Alexander Johnson's Ni' Concerto (1994) - Concerto no. 1 for Piano and Orchestra: a Discussion of Influences from Africa, Eastern and Western Europe

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In the new generation of artists emerging in South Africa, Alexander Johnson is considered the most prolific young composer of his day. In a recent review in the Pretoria News, Johnson has been praised by eminent critic Paul Boekkooi as a composer who has “an ear for the exotic and knows exactly how to bring it off....” He continued by noting that his music is “mentally engrossing, pleasurable to the senses and seems refreshingly free from dogmatic formulas." Johnson writes for musicians and the general public to equal satisfaction. His accessible compositions and catching use of melodic materials have made his writings very popular both in South Africa and abroad. During his residency in Belgrade in 1993-94, Johnson met Croatian pianist Dorian Leljak. Impressed with Johnson's compositional ideas and output, Leljak commissioned a work from Johnson for piano and orchestra. The result was the Niš Concerto, which Johnson completed in April 1994. The world premiere took place on June 23, 1994 with the Niš Philharmonic Orchestra conducted by Anatoli Nowiestski with Dorian Leljak as soloist. The Niš Concerto received its South African premiere in 1995 during a simultaneous celebration for “Europe Day” and the new democracy of the Republic of …
Date: August 2001
Creator: Malan, Petronel
System: The UNT Digital Library

An Analysis of Major American Riots: Issues in Riots and Riot Control

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By conducting sound research to understand the concepts surrounding rioting and efficient riot response tactics, professionals, especially whose main job is to ensure the tranquility in the society, will be better prepared to deal with all kinds of civil movements. The purpose of this study, consequently, is to meet the growing need for educational materials in this area and to provide riot response case studies, which demonstrate the numerous administrative challenges faced by law enforcement decision makers. In this study, seven major riots from throughout the United States are discussed including the Hay Market Riot of 1886, the Watts Riot of 1965, and Los Angeles Riots of 1992. Each riot case is studied in five different and independent stages: the setting and pre-disturbance situation, basic causes of the event, the disturbance situation, the response to the riot, and the aftermath of the incident. The study of all of these stages is intended to help police administrators acquire a general perspective on collective violence, and help them prevent future occurrences in their jurisdictions. In this thesis a special reference is given to the deficiencies of American riot policing and some recommendations were formed accordingly. Therefore, the study concludes with a list …
Date: August 2001
Creator: Cinoglu, Huseyin
System: The UNT Digital Library
An Analysis of the Effect of Environmental and Systems Complexity on Information Systems Failures (open access)

An Analysis of the Effect of Environmental and Systems Complexity on Information Systems Failures

Companies have invested large amounts of money on information systems development. Unfortunately, not all information systems developments are successful. Software project failure is frequent and lamentable. Surveys and statistical analysis results underscore the severity and scope of software project failure. Limited research relates software structure to information systems failures. Systematic study of failure provides insights into the causes of IS failure. More importantly, it contributes to better monitoring and control of projects and enhancing the likelihood of the success of management information systems. The underlining theories and literature that contribute to the construction of theoretical framework come from general systems theory, complexity theory, and failure studies. One hundred COBOL programs from a single company are used in the analysis. The program log clearly documents the date, time, and the reasons for changes to the programs. In this study the relationships among the variables of business requirements change, software complexity, program size and the error rate in each phase of software development life cycle are tested. Interpretations of the hypotheses testing are provided as well. The data shows that analysis error and design error occur more often than programming error. Measurement criteria need to be developed at each stage of the …
Date: August 2001
Creator: Zhang, Xiaoni
System: The UNT Digital Library

Anne Brontë's New Women: Agnes Grey and The Tenant of Wildfell Hall as Precursors of New Woman Fiction

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Anne Brontë's Agnes Grey and The Tenant of Wildfell Hall were published more than forty years before the appearance of the feminist type that the Victorians called the “New Woman;” yet, both novels contain characteristics of New Woman fiction. By considering how Brontë's novels foreshadow New Woman fiction, the reader of these novels can re-enact the “gentlest” Brontë as an influential feminist whose ideology informed the construction of the radical New Woman. Brontë, like the New Woman writers, incorporated autobiographical dilemmas into her fiction. By using her own experiences as a governess, Brontë constructs Agnes Grey's incongruent social status and a morally corrupt gentry and aristocracy through her depiction of not only Agnes's second employers, the Murrays, but also the morally debauched world that Helen enters upon her marriage to Arthur Huntingdon in The Tenant of Wildfell Hall. Moreover, Brontë incorporates her observations of Branwell's alcoholism and her own religious beliefs into The Tenant of Wildfell Hall. Although Brontë's novels contain autobiographical material, her heroines are fictional constructions that she uses to engage her readers with the woman question. Brontë accomplishes this engagement through her heroines' narrative re-enactments of fictional autobiographical dilemmas. Helen's diary and Agnes's diary-based narrative produce the …
Date: August 2001
Creator: Phillips, Jennifer K.
System: The UNT Digital Library
The Application of Hackman and Oldham's Job Characteristic Model to Perceptions Community Music School Faculty Have Towards Their Job (open access)

The Application of Hackman and Oldham's Job Characteristic Model to Perceptions Community Music School Faculty Have Towards Their Job

Hackman and Oldham's Job Characteristic Model was applied to study of perceptions community music school faculty hold towards their job. The research questions addressed core job characteristics of skill variety, task identity, task significance, autonomy, and feedback, critical psychological states (experienced meaningfulness, experienced responsibility, and knowledge of results); personal and work outcomes of satisfaction and motivation; need for professional growth. The results were compared to the national norms for nine different job families provided by Oldham, Hackman, and Stepina. Thirty-three schools, all members of the National Guild of Community Schools of the Arts, located in every geographical region of the United States, yielded 437 faculty responses (64% return rate). Of the core job characteristics, dealing with others and autonomy received the highest ratings; feedback and task significance received the lowest ratings. Of the psychological states, experienced responsibility yielded the highest rating and experienced meaningfulness yielded the lowest ratings. Of the personal/work outcomes, personal development and colleague relations received the highest ratings; pay satisfaction and overall general satisfaction received the lowest ratings. A comparison to the professional job family norms, using a one-sample ttest, found significant differences in 16 out of the 18 variables measured by the Job Characteristic Model. Strong …
Date: August 2001
Creator: Lawrence, Robert M.
System: The UNT Digital Library
The Assessment of Cognitive Development and Writing Aptitude Within Learning Communities (open access)

The Assessment of Cognitive Development and Writing Aptitude Within Learning Communities

Learning communities have emerged as an efficient and effective paradigm for improving undergraduate education, especially for entering freshmen. The academy has become increasingly interested in learning outcomes and student retention, especially as they are related to the assessment of various approaches to educating the whole student. Learning community pedagogy has developed through rigorous research. However, little is known about the impact of this pedagogy upon college students' cognitive development and writing aptitude. Cognitive development theory has been most significantly influenced by the work of William G. Perry, Jr. Though no theory exists which would address the stages of writing development in university students, many composition theorists suggest a correlation between cognitive development and writing aptitude. This study measured cognitive development and writing aptitude in learning community students and non-learning community students, matching them for SAT scores, high school grade point averages, gender, and ethnicity. The research questions of interest were: 1) How does participation in a learning community affect students' cognitive development; and 2) How does participation in a learning community affect students' writing aptitude? The participants were pre- and post-assessed for cognitive development, using the Measure of Intellectual Development (MID). Additionally, participants were preand post-assessed for writing aptitude, using …
Date: August 2001
Creator: Barnard, Miriam K.
System: The UNT Digital Library
Assessment of Psychopathy in Incarcerated Females (open access)

Assessment of Psychopathy in Incarcerated Females

Psychopaths constitute only an estimated 1% of the population, yet they are responsible for a disproportionately large number of violent and nonviolent crimes. The literature addressing this syndrome among male offenders is quite extensive. In contrast, psychopathy and its underlying factor structure remains understudied among female offenders. Research has suggested marked gender differences in the prevalence, clinical characteristics, and underlying dimensions of psychopathy. This study examined the dimensions of psychopathy in a female offender sample. The Psychopathy Checklist-Revised and the Self Report Psychopathy-II (SRP-II) were administered to 119 female inmates at Tarrant County Jail in Fort Worth, TX. Confirmatory factor analyses of the Psychopathy Checklist-Revised (PCL-R) did not support the use of the traditional two factor male model or a recently proposed two- factor female model. This thesis also addressed females' self-appraisal of PCL-R Factor 1 characteristics as well as the usefulness of the self-administered Self-Report Psychopathy-II as a screen for psychopathy.
Date: August 2001
Creator: Jackson, Rebecca L.
System: The UNT Digital Library

Barriers Limiting Access to Hospice Care for Elderly African Americans in Amarillo, Texas

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This study examines barriers limiting access to hospice care for elderly African Americans. Ethnic background plays a critical role in the development of attitudes, beliefs and expectations related to death and issues surrounding hospice care. The purpose of this study was to identify barriers that may limit access to hospice care for African Americans. A questionnaire was administered to 56 elderly African Americans in three religious settings and an African American senior citizens center. The questionnaire was designed to obtain information concerning African Americans' attitudes toward death and dying; religious beliefs; health beliefs; familiarity with hospice and prospective use of hospice. The results of the study indicate a number of barriers in access to hospice care for African Americans including: hospice knowledge barriers; education/outreach barriers; cultural knowledge barriers related to death/dying values; family/social support barriers; hospice organizational/provider barriers; health care organizational/provider barriers; and reimbursement barriers.
Date: August 2001
Creator: Anthony, Tomagene
System: The UNT Digital Library

Burnout Among Student Affairs Professionals at Metropolitan Universities

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The purpose of this study was to determine the level of burnout among student affairs professionals at the 52 U.S. member institutions of the Coalition of Urban and Metropolitan Universities. Packets containing the Maslach Burnout Inventory (MBI), the Moos Work Environment Scale (WES), and a demographic survey were mailed to 371 senior student affairs administrators at the member institutions, with a completed response rate of 58.22%. The senior student affairs administrators surveyed included the chief student affairs officers and the professional staff who reported to them. The research design employed t-tests, analyses of variance, and Pearson's Product Moment correlations. The scores obtained from the MBI and WES subscales were compared overall and along 9 independent variablestitle of position, size of institution, appointment, salary, years in current position, years in profession, age, gender, and highest degree attained. Average levels of burnout were found on each of the MBI subscores. Contrary to earlier studies, women did not suffer from statistically significant higher levels of burnout than men, and burnout levels decreased with age and years in the profession for both sexes. Lower scores on the MBI depersonalization subscale were found in employees in mid-career and in professionals from smaller schools. Emotional exhaustion …
Date: August 2001
Creator: Murphy, Lynda
System: The UNT Digital Library
Carlo Milanuzzi's Quarto Scherzo and the Climate of Venetian Popular Music in the 1620s (open access)

Carlo Milanuzzi's Quarto Scherzo and the Climate of Venetian Popular Music in the 1620s

Although music publishing in Italy was on the decline around the turn of the seventeenth century, Venice emerged as one of the most prolific publishing centers of secular song in Italy throughout the first three decades of the 1600s. Many Venetian song collections were printed with alfabeto, a chordal tablature designed to facilitate even the most untrained of musicians with the necessary tools for accompanying singers on the fashionable five-course Spanish guitar. Carlo Milanuzzi's Quarto Scherzo (1624) stands out among its contemporary Venetian song collections with alfabeto as an anthology of Venetian secular songs, including compositions by Miniscalchi, Berti, and Claudio and Francesco Monteverdi. Issues surrounding its publication, instrumentation, and musical and poetic style not only contribute to the understanding of Venetian Baroque monody, but also help to construe a repertory of vocal music with defining characteristics usually associated with popular music of the 19th, 20th, and 21st centuries.
Date: August 2001
Creator: Gavito, Cory Michael
System: The UNT Digital Library
Case studies in terrorism-drug connection: the Kurdistan Workers' Party, the Liberation Tigers of Tamil Eelam, and the Shining Path (open access)

Case studies in terrorism-drug connection: the Kurdistan Workers' Party, the Liberation Tigers of Tamil Eelam, and the Shining Path

This study scrutinizes the drug-terrorism nexus critically with intent to conceive possible remedies for the problem. The vast turnover of the global illicit drug industry constitutes the largest portion of organized crime enterprises' income. Different circles have argued that these enterprises are not the sole actors of the drug business, but terrorist groups, whose ultimate aim is a political change rather than financial strength, also profit from the “business.” The controversial nature of the problem fuelled heated debates and requires an in depth and impartial analysis, which was the main subject of the current study. At the first stage, three different cases, the PKK, the LTTE, and the SL, were studied either to prove or deny the alleged phenomenon. The sampled groups' ideology, structure, and operations helped understand the motives pushing the organizations into the ‘business.' Subsequently, several recommendations capturing vital issues both in countering terrorism and breaking terrorism-drugs link were spelled out.
Date: August 2001
Creator: Sahin, Fuat Salih
System: The UNT Digital Library

A Case Study of Leftist Terrorism in Turkey

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Change in government has characterized the development of most nations. Sometimes this change has been marked by continued evolution, in a peaceful attempt to move forward. Other times, change has been fraught with violent revolution and terrorism. This process has been the subject of much debate by political scientists and economic philosophers. Today, Turkey suffers from continued threats to its government through violent acts of terrorism conducted by various groups, expressing ideologies of leftist and rightist organizations, as well as ethnic and religious extremists. This thesis examines DHKP/C as the primary leftist revolutionary group effecting Turkey, exploring its historical background in Europe and the Middle East, as well as its philosophical link to Marxism. Further, this treatise discusses the implication of revolution and terrorism expressed by DHKP/C; and explores innovative and peaceful solutions, strategies, and techniques to be used by the police forces of Turkey in combating this group
Date: August 2001
Creator: Yayla, Ahmet
System: The UNT Digital Library
The Changing Face of Ralph Lauren's Advertising: A New Lifestyle Image and Increased Nudity (open access)

The Changing Face of Ralph Lauren's Advertising: A New Lifestyle Image and Increased Nudity

Advertising, which is an important sales tool for brands to the masses, may produce lasting impressions of a company and its products. These impressions rely on a consistent message over time to maintain a brand's image. This study examines how Ralph Lauren's advertising images have changed from a country club lifestyle image to urban/hip. In addition, the study examines the increased use of nudity and sexual imagery in Lauren's advertising. The findings were obtained by content analyzing all Ralph Lauren advertisements appearing in Gentlemen's Quarterly magazine from 1980 to 2000 (N=283). The study finds that Ralph Lauren lifestyle images have become more urban/hip, and that Lauren's advertising is utilizing more nudity, sexual interaction, and homoerotic imagery. By examining Ralph Lauren's shifting brand image via its advertising, this study contributes to a greater understanding of the connection between advertising and a company's brand image.
Date: August 2001
Creator: LaCaze, Tray
System: The UNT Digital Library
Choice for All? Charter Schools and Students with Disabilities (open access)

Choice for All? Charter Schools and Students with Disabilities

In order to assess the extent and quality of special education services in charter schools in north Texas, the researcher examined data submitted to Texa Public Education Information Management System (PEIMS), and conducted qualitative interviews with selected charter school administrators. Five cornerstones of the Individuals with Disabilities Education Act (IDEA): zero reject, individualized education program (IEP), appropriate assessment, free appropriate public education (FAPE), and least restrictive environment (LRE), were utilized in the assessment of quality. Levels of expertise in federal disability law and fiscal barriers were explored, as well.
Date: August 2001
Creator: Estes, Mary Bailey
System: The UNT Digital Library
Christian Higher Education at Dallas Theological Seminary: An Assessment of Doctor of Ministry Programs (open access)

Christian Higher Education at Dallas Theological Seminary: An Assessment of Doctor of Ministry Programs

This study involved non-experimental research to identify alumni perceptions of the strengths and weaknesses of the Doctor of Ministry degree program at Dallas Theological Seminary. An international survey was conducted to collect data from 165 Doctor of Ministry degree holders from Dallas Theological Seminary; 131 usable questionnaires were returned. A response rate of 79.4 percent was achieved. The intent of the study was to ascertain (a) the extent to which D.Min. alumni perceive that the objectives and goals of Doctor of Ministry programs at Dallas Theological Seminary are being met, (b) alumni-perceived strengths of Doctor of Ministry programs at Dallas Theological Seminary, (c) alumni-perceived weaknesses of Doctor of Ministry programs at Dallas Theological Seminary, (d) compare the findings of this case study assessment with a 1987 national study of Doctor of Ministry programs, and (e) make recommendations for the improvement of D. Min programs at Dallas Theological Seminary. The pattern that emerged from the data indicates that the D.Min. alumni believe objectives and goals of the Doctor of Ministry program at Dallas Theological Seminary are being met. In the opinion of the alumni, Doctor of Ministry programs at Dallas Theological Seminary has its strengths. The overall opinion of the D.Min. …
Date: August 2001
Creator: Bhatia, Sukhwant Singh
System: The UNT Digital Library
Communication Assistance for Law Enforcement Act of 1994: A Case Study (open access)

Communication Assistance for Law Enforcement Act of 1994: A Case Study

The purpose of this study is: to explore and analyze the Communication Assistance for Law Enforcement Act of 1994 (CALEA), to identify problems related to CALEA, to identify solutions devised by other countries to overcome problems similar to CALEA's, and to propose feasible solutions to CALEA problems.
Date: August 2001
Creator: Ozdogan, Ali
System: The UNT Digital Library
A Comparative Analysis of Traditional Versus Block and Accelerated Block Scheduled High Schools Over an Eight-Year Period in a Large Urban School District (open access)

A Comparative Analysis of Traditional Versus Block and Accelerated Block Scheduled High Schools Over an Eight-Year Period in a Large Urban School District

This study compared traditional, A/B and accelerated block scheduling and its effects on student achievement and attendance by comparing the differences in student outcomes observed before and after the adoption of block/accelerated block schedules. The independent variable was the use of time in a block-scheduling model. The dependent variables were student outcomes measured by nine indicators based on the Academic Excellence Indicator System in Texas: student attendance, graduation rate, dropout rate, percentage of students taking advanced courses, percentage of students passing all Exit-level Texas Assessment of Academic Skills tests, percentage of students taking College Admissions Tests, mean SAT total score of those students who took the SAT, mean ACT total score of those students who took the ACT, and percentage of students who are at or above criterion on the SAT or ACT of those students taking the SAT or ACT. Data from archival files from the Texas Education Agency's Academic Excellence Indicator System for each respective year of the eight-year longitudinal study was collected. Scheduling models (traditional, alternating block and accelerated block) were investigated. The sample was drawn from the student population of a large urban school district in north central Texas, a district serving approximately 77,000 students. The …
Date: August 2001
Creator: McCumber, Patricia Morrison
System: The UNT Digital Library

A Comparison of Five Robust Regression Methods with Ordinary Least Squares: Relative Efficiency, Bias and Test of the Null Hypothesis

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A Monte Carlo simulation was used to generate data for a comparison of five robust regression estimation methods with ordinary least squares (OLS) under 36 different outlier data configurations. Two of the robust estimators, Least Absolute Value (LAV) estimation and MM estimation, are commercially available. Three authormodified variations on MM were also included (MM1, MM2, and MM3). Design parameters that were varied include sample size (n=60 and n=180), number of independent predictor variables (2, 3 and 6), outlier density (0%, 5% and 15%) and outlier location (2x,2y s, 8x8y s, 4x,8y s and 8x,4y s). Criteria on which the regression methods were measured are relative efficiency, bias and a test of the null hypothesis. Results indicated that MM2 was the best performing robust estimator on relative efficiency. The best performing estimator on bias was MM1. The best performing regression method on the test of the null hypothesis was MM2. Overall, the MM-type robust regression methods outperformed OLS and LAV on relative efficiency, bias, and the test of the null hypothesis.
Date: August 2001
Creator: Anderson, Cynthia, 1962-
System: The UNT Digital Library

Comparison of GPS Point Selection Methods for GIS Area Measurement of Small Jurisdictional Wetlands

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U.S. Army Corps of Engineers (USACE) regulates fill of jurisdictional waters of the United States including wetlands. Recent USACE regulations set a threshold of impacts to wetlands at one-half acre. Impact area can be determined by Global Positioning System (GPS) measurement of wetland boundary and Geographic Information System (GIS) calculation of impact area. GPS point selection methods include (1) equal time interval, (2) transect and (3) intuition. Four two-acre shapes were measured with each GPS method and brought into GIS for area calculation. Analysis of variance and Root Mean Square Error analyses determine that the transect method is an inferior point selection method in terms of accuracy and efficiency.
Date: August 2001
Creator: Shelton, Michael
System: The UNT Digital Library

Condom Use Among College Students

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With the spread of the Human Immuno-Deficiency Virus and sexually transmitted diseases, it is extremely important for sexually active individuals to protect themselves properly if they decide to engage in sexual intercourse. Knowledge of HIV and the Acquired Immune Deficiency Syndrome has been associated with safer sexual practices, but knowledge alone does not totally explain risky sexual practices. This study examined how 154 college students' knowledge of HIV/AIDS, relationship status, perceptions of condom use, and perceptions of personal risk affect condom use during sexual intercourse. The impact of trust and love justifications along with the approval of peers were also examined. Perceptions of condom use and perceptions of personal risk were compared by gender and ethnicity; how perception of personal risk is related to condom use and condom use intentions was also examined. Condom use intention was found to be a significant predictor of condom use, and a significant difference of means for condom use intentions was reported between individuals who used condoms during their last experience with sexual intercourse and those who did not use condoms during their last sexual experience
Date: August 2001
Creator: Bradshaw, Joe W.
System: The UNT Digital Library
Coping Styles, Quality of Life, and Sexual Trauma in Women Veterans (open access)

Coping Styles, Quality of Life, and Sexual Trauma in Women Veterans

The purpose of the following study was to evaluate sexual trauma and the effects on women veteran's quality of life ratings and current and past coping strategies. Participants were screened for sexual trauma history and divided into five mutually exclusive categories: 1)childhood sexual trauma, 2)civilian adult sexual trauma, 3)military sexual trauma, 4)multiple sexual trauma, and 5)no sexual trauma. Results of the study were mixed, retaining some hypotheses and rejecting others. Results regarding differences in QOL for the sexual trauma groups were rejected, as none of the QOL analyses were significant. Issues of small effect size for the QOL measure and low power to detect differences are discussed as limitations in the current study. Several significant findings were detected in the coping analyses. As predicted, the no trauma group was found to use significantly more approach coping strategies than the sexual trauma group for the past problem. Additionally, the sexual trauma group used significantly more avoidant coping techniques for past problem than the no trauma group. No between group differences were detected for sexual trauma type, however, several significant differences emerged in the comparisons of the multiple sexual trauma and military sexual trauma group's past coping compared to the no sexual …
Date: August 2001
Creator: Zak, Elizabeth N.
System: The UNT Digital Library
The Correctional Orientation of Juvenile Facility Directors (open access)

The Correctional Orientation of Juvenile Facility Directors

Over the last 30 years, the juvenile justice system and juvenile correctional ideology shifted to become more punitive in nature. However, studies examining this shift are lacking in the literature. The present study will attempt to assess what correctional ideology, rehabilitative or punitive, is dominant within juvenile corrections by conducting a national survey to juvenile facility directors. This study will be based on prior literature, most of which has focused upon line staff in an adult correctional setting. From this prior literature, more specifically from the work of Cullen et al. (1989), scales will be created to determine the correctional orientation of the key administrators in juvenile facilities. This will allow us to assess whether the correctional ideology driving the juvenile system has in fact become punitive. The findings from this study have the opportunity to alter the current status quo in juvenile corrections.
Date: August 2001
Creator: Sifuentes-Hammer, Amy
System: The UNT Digital Library
Criminal Justice Responses to Emerging Computer Crime Problems (open access)

Criminal Justice Responses to Emerging Computer Crime Problems

This study discussed the issue of computer crime as it relates to the criminal justice system, specifically law enforcement. The information was gathered through several books, academic journals, governmental documents, and the Internet. First, the nature and forms of computer crime, Internet crime, and cyber terrorism were analyzed. Next, law enforcement responses were discussed. International aspects of the problem were separately pointed out. Further, detection and investigation of computer crime were examined. Problems related to the each component of the criminal justice system (law enforcement, investigators, prosecutors, and judges) were described. Specific solutions to these problems were offered. In addition, computer crime handling procedures were presented. Results indicate that computer crime will increase in the 21st century, and this problem cannot be controlled by traditional methods alone. Using new technology as preventive measures, and increasing awareness and security conscious culture will prevent the problem in the long run.
Date: August 2001
Creator: Sen, Osman N.
System: The UNT Digital Library

The Developmental Physiology of the Zebrafish: Influence of Environment and Cardiovascular Attributes

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Temperature effects on the development of the zebrafish embryos and larvae and adults were examined. It was found that the earlier in development a temperature change was performed on an embryo, the more significant the change in survival and/or subsequent development. Thus, viable temperature ranges for zebrafish widened significantly as development proceeded. Adults reared and bred at 25oC produced embryos that were significantly more successful at the lower range of rearing temperatures compared to embryos produced from adults reared at 28oC. The majority of this study focused on the physiological effects of swim training during development in the zebrafish. The earlier in development the zebrafish larvae were trained, the greater the mortality. Trained free swimming larvae had a significantly higher routine oxygen consumption after 11 days of training, and a higher mass specific routine metabolic rate after 8 and 11 days of training. Trained free swimming larvae consumed significantly less oxygen during swimming and were more efficient at locomotion, compared to control larvae. Training enhanced survival during exposure to extreme hypoxia in all age groups. Performance aspects of training were investigated in attempt to quantify training effects and in most cases, trained fish performed significantly better than controls. As blood …
Date: August 2001
Creator: Bagatto, Brian
System: The UNT Digital Library