Digital Commons Network^™

The Impact Of Price And Yield Variability On Southeastern U.S. Catfish Producer Operations (Bulletin #876), Richard F. Kazmierczak Jr., Patricia Soto

LSU AgCenter Bulletins

This study empirically assessed the impact of stochastic price and yield variables on catfish producer profits within a risk-evaluation framework.

The Polarization Of Sb Overlayers On Nimnsb(100), Takashi Komesu, C. N. Borca, Hae Kyung Jeong, P. A. Dowben, Delia Ristoiu, J. P. Nozières, Shane Stadler, Y. U. Idzerda

Faculty Publications

We have investigated the induced polarization of paramagnetic Sb overlayers on the Heusler alloy NiMnSb. From combined X-ray absorption spectroscopy (XAS) and spin-polarized inverse photoemission spectroscopy (SPIPES), we can assign some of the unoccupied states of the Heusler alloy NiMnSb. With increasing thickness of the Sb overlayer, there is a decline in the density of states near the Fermi energy, as expected for a semimetal overlayer on a metallic substrate. While the Sb is polarized by the ferromagnetic NiMnSb substrate, consistent with the expectations of mean field theory, the polarization at the center of the surface/overlayer Brillouin zone cannot be …

Classification Of The Lie Bialgebra Structures On The Witt And Virasoro Algebras, Siu Hung Ng, Earl J. Taft

Faculty Publications

We prove that all the Lie bialgebra structures on the one sided Witt algebra W1, on the Witt algebra W and on the Virasoro algebra V are triangular coboundary Lie bialgebra structures associated to skew-symmetric solutions r of the classical Yang-Baxter equation of the form r = a ∧ b. In particular, for the one-sided Witt algebra W1 = Der k[t] over an algebraically closed field k of characteristic zero, the Lie bialgebra structures discovered in Michaelis (Adv. Math. 107 (1994) 365-392) and Taft (J. Pure Appl. Algebra 87 (1993) 301-312) are all the Lie bialgebra structures on W1 up …

Louisiana Agriculture Summer, 2000, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

A Timber Resource Assessment Of Northwest Louisiana (Bulletin #873), Richard P. Vlosky, N. Paul Chance

LSU AgCenter Bulletins

This publication focuses on forest resources and implications for industry development in this region.

Unusual Magnetism Of Hexaborides, H. R. Ott, J. L. Gavilano, B. Ambrosini, P. Vonlanthen, E. Felder, L. Degiorgi, D. P. Young, Z. Fisk, R. Zysler

Faculty Publications

Various recent experimental investigations have revealed unusual magnetic properties of hexaborides with divalent cations M2+. EuB6 is ferromagnetic below 16 K and its low-temperature properties show remarkable similarities to those of manganese oxides, exhibiting the phenomenon of colossal magnetoresistance. Close to the phase transition as well as far below the ordering temperature, EuB6 exhibits anomalous features, that are briefly discussed. Alkaline-earth hexaborides are close to a metal-insulator transition and it has been found that, in a narrow range of electron doping, an itinerant-type of ferromagnetic order, stable up to temperatures of the order of 600-900 K, is established. This remarkable …

A Most Inhuman Tragedy: Roy Morris, Jr. Explores Whitman's Wartime Hospital Work, Katie L. Theriot

Civil War Book Review

Civil War Book Review (cwbr): One of your earlier works is on Ambrose Bierce and, now, The Better Angel addresses Walt Whitman's wartime hospital service. Do Civil War literary figures offer a particular attraction to you as a writer and historian? Roy Morris (rm): Coming as I....

Same Story, Different Perspective: A View From Inside The 'Cheesebox On A Raft', E. Rory O'Connor

Civil War Book Review

The Monitor Chronicles does not examine the life of "common" sailors, a prominent genre in Civil War literature. Instead, the Mariner's Museum in Newport News, Virginia, enlisted William Marvel to edit and place in historical context the letters of George S. Geer, a member of the ironc....

Direct Nitric Oxide Signal Transduction Via Nitrosylation Of Iron-Sulfur Centers In The Soxr Transcription Activator, Huangen Ding, Bruce Demple

Faculty Publications

Nitric oxide (NO) has diverse roles in intercellular communication and (at higher levels) in immune-mediated cell killing. NO reacts with many cellular targets, with cell-killing effects correlated to inactivation of key enzymes through nitrosylation of their iron-sulfur centers. SoxR protein, a redox-sensitive transcription activator dependent on the oxidation state of its binuclear iron-sulfur ([2Fe-2S]) centers, is also activated in Escherichia coli on exposure to macrophage-generated NO. We show here that SoxR activation by NO occurs through direct modification of the [2Fe-2S] centers to form protein-bound dinitrosyl-iron-dithiol adducts, which we have observed both in intact bacterial cells and in purified SoxR …

Communicative Strategies Of Nonfluent Aphasics: A Comparison Between Strategies Used In Structured Tasks Vs. Those Used During Conversation, Mary Lena Bailey

Honors Capstones

No abstract provided.

Anomalous Shape Recognition Using Computer Vision, Chang-Sik Kim

LSU Historical Dissertations and Theses

In this research, a new method for anomalous shape recognition, named Curvature-Angular Descriptor (CAD), was written. The CAD generates shape feature vectors from a given curve shape. These vectors can be used to uniquely characterize the shape.

The sweet potato has one of the most irregular shapes of any fruit or vegetable. The Standards for Grades of sweet potato shapes (The Code of Federal Regulation, title 7 Agriculture, 1995) are very subjective. For this reason, the sweet potato was chosen as an anomalous shape for evaluating the CAD. The CAD was applied using two methods for sweet potato shape recognition. …

Lumières, Spring 2000, Louisiana State University And Agricultural & Mechanical College

Friends of the LSU Libraries

The bi-annual newsletters from the Friends of the Library contain information about upcoming and recent events, descriptions of new collections, a list of members, and occasional obituaries, which inform members of the news and needs of the LSU Libraries.

S00rs Sgb No. 1 (Budget), Wood

Student Senate Enrolled Legislation

A Bill

To budget the funds of Student Government for the fiscal year 2000-2001; 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.

S00rs Sgb No. 25 (Afc), Grantham, Knull, Wattigny

Student Senate Enrolled Legislation

A BILL

To appropriate six hundred one dollars ($601.00) to the Manship School of Mass Communication Advertising Federation Club to cover the lodging and registration expenses associated with sending its winning advertising campaign team to the 7^th District Advertising competition in Chattanooga, Tennessee.

The Contribution Of The Pet Turtle Industry To The Louisiana Economy (Research Report #108), David W. Hughes

LSU AgCenter Research Reports

This study examined the impact of the Louisiana pet turtle industry on the state economy by using a modified version of an input-output (I-O) model constructed with the Impact Analysis Planning (IMPLAN) model building system.

"Lest We Forget": Louisiana's United Daughters Of The Confederacy And Southern Identity, Alicia Adams

LSU Historical Dissertations and Theses

The United Daughters of the Confederacy (UDC) organized in 1894 and became one of the largest and most popular patriotic societies among white southern women. The Louisiana Division of the UDC formed in 1899 and joined the national organization in its educational, memorial, literary, social, and benevolent pursuits. The women of the UDC studied history and created memories of the Confederacy and of the southern past in order to shape their identity and fulfill their needs in the present. In response to changing times, Louisiana's Daughters of the Confederacy forged an identity that encompassed three facets -- their status as …

Aflatoxin Production In Corn By Aspergillus Flavus Relative To Inoculation, Planting Date, And Harvest Moisture In Louisiana (Research Report #102), K. M. Tubajika, H. J. Mascagni Jr., K. E. Damann, J. S. Russin

LSU AgCenter Research Reports

Contamination of food and feed grains by aflatoxins is a problem throughout the world. Corn produced in the southeastern United States has higher levels of aflatoxin than corn produced in the Corn Belt of the Midwest.

Superflares On Ordinary Solar-Type Stars, Bradley E. Schaefer, Jeremy R. King, Constantine P. Deliyannis

Faculty Publications

Short-duration flares are well known to occur on cool main-sequence stars as well as on many types of "exotic" stars. Ordinary main-sequence stars are usually pictured as being static on timescales of millions or billions of years. Our Sun has occasional flares involving up to ∼1031 ergs that produce optical brightenings too small in amplitude to be detected in disk-integrated brightness. However, we identify nine cases of superflares involving 1033-1038 ergs on normal solar-type stars. That is, these stars are on or near the main sequence, are of spectral class F8-G8, are single (or in very wide binaries), are not …

Effectiveness Of Using An Enterprise System To Facilitate Process -Centered Learning In Business Education., Jose H. Noguera

LSU Historical Dissertations and Theses

This research investigates the effectiveness of using a commercial Enterprise Resource Planning System (ERP) as a supplement tool to teach Enterprise Information Systems concepts in Business Schools. A state-of-the-art ERP System is an integrated enterprise software system that has a windows-based interface, a client-server architecture, and a modular and expandable structure. This complex computer environment provides a rich content domain where students can get exposure to key business, computer science, data communication, and information systems concepts. A significant challenge facing business school educators is to identify how best to deploy a commercial ERP System in their academic environment. Furthermore, an …

Linking Postsecondary Sub -Baccalaureate Institutional Experience To The Career Planning Needs Of Future Workforce., Joycelyn Harrison Brunswick

LSU Historical Dissertations and Theses

Recent changes in the labor market and predictions by the Bureau of Labor Statistics indicate that many of the jobs available in the 21st century will not require a four-year college degree, in contrast to what many high school students perceive will provide their entree to a successful career. Jobs which will be in demand necessitate highly specialized skills which can be developed at post-secondary sub-baccalaureate (PSSB) institutions. High school graduates who do not have the ability, time, money or inclination to earn a bachelor's degree may well obtain economic security by acquiring those skills in great demand, enabling them …

A Neuro-Expert Approach For Decision -Making In Welding Environment., Vivek Goel

LSU Historical Dissertations and Theses

Decision making in welding is very important for achieving a good quality welded joint for the least possible cost. Of particular interest is decision making involving the selection of process, parameters, weld procedure specification, defect analysis and trouble shooting. This research has provided a means of capturing the planning knowledge in a Neuro-Expert System in a form that is capable of learning new information, correcting old information and automating the decision-making process in a welding environment. A strategy is formulated for the representation of knowledge in the form of a neural links and the translation of rules into neural link …

Development And Evaluation Of A Mass Spectrometer -Based Continuous Emission Monitor For Organic Compound Emissions From Combustion Devices., Emmanuel Tijani Wada

LSU Historical Dissertations and Theses

The Mass Spectrometer-based Continuous Emission Monitor (MS-CEM) for organic compounds was developed and evaluated at the Louisiana State University (LSU) Pilot-Scale Rotary Kiln Incinerator (RKI). The MS-CEM consists of stack probe, heat traced sampling line, vacuum pump, particulate filter, Nafion dryer and Extrel mass spectrometer. The Nafion dryer is a special type of dryer that has the ability to remove moisture from the gas sample without removing organic compounds of interest. The mass spectrometer is a quadrupole mass filter. The mass spectrometer includes a computer that controls and optimizes the operation of the unit. The MS-CEM was tested by injecting …

Classically Unstable Approximations For Linear Evolution Equations And Applications., Yu Zhuang

LSU Historical Dissertations and Theses

Temporal discretization methods for evolutionary differential equations that factorize the resolvent into a product of easily computable operators have great numerical appeal. For instance, the alternating direction implicit (ADI) method of Peaceman-Rachford for 2-D parabolic problems greatly reduces the simulation time when compared with the Crank-Nicolson scheme. However, just like many other factorized approximation methods that exhibit numerical stability, the ADI method is known to satisfy only the Von Neumann stability condition, a necessary condition that is usually surmised as sufficient in practical cases as pointed out by Lax and Richtmyer. Intensive efforts have been directed to understand the Von …

Critical Connections: Meaningful Mentoring Relationships Between Women Doctoral Students And Their Dissertation Chairpersons., Dawn Deann Wallace

LSU Historical Dissertations and Theses

The purpose of this research is to explore meaningful mentoring relationships between women doctoral students and their advisors. Specifically, this study examines how graduate women and their advisors navigate and perceive their mentoring relationships during the doctoral program of study. Although research in higher education has addressed the lived experiences of women doctoral students, few have examined the doctoral student/advisor mentoring dynamic from both the student and advisor perspectives. This study provides an understanding of the mentoring experiences of women doctoral students and advisors through qualitative conversation. The participants in the study are 6 women post-doctoral students and their advisors, …

School Life On The Mississippi: An Inquiry Into The Impact Of The Louisiana Reform Movement Related To Standards In World History Instruction In Three Secondary School Settings., Michael Joseph Schramm

LSU Historical Dissertations and Theses

The purpose of this study was to explore the impact of standards on the instruction of world history in three secondary school settings. Contact with the Department of Education of the State of Louisiana found that the implementation of standards had only begun in 1997. After a grace period for implementation, the inaugural testing of the accountability system for these standards occurred in the spring of 2000. Therefore, this study became an exploratory investigation into the use of standards as they impact world history instruction. The first research question was designed to assist the researcher in exploring the influence that …

Comparing Interventions On Disruptive Classroom Behaviors Derived From Descriptive Analysis, Experimental Analysis, And Reinforcer Assessment., Heather Peshak George

LSU Historical Dissertations and Theses

This study investigated whether descriptive analyses, experimental analyses, and reinforcer assessments produced similar patterns of data. Descriptive analyses were conducted to identify baseline levels of disruptive behavior and to systematically describe the co-variation between disruptive behaviors and teacher attention, peer attention, and the academic task. Data on disruptive behavior were analyzed by computing conditional probabilities associated with the preceding and maintaining stimuli (e.g., peer attention). Experimental analyses were conducted to examine the extent to which disruptive behavior was sensitive to the instructional task or to the systematically programmed consequences (e.g., teacher attention). A preference assessment was conducted to identify preferred …

Professional Versus Caregiver Ratings Of The Communicative Abilities Of Adults Displaying Moderate To Profound Communication Challenges., Paul Steven Miller

LSU Historical Dissertations and Theses

Ninety caregivers of 30 adults with moderate-to-serve cognitive, sensory, and physical challenges living in an institutional setting participated in this study to investigate caregiver perceptions of communicative abilities. A mixed effects design was used to compare communication scores of thirty adults. The adults were assigned to three communication proficiency groups. The communicative scores with challenges that were generated with three different assessment activities: a direct/participatory evaluation conducted by a certified speech-language pathologist, an interview of the caregivers, and an observation of daily routine activities. Results indicated that all of the rating procedures differentiated the three communication proficiency groups. Correlations between …

Insecticide Resistance And Resistance Mechanisms In The Southern House Mosquito, Culex Quinquefasciatus., Jeffrey Dwayne Stancil

LSU Historical Dissertations and Theses

Significant resistance to malathion and resmethrin was found in insecticide-treated field populations of adult Culex quinquefasciatus , Say, compared with a laboratory and non-treated field strain. Resistance to both insecticides varied during the active control season and was associated with the frequency of insecticide application. Geographic variations in resistance levels were noted, and significant differences occurred between separate populations within the same mosquito control districts. Four model substrates were assessed for their suitability in detecting elevated esterase activity associated with malathion resistance. Esterase activities towards all substrates were significantly higher in field stains than a laboratory strain. Esterase activities toward …

Comparative Efficacy And Quality Characterizatin Of Mayhaw (Crataegus Opaca) Juice Extraction., Alfred Francois Trappey Ii

LSU Historical Dissertations and Theses

The comparative efficacy and quality characterization of juice by six extraction methods utilizing either frozen or fresh 'Texas Star' mayhaw (Crataegus opaca Hook. and Arn.) fruit obtained from the 1998 and 1999 crop season were conducted according to temperature (cold-press or hot-press extraction) and fruit pulp pretreatment (whole or pulverized fruit with or without pectolytic enzyme). Extraction methods were steam extraction using whole fruit without added pulp juice (SE); steam extraction using whole fruit with added pulp juice (SEP); cold-press extraction using whole fruit (CPE); cold-press extraction using finely macerated fruit pulp (CPEG); hot-press extraction using finely macerated fruit pulp …

Consumers' Reasoned Behavior Toward American Alligator Leather Products., Yingjiao Xu

LSU Historical Dissertations and Theses

This study determined consumers' perception of and attitude toward American alligator leather products and evaluated factors affecting consumers' purchase intention of the products. The Fishbein and Ajzen (1975, 1980) theory of reasoned behavior served as the theoretical framework for the study. The influence of six variables on purchase intention was measured: attitude toward purchase based on product attributes, subjective norm with respect to purchase, traditional attitude toward fashion products (fashion involvement), personality traits (self-confidence and self-consciousness), price perception (price-quality schema and prestige sensitivity), and demographics. The correlation between consumers' usage of media for fashion information and purchase intention was also …