Motivação, comunicação e liderança: caso da PSP portuguesa

Mestrado em Contabilidade e Gestão das Instituições Financeiras

Size distribution of polycyclic aromatic hydrocarbons in a roadway tunnel in Lisbon, Portugal

Atmospheric aerosols of four aerodynamic size ranges were collected using high volume cascade impactors in an extremely busy roadway tunnel in Lisbon (Portugal). Dust deposited on the tunnel walls and guardrails was also collected. Average particle mass concentrations in the tunnel atmosphere were more than 30 times higher than in the outside urban background air, revealing its origins almost exclusively from fresh vehicle emissions. Most of the aerosol mass was concentrated in submicrometer fractions (65%), and polycyclic aromatic hydrocarbons (PAH) were even more concentrated in the finer particles with an average of 84% of total PAH present in sizes smaller than 0.49 mu m. The most abundant PAH were methylated phenanthrenes, fluoranthene and pyrene. About 46% of the total PAH mass was attributed to lower molecular weight compounds (two and three rings), suggesting a strong influence of diesel vehicle emissions on the production of local particulate PAH. The application of diagnostic ratios confirmed the relevance of this source of PAH in the tunnel ambient air. Deposited dust presented PAH profiles similar to the coarser aerosol size range, in agreement with the predominant origin of coarser aerosol particles from soil dust resuspension and vehicle wear products. (c) 201 1 Elsevier Ltd. All rights reserved.

A qualidade das salas de berçários nos concelhos de Setubal e de Palmela

Tendo por principal objetivo contribuir para o estudo da qualidade das creches dos Concelhos de Setúbal e de Palmela, com este trabalho pretende-se (1) avaliar e descrever a qualidade de 30 salas de berçário através da aplicação da Escala de Avaliação do Ambiente de Creche – Edição Revista (Infant/Toddler Environment Rating Scale – Revised Edition [ITERS-R], Harms, Cryer, & Clifford, 2006), (2) avaliar e descrever as práticas de socialização dos prestadores de cuidados responsáveis pelas 30 salas de berçário através da aplicação da Escala de Interação do Prestador de Cuidados (Caregiver Interaction Scale [CIS], Arnett, 1989), (3) estudar a associação entre as práticas de socialização dos profissionais e a qualidade das salas de berçário, (4) estudar associações entre a qualidade das salas de berçário e as práticas de socialização dos profissionais e algumas variáveis de estrutura (rácio adulto/criança, tamanho do grupo, educação, formação e experiência dos prestadores de cuidados). Tendo em conta que os estudos efetuados em Portugal revelam qualidade inadequada e mínima nas salas de creche, os resultados obtidos no presente estudo sugerem que as salas observadas possuem qualidade entre o mínimo e o bom. Embora o presente estudo apresente resultados superiores, verificou-se que os itens que apresentam maiores fragilidades (áreas deficitárias), assim como os itens que expressam maior qualidade (áreas fortes) parecem convergir com os resultados das investigações já efetuadas, com efeito os itens relacionados com as subescalas Atividades e Rotinas de cuidados pessoais são os que apresentam os resultados mais preocupantes. A subescala Interação foi a que apresentou resultados superiores e as práticas de socialização dos prestadores de cuidados revelaram ser excelentes. Verificou-se, igualmente, que as salas orientadas por educadores de infância, assim como, as salas em que o principal prestador de cuidados era educador de infância revelaram qualidade superior do que salas orientadas por assistentes operacionais (auxiliares de ação educativa). Este efeito chama a atenção para a importância da formação e qualificação dos profissionais de educação, assim como, para a necessidade de se alterarem as políticas educativas, nomeadamente no que diz respeito à obrigatoriedade de existirem educadores de infância nas salas de berçário. - ABSTRACT With the main objective of contributing to the study of quality of infant/toddler center-based child care in the Counties of Setúbal and Palmela, this work aims to (1) assess and describe the quality of 30 infant classrooms by applying the Infant/Toddler Environment Rating Scale-Revised Edition ([ITERS-R], Harms, Cryer, & Clifford, 2006), (2) assess and describe the socialization practices of caregivers responsible for 30 infant classrooms by applying the Caregiver Interaction Scale ([CIS], Arnett, 1989), (3) study the association between the socialization practices of professionals and the quality of infant classrooms, (4) to study associations between the quality of infant classrooms and the socialization practices of professionals and some structure variables (ratio adult/child group size, education, training, and experience of carers). Considering that the studies carried out in Portugal reveal minimum or inadequate quality in infant/toddler center-based child care, the results of this study suggest that, in accordance with ITERS-R, the quality of the infant classrooms observed varies between minimum and good. Although the present study reports higher quality scores, it was found that items which present the biggest weaknesses (deficit areas) as well as the items which express higher quality (strengths) appear to converge with the results of the investigations already carried out, since the items related with subscales Activities and Personal Care Routines are those with the most worrisome results. The Interaction subscale from ITERS-R proved to be the one with higher scores, and socialization practices of caregivers proved to be excellent. It was also found that the rooms oriented by early childhood teachers, as well as the rooms in which the primary care provider was also guided by childhood teachers showed higher quality than when guided by operational assistants (educational activities assistants). This effect draws attention to the importance of the education professionals training and qualification, as well as the need for altering the educational policies, in particular as regards the obligation to ensure the existence of early childhood teachers in infant classrooms.

Optimizing memory transactions for large-scale programs

Even though Software Transactional Memory (STM) is one of the most promising approaches to simplify concurrent programming, current STM implementations incur significant overheads that render them impractical for many real-sized programs. The key insight of this work is that we do not need to use the same costly barriers for all the memory managed by a real-sized application, if only a small fraction of the memory is under contention lightweight barriers may be used in this case. In this work, we propose a new solution based on an approach of adaptive object metadata (AOM) to promote the use of a fast path to access objects that are not under contention. We show that this approach is able to make the performance of an STM competitive with the best fine-grained lock-based approaches in some of the more challenging benchmarks. (C) 2015 Elsevier Inc. All rights reserved.

Preserving the validity of the two-Higgs-doublet model up to the Planck scale

We examine the constraints on the two Higgs doublet model (2HDM) due to the stability of the scalar potential and absence of Landau poles at energy scales below the Planck scale. We employ the most general 2HDM that incorporates an approximately Standard Model (SM) Higgs boson with a flavor aligned Yukawa sector to eliminate potential tree-level Higgs-mediated flavor changing neutral currents. Using basis independent techniques, we exhibit robust regimes of the 2HDM parameter space with a 125 GeV SM-like Higgs boson that is stable and perturbative up to the Planck scale. Implications for the heavy scalar spectrum are exhibited.