Criteria for the confinement of plasmas consisting of a positive and negative component in Penning type traps with nested electric potential wells are presented. Computational techniques for the self-consistent calculation of potential and plasma density distributions are developed. Analyses are presented of the use of nested well Penning traps for several applications. The analyses include: calculations of timescales relevant to the applications, e.g. reaction, confinement and relaxation timescales, self-consistent computations, and consideration of other physical phenomenon important to the applications. Possible applications of a nested well penning trap include production of high charge state ions, studies of high charge state ions, and production of antihydrogen. In addition the properties of a modified Penning trap consisting of an electric potential well applied along a radial magnetic field are explored.

This dissertation draws some of the innovative composers from the early 1900's to the 1960's into the spotlight to highlight their new musical and pianistic ideas. These composers, including Debussy, Schoenberg, Webern, Bartók, Cowell and others, brought new creative forces into piano music, generating many distinctive features of modern music. The discussion of new resources in harmonic language, timbre, texture, form and concept of time has a direct bearing on aspects of Richard Wilson's Eclogue itself as well as aspects of performance problems. American Composer, Richard Wilson, has written three substantial piano solo works, Eclogue, Fixations, and Intercalations. Eclogue, from 1974, is a one-movement work. The detailed analysis of Eclogue covers aspects of form, harmonic language, timbre and texture, and rhythm and time. In addition, essential issues of performance problems such as notation, rhythmic control, extended techniques, hands distribution, and pedaling are also discussed.

The purpose of this study was to identify and explore personality characteristics of juvenile delinquents, to compare those characteristics with those of the general population, and determine if there are significant differences, as measured by the Myers-Briggs Type Indicator (MBTI), between the personality characteristics of juvenile delinquents and the general population. Juvenile delinquents who were adjudicated into a Texas Youth Commission facility in North Texas were subjects for this study. Participants included 186 males who ranged in age from 14 years to 20 years. Statistical analyses were performed for each of the research questions. When comparing MBTI scores of juvenile delinquents to the general population, significant differences were found on the dichotomous scales, temperaments, function pairs, and types. All type preferences are represented within the juvenile delinquent population. The MBTI can be useful in responding to the education and rehabilitation needs of juvenile delinquents. Knowledge of personality type can help caregivers meet the needs of juvenile delinquents. Understanding personality type preference can serve to provide a deeper understanding of the behaviors that lead to adjudication of juvenile delinquents. A discovery of the types of adolescents who are adjudicated could lead to preventive measures, early detection, and early intervention for students …

This study examines pre-service teachers' attitudes toward language diversity and linguistically diverse students. Two hundred seventy-one teacher education students were surveyed to determine relative effects of demographic, mediating variables and psychosocial variables on language attitude as measured by the Language Attitudes of Teachers Scale (LATS). Independent variables include gender, age, race/ethnicity, teacher certification sought, region, psychological insecurity, cognitive sophistication, and helpfulness viewpoint. Research questions are established and methodology is outlined. A review of related literature places the study in the context of research with a broad interdisciplinary perspective and then links the study to other research relevant to the field of education. The findings of the study indicate that gender, race/ethnicity, teacher certification sought, political ideology, psychological insecurity, and cognitive sophistication contribute significantly to the variation found in attitude toward language diversity. The paper concludes with analyses and discussions of the significant variables and suggestions for application in teacher preparation.

This study examined the prevalence of undiagnosed dissociative disorders in a sample of 201 adult patients admitted to a private psychiatric hospital in a major metropolitan city in the south-central United States, over an eight-month period. A screening measure, two blind structured interviews, and a blind clinical interview were employed. The lifetime prevalence of dissociate disorders among the interviewed subjects was 40.8%. More specifically, 7.5% were diagnosed with dissociative identity disorder, 15.4% with dissociative disorder not otherwise specified, 13.4% with dissociative amnesia, and 4.5% with depersonalization disorder. Dissociative fugue was not found in this sample. Cohen's kappa reliability coefficients were computed between the three interview measures, resulting in significant findings for the presence of dissociative identity disorder and dissociative disorder not otherwise specified versus no dissociative disorder. The Cohen's kappa reliability coefficients were as follows: DDIS-DES-T = 0.81; SCID-D-DES-T = 0.76; Clinician-DES-T = 0.74, DDIS-SCID-D = 0.74; DDIS-Clinician = 0.71, and SCID-D-Clinician = 0.56. A meeting was conducted at the end of all subject interviews to discuss discrepant findings between measures. Four additional sub-analyses were performed between dissociative and non-dissociative subjects on DSM-IV variables. Patients diagnosed with a dissociative disorder had higher rates of comorbid major depressive disorder, borderline personality …

Paenibacillus velaei, sp. nov. is a soil bacterium capable of producing an unusually large amount of exopolysaccharide (EPS). The EPS contains glucose, mannose, galactose and fucose in a molar ratio of 4:2:1:1. The molecular weight of the EPS is higher than 2x106. The viscosity of 1% EPS is 1300 cP when measured at a shear rate of 1 sec-1. Physiological parameters for optimal production of the EPS were studied and it was found that 1.4 g dry weight per 1 l of medium was produced when the bacteria were grown at 30EC and the pH adjusted at 7± 0.2 in a medium containing glucose as the carbon source. Growing the bacteria on different carbon sources did not alter the quantity or the composition of the EPS produced. No toxicity effects were observed in mice or rats when EPS was administered in amounts ranging from 20 to 200 mg per kg body weight. The data obtained from physical, chemical and biological properties suggest that the EPS may be employed in several industrial and environmental applications. It is an excellent emulsifier, it holds 100 times its own weight in water, it is not toxic, and it can be used to remove mercury, …

Mutations in BRCA1 and BRCA2, the first two breast cancer susceptibility genes identified, carry as much as an 85% lifetime risk of developing breast, ovarian or other cancers. Genetic testing for mutations in these two genes has recently become commercially available. There have been varying amounts of psychological distress noted among women with a family history of breast cancer. Distress has been observed to impact psychological functioning, activities of daily living, and the practice of breast cancer surveillance behaviors. Within the genetic screening process, psychological distress has been shown to impact the decision to undergo genetic screening, the comprehension and retention of risk assessment information, as well as affecting the subject following the receipt of the genetic test results. Little work has been done to examine predictors of distress within at risk subjects. This study examines psychological distress among 52 community women presenting for BRCA1 and BRCA2 genetic mutation testing. Predictors of distress included family cancer history, education, age, Ashkenazi ethnicity, and Internality and Powerful Others Health Locus of Control. Vulnerable sub-groups of patients include younger women, women with higher levels of education and women of Ashkenazi ethnicity.

My dissertation examines the roles of Emily and Anne Brontë as nineteenth-century women poets, composing in a literary form dominated by androcentric language and metaphor. The work of Mikhail Bakhtin, particularly concerning spoken and implied dialogue, and feminists who have pioneered an exploration of feminist dialogics provide crucial tools for examining the importance and uses of the dialogic form in the development of a powerful and creative feminine voice. As such, I propose to view Emily's Gondal poetry not as a series of loosely connected monologues, but as utterances in an inner dialogue between the dissenting and insistent female voice and the authoritative voice of the non-Gondal world. Emily's identification with her primary heroine, Augusta, enables her to challenge the controlling voice of the of the patriarchy that attempts to dictate and limit her creative and personal expression. The voice of Augusta in particular expresses the guilt, shame, and remorse that the woman-as-author must also experience when attempting to do battle with the patriarchy that attempts to restrict and reshape her utterances. While Anne was a part of the creation of Gondal, using it to mask her emotions through sustained dialogue with those who enabled and inspired such feelings, her …

This study applied components of Csikszentmhalyi’s flow theory to the Web-based Training (WBT) environment. Specifically considered were how the equivalence of a learner’s perceived challenges and skills for an activity can effectively predict the emergence of flow in the WBT environment. Also considered was the ability of flow dimensions — defined in flow theory — to predict and model the occurrence of flow during WBT activities. Over a period of about one hour, students (n=43) from a southwestern US university engaged in WBT learning activities pertaining to on-line coursework or self-study. A special Web-based software installed on the students’ computers sporadically reminded them to complete a series of on-line questionnaires which collected data on their flow experience, learning activities, and flow dimensions. The data collection method employed by this study is effectively an electronic, Web-enabled version of, and functionally equivalent to, the Experience Sampling Method (ESM) used in other flow studies. This study employed questionnaires used in prior flow studies to collect data regarding respondents’ flow experiences and flow dimensions, and developed an on-line instrument to collect data on students’ learning experiences based on instructional events found in computer-based lessons from Gagné. Significant findings (p<.05) from this study suggest that, …

Since there are few studies which address the relationships between racial/ethnic identity and acculturation in the African-American community, the purpose of this study was threefold: 1) explore the relationship between racial identity and African-American acculturation; 2) examine racial and ethnic identity associations; and 3) observe the connections between these cultural constructs and psychological well-being. One hundred ninety-four African-American undergraduates from a predominantly White institution and two historically Black colleges completed measures of these constructs, self-esteem, and depression. The findings indicate a relationship between racial identity and acculturation for three of the four Cross (1971) stages (encounter, immersion-emersion, and internalization). Relinquishing the White frame of reference and achieving inner security with their Blackness coincides with immersion in the eight facets comprising African-American culture. Individuals who do not identify with their race (pre-encounter) less often affiliated with their ethnic group. Conversely, achieving racial identity (internalization) was associated with ethnic identity attachment. Finally, the study's findings suggest that identity development may affect how individuals perceive themselves and feel emotionally, which may depend on identity achievement. Pre-encounter stage scores were associated with reports of higher depression and lower self-esteem; whereas, higher internalization individuals reported higher self-esteem. As for ethnic identity, those who have explored …

The focus of this investigation is to assess the relationship between false self behavior, object relations and attachment variables, and adjustment. Theory suggests that object relations and attachment are interrelated, and have been independently linked to psychological consequences. Theory also postulates a relationship between false self behavior and object relations theory. Given the interrelatedness of object relations and attachment theory it is possible that false self behavior may also be linked to attachment variables. While the relationship between object relations and false self behavior seems to have been established object relations theory and attachment theory have not been studied in tandem as related to false self behavior. In addition, this investigation will explore the relationship of adjustment variables to attachment and object relations variables. Undergraduate males and females will be solicited for participation, and will be asked to complete self-report questionnaires measuring false self behavior, object relations, attachment, and adjustment. The primary research hypothesis is that less false self behavior will be related to mature object relations, secure attachment, and fewer symptoms.

The transition to college is usually the first time many late adolescents live apart from their parents for an extended period, making it an important developmental task (Kenny, 1987) that requires a variety of adaptational resources. Bowlby's (1969/1982, 1973, 1980) attachment theory has been refined by Kenny and Rice (1995) to explain how internal working models of late adolescents are the bases of the adaptational resources that determine the quality of adjustment to college. The Kenny and Rice model may be interpreted to suggest that external resources should include relationships with parents and friends, while internal resources can include self-concept. According to the authors, "these resources are assumed to moderate or buffer the effects of developmental challenges and stressful events on adjustment" (p.437). The purpose of the present study was to extend and further clarify the ways that quality attachment relationships and positive self-concept conjointly may promote healthy adaptation in the college milieu. In particular, the present study examined the influence of self-concept as a mediating variable with respect to attachment and healthy adjustment to college. Students from Freshman Psychology classes completed measures to assess their attachment relationships with each parent, their attachment relationships with peers, their level of self-concept, …

This research explores the relationship of self-monitoring with team leader behavior and work environment preference. Those who are high on self-monitoring demonstrate flexibility in their actions with others and are socially perceptive. They perform well in a variety of leadership positions and are viewed as leaders by group members. High self-monitoring types choose "socially" based careers, including teacher and psychologist, in which they adapt their interaction styles to effectively meet the demands of clients. The demands placed on a team leader appear to require similar characteristics to those that high self-monitoring individuals possess. As a team matures through different stages of development, the role of the leader ranges from director to facilitator to consultant. In order to effectively meet team needs, a leader must be socially sensitive to interpersonal cues and have the ability to assume various roles. In addition, given the fact that the position of team leader is a highly social type of career that requires behaviors similar to careers chosen by high self-monitoring individuals, it is likely that high self-monitors would prefer working in a team work environment over a traditional one. A survey methodology was used to assess the characteristics of 100 team members. No relationship …

A descriptive analysis was given of the characteristics of the authors and citations of the articles in the journal Theological Studies from 1940-1995. Data was gathered on the institutional affiliation, geographic location, occupation, and gender and personal characteristics of the author. The citation characteristics were examined for the cited authors, date and age of the citations, format, language, place of publication, and journal titles. These characteristics were compared to the time-period before and after the Second Vatican Council in order to detect any changes that might have occurred in the characteristics after certain recommendations by the council were made to theologians. Subject dispersion of the literature was also analyzed. Lotka's Law of author productivity and Bradford's Law of title dispersion were also performed for this literature. The profile of the characteristics of the authors showed that the articles published by women and laypersons has increased since the recommendations of the council. The data had a good fit to Lotka's Law for the pre-Vatican II time period but not for the period after Vatican II. The data was a good fit to Bradford's Law for the predicted number of journals in the nucleus and Zone 2, but the observed number of …

During the early twentieth century, the Democratic party dominated the conservative political landscape of Texas. Through the 1920s, members of the Republican party focused on patronage and seemed content to maintain the position of minority party. A growing dissatisfaction with the liberal policies of the New Deal during the 1930s created opportunities for state Republicans to woo dissenting Democrats to their side. With a change of leadership within the state GOP after 1950, the Republicans waged serious campaigns for offices for the first time. Republican men exercised their political yearnings through leadership positions. Women, on the other hand, were shut out of the leadership ranks, and, as a consequence, they chose a traditional female strategy. They organized clubs in order to support the new leadership and rising candidates. Against formidable odds, Republican women acted as foot soldiers and worked diligently to attain their objectives. As early as 1920, Texas Republican women began to organize. In 1938 they joined the newly chartered National Federation of Republican Women. In 1955 Texas women organized the Texas Federation of Republican Women (TFRW). Working through the TFRW, the women became the catalysts that broke the Republican party from its state of inertia, and they significantly …

The purpose of this study was to analyze students' specific ITP-related social skills goals, student self-reported social skills, and the relationship between teacher and employer ratings of vocational students social skills and problem behaviors. This study examined (48) vocational students, (24) general education vocational students and (24) special education vocational students in grades nine through twelve. The students' vocational teachers and employers also participated in the study. This represented (144) individual assessment of social skills and problem behaviors utilizing the Social Skills Rating System -Student version (SSRS-S) and the Social Skills Rating System Teachers -version (SSRS-T). The findings indicated no specific social skill goals were deliminated in the students' ITP's. However, the findings did indicate the general education vocational students rated themselves higher, on average, on the empathy subscale than did the special education students. The analysis of data comparing standardized social skill scores, social skill subscale scores, standardized problem behavior scores, and standardized problem behavior subscale scores between teachers and employers for general and special education vocational students indicated employers rated special education students higher on the cooperation subscale only. No other differences were found.

Space-charge effects play a dominant role in many areas of physics. In high-power microwave devices using high-current, relativistic electron beams, it places a limit on the amount of radiation a device can produce. Because the beam's space-charge can actually reflect a portion of the beam, the ability to accurately predict the amount of current a device can carry is needed. This current value is known as the space-charge limited current. Because of the mathematical difficulties, this limit is typically estimated from a one-dimensional theory. This work presents a two-dimensional theory for calculating an upper-bound for the space-charge limited current of relativistic electron beams propagating in grounded coaxial drift tubes. Applicable to annular beams of arbitrary radius and thickness, the theory includes the effect introduced by a finite-length drift tube of circular cross-section. Using Green's second identity, the need to solve Poisson's equation is transferred to solving a Sturm-Liouville eigenvalue problem, which is easily solved by elementary methods. In general, the resulting eigenvalue, which is required to estimate the limiting current, must be numerically determined. However, analytic expressions can be found for frequently encountered limiting cases. Space-charge effects also produce the fundamental collective behavior found in plasmas, especially in plasma sheaths. …

By 2007, one half of higher education students are expected to enroll in distributed learning courses. Higher education institutions need to attract students searching the Internet for courses and need to provide students with enough information to select courses. Internet resource discovery tools are readily available, however, users have difficulty selecting relevant resources. In part this is due to the lack of a standard for representation of Internet resources. An emerging solution is metadata. In the educational domain, the IEEE Learning Technology Standards Committee (LTSC) has specified a Learning Object Metadata (LOM) standard. This exploratory study (a) determined criteria students think are important for selecting higher education courses, (b) discovered relationships between these criteria and students' demographic characteristics, educational status, and Internet experience, and (c) evaluated these criteria vis-à-vis the IEEE LTSC LOM standard. Web-based questionnaires (N=209) measured (a) the criteria students think are important in the selection of higher education courses and (b) three factors that might influence students' selections. Respondents were principally female (66%), employed full time (57%), and located in the U.S. (89%). The chi square goodness-of-fit test determined 40 criteria students think are important and exploratory factor analysis determined five common factors among the top 21 …

Data were examined in this study from student records in a large North Texas urban school district who were taught with two different mathematics curricula to determine whether or not they had different effects on student achievement. One of the mathematics curricula, Everyday Mathematics, was developed upon national mathematic standards, written by the National Council of Teachers of Mathematics. The other mathematics curriculum was district-approved, using a textbook from a large publisher, with a more traditional approach. The students selected for the experimental group came from six schools that had implemented the Everyday Mathematics curriculum for the 1998-99 school year. An experimental group was formed from these students. Twelve schools with similar socioeconomic ratios, ethnic makeup and 1998 Iowa Test of Basic Skills mathematic score profiles were selected. A control group was formed from this population of students that was similar to the experimental group with the exception of having been taught using the district-approved mathematics curriculum. These two groups were very similar in socioeconomic, ethnic, gender, and grade level makeup. Most importantly, the experimental group and control group were almost identical (there was no statistically significant difference) in their 1998 Iowa Test of Basic Skills mathematics scores, a gauge …

The effect of substituents on the stabilities of cumulenes-ketenes, allenes, diazomethanes and isocyanates and related systems-alkynes, nitriles and nitrile oxides is studied using the density functional theory (B3LYP, SVWN and BP86) and ab initio (HF, MP2) calculations at the 6-31G* basis set level. Using isodesmic reactions, correlation between stabilization energies of cumulenes and substituent group electronegativities (c BE) is established and the results from DFT and MP2 methods are compared with the earlier HF calculations. Calculations revealed that the density functional methods can be used to study the effect of substituents on the stabilities of cumulenes. It is observed that the cumulenes are stabilized by electropositive substituent groups from s -electron donation and p -electron withdrawal and are destabilized by electronegative substituent groups from n-p donation. The calculated geometries of the cumulenes are compared with the available experimental data.High level ab initio and density functional theory calculations have been used to study the energetics of low-barrier hydrogen bond (LBHB) systems. Using substituted formic acid-formate anion complexes as model LBHB systems, hydrogen bond strength is correlated to the pKa mismatch between the hydrogen bond donor and the hydrogen bond acceptor. LBHB model systems are characterized by the 1H-NMR chemical shift calculations. …

Thomas Jefferson: Life Lines is a five movement composition based on excerpts from Thomas Jefferson's personal letters. The material presented focuses on the intimate, human qualities of the man. The musical treatment of this material illuminates and amplifies different aspects of the inner Jefferson. The music is as diverse and varied as Jefferson's interests. The style, tone and form of the music are directly tied to Jefferson's words. Two fundamental components of Jefferson's being, the rational mind and the emotional heart, are musically portrayed in the introduction of the first movement. The music that follows in the first and all subsequent movements is derived from these two components. The first movement contains eight brief excerpts that highlight different aspects of Jefferson's mindset. Each of the remaining movements focuses on a single subject: The second movement, the death of Jefferson's wife, Martha; the third movement, Monticello; the fourth movement, a dialogue between Jefferson's head and heart; and the fifth movement, Jefferson's belief in the free mind. The music is presented by a chamber ensemble of twenty-two performers: five woodwinds (flute, oboe, two B-flat clarinets, bassoon), five brass (two french horns in F, trumpet in C, trombone, tuba), two percussionists, piano, four …

The dissertation is a collection of creative and non-fiction work, including a novel with critical introduction, four short stories, and three essays. The novel is a modern day Grail quest that takes place primarily in the Southwestern United States. The short stories are mostly set in the southwest as well, and take for their topic what Paul Fussel refers to as "hope abridged." The essays are non-fiction.

The first purpose of this study was to develop and validate the Inventory of Opinions About Persons with Disabilities (IOPD). The IOPD was developed to collect preservice early childhood educators’self-report data related to inclusion. A total of 332 participants enrolled in graduate programs in a college of education served as the validation sample. After validation and revision of the IOPD, the researcher used the instrument to investigate preservice early childhood educators’ beliefs, attitudes, and knowledge about students with disabilities and their inclusion in general education classrooms. Data were collected from 172 participants from 10 universities in Texas during their student teaching/final intern semesters. This research demonstrated that an instrument, the IOPD, could be developed to effectively measure preservice early childhood educators’ beliefs, attitudes, and knowledge about the inclusion of children with disabilities in their classrooms. The participants reported positive self-perceptions (mean = 2.0388) about their beliefs and attitudes toward inclusion. However, the participants reported less positive attitudes about training (mean = -.09884). Discriminant function analyses indicated a negligible statistical effect for type of program (professional development school or traditional) and a statistically significant effect for preferred classroom setting (non-inclusive, special education, inclusive). Further research with the same participants or similar …

This longitudinal study examined factors influencing the relationship between sustained partner violence and depression/suicidality among ethnically diverse, low income, community women. The sample at Wave 1 consisted of 303 African American, 273 Euro-American, and 260 Mexican American women in long term relationships with a household income less that twice the poverty threshold. There were no ethnic differences on frequency of partner violence, depression, or suicidality. The moderate relationship between partner violence and women's depression, confirmed previous findings. Frequency, but not recency, of violence predicted depression and suicidal ideation for African Americans and Mexican Americans, even after controlling for earlier depression or ideation. Recent violence did not predict Euro-American's depression or suicidality after controlling for initial scores. Causal and responsibility attributions for partners' violence did not mediate the relationship between violence and depression or suicidality in any ethnic group. However, African American women's attributions of global effects for violence mediated the relationship of violence on depression and suicidal ideation. Poverty level and marital status moderated the relationship between violence and the number of times women seriously considered and actually attempted suicide. Frequent violence was most lethal among the poorest women and marriage provided the least protection for women in the most …