Digital Commons Network^™

Effectiveness Of Earthtec ® On Killing Invasive Quagga Mussels (Dreissena Rostriformis Bugenis) And Preventing Their Colonization In The Western U.S., Ashlie Watters

UNLV Theses, Dissertations, Professional Papers, and Capstones

Dreissena rostriformis bugensis, an invasive species, also known as the quagga mussel, was discovered in Lake Mead, NV in January of 2007. In the four years since detection, quagga mussels have created tremendous economical, ecological, and human health impacts. The mussels clog pipes, ruin boat motors, and damage recreational equipment, and once established in the lake, routine maintenance is necessary to avoid further damage. Because of quagga mussels' high fecundity, planktonic veliger stage, and ability to attach to substrates with byssal threads, they have easily and swiftly spread to other lakes and reservoirs in the Lower Colorado River Basin. …

Exploring Geographic Proximity To Fast-Food Restaurants And Convenience Stores With Dental Caries In Patients At The University Of Nevada Las Vegas School Of Dental Medicine, Charles K. Hill

UNLV Theses, Dissertations, Professional Papers, and Capstones

Dental caries is present worldwide and has afflicted over 90% of all adults in the United States. Biological determinants of the disease are well understood but social determinants and how they interact with biological factors are not. Programs designed to reduce incidence and prevalence of caries often target certain individuals and involve behavioral change. Some programs are more successful when environmental and societal issues are also addressed (Watt, 2002). Biological and behavioral processes leading to caries should include the modification of social factors to enhance results of prevention programs designed to reduce caries in populations. Preventing disease comes not only …

Analysis Of Ghrelin Concentrations In Serum Samples Processed At One, Two, And Three Hours After Collection, Christine E. Prato

UNLV Theses, Dissertations, Professional Papers, and Capstones

Obesity is becoming an epidemic of modern society. While the health-related consequences of obesity have been well studied, scientists continue to search for biological risk factors associated with this disease. Since the 1999 discovery of an appetite-stimulating hormone, ghrelin, researchers have further questioned the physiological interactions that lead to obesity. The fundus of the stomach, as well as the intestines and kidneys produce ghrelin before it circulates throughout the body and attaches to its receptor sites located within the section of the brain responsible for appetite-regulation. The hormone increases and decreases in a circadian rhythm that may dictate the routine …

High-Risk Human Papillomavirus (Hpv): An Emerging Health Issue For Women And Minorities, Dierdre O. Turner

UNLV Theses, Dissertations, Professional Papers, and Capstones

The human papillomavirus (HPV) is the cause of nearly all cases of cervical cancers worldwide. HPV viral DNA is found in more than 99% of cervical cancers. In addition to cervical cancer, HPV is also associated with some breast and oral cancers. White women have been showing a decline in breast cancer rates while black women are continuously showing higher rates of mortality from both breast and cervical cancer. Minority women are also more likely to receive a late diagnosis and are showing increased incidence of oral cancer, which makes study of HPV in women and minorities significant.

To date, …

Testosterone And Vasopressin In Men’S Reproductive Behavior, Eric T. Steiner

UNLV Theses, Dissertations, Professional Papers, and Capstones

One common practice used by researchers is to divide human reproduction into two major domains: mating and parenting. Adaptive problems men faced over the millennia may have produced evolutionary pressure for hormone responses and behavior that facilitate both mating and parenting, either separately or simultaneously. The sometimes competing domains of mating and parenting in men are often mediated by a number of the same hormones, such as testosterone (T) and arginine vasopressin (AVP). One aim of the current study was to examine differences in baseline levels of T and AVP between childless men who were not in an exclusive, romantic …

The Development And Evaluation Of A Safety Skill Intervention For Child Victims Of Neglect, Heather H. Hill

UNLV Theses, Dissertations, Professional Papers, and Capstones

Child neglect is the least studied, yet most frequently indicated, type of child maltreatment. Still, there are few assessment and treatment methods specifically designed for victims of child neglect. Unintentional injuries have long remained the leading cause of death for children in the United States after the first year of life, and research suggests the majority of these child fatalities are actually the result of child neglect. Homes of neglectful families are often inundated with safety hazards but child-focused home safety skill interventions have yet to be developed. Thus, the present study focused on the development and initial evaluation of …

The Dilemma Of Minors’ Access To Adult Content On The Internet: A Proposed Warnings Solution, Helen Zaikina-Montgomery

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Internet can be a dangerous place for children. Because minors have unrestricted access to adult content, a system of warnings targeting minors on the Internet should be developed. The present studies tested icons for such a system and subsequently to examined selected icons in combination with signal words, color, and warning messages. One hundred and ninety three adults and eleven children participated in the first study. Participants rated thirty eight icons created by the researcher for their understandability, carefulness, attention-getting, likelihood of encountering and severity of danger, likelihood of avoidance and familiarity. Familiar icons were found to be rated …

Lead Concentrations In Extracted Primary Teeth Among Clark County Pediatric Patients, Jennifer A. Berger

UNLV Theses, Dissertations, Professional Papers, and Capstones

Childhood lead poisoning is a completely preventable condition, yet only a small portion of children in Nevada are screened for elevated blood lead levels. In 2009 only 6.11 percent of children in Nevada were screened for lead indicating that Nevada would benefit from an alternative method of screening for childhood lead exposure. Deciduous teeth are not currently recognized by the Centers for Disease Control and Prevention as diagnostic samples for the measurement for lead exposure. However, this unique and innovative detection method utilizes opportunistic samples that will contribute to the childhood lead poisoning prevention efforts in Nevada.

The objectives of …

Woman Or Warrior? How Believable Femininity Shapes Warrior Women, Jessica D. Mccall

UNLV Theses, Dissertations, Professional Papers, and Capstones

My dissertation is an exploration of how femininity is constructed in the characters of warrior women. I define and apply my theory of believable femininity: the notion that in order for characters gendered female to be accepted by an audience, specific textual markers must render them submissive to a dominating male figure. I examine the following warrior women at length: Britomart and Radigund from Spenser's The Faerie Queene; Christine de Pizan's treatment of Amazons in her Book of the City of Ladies and Hippolyta's specific portrayal by de Pizan in comparison to Shakespeare's Midsummer Night's Dream, and the …

Consensus On The Colorado: Issues In The Allocation Of A Limited Resource, Jeffrey D. Tilton

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to identify current issues in water allocation in the Lower Colorado River Basin and to locate existing areas of consensus among its stakeholders. Surveys, both paper and web-based provided the data required to measure overwhelming agreement on issues. The data analysis served to locate the areas of agreement within and between interest groups. While overwhelming agreement between all groups proved to be a relatively rare occurrence, the existence of issue specific agreement between two or more groups was more common than expected. Accord was demonstrated in all four major areas: allocation, augmentation, conservation, and …

Bioarchaeology Of Compassion: Exploring Extreme Cases Of Pathology In A Bronze Age Skeletal Population From Tell Abraq, U.A.E., Jamie D. Vilos

UNLV Theses, Dissertations, Professional Papers, and Capstones

Tell Abraq is a Bronze Age archaeological site located in the modern day United Arab Emirates and was occupied from the 3rd millennium BC to the 1st century AD. The coastal location provided access to both marine and agricultural resources as well as trade routes and foreign exchange. The tomb at the site was in use for 200 years (2200-2000 BC) and housed the commingled remains of a minimum of 286 adults. These individuals lived hard lives, dependent on good health to maintain a life-line of sustenance for themselves and each other. A number of individuals with severe expressions of …

Summerview, Laura Breitenbeck

UNLV Theses, Dissertations, Professional Papers, and Capstones

Summerview is a thesis-length work of fiction in fulfillment of the requirements of the MFA program in Creative Writing. It is a story about a religious family with a disruptive event in its past. It is also about objects such as billboards. Everyone in the story lives in the United States of America and is afraid of something.

Playing With Fire Or Arson? Identifying Predictors Of Juvenile Firesetting Behavior, Mary Ellen Britt

UNLV Theses, Dissertations, Professional Papers, and Capstones

Firesetting is a complex behavior that spans a wide range of developmental stages in childhood and adolescence and involves varying motivations and intents. A better understanding of this destructive behavior is critical to developing strategies to control its devastating effects. The purpose of this research project was to identify potential predictors of juvenile firesetting behavior by studying youth who were enrolled in a regional firesetting intervention program. Data collected from firesetting assessment instruments completed by parents or guardians of program participants were examined. In the analyses, special emphasis was placed on evaluating associations between juvenile firesetting behavior and the socioeconomic …

A Change Of Heart: A Phenomenographic Study Of Conversation, Marjorie Kay Meckes Conner

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study investigated the use of a school-level leadership model intended to explore the institutionalization of principal-teacher conversations as a tool in leading and learning. An elementary principal and two teachers at five elementary schools were selected for the study. Over an eight-week time, the principal and each teacher held a series of at least four conversations. The investigator interviewed each of the fifteen participants prior to any conversations, at the mid-point of the conversations and at the conclusion of all conversations. The purposes of this exploratory study were to document participant perceptions of the usefulness and importance of principal-teacher …

Optical And Raman Characterization Of Ald Alumina Coated Multiwall Carbon Nanotubes And Nanoporous Gold Film, Naod Belai

UNLV Theses, Dissertations, Professional Papers, and Capstones

Due to their large surface to volume ratio nanostructures are inherently unstable. To insure long term stability of nano-devices, they have to be rendered inert to their environment. In this study, nanoporous gold films(NPGF) and multiwall carbon nanotubes were coated with ALD alumina of varying thicknesses. Subsequently, the plasmonic property of the former and electronic property of the latter was monitored by Transmittance and Raman Spectroscopy respectively. Transmittance spectra revealed that NPGF passivated by ALD-alumina maintains its plasmonic properties, i.e. its LSPR supporting properties remained intact. Raman spectra of ALD alumina passivated MWNTs show no coating induced changes in its …

Estimating Wildfire Potential On A Mojave Desert Landscape Using Remote Sensing And Field Sampling, Peter F. Van Linn Iii

UNLV Theses, Dissertations, Professional Papers, and Capstones

Landscape level wildfire prediction can be used to allocate wildfire resources and guide land management practices. Wildfire prediction in arid habitats in the Southwestern United States is of specific concern because of the negative ecological impacts of fire on desert habitats and the current lack of accurate fire prediction tools for such areas. This study examines the ability to predict previous fire occurrences and estimate future fire potential using satellite imagery and on the ground field survey techniques along with ignition potential data (lightning strikes and distance to roads), topographical data (elevation and aspect), and climate information (maximum and minimum …

Relationships Of Exotic Plant Invasions With Biological Soil Crust, Desert Pavement, And Soil Carbon In The Eastern Mojave Desert, Adria Decorte

UNLV Theses, Dissertations, Professional Papers, and Capstones

In a matter of 50 years, exotic annual plants have become widespread in the Mojave Desert, contributing to drastic landscape changes such as those caused by recent fires. Invasions by exotics threaten native Mojave Desert plant communities by altering community functions (e.g. fire regimes) and by reducing plant diversity. Because it is not practical, or even possible, to eradicate these exotics, developing effective prevention techniques is the key to controlling these invasions.

This thesis used a greenhouse experiment, a field experiment, and a correlational field study to examine the affect soil surface types have on the establishment of three exotic …

Impacts Of Climate Change And Weather Modification On Hydrologic Characteristics Of Watersheds In The Western United States, Anil Acharya

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research quantifies the impacts of climate change and weather modification (WM) on hydrologic characteristics of watersheds in the arid regions of the western United States. This research performs a long-term simulation of streamflow for present and future climate conditions in the North Platte (NP) Watershed, Wyoming; a shorter duration simulation is then performed to observe the likely impacts of event based changes in an urban watershed in Las Vegas, Nevada.

First, a study is carried out in Chapter 3 that evaluates the impacts of WM on water supply by developing a hydrologic model for the NP Watershed. The variable …

Association Of Oceanic-Atmospheric Oscillations And Hydroclimatic Variables In The Colorado River Basin, Ajay Kalra

UNLV Theses, Dissertations, Professional Papers, and Capstones

With increasing evidence of climatic variability, there is a need to improve forecast for hydroclimatic variables i.e., precipitation and streamflow preserving their spatial and temporal variability. Climatologists have identified different oceanic-atmospheric oscillations that seem to influence the behavior of these variables and in turn can be used to extend the forecast lead time. In the absence of a good physical understanding of the linkages between oceanic-atmospheric oscillations and hydrological processes, it is difficult to construct a physical model. An attractive alternative to physically based models are the Artificial Intelligence (AI) type models, also referred to as machine learning or data-driven …

The Effect Of Early Environmental Manipulation On Locomotor Sensitivity And Methamphetamine Condition Place Preference Reward, Emily Hensleigh

UNLV Theses, Dissertations, Professional Papers, and Capstones

Early life stress has drastic effects on neurological development, affecting health and well-being later in life. Instances of child abuse and neglect are associated with higher rates of depression, risk taking behavior, and an increased risk of drug abuse later in life (Chapman,D.P. 2004; Dube,S.R. 2003). This study used repeated neonatal separation of rat pups as a model of early life stress. Rat pups were either handled and weighed as controls or separated for 180 minutes per day during postnatal days 2-8. In adulthood, rats were tested for methamphetamine conditioned place preference reward and methamphetamine induced locomotor activity. Tissue samples …

An Ecological Study Of Peregrine Falcons (Falco Peregrinus) At Lake Mead National Recreation Area, 2006-2010, Joseph Graham Barnes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Peregrine Falcons (Falco peregrinus) represent an encouraging conservation biology success story in North America during the twentieth century. Their distribution and population size suffered major restrictions after the initiation of widespread application of the synthetic pesticide dichloro-diphenyl-trichloroethane (DDT) within the U.S. in the 1940s. The species was federally listed as endangered in the U.S. in 1969 and was then delisted in 1999 after DDT was banned in 1972. Herein, I present my ecological research of peregrines within Lake Mead National Recreation Area (LMNRA), concentrating on the years 2006-2010. This thesis is comprised of two chapters. In the first chapter, I …

Using Graphs To Represent Physical Phenomena In A Fourth Grade Classroom, Mehmet Fatih Dulger

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study examined to what extent inquiry-based instruction supported with real-time graphing technology improves fourth grader's ability to interpret graphs as representations of physical science concepts such as motion and temperature. This study also examined whether there is any difference between inquiry-based instruction supported with real-time graphing software and inquiry-based instruction supported with traditional laboratory equipment in terms of improving fourth graders' ability to interpret motion and temperature graphs. Results of this study showed that there is a significant advantage in using real-time graphing technology to support fourth graders' ability to read and interpret graphs.

Identifying And Reducing Lead Exposure Associated With The Use Of Cultural Practices In Southern Nevada Hispanic Communities, Maria Castillo-Couch

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite large amounts of national data on lead and childhood lead poisoning, the status of childhood lead exposure in Nevada as a result of the use of cultural practices in the Hispanic population is unknown. The influx of immigrant Hispanic populations to Nevada, their low education level, the high number of them who are living in poverty present an increased risk for children to be exposed to lead through the use of imported consumables, home remedies and alternative medicine (i.e., healers/ sobadores).

A 61-question survey collected data from Hispanics over 18 years of age who have or take care …

Personality, Presence, And The Virtual Self: A Five-Factor Model Approach To Behavioral Analysis Within A Virtual Environment, Michael Patrick Mccreery

UNLV Theses, Dissertations, Professional Papers, and Capstones

For several decades, researchers have explored the existence of the virtual self, or digital embodiment of self found within an avatar. It was surmised that this new component of one’s overall identity not only existed in conjunction with the public and private persona, but was replete with the necessary physical and psychological characteristics that facilitate a broad range of cognitive, cultural, and socio-emotional outcomes found within a virtual environment (e.g., Second Life, World of Warcraft). However, little is known with regard to whether these characteristics do indeed impact behavioral outcomes. For this reason, this study employed an observational assessment method …

Co-Development Of Biological Soil Crusts, Soil-Geomorphology, And Landscape Biogeochemistry In The Mojave Desert, Nevada, U.S.A. – Implications For Ecological Management, Amanda Jean Williams

UNLV Theses, Dissertations, Professional Papers, and Capstones

Biological soil crusts (BSCs) are complex matrices of soil particles, mosses, lichens, and cyanobacteria that prevent erosion and influence water and energy balances, soil fertility, and vascular plant germination. The processes that form BSCs, the factors that control their distribution, and the ecosystem feedbacks that they sustain are poorly understood. This dissertation employed a novel interdisciplinary approach to address those research unknowns through investigations of the micromorphological structure, soil-geomorphic relationships, and biogeochemical feedbacks of BSCs in the Mojave Desert.

A micromorphological study of BSCs resulted in a succession model that illustrates how crust formative processes and structures change through time. …

The Right To Privacy In Light Of The Patriot Act And Social Contract Theory, Betsey Sue Casman

UNLV Theses, Dissertations, Professional Papers, and Capstones

There is a continual debate between individuals who attempt to measure the individual’s right to privacy against the government’s right to know in order to provide for the security of all citizens.

The questions that beg to be answered are whether the individual’s right to privacy outweighs the government’s duty to provide security; and if security is deemed more important, can there even be a right to privacy. It is critical to our nation’s anti-terrorism effort that our intelligence agencies possess the legal capacity to intercept all forms of communications utilized by terrorists and hostile intelligence agents. Inevitably this will …

The Hormonal Correlates Of Stress And Posttraumatic Stress Disorder Symptoms In Female Veterans, Meghan Pierce

UNLV Theses, Dissertations, Professional Papers, and Capstones

With the increase of female veterans serving in the military, a better understanding of posttraumatic stress disorder is needed to provide comprehensive treatment. This study examines salivary cortisol in female veterans with PTSD, female veterans without PTSD, civilian females with PTSD and healthy controls. The Posttraumatic Stress and Beck Depression Inventory-II were used to assess posttraumatic stress and depressive symptoms. Saliva samples were collected at bedtime and awakening, as well as in response to the Trier Social Stress Test. Significant results were not found for diurnal cortisol levels [ F (3, 11)= .979, p < .05] or stress cortisol levels (F (3,12) = 1.140, p >.05). …

Development Of A Scale To Assess Avoidance Behavior Due To A Fear Of Falling: The Fear Of Falling Avoidance Behavior Questionnaire (Ffabq), Cortney Durand, D. Shalom Powell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: A history of falls or imbalance may lead to a fear of falling which may lead to self-imposed avoidance of activity; this avoidance may stimulate a vicious cycle of deconditioning and subsequent falls.

Objective: The purpose of this study was to develop a questionnaire that would quantify avoidance behavior due to a fear of falling.

Design: This study consisted of two parts, questionnaire development and psychometric testing. Questionnaire development included an expert panel and 39 assisted living residents. Psychometric testing included 63 community dwelling subjects with various health conditions.

Methods: Questionnaire development included the evaluation …

Thrust Joint Manipulation Education: Student Perceptions Of Learning And Practical Experiences In Spinal Manipulation Within Entry-Level Physical Therapist Education Programs, Joshua Thomas Marks, Lisa Basl

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Spinal thrust joint manipulation (TJM) education is mandatory in all professional entry-level physical therapy programs, yet TJM is under-utilized in daily practice. This descriptive study expands on previous data about how TJM is taught and includes data for the perceived confidence students have when performing TJM.

Methods: A 39-question descriptive survey inquiring about TJM education and selfperceived confidence in performing TJM was distributed via email to 213 accredited physical therapy programs.

Subjects: Respondents ranged in age from 22-45 (mean age=25.61 years). Respondents included 435 professional physical therapy students (84 male, 285 female) who have completed their …

Effects Of Environment On Children's Motor Scores, Eligibility Status, And Administration Times, Derrick Mittelstadt, Abigail Parker, Kirsten Pickett, Heather Temkin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Best practices for assessing developmental skills in young children focus on naturalistic observation in everyday settings, but the effects of environment on test scores, eligibility status and administration time have not been explored. The Peabody Developmental Motor Scales-Second Edition (PDMS-2) was administered to 34 children aged 18 to 59 months in natural and pull-out settings. PDMS-2 total, gross, and fine motor quotient (TMQ, GMQ, and FMQ) scores were significantly lower in the natural environment (p’s≤.014). Based on our results, more children would qualify for services when tested in natural environments using TMQ and GMQ scores. It also took significantly longer …