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Logic Programming Tools for Dynamic Content Generation and Internet Data Mining

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The phenomenal growth of Information Technology requires us to elicit, store and maintain huge volumes of data. Analyzing this data for various purposes is becoming increasingly important. Data mining consists of applying data analysis and discovery algorithms that under acceptable computational efficiency limitations, produce a particular enumeration of patterns over the data. We present two techniques based on using Logic programming tools for data mining. Data mining analyzes data by extracting patterns which describe its structure and discovers co-relations in the form of rules. We distinguish analysis methods as visual and non-visual and present one application of each. We explain that our focus on the field of Logic Programming makes some of the very complex tasks related to Web based data mining and dynamic content generation, simple and easy to implement in a uniform framework.
Date: December 2000
Creator: Gupta, Anima
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Spatial Partitioning Algorithms for Solving Location-Allocation Problems

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This dissertation presents spatial partitioning algorithms to solve location-allocation problems. Location-allocations problems pertain to both the selection of facilities to serve demand at demand points and the assignment of demand points to the selected or known facilities. In the first part of this dissertation, we focus on the well known and well-researched location-allocation problem, the "p-median problem", which is a distance-based location-allocation problem that involves selection and allocation of p facilities for n demand points. We evaluate the performance of existing p-median heuristic algorithms and investigate the impact of the scale of the problem, and the spatial distribution of demand points on the performance of these algorithms. Based on the results from this comparative study, we present guidelines for location analysts to aid them in selecting the best heuristic and corresponding parameters depending on the problem at hand. Additionally, we found that existing heuristic algorithms are not suitable for solving large-scale p-median problems in a reasonable amount of time. We present a density-based decomposition methodology to solve large-scale p-median problems efficiently. This algorithm identifies dense clusters in the region and uses a MapReduce procedure to select facilities in the clustered regions independently and combine the solutions from the subproblems. Lastly, …
Date: December 2019
Creator: Gwalani, Harsha
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Brownian Movement and Quantum Computers

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This problem in lieu of thesis is a discussion of two topics: Brownian movement and quantum computers. Brownian movement is a physical phenomenon in which the particle velocity is constantly undergoing random fluctuations. Chapters 2, 3 and 4, describe Brownian motion from three different perspectives. The next four chapters are devoted to the subject of quantum computers, which are the signal of a new era of technology and science combined together. In the first chapter I present to a reader the two topics of my problem in lieu of thesis. In the second chapter I explain the idea of Brownian motion, its interpretation as a stochastic process and I find its distribution function. The next chapter illustrates the probabilistic picture of Brownian motion, where the statistical averages over trajectories are related to the probability distribution function. Chapter 4 shows how to derive the Langevin equation, introduced in chapter 1, using a Hamiltonian picture of a bath with infinite number of harmonic oscillators. The chapter 5 explains how the idea of quantum computers was developed and how step-by-step all the puzzles for the field of quantum computers were created. The next chapter, chapter 6, discus the basic quantum unit of information …
Date: December 2004
Creator: Habel, Agnieszka
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Layered Double Hydroxides: Morphology, Interlayer Anion, and the Origins of Life

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The preparation of layered double hydroxides via co-precipitation of a divalent/trivalent metal solution against a base results in 1 mm LDH particles with a disorganized metal lattice. Research was performed to address these morphological issues using techniques such as Ostwald ripening and precipitation via aluminate. Another interesting issue in layered double hydroxide materials is the uptake and orientation of anions into the interlayer. Questions about iron cyanide interlayer anions have been posed. Fourier transform infared spectroscopy and powder x-ray diffraction have been used to investigate these topics. It was found that factors such as orientation, anion charge, and anion structure depended on the divalent/trivalent metal ratio of the hydroxide layer and reactivity time. The cyanide self-addition reaction is an important reaction of classical prebiotic chemistry. This reaction has been shown to give rise to amino acids, purines and pyrimidines. At cyanide concentrations similar to that expected on the early earth, hydrolysis to formamide rather than self-addition occurs. One theory to alleviate this side reaction is the use of minerals or clays that are thought to concentrate and catalyze prebiotics of interest. Layered double hydroxides have been studied as a catalyst for this reaction.
Date: December 2002
Creator: Halcom-Yarberry, Faith Marie
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Faculty Recital: 2009-12-02 - Christoph Hammer, fortepiano

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Faculty lecture recital performed at the UNT College of Music Recital Hall.
Date: December 2, 2009
Creator: Hammer, Christoph
Object Type: Sound
System: The UNT Digital Library

Richard Thompson Archer and the Burdens of Proprietorship: The Life of a Natchez District Planter

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In 1824 a young Virginia aristocrat named Richard Thompson Archer migrated to Mississippi. Joining in the boom years of expansion in the Magnolia State in the 1830s, Archer built a vast cotton empire. He and his wife, Ann Barnes, raised a large family at Anchuca, their home plantation in Claiborne County, Mississippi. From there Richard Archer ruled a domain that included more than 500 slaves and 13,000 acres of land. On the eve of the Civil War he was one of the wealthiest men in the South. This work examines the life of Richard Archer from his origins in Amelia County, Virginia, to his death in Mississippi in 1867. It takes as its thesis the theme of Archer's life: his burdens as proprietor of a vast cotton empire and as father figure and provider for a large extended family. This theme weaves together the strands of Archer's life, including his rise to the position of great planter, his duties as husband and father, and his political beliefs and activities. Archer's story is told against the background of the history of Mississippi and of the South, from their antebellum heyday, through the Civil War, and into the early years of Reconstruction. …
Date: December 2001
Creator: Hammond, Carol D.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

A Netcentric Scientific Research Repository

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The Internet and networks in general have become essential tools for disseminating in-formation. Search engines have become the predominant means of finding information on the Web and all other data repositories, including local resources. Domain scientists regularly acquire and analyze images generated by equipment such as microscopes and cameras, resulting in complex image files that need to be managed in a convenient manner. This type of integrated environment has been recently termed a netcentric sci-entific research repository. I developed a number of data manipulation tools that allow researchers to manage their information more effectively in a netcentric environment. The specific contributions are: (1) A unique interface for management of data including files and relational databases. A wrapper for relational databases was developed so that the data can be indexed and searched using traditional search engines. This approach allows data in databases to be searched with the same interface as other data. Fur-thermore, this approach makes it easier for scientists to work with their data if they are not familiar with SQL. (2) A Web services based architecture for integrating analysis op-erations into a repository. This technique allows the system to leverage the large num-ber of existing tools by wrapping them …
Date: December 2006
Creator: Harrington, Brian
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Nano-Manufacturing of Catalytic Amorphous Alloys

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In this dissertation, nano-manufacturing of amorphous alloys for electro-catalytic applications is reported and the role of chemistry and active surface area on catalytic behavior is discussed. The catalytic activity of recently developed platinum and palladium-based metallic glasses was studied using cyclic voltammetry and localized electrochemical techniques. The synergistic effect between platinum and palladium was shown for amorphous alloys containing both these elements. The mechanism for superior catalytic behavior was investigated through electronic structure and surface chemical state of the alloys. A correlation between the work function and catalytic performance of the amorphous alloys with widely varying chemistries was established. To address the high cost associated with the noble-metal containing catalysts, the performance of non-noble Ni-P amorphous catalyst was evaluated for electro-catalysis. A facile pulsed electrodeposition approach was used for the nano-manufacturing of these amorphous catalysts. This nano-manufacturing route allowed the synthesis of fully amorphous nano-wires at room temperature for alloys with little or no noble-metal content. A wide range of nano-wires with varying aspect ratios from 25 to 120 was synthesized using commercially obtained anodic aluminum oxide (AAO) nano-molds. Cyclic voltammetry and chrono-amperometry demonstrated superior performance in terms of electrocatalytic activity and stability of the metallic glass nano-wires towards electro-oxidation …
Date: December 2019
Creator: Hasannaeimi, Vahid
Object Type: Thesis or Dissertation
System: The UNT Digital Library

A Qualitative Study of the Use and Value of Financial Performance Indicators in Selected Community Colleges in the State of Texas as Perceived by their Chief Executive Officers

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Throughout the United States, colleges and universities are faced with an increasing need for financial funding, while at the same time resources continue to diminish. With the limitations of available funds, community colleges must exhibit efficiencies in the operations of their institutions. External interests, such as governing boards and legislatures, require demonstration of efficient financial management. This evidence is then used to make decisions concerning future financial support for the community college. This study determined if community college chief executive officers use financial performance indicators as provided by the State Auditor's Office and if the chief executive officers of the community colleges value the compilation and the distribution of the financial performance indicators. In the selected colleges, many of the chief executive officers depend on their chief financial officer for understanding and application of financial performance indicators. The performance indicators distributed by the Auditor's Office captured only a snapshot of the college's performance, and failed to fully describe the whole college performance or specific financial events captured by the indicators. Though the indicators had flaws, either through incorrect data or lack of explanation, the CEOs did value their compilation because they provided a means for ‘getting the community college story' …
Date: December 1999
Creator: Hase, Karla Luan Neeley
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Influence of Cholesterol Import on Aspergillus fumigatus Growth and Antifungal Suscepibility

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Invasive pulmonary aspergillosis is a life-threatening fungal infection commonly observed in immunocompromised patients and has a mortality rate approaching 100% once the disease is disseminated. Aspergillus fumigatus is the most common pathogen. Early diagnosis improves the prognosis but is very difficult since most signs and symptoms are nonspecific. Antifungal therapy, usually based on sterol biosynthesis inhibitors, is also of limited efficacy. In my attempts to discover a diagnostic sterol marker for aspergillosis, I observed that A. fumigatus incorporates large amounts of cholesterol from serum-containing medium. This observation suggested the hypothesis that exogenous cholesterol from the host can be imported by A. fumigatus and used as a substitute for ergosterol in the cell membrane. This proposed mechanism would reduce the efficacy of antifungal drugs that act as sterol biosynthesis inhibitors. Experiments to test this hypothesis were designed to determine the effects of serum-free and serum-containing medium on growth of A. fumigatus in the presence and absence of azole antifungal agents. The results showed a marked increase in growth in the presence of human serum. Cultures in media containing cholesterol but no serum also showed enhanced growth, a result indicating that a non-cholesterol component of serum is not primarily responsible for the …
Date: December 2003
Creator: Hassan, Saad A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

The Role of Violence in Hunt County, Texas, during Reconstruction

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The post Civil War period known as Reconstruction remains a topic of interest for historians. Having avoided the experience of invasion by Northern troops during the Civil War, the people living in the interior of the state of Texas accepted Confederate defeat at first. However, with the instituting of Northern efforts at Reconstruction, such as the installation of Republican interim government officials, the arrival of Freedmen's Bureau agents, and in some parts the stationing of federal troops, conservative whites throughout the state became defiant toward the federal government and its policies. Some white southerners even went so far as to take up arms and become embroiled in open conflict with the federal government and its local institutions. As a result, Unionist whites and freedmen found themselves to be the targets of groups of desperados committed to upholding the Southern Cause and ensuring the return of the conservative Democratic party to power in Texas politics. This study focuses on Hunt County from the years 1860 - 1873 to determine to what extent violence played a role in the era of Reconstruction. An analysis of data primarily from county, state, and federal records forms the basis of this study. The information obtained …
Date: December 2004
Creator: Hathcock, James A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

An Etiology of Juvenile Homicide in Dallas, Texas: 1988-1997

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This research analyzed all juveniles involved in a homicide, both victims and offenders, in the city of Dallas, Texas from the years 1988 through 1997. This study addressed several research questions including the identification of risk factors common to both victims and offenders. Data for this study was obtained from the homicide files of the Dallas Police Department. The findings in part identify specific profiles of the victims and offenders, as well as identifying comparisons of risk factors between the two groups. Also identified are the relationships between the offenders and victims. Conclusions from this research present implications for law enforcement agencies, as well as furthering the etiology of juvenile homicide.
Date: December 2001
Creator: Haynes, Joseph
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Oral History Interview with Jean Elizabeth Sheppard Hatcher, December 11, 2008

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Interview with Jean Elizabeth Sheppard Hatcher, a veteran of the Coast Guard Women's Reserves from Illinois, regarding her experience her experiences growing up during the Depression, serving in the military during World War II, and her family life after that. Hatcher discusses her background, military experience, waitressing and clerical work, discharge, marriage, and involvement with Ridglea United Methodist Church.
Date: December 11, 2008
Creator: Hegi, Benjamin & Hatcher, Jean Elizabeth Sheppard
Object Type: Book
System: The UNT Digital Library

Oral History Interview with William Alexander Hatcher, December 4, 2008

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Transcript of an interview with William Hatcher, a World War II Army veteran (29th Bomb Group, 20th Air Force). Hatcher discusses concerning his his childhood and education; family's experiences in the Great Depression; decision to attend University of Tennessee-Knoxville and major in mechanical engineering; memories of Pearl Harbor attack; decision to join U.S. Army Enlisted Reserve Corps in 1942; 1943 call-up; basic training at Ft. Belvoir, Va.; instruction in engineering, communications, and radar repair at City College of New York and Chanute Field, Ill.; assignments to Truax Field, Wis., and Boca Raton, Fla.; meeting future wife, Jean E. Sheppard, at USO Club in West Palm Beach, Fla.; transfer to B-29 unit and bases in Neb. And Kan.; deployment to Guam with 29th Bomb Group, 20th Air Force, March 1945; details of high-altitude radar repair work; aspects of daily life for American soldiers stationed in Guam; descriptions of devastation of Japan, including Hiroshima; transfer to base on Tinian; return to U.S. in February 1946; wedding; return to UT-Knoxville using GI Bill benefits; work at Oak Ridge; decision to transfer to University of New Mexico for Mrs. Hatcher's health; career with U.S. Army Corps of Engineers and Convair Corp. of Fort Worth; …
Date: December 4, 2008
Creator: Hegi, Benjamin & Hatcher, William Alexander, 1923-
Object Type: Book
System: The UNT Digital Library

Selected Songs for Chamber Winds and Soprano: Rediscovering a Forgotten Repertoire of John Philip Sousa

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For over one hundred years, the music-going public has reflected on the life and influence of America's “March King,” John Philip Sousa. His popularity as a bandleader was unprecedented, and his reputation as an entertainer captivated the imagination and intrigue of a nation. Sousa's fame was attained through the high standards showcased by his unparalleled concert organization, the Sousa Band. He is interminably linked to the march, and for his seventy-seven years he proved to be its prolific and outspoken champion. Sousa's songs, however, were among his favorite works, and their presence on concert programs reinforced a variety of programming that was the hallmark of his success. The Sousa Band served as a cultural and musical ambassador, and annual transcontinental tours brought music to people where they lived. Sousa's songs were highly anticipated concert features, and were presented by soprano soloists known as the “Ladies in White.” A chamber winds instrumentation, rather than employment of the full-forces of the Sousa Band, allowed for an appropriate musical balance between instruments and voice. The “Forgotten Songs of John Philip Sousa Project” involved the research, editing, and performance of songs housed in the Sousa Archives for Band Research at the University of Illinois. …
Date: December 2001
Creator: Hemberger, Glen J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Techniques of Sensual Perception: The Creation of Emotional Pathways

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Some artists strive to create artwork that has aesthetic value. If a piece of artwork has the ability to capture the attention of an audience, it must contain strong sensual attributes. Thus, understanding how to design an art form to contain strong sensual attributes may increase the possibility of an aesthetic experience. Since aesthetics is an experience of sensations perceived when in contact with a creative form in any artistic discipline, it is necessary for an artist to understand the nature of the sensual experience. In understanding the sensual experience, artists may be able to create techniques to enhance the aesthetic experience of their work. My video piece, entitled Ararat is a study of methods to enhance the sensual experience. I hope to accomplish this by means of using techniques that optimize an audience's perceptual experience.
Date: December 1999
Creator: Henry, Jon L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

The Effect of Attachment on Preschooler's Emotion Understanding

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The purpose of this study was to identify the relationship between attachment and emotion understanding in preschoolers. Data was collected from 16 preschool children and their mothers recruited from a private learning center in a downtown metropolitan area. Attachment was measured by use of the Attachment Q-sort, 3.0 (Waters, 1995), while emotion understanding was assessed through use of Denham's (1986) affective perspective-taking task and interviews of children concerning naturally occurring emotions and emotion causes (Fabes et al., 1991). Results included a significant correlation (p < .05) between secure attachment and preschooler's ability to decipher the cause of another's emotion; however, a significant correlation was not found between secure attachment and preschooler's perspective-taking ability or ability to name other's emotions. Thus, conclusions about the impact of attachment upon emotion understanding were mixed, and more research on the subject was implicated.
Date: December 2000
Creator: Hernandez, Jennie R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Development of a Pre-Impact Environmental Site Characterization for the Bryan Mound, Texas Strategic Petroleum Reserve

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This thesis presents a model for developing site-specific contingency plans to be used during spill response, remediation, and post-spill monitoring using the Strategic Petroleum Reserve's Bryan Mound site as a case study. Bird and vegetation observations provide baseline data for biological conditions, and sediment sampling for total petroleum hydrocarbons serves as a chemical component of the model. Results demonstrate previously unknown conditions that would hinder remediation and affect the persistence of petroleum contaminants. Results also established previously unmapped dominant bird and vegetation types likely to be impacted by a spill at the site. This model points to a reconsideration of individual facilities' responsibilities when planning for large-scale disasters and protecting the sensitive ecosystems surrounding their sites.
Date: December 2001
Creator: Hernandez, Sylvia A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Analysis of Regional Magazine Content and Engagement on Twitter

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This two-part mixed-methods study analyzed the Twitter activity of two regional magazines – D Magazine and Texas Monthly – and how social media editors implement strategies to maintain journalistic integrity (news values, topics, and ethical standards) while increasing engagement.
Date: December 2019
Creator: Higgins, Claire Corinne
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Bank Loans as a Financial Discipline: A Direct Agency Cost of Equity Perspective

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In a 2004 study, Harvey, Lin and Roper argue that debt makers with a commitment to monitoring can create value for outside shareholders whenever information asymmetry and agency costs are pronounced. I investigate Harvey, Lin and Roper's claim for bank loans by empirically testing the effect of information asymmetry and direct agency costs on the abnormal returns of the borrowers' stock around the announcement of bank loans. I divide my study into two main sections. The first section tests whether three proxies of the direct agency costs of equity are equally significant in measuring the direct costs associated with outside equity agency problems. I find that the asset utilization ratio proxy is the most statistically significant proxy of the direct agency costs of equity using a Chow F-test statistic. The second main section of my dissertation includes and event study and a cross-sectional analysis. The event study results document significant and positive average abnormal returns of 1.01% for the borrowers' stock on the announcement day of bank loans. In the cross sectional analysis of the borrowers' average abnormal stock returns, I find that higher quality and more reputable banks/lenders provide a reliable certification to the capital market about the low …
Date: December 2006
Creator: Hijazi, Bassem
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Transplants

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The body of work originating from this Problem in Lieu of Thesis consists of paintings on canvas that incorporate representations of plant material. The impetus for the paintings was black and white photocopies created from mounds of plant material placed on a copy machine. The resulting copies contained forms that were organic in appearance, but unrecognizable as known objects. Parts of the most interesting and ambiguous copies were used to develop the imagery of the paintings. The new forms served the purpose of creating visual interest from unexpected images. Combined with traditional painting techniques, the selected forms produced paintings of mysterious and playful worlds similar to those parts of the environment not readily accessed, such as galactic space, microscopic organisms, and ocean depths.
Date: December 2004
Creator: Holden, Susan Morrow
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Ensemble: 2011-12-01 – Director's Scenes Program

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Opera scenes performed at the UNT College of MusicVoertman Hall.
Date: December 1, 2011
Creator: Homer, Paula
Object Type: Video
System: The UNT Digital Library

Characterization of Moraxella bovis Aspartate Transcarbamoylase

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Aspartate transcarbamoylase (ATCase) catalyzes the first committed step in the pyrimidine biosynthetic pathway. Bacterial ATCases have been divided into three classes, class A, B, and C, based on their molecular weight, holoenzyme architecture, and enzyme kinetics. Moraxella bovis is a fastidious organism, the etiologic agent of infectious bovine keratoconjunctivitis (IBK). The M. bovis ATCase was purified and characterized for the first time. It is a class A enzyme with a molecular mass of 480 to 520 kDa. It has a pH optimum of 9.5 and is stable at high temperatures. The ATCase holoenzyme is inhibited by CTP > ATP > UTP. The Km for aspartate is 1.8 mM and the Vmax 1.04 µmol per min, where the Km for carbamoylphosphate is 1.05 mM and the Vmax 1.74 µmol per min.
Date: December 2001
Creator: Hooshdaran, Sahar
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Community College Faculty Knowledge of Legal Issues and Students with Disabilities: A Case Study.

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The purpose of this study was to investigate the extent of Prince George's Community College faculty knowledge of the legal issues, Section 504 of the Rehabilitation Act of 1973, The Americans With Disabilities Act of 1990, and recent court decisions, related to the provision of classroom accommodations for students with disabilities at the postsecondary level. The focus of the study was to determine if a difference existed between the knowledge of full-time and part-time faculty. Part-time faculty comprise over 50 % of the instructional staffs at most community colleges and are considered an integral part of their institutions, yet they are offered little opportunity for professional development. The variables of gender, department affiliation, teaching at more than one institution, number of years of teaching experience, number of students taught with a disability, and number of individuals known with a disability also were reviewed. Data were collected through a questionnaire distributed to 158 faculty members at the college. Twenty-nine packets were returned as undeliverable. Of the 129 deliverable packets, 57 were returned for a response rate of 44.2%. Results from the analysis of data indicated that faculty have very limited knowledge of the legal issues concerning students with disabilities. Only 26.9% …
Date: December 2003
Creator: Hopkins, Kathleen C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library