A three dimensional finite volume approach to the thermo-mechanical modelling of the shape casting of metals

This paper presents a three dimensional, thermos-mechanical modelling approach to the cooling and solidification phases associated with the shape casting of metals ei. Die, sand and investment casting. Novel vortex-based Finite Volume (FV) methods are described and employed with regard to the small strain, non-linear Computational Solid Mechanics (CSM) capabilities required to model shape casting. The CSM capabilities include the non-linear material phenomena of creep and thermo-elasto-visco-plasticity at high temperatures and thermo-elasto-visco-plasticity at low temperatures and also multi body deformable contact with which can occur between the metal casting of the mould. The vortex-based FV methods, which can be readily applied to unstructured meshes, are included within a comprehensive FV modelling framework, PHYSICA. The additional heat transfer, by conduction and convection, filling, porosity and solidification algorithms existing within PHYSICA for the complete modelling of all shape casting process employ cell-centred FV methods. The termo-mechanical coupling is performed in a staggered incremental fashion, which addresses the possible gap formation between the component and the mould, and is ultimately validated against a variety of shape casting benchmarks.

Harlow College: Engagement is the key to success

Through provision of iPads to every learner, judicious selection of apps to support learning and investment in developing the digital skills of staff and students, Harlow College is making good progress towards developing independent learners who are well equipped for the world of work.

Transatlantyckie Partnerstwo w dziedzinie Handlu i Inwestycji (TTIP) w kontekście europejskiego bezpieczeństwa ekonomicznego

Celem artykułu jest dokonanie charakterystyki Transatlantyckiego Partnerstwa w dziedzinie Handlu i Inwestycji (Transatlantic Trade and Investment Partnership; TTIP) w szerszym kontekście europejskiego bezpieczeństwa ekonomicznego. Pomysł porozumienia zrodził się w rezultacie fundamentalnych zmian zachodzących współcześnie w gospodarce światowej oraz ich postrzegania w Europie i USA. W tekście stwierdzono, że w zamyśle architektów umowy handlowej główny cel TTIP ma wymiar przede wszystkim geopolityczny, a nie tylko ekonomiczny. Przedstawiono także najważniejsze wnioski, jakie płyną z dotychczas przeprowadzonych analiz dla gospodarki europejskiej, a także zidentyfikowano czynniki, które determinować będą wpływ porozumienia na poszczególne państwa europejskie. W artykule zaprezentowano także możliwe konsekwencje wynikające z wejścia umowy w życie dla Polski. Mogą one być istotne w szczególności dla potencjału rozwojowego polskiej gospodarki oraz bezpieczeństwa ekonomicznego.

La modernización de China y sus implicaciones

Pocos días después de los cambios radicales para la modernización de la China, anunciados • y adoptados durante la tercera reunión plena ria (Octubre 20, 1984) del 12º Comité Central del Partido Comunista Chino, un grupo de 25 Participantes, trece chinos y 12 occidentales, se reunió en Pekin para discutir las implicaciones de estas políticas. El grupo chino formado por el Instituto de Asuntos Foráneos del Pueblo Chino aportó conocimientos acerca de bancos, periodismo, universidades, instituciones científicos y tecnológicos y asuntos foráneos, así como sobre la international Trust and investment Corporation del gobierno. El equipo del Instituto de Aspen incluía conocidos eruditos especializados en economía, ciencia y programas de intercambios chinos; hombres de negocios de amplia experiencia en empresas conjuntas con China; un científico; un periodista y el Director y varios miembros del Instituto de Aspen. El tema principal del seminario lo constituyó la forma cómo la China debe evolucionar para convertirse en una economía socialista moderna después de haber tenido una economía campesina a pequeña escala, sin perder por ello sus característica chinas

Nascentes, veredas e áreas úmidas : revisão conceitual e metodologia de caracterização e determinação : estudo de caso na estação ecológica de águas emendadas - Distrito Federal

Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, 2015.

O serviço de referência nas bibliotecas públicas em Portugal: modelo de desenvolvimento

O Serviço de Referência (SR), incorporando na sua organização, funcionamento e comunicação com o utilizador um conjunto de potencialidades proporcionadas pela tecnologia, assume um papel fundamental na luta contra a desigualdade e o analfabetismo digital, no fomento da literacia da informação e na criação de conhecimento. A percepção do valor e das fragilidades do SR nas bibliotecas públicas em Portugal levanta a questão sobre como contribuir para o seu desenvolvimento. A presente investigação, visando a construção de alicerces numa perspectiva de evolução, parte da análise de documentos orientadores internacionais da RUSA/ALA (Reference and User Services Association / American Library Association) e da IFLA (International Federation of Library Association) e da observação de características estruturais da Rede Nacional de Biblioteca Públicas (RNBP), para a concepção de soluções de desenvolvimento do SR a aplicar a esta realidade concreta. Seguindo um paradigma compreensivo indutivo, com uma orientação baseada na Grounded Theory, esta pesquisa privilegia o contexto da descoberta e a construção de uma teoria. No plano empírico cumpre uma complementaridade de técnicas qualitativas e quantitativas, com recurso a uma triangulação metodológica. O campo de análise abrange a totalidade das bibliotecas públicas portuguesas integradas na RNBP em Portugal. Visando aspectos funcionais e materiais, são analisados dados preexistentes e aplicadas técnicas de observação directa e inquérito por questionário. Visando aspectos sociais, são efectuadas seis entrevistas semi-estruturadas. Os resultados apontam para uma situação de estagnação das bibliotecas da RNBP e para um funcionamento não estruturado e informal do SR, na maioria dos casos em que se verifica a sua disponibilização. Fundamentada a necessidade de evolução, e do investimento que nele possa ser feito, é construído um modelo, seguindo uma estratégia por níveis, flexíveis e adaptáveis às necessidades e aos recursos de cada biblioteca, que visa o desenvolvimento incremental e congruente daquele serviço; Abstract: The Reference Service in public libraries in Portugal. Development model from international guidelines. Incorporating in its organization, procedures and communication with the users a set of tools brought by technology, Reference Service (RS) plays a key role in the struggle against inequality and digital illiteracy, promoting information literacy and creating knowledge. The perception of the value of RS and the weaknesses in public libraries in Portugal raise the question on how to contribute to its development. In order to build RS foundations on an evolutionary perspective, this research analyzes RUSA / ALA (Reference and User Services Association / American Library Association) and IFLA (International Federation of Library Association) international guidelines and the structural characteristics of the Portuguese National Public Library Network (RNBP), with the objective of creating a solution for the development of that service to be applied to this reality. Following an inductive comprehensive paradigm, with an orientation based on Grounded Theory, this research focuses on the context of discovery and the construction of a theory. Empirically it fulfils complementary qualitative and quantitative techniques, using a methodological triangulation. The field of analysis covers Portuguese public libraries integrating the RNBP. Aiming at functional and material aspects, direct observation techniques and a survey by questionnaire are applied. Targeting social aspects, six semistructured interviews are carried out. The results point to a situation of stagnation in the RNBP as well as the unstructured and informal performance of the SR, which justifies the need for evolution and investment. A model is constructed, following a strategy based on levels, flexible and adaptable to the needs and resources of each library, with the perspective of an incremental and consistent development of this service.

Saúde mental e gênero em um CAPS II de Brasília : condições sociais, sintomas, diagnósticos e sofrimento psíquico

Tese (doutorado)—Universidade de Brasília, Instituto de Psicologia, Departamento de Psicologia Clínica, Programa de Pós-graduação em Psicologia Clínica e Cultura, 2016.

Produção de pellets de madeira no Brasil : estratégia, custo e risco do investimento

Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Florestal, Programa de Pós-Graduação em Ciências Florestais, 2015.

Reflections on the Preferential Liberalization of Services Trade

This paper takes stock of the forces that lie behind the recent rise of preferential agreements in services trade. Its focuses first on a number of distinguishing features of services trade that sets it apart from trade in goods and shapes trade liberalization and rule-making approaches in the services field. The paper then documents the nature, modal and sectoral incidence of the trade and investment preferences spawned by preferential trade agreements (PTAs) in services. It does so with a view to addressing the question: how “preferential” is the preferential treatment of services trade? Finally, the paper addresses a number of considerations arising from attempts to multilateralize preferential access and rule-making in services trade.

Design of a new laboratory for quality control of mussel produced in Sagres

Dissertação de mestrado, Qualidade em Análises, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014

Child Health Care in Ireland

The Irish health care system is based on a complex and costly mix of private, statutory, and voluntary provisions. The majority of health care expenditure comes from the state, with a significant proportion of acute hospital care funded from private insurance, but there are relatively high out-of-pocket costs for most service users. There is free access to acute hospital care, but not for primary care, for all children. About 40% of the population have free access to primary care. Universal preventive public health services, including vaccination and immunization, newborn blood spot screening, and universal neonatal hearing screening are free. Major health challenges include poverty, obesity, drug and alcohol use, and mental health. The health care system has been dominated for the last 5 years by the impact of the current recession, which has led to very sharp cuts in health care expenditure. It is unclear if the necessary substantial reform of the system will happen. Government policy calls for a move toward a patient-centered, primary care-led system, but without very substantial transfers of resources and investment in Information and Communication Technology, this is unlikely to occur. The paper has been published as part of an overall report of Child Health in Europe: Diversity of Child Health Care in Europe: A Study of the European Paediatric Association/Union of National European Paediatric Societies and Associations http://www.jpeds.com/issue/S0022-3476(16)X0010-8 . (J Pediatr 2016;177S:S87-106).  

Risk factors associated with negative in-vivo diagnostic results in bovine tuberculosis-infected cattle in Spain

BACKGROUND Despite great effort and investment incurred over decades to control bovine tuberculosis (bTB), it is still one of the most important zoonotic diseases in many areas of the world. Test-and-slaughter strategies, the basis of most bTB eradication programs carried out worldwide, have demonstrated its usefulness in the control of the disease. However, in certain countries, eradication has not been achieved due in part to limitations of currently available diagnostic tests. In this study, results of in-vivo and post-mortem diagnostic tests performed on 3,614 animals from 152 bTB-infected cattle herds (beef, dairy, and bullfighting) detected in 2007-2010 in the region of Castilla y León, Spain, were analyzed to identify factors associated with positive bacteriological results in cattle that were non-reactors to the single intradermal tuberculin test, to the interferon-gamma (IFN-γ) assay, or to both tests applied in parallel (Test negative/Culture + animals, T-/C+). The association of individual factors (age, productive type, and number of herd-tests performed since the disclosure of the outbreak) with the bacteriology outcome (positive/negative) was analyzed using a mixed multivariate logistic regression model. RESULTS The proportion of non-reactors with a positive post-mortem result ranged from 24.3% in the case of the SIT test to 12.9% (IFN-γ with 0.05 threshold) and 11.9% (95% CI 9.9-11.4%) using both tests in parallel. Older (>4.5 years) and bullfighting cattle were associated with increased odds of confirmed bTB infection by bacteriology, whereas dairy cattle showed a significantly lower risk. Ancillary use of IFN-γ assay reduced the proportion of T-/C + animals in high risk groups. CONCLUSIONS These results demonstrate the likelihood of positive bacteriological results in non-reactor cattle is influenced by individual epidemiological factors of tested animals. Increased surveillance on non-reactors with an increased probability of being false negative could be helpful to avoid bTB persistence, particularly in chronically infected herds. These findings may aid in the development of effective strategies for eradication of bTB in Spain.

La economía atlántica: liberalización comercial y efectos económicos

La Unión Europea inició en 2013 la negociación del acuerdo comercial denominado “Partenariado Transatlántico sobre Comercio e Inversión”, más conocido por las siglas en inglés de dicho acuerdo, TTIP (Transatlantic Trade and Investment Partnership). Se trata del acuerdo de libre comercio más importante de la historia de la Unión Europea, con un potencial impacto económico relevante sobre la economía europea, la economía española y, también, sobre el orden comercial multilateral articulado en torno a la Organización Mundial de Comercio y el GATT. Se ha considera oportuno, en consecuencia, investigar de forma rigurosa sobre el potencial impacto económico de este acuerdo comercial. Síntesis La tesis doctoral tiene por objetivo desarrollar el marco analítico en el cual evaluar el potencial impacto económico del acuerdo comercial conocido como TTIP. Pretende, en primer lugar, a la luz de las estadísticas oficiales disponibles, analizar en profundidad la economía atlántica, desde la perspectiva de los flujos de comercio de bienes y servicios y de los flujos de inversión, y aplicar la nueva teoría pura del comercio internacional (bajo supuestos de economías de escala, diferenciación de producto y preferencia por la variedad en las funciones de demanda del consumidor) a la explicación de los intercambios comerciales atlánticos. Se propone asimismo aplicar la teoría económica al análisis del impacto de las variaciones de los precios internacionales de los inputs energéticos o commodities sobre la economía atlántica. El segundo objetivo es profundizar en el análisis de las barreras que aún obstaculizan los intercambios comerciales de bienes y servicios y los flujos de capitales y de personas en la “economía atlántica”. Se trata de extender el análisis desde los obstáculos comerciales tradicionales (aranceles y contingentes), a los que subyacen en la regulación, los estándares técnicos, las reglas sobre compras públicas, las decisiones en el ámbito de la política de defensa de la competencia o en el uso de los instrumentos de defensa comercial. El análisis horizontal de las barreras se complementa con otro de carácter sectorial. Sin este ejercicio no es posible evaluar correctamente el impacto potencial de una liberalización comercial atlántica completa y profunda...

La confianza en las decisiones de presupuesto de capital: la TIR del comportamiento

En el presente artículo se desarrolla una investigación teórica que permite establecer un modelo matemático para cuantificar la influencia de la confianza de los gerentes en el proceso de presupuesto de capital, en particular sobre la Tasa Interna de Retorno. El Modelo permite concluir que el exceso de confianza es un factor que tiende a elevar esta tasa que esperan recibir los inversionistas tras invertir en determinados proyectos, generando así, en ciertas ocasiones, una toma de decisiones al interior de las empresas basada en cifras sesgadas, comprometiendo así los recursos de la misma.

Cálculo de constantes ópticas de películas delgadas de Cu3BiS3 a través del método de Wolfe

Se calculó la obtención de las constantes ópticas usando el método de Wolfe. Dichas contantes: coeficiente de absorción (α), índice de refracción (n) y espesor de una película delgada (d ), son de importancia en el proceso de caracterización óptica del material. Se realizó una comparación del método del Wolfe con el método empleado por R. Swanepoel. Se desarrolló un modelo de programación no lineal con restricciones, de manera que fue posible estimar las constantes ópticas de películas delgadas semiconductoras, a partir únicamente, de datos de transmisión conocidos. Se presentó una solución al modelo de programación no lineal para programación cuadrática. Se demostró la confiabilidad del método propuesto, obteniendo valores de α = 10378.34 cm−1, n = 2.4595, d =989.71 nm y Eg = 1.39 Ev, a través de experimentos numéricos con datos de medidas de transmitancia espectral en películas delgadas de Cu3BiS3.