The growth mechanism of chemical vapor deposition (CVD) grown homo-epitaxial diamond (110) and (111) films was studied using ultrahigh vacuum (UHV) scanning tunneling microscopy (STM). In addition, the field emission properties of diamond coated molybdenum microtips were studied as a function of exposure to different gases.

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.

This study sought to determine if different factors had influenced females and males to select engineering/science-related studies at the Texas Academy of Mathematics and Science (TAMS). The data were collected in the fall semester in 1997 at TAMS located on the University of North Texas campus from a survey of factors reported in the literature that had influenced students to enroll in engineering/science-related curriculum.

The purposes of the investigation were to determine if status of professional sports and professional athletes increases as male participation increases, if perceived status of 'athlete' increases with participation in sports that contain 'male' attributes, and if gender differences are related to status indicators. Sixty-eight students were administered a status-determinants questionnaire. A one-way ANOVA (gender) and a 2 x 12 ANOVA (gender x sport) were employed to determine status ratings of sports. A 3 x 2 (increase/decrease/no change x gender) Chi square was employed to determine status of sports, perceived masculinity of males/femininity of females, and status of the athlete related to gender attributes of sports.

The goal of this study is to increase understanding of information problems as they are revealed in interactions among users and search intermediaries during information retrieval. Specifically, this study seeks to investigate: (a) how interaction between users and search intermediaries reveals aspects of user information problems; (b) to explore the concept of representation with respect to information problems in interactive information retrieval; and (c) how user and search intermediaries focus on aspects of user information problems during the course of searches. This project extends research on interactive information retrieval, and presents a theoretical framework that synthesizes rational and non-rational questions concerning mental representation as it pertains to user's understanding of information problems.

The focus of the problem was to challenge the more traditional. Western approaches to jewelry as adornment in respect to areas such as placement and scale. Approaching adornment as sculptural forms interacting with the human body could possibly challenge the individual's awareness of jewelry as wearable art. This approach brought up the issue of using the human body as a pedestal for adornment.

My work attempted to examine the emotional and psychological relationships between humans and the relationship of a human being with their inner self. I adopted the human figure as a potentially successful means of expressing these relationships. The language or symbolism I used in my work was derived directly from body language. This universal language is direct and immediate. Body language, posture, attitude, and tension of the figure are primary perceptions observed by the viewer. The immediacy of communication and directness of emotions through the use of body language were my main concerns. The major issue I dealt with was trying to invest those same emotions into my sculpture. My intention was to endow the sculpture, which consisted of a static unchanging pose and was created from an inert material, with a recognizable emotion and expressiveness that the human figure inherently carries.

While I worked, I made a number of pieces that followed a common theme, each relating to the piece made before and after. This way of working revealed new possibilities for expression. During this particular body of work, I explored a specific series of forms that could be used in the preparation and presentation of food and drink.

The goal of this study was to construct a body of work encompassing a broad range of wheel thrown functional pots that are accented with hand built additions. I produced a total of forty pieces developed from four forms representing a respective increase in scale. I addressed technical and aesthetic issues during the process. These included glaze combinations, variations of established hand built additions, surface decoration, and form/shape manipulation.

My objective was to create a body of work using various printing processes. I wanted to communicate my emotional responses to the fertility and childbearing of older women. I wanted to address the realities that become problems for women who wait to have children at an older age and related feelings. Some of these problems were infertility, early menopause, "sticky eggs," and birth defects. There are current medical practices that help these problems such as the freezing of eggs, artificial insemination, and multiple births. I wanted to incorporate ideas about the panic I began to feel about having a child at an older age and my frustration over the lack of open discussion about such feelings. I have combined the use of realism and abstraction in my work. I included dyed and torn paper to lend organic and tactile qualities to the humanistic subject matter. The end result has consisted of various forms of collage and an assembly of the dyed, torn and printed paper.

Standard psychological assessment instruments have not produced consistent results by which decisions can be made regarding the appropriate placement and legal disposition of an individual who has committed a sexual offense. The purpose of the present study was to systematically investigate deception and dissimulation as measured by three assessment instruments commonly utilized with sex offenders. A denial classification system was utilized in order to classify offenders into categories based on their level of admission to the legal system. The four group classification system did not produce significant differences on all measures of deception and dissimulation. Contrary to previous research, admitters were found to respond more defensively than deniers on one of the assessment instruments. In addition, partial deniers were identified as responding significantly differently from both admitters and deniers on a separate instrument. The differences found suggest that sex offenders' level of deception is multifaceted. Difficulties in identifying classificatory strategies and implications for theoretical conceptions of denial within this population are discussed.

This study is concerned with the impact of job insecurity on the vital social exchange relationship between employee and employer. Specifically, it explored the relationship between job insecurity and two important social exchange outcomes—organizational commitment and organizational citizenship behavior. Moreover, it assessed the moderating effects of individual factors (communal orientation and powerlessness) and situational factors (trust in management, procedural fairness, and organizational support) on these relationships.

The purpose of this project is to produce a complete and thorough notebook that may be used to supplement laboratory coursework. Its intent is to be used primarily by the students to aid them in understanding background information and the proper laboratory procedures involved in various types of experiments. The laboratory notebook is a summation of all the experiments and procedures used in the six-credit hour Advanced Microbial and Molecular Biology (BIOL 5160) course offered during the summer semester at the University of North Texas. This class is a team taught effort by Professors O'Donovan and Kunz. The course is constructed as an intensive practice exercise to teach the student about gene mutations, biosynthetic pathways, preparation and analysis of plasmid DNA, and many other topics included in the notebook.

The purpose of this study was to determine whether there were differences in the levels of awareness and perception concerning distance education among the leadership at the seven campuses of the Texas State Technical College (TSTC) System.

Detection, identification and separation of polycyclic aromatic compounds in environmental samples are of extreme importance since many of these compounds are well known for their potential carcinogenic and/or mutagenic activities. Selective quenching of molecular fluorescence can be utilized effectively to analyze mixtures containing different polycyclic aromatic hydrocarbons. Molecularly organized assemblies are used widely in detection and separation of these compounds mainly because of less toxicity and enhanced solubilization capabilities associated with these media. Feasibility of using nitromethane and the alkylpyridinium cation as selective fluorescence quenching agents for discriminating between alternant versus nonalternant polycyclic aromatic hydrocarbons (PAHs) is critically examined in several molecularly organized micellar solvent media. Fluorescence quenching is used to probe the structural features in mixed micelles containing the various combinations of anionic, cationic, nonionic and zwitterionic surfactants. Experimental results provide valuable information regarding molecular interactions between the dissimilar surfactants.

This dissertation proposes that the Sonatine broadly unfolds a kinetic structure that stems from the traditional tension-relief model and, consequently, its dependence on tradition proves much deeper than Boulez would acknowledge.

The effect of the Civil War and Reconstruction on the southern planter elite remains a topic of interest to historians. Did the war ruin the planter class? Or, did they maintain economic, geographic, or social persistence? This study focuses on the persistence from 1850 to 1880 of five East Texas large planter families who owned one hundred or more slaves in 1860. An analysis of data primarily from county, state, and federal records formthe basis of this study. Four families persisted as wealthy influential members of their postbellum communities. One family remained geographically persistent but not wealthy. The experiences of these families suggest that large East Texas planter families found it possible to persist in spite of the Civil War and Reconstruction.

A behavioral model for acute responses in bivalves, was developed using time series analysis for use in a real-time biomonitoring unit. Stressed bivalves closed their shell and waited for the stressful conditions to pass. Baseline data showed that group behavior of fifteen bivalves was periodic, however, individuals behaved independently. Group behavior did not change over a period of 20 minutes more than 30 percent, however, following toxic exposures the group behavior changed by more than 30 percent within 20 minutes. Behavior was mathematically modeled using autoregression to compare current and past behavior. A logical alarm applied to the behavior model determined when organisms were stressed. The ability to disseminate data collected in real time via the Internet was demonstrated.

This thesis examines the letters, proclamations, and addresses of the four presidents of the Republic of Texas, David G. Burnet, Sam Houston, Mirabeau B. Lamar, and Anson Jones, to determine how these men faced the major crises of Texas and shaped policy regarding land, relations with Native Americans, finances, internal improvements, annexation by the United States, and foreign relations. Research materials include manuscript and published speeches and letters, diaries, and secondary materials.

Electrodermal responding (EDR) and heart rate (HR) were assessed for seven subjects participating in a reaction time task consequated with monetary bonuses (250, 100, and 10), monetary penalties (250,100, and 10), and a monetary neutral value (00). Unlike previous research employing group designs and a tonic measure (i.e., mean over long periods of time), this study utilized a single-subject design and a phasic measure (i.e., mean over 2-s intervals). Heart rate data was too variable for meaningful analysis. EDR data showed that the peak levels of EDR were higher for penalties than for the corresponding values of bonuses (e.g., -250 vs. +250) for most subjects. Similarly, peak levels of EDR were generally higher during sessions in which consequences were presented than in sessions during which consequences were absent.

The preparation of layered double hydroxides via titration with sodium hydroxide was thoroughly investigated for a number of M(II)/M(III) combinations. These titration curves were examined and used to calculate nominal solubility product constants and other thermodynamic quantities for the various LDH chloride systems.

The purpose of this study was to determine the test-retest reliability of the Revised Conners' Parent Rating Scale. The Conners' Parent Rating Scale (CPRS-48) was administered to 59 elementary school children between the ages of 5 and 10 years. After a period of two weeks, the same children were re-tested with the CPRS-48. The results of this research lend support to the integrity of the test-retest reliability of the CPRS-48. The need for further psychometric studies on the Conners' Scales is noted.

The purpose of this study was to examine the use of computer and communications technologies at four-year public/private college and university career centers that are members of the Southwest Association of Colleges and Employers (SWACE). The findings of this study reveal that (a) all career centers are now using computer and telecommunications technologies for at least one office function; (b) small institutions do not use technologies as much as large institutions because they have fewer financial resources, less technical support from institutions, fewer personnel, and they also need time to learn to use technologies effectively; (c) public career centers are more willing to explore new technologies but private career centers mostly adopt and implement proven technologies; (d) career education does not utilize technologies as much as career counseling or job placement functions; (e) lack of financial resources and lack of technical support are major barriers to a technological infusion; and (f) technologies, including electronic student databases, computerized presentations with the network connection, and OCR scanners, will be needed in the near future.

This study was a follow up to P. C. Dams' (1996) unpublished University of North Texas masters thesis, The effect of defect probability during training on inspection accuracy in a quality control simulation. Graphics of computer circuit boards were presented in dyads with an error free sample on the left and a comparison on the right. Comparisons had either a rotation or transposition defect, or were error free. Subjects had 10-s to accept or reject the comparison as identical to the sample. They were trained using two different stimulus fading procedures (using descending defect probabilities) and immediate feedback. Defect probabilities for the Tens were 0.60, 0.50, 0.40, and 0.30 and for the Twenties were 1.00, 0.80, 0.60, and 0.40. The last 4 pretraining and posttraining sessions were compared and the posttraining performance of the Twenties, as compared to the Tens, demonstrated greater improvement over pretraining performance. No firm conclusions could be drawn as to the effectiveness of either training procedure. The significance of the current investigation and suggestions for future research are discussed.