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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Um método de refatoração para modularização de interesses transversais / A refactoring method for crosscutting concerns modularisation

Silva, Bruno Carreiro da January 2009 (has links)
Sistemas de software bem modularizados podem trazer diversos benefícios como reu- sabilidade, compreensão, adaptabilidade, manutenibilidade, entre outros. O conceito de separação de interesses está diretamente ligado à ideia de modularização e consiste na capacidade de manter cada interesse em sua própria unidade modular. Um interesse pode estar relacionado tanto a requisitos funcionais como não-funcionais e em diferentes níveis de abstração. Algumas das técnicas que têm sido utilizadas para modularização de interes- ses são a Programação Orientada a Aspectos (POA) e Refatoração. Entretanto, a maioria das propostas de refatoração que envolvem a POA possui limitações para a modularização de interesses transversais: muitas delas são de granularidade fina; algumas são definidas imprecisamente e possuem sobreposição de intenções. A seleção e composição de tais refatorações para a modularização de interesses é uma tarefa difícil e não-trivial, além de variar em cada contexto específico, o que dificulta o reuso. Algumas das propostas de refatorações são voltadas especialmente para interesses transversais, no entanto possuem um nível de abstração pouco elevado e encontram-se acopladas a mecanismos específicos de linguagens de programação OO e OA. Adicionalmente, a aplicação de refatorações deve ser planejada e acompanhada sistematicamente durante o desenvolvimento e manu- tenção de um software, pois envolve alocação de recursos e avaliação de custo/benefício. O objetivo deste trabalho é apresentar um método de refatoração para modularização de interesses transversais, através de refatorações de granularidade alta, baseado em padrões recorrentes de estruturas transversais (chamados de sintomas). Além disso, como parte do método, propõem-se algoritmos para análise de impacto a fim de apoiar desenvolve- dores no processo decisório de aplicação de refatorações candidatas. Inicialmente, dois estudos bibliográficos foram conduzidos: o primeiro sobre propostas de refatorações que envolvem aspectos e o segundo sobre trabalhos de medição de interesses. Dois estudos de caso foram realizados totalizando 22 interesses de dois sistemas alvos. Este trabalho de avaliação possibilitou uma análise quantitativa e qualitativa dos resultados onde foi possível verificar a aplicabilidade do proposta. / Well-modularized software systems can bring several benefits such as reuse, com- prehension, adaptability, maintainability, among others. The concept of separation of concerns refers to the idea of modularisation, which consists on the ability to keep every concern in its own modular unit. A concern can refer to functional and non-functional requirements and can also be in different abstraction levels. Some of the techniques which have been applied for crosscutting concerns modularization are Aspect-Oriented Programming (AOP) and Refactoring. However, most of the aspect-oriented refactor- ings have limitations regarding the modularisation of crosscutting concerns. A number of them presents fine-grained transformations. While some of them are well-documented catalogues, a number of them are defined imprecisely, addressing the same situation and having overlapping intentions. They do not allow the designer to holistically reason about the elements involved in a crosscutting concern. It becomes difficult and non-trivial to choose a set of fine-grained refactorings and organize them in a feasible order to achieve the concern modularisation in a specific context. Some of the refactoring techniques are particularly focused on crosscutting concerns, however they are not placed in a suf- ficient abstraction level. Moreover they are coupled to specific OO and AO language mechanisms. Additionally, the application of refactorings should be planned and realized systematically during software development and maintenance since it involves resource allocation and tradeoff analysis. The goal of this work is to present a refactoring method for crosscutting concerns modularisation, through coarse-grained refactorings based on recurring patterns of crosscutting shapes (called symptoms). Also, as part of the method, algorithms for change-impact analysis are proposed in order to support developers during the decision process of the application of refactoring candidates. Initially, two biblio- graphic studies were made: the first one about refactoring approaches which involve as- pects, and the second one about concern measurement techniques. Two case studies were carried out totalizing 22 concerns of two target systems. This evaluation work allowed a quantitative and qualitative analysis of the results. Thus it was possible to verify the applicability of our approach.
112

Leadership Matters: Supporting Administrators Through First Year Implementation of a Standards-Based Evaluation System in a Small Urban School District

January 2014 (has links)
abstract: ABSTRACT Education policymakers at the national level have initiated reforms in K-12 education for that past several years that have focused on teacher quality and teacher evaluation. More recently, reforms have included legislation that focuses on administrator quality as well. Included in far-reaching recent legislation in Arizona is a requirement that administrators be evaluated on a standards-based evaluation system that is linked to student outcomes. The end result is an annual summative measure of administrator effectiveness that impacts job retention. Because of this, Arizona administrators have become concerned about rapidly becoming proficient in the new evaluation systems. Administrators rarely have the explicit professional development opportunities they need to collaborate on a shared understanding of these new evaluation systems. This action research study focused on a group of eight administrators in a small urban district grappling with a new, complex, and high-stakes administrator evaluation that is a component of an all-encompassing Teacher Incentive Fund Grant. An existing professional learning time was engaged to assist administrators in lessening their concerns and increasing their understanding and use of the evaluation instrument. Activities were designed to engage the administrators in dynamic, contextualized learning. Participants interacted in a group to interpret the meaning of the evaluation instrument share practical knowledge and support each other's acquisition understanding. Data were gathered with mixed methods. Administrators were given pre-and post-surveys prior to and immediately after this six-week innovation. Formal and informal interviews were conduct throughout the innovation. Additionally, detailed records in the form of meeting records and a researcher journal were kept. Qualitative and quantitative data were triangulated to validate findings. Results identified concerns and understanding of administrators as they attempted to come to a shared understanding of the new evaluation instrument. As a result of learning together, their concerns about the use of the instrument lessened. Other concerns however, remained or increased. Administrators found the process of the Administrator Learning Community valuable and felt their understanding and use of the instrument had increased. Intense concerns about the competing priorities and initiatives led to the administrators to consider a reevaluation of the competing initiatives. Implications from this study can be used to help other administrators and professional development facilitators grappling with common concerns. / Dissertation/Thesis / Ed.D. Leadership and Innovation 2014
113

Um método de refatoração para modularização de interesses transversais / A refactoring method for crosscutting concerns modularisation

Silva, Bruno Carreiro da January 2009 (has links)
Sistemas de software bem modularizados podem trazer diversos benefícios como reu- sabilidade, compreensão, adaptabilidade, manutenibilidade, entre outros. O conceito de separação de interesses está diretamente ligado à ideia de modularização e consiste na capacidade de manter cada interesse em sua própria unidade modular. Um interesse pode estar relacionado tanto a requisitos funcionais como não-funcionais e em diferentes níveis de abstração. Algumas das técnicas que têm sido utilizadas para modularização de interes- ses são a Programação Orientada a Aspectos (POA) e Refatoração. Entretanto, a maioria das propostas de refatoração que envolvem a POA possui limitações para a modularização de interesses transversais: muitas delas são de granularidade fina; algumas são definidas imprecisamente e possuem sobreposição de intenções. A seleção e composição de tais refatorações para a modularização de interesses é uma tarefa difícil e não-trivial, além de variar em cada contexto específico, o que dificulta o reuso. Algumas das propostas de refatorações são voltadas especialmente para interesses transversais, no entanto possuem um nível de abstração pouco elevado e encontram-se acopladas a mecanismos específicos de linguagens de programação OO e OA. Adicionalmente, a aplicação de refatorações deve ser planejada e acompanhada sistematicamente durante o desenvolvimento e manu- tenção de um software, pois envolve alocação de recursos e avaliação de custo/benefício. O objetivo deste trabalho é apresentar um método de refatoração para modularização de interesses transversais, através de refatorações de granularidade alta, baseado em padrões recorrentes de estruturas transversais (chamados de sintomas). Além disso, como parte do método, propõem-se algoritmos para análise de impacto a fim de apoiar desenvolve- dores no processo decisório de aplicação de refatorações candidatas. Inicialmente, dois estudos bibliográficos foram conduzidos: o primeiro sobre propostas de refatorações que envolvem aspectos e o segundo sobre trabalhos de medição de interesses. Dois estudos de caso foram realizados totalizando 22 interesses de dois sistemas alvos. Este trabalho de avaliação possibilitou uma análise quantitativa e qualitativa dos resultados onde foi possível verificar a aplicabilidade do proposta. / Well-modularized software systems can bring several benefits such as reuse, com- prehension, adaptability, maintainability, among others. The concept of separation of concerns refers to the idea of modularisation, which consists on the ability to keep every concern in its own modular unit. A concern can refer to functional and non-functional requirements and can also be in different abstraction levels. Some of the techniques which have been applied for crosscutting concerns modularization are Aspect-Oriented Programming (AOP) and Refactoring. However, most of the aspect-oriented refactor- ings have limitations regarding the modularisation of crosscutting concerns. A number of them presents fine-grained transformations. While some of them are well-documented catalogues, a number of them are defined imprecisely, addressing the same situation and having overlapping intentions. They do not allow the designer to holistically reason about the elements involved in a crosscutting concern. It becomes difficult and non-trivial to choose a set of fine-grained refactorings and organize them in a feasible order to achieve the concern modularisation in a specific context. Some of the refactoring techniques are particularly focused on crosscutting concerns, however they are not placed in a suf- ficient abstraction level. Moreover they are coupled to specific OO and AO language mechanisms. Additionally, the application of refactorings should be planned and realized systematically during software development and maintenance since it involves resource allocation and tradeoff analysis. The goal of this work is to present a refactoring method for crosscutting concerns modularisation, through coarse-grained refactorings based on recurring patterns of crosscutting shapes (called symptoms). Also, as part of the method, algorithms for change-impact analysis are proposed in order to support developers during the decision process of the application of refactoring candidates. Initially, two biblio- graphic studies were made: the first one about refactoring approaches which involve as- pects, and the second one about concern measurement techniques. Two case studies were carried out totalizing 22 concerns of two target systems. This evaluation work allowed a quantitative and qualitative analysis of the results. Thus it was possible to verify the applicability of our approach.
114

Propriedades métricas do inventário de preocupações de carreira de adulto-versão para atletas : validade de construto e consistência interna

Ferreira, Alexandre Ortiz January 2009 (has links)
O objeto deste estudo é a verificação das propriedades métricas (validade de construto e consistência interna) do "Inventário de Preocupações de Carreira de Adulto - versão para Atletas" (IPCAAt 0 - 61) (Balbinotti e Balbinotti, 2008). Trata-se de um inventário de 61 itens (15 itens por dimensão, sendo 5 para cada subdimensão mais um item que avalia os projetos de uma provável mudança de carreira). O inventário analisa quatro dos cinco estados de desenvolvimento de carreira (a primeira foi excluída em razão da idade) conforme a teoria de Super (1957). Estes 4 estados e seus subestados se apresentam, em ordem, como segue: exploração (cristalização, especificação e realização); estabelecimento (estabilização, consolidação e avanço profissional); manutenção (manter posição, atualizar-se e inovar); e desengajamento (desaceleração, planificação da aposentadoria e vida de aposentado). Participaram desta pesquisa 336 atletas, brasileiros, de ambos os sexos (masculino, 255; feminino, 81) com idades variando de 16 a 56 anos, de 16 modalidades esportivas. Cuidados éticos foram tomados de forma que se obteve o consentimento de todos os sujeitos participantes da pesquisa. Primeiramente, foram analisadas as estatísticas de consistência interna do instrumento, de cada dimensão e subdimensão das preocupações de carreira. Os índices de média e de correlações item-item e item-dimensão (e subdimensão) apresentaram-se satisfatórios. O resultado do alpha de Cronbach apresentou índices considerados desejáveis (superiores a 0,80), o menor índice observado entre as dimensões foi de 0,90 e nas subdimensões foi de 0,84. Ao analisar o modelo fatorial exploratório, os valores indicaram que todas as correlações parciais estavam adequadas para proceder à análise fatorial exploratória, de tal modo, os resultados confirmaram a unidimensionalidade de cada dimensão. Posteriormente, com a intenção de verificar se as quatro dimensões são realmente compostas por três subdimensões cada, testou-se a validade confirmatória através dos indicadores Quiquadrado, razão entre Qui-quadrado e graus de liberdade, GFI, AGFI e RMS (que foram estimados para a amostra geral e para sexo). Os resultados indicaram estar de acordo com os critérios padrão para a amostra geral e sexo masculino e parcialmente aceitável para o sexo feminino. Assim, o IPCAAt-61 apresentou, fortemente, precisão em suas medidas e que se trata de dimensões consistentes e que avaliou de forma fidedigna aquilo que elas propõem avaliar. Ainda foram exploradas estatísticas descritivas de tendência central, de dispersão e de distribuição da amostra. Finalmente, comparações de médias, com o propósito de verificar a necessidade de criação de tabelas normativas de acordo com os subgrupos de sexo e idade, foram conduzidas. Os resultados obtidos indicaram ser necessário à criação de tabelas normativas diferentes para os subgrupos da amostra, o que efetivamente se fez. / The object of this study is the verification of metric properties (construct validity and internal consistency of) the "Adult Career Concerns Inventory - version for Athletes" (IPCAAt - 61) (Balbinotti and Balbinotti, 2008). This is a list of 61 items (15 items by dimension, and 5 for each subdimension one more item that assesses the projects of a probable change of career). The survey examines four of the five states of career development (the first was ruled out on grounds of age) as the theory of Super (1957). These 4 states and their states sub are presented in order, as follows: holding (crystallization, specification and implementation), establishment (stabilization, consolidation and professional advancement), maintenance (maintaining position, update it and innovate), and disengagement (deceleration, planning for retirement and retired life). 336 athletes participated in this research, Brazilian, both sexes (male, 255, female, 81) with ages ranging from 16 to 56 years, from 16 sports. Ethics of care was taken so that the consent is obtained from all subjects participating in the research. First, the statistics were examined for internal consistency of the instrument, each dimension and subdimension the concerns of their career. The indices of average correlations and item-item and item-scale (and subscale) were satisfactory. Thus, the results of Cronbach's alpha showed indices considered desirable (above 0.80), the lower rate was observed between the dimensions of 0.90 and subdimensions was 0.84. The figures indicated that all the partial correlations were adequate for the exploratory factor analysis, so the results confirmed the unit dimension in each dimension. Later, with the intention to verify whether the four dimensions are actually composed of three subdimension each, it was tested the validity through confirmatory indicators chi-square, ratio of chi-square and degrees of freedom, GFI, AGFI, and RMS (which were estimated for the overall sample and for sex). The results indicated that in accordance with standard criteria for the overall sample and males and partially acceptable for females. Thus, one can assume the validity of the inventory, since the construct validity was established for the total sample and by gender. The IPCAAt-61 shows, strongly, precisely in its measures and dimensions that it is consistent and reliable way of assessing what they offer value. Descriptive statistics were also used for central tendency, dispersion and distribution of the sample. Finally, comparisons of means in order to verify the need for setting up tables in accordance with the normative subgroups of sex and age were conducted.
115

Predicting Friendship Levels in Online Social Networks

Ahmad, Waqar, Riaz, Asim January 2010 (has links)
Abstract Context: Online social networks such as Facebook, Twitter, and MySpace have become the preferred interaction, entertainment and socializing facility on the Internet. However, these social network services also bring privacy issues in more limelight than ever. Several privacy leakage problems are highlighted in the literature with a variety of suggested countermeasures. Most of these measures further add complexity and management overhead for the user. One ignored aspect with the architecture of online social networks is that they do not offer any mechanism to calculate the strength of relationship between individuals. This information is quite useful to identify possible privacy threats. Objectives: In this study, we identify users’ privacy concerns and their satisfaction regarding privacy control measures provided by online social networks. Furthermore, this study explores data mining techniques to predict the levels/intensity of friendship in online social networks. This study also proposes a technique to utilize predicted friendship levels for privacy preservation in a semi-automatic privacy framework. Methods: An online survey is conducted to analyze Facebook users’ concerns as well as their interaction behavior with their good friends. On the basis of survey results, an experiment is performed to justify practical demonstration of data mining phases. Results: We found that users are concerned to save their private data. As a precautionary measure, they restrain to show their private information on Facebook due to privacy leakage fears. Additionally, individuals also perform some actions which they also feel as privacy vulnerability. This study further identifies that the importance of interaction type varies while communication. This research also discovered, “mutual friends” and “profile visits”, the two non-interaction based estimation metrics. Finally, this study also found an excellent performance of J48 and Naïve Bayes algorithms to classify friendship levels. Conclusions: The users are not satisfied with the privacy measures provided by the online social networks. We establish that the online social networks should offer a privacy mechanism which does not require a lot of privacy control effort from the users. This study also concludes that factors such as current status, interaction type need to be considered with the interaction count method in order to improve its performance. Furthermore, data mining classification algorithms are tailor-made for the prediction of friendship levels.
116

Voices of Sri Lanka's Youth : Aspirations and Perceptions of Freedom and Possibilities

Lundell, Andreas January 2008 (has links)
During November and December 2007 a Minor Field Study was conducted in the southwest of Sri Lanka with the aim of exploring the aspirations and perceptions of freedom and possibilities among a sample of Sri Lankan youth and also how their situation is viewed upon by people in their close surroundings. The aim was also try to discern the main concerns and indicators of unfreedom that in the eye of the informants are viewed as obstacles to development, to personal human development as well as to the development of Sri Lanka as a nation. The theoretical framework that was used as inspirational ground and basis for the formulation of the project, was Amartya Sen’s concept of “development as freedom” and his “capability approach” which focuses on the human potential and what freedom an individual enjoys to convert capabilities into desired functionings or the realization of aspirations. This modern economic theory was tested in this context to find out if it is applicable and relevant in ethnographic development studies. Despite its lack of numerical metrics, the “capability approach” seems very relevant to describe the reality of at least the Lankese youth in this study. As methodology for the qualitative field work, Hadley Cantril’s “aspiration-model” and his “self-anchoring striving scale” was used which provides a simple, easily applicable interview technique for exploring the unique reality of an individual and what it shares or don’t shares with that of others. The results show that there are many strong aspirations among the Sri Lankan youth; aspirations of being a good person that achieve something in life, aspirations of being able to take the best care of the family, to go through a qualitative education and to get a good job with a good salary. Many youth want to go abroad. Of course there are aspirations of peace in the war-torn country. There are concerns and feelings of unfreedom that relate to the unemployment situation, a very difficult economic situation in the country, underdevelopment and inadequate facilities, the ongoing war, and political unfreedom.
117

Pygmalion in the courtroom: the impact of court-level racial threat on criminal justice decision making

Linnemann, Travis Wade January 1900 (has links)
Master of Arts / Department of Sociology, Anthropology, and Social Work / L. Susan Williams / Building upon macrostructural “social threat” (Blalock, 1967) research, the current study develops a theoretical model of judicial decision-making processes that focuses upon racial threats perceived within individual court contexts and the corresponding effects on individual sentencing outcomes. This model recognizes that in the absence of a true-measure of a defendant’s threat to the community (likelihood to re-offend) judicial decision makers often rely upon stereotypical generalizations regarding offender populations to render decisions. Although actors develop biases and stereotypes through interactions with society in general, the most relevant knowledge affecting sentencing decisions is perceptions gained through the course of work. Similar to the influential “Pygmalion in the Classroom” study, biases and stereotypes regarding the criminality of groups of criminal defendants are pervasive in contemporary society, undoubtedly influencing sentencing outcomes. Therefore, the most meaningful measurement of threat, as it pertains to sentencing, is the contextual composition of court caseloads. Using data from the Bureau of Justice Statistics-State Court Processing Statistics (SCPS) program, this study examines court-contextual or caseload level threats and the interaction between courtroom context and individual offense/offender characteristics and the corresponding impact on sentencing outcomes. Findings demonstrate that courts of high minority defendant volume apply more punitive sanctions to (increased sentence length and odds of incarceration) to all defendants within this context, while black defendants receive the greatest sanctions. These findings support assertions regarding the impact of threatening populations within courtroom contexts.
118

A Psychometric Evaluation of a Measure for Evaluating Youth’s and their Parent’s Worries about Psychosocial Treatment

Selles, Robert Rein 07 June 2016 (has links)
INTRODUCTION: Initial examination of treatment worries suggest they may represent an important construct; however, previously used measures were limited by their specificity, scale format, and lack of parent report. Therefore the present study sought to examine the initial outcomes and psychometrics of newly developed corresponding measures of treatment worries in youth (Treatment Worries Questionnaire – Child; TWQ-C) and their parents (Treatment Worries Questionnaire – Parent; TWQ-P). METHODS: Participants were 94 youth (7-17-years old) and parent dyads presenting for psychosocial treatment of an anxiety disorder. Prior to initiation of treatment, dyads completed the TWQ-C and TWQ-P along with a host of additional child and parent report measures, and three clinician-rated measures. RESULTS: Treatment worries were endorsed in the mild-moderate range by youth and the TWQ-C demonstrated good-excellent internal consistency and test-retest reliability, a strong three-factor structure, and consistent convergent and divergent relationships. Treatment worries were endorsed in the low mild range by parents and the TWQ-P demonstrated fair-good internal consistency and test-retest reliability, a less empirically, but theoretically, supported four-factor structure, and consistent divergent relationships, but variable (by factor) convergent relationships. DISCUSSION: The results of the present study provide information on the concept of treatment worries and support the use of the TWQ-C and TWQ-P as broad assessments of the concept in a variety of populations. Low endorsement of worries among parents likely relates to the nature of the present sample (treatment-seeking) and may have contributed significantly to the less ideal psychometrics of the TWQ-P in comparison to the TWQ-C. Future investigation of treatment worries using the TWQ-C and TWQ-P in a variety of samples is warranted.
119

The Boy in the Tunnel

Wright, Rachel 08 August 2017 (has links)
The Boy in the Tunnel is a domestic coming-of-age novel told from three alternating perspectives. It is about two white teenage girls who cover up the accidental death of their black friend in Atlanta during the summer of 1994. The novel explored the insidious nature of racial prejudice and the many ways in which Americans deny responsibility for wrongdoing—both contemporary and historical. It also explores the intense nature of female teenage friendships and the harsh realities of the adult world in comparison with the relative simplicity of childhood.
120

An Investigation of the Career Realities and Occupational Concerns of Selected Professional Performing Musicians

Hill, Dennis R. (Dennis Roy) 08 1900 (has links)
The purpose was to investigate the career realities and occupational concerns of successful full-time performing instrumentalists. Four research problems were formulated; (1) the establishment of a demographic profile of musicians who perceived themselves successful; (2) the determination of the musicians' career realities; (3) the determination of the musicians' occupational concerns; and (4) a comparison of the relationship of the demographic profile to the career realities and occupational concerns. A pilot study was used to develop a questionnaire and an interview schedule. The sample for the main study was chosen by the questionnaire and consisted of twenty musicians, five each in the musical categories of jazz, classical, commercial and pop. To resolve research problem one, the questionnaire also collected general demographic data. Research problems two and three were fulfilled by an interview schedule based upon career realities and occupational concerns cited in previous sociological studies. The realities and concerns were either confirmed or refuted by each interviewee. The career realities were role conflict, career contingencies, musical labels, life style, hierarchies, audience relationships and environment. The occupational concerns were mobility, status, entrapment, personal contacts, dependency, security, competition, economic issues, working conditions, travel requirements, appearance, management control, auditions, maintenance of skills and training relevancy. The interviews were taped and transcribed by a court reporter and included in the text. An analysis of the interviews in relation to the demographic data fulfilled research problem four. Results showed that career contingencies, mobility and life style were positive influences for the sampled musicians. Also, a "hierarchy of expertise" appeared as the ultimate occupational hierarchy for the sampled musicians. Furthermore, a "hierarchy of dependency," based upon instrument played, affected the sampled musicians' attitudes toward their careers. It was concluded that performers who were devoting their full time to performance were more tolerant of imperfect career conditions than had been cited in previous studies .

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