1,975 research outputs found

    ADMINISTRA??O DE RECURSOS DE MATERIAIS: Um recorte na fun??o de compras no Setor P?blico

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    O presente estudo buscou analisar os poss?veis problemas organizacionais ocorridos em diversas ?reas, durante a realiza??o do est?gio no F?rum da comarca de Santa Rita, o que permitiu fazer um recorte dentre estes e visualizar a necessidade de interven??o no processo de compras, pois os materiais da empresa eram adquiridos de maneira desorganizada, acarretando desperd?cios e preju?zos para a organiza??o. Com isso, este estudo buscou meios de solucionar a seguinte quest?o problema: Qual a dificuldade de uma reparti??o p?blica ter seu almoxarifado organizado, sem que haja problemas ou desperd?cio de materiais? Alinhado a essa perspectiva, este estudo tem como objetivo geral demonstrar as repercuss?es da m? organiza??o do estoque numa reparti??o p?blica, possibilitando um melhor processo na gest?o de compras, de modo a proporcionar condi??es que permitam uma boa gest?o, que traga resultados favor?veis ? organiza??o. Para tanto, fomentou-se estudos no tocante da gest?o de compras, observando como s?o realizadas a aquisi??o dos materiais, o fluxo desse processo, buscando ter uma vis?o mais ampla das inconformidades ocorridas na execu??o de um fluxo de compras, gerando oportunidades que possibilitem eliminar o problema encontrado. Procedeu-se uma revis?o bibliogr?fica, com vistas a elucidar os pressupostos emp?ricos observados em uma institui??o p?blica, que permitiu argumenta??o para poss?veis interven??es que levem a solu??o dos problemas encontrados, culminando numa boa gest?o dos recursos, a partir da identifica??o dos eventuais problemas ocorridos na aquisi??o dos materiais. A partir deste estudo foi poss?vel concluir que os servidores da organiza??o t?m pouco conhecimento sobre o problema encontrado, e por esse motivo, continuaram a repetir os mesmos erros, gerando desperd?cios cada vez maiores para a empresa. Portanto, justificando o que foi exposto, este trabalho proporcionou uma vis?o pr?tica da gest?o de compras voltada para uma empresa p?blica, localizada em uma regi?o metropolitana de Jo?o Pessoa, que passa a ser de grande interesse para pr?pria empresa e para a sociedade, a partir do momento de que sendo um ?rg?o p?blico, deve garantir qualidade, credibilidade e confian?a nos servi?os prestados, estando o bom gerenciamento dos recursos materiais diretamente relacionado com a garantia da continuidade das atividades desenvolvidas nos diversos setores da institui??

    Comparison of the efficiency of ozonation and catalytic ozonation (Mn II and Cu II) in phenol degradation.

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    This paper discusses the results obtained with homogeneous catalytic ozonation [Mn (II) and Cu (II)] in phenol degradation. The reduction of total phenols and total organic carbon (TOC) and the ozone consumption were evaluated. The efficiency in phenol degradation (total phenol removal) at pH 3, with the catalytic process (Mn (II)), increased from 37% to 55% while the TOC removal increased from 4 to 63% in a seven-minute treatment. The ozonation process efficiency at pH 10 was 43% and 39% for phenol and TOC removal, respectively. The presence of both metallic ions (Mn2+ and Cu2+) in the ozonation process resulted in a positive effect.291242

    Preliminary Limits on the WIMP-Nucleon Cross Section from the Cryogenic Dark Matter Search (CDMS)

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    We are conducting an experiment to search for WIMPs, or weakly-interacting massive particles, in the galactic halo using terrestrial detectors. This generic class of hypothetical particles, whose properties are similar to those predicted by extensions of the standard model of particle physics, could comprise the cold component of non-baryonic dark matter. We describe our experiment, which is based on cooled germanium and silicon detectors in a shielded low-background cryostat. The detectors achieve a high degree of background rejection through the simultaneous measurement of the energy in phonons and ionization. Using exposures on the order of one kilogram-day from initial runs of our experiment, we have achieved (preliminary) upper limits on the WIMP-nucleon cross section that are comparable to much longer runs of other experiments.Comment: 5 LaTex pages, 5 eps figs, epsf.sty, espcrc2dsa2.sty. Proceedings of TAUP97, Gran Sasso, Italy, 7-11 Sep 1997, Nucl. Phys. Suppl., A. Bottino, A. di Credico and P. Monacelli (eds.). See also http://cfpa.berkeley.ed

    Unexpectedly long incubation period of Plasmodium vivax malaria, in the absence of chemoprophylaxis, in patients diagnosed outside the transmission area in Brazil

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    <p>Abstract</p> <p>Background</p> <p>In 2010, Brazil recorded 3343,599 cases of malaria, with 99.6% of them concentrated in the Amazon region. <it>Plasmodium vivax </it>accounts for 86% of the cases circulating in the country. The extra-Amazonian region, where transmission does not occur, recorded about 566 cases imported from the Amazonian area in Brazil and South America, from Central America, Asia and African countries. Prolonged incubation periods have been described for <it>P. vivax </it>malaria in temperate climates. The diversity in essential biological characteristics is traditionally considered as one possible explanation to the emergence of relapse in malaria and to the differences in the duration of the incubation period, which can also be explained by the use of chemoprophylaxis. Studying the reported cases of <it>P. vivax </it>malaria in Rio de Janeiro, where there is no vector transmission, has made it possible to evaluate the extension of the incubation period and to notice that it may be extended in some cases.</p> <p>Methods</p> <p>Descriptive study of every malaria patients who visited the clinic in the last five years. The mean, standard deviation, median, minimum and maximum of all incubation periods were analysed.</p> <p>Results</p> <p>From the total of 80 patients seen in the clinic during the study time, with confirmed diagnosis of malaria, 49 (63%) were infected with <it>P. vivax</it>. Between those, seven had an estimated incubation period varying from three to 12 months and were returned travellers from Brazilian Amazonian states (6) and Indonesia (1). None of them had taken malarial chemoprophylaxis.</p> <p>Conclusions</p> <p>The authors emphasize that considering malaria as a possible cause of febrile syndrome should be a post-travel routine, independent of the time elapsed after exposure in the transmission area, even in the absence of malaria chemoprophylaxis. They speculate that, since there is no current and detailed information about the biological cycle of human malaria plasmodia's in Brazil, it is possible that new strains are circulating in endemic regions or a change in cycle of preexisting strains is occurring. Considering that a prolonged incubation period may confer advantages on the survival of the parasite, difficulties in malaria control might arise.</p

    Never Resting Brain: Simultaneous Representation of Two Alpha Related Processes in Humans

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    Brain activity is continuously modulated, even at “rest”. The alpha rhythm (8–12 Hz) has been known as the hallmark of the brain's idle-state. However, it is still debated if the alpha rhythm reflects synchronization in a distributed network or focal generator and whether it occurs spontaneously or is driven by a stimulus. This EEG/fMRI study aimed to explore the source of alpha modulations and their distribution in the resting brain. By serendipity, while computing the individually defined power modulations of the alpha-band, two simultaneously occurring components of these modulations were found. An ‘induced alpha’ that was correlated with the paradigm (eyes open/ eyes closed), and a ‘spontaneous alpha’ that was on-going and unrelated to the paradigm. These alpha components when used as regressors for BOLD activation revealed two segregated activation maps: the ‘induced map’ included left lateral temporal cortical regions and the hippocampus; the ‘spontaneous map’ included prefrontal cortical regions and the thalamus. Our combined fMRI/EEG approach allowed to computationally untangle two parallel patterns of alpha modulations and underpin their anatomical basis in the human brain. These findings suggest that the human alpha rhythm represents at least two simultaneously occurring processes which characterize the ‘resting brain’; one is related to expected change in sensory information, while the other is endogenous and independent of stimulus change

    Social research on neglected diseases of poverty: Continuing and emerging themes

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    Copyright: © 2009 Manderson et al.Neglected tropical diseases (NTDs) exist and persist for social and economic reasons that enable the vectors and pathogens to take advantage of changes in the behavioral and physical environment. Persistent poverty at household, community, and national levels, and inequalities within and between sectors, contribute to the perpetuation and re-emergence of NTDs. Changes in production and habitat affect the physical environment, so that agricultural development, mining and forestry, rapid industrialization, and urbanization all result in changes in human uses of the environment, exposure to vectors, and vulnerability to infection. Concurrently, political instability and lack of resources limit the capacity of governments to manage environments, control disease transmission, and ensure an effective health system. Social, cultural, economic, and political factors interact and influence government capacity and individual willingness to reduce the risks of infection and transmission, and to recognize and treat disease. Understanding the dynamic interaction of diverse factors in varying contexts is a complex task, yet critical for successful health promotion, disease prevention, and disease control. Many of the research techniques and tools needed for this purpose are available in the applied social sciences. In this article we use this term broadly, and so include behavioral, population and economic social sciences, social and cultural epidemiology, and the multiple disciplines of public health, health services, and health policy and planning. These latter fields, informed by foundational social science theory and methods, include health promotion, health communication, and heath education
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