Digital Commons Network^™

Extraction Chromatographic Studies Of Rutherfordium And Dubnium Homologs, Megan E. Bennett

UNLV Theses, Dissertations, Professional Papers, and Capstones

Studying the chemistry of transactinide elements does not only allow for these elements to be properly placed in the Periodic Table, but it also permits for the extrapolation of the electronic structure based upon the position of the element in the Periodic Table. In addition it enable for the assessment of the role that relativistic effects play in the chemical behavior of the heaviest elements. An improved understanding of the role of relativistic effects in chemistry of the heaviest elements allows for a better understanding of the fundamentals principles that govern the Periodic Table. In order to investigate the chemistry …

The Male Educational Leader In Utah: Gender Dynamics, Power, And Relational Leadership In A Mormon Dominant Culture, Rick Robins

UNLV Theses, Dissertations, Professional Papers, and Capstones

This qualitative study explored the impact of Mormon culture and theology on male and female school leaders that co-exist on high school administrative teams. This problematic relationship is caused by the scarcity of female administrators in Utah as they move up the leadership ladder in education. According to the Utah State Office of Education in 2006, there were 118 public high schools in the state of Utah. Out of those 118 high schools, 18 were lead by female principals. There were 141 middle schools. Of the middle schools in the state, 40 were lead by female principals. Of the 617 …

Ultrasound Imaging Of Lumbar Multifidus Immediately Following Three Physical Therapy Techniques In Asymptomatic Individuals, Victoria Byers, Steven Lim, Kathryn Rice

UNLV Theses, Dissertations, Professional Papers, and Capstones

Study Design

Randomized, blinded, cohort, within subjects design.

Background and Objective

The effects of different manual therapy (MT) techniques on lumbar multifidus (LM) thickness have been investigated in subjects with low back pain (LBP) but have not been investigated in asymptomatic subjects. The objective of this study was to examine the immediate effects of mobilization and manipulation on contraction thickness of LM in healthy individuals.

Methods and Measures

Forty-two healthy individuals participated in the study. Ultrasound imaging techniques were used to record LM thickness (L4-5 level) at rest, during an abdominal drawing in maneuver (ADIM), and during a prone upper …

Effects Of Inlet Conditions On Diffuser Outlet Performance, Zaccary A. Poots

UNLV Theses, Dissertations, Professional Papers, and Capstones

Building air distribution terminal system designers and system installers require accurate quantitative information on the performance of the installed system to achieve optimum efficiency and levels of human comfort. This requires field installation adjustment values from published ideal pressure loss, air distribution and sound generation installation performance. This study documents the air output performance of different installation configurations of six types of ceiling diffusers and compares the results to performance when installed according to ANSI/ASHRAE Standard 70-2006. A diffuser inlet supply plenum was designed for optimum flow and used to acquire a baseline set of data covering the six types …

Second-Order Conditioning In Drosophila, Christopher J. Tabone

UNLV Theses, Dissertations, Professional Papers, and Capstones

Animals possess the ability to associate neutral stimuli in their environment with both rewards and punishment. A conditioned stimulus (CS1) such as a smell or sound, can become associated with an unconditioned stimulus (US), such as a food reward, to elicit what is known as the conditioned response (CR). This type of learning is commonly referred to as classical conditioning or first-order conditioning (FOC). Second-order conditioning (SOC) is an extension of this type of association wherein a novel stimulus is introduced (CS2) and associated with a previously conditioning first-order stimulus (CS1). As a result, the organism may show an attraction …

The Relationship Of Child Maltreatment Potential And Mothers’ Satisfaction With Their Neglected Children, Kelsey M. Bradshaw

UNLV Theses, Dissertations, Professional Papers, and Capstones

Parental satisfaction refers to the extent to which parents are satisfied with their children in relation to parent-child interactions and child behavior. The relationship between parental satisfaction and child behavior problems has been demonstrated extensively in the literature. Children who exhibit increased behavior problems appear to be at increased risk of parental aggression. Maltreating parents evidence greater levels of parental dissatisfaction as compared to caregivers of children who are not maltreated. Thus, low parental satisfaction is a suspected risk-factor for child maltreatment. Previous studies have shown that parental substance abuse is also strongly related to occurrence of child maltreatment. This …

Environmental Engagement Demand Differences Within And Among Holland Academic Environments, Derek K. Lester

UNLV Theses, Dissertations, Professional Papers, and Capstones

College and university administrators have increased the use of measurements of student engagement to gauge the levels on their campuses. However, little research measures student engagement levels among different academic environments or different academic majors. Some research has been done that used Holland's theory of person/environment fit, and accompanying Hexagonal model, as a means to compare differences among academic environments. However, the validity of the assumptions that the model is based on has not been examined, nor the validity of the grouping of academic majors into environments.

The data set used for this study is the 2005 National Survey of …

Fertility Symbols In Rock Art: Cupuls And Incised Grooves In The Lower Pecos, Texas, Cara D. Connolly

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rock art at archaeological sites are often dismissed as a culturally symbolic representation that cannot be objectively or scientifically analyzed or interpreted adequately. Such dismissals are detrimental to understanding all aspects of a given culture. Although uninformed interpretations of rock art panels are counterproductive, systematic recording and the testing of different hypotheses is a valid way to begin to better understand the possible range of social functions of rock art. This research examines whether indigenous women's fertility is represented in rock art depictions, known as cupules and groove marks, in the archaeological record. Cupules are defined as a boulder or …

Engaging Non-Alumni Advisory Board Members In Hospitality Education, Judy A. Nagai

UNLV Theses, Dissertations, Professional Papers, and Capstones

Hospitality education programs within higher education institutions often rely upon members of the hospitality industry to serve as volunteer advisory board members. A common role for volunteers of an academic program advisory board is to serve as a credible link between the formal education and degree earning process to the hospitality industry, provide insight and advice on current issues and trends, assist in developing industry relationships, and share their time and resources to help promote the program (Edwards, 2008; Merrill, 2003). While volunteer advisory boards within higher education are often made up of both alumni and non-alumni, this study focused …

Sew Speak! Needlework As The Voice Of Ideology Critique In The Scarlet Letter , "A New England Nun," And The Age Of Innocence, Laura L. Powell

UNLV Theses, Dissertations, Professional Papers, and Capstones

In the Nineteenth Century, needlework, and embroidery in particular, became a signifier of feminine identity. Needlework was such a significant part of women’s lives and so integral to the construction of femininity in nineteenth-century America that both pictoral and narrative art demonstrate numerous representations of women embroidering. The sheer volume of these representations in the Nineteenth Century suggests that the practice of embroidery provides a way of speaking for women—a representation of the voice of subjectivity silenced by patriarchal ideology. Because needlework serves as a signifier of ideal femininity, it provides uniquely fruitful and previously unexplored opportunities for investigating how …

Molecular Organic Geochemistry Of The Oil And Source Rocks In Railroad Valley, Eastern Great Basin, Nevada, United States, Laode Ahdyar

UNLV Theses, Dissertations, Professional Papers, and Capstones

A comprehensive geochemical study of oils from Railroad Valley, Nevada and two candidate source rock intervals from the nearby Egan Range, was conducted in order to establish oil-oil and oil-source rock correlations. Analyses consisted of total organic carbon, Rock-Eval pyrolysis, and vitrinite reflectance for source rock samples, as well as biomarker, diamondoids, and stable carbon isotope analyses on source rock extracts and oil samples.

Total organic carbon analyses showed high organic content in the Mississippian Chainman Shale. However, outcrop samples of the Paleogene Sheep Pass Formation Member B are organically lean. Strata in both of these units are immature to …

The Size Of The Risk: An Environmental History Of The Nuclear Great Basin, Leisl Ann Carr Childers

UNLV Theses, Dissertations, Professional Papers, and Capstones

Throughout the twentieth century, Congress has managed the nation's public lands for the greater good of the country under a multiple-use construct. Land-use decisions based on serving the nation's public interest entailed federal land management agencies finding the utility of the land in order to put as much of it as possible into some kind of economic production and provide equitable access, as much as was feasible, to all the various public land users. But every federal program enacted on the nation's public lands has had an associated cost; not everyone or every environment has benefited from multiple-use public land …

To Consult Or Not To Consult? Investigating Barriers To Dysparenia Treatment-Seeking In Young Women, Robyn L. Donaldson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Little is known about mediators of treatment-seeking in dyspareunia. The general health belief literature as well as some existing qualitative data specific to dyspareunia, however, suggests a number of potentially significant barriers that may delay or prevent women from enlisting the aid of health care professionals. The aim of this study was to investigate influences on dyspareunia treatment-seeking behavior in young women, for whom the consequences of treatment avoidance are hypothesized to be the greatest. Given the lack of standardized health behavior measures relevant to intercourse pain, we constructed a measure assessing potential barriers to dyspareunia treatment-seeking. An exploratory principal …

Planning For Building-Integrated Agriculture In Las Vegas, Robert Vralsted

UNLV Theses, Dissertations, Professional Papers, and Capstones

High food prices, concern about food nutrition and safety, and an awareness of commercial farming's environmental impact have generated a renewed interest in sustainable urban agriculture. Advances in controlled environment agriculture (CEA) have made it possible to grow food virtually anywhere in a much more sustainable manner than traditional field-based agriculture. Locating and planning urban farms using retrofitted existing building stock to maximize food production and ease of distribution in Las Vegas requires consideration of multiple barriers related to geography, economics, and the built environment. Consideration of these factors in the planning process informs the design of a successful BIA …

Colonization And Decontamination Of Quagga Mussels In The Western United States: Monitoring Veligers In Lake Mead And Field Testing In The Effects Of Hot-Water Spray As A Means Of Watercraft Decontamination, Sean Robin Comeau

UNLV Theses, Dissertations, Professional Papers, and Capstones

The introduction and establishment of aquatic invasive species (AIS) is one of the top causes of global biodiversity loss and ecological change, and is also financially costly for taxpayers and agencies managing protected areas. This is especially true regarding the nationwide spread of dreissenid mussels to various bodies of freshwater. The discovery of invasive quagga mussels (Dreissena rostriformis bugensis) in Lake Mead on January 6, 2007 has changed the popular recreation area into a potential vector of the destructive AIS. This location could allow for an increased spread of these dressenid species to uninfested bodies of water in the western …

A Statistical Model For Long-Term Forecasting Of Strong Sand Dust Storms, Siqi Tan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Dust elevated into the atmosphere by dust storms has numerous environmental consequences. These include contributing to climate change; modifying local weather conditions; producing chemical and biological changes in the oceans; and affecting soil formation, surface water, groundwater quality, crop growth, and survival (Goudie and Middleton, 1992). Societal impacts include disruptions to air, road and rail traffic; interruption of radio services; the myriad effects of static-electricity generation; property damage; and health effects on humans and animals (Warner, 2004).

In this thesis, we extend the idea of empirical recurrence rate (ERR), developed by Ho (2008), to model the temporal trend of the …

Vertebrate Taxonomic Composition, Species Diversity, And Paleoecology Of Two Pliocene Mid-Latitude, Inland-Basin Fossil Assemblages: Panaca Local Fauna (Lincoln County, Nevada) And Hagerman Local Fauna (Twin Falls County, Idaho), Vicki Lynn Meyers

UNLV Theses, Dissertations, Professional Papers, and Capstones

I studied the sedimentology, species diversity, relative abundance, paleoenvironment, and paleoecology of the vertebrate fauna of the early Pliocene (Blancan Land Mammal Age) Panaca Formation of southeastern Nevada, and I compared these data with the slightly younger Hagerman fauna of south-central Idaho. The purpose of this study is to characterize the paleoecology and species diversity of mid-latitude inland basins during the Blancan Land Mammal Age, a time of climate change and immigrating taxa from Asia and South America. This study involved surface collecting and screenwashing of the Panaca Formation sediment in Meadow Valley, as well as a compilation of data …

Reading The World In The Word: The Possibilities For Literacy Instruction Framed Within Human Rights Education, Judith M. Dunkerly

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this critical ethnography was to investigate the experiences of teachers and students when literacy instruction was framed within human rights education. Informed by critical socio-cultural theory and Freirean concepts of critical literacy and praxis, this study highlights the experiences of two servant leader interns (teachers) and sixteen scholars (student) participating in human rights education sessions within the context of a CDF Freedom School. Data sources included semi-structured and informal interviews, scholar and intern artifacts including multimedia projects, and recorded classroom discussions. Data were analyzed utilizing Michel Foucault’s concept of “regime of truth” in order to examine how …

The Effect Of Acute Exercise-Induced Fatigue On Pistol Shooting Performance In Police Officers, Melissa Jean Brown

UNLV Theses, Dissertations, Professional Papers, and Capstones

Duties of police officers include apprehending suspects, which may involve foot pursuit and firing a weapon at a suspect. Previous studies in biathletes and soldiers suggest that shooting performance is compromised when fatigue is present. Purpose: To investigate the effects of exercise-induced fatigue on shooting performance in police officers. Methods: Nine police officers fired five rapid-fire shots at three targets each with a fifteen second rest period in between each trail. Officers then exercised on a cycle ergometer to 85% maximum heart rate or voluntary fatigue. The pretest shooting was repeated post-exercise. Distances of 4 shots from the center of …

Public Interest Standard Characteristics In Hybrid Digital Multicasts Of Noncommercial Educational Radio, Michele Ann Gothard

UNLV Theses, Dissertations, Professional Papers, and Capstones

Radio broadcasting implements digital multicasting in the United States with the adoption of HD Radio from iBiquity. Hybrid digital radio multicasts can upgrade either AM or FM facilities, and stations adopt the technology without loosing traditional analogue broadcasts. Broadcasting with digital technology creates additional channels of information, extending limitations of the electromagnetic spectrum. Scholarly research about hybrid digital technology considers motivations for adoption by stations but has not focused on content of existing multicasts. This study examines noncommercial educational radio multicasts for characteristics of service in the public interest.

Discourse characteristics find a mix of sounds that include both speech …

Numerical Simulations Of Accretion Disks And Extrasolar Planets, Stefan Luketic

UNLV Theses, Dissertations, Professional Papers, and Capstones

We study mass outflows from astrophysical objects. Using numerical hydrodynamical simulations, we investigate outflows from accretion disks and exoplanets. In the first part of this dissertation, we present the results of Zeus 2D hydrodynamical simulations of the disk photosphere irradiated by strong X–rays that are produced in the innermost part of the disk of an accreting black hole. As expected, the irradiation heats the photosphere and drives a thermal wind. To apply our results to the well– studied X–ray transient source GRO J1655–40, we utilized the observed mass of its black hole and the observed properties of its X–ray radiation …

Employment Selections Of Resident And Non-Resident Graduates Of Physical Therapy Programs In Underserved Western States, Trever J. Cornia, Ryan B. Dutot, Jacob T. Parsons, Kathryn D. Swart

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background and Purpose:Physical therapy (PT) is an essential component of the healthcare system in providing a comprehensive treatment plan for patients with functional limitations. The demand for physical therapy services is projected to expand in the next eight years, leading to an increased need for practicing physical therapists. The Mountain States plus Washington State (MSPWS) demonstrate the greatest shortage of therapists and are considered to be medically underserved. The purpose of this study was to determine the retention rates of resident and non-resident physical therapy graduates of public universities in the MSPWS and to determine which factors influenced their …

Prayer In Jewish Community High Schools: Generation Y Jews In An Era Of Unlimited Choices, Yonatan Yussman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this qualitative study was to examine and analyze tefilla (prayer) programs in three Jewish community high schools, as well as professional leadership practices in these schools as they related to prayer. The questions that guided this research were: (1) What does prayer education and practice look like in Jewish community high schools? (2) How is prayer education and practice perceived by key constituencies in Jewish community high schools? (3) How do educators and students in Jewish community high schools describe authentic prayer?

Site observations, interviews with students, faculty, and administration, as well as data collected from sources …

Program Evaluation: Bureau Of Reclamation, Lower Colorado Region Business Lines And Focus Areas “Water Drop” Project, Adriana Vanbuskirk, Marion Biron, Kris Kirby, Theodore Anderson

UNLV Theses, Dissertations, Professional Papers, and Capstones

This paper examines how familiar Bureau of Reclamation employees in the Lower Colorado Region are with the region’s goals and priorities and how well they understand their individual role in relationship to those goals and priorities. It also analyzes the effectiveness of the communication strategies in place to communicate the goals and priorities of the organization.

Molecular Evolution And Historical Biogeography Of New World Birds, Brian T. Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

Deciphering the patterns of how biodiversity has evolved across time and space has remained a fundamental objective for biologists for the last 200 years. Researchers are faced with the challenge of interpreting the complexity of evolutionary patterns that have been generated over the deep history of the Earth. The advancement of DNA sequencing technology has yielded a new and powerful genetic toolkit that has allowed biologists to address novel evolutionary questions. For my dissertation research, I used molecular genetics and a statistical framework to study the evolution and historical biogeography of birds distributed in North and South America. My dissertation …

Pleistocene Climate In Alaska From Stable Isotopes In An Ice Wedge, Corinne Y. Griffing

UNLV Theses, Dissertations, Professional Papers, and Capstones

The CRREL permafrost tunnel offers a unique opportunity to sample ice wedges in a climate-controlled environment, penetrating frozen silts which host massive ground ice that may record Dansgaard-Oeschger (D-O) and Heinrich Events. Ice wedges in the tunnel have been dated to approximately 36-22 ka (Hamilton et al., 1988), allowing the paleoclimate of the region to be reconstructed during MIS 3, when D-O and Heinrich events were documented in various other records. These climate cycles are rapid climate oscillations that have been recognized in records from the Arctic and subarctic, and suggest that climate can rapidly shift by 10°C over millennial …

Child Advocacy Centers And Child Sexual Abuse In Nevada, Chrystal Ruggieri

UNLV Theses, Dissertations, Professional Papers, and Capstones

Child sexual abuse has gained significant attention from the medical, legal and social research communities over the last couple decades. Developed in the 1980s, Child Advocacy Centers (CACs) have been noted as one of the leading developments in combating child sexual abuse. Child Advocacy Centers bring together multi-disciplinary teams in a child friendly environment to improve resources for abused children and their families as well as aid in prosecution. The majority of states across the country have adopted aggressive legislation and funding initiatives to aid in protecting this vulnerable population. This study analyses Nevada's position on childhood sexual abuse and …

Investigating The Effects Of A Combined Problem-Solving Strategy For Students With Learning Difficulties In Mathematics, Dustin B. Mancl

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many students, specifically those with learning difficulties in mathematics, struggle when presented with word problems to solve. With this in mind, the purpose of this research was to examine the effects of the READER Strategyon word problem performance of students with mathematics disabilities and students who are at-risk to fail in mathematics. There were two parts to this research. Part One was implemented using a single-subject design (i.e., multiple-probe across participants) and Part Two was implemented using a group design (i.e., 2 x 4 factorial design). The single-subject design included three participants identified as having mathematics disabilities. There were two …

Effects Of Classwide Self-Management Intervention On Second Grade Students’ Social Skills In Physical Education, Elian Aljadeff-Abergel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Maintaining students' on-task behavior and engagement with learning materials is difficult due to factors such as a large number of students and the increasing occurrences of disruptive behaviors in class. Students' acquisition of appropriate social skills can increase the teacher's ability to effectively teach in class and facilitate students' academic success. Self-management (SM) interventions in which students manage their own behaviors can serve as socially and ecologically-valid strategies for enhancing students' social skills in the classroom. Self-management programs have wide empirical support that demonstrates their merit for students' learning of social and academic skills. In school settings, self-management interventions were …

Gamma-Ray Burst Populations, Francisco J. Virgili

UNLV Theses, Dissertations, Professional Papers, and Capstones

Over the last fifty years the field of gamma-ray bursts has shown incredible growth, but the amassing of data has also left observers and theorists alike wondering about some of the basic questions surrounding these phenomena. Additionally, these events show remarkable individuality and extrema, ranging in redshift throughout the observable universe and over ten orders of magnitude in energy. This work focuses on analyzing groups of bursts that are different from the general trend and trying to understand whether these bursts are from different intrinsic populations and if so, what can be said about their progenitors. This is achieved through …