995 resultados para CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS


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O trabalho trata da tecnologia de radiodifusão em processo de digitalização. Estabelece os elementos históricos fundamentais que contribuíram para a consolidação de uma indústria da comunicação, características demonstradas nos debates e argumentações em torno da digitalização do setor. Através da descrição das tecnologias digitais a serem empregadas na transição foi possível identificar os potenciais tecnológicos que são formatados socialmente nos atos pela padronização técnica, expondo as limitações e o teor conservador que uma nova tecnologia pode representar.(AU)

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Apesar de o Brasil não apresentar um cenário propício para uma Divulgação Científica eficiente à formação cidadã, nota-se um considerável crescimento no apoio às pesquisas nos últimos anos, principalmente subsidiado pelo fomento de fundações governamentais de diferentes estados. Encontramos, na atualidade, um novo método de expansão informativa, caracterizada pela migração dos meios de comunicação convencionais à internet. Frente a esse desenvolvimento, diversos veículos divulgadores de ciência, com destaque a Pesquisa FAPESP, passaram a empregar esse novo canal no complemento de suas mensagens. Nota-se, porém, uma adoção ainda fragilizada, deixando de lado alguns dos princípios básicos do ciberespaço, tais como a hipertextualidade, por exemplo. A intenção deste trabalho é analisar as ferramentas utilizadas pela Pesquisa FAPESP Online, assim como apontar diversas outras técnicas que poderiam ser inseridas no contexto da Divulgação Científica virtual. Para isso, foi realizada uma entrevista com os editores da revista, bem como uma leitura do portal, com subsídios teóricos da Análise do discurso. Conclui-se que as técnicas praticadas pelo site, embora ainda escassas se comparadas aos demais segmentos do universo digital, são bem utilizadas pelo veículo, preenchendo a lacuna existente na DC e facilitando o acesso da população sobre pesquisas nacionais.(AU)

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A pesquisa é baseada em três eixos principais, comunicação, educação e tecnologias digitais, com uma análise exploratória do mercado de produção de conteúdos para mídias móveis. O estudo é desenvolvido com revisão bibliográfica referente a esses três eixos e com o uso da metodologia qualitativa. São realizadas entrevistas semi-estruturadas com representantes do mercado de comunicação móvel do país, com o objetivo de descrever o fluxo de produção de conteúdos, com foco nas possibilidades de desenvolvimento da aprendizagem móvel. Neste sentido, são verificados os potenciais tecnológicos e comunicacionais do uso das novas Tecnologias da Informação e da Comunicação (TIC), com destaque para o celular, nos modelos de educação formal e informal, a partir de aspectos da Sociedade do Conhecimento, como convergência de mídias, interatividade e produção colaborativa. Observa-se tendências como a valorização do conteúdo em relação aos meios de comunicação e o desenvolvimento de novas experiências de acesso à informação com o uso das tecnologias móveis e convergentes.

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Esta dissertação trata das percepções dos alunos, dos professores e do mercado de trabalho sobre os cursos superiores de tecnologia na região do grande ABC paulista, com a indicação histórica desta formação profissional. Através da análise de fatos que levaram à concepção desta modalidade de ensino e de como ela se integrou na sociedade brasileira atual, representada pela região do grande ABC paulista e do questionamento sócio, cultural e econômico de alunos que estão matriculados em uma instituição de ensino nela situada, bem como a análise das entrevistas realizadas com discentes, docentes e representantes do mercado de trabalho foi possível estabelecer o perfil de ingresso e de egresso destes alunos, uma vez que estão indicados todos os mecanismos possíveis para o percurso estabelecido por esta formação.(AU)

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Esta pesquisa investiga as experiências dos professores nas Séries Iniciais do Ensino Fundamental no Estado de São Paulo, sobre o uso do computador como uma ferramenta de trabalho, procurando identificar as relações que estão construindo com o uso das tecnologias tanto na organização e no planejamento de suas aulas quanto na construção dos saberes pedagógicos que podem fazer com o uso do computador. Identificam-se nesse trabalho o acesso e o domínio que os professores têm no dia-a-dia em relação ao computador (incluindo o acesso à internet) e as experiências que estão realizando com o auxilio do computador e da internet. Foi utilizado o conceito de familiarização para análise da relação do professor com o computador.Foram realizadas entrevistas e aplicados questionários aos professores que atuam nos sistemas de ensino público e privado, no Estado de São Paulo, primeiro nível do Ensino Fundamental (1ª a 4ª séries / 2° ao 5° ano ), e aos alunos do curso de Pedagogia. O trabalho evidenciou que existe uma relação de familiarização dos professores, e esse nível passa pelo interesse e pela experiência individual antes de passar para o lado profissional do uso do computador e internet na sala de aula. Não há evidências de resistência ao uso do computador, as atividades com alunos avançam à medida que o professor se desenvolve no uso da tecnologia.(AU)

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Este estudo apresenta uma pesquisa nas obras de Pierre Lévy, sobre as relações entre educação e tecnologia. A investigação está centrada sobre os conceitos de desterritorialização do conhecimento e descentralização do saber. A temática que o referido autor desenvolve, a respeito dos conceitos de ecologia cognitiva, tecnologias da inteligência e inteligência coletiva, assim como o saber e o conhecimento que permeiam a educação do futuro, é o objetivo central deste trabalho. O objeto de pesquisa é a própria produção do autor. Esses conceitos são problematizados levando em conta duas instâncias: de um lado, o conhecimento acadêmico institucionalizado e de outro lado, a proposta de uma inteligência coletiva, queespaço para uma dimensão mais ampla do saber humano. Lévy reconhece que cada ser humano sabe alguma coisa, e que, em função disto, entende que o conhecimento no lugar de estar reservado a espaços específicos, está presente na humanidade na forma de uma inteligência coletiva. Acredita que a popularização do acesso ao ciberespaço através das tecnologias da inteligência e da cibercultura resulta em um espaço antropológico onde as inteligências coletivas produzem um espaço de saber democrático , possível a todos os seres humanos e, um espaço de produção de diferentes saberes. Esta pesquisa considera também as resistências à proposta de Pierre Lévy, e, aprofunda, de maneira crítica, a idéia enunciada acima, de uma educação do futuro.(AU)

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O advento da Tecnologia da Informação (TI) provocou, em poucos anos de sua evolução, mudanças significativas para a sociedade como um todo. Esta revolução tecnológica acabou por desumanizar e segregar relações familiares, sociais e de trabalho e isto se aplica particularmente ao trabalho dos profissionais da área. Suas conseqüências, entretanto, ainda são pouco conhecidas. As carreiras desses profissionais são circundadas por pressões provocadas por busca constante por novos projetos, adaptação a novos ambientes e culturas organizacionais diversas e remuneração condicionada a prazos, o que exige um gerenciamento constante de suas ações. O presente trabalho teve por objetivo identificar relações entre comprometimento com a carreira, resiliência e intenção de mudança de profissão em profissionais de tecnologia da informação (TI). Intenção de mudança de profissão é a expectativa do profissional de abandonar a profissão atual; comprometimento com a carreira é o vínculo mantido pelo trabalhador com sua carreira ou profissão e resiliência pode ser definida como a capacidade de adaptação positiva diante de situações adversas. Participaram deste estudo 60 profissionais da área de tecnologia da informação. A amostra é predominantemente masculina (75%), com idade entre 25 e 60 anos. Quanto à formação a grande maioria (61,7%) apresenta nível superior completo. O tempo de atuação 66,7% dos respondentes na área de TI encontra-se no intervalo entre um a dez anos de profissão; esses profissionais atuam como autônomos empregados ou cooperados em diversos segmentos de mercado. Os instrumentos de coleta foram a Escala de Avaliação de Resiliência (EAR) e a Escala de Comprometimento com a Carreira. Os dados foram submetidos a análises estatísticas descritivas e de associação. Médias fatoriais e desvios-padrão revelaram que os participantes aceitam positivamente as mudanças, adaptando-se diante de dificuldades da vida e diante de novos projetos e desafios profissionais. Demonstraram ainda que quanto mais resignados são os profissionais de TI, menos eles querem mudar de atividade nesta área de atuação. Os resultados, discutidos à luz da literatura da área, sustentaram em parte as hipóteses testadas neste estudo, ou seja, quanto mais elevados foram os níveis de comprometimento com a carreira, maiores foram os níveis de resiliência relatados e menor foi a intenção de mudar de profissão.

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The scope of this Dissertation is propose the teaching of the evaporation based on the approach Science, Technology and Society (STS) because we believe that this type of approach is able to provide students with a more critical and conscious learning about science. Moreover, with this search, it´s possible to show for students the importance of role to play for them as citizens in decision making aimed to benefit all who are part of the community to which they belong. From this perspective, broached the theme evaporation in a region characterized by constant lack of water for consumption, the municipality of Santa Cruz/RN because, despite the creation of dams to regulate the flow of rivers and increase the availability of water during periods of scarcity, we know that these reservoirs have a large free liquid surface allowing high water loss by evaporation. Thus, evaporation affects the performance of reservoirs for water supply and irrigation, being a phenomenon of particular interest to study. To this end, a questionnaire in order to identify students' preconceptions on the subject was applied. Was then prepared and conducted a workshop geared toward students majoring in Physics Campus Santa Cruz, Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN). The completion of the workshop served as a space for discussion of the topic within the context of the municipality of Santa Cruz/RN. As a product, we suggest to physics teachers a guide with recommendations to be taken into account when they teach this subject

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Nowadays the search for growth makes organizations seeking competitive advantages, project management shares this goal, through techniques that assist in the search for an improved management of the various fields of knowledge through a design methodology. The world is driven by projects and the search for ways to better manage activities such as time, cost and term towards the success of a particular project is something constant. A major contribution that IT can make to the health sector is the support for the management area. IT can integrate processes, optimize the interconnection between the various sectors, make hospitals have access to inside information of good quality, as well as support in the healthcare area, sharing pictures, uniting the various aspects of nursing and nursing service. The major challenge faced by the SESAP Information Technology sector at present is in project management in IT , which does not exist makes investments in the area are increasingly difficult due to this deficiency in management develop their own systems without cost additional to the State. This study seeks to build and strengthen the Project Management within the Department of Health through the implementation of a project office that will manage the final result of this work methodology based on PMBOK, and still show the functionality applied to development the state Hospital Management System that will later be installed on all Regional Health Units and proposing measures for the sustainability and development of the sector amid the difficulties of the current public service. Such action will result in a savings of more than R$ 107,000.00 (one hundred seven thousand) regarding spending private software currently used by the assignment of invested by the State of Rio Grande do Norte user licenses, representing more than 5 % of the total budget of the State Department of Public Health of the State

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The Acquisition Food Program (Programa de Aquisição de Alimentos – PAA) is one of the governmental public politics proposed, in the year of 2003, that has the focus in the family-run farm in Brazil. This Program has as objectives: commercialize the familyrun farm products, bought by the government agencies; to encourage production, and promoting actions that improve quality food of people facing starving risk. This Program has been working, to some extent, as complement to the Program of family-run farm Enhancement (PRONAF). The present study has as its focus to analyse the social territorials changes observed in the state of Rio Grande do Norte, as a result of the PAA implementation. In this sense, it was promoted a discussion between territory and rules. I this work, public politics are understood as rules. This procedure was important in order to understand how the rules have influenced territorial changes, creating new social and territorial relations. In the research process was used scientific and institutional texts on the subject. It was applied a quiz with 97 PAA’s supplying farmers, and interviews were done with the Program managers in Federal (MDA), State (CONAB and EMATER) and municipal (local office of EMATER and Departments of Agriculture) levels. Social public politics were also analyzed with the aim of understand the context where PAA is situated in relation with the public politics directed to familyrun farm as a whole since 1980, within new Brazilian democratization process. With the information collected in the field, plus the secondary data, maps, charts, tables and cartograms were made. With all of this, a socio-economical profile of the family-run farm in the Rio Grande do Norte was traced, as well as the included in this research. Before this picture, we concluded that PAA indeed represents a forward in public politics directed to family-run farm. However, in spite of the importance of the Program for the family-run farmers to come of age, but in order to the rural and family-run farm reality in the Rio Grande do Norte come to present meaningful changes much still remain to be done.

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Heavy metals are present in industrial waste. These metals can generate a large environmental impact contaminating water, soil and plants. The chemical action of heavy metals has attracted environmental interest. In this context, this study aimed to test t he performance of electrochemical technologies for removing and quantifying heavy metals. First ly , the electroanalytical technique of stripping voltammetry with glassy carbon electrode (GC) was standardized in order to use this method for the quantificatio n of metals during their removal by electrocoagulation process (EC). A nalytical curves were evaluated to obtain reliability of the determin ation and quantification of Cd 2+ and Pb 2+ separately or in a mixture. Meanwhile , EC process was developed using an el ectrochemical cell in a continuous flow (EFC) for removing Pb 2+ and Cd 2+ . The se experiments were performed using Al parallel plates with 10 cm of diameter (  63.5 cm 2 ) . The optimization of conditions for removing Pb 2+ and Cd 2+ , dissolved in 2 L of solution at 151 L h - 1 , were studied by applying different values of current for 30 min. Cd 2+ and Pb 2+ concentrations were monitored during electrolysis using stripping voltammetry. The results showed that the removal of Pb 2 + was effective when the EC pro cess is used, obtaining removals of 98% in 30 min. This behavior is dependent on the applied current, which implies an increase in power consumption. From the results also verified that the stripping voltammetry technique is quite reliable deter mining Pb 2+ concentration , when compared with the measurements obtained by atomic absorption method (AA). In view of this, t he second objective of this study was to evaluate the removal of Cd 2+ and Pb 2+ (mixture solution) by EC . Removal efficiency increasing current was confirmed when 93% and 100% of Cd 2+ and Pb 2+ was removed after 30 min . The increase in the current promotes the oxidation of sacrificial electrodes, and consequently increased amount of coagulant, which influences the removal of heavy metals in solution. Adsortive voltammetry is a fast, reliable, economical and simple way to determine Cd 2+ and Pb 2+ during their removal. I t is more economical than those normally used, which require the use of toxic and expensive reagents. Our results demonstrated the potential use of electroanalytical techniques to monitor the course of environmental interventions. Thus, the application of the two techniques associated can be a reliable way to monitor environmental impacts due to the pollution of aquatic ecosystems by heavy metals.

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In this work, the treatment of wastewater from the textile industry, containing dyes as Yellow Novacron (YN), Red Remazol BR (RRB) and Blue Novacron CD (NB), and also, the treatment of wastewater from petrochemical industry (produced water) were investigated by anodic oxidation (OA) with platinum anodes supported on titanium (Ti/Pt) and boron-doped diamond (DDB). Definitely, one of the main parameters of this kind of treatment is the type of electrocatalytic material used, since the mechanisms and products of some anodic reactions depend on it. The OA of synthetic effluents containing with RRB, NB and YN were investigated in order to find the best conditions for the removal of color and organic content of the dye. According to the experimental results, the process of OA is suitable for decolorization of wastewaters containing these textile dyes due to electrocatalytic properties of DDB and Pt anodes. Removal of the organic load was more efficient at DDB, in all cases; where the dyes were degraded to aliphatic carboxylic acids at the end of the electrolysis. Energy requirements for the removal of color during OA of solutions of RRB, NB and YN depends mainly on the operating conditions, for example, RRB passes of 3.30 kWh m-3 at 20 mA cm-2 for 4.28 kWh m-3 at 60 mA cm-2 (pH = 1); 15.23 kWh m-3 at 20 mA cm-2 to 24.75 kWh m-3 at 60 mA cm-2 (pH 4.5); 10.80 kWh m-3 at 20 mA cm-2 to 31.5 kWh m-3 at 60 mA cm-2 (pH = 8) (estimated data for volume of treated effluent). On the other hand, in the study of OA of produced water effluent generated by petrochemical industry, galvanostatic electrolysis using DDB led to the complete removal of COD (98%), due to large amounts of hydroxyl radicals and peroxodisulphates generated from the oxidation of water and sulfates in solution, respectively. Thus, the rate of COD removal increases with increasing applied current density (15-60 mAcm-2 ). Moreover, at Pt electrode, approximately 50% removal of the organic load was achieved by applying from 15 to 30 mAcm-2 while 80% of COD removal was achieved for 60 mAcm-2 . Thus, the results obtained in the application of this technology were satisfactory depending on the electrocatalytic materials and operating conditions used for removal of organic load (petrochemical and textile effluents) as well as for the removal of color (in the case of textile effluents). Therefore, the applicability of electrochemical treatment can be considered as a new alternative like pretreatment or treatment of effluents derived from textiles and petrochemical industries.

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The continuous evolution of integrated circuit technology has allowed integrating thousands of transistors on a single chip. This is due to the miniaturization process, which reduces the diameter of wires and transistors. One drawback of this process is that the circuit becomes more fragile and susceptible to break, making the circuit more susceptible to permanent faults during the manufacturing process as well as during their lifetime. Coarse Grained Reconfigurable Architectures (CGRAs) have been used as an alternative to traditional architectures in an attempt to tolerate such faults due to its intrinsic hardware redundancy and high performance. This work proposes a fault tolerance mechanism in a CGRA in order to increase the architecture fault tolerance even considering a high fault rate. The proposed mechanism was added to the scheduler, which is the mechanism responsible for mapping instructions onto the architecture. The instruction mapping occurs at runtime, translating binary code without the need for recompilation. Furthermore, to allow faster implementation, instruction mapping is performed using a greedy module scheduling algorithm, which consists of a software pipeline technique for loop acceleration. The results show that, even with the proposed mechanism, the time for mapping instructions is still in order of microseconds. This result allows that instruction mapping process remains at runtime. In addition, a study was also carried out mapping scheduler rate. The results demonstrate that even at fault rates over 50% in functional units and interconnection components, the scheduler was able to map instructions onto the architecture in most of the tested applications.

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Inaccurate diagnosis of vulvovaginitis generates inadequate treatments that cause damages women's health. Objective: evaluate the effectiveness of methods when diagnosing vulvovaginitis. Method: a cross-sectional study was performed with 200 women who complained about vaginal discharge. Vaginal smear was collected for microbiological tests, considering the gram stain method as gold standard. The efficacy of the available methods for diagnosis of vaginal discharge was assessed (sensitivity, specificity, positive predictive value and negative predictive value). Data were inserted to Graphpad Prism 6, for statistical analysis. Results: the following results were obtained: wet mount for vaginal candidiasis: sensitivity = 31%; specificity = 97%; positive predictive value (PPV) = 54%; negative predictive value (NPV) =93%; accuracy = 91%. Wet mount for bacterial vaginosis: sensitivity = 80%; specificity =95%; positive predictive value (PPV) = 80%; negative predictive value (NPV) = 95%; accuracy = 92%. Syndromic approach for bacterial vaginosis: sensitivity = 95%; specificity=43%; positive predictive value (PPV) =30%; negative predictive value (NPV) = 97%; accuracy = 54%. Syndromic approach for vaginal candidiasis: sensitivity = 75%; specificity =91%; positive predictive value (PPV) = 26%; negative predictive value (NPV) = 98%; accuracy = 90%. Pap smear for vaginal candidiasis: sensitivity = 68%, specificity = 98%; positive predictive value (PPV) = 86%; negative predictive value (NPV) =96%; accuracy = 96%. Pap smear for bacterial vaginosis: sensitivity = 75%; specificity = 100%; positive predictive value (PPV) = 100%; negative predictive value (NPV) =94%; accuracy = 95%. There was only one case of vaginal trichomoniasis reported – diagnosed by oncological cytology and wet mount – confirmed by Gram. The syndromic approach diagnosed it as bacterial vaginosis. From the data generated and with support on world literature, the Maternidade Escola Januário Cicco’s vulvovaginitis protocol was constructed. Conclusion: Pap smear and wet mount showed respectively low and very low sensitivity for vaginal candidiasis. Syndromic approach presented very low specificity and accuracy for bacterial vaginosis, which implies a large number of patients who are diagnosed or treated incorrectly.

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Location systems have become increasingly part of people's lives. For outdoor environments, GPS appears as standard technology, widely disseminated and used. However, people usually spend most of their daily time in indoor environments, such as: hospitals, universities, factories, buildings, etc. In these environments, GPS does not work properly causing an inaccurate positioning. Currently, to perform the location of people or objects in indoor environments no single technology could reproduce for indoors the same result achieved by GPS for outdoors environments. Due to this, it is necessary to consider use of information from multiple sources using diferent technologies. Thus, this work aims to build an Adaptable Platform for Indoor location. Based on this goal, the IndoLoR platform is proposed. This platform aims to allow information reception from diferent sources, data processing, data fusion, data storage and data retrieval for the indoor location context.