Este trabalho trata de modelos de regressão quantílica. Foi feita uma introdução a essa classe de modelos para motivar a discussão. Em seguida, conceitos inferenciais, como estimação, intervalos de confiança, testes de hipóteses para os parâmetros são discutidos, acompanhados de alguns estudos de simulação. Para analisar a qualidade do ajuste, são apresentados o coeficiente de determinação e um teste de falta de ajuste para modelos de regressão quantílica. Também é proposta a utilização de gráficos para análise da qualidade do ajuste considerando a distribuição Laplace Assimétrica. Uma aplicação utilizando um banco de dados com informação sobre renda no Brasil foi utilizado para exemplificar os tópicos discutidos durante o texto. / This work is about quantile regression models. An introduction was made to this class of models to motivate the discussion. Then, inferential concepts, like estimation, confidence intervals, tests of hypothesis for the parameters are discussed, followed by some simulation studies. To analyse goodness of fit, a coefficient of determination and a lack-of-fit test for quantile regression models are presented. Its also proposed the use of graphs for the goodness of fit analysis considering the Asymmetric Laplace Distribution. An application using a data base with information about income in Brazil was used to exemplify the topics discussed during the text.

Este trabalho trata da proposta de um processo de otimização para o problema do posicionamento rotacional e translacional de formas irregulares em recipientes de dimensões fixas baseado em heurísticas probabilísticas sem o uso de penalização externa. Para tanto, é empregado o polígono de obstrução, acoplado a uma heurística baseada no Recozimento Simulado. O comportamento discreto da função custo em problemas com recipientes de dimensões limitadas foi mitigado através de uma heurística de \"desempate\", que busca diferenciar soluções com valores idênticos através de uma estimativa de quão próxima está uma determinada solução de conseguir encaixar uma forma não-encaixada em seu leiaute. A comparação de resultados deste trabalho com resultados publicados na literatura comprova a validade da abordagem aqui adotada. / This work deals with the proposal of an optimization process for the packing problem with free translations and rotations of irregular shapes on containers with limited dimensions based on probabilistic heuristics without use of extern penalty techniques. For such, the no-fit polygon is used, coupled with an heuristic based on Simulated Annealing. The discrete behavior of the objective function in problems with limited containers is mitigated by a \"tie breaker\" heuristic that sorts solutions with identical values by estimating how close a given solution is of fitting an unplaced shape on its layout. The comparison of these work\'s results with results published on the literature validates the approach here adopted.

Contrariando o caráter universalista das abordagens clássicas anteriores, a Teoria da Contingência defende que não há uma melhor forma de se organizar. Conforme o contexto ambiental apresentado, a organização deve se estruturar de uma maneira diferente. No âmbito da contabilidade gerencial, os estudiosos desta teoria argumentam que não há como desenvolver um Sistema de Contabilidade Gerencial (SCG) que tenha a mesma eficiência em todas as situações. Diferentes ambientes requerem diferentes modelos de estratégia e estrutura organizacional, o que termina por impactar a forma como o SCG é organizado. Amparada então pela teoria contingencial, a presente pesquisa tem por objetivo identificar e analisar os arranjos promovidos pelo encaixe existente entre os fatores ambientais e organizacionais nas maiores empresas atuantes no mercado brasileiro. Os fatores empregados são: ambiente, tecnologia, estratégia, estrutura organizacional, atributos do SCG e desempenho organizacional. Para cada fator, há uma ou mais variável que procura mensurar o quanto as características tratadas estão presentes. A coleta dos dados se deu por meio de questionários enviado às empresas constantes no projeto Melhores & Maiores, edição 2006. A amostra final é composta por 104 participantes, a partir da qual se empregou estatística descritiva e Análise de Cluster. Os resultados revelaram três arranjos. O primeiro é composto por empresas com ambiente competitivo, tecnologias modernas e não-padronizadas, estratégia de diferenciação, estrutura orgânica e atributos do SCG sofisticados (instrumentos e práticas modernas, informações tempestivas, agregadas, integradas, não-financeiras, focadas no ambiente externo e no futuro). O segundo é composto por empresas com ambiente estável e protegido, tecnologias pouco padronizadas e pouco desenvolvidas, estratégia de liderança em custos, estrutura mecanicista e atributos do SCG menos sofisticadas (instrumentos e práticas tradicionais, informações não-tempestivas, não-agregadas, não-integradas, financeiras, focadas no ambiente interno e no passado). O terceiro arranjo é composto por empresas com ambiente e atributos do SCG semelhantes ao primeiro, e com estratégia e estrutura similar ao segundo. Nos dois arranjos iniciais o desempenho mostra-se superior e considerando ainda que a disposição das variáveis convergem com os resultados empíricos de outras investigações, conclui-se que nestes arranjos há um maior encaixe entre os fatores situacionais do que no terceiro. O estudo ainda conclui que ajustar os atributos do Sistema de Contabilidade Gerencial a cada contexto ambiental e organizacional resulta na utilização mais eficiente dos recursos aplicados neste sistema. / Unlike the universal character of previous classical approaches, the Contingency Theory claims that there is not one best way for organization. Thus, companies should structure themselves differently, in accordance with the environmental context they find themselves in. In the field of managerial accounting, researchers of this theory argue that it is not possible to develop a Managerial Accounting System (MAS) that presents the same effectiveness in all situations. Different environments require different strategies and organizational structures, which end up impacting the form in which the MAS is organized. Therefore, based on the Contingency Theory, the purpose of this research is to identify and analyze the arrangements that are made by the adjustment of environmental and organizational factors in the largest companies in the Brazilian market. The factors that are utilized are the following: environment, technology, strategy, organizational structure, MAS attributes, and organizational performance. For each factor there are one or more variables which seek to measure the extent of the presence of the characteristic being considered. Data was collected by means of questionnaires which were sent to the companies listed in the Melhores & Maiores project, 2006. The final sample consists of 104 participants, and this sample was subjected to descriptive statistics and Cluster Analysis. The results revealed the existence of three arrangements. The first consists of companies with a competitive environment, modern and non standardized technology, differentiation strategies, organic structure and sophisticated MAS attributes (advanced management accounting practices, and timely, aggregated, integrated, and non financial information focused on the external environmental and in the future). The second consists of companies in a stable and protected environment, with technology without much standardization and development, low price strategy, mechanistic structure, and less sophisticated MAS attributes (traditional management accounting practices, and untimely, non aggregate, non integrated, non financial information focusing on the internal environment and in the past). The third arrangement consists of companies in an environment and with MAS attributes which are similar to the first arrangement, and with strategies and structure similar to the second. The first two arrangements presented superior performance, and considering that the dispositions of the variable converge with the empirical results of other investigations, it is concluded that these arrangements achieve greater fit between situational factors than in the third. The study also concludes that the fit of the MAS attributes to each different environmental and organizational context results in more efficient utilization of the resources applied in such system.

Contrariando o caráter universalista das abordagens clássicas anteriores, a Teoria da Contingência defende que não há uma melhor forma de se organizar. Conforme o contexto ambiental apresentado, a organização deve se estruturar de uma maneira diferente. No âmbito da contabilidade gerencial, os estudiosos desta teoria argumentam que não há como desenvolver um Sistema de Contabilidade Gerencial (SCG) que tenha a mesma eficiência em todas as situações. Diferentes ambientes requerem diferentes modelos de estratégia e estrutura organizacional, o que termina por impactar a forma como o SCG é organizado. Amparada então pela teoria contingencial, a presente pesquisa tem por objetivo identificar e analisar os arranjos promovidos pelo encaixe existente entre os fatores ambientais e organizacionais nas maiores empresas atuantes no mercado brasileiro. Os fatores empregados são: ambiente, tecnologia, estratégia, estrutura organizacional, atributos do SCG e desempenho organizacional. Para cada fator, há uma ou mais variável que procura mensurar o quanto as características tratadas estão presentes. A coleta dos dados se deu por meio de questionários enviado às empresas constantes no projeto Melhores & Maiores, edição 2006. A amostra final é composta por 104 participantes, a partir da qual se empregou estatística descritiva e Análise de Cluster. Os resultados revelaram três arranjos. O primeiro é composto por empresas com ambiente competitivo, tecnologias modernas e não-padronizadas, estratégia de diferenciação, estrutura orgânica e atributos do SCG sofisticados (instrumentos e práticas modernas, informações tempestivas, agregadas, integradas, não-financeiras, focadas no ambiente externo e no futuro). O segundo é composto por empresas com ambiente estável e protegido, tecnologias pouco padronizadas e pouco desenvolvidas, estratégia de liderança em custos, estrutura mecanicista e atributos do SCG menos sofisticadas (instrumentos e práticas tradicionais, informações não-tempestivas, não-agregadas, não-integradas, financeiras, focadas no ambiente interno e no passado). O terceiro arranjo é composto por empresas com ambiente e atributos do SCG semelhantes ao primeiro, e com estratégia e estrutura similar ao segundo. Nos dois arranjos iniciais o desempenho mostra-se superior e considerando ainda que a disposição das variáveis convergem com os resultados empíricos de outras investigações, conclui-se que nestes arranjos há um maior encaixe entre os fatores situacionais do que no terceiro. O estudo ainda conclui que ajustar os atributos do Sistema de Contabilidade Gerencial a cada contexto ambiental e organizacional resulta na utilização mais eficiente dos recursos aplicados neste sistema. / Unlike the universal character of previous classical approaches, the Contingency Theory claims that there is not one best way for organization. Thus, companies should structure themselves differently, in accordance with the environmental context they find themselves in. In the field of managerial accounting, researchers of this theory argue that it is not possible to develop a Managerial Accounting System (MAS) that presents the same effectiveness in all situations. Different environments require different strategies and organizational structures, which end up impacting the form in which the MAS is organized. Therefore, based on the Contingency Theory, the purpose of this research is to identify and analyze the arrangements that are made by the adjustment of environmental and organizational factors in the largest companies in the Brazilian market. The factors that are utilized are the following: environment, technology, strategy, organizational structure, MAS attributes, and organizational performance. For each factor there are one or more variables which seek to measure the extent of the presence of the characteristic being considered. Data was collected by means of questionnaires which were sent to the companies listed in the Melhores & Maiores project, 2006. The final sample consists of 104 participants, and this sample was subjected to descriptive statistics and Cluster Analysis. The results revealed the existence of three arrangements. The first consists of companies with a competitive environment, modern and non standardized technology, differentiation strategies, organic structure and sophisticated MAS attributes (advanced management accounting practices, and timely, aggregated, integrated, and non financial information focused on the external environmental and in the future). The second consists of companies in a stable and protected environment, with technology without much standardization and development, low price strategy, mechanistic structure, and less sophisticated MAS attributes (traditional management accounting practices, and untimely, non aggregate, non integrated, non financial information focusing on the internal environment and in the past). The third arrangement consists of companies in an environment and with MAS attributes which are similar to the first arrangement, and with strategies and structure similar to the second. The first two arrangements presented superior performance, and considering that the dispositions of the variable converge with the empirical results of other investigations, it is concluded that these arrangements achieve greater fit between situational factors than in the third. The study also concludes that the fit of the MAS attributes to each different environmental and organizational context results in more efficient utilization of the resources applied in such system.

Challenging behavior in preschool is a serious concern for teachers. In recent years, positive behavior support (PBS) has been shown to be effective in reducing such behaviors. Class-Wide Function-related Intervention Teams (CW-FIT) is a specific program for implementing PBS principles in classroom settings. CW-FIT is a group contingency that utilizes social skills training, teacher praise, and positive reinforcement to improve student behavior. Students are taught specific social skills and then work in teams to earn a group reward based on the use of these skills. CW-FIT has been shown to be effective in elementary classrooms but has not yet been evaluated with other age groups. The present study examined the effects of CW-FIT implementation on teacher praise rates and student engagement in four preschool classrooms with 55 total students. A single-subject, multiple-baseline design with embedded reversals was used to evaluate impact. Results indicate that CW-FIT increased teacher praise rates and student engagement while reducing student disruptive behavior. Both teachers and students found CW-FIT to be socially valid. The present study indicates promising results for the implementation of CW-FIT in a preschool setting.

Challenging and disruptive student behavior is a major concern for all teachers, including those who teach art. Unfortunately, there is a lack of research and resources available for art teachers to manage student behavior. School-wide positive behavior support (SWPBS) is a framework that has been shown to improve student behavior. Class-wide Function-Related Intervention Teams (CW-FIT) is an intervention that utilizes SWPBS principles including group contingency, social skills instruction, teacher praise, and positive reinforcement and has been shown to be effective in general education classrooms. This is the first study of CW-FIT in elementary art classrooms and examined the effects of the intervention on teacher praise-to-reprimand rates and student on-task behavior in three classrooms. The first classroom utilized an AB design while the other two used a reversal (ABAB) design to evaluate impact. The results indicated the teacher was able to implement CW-FIT with fidelity, increase praise-to-reprimand ratios, and increase group on-task behavior. Finally, both the teacher and students found it to be socially valid. Limitations and implications of this study for researchers and practitioners are discussed.

Denna studie tas fram i samarbete med ett stort svenskt modeföretag som har haft återkommande problem med balansen mellan fram och bak på dam-kavajer. Problemet uppstår oberoende av vilken leverantör som har tillverkat mönstret eller vilken provperson som provar plagget. Syftet med studien är att undersöka vad som orsakar balansfel mellan fram och bak i kavajer för dam och hur det kan åtgärdas. Studien undersöker olika konstruktioner från litteratur, som arbetas vidare med för att uppnå god passform. Den slutliga konstruktionen jämförs sedan med företagets kavaj som erhåller balansproblem för att se vilka åtgärder som bör göras på dessa kavajer. Studien utförs genom mönsterkonstruktion i ett CAD-program, uppsömnad av prototyper och slutligen avprovningar på en provdocka, tre provpersoner och virtuellt på en avatar i ett 3D- simuleringsprogram. Skillnaderna i passform mellan den obalanserade kavajen och den nya balanserade prototypen analyseras vid avprovningar. Resultatet visar ett kavaj-grundmönster där företagets återkommande balansproblem har korrigerats. Under studien framkommer det att balansproblemen mellan fram och bak hänger ihop med hur långt eller kort slaget är. Även axelsömmens lutning har stor betydelse för plaggets balans. / This study is developed in collaboration with a large Swedish fashion company that has had recurring problems with the balance between front and back of women's jackets. The problem arises regardless of which supplier has made the pattern or which test person is testing the garment. The purpose of the study is to investigate what causes balance problems between front and back of women’s jackets and how it can be corrected. The study examines various constructions from literature, which are further worked on to achieve a good fit. The final design is then compared to the company's jacket that receives balance problems to see what actions should be taken on these jackets. The study is performed through pattern design in a CAD program, then prototypes are being sewn. Finally they are tested on one dummy, three test persons and it is also tested virtual on an avatar in a 3D simulation program. The differences in fit between the unbalanced jacket and the new balanced prototype are analyzed during tests. The result shows a basic pattern of a jacket where the company's recurring balance problems have been corrected. During the study it appears that the balance problems between the front and the back are linked to how long or short the lapel is. The tilt of the shoulder seam is also of great importance for the garment's balance.

Numerous research studies have concluded that values drive perceptions, responses to situations, judgments, interactions among people, and behaviors. In addition, studies have found that congruence or agreement between individual values and organizational values can increase job satisfaction and commitment. Minimal research has explored the concept of value congruence between substance abuse counselors and their treatment settings, and its impact on perceived ethical work behaviors and organizational commitment. This study explored how the extent of fit between individual and organizational values impacts ethical work behaviors and organizational commitment of substance abuse counselors.

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