Digital Commons Network^™

Processes Of Disposition Development In K--5 Teachers, Deborah A. Obara

UNLV Theses, Dissertations, Professional Papers, and Capstones

Educators concur that teacher competency requires more than teaching knowledge and skills; competency requires appropriate professional dispositions. The development of professional dispositions is an expected outcome of teacher education programs. Since 2002, program accreditation has been contingent on documentation that prospective teachers have met national standards for dispositions. The body of educational research on disposition assessment has been growing. Research on disposition learning and development, however, has been impeded by the prevailing conceptualization of dispositions as fixed traits resistant to change. The present study conceptualized dispositions as malleable constructs within a theoretical framework that synthesized a cognitive model of thinking …

Zoroastrians On The Internet, A Quiet Social Movement: Ethnography Of A Virtual Community, Helen Gerth

UNLV Theses, Dissertations, Professional Papers, and Capstones

Zoroastrians today are a small but vibrant ethno-religious diaspora estimated at 130,000-258,000. They are members of the oldest monotheistic world religion originating in the Inner Asian steppes in approximately 1500 B.C. living as a religious minority in widely dispersed communities across the world. Increasingly they have turned to the Internet to discuss challenges of declining population, maintaining an ethno-religious identity, conversion, and intermarriage. The question grounding this research is how does this small ethno-religious minority maintain its boundaries and cohesion in the modern world? This study found that Zoroastrians maintain group boundaries and cohesion in the modern world, in part, …

Improving Casino Profitability Through Effective Offer Packages, Ren Zhang

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of the this study is to investigate effective marketing techniques to attract potential customers in a particular demographic group, young people aged from 21 to 34, as a way of exploring the local market. This demographic group constitutes a dynamic part of the local population and is characterized by its unique financial conditions and spending preferences. The hypothesis is that with well-designed price bundling, the casinos can realize increased revenue through increased visits from the local young population. The marketing technique used in this study is to utilize offer packages which bundle promotional items and other hotel-provided services. …

Two-Tank Indirect Thermal Storage Designs For Solar Parabolic Trough Power Plants, Joseph E. Kopp

UNLV Theses, Dissertations, Professional Papers, and Capstones

The performance of a solar thermal parabolic trough plant with thermal storage is dependent upon the arrangement of the heat exchangers that ultimately transfer energy from the sun into steam. The steam is utilized in a traditional Rankine cycle power plant. The most commercially accepted thermal storage design is an indirect two-tank molten salt storage system where molten salt interacts with the solar field heat transfer fluid (HTF) through a heat exchanger. The molten salt remains in a closed loop with the HTF and the HTF is the heat source for steam generation. An alternate indirect two tank molten salt …

Novel Techniques In Iris Recognition, David Walker

UNLV Theses, Dissertations, Professional Papers, and Capstones

Using Daugman's algorithm and comparable alternatives, we find that we are able to identify an iris with as little as less than half of the iris information available, and an equal error rate comparable with that of popular biometrics like the fingerprint and face recognition biometrics. Different experiments were done based on percentage of iris shown, the resolution of the iris, and the position of the iris covered to determine if partial iris recognition is a viable biometric. It was found after over 500,000 different iris comparisons amongst five different experiments that regardless of the model used and the resolution, …

Evaluating The Response Styles Theory Of Depression Using Descriptive Experience Sampling, Theresa A. Scott

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Response Styles Theory of Depression states that there are two main responses to depression: distraction and rumination. Though it is believed distraction helps to alleviate feelings of dysphoria, the theory suggests rumination actually prolongs and intensifies episodes of depression (Nolen-Hoeksema, 1990, 1991). Rumination is also believed to play a role in the higher rates of depression seen in women (Nolen-Hoeksema, 1990, 1991). In 1987, Nolen-Hoeksema created the Response Styles Questionnaire (RSQ) as a measure to identify those who tend to use distraction or rumination as a psychological response to feelings of sadness or depression. The goal of this study …

Mental Illness, Co-Occurring Factors And Aggression As Examined In An American Prison, Stephanie Leigh Sullivan

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study examines the relationship between several factors which have been identified in previous research as co-occurring and risk relevant to aggressive behavior. Although many factors have been addressed independently for various reasons in other studies, this study looks at the unique combination of a select few of these variables and their relationship for propensity towards aggression. The results of this study show propensity towards aggression is significant for two specific mental health issues; anxiety, and history of severe head injury. Results also indicate that co-occurring factors are prevalent in this sample and those inmates with prior mental illness are …

Patient-Focused Research: Examining The Psychotherapist As A Feedback Receiver, Michael Haderlie

UNLV Theses, Dissertations, Professional Papers, and Capstones

The provision of feedback to psychotherapists regarding patient progress has been shown to produce improved therapy outcomes. However, little is known regarding therapists' responses to feedback. The current research examined novice therapists' perceptions of feedback based on the Outcome Questionnaire-45 (OQ-45). It was hypothesized that feedback would be considered more valuable when it was negatively-valenced (i.e., indicated that patient response to therapy was worse than expected). Patients (N = 19) of 5 trainee psychotherapists completed the OQ-45 before each session. Therapists then received feedback and rated it based on several characteristics. As hypothesized, negatively-valenced feedback was rated as more valuable …

Descriptive Experience Sampling Interactive Multimedia Training Tool, Arva Bensaheb

UNLV Theses, Dissertations, Professional Papers, and Capstones

Descriptive Experience Sampling Interactive Multimedia Training Tool By Arva Bensaheb Dr. Russell T. Hurlburt, Examination Committee Chair Professor of Psychology University of Nevada Las Vegas The present study developed a multimedia training tool to teach skills necessary to recognize two phenomena identified by the Descriptive Experience Sampling method: sensory awareness and unsymbolized thinking. The training tool was developed by subjecting successive versions to critical feedback provided by focus groups. Then training provided by this new training tool was compared with the training provided by extant literary materials on the two phenomena. Results suggest that the training tool was more effective …

The Effects Of Ultrasound Transducer Velocity On Intramuscular Tissue Temperature Across A Treatment Site, Pamela Liceralde

UNLV Theses, Dissertations, Professional Papers, and Capstones

This purpose of this study was twofold: to determine whether ultrasound transducer velocity affected tissue temperature increase, and whether heating was uniform across the treatment site. Thermocouples were inserted 2.5cm below the skin surface at the center, edge of the ERA, and the edge of the treatment site that was the size of two times the soundhead. Each subject received three 10-minute treatments at each speed, letting tissue temperature return to baseline between treatments.

Repeated measures factorial ANOVA revealed no significant differences in the speed of application and no interaction between speed and location. However, the location of the thermocouples …

Effects Of Similarity Metrics On Document Clustering, Rushikesh Veni

UNLV Theses, Dissertations, Professional Papers, and Capstones

Document clustering or unsupervised document classification is an automated process of grouping documents with similar content. A typical technique uses a similarity function to compare documents. In the literature, many similarity functions such as dot product or cosine measures are proposed for the comparison operator.

For the thesis, we evaluate the effects a similarity function may have on clustering. We start by representing a document and a query, both as a vector of high-dimensional space corresponding to the keywords followed by using an appropriate distance measure in k-means to compute similarity between the document vector and the query vector to …

Characterization Of Aerobic Respiration In Great Basin Hot Springs, Caitlin N. Murphy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite a wide diversity of possible electron donors available to fuel chemolithotrophy, it has been proposed that hydrogen is the single most important electron donor in geothermal ecosystems. To directly test this hypothesis, a simple system was devised to determine whether microorganisms in hot spring water and sediment are capable of using hydrogen and other electron donors for aerobic respiration using microrespirometry. The protocol for these experiments was developed using pure cultures of Thermocrinis ruber to determine the effect of growth conditions on the rate of oxygen consumption following the addition of electron donors. For field experiments, samples were collected …

Ground Reaction Forces For Children Running In Different Shoes, Dana Forrest

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to determine whether certain ground reaction force parameters such as impact force (F1), second maximum force (F2), loading rate, stance time and average vertical ground reaction force (Fzavg) differ when 11-13 year old children run in a neutral shoe (Nike Air Pegasus+ 25) that is either a child or adult style.

Shoes were impact tested in an impact test instrument to determine any performance differences between the two shoes. Next, 10 healthy female subjects aged 12.03 ± 1.14 years with a height of 154.6 ± 4.90 cm and a mass of 46.18 ± 14.33 …

Standing In The Night, Karin Jane Millhouse

UNLV Theses, Dissertations, Professional Papers, and Capstones

Standing in the Night has been completed under the influence of phenomenology with its curious regard towards reality. Yet it makes no claims to be anything other than what it is: really, we're just making it all up as we go along.

From School To Practice: The Meaning Of Nurses' Holistic Comfort, Michal Goodwin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nurses entering the healthcare arena are likely to encounter a gap in preparation from school to practice. Despite well-intentioned transition programs, nurses struggle to keep up with the reality of demanding schedules, stressful work environments and non-nursing tasks, such as their own comfort. Holistic comfort, a well-known concept in patient care, offers an innovative approach to nursing education to sustain new nurses transitioning into practice. This phenomenological study explored how nurses who experienced holistic comfort in their schooling were able to use the same philosophical approach to transcend unavoidable difficulties early in their careers.

Newly practicing nurses from a program …

Comparing The Effectiveness Of Interactive Field, Interactive Class And Non-Interactive Class Lecture Teaching Strategies To Teach Wetland Ecology Concepts To 6th Grade Science Students, April Marie Samson

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study tested the effectiveness of interactive teaching methods on the learning of wetland ecology concepts by 6 th grade science students. 330 students from nineteen different 6 th grade science classes were used in this study. These classes were separated into four different treatment groups, each containing presentations with varying degrees of student interaction. This was done in attempt to test the effect of interactive teaching methods on attitude about the environment and knowledge regarding wetland ecology concepts, specifically, on outdoor education as a process of learning by doing. Student knowledge of wetland ecology concepts and attitudes toward the …

Biofeedback Assisted Relaxation Training Program To Decrease Test Anxiety In Nursing Students, Catherine Andrea Prato

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nursing programs have been cited as being among the most stressful undergraduate programs. Students' knowledge and skills are consistently tested and monitored, and students may fail a course or be dropped from their nursing program if scores are not above a certain standard. Anxiety reactions are common to situations perceived as threatening; however, excessive anxiety may paralyze an individual and interfere with effective learning, functioning, and testing. Numerous studies have found increased anxiety causes physiological changes including increased respirations and heart rate, and decreased peripheral skin temperature. The purpose of this study was two fold. First test anxiety was measured …

Child Neglect And Trauma: The Additive Traumatic Effects Of Neglect On Maltreated Adolescents, Adrianna Rachel Wechsler

UNLV Theses, Dissertations, Professional Papers, and Capstones

Child maltreatment affects thousands of youths in the United States and poses numerous detrimental effects to individuals, families, and the community. Neglect is the most commonly reported and least studied form of child maltreatment. All types of child maltreatment may result in negative outcomes, but the chronic and pervasive nature of child neglect poses a significant threat to child development. No studies have been published evaluating the role of child neglect in the development of Posttraumatic Stress Disorder (PTSD) and PTSD-related symptoms. This study examined whether neglect has an additive traumatic effect on maltreated youth. The first hypothesis was that …

When Did The Ancestors Of Polynesia Begin To Migrate To Polynesia? The Mtdna Evidence, David Lesniewski

UNLV Theses, Dissertations, Professional Papers, and Capstones

The timing and nature of the migration of the ancestors of the Polynesian people is debated by two competing theories. The "Express Train" and "Slow Boat" theories assert that the migration of the Proto-Polynesian people began around 6,000 years before present (BP) or around 10,000 years BP respectively. Through the use of haplogroups and specific genetic mutations a direct relationship between the Proto-Polynesians and modern Polynesians was attempted to test which of these theories was correct. The ancient skeletal remains from the island of Borneo currently housed at UNLV were used in this study as their dates fall within both …

Neurocognitive Deficits And Functional Outcome In Bipolar Disorder, Danielle T. Bello

UNLV Theses, Dissertations, Professional Papers, and Capstones

Bipolar disorder affects approximately 1% of the population. It is a severe and debilitating illness, causing serious impairment of interpersonal, occupational and social functioning. The disorder is characterized by marked mood swings as well significant neurocognitive deficits. Based on work with other psychiatric and neurological disorders, neurocognitive deficits in bipolar disorder are expected to be strong predictors of functional capacity. However, few studies have evaluated the consequences of neurocognitive deficits in this disorder. Most available studies have focused on the clinical correlates of functional outcome, such as number of hospitalizations, age of disorder onset, and severity of symptoms. While useful, …

New Yarmouth, Eastern Neck, Maryland: Resistance To Town Building From The Colonial Period To The Present, Brynn Torelli

UNLV Theses, Dissertations, Professional Papers, and Capstones

The work presented in this thesis is an attempt to shed light on the early colonial development of Maryland's Eastern Shore and its possible relationship with current settlement patterns in the region, with particular interest in Kent County. Traditional interpretations of the lack of urban development on the Eastern Shore, both in the Colonial era and the present, have tended to focus on environmental and geographical factors. This research seeks to examine this trend toward rural living in newer and broader ways by incorporating human agency and investigating the possibility that the lack of town development during the Colonial era …

X-Ray Diffraction Study Of Dysprosium Single Crystal Samples In A Diamond Anvil Cell (Dac), Ognjen Grubor-Urosevic

UNLV Theses, Dissertations, Professional Papers, and Capstones

X-ray diffraction is the basis of crystallography, the study of the structure of crystals. It uses X-rays of a wavelength on the order of the size of atoms, so it can resolve the positions of individual atoms in a crystal. Illuminating the crystal with a well-collimated X-ray beam produces X-rays diffracted in a certain direction for a specific crystal orientation. By analyzing the relative phase of the incoming and outgoing scattered X-rays, the unique arrangements of atoms can be determined and the structure of the crystal can be solved.

There is a long standing controversy regarding the crystal structures and …

Job Satisfaction Comparison Between Foreign Educated Nurses And U.S. Educated Nurses, Kari Zizzo

UNLV Theses, Dissertations, Professional Papers, and Capstones

The current nursing shortage has impacted the profession and resulted in desperate recruitment of immigrant nurses to work in the U.S. Low job satisfaction is a factor implicated for the high nurse turnover rates, which contributes to further shortages and recruitment. Satisfaction amongst all nurses has been assessed in past research to address these issues; however no research per se has compared job satisfaction of nurses who obtained their nursing education in the U.S. to nurses who obtained education in other countries. It was the purpose of this study to compare these groups to identify any differences in job satisfaction. …

In Situ Element Quantification In The Hydrothermal Diamond Anvil Cell Using Synchrotron X-Ray Fluorescence With Applications Toward Subduction Zone Processes, Steven Joseph Maglio

UNLV Theses, Dissertations, Professional Papers, and Capstones

Yttrium is used in geochemical investigations of arc volcanics and metamorphic geothermometers. The ability to use Y as a geochemical tool is predicated on an understanding of the mobility of Y during fluid-saturated conditions attending metamorphic and igneous processes. The goal of this work was to use the hydrothermal diamond anvil cell (HDAC) and synchrotron radiation X-ray fluorescence to quantify, in situ, the concentration of Y in aqueous fluids at 2-5 GPa and 650 - 800 °C; conditions likely at the oceanic lithosphere - mantle wedge interface in subduction zones. Previous studies have used modified diamond anvils which limits their …

Integrated Responses Of Crustaceans Inhabiting Estuaries To The Challenges Of Feeding And Digestion In Low Salinity, Daniel Luke Curtis

UNLV Theses, Dissertations, Professional Papers, and Capstones

Estuaries are highly productive and serve as vital habitats for numerous decapod crustacean species. However, the environmental conditions within estuaries are often highly dynamic and subject to large changes in salinity and temperature that occur on seasonal and tidal scales. Not all of the species occupying these habitats are adept in coping with changes in these environmental conditions. This dissertation describes the influence of low salinity conditions on the 1) habitat preference, 2) feeding behaviour and 3) digestive physiology of crustaceans inhabiting estuaries. I have primarily focussed on a weak osmoregulator, the Dungeness crab, Cancer magister , but have also …

Optimization Of Channel Geometry In A Proton Exchange Membrane (Pem) Fuel Cell, Jephanya Kasukurthi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Bipolar plates are the important components of the PEM fuel cell. The flow distribution inside the bipolar plate should be uniform. Non-uniform flow distribution inside the bipolar leads to poor performance of the fuel cell and wastage of expensive catalyst. A single channel PEM fuel cell is taken and electrochemical analysis is carried out on it. The results are compared with the available published experimental data obtained by other research group, and they are found to be in good agreement. A baseline design of the bipolar plate is taken and numerical analysis is carried out. The results show that the …

Evaluation Of Extraction Chromatography Resins For Rapid Actinide Analysis, Julie Marisa Gostic

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this work, physical and chemical parameters associated with extraction chromatography separation procedures were investigated for rapid actinide analysis. A vacuum box system was designed in-house and was characterized in terms of flow rate reproducibility, matrix effects on flow rate for sequential elution, and actinide separation efficiency using different types of resin (TEVA, DGA and TRU). Results indicated that the columnar kinetics of the resins were sufficiently rapid to run high purity samples through the unit over a wide range of flow rates for all resin types. Single matrix interferences at a metal ion ratio of 1:10 6 relative to …

Gods R Us, Alivelu Nagamani

UNLV Theses, Dissertations, Professional Papers, and Capstones

Around Grecian orchards. On Trojan battlefields. In Siva's realm. Inside Hanuman's heart. Of gods, demons, and others who love us, hate us, serve us, interfere with us. Of humans larger than life. When gods were not in hiding. About a space not reached via explanations. Poems in Gods R Us come from Greek/Roman and Indic myths, they retell myths, comment on myths, and refer to myths - they could not have been without myths. Distillation and attentiveness create the time needed to be one in the spirit of the poem. I range from reverential to playful.

Effects Of Plant Uptake And Micro-Topography On Chloride Transport In Arid Soils, Wenming Nie

UNLV Theses, Dissertations, Professional Papers, and Capstones

Chloride concentration profiles to depths of 1 m were evaluated on a young alluvial fan in Eldorado Valley, NV. It was found that chloride beneath plant canopies were 11 to 222 times higher than adjacent (1 - 2 m away) bare soil locations. Two-dimensional numerical simulations using HYDRUS 2D/3D model were used to further explore the impact of plants on chloride transport. The simulation results indicated that lateral flow driven by root uptake concentrated chloride toward root zones, leading to the accumulation of chloride under plant canopies. Results also suggest that locally micro-topography can have a substantial impact on chloride …

"The Varied Carols I Hear": The Music Of The New Deal In The West, Peter L. Gough

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Federal Music Project and subsequent WPA Music Programs served as components of President Franklin D. Roosevelt's "New Deal" efforts to combat the economic devastation precipitated by the Great Depression. Operating during the years 1936 to 1943, these programs that engaged unemployed musicians mirrored similar efforts of the Federal Theatre, Art and Writers' Projects. Though the Federal Music Project proved to be the largest of the cultural programs in terms of both employment and attendance, to date it has received the least attention from scholars. This dissertation demonstrates that, given the societal landscape of 1930s America, a regional perspective is …