Finite element formulation of general boundary conditions for incompressible flows

We study the finite element formulation of general boundary conditions for incompressible flow problems. Distinguishing between the contributions from the inviscid and viscid parts of the equations, we use Nitsche's method to develop a discrete weighted weak formulation valid for all values of the viscosity parameter, including the limit case of the Euler equations. In order to control the discrete kinetic energy, additional consistent terms are introduced. We treat the limit case as a (degenerate) system of hyperbolic equations, using a balanced spectral decomposition of the flux Jacobian matrix, in analogy with compressible flows. Then, following the theory of Friedrich's systems, the natural characteristic boundary condition is generalized to the considered physical boundary conditions. Several numerical experiments, including standard benchmarks for viscous flows as well as inviscid flows are presented

Three-graviton scattering and recoil effects in M-atrix theory

We study the scattering of three gravitons in M-atrix theory at finite N. With a specific choice of the background we obtain the complete result up to two loops. The contributions from three-body forces agree with the ones presented in recent papers. We extend the calculation and evaluate the two-body exchanges as well. Such terms, somewhat difficult to isolate and compute, had been neglected so far in the existing literature. We show that the result we have obtained from M-atrix theory precisely matches the result from one-particle reducible tree diagrams in eleven-dimensional supergravity .Comment: corrected reference to the second paper in ref [6] in which recoil effects were considered and comparative comments added. latex, 22 page

If the party is good, you can stay longer—effects of trait hedonic capacity on hedonic quantity and performance

Research suggests that people’s capacity to successfully pursue hedonic goals is at least as important for well-being as trait self-control. Extending this research, we tested whether trait hedonic capacity is related to more time spent with hedonic goal pursuit (i.e., hedonic quantity) and whether this explains its positive relationship with well-being. Second, we explored whether this may come at a cost for people’s performance. Results show that people with higher trait hedonic capacity do spend more time with hedonic goal pursuit (Study 1 and 2). However, hedonic quality not hedonic quantity accounts for its positive relationship with well-being. Further, people higher vs. lower in trait hedonic capacity perform equally well in their studies (Study 2) and their jobs (Study 3 and 4). Thus, trait hedonic capacity seems to allow people to invest more time into their hedonic goals in a way that does not jeopardize their academic and job performance

If the Party is Good - Effects of Trait Hedonic Capacity on Hedonic Quantity and Performance

Research suggests that people’s capacity to successfully pursue hedonic goals is at least as important for well-being as trait self-control. Extending this research, we tested whether trait hedonic capacity is related to more time spent with hedonic goal pursuit (i.e., hedonic quantity) and whether this explains its positive relationship with well-being. Second, we explored whether this may come at a cost for people’s performance. Results show that people with higher trait hedonic capacity do spend more time with hedonic goal pursuit (Study 1 and 2). However, hedonic quality not hedonic quantity accounts for its positive relationship with well-being. Further, people high in trait hedonic capacity perform equally well in their studies (Study 2) and their jobs (Study 3 and 4). Thus, trait hedonic capacity seems to allow people to invest more time into their hedonic goals in a way that does not jeopardize their academic and job performance

The phenomenon of relapse in alcoholism: an integrative review of international scientific publications (2004-2009)

Esta revisão apresenta um panorama das pesquisas recentes sobre alcoolismo, a fim de caracterizar os tipos predominantes de pesquisa. A partir da base de dados Scopus, foram realizadas buscas com os descritores "relapse" (recaída) e "alcohol" (álcool). Os artigos foram classificados de acordo com a abordagem teórica e metodológica utilizada. Os estudos quantitativos são predominantes; todavia, no que se refere à abordagem teórica, as abordagens cognitivo-comportamentais, neurológicas e epidemiológicas se destacam, o que indica predominância da perspectiva biomédica. Nessa perspectiva, são discutidas tanto as limitações dos estudos quanto a eficácia dos tratamentos que nela se baseiam, reforçando a necessidade de maior investimento em estudos qualitativos e na assimilação da contribuição das ciências sociais para o assunto.Esta revisión presenta un panorama de las pesquisas recientes sobre alcoholismo, a fin de caracterizar los tipos de pesquisa que vienen predominando. A partir de la base de datos Scopus, fueron realizadas búsquedas con los descriptores "relapse" e "alcohol". Los artículos fueron clasificados de acuerdo con el abordaje teórico y metodológico utilizado. Predominan los estudios cuantitativos y, en cuanto al abordaje teórico, se destacan la cognitiva-conductista, la neurológica y la epidemiológica, indicando una hegemonía de la perspectiva biomédica. Se discuten limitaciones de los estudios en esta perspectiva, así como la eficacia de los tratamientos en ella basados, reforzando la necesidad de invertir más en estudios cualitativos y en la asimilación de la contribución de las ciencias sociales al tema.This review presents an overview of recent research on alcoholism in order to characterize the predominant types of research. From the Scopus database, searches were conducted using the keywords "relapse" and "alcohol". The articles were classified according to the theoretical and methodological approach used. Quantitative studies are prevalent, however, in relation to the theoretical approach, the cognitive-behavioral, neurological and epidemiological approaches stand out, which indicates a predominance of the biomedical perspective. In this perspective are discussed both the limitations of the studies and the effectiveness of treatments which are based on them, reinforcing the need for greater investment in qualitative research and in the assimilation of the contribution of social sciences to the subject

A relação entre as práticas de aprendizagem organizacional e o processo de formação de estratégias em uma instituição de ensino preparatória para concurso

<div align="justify">A aprendizagem organizacional vem conquistando espaços nas organizações como um caminho para a obtenção de vantagem competitiva. As Instituições de Ensino, em especial nos últimos tempos, estão dedicando atenção às questões estratégicas, tendo em vista que os gestores passaram a considerar a existência dos clientes e a necessidade de profissionalização da gestão em educação. O objetivo deste artigo é examinar a relação entre as práticas de aprendizagem organizacional e o processo de formação de estratégias em uma Instituição de Ensino Preparatória para Concurso. A metodologia utilizada foi a pesquisa qualitativa, por meio do estudo de caso, do tipo exploratório. Os dados foram coletados através de entrevistas com a Administração da organização pesquisada, análise de documentos e observação direta. Os resultados apresentaram o processo de formação das estratégias, as práticas de aprendizagem organizacionais existentes e como acontece a relação entre essas duas orientações. A partir do estudo foi possível perceber que as práticas de aprendizagem organizacional estão presentes e contribuem de maneira efetiva em diversos momentos da formulação das estratégias. Entretanto, esta contribuição pode ser tornar menos efetiva devido ao fato destas práticas não se configurarem numa escolha consciente e intencional por parte da Instituição.<br><br>Abstract Organizational learning has been gaining space in organizations as way of achieving a competitive edge. Teaching institutions have, especially in recent times, turned their attention to strategic matters, as their administrators have begun both to take their patrons more into account and to consider the need for a professional management in education. The goal of this paper is to examine the relation between organizational learning practices and the process of strategy formation at a teaching institution that offers preparatory classes for civil service exams. A qualitative research methodology was used on a case study of the exploratory kind. Data were gathered by interviewing the institution's administration, analysing documents, and direct observation. The results obtained exhibit the process of strategy formation, the existing organization learning practices, and how these two orientations relate to each other. Based on the study, it was possible to perceive that the organizational learning practices in place effectively contribute for the various stages of strategy formation. However, that contribution may become less effective due to the fact that those practices do not comprise conscious and intentional choices by the Institution.</div

Pulse-Current Electrodeposition for Loading Active Material on Nickel Electrodes for Rechargeable Batteries

Although the pulse-current electrodeposition method is a commonly used technique, it has not been widely employed in electrode preparation. This method was applied to sintered nickel electrodes in a nickel salt solution containing additives. The active material that was obtained, nickel hydroxide, was studied using different characterization techniques. Electrodes impregnated with pulse current had higher capacity than those impregnated with continuous current. The active material is homogeneous and compact with optimum loading and good performance during discharge.These characteristics would provide a large amount of energy in a short time due to an increase in the electrode kinetic reaction.Fil: Becker, María Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Garaventta, Guillermo Norberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Visintin, Arnaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentin

Blendas PP/PU: estudo do efeito do agente compatibilizante e reciclagem de resíduos de PU

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência e Engenharia de Materiais

Spirometrische Modelluntersuchung zum Einfluß von Trachealstenosen auf die Atemfunktion in Abhängigkeit von Stenosenquerschnitt, -länge und -anzahl

Ziel der Untersuchung war es, die Aussagekraft verschiedener Lungenfunktionsparameter hinsichtlich der Beurteilung einer extrathorakalen Obstruktion und den Einfluß von langstreckigen Stenosen und Doppelstenosen auf die Atmung zu untersuchen. Lungengesunde Personen führten durch dem Atemweg vorgeschaltete Lochblendenstenosen unterschiedlichen Durchmessers, Stenosen unterschiedlicher Länge sowie doppelte Stenosen unterschiedlichen Stenosenabstandes exspiratorische und inspiratorische Atemmanöver aus. Der Lungenfunktionsparameter PEF zeigte die größte Aussagekraft für die Diagnostik einer extrathorakalen Obstruktion. PEF sollte zur Diagnostik einer extrathorakalen Atemwegsstenose routinemäßig eingesetzt werden. Die Auswirkung einer Stenose auf die Atmung ist bei gleichem Innendurchmesser nur gering abhängig von ihrer Länge. Bei Atmung durch Doppelstenosen mit kurzem Stenosenabstand werden höhere Atemflusswerte erreicht als bei Doppelstenosen mit großem Stenosenabstand. Um operativ bei Patienten mit langstreckigen Stenosen oder Doppelstenosen eine Funktionsverbesserung der Atmung zu erreichen, müssen strömungsphysikalische Besonderheiten dieser Stenoseformen beachtet werden