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The Relationship Between Test Anxiety And Academic Performance Of Untreated Test Anxious College Students, Joanmarie Christine Vlach-Kolesar

UNLV Retrospective Theses & Dissertations

The relationship between test anxiety and academic performance was determined for a sample of fifty-three college students. Classroom examination scores and measures of preterm and postterm self-reported anxiety were collected to test the basic assumptions: (a) that there is a relationship between test anxiety and academic performance; (b) that test anxiety has a debilitating effect on academic performance; (c) to investigate if academic performance changes for test anxious subjects without treatment; and (d) if untreated test anxiety will decline over the course of a semester. The results were consistent with general findings that there is a significant negative correlation between …

Effects Of Ambient Lake Mohave Temperatures On Development, Oxygen Consumption, And Hatching Success Of The Razorback Sucker, Michael A. Bozek, Larry J. Paulson, Gene R. Wilde

Publications (WR)

Spawning of razorback suckers, Xyrauchen texanus, in Lake Mohave occurred from 10-22° C and larvae were collected at water temperatures from 10-15° C in 1982 and 1983. In the laboratory, hatching success was similar from 12-20° C, but reduced hatching success was found at 10° C while none hatched at 8°C. Development rate and oxygen consumption were positively related to incubation temperature. Direct effects of ambient Lake Mohave water temperatures on hatching success of razorback sucker embryos are considered minimal. Historical spawning temperatures for the species are hypothesized based upon successful incubation temperatures and comparison to the white sucker, …

Introduction And Enhancement Of Vegetative Cover At Lake Mead, Jennifer S. Haley, Lisa K. Croft, Suzanne E. Leavitt, Larry J. Paulson

Publications (WR)

Studies done by the Nevada Department of Wildlife (NDOW) and the Arizona Fish and Game between 1978 and 1981 indicate that inadequate cover may be limiting the production and survival of largemouth bass at the Lake Mead National Recreation Area (LMNRA). As a result of these studies, NDOW initiated a contract in 1986 with the Lake Mead Research Center (LMRC) to investigate means of improving habitat for game fish by introducing natural and/or artificial cover. During Phase I (1986-1987) of this contract, the shoreline of Lake Mead was surveyed for aquatic and terrestrial plant growth. Also during this time, submerged …

On Implicational Dependency Families Possessing Finite Armstrong Relations, Kazem Taghva

Electrical & Computer Engineering Faculty Research

Let X ≠ 0 be a finite collection of nonempty relations over the relation scheme R(A1, A2 , ... , A,.); then the closure of X under embedding and direct product (up to isomorphism) is a finitely generated Implicational Dependency family (ID-family) generated by X. In this paper, we show that the class of finitely generated ID-families is identical to the class of those ID-families which possess a finite Armstrong relation.

Late-Holocene Earthflows Of The Willard Playa/Dune Complex, Estancia Valley, New Mexico: A Geomorphic Response To Climatic Change, Kurt A. Goebel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Late-middle to late Holocene dune sediment that overlies Pleistocene lacustrine sediment marks the onset of xeric conditions in the Estancia Valley, central New Mexico. Incised into the underlying lacustrine sediments, the modern deflation basins are enclosed by parabolic dunes composed of clay and gypsum derived from the underlying sediment.

Located on the in-facing dune slopes of the deflation basins, the most striking geomorphic feature of this dune complex are numerous elongated scars. These relict scars document a geomorphically distinct earthflow event. Arroyos that cut into flow scars expose eolian earthflow sediment overlying lacustrine deposits. In the zone of depletion, erosional-flow …

Women And Crack Addiction, Mary Guinan

School of Public Health Faculty Research

A smokable form of cocaine has recently been introduced to the United States. First documented in New York in 1985, the use of rock cocaine or crack has spread rapidly throughout the country since then. Until crack appeared, noninjectable cocaine use was largely a problem in the middle and upper classes because of its high price. Crack has changed that; five and ten dollar packages are readily available. Crack produces a short-lived high and may enhance sexual desire and performance. The rapidity of the spread of crack in inner cities is extraordinary but the movement into rural areas has been …

Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle

Publications (WR)

Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of a larger, game fishery enhancement study (Lake Mead Fertilization Project), designed to assess feasability of increasing survivorship of larval/juvenile shad by boosting phosphate levels, thereby increasing algal and zooplankton biomass, during the shad spawning period. Shad are the primary forage base for the striped bass (Morone saxatilis) and black bass (Macropterus salmoides) fisheries. Weekly samples were …

Three Cheers For Elective Hysterectomy, Mary Guinan

School of Public Health Faculty Research

Hysterectomy is the second (after cesarean section) most commonly performed major surgical procedure in the United States today.1 About [650,000 American women will have hysterectomies in 1989. Thirty-seven percent of all US women will have had a hysterectomy by the time they reach age 60. The number of hysterectomies increased dramatically Born 1965 to 1975, but then leveled off and decreased to the present level of about 7 per 1000 women. The ~ghest rates occur in women aged 35 to 44 years, the age group the so called baby boomers are now entering in large numbers. Therefore, if the age-specific …

The Geology And Structural Significance Of The Arch Mountain Area, Northern Black Mountains, Mohave County, Arizona, Edward Eschner

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Arch Mountain area of northwestern Mohave County, Arizona, is typified by rocks that range from Precambrian to Quatemary in age. Arch mountain is a north-trending horst bounded on the west by the Petroglyph Wash graben and on the east by the Virgin Basin. A low-angle normal fault, herein named the Arch Mountain detachment fault, is exposed for 6 km along strike just below the ridge crest of Arch Mountain, and it is typified by a 2-20 cm thick zone of hematite-impregnated breccia and cataclasite. The detachment fault places an upper plate of Precambrian gneiss, Paleozoic quartzite, shale and dolomite, …

Total Maximum Daily Loads And Waste Load Allocations For Las Vegas Bay: Rationale And Calulations, State Of Nevada: Division Of Environmental Protection

Publications (WR)

In September 1987 the Nevada Division of Environmental Protection revised Water Quality Standards for Las Vegas Wash (LVW) and Lake Mead. Standards were set for chlorophyll-a and unionized ammonia in Las Vegas Bay (LVB) (NDEP 1987). The 1986 and 1987 LVB data showed non-achievement of both the chlorophyll-a and unionized ammonia standard which triggered an analysis of total phosphorus and total ammonia Total Maximum Daily Loads and Waste Load Allocations which are presented in this report. This report is separated into three sections: 1. 1987 Las Vegas Bay Water Quality Conditions and Seasonal Periodicity. 2. Concentration Estimates at Northshore Road …

Limnological Monitoring Data For Lake Mead During 1988, Suzanne E. Leavitt, Larry J. Paulson, State Of Nevada: Division Of Environmental Protection

Publications (WR)

Limnological monitoring was conducted in Las Vegas Bay and Boulder Basin from April to December of 1988. The purpose of the monitoring was to (i) document possible changes in water quality resulting from decreased phosphorus loading and increased ammonia in Las Vegas Wash, and (ii) establish a data base for evaluating the adequacy of water quality standards.

Red Swamp Crayfish Ecology In Lake Mead, Suzanne E. Leavitt, Jennifer Stephens Haley, Mikell Hager, Donald H. Baepler, Nevada Department Of Wildlife

Publications (WR)

Red swamp crayfish (Procambarus clarkii) were trapped in Flamingo Wash, an urban wash of Las Vegas, during four periods of 1988. Life history and reproductive success were determined. The trapped crayfish were marked and released into a study cove in Lake Mead as part of an experimental stocking program. Retrap data from the study cove were used to determine life history, habitat preferences, and movement patterns of the stocked crayfish. In addition, a literature search was done on red swamp crayfish ecology, including food preferences, life history, habitat preferences and fish predation.

Unlv Vs. Temple And Unlv Vs. California State, Long Beach, University Of Nevada, Las Vegas

UNLV Basketball Programs

Team roster for all schools

UNLV Schedule

List of UNLV Scholarship Donors

Meet the Rebels

Opponents' Scouting Report

Jerry Tarkanian Story

Also contains information on other sports at UNLV

Water Relations Of Obligate Riparian Plants As A Function Of Streamflow Diversion On The Bishop Creek Watershed, S. D. Smith, J. L. Nachlinger, A. B. Wellington, C. A. Fox

Life Sciences Faculty Research

We investigated the water relations of obli-gate riparian plants on paired diverted and undiverted reaches on Bishop Creek, Eastern Sierra Nevada. Ri-parian plants on diverted reaches had reduced stomatal conductance and water potential compared to plants on undiverted reaches in a dry year, but not in a high runoff year. Juvenile plants on diverted reaches had reduced stomatal conductance and lower midday water potentials relative to surrounding mature trees, a trend that was not observed on undiverted reaches. Plants on diverted reaches possessed significantly smaller, thicker leaves and a reduced total leaf area relative to trees on streamside reaches. Reduced …

Riparian Plant Water Relations Along The North Fork Of The Kings River, California, J. L. Nachlinger, S. D. Smith, R. J. Risser

Life Sciences Faculty Research

Plant water relations of five obligate ripar-ian species were studied along California's North Fork Kings River. Diurnal stomatal conductance, transpi-ration, and xylem pressure potentials were measured throughout the 1986 growing season and in mid-season in 1987. Patterns were similar for all species although absolute values varied considerably. Maximum stomatal conductance occurred early in the day and season during favorable environmental conditions and decreased as air temperature and the vapor pressure difference between the leaf and air increased. Maximum transpiration rates occurred in mid-morning and mid-summer resulting in estimated daily water losses per unit sunlit leaf area of 163-328 mol H2O …

An Isotopic Analysis Of The Hydrology And Riparian Vegetation Water Sources On Bishop Creek, M. L. Space, J. W. Hess, S. D. Smith

Life Sciences Faculty Research

Five power generation plants along an eleven kilometer stretch divert Bishop Creek water for hydro-electric power. Stream diversion may be adversely affecting the riparian vegetation. Stable isotopic analysis is employed to determine surface water/ground-water interactions along the creek. surface water originates primarily from three headwater lakes. Discharge into Bishop Creek below the headwaters is primarily derived from ground water. The average δD and δ18O values are significantly different for surface water and ground water that an isotopic analysis can delineate between these two components of flow. Therefore isotopic shifts along the creek can determine gaining reaches. In addition, by knowing …

Enhancement And Monitoring Of The Procambarus Clarkii Population In Lake Mead, Mikell Beth Hager

UNLV Retrospective Theses & Dissertations

Procambarus clarkii are found in extremely low numbers throughout Lake Mead, AZ-NV. The crayfish are an important dietary component for game fish. Enhancement of the crayfish population would broaden the fishery forage base. Crayfish were stocked and monitored in a study cove on Saddle Island to determine if the Procambarus clarkii population could be enhanced. A trapping survey of the area after the following reproductive season yielded low numbers of crayfish. A comparison of pre-stocking and post-stocking catch per trap day (CPTD) values revealed no significant increase in the population. Procambarus clarkii population growth is limited by environmental factors in …

What Is The Health Impact Of Day Care Attendance On Infants And Preschoolers?, Ruth L. Berkelman, Mary Guinan, Phen B. Thacker

School of Public Health Faculty Research

The impact of various child care arrangements on the health of infants and preschool children is not known in any systematic way, yet by 1990 more than 10 million of these children may be receiving their care in day care facilities (1). Concerns over the health of these children and health practices within day care facilities have already led some States to place regulation of day care facilities under the jurisdiction of the department of health (2,3), and others are presently considering such legislation. In addition, the American Academy of Pediatrics has recently published "Health in Day Care," a manual …

Herpes Simplex Virus Type 2 Antibodies: High Prevalence In Monogamous Women In Costa Rica, Mark W. Oberle, Luis Rosero-Bixby, Francis K. Lee, Maria Sanchez-Braverman, A J. Nahmias, Mary Guinan

School of Public Health Faculty Research

We studied the prevalence of antibody to Herpes simplex virus types I and 2 (HSV-I and HSV-2) in 766 randomly selected Costa Rican women 25-59 years of age in a national household survey in 1984-1985. Overall, 97.1% were seropositive for HSV-l and 39.4% for HSV -2. Only 1.1% of HSV -2 seropositive women gave a history of symptomatic genital herpes. HSV-2 virus antibody increased with age and with the number of lifetime sexual partners. HSV -2 seroprevalence among women who reported only 1 lifetime sexual partner was almost twice as high as the prevalence among women who denied sexual experience …

Unlv 1989-90 Rebel Basketball Guide, University Of Nevada, Las Vegas

UNLV Basketball Programs

A guide for Rebel Basketball from 1989-1990.

Unlv Lady Rebels 1989-1990, University Of Nevada, Las Vegas

UNLV Basketball Programs

1989-1990 Lady Rebel Outlook

Lady Rebel Player Biographies

Bert Leavitt Memorial Scholarship

Lady Rebel Opponents

1988-1989 Year in Review

Meet the Lady Rebels

The Record Book

Thomas and Mack Center

Women's Basketball Boosters

This is UNLV

Big West Conference

1989-1990 Lady Rebel Schedule

A Two-Dimensional Numerical Model Of The High Electron Mobility Transistor, Sze-Him Ng

UNLV Retrospective Theses & Dissertations

A two-dimensional numerical model of the high electron mobility transistor (HEMT) with consideration of quantization in the channel is presented. In this model, the spatial spread of the electron concentration in the quantum well normal to the heterojunction is taken into consideration by solving Schrodinger's and Poisson's equations self-consistently. The Boltzmann transport equation in the form of a current continuity equation and an energy transport equation is solved to obtain the transient transport behavior. Transport of carriers takes place in two layers in the GaAs region: the lowest subband of the quantum well and a non-quantized bulk layer; The simulation …

Dynamic Analysis Of Rotating Fan Structures By The Finite Element Method, Mohamed Said Rouas

UNLV Retrospective Theses & Dissertations

The Finite Element Method is used to determine the fundamental mode shapes and frequencies of fan structures. The analysis is performed on five fan structures, having different geometries, under static conditions and under centrifugal forces at various angular velocities. The results of the analysis are correlated with experimental data. The Southwell Coefficient, which takes into account the effect of centrifugal stiffening/softening, is determined for each fan and used for the prediction of its dynamic response and critical speeds. The research led to a study of the influence of riveted spider-to-blade connections on the vibration response of propeller fans; This thesis …

Decoupling And Adaptive Control And Stabilization Of Two-Link Elastic Robotic Arm, Arijit Das

UNLV Retrospective Theses & Dissertations

In this thesis the control and stabilization of a two link flexible robotic arm is considered. The first scheme is based on nonlinear inversion, a nonlinear controller is designed for the trajectory control of the joint angles using joint torquers. The inverse controller includes a servocompensator for robustness. A simplified controller has also been designed neglecting the Coriolis and Centrifugal forces; In the second scheme the control system design is based on nonlinear adaptive control and linear stabilization. First a nonlinear adaptive control law is derived such that in the closed-loop system the joint-angles are precisely controlled to track reference …

An Investigation Of Factors Associated With Depression In Older Adults, Katherine Mary Mayhew

UNLV Retrospective Theses & Dissertations

As the population ages, there is a need for continued research into the etiology of geriatric depression and improved ways to detect individuals at risk for developing this disorder. The current study explores relationships between depression, health perception, life satisfaction, and loneliness for 44 older (51-79) subjects. Relationships between the four variables and marital status, bereavement, monthly income, satisfaction with income, residence, occupation, education, size of household, and the number of living children and siblings are also examined; Descriptive statistics for the depression measures and their correlates are presented, followed by a breakdown of the measures by demographic characteristics. Furthermore, …

Analyses Of The Structure And Function Of Lower Colorado River Riparian Plant Communities, David E Busch

UNLV Retrospective Theses & Dissertations

Throughout western North America, riparian ecosystem function has been transformed by anthropogenic influences on riverine environments. Modified flood frequencies, durations or intensities, depressed floodplain water tables, and increased rhizosphere salinities contribute to change in communities formerly dominated by alluvial forest taxa. In addition, the invasion of a naturalized arborescent shrub, Tamarix ramosissima, potentially alters competitive hierarchies and disturbance regimes in riparian ecosystems. To evaluate southwestern riparian community structure and function, comparison of ecophysiological characteristics of dominant woody taxa with site physical parameters was undertaken in riparian ecosystems that are relatively pristine (Bill Williams River) and highly perturbed (lower Colorado River). …

An Ethnographic Analysis Of The Workplace In A Selected Year-Round School, Kelly Ann Sturdy

UNLV Retrospective Theses & Dissertations

This study sought to describe the workplace of the year-round school using the structure of Johnson's workplace theory. The rationale for conducting the study was based on the assumption that the nature of the workplace affects the teaching/learning act. Teachers' perceptions of the workplace ultimately influence their attitudes, efforts, and commitment toward the act of teaching. The year-round school schedule was found to influence teachers' perceptions of their workplace; The frequent breaks of the year-round schedule were perceived as beneficial for both students and teachers by providing alternate vacation opportunities, time for inexperienced teachers to evaluate and plan instructional strategies, …

The Subjective Nature Of Decision-Makers In The Domain Of Objective Sentence Processing, William Bud Brown

UNLV Retrospective Theses & Dissertations

Selective incapacitation has been defined as an objective process whereby violent and/or chronic offenders are isolated and given longer prison terms. The purpose of this process is to keep these offenders out of society for longer periods of time resulting in a safer society. Couched within this utilitarian perspective is the assumption that the social sciences have developed a reputable formula from which future criminal behavior can be accurately predicted. This research, a case study of a Nevada presentence investigation unit, found that all convicted offenders are dealt with using the same criteria applied to violent and/or chronic offenders. This …

Analysis Of Personnel Interview Questions For Student Affairs Positions At Land-Grant Institutions, Theresa Yi-Chin Tung Chiang

UNLV Retrospective Theses & Dissertations

Personnel issues have always played an important part in any operation. There is no denying the fact that proper selection and placement of individuals could be the key to an organization's success. This study was made to compare the variables assessed and questions asked during final interviews to evaluate the candidates for open positions in the division of student affairs at all public land-grant institutions; The theoretical base for the study stressed the necessity of comparing applicants' abilities. Variables being considered during the interviews were categorized as job knowledge, professional attitude, personal qualities, interpersonal skills and miscellaneous. Using these variables …

Evaluating The Chief State School Officer: A Study Of Current Practices, Marianne Sharp Long

UNLV Retrospective Theses & Dissertations

The Chief State School Officer, along with his staff, had the principal duties and responsibilities of the state government in the administration of education. In an era of increased educational accountability, little information was available on the evaluation procedures for Chief State School Officers. The purpose of this study was to conduct an assessment of the policy, scope, and methods used by State Boards of Education in the evaluation of the Chief State School Officers; Questionnaires were mailed to each State Board of Education President and each Chief State School Officer in order to elicit specific information concerning the evaluation …