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Determination Of Ground-Water Tracer 2,6-Difluorobenzoic Acid By Gc/Ms, Cong Han
Determination Of Ground-Water Tracer 2,6-Difluorobenzoic Acid By Gc/Ms, Cong Han
UNLV Retrospective Theses & Dissertations
In this study, a GC analytical method for the determination of the ground water tracer, 2,6-difluorobenzoic acid (2,6-DFBA) at the part per billion level was established. Three sample preparation methods, which include two methylation methods and one silylation method, have been evaluated. Chromatographic instruments including GC/MS, GC/ECD, and GC/FID have been used. Silylation of 2,6-DFBA combined with GC/MS analysis has proven to be the best method in this study, due to the low detection limits (part per trillion) achieved, and the stability of the 2,6-DFBA silyl derivative. A GC/MS instrument calibration curve was established, a C-well water sample was analyzed …
Eve And The Creation Cycle: Christina Rossetti's Reaction To John Milton's "Paradise Lost", Melanie Ann Hanson
Eve And The Creation Cycle: Christina Rossetti's Reaction To John Milton's "Paradise Lost", Melanie Ann Hanson
UNLV Retrospective Theses & Dissertations
Christina Rossetti's poetry is concerned with the image of woman as a creator and as a redeemer, the woman who has fallen from innocence and whose innocence is restored through participation in the creation/redemption cycle. Rossetti's writing reflects her personal experiences, her love of Dante's works, her interest in the Anglican sisterhood, her own Tractarian obsession, the influence of her association with the Pre-Raphaelite brotherhood, and most specifically, her reaction to Milton's depiction of Eve in Paradise Lost. She reconstructs Milton's Eve in her own poetry. This treatise will examine a selection of poetry by Christina Rossetti, in specific her …
Effects Of Discrete Wavelet Compression On Automated Mammographic Shape Recognition, Ravikiran Kalluri
Effects Of Discrete Wavelet Compression On Automated Mammographic Shape Recognition, Ravikiran Kalluri
UNLV Retrospective Theses & Dissertations
At present early detection is critical for the cure of breast cancer. Mammography is a breast screening technique which can detect breast cancer at the earliest possible stage. Mammographic lesions are typically classified into three shape classes, namely round, nodular and stellate. Presently this classification is done by experienced radiologists. In order to increase the speed and decrease the cost of diagnosis, automated recognition systems are being developed. This study analyses an automated classification procedure and its sensitivity to wavelet based image compression; In this study, the mammographic shape images are compressed using discrete wavelet compression and then classified using …
An Empirical Analysis Of The Reasons Why Guests Select And Return To Las Vegas Hotel/Casino Properties, Eileen Nancy Kennedy
An Empirical Analysis Of The Reasons Why Guests Select And Return To Las Vegas Hotel/Casino Properties, Eileen Nancy Kennedy
UNLV Retrospective Theses & Dissertations
The purpose of this thesis was to examine the reasons why guests select and return to Las Vegas hotel/casino properties. The study intended to investigate the importance of the host relationship in the guests' reasons for selection and return to a particular property; Current marketing research indicates that customer retention is directly related to satisfaction and individualized service experiences. For this reason, research topics were identified as relationship marketing, customer satisfaction versus retention, and loyalty management. Findings suggest that guests with hosts and guests without hosts tend to be comprised of the same demographic group. Casino guests with hosts demonstrated …
The Relationship Between Managerial Holdings And Performance: An Empirical Study On The Restaurant Industry, Young Kwi Kim
The Relationship Between Managerial Holdings And Performance: An Empirical Study On The Restaurant Industry, Young Kwi Kim
UNLV Retrospective Theses & Dissertations
The relationship between managerial stock holdings and performance, measured by profitability, operating efficiency, and stock return, was examined for the publicly traded restaurant companies during the period of 1995-1996. Additionally, the study investigated whether the degree of association between managerial ownership and performance, as measured by the same variables, differs across three groups identified by the range of managerial ownership; The empirical results support that managerial ownership has a positive impact on most of the performance variables (i.e. operating efficiency and profitability). Firm size, a control variable, was also found to be significantly associated with profitability, operating efficiency, and stock …
Toward Effective And Ethical Drug Abuse Prevention Policies: The Case Against Indiscriminate Drug Testing, Robert Eugene Gladd
Toward Effective And Ethical Drug Abuse Prevention Policies: The Case Against Indiscriminate Drug Testing, Robert Eugene Gladd
UNLV Retrospective Theses & Dissertations
For an increasing breadth of organizational domains, a negative illicit drug screen result has become the final and paramount criterion for admission and/or continuing participation. Such a policy is vigorously promoted to the private sector by government and vendors of testing services as an inexpensive and vital tool for suppressing drug abuse. This policy, however, can been shown to be at once empirically unwarranted, methodologically dubious, constitutionally impermissible, and ethically unsustainable. Reducing the harm attributable to illicit intoxication is a legitimate and worthy social goal. The ends, however, cannot justify such means of indiscriminate and intrusive surveillance.
A Comparative Study Of Honey Mesquite Woodlands In Southern Nevada And Their Use By Phainopeplas And Other Avian Species, Jeri Brastrup Krueger
A Comparative Study Of Honey Mesquite Woodlands In Southern Nevada And Their Use By Phainopeplas And Other Avian Species, Jeri Brastrup Krueger
UNLV Retrospective Theses & Dissertations
A study of four honey mesquite (Prosopis glandulosa var. torreyana) woodlands located at Moapa, Stewart Valley, Pahrump, and Stump Spring in southern Nevada was conducted to (1) describe the current condition of mesquite woodlands, (2) compare avian community indices among the four sites, and (3) locate breeding Phainopepla populations and determine breeding season, nesting success, and habitat requirements. Groundwater was closest to the surface at Stewart Valley, which contained the oldest and largest tRees Moapa had the greatest avian density and species richness for all species, and greatest species richness for breeding birds. No differences were detected in species diversity …
Howells, Dickinson, Lewis: An Exercise In Reading The Interracial Canon, Craig Andrew Magee
Howells, Dickinson, Lewis: An Exercise In Reading The Interracial Canon, Craig Andrew Magee
UNLV Retrospective Theses & Dissertations
Howells, Dickinson, Lewis: An Exercise in Reading the Interracial Canon has two purposes. First, it offers detailed readings of three American novels: An Imperative Duty by William Dean Howells (1891), What Answer? by Anna Dickinson (1868), and Kingsblood Royal by Sinclair Lewis (1947). These readings are accomplished within the context of the "interracial canon", a set of writings dealing with the expression of various aspects of interracial relationships. The interracial canon, as well as its specialized vocabulary and unique theoretical outlook, is roughly sketched in an introduction and several appendices.
Recovery And Regeneration Of Lithium Manganese Oxide From Spent Lithium-Ion Batteries, Santosh Mathew
Recovery And Regeneration Of Lithium Manganese Oxide From Spent Lithium-Ion Batteries, Santosh Mathew
UNLV Retrospective Theses & Dissertations
This study presents a method for recovering and regenerating Lithium Manganese Oxide (LMO) from spent Lithium-polymer batteries in order to recycle it in an environmentally friendly way. Two different processes for separating LMO were developed and the environmental impact of the two processes was analyzed. A process for relithiating the lithium-deficient LMO after recovery was also developed. Experiments were carried out to determine the regeneration chemical process parameters, and process conditions were optimized for the best spinel LMO formation. Various physical and chemical analysis of the regenerated LMO showed that its all major characteristics, such as crystal structure and manganese …
The Defense Intelligence Agency: An In-Depth Study Of The Development Of The Intelligence Agency, Stacie Delaine Neff
The Defense Intelligence Agency: An In-Depth Study Of The Development Of The Intelligence Agency, Stacie Delaine Neff
UNLV Retrospective Theses & Dissertations
This thesis will examine the history of intelligence leading to the creation of DIA, DIA's changing and emerging roles, its missions and organization, agency contribution during military operations, criticisms of the agency, and lastly the intelligence outlook for the future of DIA. Since its creation in 1961, DIA has undergone numerous reorganizations and this thesis will examine the history of intelligence leading to the creation of the attempts to streamline intelligence and provide the best product possible. Most of these changes have occurred after major campaigns in which intelligence either failed, was inaccurate or could have played a better or …
A Comparison Of Temper Characteristics Between Virgin Anasazi Black-On-Gray Bowl Rim Sherds And Plain Gray Jar Rim Sherds From Yama-2 And Yama-3, Laureen M Perry
A Comparison Of Temper Characteristics Between Virgin Anasazi Black-On-Gray Bowl Rim Sherds And Plain Gray Jar Rim Sherds From Yama-2 And Yama-3, Laureen M Perry
UNLV Retrospective Theses & Dissertations
Comparative analyses of Virgin Anasazi black-on-gray bowl and plain gray jar rim sherds from the sites of Yama-2 and Yama-3 show weak associations between those vessel forms and each of the following temper characteristics: temper sorting; temper percentage; temper angularity; and temper size. Black-on-gray bowl rim sherds mostly contain quartz and olivine temper and plain gray jar rim sherds contain more mixed sand, sherd and quartz/feldspar temper. Dates of A.D. 1050-1100 (mid-Pueblo II) with mixing from earlier periods are suggested for Yama-2 and Yama-3 with evidence of usage of the sites for habitation and storage.
Striptease: An Anthropological View, Angela Lee Ramsey
Striptease: An Anthropological View, Angela Lee Ramsey
UNLV Retrospective Theses & Dissertations
This following study serves as an attempt to apply theoretical questions to the phenomenon of striptease. I argue that striptease can be more fully understood as an act guided by the rules of performance. Strippers, and to a lesser extent the audience, can then be seen as actors employing a fantasy phase to sustain their respective roles within the charade of performance sex. Strippers and audiences are also players within the concept of performance itself, meaning they are simultaneously subject to and authors of the phenomenon. Using a biosocial approach, I explore the psychological, cultural, and physiological, etc., cues that …
Navigation System For A Mobile Robot Incorporating Trinocular Vision For Range Imaging, Kalyan Chakravarthy Pattisam
Navigation System For A Mobile Robot Incorporating Trinocular Vision For Range Imaging, Kalyan Chakravarthy Pattisam
UNLV Retrospective Theses & Dissertations
This research focuses on the development of software for the navigation of a mobile robot. The software developed to control the robot uses sensory data obtained from ultra sound, infra red and tactile sensors, along with depth maps using trinocular vision. Robot navigation programs were written to navigate the robot and were tested in a simulated environment as well as the real world. Data from the various sensors was read and successfully utilized in the control of the robot motion. Software was developed to obtain the range and bearing of the closest obstacle in sight using the trinocular vision system. …
Economic Feasibility Analysis Of Photovoltaic Installations In The Las Vegas Valley, Rinly Joseph
Economic Feasibility Analysis Of Photovoltaic Installations In The Las Vegas Valley, Rinly Joseph
UNLV Retrospective Theses & Dissertations
This thesis presents a new tool for performing an economic feasibility study of Photovoltaic (PV) power generation for Demand Side Management (DSM) as well as for a stand-alone system. The proposed analytical equations are capable of accommodating the constant changes in the system parameters due to the advances in new technologies and changes in electric utility industry. An economic feasibility study is conducted for photovolaic systems in both suburban areas and in remote locations using actual data collected by Nevada Power Company (NPC). With the present cost and cell efficiency, the study shows that the cost of the panels will …
A Comparison Of Elite Tennis Players' Motor Abilities With Those Of Elite Basketball, Soccer And Volleyball Players, Sarit Shalev
A Comparison Of Elite Tennis Players' Motor Abilities With Those Of Elite Basketball, Soccer And Volleyball Players, Sarit Shalev
UNLV Retrospective Theses & Dissertations
The difference in certain motor abilities was tested among four different groups of athletes. Specifically, this study compared elite tennis players' reaction time (RT), movement time (MT) and agility (AG), to soccer, basketball and volleyball players' MT, RT and AG; Thirty-three subjects were tested in the Wingate laboratory and tennis court. The laboratory tests included 25 trials of foot RT and MT recordings for each subject. These tests were conducted on a highly sensitive metal plate (a force plate that detects sensitive movement, e.g., a foot lifted of the plate) attached to a computerized device that records the RT and …
Nhetoric: Rhetorical Power In Cyberspace, David Paul Schulz
Nhetoric: Rhetorical Power In Cyberspace, David Paul Schulz
UNLV Retrospective Theses & Dissertations
The Alpha group is a faction of the white supremacy movement that has established a virtual presence in cyberspace. Rhetorical strategies of agitation are practiced by the Alpha group on the World Wide Web in an effort to encourage visiting avatars to join the white supremacy movement. This study explores the rhetorical strategies of power and promulgation which Alpha uses in cyberspace. Analysis of Alpha's digital discourse provide an opportunity to understand and evaluate the unique potentials that information technologies such as the World Wide Web bring to the rhetorical environment.
Application Of Cubic B-Splines To Boundary Value And Optimal Control Problems, Deborah Ann Skidmore
Application Of Cubic B-Splines To Boundary Value And Optimal Control Problems, Deborah Ann Skidmore
UNLV Retrospective Theses & Dissertations
In this thesis, a one-dimensional second order differential two-point boundary value problem will be approximated by a variational method using cubic B-splines. This method will then be extended to solving N-dimensional two-point boundary value problems. In the final part of the thesis, certain control problems will be converted into boundary value problems, which in turn, will be approximated by the previous variational method which uses cubic B-splines.
Tourist Victimization In And Around The Artificial Environment, Theodore R. Snodgrass
Tourist Victimization In And Around The Artificial Environment, Theodore R. Snodgrass
UNLV Retrospective Theses & Dissertations
Despite a new emphasis on tourism and the resulting victimization of travelers to the "artificial environments," such as those offered in Las Vegas and Orlando, little empirical research has been conducted to estimate the extent to which the traveler is victimized when in these different areas. Research reported in this paper is a result of a survey of travelers who were victimized in Southern Nevada, Clark County, during the summer of 1996; Information was gathered from questions which were asked on the survey and combined with data on the victim, which was taken off the victims' original crime reports. This …
Equilibrium Studies Of Ion Sorption On Zeolitized Tuff From Rainier Mesa, Nye County, Nevada, Derek Alan Sloop
Equilibrium Studies Of Ion Sorption On Zeolitized Tuff From Rainier Mesa, Nye County, Nevada, Derek Alan Sloop
UNLV Retrospective Theses & Dissertations
The partitioning of solutes between the solid mineral and aqueous phase frequently controls the fate and transport of contaminants in the subsurface environment. Consequently, parametric studies were performed to investigate the equilibrium sorption of Pb(II), Sr(II), CrO{dollar}\sb4\sp{2-}{dollar} and SeO{dollar}\sb3\sp{2-}{dollar} ions on zeolitized tuff from Rainier Mesa, Nevada, and on clinoptilolite from Jordan Valley, Oregon. The fractional uptake of the ions on the zeolitized tuff was investigated so that sorption isotherms and partitioning coefficients describing the affinity of the ions for the zeolitized tuff could be calculated. The fractional uptake of the ions on the clinoptilolite was investigated so that a …
A Study Of The Influence Of Physical Parameters On The Drying Of Porous Media, Jason C Viggato
A Study Of The Influence Of Physical Parameters On The Drying Of Porous Media, Jason C Viggato
UNLV Retrospective Theses & Dissertations
An experimental setup is developed to observe the mass transfer that occurs in the drying of saturated porous media due to bulk flow of gas. The analysis and equations are developed in a one-dimensional perspective, and focus on the convection and evaporation that results. Humidity readings are monitored at various locations and used in the analysis of the results. These procedures are used in test cases for Steel spheres and Ceramic beads both 4.5 mm in diameter at.25 L/min,.5 L/min,.75 L/min and 1 L/min flow rates; Drying times and humidity plots versus time for both steel and ceramic are witnessed …
Assessing Silica And Dissolved Oxygen Effects On Copper Corrosion Control In Southern Nevada Water Treatment And Supply System, Abdel-Rahman M Toubat
Assessing Silica And Dissolved Oxygen Effects On Copper Corrosion Control In Southern Nevada Water Treatment And Supply System, Abdel-Rahman M Toubat
UNLV Retrospective Theses & Dissertations
A pilot plant study was performed to investigate both the effect of silica on the corrosion process in the water system, and the effect of increased oxygen concentration resulting from ozonation on copper corrosion in the water system. The piping system used in the pilot plant resembled a household piping system, and consisted of four loops of copper pipes. Silica was added to the finished water before entering the loops at three different concentrations and corrosion was monitored by measuring copper concentration in first-draw weekly samples taken from the pilot system. Silica addition was monitored on a daily basis. Alkalinity, …
Development Of A Phosphotriesterase Enzyme Assay For Determination Of Organophosphate Pesticides, Yan Wang
Development Of A Phosphotriesterase Enzyme Assay For Determination Of Organophosphate Pesticides, Yan Wang
UNLV Retrospective Theses & Dissertations
Phosphotriesterase catalyzes the hydrolysis of a wide range of organophosphate insecticides such as paraoxon and parathion and nerve toxins such as soman and sarin. This project resulted in the development of novel phosphotriesterase enzyme assays to measure paraoxon and other representatives of the organophosphate pesticides. The assay is based on a substrate-dependent change in pH at the local vicinity of the enzyme. This enzyme, which was labeled with fluorescein isothiocyanate (FITC), was immobilized on polymethylmethacrylate beads and the pH change is monitored through the pH-sensitive quantum yield of FITC. Analytes were measured using a KinExA fluorescence analyzer. This assay can …
Development Of An Inexpensive Test System And Evaluation Of The Test Procedures For Conducting Vibration Tests On Antivibration Gloves Per Iso Standard 10819, Jason K Stein
UNLV Retrospective Theses & Dissertations
An inexpensive test system was developed for conducting vibration tests on vibration attenuating gloves using ISO Standard 10819: Mechanical Vibration and Shock--Hand-Arm Vibration--Method for the Measurement and Evaluation of the Vibration Transmissibility of Gloves at the Palm of the Hand. A small electromechanical shaker initially incapable of handling a 42-58 N static push applied to its handle during glove testing was modified using a simple air bladder so it could handle the required forces. Test procedures were developed to obtain the proper input acceleration levels delivered to the shaker's handle without using a feedback network. Using these procedures, a cross …
Drazin Inverse And Its Application To Linear Degenerate Systems, Trevor Allen Wilcox
Drazin Inverse And Its Application To Linear Degenerate Systems, Trevor Allen Wilcox
UNLV Retrospective Theses & Dissertations
In the thesis, we review some recent progresses on the study of Drazin inverses and the study of linear degenerate systems with nonsingular pencil. Properties of the Drazin inverse are discussed. An application of Drazin inverses to linear degenerate systems is presented. Furthermore, a numerical algorithm for calculating Drazin inverses and a FORTRAN program are provided.
Impact On Employee Motivation Of Management's Perception Of What Employees Want From Their Work: An Application To The Ski Resort Industry, Lisa Anne Ward
Impact On Employee Motivation Of Management's Perception Of What Employees Want From Their Work: An Application To The Ski Resort Industry, Lisa Anne Ward
UNLV Retrospective Theses & Dissertations
This study explored the impact managers' perceptions had on the motivation of ski resort employees. Hotel properties in Vail Valley, Colorado served as the population for the study. The study examined what ski resort employees want from their work and established their orientation to work. The relationship between what employees identified they wanted from their work and their motivation orientation was explored. In addition, the managers' perceptions of what they perceived their employees wanted from their work was measured and compared to what employees identified they wanted from their work. The impact of managers' perceptions was further identified with a …
Flexible Ac Transmission System Compensation On A Utility Transmission System, Julia Jesi Black
Flexible Ac Transmission System Compensation On A Utility Transmission System, Julia Jesi Black
UNLV Retrospective Theses & Dissertations
Power system security can be increased by the use of flexible AC Transmission System devices, FACTS, in transmission systems experiencing high power flows. This thesis presents an analysis of one of these devices, namely, a Thyristor Controlled Series Compensator, TCSC, as applied to the Nevada Power Company 230kV southern transmission network. The methodology for choosing the appropriate location for the device and equations to accurately analyze the TCSC are developed. The analysis of the utility network is divided into three stages: (1) development of a benchmark, pre-TCSC case, establishing the real and reactive power transfer capabilities of the network, (2) …
A Study Of Thermal Exchange In A Thermophotovoltaic (Tpv) System At Moderate Temperature, Yan Xu
A Study Of Thermal Exchange In A Thermophotovoltaic (Tpv) System At Moderate Temperature, Yan Xu
UNLV Retrospective Theses & Dissertations
A numerical simulation study is reported on the thermal exchange in an evacuated parallel-plate system consisting of an emitter and a photovoltaic (PV) material with the emitter temperature between 350K and 550K. Although higher temperature (and thus higher power output) thermophotovoltaic systems have been of interest previously, the focus here is on systems that can not achieve high temperatures, like micromachines. The study examines the electrical power output and power generation efficiency for four kinds of emissivity variations for the heat source coupled with three different compounds of {dollar}\rm In\sb{(x)}Ga\sb{(1-x)}As{dollar} PV materials. The results show that a 25% Ho YAG …
Casino Gambling's Proliferation Throughout The United States: A Case Study Of Legal Gaming In Louisiana, Kenneth Edward Burke
Casino Gambling's Proliferation Throughout The United States: A Case Study Of Legal Gaming In Louisiana, Kenneth Edward Burke
UNLV Retrospective Theses & Dissertations
Legal casino-style gambling has expanded dramatically in the United States during the 1990s. Casino Gambling's Proliferation Throughout the U.S.: A Case Study of Legal Gaming in Louisiana examines the causes for this sudden growth and the effects that introducing casino gambling has had on one state in particular, Louisiana. The paper will take you through a brief history of gambling from its earliest roots to its present place in our society. It will also provide a glimpse into what is in store for the gaming industry in the future.
Molecular-Dynamics Simulations Of Polymers In A Solvent, Anthony Jon Zukaitis
Molecular-Dynamics Simulations Of Polymers In A Solvent, Anthony Jon Zukaitis
UNLV Retrospective Theses & Dissertations
Molecular-dynamics simulations were carried out for linear, flexible polymers in a solvent environment. Both static and dynamic properties were calculated for polymer chains of 8, 16, 24, 32, and 40 monomers in length. The effects of solvent density on the diffusion coefficient, the average radius of gyration, and the average magnitude of the end-to-end distance vector of the polymer are studied. The same properties of loops or 'ring' polymers were studied by connecting the ends of the polymers together. We observed that the calculated properties scale with the number of monomers in a power-law form. The exponents of each quantity …
Voice-Interactive Computer Graphics And Games, Nataraj Jeedigunta
Voice-Interactive Computer Graphics And Games, Nataraj Jeedigunta
UNLV Retrospective Theses & Dissertations
The art and science of speech recognition have been advanced to the state where it is now possible to communicate reliably with a computer by speaking to it in a disciplined manner using a vocabulary of moderate size. There are many applications of speech recognition technology in telecommunications and other fields. Voice Interactive Computer Graphics And Games (VICGG) describes and emphasizes how voice recognition can be applied to design a real-time interactive graphics system. The VICGG system consists of a recognition module and a graphics module; The recognition module is used for isolated word recognition. Three separate implementations of recognition …