Digital Commons Network^™

The Effects Of Habitat Manipulations On Utah Prairie Dogs (Cynomys Parvidens) And Their Habitat On The Awapa Plateau Recovery Area In South-Central Utah, Gretchen Elizabeth Caudill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah prairie dogs have been listed, in some capacity, under the Endangered Species Act since 1972. The lack of suitable habitat, particularly cool season grass cover,
has been identified as the primary factor impeding species recovery. Due to reproduction costs, Utah prairie dogs require a large quantity of cool season grasses. Lack of recovery has also been attributed to poor juvenile survival. Increased resources have been shown to increase weights, which would increase survival through the winter.

Beneficial habitat management techniques for Utah prairie dogs have yet to be determined for the Awapa Plateau recovery area. Utah prairie dogs require …

Farmer, Miner, Ranger, Writer: Interpreting Class And Work In The Writing Of Wendell Berry And Edward Abbey, Tyler Austin Nickl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study compares some of the essays and novels of two well known, environmental writers: Wendell Berry and Edward Abbey. Usually, these writers are discussed for their environmental politics and representations of nature, but this study examines the ways in which each of these writers discusses class and manual labor. This aspect of Abbey’s and Berry’s works has not yet received the attention it deserves. With this focus in mind, I make the following conclusions: 1) An author’s view of society (as expressed by their opinions of class and socioeconomic status) necessarily affects their view of nature. 2) Berry’s occupational …

Root Uptake Of Organic Contaminants Into Plants: Species Differences, Naho Orita

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Xenobiotic organic contaminants are widely found in the environment, including soils, sediments, surface waters, wastewater streams, and even in drinking water. Food chain contamination resulting from the uptake of these contaminants by plants is a concern. Although the uptake of a variety of xenobiotic organic contaminants by plants has been reported but the differences between plant species are not fully understood. The emphasis of this thesis research is to further investigate the unique root to shoot transfer ability of “gold rush” zucchini that has been reported repeatedly in recent years.

A pressure chamber technique was used to measure transpiration stream …

"Worlds Without End": The Cosmological Theodicy Of Brigham Young, James Chase Kirkham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis proposes an analysis of the teachings of Brigham Young, second President of the Church of Jesus Christ of Latter-day Saints. The study focuses on Young’s more striking doctrine—namely, the eternal nature of matter, the capability of humans to live after death where they would eternally gain knowledge, a universe governed by a race of exalted human beings called gods, and the potential for humans, upon reaching the status of gods and goddesses, to create planets and populate them with their children.

This study uses a three-fold method to understand why some of Young’s teachings were so remarkable. First, …

Continental-Scale Characterization Of Molecular Variation In Quaking Aspen, Colin M. Callahan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Quaking aspen has the largest natural distribution of any tree native to North America, ranging from Alaska through the breadth of Canada and south to mid-Mexico. Recent studies suggest a general decline of aspen throughout much of the range since at least the mid-20th century, though these findings remain inconclusive. Regardless, factors such as climate change, periods of drought, soil nutrient deficiencies, pathogens, insects, and encroachment by other tree species all pose risks to the health and maintenance of aspen across the continent. This situation is exemplified in the western United States where climate change is forecasted to have an …

Experimental Studies Of Vertical Mixing In An Open Channel Raceway For Algae Biofuel Production, Ram Sudheer Voleti

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The USU BioEnergy Center has been successful in developing algae feedstocks for renewable biofuels and bioproducts. The concept is to utilize and maximize algae feedstocks for liquid transportation fuels, biomass for burning and digestion, and high value co-products. It is theorized that increasing the mixing in open and closed algal production systems improves the productivity of the algae culture. A raceway cultivation system was chosen to examine the phenomena of mixing. Vertical mixing will provide more uniform exposure to sunlight for all of the algae in the raceway. The main focus of this research was to increase vertical mixing. Delta …

Value Of Information In Design Of Groundwater Quality Monitoring Network Under Uncertainty, Abdelhaleem I. Khader

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Due to variations in rainfall and limited surface water resources, groundwater is considered the main source for freshwater in many places throughout the word. But this precious resource is being jeopardized by pollution from human activities such as: industry, agriculture, and untreated wastewater, which highlight the need for efficient groundwater resources management. To be efficient, groundwater resources management requires efficient access to reliable information that can be acquired through monitoring. On the other hand, the complicated nature of groundwater aquifers and the uncertainties in the data and the models used to understand the aquifer and its behavior require more powerful …

Late Adolescents’ Perceptions Of A Digital Generation Gap And Perceived Parent-Child Relations, J. Mitch Vaterlaus

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to determine if late adolescents (18-25 year olds) perceived differences between their own knowledge about interactive technology and what they thought their parents knew about the same technology. Secondly, the study sought to understand how differences in these perceived technology were related to adolescent perceptions about their interactions with their parents. The parent-child relationship characteristics of interest in this study were parent-child quality time, parent-child conflict, and parents’ knowledge of their childrens’ behaviors.

Late adolescents did perceive generational differences in technology knowledge in the areas of video chat, cell phones, general social networking, …

Genetic Characterization Of Fine-Leaved Festuca Valesiaca Germplasm And Evaluation Of Their Relationship To The Festuca Ovina Complex, Yingmei Ma

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fine-leaved Festuca valesiaca has stress tolerance. However, its agronomic performance in the western United States and its genetic relationship to species of the Festuca ovina complex has not been investigated. Also, natural hybridization makes them difficult to identify. Given the species' potentials, our project was designed to identify Festuca valesiaca accessions that possess high biomass and seed yield and to examine their relatedness with the Festuca ovina complex.

The Festuca valesiaca accessions examined produced many small seeds. Seed production was correlated with the total biomass, plant height, and plant vigor. The Festuca valesiaca accessions examined were shorter than the control …

The Use Of Life History Collage To Explore Learning Related To The Enactment Of Social Consciousness In Female Nonprofit Leaders, Susan R. Seymour

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This paper advances a novel qualitative research approach using life history collage. Rather that utilizing an interview protocol to enter into a participant’s story, life history collage invites participants to create a longitudinal collage of significant life events around a theme such as learning, relationships, or identity. The longitudinal nature of the collage situates and prioritizes significant life events with images, words, and elements chosen to represent events and circumstances. Each image within the collage contains rich and nuanced storylines that invite exploration by both researcher and participant. Meanings and subtexts are revealed as participants describe their collage and the …

Unintentional Home Injury Risks Among The Elderly In Southern Nevada, Michelle Echauz Ching

UNLV Theses, Dissertations, Professional Papers, and Capstones

The elderly population (65 years of age and older) is one of the fastest growing populations in the US. A major public health concern involving the elderly population is unintentional injuries in the home. Since elderly adults typically spend the majority of their time in the home, minimizing unintentional home injury hazards is crucial for this population. The Nevada Healthy Homes Partnership (NHHP) program is a grant funded effort that helps to improve the quality and availability of safe and healthy homes in Nevada. Therefore, the purpose of this study is to determine the effectiveness of the NHHP program interventions …

Effect Of Gingival Margin Design On Retention Of Thermoformed Orthodontic Aligners, Daniel P. Cowley

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: The aim of this study was evaluate the effect of gingival margin design (scalloped vs. straight cut at gingival zenith vs. straight cut 2mm above gingival zenith) on the retention of thermoformed aligners. Retention of aligners is a critical requirement for efficient tooth movement.

Methods: Two thermoform aligner materials were used, Invisacryl A and Invisacryl C, in 0.040 mil (1mm) thickness. Six aligner designs were fabricated for each of the two aligner materials (12 total aligner designs). Aligner designs are scalloped, straight cut at gingival zenith (0mm), and straight cut 2mm above gingival zenith on a model with attachments. …

Effects Of Moisture Augmentation Of Municipal Solid Waste Through Addition Of Food Waste Or Wastewater Treatment Biosolids On Bio-Gas Formation For Power Generation, Jared Michael Gore

UNLV Theses, Dissertations, Professional Papers, and Capstones

An investigation into the effect of moisture augmentation by manipulation of food waste proportion or wastewater treatment plant biosolids proportion was undertaken to determine the effects on production of methane and other biogases from municipal solid waste (MSW). Laboratory microcosm experiments were performed to determine the effect of various proportions of influent waste streams on the production of biogas. Results indicated that moisture augmentation through the addition of food waste to MSW increases the overall bio-gas and hydrogen gas formed during fermentation. Moisture augmentation through addition of wastewater treatment bio-solids lead to inconclusive results. Addition of food waste to MSW …

Utilization Of A Metabolic Syndrome Index In Evaluating The Life In Balance Lifestyle Intervention For Prevention Of Type 2 Diabetes Among Urban American Indians And Alaska Natives, Hongbin Jin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: A myriad of diabetes prevention programs modeled on the Diabetes Prevention Program (DPP) are carried out worldwide to fight against the current diabetes pandemic. The percentage of weight reduction is a widely used indicator to evaluate diabetes prevention programs. However, weight change alone may not fully reflect the efficacy of lifestyle intervention. A metabolic syndrome index is a promising novel scale for evaluation of diabetes prevention programs because it is a systematic, comprehensive, and stable indicator that reflects the metabolic risk reduction for diabetes and its complications at multiple levels and dimensions.

Methods: A total of 22 overweight and …

Do Toddlers Exhibit Same-Sex Preferences For Adult Facial Stimuli?, Andrea Jane Kayl

UNLV Theses, Dissertations, Professional Papers, and Capstones

During the first year, infants exhibit visual preferences for female relative to male faces (Quinn, Yahr, Kuhn, Slater, & Pascalis, 2002). These visual preferences may reflect an adaptive behavior resulting from infants' greater experience with females during social interactions, particularly caregiving (McArthur & Baron, 1983; Rennels & Davis, 2008). As children learn they belong to a particular sex during toddlerhood, they become more active seekers of social knowledge and may begin to seek out members of that sex as models for determining appropriate activities and behaviors (Baldwin & Moses, 1996; Martin, Ruble, & Szkrybalo, 2002). The purpose of this investigation …

Label Use And Mixed Race Asian Americans: Discourses, Performances, And Boundaries, Ellen Macdonald

UNLV Theses, Dissertations, Professional Papers, and Capstones

A person's identity is not fixed or stable, rather it changes over time and even from moment to moment (Nagel 1994). Throughout an individual's life he or she constantly cites discourses that relate specific appearances, actions, and behaviors to certain labeled social categories and those discourses make an individual intelligible as an acknowledged type of person (Butler 1990). The self, or identity, that someone presents at any point in time is comprised of the different types of information, both verbal and nonverbal, that the person provides to his audience (Goffman 1959). Labels are one verbal source of information that can …

Construct And Criterion Validity Of The Rey Auditory Verbal Learning Test-Spanish Version In Adults With Traumatic Brain Injury, Cristobal Neblina

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Rey Auditory Verbal Learning Test (RAVLT) is among the most commonly used English-language neuropsychological tests of verbal learning and memory. Previous research supports the validity and clinical utility of adaptations of the RAVLT into many diverse languages. In the United States, Hispanics represent the largest and fastest-growing ethnic minority group. As the Hispanic populace continues to grow, so does the need for empirically validated Spanish-language neuropsychological measures. In 2002, a Spanish adaptation of the RAVLT was developed in Puerto Rico (Acevedo-Vargas, 2002). However, validation studies have not been undertaken with clinical samples, and little is known regarding its psychometric …

Modeling Of Cellular Automata And Agent-Based Complex Systems, Sara Pallekonda

UNLV Theses, Dissertations, Professional Papers, and Capstones

The term 'complex systems' may sound terrifying whenever you come across it as it depicts an overall collective structure which indeed can live up to its name; but when you comprehend the system at its fundamental level by stripping to its simpler multiple- interacting individual parts, the insights it provides may be used to describe and understand different problems ranging from atomic particles to the economics of societies and evolution. The simple laws can be used to simulate the behaviors of disparate complex systems.

In this thesis, a brief study is done emulating few such complex systems through programming techniques …

Cpu Scheduling For Power/Energy Management On Heterogeneous Multicore Processors, Rajesh Patel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Power and energy have become increasingly important concerns in the design and implementation of today's multicore/manycore chips. Many methods have been proposed to reduce a microprocessor's power usage and associated heat dissipation, including scaling a core's operating frequency. However, these techniques do not consider the dynamic performance characteristics of an executing process at runtime, the execution characteristics of the entire task to which this process belongs, the process's priority, the process's cache miss/cache reference ratio, the number of context switches and CPU migrations generated by the process, nor the system load. Also, many of the techniques that employ dynamic frequency …

Orientalism And Media Representations Of Iran In The Usa, Ashutosh Mishra

Boise State University Theses and Dissertations

This thesis aims to understand the phenomenon called Orientalism and reviews how Edward Said elucidates this subject. Its key argument is that certain forms of representation, including those through mass media, can and often do consist of efforts to represent reality in a subtle manner, which may distort the picture to the disadvantage of one group, or set of persons, or even states. The efforts at such representation succeed on account of an existing power differential as well as a body of texts having already established what "knowledge" is, what truth is about a subject, without any countervailing capacity or …

A Stochastic Parameter Regression Approach For Time-Varying Relationship Between Gold And Silver Prices, Birsen Canan-Mcglone

Boise State University Theses and Dissertations

In this thesis, we studied the gold and silver relationship using stochastic-parameter regression models. We formulated their time-varying relationship as a state-space model and used the Kalman filter algorithm to estimate the stochastic regression parameters for gold and silver prices. The data set used in this thesis covers 31 years using the London fix prices between January 1969 and December 2000. The start date was selected as the first full year silver prices were included in the London fix prices. Our stochastic parameter regression model explained well the time-varying relationship between gold and silver prices. As a special case of …

Exogenous Alpha-Synuclein Induces Cell Death Related Proteins In C6 Oligodendrocyte-Like Cells Corresponding To Protein Expression Observed In Multiple System Atrophy, Derrick Samuel Hilton

Dissertations

Multiple System Atrophy (MSA) consists of three disorders; Autonomic Dysfunction, Cerebellar Ataxia, and Parkinsonism. In MSA, the protein Alpha-Synuclein (SNCA) appears in the central nervous system as misfolded protein aggregates primarily in oligodendrocytes. This dissertation reports the results from studies examining the effect of exogenous SNCA has on a cell model: C6 oligodendrocyte-like cells. Treated cells were evaluated using western blot and DNA microarray. In addition the expression of proteins was evaluated using immunocytochemistry in MSA patient tissue.

C6 cells were shown to take up SNCA when added to the media. SNCA also underwent a truncation when taken up by …

What Psychotherapists Have To Teach Us About Childhood Developmental Trauma: The Roles Of Attachment Orientation And Coping Strategy, Rebecca Klott

Dissertations

Psychotherapists have been found to have higher rates of childhood developmental trauma when compared to non-clinicians, yet they do not report more distress. The current study added to the literature regarding the experiences of psychotherapists and explored a theoretical model integrating attachment and coping as mediators for the relationship between childhood developmental trauma and psychological distress among psychotherapists.

A total of 130 masters' level psychologists participated in this study. These participants were asked to complete the following measures: The Child Abuse and Trauma Scale (Sanders& Becker-Lausen, 1995), the Ways of Coping-Revised (Folkman & Lazarus, 1985; Folkman, Lazarus, Denkel-Schetter, DeLongis, & …

Predictors Of Counselor Self-Efficacy Among Master's Level Counselor Trainees: Impact Of Cohort Versus Non-Cohort Educational Programs, Regina Lynn Meyer

Dissertations

Self-efficacy, a central component of Bandura's social cognitive theory (SCT), is an important construct in the realm of therapist development and has been associated with client outcome. Researchers have found that some of the strongest predictors of counselor self-efficacy are level of experience, level of training, state anxiety, and trait anxiety. Missing from this body of literature, however, is an understanding of how the educational format of training (i.e., cohort versus non-cohort) impacts counselor self-efficacy. Because cohort membership has been associated with professional confidence and self-esteem, it was hypothesized that educational format would contribute significant variance to counselor self-efficacy scores. …

Regulation Of Expression Of Enterohemolysin Toxin By The Global Repressor Hns And Characterization Of A New Class Of Protein Produced By Shiga Toxin-Producing Escherichia Coli, Miles T. Rogers

Dissertations

Shiga toxin-producing Escherichia coli (STEC) are worldwide pathogens causing an estimated 200,000 infections per year in the United States. Infections with STEC sometimes progress to kidney failure ending in death. Two studies presented below describe a novel virulence factor and mechanisms required for pathogenesis of STEC seropathotype 091 :H21.

First the novel protein, YghJ, was identified and found to be conserved amongst extraintestinal and diarrheal seropathotypes of E. coli with similar proteins carried by pathogens such as Vibrio cholerae. When the yghJ gene was disrupted creating a YghJ null mutant, the defect resulted in a significant growth deficiency in …

Analysis Of The Effect Of Feeding Regimen On Gh/Igf Axis In Channel Catfish (Ictalurus Punctatus), Samantha Puckett

Biological and Agricultural Engineering Undergraduate Honors Theses

Channel catfish (Ictalurus punctatus) are the most widely farmed aquatic animal in the United States. Assessing the effect of feeding regimens on their overall growth requires grow-out trials and a subsequent inefficient use of time and money. The growth hormone (GH)/insulin-like growth factor-1 (IGF-1) axis regulates growth based upon environmental factors such as feed intake in many teleost fish species. In order to increase the efficiency of aquaculture, the components of the GH/IGF-1 axis might be used as endocrine biomarkers to evaluate instantaneous growth rate. The goal of this study was to better understand the effects of feeding regimen on …

Understanding The Success And Failure Of Oyster Populations: Periodicities Of Perkinsus Marinus, And Oyster Recruitment, Mortality, And Size, Thomas M. Soniat, John M. Klinck, Eric N. Powell, Eileen E. Hofmann

CCPO Publications

Ten-year time series (1992 to 2002) of salinity, Dermo disease, and size-class structure and mortality measured for an eastern oyster (Crassostrea virginica) population at a reef in Bay Tambour, Terrebonne Parish, LA, were analyzed using wavelet techniques to determine dominant frequencies and correlations. Along the Gulf Coast of the United States, Dermo disease (caused by Perkinsus marinus) responds to the El Nino-Southern Oscillation (ENSO) climate signal through its response to salinity. During the La Nina portion of ENSO, decreased rainfall leads to an increase in salinity, which triggers a rise in Dermo disease prevalence and intensity, producing increased oyster mortality. …

Discovering The Light Bulb Tunicate, James F. Reinhardt Phd, Margaret (Peg) A. Van_Patten (Editor) Ms.

Wrack Lines

An article by a former UCONN marine sciences graduate student about a new invasive tunicate in Long Island Sound, the light bulb tunicate.

Improving The Scalability Of Parallel N-Body Applications With An Event-Driven Constraint-Based Execution Model, Chirag Dekate, Matthew Anderson, Maciej Brodowicz, Hartmut Kaiser, Bryce Adelstein-Lelbach, Thomas Sterling

Faculty Publications

The scalability and efficiency of graph applications are significantly constrained by conventional systems and their supporting programming models. Technology trends such as multicore, manycore, and heterogeneous system architectures are introducing further challenges and possibilities for emerging application domains such as graph applications. This paper explores the parallel execution of graphs that are generated using the Barnes-Hut algorithm to exemplify dynamic workloads. The workloads are expressed using the semantics of an exascale computing execution model called ParalleX. For comparison, results using conventional execution model semantics are also presented. We find improved load balancing during runtime and automatic parallelism discovery by using …

A Clinicopathologic Study Of Ki-67 Proliferation Index In Colorectal Carcinoma, Nadya Y. Ahmed, Ava T. Ismail, Tayeb S. Kareem

Saudi Medical Journal

OBJECTIVE: To investigate Ki-67 immunoexpressions in colorectal cancer and analyze possible correlations with variable clinicopathological prognostic factors. METHODS: A cross-sectional study of tissue sections from 50 formalin-fixed and paraffin-embedded tumor specimens were examined at the Histopathology Laboratory of Rezgary Teaching Hospital in Erbil, Iraq between January 2010 and July 2011. Ki-67 labeling index is calculated immunohistochemically using the monoclonal antibody MIB-1, and the standard streptavidin-biotin immunoperoxidase method. The clinicopathologic and prognostic features were statistically analyzed. RESULTS: Over-expression of Ki-67 proliferation protein was found in 31 (62%) cases. Statistical analyses revealed a significant relation between Ki-67 proliferation index and histologic type …