914 resultados para Using Lean tools
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Dissertação de mestrado integrado em Engenharia e Gestão Industrial
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Dissertação de mestrado integrado em Engenharia e Gestão Industrial
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Dissertação de mestrado integrado em Arquitectura
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Dissertação de mestrado em Engenharia Mecatrónica
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A ciência é uma atividade que torna possível o desenvolvimento tecnológico, social, cultural e económico. É importante avaliar a forma como o mundo científico comunica, nomeadamente a capacidade de adequação da comunicação da ciência às novas ferramentas e às respetivas formas de interação com os públicos. Referimo-nos à comunicação digital que traz potencialidades acrescidas, face à comunicação tradicional. Na verdade, procuraremos demonstrar que o investimento que é feito na comunicação online, inserida numa estratégia de comunicação sólida e coerente, pode trazer benefícios acrescidos à divulgação científica. O Centro de Estudos de Comunicação e Sociedade tem, como preocupação primária, a divulgação dos resultados da sua investigação. A atual inquietação à volta do desinvestimento na ciência torna a avaliação das políticas de comunicação levadas a cabo no CECS uma necessidade premente, para demonstrar a importância da sua atividade e do financiamento necessário à sua prossecução. Neste contexto, esta investigação procura desvendar a importância da comunicação online, no âmbito da comunicação da ciência e da investigação científica. Para este efeito, faremos uma auditoria de comunicação focando-nos nas ferramentas de comunicação online do CECS, procurando perceber a importância da utilização destas na estratégia de divulgação científica.
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Dissertação de mestrado integrado em Engenharia Civil
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Dissertação de mestrado integrado em Engenharia Civil
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Dissertação de mestrado integrado em Engenharia Civil
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Relatório de mestrado em Ciências da Comunicação (área de especialização em Publicidade e Relações Públicas)
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Relatório de estágio de mestrado em Ensino de Música
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Dissertação de mestrado em Bioengenharia
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Dissertação de mestrado em Engenharia Industrial
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BACKGROUND: Retinitis pigmentosa and other hereditary retinal degenerations (HRD) are rare genetic diseases leading to progressive blindness. Recessive HRD are caused by mutations in more than 100 different genes. Laws of population genetics predict that, on a purely theoretical ground, such a high number of genes should translate into an extremely elevated frequency of unaffected carriers of mutations. In this study we estimate the proportion of these individuals within the general population, via the analyses of data from whole-genome sequencing. METHODOLOGY/PRINCIPAL FINDINGS: We screened complete and high-quality genome sequences from 46 control individuals from various world populations for HRD mutations, using bioinformatic tools developed in-house. All mutations detected in silico were validated by Sanger sequencing. We identified clear-cut, null recessive HRD mutations in 10 out of the 46 unaffected individuals analyzed (∼22%). CONCLUSIONS/SIGNIFICANCE: Based on our data, approximately one in 4-5 individuals from the general population may be a carrier of null mutations that are responsible for HRD. This would be the highest mutation carrier frequency so far measured for a class of Mendelian disorders, especially considering that missenses and other forms of pathogenic changes were not included in our assessment. Among other things, our results indicate that the risk for a consanguineous couple of generating a child with a blinding disease is particularly high, compared to other genetic conditions.
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Schistosomiasis control seems to be different in countries were low parasitic burden and asymptomatic clinical patients are the features of majority of cases. Immunological methods must substitute the traditional coprologic techniques used for some decades in the Control Program. Circumoval Precipitin Test (COPT), intradermal test and ELISA with soluble egg antigen (SEA) are evaluated for using as tools for seroepidemiologic studies. COPT and ELISA were performed after treatment to known their utility when impact of chemotherapy must be assessed. One hundred sixty five persons were followed up 3, 6, 9 and 12 months after treatment. The mean sensitivity of CPT studied by age groups was 95.6% which is very important considering that 88.4% of the studied population excreted less than 100 egg/gr of feces, while sensitivity of intradermal test was 58.2%. Children showed the highest ractivity to COPT. When treatment is effective, COPT reactivity progressively disminish until become negative one year later. In the non cure group, the COPT reactivity disminished but never below 20%. ELISA-SEA did not modify one year after treatment. Effort should be made to isolate fractions of eggs Schistosoma mansoni whose antibodies disappear after treatment.
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? BREVIS RADIX (BRX) has been identified through a loss-of-function allele in the Umkirch-1 accession in a natural variation screen for Arabidopsis root growth vigor. Physiological and gene expression analyses have suggested that BRX is rate limiting for auxin-responsive gene expression by mediating cross-talk with the brassinosteroid pathway, as impaired root growth and reduced auxin perception of brx can be (partially) rescued by external brassinosteroid application. ? Using genetic tools, we show that brx mutants also display significantly reduced cotyledon and leaf growth. ? Similar to the root, the amplitude and penetrance of this phenotype depends on genetic background and shares the physiological features, reduced auxin perception and brassinosteroid rescue. Furthermore, reciprocal grafting experiments between mutant and complemented brx shoot scions and root stocks suggest that the shoot phenotypes are not an indirect consequence of the root phenotype. Finally, BRX gain-of-function lines display epinastic leaf growth and, in the case of dominant negative interference, increased epidermal cell size. Consistent with an impact of BRX on brassinosteroid biosynthesis, this phenotype is accompanied by increased brassinosteroid levels. ? In summary, our results demonstrate a ubiquitous, although quantitatively variable role of BRX in modulating the growth rate in both the root and shoot.