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1998

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The Relationship Of Teacher Cognitive Style And Teacher Job Satisfaction, Moderated By Administrator Management Style, Holly Shella Jaacks Jan 1998

The Relationship Of Teacher Cognitive Style And Teacher Job Satisfaction, Moderated By Administrator Management Style, Holly Shella Jaacks

UNLV Retrospective Theses & Dissertations

Success as a school administrator strongly depends upon the complex interplay of teacher cognitive style, teacher satisfaction on the job, and the effectiveness of the principal's administrative management style. Nonetheless, the supervision of teachers within their cognitive style has had little research or attention given to it. According to the literature, administrative management style greatly influences teachers perceptions of satisfaction on the job. A wide variety of variables, directly impacted by administrative management style, influence a teachers degree of job satisfaction; This study surveyed teacher's cognitive style, as determined by Witkin's Field Dependence, Field Independence model utilizing the Group Embedded …

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Critical Multiculturalism In The Classroom: From Theory To Practice, Denise Michelle Dalaimo Jan 1998

Critical Multiculturalism In The Classroom: From Theory To Practice, Denise Michelle Dalaimo

UNLV Retrospective Theses & Dissertations

Since Paulo Freire's (1970) revolutionary work Pedagogy of the Oppressed, "radical" (critical/feminist/multicultural) educators have endeavored to change the face of education by altering traditional power relations and by including the work and experiences of previously under- or unrepresented groups. Research to date in the field of radical pedagogy has been largely focused on and performed in the small and intimate classroom. Many of the approaches and techniques proposed by radical educators---though effective in smaller classes---are difficult to implement in the larger, more impersonal classroom which is becoming more and more prevalent in contemporary higher education. This research has been largely …

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Experimental Investigation Of Shear Deformation In Laboratory Prepared Layered Soil Specimens, Nicholas William Hudyma Jan 1998

Experimental Investigation Of Shear Deformation In Laboratory Prepared Layered Soil Specimens, Nicholas William Hudyma

UNLV Retrospective Theses & Dissertations

The purpose of this study was to identify and describe the shear deformation mechanisms and structures of laboratory prepared layered soil specimens. Soil specimens made of alternating layers of sand and clay were produced in the laboratory with different layering schemes and layering geometries. Layering schemes are groups of specimens with similar layering geometries. Layering geometries refers to the number of layers of sand and clay, thicknesses of the layers and the layer positions within the specimen. The specimens were sheared perpendicular to layering using a specially designed deformation apparatus and their deformation mechanisms and deformation structures were identified and …

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Fraction Instruction For Students With Disabilities: Comparing Two Teaching Sequences, Frances Mary Butler Jan 1998

Fraction Instruction For Students With Disabilities: Comparing Two Teaching Sequences, Frances Mary Butler

UNLV Retrospective Theses & Dissertations

This study investigated the effects of teaching middle-school students with mild to moderate disabilities equivalent fraction concepts and procedures using the concrete-representational-abstract (CRA) instructional sequence or the representational-abstract (RA) instructional sequence. Twenty-six students formed the CRA group, and twenty-four students formed the RA group, while sixty-five eighth-grade students without disabilities served as a contrast group. The two treatment groups received carefully sequenced instruction over ten lessons. The only difference between the two treatment groups was that the CRA group used concrete manipulative devices for the first three lessons while the RA group used representational drawings. The eighth-grade contrast group received …

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Special Education Students: Which Ones Are Prepared To Receive A High School Diploma?, Rhoton Titus Hudson Jan 1998

Special Education Students: Which Ones Are Prepared To Receive A High School Diploma?, Rhoton Titus Hudson

UNLV Retrospective Theses & Dissertations

This study sought to determine whether statistically significant differences between students with disabilities who pass and those who fail the Nevada High School Proficiency Examination are accounted for by demographic variables alone, or if they can also be attributed to educational variables. To establish the basis for this study, legislation such as IDEA and Goals 2000 was examined, recent literature was reviewed, and court cases involving testing students with disabilities on standardized and minimum competency tests were studied; The study follows 965 students with disabilities who were in the eleventh grade during the 1998--99 school year through five administrations of …

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The Effectiveness Of Traditional Instructional Methods In An Online Learning Environment, Steven Bradford Smith Jan 1998

The Effectiveness Of Traditional Instructional Methods In An Online Learning Environment, Steven Bradford Smith

UNLV Retrospective Theses & Dissertations

For more than a century, the most predominant form of instruction in higher education has been classroom-based and instructor-led. Today, this traditional approach to learning is being challenged by new technologies such as multimedia, telecommunications, and the Internet. It has been suggested that the effectiveness of traditional pedagogical methods in alternative learning environments may be resolved through the creation of a new domain for educational interaction referred to as online education (Harasim, 1990); There has been much research focused on the advantages of teaching university courses online (Davis, Odell, Abbitt, Amos, 1999; Hiltz, 1994; Harasim, 1990). However, there is little …

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Effects Of Discrete Wavelet Compression On Automated Mammographic Shape Recognition, Ravikiran Kalluri Jan 1998

Effects Of Discrete Wavelet Compression On Automated Mammographic Shape Recognition, Ravikiran Kalluri

UNLV Retrospective Theses & Dissertations

At present early detection is critical for the cure of breast cancer. Mammography is a breast screening technique which can detect breast cancer at the earliest possible stage. Mammographic lesions are typically classified into three shape classes, namely round, nodular and stellate. Presently this classification is done by experienced radiologists. In order to increase the speed and decrease the cost of diagnosis, automated recognition systems are being developed. This study analyses an automated classification procedure and its sensitivity to wavelet based image compression; In this study, the mammographic shape images are compressed using discrete wavelet compression and then classified using …

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Howells, Dickinson, Lewis: An Exercise In Reading The Interracial Canon, Craig Andrew Magee Jan 1998

Howells, Dickinson, Lewis: An Exercise In Reading The Interracial Canon, Craig Andrew Magee

UNLV Retrospective Theses & Dissertations

Howells, Dickinson, Lewis: An Exercise in Reading the Interracial Canon has two purposes. First, it offers detailed readings of three American novels: An Imperative Duty by William Dean Howells (1891), What Answer? by Anna Dickinson (1868), and Kingsblood Royal by Sinclair Lewis (1947). These readings are accomplished within the context of the "interracial canon", a set of writings dealing with the expression of various aspects of interracial relationships. The interracial canon, as well as its specialized vocabulary and unique theoretical outlook, is roughly sketched in an introduction and several appendices.

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Application Of Cubic B-Splines To Boundary Value And Optimal Control Problems, Deborah Ann Skidmore Jan 1998

Application Of Cubic B-Splines To Boundary Value And Optimal Control Problems, Deborah Ann Skidmore

UNLV Retrospective Theses & Dissertations

In this thesis, a one-dimensional second order differential two-point boundary value problem will be approximated by a variational method using cubic B-splines. This method will then be extended to solving N-dimensional two-point boundary value problems. In the final part of the thesis, certain control problems will be converted into boundary value problems, which in turn, will be approximated by the previous variational method which uses cubic B-splines.

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A Study Of The Influence Of Physical Parameters On The Drying Of Porous Media, Jason C Viggato Jan 1998

A Study Of The Influence Of Physical Parameters On The Drying Of Porous Media, Jason C Viggato

UNLV Retrospective Theses & Dissertations

An experimental setup is developed to observe the mass transfer that occurs in the drying of saturated porous media due to bulk flow of gas. The analysis and equations are developed in a one-dimensional perspective, and focus on the convection and evaporation that results. Humidity readings are monitored at various locations and used in the analysis of the results. These procedures are used in test cases for Steel spheres and Ceramic beads both 4.5 mm in diameter at.25 L/min,.5 L/min,.75 L/min and 1 L/min flow rates; Drying times and humidity plots versus time for both steel and ceramic are witnessed …

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Drazin Inverse And Its Application To Linear Degenerate Systems, Trevor Allen Wilcox Jan 1998

Drazin Inverse And Its Application To Linear Degenerate Systems, Trevor Allen Wilcox

UNLV Retrospective Theses & Dissertations

In the thesis, we review some recent progresses on the study of Drazin inverses and the study of linear degenerate systems with nonsingular pencil. Properties of the Drazin inverse are discussed. An application of Drazin inverses to linear degenerate systems is presented. Furthermore, a numerical algorithm for calculating Drazin inverses and a FORTRAN program are provided.

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Flexible Ac Transmission System Compensation On A Utility Transmission System, Julia Jesi Black Jan 1998

Flexible Ac Transmission System Compensation On A Utility Transmission System, Julia Jesi Black

UNLV Retrospective Theses & Dissertations

Power system security can be increased by the use of flexible AC Transmission System devices, FACTS, in transmission systems experiencing high power flows. This thesis presents an analysis of one of these devices, namely, a Thyristor Controlled Series Compensator, TCSC, as applied to the Nevada Power Company 230kV southern transmission network. The methodology for choosing the appropriate location for the device and equations to accurately analyze the TCSC are developed. The analysis of the utility network is divided into three stages: (1) development of a benchmark, pre-TCSC case, establishing the real and reactive power transfer capabilities of the network, (2) …

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An Aristotelian Ethic For The Professional Naval Officer, Ronald L Smith Jan 1998

An Aristotelian Ethic For The Professional Naval Officer, Ronald L Smith

UNLV Retrospective Theses & Dissertations

The Navy's training revolves around the core values of Honor, Courage and Commitment. It is my purpose here to propose an Aristotelian based ethic for the professional U.S. Naval Officer. Chapter One will be my introduction. In Chapter Two I will look at Aristotle's practical reasoning and what it takes to attain excellence. Chapter Three will explore the U.S. government's broken covenant with members of the armed forces. The law and morality pertaining to warriors will be addressed in Chapter Four. Chapter Five will address the apprenticeship of junior officers and their need for growth and mentoring. I will conclude …

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Philosophical Foundations, Social Power And Social Work Practice, Timothy Duane Hamilton Jan 1998

Philosophical Foundations, Social Power And Social Work Practice, Timothy Duane Hamilton

UNLV Retrospective Theses & Dissertations

The contemporary philosophical landscape, which affects the fields of philosophical endeavor and the ways power is framed, is described. The covert manner these influences effect social work practice is made more visible through the use of ethically oriented decision making patterns; Ways that authority and discretion are used and abused, and abusive decision-making, are described making them easier to recognize and mitigate. Knowledge of current and potential ways that social power operates provides social workers tools in promoting the goals of empowerment and uncovering and enhancing clients' strengths; Finally, a public sphere within which a reflective social work practice could …

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Fear Itself: Assessing The Risks Of Transporting High-Level Nuclear Waste, Fred Carl Dilger Jan 1998

Fear Itself: Assessing The Risks Of Transporting High-Level Nuclear Waste, Fred Carl Dilger

UNLV Retrospective Theses & Dissertations

This thesis contrasts and compares two approaches to risk assessment as they apply to the problem of transporting high level radioactive waste to Yucca Mountain, NV. Risk assessment, a lineal descendant of cost-benefit analysis, is an increasingly popular tool for justifying policy or programmatic decisions that involve some potential for public harm. The study uses Frank Fischer's framework for policy analysis to examine the problem of transportation risk assessment and to propose a new process for risk assessment that has political legitimacy, rather than technical elegance, as its goal.

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Population Size Estimation From Mark-Resighting Surveys, Huawen He Jan 1998

Population Size Estimation From Mark-Resighting Surveys, Huawen He

UNLV Retrospective Theses & Dissertations

We consider the problem of estimating the size of a closed population based on the results of a certain type of marking-resighting sampling design. The design is similar to the commonly used multiple capture-recapture design, yet in some cases economically more feasible and easy to use. Sampling is done by first tagging a number of randomly selected animals with visible markers and later randomly sighting them (for instance, for large animals by visually sampling from a helicopter) and counting the number of tagged animals; In this paper, by using the above mentioned sampling scheme we present the maximum likelihood estimation …

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Instrument Development And Validation For Use In A Health Education Program, Joanna Lynn Blockey Jan 1998

Instrument Development And Validation For Use In A Health Education Program, Joanna Lynn Blockey

UNLV Retrospective Theses & Dissertations

This study was conducted to establish the validity and reliability of a dependent measure instrument developed specifically for health education programs geared to expectant mothers and their significant others who smoke; This study's instrument was distributed to 201 randomly chosen college students participating in health education, general education, educational psychology, and communication studies classes at the University of Nevada, Las Vegas; Results from this study found that the instrument has merit. The confirmatory factor analysis, which proved the instrument's reliability, isolated three different areas of study: beliefs about smoking in general; the effects of smoking on pre- and post-natal babies; …

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A Sturdy House Built On Shifting Soil: Separation Of Powers Interpretations From The Bench, Michael Justin Sibley Jan 1998

A Sturdy House Built On Shifting Soil: Separation Of Powers Interpretations From The Bench, Michael Justin Sibley

UNLV Retrospective Theses & Dissertations

This thesis explores the development of the separation of powers doctrine and its application by the United States Supreme Court. Its analysis will focus upon the six different approaches to the doctrine that the Court has employed over the past two hundred years. Moreover, it will show that these six methods of analysis; which include the textual, original intent, structural, institutional competence, historical practice, and values approaches, have often been mixed single cases; The approach that is employed in these separation of powers cases often dictates their outcome. In many of these cases, a different approach may have led to …

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The Cooling Of A Pultrusion Process Simulator, Fredericka Delores Brown Jan 1998

The Cooling Of A Pultrusion Process Simulator, Fredericka Delores Brown

UNLV Retrospective Theses & Dissertations

Experimental and numerical modeling was done to analyze the thermal processes, focusing on the cooling rates, that occurred in a simulated representation of a composite material manufacturing process. The simulation apparatus was constructed similar to that of a compression molding device to represent the thermal process of the pultrusion machine. The simulation block utilized temperature variations and compaction pressure to create small samples that represented sections from a pultruded geometry. In this study, the thermal performance of this device was analyzed utilizing a numerical model. The effect of cooling passages and their location in the simulation block was also analyzed. …

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Radionuclide Dose Assessment Of Groundwater Migrating From The Benham Events, Nts: A Solute Flux Approach, Lloyd T Desotell Jan 1998

Radionuclide Dose Assessment Of Groundwater Migrating From The Benham Events, Nts: A Solute Flux Approach, Lloyd T Desotell

UNLV Retrospective Theses & Dissertations

Radionuclide Dose Assessment of Groundwater Migrating from the Benham Event, NTS; a Solute Flux Approach presents results of a preliminary dose-based modeling study of radionuclide transport from the Benham subsurface nuclear detonation at the Nevada Test Site. This investigation utilized a radiologic source term generated from publicly available data and consists of forty-two radionuclides that may be present in sufficient quantities to pose a potential human health risk at the source. To avoid the complex near-cavity chemistry (e.g. solubility of actinides), conservative assumptions were used to estimate a hydrologic source term. By using a two-dimensional stochastic groundwater contaminant transport code, …

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Thermal Stress Analysis Of Thermally Sprayed Coatings On A Spent Nuclear Fuel Waste Package, Michael Joseph Plinski Jan 1998

Thermal Stress Analysis Of Thermally Sprayed Coatings On A Spent Nuclear Fuel Waste Package, Michael Joseph Plinski

UNLV Retrospective Theses & Dissertations

The purpose of applying a thermal sprayed coating on a spent nuclear fuel waste package is to prevent moisture contacting the spent nuclear fuel for tens of thousands of years. This thesis studies some of the thermal effects that a coated waste package may experience. Residual stress from the thermal spray process is one of these effects and in this study two modeling methods are compared. Finally, a finite element analysis of the initial emplacement of the spent nuclear fuel in the waste package is used to determine if any spalling of the coating from the waste package will occur; …

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Astronomical Image Manipulation In The Transform Domain, Biao Chen Jan 1998

Astronomical Image Manipulation In The Transform Domain, Biao Chen

UNLV Retrospective Theses & Dissertations

It is well known that images are usually stored and transmitted in the compressed form to save memory space and I/O bandwidth. Among many image compression schemes, transform coding is a widely used coding method. Traditionally, processing a compressed image requires decompression first. Following manipulations, the processed image is compressed again for storage. To reduce the computational complexity and processing time, manipulating images in the semi-compressed or transform domain is an efficient solution; Many astronomical images are compressed and stored by JPEG and HCOM-PRESS, which are based on the Discrete Cosine Transform (DCT) and the Discrete Wavelet Transform (DWT), respectively. …

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Postural Control: Visual And Cognitive Manipulations, Megan C Dailey Jan 1998

Postural Control: Visual And Cognitive Manipulations, Megan C Dailey

UNLV Retrospective Theses & Dissertations

Numerous questions exist regarding the utilization of sensory information for postural control. Past research establishes the possibility that cognitive tasks requiring visual perception may affect the processing of visual information for postural control. The purpose of this study was to investigate the effects of varying demands of visual perception associated with a concurrent cognitive task on postural control in healthy, young adults (N = 30). The postural sway of each participant was tested in six conditions, 2 (Eye Movement) x 3 (Cognitive (none, visual, auditory)) on a Kistler force platform. Significant differences were observed between the No Cognitive condition and …

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Video-Theatre And Self-Esteem, Taylor Raymond Hanes Jan 1998

Video-Theatre And Self-Esteem, Taylor Raymond Hanes

UNLV Retrospective Theses & Dissertations

"The Way I Feel About Myself" is an alternative name for the Piers-Harris Self-Concept Scale: the way "I" feel about myself also dictates today's students' perspectives. The purpose of the present study was to determine if a positive relationship could be shown to exist between the teaching methodology Video-Theatre and the self-esteem of students. The students in this study were fourth graders at a rural Southeastern elementary school. Forty-five students were studied. A class of 24 students served as the control group. The experimental group, a class of 21 students, participated in Video-Theatre. The students were a well-blended mix of …

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An Analysis Of The Black-Scholes Model For Valuing Stock Options, Amy Anderson Keyser Jan 1998

An Analysis Of The Black-Scholes Model For Valuing Stock Options, Amy Anderson Keyser

UNLV Retrospective Theses & Dissertations

This paper will discuss the Black-Scholes Method for valuing stock options. The assumptions of the model will be discussed, especially the assumption that the stock market is lognormally distributed. The volatility of stocks will be estimated and those results compared with the results given by the companies whose stocks are being used. Finally the model will be tested on actual data and the effectiveness of the model will be analyzed.

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Language Games And Computer-Aided Composition, Ryan M Moeller Jan 1998

Language Games And Computer-Aided Composition, Ryan M Moeller

UNLV Retrospective Theses & Dissertations

Wittgenstein's theory of the "language game" looks at the specific context in which language finds meaning. This theory significantly influences composition theory and practice within the problematic context of the computer-aided classroom, a much more complex and fast-paced environment than the traditional composition classroom. Students face a challenging, semester-long language game of creating a context from learning and meaning by actively participating in the rule-making processes of language. As a result, they are responsible for creating and maintaining their own language games by negotiating their ways through chatrooms (synchronous discussions), email (asynchronous discussions), virus complications, and other technological problems. Therefore, …

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The Maize From Black Dog Cave: Testing The Concept Of Races Of Maize In The American Southwest, James Jonathan Sagmiller Jan 1998

The Maize From Black Dog Cave: Testing The Concept Of Races Of Maize In The American Southwest, James Jonathan Sagmiller

UNLV Retrospective Theses & Dissertations

Maize cobs from Black Dog Cave, a Virgin Anasazi Cave site near modern Moapa, Nevada, were measured for twelve morphological characters. Plants, ears, and tassels from living maize plants grown for this study at Las Vegas, Nevada were measured and compared quantitatively to four sets of data: the maize from the cave, a mathematical synthesis of archaeological maize from sites all over the American Southwest, quantifications during living maize races of the Southwest, and statistics from isozyme studies. Comparisons of all data indicate: the Virgin Anasazi raised the flinty Onaveno variant of Basketmaker maize; maize grows differently and environmental selection …

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The Validity Of Percent Body Fat Estimates By Jackson & Pollock Skinfold Equation, Near Infrared, Bioelectrical Impedance And Body Mass Index, Jeffrey Lane Burns Jan 1998

The Validity Of Percent Body Fat Estimates By Jackson & Pollock Skinfold Equation, Near Infrared, Bioelectrical Impedance And Body Mass Index, Jeffrey Lane Burns

UNLV Retrospective Theses & Dissertations

This study compared the validity of percent fat estimates by the Jackson & Pollock sum of four skinfold equation (JPSF), bioeletrical impedance (BIA), near infrared (NIR) and body mass index (BMI) when compared to the criterion method of underwater weighing (UWW). Skinfolds were measured at four sites, the triceps, ilium, abdomen and thigh using the Harpenden skinfold caliper. The Jackson & Pollock sum of four skinfold equation was used to calculate percent body fat. Infrared interactance was determined on a Futrex 5000 measured at the biceps halfway between the axillary fold and the anticubital space. Bioelectrical impedance was determined with …

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Recreation And Gambling Behaviors Among College Students, Laurie Platz Jan 1998

Recreation And Gambling Behaviors Among College Students, Laurie Platz

UNLV Retrospective Theses & Dissertations

Motivation of student gamblers was described and compared with their motivation for other recreational activities. Students (N = 996) at the University of Nevada, Las Vegas completed self-report questionnaires including The South Oaks Gambling Screen (Lesieur and Bloom, 1987) and the Recreation Experience Preference Scales (Driver, 1983). Despite differences in statistical significance (p {dollar}<{dollar}.01), pathological gamblers (N = 111) and recreational gamblers (N = 349) shared 7 of their top 10 ranked motives for gambling. Primary motives for gambling appeared to remain stable with practical differences emerging in the rankings of their importance depending on an individual's level of gambling involvement. All students assigned statistically higher importance to their favorite other recreational activities than to their favorite gambling activities. However, recreational gamblers reported more agreement between motives for participating in their favorite gambling activities and their favorite other recreational activities.

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Electroanalysis Using Differential Pulse Methods At A Microelectrode, Enda Howard, John Cassidy, John O'Gorman Jan 1998

Electroanalysis Using Differential Pulse Methods At A Microelectrode, Enda Howard, John Cassidy, John O'Gorman

Articles

This communication characterises the differential pulse voltammetric response of ultramicroelectrodes in connection with two different models

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