Au cours des 10 dernières années, de nombreux évènements en arts visuels se sont penchés sur la question du féminisme, malgré l'annonce de la mort de ce courant politique par plusieurs discours populaires. Effectivement, l'avènement, à la fin de la décennie 1980, des champs d'études queer et postcoloniales reconceptualise et complexifie le sujet du féminisme, la femme. Les fondements de l'identité femme, la fixité de cette catégorie, se voient maintenant interroger. De ce fait, les prémisses misent de l'avant par les féministes des années 1970, moment fort du mouvement de libération des femmes, reçoivent un lot important de critique. Dans un tel contexte, nous souhaitons questionner l'art féministe actuel et comment il se manifeste. Plus spécifiquement, nous voulons analyser de quelle façon il diffère des pratiques féministes inaugurés dans la décennie 1970. C'est sur cette problématique que s'attarde ce mémoire prenant pour corpus d'études les expositions présentées, de 1973 à 1978 et de 2007 à 2010, au centre d'artistes féministes montréalais La Centrale Galerie Powerhouse. Ce lieu de diffusion, fondé par des femmes désirant avoir un endroit pour exposer leur art à un moment où elles étaient exclues des institutions, est un témoin privilégié des relations qu'entretiennent le discours artistique et les théories féministes. La Centrale Powerhouse a d'ailleurs modifié son mandat en 2008 dans le but de demeurer pertinent face aux changements ayant lieu au sein du courant féministe. À travers notre étude comparative de la programmation du centre d'artistes, nous voulons démontrer des démarches politisées, enrichies par de nouvelles préoccupations queer et postcoloniales, demeurent possible ainsi qu'une lecture féministe des œuvres. ______________________________________________________________________________ MOTS-CLÉS DE L’AUTEUR : Art féministe, art contemporain, La Centrale Galerie Powerhouse

A estabilidade do tronco é geralmente desafiada nas sessões do método Pilates. A compreensão da estabilidade/instabilidade, desafiada pela alteração de molas e dependente do nível de treinamento dos executantes, possui grande impacto no controle do tronco. Após uma revisão sistemática foi possível verificar que a principal técnica biomecânica empregada para compreender a estabilidade do tronco é a modelagem. Sendo assim, o objetivo deste estudo foi desenvolver e avaliar um modelo biomecânico para quantificar e comparar a estabilidade do tronco em dois diferentes níveis de praticantes de Pilates e em dois diferentes níveis de intensidade do exercício long stretch front do Pilates. O exercício long stretch front, criado para utilizar o powerhouse e desafiar a estabilidade do tronco, é executado no aparelho reformer na posição de prancha e consiste na extensão de ombros. O movimento foi modelado como um sistema massa-mola sendo a rigidez (K) o parâmetro de estabilidade do tronco. Como dados de entrada foram utilizadas informações cinemáticas, de câmeras infra-vermelho, cinéticas, de células de carga acopladas ao equipamento reformer, e informações antropométricas extraídas da literatura. Foram avaliados 15 praticantes avançados de Pilates e 15 iniciantes. Os indivíduos mais experientes foram mais estáveis durante o exercício do que iniciantes, F(1,28)=7,965; η2=0,22; p=0,009. A execução dos exercícios com duas molas apresentou menor rigidez do que com uma única mola, F(1,28)=67,891; η2=0,71; p<0,001. Não houve interação entre os fatores, F(1,28)=0,587; η2=0,02; p=0,450. Quando os grupos foram comparados separadamente para cada um dos níveis de dificuldade, os mais experientes (K = 272 ± 27 Nm/rad) apresentaram maior rigidez que os iniciantes (K = 171 ± 42 Nm/rad) com uma única mola, e também com o uso de duas molas, com K = 196 ± 17 Nm/rad para os executantes experientes e K = 108 ± 21 Nm/rad para os executantes iniciantes. Conclui-se que o modelo proposto, utilizando o coeficiente de rigidez, foi capaz de quantificar a estabilidade durante o exercício longh stretch front do Pilates. O modelo também identificou as diferenças entre indivíduos mais ou menos experientes, bem como quando o exercício é executado com uma ou com duas molas. / Trunk stability is usually challenged during Pilates method ’sessions. The stability/instability, generated by altering springs or by the practitioner’s experience level during a Pilates exercise, has great impact in trunk control. Following a systematic review, it was observed that modelling is the main biomechanical technique applied for understanding trunk stability. Hence, this study aimed to develop and evaluate a biomechanical model for quantifying and compare trunk stability in two different Pilates practitioners levels and two different intensities of the exercise during Pilates’ long stretch front exercise. The long stretch front exercise, created for using the powerhouse and challenging trunk stability, is performed in the reformer apparatus, keeping the trunk in the plunk position while shoulder extension is performed. The movement was modelled as a spring-mass system using stiffness (K) as the parameter to express trunk stability. Model input consisted of kinematics data, obtained from infrared cameras images, kinetic data, from load cells attached to the reformer equipment, and anthropometric data, obtained from literature. Fifteen experienced and 15 beginner Pilates practitioners, who performed ten repetitions of the exercise in two difficulty levels, with one and two springs, were evaluated. Experienced subjects were more stable during the exercise when compared to beginners F(1.28)=7.965; η2=0.22; p=0.009. The exercise performed using two springs presented a lower rigidity level when compared to one spring F(1.28)=67.891; η2=0.71; p<0.001. There was no interaction between the factors , F(1.28)=0.587; η2=0.02; p=0.450. When groups were compared separately for each difficulty level, experienced (K=272 ± 27 Nm.rad-1) presented higher rigidity than beginners (K=171 ± 42 Nm.rad-1) using one spring, and also using two springs with K=196 ± 17 Nm.rad-1 for experienced performers and K=108 ± 21 Nm.rad-1 for beginners. Concludes that the proposed model is capable of quantifying stability during the Pilates long stretch front exercise using rigidity coefficient. In addition model identifies differences between more or less experienced subjects, as well as when the exercise is performed using one or two springs.

University of Technology, Sydney. Faculty of Design, Architecture & Building. / The thesis explores the notions of immersive experience in museum exhibitions, and examines whether the communication of the exhibition content can be transmitted more effectively to visitors through the creation of an immersive environment. The study reviews the origins and changing interpretations of the term 'immersive experience', and draws upon the work of researchers including Heim (1998) and Bitgood (1990) to examine immersive experience in the context of museum exhibitions. The role of narrative in enhancing immersive experience in exhibitions is explored through the work of researchers including Hooper-Greenhill (2000) and the ideas of Joseph Campbell on myth, story telling, and the concept of 'hero'. Theories of effective communication and learning in the museum context are examined, as well as formal strategies that can be undertaken by museums to inform and facilitate communication and learning for the experience of the visitor. The author employs the methodology of 'participant observation', using her experience as Senior Designer at the Powerhouse Museum in Sydney to reflect on the aspects of multi-sensory stimulation required for the communication process in an exhibition, and on what is achieved by the implementation of new technology into museum exhibition spaces. A number of exhibitions designed at the Powerhouse Museum by the author are used as case studies. The major outcome of the study is a theoretical framework on immersive experience that may be applied by museum designers and curators to enhance communication experience for visitors to exhibitions, or may be used by educators to enhance learning experiences for groups who use museums as learning environments. The thesis concludes with some ideas for further research in the area of immersive experience in the museum, including the development of a methodology for evaluating the effectiveness of immersive experiences created by museum designers.

O Método Pilates parte do princípio da centralização, no qual todo movimento começa e é sustentado no centro do corpo, chamado de centro de força, ou, ainda, de powerhouse. Com a finalidade de ajudar o praticante do método a localizar o powerhouse, aumentar o controle e o recrutamento dos músculos que o compõem, Joseph Pilates criou o acessório Magic Circle, o qual consiste num aro flexível com aproximadamente 40 cm de diâmetro, utilizado, entre outras finalidades, para aumentar a atividade dos músculos abdominais em alguns exercícios do Método Pilates. O objetivo deste trabalho foi comparar a atividade eletromiográfica abdominal, bem como analisar a pressão intravaginal, nos exercícios The Hundred e The Hundred modificado, executados com e sem o acessório Magic Circle. Foram analisados, simultaneamente, o sinal eletromiográfico de superfície dos músculos reto abdominal, oblíquo externo, oblíquo interno e adutor longo, e a pressão intravaginal durante a execução dos exercícios The Hundred e The Hundred modificado com e sem a utilização do Magic Circle. Verificou-se uma maior atividade nos músculos abdominais apenas quando o Magic Circle foi utilizado em situações de instabilidade, enquanto a pressão intravaginal não foi afetada pelo uso do acessório. O Magic Circle pode ser recomendado para uma maior ativação da musculatura abdominal nas situações de maior instabilidade mecânica e não é recomendado quando se busca uma maior pressão intravaginal. / The Pilates method is based on the centering principle, in which every movement starts and is supported by the center of the body, called strong core or powerhouse. In order to help the practitioner locate the powerhouse and increase the control and recruitment of its muscles, Joseph Pilates created the accessory Magic Circle, which consists of a flexible ring, approximately 40cm wide, used, among other purposes, to increase abdominal muscle activity in some exercises of the Pilates Method. The aim of this study was to compare the abdominal electromiographic activity, as well as to analyze intra-vaginal pressure in the exercises The Hundred and The Hundred modified, performed with and without the accessory Magic Circle. The study simultaneously analyzed the electomiographic signal on the surface of the rectus abdominis, external oblique, internal oblique, aductor longus, as well as intra-vaginal pressure during the performance of the exercises The Hundred and The Hundred modified with and without the use of the Magic Circle. There was higher activity on the abdominal muscles only when the Magic Circle was used in instability situations, while the intra-vaginal pressure was not affected by the use of the accessory. The Magic Circle can be recommended for higher activation of the abdominal muscles in mechanical instability situations and is not recommended when pursuing higher intravaginal pressure.

O Método Pilates parte do princípio da centralização, no qual todo movimento começa e é sustentado no centro do corpo, chamado de centro de força, ou, ainda, de powerhouse. Com a finalidade de ajudar o praticante do método a localizar o powerhouse, aumentar o controle e o recrutamento dos músculos que o compõem, Joseph Pilates criou o acessório Magic Circle, o qual consiste num aro flexível com aproximadamente 40 cm de diâmetro, utilizado, entre outras finalidades, para aumentar a atividade dos músculos abdominais em alguns exercícios do Método Pilates. O objetivo deste trabalho foi comparar a atividade eletromiográfica abdominal, bem como analisar a pressão intravaginal, nos exercícios The Hundred e The Hundred modificado, executados com e sem o acessório Magic Circle. Foram analisados, simultaneamente, o sinal eletromiográfico de superfície dos músculos reto abdominal, oblíquo externo, oblíquo interno e adutor longo, e a pressão intravaginal durante a execução dos exercícios The Hundred e The Hundred modificado com e sem a utilização do Magic Circle. Verificou-se uma maior atividade nos músculos abdominais apenas quando o Magic Circle foi utilizado em situações de instabilidade, enquanto a pressão intravaginal não foi afetada pelo uso do acessório. O Magic Circle pode ser recomendado para uma maior ativação da musculatura abdominal nas situações de maior instabilidade mecânica e não é recomendado quando se busca uma maior pressão intravaginal. / The Pilates method is based on the centering principle, in which every movement starts and is supported by the center of the body, called strong core or powerhouse. In order to help the practitioner locate the powerhouse and increase the control and recruitment of its muscles, Joseph Pilates created the accessory Magic Circle, which consists of a flexible ring, approximately 40cm wide, used, among other purposes, to increase abdominal muscle activity in some exercises of the Pilates Method. The aim of this study was to compare the abdominal electromiographic activity, as well as to analyze intra-vaginal pressure in the exercises The Hundred and The Hundred modified, performed with and without the accessory Magic Circle. The study simultaneously analyzed the electomiographic signal on the surface of the rectus abdominis, external oblique, internal oblique, aductor longus, as well as intra-vaginal pressure during the performance of the exercises The Hundred and The Hundred modified with and without the use of the Magic Circle. There was higher activity on the abdominal muscles only when the Magic Circle was used in instability situations, while the intra-vaginal pressure was not affected by the use of the accessory. The Magic Circle can be recommended for higher activation of the abdominal muscles in mechanical instability situations and is not recommended when pursuing higher intravaginal pressure.

O Método Pilates parte do princípio da centralização, no qual todo movimento começa e é sustentado no centro do corpo, chamado de centro de força, ou, ainda, de powerhouse. Com a finalidade de ajudar o praticante do método a localizar o powerhouse, aumentar o controle e o recrutamento dos músculos que o compõem, Joseph Pilates criou o acessório Magic Circle, o qual consiste num aro flexível com aproximadamente 40 cm de diâmetro, utilizado, entre outras finalidades, para aumentar a atividade dos músculos abdominais em alguns exercícios do Método Pilates. O objetivo deste trabalho foi comparar a atividade eletromiográfica abdominal, bem como analisar a pressão intravaginal, nos exercícios The Hundred e The Hundred modificado, executados com e sem o acessório Magic Circle. Foram analisados, simultaneamente, o sinal eletromiográfico de superfície dos músculos reto abdominal, oblíquo externo, oblíquo interno e adutor longo, e a pressão intravaginal durante a execução dos exercícios The Hundred e The Hundred modificado com e sem a utilização do Magic Circle. Verificou-se uma maior atividade nos músculos abdominais apenas quando o Magic Circle foi utilizado em situações de instabilidade, enquanto a pressão intravaginal não foi afetada pelo uso do acessório. O Magic Circle pode ser recomendado para uma maior ativação da musculatura abdominal nas situações de maior instabilidade mecânica e não é recomendado quando se busca uma maior pressão intravaginal. / The Pilates method is based on the centering principle, in which every movement starts and is supported by the center of the body, called strong core or powerhouse. In order to help the practitioner locate the powerhouse and increase the control and recruitment of its muscles, Joseph Pilates created the accessory Magic Circle, which consists of a flexible ring, approximately 40cm wide, used, among other purposes, to increase abdominal muscle activity in some exercises of the Pilates Method. The aim of this study was to compare the abdominal electromiographic activity, as well as to analyze intra-vaginal pressure in the exercises The Hundred and The Hundred modified, performed with and without the accessory Magic Circle. The study simultaneously analyzed the electomiographic signal on the surface of the rectus abdominis, external oblique, internal oblique, aductor longus, as well as intra-vaginal pressure during the performance of the exercises The Hundred and The Hundred modified with and without the use of the Magic Circle. There was higher activity on the abdominal muscles only when the Magic Circle was used in instability situations, while the intra-vaginal pressure was not affected by the use of the accessory. The Magic Circle can be recommended for higher activation of the abdominal muscles in mechanical instability situations and is not recommended when pursuing higher intravaginal pressure.

Indiana University-Purdue University Indianapolis (IUPUI) / Introduction: Increasing obesity in children leads to an increase in the risk of Type 2 diabetes (T2D). Therefore, it is important to promote healthier lifestyles in youths and encourage their caregivers(s) to provide a healthy lifestyle environment. The PowerHouse program focuses on improving food choices, increasing physical activity, and adopting behavior changes for the reduction of obesity and the prevention of T2D. Method: The aim of this study was to assess the effects of implementing the PowerHouse program on both clinical and quality of life outcomes in high-risk, low-income youth and their caregivers. Primary outcomes were BMI standard deviation and BMI percentile in youths. Secondary outcomes included physical activity of youths and quality of life for both youths and their caregivers. Attendance rates were also calculated. Linear effect mixed models were used to test for time effects for all outcomes. Results: Clinical outcomes did not improve over time, except for youth HbA1c (p-value = 0.0447). Some improvements in youth quality-of-life outcomes were noted: specifically, the Sports Index score of the Fels Physical Activity Questionnaire for Children (adjusted p-value = 0.0213) and the Physical Summary (p-value = 0.0407), Psychosocial Summary (p-value = 0.0167), and Total score (p-value = 0.0094) for the youth-reported Pediatric Quality of Life Inventory. Quality of life did not change over time for caregivers. For attendance, there was an improvement after the intervention was modified to improve access to fresh produce (p-value = 0.0002). Conclusion: HbA1c and quality of life improved over time for youth; however, there was not an improvement in caregiver outcomes over time. The data suggest that more time may be needed to see the full effects of the intervention, and/or that a booster intervention may be needed.

[pt] Considerando a importância estratégica dos sistemas de geração de energia hidrelétrica na matriz energética do Brasil, o objetivo desta dissertação é propor e aplicar um modelo de avaliação do ciclo de vida (ACV) espaço-temporal desses sistemas. A metodologia compreende: (i) pesquisa bibliográfica e documental sobre os temas centrais da pesquisa; (ii) desenvolvimento do modelo conceitual de avaliação do ciclo de vida espaço-temporal de sistemas hidrelétricos de geração de energia; (iii) estudo empírico referente à aplicação do modelo proposto na Usina Hidrelétrica Sinop, localizada no estado do Mato Grosso, Brasil. O principal resultado é um modelo de ACV espaço-temporal, validado empiricamente por sua aplicação na referida usina hidrelétrica. Ao integrar parâmetros temporais e espaciais em um novo framework de ACV para sistemas de geração de energia hidrelétrica no Brasil, a aplicação do modelo proposto fornece uma avaliação mais completa e precisa dos impactos ambientais desses sistemas, contribuindo assim para o desenvolvimento de políticas e estratégias mais sustentáveis no setor energético brasileiro. Poderá auxiliar nos processos de tomada de decisão relacionados a novos empreendimentos de geração de energia hidrelétrica, incluindo a definição de metas para minimizar danos ambientais e à saúde humana durante a implantação e operação desses empreendimentos. Ao fornecer novas informações de inventário do ciclo de vida de sistemas de energia hidrelétrica, esta dissertação também contribuirá para o Banco Nacional de Inventários do Ciclo de Vida (SICV Brasil). / [en] Considering the strategic importance of hydroelectric power generation systems in Brazil s energy matrix, the objective of this dissertation is to propose and apply a space-time life cycle assessment (LCA) model for these systems. The methodology comprises (i) bibliographic and documentary research on the central themes of the research, (ii) development of a conceptual model for the spatiotemporal LCA of hydroelectric power generation systems, and (iii) an empirical study focusing on the application of the proposed model in the Sinop Hydroelectric Power Plant, located in the state of Mato Grosso, Brazil. The main result is a spatial-temporal LCA model that was empirically validated by its application in the referred hydroelectric power plant. By integrating temporal and spatial parameters into a new LCA framework for hydroelectric power generation systems in Brazil, the proposed model provides a more comprehensive and accurate assessment of the environmental impacts of these systems, thus contributing to the development of more sustainable policies and strategies in the Brazilian energy sector. This may assist in decision-making processes related to new hydroelectric power generation projects, including the definition of goals to minimize environmental and human health damage during the implementation and operation of these projects. By providing new life cycle inventory information for hydroelectric power systems, this dissertation will also contribute to the National Life Cycle Inventory Database (SICV Brazil).