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1999

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The Relationship Between Psychosocial Momentum, Precipitating Events, And Tennis Match Outcome, Tracey M Covassin Jan 1999

The Relationship Between Psychosocial Momentum, Precipitating Events, And Tennis Match Outcome, Tracey M Covassin

UNLV Retrospective Theses & Dissertations

The purpose of this experiment is to determine whether mood states, anxiety, self-confidence, precipitating events, and psychological momentum play a role in tennis match outcome. The following hypotheses were proposed: (a) tennis match outcome may be influenced by individual's pre-competition cognitive level, (b) tennis match outcome may be influenced by individual's pre-competition mood state, (c) a precipitating event or series of events may influence tennis match outcome, and (d) psychological momentum is present in tennis matches. Fifteen minutes prior to each match 24 NCAA division 1 male tennis players completed the Competitive State Anxiety Inventory-2 and the Profile of Mood …

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Self-Stabilizing Network Orientation Algorithms In Arbitrary Rooted Networks, Shivashankar Gurumurthy Jan 1999

Self-Stabilizing Network Orientation Algorithms In Arbitrary Rooted Networks, Shivashankar Gurumurthy

UNLV Retrospective Theses & Dissertations

Network orientation is the problem of assigning different labels to the edges at each processor, in a globally consistent manner. A self-stabilizing protocol guarantees that the system will arrive at a legitimate state in finite time, irrespective of the initial state of the system. Two deterministic distributed network orientation protocols on arbitrary rooted, asynchronous networks are proposed in this work. Both protocols set up a chordal sense of direction in the network. The protocols are self-stabilizing, meaning that starting from an arbitrary state, the protocols are guaranteed to reach a state in which every processor has a valid node label …

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Monoaromatic Hydrocarbons And Aldehydes In Las Vegas Air, Linhong Jing Jan 1999

Monoaromatic Hydrocarbons And Aldehydes In Las Vegas Air, Linhong Jing

UNLV Retrospective Theses & Dissertations

The observed concentrations of the monoaromatic hydrocarbons and aldehydes show significant correlations within the various monoaromatic hydrocarbons, and within the various aldehydes as well as between the two groups of compounds. Moderate or good correlations between observed concentrations of target analytes, monoaromatic hydrocarbons and aldehydes, and other pollutants, CO, NO, NO{dollar}\sb2{dollar} were also found. These observations are consistent with vehicle emission as a major source of monoaromatic hydrocarbons and a primary source of aldehydes in ambient air; CO normalized concentrations were used to infer the occurrence of photochemical reactions in atmosphere. There are significant negative correlations between CO normalized concentrations …

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Sorption And Desorption Of Selenium In Cement Formulations, Elizabeth Ann Johnson Jan 1999

Sorption And Desorption Of Selenium In Cement Formulations, Elizabeth Ann Johnson

UNLV Retrospective Theses & Dissertations

Twenty-seven cementitious formulations containing three levels of water/solids (45%, 50%, 55%), three weight percentages of silica fume (0%, 10%, 20%), and three weight percentages of clay (0%, 3%, 5%) were evaluated for their ability to effectively sorb selenium at three pH levels (5.9, 8.7, 12.4). A Type V Portland cement was utilized. Distribution coefficients (K{dollar}\sb{\rm d}{dollar} values) determined for each cement formulation ranged from 250-1600 L kg{dollar}\sp{-1}{dollar}. Findings suggest that increased water/solids ratios tend to maximize selenium sorption while adding silica fume or 5% clay appears to decrease sorption. A sorption/desorption study was conducted on cementitious formulations containing three levels …

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The Perception Of Korea As A Convention Destination, Sung-Ae Jung Jan 1999

The Perception Of Korea As A Convention Destination, Sung-Ae Jung

UNLV Retrospective Theses & Dissertations

The purpose of this study was to explore the perception of Korea as a convention destination by international convention attendees in the wake of the Asian financial crisis; Convention business has steadily grown in the past decade to become a significant segment of the Korean tourism industry. In spite of the importance of the market, little research has been undertaken to illustrate the perception of actual international convention attendees about Korea as a convention destination; This paper reports information derived from a study of the perceptions of 175 international convention attendees. The major findings indicated that there were significant differences …

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Responses Of Python Regius To Animal Chemosensory Stimuli: Implications Of Foraging Ecology, Albert Klein Jan 1999

Responses Of Python Regius To Animal Chemosensory Stimuli: Implications Of Foraging Ecology, Albert Klein

UNLV Retrospective Theses & Dissertations

Python regius is considered to be a sit-and-wait forager and has been reported to attempt capture of live and dead homeothermic prey. This preference for homeothermic prey may be innate and is not dependent on thermal cues. Chemosensory stimuli appear to be the only stimuli which may indicate to P. regius the metabolic group that a dead prey item at room temperature item may belong to. Snakes were exposed to novel odors from homeothermic and poikilothermic animals. Prey Searching Behavior (amount of locomotion) and Information Gathering Behavior (tongue flicking) were observed. Habituation to odors resulted in decreased behaviors. Odors of …

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A 3-Dimensional H-Adaptive Algorithm For Groundwater Flow And Contaminant Transport, Lan Li Jan 1999

A 3-Dimensional H-Adaptive Algorithm For Groundwater Flow And Contaminant Transport, Lan Li

UNLV Retrospective Theses & Dissertations

The simulation of contaminant transport through the subsurface is a very useful way to effectively design mitigation methods for cleanup and prevention of the deterioration of groundwater; The GWADAPT3 code is developed using the finite-element method and mesh adaptation to simulate groundwater flow and contaminant transport. The formulation is based on the equations for conservation of mass, Darcy's law for an anisotropic medium, and the time-dependent species transport equations. Petrov-Galerkin weighting of the advection terms provides numerical stability. An explicit time marching scheme is used to solve the transient equations. By utilizing unstructured adaptive meshing, concentration is accurately resolved; Benchmark …

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Leakage Gate Current In A Heterostructure Field Effect Transistor, Amit Ranbir Mahajan Jan 1999

Leakage Gate Current In A Heterostructure Field Effect Transistor, Amit Ranbir Mahajan

UNLV Retrospective Theses & Dissertations

A theoretical formulation for the leakage gate current in a heterostructure insulated-gate field effect transistor (HIGFET) is presented. Three important components of the leakage gate current, namely 2-D tunneling, 3-D tunneling and thermionic emission current, are considered. The conduction band edge profile of the HIGFET is obtained by a self consistent solution to the Poisson and Schroedinger equations. The transmission coefficient for 2-D and 3-D tunneling currents is obtained by solving the Schroedinger equation; The leakage gate currents are obtained as a function of the gate voltage for the AlI-nAs/GaInAs and AlGaAs/GaAs based HIGFET structures. For the AlInAs/GaInAs system, the …

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A Comparison Of Fast And Slow Contraction Speeds Using Electromyography, Philip James Melhorn Jan 1999

A Comparison Of Fast And Slow Contraction Speeds Using Electromyography, Philip James Melhorn

UNLV Retrospective Theses & Dissertations

The purpose of this study was to determine if differences in EMG activity existed between fast and slow contraction speeds during isolated, one-armed biceps curls to muscle failure. Participants performed one set of biceps curls to muscular failure on two separate occasions at different contraction speeds. Constant load equal to 75% of 1RM was used for each test. The dependent variables were integrated EMG (iEMG), percent change in mean frequency, and time to muscular failure. Integrated EMG measurements revealed significantly greater muscle activity for the slow contractions (t = 4.76, p {dollar}<{dollar}.001). The time to muscular failure also showed significant differences having the fast contraction speed achieve muscle failure faster than the slow contraction speed (t = 5.23, p {dollar}<{dollar}.001). The comparison of frequency data failed to reach significance. A significant correlation (r =.514) was determined for iEMG and time to muscular failure. These results suggest that differences exist in iEMG and time to muscle failure between fast and slow contraction speeds.

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The Aerodynamic Response Of Airborne Discs, Timothy Lewis Mitchell Jan 1999

The Aerodynamic Response Of Airborne Discs, Timothy Lewis Mitchell

UNLV Retrospective Theses & Dissertations

A study has been conducted to characterize the flow over a free-flying disc. In this study, three types of discs are analyzed in a series of stationary experiments, and a single disc is analyzed in a spinning experiment. Two dimensionless parameters dominate the experiments, the Reynolds number and the tip speed ratio. The first experiment measured the lift and drag at varying angles of attack on a stationary disc. The second stationary experiment was a unique measurement of the center of lift of a disc as a function of velocity. The third stationary experiment was a tuft test to describe …

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A Heuristic Approach For Path Planning For Redundant Robots, George Petrescu Jan 1999

A Heuristic Approach For Path Planning For Redundant Robots, George Petrescu

UNLV Retrospective Theses & Dissertations

A new method to solve the trajectory generation for a redundant manipulator is proposed. It avoids traditional computationally intensive methods by relying on the human experience; The proposed method uses a fuzzy logic controller to generate the magnitude of the angles needed to move the end effector to the next target point. The inputs to the controller are the desired displacement of the end effector and the elements of the jacobian matrix that correspond to the considered joint, while the output is the angle magnitude of the joint needed to reach the target point; An algorithm is used to determine …

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Experimental Study Of Drying Of A Porous Medium At Sub-Residual Saturations, Adaikkalavan Kumar Sathappan Jan 1999

Experimental Study Of Drying Of A Porous Medium At Sub-Residual Saturations, Adaikkalavan Kumar Sathappan

UNLV Retrospective Theses & Dissertations

An experimental study has been conducted to understand the drying effects in sub-residual saturated systems. Different flow rates and isothermal wall temperatures were used in the experiments. In two experimental runs, the test section was maintained at room temperature and gas flow initiated. Four other cases were started initially with heating up the porous medium with no flow, and then letting nitrogen gas flow through the test-section after a steady-state temperature distribution had been reached (denoted in what follows as the "steady heating case"); Temperatures throughout the bed and entering and exiting humidity values as a function of time among …

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Soluble Mineral Content Of Soils Using Electrical Conductivity, Merrill Gene Schweppe Jan 1999

Soluble Mineral Content Of Soils Using Electrical Conductivity, Merrill Gene Schweppe

UNLV Retrospective Theses & Dissertations

Soils with soluble salts occur in semi-arid and arid regions worldwide. The soluble mineral percentage of soil is determined by measuring the weight lost by diluting the soil mass with a fixed quantity of water. Correct estimation of soluble mineral content is made at the point of unsaturation. In the absence of clay, grain size does not affect determination of electrical conductivity for soils. Measurement of the electrical conductivity for a series of dilution ratios provides a reliable means of determining the correct dilution ratio. Measurement of the electrical conductivity of a subset of low water-soil dilution ratios and a …

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The Relationship Of Hamstring And Hip Flexor Flexibility To Injury Rates In Collegiate Football Players, Joseph Slat Jan 1999

The Relationship Of Hamstring And Hip Flexor Flexibility To Injury Rates In Collegiate Football Players, Joseph Slat

UNLV Retrospective Theses & Dissertations

Fifty collegiate football players volunteered to participate in the study to examine the relationship between flexibility and injury rate of muscle strain, specifically the Hamstring and Hip Flexor muscle groups. Participants were evaluated for range of motion and monitored for non-contact hamstring strains occurring throughout the competitive seaSon Participants with any muscle strain within the past year were excluded from this study. Measurement of the hamstrings was done with a passive knee extension test; hip flexors were measured with prone hip extension test. Sixteen hamstring strains occurred within the fifty participants. Correlation statistics were done to show relationship between the …

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A Method For Determining Elements For Elemental Signature Analysis Of Groundwater And Treated Lake Mead Water, F. Xavier Suarez Jan 1999

A Method For Determining Elements For Elemental Signature Analysis Of Groundwater And Treated Lake Mead Water, F. Xavier Suarez

UNLV Retrospective Theses & Dissertations

Elemental signature analysis (ESA) is a term that describes the use of the presence/absence or relative abundance of elements in samples. Several studies have been performed on the identification of these elemental signatures or fingerprints of water using inductively coupled plasma mass spectrometry (ICP-MS); Lake Mead is the primary water supply for the Las Vegas Valley. During the summer months, several large underground aquifers are used to supplement the Lake Mead water supply. Treated Lake Mead water is recharged during the low demand months to several of these aquifers. The Las Vegas Valley is surrounded by many private groundwater wells …

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Summary Fading Knowledge Of Results (Kr): Test For The Dynamic Acquisition Protocols, Changjiang (River) Sun Jan 1999

Summary Fading Knowledge Of Results (Kr): Test For The Dynamic Acquisition Protocols, Changjiang (River) Sun

UNLV Retrospective Theses & Dissertations

The primary purpose of this study was to examine the effects of dynamic acquisition protocols by comparing dynamic and static KR schedules in a single experiment. Five groups of participants (n = 13 per group) completed 90 acquisition trials of a force production task. The analysis of delayed no-KR retention test revealed that the participants in the summary fading KR group performed better than the three static KR groups, indicating that the dynamic acquisition protocols produces more efficient learning than static acquisition protocols. This finding is interpreted as support for Adams' theory (1971) that the most appropriate acquisition protocol would …

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Classification Of Galaxies Using Fractal Dimensions, Sandip G Thanki Jan 1999

Classification Of Galaxies Using Fractal Dimensions, Sandip G Thanki

UNLV Retrospective Theses & Dissertations

The classification of galaxies is morphological. Shapes of the galaxies range from the very simple (e.g. elliptical galaxies) to the highly complex (e.g. irregular galaxies). Analyzing a measure of complexity for such shapes could lead to automatic classification. Fractal dimension, a quantity related to the complexity of a given shape, could be such a measure. Capacity dimension and correlation dimension are two of the several types of fractal dimensions. In this project, correlation dimensions and the capacity dimensions of the contours generated around different intensity levels of the galaxy images, versus the intensity levels were computed. It was found that …

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Impacts Of Stock Prices And Interest Rates On Tourism Consumption, Ming-Chih Tsai Jan 1999

Impacts Of Stock Prices And Interest Rates On Tourism Consumption, Ming-Chih Tsai

UNLV Retrospective Theses & Dissertations

Tourism industry has emerged as a leader in the U.S.'s service economy in the last decade. Meanwhile, stock markets and interest rates have been playing a more important role in Americans everyday lives. Prior research mainly focused on the economic impact of travel and tourism industry, but there are very few studies regarding how changes in economic factors will affect domestic tourism industry. This study focuses on measuring the impacts of stock prices and interest rates on tourism consumption. The results of this study show that stock prices and interest rates do have a certain amount of impacts on people's …

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Control Of Flexible Joint Robotic Manipulator Using Tuning Functions Design, Pavan Krishna Aripirala Venkata Jan 1999

Control Of Flexible Joint Robotic Manipulator Using Tuning Functions Design, Pavan Krishna Aripirala Venkata

UNLV Retrospective Theses & Dissertations

The goal of this thesis is to design the controller for a single arm manipulator having a flexible joint for the tracking problem in two different cases. A controller is designed for a deterministic case wherein the plant parameters are assumed to be known while another is designed for an adaptive case where all the plant parameters are assumed to be unknown. In general the tracking problem is; given a smooth reference trajectory, the end effector has to track the reference while maintaining the stability. It is assumed that only the output of the manipulator, which is the link angle, …

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Business Practice Knowledge Of Advanced Practice Nurses In Nevada, Sandra Jean Wheaton Jan 1999

Business Practice Knowledge Of Advanced Practice Nurses In Nevada, Sandra Jean Wheaton

UNLV Retrospective Theses & Dissertations

Advanced practice nurses (APNs) are entering into employment practice relationships and working in a variety of clinical practice settings without the benefit of adequate preparation in organization management, business and finance. While the evolution of APN clinical expertise is well documented, their knowledge base in organizational management, business and finance is not. This exploratory, descriptive study discovers what business knowledge APNs in Nevada possess and their perception of its adequacy for practice; A 28-item questionnaire was mailed to all APNs registered with the Nevada State Board of Nursing. Eleven items describe the population. The remaining items address the research questions: …

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The Effect Of Dietary Creatine Supplementation On Compensatory Muscle Hypertrophy And Performance Characteristics Of Specific Fiber Types, Robert Earl Young Jan 1999

The Effect Of Dietary Creatine Supplementation On Compensatory Muscle Hypertrophy And Performance Characteristics Of Specific Fiber Types, Robert Earl Young

UNLV Retrospective Theses & Dissertations

An animal model was used to determine the effect of dietary creatine supplementation on compensatory muscular hypertrophy and electrically stimulated performance of those muscles. Thirty-six rats were divided evenly into six groups. Two groups were surgical controls, two groups had the tibialis anterior ablated, to hypertrophy the extensor digitorum longus (EDL), and two groups the gastrocnemius and the plantaris ablated, to hypertrophy the soleus. One of each of these groups had their diet supplemented with creatine monohydrate. The size of the EDL and soleus were measured following surgical removal of the synergistic muscle and a 5-week supplementation period. Peak force, …

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Minority Housing Conditions In Urban Settings: Proposals For The Improvement Of Las Vegas' Amerindian Homes, Patricia Epee Stissi Jan 1999

Minority Housing Conditions In Urban Settings: Proposals For The Improvement Of Las Vegas' Amerindian Homes, Patricia Epee Stissi

UNLV Retrospective Theses & Dissertations

Native Americans living on reservations occupy some of the worst housing in the United States. But, nowadays, both on reservations and in urban settings, a small majority (about 56%) of them use the same types of architectural space as any other Americans. For example, HUD homes on the reservations, apartment complexes and small houses in cities, sometimes Public Housing. This research will explore a way to improve American Indians housing conditions while accentuating the need for sustainable and affordable housing in harmony with the tribal environment, because they bring a unique cultural heritage to urban society; For the purpose of …

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Handling Police Misconduct In An Ethical Way, Daniel Patrick Barry Jan 1999

Handling Police Misconduct In An Ethical Way, Daniel Patrick Barry

UNLV Retrospective Theses & Dissertations

Police misconduct has always been a serious problem in America. Historically, reform efforts have failed due to an organizational culture that is resistant to change. Past reforms have been aimed at individual incidents, disregarding underlying organizational problems. Improving public perception has been the goal of past reforms, as opposed to improving organizational soundness; Reform efforts need to be directed at enhancing police organizational culture. These changes will improve workplace ethos, allowing virtuous conduct to flourish. Advancing this organizational culture will encourage police officers to act in a manner consistent with the high trust we vest in this vocation; Justice, Truthfulness …

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Pro-Social And Anti-Social Effects Of Television Viewing On Adolescents: Speculations Based On Family Situation Comedy Content, Eunette Gentry Jan 1999

Pro-Social And Anti-Social Effects Of Television Viewing On Adolescents: Speculations Based On Family Situation Comedy Content, Eunette Gentry

UNLV Retrospective Theses & Dissertations

Researchers theorize that verbal insults within television family interactions may create images of dysfunctional families that serve as a paradigm for young viewers. This study conducted a content analysis of television programming and speculated about the possible development of antisocial behavior in adolescents due to television viewing; "The Cosby Show" and "Roseanne" were chosen in this research sample because previous research finds that family oriented situation comedies are among children's favorite television programs. Ten episodes of each series were recorded and analyzed for their anti-social verbal content. The brother-sister sibling relationship was analyzed within each episode and coded using eight …

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Elder Care: An Evaluation Of Communication Resources For Lay Caregivers In Southern Nevada, Deborah Lee Hauth Jan 1999

Elder Care: An Evaluation Of Communication Resources For Lay Caregivers In Southern Nevada, Deborah Lee Hauth

UNLV Retrospective Theses & Dissertations

Hidden behind closed doors of nursing homes, hospitals and neighborhood residences, was a segment of the population suffering from dementing illnesses. Although seldom seen, these older Americans presented significant challenges for the family members caring for them. This study focused attention on these lay caregivers and the effectiveness of community resources, from their perspective. With assistance from Southern Nevada Alzheimer's Association staff, a survey was conducted. The results showed agencies rated as "satisfactory" in their efforts to provide information, with the Alzheimer's Association newsletter ranked as the primary source of information for caregivers. While the survey provided insights regarding caregivers …

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Socially Desirable Responding On The Machiavellianism Scale: Response Bias Or Construct?, Maryn Lyn Hoefer Jan 1999

Socially Desirable Responding On The Machiavellianism Scale: Response Bias Or Construct?, Maryn Lyn Hoefer

UNLV Retrospective Theses & Dissertations

The Mach IV scale measures Machiavellianism, the propensity to be manipulatory in interpersonal relations. The Mach IV has been criticized for social desirability response bias, or the tendency to present oneself in an overly favorable light. Socially desirable responding, as measured by the Balanced Inventory of Desirable Responding, however, was postulated to reflect a facet of the Machiavellianism construct. A coalition-bargaining game was played with college students (N = 126), using 21 groups each of sex-segregated triads in a 2 (sex) by 3 (high, medium, and low levels of Machiavellianism) between-subjects design. Game scores served as the dependent variable and …

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Media Convergence, Obscenity Law And The Internet, Lynette Lim Jan 1999

Media Convergence, Obscenity Law And The Internet, Lynette Lim

UNLV Retrospective Theses & Dissertations

Digitization and innovation in technology has resulted in a climate of media convergence. Media convergence occurs when elements of previously distinctly separate media forms co-mingle to create new capabilities. Although there is no such thing as complete convergence as of yet, there is probably the closest thing to a purely converged medium. Any user is able to access a variety of text, hypertext, graphic, audio and video files online. However, it is also because of media convergence that makes the Internet difficult to regulate. Laws that were proposed to provide some form of legal control to the access of online …

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Fall From Grace: United States Images Of Japan, 1894--1921, Darryl Scott Hushaw Jan 1999

Fall From Grace: United States Images Of Japan, 1894--1921, Darryl Scott Hushaw

UNLV Retrospective Theses & Dissertations

This thesis examines the shifting American perceptions of Japan in the period from the Sino-Japanese War to the Washington Naval Conference, as expressed in the popular press, government statements, missionary speeches, and other printed materials. During this period, the American image of Japan changed dramatically, and the image of the Japanese was transformed from an admirable, if exotic, people, to formidable economic, cultural, and strategic rivals. While Theodore Roosevelt pursued a pragmatic East Asian policy based on the interests and capabilities of the nations in question, his successors altered this policy, with the Taft Administration mounting an economic challenge to …

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The Rhetoric Of Martyrdom: A Case Study Analyzing The Rhetorical Situations Of Joan Of Arc, John Brown And Jim Jones, Chris S Meservey Jan 1999

The Rhetoric Of Martyrdom: A Case Study Analyzing The Rhetorical Situations Of Joan Of Arc, John Brown And Jim Jones, Chris S Meservey

UNLV Retrospective Theses & Dissertations

The study provides a critical analysis of the rhetoric used to establish a martyr in history. An indepth definition of martyrdom, along with a criteria for martyrs, is utilized in support of the theories. The text claims that the rhetoric of a situation is the key to becoming a martyr. Utilizing the theory of criteria for martyrdom as the tool, histories, biographies, discourses, and print media provide the input for the analysis; The examination breaks into three case studies: Joan of Arc, John Brown, and Jim Jones The examples of Joan of Arc and John Brown illustrate the positive role …

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Baseball's Manifest Destiny: The Good, The Bad, And The Ugly, Patrick Valenti Miller Jan 1999

Baseball's Manifest Destiny: The Good, The Bad, And The Ugly, Patrick Valenti Miller

UNLV Retrospective Theses & Dissertations

Brooklyn Dodgers fans blame Walter O'Malley for destroying a way of life and tarnishing the golden image of the postwar years when, in 1957, he relocated their beloved baseball team to the West. The relocation finds its impetus in American adherence to nineteenth-century Manifest Destiny and a major demographic shift following a post-World War II economic and technological boom; For the first half of the twentieth century, baseball transcended a mere rooting for a collection of superb athletes; civic identity rested in one's baseball team. Losing a team to another city was devastating. For some cities baseball provided the affirmation …

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