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Colorimetric Determination And Speciation Of Arsenic With Silver Diethyldithiocarbamate, Daniel Carl Fischer

UNLV Retrospective Theses & Dissertations

The Silver Diethyldithiocarbamate (SDDC) Method is a widely used colorimetric technique for the determination of aqueous arsenic. The chemistry of the process is discussed in detail, and the method is compared to the other Environmental Protection Agency approved arsenic methods. Original modifications to the apparatus, allowing a more efficient reaction initiation are described. The observed detection limit of the improved procedure is 5 {dollar}\mu{dollar}g As/L (0.5 {dollar}\mu{dollar}g As). Due to the varied toxicity of arsenic compounds and oxidation states in the environment, speciation techniques are important. A review of the literature regarding the determination of individual arsenic species is presented. …

Evaluation Of Purging Methods When Sampling For Volatile Organic Compounds From Low-Yield Monitoring Wells, William Lowry Halligan

UNLV Retrospective Theses & Dissertations

The purpose of this laboratory study was to determine the effects various purging procedures have on chlorobenzene and 1,1,1-Trichloroethane concentrations in a simulated monitoring well and how effective purging procedures were in providing representative samples. The experimental apparatus consisted of a teflon monitoring well complete with filter pack and bentonite seal constructed in a 10.2 cm diameter stainless steel screen and casing which acted as a "borehole" for the monitoring well. Low-permeability soil in a 25.4 cm diameter stainless screen surrounded the borehole and simulated an aquitard or low-permeability aquifer. This apparatus was placed in a tank filled with chlorobenzene …

The Effects Of Educational Intervention On The Myths Surrounding Alzheimer's Disease, Penelope Hallman

UNLV Retrospective Theses & Dissertations

Alzheimer's disease affects millions of Americans and remains the most common form of dementia in the elderly. Due to its evasive origin, myths about the disease have arisen within the general population, creating the need for increased public exposure to the accurate information currently known about Alzheimer's. Toward this end, 58 undergraduates participated in an investigation aimed at examining the amount of accurate information obtained through the use of an educational video about Alzheimer's disease. Results indicate that previous interest in the topic of aging was not a significant factor in the amount of information subjects' possessed about Alzheimer's disease. …

Analysis Of Deformation Bands In The Aztec Sandstone, Valley Of Fire State Park, Nevada, Robin Eugene Hill

UNLV Retrospective Theses & Dissertations

Deformation bands were analyzed by mapping and describing over 500 of the structures exposed on a bedding surface of about 560 square meters present in the Aztec Sandstone in the Valley of Fire State Park, Nevada; Three sets of deformation bands are present. Two sets are interpreted as coeval and form a conjugate set with a dihedral angle of 90 degRees These are often composed of multiple bands. In contrast, the third set is nearly always a single band which is sinuous or jagged along its length. They often curve sharply near the intersections with the earlier formed sets, becoming …

The Distribution Of Vertical Groundwater Flow In The Saturated Zone Of The Yucca Mountain Area: A Cross-Sectional Finite Element Model, Sandra Jean Haws

UNLV Retrospective Theses & Dissertations

This study uses cross-sectional modeling to explore the saturated groundwater flow at Yucca Mountain in a multi-layer system. Cross-sectional modeling allows the simulation of vertical leakage not included in areal models. The cross section was constructed along an estimated streamline and is 84.3 kilometers long. The conceptual model includes an upper volcanic and lower carbonate aquifer separated by an aquitard with an alluvial aquifer down-gradient. Results indicate that some groundwater flows beneath the high-gradient (low conductivity) zone through the carbonate aquifer. The volcanic aquifer, south of the high gradient zone, must be supplied with additional groundwater as the low conductivity …

Effects Of Estrogen And Progesterone On Tolerance To Thermal Stress, Kris Alan Lyon

UNLV Retrospective Theses & Dissertations

Analysis of variance showed that female Harlan Sprague-Dawley rats treated with E in combination with P (EP) had a significantly higher rectal temperature (Tre) than untreated control animals and those treated with E or P alone. In E treated rats, Tre was significantly higher than control animals and those treated with P; All treatment groups had a significantly lower tail skin temperature as compared to the control animals. The rise in Tre in E and EP treated rats did not appear to result from an increase in metabolism since the rates of oxygen consumption did not differ significantly with hormone …

First Cousins: A Novel On Youth, Family, Love, Faith, And Responsibility (Original Novel), David Myles Jones

UNLV Retrospective Theses & Dissertations

First Cousins is a contemporary novel detailing four months in the life of William Reginald "Jack" Jackson, an 18-year old African-American graduate of Valley High School in West Des Moines, Iowa. Themes of initiation provide the primary focus: as a young adult, William must learn how to carry out new responsibilities toward family, friends, and the future. The novel's central conflict emerges from William's blossoming relationship with his adopted cousin Natalie, a rebellious 18-year old who must also come to terms with the new demands of young adulthood. Set primarily in North Carolina and Iowa, the novel is narrated from …

An Analysis Of The Progress Of Social Welfare Administration In The United States And An Examination Of Some Major Alternatives, Amy Marie Marshall

UNLV Retrospective Theses & Dissertations

This thesis considers the social welfare administration legislation that was passed during the presidential administration of Lyndon Johnson, and whether this legislation has successfully accomplished the eradication of poverty in the United States. It is concluded that poverty remains a persistent problem in the United States. Reasons for the persistence of poverty are considered and major private and public alternatives to present poverty relief programs are examined.

Visualization Of A Plane Sweep Algorithm For Construction Of The Visibility Graph For Robot Path Planning, Vikas B Patel

UNLV Retrospective Theses & Dissertations

Research and development work in robotics and industrial automation has prompted a need for efficient motion planning algorithms for collision avoidance. To build fully autonomous robots, these algorithms must also model the environment correctly and accurately to safely maneuver the robot around obstacles. The main focus of this thesis is on the following problem and its solution: Given a set of obstacles represented as polygons in two-dimensional space, determine the shortest, collision-free path from the source point of the robot to some destination point. A fast and efficient algorithm for solving this problem is based on a plane-sweeping technique and …

The Crisis In American Education: The Impact On Vocational Education, Barbara Ann Quade

UNLV Retrospective Theses & Dissertations

This thesis is an interpretation and evaluation of the problems in the American education system which is failing American citizens by annually producing thousands of illiterates. Moreover, schools are failing to provide an adequate number of skilled workers for government, the military, and business and industry, and that trend will continue unless a drastic restructuring of the entire school system takes place; The paper examines reports on the crisis in education, reviews problems of illiteracy and the impact on technical skills, details concerns of the military, business and industry, and interested individuals regarding the quality of education in the U.S. …

Analysis Of Hotel Guest Room Supply, Donald Walter Raymond

UNLV Retrospective Theses & Dissertations

"Analysis of Hotel Guest Room Supply" is an exploratory paper that develops both a methodology and a model for estimating the expected number of hotel rooms at a destination location (MSA). The expected number of hotel employees at a destination are estimated from US government data (1980 Census of the Population and County Business Patterns). The hotel employee estimates are used to determine the expected number of hotel guest rooms for a destination location. These estimates were also applied to a third model, inventory shortage, to determine if hotel guest room supply and demand were in a state of equilibrium. …

Counterterrorism In The 1990s: A Framework For Dynamic Analysis, Marilyn Rose Rogers

UNLV Retrospective Theses & Dissertations

The costs of terrorism are high. Beyond the immediate targets of violence, there exists an audience of public perception whose fragile temperament is too often swayed by the seeming randomness of the act. When terrorism gains momentum, legitimate governments lose public confidence in state protection. To minimize such effects, governments must consider a variety of options to counter the impact of terrorism; Chapter One focuses on the necessity of counter-terrorism plans which encompass the totality of the circumstances; Chapter Two examines the historical evolution of terrorism from a tactical open warfare activity to its modern form as a complex political …

Temporal And Spatial Variation In Pelagic Fish Abundance In Lake Mead Determined From Echograms, Gene R. Wilde, Larry J. Paulson

Publications (WR)

Echograms have been used extensively to locate and estimate the relative abundance of marine fish stocks (Cushing 1973). In freshwater, echograms have been used to describe vertical (Netsch et al. 1971; Eggers 1978; O'Brien et al. 1984; Matthews et al. 1985), spatial (O'Brien et al. 1984; Wanjala et al. 1986) and temporal (Baker and Paulson 1983) patterns in fish abundance. Although most uses of echograms have been qualitative, Mullan and Applegate (1969) and Matthews et al. (1985) obtained relative estimates of fish abundance by counting targets (fish) on echograms. However, neither Mullan and Applegate (1969) nor Matthews et al. (1985) …

Unlv Miller Lite Rebel Round-Up, University Of Nevada, Las Vegas

UNLV Basketball Programs

Team roster for both schools.

UNLV Schedule

List of UNLV Scholarship Donors

Meet the Rebels

Opponent's Scouting Report

Jerry Tarkanian Story

Story about Jerry Tarkanian's birthday party

Also contains information on other sports at UNLV

Cigarette Advertising To Women: Taking Responsibility, Mary Guinan

School of Public Health Faculty Research

A variety of magazines are directed at American women. Some emphasize fashion, while others cover child rearing, homemaking, or gardening; still others stress career, coping with multiple women's roles, or feminism. Almost without exception, women's health concerns are periodically addressed by these magazines. Because women are the target audience, I have always assumed that these publications have women's best interests at heart. Is this a realistic assumption? I'm not sure. I also do not know what influence women's magazines have on women's health behavior, but I think it is substantial. If this is so, then shouldn't we hold these publications …

Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation

Publications (WR)

A pumped storage system consists of an upper reservoir and lower reservoir separated by an elevation difference. During low demand energy periods such as nights and weekends water is pumped from the lower to the upper reservoir using available energy from conventional steam electric power plants. During high energy demand periods, such as mornings and afternoons of weekdays, upper reservoir water is allowed to drop back down through the same system of water conduits and turbines, generating electricity to conveniently meet abrupt electrical energy requirements. The same water turbines thus act both as pumps and as conventional hydroelectric turbines. Because …

On Purely Exponential Logic Queries, Kazem Taghva, Tian-Zheng Wu

Electrical & Computer Engineering Faculty Research

The recursive nature of logic programs has long been the subject of optimization techniques [2, 8]. Recently, the database community has taken interest in extending the expressive power of relational algebra by augmenting it with function-free Horn style logic queries. This extension has led to various optimization techniques [2, 6, 8]. It seems, almost invariably, these techniques are most efficient in the processing of linear recursive queries. Moreover, as the equivalence of nonlinear rules to linear rules in general is undecidable [3, 9], the best one can hope is to rewrite some nonlinear rules as linear rules. For this reason, …

Virginity And Celibacy As Health Issues, Mary Guinan

School of Public Health Faculty Research

Sexual behavior is both a health issue and a moral issue. Hence public education on sexuality has traditionally come from two main sources, those individuals or groups concerned with health and those concerned with morals. In his book No Magic Bullet (Oxford University Press, 1985), Allan Brandt describes the tensions that developed between these groups over the control of sexually transmitted diseases in the United States early in this century. Both groups wanted to control sexual behavior, but for different reasons. Public health personnel wanted to change sexual behavior in order to control infection and disease, while moralists believed that …

Environmental Assessment Of Las Vegas Wash And Lake Mead Artificial Wetlands Demonstration Project, John R. Baker, R. M. Gersberg, U.S. Environmental Protection Agency

Publications (WR)

The effective use of artificial wetlands for treatment of municipal wastewater is well documented; however, design and economic data for artificial wetlands development are limited (Gersberg et al., 1984a). This is due partly to regional differences in climate, soils, and vegetation and partly to the desired waste treatment. As a result, specific treatment levels and cost benefits relative to the use of an artificial wetlands for a particular site cannot be evaluated adequately without a pilot demonstration project. Las Vegas Wash receives sewage effluent from the Las Vegas metropolitan area and has been designated as a wetlands community park. Las …

Have You Had Your Mammogram, Doctor?, Mary Guinan

School of Public Health Faculty Research

Breast cancer incidence continues to increase in the United States, with more than 130,000 new cases and 42,000 deaths expected this year. Today, one in every ten women in the United States will develop breast cancer at sometime during their lives. Breast cancer can be prevented by early prophylactic bilateral mastectomy, ie, removal of the breasts before any signs or symptoms develop. This practice was advocated by a male gynecologist colleague of mine. When I expressed horror at his suggestion that I have such a procedure at age 32, he challenged me to defend myself against advocating a practice that …

Pms Or Perifollicular Phase Euphoria?, Mary Guinan

School of Public Health Faculty Research

Why is it that so little is known about PMS? First of all, there is no agreement on what PMS is. If investigators are referring to different sets of symptoms, how can studies be comparable? In fact, they are not. Not only are the symptoms different, but the timing of symptoms is different, Some studies describe symptoms that occur 7 to 10 days before the onset of menses, while others include symptoms that begin 14 days before the onset of menses and continue for 7 days after onset. This definition suggests that women may have PMS-related symptoms during 21 days …

Unlv Lady Rebels 1988-1989, University Of Nevada, Las Vegas

UNLV Basketball Programs

1988-1989 Lady Rebel Outlook

Behind the Scenes

Lady Rebel Philosophy

Meet the Lady Rebels

This is UNLV

Rosters

1987-1988 Opponents

The Bert Leavitt Memorial Scholarship

The Record Book

Thomas and Mack Center

Opponent Publicists

1988-1989 Schedule

G. H. Mead, Socialism, And The Progressive Agenda, Dmitri N. Shalin

Sociology Faculty Research

Mead is known today primarily for his original philosophy and social psychology. Much less familiar to us is Mead the reformer, a man who sought to balance political engagement with academic detachment and who established himself as an astute critic of contemporary American society. This paper examines Mead's political beliefs and his theory of the reform process. Drawing on little known sources and archival materials, it demonstrates that Mead shared socialism's humanitarian ends and that, following the dominant progressive ideology of his time, he sought to accomplish these ends by constitutional means. An argument is made that Mead's ideological commitments …

The Relationship Between The Actual And Ideal Leadership Styles Of High School Assistant Principals Over Selected District Instructional Objectives, T. Brock Morris

UNLV Retrospective Theses & Dissertations

The problem this study focused on was, what was the relationship between the actual and ideal leadership styles of high school assistant principals over selected district instructional objectives. In completing the research for this study, the situational leadership style and readiness theories of Paul Hersey and Kenneth H. Blanchard were used; Their theories regarding the relationship between a leader's actual and ideal leadership styles were applied to the assistant principals and teachers of nine high schools of the Clark County School District in Southern Nevada. A random sampling of these teachers were given the Readiness Style Match survey developed by …

Recommendations For A Preparatory English Language Program For Hearing-Impaired College Students, Marguerite Re

UNLV Retrospective Theses & Dissertations

The purpose of this research was to develop recommendations for a preparatory English language program for hearing-impaired college students for Clark County Community College, Las Vegas, Nevada, and other concerned colleges that do not presently offer such a program. A questionnaire designed to elicit program information regarding the goals and objectives, instructional practices and procedures, assessment and evaluation, and major problems and solutions was developed. The questionnaire was sent to directors of current preparatory hearing-impaired English language programs in two-year, liberal arts colleges; An analysis of the data received revealed a good deal of diversity as well as considerable similarity …

A Survey Of Community College Institutional Initiatives Designed To Improve Performance On The Florida College-Level Academic Skills Test, Glenn Edward Rogers

UNLV Retrospective Theses & Dissertations

By legislative mandate, Florida publicly-supported college and university students must demonstrate, via acceptable performance on the College-Level Academic Skills Test, that they are eligible for award of associate-in-arts degrees and matriculation in university upper divisions. The CLAST, designed to assess possession of basic academic skills, consists of four subtests: computation, writing, reading and essay. The essays are graded by teams of judges; the other subtests are objective and machine scored; This study was designed to identify and describe salient features of public community college management, teaching and student support innovations which were instituted in response to the CLAST mandate. Senior …

A Profile Of The Secondary Principalship In The Clark County School District With Recommendations For Intra-District And District-University Articulation, Roberta L Holton

UNLV Retrospective Theses & Dissertations

The study described the principalship involving perceptions of instruction, educational programs, and assistant principals' responsibilities, in the secondary schools of the Clark County School District; Compared for similarities and differences between junior and senior high C.C.S.D. principals, and a 1988 national survey of 716 high school administrators, the resultant data was used to suggest training and educational planning within the Clark County School District and the University of Nevada, Las Vegas; The research utilized descriptive statistics to profile and compare Clark County School District secondary school principals to the 1988 National Association of Secondary School Principals survey, National Profile of …

In Hope Of Heaven: English Recusant Prison Writings Of The Sixteenth Century, Paul E Strauss

UNLV Retrospective Theses & Dissertations

This dissertation focuses on the prison writings of four Catholic writers in sixteenth century England, all of whom were imprisoned for their failure to take the Oath of Supremacy acknowledging the English monarch as Head of the Church. They were all executed or exiled for their resistance to the Oath. They also wrote books while they were in prison to encourage themselves and others to persist in the faith, with the exception of Robert Southwell, who wrote his book shortly before his imprisonment; John Fisher was imprisoned in 1534 and executed in 1535. While in prison he wrote two letters …

Morphology And Development Of The Red Rock Canyon Alluvial Fan, Clark County, Nevada, Cheryl Mcdonnell-Canan

UNLV Retrospective Theses & Dissertations

Changes in morphology and pedogenic carbonate accumulation establish relative ages of a chronosequence of calcic soils and pedogenic calcretes that underlie four surfaces identified on the Red Rock Canyon alluvial fan. All surfaces identified are formed of limestone alluvium, occur at elevations of 853 m, and share the same climate and vegetation. These surfaces were mapped and delimited by color, texture, dissection, and soil development and were ranked in relative age by elevation and topographic position; Because of difficulty in measuring pedogenic carbonate in soils derived from calcareous alluvium, a technique employing macroscopic and microscopic visual determinations, combined with Chittick …

Hydrology Of Bishop Creek, Inyo County, California: An Isotopic Analysis, Michael Louis Space

UNLV Retrospective Theses & Dissertations

Bishop Creek, located in east-central California on the eastern side of the Sierra Nevada supports fauna and flora that otherwise could not exist. There are approximately 3000 meters of relief in the Bishop Creek watershed. The headwaters of the creek originate from three man-made lakes, situated at 2790 to 2975 meters above sea level. During its course, diverted water from Bishop Creek flows through a series of five hydroelectric power plants, resulting in streamflow that is less than that expected under natural conditions much of the year. Stream diversion for hydroelectric power production may have adverse effects on the riparian …