Digital Commons Network^™

Functions And Correlates Of Deliberate Self-Harm Among Adjudicated Male Adolescents, Jenna Silverman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Deliberate self-harm (DSH) is self-inflicted physical injury without suicidal intent. Recent studies indicated that more adolescent males engage in DSH than previously identified. Research demonstrated that DSH is common in forensic settings and highly correlated with several mental health disorders. This study included 103 adjudicated male adolescents assessed for DSH and mental health concerns. Twenty-two participants with DSH history and 21 controls were interviewed about coping skills, mental health problems, and DSH functions. Results indicated that 66%, especially African American and Hispanic participants, reported DSH history. Participants with DSH history reported more aggression, emotional lability, alienation/boredom, and internalizing disorders but …

The Utilization Of A Hybrid Task Technologyfit-Technology Acceptance Model For The Evaluation Of Hotel Guest Empowerment Technologies Usage, Thomas Schrier

UNLV Theses, Dissertations, Professional Papers, and Capstones

In the modern economy organizations are trying to find every means possible to increase productivity and reduce costs. As such many organizations have turned to technology to aid in this. Due to this in recent years there has been a transition from traditional consumer self-service environments to technology assisted self-service environments. Through the use of technology customers are able to create products and services for purchase by with little to no help from the organization providing the products and services.

The hotel industry has also seen a rise in the use of technology applications to guests in performing services once …

Recent High School Graduates Knowledge About Physical Activity Guidelines And Disease Related To Sedentary Lifestyle, Soojin Yoo

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study examined recent high school graduates' knowledge about physical activity (PA) guidelines and disease related to sedentary lifestyle. Using a cross-sectional descriptive design, focus was on assessing knowledge performance and relating it to gender, ethnicity, PA behavior, and conceptualizations about high school health education (HE) and physical education (PE). Study participants were 394 recent high school graduates between the ages of 18-20 years of age. Participants completed a questionnaire designed to measure knowledge about PA guidelines and disease associated with sedentary lifestyle. In addition, the questionnaire also comprised items designed to capture demographical information and provide some information about …

Sequence And Chemostratigraphic Study Across The Basal Eureka Quartzite Unconformity In The Great Basin, Nevada: Implications For The Origin Of The Late Ordovician Carbon Isotope Excursion, Apostolos Paul Kosmidis

UNLV Theses, Dissertations, Professional Papers, and Capstones

The positive carbon isotope (δ 13 C) excursion from the late Middle Ordovician Copenhagen Formation that underlies the Eureka Quartzite in central Nevada has been hypothesized to record a global cooling event ∼10 Myr prior to the well-recognized Late Ordovician Hirnantian glaciation (∼443 Ma). However, direct evidence for pre-Hirnantian continental glaciation remains scarce, raising uncertainties in the relationship between the inferred eustatic sea-level fall and the origin of the positive δ 13 C excursion. Additionally, previous stratigraphic studies from southern Nevada and California suggest relative sea-level fall in excess of ∼ 150 meters, which exceeds estimates for younger glacial periods …

Diversity Issues In Recruitment And Retention Of Clients For Parenting Classes, Rachel Elizabeth Davis

UNLV Theses, Dissertations, Professional Papers, and Capstones

Parenting skills classes are an effective means of preventing and remediating juvenile delinquency, youth violence, and child maltreatment. In particular, juvenile delinquency and child maltreatment disproportionately affect low-income African American families. Unfortunately, data from most parenting classes suggest dismal attendance and participation rates for racial- and ethnic-minorities from low-income backgrounds. The lack of effective recruitment may be due, in part, to the level of cultural competency inherent in the design, content, and implementation of existing parenting classes. Using semi-structured interviews and the qualitative methodology of grounded theory, this study explored the self-reported parenting beliefs, values, and struggles of a sample …

Performance Evaluation Of Network-On-Chip Interconnect Architectures, Xinan Zhou

UNLV Theses, Dissertations, Professional Papers, and Capstones

With a communication design style, Network-on-Chips (NoCs) have been proposed as a new Multi-Processor System-on-Chip paradigm. Simulation and functional validation are essential to assess the correctness and performance of the NoC design. In this thesis, a cycle-accurate NoC simulation system in Verilog HDL is developed to evaluate the performance of various NoC architectures. First, a library of NoC components is developed based on an existing design. Each NoC architecture to be evaluated is constructed from the library according to the topology description which specifies the network topology, network size, and routing algorithm. The network performance of four NoC architectures under …

A Multiple Case Study Of College First-Year Seminars, Karen Ruth Mills Reid

UNLV Theses, Dissertations, Professional Papers, and Capstones

John N. Gardner in 1972 advocated a new concept called the first-year seminar to increase academic performance and retention for freshmen students. The term "first-year seminar" defined a fairly diverse instructional construct, but the goal was clear and focused. It was to improve student retention rates. Research trends indicated a positive and almost always statistically significant relationship between first-year seminar participation and college achievement and higher persistence rates. Existing studies reflected a variety of significant methodological issues. Also; few cross-institutional research studies were reported and far fewer considered the content of the construct called a first-year seminar. The purpose of …

Bending Of Woody Riparian Vegetation As A Function Of Hydraulic Flow Conditions, John O. Goreham

UNLV Theses, Dissertations, Professional Papers, and Capstones

Vegetation encroachment reduces channel conveyance capacity below design objectives and greatly increases the risk for loss of life and property damage in the case of large flood events. Given minimal knowledge of hydraulic roughness for shrubs and woody vegetation, accurate estimation of channel capacity and water surface elevation is difficult. The ability to predict a tree's bent, reduced height in the presence of flow permits more accurate prediction of hydraulic roughness and water surface elevation.

In this study, field tests were performed to elucidate tree bending properties, which in turn served as input parameters for a numerical algorithm designed to …

Sensory Imagery And Aesthetic Affect In The Poetry Of Keats, Hopkins, And Eliot, Clare Louis Gerlach

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation focuses on applying a new method of analysis to selected works by three major poets, John Keats, Gerard Manley Hopkins, and T. S. Eliot. The project considers their work in light of recent scholarship by Charles Altieri on the affects, such as emotion, feelings, passion, and mood; how these affects operate in artistic works; and, specifically, examines how these authors employ the affects in their poetry to express their own emotions and, in the creation of lyric poems, turn these emotions into works of art. In addition, the project strengthens the aesthetic readings with a study of the …

Governor James G. Scrugham And The Search For Economic Prosperity For Nevada, 1923--1927, Paul Robert Bruno

UNLV Theses, Dissertations, Professional Papers, and Capstones

James G. Scrugham, Nevada's 14 th governor, assumed office during the economic downturn of the early 1920s. The Comstock, and Tonopah - Goldfield mining boom days were in the past, and the new governor made development of a sustainable economic model for the state the top priority of his administration.

Governor Scrugham focused on education, irrigation, parks, and highways as vehicles for economic development, and significant accomplishments were made in all these areas during his term. The governor's initiatives, however, failed to immediately alter the state's economy away from agriculture and mining. The passage of the gambling and divorce bill …

Posttraumatic Stress Disorder And Other Consequences Of A Picu Admission, Stephanie Ann Stowman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Currently, there is a paucity of literature regarding children's experiences in a pediatric intensive care unit (PICU) relative to caregivers' experiences. Children admitted to a PICU and their caregivers are at risk for various psychopathology. Disorders commonly identified in seriously ill children include depression, anxiety, acute stress disorder, and posttraumatic stress disorder. Caregivers of seriously ill children are at increased risk of depression, generalized anxiety disorder, acute stress disorder, and posttraumatic stress disorder. Researchers often fail to examine all relevant psychopathology and contributing factors and stressors, such as family environment, in seriously ill children and their caregivers. This study assessed …

Spectral Analysis Of Pathological Acoustic Speech Waveforms, Priyanka Medida

UNLV Theses, Dissertations, Professional Papers, and Capstones

Biomedical engineering is the application of engineering principles and techniques to the medical field. The design and problem solving skills of engineering are combined with medical and biological science, which improves medical disorder diagnosis and treatment. The purpose of this study is to develop an automated procedure for detecting excessive jitter in speech signals, which is useful for differentiating normal from pathologic speech. The fundamental motivation for this research is that tools are needed by speech pathologists and laryngologists for use in the early detection and treatment of laryngeal disorders. Acoustical analysis of speech was performed to analyze various features …

Illegal Immigration And Worldview Defense: Distaste For Human Migration In The Context Of Tmt, John Matthew Bergen

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study examines the impact of mortality salience on opinions about illegal immigrants. Participants were asked to write about their own death or a control subject and then presented with scenarios of illegal immigration to the United States. The scenarios included a defendant who was either of Latin American or European origin and had or had not learned to speak English. However, the European condition had to be dropped due to unreliable identification of the origin of the European defendant. The results indicate that mortality salience caused an increase in the preference for deportation of an illegal immigrant who was …

Race Stereotypic Crimes And Juror Decision Making: Hispanic, Black, And White Defendants, Joseph Francis Boetcher

UNLV Theses, Dissertations, Professional Papers, and Capstones

A race stereotypic crime is a crime that most people tend to associate with a certain race. This is a type of racial bias that affects juror decision making by undermining the presumption of innocence and lowering the prosecution's burden of proof. Two studies investigated race stereotypic crimes. Study 1 used a new scale to identify race stereotypic crimes for black, Hispanic, and white males. Study 2 used a mock juror paradigm with a realistic stimulus and sensitive measures to focus on the influence of this type of bias on mock juror decision making. Study 1: Participants were 143 undergraduate …

Brothers Are Better Than Sisters: A Semiotic, Feminist Analysis Of Hbo's "Rome", Patricia Mamie Peers

UNLV Theses, Dissertations, Professional Papers, and Capstones

In 2005, the Home Box Office and British Broadcasting Corporation partnered to produce Rome , a television series that retells the Roman histories of Julius Caesar, Marc Antony and Augustus through the lives of two centurion soldiers, Titus Pullo and Lucious Vorenus. The show's producers endeavored to bring Roman streets to life and included more storylines of women, men and children of all classes. At first considered a more egalitarian approach to history, Rome 's women are said to "challenge expectations" (Vu, 2005) and "forge a new path" (Ragalie, 2007, p. 2). But does this new representation challenge the old …

Ac Susceptibility And Heat Capacity Studies Of The Geometrically Frustrated Pyrochlores Terbium Titanium Tin Oxides And Holmium Titanates, Daniel Antonio

UNLV Theses, Dissertations, Professional Papers, and Capstones

Materials with a geometrically frustrated magnetic pyrochlore lattice have been of interest due to their unusual ground states. Tb 2 Ti 2 O 7 is known for having a spin liquid ground state which does not transition to a long-range ordered state down to at least 50 mK. Ho 2 Ti 2 O 7 has a macroscopically degenerate spin ice ground state which resembles that of the proton ordering in water ice. Heat Capacity measurements of Tb 2 Ti 2- x Sn x O 7 were done down to 0.36 K and AC magnetic susceptibility measurements of Ho 2- x …

High Pressure Phase Transistions In The Lanthanide Sesquioxides, Jason Patrick Mcclure

UNLV Theses, Dissertations, Professional Papers, and Capstones

Crystallizing into 5 known polymorphic forms, the rare-Earth sesquioxides RE 2 O 3 represent a family of 4-f electron compounds that have been the subject of study for many years. Aspects of the systematics in the structural phase transitions for RE 2 O 3 (RE=La, Sm, Eu, Gd, Y, Er, Yb, Lu) under pressure were studied using diamond anvil cells (DACs). As a part of this study, detailed equation of state (EOS) data for all these compounds were obtained through the use of angle-dispersive x-ray diffraction (XRD) where anomalies in compression data led to the detailed investigation into one particular …

Teacher Candidates' Attitudes Toward Immigration And Teaching Learners Of English As A Second Language, Midena M. Sas

UNLV Theses, Dissertations, Professional Papers, and Capstones

While in theory, democratic ideals promise the equal participation of all its citizens in the decisions that affect them, in practice some populations, i.e., those who do not possess membership to the dominant cultural group, often miss out on the privileges a democratic society is supposed to ensure. Critical theorists pointed out that "democracies like ours exhort equal opportunity but often ignore ways in which our schools operate unconsciously and unknowingly to guarantee that there will be no real equality" (McLaren, 2007, p. 176). In the education arena, inequitable treatment has received significant attention, perhaps due to the glaring repercussions …

Soil Moisture And Water Stage Estimation Using Precipitation Radar, Sumit Puri

UNLV Theses, Dissertations, Professional Papers, and Capstones

In south-western United States, soil moisture data is important for drought studies in the region which is experiencing a drought for many years, whereas in South Florida, water stage data is required by hydrologists to monitor the hydrological flow in wetlands. Soil moisture data and water stage data are not sufficiently available due to sparse monitoring stations. Installation of dense measuring stations over an extended area is costly and labor intensive. Therefore, there is a need to develop an alternative method of measuring soil moisture and water stage. Microwave remote sensing has proven to be a useful tool in the …

Chinese Transnationalism And The Creation Of A Liberal Public Sphere, Lanelle Elizabeth Christman

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis is a global comparative study tracing the functions and historical development of Chinese huiguan ["official organization"] and its leadership in China, Indochina, and San Francisco. Early Chinese immigration to America and Indochina involved the formation of huiguan, organizations based on dialect and native place, paralleling the functions and demography of merchant associations originating in China. The merchant elite representing its leadership were preeminent arbitrators of Chinese tradition and authority. French Indochina and America recognized their status as community leaders, further exalting the social standing of merchants and increasing their positions of authority. These organizations greatly influenced the lives …

Communication Technologies: Diffusion Of Online News Use And Credibility Among Young Web Users In The Information Age, Chee Youn Kang

UNLV Theses, Dissertations, Professional Papers, and Capstones

The increasing popularity and extensive usage of communication technologies, particularly the Internet and online news, makes it important to obtain an insightful perception of the new media. The purpose of this study is to examine the diffusion of online news use and credibility among young web users in terms of how these main users adopt, use, and trust the new media. This study attempts to find which online news sites are widely used by this group, based on the credibility of online news adopted among undergraduate and graduate students at the University of Nevada, Las Vegas (UNLV), in which demographic …

Disease In The Desert: Las Vegas As A Case Study Of How First Responders And Emergency Managers Understand Novel Threats To Human Health And Plan To Respond During Biological Emergencies, Monique Williamson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Over recent years it has become clear that technological advancements, globalization, and ecological change, combined with the onset of increased terrorist incidents, are all currently working to create an extremely hazardous environment in terms of pathogenic invasion. Realizing that infectious diseases are both newly emerging and re-emerging in many parts of the world, the question of how prepared an expansive United States will be in the face of an oncoming global pandemic is easily raised. Using Las Vegas as an example of just how unequipped a largely visited U.S. city may be in the face of such a situation, this …

Adult Esl Student Perceptions On Computer Assisted Language Learning, Jillian Burrus

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research study was to explore my adult English as a second language (ESL) student's experiences with technology as a method of improving English acquisition. The area of computer assisted language learning (CALL) is increasingly becoming important within the second language learning arena. As the expansion of available technology continues to increase, insight into opinions about the effectiveness of CALL and specifically those opinions of the actual users will be needed.

As an instructor of adult ESL students, my study focused on providing information about my student's use of technology for future personal classroom praxis. This research …

Studying The Impacts Of Primary Incidents On Freeways To Identify Secondary Incidents, Rohit Reddy Saddi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Freeway incidents are associated with different impacts such as traffic congestion, delays, fuel consumption, secondary incidents etc. Secondary incidents are caused due to primary incidents and require the same personnel who are already engaged. This thesis studies various impacts caused by primary incident in space and time occurring on the freeways and these results are applied to identify secondary incidents. Three types of impacts are identified and proposed in this study. Dynamic nature of queue length in the direction of accident is studied. Dynamic nature of congestion in the opposite direction of the freeway till the accident is cleared is …

On-Board Three-Dimensional Object Tracking: Software And Hardware Solutions, Ajay Kumar Mandava

UNLV Theses, Dissertations, Professional Papers, and Capstones

We describe a real time system for recognition and tracking 3D objects such as UAVs, airplanes, fighters with the optical sensor. Given a 2D image, the system has to perform background subtraction, recognize relative rotation, scale and translation of the object to sustain a prescribed topology of the fleet. In the thesis a comparative study of different algorithms and performance evaluation is carried out based on time and accuracy constraints. For background subtraction task we evaluate frame differencing, approximate median filter, mixture of Gaussians and propose classification based on neural network methods. For object detection we analyze the performance of …

Extents And Limits Of Radioscopic Detection Of Nuclear Materials In Cargo Containers With Two Megavoltage Energy Barriers, Vijay Kumar Mandava

UNLV Theses, Dissertations, Professional Papers, and Capstones

The megavoltage X-ray technology is utilized for detecting nuclear materials in cargo containers. Interlaced response is obtained by switching rapidly between 6MeV and 9 MeV beams. It is known that the ratio of penetration levels of cargo contents taken at nominal and dual energies provides the information about atomic numbers of materials, and thus can also indicate the threat group. However, the identification is not straightforward if combinations of materials are present. The latter can lead to misdetections. It is imperative to know what are the extent and the limit of the currently employed technology, and how to carry out …

Design And Characterization Of A Shock And Vibration Mitigation Seat System, George Samaan Ladkany

UNLV Theses, Dissertations, Professional Papers, and Capstones

Extensive research has been conducted into the development of pneumatic seatbladder systems for shock and vibration mitigation for use in current U.S military vehicle envelopes. This research expands on the previous work through an elaborate experimental characterization of four prototype air bladder seat cushion systems. The experimental characterization conducted included shock testing, continuous vibration, and internal dynamic pressure measured during the shock event.

The shock testing was conducted both at the Army Research Lab as well at UNLV. The shock testing conducted at UNLV was performed on a drop tower designed and constructed during the time of this research. The …

Desert Varnish As An Indicator Of Modern-Day Air Pollution In Southern Nevada, Piotr Nowinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rock varnish, often called desert varnish, is a slow-growing, manganese-rich coating that accumulates on exposed rock surfaces. The mechanism of varnish formation is not fully understood, however, most authors agree that varnishes derive their components from the atmosphere. The main goal of this study was to demonstrate the potential use of desert varnish as a passive environmental monitor of present and past atmospheric pollution. Analysis of varnishes is a new field that can potentially provide records of pre-anthropogenic levels of atmospheric metals and other environmental pollutants. To evaluate the potential of desert varnish as an environmental monitoring tool, the following …

Trends In Asthma Health Care Utilization At University Medical Center (Umc) Of Southern Nevada In Las Vegas, 2000-2007, Aishia Tennille Henderson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Lifetime asthma prevalence is the physician diagnosis of asthma while current asthma prevalence is the existing asthma symptoms. In Nevada, the pediatric current and lifetime asthma prevalence rates were 7.1% and 11.8% in 2006. Similarly, the adult current and lifetime asthma prevalence rates were 6.9% and 13.4% in 2007.

Characterization studies examining trends of asthma health care utilization for children and adults are not well studied for Las Vegas, Nevada. This project determined if trends in asthma admissions at UMC hospital of Southern Nevada in Las Vegas have increased longitudinally across years and characterizes which demographic subgroups are disproportionately affected …

Metal Induced Crystallization Of Silicon Thin Films, Sandeep Kumar Raju Sangaraju

UNLV Theses, Dissertations, Professional Papers, and Capstones

Low temperature crystallization of thin film silicon is important for many industrial applications including flat panel displays and silicon thin film solar cells. Unfortunately this remains a major challenge since crystallization temperature of silicon is above 1,000 degrees Celsius, thus limiting to substrates that can tolerate high temperatures. The inability to deposit crystalline thin films on glass substrates is the reason why flat panel display industry uses amorphous silicon for LCD active matrix displays. Thus the ability to deposit crystallized thin film silicon at low temperatures will have significant impact on thin film silicon applications. It has been observed that …