Cosmic bulk viscosity through backreaction

We consider an effective viscous pressure as the result of a backreaction of inhomogeneities within Buchert's formalism. The use of an effective metric with a time-dependent curvature radius allows us to calculate the luminosity distance of the backreaction model. This quantity is different from its counterpart for a "conventional" spatially flat bulk viscous fluid universe. Both expressions are tested against the SNIa data of the Union2.1 sample with only marginally different results for the distance-redshift relation and in accordance with the $\Lambda$CDM model. Future observations are expected to be able to discriminate among these models on the basis of indirect measurements of the curvature evolution.Comment: 18 pages, 6 figures, comments and references added, accepted for publication in GR

Personality and Transplantation

A associação entre o tipo de personalidade e vários aspectos relacionados com a doença médica tem sido objecto de abundante investigação. Os modelos teóricos de personalidade que, hoje em dia, são mais utilizados neste contexto são de dois tipos: o modelo de três factores (Neuroticismo, Extroversão e Psicoticismo) e o modelo de 5 factores (neuroticismo e extroversão, a conscenciosidade, agradabilidade, e a abertura à experiência). Os modelos que relacionam a personalidade com a doença médica situam-se entre três tipologias: Hiperreactividade induzida pela personalidade, Predisposição constitucional e Comportamentos deletérios induzidos pela personalidade. Na avaliação da personalidade no doente médico pode optar-se por vários tipos de abordagem: Abordagem Taxonómica vs Dimensional; Auto vs Hetero avaliação; Instrumentos específicos para uma população vs Inespecíficos. São explorados os argumentos que favorecem as várias formas de abordagem. Entre os vários instrumentos disponíveis para avaliar a personalidade destacam-se o NEO-PI nas suas diferentes versões (NEO-PI original, NEO-PI-R, NEO-FFI-60). O NEO-PI-R e o NEO-FFI-60 estão validados para a população portuguesa. Dos poucos estudos disponíveis sobre personalidade no transplante foi possível concluir que o neuroticismo se associava a uma menor qualidade de vida (física, mental, social) no período pós-transplante e a extroversão a uma maior qualidade de vida (física, social), que a personalidade de tipo D se associava a uma pior qualidade de vida e uma maior mortalidade e taxa de rejeição após o transplante e que as perturbações de personalidade não estavam relacionadas com um aumento da taxa de recaída no consumo de álcool em doentes transplantados por doença hepática alcoólica

Anaplastic cutaneous lymphoma mimicking an infection.

We present a case of a 17-year-old boy who presented with a skin lesion with extension to the soft tissues of the left thigh. On ultrasound, a homogeneous and hypoechoic expansile formation in the subcutaneous tissue was found, measuring 6.5 × 5 × 3.5 cm, with scarce vascularization. Computed tomography showed a low attenuating neoformation with surrounding edema. An inflammatory disorder was the first diagnosis, but the absence of improvement with antibiotics led us to perform magnetic resonance imaging that showed a high signal lesion on T2-weighted imaging and low intensity signal on T1-weighted imaging and surrounding contrast uptake. Positron emission tomography and computed tomography showed uptake of 18F-fluorodeoxyglucose by the lesion. The final diagnosis was anaplastic cutaneous lymphoma

Supporting direct care workers in dementia care: effects of a psycho-educational intervention

YesAn experimental study using a pre-posttest control group design was conducted to assess the effects of a person-centred care based psycho-educational intervention on direct care workers’ stress, burnout and job satisfaction. The intervention aimed to develop person-centred care competences and tools for stress management. Four aged care facilities were randomly assigned to a psycho-educational or an education-only intervention (control). Data were collected from fifty-six direct care workers (female, mean age 44.72±9.02) through measurements of burnout (Maslach Burnout Inventory), job satisfaction (Minnesota Satisfaction Questionnaire-short form) and stress (Perceived Stress Scale) and focus-group interviews. Results showed significant positive effects in emotional exhaustion (p=0.029) and positive but no significant effects in stress and job satisfaction. According to qualitative data, the experimental group perceived enhanced group cohesion, emotional management and self-care awareness. Psycho-educational interventions may contribute to reduce direct care workers’ burnout. Further work is needed to determine the extent of its benefits.Portuguese Foundation for Science and Technolog

Sensibility study in a flexible job shop scheduling problem

This paper proposes the impact assessment of the jobs order in the optimal time of operations in a Flexible Job Shop Scheduling Problem. In this work a real assembly cell was studied: the AIP-PRIMECA cell at the Université de Valenciennes et du Hainaut-Cambrésis, in France, which is considered as a Flexible Job Shop problem. The problem consists in finding the machines operations schedule, taking into account the precedence constraints. The main objective is to minimize the batch makespan, i.e. the finish time of the last operation completed in the schedule. Shortly, the present study consists in evaluating if the jobs order affects the optimal time of the operations schedule. The genetic algorithm was used to solve the optimization problem. As a conclusion, it’s assessed that the jobs order influence the optimal time