Made available in DSpace on 2016-06-02T20:16:51Z (GMT). No. of bitstreams: 1 5122.pdf: 4836185 bytes, checksum: e68b829c8c97de590e305d990e8a1452 (MD5) Previous issue date: 2012-04-13 / Secretaria da Educação do Estado de São Paulo / This paper describes the development of experimental activities with the aid of the microcomputer as a measuring tool in the laboratory teaching of physics, as well as an account of his experience in the classroom. Using the software Audacity activities were carried out involving acoustic wave phenomena and as an aid for the development of a significant learning in high school. As theoretical references were used sociointeractionist theories of Vygotsky and Ausubel's meaningful learning. The instructional material was applied to two groups of high school students: a State School Marechal Rondon - Guara / SP and other College Evolution - Guara / SP. The learning experience is described in this paper and the product was produced education tours for student experiments. / O presente trabalho descreve o desenvolvimento de atividades experimentais com auxílio do microcomputador como instrumento de medida no laboratório didático de Física, bem como um relato desta experiência em sala de aula. Com auxílio do software Audacity foram desenvolvidas atividades envolvendo fenômenos ondulatórios e a acústica como meio auxiliar para o desenvolvimento de uma aprendizagem de forma significativa no ensino médio. Como referenciais teóricos foram utilizadas as teorias sociointeracionista de Vygotsky e a da aprendizagem significativa de Ausubel. O material instrucional foi aplicado a duas turmas de alunos de ensino médio: uma da Escola Estadual Marechal Rondon Guará/SP e outra do Colégio Evolução Guará/SP. A experiência didática é descrita neste trabalho e como produto educacional foram produzidos roteiros de experimentos para o aluno.

The thesis treats automatic extraction of semantic data from Web pages. Within this broad problem, it focuses on finding values of data figures within the page presenting certain entity (e.g. price of a laptop). The main idea we wanted to evaluate is that a figure can be found using its context in the page: the words that surround it and values of the attributes of the containing HTML tags, class attribute in particular. Our research revealed there are two types of contemporary solutions of this problem: either the author of the Web page must inline semantic information inside the markup of the page or there are commercial tools that can be trained to parse a particular page format (targetting pages from a single Web domain). We examined the possibilities of developing a general solution that would - for given entity - find its properties across the Web domains using text analysis and machine learning. The naïve algorithm had about 30% accuracy, the lear- ning algorithms had the accuracy between 40 and 50% in finding the properties. Despite the accuracy is not acceptable for a final solution, we believe it confirms the potential of the idea. Keywords: Web pages data extraction 1

This thesis deals with an experimental determination of heat transfer coefficients from the surface of the thermal manikin. The main focus of the work lies on separating radiative and convective heat fluxes from the surface of the thermal manikin. Both nude and clothed, standing and seated postures were investigated respectively. The tests were conducted in a constant air temperature (cca 24°C) and a constant wind speed (cca 0,05 m.s-1) environment. The major part of the radiative heat flux was eliminated by a low emissivity coating applied to the surface of the nude thermal manikin, and in the case of clothed manikin by a low emissivity two-piece dress. Favorable results were achieved only in the case of the nude manikin measurements. The measurements were performed across 34 zones that logically represent parts of a human body. Experimental work confirms theoretical expectations in the means of a heat transfer. In addition, the results of this work were compared to results of a similar experimental work. The outcomes of this thesis provide essential information in order to create detailed computational models of a thermal environment. Such models require anatomically specific, separate values of convective and radiative heat transfer coefficients.

Propõe-se o estudo do separador gravitacional de fundo de poço do tipo shroud invertido para poços direcionais e horizontais. A geometria inovadora é observada pela inclinação imposta, solução que transforma um escoamento vertical descendente, veloz e caótico, num escoamento inclinado e segregado em canal livre. Com a inclinação, minimizasse a incorporação de gás, no impacto do escoamento em superfície livre contra a interface de líquido formada pelo nível do anular interno (NAI), e a segregação é incrementada devido ao gradiente de velocidades e ao aparecimento da componente da gravidade na direção radial do poço de petróleo. O trabalho experimental tem como uma de suas metas o levantamento da eficiência de separação em função das vazões de líquido e gás, do ângulo de inclinação e o grau de interferência do escoamento no duto anular formado entre o separador e a parede do poço de petróleo, chamado neste trabalho de anular externo. Foi feito um trabalho de semelhança dimensional e foram detectados os números adimensionais pertinentes ao problema. Constatou-se que a vazão de gás e o escoamento no anular externo não interferem na eficiência de separação. Além disso, foi realizado um trabalho de caracterização dos padrões do escoamento gás-líquido em duto anular, através de visualização e análise no domínio do tempo e da frequência do sinal dinâmico da queda de pressão. Também são propostos dois modelos matemáticos, um modelo fenomenológico baseado em princípios físicos fundamentais, que foi capaz de prever com eficácia a região de máxima eficiência do separador shroud invertido, e um modelo numérico, que reproduziu a fenomenologia do processo de separação do gás. / This research project proposes the study of the inverted-shroud gravitational gas separator for directional and horizontal wells. The innovative geometry is observed by the inclination that transforms a vertical, fast and chaotic downward flow into an inclined and segregated free channel flow. Due to inclination, the incorporation of gas at the internal gasliquid interface (NAI) is minimized; the segregation is increased due to the velocity gradient and the gravitational term that arises in the radial direction of the oil well. One of the aims of the experimental work is the obtaining of new data of gas separation efficiency as a function of the flow of liquid and gas, inclination angle and the evaluation of the degree of interference of the external annular duct flow. A dimensional analysis was undertaken to identify the relevant dimensionless numbers. It was found that the gas flow and the flow pattern in the external annular duct do not interfere in the separation efficiency. A flow pattern characterization was carried out through visualization and time and frequency domain analysis of differential pressure signature signal. Two mathematical models are proposed, a phenomenological model based on fundamental physical principles, which was able to predict with good accuracy the region of maximum separation efficiency, and a numerical model, which reproduced the phenomenology of the gas separation process.

<p>Biochemistry is part of life science: a fast developing multidisciplinary area. The overall aims of this thesis and the work underlying it were to find ways in which to develop competence in biochemistry at university level and to assess complex learning. A particular interest was the development of experimental work as a means to promote learning.</p><p>The study focuses on changes made in two educational settings. The aim of the changes was to develop competence, amongst both students and teachers. Therefore, the research in the three first papers has in some aspects, and to different extent, the characteristics of action research. Broadly, the changes can be described as making experiments more open, with multiple formative and authentic assessment methods involving both students and teachers. The empirical studies included questionnaires, interviews, questions asked during experimental work, written material as formulated objectives, examination questions and answers, reports, other products; and grades/judgements made by teachers and students. Collected data were analyzed in several different ways. Statistical methods included the use of mean values, paired T-tests, Spearman rank correlation coefficients and Principal Component Analysis. Interview data as well as some questionnaire data were analyzed using analytical induction techniques. Some categories were based on thematic content analysis, while others were based on Bloom’s taxonomy. Students’ attitude positions were categorized according to Perry’s framework. </p><p>The main results can be summarized as follows; </p><p>The students’ learning was improved by open ended versions of experimental work, according to both their and the researchers’ opinions. Planning, approaching problems from different perspectives and evaluating the results of their own experimental work promote the students’ capacity for higher order cognitive thinking. However, the synthesis level constitutes a threshold and particular support is needed for students with a more dualistic view of teaching, learning and experimental work. </p><p>Introducing formative and authentic assessment is a way to help students to make progress, and to develop competence. The importance was clearly demonstrated of involving both teachers and students in discussions of aims and criteria and of making them explicit. Feedback from teachers’ and students’ own reflective activities about subject content, and their learning as well as affective factors were shown to be central for complex learning. Based on our studies, areas were identified for the critical development of competence and for promoting learning in biochemistry at university level. These areas are; multidisciplinary and complex learning, communication skills of different types, metacognitive perspectives, attitude development, and affective factors. </p><p>The students see experimental work as crucial for their learning and therefore important in terms of assessment. Therefore, experimental work can and ought to be assessed. However, similarities and discrepancies were observed between students’ and teachers’ perspectives for both the aims and assessment of experimental work. Our conclusion is that a combination of assessment methods is needed in order to be able to make a high qualitative assessment.</p>

Biochemistry is part of life science: a fast developing multidisciplinary area. The overall aims of this thesis and the work underlying it were to find ways in which to develop competence in biochemistry at university level and to assess complex learning. A particular interest was the development of experimental work as a means to promote learning. The study focuses on changes made in two educational settings. The aim of the changes was to develop competence, amongst both students and teachers. Therefore, the research in the three first papers has in some aspects, and to different extent, the characteristics of action research. Broadly, the changes can be described as making experiments more open, with multiple formative and authentic assessment methods involving both students and teachers. The empirical studies included questionnaires, interviews, questions asked during experimental work, written material as formulated objectives, examination questions and answers, reports, other products; and grades/judgements made by teachers and students. Collected data were analyzed in several different ways. Statistical methods included the use of mean values, paired T-tests, Spearman rank correlation coefficients and Principal Component Analysis. Interview data as well as some questionnaire data were analyzed using analytical induction techniques. Some categories were based on thematic content analysis, while others were based on Bloom’s taxonomy. Students’ attitude positions were categorized according to Perry’s framework. The main results can be summarized as follows; The students’ learning was improved by open ended versions of experimental work, according to both their and the researchers’ opinions. Planning, approaching problems from different perspectives and evaluating the results of their own experimental work promote the students’ capacity for higher order cognitive thinking. However, the synthesis level constitutes a threshold and particular support is needed for students with a more dualistic view of teaching, learning and experimental work. Introducing formative and authentic assessment is a way to help students to make progress, and to develop competence. The importance was clearly demonstrated of involving both teachers and students in discussions of aims and criteria and of making them explicit. Feedback from teachers’ and students’ own reflective activities about subject content, and their learning as well as affective factors were shown to be central for complex learning. Based on our studies, areas were identified for the critical development of competence and for promoting learning in biochemistry at university level. These areas are; multidisciplinary and complex learning, communication skills of different types, metacognitive perspectives, attitude development, and affective factors. The students see experimental work as crucial for their learning and therefore important in terms of assessment. Therefore, experimental work can and ought to be assessed. However, similarities and discrepancies were observed between students’ and teachers’ perspectives for both the aims and assessment of experimental work. Our conclusion is that a combination of assessment methods is needed in order to be able to make a high qualitative assessment.

Made available in DSpace on 2014-12-17T14:36:22Z (GMT). No. of bitstreams: 1 JoseEP.pdf: 1644269 bytes, checksum: 79b8ec25e3b491428bb42be521ebaf35 (MD5) Previous issue date: 2009-11-03 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / This paper presents a research realized with Physics, Chemistry and Biology teachers, and it aimed to evaluate: 1) the development level of those teachers regarding the abilities that make possible to teach high school students about how to measure in practical and experimental work; 2) the formatives necessities regarding those abilities; and 3) the order of priority for teacher?s formation regarding those abilities. The study is based on the activity theory, from A. N. Leontiev (1983), since we considerer the teacher?s formation a kind of activity for which the category necessity is source of motivation and in which is a necessary condition for professionality and for the professional development. A questionnaire with open and closed questions was applied to 116 teachers during three pedagogic workshops realized to dynamize the science laboratory. The instrument allowed us to obtain the personal and professional profile of the participants, as well as their development level, their formative necessities and their order of priority about the teaching of the abilities related to the work of testing measuring hypothesis, regarding: a) to operationalize variables of a hypothesis in experimental work; b) to measure in practical and experimental work; c) to estimate possible measuring mistakes and use proper procedures to minimize them; d) to estimate the validity of a measuring; and e) to estimate the confiability of a measuring. The research results indicated some limitations of the teachers about their development level in all the analyzed abilities. More than 90% of the teachers considered those deficiencies as necessities of the continuing formation. Most of them (about 54%) expressed immediate priority for formation in each one of the abilities. From a correlation, using the statistic chi-square test, between the development level and the formative necessities for the five abilities, the obtained results allow us to assure that, for all those teaching abilities, there is a strong correlation between the development level and the formative necessity. This situation is symptomatic of the importance of approaching more the science teaching and the teacher?s formation on practical and experimental work in high school as key-component of scientific education in basic education. The obtained results can contribute, as subsidy, for continuing formation courses, having as base the necessities that constitute motivation elements of the teachers for professional development / O estudo apresenta uma pesquisa realizada com professores de F?sica, Qu?mica e Biologia o qual teve como objetivos avaliar: 1) o grau de desenvolvimento desses professores quanto ?s habilidades que possibilitam ensinar, a alunos do ensino m?dio, a habilidade de medir no trabalho pr?tico e experimental; 2) as necessidades formativas em rela??o a essas habilidades; e 3) a ordem de prioridade para a forma??o docente, no que diz respeito a tais habilidades. O estudo se fundamenta na teoria da atividade, de A. N. Leontiev (1983), uma vez que consideramos a forma??o docente um tipo de atividade para a qual a categoria necessidade ? fonte de motiva??o e na qual ? condi??o necess?ria para a profissionalidade e para o desenvolvimento profissional. Foi aplicado um question?rio de quest?es abertas e quest?es fechadas para 116 professores, durante tr?s oficinas pedag?gicas, realizadas para a dinamiza??o de laborat?rios de ci?ncias. O instrumento permitiu obter-se o perfil pessoal e profissional dos participantes assim como avaliar-se o grau de desenvolvimento destes, sua necessidade formativa e a ordem de prioridade que eles atribu?ram ? tarefa de ensinar as habilidades relativas ao trabalho de testar hip?teses de medir, no que diz respeito a: a) operacionalizar vari?veis de uma hip?tese no trabalho experimental; b) medir no trabalho pr?tico e experimental; c) estimar poss?veis erros de medi??es e utilizar procedimentos adequados para minimiz?-los; d) estimar a validez de uma medi??o; e e) estimar a confiabilidade de uma medi??o. Os resultados da pesquisa indicaram limita??es dos professores quanto ao grau de desenvolvimento em rela??o a todas as habilidades analisadas. Mais de 90% deles consideraram essas defici?ncias como necessidades de forma??o continuada. A maioria (54%, em m?dia) expressou prioridade imediata para forma??o em cada uma das habilidades. A partir de uma correla??o, utilizando-se o teste estat?stico qui-quadrado, entre o grau de desenvolvimento e a necessidade formativa para as cinco habilidades, os resultados obtidos permitem afirmar que, para todas essas habilidades de ensino, existe uma forte correla??o entre o grau de desenvolvimento e a necessidade formativa. Essa situa??o ? sintom?tica da import?ncia de se aproximar mais, no ensino m?dio, o ensino de ci?ncias e a forma??o docente no trabalho pr?tico e experimental, como componente-chave da educa??o cient?fica na educa??o b?sica. Os resultados obtidos podem contribuir, como subs?dio, para cursos de forma??o continuada, tomando como base as necessidades que se constituem em elementos de motiva??o dos professores para o desenvolvimento profissional

Propõe-se o estudo do separador gravitacional de fundo de poço do tipo shroud invertido para poços direcionais e horizontais. A geometria inovadora é observada pela inclinação imposta, solução que transforma um escoamento vertical descendente, veloz e caótico, num escoamento inclinado e segregado em canal livre. Com a inclinação, minimizasse a incorporação de gás, no impacto do escoamento em superfície livre contra a interface de líquido formada pelo nível do anular interno (NAI), e a segregação é incrementada devido ao gradiente de velocidades e ao aparecimento da componente da gravidade na direção radial do poço de petróleo. O trabalho experimental tem como uma de suas metas o levantamento da eficiência de separação em função das vazões de líquido e gás, do ângulo de inclinação e o grau de interferência do escoamento no duto anular formado entre o separador e a parede do poço de petróleo, chamado neste trabalho de anular externo. Foi feito um trabalho de semelhança dimensional e foram detectados os números adimensionais pertinentes ao problema. Constatou-se que a vazão de gás e o escoamento no anular externo não interferem na eficiência de separação. Além disso, foi realizado um trabalho de caracterização dos padrões do escoamento gás-líquido em duto anular, através de visualização e análise no domínio do tempo e da frequência do sinal dinâmico da queda de pressão. Também são propostos dois modelos matemáticos, um modelo fenomenológico baseado em princípios físicos fundamentais, que foi capaz de prever com eficácia a região de máxima eficiência do separador shroud invertido, e um modelo numérico, que reproduziu a fenomenologia do processo de separação do gás. / This research project proposes the study of the inverted-shroud gravitational gas separator for directional and horizontal wells. The innovative geometry is observed by the inclination that transforms a vertical, fast and chaotic downward flow into an inclined and segregated free channel flow. Due to inclination, the incorporation of gas at the internal gasliquid interface (NAI) is minimized; the segregation is increased due to the velocity gradient and the gravitational term that arises in the radial direction of the oil well. One of the aims of the experimental work is the obtaining of new data of gas separation efficiency as a function of the flow of liquid and gas, inclination angle and the evaluation of the degree of interference of the external annular duct flow. A dimensional analysis was undertaken to identify the relevant dimensionless numbers. It was found that the gas flow and the flow pattern in the external annular duct do not interfere in the separation efficiency. A flow pattern characterization was carried out through visualization and time and frequency domain analysis of differential pressure signature signal. Two mathematical models are proposed, a phenomenological model based on fundamental physical principles, which was able to predict with good accuracy the region of maximum separation efficiency, and a numerical model, which reproduced the phenomenology of the gas separation process.