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Reply To “Comment On ‘Magnetic Field Effects On Neutron Diffraction In The Antiferromagnetic Phase Of (Formula Presented)' ", Juana Moreno, J. A. Sauls Jan 2002

Reply To “Comment On ‘Magnetic Field Effects On Neutron Diffraction In The Antiferromagnetic Phase Of (Formula Presented)' ", Juana Moreno, J. A. Sauls

Faculty Publications

Fåk, van Dijk, and Wills (FDW) question our analysis of elastic neutron-scattering experiments in the antiferromagnetic phase of (formula presented) They state that our analysis is incorrect because we average over magnetic structures that are disallowed by symmetry. We disagree with FDW and reply to their criticism below. FDW also point out that we have mistaken the magnetic-field direction in the experiment reported in N. H. van Dijk, B. Fåk, L. P. Regnault, A. Huxley, and M-T. Fernández-Díaz, Phys. Rev. B 58, 3186 (1998). We correct this error and note that our previous conclusion is also valid for the correct …

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Density Of States In (Formula Presented)-Wave Superconductors Disordered By Extended Impurities, İnanç Adagideli, Daniel E. Sheehy, Paul M. Goldbart Jan 2002

Density Of States In (Formula Presented)-Wave Superconductors Disordered By Extended Impurities, İnanç Adagideli, Daniel E. Sheehy, Paul M. Goldbart

Faculty Publications

The low-energy quasiparticle states of a disordered d-wave superconductor are investigated theoretically. A class of such states, formed via tunneling between the Andreev bound states that are localized around extended impurities (and result from scattering between pair-potential lobes that differ in sign), is identified. Its (divergent) contribution to the total density of states is determined by taking advantage of connections with certain one-dimensional random tight-binding models. The states under discussion should be distinguished from those associated with nodes in the pair potential. © 2002 The American Physical Society.

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An Optimal Extraction Of Spatially Blended Spectra, R. I. Hynes Jan 2002

An Optimal Extraction Of Spatially Blended Spectra, R. I. Hynes

Faculty Publications

We describe an algorithm to optimally extract individual spectra of blended sources from a long slit spectrum. A semi-analytic model for the spatial profile is used: a Voigt profile for the undersampled core with a numerical correction applied to the wings. This is derived from an isolated source which must also be placed on the slit. χ2 fitting is used to separate the blended components with maximum weight given to the best data. We demonstrate the successful application of the algorithm to data on two X-ray binaries in crowded fields: XTE J2012+381 and V404 Cyg.

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Spectroscopic Observations Of The Candidate Sgb[E]/X-Ray Binary Cl Camelopardalis, R. I. Hynes, J. S. Clark, E. A. Barsukova, P. J. Callanan, P. A. Charles, A. Collier Cameron, S. N. Fabrika, M. R. Garcia, C. A. Haswell, Keith Horne, A. Miroshnichenko, I. Negueruela, P. Reig, W. F. Welsh, D. K. Witherick Jan 2002

Spectroscopic Observations Of The Candidate Sgb[E]/X-Ray Binary Cl Camelopardalis, R. I. Hynes, J. S. Clark, E. A. Barsukova, P. J. Callanan, P. A. Charles, A. Collier Cameron, S. N. Fabrika, M. R. Garcia, C. A. Haswell, Keith Horne, A. Miroshnichenko, I. Negueruela, P. Reig, W. F. Welsh, D. K. Witherick

Faculty Publications

We present a compilation of spectroscopic observations of the sgB[e] star CI Cam, the optical counterpart of XTE J0421+560. This includes data from before, during, and after its 1998 outburst, with quantitative results spanning 37 years. The object shows a rich emission line spectrum originating from circumstellar material, rendering it difficult to determine the nature of either star involved or the cause of the outburst. We collate all available pre-outburst data to determine the state of the system before this occurred and provide a baseline for comparison with outburst and post-outburst data. During the outburst all lines become stronger, and …

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Measurements Of Charged Current Reactions Of [Formula Presented] On [Formula Presented], L. B. Auerbach, R. L. Burman, D. O. Caldwell, E. D. Church, J. B. Donahue, A. Fazely, G. T. Garvey, R. M. Gunasingha, R. Imlay, W. C. Louis, R. Majkic, A. Malik, W. Metcalf, G. B. Mills, V. Sandberg, D. Smith, I. Stancu, M. Sung, R. Tayloe, G. J. Vandalen, W. Vernon, N. Wadia, D. H. White, S. Yellin Jan 2002

Measurements Of Charged Current Reactions Of [Formula Presented] On [Formula Presented], L. B. Auerbach, R. L. Burman, D. O. Caldwell, E. D. Church, J. B. Donahue, A. Fazely, G. T. Garvey, R. M. Gunasingha, R. Imlay, W. C. Louis, R. Majkic, A. Malik, W. Metcalf, G. B. Mills, V. Sandberg, D. Smith, I. Stancu, M. Sung, R. Tayloe, G. J. Vandalen, W. Vernon, N. Wadia, D. H. White, S. Yellin

Faculty Publications

Charged current scattering of [Formula Presented] on [Formula Presented] has been studied using a [Formula Presented] decay-in-flight [Formula Presented] beam at the Los Alamos Neutron Science Center. A sample of [Formula Presented] events satisfying criteria for the exclusive reaction [Formula Presented] was obtained using a large liquid scintillator neutrino detector. The observed flux-averaged cross section [Formula Presented] agrees well with reliable theoretical expectations. A measurement was also obtained for the inclusive cross section to all accessible [Formula Presented] states [Formula Presented] This flux-averaged cross section is [Formula Presented] which is lower than present theoretical calculations. © 2002 The American Physical …

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Measurement Of Day And Night Neutrino Energy Spectra At Sno And Constraints On Neutrino Mixing Parameters, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D. Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford Jan 2002

Measurement Of Day And Night Neutrino Energy Spectra At Sno And Constraints On Neutrino Mixing Parameters, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D. Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford

Faculty Publications

The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted [Formula presented] spectrum, the night minus day rate is [Formula presented] of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the [Formula presented] asymmetry is found to be [Formula presented]. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the large mixing angle solution. © 2002 The American Physical Society.

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Direct Evidence For Neutrino Flavor Transformation From Neutral-Current Interactions In The Sudbury Neutrino Observatory, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D.Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford Jan 2002

Direct Evidence For Neutrino Flavor Transformation From Neutral-Current Interactions In The Sudbury Neutrino Observatory, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D.Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford

Faculty Publications

Observations of neutral-current [Formula presented] interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current (NC), elastic scattering, and charged current reactions and assuming the standard [Formula presented] shape, the [Formula presented] component of the [Formula presented] solar flux is [Formula presented] for a kinetic energy threshold of 5 MeV. The non- [Formula presented] component is [Formula presented], [Formula presented] greater than zero, providing strong evidence for solar [Formula presented] flavor transformation. The total flux measured with the NC reaction is [Formula presented], consistent with solar models. © 2002 The American Physical Society.

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Search For [Formula Presented] And [Formula Presented] Oscillations At Nutev, S. Avvakumov, T. Adams, A. Alton, L. De Barbaro, P. De Barbaro, R. H. Bernstein, A. Bodek, T. Bolton, J. Brau, D. Buchholz, H. Budd, L. Bugel, J. Conrad, R. B. Drucker, B. T. Fleming, R. Frey, J. A. Formaggio, J. Goldman, M. Goncharov, D. A. Harris, R. A. Johnson, J. H. Kim, S. Koutsoliotas, M. J. Lamm, W. Marsh, D. Mason, J. Mcdonald, K. S. Mcfarland, C. Mcnulty, D. Naples, P. Nienaber, V. Radescu, A. Romosan Jan 2002

Search For [Formula Presented] And [Formula Presented] Oscillations At Nutev, S. Avvakumov, T. Adams, A. Alton, L. De Barbaro, P. De Barbaro, R. H. Bernstein, A. Bodek, T. Bolton, J. Brau, D. Buchholz, H. Budd, L. Bugel, J. Conrad, R. B. Drucker, B. T. Fleming, R. Frey, J. A. Formaggio, J. Goldman, M. Goncharov, D. A. Harris, R. A. Johnson, J. H. Kim, S. Koutsoliotas, M. J. Lamm, W. Marsh, D. Mason, J. Mcdonald, K. S. Mcfarland, C. Mcnulty, D. Naples, P. Nienaber, V. Radescu, A. Romosan

Faculty Publications

Limits on [Formula presented] and [Formula presented] oscillations are extracted using the NuTeV detector with sign-selected [Formula presented] and [Formula presented] beams. In [Formula presented] mode, for the case of [Formula presented], [Formula presented] is excluded, and for [Formula presented], [Formula presented]. The NuTeV data exclude the high [Formula presented] end of [Formula presented] oscillation parameters favored by the LSND experiment without the need to assume that the oscillation parameters for [Formula presented] and [Formula presented] are the same. We present the most stringent experimental limits for [Formula presented] oscillations in the large [Formula presented] region. © 2002 The American …

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Precise Determination Of Electroweak Parameters In Neutrino-Nucleon Scattering, G. P. Zeller, K. S. Mcfarland, T. Adams, A. Alton, S. Avvakumov, L. De Barbaro, P. De Barbaro, R. H. Bernstein, A. Bodek, T. Bolton, J. Brau, D. Buchholz, H. Budd, L. Bugel, J. Conrad, R. B. Drucker, B. T. Fleming, R. Frey, J. A. Formaggio, J. Goldman, M. Goncharov, D. A. Harris, R. A. Johnson, J. H. Kim, S. Koutsoliotas, M. J. Lamm, W. Marsh, D. Mason, J. Mcdonald, C. Mcnulty, D. Naples, P. Nienaber, A. Romosan Jan 2002

Precise Determination Of Electroweak Parameters In Neutrino-Nucleon Scattering, G. P. Zeller, K. S. Mcfarland, T. Adams, A. Alton, S. Avvakumov, L. De Barbaro, P. De Barbaro, R. H. Bernstein, A. Bodek, T. Bolton, J. Brau, D. Buchholz, H. Budd, L. Bugel, J. Conrad, R. B. Drucker, B. T. Fleming, R. Frey, J. A. Formaggio, J. Goldman, M. Goncharov, D. A. Harris, R. A. Johnson, J. H. Kim, S. Koutsoliotas, M. J. Lamm, W. Marsh, D. Mason, J. Mcdonald, C. Mcnulty, D. Naples, P. Nienaber, A. Romosan

Faculty Publications

The NuTeV Collaboration has extracted the electroweak parameter [Formula presented] from the measurement of the ratios of neutral current to charged current [Formula presented] and [Formula presented] cross sections. Our value, [Formula presented], is 3 standard deviations above the standard model prediction. We also present a model independent analysis of the same data in terms of neutral-current quark couplings. © 2002 The American Physical Society.

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Single-Photon Quantum-Nondemolition Detectors Constructed With Linear Optics And Projective Measurements, Pieter Kok, Hwang Lee, Jonathan P. Dowling Jan 2002

Single-Photon Quantum-Nondemolition Detectors Constructed With Linear Optics And Projective Measurements, Pieter Kok, Hwang Lee, Jonathan P. Dowling

Faculty Publications

Optical quantum-nondemolition devices can provide essential tools for quantum information processing. Here, we describe several optical interferometers that signal the presence of a single photon in a particular input state without destroying it. We discuss both entanglement-assisted and nonentanglement-assisted interferometers, with ideal and realistic detectors. We found that the existing detectors with 88% quantum efficiency and single-photon resolution can yield output fidelities of up to 89%, depending on the input state. Furthermore, we construct expanded protocols to perform quantum-nondemolition detections of single photons that leave the polarization invariant. For detectors with 88% efficiency, we found polarization-preserving output fidelities of up …

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The Effect Of Reactor Geometry On Frontal Polymerization Spin Modes, John A. Pojman, Jonathan Masere, Enrico Petretto, Mauro Rustici, Do Sung Huh, Min Suk Kim, Vladimir Volpert Jan 2002

The Effect Of Reactor Geometry On Frontal Polymerization Spin Modes, John A. Pojman, Jonathan Masere, Enrico Petretto, Mauro Rustici, Do Sung Huh, Min Suk Kim, Vladimir Volpert

Faculty Publications

Using reactors of different sizes and geometries the dynamics of the frontal polymerization of 1,6-hexanediol diacrylate (HDDA) and pentaerythritol tetraacrylate (PETAC), with ammonium persulfate as the initiator were studied. For this system, the frontal polymerization exhibits complex behavior that depends on the ratio of the monomers. For a particular range of monomers concentration, the polymerization front becomes nonplanar, and spin modes appear. By varying the reactor diameter, we experimentally confirmed the expected shift of the system to a greater number of "hot spots" for larger diameters. For square test tubes a "zig-zag" mode was observed for the first time in …

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The Depth Of Porphyrin In A Membrane And The Membrane's Physical Properties Affect The Photosensitizing Efficiency, Adina Lavi, Hana Weitman, Robert T. Holmes, Kevin M. Smith, Benjamin Ehrenberg Jan 2002

The Depth Of Porphyrin In A Membrane And The Membrane's Physical Properties Affect The Photosensitizing Efficiency, Adina Lavi, Hana Weitman, Robert T. Holmes, Kevin M. Smith, Benjamin Ehrenberg

Faculty Publications

Photosensitized biological processes, as applied in photodynamic therapy, are based on light-triggered generation of molecular singlet oxygen by a membrane-residing sensitizer. Most of the sensitizers currently used are hydrophobic or amphiphilic porphyrins and their analogs. The possible activity of the short-lived singlet oxygen is limited to the time it is diffusing in the membrane, before it emerges into the aqueous environment. In this paper we demonstrate the enhancement of the photosensitization process that is obtained by newly synthesized protoporphyrin derivatives, which insert their tetrapyrrole chromophore deeper into the lipid bilayer of liposomes. The insertion was measured by fluorescence quenching by …

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A Combined Analysis Of Genomewide Linkage Scans For Body Mass Index, From The National Heart, Lung, And Blood Institute Family Blood Pressure Program, Xiaodong Wu, Richard S. Cooper, Ingrid Borecki, Craig Hanis, Molly Bray, Cora E. Lewis, Xiaofeng Zhu, Donghui Kan, Amy Luke, David Curb Jan 2002

A Combined Analysis Of Genomewide Linkage Scans For Body Mass Index, From The National Heart, Lung, And Blood Institute Family Blood Pressure Program, Xiaodong Wu, Richard S. Cooper, Ingrid Borecki, Craig Hanis, Molly Bray, Cora E. Lewis, Xiaofeng Zhu, Donghui Kan, Amy Luke, David Curb

Faculty Publications

A combined analysis of genome scans for obesity was undertaken using the interim results from the National Heart, Lung, and Blood Institute Family Blood Pressure Program. In this research project, four multicenter networks of investigators conducted eight individual studies. Data were available on 6,849 individuals from four ethnic groups (white, black, Mexican American, and Asian). The sample represents the largest single collection of genomewide scan data that has been analyzed for obesity and provides a test of the reproducibility of linkage analysis for a complex phenotype. Body mass index (BMI) was used as the measure of adiposity. Genomewide linkage analyses …

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Ethnic-Difference Markers For Use In Mapping By Admixture Linkage Disequilibrium, Heather E. Collins-Schramm, Carolyn M. Phillips, Darwin J. Operario, Jane S. Lee, James L. Weber, Robert L. Hanson, William C. Knowler, Richard Cooper, Hongzhe Li, Michael F. Seldin Jan 2002

Ethnic-Difference Markers For Use In Mapping By Admixture Linkage Disequilibrium, Heather E. Collins-Schramm, Carolyn M. Phillips, Darwin J. Operario, Jane S. Lee, James L. Weber, Robert L. Hanson, William C. Knowler, Richard Cooper, Hongzhe Li, Michael F. Seldin

Faculty Publications

Mapping by admixture linkage disequilibrium (MALD) is a potentially powerful technique for the mapping of complex genetic diseases. The practical requirements of this method include (a) a set of markers spanning the genome that have large allele-frequency differences between the parental ethnicities contributing to the admixed population and (b) an understanding of the extent of admixture in the study population. To this end, a DNA-pooling technique was used to screen microsatellite and diallelic insertion/deletion markers for allele-frequency differences between putative representatives of the parental populations of the admixed Mexican American (MA) and African American (AA) populations. Markers with promising pooled …

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Climate/Chemistry Effects Of The Pinatubo Volcanic Eruption Simulated By The Uiuc Stratosphere/Troposphere Gcm With Interactive Photochemistry, E. V. Rozanov, M. E. Schlesinger, N. G. Andronova, F. Yang, S. L. Malyshev, V. A. Zubov, T. A. Egorova, B. Li Jan 2002

Climate/Chemistry Effects Of The Pinatubo Volcanic Eruption Simulated By The Uiuc Stratosphere/Troposphere Gcm With Interactive Photochemistry, E. V. Rozanov, M. E. Schlesinger, N. G. Andronova, F. Yang, S. L. Malyshev, V. A. Zubov, T. A. Egorova, B. Li

Faculty Publications

The influence of the sulfate aerosol formed following the massive Pinatubo volcanic eruption in June 1991 on the chemical composition, temperature, and dynamics of the atmosphere has been investigated with the University of Illinois at Urbana-Champaign (UIUC) stratosphere-troposphere General Circulation Model (GCM) with interactive photochemistry (ST-GCM/PC). Ensembles of five runs have been performed for the unperturbed (control) and perturbed (experiment) conditions. The simulated repartitioning within the chlorine and nitrogen groups, as well as the ozone changes, are in reasonable quantitative agreement with observations and theoretical expectations. The simulated ozone changes in the tropics reveal the ozone mixing ratio decreases below …

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Superconducting Properties Of (Formula Presented), D. P. Young, R. G. Goodrich, P. W. Adams, Julia Y. Chan, Frank R. Fronczek, F. Drymiotis, L. L. Henry Jan 2002

Superconducting Properties Of (Formula Presented), D. P. Young, R. G. Goodrich, P. W. Adams, Julia Y. Chan, Frank R. Fronczek, F. Drymiotis, L. L. Henry

Faculty Publications

We present the low-temperature electronic transport properties of the intermetallic commonly known as (formula presented) In contrast to the much simpler (formula presented)-type structure of the 39-K superconductor (formula presented) (formula presented) forms a complex structure-type that is nearly unique in nature. The structure has 110.5 atoms per unit cell and a stoichiometry (formula presented) Polycrystalline (formula presented) is superconducting below (formula presented) with a critical magnetic field (formula presented) Isotopically pure (formula presented) samples have an enhanced (formula presented) Hall-effect measurements suggest that the material is intrinsically compensated. © 2002 The American Physical Society.

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Mixed-Mode Shell-Model Theory For Nuclear Structure Studies, V. G. Gueorguiev, W. E. Ormand, C. W. Johnson, J. P. Draayer Jan 2002

Mixed-Mode Shell-Model Theory For Nuclear Structure Studies, V. G. Gueorguiev, W. E. Ormand, C. W. Johnson, J. P. Draayer

Faculty Publications

We introduce a shell-model theory that combines traditional spherical states, which yield a diagonal representation of the usual single-particle interaction, with collective configurations that track deformations, and test the validity of this mixed-mode, oblique-basis shell-model scheme on [Formula Presented] The correct binding energy (within 2% of the full-space result) as well as low-energy configurations that have greater than 90% overlap with full-space results are obtained in a space that spans less than 10% of the full space. The results suggest that a mixed-mode shell-model theory may be useful in situations where competing degrees of freedom dominate the dynamics and full-space …

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Numerical Methods For The Simulation Of Dynamical Mass Transfer In Binaries, Patrick M. Motl, Joel E. Tohline, Juhan Frank Jan 2002

Numerical Methods For The Simulation Of Dynamical Mass Transfer In Binaries, Patrick M. Motl, Joel E. Tohline, Juhan Frank

Faculty Publications

We describe computational tools that have been developed to simulate dynamical mass transfer in semidetached, polytropic binaries that are initially executing synchronous rotation upon circular orbits. Initial equilibrium models are generated with a self-consistent field algorithm; models are then evolved in time with a parallel, explicit, Eulerian hydrodynamics code with no assumptions made about the symmetry of the system. Poisson's equation is solved along with the equations of ideal fluid mechanics to allow us to treat the nonlinear tidal distortion of the components in a fully self-consistent manner. We present results from several standard numerical experiments that have been conducted …

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Perturbative Evolution Of Conformally Flat Initial Data For A Single Boosted Black Hole, Reinaldo J. Gleiser, Gaurav Khanna, Jorge Pullin Jan 2002

Perturbative Evolution Of Conformally Flat Initial Data For A Single Boosted Black Hole, Reinaldo J. Gleiser, Gaurav Khanna, Jorge Pullin

Faculty Publications

The conformally flat families of initial data typically used in numerical relativity to represent boosted black holes are not those of a boosted slice of Schwarzschild spacetime. If such data are used for each black hole in a collision, the emitted radiation will be partially due to the "relaxation" of the individual holes to "boosted Schwarzschild" form. We attempt to compute this radiation by treating the geometry for a single boosted conformally flat hole as a perturbation of a Schwarzschild black hole, which requires the use of second order perturbation theory. In this we attempt to mimic a previous calculation …

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Finite Spin-Foam-Based Theory Of Three- And Four-Dimensional Quantum Gravity, Rodolfo Gambini, Jorge Pullin Jan 2002

Finite Spin-Foam-Based Theory Of Three- And Four-Dimensional Quantum Gravity, Rodolfo Gambini, Jorge Pullin

Faculty Publications

Starting from Ooguri's construction for BF theory in three (and four) dimensions, we show how to construct a well defined theory with an infinite number of degrees of freedom. The spin network states that are kept invariant by the evolution operators of the theory are exact solutions of the Hamiltonian constraint of quantum gravity proposed by Thiemann. The resulting theory is the first example of a well defined, finite, consistent, spin-foam-based theory in a situation with an infinite number of degrees of freedom. Since it solves the quantum constraints of general relativity it is also a candidate for a theory …

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Raising Livestock In Resource-Poor Communities Of The North West Province Of South Africa - A Participatory Rural Appraisal Study, J. K. Getchell, A. F. Vatta, P. W. Motswatswe, R. C. Krecek, R. Moerane, A. N. Pell, T. W. Tucker, S. Leshomo Jan 2002

Raising Livestock In Resource-Poor Communities Of The North West Province Of South Africa - A Participatory Rural Appraisal Study, J. K. Getchell, A. F. Vatta, P. W. Motswatswe, R. C. Krecek, R. Moerane, A. N. Pell, T. W. Tucker, S. Leshomo

Faculty Publications

A participatory research model was used in six village communities in the Central Region of the North West Province of South Africa in order to achieve the following broad objectives: to obtain information on the challenges owners face in raising livestock in these areas and to evaluate the livestock owners' level of knowledge of internal parasites in their animals. Information obtained at participatory workshops clearly indicated a need for improvements in water supply, schools, job creation, and health services. Lack of pasture for grazing livestock was also cited as being important. Other most frequently mentioned livestock problems included 'gall sickness' …

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Preference Of Food Particle Size Among Several Urban Ant Species., Linda M. Hooper-Bùi, Arthur G. Appel, Michael K. Rust Jan 2002

Preference Of Food Particle Size Among Several Urban Ant Species., Linda M. Hooper-Bùi, Arthur G. Appel, Michael K. Rust

Faculty Publications

Appropriate particle size may be a critical characteristic for effective granular ant baits. We examined the particle size preference of six species of pest ants to an anchovy-based bait. We also examined head capsule widths of Argentine ants, Linepithema humile (Mayr) (mean = 0.54 mm), California harvester ants, Pogonomyrmex californicus (Buckley) (mean = 1.63 mm), red imported fire ants, Solenopsis invicta Buren (mean = 0.9 mm), and southern fire ants, Solenopsis xyloni McCook (mean = 0.76 mm) and compared them with the first and second most preferred particle size. There were differences between particle size of which the most mass …

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Environmental Regulation, Tort Law And Environmental Justice: What Could Have Been, Tseming Yang Jan 2002

Environmental Regulation, Tort Law And Environmental Justice: What Could Have Been, Tseming Yang

Faculty Publications

No abstract provided.

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New Dimensions Of The Section 5 Enforcement Power, David Day Jan 2002

New Dimensions Of The Section 5 Enforcement Power, David Day

Faculty Publications

No abstract provided.

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The Advisory Practice And Procedure Of The Inter-American Court Of Human Rights:Contributing To The Evolution Of International Human Rights Law, Jo Pasqualucci Jan 2002

The Advisory Practice And Procedure Of The Inter-American Court Of Human Rights:Contributing To The Evolution Of International Human Rights Law, Jo Pasqualucci

Faculty Publications

No abstract provided.

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Deadliest Enemies: Law And The Making Of Race Relations On And Off Rosebud Reservation By Thomas Biolsi (Book Review), Frank Pommersheim Jan 2002

Deadliest Enemies: Law And The Making Of Race Relations On And Off Rosebud Reservation By Thomas Biolsi (Book Review), Frank Pommersheim

Faculty Publications

No abstract provided.

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Compelled Expression And The Public Forum Doctrine, Howard M. Wasserman Jan 2002

Compelled Expression And The Public Forum Doctrine, Howard M. Wasserman

Faculty Publications

This Article analyzes the theory underlying the Fist Amendment protection against being compelled by government to utter, present, or fund unwanted expression. The author creates a three-part model for determining when the fire speech rights of an objecting payer have been triggered. Under that model, First Amendment rights are implicated when there has been an actual government compulsion requiring an individual to give money to, or for the express benefit of, a specific private speaker for some use that, in itself, should be understood as expressive. This model strikes a necessary balance between the important theoretical underpinnings of the protection …

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The Influence Of Pitch And Loudness Changes On The Acoustics Of Vocal Tremor, Christopher Dromey, Paul Warrick, Jonathan Irish Jan 2002

The Influence Of Pitch And Loudness Changes On The Acoustics Of Vocal Tremor, Christopher Dromey, Paul Warrick, Jonathan Irish

Faculty Publications

The effect of tremor on phonation is to modulate an otherwise steady sound source in its amplitude, fundamental frequency, or both. The severity of untreated vocal tremor has been reported to change under certain conditions that may be related to muscle tension. In order to better understand the phenomenon of vocal tremor, its acoustic properties were examined as individuals volitionally altered their pitch and loudness. These voice conditions were anticipated to alter the tension of the intrinsic laryngeal muscles. The voices of 10 individuals with a diagnosis of vocal tremor were recorded before participating in a longitudinal treatment study. They …

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The Role Of Outdoor Recreation In Family Enrichment, Patti A. Freeman, Ramon B. Zabriskie Jan 2002

The Role Of Outdoor Recreation In Family Enrichment, Patti A. Freeman, Ramon B. Zabriskie

Faculty Publications

The family is the fundamental unit in society and perhaps the oldest and most important of all human institutions. Several studies have indicated a positive correlation between strong, successful families and family participation in outdoor recreational activities. This paper addresses the role of structured outdoor recreation programming in family enrichment. Findings from two studies based in the United States are presented: one on the effect of a one–day family outdoor adventure program on parental and child perceptions of family functioning and the other from a qualitative inquiry into the meaning of family residential camping experiences. The first study collected both …

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Do Tax-Deferred Exchanges Impact Purchase Price? Evidence From The Phoenix Apartment Market, Andrew Holmes, Barrett A. Slade Jan 2002

Do Tax-Deferred Exchanges Impact Purchase Price? Evidence From The Phoenix Apartment Market, Andrew Holmes, Barrett A. Slade

Faculty Publications

Many authors have commented on the compliance risk associated with taxdeferred exchanges. However, no published studies explicitly address whether the risks associated with the exchange process impact the price at which exchanged assets trade. Using a unique data set that documents transactions for nondirect exchanges, this study examines the price impact of tax-deferred exchanges on apartment transactions in the Phoenix, Arizona, market. Consistent with the price pressure hypothesis originally developed by Scholes (1972) and Kraus and Stoll (1972) and the tax capitalization hypothesis proposed by Oates (1969), the data show that exchange participants pay an economically significant premium to acquire …

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