Doação de sangue nas redes solidárias onlineinterações, conexões e interconexões sob o olhar do circuito da dádiva

Esta dissertação analisa os diálogos no Facebook, no perfil do Hemorio, o hemocentro do Estado do Rio de Janeiro, durante duas situações de crise, ambas no ano de 2011: as chuvas na Região Serrana do Rio de Janeiro e o ataque da Escola Municipal Tasso da Silveira, em Realengo. Embora estes períodos registrem aumento de mais de 400% nas doações de sangue voluntárias no Hemorio, não se buscou comprovar a \2018veracidade\2019 dos depoimentos ou mensurar a correlação entre as postagens e a doação efetiva. Nosso objetivo maior foi o de identificar os sentidos associados à doação de sangue, as motivações, as relações de troca e os sentimentos, tal como manifestos na mídia digital. Para alargar a compreensão do universo no qual o ato de doar está inscrito, utilizamos os estudos teóricos sobre a dádiva \2013 tanto o trabalho seminal de Marcel Mauss, o \201CEnsaio sobre a Dádiva\201D, como de autores contemporâneos, como Alain Caillé, Jacques Godbout, Paulo Henrique Martins e Alda Lacerda. Esta vertente foi conjugada com as teorias de redes sociais online (Henry Jenkins, Pierre Lévy, Mark Granovetter, Manuel Castells e Raquel Recuero), explorando as conexões entre a tríade \201Cdar, receber e retribuir\201D, como forma de estabelecer as relações sociais, e o universo digital

An assessment of upper ocean salinity content from the ocean reanalyses inter-comparison project (ORA-IP)

Many institutions worldwide have developed ocean reanalyses systems (ORAs) utilizing a variety of ocean models and assimilation techniques. However, the quality of salinity reanalyses arising from the various ORAs has not yet been comprehensively assessed. In this study, we assess the upper ocean salinity content (depth-averaged over 0–700 m) from 14 ORAs and 3 objective ocean analysis systems (OOAs) as part of the Ocean Reanalyses Intercomparison Project. Our results show that the best agreement between estimates of salinity from different ORAs is obtained in the tropical Pacific, likely due to relatively abundant atmospheric and oceanic observations in this region. The largest disagreement in salinity reanalyses is in the Southern Ocean along the Antarctic circumpolar current as a consequence of the sparseness of both atmospheric and oceanic observations in this region. The West Pacific warm pool is the largest region where the signal to noise ratio of reanalysed salinity anomalies is >1. Therefore, the current salinity reanalyses in the tropical Pacific Ocean may be more reliable than those in the Southern Ocean and regions along the western boundary currents. Moreover, we found that the assimilation of salinity in ocean regions with relatively strong ocean fronts is still a common problem as seen in most ORAs. The impact of the Argo data on the salinity reanalyses is visible, especially within the upper 500m, where the interannual variability is large. The increasing trend in global-averaged salinity anomalies can only be found within the top 0–300m layer, but with quite large diversity among different ORAs. Beneath the 300m depth, the global-averaged salinity anomalies from most ORAs switch their trends from a slightly growing trend before 2002 to a decreasing trend after 2002. The rapid switch in the trend is most likely an artefact of the dramatic change in the observing system due to the implementation of Argo.

The Ocean Reanalysis Intercomparison project (ORA-IP)

Uncertainty in ocean analysis methods and deficiencies in the observing system are major obstacles for the reliable reconstruction of the past ocean climate. The variety of existing ocean reanalyses is exploited in a multi-reanalysis ensemble to improve the ocean state estimation and to gauge uncertainty levels. The ensemble-based analysis of signal-to-noise ratio allows the identification of ocean characteristics for which the estimation is robust (such as tropical mixed-layer-depth, upper ocean heat content), and where large uncertainty exists (deep ocean, Southern Ocean, sea ice thickness, salinity), providing guidance for future enhancement of the observing and data assimilation systems.

Intercomparison of the Arctic sea ice cover in global ocean–sea ice reanalyses from the ORA-IP project

Ocean–sea ice reanalyses are crucial for assessing the variability and recent trends in the Arctic sea ice cover. This is especially true for sea ice volume, as long-term and large scale sea ice thickness observations are inexistent. Results from the Ocean ReAnalyses Intercomparison Project (ORA-IP) are presented, with a focus on Arctic sea ice fields reconstructed by state-of-the-art global ocean reanalyses. Differences between the various reanalyses are explored in terms of the effects of data assimilation, model physics and atmospheric forcing on properties of the sea ice cover, including concentration, thickness, velocity and snow. Amongst the 14 reanalyses studied here, 9 assimilate sea ice concentration, and none assimilate sea ice thickness data. The comparison reveals an overall agreement in the reconstructed concentration fields, mainly because of the constraints in surface temperature imposed by direct assimilation of ocean observations, prescribed or assimilated atmospheric forcing and assimilation of sea ice concentration. However, some spread still exists amongst the reanalyses, due to a variety of factors. In particular, a large spread in sea ice thickness is found within the ensemble of reanalyses, partially caused by the biases inherited from their sea ice model components. Biases are also affected by the assimilation of sea ice concentration and the treatment of sea ice thickness in the data assimilation process. An important outcome of this study is that the spatial distribution of ice volume varies widely between products, with no reanalysis standing out as clearly superior as compared to altimetry estimates. The ice thickness from systems without assimilation of sea ice concentration is not worse than that from systems constrained with sea ice observations. An evaluation of the sea ice velocity fields reveals that ice drifts too fast in most systems. As an ensemble, the ORA-IP reanalyses capture trends in Arctic sea ice area and extent relatively well. However, the ensemble can not be used to get a robust estimate of recent trends in the Arctic sea ice volume. Biases in the reanalyses certainly impact the simulated air–sea fluxes in the polar regions, and questions the suitability of current sea ice reanalyses to initialize seasonal forecasts.

Towards expressive rule induction on IP network event streams

In order to gain insights into events and issues that may cause errors and outages in parts of IP networks, intelligent methods that capture and express causal relationships online (in real-time) are needed. Whereas generalised rule induction has been explored for non-streaming data applications, its application and adaptation on streaming data is mostly undeveloped or based on periodic and ad-hoc training with batch algorithms. Some association rule mining approaches for streaming data do exist, however, they can only express binary causal relationships. This paper presents the ongoing work on Online Generalised Rule Induction (OGRI) in order to create expressive and adaptive rule sets real-time that can be applied to a broad range of applications, including network telemetry data streams.

Melatonin and IP(3)-induced Ca(2+) Release from Intracellular Stores in the Malaria Parasite Plasmodium falciparum within Infected Red Blood Cells

IP(3)-dependent Ca(2+) signaling controls a myriad of cellular processes in higher eukaryotes and similar signaling pathways are evolutionarily conserved in Plasmodium, the intracellular parasite that causes malaria. We have reported that isolated, permeabilized Plasmodium chabaudi, releases Ca(2+) upon addition of exogenous IP(3). In the present study, we investigated whether the IP(3) signaling pathway operates in intact Plasmodium falciparum, the major disease-causing human malaria parasite. P. falciparum-infected red blood cells (RBCs) in the trophozoite stage were simultaneously loaded with the Ca(2+) indicator Fluo-4/AM and caged-IP(3). Photolytic release of IP(3) elicited a transient Ca(2+) increase in the cytosol of the intact parasite within the RBC. The intracellular Ca(2+) pools of the parasite were selectively discharged, using thapsigargin to deplete endoplasmic reticulum (ER) Ca(2+) and the antimalarial chloroquine to deplete Ca(2+) from acidocalcisomes. These data show that the ER is the major IP(3)-sensitive Ca(2+) store. Previous work has shown that the human host hormone melatonin regulates P. falciparum cell cycle via a Ca(2+)-dependent pathway. In the present study, we demonstrate that melatonin increases inositol-polyphosphate production in intact intraerythrocytic parasite. Moreover, the Ca(2+) responses to melatonin and uncaging of IP(3) were mutually exclusive in infected RBCs. Taken together these data provide evidence that melatonin activates PLC to generate IP(3) and open ER-localized IP(3)-sensitive Ca(2+) channels in P. falciparum. This receptor signaling pathway is likely to be involved in the regulation and synchronization of parasite cell cycle progression.

Utveckling och analys av en PIC-mikrokontrollers möjligheter att kommunicera via TCP/IP

Sterners Specialfabrik AB tillverkar bland annat mynt- och biljettautomater. För att underlätta felsökning, underhåll, avläsning av statistik med mera på en automat är det lämpligt att detta utförs på en PC över Internet. Det innebär att automaten inte behöver besökas då dessa uppgifter skall utföras. Examensarbetet går ut på att få en PIC mikrokontroller att kommunicera med en användare vid en PC över internet. För detta krävs att en TCP/IP stack implementeras på PICmikrokontrollern. Arbetet ledde till en fungerande demoapplikation som klarar av att kommunicera över TCP/IP. Demoapplikationen innehåller diverse olika funktioner för att demonstrera hur en automat skulle kunna styras och övervakas.

Capital, habitus e as redes no ciberespaço

Valendo-me das categorias da Economia das trocas simbólicas, propostas por Bourdieu, pretendo desenvolver neste artigo uma breve análise das trocas simbólicas produzidas em um novo ambiente sócio-técnico (a internet) e como ele tornou possível o surgimento de um espaço virtual de coalizões (redes de interagentes). Nesse sentido, torna-se fundamental pensar a complexa integração entre as trocas simbólicas no mundo "off-line" e "on-line" que disputam o acesso à produção, apropriação e distribuição universal de novos tipos de recursos mais ou menos escassos. Procuro analisar,brevemente, a relação entre a promessa de abundância e certos tipos de escassez encontrados no ciberespaço e a colocação de uma questão que considero fundamental: a arquitetura distribuída da rede eliminaria totalmente a necessidade de representação e delegação ou estabeleceria diferentes filtros e modalidades de organização e seleção de porta-vozes em novos tipos de comunidades?

Valores determinantes da internacionalização de redes de organizações: mitos e verdades

Dissertação (Mestrado em Administração - Área de Concentração: Gestão de Redes Organizacionais)-USCS, São Caetano do Sul, 2010.

Identificação da estratégia competitiva em redes de organizações no setor de autopeças brasileiro

Dissertação apresentada ao Programa de Mestrado em Administração da Universidade Municipal de São Caetano do Sul - USCS

Uso das redes social Facebook como ferramenta de comunicação na área de educação em saúde: estudo exploratório produção científica da área – 2005 a 2011

El objetivo de esta investigación es registrar la producción académica reciente sobre el uso de las redes sociales como herramientas de comunicación, educación y aprendizaje en el área de la salud, con énfasis en la red social Facebook. La investigación fue recolectada sobre la base de datos del Portal de revistas de Capes, utilizando las palabras clave "Facebook, educación y salud", teniendo como criterio de búsqueda el uso de contenido de acceso abierto más actual, publicado durante el período comprendido entre 2005 y 2011. El estudio señaló 37 trabajos científicos sobre el tema estudiado, 2 brasileños y 35 internacionales.

O site de redes sociais Facebook como espaço da comunicação organizacional

Dissertação apresentada ao Programa de Mestrado em Comunicação da Universidade Municipal de São Caetano do Sul - USCS

Redes Sociais Virtuais: o uso do Twitter pelas universidades públicas

RAMOS, Rogéria Campos. Redes sociais virtuais: o uso do twitter pelas universidades públicas. 2012. 119f. Dissertação (Mestrado em Comunicação)-Universidade Municipal de São Caetano do Sul, São Caetano do Sul, 2012.

Redes interorganizacionais para implementação de programas no setor elétrico brasileiro: estudo de caso do programa "Luz Para Todos" no Estado de São Paulo

Dissertação apresentada ao Programa de Pós-Graduação em Administração da Universidade Municipal de São Caetano do Sul