Digital Commons Network^™

Being Outside Learning About Science Is Amazing: A Mixed Methods Study, Michelle L. Weibel

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study used a convergent parallel mixed methods design to examine teachers' environmental attitudes and concerns about an outdoor educational field trip. Converging both quantitative data (Environmental Attitudes Scale and teacher demographics) and qualitative data (Open-Ended Statements of Concern and interviews) facilitated interpretation. Research has shown that adults' attitudes toward the environment strongly influence children's attitudes regarding the environment. Science teachers' attitudes toward nature and attitudes toward children's field experiences influence the number and types of field trips teachers take. Measuring teacher attitudes is a way to assess teacher beliefs.

The one day outdoor field trip had significant outcomes for …

The Role Of Metrical Structure In Tonal Knowledge Acquisition, Matthew Rosenthal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Experienced listeners possess a working knowledge of pitch structure in Western music, such as scale, key, harmony, and tonality, which develops gradually throughout childhood. It is commonly assumed that tonal representations are acquired through exposure to the statistics of music, but few studies have investigated potential learning mechanisms directly. In Western tonal music, tonally stable pitches not only have a higher overall frequency of occurrence, but they may occur more frequently at strong than weak metrical positions, providing two potential avenues for tonal learning. Two experiments employed an artificial grammar learning paradigm to examine tonal learning mechanisms. During a familiarization …

Adolphe Nourrit, Gilbert Duprez, And The High C: The Influences Of Operatic Plots, Culture, Language, Theater Design, And Growth Of Orchestral Forces On The Development Of The Operatic Tenor Vocal Production, Micheal Lee Smith Jr.

UNLV Theses, Dissertations, Professional Papers, and Capstones

The operatic tenor voice has evolved from a variety of influences. This document identifies four influences involved in the development of the operatic tenor voice and describes their impact on performance practices including the chest voice high C (C5). Modern tenors’ performance practices originate in the nineteenth century ascendance of an Italian singing technique. This particular singing technique achieved popularity when Gilbert Duprez sang the role of Arnold in Rossini’s Guillaume Tell with a do di petto (i.e. from-the-chest) production of sound rather than the mix of falsetto and head voice that was traditional at the time. The role of …

Evaluation Of The Pilot Program, Pediatric Early Warning Sentinel Surveillance Program (Pewss), And Its Efficacy In Monitoring Pediatric Illness In Clark County, Nevada, Michelle Lee Lutman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The influenza outbreak that occurred during 2009 stimulated the formation of several surveillance programs throughout the country. The majority monitor only influenza; however, there are several other circulating respiratory pathogens, especially within the pediatric community. These other respiratory pathogens cause a variety of illnesses, such as bronchitis, pneumonia, croup, etc. Prior research has provided the medical community with valuable information about respiratory illnesses, especially those which afflict pediatric patients. Areas of knowledge including seasonality, demographics, signs and symptoms, prevention measures, and pathogenicity, have been greatly expanded over the years. This information has been of tremendous help to the medical community …

Impact Of Home Hospital Program On Empowerment And Professional Practice Behaviors, Marcille Jo Jorgenson

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to evaluate the impact of a Home Hospital Clinical Placement program on professional behaviors of nursing staff within the Home Hospital and professional behaviors of baccalaureate nursing students enrolled in the Home Hospital Clinical Placement program. The study used a conceptual model developed and tested by Manojlovich (2003).

The study was a non-experimental, cross-sectional design to compare selected attributes between students enrolled in a Home Hospital Clinical Placement and students enrolled in a traditional clinical placement and between registered nurses with high levels of teaching interaction with home hospital students and registered nurses with …

Gingival Crevicular Fluid (Gcf) Levels Of Interleukin-6 (Il-6), Soluble Glycoprotein 130 (Sgp130), And Soluble Interleukin-6 Receptor (Sil-6r) During Orthodontic Tooth Movement, Mathue Gene Faulkner

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Orthodontic tooth movement requires the precise coordination of a multitude of biological factors in order for proper bone remodeling to occur. Cytokines, such as Interleukin-6 (IL-6), play a critical role in the communication necessary for both bone resorption and bone apposition. IL-6 reacts with receptor proteins, such as soluble IL-6 receptor (sIL-6R), on target cells in order to transmit signals important to both osteoclast and osteoblast activities. Soluble glycoprotein 130 (sgp130), on the other hand, acts as a natural inhibitor to IL-6 activity. The purpose of this investigation was to evaluate the levels of IL-6, sIL-6R, and sgp130 …

Association Between Childhood Demographics And Blood Lead Screening---Nevada Kindergarten Health Survey 2010, Lina Zhang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Lead, as a toxic substance, invades the human body, and gradually damages the organs. Oftentimes, elevated blood lead levels are not recognized until serious health issues are found. In the United States, approximately 250,000 children aged 1-5 years have elevated blood lead levels greater than 10 micrograms of lead per deciliter of blood (Centers for Disease Control and Prevention, 2004).

However, there is no effective treatment for lead poisoning. Chelation can merely decrease the blood lead levels but cannot reverse the existing damage. To prevent and control childhood lead poisoning, many studies have been conducted to investigate the sources of …

Bacterial Adherence Of Streptococcus Mutans And Lactobacillus Acidophilus On Poly-Methyl Methacrylate And Thermoplastic Polypropene Used In Orthodontic Retention, Lindsay Ann Pfepper

UNLV Theses, Dissertations, Professional Papers, and Capstones

Retention is required in the majority of orthodontic patients throughout the remainder of their life. The two primary removable appliances are known as the traditional Hawley retainer or the vacuum formed retainer. These appliances were developed to maintain the position of the dentition without sacrificing oral health. The orthodontic population is at a higher risk for caries due to plaque accumulation from poor diet, suboptimal oral hygiene and often lack of motivation. These two retainers occupy different niches and are comprised of different materials; therefore the retainers' effect on oral health could be very different. An understanding of which bacteria …

Analysis Of The Morbidity And Mortality Of Severe Influenza Infection In Clark County, Nevada For The 2010--2011 Influenza Season, Kindra Maureen St. Jacques

UNLV Theses, Dissertations, Professional Papers, and Capstones

Influenza circulates in the community in a fairly predictable manner each year; however, throughout the duration of any influenza season, influenza strains have the ability to evolve through antigenic mutations, viral reassortment, development of anti-viral resistance, and alterations in virulence. These changes are likely to cause illness among the unimmunized and can result in severe illness or death. Therefore, it is especially important to closely monitor severe influenza-associated hospitalizations and deaths. The University of Nevada, Las Vegas in collaboration with the Southern Nevada Health District (SNHD), Office of Epidemiology (OOE) analyzed data from the severe hospitalized influenza morbidity and mortality …

A Comparative Study Of Indicator Bacteria Present In Ice And Soda From Las Vegas Food Establishments, Kimberly Jo Hertin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Microbial analysis has long been used as an indicator of water quality. Since the passing of the Safe Drinking Water Act in 1974, microbial standards have been strictly set by the Environmental Protection Agency (EPA) to ensure that the public health is protected from bacterial pathogens. The bacteriological quality of water generally deteriorates as it travels from water treatment facilities through the main distribution system and into private plumbing and distribution systems. For example, Heterotrophic Plate Count (HPC) values typically increase once the water has entered plumbing devices such as beverage vending machines. Upon reaching a private facility, the opportunity …

A Brief Content Analysis Of Attachment And Sexual Relationships In Sex Therapy And Research Journals, Kathryn Zambrano Devis

UNLV Theses, Dissertations, Professional Papers, and Capstones

A surge of scholarly publications on attachment within couple relationships prompted this content analysis of attachment articles published in six sex therapy and sex research journals. This study investigates the extent to which these journals attend to attachment in the context of adult sexual relationships. The researcher found 2257 articles published within these journals; 64 of which attend to attachment and 9 of which attend to attachment and sex. Implications for couples therapy in the field of sex therapy and future directions are discussed.

Optimizing Heart Dose Reduction For Deep Inspiration Left Breast Radiotherapy, Ronald James Harder

UNLV Theses, Dissertations, Professional Papers, and Capstones

Multiple studies have shown that an increased risk of late injury cardiac abnormalities including congestive heart failure (CHF), ischemia, and coronary artery disease (CAD) can be associated with common left breast radiation therapy (RT) techniques. Many radiation therapy clinics have adopted the Deep Inspiration Breath Hold (DIBH) technique for the treatment of the left breast with external beam therapy based on studies showing a decrease in the dose received by the heart. A common technology used to monitor inhalation during DIBH is the Real-Time Position Management (RPM) system (Varian Medical Systems, Palo Alto, CA). This study analyzes if there is …

Retrospective Investigation Of Course Content Evaluation By Students: A Survey Of Domestic Violence Education And Experience Among Current Unlv-Sdm Dental Students, Rhonda J. Everett

UNLV Theses, Dissertations, Professional Papers, and Capstones

The overall purpose of this research project is to survey experience and education of current dental students regarding domestic violence. Domestic violence has been recognized as one of our nation's most serious public health issues. Domestic violence can result in physical injury, psychological trauma, and sometimes death. Dentists can act as one of the first lines of intervention in recognizing common dental and facial trauma which may be associated with domestic violence victims including: broken teeth, facial bruising, and jaw fractures.

Current data suggest that education about domestic violence can help the dental professional in overcoming some of the barriers …

An Examination Of The Preparation, Experiences, And Attitudes Of Effective School Leaders Of Students With Disabilities: Voices From The Field, Patricia Ann Schultz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Research reflecting the preparation, experiences, and attitudes of effective school leaders of students with disabilities is scarce despite the fervent federal requirements changing special education over the past four decades. Although there is extensive literature on perspectives and contexts of disability, the legislative journey toward special education, inclusion and educational leadership, the expanding role of the principalship, principal attitudes on inclusion, and preparing educational leaders for inclusive education, a review of the related literature revealed an absence of the skill-set and disposition needed by school leaders who are improving academic achievement for students with disabilities.

This qualitative dissertation study documents …

A Landscape Approach To Late Prehistoric Settlement And Subsistence Patterns In The Mojave Sink, Tiffany Ann Thomas

UNLV Theses, Dissertations, Professional Papers, and Capstones

The environment of the Late Prehistoric period (1200 A.D. to Historic Contact) Mojave Sink was wetter than modern conditions. The settlement and subsistence patterns of the occupants of the region during this period were driven by the availability of water, subsistence resources, raw material sources, and tradition. These people utilized the regional landscape based upon the seasonal availability of these resources. Supplemental agricultural production has been proposed for the Mojave River Delta due to the more favorable environmental conditions of this period. If agriculture was being practiced it would have affected the regional land-use patterns. For this thesis I propose …

Causes Of Job Turnover In The Public School Superintendency: An Explanatory Analysis In The Western United States, Toby A. Melver

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this mixed-methods study was to determine the factors that affect public school superintendent turnover in five western states. An explanatory theory was developed to cover all of the possible variables and show the relationship between those variables. The questions that guided this research study were:

(1) What environmental factors influence the tenure of superintendents in western states?

(2) What governance factors influence the tenure of superintendents in western states?

(3) What personal factors influence the tenure of superintendents in western states?

(4) What are the incentives and/or disincentives that influence the tenure of superintendents in western states? …

Clarinet Performance Practices For Alberto Ginastera's "Variaciones Concertantes": Solutions For Orchestral Auditions And Performances, Thomas James Kmiecik

UNLV Theses, Dissertations, Professional Papers, and Capstones

The principal clarinet part of Alberto Ginastera's Variaciones concertantes (1953) requires the performer to execute a number of exposed passages that are considered impractical by many clarinetists as published. The Boosey & Hawkes edition of Variaciones concertantes was published for the B-flat clarinet. On account of this clarinet choice, the part exceeds the traditional upper range of the instrument in the third variation (Variazione in modo di Scherzo per Clarinetto ). Moreover, it requires very awkward fingering patterns in passages because they are written in the Phrygian mode of C-sharp. To avoid some of these technical obstacles, many professional …

Newe Country: Environmental Degradation, Resource War, Irrigation And The Transformation Of Culture On Idaho's Snake River Plain, 1805--1927, Sterling Ross Johnson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Idaho's Shoshone and Bannock Indians have long relied upon the Snake River. The waterway provides salmon and waters the vast Camas Prairie. On the prairie grows the Camas plant, the roots of which Shoshones and Bannocks harvest as a staple of their diet. Grass also grows on the prairie and the surrounding plains, which fed huge herds of bison that Shoshones and Bannocks also relied upon for food and skins to wear and trade. As a result of integration into the globalizing economy initiated by Meriwether Lewis and William Clark, indigenous peoples of the area and Euroamericans overhunted bison populations, …

Changing Climatic Conditions In The Colorado River Basin: Implications For Water Resources Management In The Las Vegas Valley, Srijana Dawadi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Climate change affects the water available in a region. It also affects the water demand, because of the increase in temperature. A system dynamics model was developed for the Colorado River Basin (CRB), operating at a monthly time scale, to assess the potential impacts of climate change on streamflow in the Colorado River and its subsequent impact on the water resources management in the Las Vegas Valley (LVV). The effect of climate change on streamflow was evaluated using 16 global climate model outputs for 3 emission scenarios, also referenced in the Inter-Governmental Panel on Climate Change Fourth Assessment Report. Risk …

Paired Positive Carbonate Carbon Isotope, Organic Carbon Isotope, And Oxygen Isotope Composition Study Across The Lower Mississippian Positive Carbon Isotope Excursion, Southeastern Nevada, Usa, Robert Alan Henry

UNLV Theses, Dissertations, Professional Papers, and Capstones

A prominent positive carbonate carbon isotope (delta13Ccarb) excursion of Early Mississippian age (ca 351 Ma) has been documented by previous studies from numerous sites globally. This delta13Ccarb excursion has been interpreted as resulting from enhanced organic carbon burial that removed 13C-depleted carbon from the ocean and atmosphere. Anticipated outcomes from enhanced organic carbon burial would include a similar positive excursion in organic carbon isotopes (delta13Corg) and a global cooling event resulting from reduced CO2 in the atmosphere and ocean. These predictions, however, were not tested sufficiently in previous studies. This research has tested these predictions through an integrated study of …

On The Back Of The Army: A Comparative Study Of Romanization In Britain And Egypt, Renee Wiseman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Romanization is the process of understanding how Rome culturally expanded beyond military actions. This study seeks to compare how Romanization proceeded in the provinces of Britain and Egypt.

The Pedagogy Of Pornography: What Popular Pornography On The Internet Teaches Us About Aggression And Consent, Anthony Springrt Jr.

UNLV Theses, Dissertations, Professional Papers, and Capstones

Pornography remains a highly discussed and hotly debated topic within the academy and popular culture. Despite declining revenues for pornographic content, the proliferation of the Internet makes pornography easier to access than ever before. This study examines aggression and consent in popular pornography on the Internet. One hundred scenes across five highly trafficked Web sites’ “most viewed” sections were selected for analysis. Consistent with existing research literature, women were overwhelmingly the targets of aggressive acts and typically expressed consensual reactions to acts of aggression. The results are examined within the context of social learning theory to posit what ideas and …

Microstructural Characterization Of Kinked Germanate Olivine Grains, Alex Gregory Drue

UNLV Theses, Dissertations, Professional Papers, and Capstones

Olivine is the most common and the weakest mineral in the upper mantle. Thus the strength of olivine controls the rheology of the earth's upper mantle. The rheology of olivine in the upper mantle has important implications for mantle flow, mountain building, and rates of isostatic adjustment. Recent experimental measurements of the flow strength of deformed olivine polycrystals have assumed a homogeneous state of stress. X-ray synchrotron diffraction experiments have implied that this assumption is not always valid. Elastic Plastic Self Consistent (EPSC) modeling offers an approach to estimating the flow strength of olivine that does not assume a homogeneous …

Consolidated Study On Query Expansion, Abhishek Biruduraju

UNLV Theses, Dissertations, Professional Papers, and Capstones

A typical day of million web users all over the world starts with a simple query. The quest for information on a particular topic drives them to search for it, and in the pursuit of their info the terms they supply for queries varies from person to person depending on the knowledge they have. With a vast collection of documents available on the web universe it is the onus of the retrieval system to return only those documents that are relevant and satisfy the user’s search requirements. The document mismatch problem is resolved by appending extra query terms to the …

Challenges In Researching The Relationship Between Delinquency And Family Dynamics In Juvenile Sex Offenders, Dio Kevin Turner Ii

UNLV Theses, Dissertations, Professional Papers, and Capstones

Recently developed treatment approaches on juvenile sex offenders include the offenders and their families. These approaches have some empirical support; however, little research attempts to link family dynamics and child abuse with juvenile re-offending. This study attempted to examine the family dynamics from the juveniles’ perspective. The Family Assessment Measure (FAM-III), Parental Bonding Instrument (PBI), Self Reported Delinquency measure (SRD), and Childhood Trauma Questionnaire - Short Form (CTQ-SF) were used to assess family dynamics, parenting style, delinquency and childhood maltreatment, respectively. Problems with recruitment resulted in too few participants (N=6) to conduct meaningful statistical analyses. Participant responses suggested elevated impression …

Factors Which Influence The Use Of Active Learning Strategies By Nursing Faculty, Deborah Lowell Shindell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nursing education is facing a crisis. Anachronistic teaching methods are no longer keeping up with the needs of new graduates entering practice. Despite a body of knowledge which supports the use of active learning in higher education, nursing faculty continue to rely on lecture as their primary pedagogical approach. Previous study of the use of research products in clinical nursing practice identified systematic factors such as characteristics of the communication of research findings and characteristics of the organization form the greatest barrier to use. This study discovers if these same barriers face nursing educators.

Using Roger‟s Theory of Diffusion of …

Students With Reading Disabilities Participating In Literature Discussions: A Case Study, Elysha Patino O’Brien

UNLV Theses, Dissertations, Professional Papers, and Capstones

This qualitative case study addressed a lack of research concerning literature discussions for students with learning disabilities in reading. Fourth and fifth grade students with reading disabilities participated in twice-weekly literature discussions, 30- to-60 minutes each, for 12 weeks. The students attended a Title I school and most were Hispanic males. Together, they read and discussed five postmodern picturebooks. The purpose of the study was to understand (a) reader responses to the illustrations, text, and postmodern features of the books, and (b) the individual reader’s response habits. Situated within a sociocultural frame, the theories guiding this study pertained to language …

Sensing And Transmission Strategies In Wireless Cognitive Radio Systems, Babak Abbasi Bastami

UNLV Theses, Dissertations, Professional Papers, and Capstones

The main challenge in any cognitive radio system is to maximize secondary users throughput while limiting interference imposed on licensed users. In this regard, finding the optimal sensing and transmission timing strategies and accurate sensing techniques are of great importance in a cognitive radio network.

In this thesis, we study a sensing-transmission scheme for secondary user in a cognitive radio system where the secondary user senses every primary channel independently and transmits a signal for a fixed duration if it finds the channel empty and stays idle for another fixed duration if it senses the channel busy. We obtain optimal …

The Influence Of Ethnic Identity And Family Support On Posttraumatic Symptoms In Maltreated Youth, Harpreet Kaur

UNLV Theses, Dissertations, Professional Papers, and Capstones

Maltreated children are at greater risk of developing PTSD than nonmaltreated children (Ackerman et al., 1998; Epstein et al., 1997; Famularo et al., 1996; Kilpatrick et al., 2003; Widom, 1999). This study sought to assess the role of ethnicity, ethnic identity, and family support on the effects of maltreatment and trauma in adolescents. Participants (n=145) included adolescents from Child Haven, a Department of Family Services (DFS)-related site in Las Vegas, and youths in foster care assessed at the offices of Dr. Stephanie Holland. The first hypothesis was that non-Caucasian youth would have higher levels of PTSD-related symptoms than Caucasian youth. …

Bridging The Chasm: Emerging Model Of Leadership In Intercollegiate Athletics Governance, John C. Chandler Iii

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation examined how the executive leadership model influenced the leadership and governance of intercollegiate athletics. The focus centered on understanding the role of Athletic Directors who concurrently serve as institutional Vice Presidents using the Social Constructivist framework. Qualitative analysis was utilized to achieve the kind of examination necessary to uncover the rich and in-depth perspectives of the participants. At the time of the study, there were 119 institutions housing NCAA Division IA athletic departments. Of the 119 distinct athletic departments, there were 17 athletic departments that employed an athletic director that had been appointed to the post of university …