Digital Commons Network^™

Integrating, Developing, And Testing Methods To Generate More Cohesive Approaches To Biogeographic Inference, Mallory Elizabeth Eckstut

UNLV Theses, Dissertations, Professional Papers, and Capstones

As a fundamental component of the developing discipline of conservation biogeography, broadscale analyses of biotic assembly and disassembly across multiple temporal and spatial scales provide an enhanced understanding of how geologic transformations and climate oscillations have shaped extant patterns of biodiversity. As with any scientific field, there are limitations in the case of biogeographic historical reconstructions. Historical reconstructions are only as robust as the theoretical underpinnings of the methods of reconstruction (including data collection, quality, analysis, and interpretation). Nevertheless, historical reconstructions of species distributions can help inform our understanding of how species respond to environmental change.

My dissertation takes a …

From Daimon To Demon: The Evolution Of The Demon From Antiquity To Early Christianity, Hailey Marie Fuller

UNLV Theses, Dissertations, Professional Papers, and Capstones

One of the most fascinating entities of religious thought is the demon, which is still pervasive in both religious and popular culture today. The demon is something that is present not just in various religious texts, but is also a staple of the modern horror film. The question at hand in this thesis is whether or not the demon was always considered to be synonymous with evil. The demon itself has existed in religious culture and magic practice since antiquity, but most scholars tend to either ignore the entity, or conflate it with ghosts or minor gods. This thesis traces …

The Presence Of Methicillin Resistant Staphylococcus Aureus (Mrsa) On Environmental Surfaces In Healthcare Facilities Pre- And Post-Cleaning, Aaron Thomas Hunt

UNLV Theses, Dissertations, Professional Papers, and Capstones

The emergence of antibiotic resistant bacteria is a serious public health issue affecting millions of people. Methicillin-resistant Staphylococcus aureus(MRSA) is a leading cause of healthcare acquired infections today. Research has shown that patients infected or colonized with MRSA shed the bacteria into the environment, where the bacteria can survive for long periods of time and become potential sources of infection. Currently, infection prevention efforts focus on active surveillance, hand hygiene, personal protective equipment use and antimicrobial stewardship, with less attention given to environmental cleaning. Nevertheless, environmental cleaning is essential to remove infectious agents from environmental surfaces and prevent transmission. The …

The Effects Of Arch Taping On Shock Attenuation During Landing, Shun Jinnouchi

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to investigate the effects of two different arch taping techniques on shock attenuation during landing. Each subject (n=12, age 25.5 ± 3.37 years, height 1.73 ± 0.04 m, mass 82.06 ± 16.23) was instrumented with accelerometers at the leg and forehead (sample rate = 1000 Hz). Subjects performed landings from a 30 cm box under three taping conditions: no tape, Low Dye, and Weave. For each condition, subjects completed 5 landing trials. Rest was provided between each trial and order of conditions was counterbalanced. During each landing, accelerations were recorded at 1000 Hz for …

Communication Artifacts And Interaction Evaluation For Requirements Engineering, Miloslava Plachkinova

UNLV Theses, Dissertations, Professional Papers, and Capstones

This paper aims to answer an important question regarding the development of new information systems (IS): "What is the predominant factor for the selection of communication artifacts for requirements engineering (RE)?". Many researchers have focused on the RE and communication as separate disciplines, but little or no research addressed the RE communication issues. These problems are important because they often lead to misunderstanding and misinterpretation of the gathered requirements. We develop expectations about the RE communication process based on prior literature from both disciplines and we test them through several case studies. Our methodology consists of analysis of six case …

Muting The Masses: Effects Of The Spiral Of Silence In The College Newsroom, Blaire Ritter

UNLV Theses, Dissertations, Professional Papers, and Capstones

This paper explores whether or not Elisabeth Noelle-Neumann's theory, the spiral of silence, is an accurate theoretical lens to examine the issues of censorship and conflict in the student broadcast newsroom. Using data collected from classroom observations and student interviews, levels of involuntary and voluntary censorship and editorial control were examined to see if they played a role in classroom dynamic and editorial decisions. Each instance was looked at to see if it fit five criteria; a threat of isolation by peers or community, a fear of this threat, a willingness to speak out by the majority, a quasi-statistical sense …

The Role Of Oswrky71 And Its Interacting Proteins In Seed Germination And Early Growth Of Cereal Grains, Margaret Ja Shin

UNLV Theses, Dissertations, Professional Papers, and Capstones

During seed germination and early seedling growth, complex molecular and physiological events occur in rice (Oryza sativa) and other cereal grains. As the seed transitions to vegetative tissue, it responds to both favorable and unfavorable environmental conditions and is vulnerable to attack by predation and disease. Although seeds are relatively small and tender in size, extensive and sophisticated molecular networks enables the immobile seed to grow, survive and adapt in its environment. One of the networks I am interested in is in the crosstalk between the gibberellin (GA) and abscisic acid (ABA) signaling pathways. These pathways are interesting because they …

Dispersal Ecology Of Desert Mosses Along Gradients Of Elevation, Wildfire Disturbance And Local Niche, Robert Joseph Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

Much of the variation in plant communities can be explained by the dispersal of individuals across landscapes, an ecological process that contributes to clinal variation, post-disturbance recovery and habitat occupancy. The role of dispersal is of particular concern for Mojave Desert plant communities that may not be able to tolerate recent departures from historical fire regimes. The aim of this thesis was to infer how dispersal is reflected by patterns of diversity in disturbed and undisturbed bryophyte communities in the Spring Mountains of southern Nevada. Chapter 2 presents an examination of sub-surface bryophyte communities (propagule "soil-banks") along a 1400 m …

Effects Of Cervical Spine Manipulation On Balance And Joint Proprioception In Asymptomatic Individuals: Plausibility And Pilot Study, Kimberly Drayer, Michael Kauwe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Balance issues are prevalent in all ages of the population and can lead to many debilitating secondary impairments. There are various methods for treating balance problems, one of which is cervical spine manipulation (CSM). It seems to be biologically plausible that CSM would be an effective intervention, as it elicits effects in the same systems that are impaired in people with balance issues: vestibular, visual, and somatosensory.

Objective: The aim of this study is to investigate the immediate differences in balance and proprioception following a CSM in asymptomatic subjects.

Design: An experimental, cross-over study design was used

Methods: …

Reliability And Validity Of The Ne1 Wound Assessment Tool (Wat), Stephanie Coon, Faustina Tran, Melinda Vicencio

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background and Purpose: Current literature indicates a lack of reliability and validity of existing pressure ulcer (PrU) staging systems. This prompted the development of the N.E. One Can Stage (NEOCS). Recently this tool was modified and renamed, the NE1 Wound Assessment Tool (NE1 WAT). The purpose of this study is to test the reliability and validity of the NE1 WAT.

Subjects:

A sample of convenience of nine physical therapists (PTs) and 11 nurses (RNs) with PrU staging as part of their routine work duties were included in this study.

Methods:

A written exam was administered and consisted of assessment questions …

Comparison Of Study/Article Characteristics And Methodological Quality Of International Nurse Workplace Violence Research Published Before And After The Joint Commission Sentinel Event Alert On Disruptive Behaviors, Terressa Margarette Stowell Love

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: The majority of new nurses experience workplace violence from other nurses. The purpose of this study was to compare study/research characteristics and methodological quality of international nurse workplace violence research published before and after the 2008 release of the U.S. The Joint Commission (TJC) sentinel event alert on disruptive behaviors.

Methods: Thirty-nine quantitative nurse workplace violence research articles published between 2001 and 2012 were assessed and divided into two groups: articles published (a) before the 2008 TJC sentinel event alert or the same year, i.e., 2001-2008 (BTJC) and (b) after the 2008 TJC sentinel event alert, i.e., 2009-2012 (ATJC). …

School Nurses' Recognition, Attitudes, And Educational Needs Regarding The Care Of Children With School Refusal Behavior, Heather Strasser

UNLV Theses, Dissertations, Professional Papers, and Capstones

School refusal behavior can prevent a child from attending school or staying in class for a full day of instruction. School nurses are often one of the first professionals in the school with the opportunity to interact with these children, recognize school refusal behavior and its debilitating impact, and positively intervene to assist these children to stay in school. Few studies have examined school nurse recognition and attitudes regarding school refusal behavior. The purpose of this study was to assess school nurses' recognition of school refusal behavior, their attitudes regarding the nursing care of children with school refusal behavior, and …

A Comparison Of Nursing Service Demand In Title 1 Schools And Non-Title 1 Schools, Karen Ray Stratford

UNLV Theses, Dissertations, Professional Papers, and Capstones

Children from low-income families are known to struggle academically, but lack of health services may also impact their education. School nurses must identify and manage health problems in the school-age child to improve academic success. Unfortunately, the school nurse-to-student ratio may limit the amount of time nurses can give to the recognition of health problems and appropriate follow-up. The Elementary and Secondary Education Act of 1965 provides Title 1 funding to schools whose enrollment includes at least 40% of low-income families. These federal funds are intended to be used to bridge the achievement gap between low-income students and other students. …

Educational Experiences Of Emancipated Foster Youth: An Exploratory Study, Cynthia Joyce Stunkard

UNLV Theses, Dissertations, Professional Papers, and Capstones

The data obtained in this qualitative study focused on the educational experiences of youth formerly in foster care after graduation from high school from the viewpoint of the youth. Data were gathered from interviews from 10 participants. Themes included: (a) How do youth emancipated from foster care perceive their educational experiences? (b) What could teachers have done differently to assist the foster youth when he/she first arrived in the classroom or when he/she was moving to another placement? (c) What did teacher do to help the foster youth feel welcomed and part of the classroom community?

Interviews were conducted and …

The Evaluation Of Water Storage In Death Valley Using Grace Satellite Data, Maile Sweigart

UNLV Theses, Dissertations, Professional Papers, and Capstones

As drought conditions spread across the United States, concerns over water supplies, water use, and water management policies are growing and possible contributing environmental factors are continually being scrutinized. This thesis examines Death Valley as an analog for Southern Nevada and utilizes NASA EOS data, combined with ancillary climate data, to assess the effect of decadal climate variability on groundwater storage in the Death Valley area. Historical climate data, combined with satellite imagery observations, were compiled and calculated for analyses. Conclusions derived from statistical analyses infer trends between GRACE (Gravity Recovery and Climate Experiment) satellite data and fluctuating levels of …

Congressional Preferences And The Advancement Of American Nuclear Waste Policy, Rhoel Gonzales Ternate

UNLV Theses, Dissertations, Professional Papers, and Capstones

The problem of nuclear waste disposal has existed since the time of the Manhattan Project in World War II. Although there exist a number of technological hurdles, the main cause that has consistently plagued a solution to nuclear waste has been the politics behind it. This thesis attempts to add to the political literature behind nuclear waste disposal by examining the nuclear waste disposal preferences of members of the United States House and Senate. It then compares and contrasts those preferences with a report by President Obama's Blue Ribbon Commission on America's Nuclear Future. The hope was to determine if …

African American Teachers And State Licensing Examinations In Metropolitan Atlanta: A Case Study, Michael Leroy Taylor

UNLV Theses, Dissertations, Professional Papers, and Capstones

The 2001 No Child Left Behind (NCLB) Act legislation has had a profound effect on teacher rolls, especially African-American teachers. More than any other racial or ethnic group, African-American teachers disproportionately fail state teacher licensure examinations. This results in removing them from the classroom, while simultaneously preventing new teachers from entering it. The problem shows no signs of relenting under the current mandates, so as the diversity of the nation's study body continues to increase, the diversity of the teaching staff continues to shrink. This combined, multi-case study addressed the unexplained reduction in the numbers of African-American teachers due to …

Oxidative Stress For An Acute Bout Of Bikram Yoga In Healthy, Trained Adults, Kimberly Anne Trocio

UNLV Theses, Dissertations, Professional Papers, and Capstones

BACKGROUND:Generation of free radicals resulting in oxidative damage has been linked to cellular damage, aging, and human disease. Many studies have reported that physical exercise can contribute to oxidative stress. Further, exercise in a hyperthermic environment can promote additional oxidative stress. It is important to consider that practices in yoga may be beneficial in reducing oxidative stress according to some studies. The compound effects of exercise and hyperthermic exposure are experienced in the practice of Bikram yoga, the original "hot" yoga. Because Bikram yoga and other hot exercise classes are an increasingly growing fitness trend, it is necessary to investigate …

Dissolution Rates Of Amorphous Al- And Fe-Phosphates And Their Relevance To Phosphate Mobility On Mars, Valerie Tu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Phosphate is an essential element for life on Earth, and therefore if life exists or ever existed on Mars it may have required phosphate. Amorphous Al- and Fe-phosphates rapidly precipitate from acidic solutions and amorphous Al-phosphates likely control phosphate concentrations in some natural waters on Earth. Amorphous phases may be even more important on Mars than on Earth, and amorphous phosphates are therefore likely important in the phosphate cycle on Mars. Despite this importance, however, few dissolution rates exist for amorphous Al- and Fe- phosphates. In this study, dissolution rates of amorphous Al- and Fe-phosphates were measured in flow-through reactors …

Effect Of Dehydration On Concomitant Measures Of Cognitive Function And Balance, Stephanie Marie Watson

UNLV Theses, Dissertations, Professional Papers, and Capstones

During activities of daily living, there are demands placed on the body both cognitively and physically. These demands are multiplied when performing an athletic endeavor. Many studies have demonstrated the negative impact dehydration has on cognitive and muscle functions, independently. The purpose of this study is to investigate the effect of dehydration on central nervous system and peripheral nervous system fatigue as expressed through concomitant factors of cognitive function and balance. Subjects were to consist of 20 participates aged 18-35 years old who reported running a minimum of 45 minutes per exercise bout at least 3 times per week. The …

The Impact Of Airport Service Quality Dimension On Overall Airport Experience And Impression, Redha Widarsyah

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research examines the relationship between seven airport service dimensions (Access, Services and Facilities, Dining, Shopping, Service Personnel and Security, Environment, and Immigration and Customs) and overall passenger perceptions of service quality. The study used convenience sampling collecting data from a total of 304 travelers who were passengers at four major international airports in the West Coast region of United States - Las Vegas McCarran International, Los Angeles International, San Francisco International, and Seattle-Tacoma International. The data was collected online through Qualtrics with a self-administered questionnaire and it was analyzed using multiple linear regression.

Airport access, environment, dining, and immigration …

Evaluating Shared Governance For Nursing Excellence, Evette Michelle Wilson

UNLV Theses, Dissertations, Professional Papers, and Capstones

The national challenges of nursing shortages, decreased staffing levels, and increased patient acuities have contributed to nurse's increased workload and job dissatisfaction. Nurses have become frustrated with the professional practice environment. The inability to make decisions about issues that affect their nursing practice and the care provided to their patients results in nurses leaving the work environment in search of higher job satisfaction. Employers are becoming more creative in their strategies to improve the work environment and retain nurses within their organizations. Healthcare leaders have implemented management strategies such as shared governance models. These models focus on providing a satisfying …

In What Array That They They Were In And Participating Godlike Food, Thomas Jackson Wills

UNLV Theses, Dissertations, Professional Papers, and Capstones

I am submitting two manuscripts for my creative dissertation, In What Array That They Were In and Participating Godlike Food. The former is a sequence of odes followed by a brief epic, followed by a cycle of verse dramas, with an ode epilogue. The latter is a book-length excerpt from an epic poem/crime novel/Menippean satire/television show/Dada collage/historical document/vatic investigation that comes in 20 page sections that are supposed to approximate the 42 minutes of an average crime show.

Fate And Transport Of Fourteen Pharmaceuticals And Personal Care Products In An Irrigated Soil Profile, Lena Wright

UNLV Theses, Dissertations, Professional Papers, and Capstones

Use of pharmaceuticals and personal care products (PPCPs) is on the rise and unfortunately, a large percentage passes through the human body. These compounds then find their way into the wastewater stream and into treatment facilities. Only a fraction of these compounds are removed from the stream prior to discharge. An environmentally acceptable alternative to discharging recycled water to rivers, lakes and other bodies of water is to use the water for irrigation of large areas of turfgrass. These PPCPs, of which some may have high mobilities in irrigated soil plant systems, may potentially impact groundwater resources. To determine the …

Simulated Annealing Approach To Flow Shop Scheduling, Sadhana Yellanki

UNLV Theses, Dissertations, Professional Papers, and Capstones

Flow Shop Scheduling refers to the process of allotting various jobs to the machines given, such that every job starts to process on a machine n only after it has finished processing on machine n-1, with each job having n operations to be performed one per machine. To find a schedule that leads to the optimal utilization of resources, expects the schedule to finish in a minimum span of time, and also satisfy the optimality criterion set for the related scheduling problem is NP-Hard, if n > 2. In this thesis, we have developed an algorithm adopting a heuristic called Simulated …

Social Media Strategy For The Hank Greenspun School Of Journalism And Media Studies, Irene Williams

UNLV Theses, Dissertations, Professional Papers, and Capstones

Within the past 10 years, communication online has evolved tremendously toward social media. This rapid change has been difficult for higher education institutions (HEI) to adapt to, leaving this important area underexplored. This strategic social media plan was developed to improve internal and external communication for the Hank Greenspun School of Journalism and Media Studies (JMS). By initiating social media platforms, relationships are cultivated with present and future students on Facebook and Twitter. This strategic social media plan develops and maintains Facebook and Twitter pages for JMS and interprets social media site visitation data. These data provide information on users, …

An Empirically-Supported Model Of Posttraumatic Stress Disorder In Maltreated Youth, Adrianna Wechsler

UNLV Theses, Dissertations, Professional Papers, and Capstones

Posttraumatic stress disorder in maltreated youth is a young and burgeoning field. Lemos-Miller and Kearney (2006) were among the first to propose and test a theoretically and empirically-based model of PTSD in maltreated youth. The present study replicated and evaluated the Lemos-Miller and Kearney model within a larger and more diverse sample of maltreated adolescents. First, the Lemos-Miller and Kearney model was tested via structural equation modeling (SEM). Second, the model was evaluated across age, gender, and ethnicity. Third, trauma history, family environment (i.e., cohesion and conflict), dissociation, and trauma-related cognitions were evaluated as potential mediating variables within the model. …

Discontinuous Galerkin Finite Element Methods For Maxwell's Equations In Dispersive And Metamaterials Media, Jiajia Waters

UNLV Theses, Dissertations, Professional Papers, and Capstones

Discontinuous Galerkin Finite Element Method (DG-FEM) has been further developed in this dissertation. We give a complete proof of stability and error estimate for the DG-FEM combined with Runge Kutta which is commonly used in different fields. The proved error estimate matches those numerical results seen in technical papers. Numerical simulations of metamaterials play a very important role in the design of invisibility cloak, and sub-wavelength imaging. We propose a leap-frog discontinuous Galerkin Finite Element Method to solve the time-dependent Maxwell's equations in metamaterials. The stability and error estimate are proved for this scheme. The proposed algorithm is implemented and …

The Importance Of Explicitly Mapping Instructional Analogies In Science Education, Loretta Asay

UNLV Theses, Dissertations, Professional Papers, and Capstones

Analogies are ubiquitous during instruction in science classrooms, yet research about the effectiveness of using analogies has produced mixed results. An aspect seldom studied is a model of instruction when using analogies. The few existing models for instruction with analogies have not often been examined quantitatively. The Teaching With Analogies (TWA) model (Glynn, 1991) is one of the models frequently cited in the variety of research about analogies. The TWA model outlines steps for instruction, including the step of explicitly mapping the features of the source to the target. An experimental study was conducted to examine the effects of explicitly …

Investigation Of Peak Load Reduction Strategies In Residential Buildings In Cooling Dominated Climates, Fady Atallah

UNLV Theses, Dissertations, Professional Papers, and Capstones

This investigation of peak load reduction strategies in residential buildings contributes to the global international efforts in reducing energy consumption and is related directly to energy efficiency in residential and commercial buildings. Work reported here involves computer aided building energy simulation of energy efficient and non-energy efficient residential homes coupled with empirical energy consumption data gathered from monitoring an array of energy efficient residential homes. The latter have been implemented for peak load reduction strategies. In addition non-energy efficient residential homes have been monitored to compare performance to the energy efficient homes. This study demonstrates the crucial importance of energy …