Thesis (Ed.D.)--Teachers College, Columbia University, 1996. / Typescript; issued also on microfilm. Sponsor: Frank L. Smith. Dissertation Committee: Jeanette E. Fleischer. Includes bibliographical references (leaves 128-130).

Anthropological film and videomakers use their media for both research and education. In both cases, a formal technique of observational camerawork is required. In this thesis, appropriate continuity methods and a model of decision-making in camerawork are proposed, which are designed to deal with the certainties and uncertainties encountered in the observational type of ethnographic film. The ethnographic context of the research is the community in the Shixini area of the Transkei, where the author made video-recordings of a number of ritual and everyday events between 1981 and 1984. The model is tested on the case study of a "small event". There is an extensive amount of video material of a four-day mortuary ritual. The model is examined through a first-person account of the influences on decisions during shooting, and through formal analysis. Both of these examinations refer in detail to the unedited video material which accompanies the thesis, and assess how the decisions deal with time and space: with regard to the ritual markers and the continuity method. The thesis concludes that the model of camera work can be used to provide a coherent observation of the small event. The suitability of the model for editing is then tested. The unedited material of the case study is compared with an edited version. The ritual is represented in a narrative segment within a longer documentary, "Shixini December: Responses to Poverty in the Transkei". The complexity of editing operations is examined in detail by a variety of methods, and refers closely to the longer documentary. The fit between continuity in the unedited camera work and the edited version is established. A video copy of this documentary also accompanies the thesis. The unedited observational material is then tested for its use in research. An anthropologist screened the unedited material to ritual participants to elicit their responses, and with the results wrote a dissertation combining interpretation and ethnography. The detail of the ethnography and the consistency of the interpretation demonstrates the value of an observational video record. It does not conclusively demonstrate its validity for research, because the effect of video on memory needs further exploration. Instead of stimulating memory of off-camera action as may be expected, the video seems to anaesthetise it. Continuity methods can provide a clear but partial and fragmented observational record. This record has formal characteristics which are a necessary but not sufficient condition for editing into narrative. Continuity methods may provide a video record that is useful for research. If the video is used for reflexive validation, then a possible effect on the memory of off-camera events must be taken into account. The continuity characteristics of unedited video which result from in-camera editing can, but need not be, evident in subsequent texts based on them.

With the rapid increase in electrical loads, a considerable percentage of global power systems have been stretched to their designed capacity, leading to a sharp rise in the fault current. High fault current levels have severe impact on power systems. They can increase the likelihood of overcurrent damage, which may destroy electrical facilities or even cause system blackout. The resistive-type superconducting fault current limiter (RSFCL) is a device that can help to mitigate the increasing level of fault currents. It can also contribute to the performance, stability and efficiency of electricity grids. In order to promote the RSFCL more effectively, it is essential to study the device itself and conduct simulations regarding the performance and applicability from the system point of view. Chapter 1 and Chapter 2 of this thesis introduced fundamentals of superconductivity and RSFCLs, respectively. In Chapter 3, a power system model was built, and the transient analysis of short-circuit currents was given. Then, the operating principle of RSFCL was explained, and a step-resistance RSFCL model was introduced. To validate the current limiting performance of the SFCL module, wind farm protection schemes were studied under various fault scenarios. After thorough analysis it was concluded that the optimal allocating strategy of SFCLs was the installation of one SFCL at the integrating point of the system model. Chapter 4 presented a comprehensive study on the performance and optimal allocation strategy of RSFCLs. The two power system models used in this chapter were built based on the UK network standard. To assess the impact of incorporating SC material properties on the performance of SFCLs, three different models were compared throughout the study. Although computing time can be reduced when step-resistance and exponential equation models were used, such simplifications led to strong overestimations of the SFCL performance and resulted in wrong conclusion of optimal installing strategies. For both power system models, the simultaneous use of three SFCLs was the best protection strategy in terms of the performance, economic efficiency and reliability of the overall grids. To draw this conclusion, all the potential combinations of two, three, four, and five SFCLs were studied under a wide number of fault scenarios and measuring strategies. In Chapter 5, a series of experiments were performed to study the magnetic field-angular dependence of the critical current of different commercial YBCO samples. We selected ten 2G-HTS tapes with broad differences in width, fabrication process, and laminar structure. The obtained I_c (B,θ) characteristics of HTS samples were applied in the simulation of RSFCLs, showing unneglectable effect on the first peak limiting performance during faults. This study is helpful to the design and simulation of RSFCLs and other HTS applications which require superconducting wires operating inside magnetic fields. In Chapter 6, we presented a High Frequency (HF) AC-assisted quench study of the YBCO conductor. The differences in quench processes triggered by HF AC field were recorded and studied. We found that AC signals of 10 kHz can trigger quench of the HTS tape. Also, the device proved to be effective at guaranteeing uniform quench of the sample. After then, we placed the experimental device in a magnet, to study whether the quench process can be accelerated by external DC magnetic field. It was found that the DC field can reduce the quench time, but its performance was dependent on the amplitude of transport current and the characteristics of HF AC signals. In addition, the angle between the DC magnetic field and the tape surface showed a huge impact on the quench time. Finally, a comprehensive field-angular dependence study about the quench time of the YBCO sample was conducted, revealing the same pattern as J_c (θ,B) dependence of the tape, but with a greater anisotropy. To summarize, this technique showed outstanding performance regarding quench acceleration and tape protection, and therefore has huge potential to be applied in RSFCLs.

Acompanha: Uso de filmes de entretenimento no ensino de ecologia / Este trabalho apresenta a utilização de trechos de filmes de entretenimento, como recurso para discussão dos conteúdos de maneira que estimulasse os alunos na aprendizagem de Biomas Brasileiros e Mundiais. Buscou se a compreensão acerca do processo de aprendizagem dos conceitos científicos pelos alunos, a partir da aplicação de duas Sequências Didáticas, elaboradas como produto educacional, sustentadas pela Teoria da Aprendizagem Significativa de Ausubel e nas reflexões de Moreira (2010). Como metodologia, a abordagem foi qualitativa, utilizando o método fenomenológico. Os dados foram obtidos por meio da aplicação de um questionário para obtenção dos conhecimentos prévios e da confecção de Mapas Conceituais pelos alunos, a partir da aplicação da atividade. Após a elaboração dos Mapas, os alunos explicaram oralmente sua produção a fim de se compreender as relações e hierarquizações que eles fizeram acerca do conteúdo. Por meio dessa pesquisa, foi possível demonstrar que a utilização de vídeos de entretenimento no ensino colabora para a aprendizagem de conceitos, quando utilizadas de maneira estruturada e planejada, tendo o professor como mediador de debates, promovendo as relações entre o objeto apresentado e o conhecimento científico. Sendo assim, pode- se afirmar que, ao incorporar trechos de filmes de entretenimento no ensino, é possível promover a aprendizagem significativa de conceitos e não somente a motivação dos alunos. / This paper presents the use of entertainment film clips as a resource for discussion of the contents so as to stimulate students in learning Brazilian Biomes and World. Sought to understanding the learning process of scientific concepts by students from the application of two Teaching Units, designed as an educational product, supported by the Meaningful Learning Theory of Ausubel and the reflections Moreira (2010). As methodology, the qualitative approach using the phenomenological method. Data were obtained through the application of a questionnaire to obtain the prior knowledge and making concept maps by students from the application of the activity. After the preparation of maps, students orally explained their production in order to understand the relationships and hierarchies they did about the content. Through this research, it was possible to demonstrate that the use of entertainment videos in education contributes to learning concepts when used in a structured and planned way, with the teacher as facilitator of debates, promoting relations between the presented object and knowledge scientific. Thus, it can be said that by incorporating entertainment film clips in teaching can promote meaningful learning of concepts and not only the motivation of students.

Acompanha: Uso de filmes de entretenimento no ensino de ecologia / Este trabalho apresenta a utilização de trechos de filmes de entretenimento, como recurso para discussão dos conteúdos de maneira que estimulasse os alunos na aprendizagem de Biomas Brasileiros e Mundiais. Buscou se a compreensão acerca do processo de aprendizagem dos conceitos científicos pelos alunos, a partir da aplicação de duas Sequências Didáticas, elaboradas como produto educacional, sustentadas pela Teoria da Aprendizagem Significativa de Ausubel e nas reflexões de Moreira (2010). Como metodologia, a abordagem foi qualitativa, utilizando o método fenomenológico. Os dados foram obtidos por meio da aplicação de um questionário para obtenção dos conhecimentos prévios e da confecção de Mapas Conceituais pelos alunos, a partir da aplicação da atividade. Após a elaboração dos Mapas, os alunos explicaram oralmente sua produção a fim de se compreender as relações e hierarquizações que eles fizeram acerca do conteúdo. Por meio dessa pesquisa, foi possível demonstrar que a utilização de vídeos de entretenimento no ensino colabora para a aprendizagem de conceitos, quando utilizadas de maneira estruturada e planejada, tendo o professor como mediador de debates, promovendo as relações entre o objeto apresentado e o conhecimento científico. Sendo assim, pode- se afirmar que, ao incorporar trechos de filmes de entretenimento no ensino, é possível promover a aprendizagem significativa de conceitos e não somente a motivação dos alunos. / This paper presents the use of entertainment film clips as a resource for discussion of the contents so as to stimulate students in learning Brazilian Biomes and World. Sought to understanding the learning process of scientific concepts by students from the application of two Teaching Units, designed as an educational product, supported by the Meaningful Learning Theory of Ausubel and the reflections Moreira (2010). As methodology, the qualitative approach using the phenomenological method. Data were obtained through the application of a questionnaire to obtain the prior knowledge and making concept maps by students from the application of the activity. After the preparation of maps, students orally explained their production in order to understand the relationships and hierarchies they did about the content. Through this research, it was possible to demonstrate that the use of entertainment videos in education contributes to learning concepts when used in a structured and planned way, with the teacher as facilitator of debates, promoting relations between the presented object and knowledge scientific. Thus, it can be said that by incorporating entertainment film clips in teaching can promote meaningful learning of concepts and not only the motivation of students.

Made available in DSpace on 2014-08-20T13:20:47Z (GMT). No. of bitstreams: 1 Vanessa_Patzzlaff_Bosenbecker_Dissertacao.pdf: 8988662 bytes, checksum: 6c8954da15c81f6c9b109c404fd91618 (MD5) Previous issue date: 2012-02-27 / The study approaches the architecture produced by the Pomeranian immigrants in Osório and PyCrespo colonies, in Cerrito Alegre, Third District of Pelotas, Rio Grande do Sul. They are the third generation of Pomeranians in Brazil. The studied sites belong to the founders group of Palmeira community, a free Lutheran religious association of that locality. The main objective of this research is to identify the continuities and changes in t he construction mode and functions organization in their properties. To reach the objective, sites and residences functions organization characteristics, as well as the construction techniques used by the analyzed group, were compared with the data brought by the historiography concerned with the architecture produced by the Pomeranians in their homeland and by the Pomeranian immigrants in Rio Grande do Sul, as well as with some other architectures produced by immigrants of other ethnicities. Thus, the obtained data in the sites survey were related to the specialized reference literature (WEIMER, 2005; BERTUSSI, 1987 and; MACEDO, 1987), in order to identify continuities, adjustments and ruptures in the architecture produced by the Pomeranian immigrants grandsons / Este estudo aborda a arquitetura produzida pelos descendentes de imigrantes pomeranos nas Colônias Osório e Py Crespo, no Cerrito Alegre, Terceiro Distrito de Pelotas, Rio Grande do Sul. Os sítios estudados pertencem ao grupo de fundadores da Comunidade Palmeira, associação religiosa luterana livre daquela localidade. A pesquisa tem como objetivo principal identificar as permanências e as adaptações no modo de construir e organizar as funções nas propriedades destas pessoas que compõem a terceira geração dos pomeranos em solo brasileiro. Para atingir o objetivo, as características na organização das funções nos sítios e nas residências, bem como as técnicas construtivas utilizadas pelo grupo analisado, foram colocadas em diálogo com os dados trazidos pela historiografia referente à arquitetura produzida pelos pomeranos em sua terra natal e pelos imigrantes pomeranos em solo sul-riograndense, assim como a algumas das outras arquiteturas produzidas por imigrantes de outras etnias. Desta maneira, os dados obtidos nos levantamentos dos sítios foram relacionados à literatura especializada de referência (WEIMER, 2005; BERTUSSI, 1987 e; MACEDO, 1987), e identificaram-se permanências, adaptações e rupturas na arquitetura produzida pelos netos de imigrantes pomeranos

Um filme polimérico utilizado na fabricação de curativos adesivos não perfurados deve ter baixo módulo de elasticidade e boa permeabilidade ao vapor d\' água. O baixo módulo de elasticidade garante sensação de maior conforto do produto em contato com a pele quando a pessoa que o está utilizando movimenta a parte do corpo sobre a qual está aplicado o curativo, principalmente a região das articulações, como joelhos e cotovelos. A importância de uma boa permeabilidade ao vapor d\' água está relacionada, principalmente em curativos não perfurados, ao fato de que a pele perde água constantemente e, se o filme polimérico não permitir a saída dessa água ao meio ambiente, ocorrerá um fenômeno denominado maceração, que é a sensibilização excessiva da pele, causada pela hiper hidratação da mesma. O presente trabalho apresenta um estudo da permeabilidade ao vapor d\' água, bem como a caracterização vibracional e térmica de um filme polimérico constituído por três polímeros diferentes, desenvolvido para substituir a poliuretana utilizada atualmente na produção de curativos adesivos não perfurados, com custo inferior. Os polímeros que constituem o filme foram caracterizados separadamente e alguns resultados obtidos, como Tm e a estrutura química dos polímeros Lotader® e Lotryl® foram comparados aos dados fornecidos pelo fabricante. Verificou-se que as propriedades de módulo de elasticidade e permeabilidade ao vapor d\' água do filme desenvolvido são inferiores às da poliuretana inviabilizando a substituição. Entretanto, o trabalho proporcionou um melhor entendimento dos fatores que influenciam o módulo de elasticidade e a permeabilidade do novo material ao vapor d\' água. / A polymeric film must have low elasticity modulus and good water vapor permeation to be used in the production of non perforated adhesive tapes. Low modulus is desirable to provide comfort sensation as the consumer moves the part of his or her body in which the tape is applied on, mainly in the articulations regions, as elbows and knees. The importance of good water vapor permeation is related, mainly in the case of non perforated adhesive tapes with the continuous loss of water by the skin. If the film does not allow the release of the water continuously lost by the skin to the environment, the skin will become very sensitiveness as a result of over hydration. This work presents a study of water permeability and a thermal and vibrational characterization of a polymeric film composed of three different polymers developed to replace the adhesive not perforated polyurethane tape providing lower cost. Besides characterization a test of Water Vapor Transmission Rate (WVTR) was performed. Each polymer present in the film composition was analyzed and the results as Tm and chemical structure of Lotader® e Lotryl® were compared with the producer data. It was verified that the properties of elasticity modulus and water vapor permeability of the new material developed are worse than polyurethane so the substitution can not be performed. However, the work provided a better understanding of the factors that influences the elasticity modulus and water vapor permeability of the new material.

M.Ed. (Media Studies) / Please refer to full text to view abstract

This dissertation reports on a multiple-case study documenting the experiences of 23 French as second language learners, most of whom were pre-service teachers, as they worked independently to improve their existing oral/aural competency through the use of the interactive videodisc program À la rencontre de Philippe. The program claims to invite learners into the fictive Parisian world of a young freelance journalist, providing them with the opportunity for immersion in the target language and culture as well as a degree of control over their learning. The study explores learners' experiences as they work with this program, investigates the impact this experience might have on their second language acquisition and reflects on the implications this information might have for second language pedagogy and research. Participants were asked to write a reflective personal language learning history and keep a journal documenting each work session. These work sessions were videotaped. The data collected served as a basis for interviews exploring the participants' interaction with the microworld presented by the program, the program's technological features, learner autonomy, and the learning process and outcomes as perceived by the learners. The experiences of the learners indicate that instead of using technology to bring the second language and culture to learners in the classroom, it is now both possible and desirable to use technology to "transport" learners from the classroom into the second language environment. In other words, participants reported having the experience of subjective personal presence in the microworld. Furthermore, their overall experience suggested that language learning is both an embodied and a situated endeavour, as well as a cognitive one. Therefore, computer technology can enhance second language acquisition by providing learners the opportunity to be immersed in sociolinguistically-rich, simulated communities in which they can engage in everyday activities and interact with target language speakers. / Education, Faculty of / Language and Literacy Education (LLED), Department of / A la rencontre de Philippe (Videodisc) / Graduate

Parent-child interactions help set the foundation for a child's development. It is therefore important to investigate the relative efficiency and efficacy of procedures used to train them. One procedure that researchers continue to explore is video modeling. The current study evaluated the effect of a video model that displayed favorable parent-child interactions and a modified model with embedded instructions to determine if the introduction of either of these models would alter parent-child interactions. Both models were presented alone without supplemental guidance. Three families were involved in the study. The results showed no systematic change across families or conditions as a result of video viewing and are discussed within context of the needs of the parent, adequate stimulus control, community to support behavior change, measurement sensitivity, and influence of methodology. This study provided a great baseline for future studies to explore the necessary components to create an effective video model.