Submitted by Maicon Juliano Schmidt (maicons) on 2015-03-21T14:19:22Z No. of bitstreams: 1 João Luiz Rocha do Nascimento.pdf: 2857036 bytes, checksum: 831e0abf6714c1b8a853becdb2bddfaf (MD5) / Made available in DSpace on 2015-03-21T14:19:22Z (GMT). No. of bitstreams: 1 João Luiz Rocha do Nascimento.pdf: 2857036 bytes, checksum: 831e0abf6714c1b8a853becdb2bddfaf (MD5) Previous issue date: 2014-09-03 / Nenhuma / Plasmado por um viés hermenêutico-filosófico, este estudo tem como objetivo demonstrar que o cumprimento do dever fundamental dos juízes de justificar suas decisões - diretamente vinculado ao direito fundamental do cidadão à obtenção de uma resposta correta - tal como estabelecido na Constituição Federal constitui uma condição de possibilidade para a extinção, no sistema processual-recursal brasileiro, dos embargos de declaração, desconstruindo o mito - fruto de uma equivocada aposta preservativa de uma dogmática jurídica refém de um sentido comum teórico e fatalista que só agrava os sintomas de baixa constitucionalidade da Norma Fundamental - de que se prestam ao aperfeiçoamento das decisões judiciais omissas, contraditórias ou obscuras quando elas não configuram ato judicial adequadamente fundamentado, sendo, por essa razão e desde a origem, nulo. A plena maximização da diretriz constitucional prevista no artigo 93, IX, a partir de uma autêntica compreensão da Constituição, esvazia qualquer razão da existência dos embargos de declaração, o que justifica a necessidade da expunção da ordem jurídica desse instituto de notória disfunção que, nos atuais contornos, encobre o autêntico sentido do ser da norma constitucional que estabelece que todas decisões judiciais devem ser fundamentadas, sob pena de nulidade. / Shaped by a philosophical hermeneutic bias, this study aims to demonstrate that compliance with the fundamental duty of judges to justify their decisions - directly linked to the fundamental right of the citizen to obtain a correct answer - as established in the Federal Constitution constitutes a condition of possibility for extinction on the Brazilian legal-appeal system, the motion for clarification, deconstructing the myth - result of a mistaken preservative bet a legal dogmatic hostage for a common theoretical and fatalistic sense that only exacerbates the symptoms of low constitutionality of the Standard Basic - that lend themselves to the improvement of missing, conflicting or unclear judgments when they do not configure properly reasoned judicial act, being, for this reason and since the origin, null. The full maximization of the constitutional directive granted under Article 93, IX, from an authentic understanding of the Constitution, flush any reason for the existence of motion to clarification, which justifies the necessity of deleting the laws of that institute notorious dysfunction which conceals, in actual contours, the true meaning of being the constitutional rule that all judicial decisions must be reasoned, under penalty of nullity.

Made available in DSpace on 2016-04-26T20:23:32Z (GMT). No. of bitstreams: 1 Guilherme Frederico de Figueiredo Castro.pdf: 2130003 bytes, checksum: 8a5e4b6cc985c50aed5585baff0f800b (MD5) Previous issue date: 2015-03-02 / The purpose of this study is to know a little about the proper tax treatment of cooperative societies, pursuant to article 146, III, c, of the 1988 Federal Constitution. But this only becomes possible to understand before the organizational structure of positive law, its language, the importance of Semiotics studies, the construction of meaning to the prescriptive statements, among other issues that will be necessary to address. Then an immersion within societies will be made as provided for by civil legislation, to make it clear to the reader the legal classification that is judged appropriate for cooperatives. It will also be made legal analysis of the cooperative act and its impact in the tax system. Finally, we will deal on some taxes that we understand to be the most relevant in the daily lives of cooperative societies, including on the fulfillment of the instrumental duties / A proposta deste trabalho é conhecer sobre o adequado tratamento tributário das sociedades cooperativas, conforme disposto no artigo 146, III, c, da Constituição Federal de 1988. Mas isso somente se torna possível se antes compreendermos a estrutura organizacional do Direito Positivo, sua linguagem, a importância dos estudos da Semiótica, a construção de sentido para os enunciados prescritivos, entre outros assuntos que se farão necessários abordar. Em seguida, será feita uma imersão no âmbito das sociedades, tal como prevista pela legislação civil, para que fique claro ao leitor a classificação jurídica que se julga adequada para as cooperativas. Também, será feita a análise jurídica do ato cooperativo e a sua repercussão no âmbito do sistema tributário. Finalmente, trataremos acerca de alguns tributos que compreendemos ser os mais relevantes no cotidiano das sociedades cooperativas, inclusive acerca do cumprimento dos deveres instrumentais

We address the challenge of providing low-cost, universal access of useful information to people in different parts of the globe. We achieve this by following two strategies. First, we focus on the delivery of information through computerized devices and prototype new methods for making that delivery possible in a secure, low-cost, and universal manner. Second, we focus on the use of participatory media, such as blogs, in the context of news related content, and develop methods to recommend useful information that will be of interest to users. To achieve the first goal, we have designed a low-cost wireless system for Internet access in rural areas, and a smartphone-based system for the opportunistic use of WiFi connectivity to reduce the cost of data transfer on multi-NIC mobile devices. Included is a methodology for secure communication using identity based cryptography. For the second goal of identifying useful information, we make use of sociological theories regarding social networks in mass-media to develop a model of how participatory media can offer users effective news-related information. We then use this model to design a recommender system for participatory media content that pushes useful information to people in a personalized fashion. Our algorithms provide an order of magnitude better performance in terms of recommendation accuracy than other state-of-the-art recommender systems. Our work provides some fundamental insights into the design of low-cost communication systems and the provision of useful messages to users in participatory media through a multi-disciplinary approach. The result is a framework that efficiently and effectively delivers information to people in remote corners of the world.

The process of allocating necessary resources like clean water, fuel/energy and food have resulted in an unsustainable use of natural resources causing problems with Soil erosion, soil fertility, desertification, deforestation, eutrophication and global warming. The purpose of this study was to gain information on the functional design of a waste management system enabling the organic components of domestic waste to be processed as useful resources while at the same time allow them to be re-circulated. The main part of this study was carried out at the Kendu SDA Hospital in the Rachyonyo district in western Kenya. For the case of this study two main objectives where chosen. The first was to develop a principal technological solution using three classed “appropriate technologies” found suitable for the purpose namely biogas, ecological water treatment systems and slow sand filtration. The second was to further analyse each included technology to further develop their potential to fit the concept. Results from the pilot facilities where then to be retrieved from the actual component selection and construction process itself, with performance analysis left for future studies. The main purpose of the biogas system study has been to evaluate the original ideas of overall concept, details, materials and construction methods. The 1 m3 biogas system has improved significantly during the development process and is today not far from an implementation, i.e. construction on a slightly larger scale. The biogas system developed during the project has proven to have potential for digestion of both latrine and kitchen waste. Using the two as fuel for the process does not only remove a problem – it grants several benefits. The ecological waste water treatment system main objective was to design and construct a pilot SSF-wetland. Results show that the construction process for smaller scaled SSF systems is simple and does not require trained personnel or specialized equipment and that significant cost reduction can be made by using locally available materials. The slow sand filtration sub system concept is called PT SCX and though still in the stage of development proved to have great potential concerning both efficiency and sustainability. The PT SCX comprises the advantages of slow sand filtration with further development of individual system solutions. It was adapted to enable both integration to the IWESS solution and stand alone installations purifying even highly turbid surface water sources to drinking water quality. The result from the study confirms the suitability of the three included technologies, ecological waste water treatment, biogas and slow sand filtration to work in an integrated system called IWESS- Integrated Water Energy and Sanitation Solution. The combined subsystems can together with source separated sewage offer full resource recovery enabling recirculation of both nutrients and water. In addition the system can be designed as a net producer of renewable and emission free energy.

We address the challenge of providing low-cost, universal access of useful information to people in different parts of the globe. We achieve this by following two strategies. First, we focus on the delivery of information through computerized devices and prototype new methods for making that delivery possible in a secure, low-cost, and universal manner. Second, we focus on the use of participatory media, such as blogs, in the context of news related content, and develop methods to recommend useful information that will be of interest to users. To achieve the first goal, we have designed a low-cost wireless system for Internet access in rural areas, and a smartphone-based system for the opportunistic use of WiFi connectivity to reduce the cost of data transfer on multi-NIC mobile devices. Included is a methodology for secure communication using identity based cryptography. For the second goal of identifying useful information, we make use of sociological theories regarding social networks in mass-media to develop a model of how participatory media can offer users effective news-related information. We then use this model to design a recommender system for participatory media content that pushes useful information to people in a personalized fashion. Our algorithms provide an order of magnitude better performance in terms of recommendation accuracy than other state-of-the-art recommender systems. Our work provides some fundamental insights into the design of low-cost communication systems and the provision of useful messages to users in participatory media through a multi-disciplinary approach. The result is a framework that efficiently and effectively delivers information to people in remote corners of the world.

<p>The process of allocating necessary resources like clean water, fuel/energy and food have resulted in an unsustainable use of natural resources causing problems with Soil erosion, soil fertility, desertification, deforestation, eutrophication and global warming. The purpose of this study was to gain information on the functional design of a waste management system enabling the organic components of domestic waste to be processed as useful resources while at the same time allow them to be re-circulated. The main part of this study was carried out at the Kendu SDA Hospital in the Rachyonyo district in western Kenya. For the case of this study two main objectives where chosen. The first was to develop a principal technological solution using three classed “appropriate technologies” found suitable for the purpose namely biogas, ecological water treatment systems and slow sand filtration. The second was to further analyse each included technology to further develop their potential to fit the concept. Results from the pilot facilities where then to be retrieved from the actual component selection and construction process itself, with performance analysis left for future studies.</p><p>The main purpose of the biogas system study has been to evaluate the original ideas of overall concept, details, materials and construction methods. The 1 m3 biogas system has improved significantly during the development process and is today not far from an implementation, i.e. construction on a slightly larger scale. The biogas system developed during the project has proven to have potential for digestion of both latrine and kitchen waste. Using the two as fuel for the process does not only remove a problem – it grants several benefits.</p><p>The ecological waste water treatment system main objective was to design and construct a pilot SSF-wetland. Results show that the construction process for smaller scaled SSF systems is simple and does not require trained personnel or specialized equipment and that significant cost reduction can be made by using locally available materials.</p><p>The slow sand filtration sub system concept is called PT SCX and though still in the stage of development proved to have great potential concerning both efficiency and sustainability. The PT SCX comprises the advantages of slow sand filtration with further development of individual system solutions. It was adapted to enable both integration to the IWESS solution and stand alone installations purifying even highly turbid surface water sources to drinking water quality.</p><p>The result from the study confirms the suitability of the three included technologies, ecological waste water treatment, biogas and slow sand filtration to work in an integrated system called IWESS- Integrated Water Energy and Sanitation Solution. The combined subsystems can together with source separated sewage offer full resource recovery enabling recirculation of both nutrients and water. In addition the system can be designed as a net producer of renewable and emission free energy.</p>

Persistent poverty, social and economic inequalities are some of the challenges in the process of national development efforts targeted in the United Nations Millennium Development Goals (MDGs). Yet in South Africa, poverty, hunger, social and economic inequalities are still on the increase especially among poor rural to urban migrants. Because of severe poverty in rural areas, large populations of rural poor migrate to urban areas in search of better life. However, the growing energy needs in the urban areas where these people settle and their use of inefficient energy technologies negatively impact on the balance of environmental resources on which their socio-economic development depends. Efficient, affordable and environmental friendly technologies are therefore vital for improving the livelihood conditions and protecting the much needed environmental resources of the country. On the contrary, current practices presently dominating energy provision issues in South Africa are insufficient to solve the problems of socio-economic inequalities, especially for the increasing urban poor population. In addition, they are also failing to protect the environment and natural resources. Electrification of poor urban and peri-urban areas by both grid and off-grid systems through the top-down development practice is doing very little to change the socio-economic conditions of the poor section of the population in the country. Likewise, the provision of modern energy through public sector agencies such as Eskom is inadequate and inappropriate for the rapidly expanding urban and peri-urban poor areas in the country. One major reason that hinders provision of such services to the overcrowded consumer population in these areas is the massive capital investment required and inability to pay electricity bills by urban poor households. Against the above background, this study examined the use of improved wood stoves in two peri-urban areas (Umsilinga and Isnathing) in Pietermaritzburg, South Africa as an alternative modern energy technology on how they would socio-economically benefit the peri-urban poor. It looked at the following: The efficiency of four improved wood stoves (Yamampera, Simunye, Household Rocket and Vesto) in comparison with the three stone open fire, The impact of the efficient burning of the four improved stoves, Factors influencing consumers in choosing a specific energy technology to use, The effectiveness of the improved wood stoves placed in 24 peri-urban households and observed for the specified period, and Additional potentials of such stoves to other prospective users. The key finding of this research is that the use of these improved wood stoves could play a pivital role in household economic growth and improving livelihoods. Participants ranked smokeless burning, low selling price, fuelwood saving and light weight of the stoves as priority preferences for using these stoves. Speed of cooking and less constant attention to the fire were also ranked as important preferences. From women participants view point, the low selling price of the stoves and their considerable fuel saving would reduce strain on the household investment capital, household indoor pollution and tedious work of women’s fuelwood collection. Low investment costs in acquiring the stoves would encourage women’s participation as entrepreneurs in modern energy technologies. However, results from focused group discussions and observations of usage of stoves that were placed in 24 homes showed that the incorporation of consumer preferences in the design of improved wood stoves would be key. This would enable stoves to adequately meet the energy needs of targeted users and be used frequently as an alternative energy solution by both urban and peri-urban poor who are currently lacking electricity and suffering from energy poverty. / Thesis (M.Soc.Sc.)-University of KwaZulu-Natal, Pietermarizburg, 2009.

As tecnologias e a sociedade atual demandam novas competências dos professores. Portanto, a formação inicial desses profissionais é fundamental para que os futuros professores possam integrar as Tecnologias de Informação e Comunicação (TIC), de maneira criativa e inovadora, às suas práticas pedagógicas para potencializar o processo ensino-aprendizagem. Em consequência, as maneiras como os professores formadores se apropriam das TIC para essa formação são de grande importância. O objetivo geral do estudo foi analisar como os professores formadores do Conselho de Formação em Educação (CFE) no Uruguai se apropriam das TIC para a formação de futuros professores. A revisão da literatura aborda conceitos e questões inerentes à apropriação das tecnologias pelos professores: mudanças necessárias na formação de professores; o conceito de apropriação da tecnologia pelos professores, que abrange como os professores adquirem conhecimentos para utilizar as TIC como recursos pedagógicos; os significados que eles constroem sobre a sua importância no processo de ensino-aprendizagem e os usos que eles dão a elas; os aspectos que favorecem ou dificultam os processos de transformação para a inovação com as tecnologias; as discussões sobre a formação inicial para a utilização das TIC como recurso pedagógico; o contexto da formação de professores no Uruguai e as políticas relacionadas às tecnologias. A pesquisa foi qualitativa de natureza interpretativa. O estudo foi realizado em um centro de formação de professores no Uruguai. A técnica de coleta de dados foi a entrevista individual semiestruturada. Os participantes do estudo foram 16 professores que ministram as disciplinas de didática nos diferentes cursos de formação de professores. A amostra foi intencional por critérios. Os principais resultados do estudo foram: a utilização das TIC mantendo metodologias tradicionais com novas ferramentas e a dificuldade de aproveitar as vantagens que as TIC proporcionam para transformar as metodologias de ensino. Entre as dificuldades estão: a falta de conhecimentos sobre como utilizar as TIC como recurso pedagógico; a predominância da individualidade na busca de conhecimentos sobre como integrar as TIC nas aulas e atividades e a necessidade de preparar os formadores em relação às TIC para que possam formar os futuros professores mediante o exemplo. / Technologies and today's society require new competences from teachers. Therefore, teacher training is essential for future teachers to be able to integrate Information and Communication Technologies (ICT) creatively and innovatively into their pedagogical practices to enhance the teaching-learning process. As a consequence, the ways in which teacher trainers appropriate ICT for this training is of great importance. The general objective of this study was to analyze how training teachers of the Education Training Council (CFE) in Uruguay appropriate ICT for the training processes of future teachers. The literature review contemplates concepts and issues inherent to teachers' appropriation of technologies: changes in technological competences needed for teaching, the concept of technology appropriation by teachers, which includes how teachers acquire knowledge to use ICT as pedagogical resources, the meanings they construct about their importance in the teaching-learning process and the uses they give to them; aspects that promote or make it difficult to innovate with technologies; discussions on teacher training for the use of ICT as a pedagogical resource; the context of teacher education and technology education policies in Uruguay. The methodological approach was qualitative. The study was conducted with sixteen teachers at a teacher training center in Uruguay. The technique of data collection was the semi-structured interview. The sample was intentional by criteria. The main results of the study were: the use of ICT maintaining traditional methodologies with new tools; the difficulty of taking advantage of the benefits of ICT to transform teaching methodologies. Among the difficulties were: the lack of knowledge on how to use ICT as pedagogical resources; the predominance of individuality in the search for knowledge on how to integrate ICT; the need to prepare teachers to use ICT to train future teachers by example.

Made available in DSpace on 2015-03-26T12:27:13Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1212927 bytes, checksum: 7adf068a0a8f76b2fa586b434a9e3c65 (MD5) Previous issue date: 2006-03-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The EFC bleaching with the current technologies, based on the chlorine dioxide use represents the second greatest cost in the eucalyptus kraft pulp bleaching (US$ 25-30/t), being the wood the first (US$ 40-80/t). On the other hand, the bleaching reagents offer, typically chlorine dioxide, has been a limiting factor for the production increase in many old industrial units since the units capacity generating this reagent can only be increased by its complete substitution. Besides, the bleaching effluent with the chlorine dioxide is of difficult re-circulation in the chemical recovery. Pulp bleaching alternative technologies, which minimize the use of chlorine dioxide are, therefore, very welcome. The focus of the investigations searching for alternative reagents have been based on the pulp pre-bleaching, i.e., in the two stages of the bleaching sequence, aiming at using less chlorine dioxide and lower the number of kappa pulp that follows the bleaching phase. The practical industrial experience in Brazil shows that the kappa number, after the wood cooking and delignification with oxygen, varies from 9 to 11. The subsequent pulp bleaching with this level of kappa number requires from 33 to 44kg of active chlorine per pulp ton, that is, about 4kg of chlorine per kappa number unit. Therefore, the main objective of this study was to investigate alternatives, which allowed, not only the specific chlorine dioxide consume reduction but also, and mainly, the kappa pulp number reduction that follows to the bleaching phase. Such alternatives included: (1) increase in the delignification efficiency with oxygen by the use of additives and optimization of the operational variables; (2) substitution of the acid stage and/or first de-oxidation stage by a peroxide acid catalyzed with molybdenum salts (PMo) or other salts; (3) industrial evaluation of the PMo stage in a PMoZDP sequence; and (4) NaOH substitution by Mg(OH)2 in the P and Ep stages of the AZDP, a/(Ze)DP and D*(Ep)D bleaching sequences. These objectives accomplishments resulted in the four chapters of this work. The MgSO4 use in the oxygen delignification and the application of the most severe alkali conditions (25kg/t) and of the temperature (115oC) allow the kappa pulp number reduction to values of 9,0, thus reducing the bleaching cost by the Oa/(Ze)DP sequence, without pulp quality loss. The substitution of the sequence AZDP acid stage by the peroxide acetic stage (produced from the glucose pentacetate), also reduced the kappa of the bleaching start, with the bleaching time reduction. The peroxide acid catalyzed with molybdenum (PMo) use in substitution of the acid stage (A) reduced substantially the kappa of the bleaching start, having also reduced the bleaching total cost by the AZDP sequence in R$2,13/t of pulp. Such results were confirmed in a trial mill in a 1200t/day plant without pulp quality loss and the bleaching effluent. The best conditions to operate the PMo stage were: temperature 90-95OC; pH 3,5; 2 hours; 0,1kg/t molybdenum and; 5kg/t hydrogen peroxide. The principal effect of the kappa reduction observed in the PMo stage occurred through the hexenuronic acid removal from the pulp. That the substitution of 25% of the sodium hydroxide and 100% of magnesium sulphate used in the Ep stage by the Mg(OH)2 was demonstrated to be possible without significant damage to the viscosity and brightness of the pulp bleached by the D*(Ep)D sequence / O branqueamento ECF com as tecnologias atuais, à base de dióxido de cloro representa o segundo maior custo de produção de polpa kraft branqueada de eucalipto (US$ 25-30/t), sendo a madeira o primeiro (US$ 40-80/t). Por outro lado, a oferta de reagentes de branqueamento, tipicamente dióxido de cloro, tem sido fator limitante para o aumento da produção de muitas unidades industriais antigas, já que a capacidade de unidades geradoras desse reagente só pode ser aumentada pela sua completa substituição. Além disso, o efluente do branqueamento com dióxido de cloro é de difícil recirculação no sistema de recuperação química da fábrica. Tecnologias alternativas de branqueamento de polpa que minimizem o uso de dióxido de cloro são, portanto, muito bem-vindas. O foco das investigações em busca de reagentes alternativos tem sido na fase de pré-branqueamento da polpa, i.e., nos dois primeiros estágios da seqüência de branqueamento, visando a utilizar menos dióxido de cloro e baixar o número kappa da polpa que segue para a fase de alvejamento. A experiência prática industrial no Brasil demonstra que o número kappa da polpa, após cozimento da madeira e deslignificação com oxigênio, varia de 9 a 11. O branqueamento subseqüente da polpa com esse nível de número kappa requer de 36 a 44kg de cloro ativo por tonelada de polpa, ou seja, cerca de 4kg de cloro ativo por unidade de número kappa. Portanto, o principal objetivo deste estudo foi investigar alternativas que permitissem não só reduzir o consumo específico de dióxido de cloro, mas, principalmente, reduzir o número kappa da polpa que segue para a fase de alvejamento Tais alternativas incluíram: (1) aumento da eficiência de deslignificação com oxigênio pelo uso de aditivos e otimização de variáveis operacionais; (2) substituição do estágio ácido e/ou primeiro estágio de dioxidação por um estágio de peróxido ácido catalisado com sais de molibdênio (PMo) ou outros sais; (3) avaliação industrial do estágio PMo numa seqüência PMoZDP; e (4) substituição do NaOH por Mg(OH)2 nos estágios P e Ep das seqüências de branqueamento AZDP, a/(Ze)DP e D*(Ep)D. O cumprimento desses objetivos resultou nos quatro capítulos deste trabalho. Foi concluído que o uso do MgSO4 na deslignificação com oxigênio associados à aplicação de condições mais severas de álcali (25kg/t) e temperatura (115ºC) permitem reduzir o número kappa da polpa para valores abaixo de 9,0, diminuindo o custo do branqueamento pela seqüência Oa/(Ze)DP, sem prejuízo para a qualidade da polpa. A substituição do estágio ácido da seqüência AZDP, pelo estágio de peroxiacético (produzido a partir do pentacetato de glicose), também reduziu o kappa de entrada do alvejamento. A utilização do estágio de peróxido ácido catalisado com molibdênio (PMo) em substituição ao estágio ácido (A) reduziu o kappa de entrada do alvejamento substancialmente, tendo reduzido também o custo total do branqueamento pela seqüência AZDP em R$2,13/t de polpa. Tais resultados foram confirmados em teste industrial numa planta de 1200t/dia, sem prejuízo para a qualidade da polpa e do efluente de branqueamento. As melhores condições para operar o estágio PMo foram: temperatura 90-95ºC; pH 3,5; 2 horas; 0,1kg/t molibdênio; e 5kg/t peróxido de hidrogênio. O principal efeito da redução do kappa observado no estágio PMo ocorreu pela remoção de ácidos hexenourônicos da polpa. Foi demonstrado ser possível substituir 25% do hidróxido de sódio e 100% do sulfato de magnésio utilizados no estágio Ep pelo Mg(OH)2, sem danos significativos para a viscosidade e alvura da polpa branqueada pela seqüência D*(Ep)D

Many students have difficulty of learning abstract and complex topic in chemistry. This study investigated how students develop their understanding of abstract and complex topics of chemistry with the aid of visualizing tools: animation, simulation and video. A particular focus of this investigation was to assess to what extent the uses of pedagogy based technology (PBT) is effective in learning chemistry. The combined effect of animation, simulation and video clips enable learning by doing and provide opportunity to explore the abstract and complex lessons of chemistry. The research was conducted with sequential embedded mixed research (quasi experimental and Explanatory) case study design. The experiment was carried out with second year chemistry students include 90(14 female and 76 male) students, 12 male chemistry lecturers and the college heads. The students were constituted 45 Control group and 45 Treatment groups. The groups were non-equivalent (convenient samples), suggesting that randomization was not possible as the students were in intact classes. To apply animation, simulation and video in supporting student-centered learning activities of electrochemistry for second year students flash and micro media player were used. The treatment group was trained for two weeks how to operate and use animation, simulation and video software. Pre and Post tests were administrated to the target groups. The effectiveness of PBT was also evaluated by administrating separate Schedule containing open and closed ended questions. The comments and ratings obtained from the learners‟ and lecturer insights provided the basis for the learning impact of the study. The result obtained from the vi experiment and responses of the schedule shows that PBT improves the performance of students. Therefore, to make the abstract and complex concepts of chemistry easy and clear Electrochemistry learning should be supported by animation simulation and video. An extended study may help to understand the multi sensory benefit of Pedagogy-Based-Technology. Thus, a possible extension to this study should cover a variety of universities and should aim at evaluating its effectiveness in various context and subjects‟. / Science and Technology Education / D. Phil. (Mathematics, Science and Technology Education (Chemistry Education))