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Modeling Corrosion In Oxygen Controlled Lbe Systems With Coupling Of Chemical Kinetics And Hydrodynamics, Samir Moujaes, Yitung Chen

Transmutation Sciences Materials (TRP)

The proposed work will combine chemical kinetics and hydrodynamics in target and test-loop lead-bismuth eutectic (LBE) systems to model system corrosion effects. This approach will result in a predicative tool that can be validated with corrosion test data, used to systematically design tests and interpret the results, and provide guidance for optimization in LBE system designs. The task includes of two subtasks. The first subtask is to try to develop the necessary predictive tools to be able to predict the levels of oxygen and corrosion products close to the boundary layer through the use of Computational Fluid Dynamics (CFD) modeling. …

Hydrogen-Induced Embrittlement Of Candidate Target Materials For Applications In Spallation-Neutron-Target Systems, Brendan O'Toole, Ajit K. Roy

Transmutation Sciences Materials (TRP)

The purpose of this project is to evaluate the effect of hydrogen on cracking of candidate target materials for applications in spallation-neutron-target (SNT) systems such as accelerator production of tritium (APT) and accelerator transmutation of waste (ATW). The test materials will undergo appropriate thermal treatments prior to being hydrogen-charged by potentiostatic cathodic polarization technique in a simulated aqueous environment at different temperatures of interest. The specimens, upon completion of testing, will be metallographically examined. Further, the scanning electron microscopy (SEM) will be used to determine the extent and nature of cracking in the specimens tested. The thrust of the proposed …

Real-Time Travel Time Estimation Using Macroscopic Traffic Flow Models, Pushkin Kachroo, Kaan Ozbay, Antoine G. Hobeika

Electrical & Computer Engineering Faculty Research

This paper presents the estimation of travel time on highways based on macroscopic modelling. The focus is on real-time values as compared to average or static values. The macroscopic models are used for distributed and time/space lumped settings and corresponding travel time estimation functions and algorithms are developed. The implications of these algorithms for the implementation of various incident management and traffic control strategies are also discussed.

University Of Nevada, Las Vegas Advanced Accelerator Applications University Participation Program: Quarterly Report First Quarter (March-May 2001), Anthony Hechanova

Transmutation Research Program Reports (TRP)

This Quarterly Report is a primary deliverable from the University of Nevada, Las Vegas (UNLV) Advanced Accelerator Applications (AAA) University Participation Program (UPP) director to the U.S. Department of Energy Office of Nuclear Energy, Science and Technology (DOE-NE) as defined in the UNLV AAA Proposal.

The foundation of the UNLV AAA University Participation Program started as a grassroots effort in the late 1990s among community members and local, state, and federal representatives to encourage research and development of technical alternatives to direct disposal of used nuclear fuel which had been targeted since the early 1980s for Yucca Mountain, Nevada. A …

Relativistic Effects On Interchannel Coupling In Atomic Photoionization: The Photoelectron Angular Distribution Of Xe, Oliver Hemmers, S. T. Manson, M. M. Sant'anna, P. Focke, H. Wang, I. A. Sellin, Dennis W. Lindle

Environmental Studies Faculty Publications

Measurements of the photoelectron angular-distribution asymmetry parameter β for Xe 5s photoionization have been performed in the 80–200 eV photon-energy region. The results show a substantial deviation from the nonrelativistic value of β=2 and provide a clear signature of significant relativistic effects in interchannel coupling.

A Cytochrome-B Perspective On Passerina Bunting Relationships, John Klicka, Adam J. Fry, Robert M. Zink, Christopher W. Thompson

Ornithology Program (HRC)

We sequenced the complete mitochondrial cytochrome-b gene (1,143 nucleotides) for representatives of each species in the cardinalid genera Passerina (6 species), Guiraca (1 species), and Cyanocompsa (3 species), and used a variety of phylogenetic methods to address relationships within and among genera. We determined that Passerina, as presently recognized, is paraphyletic. Lazuli Bunting (P. amoena) is sister to the much larger Blue Grosbeak (Guiraca caerulea). Indigo Bunting (P. cyanea) and Lazuli Bunting are not sister taxa as generally thought. In all weighted parsimony trees and for the gamma-corrected HKY tree, Indigo Bunting is …

Nurses, Pharmacists, And Information Technology In Public Healthcare, Larry Allen Malato

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to explore the healthcare professional’s experience during the implementation of information technology. The focus is on the implementation of a computerized medication ordering, dispensing, and tracking system in acute care departments of a 600- bed public hospital. Spradley’s qualitative, ethnographic research methods were used to discover the personal meaning of the implementation. How do pharmacists and nurses feel about the implementation of an advanced technology system? Are there any barriers to implementation? Findings suggest a resistance to implementation by professionals in the disciplines of Pharmacy and Nursing. Resistance is based on their perceptions of …

Characterizing And Calibrating A Large Helmholtz Coil At Low Ac Magnetic Field Levels With Peak Magnitudes Below The Earth's Magnetic Field, Robert A. Schill, Karin V. Hoff

Electrical & Computer Engineering Faculty Research

Characterizing and calibrating a low impedance large Helmholtz coil generating 60 Hz magnetic fields with amplitudes well below the earth’s magnetic field is difficult and imprecise when coil shielding is not available and noise is an issue. Parameters influencing the calibration process such as temperature and coil impedance need to be figured in the calibration process. A simple and reliable calibration technique is developed and used to measure low amplitude fields over a spatial grid using a standard Hall effect probe gaussmeter. These low amplitude fields are typically hard or impossible to detect in the presence of background fields when …

Seismicity In The Vicinity Of Yucca Mountain, Nevada, For The Period October 1, 1997 To September 20, 1999, David H. Von Seggern, Ken Smith, Glenn Biasi

Publications (YM)

Starting on October 1, 1995 the monitoring of seismicity within the southern Great Basin near Yucca Mountain was performed with a new digital network. This network features three-component recording with 24-bit A/D conversion in the field. Continuous data is collected at 20 sps, and event triggered windows are collected at 100 samples per second. A seismic bulletin of events is made by associating triggers occurring within a prescribed time window. classifying the local earthquake events, and locating the earthquakes and computing their magnitudes with conventional methods. This report covers the operational and seismic results of the third and fourth full …

Auto Dealership Compliance With Hazardous Materials Management In The Las Vegas Valley, Lisa Evenson

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Nevada Division of Environmental Protection inspects automobile dealerships in Las Vegas and Henderson approximately every two years to evaluate their compliance with hazardous waste disposal regulations. The follow-up inspections alert the Division as to which regulatory issues appear to be the most problematic and occur most often. This paper provides the methods and information needed to establish auto dealership compliance in the Las Vegas Valley, and the results obtained from the inspections of those facilities. The data is then summarized to allow the Division to determine the effectiveness of its current enforcement program.

Third Time's The Charm: Choosing A Career In Librarianship, P. S. Mcmillen

Library Faculty Research

While many come to librarianship from other careers, I made my third major career change to the profession after a somewhat atypical process. I made myself the subject of a formal assessment process while completing a certificate program in career counseling. One of the first things we learned in the career counseling program is that most people take essentially an opportunistic path to their various jobs and careers, e.g., you know someone who does something that sounds sort of interesting, or someone knows someone else who needs someone… It’s often a very generic process and is, in fact, why so …

Anionic Photofragmentation Of Co: A Selective Probe Of Core-Level Resonances, Wayne C. Stolte, D. L. Hansen, Maria Novella Piancastelli, I. Dominguez-Lopez, A. Rizvi, Oliver Hemmers, H. Wang, Alfred S. Schlachter, M. S. Lubell, Dennis W. Lindle

Environmental Studies Faculty Publications

Anion-yield spectroscopy using x rays is shown to be a selective probe of molecular core-level processes, providing unique experimental verification of shape resonances. For CO, partial anion and cation yields are presented for photon energies near the C K edge. The O^- yield exhibits features above threshold related only to doubly excited states, in contrast to cation yields which also exhibit pronounced structure due to the well-known σ^* shape resonance. Because the shape resonance is completely suppressed for O^-, anion spectroscopy thus constitutes a highly selective probe, yielding information unobtainable with absorption or electron spectroscopy.

The Taxonomic Rank Of Spizella Taverneri: A Response To Mayr And Johnson, John Klicka, Robert M. Zink, Jon C. Barlow, W. Bruce Mcgillivray, Terry J. Doyle

Ornithology Program (HRC)

Mayr and Johnson suggest that Spizella taverneri should be a subspecies of the biological species S. breweri, because it is possibly not reproductively isolated. We originally concluded that evidence from mitochondrial DNA sequences, habitat preferences, timing of breeding, vocalizations, and morphology supported the recognition of S. taverneri as a phylogenetic and biological species. Nothing in the commentary by Mayr and Johnson causes us to change that conclusion. We believe that it is probable that these two allopatric taxa are isolated. Contrary to Mayr and Johnson, we believe that more information is given by ranking S. taverneri as a species, because …

Overview Of Fuzzy Logic, Mohamed Trabia

Mechanical Engineering Faculty Presentations

The presentation includes a brief introduction to fuzzy logic and fuzzy logic controllers. These concepts are illustrated by an example of an autonomous vehicle controller.

Comparison Of Two Distributed Fuzzy Logic Controllers For Flexible-Link Manipulators, Linda Z. Shi, Mohamed Trabia

Mechanical Engineering Faculty Presentations

The paper suggests that fuzzy logic controllers present a computationally efficient and robust alternative to conventional controllers. The paper presents two possible structures for the distributed fuzzy logic controller of a single-link flexible manipulator. A linear quadratic regulator method is used to prove the effectiveness of fuzzy logic controllers.

Design Of Fuzzy Logic Controllers For Optimal Performance, Mohamed Trabia

Mechanical Engineering Faculty Presentations

While fuzzy logic controllers are generally robust, the performance of a system whose behavior is not well understood, or that has a large number of coupled inputs and outputs, may be less than optimal. In this paper, nonlinear programming techniques are used to improve the performance of a fuzzy logic controller for navigating an autonomous vehicle.

Third Time’S The Charm: Choosing A Career In Librarianship, P. S. Mcmillen

Library Faculty Research

While many come to librarianship from other careers, I made my third major career change to the profession after a somewhat atypical process. I made myself the subject of a formal assessment process while completing a certificate program in career counseling.

Sales And Use Taxes In Clark County And Potential Implications Of The Internet Sales Tax Moratorium, Patrick Timothy Collins Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sales taxes have been a much-depended on source of revenue for local governments since the early part of the 1900’s. Southern Nevada local governments rely relatively heavily on sales and use taxes for a source of income. In 1998, the United States Congress passed an Act that imposed a moratorium on Internet sales tax collection until October 2001. With the explosive growth in Internet sales, the issue of the failed collection of an Internet sales tax has come to the forefront of local government finance discussions.

An Ethical Framework For Interpreting The United States Endangered Species Act, Cathryn M. Elgin

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this study I argue that a holistic approach is better than an individualistic approach for interpreting the United States Endangered Species Act (ESA). I propose that the use of a holistic ethical framework, based on fundamental environmental philosophy, is better in that it more effectively fulfills the ESA's goals of species and ecosystem conservation. Holistic ethics is based on concern for a community as a whole, while individualistic ethics is based on concern for the individual. A holistic approach, I argue, is more beneficial to nature than is an individualistic approach or other non-holistic approaches. I set up basic …

Policy For Management Of Living Collections At The Las Vegas Springs Preserve, Peter F. Duncombe

UNLV Theses, Dissertations, Professional Papers, and Capstones

This paper, prepared for the Department of Public Administration, discusses policy in botanic gardens in regard to development and management of living collections and the potential implementation at the Las Vegas Springs Preserve. Review of the literature and study of policy from other institutions has resulted in recommendation of policy for the Preserve. Its basic contents describe the purpose and need for collections policy, examine the elements of collection policy, characterizes the types of living collections to be held at the Preserve, and outlines the objectives of these collections. This document raises issues associated with the management of living collections …

Design And Analysis For Melt Casting Metallic Fuel Pins Incorporating Volatile Actinides, Yitung Chen, Darrell Pepper, Randy Clarksean

Fuels Campaign (TRP)

UNLV investigators will evaluate and select a process for the melt casting of metallic fuel pins that contain volatile actinides. This work will be performed with the guidance of Argonne National Laboratory (ANL) engineers to insure that their knowledge and experience benefits the project. The research to be conducted during year one will center on selecting, evaluating, and modeling potential alternatives to the traditional injection casting process used at ANL. Processing conditions will be analyzed, basic models utilized, and detailed heat and mass transfer models will be developed to analyze the most promising processes. The goal of the first year …

Collaborative Interaction: Military Managers Consulting With American Indians, Susan B. Barrow

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research paper outlines methods for American Indians’ and military land managers’ collaborative work of accomplishing resource stewardship aimed at achieving both the Indians’ “One Earth” and military “Mission Preparedness” postures. The research goal is to benefit military facility managers’ by providing tools to establish interaction programs with Indian Tribes and organizations. The paper provides a process framework, gleaned from on-going programs, directives, and policies identified by reviewing books, journals, and reports. A comparison of the process-streams from several programs was conducted determining steps recurring in the programs. These repeated steps form key processes for use by installation managers in …

Special Report On Children Born To Hiv Positive Parents In Nevada, 1991-1999, Drew Mather, Mary Guinan, Richard Whitley, Wei Yang

School of Public Health Faculty Research

Background:

This report encompasses an effort to look at the number of children born to HIV (Human Immunodeficiency Virus) and/or AIDS (Acquired Immunodeficiency Syndrome) infected parents during the years 1991 to 1999 in Nevada.

According to the Healthy People 2000 (HP 2000) Review for the years 1998- 1999, infants of untreated or undetected HIV positive women have been identified as a distinct population at risk for contracting the virus that causes AIDS.

The State of Nevada’s Bureau of Disease Control and Intervention Services in collaboration with the Bureau of Health Planning and Statistics has taken the initial step to “cross …

College Sports Wagering: A Case Study About Gambling On College Athletics And The Motivations And Consequences Surrounding Legislation Wanting To Ban Wagering On College Sports, Neil H. Huffey

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sports wagering is the largest form of gambling in the world. In the United States, the practice is largely illegal. Nonetheless, it has sustained incredible growth both legally and illegally throughout the twentieth century. Current legislation in Congress would revise a 1992 federal law that banned legal sports wagering in this country with the exemption of four particular states, Nevada included. The state of Nevada is the only place in which wagering on college sports is legally practiced. The State of Oregon runs a small sports betting game out if its lottery. Proponents of the legislation suggest that passage is …

Unlv Magazine, Laurie Fruth, .

UNLV Magazine

No abstract provided.

Interchannel Coupling In The Photoionization Of The M-Shell Of Kr Well Above Threshold: Experiment And Theory, H. S. Chakraborty, D. L. Hansen, Oliver Hemmers, P. C. Deshmukh, P. Focke, I. A. Sellin, Clemens Heske, Dennis W. Lindle, S. T. Manson

Environmental Studies Faculty Publications

Photoionization cross sections and asymmetry (β) parameters for Kr 3s, 3p, and 3d subshells have been measured and calculated in the 300–1300-eV photon energy range. Good agreement between experiment and theory is found for both cross-section branching ratios and β parameters. Interchannel coupling among the channels arising from 3s, 3p, and 3d subshells is found to be necessary for quantitative accuracy of the theory. This shows that the interchannel coupling phenomenology far above threshold, found previously for outer shells of Ne and Ar, is also operative for inner atomic shells.

Clark County School District: Bonds And Debt. Can They Be Divided Equally?, Jocelyn Izumigawa

UNLV Theses, Dissertations, Professional Papers, and Capstones

Clark County School District is one of the largest school districts in the nation with a student population of 203,616 for 1998-1999. Talk of deconsolidating Clark County School District has been proposed by Assembly persons. However, as recent as November 2000, another initiative for deconsolidation and reconfigurations had not been approved by the voters. One of the issues surrounding deconsolidation is the district's bond debt. An equitable division has not been reached should Clark County School District deconsolidate. This paper deals with dividing the bond debt equally among eight districts (identified in an earlier study of deconsolidation) and assessing whether …

The Workforce Investment Act Of 1998: Implementation In The State Of Nsvada, Kimberly Meier

UNLV Theses, Dissertations, Professional Papers, and Capstones

The topic of this professional paper is the implementation of the Workforce Investment Act in the State of Nevada. I have prepared this paper for the Department of Public Administration in partial fulfillment of a Masters of Public Administration degree. The paper focuses on information gathered through interviews with various stakeholders including those providing services, those needing service and those who designed the plan for the State of Nevada. The data presented supports that the initial implementation was successful, however further study and analysis are required to determine long term effects. At the conclusion, suggestions to increase the effectiveness of …

Architecture Library Web Pages: The Instruction Dimension, Jeanne M. Brown

Library Faculty Research

Before getting into the “Instruction Dimension” let’s start with a brief timeline to provide some context. I have been working on my Internet Guide to Architecture and Building for many years now: since 1992 at least, since the time of gophers, and other arcane applications I can barely remember like archie and veronica. It wasn’t until 1995, five years ago, that I started an architecture library home page, with a guide to researching architects that included print and net sources and of course with the Internet Guide to Architecture and Building. It is difficult for me now to visualize those …

Patient Satisfaction In Managed Care, Veronda M. Finley

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this paper is to examine the use of patient satisfaction in Managed Care Organizations (MCOs). This will be achieved by reviewing the literature on managed care, patient satisfaction and the use of patient satisfaction in Managed Care Organizations. The author will also analyze how Health Alliance Plan (HAP) measures patient satisfaction and uses satisfaction data to improve their service. HAP is a Michigan based health maintenance organization (HMO). Lastly, the paper will give recommendation for improvements based upon the literature review and analysis of HAP.