[pt] A tese apresenta pesquisa realizada com professores contratados do Departamento do Primeiro Segmento do Colégio Pedro II tendo como questão principal: O que os relatos dos docentes contratados do Departamento do Primeiro Segmento do CPII nos dizem sobre o significado de seu trabalho, sua identidade e experiência? Tardif e Lessard (2005) são referenciais teóricos usados para as reflexões sobreo trabalho docente, com as categorias teóricas atividade, experiência e identidade; Ball (2001, 2012) contribui com o conceito de atuação de políticas, e Dubet (2014), com a discussão sobre desigualdades. Como referencial teórico-metodológico foi utilizado Goffman, com os conceitos de face e estigma, entre outros, e para a análise sociolinguístico-interacional. A pesquisa qualitativa utilizou como estratégias de coleta e geração de dados: a) pesquisa bibliográfica sobre leis e documentos reguladores do trabalho de professores contratados no Colégio Pedro II, b) entrevistas semiestruturadas com quinze professoras, c) catorze entrevistas com gestores do Colégio e representantes da Associação de Docentes. A análise de conteúdo foi utilizada para a análise dos dados coletados em documentos e gerados nas entrevistas. Buscou-se, também, através do diálogo entre a Educação e a Linguagem, especialmente a Sociolinguística Interacional (GOFFMAN, 2013 [1964], 2013 [1979], b MISHLER, 1986a, 1986b), analisar as entrevistas como um encontro social, assim, a interação da entrevistadora com os entrevistados e a construção do sentido pelos atores foram também colocadas em foco. Como resultados, constatou-se que as professoras contratadas do Colégio Pedro II têm mais direitos assegurados que colegas de outras redes, como constatado na revisão empírica. Sobre a atividade docente, as professoras indicam valorizar a estrutura física e acompanhamento pedagógico realizado pelas equipes de Orientação e Coordenação, e percebem-se mais satisfeitas no trabalho, apesar da precariedade formal, do que em outras redes onde trabalham. A experiência de trabalho foi vista como formativa, percebida como uma faculdade, momento de renovação, de capacitação. Algumas professoras destacam ter aprendido a dar aula, a avaliar e a ensinar adaptando o ritmo e conteúdos às necessidades dos alunos. A experiência de contrato é procurada como um possível trampolim para a condição de efetiva, desejo da maioria. Em relação à identidade, embora a experiência de trabalho tenha propiciado uma ressignificação do ser professora para algumas, criticam a falta de aval para a realização de alguns projetos, a falta de voz para a manifestação em alguns espaços, e outras se sentem uma mão de obra descartável, apesar de perceberem o quanto a escola precisa de seu trabalho. Demandam um tratamento mais igualitário, tanto em aspectos formais (horas trabalhadas, salário), quanto simbólico, e sugerem a valorização de sua experiência nos concursos para efetivos. A análise sociolinguístico-interacional mostra como as professoras procuraram, durante a interação, equilibrar a dupla hierarquia de poder (pesquisadora e professora efetiva x entrevistada e professora contratada) e o estigma do qualificante contratada, através de estratégias de anulação do estigma, por meio da construção de uma face de professoras competentes, merecedoras de pertencer ao Colégio Pedro II, ou pela denúncia do estigma que marca a situação de professora contratada. / [en] The thesis presents a research carried out with substitute teachers of the First Segment Department of the Colégio Pedro II and it has as the main question: What do the reports of the substitute teachers of the CPII s First Segment Department tell us about the meaning of their work, their identity and experience? As theoretical references, Tardif and Lessard (2005) were used for the reflections on the teaching work and theoretical categories (activity, experience and identity); Ball (2001, 2012), for the theoretical reflection on the concept of policy and policy enanctment, and Dubet (2014), for the discussion on inequalities. Goffman s concepts of face and stigma, among others, was used as theoretical-methodological reference, including the socio-linguistic-interactional analysis The research has a qualitative framework. The researcher used as strategies to collect and generate data: a) bibliographical research on laws and regulatory documents of the work of substitute teachers in Colégio Pedro II, b) semistructured interviews with fifteen teachers, c) fourteen interviews with schools managers and Teacher s Association delegates. Content analysis was used to analyze the data collected in documents and generated in interviews. The dialogue between Education and Language, especially Interational Sociolinguistics (GOFFMAN, 2013 [1964], 2013 [1979], b MISHLER, 1986a, 1986b), contributed to analyze the interviews as a social event. The interviewer s interaction with the interviewees and the construction of meaning by the actors were also placed in focus. As a result, the substitute teachers of Colégio Pedro II have more assured rights than colleagues from other networks in Brazil. Regarding the teaching activity, the teachers indicate that they value the school structure, both physical and pedagogical – the last carried out by the Orientation and Coordination teams. Despite the formal precariousness they are more satisfied than the substitute teachers of other networks, public or private. The work experience was perceived as formative, a faculty, renewal, empowerment moment. Some teachers emphasize having learned to teach, to evaluate, and also to teach by adapting the rhythm and content to the needs of the students. The experience of contract is sought as a possible trampoline to the condition of permanent teacher, the majority s desire. Regarding identity, although the work experience has led to a re-signification of being a teacher for some, they criticize the lack of endorsement for the realization of some projects, the lack of voice for the manifestation in some spaces. Some of the substitute teachers feel as a disposable labor even though they realize how much the school needs their work. They demand more egalitarian treatment, both in formal (worked hours, salary) and symbolic aspects, and they suggest that their experience should be valued in permanent teachers’selection. The sociolinguistic analysis shows how teachers manage, during the interviews, to balance the dual hierarchy of power (permanent teacher researcher vs. interviewed substitute teacher) and the stigma of the substitute, through stigma avoidance strategies and the construction of a competent teachers face, or through the reporting the stigma that marks the position of substitute teacher.

Short-term foster care is a fairly new form of substitute family care. Despite it having been incorporated in law since 2006, short-term foster care have only begun being employed seven years later. Only then the details of its administration were laid out in legislation. Purpose of this form of substitute family care is to prevent a placement of children into institutional care. It's possible to look at the professional foster care from different angles and thus assess it differently. Certainly, it has its positive and negative aspects as well as possible problems. It's undeniable that a well-functioning family is the best environment for raising and caring for a child. Forming an emotional bond is one of the most discussed factors contributing to the proper development of children placed in short-term foster care. Experts as well as the general public are looking for answers to the questions whether or not it's in the interest of the child to form an attachment to someone who's with them only for a short period of time, which children is professional foster care best suited for, whether children living in short-term foster care placements are less prone to suffer from emotional deprivation than children placed in institutional care or whether the duration of this form of foster care is sufficient. More questions arise over the degree of health care provided to infants placed with a professional forster family as well as over the level of risk of these children suffering traumas and stigmatizing experience compared to children living in institutional care. The objective of this thesis is to survey and assess the experience gained so far from implementing short-term foster care and to try and describe based on (previously) established facts how the children benefit from this form of substitute family care. In order to meet the set objective I chose a qualitative research strategy, the interview as a method, a semi-structured interview and a secondary analysis strategies. The results show that the most common reason for placing a child in this form of foster care is the impending adoption, i. e. it's mainly being used for infants whilst adoption placements are sorted out for them. To a lesser extent there are other reasons, respectively a minimum of older children are placed with professional foster families. Given these facts, it appears necessary to regard the short-term foster care differently depending on the age group of children placed in it. Undeniable merits of all cases of short-term foster care are an individual approach to each child that minimizes emotional deprivation and development of trauma, the development of the attachment behaviour and enough stimuli to influence a child's development. In the case of older children these are an experience of living in a well-functioning family and a positive educational impact. Developing an attachment between the child and the foster parent and then losing it because of the child's departure from a family is more risky for older children than newborns and toddlers. Claim that no attachment is to be formed between the child and the foster parent proved entirely unrealistic. The lack of permanent medical supervision can be seen as a disadvantage of professional foster care especially from the perspective of child welfare workers. Children placed for adoption often come from not monitored pregnancies or parents at-risk, i.e. these are children with unknown history whose development can therefore be risky, so they require a professional medical care in the first weeks of their lives. Research results have also indicated foster parents' positive motivation to professional fostering, an undisputed enrichment that this occupation brings their entire families and a satisfaction resulting from the meaningfulness of their work. The author believes that the institute of short-term foster care is undoubtedly very beneficial for a certain category of

The topic of my thesis is importace of foster care in the social-legal protection of children. The thesis deals with the issues of foster care, professional foster care and also of the transformation of care for children in need. The aim is to describe changes in the foster care that brought the amendment of the Law on the social-legal protection of child and adoption of the new Civil Code. Another aim is to determine the effect of strengthening the professional foster care to the number of children placed in institutional care. In the beginning of the thesis is defined the concept of family, social-legal protection of children, alternative family care and its forms like foster care, professional foster care and adoption. Another part of thesis deals with amendment to the Law on social and legal protection of children and the new Civil Code. In this part I describe the most important changes that the Law on the social-legal protection of children brought and I also describe changes that brought an amendment to the civil code. The adoption of the amendment to the social-legal protection brings a number of changes in the activities of the social-legal protection of children and the exercise of social-legal protection of children in general. The last chapter deals with the statistic of foster care. This part compares the number of children in professional foster care and institutional care.

The earlier theories considered trade credit as a substitute for bank credit. Recent theories suggest that bank credit and trade credit can also be considered as two complementary sources of financing. By using South African panel data from 2007 to 2015, the study examines if the problem of financial inclusion in South Africa can be mitigated by utilising trade credit data. The empirical findings using trade credit at current period are consistent with the earlier theories of trade credit that trade credit and bank credit are substitutes, but the model was not robust to estimation techniques. The study also used the lagged trade credit as a variable of interest and found that it is positively related to bank credit. This means that the trade credit data from the previous period can facilitate access to bank credit. Therefore, the information from trade credit can serve as a signal about firms’ quality and thus facilitates access to bank finance. / Economics / M. Com (Economics)

Les maladies ostéoarticulaires représentent environ 10% de l’ensemble des pathologies identifiées en France chaque année. Ces maladies inflammatoires et dégénératives des articulations sont pour la plupart consécutives au vieillissement ou à un traumatisme et évoluent vers l’usure des cartilages, d’où un handicap sévère. Comme aucun traitement ne permet la réparation totale du tissu cartilagineux, la recherche médicale développe des techniques d’ingénierie tissulaire. Ces techniques utilisent des substrats polymériques et des cellules souches qui sont « contraints » de se développer pour former du tissu cartilagineux. Cependant, ces techniques ne peuvent pas encore être utilisées à l’échelle d’une articulation complète car il n’est pas possible de reproduire ex vivo à grande échelle la structure et les propriétés mécaniques et physicochimiques du cartilage articulaire. Dans ce contexte, les travaux de cette thèse ont permis de développer des matériaux polymères capables d’être implantés à l’échelle macroscopique dans les articulations pathologiques afin de combler l’usure des cartilages. Pour se faire, de nouveaux biomatériaux - hydrogels p(HEMA) - ont été obtenus en contrôlant le caractère hydrophile des hydrogels p(HEMA) au cours de leur synthèse chimique en présence de différents co-monomères (acide acrylique, acrylamide, acrylate d'éthylène et acrylate de butyle). Partant de là, les propriétés physicochimiques, mécaniques et tribologiques de ces nouveaux hydrogels ont été optimisées afin d’obtenir des propriétés similaires à celles du cartilage articulaire sain. Ensuite, la libération contrôlée de médicaments par ces hydrogels a été étudiée afin de minimiser les risques inflammatoires lors de leur utilisation en ingénierie tissulaire du cartilage articulaire. / Osteoarticular diseases re present approximately 10% of all diseases identified in France each year. These inflammatory and degenerative joint disease are mostly consecutive with age or injuries and the wear progress of cartilage, resulting in severe disability. Because no treatment will total repair the cartilage tissue, medical research is developing techniques based on tissue engineering. These techniques use polymer substrates and stem cells that are "forced" to develop into cartilage tissue. However, these techniques cannot be used across a run articulation because Il is not possible-to replicate ex vivo a large-scale structure and the physicochemical and mechanical properties of articular cartilage. In this context, the purpose of this thesis is to develop polymer materials that can be implanted at the macroscopic level in the joints disease that will fill the wear of the cartilage. To do so, new biomaterials - hydrogels p (HEMA)- were obtained by controlling the hydrophilic nature of hydrogels p (HEMA) during their chemical synthesis in the presence of various co-monomers (acrylic acid, acrylamide, acrylate ethylene and butyl acrylate). From there, physicochemical, mechanical and tribological properties of these novel hydrogels have been optimized to obtain similar properties to those of healthy articular cartilage. Then, the controlled release of drugs from these hydrogels was studied to minimize inflammatory when used in tissue engineering of articular cartilage.

This thesis deals with the theme of substitute family care, which is currently topical. The aim of my thesis is to look and bring into the problems of substitute family care in the Czech Republic. The theoretical part is focused on the forms of substitute family care and their characteristics. There is described a mediation of adoption and foster care, where inherently belongs a motivation of applicants. An integral part of substitute family care is also the issue of adoption child from different ethnicity and influence of biological family on upbringing by his substitute parents. There are also explained ethical principles which play an important role in solution of ethical problems and dilemmas in substitute family care.

A experimentação animal é uma prática extremamente incorporada à ciência biomédica moderna, com raízes desde a Antiguidade, mas que foi cada vez mais se desenvolvendo, adquirindo características bem definidas. O animal não humano, no contexto da experimentação, é um ser vulnerado, enclausurado dentro de uma estrutura muito bem definida, que mantém um discurso focado na excelência do modelo do animal na pesquisa e testes, com o objetivo de garantir a manutenção dessas práticas. No entanto, ao analisarmos os dados científicos obtidos com a experimentação animal, que visa primariamente um possível benefício humano, assim como as argumentações éticas relativas ao respeito à vida e ao sofrimento do animal envoltas nesta situação, a argumentação ética prepondera sobre uma base científica cuja eficácia é também extremamente questionável. Partindo de uma análise crítica da aplicação do modelo animal como padrão da pesquisa científica e da concepção ética do reconhecimento da vulnerabilidade do animal não humano na experimentação, propomos que esta reflexão colabore com políticas públicas que incentivem e implementem as técnicas substitutivas ao uso de animais não humanos em pesquisa, testes da indústria e ensino na área biomédica no Brasil. / Animal experimentation is an extremely convenient inserted in modern biomedical science, with roots from antiquity, but it was increasingly developing, acquiring well-defined characteristics. The non-human animal in the context of trials is a hacked being, enclosed within a well defined structure that holds a speech focused on excellence in animal model in research and testing, with the goal of maintaining these practices. However, when analyzing the scientific data obtained from animal experiments, which primarily targets a possible human benefit, as well as the ethical arguments concerning respect for life and the suffering of animals wrapped in this situation, the ethical argument outweighs scientific basis whose effectiveness is also extremely questionable. Based on a critical analysis of the application of animal model as the standard of scientific research and the ethical conception of recognition of the vulnerability of non-human animal experimentation, we propose that this reflection collaborate with public policies that encourage and implement the substitute for use of non-human animals in research, testing and education industry in Brazil biomedical techniques.

A experimentação animal é uma prática extremamente incorporada à ciência biomédica moderna, com raízes desde a Antiguidade, mas que foi cada vez mais se desenvolvendo, adquirindo características bem definidas. O animal não humano, no contexto da experimentação, é um ser vulnerado, enclausurado dentro de uma estrutura muito bem definida, que mantém um discurso focado na excelência do modelo do animal na pesquisa e testes, com o objetivo de garantir a manutenção dessas práticas. No entanto, ao analisarmos os dados científicos obtidos com a experimentação animal, que visa primariamente um possível benefício humano, assim como as argumentações éticas relativas ao respeito à vida e ao sofrimento do animal envoltas nesta situação, a argumentação ética prepondera sobre uma base científica cuja eficácia é também extremamente questionável. Partindo de uma análise crítica da aplicação do modelo animal como padrão da pesquisa científica e da concepção ética do reconhecimento da vulnerabilidade do animal não humano na experimentação, propomos que esta reflexão colabore com políticas públicas que incentivem e implementem as técnicas substitutivas ao uso de animais não humanos em pesquisa, testes da indústria e ensino na área biomédica no Brasil. / Animal experimentation is an extremely convenient inserted in modern biomedical science, with roots from antiquity, but it was increasingly developing, acquiring well-defined characteristics. The non-human animal in the context of trials is a hacked being, enclosed within a well defined structure that holds a speech focused on excellence in animal model in research and testing, with the goal of maintaining these practices. However, when analyzing the scientific data obtained from animal experiments, which primarily targets a possible human benefit, as well as the ethical arguments concerning respect for life and the suffering of animals wrapped in this situation, the ethical argument outweighs scientific basis whose effectiveness is also extremely questionable. Based on a critical analysis of the application of animal model as the standard of scientific research and the ethical conception of recognition of the vulnerability of non-human animal experimentation, we propose that this reflection collaborate with public policies that encourage and implement the substitute for use of non-human animals in research, testing and education industry in Brazil biomedical techniques.

Dans le contexte actuel d’attentats et autres conflits armées, le risque lésionnel thoracique par explosion est exacerbé sans que pour autant l’on sache l’efficacité réelle des moyens actuels de protection thoracique individuelle face à une telle menace. Ce travail de thèse, combinant expérimentations et simulations numériques, a traité de front l’ensemble de la chaine physique entre la détonation d’une charge explosive et l’apparition de lésions pulmonaires. Un des premiers objectifs a été de comprendre les différents phénomènes physiques mis en jeu lors de la propagation de l’onde de choc en champ libre. Le large éventail de données expérimentales acquis a permis de développer des outils simples permettant la détermination des caractéristiques de la menace ainsi qu’une approche numérique robuste sous LS-DYNA. L’objectif suivant a été d’étudier l’interaction d’ondes de choc avec des cibles de géométries simples et de compositions différentes. L’analyse des données expérimentales acquises a permis, en plus de la validation numérique de l’interaction fluide-structure et des MEF des structures, de déterminer de possibles candidats pour la définition d’un critère de lésions thoraciques. Enfin, des essais sur réacteurs biologiques post-mortem ont été réalisés, permettant d’obtenir la réponse cinématique du thorax du modèle porcin sous blast. Tout ceci a permis d’aboutir à des voies d’amélioration et à des outils prometteurs pour permettre l’évaluation et l’évolution des systèmes de protection thoracique dans un futur assez proche afin de limiter les risques face à cette menace qui a gagné en importance ces dernières années. / With the increasing number of bombing attacks and armed conflicts, the risk of thoracic injuries caused by the blast threat is worsen, without knowing the efficiency of the current individual chest protection systems impacted by such a threat. This research, combining experiments and numerical simulations, dealt with the physics at play from the detonation of an explosive charge and the injury outcomes. One of the first objectives was to understand the different physical phenomena involved in the propagation of the shock wave in the open field. The huge set of data acquired allowed the development of simple tools for the determination of the blast characteristics as well as a robust numerical approach under LS-DYNA. The next objective was to study the interaction of shock waves with targets of simple geometries and different compositions. In addition to the numerical validation of the fluid-structure interaction and of the FEM of the structures, the analysis of the experimental data acquired allowed to determine possible candidates for the definition of a thoracic injury criterion. Finally, tests on biological post-mortem reactors have been carried out, which enabled to obtain the kinematic response of the swine’s thorax under blast. All this work has led to improvements and promising tools for the evaluation and the improvement of chest protection systems in the near future. The proposed tools should be used to limit the risks to this threat which has gained in importance in recent years.

Doctor of Philosophy / Department of Economics / Wayne Nafziger / This dissertation constructs three empirical essays. The first essay illustrates the causality on the relationship between output (GDP) growth and exports. By using the Modified Wald (MWald) test we observe unidirectional causality from exports to GDP. More specifically, for the robustness we use a Vector Error Correction Model (VECM) model and the Generalized Impulse Response Function Analysis (GIRA). The VECM and the GIRA yield bidirectional causality between exports and GDP, which weakly supports the unidirectional result of the to MWald test. Meanwhile, we confirm that there is structure break by using the structural break test. These results are plausible and consistent with the expectations of our study for the Export Led Growth Hypothesis (ELGH). However, compared with previous studies on the ELGH for Korea, our results are different. Other studies show a bidirectional causality relationship but this study only has unidirectional causality. These differences may be caused from different observation data, various variables, and use of different econometric methodologies. Also, model selection and omitting variables can also significantly change the results of causality testing. The second essay investigates a degree of competition between Korea's and China's exports in the U.S. market by using the substitute elasticity on a simple demand model. The market share of Korean exports has been decreasing while that of China's has been increasing. The results of this study are as follows. First, we find that Korea has a dominant market share of only goods group code 27 in commodity groups over that of China, otherwise having China's dominant market shares over those of Korea for other export sections by using historical trade data. Second, most estimates of substitute elasticity between both countries' exports in the U.S. market are small (inelastic). However, 61 (apparel articles and accessories, knit or crochet), 62 (apparel articles and accessories, not knit etc) and 85 (electric machinery etc, sound equipments, TV equipment, parts) commodity groups' substitute elasticities are large (elastic) and are competitive in the U.S. market compared with those of China. A small value of the elasticity of substitution may be due to an identification problem for a simple standard model as well as measurement errors in prices as a unit value in this study. So, in order to avoid problems such as these, we may need to use appropriate instrumental or proxy variables in the simple standard model, which highly correlate with the independent (unit price) variables and are uncorrelated with measurement error terms. In practice, it is not easy to find good instrumental variables. The final essay evaluates the roles of price and income as important factors that affect Korea's exports by using the most recent monthly data. By using the Autoregressive Distributed Lag (ARDL) bounds testing approach we find the long-run relationship of variables and estimate the long-run price and income elasticities. However, the estimates of these long-run elasticities are statistically insignificant. This may be due to some misspecifications or measurement errors in our model. Meanwhile, due to the existence of the long-run relationship between variables, we construct the Error Correction Model (ECM) in order to observe the short-run dynamics of the elasticities. Specifically, we add a dummy variable into our export demand model to achieve more efficient estimations since the dummy variable reflects a shock in Korea's export; Korea's economic crisis in 1997. In contrast to the long-run elasticity, we find that the short-run elasticities' estimates are more statistically significant. When we use the structure break test to check the structural stability of Korea's export demand, we find that there is no structural break point of 1997. Therefore, a shock of Korea's economic crisis in 1997 might not significantly affect Korea's export demand in a given sample. However, the Information Technology (IT) bubble of the world economy in 2001 and the entry of Korea into the OECD had triggered an increase in Korea's export demand due to existing structural break points of both events. In addition, we find that income elasticities are larger than price elasticities in the short run. This implies that income has more of an impact than that of price for the export demand model in the short run. This also implies that the change of Korea's exports in the short run is more sensitive to changes in foreign income (industrial production) compared with that of price (exchange rate). An interesting result, thus, is that Korea's exports in the short run may have higher export performance on income than that of price (exchange rate). This might be a consequence of the dependence of an increase in foreign income in recent years. In recent years, developing countries have greatly increased their economic growth compared with that of developed countries and Korea's exports have increased into these developing countries. Thus, we confirm that an increase in Korea's exports is mainly affected by income compared with price, specifically in the short run by using recent data.