The goal of this thesis is to find provably correct methods for detecting conflicts between XACML rules. A conflict occurs when one rule permits a request and another denies that same request. As XACML deals with access control, we can help prevent unwanted access by verifying that it contains rules that do not have unintended conflicts. In order to help with this, we propose an algorithm to find these conflicts then use the Coq Proof Assistant to prove correctness of this algorithm. The algorithm takes a rule set specified in XACML and returns a list of pairs of indices denoting which rules conflict. It is then up to the policy writer to see if the conflicts are intended, or if they need modifying. Since we will prove that this algorithm is sound and complete, we can be assured that the list we obtain is complete and only contains true conflicts.

This qualitative research study examined teachers and teacher assistants perceptions of their working relationships. Three teachers and three teacher assistants reflected specifically on their work experiences and interactions with their job partners in their respective schools, as they worked to provide supports to students with a variety of behavioral, academic and medical needs. Two main questions guided this research: How did each participant describe their working relationship with his/her job partner? What factors were perceived as influential on a positive and effective working relationship? <p>Thematic analysis of the qualitative interview data from the participants informed the generation of dominant themes. The role of administration, professional interaction, and personal attributes emerged as main factors influencing the teacher and teacher assistant relationship. The researcher provides a model for conceptualizing this relationship and suggests that professionalism is required of both parties in the relationship. The model of professionalism is supported by three main behaviors exhibited by people in the relationship: competence, collegiality, and clarity of role.

This qualitative research study examined teachers and teacher assistants perceptions of their working relationships. Three teachers and three teacher assistants reflected specifically on their work experiences and interactions with their job partners in their respective schools, as they worked to provide supports to students with a variety of behavioral, academic and medical needs. Two main questions guided this research: How did each participant describe their working relationship with his/her job partner? What factors were perceived as influential on a positive and effective working relationship? <p>Thematic analysis of the qualitative interview data from the participants informed the generation of dominant themes. The role of administration, professional interaction, and personal attributes emerged as main factors influencing the teacher and teacher assistant relationship. The researcher provides a model for conceptualizing this relationship and suggests that professionalism is required of both parties in the relationship. The model of professionalism is supported by three main behaviors exhibited by people in the relationship: competence, collegiality, and clarity of role.

The goal of this thesis is to find provably correct methods for detecting conflicts between XACML rules. A conflict occurs when one rule permits a request and another denies that same request. As XACML deals with access control, we can help prevent unwanted access by verifying that it contains rules that do not have unintended conflicts. In order to help with this, we propose an algorithm to find these conflicts then use the Coq Proof Assistant to prove correctness of this algorithm. The algorithm takes a rule set specified in XACML and returns a list of pairs of indices denoting which rules conflict. It is then up to the policy writer to see if the conflicts are intended, or if they need modifying. Since we will prove that this algorithm is sound and complete, we can be assured that the list we obtain is complete and only contains true conflicts.

The sport industry is a popular and competitive career field with employees drawn to work in a dynamic, yet often untraditional work environment. The challenge of achieving work-life balance has received considerable study in sport, as employees often find a conflict in balancing their job and other life responsibilities, such as family (work-family conflict) and outside activities. This study introduces a new area of potential conflict (work-extracurricular conflict), the outside activities that may be neglected due to a job, which may impact employees. This area may be especially pertinent to a younger segment of the industry which has not been studied, graduate assistants who work in athletic departments while continuing their education. The purpose of this exploratory study was to assess work-life balance in graduate assistants (GAs) and their supervisors by comparing their levels of work-family conflict, work-extracurricular conflict, job satisfaction, and life satisfaction. Secondly, the study introduced the work-extracurricular conflict construct. Data were collected from GAs and supervisors (N = 47) working in five Division I university athletic departments. Descriptive statistics and ANOVA revealed significant differences between GAs’ and supervisors’ job satisfaction, while determining they did not differ on work-family conflict, work-extracurricular conflict and life satisfaction levels. They reported moderate levels of family and extracurricular conflict. Sport managers can utilize this information to better understand the work-life balance of GAs and establish dialogue on ways to improve GAs experience in hopes of keeping these sport professionals in the industry long-term.

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There are kinds of English teaching materials for preschool children in the market, including English alphabets teaching materials, word cards and picture cards. It makes no exceptions that the key learning method of these materials needs either parents or teachers¡¦ accompanies in order to teach Children to recognize alphabets and to pronounce tones, helping Children to learn alphabets. The research aims to assist Children to study English alphabets more effectively. The research methods consist of the following: to study through related documents in order to comprehend specialists¡¦ advises about children studies; to observe how the specialists using teaching methods to tutor children study alphabets; to realize users¡¦ requirements through interviews. Combining the three methods above, the researcher decides to use LEGO MINDSTORMS NXT robots and accessories as teaching tools which are low cost, similar to LEGO cubes in appearance, and with easy replace accessories. Associate with PC to transmit information, the researcher designs an assisting studying system that can help children to recognize and study alphabets and tones without parents or teacher¡¦s accompanying. The research intends to provide the follow-through children assisted study system developers as a reference through this research and develop methods, in order to speed the time of development.

This study examined the intentions of educational leadership students in Florida university graduate programs in regards to demographics and self-assessed leadership characteristics. The study employed a non-experimental design wherein Regression, ANOVA, and Multiple Regression statistical techniques were employed to explore intent. It examined the influences that self-assessed leadership behavior, gender, number of credits completed, and age had on respondent intentions as measured by the Leadership Practice Inventory and the Demographics and Intentions Questionnaire. The highest assessed priori sample size was 159 when power was set at 0.80, alpha was 0.05, and the expected effect size was set at .10. This study is important because it identified additional reasons administrative pools have perceived shortages of quality candidates using job choice theory as a frame of reference and identified. Results were made available in order to offer the Florida Department of Education, school district leadership academies, and university educational leadership departments valuable insight for reform of selection, recruitment, and retention.

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The purpose of this study was to examine the role of high school assistant principals in Indiana. In this descriptive study, the researcher examined (a) the job responsibilities and duties of the high school assistant principal, (b) the degree of involvement in the job responsibilities and duties of the high school assistant principal, (c) the degree of job satisfaction for areas of administrative responsibilities, and (d) the areas of responsibility that high school assistant principals were provided the most and least training to prepare them for the principalship.The study was limited to the population of high school assistant principals in Indiana public schools. Out of 492 high school assistant principals, 271 responded to a paper or on-line version of the survey instrument used in this study. The survey instrument included 141 forced responses divided into four sections: Duties and Responsibilities, Job Satisfaction, Preparation, and Demographics.Of the six administrative areas in this study, high school assistant principals reported having a greater level of responsibility for duties in the area of school management and the lowest level of responsibility in the area of community relations. In terms of job satisfaction, assistant principals reported being most satisfied with the performance of duties related to student activities and least satisfied with duties related to curriculum and instruction. Assistant principals reported being the most prepared to perform duties related to student activities and least prepared for those duties related to curriculum and instruction. The demographics gathered from the study revealed that most high school assistant principals in Indiana were male, white, married, served over five years in this position and in the next three to five years plan to remain in their current position.Conclusions and recommendations of this study focused on developing a consistent definition of the role of the assistant principal in Indiana. In addition, if assistant principals are content in making this a career-oriented position, then state officials, universities, and school districts, must collaborate to provide a system of training and development of well-rounded knowledgeable leaders for the future of our high schools in Indiana. / Department of Educational Leadership