Digital Commons Network^™

Design And Evaluation Of Processes For Fuel Fabrication, Georg F. Mauer

Fuels Campaign (TRP)

One of the primary concerns in selecting a fuel matrix for actinide-bearing fuels, such as those for transmutation systems, is fuel fabrication. Fuel fabrication technologies for the fabrication and re-fabrication processes must meet several technical considerations, such as minimizing secondary radioactive waste streams, economic viability, reasonable capital outlay, and must be easy to maintain over the transmuter core life cycle. Additionally, the fuel type chosen must be easily manufactured in a remote environment. The volatile behavior of americium during thermal processing further complicates these goals. Currently, the national program is investigating a number of candidate fuel matrices: metallic, ceramic, dispersion, …

Biological Reduction Of Perchlorate In Ion Exchange Regenerant Solutions Containing High Salinity And Ammonium Levels, Tina M. Gingras, Jacimaria R. Batista

Civil and Environmental Engineering and Construction Faculty Research

The most promising technologies to remove perchlorate from water are ion exchange and biological reduction. Although successful, ion exchange only separates perchlorate from water; it does not eliminate it from the environment. The waste streams from these systems contain the caustic or saline regenerant solutions used in the process as well as high levels of perchlorate. Biological reduction could be used to treat the regenerant waste solutions from the ion exchange process. A treatment scheme, combining ion exchange and biodegradation, is proposed to completely remove perchlorate from the environment. Perchlorate-laden resins generate brines containing salt concentrations up to 6% or …

An Alternative Approach To Measuring Consumer Discrimination In The Market For Baseball Cards, Adam Neil Rabinowitz

UNLV Retrospective Theses & Dissertations

The effect of consumer racial discrimination in the market for baseball cards has previously been examined (Nardinelli and Simon, 1990; Andersen and La Croix, 1991; Gabriel, et al., 1995; Gabriel, et al., 1999; McGarrity, et al., 1999; and Fort and Gill, 2000). Significant differences in the model specification and data are found throughout the literature, resulting in very mixed findings. The following study attempts to improve on these specifications by replicating the existing work and adding important missing variables. I find specification matters and consumer discrimination exists in this market. In addition, auction data are used to explore an alternative …

Loop Detection And Prevention Mechanism In Multiprotocol Label Switching, Vasu Jolly

UNLV Retrospective Theses & Dissertations

The extended color thread algorithm is based on running a thread hop by hop before the labels are distributed inside a MPLS Cloud Since the path for the data packets is set beforehand, the loop formation occurs at the control path. The shortest paths between selected source and destination have been calculated using Dijkstra's shortest path algorithm and threads are allowed to extend through the routers. With the passage of each next hop, a distributed procedure is executed within the thread, generating a unique color at nodes. This keeps a track on router's control path and at the same time …

Maximizing The Impact Of Sponsorship: An Examination Of Sponsorship On Attendees' Recognition Of Sponsors And Their Attitudes Toward Corporate Sponsorship, Eunju Suh

UNLV Retrospective Theses & Dissertations

The purpose of this study was to measure the impact of sponsorships on trade show attendees. This study sought to understand whether different types of sponsorships, number of days attending at a show, and demographic characteristics differently influenced attendees' recognition of sponsors and their overall attitudes toward corporate sponsorship; For this study, a questionnaire was designed to measure trade show attendees' recognition of sponsoring companies, overall attitudes toward sponsorship, preferences for specific sponsorship types, and demographic information. Attendees were queried while exiting the Association of Progressive Rental Organizations' Convention and Trade show (APRO) in Las Vegas from July 24 and …

‘Sworn’ Versus ‘Civilian’ Career Development Paths In The Fire Service In Nevada, Kelly Blackmon

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Clark County Fire Department has no formal career development path for fire prevention (civilian) personnel as it does for suppression (sworn) personnel. The purpose of this paper is to compare the career paths developed for suppression personnel and prevention personnel in five fire departments throughout the State of Nevada. Each department was chosen because they have over 100 total employees. Three dimensions relevant to the extent to which a career development path exists were identified and each department was assessed terms of these dimensions. The results illustrated the need to enhance the career development path in prevention to more …

Modeling, Fabrication, And Optimization Of Niobium Cavities: Phase Ii Second Quarterly Report, Robert A. Schill Jr., Mohamed Trabia

Transmutation Sciences Materials (TRP)

Niobium cavities are important parts of the integrated NC/SC high-power linacs. Over the years, researchers in several countries have tested various cavity shapes. They concluded that elliptically shaped cells are the most appropriate shape for superconducting cavities. The need for very clean surfaces lead to the use of a buffered chemical polishing produce for surface cleaning to get good performance of the cavities. Up to this point, the second phase has resulted in the design of an experimental setup for the fluid flow experiment. Other experimental activities include the evaluation of a vacuum system are underway. Little reportable progress has …

Exploring The Limits Of The Dipole Approximation With Angle-Resolved Electron Time-Of-Flight Spectrometry, Sierra Laidman, Monica Pangilinan, Renaud Guillemin, Sung Woo Yu, Gunnar Ohrwall, Dennis W. Lindle, Oliver Hemmers

Environmental Studies Faculty Publications

Understanding the electronic structure of atoms and molecules is fundamental in determining their basic properties as well as the interactions that occur with different particles such as light. One such interaction is single photoionization; a process in which a photon collides with an atom or molecule and an electron with a certain kinetic energy is emitted, leaving behind a residual ion. Theoretical models of electronic structures use the dipole approximation to simplify x-ray interactions by assuming that the electromagnetic field of the radiation, expressed as a Taylor-series expansion, can be simplified by using only the first term. It has been …

Mammal And Bird Trackways In The Miocene Horse Spring Formation, Clark County, Nevada, Michele Marie Jones

UNLV Retrospective Theses & Dissertations

The Thumb Member of the Miocene Horse Spring Formation contains a vertebrate track assemblage of mammal (camel and carnivore) and avian footprints. Camelid tracks identified are Lamaichnum alfi, Lamaichnum macropodum, and Lamaichnum etoromorphum. Carnivore tracks include canid tracks (Canipeda sp.) and a possible felid track ( Felipeda? sp.). One canid trackway records a c-shaped pattern, which is apparently the fist documentation of a rotary gallop gait in Miocene canids. Five types of bird tracks, four of which are previously undescribed, also occur. They are: (1) Alaripeda lofgreni, (2) Avipeda sp. A, (3) Avipeda sp. B, (4) Anatipeda sp. A, and …

Using Diffuse Idiopathic Skeletal Hyperostosis To Determine Age At Death, Jennifer Elizabeth Riddle

UNLV Retrospective Theses & Dissertations

This research took an age-related condition, diffuse idiopathic skeletal hyperostosis (DISH) and used it to create a new technique for estimating the age at death of older human skeletal remains (age ≥40). Diffuse idiopathic skeletal hyperostosis is a condition characterized spinally by ossification of the anterior longitudinal ligament resulting in fusion of vertebrae; and extraspinally by enthesopathies, ossification at sites of ligament or muscle attachments. Using the Terry Collection, housed at the Smithsonian Institution, National Museum of Natural History, 1728 human skeletons of known age at death were analyzed looking for evidence of spinal DISH. Found in 94 individuals, the …

Determination Of Mass Excavation Haul Distance And Direction By Linear Optimization, Donald Scott Myers

UNLV Retrospective Theses & Dissertations

This thesis develops a two-dimensional grid system for the determination of the haul distance and direction to haul the soil on a mass excavation project using linear optimization programming methodology. The system generates a mathematical solution for the minimum haul distance and the direction in which to haul the soil for each unit of the program grid when formulated with the proper input. The necessary inputs are the calculated cut and fill quantities for each cell of an X-Y coordinate grid system. The mathematical outputs from the cut and fill inputs are converted into a vector drawing indicating the quantity …

Thirteen Texts Every Student Must Read To Have A Well-Rounded High School Theatre Education, Gary Bernard Sessa

UNLV Retrospective Theses & Dissertations

This thesis is a discussion of theatre literature and its place in the high school curriculum. Until now, no one has published what specific theatre texts should be taught to students in high school before they graduate. However, with national standards paving the way for the future of education, and the idea that no child will be left behind, every curriculum, not just the core ones, needs to have a list of required reading before a student graduates from high school. This is the only way to insure a well-rounded high school education in theatre. Thirteen diverse texts ranging from …

Analysis Of Two Methods Of Isometric Muscle Contractions During The Anti-G Straining Maneuver, Lance Lorenzo Annicelli

UNLV Retrospective Theses & Dissertations

This study investigated the difference in Mean Arterial Pressure (MAP) and Cardiac Output (CO) between two methods of isometric muscle contractions during the Anti-G Straining Maneuver (AGSM). 12 subjects (ages 18 to 38 yrs, height 176.8 +/- 7.4 cm, body mass 78.8 +/- 15.6 kg, percent body fat 14.3 +/- 6.6%) participated in the study. The study was a one-way within-subject design with test conditions counterbalanced. Two methods of isometric muscle contractions lasting 30 seconds each were assessed; an isometric push contraction and an isometric muscle tensing contraction. The dependent parameters were MAP and CO. The average MAP during the …

The Influence Of Denitrification In Clarifiers On Biological Phosphorus Removal At Ccsd Plant, Prithviraj Vasantrao Chavan

UNLV Retrospective Theses & Dissertations

Denitrification in biological reactors has been widely studied, whereas, little is known about denitrification occurring in secondary clarifiers. In this study an attempt was made to study denitrification occurring within a secondary clarifier at the Clark County Sanitation District (CCSD) wastewater treatment plant, Las Vegas. The results obtained from this study showed that denitrification and phosphorus (P) release were occurring within the CCSD clarifiers. Dissolved oxygen (DO) and soluble COD concentrations were found to be the most influencing parameters on denitrification and P-release within the clarifiers. The results also showed that sludge blanket height (SBH), solid flux, and state point …

Evaluation Of Methods For Determining Bulk Specific Gravity Of Hma Specimens, Giovanni Icuspit Galacgac

UNLV Retrospective Theses & Dissertations

In this study, comparisons were made on the methods for bulk specific gravity measurements of rutted and unrutted Hot Mix Asphalt (HMA). Bulk specific gravity determination was performed using three methods: Water Displacement(TM), Parafilm(TM) and Corelok(TM). The evaluations were made on a total of sixty-two sets of two or three specimens, four different mix designs for rutted specimens, and three different mix designs for the unrutted specimens. The bulk specific gravity test results were compared for similarity of the methods and repeatability of the measurements for each method. Analysis of the data showed that (1) for unrutted specimens, the bulk …

The Effect Of Mechanical Vibration On Acute Power Output In The Bench Press, Brach John Poston

UNLV Retrospective Theses & Dissertations

The purpose of this study was to investigate the effect of mechanical vibration on acute power output in the bench press. A total of 10 male subjects performed 3 sets of 3 reps of bench presses using a load equal to 70% one repetition maximum (1RM) on two occasions separated by 3 days. One occasion served as the experimental (vibration) condition while the other occasion served as the control (non-vibration) condition. The conditions differed due to a 30 second vibration stimulation period between bench press sets 2 and 3 in the experimental condition. The control condition incorporated a 30 second …

The Day-To-Day Reliability Of Resting Metabolic Rate, Amy Elizabeth Thompson

UNLV Retrospective Theses & Dissertations

This purpose of this study was to determine the day-to-day reliability of resting metabolic rate. 18 college students, (mean age 22 +/- 3.6 yrs, height 65.78 +/- 22.0 in., body mass 68.05 +/- 10.34 kg, percent body fat 23 +/- 6.5%) gave informed consent to participate in the study. RMR was measured on four separate days over a period of 14 days. Height, weight, and resting heart rate were also recorded on each testing day. Body composition was assessed on the first day. Energy intake, energy expenditure, and caffeine intake were controlled between days. Each test was done between 7 …

A Spectroscopic Analysis Of The Starburst Galaxies Ngc 3395 And Ngc 3396, Kenneth Plaks

UNLV Retrospective Theses & Dissertations

We have obtained ultraviolet and visible wavelength spectra of 31 bright star forming knots in the interacting galaxies NGC 3395 and NGC 3396 using the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope. The knots are possible super star clusters on the order of ∼100 pc diameter with measured metallicities on the order of 0.5--0.6 Z⊙ . The spectra are consistent with a massive production of hot young stars in a starburst; Ages of the starburst knots were calculated using several diagnostics from the Leitherer et al. Starburst 99 code (SB99) using an Initial Mass Function (IMF) with …

Mosquito Population Dynamics During The Establishment Phase Of A Constructed Desert Wetland, April Newman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Nature Preserve at the Clark County Wetlands Park is a constructed wetland that has the potential to produce new mosquito habitat. This thesis evaluates the potential for the development of a mosquito problem at the newly constructed wetland system by assessing the population dynamics of mosquitoes within the Nature Preserve. Based on data collected from May 2001 through January 2002, I describe fluctuations in mosquito genus and relative abundance during the first summer through winter period of wetland development.

University Of Nevada, Las Vegas Advanced Accelerator Applications University Participation Program: Quarterly Report, Third Quarter (September To November 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 (DOE) as described in the UNLV AAA proposal and Statement of Work for the Third Quarter.

The UNLV AAA UPP Director implements the program’s administration using staff from the Harry Reid Center for Environmental Studies (HRC) to ensure that work conducted under the UNLV AAA UPP meets program objectives. The UNLV AAA UPP consists of three components: Program Support, Research Infrastructure Augmentation, and Student Research.

Water Policy And Theoretical Models: Political, Bureaucratic And Class Dynamics In A Growth Economy, Kelly Michelle De Vine

UNLV Retrospective Theses & Dissertations

Water Policy and Theoretical Models: Political, Bureaucratic and Class Dynamics in a Growth Economy explores the three major socio-political theories of the state and public policy: pluralism, elite/managerialism and class-dialecticism using a case study of a series of policy decisions and outcomes during the period from 1989 to 1995 related to the Las Vegas Valley Water District which serves Las Vegas, Nevada. This time period is important due to the unprecedented levels of population growth experienced in the Las Vegas Valley and due to the extreme scarcity of water resources. This case study explores the issues of popular politics, bureaucratic …

Radiation Transport Modeling Of Beam-Target Experiments For The Aaa Project: Quaterly Report, William Culbreth

Reactor Campaign (TRP)

The national development of technology to transmute nuclear waste depends upon the generation of high energy neutrons produced by proton spallation. Proton accelerators, such as LANSCE at the Los Alamos National Laboratory, are capable of producing 800 MeV protons. By bombarding a lead/bismuth target, each proton may generate 500 or more neutrons that can activate fission products or induce the fission of transuranic isotopes.

The Monte Carlo radiation transport code MCNPX developed at LANL is an important tool in the design of transmuter technology. It must be validated, however, for the neutron energy that will be employed. Experiments are being …

Nuclear Criticality Analyses Of Separations Processes For The Transmutation Fuel Cycle: Quaterly Report, William Culbreth, Pang Tao

Separations Campaign (TRP)

During the first quarter of the work, the tasks included training students in the use of Monte Carlo codes used in radiation transport studies and the assessment of neutron multiplication factors for specific problems outlined by ANL-East through Drs. Laidler and Vandegrift.

The proposal also included objectives for the first year of work on this project, as listed below. The work conducted in the first quarter of the project was in partial completion of these objectives.

• Train UNLV students in the use of SCALE and/or MCNP for the assessment of nuclear criticality.

• Assess neutron multiplication factor, k_{eff …}

Large Nondipole Effects In The Angular Distributions Of K-Shell Photoelectrons From Molecular Nitrogen, Oliver Hemmers, H. Wang, P. Focke, I. A. Sellin, Dennis W. Lindle, J. C. Arce, J. A. Sheehy, P. W. Langhoff

Environmental Studies Faculty Publications

Measurements of angular distributions of K-shell electrons photoejected from molecular nitrogen are reported which reveal large deviations at relatively low photon energies ( ħω≤500eV) from emission patterns anticipated from the dipole approximation to interactions between radiation and matter. A concomitant theoretical analysis incorporating the effects of electromagnetic retardation attributes the observed large nondipole behaviors in N₂ to bond-length-dependent terms in the E1⊗(E2,M1) photoelectron emission amplitudes which are indicative of a potentially universal nondipole behavior in molecular photoionization.

Inside Unlv, Diane Russell, Jennifer Vaughan, Richard Jensen, Mae Worthey-Flennoy

Inside UNLV

No abstract provided.

Top Female Hospital Executives In Las Vegas, Nevada: An In Depth Case Study, Caroline R. Copeland

UNLV Theses, Dissertations, Professional Papers, and Capstones

This paper will review the findings of in depth interviews with the four top female executives for the acute care hospitals in Las Vegas, Nevada, with regards to the ‘Glass Ceiling’ phenomenon, stereotyping and gender role behaviors, and how these elements have affected their careers. Out of seventeen (17) local senior executive positions, women hold four of these positions, or twenty-three percent (23.5%), compared to six percent (6%) nationally. The healthcare system changes were also a consideration for theses female executives, and how these changes have influenced their careers.

Tales Of Other Times: A Survey Of British Historical Fiction 1770-1812, Anne H. Stevens

English Faculty Research

The years 1760–1820 mark a turning point in the history of historiography. Methods for studying the past changed rapidly during this period, as did the forms in which historical knowledge was displayed. Hume famously called these years ‘the historical age’, while Foucault’s Order of Things contends that an epistemic shift from ‘order’ to ‘history’ took place around the year 1800. The historical novel, possibly the most important generic innovation of Romantic-era fiction, is also the most important and underexplored historiographic innovation of these years. Its importance has not often been recognised, however, since, following the nineteenth-century establishment of an autonomous …

The Suitability Of Reclaimed Agricultural Lands Along The Lower Colorado River For Native Riparian Habitat Restoration, Patti Aaron

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this paper is to determine the suitability of agricultural lands for use in native riparian restoration efforts under development for the Lower Colorado River Multi-Species Conservation Program. Assuming these fields are productive for crops, would they be productive for cottonwood-willow restoration? There are two aspects to consider: (1) the edaphic conditions required for three major LCR agricultural crops; alfalfa, cotton, and wheat, and (2) whether those conditions are consistent with the conditions required for the restoration of native LCR riparian habitat, primarily Fremont cottonwood (Populus fremontii) and Goodding willow (Salix gooddingii). Using the case study research approach …

Challenges For The New West: Economic Impacts Of Wilderness In Nevada's Rural Counties, Lesley Regina Argo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Public lands designated as part of the National Wilderness Preservation System are removed from multiple-use management for protection of their natural condition. Opponents argue that "locking up" the natural resources on these lands through designation will undermine the rural economies in the west that are dependent upon extractive industries such as mining and logging. Proponents argue that the "Old West" reliance on extractive industries is declining and, in the "New West", wilderness promotes economic development in rural communities by preserving the amenity values that draw population and employment to the region. Characteristics of Nevada's economy, population and land challenge the …

Design And Evaluation Of Processes For Fuel Fabrication: Quarterly Progress Report #1, Georg F. Mauer

Fuels Campaign (TRP)

The first three months of the project covered the following:

• Literature review: A comprehensive study of the pertinent publications pertaining to transmuter fuels composition and manufacturing processes was conducted.

• Visit at ANL West in Idaho Falls, ID: Dr. Mauer visited the ANL West facility and met with his National Laboratory Collaborator, Dr. Mitchell K. Meyer, Group Leader, Fabrication Development on October 14 and 15, 2001.

• Student Paper Presentation at the ANS Annual Meeting by Ph.D. student Mr. Jae-Kyu Lee. Title: Transmuter Fuel Fabrication Processes.