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Articles 1 - 30 of 120
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South Carolina School District Profile Data, 1997-98, A Companion Volume To: Education And Greenwood County, A Benchmarking Tool, 1999 December 31, Louis R. Lanier, Ellen Weeks Saltzman
South Carolina School District Profile Data, 1997-98, A Companion Volume To: Education And Greenwood County, A Benchmarking Tool, 1999 December 31, Louis R. Lanier, Ellen Weeks Saltzman
Publications
No abstract provided.
Public Education And Greenwood County: A Benchmarking Tool, 1999 December 31, Louis R. Lanier, Ellen Weeks Saltzman
Public Education And Greenwood County: A Benchmarking Tool, 1999 December 31, Louis R. Lanier, Ellen Weeks Saltzman
Publications
No abstract provided.
(Teff,Log G,[Fe/H]) Classification Of Low-Resolution Stellar Spectra Using Artificial Neural Networks, Shawn Snider, Yuan Qu, Carlos Allende Prieto, Ted Von Hippel, Timothy C. Beers, Christopher Sneden, David L. Lambert, Silvia Rossi
(Teff,Log G,[Fe/H]) Classification Of Low-Resolution Stellar Spectra Using Artificial Neural Networks, Shawn Snider, Yuan Qu, Carlos Allende Prieto, Ted Von Hippel, Timothy C. Beers, Christopher Sneden, David L. Lambert, Silvia Rossi
Publications
New generation large-aperture telescopes, multi-object spectrographs, and large format detectors are making it possible to acquire very large samples of stellar spectra rapidly. In this context, traditional star-by-star spectroscopic analysis are no longer practical. New tools are required that are capable of extracting quickly and with reasonable accuracy important basic stellar parameters coded in the spectra. Recent analyses of Artificial Neural Networks (ANNs) applied to the classification of astronomical spectra have demonstrated the ability of this concept to derive estimates of temperature and luminosity. We have adapted the back-propagation ANN technique developed by von Hippel et al. (1994) to predict …
Coupling Of Spin Waves With Charge- And Spin Density Excitations In Spin-Polarized Quantum Wells, D C. Marinescu, J J. Quinn
Coupling Of Spin Waves With Charge- And Spin Density Excitations In Spin-Polarized Quantum Wells, D C. Marinescu, J J. Quinn
Publications
The coupling of spin waves with charge- and spin-density waves is shown to be induced by a spin-dependent interaction in a quantum well, which is spin polarized by a dc magnetic field at an angle to the symmetry axis. The mixing of the plasmonic and magnonic modes, which occurs for both intra- and intersubband transitions, depends on the coupling constant of the spin-spin interaction, the tilt angle , and the initial spin polarization . ͓S0163-1829͑99͒08247-8͔
Search For X-Ray Afterglows From Gamma-Ray Bursts In The Rass, Dieter H. Hartmann, J. Greiner, W. Voges, T. Boller, R. Schwarz, S. V. Zharykov
Search For X-Ray Afterglows From Gamma-Ray Bursts In The Rass, Dieter H. Hartmann, J. Greiner, W. Voges, T. Boller, R. Schwarz, S. V. Zharykov
Publications
We report on a search for X-ray afterglows from gamma-ray bursts using the ROSAT all-sky survey (RASS) data. If the emission in the soft X-ray band is signif-icantly less beamed than in the gamma-ray band, we expect to detect many afterglows in the RASS. Our search procedure generated 23 afterglow candidates, where about 4 detections are predicted. Follow-up spectroscopy of several counterpart candidates strongly suggests a flare star origin of the RASS events in many, if not all, cases. Given the small number of events we conclude that the data are consistent with comparable beaming angles in the X-ray and …
The Economic Situation, 1999 December, Bruce Yandle
The Economic Situation, 1999 December, Bruce Yandle
Publications
Quarterly report on the economic situation of the United States and South Carolina.
Wiyn Open Cluster Study. Ii. Ubvri Ccd Photometry Of The Open Cluster Ngc 188, Ata Sarajedini, Ted Von Hippel, Vera Kozhurina-Platais, Pierre Demarque
Wiyn Open Cluster Study. Ii. Ubvri Ccd Photometry Of The Open Cluster Ngc 188, Ata Sarajedini, Ted Von Hippel, Vera Kozhurina-Platais, Pierre Demarque
Publications
We present high-precision UBVRI CCD photometry of the old open cluster NGC 188. Our color-magnitude diagram extends from near the red giant branch tip to as faint as ~5 mag below the main-sequence turnoff. From an analysis of these data along with published photometry for M67, we draw the following conclusions: (1) From the UBV two-color diagram, we find a reddening of E(B ̶ V) = 0.04 ± 0.02 for M67 and E(B ̶ V) = 0.09 ± 0.02 for NGC 188. (2) Based on main-sequence fitting to solar abundance isochrones, the distance moduli …
Discovery Of The Optical Transient Of Grb 990308, Bradley E. Schaefer, J. A. Snyder, J. Hernandez, B. Roscherr, M. Deng, N. Ellman, C. Bailyn, A. Rengstorf, D. Smith, Dieter H. Hartmann
Discovery Of The Optical Transient Of Grb 990308, Bradley E. Schaefer, J. A. Snyder, J. Hernandez, B. Roscherr, M. Deng, N. Ellman, C. Bailyn, A. Rengstorf, D. Smith, Dieter H. Hartmann
Publications
The optical transient of the faint gamma-ray burst GRB 990308 was detected by the QUEST camera on the Venezuelan 1 m Schmidt telescope starting 3.28 hr after the burst. Our photometry gives V= 18.32 ± 0.07, R = 18.14 ± 0. 06, B =18.65, and R=18.22 ± 0.05 for times ranging from 3.28 to 3.47 hr after the burst. The colors correspond to a spectral slope of close to f ∝ v^1/3 . Within the standard synchrotron fireball model, this rquires that the external medium be less dense than 10^4 cm^-3, the electrons contain more than 20% of the shock …
Clean Up Your Act, Alan Ramo
Cold Tolerance And Fatty Acid Composition Of Striped Bass, White Bass, And Their Hybrids, Anita M. Kelly, Christopher C. Kohler
Cold Tolerance And Fatty Acid Composition Of Striped Bass, White Bass, And Their Hybrids, Anita M. Kelly, Christopher C. Kohler
Publications
Cold tolerance of striped bass Morone saxatilis, white bass M. chrysops, palmetto bass (female striped bass × male white bass), and sunshine bass (female white bass × male striped bass) were compared under controlled laboratory conditions. Two groups of each taxon were acclimated at 20°C in a recirculating-water system housed in an environmental chamber and were fed either a natural or prepared diet for 84 d. The fatty acid composition of the natural diet was 13% more unsaturated than that of the prepared diet. Fish fed the natural diet subsequently had unsaturated:saturated fatty acid ratios 10–25% higher than …
Advancing Tolerance And Equality Using State Constitutions: Are The Boy Scouts Prepared?, Rachel A. Van Cleave
Advancing Tolerance And Equality Using State Constitutions: Are The Boy Scouts Prepared?, Rachel A. Van Cleave
Publications
The traditional United States Supreme Court analysis for determining whether a group may exclude people from membership on the basis of sexual orientation involves a series of either/or choices. For example, in the context of the exclusion of homosexuals by the Boy Scouts of America, one issue is whether the Boy Scouts is a "public accommodation.' Another issue is whether homosexuals constitute a protected class. This Article argues that independent state constitutional analysis of this issue provides an opportunity to avoid the narrowing effects of the traditional dichotomies, and that courts should directly consider the interests of the parties. In …
Welfare Reform In South Carolina: A Preliminary Analysis, 1999 October, Curtis J. Simon
Welfare Reform In South Carolina: A Preliminary Analysis, 1999 October, Curtis J. Simon
Publications
No abstract provided.
The Economic Situation, 1999 October, Bruce Yandle
The Economic Situation, 1999 October, Bruce Yandle
Publications
Quarterly report on the economic situation of the United States and South Carolina.
Enhanced Biotransformation Of Carbon Tetrachloride By Acetobacterium Woodii Upon Addition Of Hydroxocobalamin And Fructose, Syed A. Hashsham, David L. Freedman
Enhanced Biotransformation Of Carbon Tetrachloride By Acetobacterium Woodii Upon Addition Of Hydroxocobalamin And Fructose, Syed A. Hashsham, David L. Freedman
Publications
The objective of this study was to evaluate the effect of hydroxocobalamin (OH-Cbl) on transformation of high concentrations of carbon tetrachloride (CT) by Acetobacterium woodii (ATCC 29683). Complete transfor-mation of 470 M (72 mg/liter [aqueous]) CT was achieved by A. woodii within 2.5 days, when 10 M OH-Cbl was added along with 25.2 mM fructose. This was approximately 30 times faster than A. woodii cultures (live or autoclaved) and medium that did not receive OH-Cbl and 5 times faster than those controls that did receive OH-Cbl, but either live A. woodii or fructose was missing. CT transformation in treatments with …
Stress Distributions In Flowing Aggregated Colloidal Suspensions, Leo Silbert, R S. Farr, J R. Melrose, R C. Ball
Stress Distributions In Flowing Aggregated Colloidal Suspensions, Leo Silbert, R S. Farr, J R. Melrose, R C. Ball
Publications
Simulations of the flow of concentrated aggregated colloidal systems, at the particulate level, are used to investigate the distribution of stresses in the shear-thinning regime. It is found that the distribution of shear stress carried by interparticle bonds decays approximately exponentially at large stresses, but with a double-exponential distribution for values of positive stress. The microstructural mechanisms associated with large stresses are manifested in clusters which dominate the positive contribution to the stress in the system. Towards the end of shear thinning the highest forces occur along bonds defining rods of particles aligned approximately along the flow-compression direction. We propose …
Evolution Of The Lithium Abundances Of Solar-Type Stars. Ix. High-Resolution Spectroscopy Of Low-Mass Stars In Ngc 2264, David R. Soderblom, Jeremy R. King, Lionel Siess, Burton F. Jones, Debra Fischer
Evolution Of The Lithium Abundances Of Solar-Type Stars. Ix. High-Resolution Spectroscopy Of Low-Mass Stars In Ngc 2264, David R. Soderblom, Jeremy R. King, Lionel Siess, Burton F. Jones, Debra Fischer
Publications
We have obtained Keck HIRES spectra of 35 objects in the pre–main-sequence cluster NGC 2264 in order to determine their radial velocities, rotation rates, activity levels, and Li abundances. Our precise radial velocities indicate that the eight objects we observed that lie below a 5 Myr isochrone are nonmembers. This means that the age spread within NGC 2264 is only about 4 Myr, a factor of 2 less than found previously, although this is a lower limit to the true age spread because star formation is still taking place in the cluster. After correction for non-LTE effects, our Li abundances …
A Review Of Automated Stellar Spectral Classification And Surveys, Ted Von Hippel, Coryn A.L. Bailer-Jones
A Review Of Automated Stellar Spectral Classification And Surveys, Ted Von Hippel, Coryn A.L. Bailer-Jones
Publications
Modern spectroscopic surveys and automated classifiers are becoming so inextricably linked that it is difficult even to summarize one without discussing the other. Some of the automated classifiers are being built because of current analysis needs, though with a clear anticipation of future, larger surveys. Other automated classifiers are being designed specifically for future surveys. Automated classifiers may be applied to databases already in hand, to real-time analysis at the telescope, or one day to on-board satellite analysis where the raw data are too bulky to save and transmit. In addition, many current spectroscopic surveys target galaxies. These surveys may …
Ursinus College 1970-1976: A Chronicle Of Selected Events, Richard P. Richter
Ursinus College 1970-1976: A Chronicle Of Selected Events, Richard P. Richter
Publications
No abstract provided.
Land Prices And The Changing Geography Of Southern Row-Crop Agriculture, 1999 July, James C. Hite 1941-, Emily J. Terrell, Kang Shou Lu
Land Prices And The Changing Geography Of Southern Row-Crop Agriculture, 1999 July, James C. Hite 1941-, Emily J. Terrell, Kang Shou Lu
Publications
No abstract provided.
The Economic Situation, 1999 July, Bruce Yandle
The Economic Situation, 1999 July, Bruce Yandle
Publications
Quarterly report on the economic situation of the United States and South Carolina.
Observations And Interpretation Of Gravity Wave Induced Fluctuations In The O I (557.7 Nm) Airglow, G. Schubert, R. L. Walterscheid, Michael P. Hickey Ph.D., C. A. Tepley
Observations And Interpretation Of Gravity Wave Induced Fluctuations In The O I (557.7 Nm) Airglow, G. Schubert, R. L. Walterscheid, Michael P. Hickey Ph.D., C. A. Tepley
Publications
Observations of fluctuations in the intensity and temperature of the O I (557.7 nm) airglow taken at Arecibo in 1989 are reported and interpreted on the assumption that they are caused by gravity waves propagating through the emission layer. The data give the magnitude of Krassovsky's ratio as 3.5 ± 2.2, at periods between about 5 and 10 hours. Comparison with theory shows that the gravity waves responsible for the measured airglow variations must have long wavelengths of several thousand kilometers. The observed phases of Krassovsky's ratio are in good agreement with theoretically predicted values at the long wavelengths and …
Unintended Consequences Of The Kosovo Conflict, 1999 June, Clinton H. Whitehurst Jr.
Unintended Consequences Of The Kosovo Conflict, 1999 June, Clinton H. Whitehurst Jr.
Publications
No abstract provided.
State Of The Cities 1998: Municipal Finances In South Carolina, 1995-96, 1999 June, Holley Hewitt Ulbrich, Ellen Weeks Saltzman
State Of The Cities 1998: Municipal Finances In South Carolina, 1995-96, 1999 June, Holley Hewitt Ulbrich, Ellen Weeks Saltzman
Publications
No abstract provided.
Search For Grb X-Ray Afterglows In The Rosat All-Sky Survey, Jochen Greiner, Dieter H. Hartmann, Wolfgang Voges, Thomas Boller
Search For Grb X-Ray Afterglows In The Rosat All-Sky Survey, Jochen Greiner, Dieter H. Hartmann, Wolfgang Voges, Thomas Boller
Publications
We report on the status of our search for X-ray afterglows of gamma-ray burts (GRBs) using ROSAT all-sky survey (RASS) date. The number of potential X-ray afterglow candidates with respect to the expected number of bearmed GRBs allows to constrain the relative beaming angles of GRB emission and afterglow emission at about 1-5 hrs after the GRB.
The Rheology And Microstructure Of Concentrated, Aggregated Colloids, Leo Silbert, J R. Melrose, R C. Ball
The Rheology And Microstructure Of Concentrated, Aggregated Colloids, Leo Silbert, J R. Melrose, R C. Ball
Publications
No abstract provided.
Asian Law Journal Symposium On Labor And Immigration, Hina Shah
Asian Law Journal Symposium On Labor And Immigration, Hina Shah
Publications
No abstract provided.
Reviewed Work(S): La Estatua De Sal By Salvador Novo, Salvador Oropesa
Reviewed Work(S): La Estatua De Sal By Salvador Novo, Salvador Oropesa
Publications
No abstract provided.
Nato’S Institutional Adaptation And Post-Strategic Security In Europe, 1990-97: Political Challenges And Theoretical Considerations, Alexander Siedschlag
Nato’S Institutional Adaptation And Post-Strategic Security In Europe, 1990-97: Political Challenges And Theoretical Considerations, Alexander Siedschlag
Publications
Die politischen ebenso wie die politologischen Debatten über die Zukunft der NATO begannen schon bald, sich vornehmlich um die Bündniserweiterung und um den gemeinsamen Ausgriff im robusten Konfliktmanagement zu drehen. Diese wichtigen Dimensionen der Zukunft der Allianz und ihrer Rolle bei der Friedenssicherung in und für Europa dürfen aber eine andere, ebenfalls grundlegende Dimension nicht übersehen lassen: die politischen Beziehungen innerhalb der Allianz und die Selbstpositionierung der Allianz gegenüber anderen internationalen 'Sicherheitsinstitutionen'. Dieser Aspekt ist nach dem Madrider Gipfel vom Juli 1997, auf dem die dann im März 1999 erfolgte Erweiterungsrunde beschlossen wurde, zu sehr in den Hintergrund geraten. Doch …
Magnetic Properties Of Rtsb3, Michael Leonard, Shibaji Saha, Naushad Ali
Magnetic Properties Of Rtsb3, Michael Leonard, Shibaji Saha, Naushad Ali
Publications
Magnetization, electrical resistivity, and thermal expansion measurements have been performed on polycrystalline RTSb3 (R=La, Ce, Pr, Nd, Gd, Tb, and Dy; T=Cr, V) samples in order to study their magnetic properties. Depending on the rare-earth element, RTSb3 has been found to have either a purely ferromagnetic (or antiferromagnetic) phase or combination of antiferromagnetic (lower-temperature) and ferromagnetic (higher-temperature) phases. The antiferromagnetic order evolves from the ferromagnetic order as a result of the competition between R3+ and Cr3+ ions. As R is changed from La to Dy, the antiferromagnetic ordering of the R3+ ions becomes more prominent …
Colossal Magnetoresistance In Ce Doped Manganese Oxides, J. R. Gebhardt, S. Roy, N. Ali
Colossal Magnetoresistance In Ce Doped Manganese Oxides, J. R. Gebhardt, S. Roy, N. Ali
Publications
In this study we investigate the effects of Ce doping in R1−xAxMnO3 (R = La, Ce, and A = Sr, Ce) on the magnetic and transport properties of this system. For La1−xCexMnO3 (LCMO), an increase in Ce concentration is accompanied by an increase in TC from 225 to 236 K, as well as an increase in the electrical resistivity. An extremely high resistivity is observed in the new system Ce1−xSrxMnO3 (CSMO) which becomes insulating below its Curie temperature of 43 K. …