Partner
Collection
UNT Theses and Dissertations
271
Texas Digital Newspaper Program
130
Texas Borderlands Newspaper Collection
53
Hudspeth County Area Newspaper Collection
53
Texas Jewish Post
53
Tocker Foundation Grant
53
UNT Graduate Student Works
33
Environmental Policy Collection
30
Journal of Near-Death Studies
29
Texas Catholic Newspaper Collection
24
13 More
Serial/Series Title
Degree Department
Department of Biological Sciences
31
Department of Psychology
30
College of Music
25
Department of Counseling, Development and Higher Education
22
School of Visual Arts
21
Department of Chemistry
17
Department of Behavior Analysis
16
Department of Teacher Education and Administration
15
Department of English
13
Department of Technology and Cognition
11
32 More
Degree Discipline
Degree Level
Country
Decade
Year
Month
Language
536 Matching Results
Results open in a new window/tab.
Equity of access: Exploring Internet connectivity within Oklahoma public schools.
Access:
Use of this item is restricted to the UNT Community
The purpose of this study was to ascertain if conditions or combinations of conditions existed within Oklahoma public schools that created inequities in the availability of classroom Internet connections. A stratified random sample of the 471 school districts was used to identify 300 specific schools for the purpose of data analysis. Data was gathered utilizing a database provided by the Oklahoma State Department of Education and a researcher developed questionnaire. The database provided data relating to four independent variables (region, district size, school type, and school size,). The dependent variable, percentage of classrooms connected to the Internet, was obtained by the researcher designed questionnaire. The state database also provided percentage information relating to students who qualify as minorities and qualify for free or reduced lunches. The data was tested using a series of ANOVAs and a Pearson product-moment correlation coefficient. The findings of the study are as follows: (a) The analysis of variance showed that none of the independent variables had a significant effect upon the percentage of classrooms connected to the Internet; (b) The Pearson product-moment correlation coefficient revealed little or no correlation between the percentage of disadvantaged or minority students and the percentage of classroom Internet connections.
Date:
December 2004
Creator:
Garrett, Galen
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluating the Scalability of SDF Single-chip Multiprocessor Architecture Using Automatically Parallelizing Code
Advances in integrated circuit technology continue to provide more and more transistors on a chip. Computer architects are faced with the challenge of finding the best way to translate these resources into high performance. The challenge in the design of next generation CPU (central processing unit) lies not on trying to use up the silicon area, but on finding smart ways to make use of the wealth of transistors now available. In addition, the next generation architecture should offer high throughout performance, scalability, modularity, and low energy consumption, instead of an architecture that is suitable for only one class of applications or users, or only emphasize faster clock rate. A program exhibits different types of parallelism: instruction level parallelism (ILP), thread level parallelism (TLP), or data level parallelism (DLP). Likewise, architectures can be designed to exploit one or more of these types of parallelism. It is generally not possible to design architectures that can take advantage of all three types of parallelism without using very complex hardware structures and complex compiler optimizations. We present the state-of-art architecture SDF (scheduled data flowed) which explores the TLP parallelism as much as that is supplied by that application. We implement a SDF single-chip …
Date:
December 2004
Creator:
Zhang, Yuhua
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
From inside the Arab family: What literacy practices occur when raising bilingual and biliterate children?
Living in the United States creates unique challenges in biliteracy and bilingualism for the Arab family. While extant literature provides insight into the literacy interactions and experiences of families from many other cultures now living in the U.S. , there is next to nothing regarding the Arab family literacy experience. Thus, knowledge about the literacy activities Arab families engage in as they gain access to and knowledge of a new culture and language is important. The purpose of this study was to investigate and describe the literacy practices of the Arab families raising bilingual and biliterate children in the U.S. This study , using methodology based on ethnographic approaches, investigated the literacy events, behaviors and interactions which occurred within one Arab family over a 16-week period. A second group of participants were 5 other Arab families living in the U.S. Data sources included video and audio recordings, field notes, observations, journals, informal interviews, and artifacts of children's literacy. The researcher and the participants engaged as co-participants in the research. Findings showed that driving factors behind home literacy practices were religious beliefs and the imminence of return to the home country. Arab mothers were found to yield a heavy influence on …
Date:
December 2004
Creator:
Alshaboul, Yousef Mohammad
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Hamiltonian cycles in subset and subspace graphs.
Access:
Use of this item is restricted to the UNT Community
In this dissertation we study the Hamiltonicity and the uniform-Hamiltonicity of subset graphs, subspace graphs, and their associated bipartite graphs. In 1995 paper "The Subset-Subspace Analogy," Kung states the subspace version of a conjecture. The study of this problem led to a more general class of graphs. Inspired by Clark and Ismail's work in the 1996 paper "Binomial and Q-Binomial Coefficient Inequalities Related to the Hamiltonicity of the Kneser Graphs and their Q-Analogues," we defined subset graphs, subspace graphs, and their associated bipartite graphs. The main emphasis of this dissertation is to describe those graphs and study their Hamiltonicity. The results on subset graphs are presented in Chapter 3, on subset bipartite graphs in Chapter 4, and on subspace graphs and subspace bipartite graphs in Chapter 5. We conclude the dissertation by suggesting some generalizations of our results concerning the panciclicity of the graphs.
Date:
December 2004
Creator:
Ghenciu, Petre Ion
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Heart rate and oxygen consumption during the critical prenatal period in chicken embryos (Gallus gallus): Influence of light cues and the onset of pulmonary ventilation.
To examine if a rhythm can be entrained in either heart rate or oxygen consumption in late stage embryos (days 17-19.5) with light as a zeitgeber, chicken embryos were incubated in complete darkness (D:D) and 12:12 light:dark cycle (L:D). Light had no impact on oxygen consumption (390 µL O2∙min-1∙egg-1) but increased heart rate for non-internally pipped embryos (260 to 270 beats∙min-1 during light cycle). Oxygen consumption increased independent of pipping while heart rate increased (255 to 265 beats∙min-1) in D:D embryos due to pipping. A light-induced rhythm or effect occurred in heart rate but not oxygen consumption, suggesting heart rate and oxygen consumption may be uncoupled.
Date:
December 2004
Creator:
Brown, Jessie W.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Impact of Core Knowledge Curriculum on Reading Achievement
The purpose of this study was to examine the impact of Core Knowledge curriculum, a Comprehensive School Reform model, on the reading achievement of elementary students located in a north Texas suburban school district. A repeated measures, matched-comparison design was employed using longitudinal data over a three year period. Repeated measures analyses of variance (ANOVA) were conducted to determine if there were any significant differences in student achievement scores as measured by the Texas Assessment of Knowledge and Skills (TAKS) test. The experimental and control school were examined for student achievement gains overall, for advantaged versus disadvantaged students and for achievement gap differences. Although the results of the statistical analyses indicated that there were no significant differences in the reading TAKS scores of students participating in the study, experimental school students consistently had higher mean scores when compared to the control school in all areas. The evaluation of the achievement gap revealed that although the Core Knowledge school did not close the achievement gap between advantaged and disadvantaged students, the disadvantaged students' scores rose in proportion to the advantaged students, thus preventing an increase in the achievement gap between students.
Date:
December 2004
Creator:
Brading, Aungelique R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The impact of leisure travelers' characteristics on hotel Website attributes preference.
Access:
Use of this item is restricted to the UNT Community
Travel is now the largest online business-to-consumer product in the United States. Online hotel bookings are the second largest segment of online travel. Leisure travelers online spending will increase dramatically from 2002 to 2007. However, a majority of hospitality companies do not currently take advantage of the Internet as the cheapest and most efficient distribution medium. The purpose of this study examined leisure travelers' demographic and psychographic characteristics, online booking and travel frequency that influence travelers' desired hotel Website features and functions. The results found out that demographics (gender, occupation, and ethnicity), and psychographics (travel benefit sought), number of leisure travel trips per year, and number of online hotel bookings per year have impact on hotel Website attribute preferences.
Date:
December 2004
Creator:
Zhang, Li
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Improving Performance in a Global Logistics Company: Operational Performance Before and After Process Improvement
The purpose of this study was to determine the effectiveness of an intervention designed to eliminate damage notification failures in a customer-specific standard operating procedure used by a global logistics company. Process maps identified locations in the process where damage notification failures could most likely occur. A revised process was designed overnight to eliminate as many notification failure points as possible. In addition, a job aid was included to help facilitate the process change for the drivers. The results of the intervention showed a rapid and profound decrease in damage notification failures leading to the retention of a large, profitable account with a minimal initial investment of time and money.
Date:
December 2004
Creator:
Dearman, Shawn Kale
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Individual Behavior Change in the Context of Organization Change: Towards Validation of the Transtheoretical Model of Change in an Organizational Environment
A review of literature indicates limited effort to understand and explain employees' acclimation to, and adoption of, new behaviors required by organization change initiatives. Psychological theories of individual behavior change have, in restricted instances, been applied into organizational environments. The transtheoretical model of change (TTM) offers a comprehensive explanation of behavior change uniting multiple theories of individual change. TTM describes change as a series of stages that individual progress through before arriving at the decision to implement a change in behavior. Movement through the stages is facilitated by processes which increase the probability of a behavior change effort's success. The present research investigated the potential applicability of TTM for explaining individual level change within a new context, specifically, an organizational environment. To examine if individual change in the context of an organization occurs in the fashion described by TTM, measures of core TTM constructs were delivered to employees in a water department of a city in the American southwest. The water department was immersed in an organization change initiative necessitating individual behavior change by its employees. Results of TTM core construct measures and their relationships with each other and the stages of change were examined. Initial findings are indicative of …
Date:
December 2004
Creator:
Phillips, Tobe M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Influence of Perceived Career Barriers on College Women's Career Planning
Research has indicated that balancing work and family is on the minds of college-age women long before they are married. At the same time, women continue to choose occupations that do not fully utilize their abilities and often fail to follow their original career goals. The purpose of this study was to examine the influence of perceived career barriers and supports on young women's career planning. Utilizing Social Cognitive Career Theory (SCCT) and recent literature as a basis, this study conceptualized career goals using the two constructs career salience and career aspirations. Based on information garnered in this student's thesis and on studies examining pathways in the SCCT model, the current study used a hierarchical regression model and hypothesized that barriers related to work and family conflict and sex discrimination would have the most impact on the career aspirations and career salience of young women. Career supports were hypothesized to add significantly to the prediction of these variables, and coping self-efficacy for these types of barriers were hypothesized to depend on the level of these types of barriers perceived and the interaction effect was in turn expected to add significantly to the prediction of career aspirations and career salience. None …
Date:
December 2004
Creator:
Raiff, Gretchen Wade
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Influence of Physically Active Leisure Participation on Obesity in Youth with Spina Bifida
Childhood obesity and resulting secondary complications in youth with disabilities are occurring in epidemic proportions, due in part to a trend of physical inactivity. The purpose of this study is to report the prevalence of overweight, the leisure time activity patterns, and the association between frequency of physically active leisure participation and body mass index for age, in a sample of 50 youth with spina bifida, ages 4.5 to 17.9 years. Results indicate that 52% of the sample are classified as at risk of overweight or overweight; 36% were male and 16% were female. The top five leisure time activities and team sport participation are identified. Subjects who did not use a wheelchair for ambulation participated significantly more in physically active leisure than subjects who used a wheelchair. Future research and rationale for physically active leisure as an intervention for youth with spina bifida are discussed.
Date:
December 2004
Creator:
McCabe, Erin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Information Needs of Art Museum Visitors: Real and Virtual
Museums and libraries are considered large repositories of human knowledge and human culture. They have similar missions and goals in distributing accumulated knowledge to society. Current digitization projects allow both, museums and libraries to reach a broader audience, share their resources with a variety of users. While studies of information seeking behavior, retrieval systems and metadata in library science have a long history; such research studies in museum environments are at their early experimental stage. There are few studies concerning information seeking behavior and needs of virtual museum visitors, especially with the use of images in the museums' collections available on the Web. The current study identifies preferences of a variety of user groups about the information specifics on current exhibits, museum collections metadata information, and the use of multimedia. The study of information seeking behavior of users groups of museum digital collections or cultural collections allows examination and analysis of users' information needs, and the organization of cultural information, including descriptive metadata and the quantity of information that may be required. In addition, the study delineates information needs that different categories of users may have in common: teachers in high schools, students in colleges and universities, museum professionals, art …
Date:
December 2004
Creator:
Kravchyna, Victoria
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Interpreting Prehistoric Patterns: Site Catchment Analysis in the Upper Trinity River Basin of North Central Texas
Archaeologically site catchment analysis produces valuable information regarding prehistoric subsistence strategies and social organization. Incorporating archaeological data into catchment analyses is an effective strategy to develop regional models of prehistoric site selection and settlement patterns. Digital access to data permits the incorporation of multiple layers of information into the process of synthesizing regional archaeology and interpreting corresponding spatial patterning. GIS software provides a means to integrate digital environmental and archaeological data into an effective tool. Resultant environmental archaeology maps facilitate interpretive analysis. To fulfill the objectives of this thesis, GIS software is employed to construct site catchment areas for archaeological sites and to implement multivariate statistical analyses of physical and biological attributes of catchments in correlation with assemblage data from sites. Guided by ecological, anthropological and geographical theories hypotheses testing evaluates patterns of prehistoric socio-economic behavior. Analytical results are summarized in a model of prehistoric settlement patterns in North Central Texas.
Date:
December 2004
Creator:
Williams, Marikka Lin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Investigation into how CACREP Accredited Institutions meet the CACREP Practicum Standards
Access:
Use of this item is restricted to the UNT Community
This study was designed to determine how institutions accredited by the Council for the Accreditation of Counseling and Related Educational Programs (CACREP) meet the practicum requirements set forth in CACREP's 2001 standards. Practicum is a vital part of the matriculation process of counselors in training. This clinical based course allows students to practice the skills they have learned in previous, more didactic based courses. Trainees can stretch skills, all under the watch of a counselor supervisor with greater experience. Although CACREP instructs all accredited counseling programs to have such a course in place, the standards are not specific. Schools are often interpreting the standards in a multitude of ways, presumably to successfully meet the standards while still serving the student as well as the clientele who seek out mental health assistance (Pitts, 1992a). The purpose of this study was to determine what measures CACREP accredited institutions enact to meet the clinical practicum standards. The difference between this study and prior research that has addressed the practicum requirement is that the instrument used in this study specifically addressed every CACREP practicum standard, including technology, diversity, and concerns with supervision and meeting the direct client contact hour requirement. The results of the …
Date:
December 2004
Creator:
Muro, Joel Hart
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Isolation of a Pseudomonas aeruginosa Aspartate Transcarbamoylase Mutant and the Investigation of Its Growth Characteristics, Pyrimidine Biosynthetic Enzyme Activities, and Virulence Factor Production
The pyrimidine biosynthetic pathway is an essential pathway for most organisms. Previous research on the pyrimidine pathway in Pseudomonas aeruginosa (PAO1) has shown that a block in the third step of the pathway resulted in both a requirement for exogenous pyrimidines and decreased ability to produce virulence factors. In this work an organism with a mutation in the second step of the pathway, aspartate transcarbamoylase (ATCase), was created. Assays for pyrimidine intermediates, and virulence factors were performed. Results showed that the production of pigments, haemolysin, and rhamnolipids were significantly decreased from PAO1. Elastase and casein protease production were also moderately decreased. In the Caenorhabditis elegans infection model the nematodes fed the ATCase mutant had increased mortality, as compared to nematodes fed wild type bacteria. These findings lend support to the hypothesis that changes in the pyrimidine biosynthetic pathway contribute to the organism's ability to effect pathogenicity.
Date:
December 2004
Creator:
Hammerstein, Heidi Carol
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The MetaCombine Project
This poster presentation discusses the MetaCombine project, a Mellon-funded effort based at Emory University, with the goal of discovering and developing systems and methods to more meaningfully combine digital libraries, digital library resources, and digital library services.
Date:
December 2004
Creator:
Krowne, Aaron; Ingram, Stephen; Pathak, Saurabh & Halbert, Martin
Object Type:
Poster
System:
The UNT Digital Library
Neuropsychological Predictors of Incompetency to Stand Trial
This study investigated the effect of cognitive factors on competency to stand trial. Previous researchers have investigated how psychological variables --such as psychosis and intelligence--contribute to incompetency. Although several researchers have established that intelligence contributes to incompetency, very few have investigated the role of specific cognitive abilities within the realm of intelligence. This study investigated the performance of 55 defendants referred for competency restoration on neuropsychological measures. Specifically, competent defendants and incompetent defendants were compared on several measures assessing functioning in seven cognitive domains. Competent defendants performed significantly better than incompetent defendants on measures of verbal comprehension, social judgment, verbal memory, and executive functioning. Competent and incompetent defendants did not differ on attention, visual spatial skills, or nonverbal memory.
Date:
December 2004
Creator:
Grandjean, Nicole Rae
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An NMR Study of Trimethylsilylmethyllithium Aggregates and Mixed Trimethylsilylmethyllithium/Lithium trimethylsilylmethoxide Aggregates
Access:
Use of this item is restricted to the UNT Community
An NMR spectroscopy study of trimethylsilylmethyllilthium, TMSM-Li, indicates that TMSM-Li exists as two different aggregates in cyclopentane solution. Using previously reported colligative properties of TMSM-Li in different solutions in connection with new 13C and 6Li NMR data collected in this study, aggregation states were assigned as octamer and hexamer. Low temperature 13C and 6Li NMR peak intensities indicated an equilibrium exists between the two aggregates that shifts toward the octamer as the temperature decreases. ΔH was calculated to be 5.23 + 0.15 kcal/mol and ΔS was calculated to be 17.9 + 0.6 eu for the hexamer/octamer equilibrium system. Samples of TMSM-Li were mixed with TMSM-OH in attempts to form mixed alkyllithium/lithium alkoxide aggregates. 13C NMR data for these mixtures gave inconclusive results whether or not these compounds formed, which is different from other primary alkyllithium compounds studied in the past. A study of neopentyllithium, NpLi, indicates only one aggregate in solution with the aggregation state unknown using low temperature 13C NMR spectroscopy.
Date:
December 2004
Creator:
Medley, Marilyn S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
De novo prediction of the ground state structure of transition metal complexes.
Access:
Use of this item is restricted to the UNT Community
One of the main goals of computational methods is to identify reasonable geometries for target materials. Organometallic complexes have been investigated in this dissertation research, entailing a significant challenge based on transition metal diversity and the associated complexity of the ligands. A large variety of theoretical methods have been employed to determine ground state geometries of organometallic species. An impressive number of transition metals entailing diverse isomers (e.g., geometric, spin, structural and coordination), different coordination numbers, oxidation states and various numbers of electrons in d orbitals have been studied. Moreover, ligands that are single, double or triple bonded to the transition metal, exhibiting diverse electronic and steric effects, have been investigated. In this research, a novel de novo scheme for structural prediction of transition metal complexes was developed, tested and shown to be successful.
Date:
December 2004
Creator:
Buda, Corneliu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Optimal Access Point Selection and Channel Assignment in IEEE 802.11 Networks
Designing 802.11 wireless networks includes two major components: selection of access points (APs) in the demand areas and assignment of radio frequencies to each AP. Coverage and capacity are some key issues when placing APs in a demand area. APs need to cover all users. A user is considered covered if the power received from its corresponding AP is greater than a given threshold. Moreover, from a capacity standpoint, APs need to provide certain minimum bandwidth to users located in the coverage area. A major challenge in designing wireless networks is the frequency assignment problem. The 802.11 wireless LANs operate in the unlicensed ISM frequency, and all APs share the same frequency. As a result, as 802.11 APs become widely deployed, they start to interfere with each other and degrade network throughput. In consequence, efficient assignment of channels becomes necessary to avoid and minimize interference. In this work, an optimal AP selection was developed by balancing traffic load. An optimization problem was formulated that minimizes heavy congestion. As a result, APs in wireless LANs will have well distributed traffic loads, which maximize the throughput of the network. The channel assignment algorithm was designed by minimizing channel interference between APs. The …
Date:
December 2004
Creator:
Park, Sangtae
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Oregon Strategy for Greenhouse Gas Reductions
The Governor´s Advisory Group on Global Warming adopted its final recommendations to Governor Kulongoski to reduce Oregon´s greenhouse gas emissions at its meeting on December 17, 2004.
Date:
December 2004
Creator:
Governor’s Advisory Group On Global Warming
Object Type:
Text
System:
The UNT Digital Library
Passionate transformation in vernicle images.
This thesis will examine the iconography of late-thirteenth- through fifteenth-century images of St. Veronica's veil, also known as vernicles. In the late Middle Ages, vernicle iconography changed from iconic representations of Christ's face toward graphic imagery of Christ's suffering during his Passion. These passionate transformations, as I have called them, were affected by the Roman Sudarium relic, popular devotion to Christ's suffering and humanity during his Passion, and the Catholic ritual of Mass. This thesis will consider how the function of vernicle images during Mass was reflected in their iconography throughout Europe between 1250 and 1500.
Date:
December 2004
Creator:
Hoffman, J. Starr
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Past tense marking in Chinese-English interlanguage.
Access:
Use of this item is restricted to the UNT Community
This data study concentrates on the past tense marking in the interlanguage (IL) of Chinese speakers of English. Following the assumptions of Hawkins & Lizska, (2003), it is assumed that unlike native speakers of English, Chinese speakers of English have a higher level of optionality within the past tense marking of their grammars. It is claimed that the primary reason for this occurrence is the lack of the functional feature T(ense) [+/-past] in Mandarin Chinese. If a particular functional feature is missing in a learner's L1 grammar, it is thought that it will be absent in one's L2 grammar as well. Three advanced Chinese speakers of English were tested on the past tense marking in their IL production. Both spontaneous oral and reading speech were used for this data analysis.
Date:
December 2004
Creator:
Flahive, Patrick J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Peptide-based hidden Markov model for peptide fingerprint mapping.
Access:
Use of this item is restricted to the UNT Community
Peptide mass fingerprinting (PMF) was the first automated method for protein identification in proteomics, and it remains in common usage today because of its simplicity and the low equipment costs for generating fingerprints. However, one of the problems with PMF is its limited specificity and sensitivity in protein identification. Here I present a method that shows potential to significantly enhance the accuracy of peptide mass fingerprinting, using a machine learning approach based on a hidden Markov model (HMM). This method is applied to improve differentiation of real protein matches from those that occur by chance. The system was trained using 300 examples of combined real and false-positive protein identification results, and 10-fold cross-validation applied to assess model discrimination. The model can achieve 93% accuracy in distinguishing correct and real protein identification results versus false-positive matches. The receiver operating characteristic (ROC) curve area for the best model was 0.833.
Date:
December 2004
Creator:
Yang, Dongmei
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library