A influência dos parâmetros nas estimativas VAR: caso prático

Dissertação de Mestrado em Finanças Empresariais

Desigualdades sociodemográficas e suas conseqüências sobre o peso do recém-nascido

OBJETIVO: Analisar as desigualdades sociodemográficas, na assistência pré-natal e ao parto e suas conseqüências sobre o peso ao nascer. MÉTODOS: Estudo realizado em amostra de 10.072 puérperas atendidas em maternidades públicas, conveniadas com o Sistema Único de Saúde, e particulares do Município do Rio de Janeiro, no período de 1999-2001. Para verificar a associação entre peso ao nascer e características maternas, sociodemográficas, biológicas e da assistência pré-natal (índice de Kotelchuck modificado), realizaram-se regressões lineares múltiplas, estratificando as puérperas segundo nível de instrução. Foi utilizada a técnica de bootstrap com intervalos de confiança acurados para as estimativas dos efeitos. RESULTADOS: Na análise bivariada, para quase todas as variáveis estudadas, as médias de peso ao nascer foram menores entre as mães de escolaridade mais baixa. Na análise da regressão múltipla para o grupo de baixa escolaridade, o peso ao nascer associou-se diretamente com o índice de Kotelchuck modificado e a idade gestacional, e inversamente com as variáveis cor da pele preta, hábito de fumar e a experiência de filhos prematuros anteriores. Idade materna e paridade tiveram comportamentos distintos nos extremos e na faixa central dos dados. No grupo de maior escolaridade somente a paridade, a idade gestacional e o índice de Kotelchuck modificado foram significativos e se associaram diretamente com o peso ao nascer. Verificou-se o papel protetor da assistência pré-natal, assim como o efeito negativo do hábito de fumar independente do nível de escolaridade das mães. CONCLUSÕES: As variáveis que explicaram o peso ao nascer dos neonatos de mães com elevada escolaridade foram de natureza biológica, em contraste com os determinantes sociais encontrados no grupo de baixa escolaridade.

Efficiency Measures in the Agricultural Sector: The Beginning

Copyright © 2013 Springer Netherlands.

Animal Grazing System Efficiency

Copyright © 2013 Springer Netherlands.

Azorean Agriculture Efficiency by PAR

Copyright © 2013 Springer Netherlands.

Sustainable Tourism and Agriculture Multifunctionality by PAR: A Variable Selection Approach

Copyright © 2013 Springer Netherlands.

Efficiency Measures in the Agricultural Sector: With Applications

Copyright 2013 Springer Netherlands.

Dimensionless analysis of constrained damping treatments

One of the most effective ways of controlling vibrations in plate or beam structures is by means of constrained viscoelastic damping treatments. Contrary to the unconstrained configuration, the design of constrained and integrated layer damping treatments is multifaceted because the thickness of the viscoelastic layer acts distinctly on the two main counterparts of the strain energy the volume of viscoelastic material and the shear strain field. In this work, a parametric study is performed exploring the effect that the design parameters, namely the thickness/length ratio, constraining layer thickness, material modulus, natural mode and boundary conditions have on these two counterparts and subsequently, on the treatment efficiency. This paper presents five parametric studies, namely, the thickness/length ratio, the constraining layer thickness, material properties, natural mode and boundary conditions. The results obtained evidence an interesting effect when dealing with very thin viscoelastic layers that contradicts the standard treatment efficiency vs. layer thickness relation; hence, the potential optimisation of constrained and integrated viscoelastic treatments through the use of properly designed thin multilayer configurations is justified. This work presents a dimensionless analysis and provides useful general guidelines for the efficient design of constrained and integrated damping treatments based on single or multi-layer configurations. (C) 2012 Elsevier Ltd. All rights reserved.

Implications of the Intervention Program for Physical Activity (IPPA) in the perception of illness and wellbeing in people with Multiple Sclerosis (MS)

The aim of this study is to examine the implications of the IPPA in the perception of illness and wellbeing in MS patients. Methods - This is a quasi experimental study non-randomized study with 24 MS patients diagnosed at least 1 year before, and with an EDSS score of under 7. We used the IPPA in 3 groups of eight people in 3 Portuguese hospitals (Lisbon, Coimbra, and Porto). The sessions were held once a week for 90 minutes, over a period of 7 weeks. The instruments used were: We asked the subjects the question “Please classify the severity of your disease?” and used the Personal Wellbeing Scale (PWS) at the beginning (time A) and end (time B) of the IPPA. We used the SPSS version 20. A non-parametric statistical hypothesis test (Wilcoxon test) was used for the variable analysis. The intervention followed the recommendations of the Helsinki Declaration. Results – The results suggest that there are differences between time A and B, the perception of illness decreased (p<0.08), while wellbeing increased (p<0.01). Conclusions: The IPPA can play an important role in modifying the perception of disease severity and personal wellbeing.

Avaliação de desempenho ambiental da Câmara Municipal da Ribeira Grande (São Miguel, Açores) : água e resíduos

Dissertação de Mestrado em Ambiente, Saúde e Segurança.

Cluster analysis using affinity aoefficient in order to identify religious beliefs profiles

International Scientific Forum, ISF 2013, ISF 2013, 12-14 December 2013, Tirana.

Bullying in hazing pratices : a study on higher education

7 th International Conference of Education, Research and Innovation (ICERI2014 Proceedings), Seville, Spain, 17-19 November 2014.

Classificação de atividades físicas através do uso do acelerómetro do smartphone

Dissertação de natureza científica realizada para a obtenção do grau de Mestre em Engenharia de redes de comunicação e Multimédia

Immunohistochemistry in formalin-gel fixed tissues

There are several hazards in histopathology laboratories and its staff must ensure that their professional activity is set to the highest standards while complying with the best safety procedures. Formalin is one of the chemical hazards to which such professionals are routinely exposed. To decrease this contact, it is suggested that 10% neutral buffered liquid formalin (FL) is replaced by 10% formalin-gel (FG), given the later reduces the likelihood of spills and splashes, and decreased fume levels are released during its handling, proving itself less harmful. However, it is mandatory to assess the effectiveness of FG as a fixative and ensure that the subsequent complementary techniques, such as immunohistochemistry (IHC), are not compromised. Two groups of 30 samples from human placenta have been fixed with FG and FL fixatives during different periods of time (12, 24, and 48 hours) and, thereafter, processed, embedded, and sectioned. IHC for six different antibodies was performed and the results were scored (0–100) using an algorithm that took into account immunostaining intensity, percentage of staining structures, non-specific immunostaining, contrast, and morphological preservation. Parametric and non-parametric statistical tests were used (alpha = 0•05). All results were similar for both fixatives, with global score means of 95•36±6•65 for FL and 96•06±5•80 for FG, and without any statistical difference (P>0•05). The duration of the fixation had no statistical relevance also (P>0•05). So it is proved here FG could be an effective alternative to FL.

Entrepreneurship Education : The role of the Higher Education Institutions in the Entrepreneurial Attitudes of the Students

8th International Conference of Education, Research and Innovation. 18-20 November, 2015, Seville, Spain.