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Relationships Between The Groundwaters Of Ash Meadows, Death Valley, Pahranagat Valley And The Nevada Test Site Based On Statistical Analysis And Modeling Of Trace Element Data, Sara Michelle Cox
UNLV Retrospective Theses & Dissertations
Relationships between the groundwaters of the Nevada Test Site, Ash Meadows, Pahranagat, and Death Valley have been studied by many people over many years. Using hydrogeochemical data from these areas (sampled and analyzed by the Harry Reid Center for Environmental Studies) hydrologic subbasins were classified on the basis of trace element concentrations and compare these to previous classification systems. In addition, previously suggested flow relationships were examined on the basis of trace element concentrations, in particular those elements which are thought to behave conservatively in oxidizing environments. These efforts were made with the aid of statistical analyses such as principal …
The Effect Of 5-Aminolevulinic Acid Based Photodynamic Therapy And Photochemical Internalization Of Bleomycin On The F98 Rat Glioma Cell Line, Khishigzaya Kharkhuu
The Effect Of 5-Aminolevulinic Acid Based Photodynamic Therapy And Photochemical Internalization Of Bleomycin On The F98 Rat Glioma Cell Line, Khishigzaya Kharkhuu
UNLV Retrospective Theses & Dissertations
The F98 rat glioma cell line, a model for human malignant glioma, was used to investigate the efficacy of 5-aminolevulinic acid (ALA)-mediated photodynamic therapy (PDT) under varying light irradiation conditions. Cells in monolayer were pre-incubated in ALA for 4 hours prior to 635 nm light exposure. Using clonogenic survival assays, it was found that F98 glioma cells were sensitive to ALA-PDT: survival was inversely proportional to light fluence. As evidenced from the LD50 (4 J cm-2 at a fluence rate of 35 mW cm-2), ALA-PDT was found to be more effective in F98 cells compared to that found in another …
Chemical Synthesis And Characterization Of Aniline Based Palladium Composites And Complexes, Jade Lorrayne Morgan
Chemical Synthesis And Characterization Of Aniline Based Palladium Composites And Complexes, Jade Lorrayne Morgan
UNLV Retrospective Theses & Dissertations
The chemical synthesis of aniline based palladium materials was achieved by the use of the chemical oxidants, PdCl4 2- and PdCl62-. Complex formation was favored by using aniline and polymer formation was favored by the use of n-phenyl-1,4-phenylenediamine (NPPD). All materials were prepared with or without acid. Also, Characterization techniques such as FTIR spectroscopy, UV-Vis spectroscopy, Scanning Electron Microscopy, Thermogravimetric Analysis and X-ray Photoelectron Spectroscopy were used; Hydrogen sorption studies were carried out using a GC/Hydrogen Generator. The aniline complexes had sorption properties up to 1.5% and the NPPD composites showed sorption up to 0.7%. It was found that the …
Xml-Based Implementation Of A Bibliographic Database And Recursive Queries, Kirankumar Jayakumar
Xml-Based Implementation Of A Bibliographic Database And Recursive Queries, Kirankumar Jayakumar
UNLV Retrospective Theses & Dissertations
Structured Query Language (SQL) of relational database model does not have the expressive power to implement recursive queries. Consequently, recursive queries are implemented as an application program in the host language. The newly developed XML schema provides a different setting for database design and query implementation; In this thesis, we design and implement an XML schema and a set of associated queries for a bibliographic database. We will investigate and demonstrate the shortcomings of both Xpath and Xquery as standard query languages for XML-based databases. We then show an efficient implementation of the recursive queries in XSLT programming language.
Study Of The Interaction Between Hydrogen And Carbon-Based Nanomaterials, Roberto Felix
Study Of The Interaction Between Hydrogen And Carbon-Based Nanomaterials, Roberto Felix
UNLV Retrospective Theses & Dissertations
Hydrogen is a promising energy carrier. Coupling hydrogen production to renewable energy sources would help alleviate the world's dependence on fossil fuels. A hurdle that must be overcome for that scenario is the development of satisfactory hydrogen storage media. Theoretical work suggests that carbon-based nanomaterials are plausible candidates; The research objective of this work is to study the influence of hydrogen adsorption on the chemical and electronic properties of carbon-based nanomaterials (i.e., single-walled carbon nanotubes and C60). An atomic hydrogen source was constructed. Nanomaterials were exposed to atomic and/or molecular hydrogen, and the local chemical and electronic interaction was studied …
Implementation Of Bma Based Motion Estimation Hardware Accelerator In Hdl, Nachiket Jugade
Implementation Of Bma Based Motion Estimation Hardware Accelerator In Hdl, Nachiket Jugade
UNLV Retrospective Theses & Dissertations
Motion Estimation in MPEG (Motion Pictures Experts Group) video is a temporal prediction technique. The basic principle of motion estimation is that in most cases, consecutive video frames will be similar except for changes induced by objects moving within the frames. Motion Estimation performs a comprehensive 2-dimensional spatial search for each luminance macroblock (16x16 pixel block). MPEG does not define how this search should be performed. This is a detail that the system designer can choose to implement in one of many possible ways. It is well known that a full, exhaustive search over a wide 2-dimensional area yields the …
Development Of A Gis-Based Safety Analysis System, Vidhya Kumaresan
Development Of A Gis-Based Safety Analysis System, Vidhya Kumaresan
UNLV Retrospective Theses & Dissertations
The objective of this study is to develop a safety analysis system that integrates crash data and roadway related information. This system is developed in a Geographic Information System (GIS) environment. It includes customized user interfaces to support queries to analyze data and to display results either in graphical or tabular formats. The system also affords the capabilities to export such results. The system permits analyses to be performed either at individual locations such as intersections, or for roadway segments. These analyses are based on data fields included in the crash database. The queries may be based on individual attributes …
Test Suite Prioritization Techniques Applied To Web-Based Applications, Vani Kandimalla
Test Suite Prioritization Techniques Applied To Web-Based Applications, Vani Kandimalla
UNLV Retrospective Theses & Dissertations
Web applications have rapidly gained importance in many businesses. The increased usage of web applications has created a challenging need for efficient and effective web application testing strategies. This thesis examines one aspect of web testing, that of test suite prioritization. We examine new test suite prioritization strategies that may improve the rate of fault detection for user-session based test suites. These techniques consider test-lengths and systematic coverage of parameter-values and their interactions. Experimental results show that some of these prioritization strategies often improve the rate of fault detection of test suites when compared to random ordering of the test …
A Cognitive -Behavioral -Based Workshop Intervention For Perfectionism, Marcus T Lasota
A Cognitive -Behavioral -Based Workshop Intervention For Perfectionism, Marcus T Lasota
UNLV Retrospective Theses & Dissertations
Perfectionistic thinking, attitudes, beliefs, and behaviors can have negative influences on mental and physical health. Overly rigid and self-critical perfectionistic thinking also complicates treatment for people seeking to alleviate mental health and medical concerns. Several researchers have offered suggestions for treating perfectionism, but no empirical treatment studies with follow-up results have been published. Only DiBartolo, Frost, Dixon, and Almodovar (2001) conducted a brief manipulation of public speaking fears related to concern over mistakes and employed a control group. The current study expanded the research literature with the creation and evaluation of a 3-hour cognitive-behavioral workshop for perfectionism. The results indicate …
Microscopic And Spectroscopic Studies Of Metal Deposition On Carbon-Based Materials, Ich C Tran
Microscopic And Spectroscopic Studies Of Metal Deposition On Carbon-Based Materials, Ich C Tran
UNLV Retrospective Theses & Dissertations
This dissertation is focused on studying the atomic and electronic structure of carbon-based materials, namely highly-ordered pyrolytic graphite (HOPG), single-walled carbon nanotubes (SWNT), and C60 fullerenes, with and without metal (Ti and Li) deposition. The work is motivated by ongoing efforts to understand and improve the hydrogen storage capability of carbon-based nanomaterials as well as their potential applications for developing novel electronic devices; Ti and Li deposition on the surface of SWNT, C60, and HOPG samples have been performed in ultra-high vacuum. The morphology and local geometric and electronic structure of the samples was investigated by scanning tunneling microscopy and …
Competency-Based Testing In Nevada: Perceptions Of Legislators, School District Superintendents, Local School Board Presidents And Third Grade Teachers, Nicholas J Horn
Competency-Based Testing In Nevada: Perceptions Of Legislators, School District Superintendents, Local School Board Presidents And Third Grade Teachers, Nicholas J Horn
UNLV Retrospective Theses & Dissertations
Purpose. The purpose of the study was to survey the opinions of four selected populations in Nevada in order to examine the aftermath of the 1977 Nevada Legislative action Assembly Bill 400 (AB400) which mandated competency based testing. The study's purpose is to see if the competency based t.
Cluster-Based Route Discovery Protocol, Shashirekha Yellenki
Cluster-Based Route Discovery Protocol, Shashirekha Yellenki
UNLV Retrospective Theses & Dissertations
An ad hoc network is a collection of wireless mobile hosts forming a network without the aid of any established infrastructure or centralized administration. In such an environment, it may be necessary for one mobile host to enlist the aid of other hosts in forwarding a packet to its destination due to the limited range of each mobile host's wireless transmissions. Many protocols have been proposed to route packets between the hosts in such a network; The on-demand routing protocol is a well-known method. It establishes the routes and uses them only when a need arises. For wireless communication channels, …
Content-Based Video Classification And Comparison, John Alexander Bunch
Content-Based Video Classification And Comparison, John Alexander Bunch
UNLV Retrospective Theses & Dissertations
Automatic video analysis tools have dramatically increased in importance as the Internet video revolution has blossomed. This thesis presents an approach for automatic comparison of videos based on the inherent content. Also, an approach for creating groups (or clusters) of similar videos from a large video database is given; First, methods simplifying and summarizing the content of videos will be presented. Such methods include shot boundary detection and key frame feature extraction; Next, a comparison of different distance measures between videos will be given. These distance measures will be used to construct video clusters, and results will be compared.
Video Based Vehicle Detection For Advance Warning Intelligent Transportation System, Naveen Chintalacheruvu
Video Based Vehicle Detection For Advance Warning Intelligent Transportation System, Naveen Chintalacheruvu
UNLV Retrospective Theses & Dissertations
Video based vehicle detection and surveillance technologies are an integral part of Intelligent Transportation System (ITS), due to its non-intrusiveness and capability or capturing global and specific vehicle behavior data. The initial goal of this thesis is to develop an efficient advance warning ITS system for detection of congestion at work zones and special events based on video detection. The goals accomplished by this thesis are: (1) successfully developed the advance warning ITS system using off-the-shelf components and, (2) Develop and evaluate an improved vehicle detection and tracking algorithm. The advance warning ITS system developed includes many off-the-shelf equipments like …
Design And Implementation Of Noc Routers And Their Application To Prdt-Based Noc's, Shankar Narayanan Neelakrishnan
Design And Implementation Of Noc Routers And Their Application To Prdt-Based Noc's, Shankar Narayanan Neelakrishnan
UNLV Retrospective Theses & Dissertations
With a communication-centric design style, Networks-on-Chips (NoCs) emerges as a new paradigm of Systems-on-Chips (SoCs) to overcome the limitations of bus-based communication infrastructure. An important problem in the design of NoCs is the router design, which has great impact on the cost and performance of a NoC system. This thesis is focused on the design and implementation of an optimized parameterized router which can be applied in mesh/torus-based and Perfect Recursive Diagonal Torus (PRDT)-based NoCs; In specific, the router design includes the design and implementation of two routing algorithms (vector routing and circular coded vector routing), the wormhole switching scheme, …
Navigating Through "Our Bumps On The Road To Reading": A Multi-Case Analysis Of How Literature -Based Response Experiences Inform And Influence Pre -Service Teachers' Reading Perceptions, Christine A Draper
UNLV Retrospective Theses & Dissertations
The purpose of the study was to present multiple perspectives (multi-case design) that define pre-service teachers reading perceptions. This study sought to understand prior experiences that defined pre-service teachers' reading perceptions and to understand how response-based explorations in a children's literature course informed and influenced their existing perceptions of reaDing This study employed a qualitative methodology and was framed by reader response, teacher knowledge and preparation literature, and a socio-constructivist perspective. Data sources included pre- and post-course interviews, course assignments, participant's reflection journals, and researcher's log with analytical memos. Open and axial coding as described by Strauss and Corbin (1998) …
An Arima-Model-Based Approach With Hazard Area For The Probability Of Volcanic Disruption Of The Proposed High-Level Radioactive Waste Repositiory At Yucca Mountain, Nevada, Usa, Xiaojuan Liu
UNLV Retrospective Theses & Dissertations
An interesting extension of advanced time-series analysis techniques is introduced into the domain of volcanological data exploration. A new and innovative use of the well-known ARIMA method for modeling the recurrence rate of volcanism ranging from simple Poissonian volcanoes to those showing cyclic trends is presented. Specifically, we propose a new tool to fingerprint the eruptive behavior of a volcano, which also links some modeling tools of two of the most developed areas in the literature of statistics: stochastic processes and time series. Valuable modeling and computing insights are discussed using a data set from the volcanic database at Yucca …
Security Protocol Based On Random Key Generation For An Rfid System, Karthik Raghavan
Security Protocol Based On Random Key Generation For An Rfid System, Karthik Raghavan
UNLV Retrospective Theses & Dissertations
Radio Frequency Identification (RFID) is a technology, which describes the transmission of unique information by a wireless device, over Radio waves, when prompted or read by a compatible reader; The basic components in implementing RFID are RFID tags which are small microchips attached to a radio antenna, mounted on a substrate, and a wireless transceiver/reader that queries the RFID tags; This thesis deals with research issues related to security aspects in the communication between an RFID tag and its reader. More precisely, it deals with a new, simple and efficient security protocol based on an encryption that uses the concept …
Literature Based Discovery: Techniques And Tools, Ramalakshmi Sundar
Literature Based Discovery: Techniques And Tools, Ramalakshmi Sundar
UNLV Retrospective Theses & Dissertations
Literature Based Discovery (LBD) was initially proposed by Don R. Swanson in 1980 as a method to establish relationships between disease and remedy from disjoint science literature. Consequently, he established a link between magnesium and migraines. Since then literature based discovery has been a subject of research and development for discovery in online medical publications. It has further been investigated in both chemistry and mathematics; In this thesis, we give an overview of LBD and the software tools necessary to automate this technique. We further provide an implementation of this technique that is intended to be used for computer science …
Multidimensional Model Of Destination Brands: An Application Of Customer -Based Brand Equity, Soyoung Boo
Multidimensional Model Of Destination Brands: An Application Of Customer -Based Brand Equity, Soyoung Boo
UNLV Retrospective Theses & Dissertations
Branding's extension into tourism destination management is expanDing However, most studies to date have focused at the conceptual exploration level or expansion of image-level theory. This study examined empirical information on building the destination brand model through a scale purification process, ensuring its reliability and validity. The customer-based brand equity measurement model from the general marketing literature was applied in a destination context. The proposed model was tested with an online survey sample of Las Vegas and Atlantic City visitors because both destinations are in a similar destination brand category. Findings show that although the proposed model showed a good …
The Impact Of Computer-Based Interventions With And Without Primary Language Support On Reading Skills Of English Language Learners, Catherine M Draper Rodriguez
The Impact Of Computer-Based Interventions With And Without Primary Language Support On Reading Skills Of English Language Learners, Catherine M Draper Rodriguez
UNLV Retrospective Theses & Dissertations
Reading is the most important skill that English Language (EL) learners acquire in school (Slavin & Cheung, 2005). Success in reading has been shown to impact many areas of student social and economic opportunities (Peregoy & Boyle, 2005). Students who come to school with limited English proficiency have greater difficulty learning to read in English (Freeman & Freeman, 2004). With the rise in the number of EL learning students in schools, school districts are compelled to find ways to teach English literacy skills to students with primary languages other than English; This study had two purposes. The first purpose was …
Hellfire And Damnation Through Crime Or Bliss Through Faith: A Look At Faith-Based Corrections, Gregory Paul Warren Wuthrich
Hellfire And Damnation Through Crime Or Bliss Through Faith: A Look At Faith-Based Corrections, Gregory Paul Warren Wuthrich
UNLV Retrospective Theses & Dissertations
The latest movement in trying to combat the U.S. crime problem is through "faith-based" corrections. These programs are in the infancy stages and minimal data are present at this time to illustrate true effectiveness of such programs. This study is a theoretical evaluation of such programs and incorporates a framework from Gary LaFree (1988). Results indicate that "faith-based" programs tend to be one dimensional and in order for them to work properly they must be set up in conjunction with other institutional changes. Often other theories can incorporate the dimension of religion, yet religion alone, such as through "faith-based" programs, …
A Label Based Routing Protocol For Wireless Sensor Networks, Naoto Kimura
A Label Based Routing Protocol For Wireless Sensor Networks, Naoto Kimura
UNLV Retrospective Theses & Dissertations
One of the challenging issues in wireless sensor networks is to acquire, process, and transmit information using the least amount of battery power; In response to this problem, a novel routing scheme for wireless sensor networks, called "Information Dissemination via Label Forwarding (IDLF)", is presented. IDLF consists of three information exchanging stages. In the first stage, a label is disseminated by a source. After a sink receives the label, it replies a request to the source. By exchanging a label and request, a data path between a source and sink is formed. Finally, an actual data is transmitted through the …
Design And Implementation Of A Fast Fourier Transform Architecture Using Twiddle Factor Based Decomposition Algorithm, Bhaarath Kumar
Design And Implementation Of A Fast Fourier Transform Architecture Using Twiddle Factor Based Decomposition Algorithm, Bhaarath Kumar
UNLV Retrospective Theses & Dissertations
With the advent of signal processing and wireless communication mobile platform devices, the necessity for data transformation from one form to another becomes an unavoidable aspect. One such mathematical tool that is widely used for transforming time and frequency domain signals is Fourier Transform. Fast Fourier Transform (FFT) is perhaps the fastest way to achieve transformation. Many algorithms and architectures have been designed over the years in an attempt to make FFT algorithms more efficient and to target many applications; The main objective of our work is to design, simulate and implement an architecture based on the Twiddle-Factor-Based decomposition FFT …
Non-Lithographic Fabrication Of Nickel Based Antidot System For Potential Gmr Device Applications, Saurabh Amitabha Mookerjea
Non-Lithographic Fabrication Of Nickel Based Antidot System For Potential Gmr Device Applications, Saurabh Amitabha Mookerjea
UNLV Retrospective Theses & Dissertations
The antidot system is an interesting material for applications in GMR (Giant Magnetoresistance) device technology. Such devices have been the subject of investigation for its physics during the past fifteen years; however there has not been any focus towards application in GMR technology. The objective of this thesis is to develop a optimum device configuration as well as process technology for GMR applications of antidot structures. This thesis describes two different non-lithographic techniques for the fabrication of nickel based antidot systems. The first technique uses an alumina template as a mask to etch holes on the underneath nickel. Preliminary data …
A Gis Based Tool To Determine Optimal Routes, Rajeev Naroor
A Gis Based Tool To Determine Optimal Routes, Rajeev Naroor
UNLV Retrospective Theses & Dissertations
Travel in urban and suburban areas is an important activity in an individual's daily time budget. Each trip is preceded by a planning process for selecting a "desirable" or an optimal route from the origin to destination. "Optimal" can take many forms, such as shortest time, shortest distance, least total cost, or safest/most reliable path. Reliable paths are of interest because of the impacts of congestion on travel tomes, and the resultant variability in travel times. A model to help identify optimal travel paths based on travel time variability is developed in this research; Congestion on streets is one of …
Study On Immobilizing Radionuclides In Apatite-Based Host Phase Materials, Gunanda Weduge Chinthaka Silva
Study On Immobilizing Radionuclides In Apatite-Based Host Phase Materials, Gunanda Weduge Chinthaka Silva
UNLV Retrospective Theses & Dissertations
Fluorapatite is well known for its properties such as high thermal stability, chemical durability and its resistibility to radiation damage. These properties have been taken into account when it was considered as waste form material for fluoride salts like Cs, Sr and rare earths. The research as described in this thesis was carried out in order to determine the feasibility of incorporating other elements into fluorapatite as surrogate for nuclear waste without affecting any of its properties, especially the thermal stability. The aim was to accomplish incorporations in a way so that some of the calcium ions in the fluorapatite …
Design Of Fuzzy Logic Based Adaptive Traffic Signal Controller, Murali Mohan Ande
Design Of Fuzzy Logic Based Adaptive Traffic Signal Controller, Murali Mohan Ande
UNLV Retrospective Theses & Dissertations
Traffic control of street intersections is one of the most critical elements in providing an efficient flow of traffic in urban networks. Conventionally, pretimed controllers are used, but they cannot respond to real time fluctuations in traffic demand. Traffic actuated signals provide an improvement over pretimed controllers, but their performance deteriorates under heavy traffic conditions. These conditions necessitate the development of a controller that responds to actual traffic demand in real time, with the objective of minimizing vehicle delays, number of stops, etc. Fuzzy logic provides the potential for development of a system that would address these needs; The objective …
Handwritten Character Recognition Using A Gradient Based Feature Extraction, Ravi Kiran Reddy Veligati
Handwritten Character Recognition Using A Gradient Based Feature Extraction, Ravi Kiran Reddy Veligati
UNLV Retrospective Theses & Dissertations
Handwriting Recognition is the task of transforming a language that is represented in its spatial form of graphical marks into its symbolic representation. In Offline Handwriting Recognition, there are three steps: preprocessing of the image, segmentation of words into characters and recognition of the characters. In this thesis I implemented two methods for character recognition, which is the most important step in Offline Handwriting Recognition. The heart of character recognition is the features that are extracted from the character image. The accuracy of the classification of the character image depends on the quality of the features extracted from the image. …
The Faith Community Response To The Bush Administrations Faith-Based Initiatives, Thomas Clark Wilson
The Faith Community Response To The Bush Administrations Faith-Based Initiatives, Thomas Clark Wilson
UNLV Retrospective Theses & Dissertations
Since George W. Bush won the presidency in 2000 one of his top domestic priorities has been to elevate the role of religion in America. He is attempting to correct a perceived wrong that the federal government has hindered religious group's ability to compete on a level playing field with secular groups in acquiring funds for social service programs. Bush believes that faith-based groups hold the answer for healing society's ills. As a result his administration has set up The White House Office Of Faith-based and Community Initiatives to accomplish the goal of a more faith friendly public square; Theological, …