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Influence Of Grain Size Of A Porous Medium On The Movement Of Diesel Fuel Due To Water Table Fluctuations, Vasanthakumar Rajagopalan Jan 1995

Influence Of Grain Size Of A Porous Medium On The Movement Of Diesel Fuel Due To Water Table Fluctuations, Vasanthakumar Rajagopalan

UNLV Retrospective Theses & Dissertations

Experiments were conducted in a sand tank to determine the influence of grain size of a porous medium and residual water saturation on the movement of diesel fuel. Three different grades of sand (#12, #20, and #30 grades with mean grain diameters of 0.178cm, 0.08cm, and 0.056cm respectively) were used in the experiments. A water table was simulated and the sand above the capillary fringe was initially at residual water saturation. Diesel fuel (5 liters) was leaked into the sand, above the capillary fringe. A uniform, symmetrical pattern of diesel fuel smearing was observed for all the three grain sizes …

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An Integrated Systems Methodology For Pedestrian Traffic Flow Analysis, Richard Thomas Romer Jan 1995

An Integrated Systems Methodology For Pedestrian Traffic Flow Analysis, Richard Thomas Romer

UNLV Retrospective Theses & Dissertations

The typical urban pedestrian transportation system involves three basic elements: sidewalks or walkways; midblock or intersection corner, holding, or queueing areas; and pedestrian crossings of roads, rail lines, or other physical features. The pedestrians on sidewalks or walkways have operating characteristics analogous to motorized vehicles on roadways. Each critical pedestrian element has been considered individually, but not as a balanced system, especially at the most critical link--the signalized urban intersection; In this research, a methodology and guidelines have been developed to analyze existing pedestrian elements at a signalized intersection, i.e., the sidewalk, intersection corner, and crosswalk; with a systems approach …

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Adoption Anxiety Among Prospective Adoptive Parents, Stephanie A Robinson Jan 1995

Adoption Anxiety Among Prospective Adoptive Parents, Stephanie A Robinson

UNLV Retrospective Theses & Dissertations

Adoption has existed for thousands of years. Originally, the process was closed, i.e., the natural and the adopting parents did not have direct contact with one another. They remained anonymous. Recently, the process has opened up to include an open adoption, i.e., the natural and adopting parents meet each other before the adoption process is completed and they maintain contact with each other thereafter. This has created some anxiety among the prospective adoptive parents regarding the possibility that their contact with the birth mother may somehow create a problem or spoil a successful adoption from taking place. Anxiety surrounding this …

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Determination Of Formaldehyde By Ion Exclusion And Ion Exchange Separation With Amperometric Detection, Yilin Shi Jan 1995

Determination Of Formaldehyde By Ion Exclusion And Ion Exchange Separation With Amperometric Detection, Yilin Shi

UNLV Retrospective Theses & Dissertations

A method has been developed for determination of formaldehyde in air sample extracts by ion exclusion and ion exchange separation followed by amperometric detection. Optimum eluant compositions and separation columns for the best separation have been determined, as well as the optimum working electrode, electrolytes, and applied potentials for the best detection. An internal standardization was used to correct for detector drift. An interference study was performed for organic acids, other aldehydes, and alcohols. Using impingers containing aqueous bisulfite solution for collection, a side by side comparison study with the 2,4-DNPH method (also using impingers) was conducted. The detection limit …

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Experimental Hydrodynamic Study Of The Slurry Distribution In A Vertical Slurry Heat Exchanger, Cheng Tsu Shih Jan 1995

Experimental Hydrodynamic Study Of The Slurry Distribution In A Vertical Slurry Heat Exchanger, Cheng Tsu Shih

UNLV Retrospective Theses & Dissertations

A slurry heat exchanger is simulated as part of the Solvent Refined Coal-I plant to preheat the coal and solvent slurry before hydrogen injection. The shell and tube heat exchanger is oriented vertically with upward slurry flow on the tube side to minimize the localized solid sedimentation in individual tubes. Several experiments were conducted to investigate the effect of particle size, particle concentration, and total flow rate on the slurry distribution and local slurry flow in each vertical slurry heat exchanger tube; It is observed that the individual tube flow rates are highest for the central tubes and lower for …

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Hydrostratigraphic Units Within The Alluvium And Tertiary Volcanics Of East Central Yucca Flat, Nevada Test Site, Craig Thomas Shirley Jan 1995

Hydrostratigraphic Units Within The Alluvium And Tertiary Volcanics Of East Central Yucca Flat, Nevada Test Site, Craig Thomas Shirley

UNLV Retrospective Theses & Dissertations

Lithologic and geophysical log data from 46 boreholes in East Central Yucca Flat, Nevada Test Site, are used to develop lithostratigraphic and hydrostratigraphic columns. Non-zeolitized volcanic lithostratigraphic units geologically correlate to hydrostratigraphic units. Zeolitized volcanic lithostratigraphic units are combined into a single hydrostratigraphic unit. No systematic trend of porosity or permeability was found in the alluvium which comprises the uppermost hydrostratigraphic unit. Profiles of mean porosity vs lithostratigraphic elevation for 11 lithostratigraphic units are presented. Nuclear test cavities, rubble chimneys and collapse craters collectively comprise a fourth hydrostratigraphic unit.

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Old French Borrowings In "The Owl And The Nightingale", Kari J Smith-Boyer Jan 1995

Old French Borrowings In "The Owl And The Nightingale", Kari J Smith-Boyer

UNLV Retrospective Theses & Dissertations

Old French Borrowings in "The Owl and the Nightingale" ascertains the quantity and nature of Old French words present in this thirteenth-century Middle English poem. Patterns of borrowing, whether source-based or subject-based, are identified and problematic words, such as cognates, are investigated for probable language of origin. These patterns are then examined for what they may reveal about the author and audience of "The Owl and the Nightingale." Included is an appendix listing each borrowed term and cognate in alphabetical order with definitions and parts of speech.

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Factors Influencing Teacher Use Of Computer Aided Learning, Mark Leonard Spencer Jan 1995

Factors Influencing Teacher Use Of Computer Aided Learning, Mark Leonard Spencer

UNLV Retrospective Theses & Dissertations

Education teachers who attended an intensive training course in Computer Aided Learning (CAL) were surveyed to determine their subsequent use of computers in the classroom, what factors were influential in their computer use, and the reasons for taking the training course. Teachers reported an increase of computer use after the training course. Several factors were related to their computer use including available resources, administrator support, educational levels, teacher belief in computer effectiveness, teacher competence in CAL, and available budget money. Personal interest in CAL was ranked highest for why they attended the course with administrator request being ranked the lowest. …

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A Modern Synthesis Of Faith And Reason, Ralph Wm Thomas Jan 1995

A Modern Synthesis Of Faith And Reason, Ralph Wm Thomas

UNLV Retrospective Theses & Dissertations

Today, modern man is uneasy. The current outcry for ethics in government and in social life reflects a need which has not been met. What distinguishes man as a rational and creative human being are his moral, abstract, artistic, creative, and spiritual ideas. In many instances, such ideas have been declared as meaningless by the 'reasoning' of the natural sciences; This thesis will develop a modern paradigm that will synthesize subjective values coming from the 'faith' side of rational beings with the objective values obtained from their objective (abstract reasoning) side of themselves; The paradigm will be illustrated by applying …

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Differences In The Degree Of Learning Of Students Taught Using Computer Aided-Mastery Learning Versus Expository Instruction, Essington Rupert Wade Jan 1995

Differences In The Degree Of Learning Of Students Taught Using Computer Aided-Mastery Learning Versus Expository Instruction, Essington Rupert Wade

UNLV Retrospective Theses & Dissertations

The purpose of this study was to ascertain the differences between two teaching methods (traditional instruction and computer aided-mastery learning), and the degree of learning of students enrolled in basic electronics at a technical high school, for the 1993-94 and 1994-95 school years. The electronics department had used an expository method to deliver electronics instruction for the past eight years. Computer aided-mastery learning was used for the first time during the 1994-95 school year. Twenty four teacher made tests were used to assess degree of learning. Two independent t-tests were used to compare the means of each group. The groups …

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Mental Rotation And Sexual Orientation, Patricia Ann Wade Jan 1995

Mental Rotation And Sexual Orientation, Patricia Ann Wade

UNLV Retrospective Theses & Dissertations

Mental rotation, a type of visuo-spatial ability, is the ability to imagine a figure rotating in space without verbal mediation. Gender differences in the performance of mental rotation tasks are well documented but the relationship between sexual orientation and mental rotation is uncertain. This study investigates the relationship between gender, sexual orientation and scores of 584 university students on the Vandenberg Mental Rotation Test. A 2 x 2 ANOVA reveals a main effect for gender, a main effect for sexual orientation, and significant interaction between gender and sexual orientation. Mental rotation scores differentiate heterosexual male students from gay male, lesbian, …

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Benefit Segmentation Of Slot Players, Chen-Wei David Wang Jan 1995

Benefit Segmentation Of Slot Players, Chen-Wei David Wang

UNLV Retrospective Theses & Dissertations

The importance of slot machines to casinos is ever increasing. It is important for marketers to understand this growing market. The benefit segmentation of the slot players could help marketers use the resources to target the slot market efficiently and effectively; This study explored the benefits sought by the slot players from playing slot machines. The author researched twelve benefits sought by slot players. The findings provide useful implications for casino marketers and identify areas for future research.

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Standard Penetration Test Correlations For Las Vegas Soils, Christopher Robert Wener Jan 1995

Standard Penetration Test Correlations For Las Vegas Soils, Christopher Robert Wener

UNLV Retrospective Theses & Dissertations

Standard penetration tests (SPT) are used to approximate soil properties including the consistency, cohesion and the internal angle of friction. Due to the frequency of cemented sands, gravel and clay in the Las Vegas Valley, the generally accepted SPT correlations vary from actual local conditions. The following discussion will present SPT correlations, based on field test data, for consistency, cohesion and the internal angle of friction, specifically for the Las Vegas Valley. The Las Vegas soil correlations are compared to general soil correlations; Sampling methods other than the Standard Penetration Test are used to estimate soil characteristics. The SPT uses …

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The Paper Tiger And Its Predecessors: An Ethnologic History Of The American Indian Religious Freedom Act, Daniel Spencer Wall Jan 1995

The Paper Tiger And Its Predecessors: An Ethnologic History Of The American Indian Religious Freedom Act, Daniel Spencer Wall

UNLV Retrospective Theses & Dissertations

The American Indian Religious Freedom Act has proven to be a terrible disappointment for the Indians all across the country. This act presupposed an analogy between Native American ceremonial practices and Euro-American religions, but Native American ceremonies involve a broader range social institutions than Euro-American "religion." Hence, the analogy between Indian ceremonies and Euro-American religions broke down after passage of the act, and Indians failed to receive the legal remedies sought under its provisions. The following is an attempt to address the problems associated with this act by examining the historical development of a Native American rhetoric of religious freedom …

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Risky Business: Moral Arguments Againts The Nuclear Waste Policy Act Amendments Of 1987 Can Consent Be Engineered?, Mary Manning Whitaker Jan 1995

Risky Business: Moral Arguments Againts The Nuclear Waste Policy Act Amendments Of 1987 Can Consent Be Engineered?, Mary Manning Whitaker

UNLV Retrospective Theses & Dissertations

Risky Business: Moral Arguments Against the Nuclear Waste Policy Act Amendments of 1987, Can Consent Be Engineered? asks the moral and ethical questions of assigning risk. In a democracy a fundamental principle for imposing risk is obtaining the consent of the governed. In the case of a proposed high-level nuclear waste repository at Yucca Mountain, Nevada, Congress has ignored this basic principle. An unwilling population in a politically weak state has been forced to bear the burden from highly radioactive spent fuel from nuclear power reactors operating in the majority of states. The State of Nevada does not reap the …

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Creating A Panethnic Identity: The Asian American Movement's Vision Of Racial And Political Solidarity, Rosette Ho Wirtz Jan 1995

Creating A Panethnic Identity: The Asian American Movement's Vision Of Racial And Political Solidarity, Rosette Ho Wirtz

UNLV Retrospective Theses & Dissertations

The Asian American movement occurred in the late 1960s when America was being criticized as a land of inequality where racial discrimination degraded all people of color. Asian American activists participated in the effort to achieve social, political, and economical equality with the larger White dominated society. Answers will be sought for three questions one should ask when confronted with the problem of analyzing a minority movement. The questions are: (1) What are the goals of the movement?; (2) What forces initiate and propel the movement into existence?; and (3) How does the movement attain its goals? Lastly, this thesis …

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Lower Cambrian Bioherms In Central Nevada And Eastern California, Xiaoping Zhou Jan 1995

Lower Cambrian Bioherms In Central Nevada And Eastern California, Xiaoping Zhou

UNLV Retrospective Theses & Dissertations

A comparative sedimentological and paleontological study was made of two approximately coeval Lower Cambrian bioherm complexes, one in the Ravenswood area of Lander County in central Nevada, and the other in the Montenegro Member of the Campito Formation in the White-Inyo Range of eastern California. Although both bioherm complexes were constructed by archaeocyaths and calcareous microbial organisms, there are significant differences in the structure and fabric of the biohermal limestones, in the taxa and diversity of archaeocyaths, and in the diversity of the bioherm community in general. The Ravenswood bioherms developed as framework reefs in a high-energy, normal marine setting …

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A Garden In The Desert? A Regional Study Of Ranching And Farming In Southern Nevada, 1870-1930, Sherryl Lynn Weber Jan 1995

A Garden In The Desert? A Regional Study Of Ranching And Farming In Southern Nevada, 1870-1930, Sherryl Lynn Weber

UNLV Retrospective Theses & Dissertations

In the years between 1870 and 1930 Southern Nevada ranchers were actively engaged in reclaiming the land for agriculture. The availability of cheap land, artesian water, railroad transportation, nearby markets, along with enthusiastic support from town boosters facilitated their determined efforts to develop agriculture as a viable economic activity. Ranching and farming played an important role in Southern Nevada's early development and contributed in a significant way to its economic growth. Moreover, it reflects a noteworthy and integral part of the area's history.

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An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky Jan 1995

An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky

UNLV Retrospective Theses & Dissertations

The purpose of this study is to assess the potential to use water chemistry parameters to determine ground water flow pathways at the south rim of Grand Canyon National Park, Arizona. South rim spring, ground, and surface waters and one north rim spring were sampled from September 1992 through September 1993. Field measurements (pH, electrical conductivity, alkalinity, temperature, total dissolved solids, and dissolved oxygen), major anion (fluoride, chloride, bromide, nitrate, phosphate, and sulfate) concentrations, selected trace element concentrations, and the ratios of the stable isotopes of oxygen and hydrogen. Major anion, trace element, and field measurement data were analyzed using …

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Self-Stabilizing Sorting Algorithms, Joseph Chacko Jan 1995

Self-Stabilizing Sorting Algorithms, Joseph Chacko

UNLV Retrospective Theses & Dissertations

A distributed system consists of a set of machines which do not share a global memory. Depending on the connectivity of the network, each machine gets a partial view of the global state. Transient failures in one area of the network may go unnoticed in other areas and may cause the system to go to an illegal global state. However, if the system were self-stabilizing, it would be guaranteed that regardless of the current state, the system would recover to a legal configuration in a finite number of moves; The traditional way of creating reliable systems is to make redundant …

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Wooing The Hispanic: A Study Of Marketing Communication Strategies Targeting The United States Hispanic Market, Olga I Delgado Jan 1995

Wooing The Hispanic: A Study Of Marketing Communication Strategies Targeting The United States Hispanic Market, Olga I Delgado

UNLV Retrospective Theses & Dissertations

Case studies of three national corporations examine their successful U.S. Hispanic marketing communication strategies. They are Ford Motor Company, Anheuser-Busch Companies, Incorporated, and Metropolitan Life Insurance Company. Similarities of strategies are an emphasis on community relations, reliance on Spanish-language messages, and a geographic concentration in the largest Hispanic markets. Differences are media mix and advertising style. Ford and Anheuser-Busch strive to meet regional needs and focus on electronic media. Metropolitan Life uses a general approach and emphasizes print media. Important trends for U.S. Hispanic marketing are the growing homogenization of Hispanic groups which permitted the introduction of pan-Hispanic strategies and …

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Military Downsizing In The United States: A Study Of Military Base Closures In California From The Late 1980'S To Early 1990'S, Hobreigh R Fischer Jan 1995

Military Downsizing In The United States: A Study Of Military Base Closures In California From The Late 1980'S To Early 1990'S, Hobreigh R Fischer

UNLV Retrospective Theses & Dissertations

Military Downsizing in the United States examines military downsizing efforts during the late 1980's and early 1990's. It begins with an outline of the historical development of the United States military, and it then evaluates the key economic and political factors involved in the recent decision to close bases around the country. Military Downsizing in the United States then evaluates three separate base closure case studies in California. The case studies are Fort Ord, the Long Beach Naval Complex, and Norton Air Force Base. The goal of these evaluations is to determine whether interest group or elite politics is controlling …

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Quality Judgment: Toward The "Essentially Human" In Ethics And Policy, Kenneth Wayne Johnson Jan 1995

Quality Judgment: Toward The "Essentially Human" In Ethics And Policy, Kenneth Wayne Johnson

UNLV Retrospective Theses & Dissertations

This thesis describes a framework, a component of a larger paradigm, designed to improve the thinking, planning, and acting of individuals within society. It is based upon factors of human existence that most can agree are fundamental to pursuing matters of importance, however disparately we may see them. Assuming that human choice is a function of consciousness and compassion--it argues that insight from ethics and policy studies can be improved if founded upon an understanding of the implications of the full development and use of the essential human capacities that underlie consciousness and compassion: critical and creative thinking; communicating in …

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Evaluation Of Work Motivation Factors Among Management And Employees In Food And Beverage Departments In International Tourist Hotels In Taiwan, Pearl Lin Jan 1995

Evaluation Of Work Motivation Factors Among Management And Employees In Food And Beverage Departments In International Tourist Hotels In Taiwan, Pearl Lin

UNLV Retrospective Theses & Dissertations

Perceptional inconsistencies have the potential for creating barriers to motivational development because management may not be responsive to employee needs. An absence of a convergence in perceptions may increase employee turnover, thus creating a liability to the company. In order to increase the employee retention rate, greater insight was needed for understanding work motivational factors. The purpose of this research has been to evaluate the perceptions of management and employees on work motivation factors relative to their importance. Methodology and data analysis are included. Lastly, conclusions of the research findings and suggestions for further studies are discussed.

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Ground Water - Surface Water Interactions In The Lower Virgin River Area, Arizona And Nevada, Lynn Metcalf Jan 1995

Ground Water - Surface Water Interactions In The Lower Virgin River Area, Arizona And Nevada, Lynn Metcalf

UNLV Retrospective Theses & Dissertations

This study assessed interactions between ground water and surface water in the lower Virgin River, Arizona and Nevada, using stable isotopes and major ions as environmental tracers. The study reach starts at the Virgin River Gorge in Arizona and terminates at Lake Mead in Nevada, 80 km downstream. Discharge data showed that major sources of water for the lower Virgin River were discharge from the upper Virgin River and the Littlefield Springs, with minor amounts from Beaver Dam Wash, a perennial tributary. No strong evidence was found for ground-water seepage into the channel. In general, dissolved solids concentrations increased downstream …

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Breakdown In The Broker State: The Cio In Southern Nevada During World War Ii, Richard W Mingus Jan 1995

Breakdown In The Broker State: The Cio In Southern Nevada During World War Ii, Richard W Mingus

UNLV Retrospective Theses & Dissertations

During World War II, the Congress of Industrial Organizations (CIO) and the American Federation of Labor (AFL) fought a bitter jurisdictional dispute at Basic Magnesium, Incorporated (BMI), a defense plant in southern Nevada. While the CIO concentrated on organizing African-American workers, the AFL colluded with plant managers and conservative politicians, including Senator Patrick A. McCarran, in an effort to destroy the industrial union. Following the CIO's victory in a representation election sponsored by the National Labor Relations Board (NLRB), the AFL and its allies used the newly-enacted Frey Amendment, a piece of legislation which sharply limited the Board's authority to …

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Where Are The Girls? Gender Differences In Secondary Science And Math Grades, Jeff Matthew Ommen Jan 1995

Where Are The Girls? Gender Differences In Secondary Science And Math Grades, Jeff Matthew Ommen

UNLV Retrospective Theses & Dissertations

To investigate gender differences in secondary science and math grades, I used a cumulative numerical grade, a method to reduce a single student's many grades into a single number. Subjects were 640 students, who graduated from two small, mid-west high schools from the years of 1986-1993. Gender differences in cumulative numerical grades were not continuously supported in single class tests, in single school tests, or combined school tests. There were instances gender differences in cumulative numerical grade were upheld, however. A definite interaction was evident between math and science cumulative numerical grades. The differences between male and female cumulative numerical …

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The Mobility Of Radiocesium And Plutonium In Roach Lake In Southern Nevada, Mohammadtagi Nassehzadeh-Tabriz Jan 1995

The Mobility Of Radiocesium And Plutonium In Roach Lake In Southern Nevada, Mohammadtagi Nassehzadeh-Tabriz

UNLV Retrospective Theses & Dissertations

The concentrations of several natural and artificial radionuclides were determined in the sediment from a dry lake in southern Nevada. Five sites (designated I through V) were selected in a dry lake called Roach Lake located in Ivanpah Valley about 41 miles west of Las Vegas, Nevada. The samples were analyzed for Cs-137 and other gamma emitting radionuclides using high purity germanium detectors. the plutonium analysis was performed, after chemical separation, by the detection of its alpha particle emissions with surface barrier detectors. Strontium-90 was determined at only one site, after extraction from the samples, by measuring its daughter yttrium-90 …

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Measurements Of The Second Hyperpolarizabilty Of Argon, Methane, Carbon Tetrafluoride, And Sulfur Hexafluoride, John J Palubinskas Jan 1995

Measurements Of The Second Hyperpolarizabilty Of Argon, Methane, Carbon Tetrafluoride, And Sulfur Hexafluoride, John J Palubinskas

UNLV Retrospective Theses & Dissertations

The second hyperpolarizabilities {dollar}\gamma{dollar} have been measured at {dollar}\lambda{dollar} = 632.8 nm for argon (Ar), methane (CH{dollar}\sb4{dollar}), carbon tetrafluoride (CF{dollar}\sb6{dollar}), and sulfur hexafluoride (SF{dollar}\sb6{dollar}) by means of the dc Kerr effect in the gas phase. Measurements were made over a range of densities and extrapolated to the zero density limit. The results obtained have an uncertainty of 1.7%, 1.1%, 0.8%, and 0.5% for SF{dollar}\sb6{dollar}, CF{dollar}\sb4{dollar}, Ar, and CH{dollar}\sb4{dollar}, respectively. A comparison with other dc Kerr results shows our results to be the most accurate to date, thereby providing a better standard for judging quantum chemistry calculations of {dollar}\gamma{dollar}. The difference …

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The Framers, The Bill Of Rights, And The Ninth Amendment, Kara Sue Rickey Jan 1995

The Framers, The Bill Of Rights, And The Ninth Amendment, Kara Sue Rickey

UNLV Retrospective Theses & Dissertations

The Bill of Rights, The Framers, and the Ninth Amendment is an examination of current arguments for and against expanded recognition of the Ninth Amendment and unenumerated rights by the judiciary. A brief history of the Ninth Amendment is included. Also explored are the debates between the Federalists and Anti-Federalists on the need for a bill of rights, and how the Ninth Amendment could resolve this conflict.

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