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An Adaptive Linearization Method for a Constraint Satisfaction Problem in Semiconductor Device Design Optimization (open access)

An Adaptive Linearization Method for a Constraint Satisfaction Problem in Semiconductor Device Design Optimization

The device optimization is a very important element in semiconductor technology advancement. Its objective is to find a design point for a semiconductor device so that the optimized design goal meets all specified constraints. As in other engineering fields, a nonlinear optimizer is often used for design optimization. One major drawback of using a nonlinear optimizer is that it can only partially explore the design space and return a local optimal solution. This dissertation provides an adaptive optimization design methodology to allow the designer to explore the design space and obtain a globally optimal solution. One key element of our method is to quickly compute the set of all feasible solutions, also called the acceptability region. We described a polytope-based representation for the acceptability region and an adaptive linearization technique for device performance model approximation. These efficiency enhancements have enabled significant speed-up in estimating acceptability regions and allow acceptability regions to be estimated for a larger class of device design tasks. Our linearization technique also provides an efficient mechanism to guarantee the global accuracy of the computed acceptability region. To visualize the acceptability region, we study the orthogonal projection of high-dimensional convex polytopes and propose an output sensitive algorithm for …
Date: May 1999
Creator: Chang, Chih-Hui, 1967-
System: The UNT Digital Library
Adjustment of Kindergarten Children through Play Sessions Facilitated by Fifth Grade Students Trained in Child-Centered Play Therapy Procedures and Skills (open access)

Adjustment of Kindergarten Children through Play Sessions Facilitated by Fifth Grade Students Trained in Child-Centered Play Therapy Procedures and Skills

This research study investigated the effectiveness of the application of child-centered play therapy procedures and skills by trained fifth grade students in play sessions with kindergarten children who had adjustment difficulties. Specifically, this research determined if play sessions with trained fifth grade students facilitated change in kindergarten children's self concept, internalizing behavior, and externalizing behavior and their parents' stress level.
Date: May 1999
Creator: Baggerly, Jennifer N. (Jennifer Nalini)
System: The UNT Digital Library
Alec Wilder's music for marimba: a performance guide, a lecture recital, together with three recitals of selected works of G. Stout, N. Zivkovic, D. Erb, W. Kraft, K. Abe, W. Penn and others (open access)

Alec Wilder's music for marimba: a performance guide, a lecture recital, together with three recitals of selected works of G. Stout, N. Zivkovic, D. Erb, W. Kraft, K. Abe, W. Penn and others

The intent of this dissertation is to provide a reference guide for any prospective performer of Alec Wilder's four works for marimba: Suite for Solo Guitar (1976), Suite for Trumpet and Marimba (1977), Suite for Flute and Marimba (1977), and Sextet for Marimba and Wind Quintet (1977). The first part of the dissertation provides background information pertaining to Wilder himself, the works for marimba, and theoretical aspects of Wilder's music. The second part addresses specific performance problems contained in the music. The dissertation culminates with the presentation of a performance edition of the marimba part of the previously unedited Sextet. This dissertation will facilitate and enhance future performances of these works. It is hoped that this document will serve to help perpetuate and sustain interest in these important compositions.
Date: May 1999
Creator: Waldrop, Michael Van
System: The UNT Digital Library
An Analysis of a Title I Inclusive Middle School Program in Texas over a Three Year Period: A Case Study (open access)

An Analysis of a Title I Inclusive Middle School Program in Texas over a Three Year Period: A Case Study

The purpose of this study was to describe a Title I inclusion program in a north Texas middle school, to evaluate the degree of its success as a high achieving program, and to analyze how closely it met the requirements of the Improving America's Schools Act of 1994. Data were collected from the learning facilitators and teachers at the middle school with the permission of the school district. This study began with extensive research on the nature of adolescents and the beliefs and characteristics of high achieving middle schools. It addressed the steps which were recommended in the literature to improve middle schools and benefit students that are at-risk of failing to master the curriculum at their grade level. The researcher concluded by reporting effective strategies being used in middle school at-risk programs. These are strategies noted by experts as successful in identified programs. The population for this study was seventh and eighth grade Title I students who attended middle school during the 1992-1993, 1993-1994, 1994-1995 and 1995-1996 school years. The data collected by the researcher are presented in two parts: the description of the Title I inclusion program; and the results of the Texas Assessment of Academic Skills tests …
Date: May 1999
Creator: Restivo, Janet DiMaria
System: The UNT Digital Library
An Analysis of Program Options for Gifted Middle School Students (open access)

An Analysis of Program Options for Gifted Middle School Students

The purpose of this study was to compare three different types of programming options for identified gifted and talented middle school students.
Date: May 1999
Creator: Curry, Brenda Lierin
System: The UNT Digital Library
An Analysis of Status: Women in Texas, 1860-1920 (open access)

An Analysis of Status: Women in Texas, 1860-1920

This study examined the status of women in Texas from 1860 to 1920. Age, family structure and composition, occupation, educational level, places of birth, wealth, and geographical persistence are used as the measurements of status. For purposes of analysis, women are grouped according to whether they were married, widowed, divorced, or single.
Date: May 1999
Creator: Breashears, Margaret Herbst
System: The UNT Digital Library
Analyzing the Financial Condition of Higher Education Institutions Using Financial Ratio Analysis (open access)

Analyzing the Financial Condition of Higher Education Institutions Using Financial Ratio Analysis

The problem concerned the financial indicators used to evaluate the financial condition of the six sister higher education institutions under the authority of the Board of Regents of Oklahoma Colleges. The purposes were to determine the financial ratios that best indicate financial condition; to calculate those financial ratios for the six designated Oklahoma higher education institutions; and to evaluate and compare the financial condition of the six institutions. This study attempted to further the use of financial ratio analysis as an objective addition to subjective studies that examine an institution's definition of its mission, objectives, and goals and its own assessment of the degree to which its resources allow it to attain those goals. The data were obtained from the Integrated Postsecondary Education Data System; the financial reports were audited by independent certified public accountants and presented to the Board of Regents of Oklahoma Colleges; and John Minter Associates, Inc., provided the national norms. The set of financial ratios identified provides a means to study a single higher education institution through trend analysis and in comparison to national norms. It also works well with a sample of homogeneous institutions with interinstitutional comparison. The techniques are intended to provide a general …
Date: May 1999
Creator: Buddy, Nancy J.
System: The UNT Digital Library
The Anglo-American Council on Productivity: 1948-1952 British Productivity and the Marshall Plan (open access)

The Anglo-American Council on Productivity: 1948-1952 British Productivity and the Marshall Plan

The United Kingdom's postwar economic recovery and the usefulness of Marshall Plan aid depended heavily on a rapid increase in exports by the country's manufacturing industries. American aid administrators, however, shocked to discover the British industry's inability to respond to the country's urgent need, insisted on aggressive action to improve productivity. In partial response, a joint venture, called the Anglo-American Council on Productivity (AACP), arranged for sixty-six teams involving nearly one thousand people to visit U.S. factories and bring back productivity improvement ideas. Analyses of team recommendations, and a brief review of the country's industrial history, offer compelling insights into the problems of relative industrial decline. This dissertation attempts to assess the reasons for British industry's inability to respond to the country's economic emergency or to maintain its competitive position faced with the challenge of newer industrializing countries.
Date: May 1999
Creator: Gottwald, Carl H.
System: The UNT Digital Library
The Applicability of SERVPERF in Judging Service Quality for Biomedical Information Professionals (open access)

The Applicability of SERVPERF in Judging Service Quality for Biomedical Information Professionals

The applicability of SERVPERF as a tool for judging the quality of services used by biomedical information professionals was tested using standard statistical procedures. Data was gathered nationally via a combination of electronic and non-electronic forms, from Area Health Education Center (AHEC) information professionals and the results consolidated to provide information for the study. It was determined that SERVPERF was applicable in making judgements about service quality for AHEC information professionals. Their perceptions about service quality tended to have a greater influence than did their level of actual satisfaction on whether or not they planned to use a particular service in the future. There is currently no validated tool available to ascertain the quality of services offered to these valuable members of the rural health care team. This dissertation proposes to provide such a tool, and to serve as a guide or template for other professionals seeking a means to judge service quality in their own disciplines.
Date: May 1999
Creator: Jenkins, Sharon D. (Sharon Dezel)
System: The UNT Digital Library
Assembly of Pseudomonas putida Aspartate Transcarbamoylase and Possible Roles of the PyrC' Polypeptide in the Folding of the Dodecameric Enzyme (open access)

Assembly of Pseudomonas putida Aspartate Transcarbamoylase and Possible Roles of the PyrC' Polypeptide in the Folding of the Dodecameric Enzyme

Aspartate transcarbamoylase (ATCase) of Pseudomonas putida consists of two different polypeptides, PyrB and PyrC' (Schurr et al, 1995). The role of the PyrC' and the assembly of PyrB and PyrC' have been studied. The ATCase made in vitro of P.putida PyrB with P.putida PyrC', and of E.coli PyrB with P.putida PyrC ' were generated under two different conditions, denaturation and renaturation, and untreated. It was found that PyrC' plays a role in the enzymatic regulation by ATP, CTP and UTP. In addition to playing a role in substrate binding, the PyrB polypeptide is also involved in effector binding (Kumar et al., manuscript in preparation). The most energetically preferred form of the P.putida WT is a dodecamer with a molecular mass of 480 kDa. The ratio between the PyrB and the PyrC' is 1:1. In studies of nucleotide binding, it was discovered that the P.putida PyrB was phosphorylated by a protein kinase in the cell extract. In the presence of 20 mM EDTA, this phosphorylation was inhibited and the inhibition could be overcome by the addition of divalent cations such as Zn2+ and Mg2+. This result suggested that the phosphorylation reaction required divalent cations. In the CAD complex of eukaryotes, phosphorylations …
Date: May 1999
Creator: Hongsthong, Apiradee, 1970-
System: The UNT Digital Library
Assessment and Analysis of Per Pupil Expenditures: a Study Testing a Micro-Financial Model in Equity and Student Outcome Determination (open access)

Assessment and Analysis of Per Pupil Expenditures: a Study Testing a Micro-Financial Model in Equity and Student Outcome Determination

The purpose of this study was to examine district level financial data to assess equity across districts, to compare equity benchmarks established in the literature using selected functions from the state's financial database, and to determine the predictive value of those functions to the Texas Assessment of Academic Skills (TAAS) tests of 1997.
Date: May 1999
Creator: Holsomback, James Richard
System: The UNT Digital Library
Attribution to Deviant and Nondeviant Social Roles (open access)

Attribution to Deviant and Nondeviant Social Roles

A questionnaire was used to study causal attribution to social roles as influenced by perceived deviance of the role, instructions to identify with the role, and participant gender. The perceived deviance or nondeviance of the roles was determined by a pilot study. The roles were varied randomly through 12 hypothetical events, and identification or nonidentification instructions randomly assigned. The participants were 194 male and female university students. Participants gave the cause of each event and rated the cause on five dimensions: internality, externality, stability, globality, and controllability. Causal attribution to deviant social roles was found to result in a significantly higher across-scales score and to be more internal, less external, and more global than attribution to nondeviant roles. Participant gender showed an interaction with deviance overall and on the dimensions of stability and globality due to significantly higher ratings by women participants than those by men. Identification instructions did not produce a significant effect.
Date: May 1999
Creator: Rohlman, James E.
System: The UNT Digital Library
Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces (open access)

Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces

The south-central United States serves as an important biogeographical link and dispersal corridor between Nearctic and Neotropical elements of western hemisphere odonate faunas. Its species are reasonably well known because of substantial collections, but there has been no concerted effort to document the extent of biodiversity and possible geographic affinities of dragonflies and damselflies of this region. The recent discoveries of Argia leonorae Garrison, Gomphus gonzalezi Dunkle and Erpetogomphus heterodon Garrison from southern and western Texas and northern Mexico suggest that Odonata species remain to be discovered in this area, particularly from far south Texas and northern Mexico. I have documented a total of 12,515 records of Odonata found in 408 counties within the south-central U.S. A total of 73 species of damselflies and 160 species of dragonflies was revealed in the region. The 233 (197 in Texas) Odonata species are distributed among 10 families and 66 genera. Illustrated family, generic, and species-level keys are provided. Since the beginning of this work in the Fall of 1993, one species has been added each to the Louisiana and Oklahoma faunas, and 12 species have been added, previously unreported from Texas, including four new to the U.S. The area of highest Odonata …
Date: May 1999
Creator: Abbott, John C.
System: The UNT Digital Library
Chaucer and the Rhetorical Limits of Exemplary Literature (open access)

Chaucer and the Rhetorical Limits of Exemplary Literature

Though much has been made of Chaucer's saintly characters, relatively little has been made of Chaucer's approach to hagiography. While strictly speaking Chaucer produced only one true saint's life (the Second Nun's Tale), he was repeatedly intrigued and challenged by exemplary literature. The few studies of Chaucer's use of hagiography have tended to claim either his complete orthodoxy as hagiographer, or his outright parody of the genre. My study mediates the orthodoxy/parody split by viewing Chaucer as a serious, but self-conscious, hagiographer, one who experimented with the possibilities of exemplary narrative and explored the rhetorical tensions intrinsic to the genre, namely the tensions between transcendence and imminence, reverence and identification, and epideictic deliberative discourse.
Date: May 1999
Creator: Youmans, Karen DeMent
System: The UNT Digital Library
Client/Server Systems Performance Evaluation Measures Use and Importance: a Multi-Site Case Study of Traditional Performance Measures Applied to the Client/Server Environment (open access)

Client/Server Systems Performance Evaluation Measures Use and Importance: a Multi-Site Case Study of Traditional Performance Measures Applied to the Client/Server Environment

This study examines the role of traditional computing performance measures when used in a client/server system (C/SS) environment. It also evaluates the effectiveness of traditional computing measures of mainframe systems for use in C/SS. The underlying problem was the lack of knowledge about how performance measures are aligned with key business goals and strategies. This research study has identified and evaluated client/server performance measurements' importance in establishing an effective performance evaluation system. More specifically, this research enables an organization to do the following: (1) compare the relative states of development or importance of performance measures, (2) identify performance measures with the highest priority for future development, (3) contrast the views of different organizations regarding the current or desired states of development or relative importance of these performance measures.
Date: May 1999
Creator: Posey, Orlando Guy
System: The UNT Digital Library
Cognitive Interference in the Perception of Pitch and Loudness in a Five-note Musical Pattern (open access)

Cognitive Interference in the Perception of Pitch and Loudness in a Five-note Musical Pattern

The purpose of the study was to explore whether musicians experience Garner interference among the auditory dimensions of pitch and loudness. Specifically, the study explored whether the dimensions of intonation and loudness, when presented to musicians in a five-note musical pattern, were perceived as integral or separable in nature.
Date: May 1999
Creator: Cattley, Gary Thomas
System: The UNT Digital Library
A Comparative Analysis of Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with Child Witnesses of Domestic Violence (open access)

A Comparative Analysis of Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with Child Witnesses of Domestic Violence

This study was designed to determine the effectiveness of intensive sibling group play therapy in: (a) improving the self-concept of child witnesses of domestic violence; (b) reducing internalizing behavior problems, such as withdrawal, somatic complaints, anxiety and depression, of child witnesses of domestic violence; (c) reducing externalizing behavior problems, such as aggression and delinquency, of child witnesses of domestic violence; and (d) reducing overall behavior problems of child witnesses of domestic violence. A second objective of this study was to compare the effectiveness of intensive sibling group play therapy and intensive individual play therapy on the above identified dimensions.
Date: May 1999
Creator: Tyndall-Lind, Ashley
System: The UNT Digital Library
Comparative Biochemistry and Evolution of Aspartate Transcarbamoylase from Diverse Bacteria (open access)

Comparative Biochemistry and Evolution of Aspartate Transcarbamoylase from Diverse Bacteria

Aspartate transcarbamoylase (ATCase) catalyzes the first committed step in pyrimidine biosynthesis. Bacterial ATCases are divided into three classes, A, B and C. Class A ATCases are largest at 450-500, are. dodecamers and represented by Pseudomonas ATCase. The overlapping pyrBC' genes encode the Pseudomonases ATCase, which is active only as a 480 kDa dodecamer and requires an inactive pyrC'-encoded DHOase for ATCase activity. ATCase has been studied in two non-pathogenic members of Mycobacterium, M. smegmatis and M. phlei. Their ATCases are dodecamers of molecular weight 480 kDa, composed of six PyrB and six PyrC polypeptides. Unlike the Pseudomonas ATCase, the PyrC polypeptide in these mycobacteria encodes an active DHOase. Moreover, the ATCase: DHOase complex in M. smegmatis is active both as the native 480 kDa and as a 390 kDa complex. The latter lacks two PyrC polypeptides yet retains ATCase activity. The ATCase from M. phlei is similar, except that it is active as the native 480 kDa form but also as 450,410 and 380 kDa forms. These complexes lack one, two, and three PyrC polypeptides, respectively. By contrast,.ATCases from pathogenic mycobacteria are active only at 480 kDa. Mycobacterial ATCases contain active DHOases and accordingly. are placed in class A1 . …
Date: May 1999
Creator: Hooshdaran, Massoumeh Ziba
System: The UNT Digital Library
Continuity Expectations in Vertical Marketing Systems: a Dyadic Perspective of Domestic and International Franchising (open access)

Continuity Expectations in Vertical Marketing Systems: a Dyadic Perspective of Domestic and International Franchising

An emerging paradigm shift in the marketing discipline has prompted renewed research interest in the nature and scope of exchange. A common theme in the research to date is a departure from the traditional transactional orientation to a relational perspective of exchange. The relational emphasis is particularly germane to contractual Vertical Marketing Systems (VMS) where the emphasis is on long-term, mutually beneficial interaction between various channel members. The franchisor-franchisee relationship, a type of contractual VMS, is governed by norms that impact system efficiency and effectiveness. Despite the unprecedented growth of international franchising systems in the marketplace, a paucity of empirical attention has focused on cross-national franchisor-franchisee relationships. With many U.S.-based business format franchisors penetrating foreign markets, the primary purpose of the dissertation is to provide insights into tools which franchisors, and franchisees can use during the evolution of the exchange relationship. To identify differences across geographic boundaries, the dissertation simultaneously studies domestic and cross-border franchisor-franchisee relationships.
Date: May 1999
Creator: Mehta, Sanjay S. (Sanjay Subhash)
System: The UNT Digital Library
Cultural Influences on the ABC Implementation Under Thailand's Environment (open access)

Cultural Influences on the ABC Implementation Under Thailand's Environment

This study examines the influences of culture on the implementation of a U.S.-based Activity-Based Costing (ABC) in three Thai organizations.
Date: May 1999
Creator: Morakul, Supitcha
System: The UNT Digital Library
Development and Validation of the Checklist for Differential Diagnosis of Attentional Problems (open access)

Development and Validation of the Checklist for Differential Diagnosis of Attentional Problems

The current study discussed the development and validation of the Checklist for Differential Diagnosis of Attentional Problems (CDDAP), a tool for use with adults seeking diagnosis and treatment of an Attention Deficit Hyperactivity Disorder. Normative data are provided on three subject groups (ADHD adults, controls, and adults with other psychiatric disorders). Convergent validity was established with the SCL-90, and criterion validity established through comparing scaled scores with final diagnoses. Overall, this measure was accurate at differentiating adults with ADHD from controls and adults with other psychiatric disorders. Results indicated that the CDDAP was also able to identify other psychiatric disorders with 71 to 92% accuracy, depending on the disorder.
Date: May 1999
Creator: Taylor, Cindy J.
System: The UNT Digital Library

A Different Drummer: A Chamber Opera

Access: Use of this item is restricted to the UNT Community
A Different Drummer is a chamber opera adaptation of Donald Davis's story "A Different Drummer" from his collection Listening for the Crack of Dawn, published by August House. The opera lasts about seventy minutes, and calls for a cast of three and an orchestra of sixteen players. It contains a prologue, epilogue and four scenes in a single act. The score is prefaced by a paper describing the musical strategies employed in setting the story as an opera. Three chapters describe the adaptation from short story to opera, the essential musical elements, and details of the application of the musical elements in each scene of the opera. The libretto is presented in the fourth chapter.
Date: May 1999
Creator: Friedman, Arnold Jacob
System: The UNT Digital Library
The Effect of Quality and Color Visual Aids on Immediate Recall, Attitude Toward Speaker, and Attitude Toward Speech (open access)

The Effect of Quality and Color Visual Aids on Immediate Recall, Attitude Toward Speaker, and Attitude Toward Speech

Thirty years of empirical research on visual aids have produced inconsistent results--perhaps because the quality and color of those visuals were inconsistent. The purpose of this study was to determine what effects quality and color of instructional transparencies used in an informative speech have on listener recall and attitudes toward speaker and speech. A total of 709 community college and university students in 36 intact classes were randomly assigned to one of four visual treatment groups (poor-quality black/white, high-quality black/white, poor-quality color, or high-quality color) or one of two control groups (no-speech or no-visuals). A videotaped speech was projected onto a large screen at the right of the room; visual aids (each shown for approximately 30 seconds) were projected onto another screen set immediately to the left. Recall was measured by a 10-item multiple choice test; attitude toward speech and speaker were each measured by six seven-item semantic differential scales. Analysis of variance indicated that the type of transparencies used in an informative speech have a definite effect on immediate recall and attitude toward the speech, but no effect on attitude toward speaker. All four treatment groups scored significantly higher on recall than the no-speech and no-visual control groups. Log …
Date: May 1999
Creator: Hamilton, Cheryl A. (Cheryl Ann)
System: The UNT Digital Library
The Effectiveness of Say It Straight Communications Training With Adults in Outpatient Chemical Dependency Treatment (open access)

The Effectiveness of Say It Straight Communications Training With Adults in Outpatient Chemical Dependency Treatment

The study compared an experimental group (n=26) who participated in weekly SIS sessions as an adjunct to existing treatment protocols for a period of 6-8 weeks, to a control group (n=14) who matriculated in treatment without the addition of SIS training for a period of 6-8 weeks. Subjects completed a battery of questionnaires at the beginning of the measurement period and at the end of the measurement period. The SASSI-2, The McMaster Family Assessment Device (FAD), and the Rotter Internal-External Locus of Control Scale were used to measure groups on recovery related variables at Pre-Test and Post-Test. Results demonstrated a consistent pattern of improvement over the time measure. The results of the interaction of group and time demonstrated a pattern of gains which did not reach statistical significance, partially as an artifact of the small sample size. An investigation of effect sizes was conducted to detect the effect of SIS training. The training was found to have a moderate effect size, which was consistent with other research using SIS training. Some areas for possible future research were addressed.
Date: May 1999
Creator: Hardy, Rebecca B. (Rebecca Biggerstaff)
System: The UNT Digital Library