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2000

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Interpretation Of Cone Penetration Test Data For Underconsolidated Clay, Jeffrey Alec Moss Jan 2000

Interpretation Of Cone Penetration Test Data For Underconsolidated Clay, Jeffrey Alec Moss

UNLV Retrospective Theses & Dissertations

In this study, cone penetration test data is correlated to vane shear and triaxial undrained shear strength test data for a saturated and underconsolidated marine clay. It is shown that cone penetration test data not corrected for pore pressures underestimates undrained shear strength. Additionally, small increases in the degree of consolidation of the underconsolidated clay increases the undrained shear strengths.

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Substitution Effects Of Metal Quinolate Chelate Materials For Organic Electroluminescence Applications, Asanga Bimalchandra Padmaperuma Jan 2000

Substitution Effects Of Metal Quinolate Chelate Materials For Organic Electroluminescence Applications, Asanga Bimalchandra Padmaperuma

UNLV Retrospective Theses & Dissertations

A technology that shows great promise for application in novel flat panel displays is based on electroluminescence (EL) of organic light-emitting devices (OLEDs). Aluminum tris(8-hydroxy quinoline) (Alq3)-type materials are very important as emitter materials in OLEDs. Systematic experimental and theoretical studies of these materials are crucial in order to elucidate the relationship between structure and function of EL materials and ultimately optimize device performance. It has been demonstrated both theoretically and experimentally that the photoluminescence (PL) emission energies of Alq 3 can be tuned by adding substituents to the quinolate ligand. The electronic and structural changes associated with such substitutions …

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Sodium Metasomatism And Magnesio-Riebeckite Mineralization In The Wilson Ridge Pluton, Deborah Ann Potts Jan 2000

Sodium Metasomatism And Magnesio-Riebeckite Mineralization In The Wilson Ridge Pluton, Deborah Ann Potts

UNLV Retrospective Theses & Dissertations

The Wilson Ridge pluton contains a rare occurrence of hydrothermal sodic amphibole. hydrothermal amphibole occurs as fracture coatings, veinlets, dense stockwork-type networks, and diffusive alteration fronts. Electron microprobe analyses of the hydrothermal amphibole reveal a range of Na-rich compositions, most notably magnesio-riebeckite. Magnesio-riebeckite in the Wilson Ridge pluton formed by Na-metasomatism related to subsolidus hydrothermal alteration involving Na-rich fluids of meteoric origin. Whole-rock geochemistry of samples from zones of hydrothermal amphibole show enrichment of Na2O (>9.6 wt. %) and depletion of K2O (0.15 wt. %) and CaO (2.4 wt. %) relative to unaltered host rock. Secondary fluid inclusions associated …

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Self-Management Of Chronic Pain By Patients With Arthritis, Joan K Rogers Jan 2000

Self-Management Of Chronic Pain By Patients With Arthritis, Joan K Rogers

UNLV Retrospective Theses & Dissertations

The insistent presence of pain for the millions of persons with rheumatoid arthritis and osteoarthritis can drastically reduce an individual's quality of life. Self-management approaches for arthritis pain relief are being emphasized and individuals needs a medley of pain management methods to select from to help manage arthritis pain; The Pain Management Inventory (PMI) was used in a descriptive design with a convenience sample (n = 91) to identify pain management methods individuals with arthritis use and find helpful. Exercising was the method used by the largest number of respondents and was also perceived as most helpful. The methods used …

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Automated Mammographic Mass Shape Classification Using Wavelets And Neural Networks, Nithya Shanmugam Jan 2000

Automated Mammographic Mass Shape Classification Using Wavelets And Neural Networks, Nithya Shanmugam

UNLV Retrospective Theses & Dissertations

The objective of the thesis is to demonstrate the utility of wavelet transforms with artificial neural networks for the classification of mammographic mass shapes. A fully automated mammographic classification system has been developed to distinctly classify mass shapes as either round, which typically indicates the absence of breast cancer, or irregular, which typically indicates the presence of cancer. First, a wavelet transform was applied to the radial distance measure (RDM) of the mass shapes to obtain multiscale decomposition. The discrete wavelet transform and wavelet packet decompositions were investigated. The second step was the computation of scalar-energy features from the wavelet …

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An Application Of Optimal Control Theory In Welfare Economics, Steven Ernest Scroggin Jan 2000

An Application Of Optimal Control Theory In Welfare Economics, Steven Ernest Scroggin

UNLV Retrospective Theses & Dissertations

We consider the maximization of a functional representing social welfare over continuous time. A social welfare functional (SWF) is an integral that models social welfare as a function of individual consumption, individual utility of consumption and the value of utility aggregated across individuals. A SWF may be subject to constraints in the form of differential or integral equations and inequalities, which represent the production possibilities of the economy. We solve the optimization problem by applying the Pontryagin maximum principle. We consider an autarky and a command economy. We explore the interaction of impatience and productivity in autarky and the implications …

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Pre-Service Secondary Mathematics Teachers' Attitudes About The History Of Mathematics, Kelly Marie Sullivan Jan 2000

Pre-Service Secondary Mathematics Teachers' Attitudes About The History Of Mathematics, Kelly Marie Sullivan

UNLV Retrospective Theses & Dissertations

This study was conducted to show that using historical material to teach mathematical content to pre-service secondary mathematics teachers could improve their attitudes about incorporating the history of mathematics into the mathematics classroom. A historical module from the Mathematical Association of America was taught to an undergraduate class of pre-service secondary mathematics teachers. Their attitudes regarding the use of the history of mathematics in the mathematics classroom were then compared to the attitudes of students in another undergraduate class, taught by the same researcher, whose instruction did not incorporate history. Results from t-tests indicate that there was a positive change …

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Characterization Of P-Type Silicon Semiconductor Detectors For Use In In Vivo Dosimetry, Kamran Ul Haq Jan 2000

Characterization Of P-Type Silicon Semiconductor Detectors For Use In In Vivo Dosimetry, Kamran Ul Haq

UNLV Retrospective Theses & Dissertations

The response of a p-type diode detector for use in patient dose monitoring in photon and electron fields was evaluated for a number of commonly-encountered clinical parameters. Effects of energy, field size, source-to-surface distance, presence of beam modifiers, beam orientation, and temperature were investigated. Shielding effects and batch variations were also examined. In most cases, diode performance was in good agreement with manufacturer's specifications and/or the results of others using similar detectors. Variations in excess of +/-12 % were observed in high-energy wedged fields over the source-to-surface distances investigated. Reductions in local dose directly behind the diode due to electron …

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A Transverse Fault In An Extended Terrane, The Currant Summit Fault, Nevada, Nathan David Williams Jan 2000

A Transverse Fault In An Extended Terrane, The Currant Summit Fault, Nevada, Nathan David Williams

UNLV Retrospective Theses & Dissertations

Transverse faults in extensional terranes strike parallel to subparallel to the extension direction, are laterally continuous, and terminate abruptly. Problems of transverse faults are addressed by analysis of the Currant Summit fault, an east-west striking fault in east-central Nevada; Mapping of rock units and structures allowed determination of the net slip along the Currant Summit fault. The slip was calculated from an offset anticlinal hinge. Motion is normal-left oblique with horizontal offset of 3300 m, throw of 1950 m and heave of 70 m. Geometric calculations and field data constrain the fault dip to ∼87° N; The name oblique-slip barrier …

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Acoustic Characteristics Of Fiberglass-Lined Circular Ducts, Luis A Villegas Jan 2000

Acoustic Characteristics Of Fiberglass-Lined Circular Ducts, Luis A Villegas

UNLV Retrospective Theses & Dissertations

Fiberglass lined circular ducts are circular ducts with an outer spiral metal shell. They are either dual-wall or single-wall. They have been acoustically treated and are intended to be used in heating, ventilation and air conditioning (HVAC) duct systems to reduce the amount of sound that is generated by the operation of the components of the system; To quantify the amount of the sound energy that can be attenuated by a given fiberglass lined circular duct, its acoustical performance has to be determined. Acoustical performance of lined ducts can be experimentally determined in an acoustical laboratory under controlled conditions. These …

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Pathways To Family Preservation Services, Rebecca Ann Carman Jan 2000

Pathways To Family Preservation Services, Rebecca Ann Carman

UNLV Retrospective Theses & Dissertations

The study examines the socio-demographics of families participating in Las Vegas, Nevada's Intensive Family Preservation Program, the crisis precipitators that these families experience, and the services that were directed at the identified crisis precipitators. A qualitative research design was utilized in the analysis of 15 case files. Majority of the families experienced the following crisis precipitators: problems in parenting, children's behavioral and emotional problems, financial problems, substance abuse, and parent's emotional problems. The data suggested that family preservation workers are providing services to address the identified precipitators. The conclusions of this study indicate that intensive family preservation programs could be …

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Casino Database Marketing And Market Segmentation In Las Vegas Hotel/Casinos, Anson Liu Jan 2000

Casino Database Marketing And Market Segmentation In Las Vegas Hotel/Casinos, Anson Liu

UNLV Retrospective Theses & Dissertations

This research is an exploratory study based upon a casino player database, which seeks to examine casino market segment behaviors and to investigate whether any relationships exist between demographics and profitability. It also seeks to establish whether the casino has effectively implemented its complimentary policies and player ratings. The study could not find any statistically significant relationships between demographics and profitability. However, notable patterns were found between these two variables. It also found that the rating system for this casino was inefficient and the players' theoretical win was overrated. A relationship was found between total complimentary expenses and theoretical win, …

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The Performers Alliance: Conflict And Change Within The Screen Actors Guild, Arthur Thomas Lynch Jan 2000

The Performers Alliance: Conflict And Change Within The Screen Actors Guild, Arthur Thomas Lynch

UNLV Retrospective Theses & Dissertations

This paper takes an historical critical research perspective on rapid change within one of the highest profile unions in the world, the Screen Actors Guild and in particular the emergence of a political force that identified itself as The Performers Alliance. The author was a member of the National Board of Directors of the Screen Actors Guild; Parallels were found in the development of SAG through various stages of its history. Rhetorical analysis sheds light on the development of the Guild as a social movement and of The Performers Alliance as a dissident movement within the union itself. An argument …

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United States Population Policies And Environmental Ethics: Addressing Population Growth From The Biocentric Perspective, Philip Davis Macwilliams Jan 2000

United States Population Policies And Environmental Ethics: Addressing Population Growth From The Biocentric Perspective, Philip Davis Macwilliams

UNLV Retrospective Theses & Dissertations

When the environmental movement began to surge in the 1960s, concerns were raised over the prospects of the U.S. population growing to an unsustainable level and causing irreparable harm to the environment and our quality of life. Unfortunately, population growth has not been given the priority it deserves not because it is not an important issue, but because of our failure to view population growth, and all environmental issues, from a biocentric outlook. It is this paradigm shift towards biocentrism that we as moral agents should be making and which will subsequently cause us to view population growth in a …

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Sex, Gender And Genesis: A Cixousian Exploration Of Language In The Gay Marriage Debates, Nancy Jean Martin Jan 2000

Sex, Gender And Genesis: A Cixousian Exploration Of Language In The Gay Marriage Debates, Nancy Jean Martin

UNLV Retrospective Theses & Dissertations

How does language structure patriarchy? How are gendered language and creation story imagery evidenced in contemporary debates on gay marriage? Helene Cixous suggests that Western thought is organized around binary, hierarchical oppositions---the most fundamental of which are male over female and masculine over feminine. Language and its connections to psychological and her/historical origins are central to her work. Cixous suggests that the separation of male and female, masculine and feminine, result in a war of sexual difference. I explore these themes with a feminist deconstruction of Internet sites in support of and against gay marriage. I then utilize Cixous's feminine …

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Petrogenetic Study Of The Porcupine Lake Mafic Intrusive Complex, Trinity Terrane, Northern California, Edward Robert Muller Jan 2000

Petrogenetic Study Of The Porcupine Lake Mafic Intrusive Complex, Trinity Terrane, Northern California, Edward Robert Muller

UNLV Retrospective Theses & Dissertations

The Early Devonian (404 +/- 3 Ma) Porcupine Lake mafic intrusive complex of the Trinity terrane consists primarily of ultramafic-mafic plutonic and dike lithologies. The plutonic rock forms steep intrusive contacts with adjacent Ordovician peridotite, and consists of basal layered peridotite, cumulate clinopyroxenite, and isotropic gabbro. East-west trending mafic-to-felsic aphanitic dikes intrude the plutonic rocks, with high dike concentrations (>80%) in the southern portion of the complex; Gabbro and mafic dikes display subduction-related enrichment of light-ion lithophile elements and high degrees of depletion of high-field strength elements (Nb, Ta ≅ 0.1 NMORB). Trace element mixing models indicate gabbro and …

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A Comparative Analysis Of Indonesian And Philippino Contraceptive Determinants And Use, Emily Dora Norman Jan 2000

A Comparative Analysis Of Indonesian And Philippino Contraceptive Determinants And Use, Emily Dora Norman

UNLV Retrospective Theses & Dissertations

This exploratory study investigates the contraceptive determinants affecting the variation behind different contraceptive use patterns in Indonesia and the Philippines. I analyze how much effect various determinants have on use patterns and whether these same determinants are relevant to a similar degree in both countries. Several demographic studies have indicated that while education and other socio-economic; variables play a large role in contraceptive use, other factors are pertinent as well. Physical access in terms of distance to a facility or ease in reaching it is one concept. In addition, informational access via availability of mass media and the related function …

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Evidence Of The Chumash Plank Canoe At Ca-Sba52, Santa Barbara County, California, Suzan Faye Rose Jan 2000

Evidence Of The Chumash Plank Canoe At Ca-Sba52, Santa Barbara County, California, Suzan Faye Rose

UNLV Retrospective Theses & Dissertations

The Chumash plank canoe or tomol, was an important part of the maritime subsistence pattern of the Chumash as well as an important element in the maintenance of a complex heirarchical socio-political structure. The placement in time of the origin of the tomol is critical to many models of culture change and cultural ecology in the Santa Barbara Channel area. The assemblage of artifacts and features at CA-SBa-52 on the Goleta Slough adds to the body of data regarding the development of the tomol and indicates that it may have had a longer history in the area than previously suspected.

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Heat Shock Protein 27 Inhibition Of The Caspase Cascade In Human Breast Cancer Cells, Lewis Joe Stafford Jan 2000

Heat Shock Protein 27 Inhibition Of The Caspase Cascade In Human Breast Cancer Cells, Lewis Joe Stafford

UNLV Retrospective Theses & Dissertations

Cells may die via a programmed cell death called apoptosis. Apoptosis can be triggered by many death signals, some of which cause cytochrome c to be released from the mitochondria initiating the caspase cascade. When there is an over-expression of Heat Shock Protein 27 (HSP27), the cell does not obey the death signals that it receives. In this study, the molecular mechanism for the HSP 27 inhibition of the caspase cascade is described in human breast cancer cells that were engineered to constitutively express HSP 27. HSP 27 directly bound to cytochrome c and inhibited the activation of caspase 9 …

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The Removal Of Perchlorate From Waters Using Ion-Exchange Resins, Adriano Rosa Vieira Jan 2000

The Removal Of Perchlorate From Waters Using Ion-Exchange Resins, Adriano Rosa Vieira

UNLV Retrospective Theses & Dissertations

This thesis investigates the feasibility of using several types of ion-exchange resins to remove perchlorate from waters. The capability of the resins to remove perchlorate, as well as their regeneration efficiency, were evaluated using both synthetic solutions and perchlorate-contaminated water from the Las Vegas Valley. For synthetic solutions, styrenic strong base resins showed high perchlorate removal efficiency but regeneration efficiency was low. Acrylic strong-base resins showed satisfactory perchlorate removal, but they regenerate better than the styrenic counterpart. Acrylic weak base resin showed satisfactory perchlorate removal efficiency and very high regeneration efficiency when regenerated with NaCl or caustic solutions. High concentrations …

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A Study Of Relationships Between Job Satisfaction And Organizational Commitment Among Restaurant Employees, David Anthony Vondrasek Jan 2000

A Study Of Relationships Between Job Satisfaction And Organizational Commitment Among Restaurant Employees, David Anthony Vondrasek

UNLV Retrospective Theses & Dissertations

Purpose. The purpose of this study is to gain a better understanding of the relationship of job satisfaction and organizational commitment within two locations of a national restaurant chain in Clark County, Nevada. This research attempts to uncover the basic characteristics and attitudes of food and beverage employees. Through a survey instrument, this study will reveal some of the homogeneous traits these employees exhibit; Methodology. Through the research, two questions were addressed. The first research questions was: Are there any demographic traits of these restaurant employees that significantly affect their job satisfaction? The second research question addressed was: Do restaurant …

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On Speech Processing, Ying Yang Jan 2000

On Speech Processing, Ying Yang

UNLV Retrospective Theses & Dissertations

Speaking is one of the most important ways of communication between humans. Speech processing refers to the technology of speech signal transformations for more efficient storage and transmission, for enhanced intelligibility and ease of assimilation. According to the different purpose as above, technologies on speech signal processing falls into three main categories. They are speech coding, speech recognition and speech synthesis; This thesis shows the experience of our approaching in this area. It focused on analyzing the different characteristics of speech by using mathematical and statistical methods. A test based on lagl product of signals was taken for separating the …

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Noah Webster Spelled Out, Barbara Youngblood Jan 2000

Noah Webster Spelled Out, Barbara Youngblood

UNLV Retrospective Theses & Dissertations

My research of Noah Webster, his moral beliefs, his religious conversion, his political persuasions, and his voluminous writings, has indisputably revealed that Webster intended to shape the entire American nation through his writings and through its public education system. Relying primarily on Webster's early works and his dictionary (1828), I discovered his strong convictions against slavery, his promotion of formal education for women, his moral biases, his political character, and his ardent support for an independent American republic; The thesis that evolved is developed in five chapters beginning with a characterization of Webster in Chapter One, describing his profound patriotism …

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Hamlet: Red, An Adaptation, Noelle Christine Youngblood Jan 2000

Hamlet: Red, An Adaptation, Noelle Christine Youngblood

UNLV Retrospective Theses & Dissertations

Hamlet: Red, an adaptation proposes an in-depth method of teaching Shakespeare's works by reconstructing the literature so it is relative to the cultural context of its students. This proposal focuses specifically on Hamlet as studied by at-risk middle schoolers. Beginning with a vital teacher-student rapport, the process continues through selection of a text based upon the dynamics of the students, analysis and rewriting of that text based upon its themes that relate to the students, and final production of the completed adaptation; Complexities arise when teachers, concerned with positively influencing each of their students, are faced with tremendous diversity in …

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Kinematics And Timing Of The Pinto Shear Zone, New York Mountains, Northeastern Mojave Desert, California, Mengesha Assefa Beyene Jan 2000

Kinematics And Timing Of The Pinto Shear Zone, New York Mountains, Northeastern Mojave Desert, California, Mengesha Assefa Beyene

UNLV Retrospective Theses & Dissertations

New studies of the Pinto shear zone, New York Mountains, California, improve our understanding of the importance of Mesozoic extension in Mojave Desert and also contribute to the growing body of evidence for syncontractional extension in the Mesozoic Sevier orogen. The Pinto shear zone has a Z-shaped map pattern and foliation in the ∼92--97 Ma Mid Hills adamellite of the Pinto shear zone generally dips 20--65° S and SW. Sense of shear indicators demonstrate top-to-the S-SW shearing, parallel to a S-SW plunging lineation, suggesting the Pinto shear zone is a normal fault. Hanging-wall deformation is accommodated by antithetic high-angle faulting …

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The Relationship Between The Health-Promoting Practices Of Advanced Practice Nurses And Their Counseling Of Patients, Wanda Marie Boyer Jan 2000

The Relationship Between The Health-Promoting Practices Of Advanced Practice Nurses And Their Counseling Of Patients, Wanda Marie Boyer

UNLV Retrospective Theses & Dissertations

Among healthcare professionals, there is little research on health promotion and health-promoting practices, particularly advanced practice nurses (APN's) The literature also reveals a paucity of research on the counseling practices of APN's. The purpose of this descriptive, correlational study was to examine the relationships between selected variables, derived from Pender's revised Health Promotion Model (1996), and the degree to which they explain advanced practice nurses' current practice of health-promoting behaviors from a random sample of APN's (N = 357). The random sample was obtained from the American Academy of Nurse Practitioners. The study also described the relationship between these behaviors …

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Bioinformatic Analysis: Retroposon Sequences Containing Multiple Putative Endonucleases, Seanna Kathleen Corro Jan 2000

Bioinformatic Analysis: Retroposon Sequences Containing Multiple Putative Endonucleases, Seanna Kathleen Corro

UNLV Retrospective Theses & Dissertations

Among the retroposons, the source of the endonuclease activity is known to be variable. We investigated whether any retroposon genomes encode potential multiple endonuclease functions. Amino acid alignments were generated to reveal the presence of the characterized ordered-series-of-motifs (OSM) that define four different endonuclease functions. These endonuclease functions include a retroviral-like integrase (IN), an apurinic-apyrimidinic endonuclease (APE), the PDD endonuclease recently identified in the R2BM retroposon and an HNH endonuclease signature conserved by the group 11 intron sequences. The results indicate that the spliced l eader associated conserved sequences (SLACS) of T. brucei, c ruzi-associated retrotransposon (CZAR) of Trypanosoma cruzi, …

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An Analysis Of Interconnection Network Effects Of Dynamic Element Matching Digital-To-Analog Converters, Hui Fu Jan 2000

An Analysis Of Interconnection Network Effects Of Dynamic Element Matching Digital-To-Analog Converters, Hui Fu

UNLV Retrospective Theses & Dissertations

Digital-to-Analog Converters (DACs) convert digital signals into analog signals and thereby provide the link from digital systems to the analog world. Many DAC architectures use matched components to convert signals. However, practical DACs contain mismatched circuit components that cause nonlinear errors in the DAC's analog output signal. Dynamic Element Matching (DEM) is a method that can eliminate or reduce the effects of mismatch errors. In this thesis, DEM algorithms applied to a specific DEM DAC architecture that use several interconnection networks, including the Barrel Shifting network, the Generalized-Cube network, the Omega network and the Indirect Binary n-cube network, are mathematically …

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The Phenomenal Meaning Of Romantic Love, Howard Roden Giles Jan 2000

The Phenomenal Meaning Of Romantic Love, Howard Roden Giles

UNLV Retrospective Theses & Dissertations

The phenomenal meaning of romantic love is sought, using the descriptions of co-researchers. A brief discussion of the theoretical underpinnings of phenomenology is provided, and the methods of phenomenological psychology are outlined. The specific methods for arriving at the phenomenal meaning of romantic love are chosen. Six coresearchers were interviewed to elucidate lived-experiences they had with romantic Love The interviews were transcribed into six protocols. The six protocols are phenomenologically reduced into meaning units and their essences. The essences are presented within the context of the protocols. Twenty essential structures are presented in five meaningful groups, including Descriptions, Events, Temporal …

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A Comparison Of Ground Reaction Forces During Running And Form Skipping, Samuel Thomas Johnson Jan 2000

A Comparison Of Ground Reaction Forces During Running And Form Skipping, Samuel Thomas Johnson

UNLV Retrospective Theses & Dissertations

Following lower extremity injury an athlete may be able to walk within days, however they may not be capable of running for weeks or even months. During this time, the athletic trainer provides the athlete with progressions to running. One activity that has been used successfully in this progression is the form skip. It remains unknown why the athlete is capable of successfully performing the form skip before they can run; The purpose of this study was to investigate the ground reaction forces (GRF) during form skipping and running. Healthy subjects (N = 9) ran and skipped across the force …

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