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Nature By Design

Description: Organic forms representing nature, but not particular species, are combined with elements signifying attitudes toward the natural world with an emphasis on North American culture. The viewer is encouraged to consider human effects on the environment. Aquarium Night Light and Trophy both refer to the human tendency for commercial exploitation coupled with the creation of nature images we sometimes seem to prefer over the reality of the natural world. Reliquary metaphorically connects traditional religious connotations associated with saints' relics to both a biblical injunction to use anything we needed from the natural world and our contemporary belief that exposure to nature can have beneficial effects on human mental, spiritual, and physical health.
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Date: December 2002
Creator: Lingle, Linda A.

NMR Study of n-Propyllithium Aggregates

Description: A variable temperature 1H, 13C, and 6Li NMR study of n-propyl-6Li-lithium showed five different aggregates, similar to that in the literature as (RLi)n, n= 6, 8, 9, 9, 9. There were also a number of additional new species, identified as lithium hydride containing aggregates. Unexpectedly, a series of 13C{1H} 1-D NMR experiments with selective 6Li decoupling showed evidence for 13C-6Li spin-spin coupling between the previously reported (RLi)n aggregates and various hydride species.
Date: December 2002
Creator: Davis, James W.

Partisanship and Judicial Decision Making in U.S. Courts of Appeal

Description: Partisanship is found in voter and Congressional behavior. Members of the federal judiciary should behave similarly. I utilize cases involving the Republican and Democratic parties from 1966 to 1997 and examine the voting behavior of federal Courts of Appeal judges. I utilize both cross tabulations and a Logit regression model to determine the likelihood appellate judges will vote for their own party and against the opposition.
Date: December 2002
Creator: Meaders, Eddie Loyd

Perceptions of Preservice Educators, Inservice Educators, and Professional Development Personnel Regarding Effective Methods for Learning Technology Integration Skills

Description: This study examined educators' preferences for learning technology integration skills in order to provide the education community with justifiable data concerning the need for educator training alternatives. A survey was distributed to compare preservice educators, inservice educators, and professional development personnel's perceived effectiveness of eight training methods (N=759). The four research questions examined were: Do differences exist among preservice educators, inservice educators, and professional development personnel in the perceived effectiveness of different methods for learning technology integration skills? (2) Do differences exist among preservice educators, inservice educators, and professional development personnel in the perceived effectiveness of different methods for learning technology integration skills when categorized by age? (3) Do differences exist among preservice educators, inservice educators, and professional development personnel in the perceived effectiveness of different methods for learning technology integration skills when categorized by total hours of instruction? (4) Do differences exist among preservice educators, inservice educators, and professional development personnel in the perceived effectiveness of different methods for learning technology integration skills when categorized by locus of control? All groups were measured for similarities and differences in preferences on credit classes, workshops, open computer labs, technology personnel support, peer support, online help, printed documentation, and trial and error. In addition, those training preferences were cross-referenced with age, training hours, and the locus of control personality factor. MANOVAs and post-hoc analyses were performed for each major research question as well as trends in the data were examined. This study indicated that the most effective training methods were technical support, peer support, and credit courses. The least effective training methods were online help, printed documentation, workshops, and computer labs. Age, amount of training hours, and locus of control score did not provide as much information as did educator type when predicting training preference. Based on the findings of this study, ...
Date: December 2002
Creator: Robinson, Linda Marie McDonald

Performance Evaluation of MPLS on Quality of Service in Voice Over IP (VoIP) Networks

Description: The transmission of voice data over Internet Protocol (IP) networks is rapidly gaining acceptance in the field of networking. The major voice transmissions in the IP networks are involved in Internet telephony, which is also known as IP telephony or Voice Over IP (VoIP). VoIP is undergoing many enhancements to provide the end users with same quality as in the public switched telephone networks (PSTN). These enhancements are mostly required in quality of service (QoS) for the transmission of voice data over the IP networks. As with recent developments in the networking field, various protocols came into market to provide the QoS in IP networks - of them, multi protocol label switching (MPLS) is the most reliable and upcoming protocol for working on QoS. The problem of the thesis is to develop an IP-based virtual network, with end hosts and routers, implement MPLS on the network, and analyze its QoS for voice data transmission.
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Date: December 2002
Creator: Chetty, Sharath

A Physiological Age-Grading System for Female Hydrellia pakistanae Deonier (Diptera: Ephydridae)

Description: Conflicting opinions about the effectiveness of H. pakistanae as a biological control agent for hydrilla prompt researchers to find a method for assessing the fly's success. Developing a physiological age-grading system for the fly using ovarian morphology to detect changes in reproductive activity is useful for evaluating reproductive status of the fly in field populations. Changes in the appearance of follicular relics in ovaries with oviposition provide a reliable method to estimate fecundity. Characteristics of follicular relics were used to develop a system with eight physiological age classes, three nulliparous and five parous. Changes that occur in the fat body were used to assist in classification of nulliparous females or those with low egg counts.
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Date: December 2002
Creator: Lenz, Jennifer Marie

Preconceived Notions of Scale Relationships

Description: I proposed in my paper to use juxtaposition of unexpected scale in my sculpture, with the expectation that it would create an unexpected tension that is visually stimulating to the viewer. I achieved this by creating disharmony in scale between an object that is perceived as miniature and an object that is perceived as gigantic within each sculpture. I then asked three questions of these sculptures: Was I able to alter the viewer's preconceived notions of the miniature and the gigantic through the manipulation of the size relationship between two objects within each sculpture? Which of these preconceived notions of the miniature or the gigantic became dominant as the main focal point in each sculpture? Did this intentional use of disharmony in scale stimulate enough of my interest to continue investigating this idea? I wrote about three sculptures that had been made for this project. The first was Manifest Destiny, a seven and a half foot tall bronze piece depicting an oil drill with a platform in the shape of the state of Texas. On the platform a gigantic bronze figure rides a miniature bronze donkey across the platform. The second bronze sculpture I wrote about was Gulliver in Suburbia; standing seven and a half feet it depicts a large bronze figure trapped within a miniature ship that stands on stilts. The last piece a wrote about was I've Outgrown This One House Town, a seven foot three inch tall bronze sculpture which depicts the frame of a house with a frame chair and bed inside. On top of the house a bronze figure sits on the roof as if it were riding a horse. I judged all three pieces to be successful and they answered all of the questions affirmatively.
Date: December 2002
Creator: McClung, Jeffrey Bruce

A Quality of Service Aware Protocol for Power Conservation in Wireless Ad Hoc and Mobile Networks

Description: Power consumption is an important issue for mobile computers since they rely on the short life of batteries. Conservation techniques are commonly used in hardware design of such systems but network interface is a significant consumer of power, which needs considerable research to be devoted towards designing a low-power design network protocol stack. Due to the dynamic nature of wireless networks, adaptations are necessary to achieve energy efficiency and a reasonable quality of service. This paper presents the application of energy-efficient techniques to each layer in the network protocol stack and a feedback is provided depending on the performance of this new design. And also a comparison of two existing MAC protocols is done showing a better suitability of E2MAC for higher power conservation. Multimedia applications can achieve an optimal performance if they are aware of the characteristics of the wireless link. Relying on the underlying operating system software and communication protocols to hide the anomalies of wireless channel needs efficient energy consumption methodology and fair quality of service like E2MAC. This report also focuses on some of the various concerns of energy efficiency in wireless communication and also looks into the definition of seven layers as defined by International Standards Organization.
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Date: December 2002
Creator: Gangidi, Murali

Radio frequency propagation differences through various transmissive materials.

Description: The purpose of this research was to determine which of the commonly used wireless telecommunication site concealment materials has the least effect on signal potency. The tested materials were Tuff Span® fiberglass panels manufactured by Enduro Composite Systems, Lexan® XL-1 polycarbonate plastic manufactured by GE Corporation and Styrofoam™ polystyrene board manufactured by The Dow Chemical Company. Testing was conducted in a double electrically isolated copper mesh screen room at the University of North Texas Engineering Technology Building in Denton, Texas. Analysis of the data found no differences exist between the radio frequency transmissiveness of these products at broadband personal communication service frequencies. However, differences in the signal do exist with regards to the angle of incidence between the material and the transmitting antenna.
Date: December 2002
Creator: Ryan, Patrick L.

Ranges of consideration: crossing the fields of ecology, philosophy and science studies.

Description: Environmental issues are often complex with many different constituents operating according to a broad range of communication techniques. In order to foster negotiations, different perspectives need to be articulated in lucid ways sensitive to various viewpoints and circumstances. In my thesis I investigate how certain approaches to environmental discourse effect dialogue and negotiation. My first two chapters focus on environmental problems surrounding rangeland ecology along the U.S./Mexico border; whereas the last two chapters explore more theoretical conflicts concerning the philosophy of nature. Throughout the thesis I show the significance of nonhumans (prairie dogs, cattle, biological assessment sheets, environmental laws, etc.) in the human community. Only by considering the roles of nonhumans do we broaden and enrich the conversation between ourselves concerning environmental issues.
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Date: December 2002
Creator: Dinneen, Nathan

Rasa: Serenity, Valor, Love

Description: The focus of this thesis is the conveyance of moods through clothes, the communication of feelings through fashion. The thesis illustrates how clothes speak, and the tools used to communicate a visual message. Three moods are used as examples: Serenity, Valor and Love. The thesis presents the author's design ability, creative personality, cultural background and technical skills. Sources of data range from personal experience to books on Cultural Studies, armor and mask making, Indian/ Asian dance and theatre, fabric design, fabric manipulation and websites on related topics. The chapters discuss background information of the author and the topic of research, and present each ensemble created to support the thesis. Through design details and photographs of the nine ensembles, the thesis demonstrates different techniques of achieving visual communication through clothes.
Date: December 2002
Creator: Ganguly, Deepa

Reflections of Revolution: Le Figaro, Le Monde, and Public Opinion in France during the Algerian Conflict (1954-1962)

Description: This thesis is an examination of the printed media in France (1955-1963), as represented by two mainstream newspapers: Le Monde (left-centrist) and Le Figaro (right-centrist). Using these newspapers, as well as Gallup polls recorded at the time, this study explores correlations of what was reported in newspapers and how French public opinion evolved during the course of the war. These two major sources of information are shown to have given contradictory information, thus accounting for some of the paradoxes found in public opinion polls. Specifically, the paradoxes analyzed in the study concern the Front de Libération Nationale (FLN) and the Pieds-Noirs (the European population of North Africa).
Date: December 2002
Creator: Atkins, Michael

The relationship between training in learning style adaptation and successful completion of entry-level community college classes.

Description: The purpose of this study was to determine if there was a relationship between training in learning style adaptation and successful completion of community college courses. The rationale for conducting this study was based on the need for students to learn how to adapt their learning style in order to more effectively learn in any situation. It is also important that community colleges implement strategies that assist in student retention. The learning styles of entry-level community college students were measured using Kolb's Learning Style Inventory Version 3. Students enrolled in entry-level college courses at a small North Texas community college were studied. The Chi-square Test of Independence with a 2 x 2 design was employed. Findings indicated that there was no statistically significant difference in the relationship between students receiving training in learning styles adaptation and successful completion of entry-level college courses, and that students who attended a learning styles training session and those who did not attend a learning styles training session had an equal chance of succeeding in entry-level community college courses. Findings also indicated that students with Accommodating and Assimilating learning styles are less likely to successfully complete an entry-level college course than are students with Diverging or Converging learning styles, yet students with Diverging and Converging learning styles might withdraw from a course rather than risk being unsuccessful. Finally, findings indicated that students who are dissatisfied with the college course and with the instructor of the college course withdraw from college courses.
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Date: December 2002
Creator: Ferrell, Dawn M.

The relationship of personality traits to depression in a geriatric population.

Description: In later life, adverse life events, disability, health problems, inadequate social support, and personality traits hypothesized to be important risk factors for depression. Sample included 35 older (65-84) physical rehabilitation patients in a large metropolitan hospital. Statistical analysis included Pearson Product Moment correlations and multiple regression results. Perceived physical health, instrumental ADLs, life satisfaction, extraversion, and conscientiousness are inversely related to depressive symptom severity; neuroticism is positively related to depressive symptom severity. Regression models predicted depressive symptom severity, PANAS negative effect and PANAS positive affect. Neuroticism, insrumental ADLs, and age are significant predictors of depressive symptom severity; neuroticism and age are signficant predictors of PANAS negative affect, while extraversion is a significant predictor of PANAS positive affect. Personality factors, level of functioning, and age are important factors relating to mood. Limitations of this study include: small sample size with special characteristics (high level of SES); incomplete personal and family history of psychiatric problems; and lack of clinical comparison sample.
Date: December 2002
Creator: Wright, Anna M.

Removal of selected water disinfection byproducts, and MTBE in batch and continuous flow systems using alternative sorbents.

Description: A study was conducted to evaluate the sorption characteristics of six disinfection byproducts (DBPs) on four sorbents. To investigate sorption of volatile organic compounds (VOCs), specially designed experimental batch and continuous flow modules were developed. The investigated compounds included: chloroform, 1,2-dichloroethane (DCE), trichloroethylene (TCE), bromodichloromethane (BDCM), methyl tertiary butyl ether (MTBE), bromate and bromide ions. Sorbents used included light weight aggregate (LWA), an inorganic porous material with unique surface characteristics, Amberlite® XAD-16, a weakly basic anion exchange resin, Amberjet®, a strongly basic anion exchange resin, and granular activated carbon (GAC). Batch experiments were conducted on spiked Milli-Q® and lake water matrices. Results indicate considerable sorption of TCE (68.9%), slight sorption of bromate ions (19%) and no appreciable sorption for the other test compounds on LWA. The sorption of TCE increased to 75.3% in experiments utilizing smaller LWA particle size. LWA could be a viable medium for removal of TCE from contaminated surface or groundwater sites. Amberlite® was found unsuitable for use due to its physical characteristics, and its inability to efficiently remove any of the test compounds. Amberjet® showed an excellent ability to remove the inorganic anions (>99%), and BDCM (96.9%) from aqueous solutions but with considerable elevation of pH. Continuous flow experiments evaluated GAC and Amberjet® with spiked Milli-Q® and tap water matrices. The tested organic compounds were sorbed in the order of their hydrophobicity. Slight elevation of pH was observed during continuous flow experiments, making Amberjet® a viable option for removal of BDCM, bromate and bromide ions from water. The continuous flow experiments showed that GAC is an excellent medium for removal of the tested VOCs and bromate ion. Each of the test compounds showed different breakthrough and saturation points. The unique design of the continuous flow apparatus used in the study proved to be highly beneficial to ...
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Date: December 2002
Creator: Kadry, Ahmed Y.

A Security Model for Mobile Agents using X.509 Proxy Certificates

Description: Mobile agent technology presents an attractive alternative to the client-server paradigm for several network and real-time applications. However, for most applications, the lack of a viable agent security model has limited the adoption of the agent paradigm. This thesis presents a security model for mobile agents based on a security infrastructure for Computational Grids, and specifically, on X.509 Proxy Certificates. Proxy Certificates serve as credentials for Grid applications, and their primary purpose is temporary delegation of authority. Exploiting the similarity between Grid applications and mobile agent applications, this thesis motivates the use of Proxy Certificates as credentials for mobile agents. A new extension for Proxy Certificates is proposed in order to make them suited to mobile agent applications, and mechanisms are presented for agent-to-host authentication, restriction of agent privileges, and secure delegation of authority during spawning of new agents. Finally, the implementation of the proposed security mechanisms as modules within a multi-lingual and modular agent infrastructure, the Distributed Agent Delivery System, is discussed.
Date: December 2002
Creator: Raghunathan, Subhashini

The Segmentation Process and its Influence on Structure in the Malheur Me Bat Masses of Obrecht and Josquin

Description: This study examines in detail the various aspects of the segmentation process as applied by Obrecht and Josquin to the chanson Malheur me bat, especially the effect of this process on the structure of each composer's respective mass. Although musical aspects such as cadences and mode have varying degrees of influence on the structure of these two masses, the primary influence is the establishment of proportional relationships that occur as a result of the segmentation process. Sources of previous music research frequently point out that Obrecht's Mass utilizes both the Phrygian and Aeolian modes, while in Josquin's Mass the Phrygian mode is the firmly established mode throughout. Since segments in Obrecht's Mass are usually not connected to one another, strong cadences frequently occur at the end of the segments throughout. On the other hand, since the segments in Josquin's Mass are usually connected to one another, weak internal cadences frequently occur throughout, with strong cadences reserved for the end of sections.
Date: December 2002
Creator: Jarzombek, Ralph

Server load balancing.

Description: Server load balancing technology has obtained much attention as much business proceeded towards e-commerce. The idea behind is to have set of clustered servers that share the load as against a single server to achieve better performance and throughput. In this problem in lieu of thesis, I propose and evaluate an implementation of a prototype scalable server. The prototype consists of a load-balanced cluster of hosts that collectively accept and service TCP connections. The host IP addresses are advertised using the Round Robin DNS technique, allowing any host to receive requests from any client. Once a client attempts to establish a TCP connection with one of the hosts, a decision is made as to whether or not the connection should be redirected to a different host namely, the host with the lowest number of established connections. This problem in lieu of thesis outlines the history of load balancing, various options available today and finally approach for implementing the prototype and the corresponding findings.
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Date: December 2002
Creator: Kanuri, Jaichandra

Social and Economic Characteristics Related to the Immediate College Transition of Recent High School Graduates: A Study of Southwest Region TRIO Participants' College Continuation

Description: The purpose of this study was to determine whether: 1) Southwest Region TRIO high school students between the years 1991 - 2001 continued to college immediately after high school at rates significantly different than similar population students on national and state levels; and 2) immediate college continuation for this group was a function of social and economic characteristics including race, gender, parental education, and home-care environment. The sample included 414 TRIO program participants from Texas, Oklahoma, New Mexico, Louisiana, and Arkansas. Data on the 414 participants were gathered using an existing database containing demographic and post-secondary enrollment information on study participants. The findings of this study reveal Southwest Region TRIO students during this ten-year period continued to college immediately after high school at rates not significantly different than the national low-income population of students. Results indicate that when compared to all students in the five-state southwest region, the majority low-income, first-generation TRIO population continued to college at rates not significantly different than all-income students in the region. Findings of this study also revealed select social and economic characteristics were not predictors of immediate college continuation for this group. Finally, the study showed out-of-home care environment students continued to college at significantly higher rates than in-home care Southwest Region TRIO students.
Date: December 2002
Creator: Cowan, Charisse L.

Speaking up-speaking out: What does it take to prepare early childhood professionals to advocate for children and families?

Description: The early childhood profession regards advocacy as a professional and ethical responsibility yet little is known about advocacy instructional practices in teacher education programs. This study surveyed selected early childhood teacher educators who currently prepare undergraduate preservice professionals in two- and four-year institutions throughout the United States to identify and evaluate the existing advocacy training practices in preservice education. The study was designed to: (a) determine what leaders in the field of early childhood believe constitutes appropriate advocacy training for preprofessionals, (b) describe the advocacy activities of teacher educators, (c) determine if there is a difference in the advocacy instructional practices of two- and four-year institutions, and (d) recommend a model for advocacy in preprofessional programs. The participants included 607 teacher educators who responded to a mailed questionnaire and 14 leaders of early childhood professional organizations who participated in telephone interviews. Participants represented 48 states and all geographic regions of the United States. Results indicate that teacher educators and leaders believe advocacy instruction is important in preparation programs. The most frequently included advocacy activities are professionalism and understanding the professional role. Advocacy skills and strategies focused on public policy were included the least. Findings show that teacher educators participate in a variety of advocacy activities although few participate in public policy activities. No statistically significant differences were found between two- and four-year institutions in advocacy instructional practices. Based on study data, the researcher developed the Brunson Model for Advocacy Instruction in order to provide the profession with a consistent and sequenced approach to advocacy instruction. Recommendations for future research include: investigation of effective strategies for teaching advocacy; a study of the developmental nature of advocacy; and a study of the Brunson Model for Advocacy Instruction to determine the model's effectiveness in preparing professionals who will have the ability to speak ...
Date: December 2002
Creator: Brunson, Mary Nelle

Stability of Field Emitter Arrays to Oxygen Exposures

Description: The purpose of these experiments was to determine the degradation mechanisms of molybdenum based field emitter arrays to oxygen exposures and to improve the overall reliability. In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. oxygen at 1x10-6 torr was introduced into the chamber through a leak valve for different lengths of time and duty cycles. To ensure identical oxygen exposure and experimental measurement conditions, tips on half the area of the FEA were fully coated with gold and the other half were left uncoated. The emission current from the gold coated half was found to degrade much less than that from the uncoated half, in the presence of oxygen. Also in the absence of oxygen, the emission current recovery for the gold-coated side was much quicker than that for the uncoated side.
Date: December 2002
Creator: Godbole, Soumitra Kumar

Staff Development Methods for Planning Lessons with Integrated Technology

Description: This study compared cooperative and individual staff development methods for planning lessons with integrated technology. Twenty-three teachers from one elementary school participated in the study. The sample was the entire population. Nine participants were assigned to the control group, and fourteen participants were assigned to the experimental group. Names of participants were randomly drawn to determine group assignment. Participants in the control group worked individually in all three staff development sessions, while participants in the experimental group chose a partner, with whom they worked cooperatively in all three staff development sessions. Each participant or pair of participants submitted a lesson plan prior to participation in three staff development sessions. Following the sessions, each participant or pair of participants submitted a lesson plan. Three independent raters rated lesson plans to determine the participants' respective levels on the Level of Technology Implementation Observation Checklist (Moersch, 2001). The ratings of the lesson plans submitted before the training were compared to those collected after the training using a two-by-two mixed model ANOVA. The occasion (pre- vs. post-test), group, and interaction variables were all statistically significant at the .1 level; however, only the occasion variable had a strong effect size. These data suggest that (1) all teachers who participated in the training, whether individually or cooperatively, were able to develop lesson plans at a higher level of technology implementation and (2) cooperative staff development methods had no advantage over individual staff development methods with respect to teachers' ability to write lessons with integrated technology.
Date: December 2002
Creator: Heine, Jennifer Miers