Busca e uso da informação por alunos(as) dos cursos de Arquivologia e Biblioteconomia da Universidade Federal da Paraíba no período pandêmico: estudo baseado no modelo Sense Making

Based on Brenda Dervin's alternative approach model, Sense Making, the present research aims to understand the process of searching and using information by students of Archival Science and Librarianship courses at the Federal University of Paraíba during classes remote, concerning the academic period 2020.1, carried out in the pandemic The research is characterized as descriptive and case study, with a qualitative approach. To obtain the data, the questionnaire was used, which was built based on the categories of Sense Making and the critical incident technique. For data analysis, the categories of the Sense Making model were used (situation, gap, bridge and helpers), associated with the content analysis technique, to describe the process of searching and using information. The results obtained showed that despite the obstacles imposed by this atypical school period, in general, the students managed to overcome the different obstacles and built bridges that led them to reach the satisfaction of their informational needs. It is concluded, therefore, that the application of the Sense Making model was able to provide an overview of the process of searching and using information by students of Archival Science (6th period) and Librarianship (8th period), during remote classes, in the pandemic period.A partir do modelo de abordagem alternativa de Brenda Dervin, o Sense Making, esta pesquisa tem o objetivo de compreender o processo de busca e uso das informações por alunos dos cursos de Arquivologia e Biblioteconomia da Universidade Federal da Paraíba, durante as aulas remotas, concernente ao período letivo de 2020.1, realizado na pandemia. Foi utilizado o método do estudo de caso, de natureza descritiva, com abordagem qualitativa. Para a obtenção dos dados, utilizou-se o questionário, que foi elaborado com base nas categorias do Sense Making e na técnica do incidente crítico. Para analisar os dados, empregaram-se as categorias do modelo Sense Making – situação, lacuna, ponte e auxiliadores – associadas à técnica de análise de conteúdo, para descrever o processo de busca e uso das informações. Os resultados obtidos demonstraram que, apesar dos obstáculos impostos por esse período letivo atípico, de maneira geral, os alunos conseguiram contornar as adversidades e construir pontes que os levaram a satisfazer às suas necessidades informacionais. Portanto, a aplicação do modelo Sense Making proporcionou uma visão geral acerca do processo de busca e uso da informação pelos alunos de Arquivologia (6º período) e de Biblioteconomia (8º período), durante as aulas remotas ministradas no período pandêmico.

SPH fluids for viscous jet buckling

We present a novel meshfree technique for animating\ud free surface viscous liquids with jet buckling effects, such as\ud coiling and folding. Our technique is based on Smoothed Particle\ud Hydrodynamics (SPH) fluids and allows more realistic and\ud complex viscous behaviors than the preceding SPH frameworks\ud in computer animation literature. The viscous liquid is modeled\ud by a non-Newtonian fluid flow and the variable viscosity under\ud shear stress is achieved using a viscosity model known as Cross\ud model. The proposed technique is efficient and stable, and our\ud framework can animate scenarios with high resolution of SPH\ud particles in which the simulation speed is significantly accelerated\ud by using Computer Unified Device Architecture (CUDA)\ud computing platform. This work also includes several examples\ud that demonstrate the ability of our technique.FAPESP - processos nos. 2013/19760-5 e 2014/11981-5FAPES - processos no. 53600100/11CNP

Concentric RadViz: visual exploration of multi-task classification

The discovery of patterns in large data collections is a difficult task. Visualization and machine learning techniques have emerged as a way to facilitate data analysis, providing tools to uncover relevant patterns from the data. This paper presents Concentric RadViz, a general purpose class visualization system that takes into account multi-class, multi-label and multi-task classifiers. Concentric RadViz uses a force attenuation scheme, which minimizes cluttering and ambiguity in the visual layout. In addition, the user can add concentric circles to the layout in order to represent classification tasks. Our validation results and the application of Concentric RadViz for two real collections suggest that this tool can reveal important data patterns and relations. In our application, the user can interact with the visualization by selecting regions of interest according to specific criteria and changing projection parameters.FAPESP (#2011/22749- 8, #2012/17961-0, #2012/24801-0, #2014/09546-9, #2014/18665-1)CNPq (#132239/2013-2, #305796/2013- 5, #302643/2013-3

Comparação da evolução do transplante hepático em receptores com MELD alto e baixo

OBJECTIVE: To compare low and high MELD scores and investigate whether existing renal dysfunction has an effect on transplant outcome. METHODS: Data was prospectively collected among 237 liver transplants (216 patients) between March 2003 and March 2009. Patients with cirrhotic disease submitted to transplantation were divided into three groups: MELD &gt; 30, MELD < 30, and hepatocellular carcinoma. Renal failure was defined as a ± 25% decline in estimated glomerular filtration rate as observed 1 week after the transplant. Median MELD scores were 35, 21, and 13 for groups MELD &gt; 30, MELD < 30, and hepatocellular carcinoma, respectively. RESULTS: Recipients with MELD &gt; 30 had more days in Intensive Care Unit, longer hospital stay, and received more blood product transfusions. Moreover, their renal function improved after liver transplant. All other groups presented with impairment of renal function. Mortality was similar in all groups, but renal function was the most important variable associated with morbidity and length of hospital stay. CONCLUSION: High MELD score recipients had an improvement in the glomerular filtration rate after 1 week of liver transplantation

[pt] UMA ABORDAGEM LAGRANGEANA PARA SIMULAÇÃO DE ESCOAMENTOS DE FLUIDOS VISCOPLÁSTICOS E MULTIFÁSICOS

Na última década em Computação Gráfica, foram desenvolvidas várias técnicas de simulação do comportamento de objetos como corpos rígidos, água, fumaça, cabelo e tecido. Enquanto essas técnicas se concentram em modelos físicos simplificados através de fluidos newtonianos monofásicos ou de sólidos ideais, propomos aqui novas técnicas de simulação de fluidos viscoplásticos e multifásicos baseadas numa abordagem lagrangeana da equação de quantidade de movimento. Essas técnicas consistem na discretização do fluido através de um sistema de partículas ao invés dos tradicionais métodos baseados em malhas. A simulação computacional da dinâmica de fluidos é feita utilizando o método numérico conhecido como SPH (Smoothed Particle Hydrodynamics). Nessa tese, representamos um material viscoplástico como um fluido não-newtoniano que varia entre os estados sólido e líquido, e de alta para baixa viscosidade dependendo de uma força externa aplicada ao material ou de sua própria temperatura. A simulação de fluidos multifásicos é realizada através de um método híbrido malha-partícula a fim de garantir a incompressibilidade no método SPH.In the last decade in Computer Graphics, they were development many techniques to simulate the behavior of objects such as rigid bodies, water, smoke, hair and cloth. While these techniques focus in simplifled physical models through monophase fluids or ideal solids, we propose new simulation techniques of viscoplastic and multiphase fluids based on a lagrangian approach of momentum equation. These techniques consist in the fluid discretization through particles system instead of traditional grid-based methods. The computational fluid dynamics is performed using the method called SPH (Smoothed Particle Hydrodynamics). In this thesis, we represent a viscoplastic material like a non-newtonian fluid that it varies between solid and liquid states, and from low to high viscosity depending on the external force applied on material or its own temperature. The simulation of multiphase fluids is made using a hybrid method grid- particle to guarantee the incompressibility of SPH method

Approximating implicit curves on plane and surface triangulations with affine arithmetic

We present a spatially and geometrically adaptive method for computing a robust polygonal approximation of an implicit curve defined on a planar region or on a triangulated surface. Our method uses affine arithmetic to identify regions where the curve lies inside a thin strip. Unlike other interval methods, even those based on affine arithmetic, our method works on both rectangular and triangular decompositions and can use any refinement scheme that the decomposition offers.CNPqFAPESPFAPERJFINEPIBM Brasi

Particle-based fluids for viscous jet buckling

In this paper, we introduce a novel meshfree framework for animating free surface viscous liquids with\ud jet buckling effects, such as coiling and folding. Our method is based on Smoothed Particle Hydrodynamics\ud (SPH) fluids and allows more realistic and complex viscous behaviors than the previous SPH\ud frameworks in computer animation literature. The viscous liquid is modeled by a non-Newtonian fluid\ud flow and the variable viscosity under shear stress is achieved using a viscosity model known as Cross\ud model. We demonstrate the efficiency and stability of our framework in a wide variety of animations,\ud including scenarios with arbitrary geometries and high resolution of SPH particles. The interaction of the\ud viscous liquid with complex solid obstacles is performed using boundary particles. Our framework is\ud able to deal with different inlet velocity profiles and geometries of the injector, as well as moving inlet\ud jet along trajectories given by cubic Hermite splines. Moreover, the simulation speed is significantly\ud accelerated by using Computer Unified Device Architecture (CUDA) computing platform.FAPESP (Bolsas nº: 13/19760-5 e 14/09546-9)CNP