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UNT Theses and Dissertations
896
Photographing Texas
588
Texas Digital Newspaper Program
524
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390
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2,075 Matching Results
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Resource Management in Wireless Networks
A local call admission control (CAC) algorithm for third generation wireless networks was designed and implemented, which allows for the simulation of network throughput for different spreading factors and various mobility scenarios. A global CAC algorithm is also implemented and used as a benchmark since it is inherently optimized; it yields the best possible performance but has an intensive computational complexity. Optimized local CAC algorithm achieves similar performance as global CAC algorithm at a fraction of the computational cost. Design of a dynamic channel assignment algorithm for IEEE 802.11 wireless systems is also presented. Channels are assigned dynamically depending on the minimal interference generated by the neighboring access points on a reference access point. Analysis of dynamic channel assignment algorithm shows an improvement by a factor of 4 over the default settings of having all access points use the same channel, resulting significantly higher network throughput.
Date:
August 2006
Creator:
Arepally, Anurag
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Analysis of Adler's Theory and the Female Criminal
This research paper addressed the following question: Do select case studies conform to Dr. Freda Adler's theory regarding socio-economic influences on female criminal behavior or dispute her theory? My research involved three female criminals: Karla Faye Tucker, Andrea Yates, and Susan Smith. I addressed Adler's theory in detail, other theories, the makeup of the female criminal and various female crimes. This study provided evidence that all three case studies conform to Adler's theory. nIn accordance with Adler's theory, each of these three females committed crimes of accessibility. None of the three individuals sought to commit a premeditated act or to murder unknown victims. They were motivated by emotions arising at a point in time when access/opportunity presented itself.
Date:
August 2004
Creator:
Armentrout, Elizabeth G.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Investigation into the Current Practices of Group Counseling Instructors in the Delivery of the Required Experiential Group in Accredited Institutions
This study was designed to determine the diverse practices of group counseling instructors in the delivery of the required experiential group. A small group experience (experiential group) is required of all counseling students in accredited institutions. The accreditation body for counseling programs is the Council for the Accreditation of Counseling and Related Educational Programs (CACREP). The experiential group has been considered to be a valuable and integral part of counselor training. However, the group has been controversial because of ethical issues involving dual relationships and the right to privacy. The purpose of this study was to determine how group counseling instructors deliver the experiential group, compare current practices to recommended practices in the literature, and recommend changes based on disparities that may exist. The difference between this study and previous surveys of group counseling instructors is that the sample in this study involves CACREP institutions exclusively and the focus is on CACREP standards rather than the standards of the Association for Specialists in Group Work. The results of the study showed that approximately one third of the instructors surveyed indicated that they also serve as leaders of the experiential group. Many of these instructors who serve as group leaders also …
Date:
August 2002
Creator:
Armstrong, Stephen A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Hutto Business Update (Hutto, Tex.), Vol. 1, No. 6, Ed. 1 Monday, August 1, 2005
Monthly newsletter focusing on information for and about the business community in Hutto, Texas, along with advertising.
Date:
August 1, 2005
Creator:
Arnett, Mahlon E., II
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Hutto Business Update (Hutto, Tex.), Vol. 3, No. 3, Ed. 1 Wednesday, August 1, 2007
Bimonthly newsletter focusing on information for and about the business community in Hutto, Texas, along with advertising.
Date:
August 1, 2007
Creator:
Arnett, Mahlon E., II
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Hutto Business Update (Hutto, Tex.), Vol. 4, No. 2, Ed. 1 Friday, August 1, 2008
Newsletter focusing on information for and about the business community in Hutto, Texas, along with advertising.
Date:
August 1, 2008
Creator:
Arnett, Mahlon E., II
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Nature of the Impact of a Reading Tutoring Program on Participating Students in the Classroom: A Qualitative Study
The purpose of this qualitative multi-case study was to explore the nature of the impact that a tutoring program, which featured preservice teachers as tutors, had on participating fifth grade at-risk students literacy behaviors in the classroom.The researcher served in the role of passive participant observer during the scheduled language arts period three days per week in the participating students classroom for a period of twenty-three weeks. Field notes were made in the classroom and coded, and audio tapes were recorded and transcribed of the tutoring sessions. Formal and informal interviews with the teacher, tutors, and participating students were conducted, transcribed, and coded. Lesson plans and reflections developed and written by the tutors were gathered and coded. Observations indicated that there were four types of reading required on a daily basis in the classroom. Assigned readings made by the teacher included narrative and expository texts. Pleasure readings were materials chosen by the students, but at certain times were teacher initiated and at other times, student initiated. The four types of reading found in the classroom were mirrored by the tutoring sessions. Students observed in the classroom could be divided into two types and four categories. Those with positive attitudes were …
Date:
August 2000
Creator:
Arrowood, Dana R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Understanding Ancient Math Through Kepler: A Few Geometric Ideas from The Harmony of the World
Euclid's geometry is well-known for its theorems concerning triangles and circles. Less popular are the contents of the tenth book, in which geometry is a means to study quantity in general. Commensurability and rational quantities are first principles, and from them are derived at least eight species of irrationals. A recently republished work by Johannes Kepler contains examples using polygons to illustrate these species. In addition, figures having these quantities in their construction form solid shapes (polyhedra) having origins though Platonic philosophy and Archimedean works. Kepler gives two additional polyhedra, and a simple means for constructing the “divine” proportion is given.
Date:
August 2002
Creator:
Arthur, Christopher
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Anatomy of Academic Dishonesty: Cognitive Development, Self-Concept, Neutralization Techniques, and Attitudes Toward Cheating
This study explored the relationship between cheating among university students and their cognitive developmental levels, use of neutralization techniques, self-concept as a multifaceted cognitive construct, and attitude toward cheating. The purposes of this study were to investigate: (1) The relationships between academic dishonesty and each of the following overall independent variables: cognitive development, use of neutralization techniques, self-concept as a multifaceted cognitive construct, and attitude toward cheating, and (2) the reasons behind college student academic cheating behaviors. The study used data from anonymous, self-report surveys administered to undergraduate students in-class and at supplemental sessions. Student participation was voluntary. The study was correlational. The five hypotheses were: (1) Self-concept is significantly and negatively related to academic dishonesty; (2) Cognitive development is significantly and negatively related to academic dishonesty; (3) Attitude toward cheating is significantly and negatively related to academic dishonesty; (4) The use of neutralization techniques is significantly and positively related to academic dishonesty; (5) Cognitive development, self-concept, and attitude toward cheating will make significant contributions to the regression model for the dependent variables of academic dishonesty. The data supported the first, third, and fourth hypotheses. However, the second and fifth hypotheses were supported under certain conditions. The roles of cognitive …
Date:
August 2004
Creator:
Arvidson, Cody Jean
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The relationship between models of student laptop computer use and teacher instructional behavior
This study investigated the relationship between four models of student laptop computer use and three components of teacher instructional behavior: planning, implementation of instruction, and evaluation of instruction. The four models of use: full access, dispersed, class set, and mixed, represented the numerous ways teachers in public and private schools and school districts nationwide implemented student use of laptop computers. Teacher planning behavior was investigated with regard to time, frequency, complexity, difficulty, the need for revision, and use of technological resources and materials. Implementation of instruction was examined with regard to student grouping, instructional strategies, instructional content/subject matter, teacher and student roles, assignments and learning tasks, and instructional activities. The evaluation of instruction component was examined with regard to assessment tasks, grading, and assessment of homework. Using a researcher-designed questionnaire, data was gathered in a single-stage cross-sectional survey from 356 teachers working in 74 public and private schools nationwide. Results indicated models of student laptop computer use had differential effects on teacher instructional behaviors. On average, teachers found planning to be more arduous, but more collegial, especially in the mixed model. The full access and mixed models were more likely to advance a constructivist approach to teacher instructional behaviors with …
Date:
August 2001
Creator:
Ashmore, Barbara A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Human concept cognition and semantic relations in the unified medical language system: A coherence analysis.
There is almost a universal agreement among scholars in information retrieval (IR) research that knowledge representation needs improvement. As core component of an IR system, improvement of the knowledge representation system has so far involved manipulation of this component based on principles such as vector space, probabilistic approach, inference network, and language modeling, yet the required improvement is still far from fruition. One promising approach that is highly touted to offer a potential solution exists in the cognitive paradigm, where knowledge representation practice should involve, or start from, modeling the human conceptual system. This study based on two related cognitive theories: the theory-based approach to concept representation and the psychological theory of semantic relations, ventured to explore the connection between the human conceptual model and the knowledge representation model (represented by samples of concepts and relations from the unified medical language system, UMLS). Guided by these cognitive theories and based on related and appropriate data-analytic tools, such as nonmetric multidimensional scaling, hierarchical clustering, and content analysis, this study aimed to conduct an exploratory investigation to answer four related questions. Divided into two groups, a total of 89 research participants took part in two sets of cognitive tasks. The first group …
Date:
August 2007
Creator:
Assefa, Shimelis G.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Attitudes of American School Counselor Association Members toward Utilizing Paraprofessionals in School Counseling
The principal investigator (PI) for this study surveyed 207 American School Counselor Association (ASCA) members on their attitudes toward utilizing trained counseling paraprofessionals in school counseling. The PI also examined the relationship between participants attitudes and their subjective reports of the counselor-student ratios in their schools, the amount of work time they spent providing direct counseling services to students, and the extent to which their districts experienced a school counselor shortage. The participants mean reported counselor-student ratio (1:464.63) significantly exceeded ASCA recommendations of 1:250. Elementary counselors reported the highest counselor-student ratios while high school counselors reported the lowest. Furthermore the PI found a significant linear trend for counselor-student ratios to decrease as school level increased. The participants reported mean percentage of time involved in direct counseling services (61.48%) fell significantly below the ASCA recommended 70%. Elementary counselors reported the highest amount of time involved in direct counseling services while high school counselors reported the lowest. The PI also found a significant linear trend for percentages of time involved in direct services to decrease as school level increased. Over one-fourth of the participants indicated school counselor shortages existed in their districts. A majority of participants supported utilizing counseling paraprofessionals in their …
Date:
August 2000
Creator:
Astramovich, Randall L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Immediate and subsequent effects of response blocking on self-injurious behavior.
Abstract In many institutional settings, blocking, response restriction (e.g., restraint, protective equipment), and re-direction procedures are used extensively as intervention for self-injurious behavior (SIB) and other forms of problem behavior. In the current study, a three component, multiple-schedule analysis was used to examine the immediate and subsequent effects of blocking on SIB that persisted in the absence of social reinforcement contingencies. During the first and third components the participant was in the room, alone, with no social consequences for SIB. During the second component (response restriction) the therapist sat in the room with the participant and blocked occurrences of SIB. Results indicated that, although blocking was effective in decreasing SIB while it was being implemented, subsequent effects were idiosyncratic across participants. Evidence of increased levels of SIB following blocking was observed for some participants.
Date:
August 2006
Creator:
Atcheson, Katy
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Atrazine Monitoring and Modeling in the Lake Lavon Watershed
This report describes a study to identify the distribution and extent of areas potentially at risk for atrazine (a broad leaf weedkiller) runoff in the Lake Lavon watershed, which is a major water supply for the Dallas area. The report presents the results of the study and makes recommendations for how information can be used in a cost-effective watershed atrazine reduction strategy.
Date:
August 2001
Creator:
Atkinson, Samuel F.; Waller, William T.; Dickson, Kenneth L.; Sanmanee, Sirichai & Moreno, Maria C.
Object Type:
Book
System:
The UNT Digital Library
The Nonadditive Generalization of Klimontovich's S-Theorem for Open Systems and Boltzmann's Orthodes
We show that the nonadditive open systems can be studied in a consistent manner by using a generalized version of S-theorem. This new generalized S-theorem can further be considered as an indication of self-organization in nonadditive open systems as prescribed by Haken. The nonadditive S-theorem is then illustrated by using the modified Van der Pol oscillator. Finally, Tsallis entropy as an equilibrium entropy is studied by using Boltzmann's method of orthodes. This part of dissertation shows that Tsallis ensemble is on equal footing with the microcanonical, canonical and grand canonical ensembles. However, the associated entropy turns out to be Renyi entropy.
Date:
August 2008
Creator:
Bagci, Gokhan Baris
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Dallas as Region: Mark Lemmon's Gothic Revival Highland Park Presbyterian Church
Informed by the methodology utilized in Peter Williams's Houses of God: Region, Religion, and Architecture in the United States (1997), the thesis examines Mark Lemmon's Gothic Revival design for the Highland Park Presbyterian Church (1941) with special attention to the denomination and social class of the congregation and the architectural style of the church. Beginning with the notion that Lemmon's church is more complex than an expression of the Southern cultural region defined by Williams, the thesis presents the opportunity to examine the church in the context of the unique cultural region of the city of Dallas. Church archival material supports the argument that the congregation deliberately sought to identify with both the forms and ideology of the late nineteenth-century Gothic Revival in the northeastern United States, a result of the influence of Dallas's cultural region.
Date:
August 2004
Creator:
Bagley, Julie Arens
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Complemented Subspaces of Bounded Linear Operators
For many years mathematicians have been interested in the problem of whether an operator ideal is complemented in the space of all bounded linear operators. In this dissertation the complementation of various classes of operators in the space of all bounded linear operators is considered. This paper begins with a preliminary discussion of linear bounded operators as well as operator ideals. Let L(X, Y ) be a Banach space of all bounded linear operator between Banach spaces X and Y , K(X, Y ) be the space of all compact operators, and W(X, Y ) be the space of all weakly compact operators. We denote space all operator ideals by O.
Date:
August 2003
Creator:
Bahreini Esfahani, Manijeh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Path to Carbon Dioxide-Free Power: Switching to Clean Energy in the Utility Sector
This report examines the policies and measures needed to accelerate the use of those technologies and dramatically reduce U.S. heat-trapping gas emissions by 2020. The goal is to set the nation on the path to achieving zero-carbon electricity by mid-century.
Date:
August 2003
Creator:
Bailie, Alison; Bernow, Stephen; Castelli, Brian; O’Connor, Pete; Romm, Joseph & Tellus Institute & The Center for Energy and Climate Solutions April
Object Type:
Text
System:
The UNT Digital Library
Cyclic Patterns in John Coltrane's Melodic Vocabulary as Influenced by Nicolas Slonimsky's Thesaurus of Scales and Melodic Patterns: An Analysis of Selected Improvisations
This study documents and analyzes cyclic patterns used as melodic vocabulary in John Coltrane's improvisations from compositions of 1965 to 1967. The analysis is categorized in two distinct sections. The first section analyzes melodic vocabulary that is derived from the cycle of descending major thirds progressions found in the compositions of 1959 to 1960. The second section analyzes melodic vocabulary that is derived from Nicolas Slonimsky's Thesaurus of Scales and Melodic Patterns using the theoretical terminology incorporated in the treatise. Musical examples consist of patterns from the Thesaurus and excerpts from selected improvisations of John Coltrane as transcribed by Andrew White. Important scholarly contributions relevant to the subject by Carl Woideck, Lewis Porter, David Demsey, and Walt Weiskopf are included. Every effort has been made to cite interviews with musicians and commentaries by writers contemporary to that period of time with special emphasis on the important influence of Thelonious Monk, Miles Davis, and Ornette Coleman. Chapter headings include: Literature Review and Methodology; Thelonious Monk, Miles Davis, and Ornette Coleman: Converging Influences; Analysis: Coltrane's Major Thirds Harmonic Cycles Used as Melodic Vocabulary; Interval Cycles in Coltrane's Melodic Vocabulary Based on Patterns from Slonimsky's Thesaurus; Summary and Conclusion.
Date:
August 2003
Creator:
Bair, Jeff
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Fair balance? An analysis of the functional equivalence of risk and benefit information in prescription drug direct-to-consumer television advertising.
Prescription drug direct-to-consumer advertising (DTCA) has been a subject of controversy in recent years. Though government regulations require equivalent prominence of risks and benefits, there is concern about the ability of consumers with limited health literacy to fully comprehend the risks and benefits associated with drug use. Evaluating the images in DTCA is important because individuals may rely on the visual message if the wording is overly complex. Using semiotics, this study aims to evaluate whether there is functional equivalence in the presentation of risk and benefit information in prescription drug direct-to-consumer television advertising. A new analytical method is created and used to assess the consistency between the messages contained in the voice track, the primary visual images, and the superscript/ subscript text. The results indicate that risk and benefit messages in this DTCA sample lack functional equivalence. However, it is important to properly frame these findings as the study does not evaluate viewer comprehension of the various message structures.
Date:
August 2009
Creator:
Baird-Harris, Kay
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Always Painting the Future: Utopian Desire and the Women's Movement in Selected Works by United States Female Writers at the Turn of the Twentieth Century
This study explores six utopias by female authors written at the turn of the twentieth century: Mary Bradley Lane's Mizora (1881), Alice Ilgenfritz Jones and Ella Merchant's Unveiling Parallel (1893), Eloise O. Richberg's Reinstern (1900), Lena J. Fry's Other Worlds (1905), Charlotte Perkins Gilman's Herland (1915), and Martha Bensley Bruère's Mildred Carver, USA (1919). While the right to vote had become the central, most important point of the movement, women were concerned with many other issues affecting their lives. Positioned within the context of the late nineteenth century women's rights movement, this study examines these "sideline" concerns of the movement such as home and gender-determined spheres, motherhood, work, marriage, independence, and self-sufficiency and relates them to the transforming character of female identity at the time. The study focuses primarily on analyzing the expression of female historical desire through utopian genre and on explicating the contradictory nature of utopian production.
Date:
August 2009
Creator:
Balic, Iva
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Opinions of Turkish immigrants living in Houston about the conflict between secularism and Islam in Turkey.
This study was designed to examine the opinions of Turkish immigrants living in the Houston metropolitan area about the conflict between secularism and Islam in Turkey. The study examined the role of the practice of religion on the opinions about the clash between secularism and Islam. A final sample consisted of 40 immigrants recruited through purposeful and snowball sampling. In-depth interviews and a survey including screening questions were conducted. The results indicated that practice of religion has a partial impact on the opinions of Turkish immigrants about the conflict between secularism and Islam. Future research should further examine if the experience of living abroad for a long period influence Turkish immigrants' opinions about the same issue.
Date:
August 2008
Creator:
Balkan, Betul
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Modeling the chemical and photophysical properties of gold complexes.
Various gold complexes were computationally investigated, to probe their photophysical, geometric, and bonding properties. The geometry of AuI complexes (ground state singlet) is very sensitive to the electronic nature of the ligands: σ-donors gave a two-coordinate, linear shape; however, σ-acceptors yielded a three-coordinate, trigonal planar geometry. Doublet AuIIL3 complexes distort to T-shape, and are thus ground state models of the corresponding triplet AuIL3. The disproportionation of AuIIL3 to AuIL3 and AuIIIL3 is endothermic for all ligands investigated, however, σ-donors are better experimental targets for AuII complexes. For dimeric AuI complexes, only one gold center in the optimized triplet exciton displays a Jahn-Teller distortion, and the Au---Au distance is reduced versus the ground state distance (i.e., two reasons for large Stokes' shifts).
Date:
August 2004
Creator:
Barakat, Khaldoon A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An empirical investigation of how perceived devaluation and income effects influence consumers' intended utilization of savings from coupon redemption.
Coupons are one of the most popular and attractive tools of promotion. Redeeming coupons makes shoppers feel that they are doing something good for their family's budget, because coupons offer 'savings.' On the other hand, a coupon might have several negative effects on purchase behavior as well, which might 'devalue' the promoted product in the consumer's perception. But a review of the literature shows a lack of attention afforded to the above-mentioned aspects of coupon redemption. In addition, the consumer's coupon redemption behavior is moderated by several factors drawn from research in the fields of market pricing, economics and psychology, each of which have contributed to the current study in their own way. Finally, there does not exist any substantive research as to why coupon redemption rates have been on the decline, despite an increase in distribution of coupons. Therefore, this research not only fills existing gaps in the literature but also enriches it by synthesizing views from different academic disciplines. This dissertation concentrates on grocery products. Data is collected from about 2500 adults, primarily residing in the Dallas-Fort Worth area. The conceptual framework is based on the theory of reasoned action, which suggests that an individual's beliefs influence his/her …
Date:
August 2007
Creator:
Barat, Somjit
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library