Digital Commons Network^™

Morphometric Assessment Of The Internal Auditory Canal For Sex Determination In Subadults Using Cone Beam Computed Tomography (Cbct), Saoly Benson

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study reports on the use of three methods for sex determination in subadults using the petrous portion of the temporal bone. The purpose of this study was to validate and refine two previously published methods of sex determination for the internal auditory canal as well as to develop a novel method. The sample was comprised of 276 cone beam computed tomography (CBCT) scans of a population of subadults age 6-24 (165 females, 111 males) divided into 5 age groups for analysis: Group 1 (age 6-10), Group 2 (age 11-13), Group 3 (age 14-16), Group 4 (age 17-19), and Group …

A Competency Model For Catering And Event Professionals Using A Modified Delphi Technique, Donnell G. Bayot

UNLV Theses, Dissertations, Professional Papers, and Capstones

As the market for face-to-face meetings and events has grown to one of the largest private sector industries, so has the market for catering, which is the largest budget line item for a meeting or event. Clients have become more demanding and at the same time more price-conscious. This has caused catering professionals and meeting and event planners' job responsibilities to change. Caterers and planners now have more crossover responsibilities and over more varied functional areas than ever before. In response, the National Association for Catering and Events (NACE), as the oldest and largest catering association in the world, formally …

A Narrative Study Of Male Accompanying Partners: Adaptation To A Nontraditional Role In Dyadic Partnerships, Donald J. Bernard

UNLV Theses, Dissertations, Professional Papers, and Capstones

Although the traditional conceptual paradigm of an accompanying spouse, sometimes referred to in social science literature as a trailing partner, emanates from a predominantly female perspective, an emerging trend involves men functioning in that role. With America's changing workforce due to the increased labor force participation of women, a postmodern family structure has emerged as the role of men as breadwinners-in-chief in the traditional nuclear family has been steadily eroded. The academic literature on the traditional pattern of wives trailing their husbands to new geographical for better employment and income is voluminous. However, studies on the emergence of males accompanying …

Listening To The Ranks: Perceptions Of The U.S. Air Force Occupational Health And Safety Training, Melissa Jo Breunig

UNLV Theses, Dissertations, Professional Papers, and Capstones

Occupational health and safety hazards are abundant in military environments. Due to the hazardous occupational settings, injuries remain a public health concern in the United States military. Public health plays a critical role in injury reduction by addressing the need for comprehensive safety education training, and more specifically, exposure related injuries. A secondary data analysis was completed using Communication Theory as the overarching framework to analyze 13 qualitative interviews conducted with Airmen to gain their perceptions of the occupational health and safety training at Nellis and Creech Air Force Base (AFB). Pedagogy and training content were the two main themes …

Understanding Brand Authenticity In Specialized Communities: An Interpretive Qualitative Study Of The Brit Iron Rebels Las Vegas Clan, Sullivan Charles

UNLV Theses, Dissertations, Professional Papers, and Capstones

Postmodern society is marked by a condition where traditional identity markers have degenerated in value. Without the spatial or temporal connection provided by traditional identity markers, individuals look to brands perceived to be authentic to aide in identity construction. Paradoxically, individualized identities need the interpretive support of other likeminded individuals in specialized communities to give legitimacy to constructed identities. These specialized communities often focus around a lifestyle or a brand. This research employed interpretive qualitative methodology to understand authenticity. Semistructured depth interviews were conducted with members of the Brit Iron Rebels Las Vegas Clan to understand the authenticity of Triumph …

Social Network Analysis (Sna) Of Clark County, Nevada Tuberculosis (Tb) Case And Contact Investigation Data To Determine Pediatric Risk Factors For Disease Transmission, Darin Michael Cozatt

UNLV Theses, Dissertations, Professional Papers, and Capstones

Within the spectrum of childhood (infancy, early childhood, middle childhood, and adolescence), TB is a priority disease, and preventive care is recommended by the American Academy of Pediatrics (AAP)/Bright Futures initiative (AAP, 2008). Within the early childhood stage (15 months to 4 years), TB is classified as "HR2" (high risk 2), behind lead poisoning, which is "HR1" (AAP, 2008), the highest risk within this age range. Within the middle childhood stage (5 to 10 years), TB becomes an HR1. TB is preventable, and targeted screening is the best prevention method. The AAP/Bright Futures initiative further specifies the risk based on …

Oppositional And Anxiety Behavior Profiles In A Clinical Sample Of Youth With Selective Mutism, Rachele Diliberto

UNLV Theses, Dissertations, Professional Papers, and Capstones

Children with selective mutism often present as a very heterogeneous population, with both anxious (APA, 2000; 2013; Kristensen 2000; Manassis et al., 2007; Steinhausen & Juzi, 1996; Yeganeh et al., 2003) and oppositional symptoms (APA, 2013; Andersson & Thomsen, 1998; Kolvin & Fundudis, 1981; Krohn, Weckstein, & Wright, 1992). This study sought to identify anxiety and oppositional behavior profiles in a clinical sample of children with selective mutism. Also, this study sought to determine both discriminant and concurrent validity for these profiles and examine their association with family expressiveness, conflict and control. Participants (n=57) included youth receiving treatment at the …

Evaluation Of Phb Mid-Street Crossing System In Las Vegas, Nevada - Pedestrian Perspectives, Anna Eapen

UNLV Theses, Dissertations, Professional Papers, and Capstones

As the U.S. population ages and as more people choose to walk, it is critical to improve pedestrian safety. One of the best ways to encourage both pedestrians and vehicle drivers to behave safer is to make use of the most effective engineering traffic control systems. One such new technology is the Pedestrian Hybrid Beacon System (PHB), formerly known as the High-intensity Activated crosswalk (HAWK), a pedestrian-activated traffic-warning device. It features immediate activation of traffic warning lights from a dark state, a pedestrian countdown timer, and shorter pedestrian crossing times and traffic stoppage times compared to a traditional midblock traffic …

Mitigation Of Moving Shocks In An Expanding Duct, Veraun Chipman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Inviscid flow theory governs the bulk motion of a gas at some distance away from the walls (i.e. outside the boundary layer). That is to say, there are no viscous forces in the bulk flow, which is modeled using the Euler equations. The Euler equations are simply the Navier-Stokes equations with zero viscosity terms. An ideal inviscid fluid, when brought into contact with a surface or wall, would naturally slip right past it since the fluid has no viscosity. In real life, however, a thin boundary layer forms between the wall or surface and the bulk flow. Shock wave boundary …

Keeping In Touch: Exchange As An Adaptive Strategy In Southern Nevada, Timothy Joshua Ferguson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Archaeologists have always wondered about the extent of vessel movement in the American Southwest. Identifying vessel movement allows for the study of social interactions across a region and the role of ceramics in the adaptive processes of agriculturalists living in marginal, highly variable environments. In many instances, exchange may act as a way to reduce the risk of resource shortfalls by creating social ties in other areas. This research investigated the changing risk reduction strategies of households in the lowland Virgin region of southern Nevada by using geochemical methods to trace the exchange of locally produced pottery. It was hypothesized …

Novel Deployment Of Elpasolites As A Dual Neutron / Gamma-Ray Directional Detector, Amber Lynn Guckes

UNLV Theses, Dissertations, Professional Papers, and Capstones

At a time when upholding national security has never been more important, there exists a need for the advancement of radiation detection technologies. Neutron and photon detectors are essential to fulfilling mission areas including detection and localization of missing, stolen or smuggled radiological or nuclear materials, quantification of the effects of a radiological or nuclear event, and supporting nonproliferation efforts. The aim of this study was to evaluate a new radiation detector based on the scintillation elpasolite compound Cs2LiYCl6:Ce (CLYC) for simultaneous measurements of neutron and photon flux and the localization of radiation sources. Previous studies performed on the CLYC …

Simulation, And Overload And Stability Analysis Of Continuous Time Sigma Delta Modulator, Kyung Kang

UNLV Theses, Dissertations, Professional Papers, and Capstones

The ever increasing demand for faster and more powerful digital applications requires high speed, high resolution ADCs. Currently, sigma delta modulators ADCs are extensively used in broadband telecommunication systems because they are an effective solution for high data-rate wireless communication systems that require low power consumption, high speed, high resolution, and large signal bandwidths.

Because mixed-signal integrated circuits such as Continuous Time sigma delta modulators contain both analog and digital circuits, mixed signal circuits are not as simple to model and simulate as all discrete or all analog systems. In this dissertation, the delta transform is used to simulate CT …

Modeling And Analysis Of Pedestrian Flows, Romesh Khaddar

UNLV Theses, Dissertations, Professional Papers, and Capstones

According to the Traveler Opinion and Perception Survey of 2005, about 107.4 million Americans regularly use walking as a mode of transport during their commute, which amounts for 51% of the total American population. In 2009, 4092 pedestrian fatalities were reported nationwide, out of 59,000 pedestrian crashes. This amounts for 12% of the fatalities in the total traffic accidents recorded, and shows an over-representation of pedestrians incidents. Thus, it is imperative to understand the causes behind such statistics, and conduct a comprehensive research on pedestrian walking behavior and their interaction with surroundings.

A lot of researches on pedestrian flows have …

Spatial Analysis Of Chipped Stone At The Cypro-Ppnb Site Of Krittou Marottou Ais Giorkis: A Gis-Assisted Study, Levi Lowell Keach

UNLV Theses, Dissertations, Professional Papers, and Capstones

Krittou Marottou Ais Giorkis (`Ais Giorkis) is an Aceramic Neolithic site, occupied approximately 9,500 cal B.P., and located in the western foothills of the Troodos Mountains on the Mediterranean island of Cyprus. This thesis is an intra-site spatial analysis of the chipped stone assemblage recovered between 1997 and 2013 from the site using Geographic Information Systems (GIS) technology. Previous work on the assemblage from 1997 through 2004 had attempted spatial analysis using traditional statistical methods and found no patterning (O'Horo 2008). Using the expanded database and GIS this thesis identifies multiple spatial patterns in the assemblage with implications on the …

Songs By Hsiao Tyzen: The Interaction Between His Music And Taiwan, Pei-Ning Ku

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this document is to understand Taiwanese composer Hsiao Tyzen's artistic persona through analysis of the textual and musical characteristics of his songs. This document is comprised of: 1) an historical overview of Taiwan, 2) a history of Taiwanese vocal music, 3) a description of Hsiao Tyzen's life and career, 4) an introduction to Taiwanese diction, 5) an examination and analysis of musical components (melody, rhythm, accompaniment and form) of four of Tyzen's songs, and 6) a conclusion based upon sociological factors, historical influences and musical devices to define what constitutes the stylistic characteristics of the songs of …

The Lived Experience Of Nursing Students During Their Psychiatric Nursing Education: Does It Influence View Of Psychiatric Nursing As A Career Choice?, Lisa Mcconlogue

UNLV Theses, Dissertations, Professional Papers, and Capstones

Using a van Manen phenomenological approach combined with a Colaizzi step-wise data analysis procedure, this study seeks to describe the lived experience of recent nursing school graduates during their psychiatric didactic and clinical education and how the experience influenced their view of psychiatric nursing as a specialty choice.

Inclusion criteria for participants were registered nurses (RN) who graduated from their entry level nursing program within the last three years; graduated from a United States RN program; and are currently working as an RN in an inpatient setting. Two groups of participants were selected; one group of nurses who chose psychiatric …

The Presentation Of Childhood Parental Divorce In Adulthood: A Retrospective Phenomenological Study, Sheala Catherine Morrison

UNLV Theses, Dissertations, Professional Papers, and Capstones

There has been a wealth of research aimed at developing an understanding of the way in which the experience of divorce impacts children. However, adult children of divorce have been widely underrepresented in this literature, much of which is outdated being at least ten years old. With shifting societal attitudes and the transformation of the family system since the 1990's it is crucial that the research is updated in order to stay up on the way children and families are impacted in today's society. The purpose of this study was to hear directly from adults who experienced their parents' divorce …

Global Climate Change: The Political Impact Of Global Warming On Developing Countries. The Case Studies Of Egypt And Oman, Eugene Thomas O'Neal

UNLV Theses, Dissertations, Professional Papers, and Capstones

The discourse of climate change has become important in the field of political science, as well as in the policy-making community. Climate change has become a political phenomenon that has and will greatly impact political stability regionally and globally. Using the ecological security theory as a framework, I explored the relationship between climate change and political stability in developing countries.

This study utilizes both qualitative and quantitative analyses to investigate the relationship between climate change and its effects on political volatility in developing countries. Using regression models, the author examined all non-OECD countries (140 countries) and their relationship to political …

New Early Miocene 40ar/39ar Ages For Nakwai, Northwest Kenya, Africa, And Paleontological Analysis Of Meroehyrax Kyongoi Dentition, Dawn Elena Reynoso

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nakwai is a fossiliferous region in the Turkana Basin of northwestern Kenya. Until recently the only ages for the Nakwai formation were based on biostratigraphic correlation with Losodok; a late Oligocene site located to the north of Nakwai. The new 40Ar/39Ar ages in this study range from 23 Ma to 15 Ma and constrain the upper portions of the Nakwai section to the early Miocene. These ages make it the only securely dated fossil locality in the region that represents the earliest Miocene; all of the other early Miocene fossil localities date back to ~20 Ma or younger. The time …

Subalklaine Volcanism In The Eastern Basin And Range Province: Examples From The Miocene Mccullough Range Volcanic Field And The Pliocene To Holocene Black Rock Desert Volcanic Field, Racheal Leighann Johnsen

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation is composed of three papers that apply geologic mapping, whole rock geochemical and isotopic analysis, and mineral chemistry to describe two large, long-lived (~6 million years), and compositionally heterogeneous volcanic fields and posit sources of the rock types present in each. These fields are the McCullough Range in southern Nevada, which was a locus of volcanic activity from ~19 - 12 Ma and the Black Rock Desert volcanic field in west-central Utah, which began forming at ~6 Ma and is still active today, with the most recent eruption occurring ~720 years ago.

Chapter Two is composed of a …

Corrugated Ware Function And Use As Identity Markers At The Harris Site, Danielle Romero

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis examines the function of corrugated vessels and addresses pithouse and group identity through the differences in technological and design style at the Harris site (LA 1867), a Late Pithouse period (550-1000 CE) Mimbres Mogollon pithouse village. Corrugated wares have long been defined as utilitarian cooking vessels. The goal of this research is to shed more light on corrugated wares as a ceramic type that served a variety of functions outside of cooking, including a presence in ritual spheres. This research also explores the use of technological and design styles of corrugated wares to discuss individual and group identity. …

Hemispheric Asymmetry In The Perception Of Musical Pitch Structure, Matthew Adam Rosenthal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Both the left and right hemispheres contribute to the perception of pitch structure

in music. Music researchers have attempted to explain the observed asymmetries in the perception of musical pitch structure by characterizing the dominant processing style of each hemisphere. However, no existing characterizations have been able to account for all of the empirical findings. To better explain existing empirical findings, this dissertation characterizes the left hemisphere as dominant in temporal pitch processing (i.e. with respect to the sequential ordering of pitches) and the right hemisphere as dominant in non-temporal pitch processing (i.e. without respect to the sequential ordering of …

Remote Sensing Based On Hyperspectral Data Analysis, Ershad Sharifahmadian

UNLV Theses, Dissertations, Professional Papers, and Capstones

In remote sensing, accurate identification of far objects, especially concealed objects is difficult. In this study, to improve object detection from a distance, the hyperspecral imaging and wideband technology are employed with the emphasis on wideband radar. As the wideband data includes a broad range of frequencies, it can reveal information about both the surface of the object and its content. Two main contributions are made in this study:

1) Developing concept of return loss for target detection: Unlike typical radar detection methods which uses radar cross section to detect an object, it is possible to enhance the process of …

Designing A Biomimetic Testing Platform For Actuators In A Series-Elastic Co-Contraction System, Ryan Tyler Schroeder

UNLV Theses, Dissertations, Professional Papers, and Capstones

Actuators determine the performance of robotic systems at the most intimate of levels. As a result, much work has been done to assess the performance of different actuator systems. However, biomimetics has not previously been utilized as a pretext for tuning a series elastic actuator system with the purpose of designing an empirical testing platform. Thus, an artificial muscle tendon system has been developed in order to assess the performance of two distinct actuator types: (1) direct current electromagnetic motors and (2) ultrasonic rotary piezoelectric motors. Because the design of the system takes advantage of biomimetic operating principles such as …

Client Selected Music Based Effects On Marital And Couples Therapy, Kevin Matthew Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study was designed to examine the interaction of music-based interventions in the therapeutic process of Martial and Couples Therapy. The use of pre-recorded music was found to be under researched within the literature and created a void within the knowledge that clinicians have about how music might enhance effectiveness of treatment. The inclusion of music in this process is not currently known, which led to this study being conducted. Through a phenomenological lens, the awareness and understanding of how clients react and experience pre-recorded music during the therapeutic process, while still having a selection of options to preserve autonomy, …

Influence Of Social Media In Stages Of Democratization, Ira David Sternberg

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Internet and social media have become a pervasive part of our global environment over the last few decades, utilized primarily for commerce, communication, and entertainment. The last several years, however, have seen an increase in the application of social media in political discourse and activities, primarily in developed democracies and autocracies. Does that mean social media can influence democratic transition and consolidation in the 21st century? Are the examples of the Green Movement in 2009 and the Arab Spring in 2011 a validation of social media in service to democracy, or is social media also a tool for surveillance …

Analysis Of Lithic Assemblages From Virgin Branch Puebloan Sites On The Shivwits Plateau, Thomas Carl Wambach

UNLV Theses, Dissertations, Professional Papers, and Capstones

Flaked stone technology, as with any utilitarian technology, is studied by archaeologists for a number of reasons. Often lithics are studied to understand the activities of a prehistoric group. Everything from the final product to the waste material can, when recovered in suitable amounts, reflect the conscious decisions of its creator. Understanding this helps to embed all stages of stone tool (lithic) use into aspects of human behavior and in understanding the organization of technology.

The Virgin Branch Puebloans are the westernmost sub-branch of the Ancestral Puebloan culture of the American Southwest. While some of their expanse has been studied …

The Untold History Of Nevada's Shield Statute, Matthew Travis Ward

UNLV Theses, Dissertations, Professional Papers, and Capstones

The history of American journalism is replete with anecdotes about news reporters enduring jail and other penalties to protect the identities of confidential sources of information. Since as early as the American Revolution journalists have often found themselves at odds with established authority. In the political cauldron of the late 1960s and early 1970s, U.S. government intrusion into the news gathering process was widespread. The notion the First Amendment protected journalists from revealing sources was invalidated by the Supreme Court's 1972 decision in Branzburg v. Hayes. Many states throughout the nation reacted by codifying a reporter's privilege. Nevada did so …

Application Of The Transtheoretical Model: Assessing Exercise Behavior In African Americans In A Church-Based Setting, Robin Marie White

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sedentary behavior rates are higher among African-American men and women than in other American races and ethnicities, placing them at greater risk for chronic illness. Routine physical activity reduces the risk of chronic health problems such as: (a) overweight and obesity, (b) type 2 diabetes, (c) hypertension, (d) coronary artery disease, (e) stroke, (f) congestive heart failure, and (g) cancers. Assessment of African-Americans' exercise attitudes in a church-based setting may provide information with which to develop effective interventions to improve physical activity. This descriptive, cross-sectional study used components of the Transtheoretical Model (TTM) to assess whether any associations exist between …

Chinese Outbound Tourists Food Consumption In The U.S.: An Extension Of The Theory Of Planned Behavior, Kaiyang Wu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Although Chinese outbound tourists made enormous economic contribution to the U.S. restaurant industry, they seem to have the tendency to consume Chinese cuisine solely during their international trips. This study applies structural equation modeling (SEM) to evaluate different behavioral beliefs' impact on the intentions of Chinese outbound tourist unfamiliar ethnic food consumption in the U.S. Additionally, this research combines the Theory of Planned Behavior (TPB) and food neophobia, a food-related personality trait to better explain Chinese outbound tourists' food rejection behavior in the U.S.

Results of this study showed safety concern, acceptance of table manners, perceived communication gap and food …