, DD AF SASSELOV, DD TI HYDRODYNAMICS AND MULTILEVEL NON-LTE RADIATIVE-TRANSFER IN PULSATING ATMOSPHERES - CEPHEIDS SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article RP SASSELOV, DD (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD DEC PY 1993 VL 210 IS 1-2 BP 329 EP 330 DI 10.1007/BF00657918 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA NB574 UT WOS:A1993NB57400052 ER PT J AU OLMEZ, I FIREMAN, EL LANGWAY, CC AF OLMEZ, I FIREMAN, EL LANGWAY, CC TI TRACE-ELEMENTS IN BASAL ICE AT DYE-3 SO ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS LA English DT Article DE ICE CORES; BASAL ICE; TRACE METALS; NEUTRON ACTIVATION ANALYSIS ID CLIMATIC RECORD; ANTARCTIC ICE; GREENLAND; CORE AB A suite of 14 individual debris and silt-laden samples were selected from the bottom 30 m increment of 2035 m deep Dye-3 Greenland ice core. Concentrations of trace elements in these samples were measured by instrumental neutron activation analysis (INAA). The results show characteristic elemental patterns for the embedded particles and debris from two different sources. The upper samples contain trace element marker species identifying atmospherically transported material; the lower samples contain marker species identifying particles originating from continental crustal lithologies from two different sub-ice source areas. This study supports the theory that bedrock scouring is the origin of particles in the bottom 23.6 m of the Dye-3 core, and atmospheric transport and deposition is the origin of the particles above this depth; some particles may be of volcanic origin. C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02138. SUNY BUFFALO,DEPT GEOL SCI,AMHERST,NY 14226. RP OLMEZ, I (reprint author), MIT,NUCL REACTOR LAB,138 ALBANY ST,CAMBRIDGE,MA 02139, USA. NR 29 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0004-6981 J9 ATMOS ENVIRON A-GEN PD DEC PY 1993 VL 27 IS 17-18 BP 2921 EP 2926 DI 10.1016/0960-1686(93)90324-R PG 6 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA MP871 UT WOS:A1993MP87100023 ER PT J AU ERWIN, DH AF ERWIN, DH TI THE ORIGIN OF METAZOAN DEVELOPMENT - A PALEOBIOLOGICAL PERSPECTIVE SO BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY LA English DT Article DE ORIGIN OF ANIMALS; EVOLUTION; KEY INNOVATIONS; METAZOA ID GENE-EXPRESSION; PHYLOGENETIC-RELATIONSHIPS; EVOLUTION; DROSOPHILA; PATTERNS; RNA; ANTENNAPEDIA; EUKARYOTES; SEQUENCES RP ERWIN, DH (reprint author), SMITHSONIAN INST,DEPT PALEOBIOL,NHB-121,WASHINGTON,DC 20560, USA. RI Erwin, Douglas/A-9668-2009 NR 83 TC 37 Z9 38 U1 1 U2 6 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0024-4066 J9 BIOL J LINN SOC JI Biol. J. Linnean Soc. PD DEC PY 1993 VL 50 IS 4 BP 255 EP 274 DI 10.1111/j.1095-8312.1993.tb00931.x PG 20 WC Evolutionary Biology SC Evolutionary Biology GA MY737 UT WOS:A1993MY73700001 ER PT J AU WEMMER, C RUDRAN, R DALLMEIER, F WILSON, DE AF WEMMER, C RUDRAN, R DALLMEIER, F WILSON, DE TI TRAINING DEVELOPING-COUNTRY NATIONALS IS THE CRITICAL INGREDIENT TO CONSERVING GLOBAL BIODIVERSITY SO BIOSCIENCE LA English DT Article ID ZOO C1 SMITHSONIAN INST,INT CTR,BIOSPHERE BIOL DIVERS PROGRAM,WASHINGTON,DC 20560. RP WEMMER, C (reprint author), NATL ZOOL PK,CONSERVAT & RES CTR,FRONT ROYAL,VA 22630, USA. NR 19 TC 10 Z9 12 U1 0 U2 3 PU AMER INST BIOLOGICAL SCI PI WASHINGTON PA 1444 EYE ST, NW, STE 200, WASHINGTON, DC 20005 SN 0006-3568 J9 BIOSCIENCE JI Bioscience PD DEC PY 1993 VL 43 IS 11 BP 762 EP 767 DI 10.2307/1312320 PG 6 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MH348 UT WOS:A1993MH34800007 ER PT J AU MEULEN, JV AF MEULEN, JV TI THE WINGS OF DEMOCRACY, THE INFLUENCE OF AIR POWER ON THE ROOSEVELT ADMINISTRATION, 1933-1941 - UNDERWOOD,JS SO CANADIAN REVIEW OF AMERICAN STUDIES LA English DT Book Review RP MEULEN, JV (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU CANADIAN REVIEW AMER STUDIES PI CALGARY PA C/O UNIV CALGARY PRESS, UNIV CALGARY 2500 UNIVERSITY DR NW, CALGARY AB T2N 1N4, CANADA SN 0007-7720 J9 CAN REV AM STUD JI Can. Rev. Am. Stud. PD WIN PY 1993 VL 23 IS 2 BP 238 EP 240 PG 3 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA KY286 UT WOS:A1993KY28600032 ER PT J AU PAKALUK, J SLIPINSKI, SA AF PAKALUK, J SLIPINSKI, SA TI A NEW GENUS AND 2 NEW SPECIES OF NEOTROPICAL RHIZOPHAGIDAE (COLEOPTERA) FROM TRIGONA (HYMENOPTERA, APIDAE) NESTS, WITH A REVIEW OF RHIZOPHAGID BIOLOGY SO COLEOPTERISTS BULLETIN LA English DT Article AB A new genus of neotropical Rhizophagidae, Crowsonius, contains two new species, Crowsonius meliponae and C. similis, known from Costa Rica and Brazil respectively. Both species have been collected from Trigona nests. These beetles are wingless with extremely reduced eyes suggesting they are true melittophiles rather than accidental associates. The genus and its species are described and useful taxonomic structures are illustrated. A review of the biology of Rhizophagidae is included. C1 POLISH ACAD SCI,INST ZOOL,PL-00679 WARSAW,POLAND. RP PAKALUK, J (reprint author), NATL MUSEUM NAT HIST,SMITHSONIAN INST,USDA,SYSTEMAT ENTOMOL LAB,NHB 168,WASHINGTON,DC 20560, USA. RI Slipinski, Stanislaw Adam/B-4293-2009 NR 0 TC 2 Z9 3 U1 0 U2 1 PU COLEOPTERISTS SOC PI NATCHEZ PA P.O. BOX 767, NATCHEZ, MS 39121 SN 0010-065X J9 COLEOPTS BULL JI Coleopt. Bull. PD DEC PY 1993 VL 47 IS 4 BP 349 EP 358 PG 10 WC Entomology SC Entomology GA MK904 UT WOS:A1993MK90400004 ER PT J AU BALIUNAS, S JASTROW, R AF BALIUNAS, S JASTROW, R TI EVIDENCE ON THE CLIMATE IMPACT OF SOLAR VARIATIONS SO ENERGY LA English DT Article; Proceedings Paper CT 1992 EPRI/SIO Symposium on Global Warming CY SEP, 1992 CL LA JOLLA, CA SP ELECT POWER RES INST, SCRIPPS INST OCEANOG ID SURFACE AIR-TEMPERATURE; II K-LINE; BRIGHTNESS CHANGES; MAUNDER MINIMUM; STARS; CYCLE; LUMINOSITY; IRRADIANCE; EMISSION AB Friis-Christensen and Lassen report a close correspondence in the last 100 years between average Northern Hemisphere temperatures and changes in the length of the solar magnetic cycle. Observations of the sun and a number of solar-type stars suggest the explanation for this correlation. They reveal that (a) changes in the length of the magnetic activity cycle are correlated with changes in the amplitude of surface magnetic activity; (b) the amplitude changes in turn are positively correlated with changes in the sun's brightness. These relationships connect changes in the length of the solar cycle with solar irradiance changes. They supply a physical mechanism for the connection between terrestrial temperatures and the length of the solar cycle reported by Friis-Christensen and Lassen. Application of the same results to the history of solar surface magnetic activity since the Maunder Minimum yields the result that the change in solar irradiance from 1700 to the present could have been as small as 0.1% or as large as 0.7%. The mid-point of that range, a change in solar irradiance of 0.4%, is sufficient to explain all or most of the recovery from the Little Ice Age of the 17th Century and most of the half-degree global warming observed during the last 100 years. Satellite observations of solar irradiance over the 1978-1989 period have revealed a climatically insignificant brightness change of 0.1% over that period. Other stars similar to the sun display climatically significant changes of up to 0.6%, suggesting that at other times or over longer periods of time the sun may also change by larger amounts than were observed from 1978-1989. C1 TENNESSEE STATE UNIV,CTR EXCELLENCE INFORMAT SYST,NASHVILLE,TN 37203. MT WILSON INST,PASADENA,CA. RP BALIUNAS, S (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 35 TC 7 Z9 8 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD DEC PY 1993 VL 18 IS 12 BP 1285 EP 1295 DI 10.1016/0360-5442(93)90016-7 PG 11 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA MP998 UT WOS:A1993MP99800008 ER PT J AU WASHBURN, WE AF WASHBURN, WE TI THE AMERICAN-INDIAN IN THE CIVIL-WAR, 1862-1865 - ABEL,AH SO ETHNOHISTORY LA English DT Book Review RP WASHBURN, WE (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU DUKE UNIV PRESS PI DURHAM PA BOX 90660, DURHAM, NC 27708-0660 SN 0014-1801 J9 ETHNOHISTORY JI Ethnohistory PD WIN PY 1993 VL 41 IS 1 BP 174 EP 175 DI 10.2307/3536986 PG 2 WC Anthropology; History SC Anthropology; History GA NB111 UT WOS:A1993NB11100010 ER PT J AU KRATZ, CA AF KRATZ, CA TI I COULD SPEAK UNTIL TOMORROW - ORIKI, WOMEN, AND THE PAST IN A YORBA TOWN - BARBER,K SO ETHNOHISTORY LA English DT Book Review RP KRATZ, CA (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU DUKE UNIV PRESS PI DURHAM PA BOX 90660, DURHAM, NC 27708-0660 SN 0014-1801 J9 ETHNOHISTORY JI Ethnohistory PD WIN PY 1993 VL 41 IS 1 BP 205 EP 207 DI 10.2307/3537002 PG 3 WC Anthropology; History SC Anthropology; History GA NB111 UT WOS:A1993NB11100028 ER PT J AU LESSIOS, HA CUNNINGHAM, CW AF LESSIOS, HA CUNNINGHAM, CW TI THE EVOLUTION OF GAMETIC INCOMPATIBILITY IN NEOTROPICAL ECHINOMETRA - REPLY SO EVOLUTION LA English DT Note DE GEMINATE SPECIES; ISTHMUS OF PANAMA; REPRODUCTIVE ISOLATION; SPECIATION ID URCHIN C1 UNIV TEXAS,DEPT ZOOL,AUSTIN,TX 78712. RP LESSIOS, HA (reprint author), SMITHSONIAN TROP RES INST,BOX 2072,BALBOA,PANAMA. RI Cunningham, Clifford/B-9807-2014; OI Cunningham, Clifford/0000-0002-5434-5122 NR 5 TC 2 Z9 2 U1 0 U2 0 PU SOC STUDY EVOLUTION PI LAWRENCE PA 810 E 10TH STREET, LAWRENCE, KS 66044 SN 0014-3820 J9 EVOLUTION JI Evolution PD DEC PY 1993 VL 47 IS 6 BP 1883 EP 1885 DI 10.2307/2410229 PG 3 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA NT236 UT WOS:A1993NT23600021 ER PT J AU CONDIT, R HUBBELL, SP FOSTER, RB AF CONDIT, R HUBBELL, SP FOSTER, RB TI MORTALITY AND GROWTH OF A COMMERCIAL HARDWOOD EL-CATIVO, PRIORIA-COPAIFERA, IN PANAMA SO FOREST ECOLOGY AND MANAGEMENT LA English DT Article ID SHORT-TERM DYNAMICS; NEOTROPICAL FOREST; RAIN-FOREST; TREE; RECRUITMENT AB The demography of a valuable timber tree, Prioria copaifera, was studied in undisturbed forest on Barro Colorado Island (BCI) in central Panama using data from a permanent, 50 ha census plot. All individuals above 10 mm diameter at breast height (dbh) in the plot were mapped and dbh measures taken in 1982,1985, and 1990. Although Prioria is mainly known from swamp forest, it was abundant in the upland forest of BCI, with a mean density of 27-29 stems ha-1 of 10 mm dbh or more. Mortality rates of Prioria were 0.5 and 0.6% year-1 during the two census intervals and did not depend on dbh. Mean growth of saplings was slow, less than 1 mm year-1, but larger trees grew rapidly, at 8-16 mm year-1. Growth rates of medium and large trees were higher during 1982-1985 than during 19851990, probably because a severe drought in 1983 increased forest-wide mortality rates and opened the forest canopy, allowing more light to penetrate the forest. During both census intervals, growth was extremely variable, ranging from 0 to 40 mm year-1 in different individuals. The range of variability changed little with size: across dbh values from 1 00 to 1 000 mm, maximum growth rates were 20-40 mm year-1. Unlike absolute growth rates, however, relative growth declined with size, from about 5% year-1 in saplings to 1% year-1 in large trees, and was much more variable among small stems than among larger. Information about variation in growth between individuals and between census periods will be important in forest management, as it indicates how and to what extent silvicultural treatment might enhance timber production in Prioria. In addition, rapid growth of some stems suggests that plantation forestry might be productive in Prioria. Our finding that population density and performance were good in upland soils suggests that plantations of this species could be attempted in drier soils than previously thought necessary. C1 PRINCETON UNIV,DEPT ECOL EVOLUT & BEHAV,PRINCETON,NJ 08544. FIELD MUSEUM NAT HIST,DEPT BOT,CHICAGO,IL 60605. RP CONDIT, R (reprint author), SMITHSONIAN TROP RES INST,LATIN AMER PROGRAM,POB 2072,BALBOA,PANAMA. NR 31 TC 54 Z9 57 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1127 J9 FOREST ECOL MANAG JI For. Ecol. Manage. PD DEC PY 1993 VL 62 IS 1-4 BP 107 EP 122 DI 10.1016/0378-1127(93)90045-O PG 16 WC Forestry SC Forestry GA MN652 UT WOS:A1993MN65200008 ER PT J AU CONDIT, R HUBBELL, SP FOSTER, RB AF CONDIT, R HUBBELL, SP FOSTER, RB TI IDENTIFYING FAST-GROWING NATIVE TREES FROM THE NEOTROPICS USING DATA FROM A LARGE, PERMANENT CENSUS PLOT SO FOREST ECOLOGY AND MANAGEMENT LA English DT Article ID SHORT-TERM DYNAMICS; RAIN-FOREST; RECRUITMENT; RECOVERY; GROWTH AB To screen for rapidly growing trees, lifetime growth histories of 160 species were estimated from data collected in a permanent 50 ha census plot in tropical moist forest in Panama, Most of the 160 species had never been studied before in detail, and newly encountered species with rapid growth might provide better techniques for reforesting degraded soils in Central America. To estimate life-time growth, polynomial regressions were fitted to instantaneous growth rates expressed as a function of log-transformed diameter at breast height (dbh). These functions represent a differential equation in dbh, and explicit solutions for the equations provided dbh trajectories as a function of age (starting at 1 cm dbh, which was the smallest size included in the census). Dbh trajectories were calculated for 160 species, and full growth data are presented for the 28 species that ranked among the fastest 15 to reach a dbh of 10, 30, or 60 cm. Dbh trajectories based on growth of one standard deviation above the mean were also estimated for these species by fitting a polynomial regression to the residuals around the original regression. The fastest-growing tree in the 50 ha plot was the balsa, Ochroma pyramidale, which reached 10 cm in 5 years and 30 cm in 10. Cavanillesia platanifolia, Trema micrantha, Zanthoxylum belizense, and Vochysia ferruginea were the other top-ranking species. At mean growth, the top 15 ranking species required 5-25 years to reach 10 cm, 10-67 years to reach 30 cm, and 32-111 years to reach 60 cm, starting at 1 cm. At growth one standard deviation above the mean, the same species required 4-18 years to reach 10 cm, 8-35 years to reach 30 cm, and 19-69 years to reach 60 cm dbh. We recommend that the little-known species from this list be further tested in reforestation trials. C1 PRINCETON UNIV,DEPT ECOL & EVOLUTIONARY BIOL,PRINCETON,NJ 08544. FIELD MUSEUM NAT HIST,DEPT BOT,CHICAGO,IL 60605. RP CONDIT, R (reprint author), SMITHSONIAN TROP RES INST,LATIN AMER PROGRAM,POB 2072,BALBOA,PANAMA. NR 40 TC 76 Z9 81 U1 3 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1127 J9 FOREST ECOL MANAG JI For. Ecol. Manage. PD DEC PY 1993 VL 62 IS 1-4 BP 123 EP 143 DI 10.1016/0378-1127(93)90046-P PG 21 WC Forestry SC Forestry GA MN652 UT WOS:A1993MN65200009 ER PT J AU WALSH, JM AF WALSH, JM TI QUIVIRA - EUROPEANS IN THE REGION OF THE SANTA-FE-TRAIL, 1540-1820 - BRANDON,W SO GREAT PLAINS QUARTERLY LA English DT Book Review RP WALSH, JM (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU CENT GREAT PLAINS STUD PI LINCOLN PA UNIV NEBRASKA-LINCOLN 1214 OLDFATHER HALL, LINCOLN, NE 68588-0313 SN 0275-7664 J9 GREAT PLAINS QUART JI Gt. Plains Q. PD WIN PY 1993 VL 13 IS 1 BP 60 EP 61 PG 2 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA KW201 UT WOS:A1993KW20100021 ER PT J AU LESSIOS, HA WEINBERG, JR AF LESSIOS, HA WEINBERG, JR TI MIGRATION, GENE FLOW AND REPRODUCTIVE ISOLATION BETWEEN AND WITHIN MORPHOTYPES OF THE ISOPOD EXCIROLANA IN 2 OCEANS SO HEREDITY LA English DT Article DE DIAGNOSTIC LOCI; DISPERSAL; F-ST STATISTICS; GEOGRAPHIC VARIATION; ISOZYMES; PRIVATE ALLELES ID NATURAL-POPULATIONS; DIVERGENCE; EXTINCTION; DIFFERENTIATION; RECOLONIZATION; PANAMA; CONSEQUENCES; VARIABILITY; VARIANCE; FREQUENT AB The rate of gene flow between populations depends both on the dispersal ability of the organism and on the probability that migrants can successfully mate with residents. The degree to which this reproductive isolation can impede genetic exchange can be assessed by studying both migration and gene flow. We carried out such a study in Panamanian populations of Excirolana, an intertidal isopod with no planktonic larvae that inhabits both coasts of Central and South America. In Panama Excirolana is represented by three morphs of E. braziliensis (two closely related and found on opposite sides of Central America, a third only in the eastern Pacific) and by E. chamensis. Because populations of Excirolana from each beach in Panama, regardless of species or morphotype affiliation, are characterized by a unique combination of alleles, this isopod provides the opportunity to use genetic data to determine the number of immigrants that land on a given beach as well as the number of individuals that transfer alleles between populations. We studied isozyme patterns of 10 populations of E. braziliensis and one population of E. chamensis. Rates of gene flow were estimated both from F-ST statistics and from private alleles. In contrast to the private allele method, F-ST statistics gave results that were internally consistent in that they produced lower estimates of apparent gene flow between oceans and recognized species than they did between populations of the same morph. Rate of gene flow between populations belonging to the two morphs of E. braziliensis in the eastern Pacific was as low as apparent gene flow across the Central American isthmus and no larger than the rate of genetic exchange between E. braziliensis and E. chamensis. One locality that contained both morphs in sufficiently large numbers showed heterozygote deficits relative to Hardy-Weinberg expectations. Reproductive isolation is, therefore, of sufficient strength to justify the conclusion that the two Pacific morphs of E. braziliensis should be assigned to different species. Gene flow rate between populations of the same morph was an order of magnitude larger than rate of gene exchange between morphs but still less than one propagule per generation. Rate of immigration into every beach, calculated from the number of homozygotes of rare alleles (in excess of what would be expected from random matings among the residents), was surprisingly high for an organism with apparently limited means of dispersal and with fixed genetic differences between adjacent populations. Individuals of E. braziliensis evidently move between beaches much more freely than alleles move between populations. Therefore, some degree of reproductive isolation exists even between genotypes that belong to the same morph. C1 NATL MARINE FISHERIES SERV,POPULAT DYNAM BRANCH,WOODS HOLE,MA 02543. RP LESSIOS, HA (reprint author), SMITHSONIAN TROP RES INST,BOX 2072,BALBOA,PANAMA. NR 57 TC 11 Z9 12 U1 0 U2 5 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0018-067X J9 HEREDITY JI Heredity PD DEC PY 1993 VL 71 BP 561 EP 573 DI 10.1038/hdy.1993.180 PN 6 PG 13 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA MM691 UT WOS:A1993MM69100002 ER PT J AU GADAGKAR, R ROUBIK, DW INOUE, T ASHTON, PS CHANDRASHEKARAN, MK AF GADAGKAR, R ROUBIK, DW INOUE, T ASHTON, PS CHANDRASHEKARAN, MK TI DIVERSITY AND FLEXIBILITY OF BIOTIC COMMUNITIES IN FLUCTUATING ENVIRONMENTS - PREFACE SO JOURNAL OF BIOSCIENCES LA English DT Editorial Material C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. KYOTO UNIV,CTR ECOL RES,DIV TROP ECOL,OTSU,SHIGA 52001,JAPAN. HARVARD UNIV,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INDIAN ACADEMY SCIENCES PI BANGALORE PA P B 8005 C V RAMAN AVENUE, BANGALORE 560 080, INDIA SN 0250-5991 J9 J BIOSCIENCE JI J. Biosci. PD DEC PY 1993 VL 18 IS 4 BP 423 EP 423 PG 1 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MY089 UT WOS:A1993MY08900001 ER PT J AU ROUBIK, DW AF ROUBIK, DW TI DIRECT COSTS OF FOREST REPRODUCTION, BEE-CYCLING AND THE EFFICIENCY OF POLLINATION MODES SO JOURNAL OF BIOSCIENCES LA English DT Article; Proceedings Paper CT International Geosphere-Biosphere Project (IGBP) Symposium CY DEC, 1991 CL KYOTO, JAPAN DE BEES; POLLINATORS; FOREST REPRODUCTION; PRIMARY PRODUCTION ID HYMENOPTERA; COMMUNITY; ORGANIZATION; INVESTMENT; EVOLUTION; DISPERSAL; SYSTEMS; ENERGY; COLONY; APIDAE AB The bee guild represents direct primary costs of angiosperm reproduction. Tropical flower visitors take an amount comparable to herbivores, exceeding 3% of net primary production energy. Therefore herbivory and aboveground net primary production have been underestimated. Comparing pollinators to other herbivores, harvest in mature forest by tropical bees is greater than leafcutter ants, game animals, frugivores, vertebrate folivores, insect defoliators excluding ants, flower-feeding birds and bats, but not soil organisms. The ratio of total aboveground net primary production to investment in pollen, nectar and resin used by pollinators suggests wind pollination is several times more efficient in temperate forests than is animal pollination in neotropical moist forest. Animal pollination may, be favour;ed by habitat mosaics and an unpredictable or sparse dispersion of conspecifics-consequences of fluctuating abiotic and biotic environments. Natural selection evidently favours diminished direct reproductive costs in forests, for example by wind pollination, regardless of latitude and disturbance regime. An example is ''wind pollination by proxy'' of dominant trees in seasonal southeast Asian forests. They flower only occasionally and their pollen is dispersed by tiny winged insects that are primarily carried by the wind-rather than the nectar-hungry bees, bats, birds and moths used by most tropical nora. Increasing evapotranspiration is associated with greater net primary production; I show its correlation with species richness of social tropical bees across the isthmus of Panama, which may indicate increasing forest reproductive effort devoted to flowering, and its monopolization by unspecialized newer visitors in wetter and less seasonal lowland forests, C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 62 TC 23 Z9 26 U1 0 U2 6 PU INDIAN ACADEMY SCIENCES PI BANGALORE PA P B 8005 C V RAMAN AVENUE, BANGALORE 560 080, INDIA SN 0250-5991 J9 J BIOSCIENCE JI J. Biosci. PD DEC PY 1993 VL 18 IS 4 BP 537 EP 552 DI 10.1007/BF02703085 PG 16 WC Biology SC Life Sciences & Biomedicine - Other Topics GA MY089 UT WOS:A1993MY08900009 ER PT J AU RAPPOLE, JH MCSHEA, WJ VEGARIVERA, J AF RAPPOLE, JH MCSHEA, WJ VEGARIVERA, J TI EVALUATION OF 2 SURVEY METHODS IN UPLAND AVIAN BREEDING COMMUNITIES SO JOURNAL OF FIELD ORNITHOLOGY LA English DT Article AB Ten sites in the Appalachian Oak Forest community of Northern Virginia were examined using mist nets and song counts, Each site was mist-netted once, and visited three times for song counts during June and early July 1991. Mist nets provided an assessment of the understory bird community that was similar to that of the song count in terms of overall species richness, but quite different with regard to species abundance; song counts generally underestimated numbers, occasionally by an order of magnitude. Song counts also failed to accurately predict understory species composition for seven of 10 sites surveyed. The use of song counts appears to be inappropriate for determination of detailed information on breeding population dynamics. A combination of mist nets and song counts, however, can be used to determine presence/absence, RP RAPPOLE, JH (reprint author), SMITHSONIAN INST,CONSERVAT & RES CTR,FRONT ROYAL,VA 22630, USA. NR 29 TC 15 Z9 17 U1 1 U2 5 PU ASSOC FIELD ORNITHOLOGISTS PI BELOIT PA BELOIT COLLEGE, DEPT BIOLOGY, 700 COLLEGE ST, BELOIT, WI 53511 SN 0273-8570 J9 J FIELD ORNITHOL JI J. Field Ornithol. PD WIN PY 1993 VL 64 IS 1 BP 55 EP 70 PG 16 WC Ornithology SC Zoology GA KR846 UT WOS:A1993KR84600008 ER PT J AU SWOFFORD, DL AF SWOFFORD, DL TI PAUP - A COMPUTER-PROGRAM FOR PHYLOGENETIC INFERENCE USING MAXIMUM PARSIMONY SO JOURNAL OF GENERAL PHYSIOLOGY LA English DT Meeting Abstract C1 SMITHSONIAN INST,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560. NR 0 TC 99 Z9 99 U1 5 U2 35 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0022-1295 J9 J GEN PHYSIOL JI J. Gen. Physiol. PD DEC PY 1993 VL 102 IS 6 BP A9 EP A9 PG 1 WC Physiology SC Physiology GA MN163 UT WOS:A1993MN16300032 ER PT J AU FAUST, MA BALECH, E AF FAUST, MA BALECH, E TI A FURTHER SEM STUDY OF MARINE BENTHIC DINOFLAGELLATES FROM A MANGROVE ISLAND, TWIN CAYS, BELIZE, INCLUDING PLAGIODINIUM-BELIZEANUM GEN ET SP-NOV SO JOURNAL OF PHYCOLOGY LA English DT Article DE BELIZE, CENTRAL AMERICA; BENTHIC DINOFLAGELLATE; DINOPHYCEAE; LIGHT MICROSCOPY; MANGROVE HABITAT; PLAGIODINIUM-BELIZEANUM GEN ET SP NOV; SCANNING ELECTRON MICROSCOPY; TAXONOMY AB This study indicates that bilaterally flattened, armored, benthic dinoflagellates are more diverse in morphology than previously known. A new species, Plagiodinium belizeanum Faust et Balech gen. et sp. nov., is described in floating detritus from Twin Cays, Belize, mangrove habitats. Plagiodinium belizeanum cells are small, with dimensions of 26.5-30.5 mum in length, 20-24.5 mum in width, and 6.5-8.5 mum in depth. Cells are oblong and bilaterally compressed with a posteriorly located, spherical nucleus, many chloroplasts, and spherical starch granules. The epitheca descends ventrally, is cap-shaped, and is composed of five plates and a very small platelet provisionally named P(o) situated in the center. The epitheca is narrowly oval in apical view with a pointed truncated ventral side and a rounded dorsal side. The cingulum is composed of five plates. The hypotheca is constructed of five posteriorly elongated postcingular plates and one antapical plate. The sulcus is very short and narrow, comprised of five small plates. The thecal plate arrangement of P. belizeanum is P(o), 5', O'', 5C, 5''', 1'''', 5C. No lists are present. Thecal plates have a smooth surface with small and irregularly scattered pores. The intercalary band is smooth on the outer cell surface and broadly striated on its inner surface. We conclude that P. belizeanum represents a new, benthic, peridinioid, armored genus, Plagiodinium gen. nov. The taxonomic position of P. belizeanum sp. nov. is compared to related sand-dwelling and bilaterally flattened benthic dinoflagellates. C1 ESTAC HIDROBIOL PUERTO QUEQUEN,RA-7630 NECOCHEA,ARGENTINA. RP FAUST, MA (reprint author), SMITHSONIAN INST,NAT MUSEUM NAT HIST,DEPT BOT,4201 SILVER HILL RD,SUITLAND,MD 20746, USA. NR 23 TC 22 Z9 23 U1 2 U2 3 PU PHYCOLOGICAL SOC AMER INC PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044 SN 0022-3646 J9 J PHYCOL JI J. Phycol. PD DEC PY 1993 VL 29 IS 6 BP 826 EP 832 DI 10.1111/j.0022-3646.1993.00826.x PG 7 WC Plant Sciences; Marine & Freshwater Biology SC Plant Sciences; Marine & Freshwater Biology GA MR550 UT WOS:A1993MR55000012 ER PT J AU BABB, JF SUN, Y JAMIESON, MJ DALGARNO, A ALLISON, AC AF BABB, JF SUN, Y JAMIESON, MJ DALGARNO, A ALLISON, AC TI CONTINUUM ABSORPTION OF VIBRATIONALLY EXCITED O2 FROM 200-320 NM SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID SCHUMANN-RUNGE BANDS; OXYGEN; STATES; PHOTODISSOCIATION; OZONE; PREDISSOCIATION; IRRADIATION; O-2 AB Cross sections for absorption from excited vibrational levels of the ground X3SIGMA(g)- state of molecular oxygen to the repulsive 1(3)PI(u) state are given. The potential energy curve for the 1(3)PI(u) state of O2 is constructed to be consistent with predissociation data for the B3SIGMA(u)- state and with recent ab initio calculations. In the photon wavelength range of 200-320 nm the cross sections are smoothly oscillatory and in no case larger than 1 x 10(-21) cm2. In the region of the Schumann-Runge bands the cross sections are of order 0.4 x 10(-21) cm2. C1 UNIV GLASGOW,DEPT COMP SCI,GLASGOW G12 8QQ,SCOTLAND. RP BABB, JF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Babb, James/0000-0002-3883-9501 NR 23 TC 5 Z9 5 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD DEC PY 1993 VL 50 IS 6 BP 579 EP 583 DI 10.1016/0022-4073(93)90024-C PG 5 WC Optics; Spectroscopy SC Optics; Spectroscopy GA MW489 UT WOS:A1993MW48900003 ER PT J AU ROBERTS, DR CHAN, O PECOR, J REJMANKOVA, E MANGUIN, S POLANCO, J LEGTERS, LJ AF ROBERTS, DR CHAN, O PECOR, J REJMANKOVA, E MANGUIN, S POLANCO, J LEGTERS, LJ TI PRELIMINARY-OBSERVATIONS ON THE CHANGING ROLES OF MALARIA VECTORS IN SOUTHERN BELIZE SO JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION LA English DT Note ID ANOPHELES-DARLINGI AB A survey for larval and adult Anopheles mosquitoes was conducted in Toledo District of southern Belize during August-September 1992. We surveyed for larvae in 145 habitats and conducted paired indoor-outdoor collections of adult mosquitoes landing on humans at 6 houses. In 1940-41, Kumm and Ram reported Anopheles darlingi females to be the most common Anopheles mosquitoes inside houses and reported no specimens of Anopheles vestitipennis in southern Belize. In our 1992 survey we found no An. darlingi mosquitoes either as adults or larvae. More An. vestitipennis females were captured indoors than outdoors, whereas most Anopheles albimanus and Anopheles apicimacula females were captured outdoors. All 3 species were represented occasionally in 145 collections of larvae from diverse habitats. Anopheles vestitipennis now appears to be a potentially important vector of malaria during the wet season in Toledo District. C1 MINIST HLTH,MALARIA CONTROL PROGRAM,BELIZE CITY,BELIZE. SMITHSONIAN INST,MSC,WALTER REED BIOSYSTEMAT UNIT,SUITLAND,MD 20746. UNIV CALIF DAVIS,DIV ENVIRONM STUDIES,DAVIS,CA 95616. RP ROBERTS, DR (reprint author), USUHS,DEPT PREVENT MED BIOMETR,4301 JONES BRIDGE RD,BETHESDA,MD 20814, USA. RI Manguin, Sylvie/G-1787-2015 OI Manguin, Sylvie/0000-0002-5925-7164 NR 10 TC 18 Z9 18 U1 0 U2 0 PU AMER MOSQUITO CONTROL ASSN INC PI LAKE CHARLES PA 707-A EAST PRIEN LAKE ROAD, PO BOX 5416, LAKE CHARLES, LA 70606-5416 SN 8756-971X J9 J AM MOSQUITO CONTR JI J. Am. Mosq. Control Assoc. PD DEC PY 1993 VL 9 IS 4 BP 456 EP 459 PG 4 WC Entomology SC Entomology GA MV752 UT WOS:A1993MV75200014 PM 8126482 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI THE PERSISTENCE OF MEMORY - A BIOGRAPHY OF DALI - ETHERINGTONSMITH,M SO LIBRARY JOURNAL LA English DT Book Review RP KALFATOVIC, MR (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER ART NATL PORTRAIT GALLERY LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD DEC PY 1993 VL 118 IS 21 BP 120 EP 120 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MM270 UT WOS:A1993MM27000053 ER PT J AU RILEY, S AF RILEY, S TI THE CAVEMANS VALENTINE - GREEN,GD SO LIBRARY JOURNAL LA English DT Book Review RP RILEY, S (reprint author), SMITHSONIAN INST LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD DEC PY 1993 VL 118 IS 21 BP 174 EP 174 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MM270 UT WOS:A1993MM27000286 ER PT J AU HARVEY, AW AF HARVEY, AW TI LARVAL SETTLEMENT AND METAMORPHOSIS IN THE SAND CRAB EMERITA-TALPOIDA (CRUSTACEA, DECAPODA, ANOMURA) SO MARINE BIOLOGY LA English DT Article ID DELAYED METAMORPHOSIS; UCA-PUGILATOR; GROWTH; MEGALOPAE; METABOLISM; PERIOD AB The effects of various potential cues on the survival and time to metamorphosis of larvae of the sand crab Emerita talpoida (Say) were examined. Zoeal duration, which ranged from 25 to 43 d, was not correlated with subsequent megalopal survival but had a weak, negative correlation with the duration of the megalopal stage. Neither food, sand nor water from containers with adults directly affected megalopal survival or duration. In a second experiment, the presence of sand both increased the probability of survival and shortened the duration of late zoeal stages. This is the first experimental evidence for delayed zoeal metamorphosis in a decapod. Settlement of E. talpoida appears to occur primarily during the zoeal phase, not at the megalopal stage. C1 SMITHSONIAN MARINE STN LINK PORT,FT PIERCE,FL 34946. NR 58 TC 19 Z9 22 U1 0 U2 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0025-3162 J9 MAR BIOL JI Mar. Biol. PD DEC PY 1993 VL 117 IS 4 BP 575 EP 581 DI 10.1007/BF00349768 PG 7 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA MM205 UT WOS:A1993MM20500006 ER PT J AU PIRAN, T LECAR, M GOLDWIRTH, DS DACOSTA, LN BLUMENTHAL, GR AF PIRAN, T LECAR, M GOLDWIRTH, DS DACOSTA, LN BLUMENTHAL, GR TI LIMITS ON THE PRIMORDIAL FLUCTUATION SPECTRUM - VOID SIZES AND ANISOTROPY OF THE COSMIC MICROWAVE BACKGROUND-RADIATION SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE GALAXIES, CLUSTERING; COSMIC MICROWAVE BACKGROUND; LARGE-SCALE STRUCTURE OF UNIVERSE ID COLD DARK MATTER; SCALE STREAMING MOTIONS; REDSHIFT SURVEY; IRAS GALAXIES; COSMOLOGICAL SCENARIO; UNIVERSE; RADIOMETER; BOOTES; BIAS AB We suggest the use of the typical appearance of voids on a scale of 5000 km s-1 in the galaxy distribution to estimate the power spectrum on this scale. We use a simple model for the gravitational formation of voids, and we compare the results with the matter fluctuations as constrained by the CMBR observations by COBE. We find that a power spectrum P(k) is-proportional-to k(n) with n almost-equal-to 1.25 is compatible both with COBE and with the gravitational growth of large voids in an OMEGA = 1 universe. A Harrison-Zel'dovich spectrum, n = 1, normalized to produce the observed CMBR fluctuations, does not have enough power for gravitational growth of voids with a diameter of 5000 km s-1 in an OMEGA = 1 universe. Such a spectrum would be compatible if (i) void diameters were smaller (3500 km s-1), the voids were shallower or the voids were rare (we assume that the Universe is void-filled), (ii) OMEGA < 1 (i.e. the Universe is open), (iii) galaxies do not trace matter on very large scales, or (iv) the voids do not grow gravitationally. C1 HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. CNPQ,OBSERV NACL,BR-20921 SAO CRISTOVAO,RJ,BRAZIL. UNIV CALIF SANTA CRUZ,UCO,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. RP PIRAN, T (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GORDON ST,CAMBRIDGE,MA 02138, USA. NR 37 TC 28 Z9 28 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 1 PY 1993 VL 265 IS 3 BP 681 EP 688 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MK501 UT WOS:A1993MK50100020 ER PT J AU CIPOLLINI, ML DRAKE, BG WHIGHAM, D AF CIPOLLINI, ML DRAKE, BG WHIGHAM, D TI EFFECTS OF ELEVATED CO2 ON GROWTH AND CARBON/NUTRIENT BALANCE IN THE DECIDUOUS WOODY SHRUB LINDERA BENZOIN (L.) BLUME (LAURACEAE) SO OECOLOGIA LA English DT Article DE CARBON DIOXIDE, ELEVATED; CARBON/NUTRIENT BALANCE; GROWTH; NITROGEN; CARBOHYDRATES ID CARBON-DIOXIDE CONCENTRATION; ATMOSPHERIC CO2; PLANTS; PHOTOSYNTHESIS; AVAILABILITY; ENRICHMENT; RESPONSES; NITROGEN; FOREST; TREES AB We examined the effects of elevated CO2 on growth and carbon/nutrient balance in a natural population of the deciduous temperate zone shrub Lindera benzoin. Our data concern whole plant, leaf, and stem growth for the first two seasons of a long-term field experiment in which CO2 levels were manipulated in situ. In addition to growth parameters, we evaluated changes in leaf and stem chemistry, including total nitrogen, nonstructural carbohydrates, and total phenolics. Over the course of this study, L. benzoin appeared to respond to elevated CO2 primarily by physiological and biochemical changes, with only a slight enhancement in aboveground growth (ramet height). Positive effects on aboveground growth were primarily evident in young (nonreproductive) ramets. Our results suggest that nitrogen limitation may have constrained plants to allocate carbohydrates produced in response to elevated CO2 primarily to storage and belowground growth, and perhaps to increased secondary chemical production, rather than to increased stem and leaf growth. We discuss our results in terms of changes in carbon/nutrient balance induced by elevated CO2, and provide predictions for future changes in this system based upon constraints imposed by intrinsic and extrinsic factors and their potential effects on the reallocation of stored reserves. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. NR 46 TC 58 Z9 61 U1 4 U2 17 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD DEC PY 1993 VL 96 IS 3 BP 339 EP 346 DI 10.1007/BF00317503 PG 8 WC Ecology SC Environmental Sciences & Ecology GA MP012 UT WOS:A1993MP01200008 PM 28313648 ER PT J AU MULKEY, SS WRIGHT, SJ SMITH, AP AF MULKEY, SS WRIGHT, SJ SMITH, AP TI COMPARATIVE PHYSIOLOGY AND DEMOGRAPHY OF 3 NEOTROPICAL FOREST SHRUBS - ALTERNATIVE SHADE-ADAPTIVE CHARACTER SYNDROMES SO OECOLOGIA LA English DT Article DE LEAF LONGEVITY; PHENOLOGY; PHOTOSYNTHETIC CAPACITY; RUBIACEAE; SURVIVORSHIP ID SUBGENUS PSYCHOTRIA RUBIACEAE; WATER-USE EFFICIENCY; TROPICAL FOREST; PHOTOSYNTHETIC CAPACITY; DROUGHT ACCLIMATION; SEASONAL DROUGHT; LEAF; UNDERSTORY; HERBIVORY; REVISION AB A suite of functionally-related characters and demography of three species of Neotropical shade-adapted understory shrubs (Psychotria, Rubiaceae) were studied in the field over five years. Plants were growing in large-scale irrigated and control treatments in gaps and shade in old-growth moist forest at Barro Colorado Island, Panama. Irrigation demonstrated that dry-season drought limited stomatal conductance, light saturated photosynthesis, and leaf longevity in all three species. Drought increased mortality of P. furcata. In contrast, irrigation did not affect measures of photosynthetic capacity determined with an oxygen electrode or from photosynthesis-CO2 response curves in the field. Drought stress limited field photosynthesis and leaf and plant survivorship without affecting photosynthetic capacity during late dry season. Leaves grown in high light in naturally occurring treefall gaps had higher photosynthetic capacity, dark respiration and mass per unit area than leaves grown in the shaded understory. P. furcata had the lowest acclimation to high light for all of these characters, and plant mortality was greater in gaps than in shaded understory for this species. The higher photosynthetic capacity of gap-grown leaves was also apparent when photosynthetic capacity was calculated on a leaf mass basis. Acclimation to high light involved repackaging (higher mass per unit leaf area) as well as higher photosynthetic capacity per unit leaf mass in these species. The three species showed two distinct syndromes of functionally-related adaptations to low light. P. limonensis and P. marginata had high leaf longevity (similar to 3 years), high plant survivorship, low leaf nitrogen content, and high leaf mass per unit area. In contrast, P. furcata had low leaf survivorship (similar to 1 year), high plant mortality (77-96% in 39 months), low leaf mass per unit area, high leaf nitrogen content, and the highest leaf area to total plant mass; the lowest levels of shelf shading, dark respiration and light compensation; and the highest stem diameter growth rates. This suite of characters may permit higher whole-plant carbon gain and high leaf and population turnover in P. furcata. Growth in deep shade can be accomplished through alternative character syndromes, and leaf longevity may not be correlated with photosynthetic capacity in shade adapted plants. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP MULKEY, SS (reprint author), UNIV MISSOURI,DEPT BIOL,ST LOUIS,MO 63121, USA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 47 TC 46 Z9 53 U1 0 U2 9 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD DEC PY 1993 VL 96 IS 4 BP 526 EP 536 DI 10.1007/BF00320510 PG 11 WC Ecology SC Environmental Sciences & Ecology GA MU376 UT WOS:A1993MU37600010 PM 28312459 ER PT J AU GREENBERG, R CABALLERO, CM BICHIER, P AF GREENBERG, R CABALLERO, CM BICHIER, P TI DEFENSE OF HOMOPTERAN HONEYDEW BY BIRDS IN THE MEXICAN HIGHLANDS AND OTHER WARM TEMPERATE FORESTS SO OIKOS LA English DT Article ID HONEYEATERS; LERP AB Nearctic migrants aggressively compete for the honeydew of scale insects (Margarodidae, Xylococcini) throughout the winter in oak forests of the highlands of Chiapas, Mexico. Yellow-rumped warblers (Dendroica coronata) defend territories around 3-7 infested oak trees. Aggression is directed primarily against adult male Townsend's warblers (Dendroica townsendi), which in turn defend the territory against conspecifics and other migrant warblers when the dominant yellow-rumped warbler is off territory. The white-eared hummingbird (Hylocharis leucotis) is the only resident species to commonly feed on honeydew. Birds have only rarely been reported to feed on honeydew. The reports are restricted to moist, equable temperate forests in Australia, New Zealand, the Brazilian highlands, the Andes, and the mountains of Mesoamerica. We suggest this is a case of ecological convergence under similar climatic regimes. One possible factor promoting this phenomenon in cool and relatively aseasonal habitats is the lack of ants, which are usually the primary consumers of honeydew. C1 INST CIENCIAS & ARTES CHIAPAS,TUXTLA GUITIERREZ,CHIAPAS,MEXICO. RP GREENBERG, R (reprint author), NATL ZOOL PK,SMITHSONIAN MIGRATORY BIRD CTR,WASHINGTON,DC 20008, USA. NR 25 TC 27 Z9 27 U1 1 U2 5 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0030-1299 J9 OIKOS JI Oikos PD DEC PY 1993 VL 68 IS 3 BP 519 EP 524 DI 10.2307/3544920 PG 6 WC Ecology SC Environmental Sciences & Ecology GA MN956 UT WOS:A1993MN95600015 ER PT J AU ERWIN, DH DROSER, ML AF ERWIN, DH DROSER, ML TI ELVIS TAXA SO PALAIOS LA English DT Editorial Material C1 UNIV CALIF RIVERSIDE,DEPT EARTH SCI,RIVERSIDE,CA 92521. RP ERWIN, DH (reprint author), SMITHSONIAN INST,DEPT PALEOBIOL,NHB-121,WASHINGTON,DC 20560, USA. RI Erwin, Douglas/A-9668-2009 NR 6 TC 28 Z9 32 U1 0 U2 2 PU SEPM-SOC SEDIMENTARY GEOLOGY PI TULSA PA 1731 E 71ST STREET, TULSA, OK 74136-5108 SN 0883-1351 J9 PALAIOS JI Palaios PD DEC PY 1993 VL 8 IS 6 BP 623 EP 624 DI 10.2307/3515039 PG 2 WC Geology; Paleontology SC Geology; Paleontology GA MR358 UT WOS:A1993MR35800012 ER PT J AU BARRICK, RE FISCHER, AG BOHASKA, DJ AF BARRICK, RE FISCHER, AG BOHASKA, DJ TI PALEOTEMPERATURES VERSUS SEA-LEVEL - OXYGEN-ISOTOPE SIGNAL FROM FISH BONE PHOSPHATE OF THE MIOCENE CALVERT CLIFFS, MARYLAND SO PALEOCEANOGRAPHY LA English DT Article ID BIOGENIC APATITES; ATLANTIC-OCEAN; CIRCULATION; TEMPERATURE; DEPOSITS; MARGIN; EVENT; WATER AB The use of skeletal oxygen isotopic records for use in paleotemperature reconstruction has been hampered by the lack of independent evidence for ocean water oxygen isotopic composition. The delta(18)O record from homeothermic cetaceans has provided an independent estimate of ocean delta(18)O values represented by the Calvert and Choptank formations of Maryland. Fish teeth and bones (especially shark and ray teeth) were also collected from these sediments and provide the basis for paleotemperature estimates for represented time slices of the middle Miocene. Trends in delta(18)O values of the fish phosphate throughout the Calvert Formation are of opposite polarity to the trends from the cetacean bone phosphate. Paleotemperatures calculated using the cetacean proxies for ocean delta(18)O values sharpen the already present trend, indicating that ocean temperatures increased during episodes of greater glaciation and decreased during periods of lesser or no glaciation. When using modern average ocean values of 0 parts per thousand SMOW in the paleotemperature calculation, however, corrected paleotemperatures for the Choptank Formation do not alter the existing pattern of temperatures C1 UNIV SO CALIF,DEPT GEOL SCI,LOS ANGELES,CA 90089. SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT PALEOBIOL,WASHINGTON,DC 20560. NR 47 TC 7 Z9 7 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0883-8305 J9 PALEOCEANOGRAPHY JI Paleoceanography PD DEC PY 1993 VL 8 IS 6 BP 845 EP 858 DI 10.1029/93PA01412 PG 14 WC Geosciences, Multidisciplinary; Oceanography; Paleontology SC Geology; Oceanography; Paleontology GA MM159 UT WOS:A1993MM15900009 ER PT J AU ARIAS, TD JORGE, LF GRIESE, EU INABA, T EICHELBAUM, M AF ARIAS, TD JORGE, LF GRIESE, EU INABA, T EICHELBAUM, M TI POLYMORPHIC N-ACETYLTRANSFERASE (NAT2) IN AMERINDIAN POPULATIONS OF PANAMA AND COLOMBIA - HIGH-FREQUENCIES OF POINT MUTATION 857A, AS FOUND IN ALLELE S3 M3 SO PHARMACOGENETICS LA English DT Note ID LOWER CENTRAL-AMERICA; ACETYLATION; MICROEVOLUTION; DEBRISOQUINE; UNIQUENESS; ANTIMODES; COMPLEX C1 UNIV PANAMA,WHO,COLLABORATING CTR DRUG QUAL CONTROL,PANAMA CITY,PANAMA. SMITHSONIAN TROP RES INST,PANAMA CITY,PANAMA. DR FISCHER BOSCH INST KLIN PHARMAK,STUTTGART,GERMANY. UNIV TORONTO,DEPT PHARMACOL,TORONTO M5S 1A1,ONTARIO,CANADA. RP ARIAS, TD (reprint author), ESTAFETA UNIV,COLL PHARM,APARTADO 10767,PANAMA CITY,PANAMA. NR 34 TC 19 Z9 20 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0960-314X J9 PHARMACOGENETICS JI Pharmacogenetics PD DEC PY 1993 VL 3 IS 6 BP 328 EP 331 DI 10.1097/00008571-199312000-00007 PG 4 WC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology & Pharmacy SC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology & Pharmacy GA MU436 UT WOS:A1993MU43600007 PM 8148874 ER PT J AU TIKOCHINSKY, Y SPRUCH, L AF TIKOCHINSKY, Y SPRUCH, L TI RETARDED CASIMIR INTERACTION IN THE ASYMPTOTIC DOMAIN OF AN ELECTRON AND A DIELECTRIC WALL SO PHYSICAL REVIEW A LA English DT Article ID LONG-RANGE POTENTIALS; SPECTROSCOPY AB A number of different approaches have been used to determine the interactions between a variety of pairs of polarizable systems asymptotically far apart; these are examples of retardation or Casimir interactions. The pairs include two dielectric walls, and an atom and a dielectric wall, but not an electron and a dielectric wall. (The asymptotic value of the interaction between an electron and an ideal conducting wall has been evaluated.) We here apply a method not previously used in the evaluation of retardation potentials, quantized Fresnel modes, to determine the interaction in the asymptotic domain of a polarizable system and a dielectric wall. We thereby reproduce the known result for an atom and a dielectric wall and obtain a previously unobtained result, that for an electron and a dielectric wall. The result simplifies greatly for an ideal metallic wall and for a wall made from a material such as liquid helium for which the dielectric constant is very close to unity. We also discuss the question of a connection between the electron-dielectric-wall interaction and Lifshitz's force per unit area between two dielectric walls. The determination of the amplitudes of the Fresnel modes, by quantization, is the only nonclassical element in the calculation. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP TIKOCHINSKY, Y (reprint author), NYU,DEPT PHYS,NEW YORK,NY 10003, USA. NR 29 TC 38 Z9 38 U1 0 U2 0 PU AMERICAN 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 DEC PY 1993 VL 48 IS 6 BP 4223 EP 4235 DI 10.1103/PhysRevA.48.4223 PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MM347 UT WOS:A1993MM34700034 ER PT J AU TIKOCHINSKY, Y SPRUCH, L AF TIKOCHINSKY, Y SPRUCH, L TI RETARDED ELECTRIC AND MAGNETIC CASIMIR INTERACTION OF A POLARIZABLE SYSTEM AND A DIELECTRIC PERMEABLE WALL SO PHYSICAL REVIEW A LA English DT Article ID LONG-RANGE POTENTIALS AB Using an expansion of the electromagnetic field in terms of quantized Fresnel modes, we calculate the retarded Casimir interaction, in the asymptotic domain, of a polarizable system and a dielectric permeable wall, that is, a wall characterized by a dielectric constant epsilon2 and a magnetic permeability mu2. We obtain explicit analytic results for the atom-wall and for the electron-wall interactions. When magnetic effects are ignored, the results reduce to those obtained by Lifshitz [Sov. Phys. 2, 73 (1956)] for the atom-wall interaction and by the present authors for the electron-wall interaction. The results simplify greatly for an ideal metallic wall and for a wall made of material such as liquid helium, for which the dielectric constant and the permeability are very close to unity. Other than in the determination of the amplitudes of the Fresnel modes, the calculations are entirely classical. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP TIKOCHINSKY, Y (reprint author), NYU,DEPT PHYS,NEW YORK,NY 10003, USA. NR 13 TC 10 Z9 10 U1 0 U2 0 PU AMERICAN 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 DEC PY 1993 VL 48 IS 6 BP 4236 EP 4244 DI 10.1103/PhysRevA.48.4236 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA MM347 UT WOS:A1993MM34700035 ER PT J AU KIRBY, K CZUJKO, R AF KIRBY, K CZUJKO, R TI THE PHYSICS JOB MARKET - BLEAK FOR YOUNG PHYSICISTS SO PHYSICS TODAY LA English DT Article C1 AMER INST PHYS,DIV EDUC & EMPLOYMENT STAT,NEW YORK,NY. RP KIRBY, K (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD DEC PY 1993 VL 46 IS 12 BP 22 EP 27 DI 10.1063/1.881392 PG 6 WC Physics, Multidisciplinary SC Physics GA MT861 UT WOS:A1993MT86100006 ER PT J AU PROSSER, CF SHETRONE, MD MARILLI, E CATALANO, S WILLIAMS, SD BACKMAN, DE LAAKSONEN, BD ADIGE, V MARSCHALL, LA STAUFFER, JR AF PROSSER, CF SHETRONE, MD MARILLI, E CATALANO, S WILLIAMS, SD BACKMAN, DE LAAKSONEN, BD ADIGE, V MARSCHALL, LA STAUFFER, JR TI ROTATION PERIODS OF OPEN-CLUSTER STARS .2. SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID ALPHA-PERSEI CLUSTER; LOWER MAIN-SEQUENCE; LOW-MASS STARS; TIME-SERIES; G-DWARFS; VELOCITIES; PLEIADES AB We present the results from a photometric monitoring program of 21 stars observed during 1992 in the Pleiades and Alpha Persei open clusters. Period determinations for 16 stars are given, 13 of which are the first periods reported for these stars. Brightness variations for an additional five cluster stars are also given. One K dwarf member of the alpha Per cluster is observed to have a period of rotation of only 4.39 hr, perhaps the shortest period currently known among BY Draconis variables. The individual photometric measurements have been deposited with the NSSDC. Combining current X-ray flux determinations with known photometric periods, we illustrate the X-ray activity/rotation relation among Pleiades K dwarfs based on available data. C1 UNIV CALIF SANTA CRUZ,UNIV CALIF OBSERV,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. OSSERV ASTROFIS CATANIA,I-95125 CATANIA,ITALY. FRANKLIN & MARSHALL COLL,DEPT PHYS & ASTRON,LANCASTER,PA 17604. GETTYSBURG COLL,DEPT PHYS,GETTYSBURG,PA 17325. RP PROSSER, CF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 28 TC 49 Z9 49 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD DEC PY 1993 VL 105 IS 694 BP 1407 EP 1414 DI 10.1086/133322 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MP695 UT WOS:A1993MP69500003 ER PT J AU SCHECHTER, PL HUCHRA, JP TONRY, JL AF SCHECHTER, PL HUCHRA, JP TONRY, JL TI A J1254-1230 - A NEW POLAR-RING GALAXY SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article AB A new polar-ring galaxy has been found at 12h54m20.06s-12-degrees 29'58''.0 (J2000) with a total blue magnitude of 16.1. The inner component looks much like an E2 galaxy, while the outer component, with roughly one-fifth the brightness, lies within 2-degrees of perpendicular. A heliocentric redshift of 5456 km s-1 has been measured. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP SCHECHTER, PL (reprint author), MIT,77 MASSACHUSETTS AVE,CAMBRIDGE,MA 02139, USA. NR 8 TC 3 Z9 3 U1 0 U2 1 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD DEC PY 1993 VL 105 IS 694 BP 1470 EP 1471 DI 10.1086/133330 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MP695 UT WOS:A1993MP69500011 ER PT J AU WILKERSON, SJK AF WILKERSON, SJK TI ESCALANTES ENTRADA - THE LOST AZTEC GARRISON OF THE MAR-DEL-NORTE IN NEW-SPAIN SO RESEARCH & EXPLORATION LA English DT Article AB When Hernan Cortes started from his new base on the Mexican shore of the Mar del Norte for the Aztec capital Tenochtitlan in 1519, he left juan de Gutierrez Escalante in charge of nearly a 3rd of his army. This trusted friend was to secure the vital coastal region near the great Totonac city of Zempoala. To prevent an Aztec garrison from exacting tribute from Totonac towns in the Nautla Valley, Escalante marched northward on his own initiative with a combined Spanish-Totonac host. Escalante's ill-fated encounter with the Aztec squadrons was the 1st major Spanish disaster in Mexico, and it altered the process of the conquest itself. This important garrison, key control point for all of present-day north-central Veracruz, was later totally lost from view. Sixteenth-century chronicles in conjunction with field inspection suggest that the garrison was on the upper Nautla River within a 2-millennia-old corridor for highland-lowland contact. C1 INST CULTURAL ECOL TROP,GUTIERREZ ZAMORA,MEXICO. SMITHSONIAN INST,WASHINGTON,DC 20560. RP WILKERSON, SJK (reprint author), INST CULTURAL ECOL TROP,POB 3324 DYAL,TAMPA,FL 33601, USA. NR 37 TC 0 Z9 0 U1 0 U2 1 PU NATL GEOGRAPHIC SOC PI WASHINGTON PA 17TH AND M STS NW, WASHINGTON, DC 20036 SN 8755-724X J9 RES EXPLOR JI Res. Explor. PD WIN PY 1993 VL 9 IS 1 BP 12 EP 31 PG 20 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LE256 UT WOS:A1993LE25600006 ER PT J AU GUZMAN, HM CORTES, J AF GUZMAN, HM CORTES, J TI LATIN-AMERICAN ASSOCIATION OF CORAL-REEFS SO REVISTA DE BIOLOGIA TROPICAL LA Spanish DT Article RP GUZMAN, HM (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU REVISTA DE BIOLOGIA TROPICAL PI SAN JOSE PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, COSTA RICA SN 0034-7744 J9 REV BIOL TROP JI Rev. Biol. Trop. PD DEC PY 1993 VL 41 SU 1 BP 69 EP 70 PG 2 WC Biology SC Life Sciences & Biomedicine - Other Topics GA NB722 UT WOS:A1993NB72200016 ER PT J AU GUZMAN, HM CORTES, J AF GUZMAN, HM CORTES, J TI CORAL-REEFS OF THE TROPICAL EASTERN PACIFIC - REVIEW AND PERSPECTIVES SO REVISTA DE BIOLOGIA TROPICAL LA Spanish DT Article DE EASTERN PACIFIC; CORAL REEFS; CORALS; REVIEW PAPER AB This work reviews and summarizes published studies on: regional climate and hydrography, origin, Holocene history, growth, reproduction, synecology, natural and anthropogenic disturbances, recovery. recolonization, management and conservation of coral reefs in the tropical Eastern Pacific. Research fields which deserve immediate attention am: 1) taxonomy of scleractinian corals and other invertebrates; 2) dynamics of corals and associated organisms (reproduction, competition, predation, symbiosis, growth and diseases); 3) local and regional physical oceanography of coastal areas for the development of models on dispersion of organisms and pollutants, 4) an inventory as a basis for a regional management plan; 5) evaluation of ongoing environmental impacts (natural and anthropogenic); and 6) methods to diagnose the economical value of reef resources. RP GUZMAN, HM (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 0 TC 62 Z9 64 U1 2 U2 5 PU REVISTA DE BIOLOGIA TROPICAL PI SAN JOSE PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, COSTA RICA SN 0034-7744 J9 REV BIOL TROP JI Rev. Biol. Trop. PD DEC PY 1993 VL 41 IS 3A BP 535 EP 557 PG 23 WC Biology SC Life Sciences & Biomedicine - Other Topics GA PC554 UT WOS:A1993PC55400027 ER PT J AU HOLST, I GUZMAN, HM AF HOLST, I GUZMAN, HM TI CHECKLIST OF HERMATYPIC CORALS (ANTHOZOA, SCLERACTINIA, HYDROZOA, MILLEPORINA) IN BOTH COASTS OF THE ISTHMUS OF PANAMA SO REVISTA DE BIOLOGIA TROPICAL LA Spanish DT Note DE DIVERSITY; SCLERACTINIAN; HYDROCORAL; CORAL REEFS; PANAMA AB Fifty eight and nineteen hermatypic scleractinian coral species are reported for the Caribbean and Pacific coasts of Panama, respectively. Three species of Millepora are reported for each side of the isthmus. This list includes 11 new Caribbean and four new Pacific records of scleractinian species. A new possibly endemic species, Porites collonesis, is included in the list. The genus Siderastrea is reported from the Eastern Pacific for the first time. Millepora boschmai (a new species presumably extinct) and a large solitary individual of Dendrogyra cylindrus were found. Several species are still undescribed. Taxonomic work is urgently required to determine the diversity of corals in the region before populations are reduced and management plans are implemented. RP HOLST, I (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 0 TC 14 Z9 15 U1 1 U2 1 PU REVISTA DE BIOLOGIA TROPICAL PI SAN JOSE PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, COSTA RICA SN 0034-7744 J9 REV BIOL TROP JI Rev. Biol. Trop. PD DEC PY 1993 VL 41 IS 3B BP 871 EP 875 PG 5 WC Biology SC Life Sciences & Biomedicine - Other Topics GA PE590 UT WOS:A1993PE59000012 ER PT J AU BRENER, AGF SIERRA, C AF BRENER, AGF SIERRA, C TI DISTRIBUTION OF ATTACKED PLANTS ALONG TRAILS IN LEAF-CUTTING ANTS (HYMENOPTERA, FORMICIDAE) - CONSEQUENCES IN TERRITORIAL STRATEGIES SO REVISTA DE BIOLOGIA TROPICAL LA English DT Note DE LEAF-CUTTING ANTS; TERRITORIALITY; TRAIL SYSTEM; ANGULAR STATISTICS AB Leaf-cutting ants generally abandon plants before they are completely defoliated, following the intraspecific leaf quality variation among and within plants. One Atta cephalotes nest was studied to determine the trail rotation consequences in the territorial defense development. We supposed that, as a result of changes in the harvest activity and trail use, leafcutting ants obtain a good and unpredictable coverage of the foraging area. The study was conducted in Barro Colorado Island, Panama, in October, 1989. During seven sampling days we registered number, distance and orientation of attacked/abondoned trees and new/abandoned trails. The results suggest a large and unpredictable covering of the foraging area as a consequence of rotational harvest activity. Since both, plants and colony are sessile, advantages of dominating a large foraging area are discussed. RP BRENER, AGF (reprint author), SMITHSONIAN TROP RES INST,APTDO 2072,BALBOA,PANAMA. NR 0 TC 5 Z9 5 U1 1 U2 4 PU REVISTA DE BIOLOGIA TROPICAL PI SAN JOSE PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, COSTA RICA SN 0034-7744 J9 REV BIOL TROP JI Rev. Biol. Trop. PD DEC PY 1993 VL 41 IS 3B BP 891 EP 896 PG 6 WC Biology SC Life Sciences & Biomedicine - Other Topics GA PE590 UT WOS:A1993PE59000017 ER PT J AU COOPER, A ATKINSON, IAE LEE, WG WORTHY, TH AF COOPER, A ATKINSON, IAE LEE, WG WORTHY, TH TI EVOLUTION OF THE MOA AND THEIR EFFECT ON THE NEW-ZEALAND FLORA SO TRENDS IN ECOLOGY & EVOLUTION LA English DT Review ID DINORNITHIFORMES; PLANTS; AVES; DIVARICATE; PROGRESS AB It is 150 years since Sir Richard Owen announced the former existence of large flightless ostrich-like birds in New Zealand based on a fragment of femur presented to him in England. Numerous studies of this extinct group of giant birds, now known by the Polynesian (plural) name 'moa', have provided much information about their effects on the flora, their recent extinction, and the evolutionary history of New Zealand and its endemic biota. Significant revision of moa taxonomy and ecology continues, and recent molecular phylogenetic analyses have stimulated new hypotheses about moa evolution. C1 MANAAKI WHENUA LANDCARE RES,LOWER HUTT,NEW ZEALAND. MANAAKI WHENUA LANDCARE RES,DUNEDIN,NEW ZEALAND. RP COOPER, A (reprint author), SMITHSONIAN INST,NATL ZOOL PK,MOLEC GENET LAB,WASHINGTON,DC 20008, USA. RI Worthy, Trevor/B-3781-2012; Cooper, Alan/E-8171-2012 OI Worthy, Trevor/0000-0001-7047-4680; Cooper, Alan/0000-0002-7738-7851 NR 29 TC 29 Z9 29 U1 1 U2 18 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0169-5347 J9 TRENDS ECOL EVOL JI Trends Ecol. Evol. PD DEC PY 1993 VL 8 IS 12 BP 433 EP 437 DI 10.1016/0169-5347(93)90005-A PG 5 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA MH849 UT WOS:A1993MH84900005 PM 21236223 ER PT J AU BACKER, DC ZENSUS, JA KELLERMANN, KI REID, M MORAN, JM LO, KY AF BACKER, DC ZENSUS, JA KELLERMANN, KI REID, M MORAN, JM LO, KY TI UPPER LIMIT OF 3.3 ASTRONOMICAL UNITS TO THE DIAMETER OF THE GALACTIC-CENTER RADIO-SOURCE SGR-A SO SCIENCE LA English DT Article ID ANISOTROPIC MAGNETOGASDYNAMIC TURBULENCE; SAGITTARIUS-A; DENSITY-FLUCTUATIONS; INTERSTELLAR-MEDIUM; BLACK-HOLE; ASTERISK; MODEL; SIZE AB Sagittarius (Sgr) A* is a unique radio source located at the center of our galaxy. The radiation from Sgr A* may be generated in matter accreting onto a massive black hole. In observations at long wavelengths, the apparent angular size of Sgr A* decreases in the manner expected for emission from a point source scattered by electron density fluctuations along the line of sight. Measurements at a wavelength of 7 millimeters with the nearly completed Very Long Baseline Array indicate a size of 0.7 milliarc seconds, which is consistent with an extrapolation from results at longer wavelengths. The true size of Sgr A* must be less than 0.4 milliarc seconds, or 3.3 astronomical units. The inferred black hole mass is less than 1.5 x 10(6) solar masses according to a recent model for the emission. C1 NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. NATL RADIO ASTRON OBSERV,CHARLOTTESVILLE,VA 22903. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV ILLINOIS,DEPT ASTRON,URBANA,IL 61801. RP BACKER, DC (reprint author), UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720, USA. NR 29 TC 31 Z9 32 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD NOV 26 PY 1993 VL 262 IS 5138 BP 1414 EP 1416 DI 10.1126/science.262.5138.1414 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA MJ046 UT WOS:A1993MJ04600030 PM 17736821 ER PT J AU SORENSEN, SS GROSSMAN, JN AF SORENSEN, SS GROSSMAN, JN TI ACCESSORY MINERALS AND SUBDUCTION ZONE METASOMATISM - A GEOCHEMICAL COMPARISON OF 2 MELANGES (WASHINGTON AND CALIFORNIA, USA) SO CHEMICAL GEOLOGY LA English DT Article; Proceedings Paper CT Session on Geochemistry of Accessory Minerals as part of the 3rd V M Goldschmidt Conference CY MAY 08-10, 1992 CL RESTON, VA SP GEOCHEM SOC, ASSOC EXPLORAT GEOCHEMISTS, AMER CHEM SOC, DIV GEOCHEM, EUROPEAN ASSOC GEOCHEM, GEOCHEM SOC JAPAN, INT ASSOC GEOCHEM & COSMOCHEM, SOC ENVIRONM GEOCHEM & HLTH, US GEOL SURVEY ID CATALINA-SCHIST TERRANE; HIGH-PRESSURE; SOUTHERN-CALIFORNIA; FRANCISCAN-COMPLEX; GARNET AMPHIBOLITES; ROCKS; MAGMAS; METAMORPHISM; TEMPERATURE; BLUESCHIST AB The ability of a subducted slab or subducted sediment to contribute many incompatible trace elements to arc source regions may depend on the stabilities of accessory minerals within these rocks, which can only be studied indirectly. In contrast, the role of accessory minerals in lower-T and -P metasomatic processes within paleo-subduction zones can be studied directly in subduction-zone metamorphic terranes. The Gee Point-Iron Mountain locality of the Shuksan Metamorphic Suite, North Cascades, Washington State, is a high-T melange of metamatic blocks in a matrix of meta-ultramafic rocks. This melange is similar in geologic setting and petrology to the upper part of an unnamed amphibolite unit of the Catalina Schist, Santa Catalina Island, southern California. Both are interpreted as shear zones between mantle and slab rocks that formed during the early stages of subduction. Some garnet amphibolite blocks from the Gee Point-Iron Mountain locality display trace-element enrichments similar to those in counterparts from the Catalina Schist. Some Catalina blocks are highly enriched in Th, rare-earth elements (REE), the high-field-strength elements Ti, Nh, Ta, Zr and Hf (HFSE), U and Sr compared to mid-ocean ridge basalt (MORB), and to other garnet amphibolite blocks in the same unit. Textural and geochemical data indicate that accessory minerals of metamorphic origin control the enrichment of Th, REE and HFSE in blocks from both areas. The Mg-rich rinds around blocks and the meta-ultramafic matrix from both melanges are highly enriched in a large number of trace elements compared to harzburgites, dunites and serpentinites. Evidence for recrystallization or formation of accessory minerals in the former rocks suggests that these minerals control some of the trace-element enrichments. Data from the Gee Point and Catalina melanges suggest that the accessory minerals titanite, rutile, apatite, zircon and REE-rich epidote play a significant role in the enrichment of trace elements in both mafic and ultramafic rocks during subduction-related fluid-rock interaction. Mobilization of incompatible elements, and deposition of such elements in the accessory minerals of mafic and ultramafic rocks may be fairly common in fluid-rich metamorphic environments in subduction zones. C1 US GEOL SURVEY,NATL CTR,RESTON,VA 22092. RP SORENSEN, SS (reprint author), SMITHSONIAN INST,NATL MUSUEM NAT HIST,DEPT MINERAL SCI,NHB-119,WASHINGTON,DC 20560, USA. NR 61 TC 52 Z9 55 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD NOV 25 PY 1993 VL 110 IS 1-3 BP 269 EP 297 DI 10.1016/0009-2541(93)90258-K PG 29 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA MR702 UT WOS:A1993MR70200016 ER PT J AU BLACKMAN, EG FIELD, GB AF BLACKMAN, EG FIELD, GB TI OHMS LAW FOR A RELATIVISTIC PAIR PLASMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID JETS AB We derive the fully relativistic Ohm's law for an electron-positron plasma. The absence of nonresistive terms in Ohm's law and the natural substitution of the four-velocity for the velocity flux in the relativistic bulk plasma equations do not require the field gradient length scale to be much larger than the lepton inertial lengths, or the existence of a frame in which the distribution functions are isotropic. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP BLACKMAN, EG (reprint author), HARVARD UNIV,CAMBRIDGE,MA 02138, USA. NR 14 TC 37 Z9 38 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 22 PY 1993 VL 71 IS 21 BP 3481 EP 3484 DI 10.1103/PhysRevLett.71.3481 PG 4 WC Physics, Multidisciplinary SC Physics GA MH745 UT WOS:A1993MH74500022 ER PT J AU ZHANG, XL WRIGHT, M ALEXANDER, P AF ZHANG, XL WRIGHT, M ALEXANDER, P TI HIGH-RESOLUTION CO OBSERVATIONS AND H-1 OBSERVATIONS OF THE INTERACTING GALAXY NGC-3627 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, EVOLUTION; GALAXIES, INDIVIDUAL (NGC-3627); GALAXIES, INTERACTIONS; GALAXIES, ISM; GALAXIES, STRUCTURE ID SEYFERT-GALAXIES; NEUTRAL HYDROGEN; NUCLEAR ACTIVITY; LEO TRIPLET; DYNAMICS; EMISSION; BARS; QSOS AB A nearby normal spiral galaxy, NGC 3627, which is a member of the interacting group the Leo Triplet, is mapped in the CO 1-0 transition for its central 4.5 kpc region using the Berkeley-Illinois-Maryland Association (BIMA) interferometer array with 7'' resolution, and in the 21 cm emission of neutral hydrogen for the entire galaxy using the Very Large Array (VLA) with 30'' resolution. The combined CO and H I data provide new information, both on the history of the past encounter of NGC 3627 with its companion galaxy NGC 3628 and on the subsequent dynamical evolution of NGC 3627 as a result of this tidal interaction. In particular, the morphological and kinematic information indicates that the gravitational torque experienced by NGC 3627 during the close encounter triggered a sequence of dynamical processes, including the formation of prominent spiral structures, the central concentration of both the stellar and gas mass, the formation of two widely separated and outwardly located inner Lindblad resonances, and the formation of a gaseous bar inside the inner resonance. These processes in coordination allow the continuous and efficient radial mass accretion across the entire galactic disk. The observational result in the current work provides a detailed picture of a nearby interacting galaxy which is very likely in the process of evolving into a nuclear active galaxy. It also suggests one of the possible mechanisms for the formation of successive instabilities in postinteraction galaxies, which could very efficiently channel the interstellar medium into the center of the galaxy to fuel nuclear starburst and Seyfert activities. C1 MULLARD RADIO ASTRON OBSERV,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP ZHANG, XL (reprint author), UNIV CALIF BERKELEY,RADIO ASTRON LAB,BERKELEY,CA 94720, USA. NR 45 TC 37 Z9 37 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 1993 VL 418 IS 1 BP 100 EP 112 DI 10.1086/173374 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MF864 UT WOS:A1993MF86400011 ER PT J AU FULLER, GA MYERS, PC AF FULLER, GA MYERS, PC TI THERMAL MATERIAL IN DENSE CORES - A NEW NARROW-LINE PROBE AND TECHNIQUE OF TEMPERATURE DETERMINATION SO ASTROPHYSICAL JOURNAL LA English DT Article ID DARK CLOUDS; MOLECULAR CLOUDS; NH3 OBSERVATIONS; STAR FORMATION; CYANOACETYLENE; SPECTRA; AMMONIA; TMC-1; HC5N; HC3N AB A survey of dense cores in nearby dark clouds indicates that the J = 4 --> 3 transition of HC3N is a good tracer of very quiescent, dense gas. High spectral resolution observations at 12 positions show the line to have a median intrinsic velocity dispersion of 0.088 km s-1 as compared to 0.100 km s-1 for new high spectral resolution measurements of the NH3 (1, 1) transition at the same positions. The narrowest HC3N line has an observed FWMH of only 0.14 km s-1, corresponding to an intrinsic velocity dispersion of only 0.058 +/- 0.002 km s-1. Maps of two regions show the HC3N emission to be spatially coincident with the NH3 emission and to be comparable, or smaller, in extent. This coincidence, together with the similar velocities of the transitions, suggests that these two transitions are tracing the same material within these cores. Adopting a two-component model for the velocity dispersion of these lines, we estimate the kinetic temperature and the nonthermal velocity dispersion in these cores. The mean kinetic temperature derived from the velocity dispersions in the cores is 9.2 +/- 0.2 K, in good agreement with the value of 10.2 +/- 0.6 K determined from NH3 observations of the same objects. The kinetic temperature of 9.2 K is also similar to the mean excitation temperature of the HC3N line, 8.4 K. This similarity suggests that the transition is close to being thermalized and indicates that the number density in these cores is close to 3 x 10(4) cm-3. These new temperature and nonthermal velocity dispersion determinations indicate that the nonthermal velocity dispersion increases as the 0.6 +/- 0.1 power of the map size, while the total velocity dispersion increases as the 0.05 +/- 0.07 power of the map size. In an equilibrium model, these relations correspond to a number density profile n approximately r-1.9, which is very close to that expected for an isothermal sphere. The magnetic field strength whose energy density equals that of the nonthermal motions is typically 10 muG over the range of core sizes 0.02-0.11 pc. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP FULLER, GA (reprint author), NATL RADIO ASTRON OBSERV,949 N CHERRY AVE,CAMPUS BLDG 65,TUCSON,AZ 85721, USA. NR 44 TC 76 Z9 76 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 1993 VL 418 IS 1 BP 273 EP 286 DI 10.1086/173389 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MF864 UT WOS:A1993MF86400026 ER PT J AU BALLY, J LADA, EA LANE, AP AF BALLY, J LADA, EA LANE, AP TI THE L1448 MOLECULAR JET SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, INTERSTELLAR, CONTINUUM; ISM, INDIVIDUAL (L1448); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; STARS, FORMATION ID EXCITING SOURCE; BIPOLAR OUTFLOW; EMISSION; VELOCITY; BULLETS; L-1448; CLOUD; ORION AB We have obtained near-infrared images of the L1448 molecular outflow in the J, H, and K bands and through a 1% passband filter centered on the 2.122 mum v = 1-0 S(1) line of molecular hydrogen. We report the discovery of a highly collimated, clumpy, and bipolar molecular hydrogen jet associated with the L1448 molecular outflow. We estimate that the total H-2 luminosity of the L1448 outflow is about 0.2 L.. Most of the line emission in the northern outflow lobe arises from a narrow, curving filament consisting of a chain of knots. Some H-2 knots and the bow-shaped emission regions protruding several arcseconds to the west of the filament may be shocks associated with CO- and SiO-emitting ''bullets'' seen in millimeter-wave observations. We interpret the H-2 emission in the context of a jet-driven model for molecular outflows. Bright H-2 emission near the molecular ''bullets'' may be produced by shocks propagating into the moving medium, while the extended and curving filament may be driven by expanding bow shocks in the wakes of the ''bullets.'' A conical 2.2 mum continuum nebula extends from the driving source of the L1448 outflow toward the blueshifted outflow lobe. Several knots of H-2 emission to the northeast of the main L1448 H-2 filament may be associated with a separate outflow emerging from L1448 IRS 3, which we estimate has a total H-2 luminosity of about 0.01 L.. C1 UNIV COLORADO,CTR ASTROPHYS & SPACE ASTRON,BOULDER,CO 80309. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP BALLY, J (reprint author), UNIV COLORADO,DEPT ASTROPHYS PLANETARY & ATMOSPHER SCI,CAMPUS BOX 389,BOULDER,CO 80309, USA. OI BALLY, JOHN/0000-0001-8135-6612 NR 21 TC 63 Z9 63 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 1993 VL 418 IS 1 BP 322 EP & DI 10.1086/173393 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MF864 UT WOS:A1993MF86400030 ER PT J AU GARAY, G RODRIGUEZ, LF MORAN, JM CHURCHWELL, E AF GARAY, G RODRIGUEZ, LF MORAN, JM CHURCHWELL, E TI VLA OBSERVATIONS OF STRONG IRAS POINT SOURCES ASSOCIATED WITH COMPACT H-II REGIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; INTERSTELLAR, CONTINUUM; RADIO CONTINUUM, INTERSTELLAR ID 1.3MM CONTINUUM OBSERVATIONS; STAR FORMATION; HII-REGIONS; RADIO OBSERVATIONS; OB CLUSTERS; EMISSION; AMMONIA; CORE; MASS; GHZ AB We present multifrequency radio continuum observations made with the Very Large Array of a sample of 16 strong IRAS point sources associated with compact H ii regions. Twelve sources were observed at 1.5, 4.9, and 15.0 GHz, with angular resolution of approximately 15'','5'', and 3'', respectively. Three were observed at 1.5 and 4.9 GHz, and one at 1.5 GHz. The radio continuum brightness distribution was resolved for all sources. Nine objects show simple morphologies: core-halo (2), shell (3), cometary (3), and bipolar (1), consistent with their being excited by a single star. The remaining seven sources show complex radio structure. The average infrared luminosity of the complex sources is 3 times larger than that of the simple sources. The morphologies of the complex H II regions, which can be decomposed into multiple components, together with their large IR luminosities, suggest that these regions are excited by a cluster of stars. Furthermore, the observed infrared and radio properties suggest that the cluster contains only massive stars (O and early B spectral types). About 70% of the individual regions of ionized gas have linear diameters between 0.1 and 1 pc and electron densities between 10(3) and 10(4) cm-3, corresponding to H II regions of class II in the classification scheme of Habing & Israel (1979). The electron densities and diameters follow a power-law relation of the form N(e) is-proportional-to D-1. For the sources showing simple morphologies, the ratio between the total infrared and Lyman-alpha luminosities ranges from 6 to 21. If single stars excite these simple H II regions, then the infrared excesses are fully accounted for by dust emission in large, cool envelopes heated by stellar photons longward of the Lyman continuum limit and by optical/near-infrared photons emitted by hot dust within the H II regions. The fraction of Lyman continuum photons absorbed by dust within the H II regions is typically 55%. C1 Univ Nacl Autonoma Mexico, INST ASTRON, MEXICO CITY 04510, DF, MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. UNIV WISCONSIN, WASHBURN OBSERV, MADISON, WI 53706 USA. RP GARAY, G (reprint author), UNIV CASILLA, DEPT ASTRON, CASILLA 36D, CHILE. RI Garay, Guido/H-8840-2013 OI Garay, Guido/0000-0003-1649-7958 NR 43 TC 110 Z9 111 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 1993 VL 418 IS 1 BP 368 EP 385 DI 10.1086/173396 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MF864 UT WOS:A1993MF86400033 ER PT J AU DUPREE, AK BRICKHOUSE, NS DOSCHEK, GA GREEN, JC RAYMOND, JC AF DUPREE, AK BRICKHOUSE, NS DOSCHEK, GA GREEN, JC RAYMOND, JC TI THE EXTREME-ULTRAVIOLET SPECTRUM OF ALPHA AURIGAE (CAPELLA) SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, CHROMOSPHERES; STARS, GIANT; STARS, MASS LOSS; STARS, INDIVIDUAL (ALPHA-AURIGAE) ID CORONA; IRON; EMISSION; LINES; STARS; FE AB Extreme ultraviolet spectra (lambdalambda 70-740) of the bright spectroscopic binary system, Capella (Alpha Aurigae) obtained with the Extreme Ultraviolet Explorer satellite (EUVE), show a rich emission spectrum-dominated by iron emission lines: Fe XV-XXIV. The emission measure for the system reveals a continuous distribution of plasma temperatures between 10(5) and 10(7.8) K, with a clear minimum near 10' K and a local maximum at 6 x 10(6) K. Electron density diagnostics based on Fe XXI indicate N(e) almost-equal-to 4 x 10(11)-10(13) cm-3 at T(e) = 10(7) K. C1 UNIV COLORADO, CASA, BOULDER, CO 80304 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. RP NASA, WASHINGTON, DC 20546 USA. NR 40 TC 117 Z9 117 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 1993 VL 418 IS 1 BP L41 EP L44 DI 10.1086/187111 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MF865 UT WOS:A1993MF86500011 ER PT J AU KALFATOVIC, MR AF KALFATOVIC, MR TI DISUVERO,MARK - OPEN SECRET - SCULPTURE, 1990-92 - DISUVERO,M SO LIBRARY JOURNAL LA English DT Book Review RP KALFATOVIC, MR (reprint author), SMITHSONIAN INST,NATL MUS AMER ART,NATL PORTRAIT GALLERY LIB,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD NOV 15 PY 1993 VL 118 IS 19 BP 75 EP 75 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA MG194 UT WOS:A1993MG19400045 ER PT J AU YI, IS AF YI, IS TI RELATIVISTIC BULK MOTION AND STATISTICS OF BEAMED GAMMA-RAY BURSTS SO PHYSICAL REVIEW D LA English DT Article ID ACTIVE GALACTIC NUCLEI; OBJECTS; MODELS AB Gamma-ray bursts may be from jetlike sources in relativistic bulk motion. In this case, the emission of gamma rays is strongly beamed along the direction of the bulk motion. We analyze effects of the relativistic bulk motion and the resulting beamed emission on statistics of the gamma-ray bursts. RP YI, IS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 36 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 15 PY 1993 VL 48 IS 10 BP 4518 EP 4522 DI 10.1103/PhysRevD.48.4518 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA MJ061 UT WOS:A1993MJ06100003 ER PT J AU KOCHANEK, CS AF KOCHANEK, CS TI THE ANALYSIS OF GRAVITATIONAL LENS SURVEYS .1. SELECTION FUNCTIONS AND AMBIGUOUS CANDIDATES SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; GRAVITATIONAL LENSING; SURVEYS ID LUMINOSITY FUNCTION; GALAXY LUMINOSITY; MAGNITUDES; EVOLUTION; UNIVERSE; LIMITS AB Our analysis of the four optical surveys for gravitational lenses shows that only one more lens is expected among the unidentified image pairs found in the surveys. The best candidates and the estimated likelihood that they are lenses are 0011-012 at 36%, 2355-019 at 26%, DW 0400+258 at 18%, and 1318+111 at 10% and potentially 0205 - 379 at 69% because its companion is identified as a star only by its red color. The distributions of unidentified candidates from Crampton et al. (1992) and the ESO/Liege Survey in both separation from the quasar and magnitude are consistent with the expected distribution of Galactic stars. Stars are a important source of background contamination in lens surveys, and stellar companions to quasars become more common than lensed images at the confusion limit of approximately 2.5 (1.2) mag fainter than 17 (19) V mag quasars. Cross-comparisons of candidates in the four surveys show that point-spread function asymmetries are an unreliable means of identifying lens candidates for statistical purposes because they have a very high false positive rate. These candidates must be excluded from statistical analyses of lens surveys. We estimate the completeness of the surveys is near 80% for lenses produced by E and SO galaxies and near 70% for spiral galaxies. We use the incidence of quasar-quasar pairs in the sample to estimate that the quasar-quasar correlation length is between 1 h-1(1 + z)-1 Mpc less than or similar r0 less than or similar 18 h-1 (1 + z)-1 Mpc, consistent with other measurements of quasar clustering. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 32 TC 25 Z9 25 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 438 EP 449 DI 10.1086/173324 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100005 ER PT J AU RUIZLAPUENTE, P LICHTI, GG LEHOUCQ, R CANAL, R CASSE, M AF RUIZLAPUENTE, P LICHTI, GG LEHOUCQ, R CANAL, R CASSE, M TI GAMMA-RAY ESCAPE IN TYPE-IA SUPERNOVAE - THE 847 KEV-MB DIAGRAM SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, DISTANCES AND REDSHIFTS; GAMMA-RAYS, OBSERVATIONS; GAMMA RAYS, THEORY; SUPERNOVAE, GENERAL; SUPERNOVAE, INDIVIDUAL ID WHITE-DWARF MODELS; SPECTRA AB The relationship between flux in the 847 keV line and optical (B) magnitude is examined for the two Type Ia supernovae (SNe Ia) observed so far in the gamma-ray domain. This type of analysis allows us to discriminate between possible models for a given SN Ia event. In the case of SN 1991T in NGC 4527, in view of the constraints provided by CGRO on the flux of the 847 keV line and the B-magnitude of the supernova at the phase of the gamma-ray observation it is possible to discard many of the SN Ia models so far proposed. Models giving rise to a gamma-ray escape fraction larger than 80% at 70-80 days after explosion do not fall within the validity region of the 847 keV flux-m(B) diagram. This diagram allows us to put limits on the distance to the host galaxy of the supernova and to investigate the reasonable range of values for the reddening, compatible with the observational and theoretical constraints. The case of SN 1986G, for which SMM upper limits are available (Matz & Share 1990), is examined as well. C1 MAX PLANCK INST EXTRATERR PHYS,W-8046 GARCHING,GERMANY. UNIV BARCELONA,FAC FIS,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. CENS,CTR ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. RP RUIZLAPUENTE, P (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 43 TC 10 Z9 10 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 547 EP 552 DI 10.1086/173333 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100014 ER PT J AU TORRELLES, JM GOMEZ, JF HO, PTP ANGLADA, G RODRIGUEZ, LF CANTO, J AF TORRELLES, JM GOMEZ, JF HO, PTP ANGLADA, G RODRIGUEZ, LF CANTO, J TI AMMONIA EMISSION DOWNSTREAM OF THE HERBIG-HARO OBJECT .1. SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (HH 1-2); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; STARS, PRE-MAIN-SEQUENCE ID VLA OBSERVATIONS; HH-1; CONTINUUM; OUTFLOWS; CLOUDS; REGIONS; SYSTEM; GAS AB We report VLA D-configuration NH3(1, 1) and (2, 2) observations of Herbig-Haro Object 1 (HH 1). In direct analogy to the case of HH 2 (Torrelles et al. 1992b), we have found ammonia emission immediately adjacent to and downstream of HH 1. As in the case of HH 2, there is no evidence of any significant perturbation in terms of heating and broadening of the ammonia lines. This high degree of symmetry between the HH 1 and HH 2 ammonia clumps implies a causal physical relationship between the HH objects and the ammonia emission, discarding the possibility that these clumps are just ambient clumps projected by chance downstream of the HH objects. In particular, we think that there is the possibility that these clumps delineate nearby ambient gas whose ammonia emission is enhanced by some still unknown process related to the radiation field generated at the head of the jet of the VLA-1 source. However, detailed theoretical calculations will be needed to investigate this possibility. We also detected two other clumps located to -the southwest of HH 1. One of them, seen only in the (2, 2) line, coincides with an H2O maser, and its temperature (greater than or similar to 30 K) suggests that there might be a young star embedded in this clump. The other clump is located approximately 15'' south of the H2O maser. We also detected ammonia emission from the previously reported condensation associated with VLA-1 (Rodriguez et al. 1990a). As it was also previously reported, this condensation consists of two halves with a velocity shift of approximately 2 km s-1 of the same direction and sign as those of the HH 1-2 optical outflow. However, on dynamical considerations, we argue that this shift could represent expanding or contracting motions of a flattened structure seen almost edge-on, rather than a molecular outflow of low collimation. C1 UNIV BARCELONA, DEPT ASTRON & METEOROL, E-08028 BARCELONA, SPAIN. Univ Nacl Autonoma Mexico, INST ASTRON, MEXICO CITY 04510, DF, MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP CSIC, INST ASTROFIS ANDALUCIA, AP CORREOS 3004, C SANCHO PANZA S-N, E-18080 GRANADA, SPAIN. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 31 TC 21 Z9 21 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 655 EP 662 DI 10.1086/173343 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100024 ER PT J AU VANCURA, O BLAIR, WP LONG, KS RAYMOND, JC HOLBERG, JB AF VANCURA, O BLAIR, WP LONG, KS RAYMOND, JC HOLBERG, JB TI A FAR-ULTRAVIOLET STUDY OF THE CYGNUS LOOP USING THE VOYAGER ULTRAVIOLET SPECTROMETERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (CYGNUS LOOP); RADIATION MECHANISM, MISCELLANEOUS; SHOCK WAVES; SUPERNOVA REMNANTS; ULTRAVIOLET, INTERSTELLAR ID RADIATIVE SHOCK-WAVE; SUPERNOVA REMNANT; EINSTEIN OBSERVATIONS; OPTICAL-EMISSION; X-RAY; TELESCOPE; DYNAMICS; FILAMENT; MODELS AB We have used the Voyager 1 and 2 Ultraviolet Spectrometers to study the far-ultraviolet emissions from different types of shock waves in the Cygnus Loop. In the southeast and northern parts of the supernova remnant (SNR), we have measured the O VI A1035 surface brightness from the main blast wave. This value is several times below the average and more than one order of magnitude below the peak O VI brightness in the SNR as measured with Voyager. A simple blast wave model appears able to reproduce the observations in the southeast and the northern parts of the Cygnus Loop but can only account for 10%-15% of the total O VI emission from the Cygnus Loop. The brightest O VI and C III lambda977 emission is found coincident with optical filamentation and X-ray enhancements in the northeast. We interpret the observations in the northeast in terms of nonradiative and incomplete shocks whose surface area rises in the optical filamentary regions. We conclude that the bulk of the O VI emission from the Cygnus Loop arises from optically bright clouds within which intermediate-velocity (200 + 50 km s-1) nonradiative and incomplete shocks are widespread. C1 JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,CTR ASTROPHYS SCI,BALTIMORE,MD 21218. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721. RP VANCURA, O (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 37 TC 10 Z9 10 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 663 EP 670 DI 10.1086/173344 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100025 ER PT J AU WHITNEY, BA CLAYTON, GC SCHULTELADBECK, RE CALVET, N HARTMANN, L KENYON, SJ AF WHITNEY, BA CLAYTON, GC SCHULTELADBECK, RE CALVET, N HARTMANN, L KENYON, SJ TI SPECTRUM OF THE INVISIBLE COMPANION OF Z-CANIS-MAJORIS REVEALED IN POLARIZED-LIGHT SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; BINARIES, CLOSE; POLARIZATION; STARS, INDIVIDUAL (Z-CANIS-MAJORIS); STARS, PRE-MAIN-SEQUENCE ID FU-ORIONIS OBJECTS; AE-BE STARS; HERBIG AE; INFRARED OBSERVATIONS; DISK ACCRETION; Z-CMA; WINDS; SPECTROPOLARIMETRY; NEBULOSITY; CLOUDS AB Optical spectropolarimetry of the FU Orionis variable Z CMa in 1991-1992 shows larger polarization in the emission lines than in the continuum. The intensity spectrum at this time has absorption lines with some narrow weak emission. The polarized flux spectrum appears similar to an intensity spectrum of Z CMa obtained in 1987 when it was approximately 0.9 mag brighter at V and showed strong emission lines. We argue that the primary component of the Z CMa binary is an emission line source, perhaps an Ae/Be star, that varies at V by 1-3 mag and was responsible for the 1987 outburst. The primary is mostly obscured from view by an asymmetrical distribution of dust which polarizes the light scattered into our line of sight. The 'secondary, a normal FU Orionis variable, is seen more directly, and therefore contributes a large amount of unpolarized flux, about 80% of the total optical flux. Most of the polarization is intrinsic to the system and oriented perpendicular to the jet axis. We propose that independent variations in the brightness of both sources are responsible for the appearance and disappearance of a narrow emission line spectrum on the broader FU Orionis absorption line spectrum. C1 UNIV COLORADO,CTR ASTROPHYS & SPACE ASTRON,BOULDER,CO 80309. CTR INVEST ASTRON,MERIDA 5101A,VENEZUELA. UNIV PITTSBURGH,DEPT PHYS & ASTRON,PITTSBURGH,PA 15260. KITT PEAK NATL OBSERV,TUCSON,AZ 85726. RP WHITNEY, BA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Kenyon, Scott/0000-0003-0214-609X NR 57 TC 39 Z9 39 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 687 EP 696 DI 10.1086/173347 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100028 ER PT J AU KIMURA, M DALGARNO, A CHANTRANUPONG, L LI, Y HIRSCH, G BUENKER, RJ AF KIMURA, M DALGARNO, A CHANTRANUPONG, L LI, Y HIRSCH, G BUENKER, RJ TI RATE COEFFICIENTS FOR CHARGE-TRANSFER OF HE+ WITH C SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES ID ENERGY; SN-1987A AB Rate coefficients for nonradiative charge transfer in collisions of He+ with C are calculated for temperatures up to 10,000 K. The rate coefficients increase from 2.8 x 10(-15) cm3 s-1 at 100 K to 6.8 x 10(-13) cm2 s-1 at 10,000 K. C1 BERG UNIV GESAMTHSCH WUPPERTAL,GESAMTH SCH,WUPPERTAL,W-5600 WUPPERTAL 1,GERMANY. ARGONNE NATL LAB,ARGONNE,IL 60439. RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. RP KIMURA, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 9 TC 15 Z9 15 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP 812 EP 814 DI 10.1086/173361 PN 1 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD971 UT WOS:A1993MD97100042 ER PT J AU HARMON, R ROSNER, R ZIRIN, H SPILLER, E GOLUB, L AF HARMON, R ROSNER, R ZIRIN, H SPILLER, E GOLUB, L TI THE CORONAL STRUCTURE ABOVE SUNSPOTS AND PORES SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUN, CORONA; SUN, MAGNETIC FIELDS; SUN, X-RAYS, GAMMA-RAYS; VIDEOTAPES ID RAY AB High-resolution X-ray observations of the solar corona have been used to study the structure above pores and small sunspots. We find that the lack of X-ray emission previously observed above large spot umbrae is also seen above pores. As is the case with large spots, the pores are surrounded by bright X-ray emitting structures. Using these data we argue that coronal heating requires magnetic field stressing from imposed motions internal to coronal flux bundles, rather than from displacement of the flux bundles. C1 UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. CALTECH,PASADENA,CA 91125. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP HARMON, R (reprint author), UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637, USA. NR 10 TC 10 Z9 10 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1993 VL 417 IS 2 BP L83 EP & DI 10.1086/187100 PN 2 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD972 UT WOS:A1993MD97200008 ER PT J AU MITROVICA, JX DAVIS, JL SHAPIRO, II AF MITROVICA, JX DAVIS, JL SHAPIRO, II TI CONSTRAINING PROPOSED COMBINATIONS OF ICE HISTORY AND EARTH RHEOLOGY USING VLBI DETERMINED BASE-LINE LENGTH RATES IN NORTH-AMERICA SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ADJUSTMENT AB We predict the present-day rates of change of the lengths of 19 North American baselines due to the glacial isostatic adjustment process. Contrary to previously published research, we find that the three-dimensional motion of each of the sites defining a base-line, rather than only the radial motions of these sites, needs to be considered to obtain an accurate estimate of the rate of change of the baseline length. Predictions are generated using a suite of Earth models and late Pleistocene ice histories; these include specific combinations of the two which have been proposed in the literature as satisfying a variety of rebound related geophysical observations from the North American region. A number of these published models are shown to predict rates which differ significantly from the VLBI observations. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MITROVICA, JX (reprint author), UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA. RI Davis, James/D-8766-2013 OI Davis, James/0000-0003-3057-477X NR 12 TC 30 Z9 30 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD NOV 5 PY 1993 VL 20 IS 21 BP 2387 EP 2390 DI 10.1029/93GL02043 PG 4 WC Geosciences, Multidisciplinary SC Geology GA MF829 UT WOS:A1993MF82900018 ER PT J AU CARLSTEAD, K BROWN, JL STRAWN, W AF CARLSTEAD, K BROWN, JL STRAWN, W TI BEHAVIORAL AND PHYSIOLOGICAL CORRELATES OF STRESS IN LABORATORY CATS SO APPLIED ANIMAL BEHAVIOUR SCIENCE LA English DT Article DE ACTH; CORTISOL; PREDICTABILITY; CARETAKING ROUTINE; HIDING BEHAVIOR; EXPLORATORY BEHAVIOR; CATS ID LUTEINIZING-HORMONE; GONADAL RESPONSE; OVARIAN-FUNCTION; ANIMAL-WELFARE; DOMESTIC CAT; FELIS-CATUS; DAIRY-COWS; PITUITARY; ADRENOCORTICOTROPIN; CORTISOL AB Sixteen domestic cats were used to investigate the pituitary-adrenal, pituitary-gonadal and behavioral consequences of an unpredictable handling and husbandry routine. After a 10-day baseline period of standard laboratory procedures, eight cats ('stressed cats', STR) were subjected to a 21-day period of altered caretaking characterized by irregular feeding and cleaning times, absence of talking and petting by humans, and daily unpredictable manipulations. Eight control cats (CON group) were maintained for 21 days on the standard caretaking schedule. Behavior was recorded on time-lapse video 24 h day-1, urine was collected daily for cortisol analyses, and hormone stimulation tests with synthetic adrenocorticotropic hormone (ACTH) and luteinizing hormone-releasing hormone (LHRH) were conducted before and after the 3-week treatment period. Results indicate that the STR cats were chronically stressed by the altered caretaking routine. Urinary cortisol concentrations were consistently elevated throughout the 3-week period, adrenal sensitivity to ACTH was enhanced and pituitary sensitivity to LHRH was reduced. Active exploratory and play behavior was suppressed, and STR cats spent more time awake/alert and attempting to hide. Hiding was negatively correlated with cortisol concentration and, therefore, may be an important behavior for coping with uncontrollable and unpredictable captive environments. These results indicate that qualitatively poor caretaking is a potent psychological stressor for confined cats that may eventually compromise reproduction through behavioral or physiological mechanisms. To promote well-being, caged cats should be provided with appropriate places for concealment. C1 NATL INST MENTAL HLTH,POOLESVILLE,MD 20837. RP CARLSTEAD, K (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 84 TC 135 Z9 141 U1 5 U2 61 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1591 J9 APPL ANIM BEHAV SCI JI Appl. Anim. Behav. Sci. PD NOV PY 1993 VL 38 IS 2 BP 143 EP 158 DI 10.1016/0168-1591(93)90062-T PG 16 WC Agriculture, Dairy & Animal Science; Behavioral Sciences; Veterinary Sciences SC Agriculture; Behavioral Sciences; Veterinary Sciences GA MJ860 UT WOS:A1993MJ86000004 ER PT J AU BOUCHET, FR STRAUSS, MA DAVIS, M FISHER, KB YAHIL, A HUCHRA, JP AF BOUCHET, FR STRAUSS, MA DAVIS, M FISHER, KB YAHIL, A HUCHRA, JP TI MOMENTS OF THE COUNTS DISTRIBUTION IN THE 1.2 JANSKY IRAS GALAXY REDSHIFT SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS ID INVARIANT MATTER DISTRIBUTION; DENSITY-FLUCTUATIONS; MASS DENSITY; STATISTICAL-ANALYSIS; EXPANDING UNIVERSE; ORDER CORRELATIONS; CFA; THERMODYNAMICS; HIERARCHY; VELOCITY AB We have measured the count probability distribution function (CPDF) in a series of 10 volume-limited sub-samples of a deep redshift survey of IRAS galaxies. The CPDF deviates significantly from both the Poisson and Gaussian limits in all but the largest volumes. We derive the volume-averaged 2-, 3-, 4-, and 5 point correlation functions from the moments of the CPDF and find them all to be reasonably well described by power laws. Weak systematic effects with the sample size provide evidence for stronger clustering of galaxies of higher luminosity on small scales. Nevertheless, remarkably tight relationships hold between the correlation functions of different order. In particular, the ''normalized'' skewness defined by the ratio S3 = xi3BAR/xi2(2)BAR varies at most weakly with scale in the range 0.1 < xi2BAR < 10. That is, S3 is close to constant (= 1.5 +/- 0.5) from weakly to strongly nonlinear scales. On small scales, this is consistent with previous determinations of the three-point correlation function zeta = xi3. On larger scales, this conforms with the hypothesis of the growth of observed structures by gravitational clustering of initially Gaussian density fluctuations. We similarly find that xi4BAR is proportional to the third power Of xi2BAR in the same range of xi2BAR, and there is weak evidence that xi5BAR is proportional to the fourth power of xi2BAR. Furthermore, we find that the void probability function obeys a scaling relation with density to great precision, in accord with the scale-invariance hypothesis (xi(N)BAR is-proportional-to xi2N-1BAR)). Double-counting cluster galaxies in order to match the cluster overdensities seen in optically selected samples of galaxies increases greatly the derived value Of S3 and S4, although the scaling between the correlations of different orders remains. Unfortunately, the relative sparseness of the IRAS sample precludes using it to make the most demanding tests of scale invariance, which rely on the overall shape of the CPDF at different scales. In this sparse limit, various models for the CPDF become degenerate and fit the IRAS data nearly equally well. Indeed, the CPDF is well fitted by both the negative binomial distribution, and the thermodynamical model of Saslaw & Hamilton, and to a somewhat lesser extent by the log-normal distribution. All three models fit the data poorly for the densest subsample of IRAS galaxies examined, but this may be more a reflection of finite volume effects than of the inadequacy of the models. C1 PRINCETON UNIV,INST ADV STUDY,PRINCETON,NJ 08540. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND. SUNY STONY BROOK,ASTRON PROGRAM,STONY BROOK,NY 11794. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP BOUCHET, FR (reprint author), INST ASTROPHYS PARIS,CNRS,98 BIS BLVD ARAGO,F-75014 PARIS,FRANCE. RI Bouchet, Francois/B-5202-2014 NR 75 TC 154 Z9 154 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1993 VL 417 IS 1 BP 36 EP 53 DI 10.1086/173289 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD103 UT WOS:A1993MD10300004 ER PT J AU SOKER, N AF SOKER, N TI EFFECTS OF CONVECTION ON PRESSURE WAVE EXCITATION IN COMMON ENVELOPES SO ASTROPHYSICAL JOURNAL LA English DT Article DE CONVECTION; PLANETARY SYSTEMS; STARS, AGB AND POST-AGB; STARS, MASS LOSS; STARS, OSCILLATIONS ID DOUBLE-CORE EVOLUTION; PLANETARY-NEBULAE; BINARY STARS AB We study the effect of the convective viscosity on p-waves propagating outward in star envelope. The main interest here is in p-waves which are excited by a low-mass secondary orbiting well inside the extended primary's envelope. These waves may influence the geometry of the mass loss from the envelope. We assume that the turbulent viscosity results from convective cells, with characteristic turnover time shorter by a factor of approximately 2pi than the oscillation period. We further assume a fully developed turbulence, and use the Kolmogoroff spectrum to describe the convective eddies. We find that the damping of outward-propagating p-waves in AGB stars' envelopes caused by convective viscosity is small. The inclusion of convective viscosity, therefore, does not alter the conclusions of the adiabatic calculation. The main result of the adiabatic calculation (presented in a previous paper) is that brown dwarfs, and possible Jupiter-like secondaries, can influence the mass loss geometry from AGB stars through p-waves excitation. C1 ORANIM UNIV,DIV MATH PHYS,IL-36910 TIVON,ISRAEL. RP SOKER, N (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 23 TC 7 Z9 7 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1993 VL 417 IS 1 BP 347 EP 350 DI 10.1086/173317 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD103 UT WOS:A1993MD10300032 ER PT J AU KOCHANEK, CS PIRAN, T AF KOCHANEK, CS PIRAN, T TI GRAVITATIONAL-WAVES AND GAMMA-RAY BURSTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA-RAYS; BURSTS, GRAVITATION, STARS; NEUTRON ID NEUTRON-STAR; BINARIES AB If the gamma-ray burst sources detected by GRO are coalescing binaries at cosmological distances there should be a coincident gravitational radiation signal. Using the GRBs rate we predict the gravitational radiation detection rate as a function of the gravitational wave strain at Earth. This method of predicting the rate avoids the large statistical uncertainties in the current estimates that are based on the three neutron star binaries containing pulsars found, so far, in the Galaxy. The brightest gamma-ray bursts should be accompanied by a gravitational pulse detectable by LIGO or VIRGO, and by using the bursts as triggers for LIGO/VIRGO their sensitivity can be improved by 50% and the detection rate increases by a factor of 3. LIGO/VIRGO must reach a strain sensitivity of 10(-20.7) h0 to detect one burst per decade, and a failure to find coincidences at a rate of one per year with a strain sensitivity of 10(-21.6) h0 will rule out the binary hypothesis. If they are detected as gravitational wave sources, the time delay between the gamma-rays and the gravitational waves will help to determine the burst mechanism, and the polarization of the gravitational waves will help to determine the burst geometry. C1 HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 24 TC 98 Z9 99 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1993 VL 417 IS 1 BP L17 EP L20 DI 10.1086/187083 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA MD104 UT WOS:A1993MD10400005 ER PT J AU CARPENTER, FL HIXON, MA RUSSELL, RW PATON, DC TEMELES, EJ AF CARPENTER, FL HIXON, MA RUSSELL, RW PATON, DC TEMELES, EJ TI INTERFERENCE ASYMMETRIES AMONG AGE-SEX CLASSES OF RUFOUS HUMMINGBIRDS DURING MIGRATORY STOPOVERS SO BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY LA English DT Article DE INTRASPECIFIC DOMINANCE; TERRITORIALITY; MIGRATION; STOPOVERS; HUMMINGBIRDS ID DARK-EYED JUNCOS; PRIOR RESIDENCE; DOMINANCE; SIZE; DEFENSE; TERRITORIALITY; DIMORPHISM AB Three age-sex classes of rufous hummingbirds (Selasphorus rufus) overlap temporally and defend feeding territories during migratory stopovers in the Sierra Nevada of California. We demonstrate that these classes differ in their ability to secure and maintain high-quality feeding territories for refueling, and that these differences result in differences in resource use. Data on acquisition of territories, territory characteristics, and responses of territory owners to intruders suggest that several mechanisms are involved in determining dominance, involving sex- and age-related differences in wing disc loading, coloration, and experience. We discuss the implications of these results for understanding intraspecific variation in migration strategies. C1 OREGON STATE UNIV,DEPT ZOOL,CORVALLIS,OR 97331. UNIV ADELAIDE,DEPT ZOOL,ADELAIDE,SA 5001,AUSTRALIA. SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. RP CARPENTER, FL (reprint author), UNIV CALIF IRVINE,DEPT ECOL & EVOLUT BIOL,IRVINE,CA 92717, USA. NR 52 TC 37 Z9 37 U1 2 U2 10 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5443 J9 BEHAV ECOL SOCIOBIOL JI Behav. Ecol. Sociobiol. PD NOV PY 1993 VL 33 IS 5 BP 297 EP 304 PG 8 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA MK035 UT WOS:A1993MK03500002 ER PT J AU CARPENTER, FL HIXON, MA TEMELES, EJ RUSSELL, RW PATON, DC AF CARPENTER, FL HIXON, MA TEMELES, EJ RUSSELL, RW PATON, DC TI EXPLOITATIVE COMPENSATION BY SUBORDINATE AGE-SEX CLASSES OF MIGRANT RUFOUS HUMMINGBIRDS SO BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY LA English DT Article DE INTRASPECIFIC DOMINANCE; FORAGING ECOLOGY; MIGRATION; STOPOVERS; HUMMINGBIRDS ID PARUS-MAJOR; DIMORPHISM; EVOLUTION; SIZE; TIME; ORGANIZATION; COMPETITION; ENERGETICS; MIGRATION; DOMINANCE AB The three age-sex classes of rufous hummingbirds (Selasphorus rufus) that directly interact on southward migratory stopovers in our California study system differ in territorial ability and resource use. Immature males are behaviorally dominant to adult and immature females and defend the richest territories. Here, we test the hypothesis that the territorially subordinate age-sex classes compensate exploitatively for their exclusion from rich resources. Our results show that females were able to accumulate energy stores at rates comparable to males despite their subordinate territorial status. Territorial females gained body mass at the same rate and in the same pattern as males, and resumed migration at the same body masses. Moreover, during periods when birds were nonterritorial and used dispersed resources, adult and immature females maintained or gained body mass, whereas immature males lost mass. We suggest that females may be energetically compensated by (1) lower costs of flight incurred during foraging and defense, resulting from their lower wing disc loading, and (2) greater success at robbing nectar from rich male territories, resulting from duller coloration (immature females), experience (adult females), and, possibly, hormonal differences. In the future, experiments will be necessary to distinguish the various hypotheses about the mechanisms involved in compensation. C1 OREGON STATE UNIV,DEPT ZOOL,CORVALLIS,OR 97331. SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. UNIV ADELAIDE,DEPT ZOOL,ADELAIDE,SA 5001,AUSTRALIA. RP CARPENTER, FL (reprint author), UNIV CALIF IRVINE,DEPT ECOL & EVOLUT BIOL,IRVINE,CA 92717, USA. NR 65 TC 35 Z9 35 U1 1 U2 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5443 J9 BEHAV ECOL SOCIOBIOL JI Behav. Ecol. Sociobiol. PD NOV PY 1993 VL 33 IS 5 BP 305 EP 312 PG 8 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA MK035 UT WOS:A1993MK03500003 ER PT J AU EBERHARD, WG GUZMANGOMEZ, S CATLEY, KM AF EBERHARD, WG GUZMANGOMEZ, S CATLEY, KM TI CORRELATION BETWEEN SPERMATHECAL MORPHOLOGY AND MATING SYSTEMS IN SPIDERS SO BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY LA English DT Article DE SPERM PRECEDENCE; MATING SYSTEM; SPERMATHECAL MORPHOLOGY; ARACHNIDA ID LINYPHIA-LITIGIOSA LINYPHIIDAE; MULTIPLE PATERNITY; SPERM COMPETITION; 1ST MATE; ARANEAE; SALTICIDAE; PRECEDENCE; EVOLUTION; INSECTS C1 UNIV COSTA RICA,ESCUELA BIOL,SAN JOSE,COSTA RICA. UNIV NACL AUTONOMA MEXICO,CTR ECOL,MEXICO CITY 04510,DF,MEXICO. WESTERN CAROLINA UNIV,DEPT BIOL,CULLOWHEE,NC. RP EBERHARD, WG (reprint author), UNIV COSTA RICA,SMITHSONIAN TROP RES INST,CIUDAD UNIV,SAN JOSE,COSTA RICA. NR 33 TC 65 Z9 66 U1 0 U2 12 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0024-4066 J9 BIOL J LINN SOC JI Biol. J. Linnean Soc. PD NOV PY 1993 VL 50 IS 3 BP 197 EP 209 PG 13 WC Evolutionary Biology SC Evolutionary Biology GA MV676 UT WOS:A1993MV67600003 ER PT J AU TYLER, JC JOHNSON, GD BROTHERS, EB TYLER, DM SMITH, CL AF TYLER, JC JOHNSON, GD BROTHERS, EB TYLER, DM SMITH, CL TI COMPARATIVE EARLY-LIFE HISTORIES OF WESTERN ATLANTIC SQUIRRELFISHES (HOLOCENTRIDAE) - AGE AND SETTLEMENT OF RHYNCHICHTHYS, MEEKI, AND JUVENILE STAGES SO BULLETIN OF MARINE SCIENCE LA English DT Article ID FISHES; REEF AB Fishes of the family Holocentridae have a morphologically distinctive postlarval ''rhynchichthys'' stage characterized by extensive head spination, including a prominent serrate rostral spine. In most species the rhynchichthys physiognomy persists until settlement, which occurs within a size range of about 30-50 mm SL. The two species of Holocentrus have a uniquely protracted pelagic period during which they transform from the rhynchichthys at about 40 mm SL to a distinctive, unornamented, and relatively streamlined prejuvenile ''meeki'' stage that may reach 74 mm SL prior to settlement. Analysis of daily growth increments in lapilli of recently settled juvenile and adult holocentrids confirms that the pelagic stages of H. ascensionis and H. rufus grow more rapidly and settle at significantly greater ages and larger sizes than other holocentrids. A microstructural transition zone in the otoliths of these two species probably corresponds to the rhynchichthys-meeki morphological transformation of these pelagic stages. In other holocentrids examined a similar microstructural transition corresponds to the rhynchichthys-juvenile morphological transformation associated with settlement onto reefs. The average age and size of small juveniles of H. rufus collected at their earliest appearance during censuses of shallow reefs was 67 days and 66 mm SL, but the average pretransition increments in their lapilli was only 44. Limited data for H. ascensionis are similar, but differ in average age (59 days) and size (56 mm SL) at settlement and number of pretransition increments (48). The size of specimens found in museum collections also substantiates that H. rufus is larger at settlement (and has a larger maximum size meeki stage) than H. ascensionis. The two meeki stage specimens for which we have otolith data (for H. rufus, both slightly less than 50 mm SL) lack the expected transition mark. However, their ages at capture (38 and 43 days) suggest that they are newly transformed from the rhynchichthys stage, and marginal transition marks are difficult to identify. Daily growth increments were validated in one meeki stage H. rufus and two rhynchichthys stage Sargocentron coruscus that were maintained, respectively, for five and nine days in aquaria after strontium infusion of their otoliths. The rapid morphological transformation of the meeki stage into a benthic juvenile within two days of capture, including overnight change in coloration from blue above and silver below to orangish red with pale stripes, is described. C1 EFS CONSULTANTS,ITHACA,NY 14850. SMITHSONIAN INST PRESS,WASHINGTON,DC 20560. AMER MUSEUM NAT HIST,NEW YORK,NY 10024. RP TYLER, JC (reprint author), NATL MUSEUM NAT HIST,WASHINGTON,DC 20560, USA. NR 29 TC 14 Z9 15 U1 1 U2 4 PU ROSENSTIEL SCH MAR ATMOS SCI PI MIAMI PA 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 SN 0007-4977 J9 B MAR SCI JI Bull. Mar. Sci. PD NOV PY 1993 VL 53 IS 3 BP 1126 EP 1150 PG 25 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA MX459 UT WOS:A1993MX45900013 ER PT J AU STOUFFER, PC BIERREGAARD, RO AF STOUFFER, PC BIERREGAARD, RO TI SPATIAL AND TEMPORAL ABUNDANCE PATTERNS OF RUDDY QUAIL-DOVES (GEOTRYGON MONTANA) NEAR MANAUS, BRAZIL SO CONDOR LA English DT Article DE AMAZONIAN BRAZIL; GEOTRYGON MONTANA; MIGRATION; RAINFALL; RUDDY QUAIL-DOVE; SEASONAL MOVEMENTS ID COSTA-RICA; TROPICAL WET; BIRDS; UNDERSTORY; HABITATS; FORESTS AB We analyzed patterns of abundance of Ruddy Quail-Doves (Geotrygon montana) based on 12 years of mist-net data (457 captures) from terra firme forest near Manaus in central Amazonian Brazil. Unlike most understory birds at the study site, G. montana varied greatly in abundance. Quail-doves disappeared for months and then reappeared, usually during the wet season. In some months they became one of the most frequently netted birds. Quail-doves avoided isolated forest fragments of one ha, although abundance did not differ among fragments of 10 ha, 100 ha, and continuous forest. Peak abundance varied among years, as did the timing of peak abundance. In general, the annual pattern of quail-dove abundance was correlated with the annual rainfall pattern. Considering all 12 years of data, however, quail-dove abundance during a given three-month period was not correlated with rainfall during that period, but with rainfall in the same period in the previous year. No quail-doves were recaptured more than a few weeks part; thus individual birds did not return to the same site from year to year. Since quail-doves feed mainly on fallen fruit, these results suggest that they may range over wide areas to exploit regional differences in fruit production. C1 SMITHSONIAN INST,BIODIVERSITY PROGRAMS,WASHINGTON,DC 20560. NR 44 TC 29 Z9 31 U1 0 U2 5 PU COOPER ORNITHOLOGICAL SOC PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0010-5422 J9 CONDOR JI Condor PD NOV PY 1993 VL 95 IS 4 BP 896 EP 903 DI 10.2307/1369427 PG 8 WC Ornithology SC Zoology GA MK148 UT WOS:A1993MK14800012 ER PT J AU GREENBERG, R NIVEN, DK HOPP, S BOONE, C AF GREENBERG, R NIVEN, DK HOPP, S BOONE, C TI FRUGIVORY AND COEXISTENCE IN A RESIDENT AND A MIGRATORY VIREO ON THE YUCATAN PENINSULA SO CONDOR LA English DT Article DE VIREO; FRUGIVORY; NEOTROPICAL MIGRANT; FORAGING; AGGRESSION ID GRAY AB The White-eyed Vireo (Vireo griseus) and the Mangrove Vireo (V. pallens) are two of the most common species of insectivorous bird on the Yucatan Peninsula. Mangrove Vireo pairs maintain year-long territories primarily in scrub, whereas individual White-eyed Vireos defend territories in a broad range of terrestrial habitats. The two species show a strong reciprocal distribution along a successional gradient from regenerating pasture and old field to mature dry forest. Within second growth scrub, White-eyed Vireos are primarily associated with patches of trees. Despite minor morphological differences typical of migrant-resident comparisons, we found no significant differences in the rates of different locomotory movement, in the relative proportion of attack type used, nor in foraging substrate. The major foraging differences were a lower reduced attack rate and greater use of fruit (primarily Bursera simaruba) in the White-eyed Vireo. Playback experiments failed to draw significant interspecific responses to song playback and elicited weak responses to conspecific and heterospecific chatter calls. Simultaneous call-in experiments and opportunistic observations failed to provide evidence of interspecific aggression. White-eyed Vireos, however, consistently chased Mangrove Vireos out of fruiting Bursera. We hypothesize that the extensive use of Bursera fruit allows White-eyed Vireos to over-winter in mature forest on the Yucatan Peninsula, a habitat that apparently cannot support breeding by vireos in the White-eyed Vireo complex. C1 UNIV ILLINOIS,DEPT ECOL ETHOL & EVOLUT,CHAMPAIGN,IL 61820. EMORY & HENRY COLL,DEPT PSYCHOL,EMORY,VA 24327. RP GREENBERG, R (reprint author), SMITHSONIAN MIGRATORY BIRD CTR,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 40 TC 13 Z9 13 U1 0 U2 4 PU COOPER ORNITHOLOGICAL SOC PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0010-5422 J9 CONDOR JI Condor PD NOV PY 1993 VL 95 IS 4 BP 990 EP 999 DI 10.2307/1369434 PG 10 WC Ornithology SC Zoology GA MK148 UT WOS:A1993MK14800019 ER PT J AU RAND, H AF RAND, H TI ICON - STUDIES IN THE HISTORY OF AN IDEA - BARASCH,M SO HISTORY OF EUROPEAN IDEAS LA English DT Book Review RP RAND, H (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER ART,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-6599 J9 HIST EUR IDEA JI Hist. European Ideas PD NOV PY 1993 VL 17 IS 6 BP 790 EP 791 DI 10.1016/0191-6599(93)90105-Y PG 2 WC Philosophy SC Philosophy GA MN724 UT WOS:A1993MN72400013 ER PT J AU GOODWAY, M LEYES, RA AF GOODWAY, M LEYES, RA TI BACK TO KITTY-HAWK - INVESTIGATING THE 1ST AIRCRAFT ALUMINUM SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article C1 SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,DEPT AERONAUT,WASHINGTON,DC 20560. NR 25 TC 1 Z9 1 U1 1 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD NOV PY 1993 VL 45 IS 11 BP 16 EP & PG 0 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA MF722 UT WOS:A1993MF72200002 ER PT J AU ROTH, TL DONOGHUE, AM BYERS, AP WILDT, DE MUNSON, L AF ROTH, TL DONOGHUE, AM BYERS, AP WILDT, DE MUNSON, L TI INFLUENCE OF OVIDUCTAL CELL MONOLAYER COCULTURE AND THE PRESENCE OF CORPORA-HEMORRHAGICA AT THE TIME OF OOCYTE ASPIRATION ON GAMETE INTERACTION IN-VITRO IN THE DOMESTIC CAT SO JOURNAL OF ASSISTED REPRODUCTION AND GENETICS LA English DT Note RP ROTH, TL (reprint author), SMITHSONIAN INST,DEPT REPROD PHYSIOL,NATL ZOOL PK,WASHINGTON,DC 20008, USA. FU NICHD NIH HHS [HD 23853] NR 0 TC 13 Z9 14 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 1058-0468 J9 J ASSIST REPROD GEN JI J. Assist. Reprod. Genet. PD NOV PY 1993 VL 10 IS 8 BP 523 EP 529 DI 10.1007/BF01204363 PG 7 WC Genetics & Heredity; Obstetrics & Gynecology; Reproductive Biology SC Genetics & Heredity; Obstetrics & Gynecology; Reproductive Biology GA NQ248 UT WOS:A1993NQ24800006 PM 8081090 ER PT J AU FERRARI, FD AF FERRARI, FD TI EXCEPTIONS TO THE RULE OF DEVELOPMENT THAT ANTERIOR IS OLDER AMONG SERIALLY HOMOLOGOUS SEGMENTS OF POSTMAXILLIPEDAL LEGS IN COPEPODS SO JOURNAL OF CRUSTACEAN BIOLOGY LA English DT Article ID RAMAL SEGMENTS; CALANOIDA; NUMBERS AB A survey of more than 250 species of copepods shows about 4% of the rami on postmaxillipedal legs have a segment that is formed later in development, and therefore is younger, than homologous segments on legs located on more posterior body somites. These younger segments are exceptions to the general rule of development that, among serially homologous segments, those found on anterior legs are older than their homologues on more posterior legs. Exceptions to this rule occur more frequently on leg 1 than expected, and appear to have originated more than once during copepod evolution. These younger segments more often are added during the terminal adult molt, which is an unusual developmental pattern for copepods. RP FERRARI, FD (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 13 TC 9 Z9 10 U1 0 U2 0 PU CRUSTACEAN SOC PI SAN ANTONIO PA 840 EAST MULBERRY, SAN ANTONIO, TX 78212 SN 0278-0372 J9 J CRUSTACEAN BIOL JI J. Crustac. Biol. PD NOV PY 1993 VL 13 IS 4 BP 763 EP 768 DI 10.2307/1549106 PG 6 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA MF524 UT WOS:A1993MF52400014 ER PT J AU MANNING, RB AF MANNING, RB TI EPULOTHERES ANGELAE, NEW GENUS, NEW SPECIES, A PINNOTHERID CRAB FROM THE CARIBBEAN SEA (DECAPODA, PINNOTHERIDAE) SO JOURNAL OF CRUSTACEAN BIOLOGY LA English DT Article ID BRACHYURA AB The monotypic genus Epulotheres is erected with E. angelae, new species, from Barbados, as its type species. Epulotheres resembles Ostracotheres Milne Edwards, 1853, and Calyptraeotheres Campos, 1990, in having a 2-segmented palp on the third maxilliped. It differs in that feature from most species of Pinnotheres Bosc, 1802, sensu lato, and other pinnotherid genera which have a 3-segmented palp on the third maxilliped. Egulotheres differs from Ostracotheres in being much smaller, in having a hexagonal rather than subcircular carapace, and in having a much slenderer and shorter propodus on the third maxilliped, with its apex rounded and narrowed rather than having a broad, spatulate propodus that is longer than the carpus. Epulotheres differs from species of Calyptraeotheres in lacking both sharp lateral edges and anterior longitudinal sulci on the carapace. RP MANNING, RB (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 25 TC 8 Z9 9 U1 0 U2 0 PU CRUSTACEAN SOC PI SAN ANTONIO PA 840 EAST MULBERRY, SAN ANTONIO, TX 78212 SN 0278-0372 J9 J CRUSTACEAN BIOL JI J. Crustac. Biol. PD NOV PY 1993 VL 13 IS 4 BP 801 EP 804 DI 10.2307/1549110 PG 4 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA MF524 UT WOS:A1993MF52400018 ER PT J AU OWSLEY, DW AF OWSLEY, DW TI IDENTIFICATION OF THE FRAGMENTARY, BURNED REMAINS OF 2 US JOURNALISTS 7 YEARS AFTER THEIR DISAPPEARANCE IN GUATEMALA SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE PHYSICAL ANTHROPOLOGY; HUMAN IDENTIFICATION AB The contribution of a physical anthropologist to a forensic investigation is generally associated with analysis of skeletal remains in a laboratory. This case, which deals with the identification of two U.S. journalists who disappeared in Guatemala in March 1985, shows that the observations of a physical anthropologist in the field-at the site where the skeletal remains are located-can be essential to the success of an investigation. In this case, there was a deliberate attempt to mislead the investigators, but the physical anthropologists on the team discovered the deception. Subsequently, when they were taken to the actual cremation site, they obtained bone fragments and teeth that permitted identification of the victims. For one individual, the unusual morphology of the frontal sinus made positive identification possible. Comparison of premortem dental X-rays with teeth found at the site resulted in positive identification of the second individual. RP OWSLEY, DW (reprint author), SMITHSONIAN INST,NATIONAL MUSEUM NAT HIST,DEPT ANTHROPOL,MAIL STOP 112,WASHINGTON,DC 20560, USA. NR 6 TC 15 Z9 16 U1 0 U2 5 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD NOV PY 1993 VL 38 IS 6 BP 1372 EP 1382 PG 11 WC Medicine, Legal SC Legal Medicine GA MH369 UT WOS:A1993MH36900019 PM 8263480 ER PT J AU HOELZEL, AR HALLEY, J OBRIEN, SJ CAMPAGNA, C ARNBOM, T LEBOEUF, B RALLS, K DOVER, GA AF HOELZEL, AR HALLEY, J OBRIEN, SJ CAMPAGNA, C ARNBOM, T LEBOEUF, B RALLS, K DOVER, GA TI ELEPHANT SEAL GENETIC-VARIATION AND THE USE OF SIMULATION-MODELS TO INVESTIGATE HISTORICAL POPULATION BOTTLENECKS SO JOURNAL OF HEREDITY LA English DT Article ID MITOCHONDRIAL-DNA AB Because the northern elephant seal (Mirounga angustirostrus) was heavily exploited during the 19th century, it experienced an extreme population bottleneck. Since then, under legislative protection in the United States and Mexico, northern elephant seals have recovered dramatically in number, although their genomic diversity was greatly reduced, apparently as a consequence of the bottleneck. In this study we investigated DNA sequence diversity in two mtDNA regions (the control region and 16S RNA) and found low genetic variation in the northern elephant seal: there were only two control region haplotypes (sequence difference = 1%), which was consistent with an extreme founder event in the recent history of the northern species. We also reaffirmed the lack of allozyme diversity in this species. In contrast, the Southern elephant seal (M. leonina), which though similarly exploited never fell below 1,000 animals, had 23 control region mtDNA haplotypes (average sequence difference = 2.3%). To investigate the extent of the founder event in the northern elephant seal we devised a simulation model based on extensive demographic data. This allowed a statistical analysis of the likely outcome of bottlenecks of different size and duration. Given these historical data, our results indicate (within 95% confidence) a bottleneck of less than 30 seals and 20-year duration, or, if hunting was the primary pressure on the population, a single-year bottleneck of less than 20 seals. C1 IMPERIAL COLL,NERC,CTR POPULAT BIOL,ASCOT,BERKS,ENGLAND. DEPT GENET,CAMBRIDGE,CAMBS,ENGLAND. CTR NACL PATAGON,PUERTO MADRYN,CHUBUT,ARGENTINA. BRITISH ANTARCTIC SURVEY,CAMBRIDGE,ENGLAND. STOCKHOLM UNIV,DEPT ZOOL,STOCKHOLM,SWEDEN. UNIV CALIF SANTA CRUZ,DEPT BIOL,SANTA CRUZ,CA 95064. UNIV CALIF SANTA CRUZ,INST MARINE SCI,SANTA CRUZ,CA 95064. SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. RP HOELZEL, AR (reprint author), NCI,VIRAL CARCINOGENESIS LAB,FREDERICK,MD 21702, USA. OI Campagna, Claudio/0000-0002-7971-5062 NR 29 TC 158 Z9 167 U1 5 U2 46 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 SN 0022-1503 J9 J HERED JI J. Hered. PD NOV-DEC PY 1993 VL 84 IS 6 BP 443 EP 449 PG 7 WC Evolutionary Biology; Genetics & Heredity SC Evolutionary Biology; Genetics & Heredity GA MM565 UT WOS:A1993MM56500004 PM 7505788 ER EF