In the thesis the aim is to investigate different aspects of what teachers value when grading in Swedish physical education (PE) and to analyses how sociological background factors impact students’ grades. Grades in PE have included aspects other than those prescribed in the grading criteria, for instance motivation and effort. Teachers sometimes find their value-setting difficult to articulate and refer to a “gut feeling”. In order to explore both explicit and implicit forms of value-setting, the Repertory Grid interview technique is employed. The thesis includes four sub-studies, three interview studies with Swedish PE teachers and a fourth study based on registry data from the Swedish National Agency for Education. The data of all students leaving nine-year compulsory school in 2014 (n=95317) is analysed to explore how sociological background factors, such as migration background, parents’ education, school provider and gender, affect PE grades. The results reveal aspects of grading that are not detectable in the official description of the grading assignment and highlight problems that teachers need to address when grading. Four themes are discerned in the teachers’ grading practices: motivation, knowledge, confidence and social skills. The implementation of a new national curriculum with specified knowledge requirements seems to improve the alignment with the national criteria, but there is still a gap between policy and practice. The knowledge requirements for movement are often interpreted as performances in competitive sports, even if the teachers try to find other interpretations. The odds ratio for getting a higher grade in PE is greater for the variables migration background and parents’ education than for the other investigated variables. The concepts formulated by Bernstein are applied to explore the relations between teachers’ grading practices and cultural and political influences and to discuss how the tensions between different interests could affect teachers’ grading. The conclusion is that the gap between policy and practice confirmed in this study is related to tensions between the interests and purposes of different agents, all of whom strive to influence steering documents and practice. Cultural and political influences need to be considered and facilitate discussions about how to understand which knowledge is valued in PE and who has better possibilities to assimilate it. / Forskningslinjen Utbildning

A replication of an original study of managerial assessment centers performed by Sackett and Dreher (1982) is presented. Their major finding, indicating that assessment centers lack key tenets of internal construct validity, was corroborated in this study of a hotel managers' assessment center. This hotel managers' assessment center is also found to be externally valid using criterion-related validity. The argument is posed that assessment centers, as standardized tests of complex behavioral traits, appear to be operating outside the bounds of normal test construction principles. Five key explanations for this paradox are offered to guide much needed future research in this area. Additionally, a description of commonly utilized assessment center activities is offered the reader.

The presented work is concerning with ductile fracture problematic under monotonic loading which is result of gradual material degradation at large plastic deformation. At present, a large number of models, which calibration is not trivial, are used for its prediction. Ductile fracture mechanisms and cut-off region are described in the literature search part. Next, there is given a summary of criteria which are based on different approaches to ductile fracture. There were proposed and used KHPS and KHPS2 criteria within this PhD thesis. Procedure of assessment of the stress-strain curve and ductile fracture criteria calibration are described in last part of the literature search. A summary of tests, which were done in order to calibrate chosen criteria, is given in experimental part. Various stress states within broad range of stress triaxiality and Lode parameter were reached using these tests. Special type of specimen, by which very low stress triaxiality value is reached, was designed within this work. All specimens were made from the steel 12 050. Wrought rods of one melt with circular cross-section of 27 mm in diameter were used as semi-product. Calibration of chosen ductile fracture criteria was performed using foregoing tests. These criteria were implemented by author into explicit finite element software ABAQUS/Explicit using user subroutine VUMAT. Chosen criteria were used for simulation of multistep extrusion at which formation of internal central cracks occurs. These criteria were also used for simulation of cutting of circular cross-section rods. Results from simulation were compared to experiments which were done by industrial partner J-VST.

The main goal of this degree work is the application of methods of multiple criterion assessment of options for the choice of new vehicles. I have used three methods with cardinal information in this degree work. It is possible to classify these methods according to a calculation procedure, which is used for finding a compromise option. I have chosen the method of weighted sum based on the principle of the benefit maximilization, the method TOPSIS based on the distance minimalization from the ideal option, and the method ELECTRE III based on the preferential relation. I have used these methods for determination of the compromise option for the purchase of new vehicles. I have compared vehicle running costs and purchase costs with current costs delivered from a building company and then I have determinated an annual saving of costs. At the end of this degree work I have given renewal models which I have determined through the optimal method in the case of the renewal of worn-out equipment. I have analysed the problem from more views, from the view of the multiple criterion assessment of options, then from the costs view and finally from the view of renewal models.

Le but de la classification est de partager des ensembles de données en sous-ensembles les plus homogènes possibles, c'est-à-dire que les membres d'une classe doivent plus se ressembler entre eux qu'aux membres des autres classes. Le problème se complique lorsque le statisticien souhaite définir des groupes à la fois sur les individus et sur les variables. Le modèle des blocs latents définit une loi pour chaque croisement de classe d'objets et de classe de variables, et les observations sont supposées indépendantes conditionnellement au choix de ces classes. Toutefois, il est impossible de factoriser la loi jointe des labels empêchant le calcul de la logvraisemblance et l'utilisation de l'algorithme EM. Plusieurs méthodes et critères existent pour retrouver ces partitions, certains fréquentistes, d'autres bayésiens, certains stochastiques, d'autres non. Dans cette thèse, nous avons d'abord proposé des conditions suffisantes pour obtenir l'identifiabilité. Dans un second temps, nous avons étudié deux algorithmes proposés pour contourner le problème de l'algorithme EM : VEM de Govaert et Nadif (2008) et SEM-Gibbs de Keribin, Celeux et Govaert (2010). En particulier, nous avons analysé la combinaison des deux et mis en évidence des raisons pour lesquelles les algorithmes dégénèrent (terme utilisé pour dire qu'ils renvoient des classes vides). En choisissant des lois a priori judicieuses, nous avons ensuite proposé une adaptation bayésienne permettant de limiter ce phénomène. Nous avons notamment utilisé un échantillonneur de Gibbs dont nous proposons un critère d'arrêt basé sur la statistique de Brooks-Gelman (1998). Nous avons également proposé une adaptation de l'algorithme Largest Gaps (Channarond et al. (2012)). En reprenant leurs démonstrations, nous avons démontré que les estimateurs des labels et des paramètres obtenus sont consistants lorsque le nombre de lignes et de colonnes tendent vers l'infini. De plus, nous avons proposé une méthode pour sélectionner le nombre de classes en ligne et en colonne dont l'estimation est également consistante à condition que le nombre de ligne et de colonne soit très grand. Pour estimer le nombre de classes, nous avons étudié le critère ICL (Integrated Completed Likelihood) dont nous avons proposé une forme exacte. Après avoir étudié l'approximation asymptotique, nous avons proposé un critère BIC (Bayesian Information Criterion) puis nous conjecturons que les deux critères sélectionnent les mêmes résultats et que ces estimations seraient consistantes ; conjecture appuyée par des résultats théoriques et empiriques. Enfin, nous avons comparé les différentes combinaisons et proposé une méthodologie pour faire une analyse croisée de données. / Classification aims at sharing data sets in homogeneous subsets; the observations in a class are more similar than the observations of other classes. The problem is compounded when the statistician wants to obtain a cross classification on the individuals and the variables. The latent block model uses a law for each crossing object class and class variables, and observations are assumed to be independent conditionally on the choice of these classes. However, factorizing the joint distribution of the labels is impossible, obstructing the calculation of the log-likelihood and the using of the EM algorithm. Several methods and criteria exist to find these partitions, some frequentist ones, some bayesian ones, some stochastic ones... In this thesis, we first proposed sufficient conditions to obtain the identifiability of the model. In a second step, we studied two proposed algorithms to counteract the problem of the EM algorithm: the VEM algorithm (Govaert and Nadif (2008)) and the SEM-Gibbs algorithm (Keribin, Celeux and Govaert (2010)). In particular, we analyzed the combination of both and highlighted why the algorithms degenerate (term used to say that it returns empty classes). By choosing priors wise, we then proposed a Bayesian adaptation to limit this phenomenon. In particular, we used a Gibbs sampler and we proposed a stopping criterion based on the statistics of Brooks-Gelman (1998). We also proposed an adaptation of the Largest Gaps algorithm (Channarond et al. (2012)). By taking their demonstrations, we have shown that the labels and parameters estimators obtained are consistent when the number of rows and columns tend to infinity. Furthermore, we proposed a method to select the number of classes in row and column, the estimation provided is also consistent when the number of row and column is very large. To estimate the number of classes, we studied the ICL criterion (Integrated Completed Likelihood) whose we proposed an exact shape. After studying the asymptotic approximation, we proposed a BIC criterion (Bayesian Information Criterion) and we conjecture that the two criteria select the same results and these estimates are consistent; conjecture supported by theoretical and empirical results. Finally, we compared the different combinations and proposed a methodology for co-clustering.

Formative assessment lies not in enhancing what is, but in advancing toward what will be. Little research has been conducted on formative assessment practices, nor collegial practices in an EFL context. The purpose of the current study is to determine what formative assessment practices are in place in two upper-secondary schools and the impact that collegial learning plays in the adoption of these practices. This qualitative research design comprises four teachers and ten pupils using the focus group interview method. The findings reveal that there are several disparities in the two schools with regards to the adoption of formative practices, with one adhering to summative procedures. Furthermore, one of the more significant findings emerging from this study is that there seems to be a relation between collegial learning and common assessment practices. This finding has pedagogical implications which could be usefully explored in further research. Finally, this study also highlights that formative assessment practices can be implemented successfully without any resistance or reluctance from the learners.

O presente estudo pretendeu, por meio de uma abordagem qualitativa investigar quais os critérios utilizados pelas professoras das pré-escolas públicas do município de Osasco para promover alunos com necessidades educacionais especiais, assim denominados por apresentarem deficiência intelectual, de uma fase para outra e após essa etapa de escolarização. O suporte teórico fundamentou-se na legislação educacional nacional, estadual e municipal, além de produções de autores renomados na área sobre educação infantil, educação especial e avaliação da aprendizagem. Utilizaram-se, também, documentos internacionais que subsidiaram a elaboração de legislação nacional referente ao atendimento de pessoas com necessidades educacionais especiais. Foram selecionadas duas escolas, uma na zona Norte e outra na zona Sul do referido município. Fizeram parte da amostra cinco professoras e cinco alunos que se encaixavam no objetivo da pesquisa. Para complementar os dados coletados junto às professoras, foram entrevistadas também as ex-diretoras das escolas, assim como especialistas da Equipe de Apoio Interdisciplinar. Da análise das entrevistas, verificou-se que as professoras apontaram a idade como sendo critério para promoção dos alunos, tanto de uma fase para outra, como após a pré-escola. Contudo, em alguns casos, os alunos permaneciam por mais tempo na pré-escola o que era justificado pelas necessidades específicas apresentadas por eles e a permanência nessa etapa por mais tempo era avaliada, nesses casos, como benéfica para seu desenvolvimento e aprendizagem. A partir dos dados coletados, verificou-se que as escolas que fizeram parte da amostra da pesquisa adotam, para a quase totalidade dos alunos, a concepção de avaliação utilizada na Lei de Diretrizes e Bases da Educação (Lei nº 9394/96) para a educação infantil, não tendo, assim, finalidade de promoção nem mesmo para acesso ao ensino fundamental. / This study aimed, using a qualitative approach, to investigate which criterion were used by the preschool teachers in public schools in the municipality of Osasco to promote students with special needs, so called for presenting intellectual deficiency, from one phase to another and after this stage of education. The theoretical support was based on the national, state and municipal educational legislation, besides the productions of famous authors in the area on preschool education, special education and evaluation of learning. It was also used international documents that helped the development of the national legislation about attention to people with special educacional needs. Two schools, one in the North zone and another one in the South zone of the city that had been selected. Five teachers and five students, who fit in the objective of the research, had been part of the sample. The formerdirectors of the schools had also been interviewed, as well as specialists of the Equipe de Apoio Interdisciplinar to complement the data collected from the teachers. From the analysis of the interviews, it was verified that the teachers had pointed the age as the criterion of student´s promotion from one phase to another and after preschool. However, in some cases the students remained for more time in the preschool, what was justified by the student´s specific needs and their longer permanence at this stage was evaluated as beneficial to theis development and learning. From the collected data, it was verified that the schools that had been part of the sample of the research adopt, for almost all students, the conception of evaluation used in Lei de Diretrizes e Bases da Educação (Law nº 9394/96) to early childhood education, so it does not have the purpose of promotion, nor the access to primary school.

O presente trabalho visa o estudo e avaliação de diversos modelos de falha através de ensaios experimentais e análises numéricas. A caracterização do material foi feita por meio de ensaios de tração de espécimes com e sem entalhe e de cisalhamento, para prover dados em uma ampla faixa de triaxialidade. A calibração dos parâmetros necessários para cada modelo de falha ocorreu através da obtenção das componentes de tensões e de deformações na região de ruptura, obtidas por meio de análises numéricas destes ensaios. O critério da máxima deformação plástica equivalente, modelo de dano de Johnson-Cook e critério da máxima tensão cisalhante foram aplicados em um caso de impacto em pára-choque. Diversos ensaios de impacto foram realizados até a que se atingisse a ruptura satisfatória do componente. Os ensaios foram modelados em elementos finitos, através do programa comercial LS-Dyna®, sendo que os modelos de falha calibrados foram aplicados para o ensaio onde se ocorreu ruptura. Houve boa concordância entre os resultados obtidos numericamente e experimentalmente, respeitadas as observações realizadas acerca da especificidade deste caso de impacto em baixa velocidade. / The aim of the present work is an assessment of several fracture models through experiments and numerical simulations. Tensile tests with notched and unnotched specimens were carried out to provide the material characterization in a wide range of stress triaxiality. The calibration of the parameters required by the fracture models was enabled by the parallel numerical simulation of the tensile tests, providing information on the stress and strain components at the failure locus. The constant equivalent strain criterion, the Johnson-Cook failure model and the maximum shear stress failure criterion were applied in a bumper beam impact case study. Several low speed impact tests were carried out in order to result in the components rupture. Numerical simulation of the experiments was performed using commercial finite element code LS-Dyna®. Good correlation of experiments and numerical simulations was achieved when considering this particular low speed case study.

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No. of bitstreams: 1 MARIA APARECIDA DA SILVA ABRANCHES.pdf: 15557749 bytes, checksum: 196c5e6acc36be9480d35631c759cd68 (MD5) Previous issue date: 2017-03-31 / This research has as object the logics of legitimation and the processes of relative autonomization of the Brazilian advertising field considering the so-called creative advertising. In this research, we consider that the discourse on creative advertising is consumed as a symbolic good, and the agents of the field value it this way. From this perspective, we formulate our research problem: how the Brazilian advertising field reaches its relative autonomy, considering the speeches on the award criteria in the Letters of the presidents published in the annuals of the Club of Creation of São Paulo. To our analysis, we consider the discourses of the creative advertising of the pieces awarded with gold medal by said Club as well. The empirical object is composed of two corpora: 40 Letters of the Presidents of the Creation Club and 103 printed pieces that received Gold Medal (1975-2015) by the Creation Club, which, as a legitimized institution by the Brazilian publicity field, publishes without interruption, for 40 years, a Yearbook that records the best works. We have as main objective to problematize the legitimacy logics of the Brazilian advertising field, from a view on creative advertising. Our secondary objectives are to establish relationships between some moments of the Brazilian consumer society and the development of the advertising field in our country. Analyze the subfield of advertising creation in the context of the creative revolution, which gives rise to what is called creative advertising. Analyze the saying and not-sayings of the discursive formation of publicity, particularly those related to criteria of judgment. Analyze the technical elements (creative resources) responsible for what we call the creative distinction of the awarded pieces. Identify the tacit or explicit criteria involved in evaluating and judging advertising pieces in the context of awarding and legitimating the Brazilian advertising field. The thesis consists of two parts, subdivided into two chapters. In the first part, in chapter 1, we use the theories of the French sociologist Pierre Bourdieu, particularly his theories of the fields, to reflect on the legitimacy logics and the processes of relative autonomization of the Brazilian advertising field. In Chapter 2, we are particularly dedicated to the subfield of advertising creation. The second part of this work is dedicated to the analysis of the two corpora that integrate organically only one empirical object: in chapter 3, we analyze the sayings and not sayings of the Letters on criteria of judgment of the pieces consecrated in the awarding from the theoretical-methodological framework of the French Speech Analysis. In chapter 4, we analyze the Pieces from the reflection of Brazilian researchers in the area of advertising creation, as well as by means of a Protocol of Analysis proposed by the author. The achieved results allow us to affirm that the concept of creative distinction helps to reveal that the consecration of the pieces in the context of awards, is the result of a complex operation that involves the technical evaluation of the piece and the legitimacy logics of agents in the subfield of advertising creation, considering the socio-historical conditions of production and evaluation of the pieces. / Esta pesquisa tem como objeto as lógicas de legitimação do campo publicitário brasileiro no processo de sua autonomização relativa, a partir de uma visada sobre a publicidade criativa. Considerando-se que o discurso sobre a publicidade criativa é consumido como bem simbólico e valorizado pelos agentes do campo, formulamos nosso problema de pesquisa: como o campo publicitário brasileiro consolida sua autonomia relativa, a partir dos discursos sobre os critérios de premiação presentes nas Cartas dos presidentes publicadas nos anuários do Clube de Criação de São Paulo, bem como dos discursos da publicidade criativa expressos em peças premiadas com medalha de ouro pelo referido Clube? O objeto empírico é composto por dois corpora: 40 Cartas dos Presidentes do Clube de Criação e 103 Peças impressas que receberam medalha de Ouro (1975-2015) pelo Clube de Criação que, além de ser legitimado pelo campo publicitário brasileiro, publica ininterruptamente, há 40 anos, um Anuário que registra os melhores trabalhos. Temos como objetivo principal problematizar as lógicas de legitimação do campo publicitário brasileiro, a partir de uma visada sobre a publicidade criativa. E como objetivos secundários: estabelecer relação entre alguns momentos da sociedade de consumo brasileira com o desenvolvimento do campo publicitário em nosso país; analisar o subcampo da criação publicitária no contexto da revolução criativa, que dá origem ao que se denomina publicidade criativa; analisar os ditos e não-ditos da formação discursiva publicitária, particularmente aqueles relativos a critérios de julgamento; analisar os elementos técnicos (recursos criativos) responsáveis pelo que denominamos distinção criativa das peças premiadas; identificar os critérios tácitos ou explícitos envolvidos na avaliação e julgamento de peças publicitárias no contexto da premiação e de legitimação do campo publicitário brasileiro. A tese é composta por duas partes, cada uma subdividida em dois capítulos. Na primeira parte, no capítulo 1, a partir dos estudos sobre campo do sociólogo francês Pierre Bourdieu, refletimos sobre as lógicas de legitimação e os processos de autonomização relativa do campo publicitário brasileiro; já no capítulo 2, dedicamo-nos particularmente ao subcampo da criação publicitária. A segunda parte deste trabalho dedica-se à analise dos dois corpora que integram organicamente uma só empiria: no capítulo 3, analisamos os ditos e não-ditos das Cartas sobre critérios de julgamento das peças consagradas na premiação a partir do quadro teóricometodológico da Análise de Discurso de linha francesa. No capítulo 4, dedicamo-nos a análise das Peças a partir da reflexão de pesquisadores brasileiros da área da criação publicitária, bem como por meio de um Protocolo de Análise proposto pela autora. Quanto aos resultados alcançados, podemos afirmar que o conceito de Distinção Criativa auxilia a revelar que a consagração das peças em contexto de premiação é resultado de uma complexa operação que envolve a valoração técnica da peça e as lógicas de legitimação dos agentes no subcampo da criação publicitária, considerando as condições sócio-históricas de produção e avaliação das peças.

Ce travail de thèse s'intéresse au problème de l'optimisation globale d'une fonction coûteuse dans un cadre bayésien. Nous disons qu'une fonction est coûteuse lorsque son évaluation nécessite l’utilisation de ressources importantes (simulations numériques très longues, notamment). Dans ce contexte, il est important d'utiliser des algorithmes d'optimisation utilisant un faible nombre d'évaluations de cette dernière. Nous considérons ici une approche bayésienne consistant à affecter à la fonction à optimiser un a priori sous la forme d'un processus aléatoire gaussien, ce qui permet ensuite de choisir les points d'évaluation de la fonction en maximisant un critère probabiliste indiquant, conditionnellement aux évaluations précédentes, les zones les plus intéressantes du domaine de recherche de l'optimum. Deux difficultés dans le cadre de cette approche peuvent être identifiées : le choix de la valeur des paramètres du processus gaussien et la maximisation efficace du critère. La première difficulté est généralement résolue en substituant aux paramètres l'estimateur du maximum de vraisemblance, ce qui est une méthode peu robuste à laquelle nous préférons une approche dite complètement bayésienne. La contribution de cette thèse est de présenter un nouvel algorithme d'optimisation bayésien, maximisant à chaque étape le critère dit de l'espérance de l'amélioration, et apportant une réponse conjointe aux deux difficultés énoncées à l'aide d'une approche Sequential Monte Carlo. Des résultats numériques, obtenus à partir de cas tests et d'applications industrielles, montrent que les performances de notre algorithme sont bonnes par rapport à celles d’algorithmes concurrents. / This thesis deals with the problem of global optimization of expensive-to-evaluate functions in a Bayesian framework. We say that a function is expensive-to-evaluate when its evaluation requires a significant amount of resources (e.g., very long numerical simulations).In this context, it is important to use optimization algorithms that can deal with a limited number of function evaluations. We consider here a Bayesian approach which consists in assigning a prior to the function, under the form of a Gaussian random process. The idea is then to choose the next evaluation points using a probabilistic criterion that indicates, conditional on the previous evaluations, the most interesting regions of the research domain for the optimizer. Two difficulties in this approach can be identified: the choice of the Gaussian process prior and the maximization of the criterion. The first problem is usually solved by using a maximum likelihood approach, which turns out to be a poorly robust method, and to which we prefer a fully Bayesian approach. The contribution of this work is the introduction of a new Bayesian optimization algorithm, which maximizes the Expected Improvement (EI) criterion, and provides an answer to both problems thanks to a Sequential Monte Carlo approach. Numerical results on benchmark tests show good performances of our algorithm compared to those of several other methods of the literature.