Este trabalho versa sobre a tecnologia, atendo-se de modo particular, mas não exclusivo, a isso que no Brasil se chama de tecnologia social (TS). A tese que se buscará defender aqui é múltipla. Em primeiro lugar, ontológica e politicamente, sustentar-se-á que a tecnologia social é uma implementação não apenas tecnicamente legítima e autêntica, como social e ambientalmente urgente. Contudo, para que tal tipo de solução seja passível de ser desenvolvida, é necessário, de uma parte, que se desenvolvam conhecimentos científicos e engenheiris apropriados. Com isso, o segundo argumento, epistemológico, é que esses conhecimentos são passíveis de ser produzidos e que os mecanismos que podem tornar tal coisa possível não subvertem o ethos próprio da ciência ou da engenharia. De outra parte, TS e engenharia popular demandam também um perfil profissional específico, o do engenheiro educador (ou engenheiro popular). Essa é a terceira dimensão da tese que defendemos. Por fim, ontológica e existencialmente, proporemos que o caminho para superar o desencantamento substantivo do mundo (Weber), a entificação do Ser (em seu desvelamento tecnológico no qual nos encontramos presos, via enquadramento Heidegger), a ditadura da racionalidade instrumental (Horkheimer & Adorno) ou a autoprodução e o automatismo do desenvolvimento tecnológico (que nos aprisiona ou agencia quase que inapelavelmente Ellul) pode emergir precisamente de algo como a tecnologia social, por meio da incorporação dos valores e saberes populares à construção da realidade sociotécnica que decidimos nos dar. Esse quarto aspecto, nesses termos, reforça o primeiro, trazendo novos elementos para subsidiar-se o entendimento acerca da urgência, em nossos dias, de uma solução técnica como a tecnologia social. / This work discusses technology, giving special attention to this that is called social technology (ST) in Brazil. The thesis that is substantiated here is multiple. First, ontologically and politically, it will be argued that social technology is not only technically legitimate and authentic, but also socially and environmentally urgent. However, in order to be implementable, ST demands, on the one hand, specific engineering and scientific knowledge to be advanced. Thus, the second dimension of our thesis, epistemological, sustains the understanding that such knowledge can be produced and the mechanisms required to make such production possible do not corrupt the scientific or engineering ethos. On the other hand, ST and popular engineering also demand a specific professional profile, the educator engineer (or popular engineer). This is the third dimension of the argument we defend here. Finally, ontologically and existentially, it will be suggested that a way to overcome the substantial disenchantment of the world (Weber), the entification of Being (in its technological unveiling in which we found ourselves trapped, via enframing Heidegger), the dictatorship of instrumental rationality (Horkheimer and Adorno) or the self-production and automatism of technological development (Ellul) may precisely emerge from something like social technology. This would be so by dint of the incorporation of popular values and knowledge to the construction of the sociotechnical reality we decide to build. This fourth aspect, then, strengthens the first one, offering new supporting elements to the urgency claim associated with the development of ST in our days.

A problematização é uma forma de explicitar, de propor as contradições presentes na realidade, e na Sociedade do Conhecimento que prima por habilidades e raciocínio crítico, ela é cada vez mais reforçada, pois trabalha questões complexas associadas aos problemas da realidade. Há pesquisas que apontam com diversas nomenclaturas a forma de conceber e adotar estratégias problematizadoras nos processos educacionais, contudo, poucas pesquisas voltadas para o ensino de Engenharia de Produção apresentam diretrizes aos professores a fim de que, baseando-se nelas, possam elaborar suas propostas pedagógicas possibilitando uma aprendizagem significativa e pensamento crítico. Nesse sentido, o objetivo desta pesquisa é apresentar um modelo de aprendizagem problematizadora, num contexto de aprendizagem presencial e virtual, oportunizando aprendizagem significativa, bem como avaliar o desenvolvimento do pensamento crítico dos alunos. O modelo tem por base uma revisão bibliográfica das teorias, conceitos e práticas da Metodologia da Problematização e do Ciclo de Aprendizagem Experiencial, e para sua aplicação segue com uma pesquisa-ação com alunos de uma disciplina do programa de pós-graduação em Engenharia da Produção de uma universidade pública do interior de São Paulo. Os indicadores de pensamento crítico identificados na literatura, e adaptados para a pesquisa, foram analisados mediante a realização de diversas atividades, trabalhos e discussões dos alunos propostos conforme o modelo de aprendizagem problematizadora. Os resultados revelam que problematizar situações conhecidas ou extraídas da realidade social dos alunos para a compreensão dos conteúdos acadêmicos transforma a aprendizagem em momento significativo, no qual o aluno passa a ser agente ativo no processo de construção do conhecimento e, por consequência, desenvolve em índices expressivamente positivos de pensamento crítico. / The problematization is a way of explicit, proposing the contradictions present in reality, and in the Knowledge Society that values for skills and critical thinking, it is increasingly enhanced, because it works complex issues associated with reality problems. There are research that pointing with various nomenclatures how to conceive and adopt problematizing strategies in the educational processes, however, few research in the area of Production Engineering instruction presents guidelines for teachers, based on them, can develop their pedagogical proposals allowing a significant learning and critical thinking. Accordingly, the objective of this research is to present a model of problematizing learning, in a context of presence and virtual learning, providing opportunities for significative learning, as well as evaluating the development of critical thinking of learners. The model is based on a bibliographic review of theories, concepts and practices of the Problematization Methodology and Experiential Learning Cycle, and its application follows with an action-research with students from a discipline of the graduate program in Production Engineering in a public university in the state of São Paulo. Indicators of critical thinking identified in the literature and adapted to the research, were analyzed by carrying out various activities, assignment and discussions of the proposed learners as the model of problematizing learning. The results show that problematizing known situations or extracted from the social reality of the students to understand the academic content turns learning into a meaningful moment in which the student becomes an active agent in the process of knowledge construction and, therefore, develops in indexes significantly positive of critical thinking.

<div>Although design is part of everyday experience, increased proficiency in managing and reflecting while designing signify greater proficiency as a designer. This capacity for regulation in design is crucial for learning, including from failure experiences, while designing. Failure and iteration are integral parts of design, with potential cognitive and psychological ramifications. On the one hand, failure can be framed as a learning experience that interrupts thinking and evokes reflection. On the other hand, it can be detrimental for confidence and motivation or derail the design process. Based on similarities between design and self-regulation, I articulate a framework whereby responses to failure might be regulated by beginning designers. Then, this case study applies the framework to describe the experiences and perspectives of beginning designers as they work and fail, illuminating issues of failure in design and the extent of their self-regulation.</div><div><br></div><div>The in situ design processes of four teams was examined to describe self-regulation strategies among student designers. Analysis was conducted with two methods: linkography and typological thematic analysis. Linkography, based on think-aloud data, provided a visual representation of the design process and tools to identify reflection, planning, and critical moments in the design process. Typological analysis, based on think-aloud data, follow-up interviews, and design journals, was used to investigate specific strategies of self-regulation. The complementary methods contribute to understanding beginning designers’ self-regulation from multiple perspectives.</div><div><br></div><div>Results portray varied trajectories in design, ranging from repeated failure and determination to fleeting success and satisfaction. Class structures emerge in designers’ patterns of planning and reflection. These highlight the contextualized and evolutionary nature of design and self-regulation. Furthermore, linkographic evidence showed a beginning sense-making process, followed by oscillating phases of forward and backward thinking, to various degrees. Moments of testing, both successes and failure, were critically connected in the design process.</div><div><br></div><div>Thematic analysis identified 10 themes, aligning with the self-regulatory phases of forethought, performance, and reflection. The themes highlight how regulation in forethought is used to shape performance based on past iterations; meanwhile, the identification and attribution of failures relays information on how, and whether to iterate. Collectively, thematic findings reinforce the cyclical nature of design and self-regulation.</div><div><br></div><div>Design and self-regulation are compatible ways of thinking; for designers, the juxtaposition of these concepts may be useful to inform patterns of navigating the problem-solving process. For educators, the imposition of classroom structures in design and self-regulatory thinking draws attention to instructional design and assessment for supporting student thinking. And for researchers of design or self-regulation, these methods can give confidence for further exploration.</div>

Made available in DSpace on 2016-04-27T14:30:47Z (GMT). No. of bitstreams: 1 Joao Jose Evangelista Rabelo.pdf: 6132544 bytes, checksum: fab013c6c714b91ffdcedbf1b3ee8c02 (MD5) Previous issue date: 2011-08-18 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This dissertation aims to identify and understand how a group of engineering instructors appropriate a complex pedagogic framework to reflect on and transform their practices. Initially the author, who is an engineering instructor, shows how the subject teaching engineering became an object of his investigation. The discussion of the Brazilian bibliography on engineering education indicates both the shortage of works on teacher development and the lack of pedagogic proposals based on the complex scientific paradigm. The results of this research support the improvement and innovation of teacher development programs on higher education and the dissemination of Edgar Morin s Complex Thought. The core of this dissertation encompasses three parts: an outline of a complex pedagogic framework; the use of this framework to the instructors theoretical development; and the application of the framework by the instructors to plan and apply new pedagogic actions. The theoretical part of the teacher development program lasted one semester and, under the author s supervision, started with the discussion of the concept of paradigm and its characteristics. This lead to the identification, by the instructors, of an engineering teacher paradigm of the programs they teach. The first discussions put into question traditional scientific thought and raised the interest on the paradigm of complexity, which was introduced. From a new epistemological framework, the Complex Thought, the instructors, based on pedagogic texts, critically reflected on their pedagogic conceptions and practices and were stimulated to think about changes in the light of the theoretical framework they were assimilating. In these activities, the instructors departed from scattered discourses and progressively incorporated the new pedagogic ideas into a more systematic understanding of the phenomena involved in their activities. As a result, they assumed greater responsibility for the improvement of their students academic results. The theoretical learning program finished with its evaluation by the instructors and was followed by the practical part of the program. At the beginning of a new semester the instructors wrote, under supervision, an intervention plan which included problem statement, objectives, activities and bibliography. The actions took place over the course of three months and the results were presented. Each instructor accomplished activities that reflected their prior experiences and pedagogic motivations. The reports demonstrated that many of the concepts learned were effectively used in the reconfiguration of the instructors actions. To a greater or lesser degree all instructors who finished the program were capable to using one or more principles of the Complex Thought theory to improve their pedagogic practices. Finally, the practical development program was evaluated by the instructors / Esta tese tem por objetivo desvelar e compreender como um grupo de docentes em engenharia se apropria de um referencial didático-pedagógico complexo na problematização e transformação de suas práticas. De início o autor, que é docente em engenharia, mostra como o tema docência em engenharia transformou-se em objeto de sua investigação. A discussão da bibliografia brasileira voltada para a educação em engenharia sinaliza tanto a carência de trabalhos de formação docente quanto a inexistência de propostas apoiadas no paradigma científico complexo. Os resultados desta pesquisa favorecem o desenvolvimento e inovação de programas de formação para a docência na educação superior e a difusão do Pensamento Complexo de Edgar Morin. O núcleo da tese compreende três partes: delineamento de um referencial didático-pedagógico de natureza complexa; utilização deste referencial em atividades de formação teórica; aplicação do referencial teórico no planejamento e implantação, pelos docentes, de mudanças em suas práticas pedagógicas. A formação teórica, realizada durante um semestre sob a coordenação do autor, partiu da discussão do conceito de paradigma e de suas características, levando à identificação, pelos professores, de um paradigma de ensino-aprendizagem nos cursos em que lecionam. Estes primeiros resultados favoreceram a crítica do pensamento científico tradicional e uma primeira aproximação ao paradigma da complexidade. A partir de um novo referencial epistemológico, o Pensamento Complexo, os docentes passaram, com o apoio de textos didático-pedagógicos, à problematização de suas práticas e concepções pedagógicas e foram estimulados a pensar mudanças à luz do referencial teórico que assimilavam. Nestas atividades, os docentes partiram de discursos difusos e, progressivamente, incorporaram as novas idéias didático-pedagógicas na forma de uma compreensão mais sistemática dos fenômenos envolvidos em suas atividades pedagógicas. Como resultado, assumiram maior responsabilidade pela melhoria dos resultados acadêmicos de seus alunos. A formação teórica foi encerrada com sua avaliação pelos docentes, ao que se seguiu a fase prática da formação. No início de outro semestre, cada docente elaborou, sob orientação, um projeto de intervenção contendo a problemática, objetivos, atividades a serem realizadas e bibliografia. Durante três meses, as intervenções foram realizadas e em seguida os resultados obtidos foram apresentados, por cada docente, em um relatório final. Os docentes realizaram intervenções que refletiam suas experiências e motivações pedagógicas. Os relatórios demonstraram que muitos dos conceitos apreendidos foram efetivamente utilizados na reconfiguração da ação docente. Em maior ou menor intensidade, todos os docentes que chegaram ao final da formação foram capazes de utilizar um ou mais princípios da teoria do Pensamento Complexo em suas intervenções. Por fim, a formação prática foi avaliada pelos docentes

Made available in DSpace on 2017-07-10T16:28:01Z (GMT). No. of bitstreams: 1 ADRIANA_RAMOS.pdf: 2307727 bytes, checksum: 425a64c60e9491e4ca27b7127e24fd0b (MD5) Previous issue date: 2014-12-09 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Inserted into the research line Society, Knowledge and Education, of the Program of Master in Education from UNIOESTE Campus Francisco Beltrão, in Brazil; this research is included in the debate on labor, education and the teaching of engineering. Through this investigation, we sought to uncover the relationship between epistemology and the conception of teaching-learning from authors of scientific papers published in the annals of COBENGE 2012; in detail those which address teaching and learning of engineering. Through the research, we specifically aimed to: a) understand the teaching of engineering in the context of productive restructuring of the capitalism; b) investigate and analyze the relationship between epistemology and the conception of teaching and learning present in papers published in the annals of COBENGE 2012; c) contribute with discussions concerning the teaching of engineering from the epistemology of the dialectical-historical materialism. We started from the hypothesis that, in an attempt to overcome the traditional pedagogy, teaching in undergraduate courses of engineering would be wavering between the positivist technical rationality and the postmodern practical rationality. Thus, the teachings, by professors, of scientific, abstract concepts from formal logic, have been giving its way to constructive activities of the learners, from empirical situations that favor the development of cognitive, flexible and adaptive competences of individuals to the reality. From such assumption, it is understood that the teaching of engineering would not go through the dialectic-historical logic, which is based on the teaching of concrete. Bibliographic methodology with analysis of contents was applied in this research; in compliance with the explanations of Gil (2002) and Bardin (1977). The theoretical and methodological basis of the research is in accordance with the dialectical and historical materialism, since such method provides theoretical elements that make it possible to understand the contradictions between work, education and the teaching of engineering, and contributes to the discussion and the understanding of new possibilities regarding the formation of engineers. The present work is organized into three parts: the first part presents a discussion over the teaching of engineering in the context of productive restructuring of the capitalism, focusing on the implications of such context over the shift of professional profiles at the postmodernity; it also debates the emergence of the ideology of the end of work society and the upcoming of the knowledge society and with it the emergence of the practical rationality paradigm; the resumption of the motto "learning to learn" and the theory of Jean Piaget in postmodern educational ideas; and also the influence of these theories on official education documents such as the National Curriculum Guidelines for undergraduate degree in engineering. The second part presents an analysis of the annals of COBENGE 2012, over the relationship between epistemology and conceptions of teaching and learning of authors of scientific articles published in that edition of the congress. The third part presents the epistemology of dialectical historical materialism as a way to elicit reflections on the teaching of engineering based on that epistemological paradigm. / Inserida na linha de pesquisa Sociedade, Conhecimento e Educação, do Mestrado em Educação da UNIOESTE - Francisco Beltrão, esta pesquisa inclui-se no debate sobre trabalho, educação e ensino de engenharia. Por meio desta investigação, buscou-se desvelar a relação entre epistemologia e concepção de ensino-aprendizagem dos autores dos artigos científicos publicados nos anais do COBENGE 2012, que abordam o tema ensino-aprendizagem de engenharia. Objetivou-se, especificamente, por meio da pesquisa: a) compreender o ensino de engenharia no contexto de reestruturação produtiva do capitalismo; b) investigar e analisar a relação entre epistemologia e concepção de ensino-aprendizagem no conteúdo dos artigos científicos publicados nos anais do COBENGE 2012; c) contribuir com a discussão sobre o ensino de engenharia a partir da epistemologia do materialismo histórico-dialético. Partiu-se da hipótese de que, na tentativa de superação da pedagogia tradicional, o ensino nos cursos de graduação em engenharia estaria oscilando da racionalidade técnica positivista à racionalidade prática pós-moderna. Dessa forma, o ensino por parte do professor, de conceitos científicos, abstratos, da lógica formal, tem dado lugar às atividades construtivas dos alunos, a partir de situações empíricas que privilegiem o desenvolvimento de competências cognitivas, flexíveis e adaptativas dos indivíduos à realidade. A partir desse pressuposto, entende-se que o ensino de engenharia não passaria pela lógica dialética histórica, que tem por base o ensino do concreto. A metodologia de pesquisa aplicada nesta investigação é bibliográfica com análise de conteúdo e está em conformidade com as explicações de Gil (2002) e Bardin (1977). O fundamento teórico-metodológico da pesquisa está de acordo com o materialismo histórico-dialético, por entender que este método fornece elementos teóricos que possibilitam compreender as contradições existentes entre o trabalho, a educação e o ensino de engenharia, além de contribuir para a discussão e compreensão de novas possibilidades para a formação de engenheiros. Esta pesquisa está organizada em três partes: na primeira parte, é apresentada uma discussão sobre o ensino de engenharia no contexto de reestruturação produtiva do capitalismo, destacando-se as implicações desse contexto na mudança dos perfis profissionais na pós-modernidade; o surgimento da ideologia do fim da sociedade do trabalho e ascensão da sociedade do conhecimento e com ela o surgimento do Paradigma da racionalidade prática; a retomada do lema aprender a aprender e da teoria de Jean Piaget no ideário educacional pós-moderno; e, ainda, as influências dessas teorias em documentos oficiais da educação como as Diretrizes Curriculares Nacionais do curso de graduação em engenharia. Na segunda parte, apresenta-se uma análise realizada dos anais do COBENGE 2012, sobre a relação entre epistemologia e as concepções de ensino-aprendizagem dos autores dos artigos científicos publicados na supracitada edição do congresso. Na terceira parte, apresenta-se a epistemologia do materialismo histórico-dialético como forma de suscitar reflexões acerca do ensino de engenharia com base nesse paradigma epistemológico.

This dissertation investigates the development and use of self-images in augmented reality systems for learning and learning-based activities. This work focuses on self- modeling, a particular form of learning, actively employed in various settings for therapy or teaching. In particular, this work aims to develop novel multimedia systems to support the display and rendering of augmented self-images. It aims to use interactivity (via games) as a means of obtaining imagery for use in creating augmented self-images. Two multimedia systems are developed, discussed and analyzed. The proposed systems are validated in terms of their technical innovation and their clinical efficacy in delivering behavioral interventions for young children on the autism spectrum.

<p>The aim of the research project is to investigate the effectiveness of an information literacy intervention for first year engineering students at the Cape Peninsula University of Technology. Information literacy has been identified as a necessary outcome of tertiary education. It refers to the life-long learning competencies of finding and using information in order to solve problems, to make decisions and to create new knowledge. Information literacy education has evolved from earlier forms of library user education, such as bibliographic instruction, and is central to the mission of academic libraries. However, librarians responsible for information literacy programmes seldom evaluate the effectiveness of their interventions. In today&rsquo / s climate of accountability and outcomes-based education, it is necessary to provide evidence of the benefits of the user education that libraries provide. The researcher uses the American College and Research Library (ACRL) Information Literacy Competency Standards for Higher Education, which are internationally recognized and widely used by South African academic librarians, as a benchmark to evaluate an intervention for a group of first year students enrolled for a mechanical engineering course. The intervention consists of two workshops which aim to teach the students to find information relevant to their essays via the university&rsquo / s OPAC, various engineering databases and to teach them how to reference and cite their sources in their essays. The research methodology assessed students&rsquo / information literacy before and after the two workshops with the use of a questionnaire consisting of a set of questions based on some of the ACRL standards. The questionnaire also gathered data on students&rsquo / prior experience of libraries, reading and computers, which might impact on their information literacy...</p>

Tutoring is one of the most effective instruction methods. Computer as an Intelligent Tutor is an area of research since many decades. Technology advancement in Information and Communication Technology (ICT) can be used in developing Web – based Intelligent Tutoring System (WITS), which provides individualized tutoring at the same time to large number of students geographically distributed. Intelligent Tutoring System requires knowledge representation of expert, student and instructional strategy. While web technology promises many attractive features to build web based ITS, it would still be a challenge to represent knowledge objects that are scalable, reusable and platform independent. It is required to derive generalized knowledge representation framework which can be used in developing WITS for many courses. This research work proposes an instruction System Design (ISD) model based framework in development of WITS for Control Systems. ADDIE model is selected in development of WITS. Front end analysis is conducted to identify the learning goals of a course. Proposed research work presents a Bloom - Vincenti framework for preparing learning objectives for engineering courses. Problem Based Learning (PBL) is selected as instruction strategy. Then it presents an ontology based knowledge representation framework for expert module, tutoring module, and student module. Ontology for expert module is proposed on the course structure, instruction system, instruction material ontology, and Bloom – Vincenti Taxonomy. Ontology for student module is also proposed on course structure and Bloom – Vincenti Taxonomy. Tutoring module consists of ontology about the facts of the instruction material and rule base based on the categories of engineering knowledge (Vincenti) and cognitive skill (Bloom’s Taxonomy). Proposed way of knowledge representation supports scalability, and reusability. Prototype Web – based Intelligent Tutoring System for first level course on Control Systems is developed. JAVA technology used in development of Web – based Intelligent Tutoring System (WITS), makes WITS platform independent. Web – based Intelligent Tutoring System for Control Systems is deployed at laboratory level and its efficacy is tested for first two modules of a course.

<p>The aim of the research project is to investigate the effectiveness of an information literacy intervention for first year engineering students at the Cape Peninsula University of Technology. Information literacy has been identified as a necessary outcome of tertiary education. It refers to the life-long learning competencies of finding and using information in order to solve problems, to make decisions and to create new knowledge. Information literacy education has evolved from earlier forms of library user education, such as bibliographic instruction, and is central to the mission of academic libraries. However, librarians responsible for information literacy programmes seldom evaluate the effectiveness of their interventions. In today&rsquo / s climate of accountability and outcomes-based education, it is necessary to provide evidence of the benefits of the user education that libraries provide. The researcher uses the American College and Research Library (ACRL) Information Literacy Competency Standards for Higher Education, which are internationally recognized and widely used by South African academic librarians, as a benchmark to evaluate an intervention for a group of first year students enrolled for a mechanical engineering course. The intervention consists of two workshops which aim to teach the students to find information relevant to their essays via the university&rsquo / s OPAC, various engineering databases and to teach them how to reference and cite their sources in their essays. The research methodology assessed students&rsquo / information literacy before and after the two workshops with the use of a questionnaire consisting of a set of questions based on some of the ACRL standards. The questionnaire also gathered data on students&rsquo / prior experience of libraries, reading and computers, which might impact on their information literacy...</p>

Professional competencies are explicitly identified in the primary learning outcomes for science and engineering degrees at many tertiary institutions.  Fulfillment of the requirements to equip our students with these skills, while formally acknowledged as important by all stakeholders, can be hard to demonstrate in practice.  Most degree awarding institutions would have difficulties if asked to document where in degree programs such competencies are developed. The work in this thesis addresses the issue of professional competencies from several angles.  The Open-Ended Group Project (OEGP) concept is introduced and proposed as an approach to constructing learning environments in which students’ development of professional competencies can be stimulated and assessed.  Scholarly, research-based development of the IT in Society course unit (ITiS) is described and analyzed in order to present ideas for tailoring OEGP-based course units towards meeting learning objectives related to professional competence.  Work in this thesis includes an examination of both the meanings attributed to the term professional competencies, and methods which can be used to assess the competencies once they are agreed on. The empirical work on developing ITiS is based on a framework for educational research, which has been both refined and extended as an integral part of my research.  The action research methodology is presented and concrete examples of implementations of different pedagogical interventions, based on the methodology, are given.  The framework provides support for relating a theoretical foundation to studies, or development, of learning environments.  The particular theoretical foundation for the examples in this thesis includes, apart from the action research methodology, constructivism, conceptual change, threshold concepts, communities of practice, ill-structured problem solving, the reflective practicum, and problem based learning. The key finding in this thesis is that development and assessment of professional competencies is not a pipe dream.  Assessment can be accomplished, and the OEGP concept provides a flexible base for creating an appropriate learning environment for this purpose. / <p>Felaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 738</p>