Digital Commons Network^™

Community Perspectives On Black Parent Engagement In West Las Vegas Before And After Desegregation: A Case Study, Tonia Faye Holmes-Sutton

UNLV Theses, Dissertations, Professional Papers, and Capstones

According to research on parent engagement in K-12 schools, disconnects often exist between parent involvement as defined by school leaders and the African American families and communities they serve (Delgado-Gaitan, 1991; Tillman, 2009). Unfortunately, these competing definitions and conceptions of parent involvement often result in school leaders and administrators perceiving that Black students do not achieve as well as their White peers because Black parents are not involved or engaged in the education of their children (Cooper, 2010; Cooper, 2009; Fields-Smith, 2005). This perception undermines the development of positive home-school relations between school leaders, educators, and Black parents, and in …

Synthesis And Characterizations Of Pyridinium Salts Including Poly(Pyridinium Salt)S And Their Applications, Tae Soo Jo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Pyridinium salts, both molecular and polymeric, are an interesting class of multifunctional materials that exhibit liquid-crystalline and light-emitting properties. Moreover, their properties can be easily tuned by introducing new types of anions or by modifying their chemical structures. This dissertation describes synthesis and characterization of poly(pyridinium salt)s containing macrocounterions and fluorene moieties in their backbones, synthesis and characterization of nanocomposites of poly(pyridinium salt)s with single-walled carbon nanotubes via non-covalent interactions, and synthesis and characterizations of pyridinium salts having different aliphatic linkages and their application in organic acid sensing.

First, all of these ionic polymers were prepared by either ring-transmutation or …

Novel Production Techniques Of Radioisotopes Using Electron Accelerators, Daniel Robert Lowe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Non-traditional radioisotope production techniques using a compact, high power linear electron accelerator have been demonstrated and characterized for the production of 18F, 47Sc, 147Pm, and 99mTc from a variety of target candidates. These isotopes are used extensively in the medical field as diagnostic and therapy radioisotopes, as well as the space industry as RTG's. Primary focus was placed on 99mTc as it constitutes approximately 80% of all diagnostic procedures in the medical community that use radioactive tracers. It was also the prime focus due to recent events at the Chalk River nuclear reactor, which caused global shortages of this isotope …

Post Processing Of Optically Recognized Text Using First Order Hidden Markov Model, Spandana Malreddy

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this thesis, we report on our design and implementation of a post processing system for Optically Recognized text. The system is based on first order Hidden Markov Model (HMM). The Maximum Likelihood algorithm is used to train the system with over 150 thousand characters. The system is also tested on a file containing 5688 characters. The percentage of errors detected and corrected is 11.76% with a recall of 10.16% and precision of 100%

A Case Study Using Principal-Agent Theory To Explore How A Public, Four Year University Interacts With A System Office, Annie Macias

UNLV Theses, Dissertations, Professional Papers, and Capstones

The focus of this research was to examine the funding relationship between a single public institution of higher education and its accompanying system office. Such a study is important in order to obtain insight into the relationship between a System Office and an institution, and thus how institutions carry out their fiscal responsibilities, not directly to the state but to the System Office they serve. The study provides insight into how the System Office communicates and transacts with an institution regarding financial allocations. Also important is whether that institution receives effective communication and whether the institution's perceived expectations are as …

A Study Of District Leadership Practices In The Principal Professional Learning Community, Danielle Grace Miller

UNLV Theses, Dissertations, Professional Papers, and Capstones

This qualitative study was implemented in an urban, Title I school district in the southern portion of the United States. The problem the study addressed was that the various phenomena pertaining to the implementation of the principal professional learning community (PPLC), as perceived by the 14 participating elementary school principals, had not been examined to determine their influence. Qualitative data were acquired from the principals through personal interviews.

Findings suggested that, with the regular opportunities for principals to share ideas and thoughts with their colleagues, PPLC participants perceived improved performance involving (a) the attributes of high skillfulness and high participation …

The Impact Of Creosote Bush (Larrea Tridentata) And Biological Soil Crust On Ca Distribution In Arid Soils Of The Mojave Desert, Brittany Myers

UNLV Theses, Dissertations, Professional Papers, and Capstones

Ca is an important nutrient that plays a role in membrane stability and cell repair in plant life. This study examines the impact of creosote bush (Larrea tridentata) and biological soil crust on calcium cycling and distribution in desert soils in order to explore the use of Ca as a biosignature. Samples of creosote bush, biological soil crust and eolian dust were taken at two field sites in the Mojave Desert. The first site is located in Eldorado Valley, NV, a soil formed on a young (800-1200 years) alluvial fan deposit; the second site is located on a late Holocene-aged …

The Impact Of Advanced Wastewater Treatment Technologies And Wastewater Strength On The Energy Consumption Of Large Wastewater Treatment Plants, Timothy Stephen Newell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Wastewater treatment is an energy intensive process often requiring the use of advanced treatment technologies. Stricter effluent standards have resulted in an increase in the number of wastewater treatment plants (WWTPs) with advanced treatment over time. Accordingly, associated energy consumption has also increased. Concerns about lowering operating costs for WWTPs and reducing associated greenhouse gas generation present an incentive to investigate energy use in WWTPs. This research investigated the impact of wastewater strength and the introduction of advanced treatment technologies, to replace traditional technologies on energy use to treat wastewater in WWTPs. Major unit processes were designed for a 100 …

Recycling And Reuse Of Radioactive Materials, Thomas Joseph O'Dou

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Radiochemistry Program at the University of Nevada, Las Vegas (UNLV) has a Radiation Protection Program that was designed to provide students with the ability to safely work with radioactive materials in quantities that are not available in other academic environments. Requirements for continuous training and supervision make this unique program capable of turning out graduates that have an understanding of contamination and dose control techniques that complement their knowledge of the elements that they work with. The Program has also adopted a radionuclide recovery and reuse program that has provided materials from other universities, government agencies, and private companies …

2000 Year Moisture Source Record From A Central Nevada Speleothem, Paul Pribyl

UNLV Theses, Dissertations, Professional Papers, and Capstones

The goal of this study was to determine the moisture source of winter precipitation in the central Great Basin for the past 2000 years, and to elucidate the role of Pacific Ocean and North American climate variability modes in driving observed droughts of the region around the Medieval Climatic Anomaly (MCA, ~900-1300 CE). Here a high resolution (~2-4 year) precisely dated moisture source reconstruction is presented from the δ18O values of speleothem LC-1 collected from Leviathan Cave in central Nevada, which reveals significant δ18O variability. I attribute the δ18O variability to changes in winter-season moisture circulation over the past 2000 …

Image Segmentation For Quantification Of Air-Water Interface In Micro-Ct Soil Images, Kranthi Kumar Potteti

UNLV Theses, Dissertations, Professional Papers, and Capstones

Soils are complex environments comprising various biological (roots, water, air etc) and physical constituents (minerals, aggregates, etc). Synchrotron radiation based X-ray microtomography (XMT) is widely used in extracting qualitative and quantitative information regarding spatial distribution of biological and physical soil constituents. Segmentation of these micro-CT soil images is of interest to geologists, hydrologists, civil and petroleum engineers and soil scientists. In this present work, we study and implement segmentation algorithms for microhydrology studies, specifically for soil water conductivity. Three well-known image segmentation algorithms are studied for evaluating their performance for the task. We demonstrate the problems and ways to segment …

An Exploration Of Contextual Factors That May Influence The Expulsion Rates Of Middle School Students, Tracy Schroeder

UNLV Theses, Dissertations, Professional Papers, and Capstones

On March 6, 2012, the New York Times released an article in the education section describing a study by the Department of Education Office of Civil Rights. The study showed that the education system continues to create inequities for minority students. In particular, according to the Office of Civil Rights, Black students made up 18% of the sample size, yet 35% were suspended once and 39% were expelled (U.S. Department of Education, 2012). In a review of the literature, the statistics of the discipline inequities that minorities face became a recurring theme. However, very little research explored other factors that …

Credentialing Success In Respiratory Therapy Education: Revisiting Bourdieu's Concepts Of Field And Capital, Karen Lightbody Shaw

UNLV Theses, Dissertations, Professional Papers, and Capstones

The field of Respiratory Therapy (RT) is expected to experience a workforce shortfall over the next decade. The numbers of both program applicants and graduates have declined in recent years, necessitating strategies to improve board exam pass rates for future graduates. In response to the pending employment crisis, the Commission on Accreditation for Respiratory Care has published Programmatic Outcomes Data detailing individual program statistics. A theoretical framework adapted from Pierre Bourdieu's Concepts of Field and Capital was proposed to explain a possible re-stratification of RT programs. It states, in part, that a modification of position-takings within the RT educational field …

Division I Student-Athlete Degree Choice Assessment, Tony Terrell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Though the NCAA has established rules that require student-athletes to complete their college degree in an expeditious manner, the 40/60/80% rule may impinge on student-athlete academic decisions (i.e., degree choice).Yet limited empirical data exist regarding the nature and prevalence of student-athlete degree impingement. The purpose of this study was to develop and validate the Student-Athlete Degree Choice Questionnaire (SA-DCQ). The SA-DCQ assesses factors that influence Division I student-athletes' degree choice. An initial 40 item, 4 component SA-DCQ instrument was piloted with 170 Division I student-athletes. In order to develop scales, Principal Components Analysis (PCA) was conducted. PCA results yielded 13 …

Investigating The Impacts Of Conventional And Advanced Treatment Technologies On Energy Consumption At Satellite Water Reuse Plants, Jonathan Roy Bailey

UNLV Theses, Dissertations, Professional Papers, and Capstones

With the ever increasing world population and the resulting increase in industrialization and agricultural practices, depletion of two of the world's most important natural resources, water and fossil fuels, is inevitable. Water reclamation and reuse is the key to protecting these natural resources. Water reclamation using smaller decentralized wastewater treatment plants, known as satellite water reuse plants (WRP), have become popular in the last decade. With stricter standards and regulations on effluent quality and requirements for a smaller land footprint (i.e. real estate area), additional treatment processes and advanced technologies are needed. This greatly increases the energy consumption of an …

Leading Transformational Change In A Large Urban School District, Leslie Jean Brinks

UNLV Theses, Dissertations, Professional Papers, and Capstones

This abstract reflects the findings of the understanding of the skills necessary to lead transformative change in a non-affluent neighborhood in a large urban district. Current research and understandings of transformative leadership has been limited to traits and organizational concepts rather than the work associated with transforming schools. Studies seldom addressed if leaders even valued the actions central to transformative work or if they have the capacity and expertise to do the task. The purpose of this study was to understand the kinds of knowledge, skills, and dispositions that support what is viewed as transformative leading. Additionally the inquiry probed …

Understanding Adolescent Perceptions Of Science Education, Ellen Kress Ebert

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study used the Relevance of Science Education (ROSE) survey (Sjoberg & Schreiner, 2004) to examine topics of interest and perspectives of secondary science students in a large school district in the southwestern U.S. A situated learning perspective was used to frame the project. The research questions of this study focused on (a) perceptions students have about themselves and their science classroom and how these beliefs may influence their participation in the community of practice of science; (b) consideration of how a future science classroom where the curriculum is framed by the Next Generation Science Standards might foster students' beliefs …

Volcanic Evolution Of The Southern Quinn Canyon Range: Implications For Regional Correlation Of Volcanic Units, Christina Emery

UNLV Theses, Dissertations, Professional Papers, and Capstones

The southern Quinn Canyon Range lies in an area of the Great Basin subjected to large-volume Oligocene-Miocene silicic volcanism and smaller volume basaltic volcanism during the Pliocene. Three major ash-flow tuff units were correlated in the southern Quinn Canyon Range (the Pahranagat Tuff, Clifford Spring Tuff, and the Cow Canyon Tuff) with regional units by utilizing U/Pb and 40 Ar/ 39Ar geochronology, geochemical correlation, and field mapping. Isotopic analysis suggests that basalt in the southern Quinn Canyon Range is part of the Death Valley-Pancake Range Basalt Zone and is similar to Reveille Range Episode 1 and 2 basalts. Further comparison …

Comparison And Simulation Of Salt-Ceramic Composites For Use In High Temperature Concentrated Solar Power, Lauren Michelle Fossile

UNLV Theses, Dissertations, Professional Papers, and Capstones

Due to the inherently intermittent nature of solar energy caused by cloud cover among other sources, thermal storage systems are needed to make solar energy more consistent. This same technology could be used to prolong the daily number of useful hours of solar energy power plants. Salt-ceramic materials are a relatively new prospect for heat storage, but have been researched mostly with magnesium oxide and several different carbonate salts. Salt ceramics are a phase change material where the salt changes phase inside the ceramic structure allowing for the system to use the sensible heat of both materials and the latent …

Anti-Germinants As A New Strategy To Prevent Clostridium Difficile Infections, Amber Janece Howerton

UNLV Theses, Dissertations, Professional Papers, and Capstones

Clostridium difficileinfections (CDI) have emerged as a leading cause of hospital-associated complications. CDI is the major cause of antibiotic-related cases of diarrhea and nearly all cases of pseudomembranous colitis. The infective form of C. difficileis the spore, a dormant and hardy structure that forms under stress. Germination of C. difficile spores into toxin producing bacteria in the GI tract of susceptible patients is the first step in CDI establishment. Patient susceptibility occurs with a disruption of the natural gut microbiota by broad-spectrum antibiotics. Antibiotic treatments usually resolve CDI but refractory cases are on the rise. Of great concern is the …

A Forensic Identification Utility To Create Facial Approximations Using Cone-Beam Computed Tomography Of 100 Hispanic Females: A Pilot Study, Behzad Nejat

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction:Estimation of facial soft tissue appearance from human skeletal remains is often necessary in forensic identification. This process has been referred to as facial reconstruction or facial approximation and is a branch of forensic facial anthropology. Original methods for facial approximation originated in nineteenth century Europe and consisted of artists shaping clay over skull models using average soft tissue depths measured in cadavers. The last two decades have introduced numerous computerized techniques that have digitized this process while attempting to accurately and objectively define the relationship between a skull and its overlying soft tissue. This pilot study describes a method …

Molecular Forensic Science Analysis Of Nuclear Materials, Dallas Reilly

UNLV Theses, Dissertations, Professional Papers, and Capstones

Concerns over the proliferation and instances of nuclear material in the environment have increased interest in the expansion of nuclear forensics analysis and attribution programs. A new related field, molecular forensic science (MFS) has helped meet this expansion by applying common scientific analyses to nuclear forensics scenarios. In this work, MFS was applied to three scenarios related to nuclear forensics analysis. In the first, uranium dioxide was synthesized and aged at four sets of static environmental conditions and studied for changes in chemical speciation. The second highlighted the importance of bulk versus particle characterizations by analyzing a heterogeneous industrially prepared …

Detrital Carbonates In A Sequence Stratigraphic Framework: An Example From The Furongian Slope Environment In The Hot Creek Range Of Central Nevada, Leon Taufani

UNLV Theses, Dissertations, Professional Papers, and Capstones

An integrated sedimentological study of detrital carbonates of the late Cambrian (Furongian) Hales Limestone in central Nevada was conducted in order to model facies distribution and controlling mechanisms of carbonate gravity-flow deposits. Seven closely-spaced sections and numerous traceable short sections were measured to investigate temporal and spatial changes of detrital carbonates within a high-resolution stratigraphic framework supported by biostratigraphic and carbon isotope chemostratigraphic constraints and by key physical surfaces. Polished slabs and thin section petrographic analysis were used to identify micro- and macro-scale textures and diagenesis.

Ten lithofacies are identified from the Hales Limestone. Lateral tracing of these facies reveals …

Tribute - Eugene M. Christiansen, Eugene M. Christiansen

UNLV Gaming Research & Review Journal

No abstract provided.

A Career Achievement, Suzan Dibella

UNLV Innovation

Meet several UNLV recipients of the National Science Foundation’s prestigious CAREER Award, the highly competitive grant designed to establish leadership in education and research.

- Brian Hedlund

- Jennifer Rennels

- Dong-Chan Lee

- Frank van Breukelen

- Sajjad Ahmad

Climate Change And International Trade: Conflict Or Opportunity?, Joshua Meltzer

Brookings Scholar Lecture Series

How can international trade negotiations provide incentives or limit progress on domestic and international climate change policy? This presentation will explore how trade negotiations can reduce trade barriers to low carbon produced goods, the implications of the World Trade Organization (WTO) and free trade agreements, and how pricing carbon to reduce greenhouse gas emissions can lead to international competitiveness and carbon leakage concerns. This presentation will consider the implications of the November 6th election on short and long-term climate policy initiatives.

Linked Data Demystified: Practical Efforts To Transform Contentdm Metadata For The Linked Data Cloud, Silvia B. Southwick, Cory K. Lampert

Library Faculty Presentations

The library literature and events like the ALA Annual Conference have been inundated with presentations and articles on linked data. At UNLV Libraries, we understand the importance of linked data in helping to better service our users. We have designed and initiated a pilot project to apply linked data concepts to the practical task of transforming a sample set of our CONTENTdm digital collections data into future-oriented linked data. This presentation will outline rationale for beginning work in linked data and detail the phases we will undertake in the proof of concept project. We hope through this research experiment to …

Reflections: Insights From Studying Gambling In Its Era Of Change: What The Past 43 Years Have Been About, William R. Eadington

UNLV Gaming Research & Review Journal

The following presentation was delivered on October 14, 2012 to the graduating class at the 2012 UNR Executive Development Program in Lake Tahoe, Nevada.

Tribute - Jeffrey J. Marotta, Jeffrey J. Marotta

UNLV Gaming Research & Review Journal

No abstract provided.

Tribute - Sudhir H. Kale, Sudhir H. Kale

UNLV Gaming Research & Review Journal

No abstract provided.