Digital Commons Network^™

Patterns Of Nucleotide Substitution Within And Among Mitochondrial Gene Regions In Sea Star (Leptasterias Spp), Adam Wayne Hrincevich

LSU Doctoral Dissertations

In this study, 23 molecular lineages within the species-rich sea star genus Leptasterias subgenus Hexasterias section Camtschatica and an outgroup Leptasterias polaris were examined for patterns of mtDNA nucleotide sequence variation and evolution. Two separate regions of the mitochondrial genome were sequenced. The first region (549-bp) spanned the partial 3' ends of the 12s rRNA and 16s rRNA genes, complete tRNAs for glutamic acid and threonine, and complete putative control region. The second region (1644-bp) spanned approximately 85% of the 3' end of the cytochrome oxidase subunit I gene, complete tRNA for arginine and approximately 85% of the 5' end …

Redshifts And Luminosities For 112 Gamma-Ray Bursts, Bradley E. Schaefer, Ming Deng, David L. Band

Faculty Publications

Two different luminosity indicators have recently been proposed for gamma-ray bursts that use gamma-ray observations alone. They relate the burst luminosity (L) with the time lag between peaks in hard and soft energies (τlag) and the spikiness or variability of the burst's light curve (V). These relations are currently justified and calibrated with only six or seven bursts with known redshifts. We have examined BATSE data for τlag and V for 112 bursts. (1) A strong correlation between τlag and V exists, and it is exactly as predicted from the two proposed relations. This is proof that both luminosity indicators …

Fusobacteriosis In Captive Wild-Caught Pronghorns (Antilocapra Americana), J. F. Edwards, D. S. Davis, T. J. Roffe, F. Ramiro-Ibañez, P. H. Elzer

Faculty Publications

An outbreak of Fusobacterium necrophorum-induced septicemia occurred in a group of 40 captive wild-caught pronghorns (Antilocapra americana). Primary pododermatitis or necrotic stomatitis progressed to produce fatal septicemia with metastatic lesions in the forestomachs, lung, liver, and cecum in 38 of the animals. Two remaining animals were euthanatized because of chronic pododermatitis. Housing the animals in a pasture previously used by bovids and heavy rains with persistence of ground water pools in the pasture were contributing factors in the pathogenesis of this outbreak.

Swst 1: An O-Rich Planetary Nebula Around A C-Rich Central Star, Orsola De Marco, P. A. Crowther, M. J. Barlow, Geoffrey C. Clayton, A. De Koter

Faculty Publications

The hydrogen-deficient [WCL] type central star HD 167362 and its planetary nebula (PN) SwSt 1 are investigated. The central star has a carbon-rich emission-line spectrum, and yet the nebula exhibits a 10-μm emission feature from warm silicate dust, perhaps indicating a recent origin for the carbon-rich stellar spectrum. Its stellar and nebular properties might therefore provide further understanding as to the origin of the [WCL] central star class. The central star optical and UV spectra are modelled with state-of-the art non-LTE codes for expanding atmospheres, from which the stellar parameters are determined. Using the Sobolev approximation code ISA-Wind, we find …

Into The Midst Of Chaos': Young Adult Title Recounts The Demise Of Fort Sumter, Mary Bahr Fritts

Civil War Book Review

Major Robert Anderson, USA, has achieved the unenviable position of opening civil war," shouted the headlines. The Charleston Courier interpreted Anderson's removal of federal troops in December 1860 from Fort Moultrie to Fort Sumter as hostile. His move, even though "under cloak of night," w....

Readout And Control Of A Power-Recycled Interferometric Gravitational-Wave Antenna, Peter Fritschel, Rolf Bork, Gabriela González, Nergis Mavalvala, Dale Ouimette, Haisheng Rong, Daniel Sigg, Michael Zucker

Faculty Publications

Interferometric gravitational-wave antennas are based on Michelson interferometers whose sensitivity to small differential length changes has been enhanced by the addition of multiple coupled optical resonators. The use of optical cavities is essential for reaching the required sensitivity but sets challenges for the control system, which must maintain the cavities near resonance. The goal for the strain sensitivity of the Laser Interferometer Gravitational-Wave Observatory (LIGO) is 10-21 rms, integrated over a 100-Hz bandwidth centered at 150 Hz. We present the major design features of the LIGO length and frequency sensing and control system, which will hold the differential length to …

Sugarcane Combine Harvester Ownership Costs(Research Report #112), M. E. Salassi, J. B. Breaux

LSU AgCenter Research Reports

This report presents annual ownership cost estimates associated with sugarcane combine harvesters. Two primary types of annual machinery ownership costs are defined, and estimates of these costs are calculated using current combine harvester purchase prices.

Economically Optimal Crop Cycle Length For Major Sugarcane Varieties In Louisiana (Research Report #111), M. E. Salassi, J. B. Breaux

LSU AgCenter Research Reports

The recent, widespread adoption of the variety LCP 85-384 has caused sugarcane producers in Louisiana to reevaluate the number of stubble crops to keep in production before plowing out and replanting. This report outlines a procedure that can be used to determine the optimal number of sugarcane stubble crops to keep in production with the goal of maximizing producer net returns.

Measurement Of The Cosmic-Ray Energy Spectrum And Composition From 1017 To 1018.3 Ev Using A Hybrid Technique, T. Abu-Zayyad, K. Belov, D. J. Bird, J. Boyer, Z. Cao, M. Catanese, G. F. Chen, R. W. Clay, C. E. Covault, H. Y. Dai, B. R. Dawson, J. W. Elbert, B. E. Fick, L. F. Fortson, J. W. Fowler, K. G. Gibbs, M. A.K. Glasmacher, K. D. Green, Y. Ho, A. Huang, C. C. Jui, M. J. Kidd, D. B. Kieda, B. C. Knapp, S. Ko, C. G. Larsen, W. Lee, E. C. Loh, E. J. Mannel, J. Matthews, J. N. Matthews, B. J. Newport, D. F. Nitz

Faculty Publications

We study the spectrum and average mass composition of cosmic rays with primary energies between 1017 and 1018 eV using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the Michigan Muon Array (MIA). Measurements have been made of the change in the depth of shower maximum as a function of energy. A complete Monte Carlo simulation of the detector response and comparisons with shower simulations leads to the conclusion that the cosmic-ray intensity is changing from a heavier to a lighter composition in this energy range. The spectrum is consistent with earlier Fly's Eye measurements …

L-Cysteine-Mediated Destabilization Of Dinitrosyl Iron Complexes In Proteins, Paul A. Rogers, Huangen Ding

Faculty Publications

Nitric oxide is a signaling molecule in intercellular communication as well as a powerful weapon used by macrophages to kill tumor cells and pathogenic bacteria. Here, we show that when Escherichia coli cells are exposed to nitric oxide, its ferredoxin [2Fe-2S] cluster is nitrosylated, forming the dinitrosyl iron complex with a characteristic EPR signal at gav = 2.04. Such formed ferredoxin dinitrosyl iron complex is efficiently repaired in E. coli cells even in the absence of new protein synthesis. However, the repair activity is completely inactivated once E. coli cells are disrupted, indicating that repairing the ferredoxin dinitrosyl iron complex …

Function Of Escherichia Coli Biotin Carboxylase Requires Catalytic Activity Of Both Subunits Of The Homodimer, Kamala Janiyani, Tee Bordelon, Grover L. Waldrop, John E. Cronan

Faculty Publications

Biotin carboxylase catalyzes the ATP-dependent carboxylation of biotin and is one component of the multienzyme complex acetyl-CoA carboxylase that catalyzes the first committed step in fatty acid synthesis. The Escherichia coli biotin carboxylase is readily isolated from the other components of the acetyl-CoA carboxylase complex such that enzymatic activity is retained. The three-dimensional structure of biotin carboxylase, determined by x-ray crystallography, demonstrated that the enzyme is a homodimer consisting of two active sites in which each subunit contains a complete active site. To understand how each subunit contributes to the overall function of biotin carboxylase, we made hybrid molecules in …

Determining A Fair Rental Arrangement (Research Report #110), Kenneth W. Paxton, Michael E. Salassi

LSU AgCenter Research Reports

Most of the crop agriculture in Louisiana is produced on rented land. The purpose of this publication is to help tenants and landlords make better informed decisions and develop fair rental arrangements.

Annotations, Cwbr_Editor

Civil War Book Review

No abstract provided.

Charge Effects On Gravitational Wave Detectors, R. F. O'Connell

Faculty Publications

We show that the mean-square displacement of a charged oscillator due to the zero point oscillations of the radiation field is unique in the sense that it is very sensitive to the value of the bare mass of the charge. Thus, a controlled experiment using gravitational wave detectors could lead to a determination of the electron bare mass and shed some light on quantum electrodynamic theory. We also speculate that the irregular signals of non-gravitational origin often observed in gravitational wave bar detectors could be caused by stray charges and that such charges could also adversely affect LIGO and other …

On The Meromorphic Extension Of The Spherical Functions On Noncompactly Causal Symmetric Spaces, G. Ólafsson, A. Pasquale

Faculty Publications

We determine integral formulas for the meromorphic extension in the λ-parameter of the spherical functions φλ on a noncompactly causal symmetric space. The main tool is Bernstein's theorem on the meromorphic extension of complex powers of polynomials. The regularity properties of φλ are deduced. In particular, the possible λ-poles of φλ are located among the translates of the zeros of the Bernstein polynomial. The translation parameter depends only on the structure of the symmetric space. The expression of the Bernstein polynomial is conjectured. The relation between the Bernstein polynomial and the product formula of the cΩ-function is analyzed. The conjecture …

Of Manatees, Mangroves, And The Mississippi River: Is There An Estuarine Signature For The Gulf Of Mexico?, R. Eugene Turner

Faculty Publications

Important parameters of estuarine variability include morphology, flushing times, nutrient loading rates, and wetland: water ratios. This variability both reflects and disguises underlying relationships between the physics and biology of estuaries, which this comparative analysis seeks to reveal, using the Gulf of Mexico (GOM) estuaries as a starting point. A question used to focus this analysis is: are the GOM estuaries unique? The GOM receives the Mississippi River, a uniquely large, world-class river, which dominates the freshwater and nutrient inflows to the GOM continental shelf, whose margins include 35 major estuarine systems. These GOM estuaries have 28% and 41% of …

S01rs Sgb No. 1 (Budget), Mccune

Student Senate Enrolled Legislation

A Bill

To budget the funds of Student Government for the fiscal year 2001-2002; to appropriate funds for activities, projects, and programs of Student Government; to appropriate grants to certain student groups and organizations; according to the Constitution and by-laws.

Anomalous Nmr Spin-Lattice Relaxation In Srb6 And Ca1-Xlaxb6, J. L. Gavilano, Sh Mushkolaj, D. Rau, H. R. Ott, A. Bianchi, D. P. Young, Z. Fisk

Faculty Publications

We report the results of 11B nuclear magnetic resonance (NMR) measurements of SrB6 and Ca0.995La0.005B6 below room temperature. Although the electrical resistivities of these two materials differ substantially, their 11B-NMR responses exhibit some strikingly common features. Both materials exhibit ferromagnetic order, but their 11B-NMR spectra reveal very small hyperfine fields at the boron sites. The spin-lattice relaxation T-11 varies considerably with external field but changes with temperature only below a few K. We discuss these unusual results by considering various different scenarios for the electronic structure of these materials. © 2001 The American Physical Society.

The Field Equation From Newton's Law Of Motion And The Absence Of Magnetic Monopole, Parampreet Singh, Naresh Dadhich

Faculty Publications

By requiring the linear differential operator in Newton's law of motion to be self adjoint, we obtain the field equation for the linear theory, which is the classical electrodynamics. In the process, we are also led to a fundamental universal chiral relation between electric and magnetic monopoles which implies that the two are related. Thus there could just exist only one kind of charge which is conventionally called electric.

The 'Unwritten War' No Longer: Alice Fahs Explores Popular Literature Of The Civil War, Bonnie L. Bates

Civil War Book Review

Civil War Book Review (cwbr): In The Imagined Civil War, you note that popular literature during this time was "part of a shared culture." Why does it have resonance in the literary world today? Alice Fahs (af): Popular literature can offer a wider, more comprehensive....

A Note On Doubles Of Groups, Nadia Benakli, Oliver T. Dasbach, Yair Glasner, Brian Mangum

Faculty Publications

Recently, Rips produced an example of a double of two free groups which has unsolvable generalized word problem. In this paper, we show that Rips's example fits into a large class of doubles of groups, each member of which contains F2×F2 and therefore has unsolvable generalized word problem and is incoherent. © 2001 Elsevier Science B.V.

Psychosocial Correlates Of Eating Disorder Symptoms In A Young, Black, Female Sample., Nancy Lee Zucker

LSU Historical Dissertations and Theses

The present investigation examined the psychosocial correlates of eating disorder symptoms among a young sample of Black female adolescents. Recent epidemiological investigations have documented higher rates of disordered eating in Black females than had previously been reported. Because of the high prevalence of these symptoms both in majority and in minority populations, many eating disorder researchers are promoting preventive strategies to stem further increases in symptom levels. To this end, several longitudinal investigations have been conducted to delineate the risk factors of disordered eating among White adolescent populations. However, Black adolescents have been minimally represented in these samples. Thus, there …

Group Evaluation System Measuring Self-Reported Cooperative Extension Nutrition Education Program Impact In Adult Limited Resource Audiences With Diverse Literacy Skills., Annrose Mary Guarino

LSU Historical Dissertations and Theses

A Group Evaluation System was developed to evaluate the effectiveness of the Louisiana State University Agricultural Center Family Nutrition Program for use with adult limited resource audiences with diverse literacy skills. Using existing nutrition education resources, an exit survey instrument was developed and tested for validity and reliability. The group administered test format incorporated food associated graphic illustrations and response symbols with written questions read by the instructor. An instrument mock-up was reviewed by an expert panel and two intended-audience focus groups, one with functional reading skills and one without. During data collection, a pretest was conducted with a convenience …

Effective Lobbying Strategies For Higher Education In State Legislatures As Perceived By Government Relations Officers., Ellen Prothro Murphy

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the effectiveness of various lobbying strategies for higher education in state legislatures as perceived by state government relations officers. The target population for the study was defined as individuals currently employed as state government relations officers for public institutions of higher education. Data were collected for this study by surveying government relations officers contacted through the 7th Annual State Relations Conference. The total number of usable responses was 109 (74%) of 147 surveyed from 36 states. The instrument utilized in this study was a researcher designed questionnaire that included a demographic …

The Effect Of Domestic Violence On Welfare Use, Employment And Mental Health: A Quantitative And Qualitative Analysis., Taryn Patricia Lindhorst

LSU Historical Dissertations and Theses

This dissertation is an empirical policy analysis which investigates the effect of domestic violence on a woman's welfare status, employment, and mental health within the context of new policies instituted by welfare reform. It uses quantitative data from a panel survey, and qualitative narratives from respondents who reported current domestic abuse. Multivariate analysis of welfare outcomes finds that domestic violence affects welfare outcomes indirectly through its effect on depression. Depression is associated with unemployment, continuing on TANF, and being sanctioned off welfare. Domestic violence is one of the strongest predictors of the level of reported depression. Abuse is not directly …

Perceptions Of Work Ethic Among College Seniors., Patricia Nolen Pierson

LSU Historical Dissertations and Theses

Orientation and attitudes toward work are important issues in the workforce where fierce global competition and demands for increased productivity threaten virtually every business and industry. Managers and executives perceive an erosion of work ethic by America's young people and claim that today's college students have no realistic concept of "a day's work for a day's pay". The purpose of this study, therefore, was to determine the perceptions of work ethic among university seniors and further, to determine if differences in work ethic exist based on the variables gender, ethnic group, marital status, number of children, age, planned occupation, current …

Girls Who Would Be Gods: The Poetry Of Emily Dickinson, Elizabeth Bishop, And Sylvia Plath., Anna Lynn Priddy

LSU Historical Dissertations and Theses

Girls Who Would Be Gods: The Poetry of Emily Dickinson, Elizabeth Bishop, and Sylvia Plath charts the development of these three American poets, from concerns with ambition and competition that appear in their early poetry, letters and journals, to their later creation of myths surrounding themselves and the secondary worlds of their creation. With Plath's explicit wish that she might be God, Bishop's Crusoe-like exile that allows her to create imaginary realms and homes, and Dickinson's not entirely tentative proposal that she might well be the Biblical Eve, these poets indulged in imaginative re-creations of their worlds and their selves. …

Learning To Teach In A Virtual Environment: A Case Study Of The Louisiana Virtual Classroom Teachers., Rachel Geralyn Sellers

LSU Historical Dissertations and Theses

In the 2000 school year the Louisiana Department of Education commissioned a Distance Learning Task Force Committee to establish State Standards for Distance Education. These Standards supported the core beliefs set forth by the state's educational technology goal: "All educators and learners will have access to technologies that are effective in improving student achievement" (State Standards, p. 1). Emerging technologies, such as web-based instruction, were implemented to support these standards. These new technologies prompted the Louisiana Center for Educational Technology to establish the Louisiana Virtual Classroom. This project was a program that included a consortium of high school teachers for …

Writing The Beloved Community: Integrated Narratives In Six Contemporary American Novels About The Civil Rights Movement., Paul Tewkesbury Iii

LSU Historical Dissertations and Theses

Throughout the 1950s and 1960s, black southerners in the United States engaged in the series of nonviolent social protests known collectively as the Civil Rights Movement. Martin Luther King, Jr., spoke often of the integrated "Beloved Community" that would result from this nonviolent direct action. This dissertation examines the ways in which six contemporary American novelists have created fictional narratives about the Civil Rights Movement, narratives that employ "integrationist" literary devices whereby form reflects the theme of the search for the Beloved Community across race, gender, and class lines. That is, each novelist chooses to tell his or her story …

Bringing The Community Back In: The Mediating Role Of Civic Community In The Socioeconomic Disadvantage And Homicide Relationship In Rural And Urban Counties, 1980--1990., Troy Christopher Blanchard

LSU Historical Dissertations and Theses

One key explanation of aggregate rates of homicide in localities across the U.S. is social disorganization theory. This theory posits that disadvantaged neighborhoods lack the social and economic resources to exert social control on community residents. One shortcoming of this approach is that it cannot adequately explain urban-rural differences in African American homicide victimization. While African Americans in rural areas experience similar or even more extreme levels of disadvantage than their urban counterparts, the risk of homicide for rural African Americans is significantly lower. To address this shortcoming, I develop a conceptually different, although complimentary, explanation of violence grounded in …