The cardinal and the idempotent number of various monoids of transformations on a finite chain

Bulletin of the Malaysian Mathematical Sciences Society, 2, 34 (1),(2011), p. 79–85

A CMOS variable width short-pulse generator circuit for UWB RADAR applications

IEEE International Symposium on Circuits and Systems, pp. 2713 – 2716, Seattle, EUA

The computational role of short-term plasticity and the balance of excitation and inhibition in neural microcircuits: experimental and theoretical analysis

The computations performed by the brain ultimately rely on the functional connectivity between neurons embedded in complex networks. It is well known that the neuronal connections, the synapses, are plastic, i.e. the contribution of each presynaptic neuron to the firing of a postsynaptic neuron can be independently adjusted. The modulation of effective synaptic strength can occur on time scales that range from tens or hundreds of milliseconds, to tens of minutes or hours, to days, and may involve pre- and/or post-synaptic modifications. The collection of these mechanisms is generally believed to underlie learning and memory and, hence, it is fundamental to understand their consequences in the behavior of neurons.(...)

A avaliação das barreiras na actividade profissional da pessoa com deficiência visual em Portugal: validação e adaptação do WES (work experience survey)

Resumo: Este estudo tem como finalidade validar e adaptar o WES (Work Experience Survey), de forma a avaliar e caracterizar a percepção que as pessoas DV portuguesas possuem sobre as barreiras ao emprego e as suas formas de resolução e/ou minimização. Da revisão da literatura, constatou-se a inexistência, a nível nacional, de estudos que versassem sobre as barreiras no acesso e manutenção de emprego e estratégias de superação. Este motivo foi o ponto a partir do qual se elaborou a adaptação e validação do questionário WES e a partir do qual alcançamos resultados e conclusões que nos remetem para evidências que a seguir se descrevem. Os dados recolhidos demonstram que esta faixa da população: tem baixos níveis de escolaridade; necessita de aperfeiçoar as suas competências para se tornar mais competitiva no mercado de trabalho; tem dificuldades na acessibilidade ao meio físico, devido às condições de acessibilidade oferecidas; enfrenta problemas no desempenho laboral, devido à falta de tecnologias de apoio e de meios de superação das barreiras no local de trabalho; e sente-se discriminada no acesso e manutenção do emprego, e progressão na carreira. A exploração das razões do insucesso escolar e do perfil de competências adequado, exigíveis para o emprego; o desenvolvimento de planos de promoção da carreira; a divulgação das competências e capacidades dos trabalhadores DV e a averiguação na aplicação da legislação referente à acessibilidade são algumas sugestões apresentadas.

The visual image in Epiphanic Short History

The visual image is a fundamental component of epiphany, stressing its immediacy and vividness, corresponding to the enargeia of the traditional ekphrasis and also playing with cultural and social meanings. Morris Beja in his seminal book Epiphany in the Modern Novel, draws our attention to the distinction made by Joyce between the epiphany originated in a common object, in a discourse or gesture and the one arising in “a memorable phase of the mind itself”. This type materializes in the “dream-epiphany” and in the epiphany based in memory. On the other hand, Robert Langbaum in his study of the epiphanic mode, suggests that the category of “visionary epiphany” could account for the modern effect of an internally glowing vision like Blake’s “The Tyger”, which projects the vitality of a real tyger. The short story, whose length renders it a fitting genre for the use of different types of epiphany, has dealt with the impact of the visual image in this technique, to convey different effects and different aesthetic aims. This paper will present some examples of this occurrence in short stories of authors in whose work epiphany is a fundamental concept and literary technique: Walter Pater, Joseph Conrad, K. Mansfield, Clarice Lispector. Pater’s “imaginary portraits” concentrate on “priviledged moments” of the lives of the characters depicting their impressions through pictorial language; Conrad tries to show “moments of awakening” that can be remembered by the eye; Mansfield suggests that epiphany, the “glimpse”, should replace plot as an internal ordering principle of her impressionist short-stories; in C. Lispector the visualization of some situations is so aggressive that it causes nausea and a radical revelation on the protagonist’s.

Structural change: a brief review

This is a short summary of some aspects of structural change models, and is not intended to be comprehensive survey or review. Many important works have been left out. Also, the presentation was not intended to be rigorous nor general. It’s main purpose is only to focus on some recent developments in this area and motivate the reader to learn more.

Dealing with frame imperfections in a business survey: an empirical study using without replacement bootstrap

This paper approaches issues related to frame problems and nonresponse in surveys. These nonsampling errors affect the accuracy of the estimates whereas the estimators became biased and less precise. We analyse some estimation methods that deal with those problems and give an especial focus to post-stratification procedures.

Caracterização dos níveis de atividade física das pessoas com 75 ou mais anos e a sua relação com a auto-perceção de saúde e a dor

RESUMO: A atividade física (AF) surge como uma estratégia constante no combate aos efeitos nefastos do envelhecimento e nesse sentido, surgem recomendações, mundialmente aceites, de que os idosos deverão realizar pelo menos 150 minutos de atividade moderada por semana, aumentar as atividades ligeiras e reduzir os comportamentos sedentários (ACSM, 2010). Contudo não sabemos se os idosos cumprem ou não estas recomendações e ao que corresponde objetivamente aumentar os níveis de atividade ligeira e diminuir os comportamentos sedentários: que proporção ocupam ou deverão ocupar na vida dos idosos? Os benefícios da AF são vastos e amplamente aceites, nomeadamente ao nível da melhoria da autoperceção de saúde (ApS) e redução da dor, no entanto, desconhece-se a relação existente entre o nível de AF e estas variáveis e o estudo desta relação revela-se de extrema importância tendo em conta o seu impacto na funcionalidade, bem-estar e qualidade de vida do idoso. Objetivo: Caracterizar os níveis de AF e os comportamentos sedentários de indivíduos com mais de 75 anos e analisar a sua relação com a auto-perceção de saúde e a dor. Metodologia: Trata-se de um estudo descritivo de correlação, com uma amostra constituída por 66 participantes, com média de idade de 80.1 (±3.83) anos. As variáveis em estudo foram o nível de AF, os comportamentos sedentários, a ApS e a dor. Foi aplicado um protocolo de avaliação, constituído por um questionário de caracterização sociodemográfica e do nível de AF, o Yale Física Activity Survey (YPAS), o MOS Short-Form Health Survey (SF-12) e a Escala Numérica de Dor. Resultados: Os resultados revelaram que os participantes despendiam em média 50% do seu tempo semanal em comportamentos sedentários; 38.5% em atividades ligeiras e 480.23 minutos, ou seja, 11%, em atividades moderadas. Verificou-se uma relação positiva e estatisticamente significativa entre a ApS geral e a quantidade de AF moderada (Rs=0.490,p=0.000), o gasto total energético semanal (Rs=0.231, p=0.031), a pontuação de caminhada (Rs=0.422, p=0.000) e a pontuação de movimento (Rs=0.313, p=0.005); uma associação negativa, estatisticamente significativa, entre a dor e a pontuação de posição de pé (Rs=-0.305,p=0.006); e entre a pontuação de posição de sentado do YPAS e a ApS geral (Rs=-0.342,p=0.003). Conclusões: Os resultados sugerem que os participantes ocupavam metade da sua semana em comportamentos sedentários, contudo em termos da quantidade de AF moderada vão de encontro aos mínimos propostos pelas guidelines internacionais para se obter benefícios de saúde. No entanto, a distribuição, quer em termos de intensidade como de frequência, destas atividades ao longo da semana poderá não ser a mais adequada. O presente estudo aponta ainda para a existência de uma relação positiva entre o nível de AF e a ApS, ou seja, na nossa amostra um maior nível de AF estava associado a uma melhor ApS; uma relação negativa entre o nível de AF e a dor, um maior nível de AF estava também associado a uma menor intensidade de dor; e uma relação negativa entre os comportamentos sedentários e a ApS, ou seja, na amostra de utentes, com mais de 75 anos, em estudo, um score mais elevado de comportamentos sedentários estava associado a uma pior ApS.---------ABSTRACT: Background: Physical activity (PA) has been widely pointed as an answer to overcome aging’s negative impact. In this sense, recommendations have arise supporting that older adults should perform, at least, 150 minutes of moderate intensity PA per week, increase their light intensity PA and decrease sedentary behaviours (ACSM, 2010). Nevertheless, it is unclear whether older adults reach these recommendations or not and, also, what exactly means to increase light intensity PA and to reduce sedentary behaviours: which proportion they fill or should fill in older adults life? PA’s benefits are extensive and widely accepted, namely improvements in self-related health (SRH) and pain reduction, however, the relation between these variables and PA level and sedentary behaviours is still unknown, and we find it extremely important to clarify the nature of this relation considering its impact on older adults functional level, wellbeing and quality of life. Purpose: Characterize older adults, over 75 years old, PA levels and sedentary behaviours and to investigate its relation to self-rated health and pain. Methods: We conducted a descriptive-correlational study, with a geographic convenience sample of 66 participants with a mean age of 80.1 (±3.83) years. Our study variables were PA level, sedentary behaviours, SRH and pain. We applied an assessment protocol, including a socio-demographic and PA level questionnaire, Yale Physical Activity Survey (YPAS), MOS Short-Form Health Survey (SF-12) and Numeric Pain Scale. Results: Revealed that participants spent an average of 50% of their total weekly time in sedentary behaviours; 38.5% in light intensity PA; and 480.23 minutes per week, meaning 11.04%, in moderate intensity PA. We encountered a positive relation, with statistical significance, between global SRH and moderate intensity PA amount (Rs=0.490, p=0.000), total energy expenditure (Rs=0.231, p=0.031), walking score (Rs=0.422, p=0.000) and movement score (Rs=0.313, p=0.005); a negative association, with statistical significance, between pain and standing score (Rs=-0.305, p=0.006); and between sitting score and global SRH (Rs=-0.342,p=0.003). Conclusions: Our results unveil that the subjects in our sample spent half of their week in sedentary behaviours, nonetheless they met moderate intensity PA recommendations to obtain health benefits. However, activities distribution, regarding both its intensity and frequency, throughout the week might not be the most appropriate. This study points towards the existence of a positive relation between PA level and SRH, meaning that, in our sample, a higher PA level was associated to a better SRH; a negative relation between PA level and pain, i.e. a higher PA level was associated to less pain; and a negative relation between sedentary behaviours and SRH, meaning that a higher sitting score was associated to a worse SRH, in the sample of older adults over 75 years in study.

Medium-short-term and repetition effects of advergames on children consumer behaviour

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics

Evaluating the potential benefits and challenges of lean construction adoption in the portuguese construction industry: a survey study

Proceedings IGLC-18, July 2010, Technion, Haifa, Israel

Mansfield and Lewis: impressionism and vorticism in the short story

The affinities of the short story with the style of painting dominating the period in which it is produced have often been debated by critics. The effects of the application of impressionist and vorticist principles in painting turns out differently in Katherine Mansfield and Wyndham Lewis’ short stories structure and strategies, according to their conceptions of Art and Life and to his career as a painter.

Native american women in sherman Alexie's short stories: stereotypical representations

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Línguas, Literaturas e Culturas

Corporate finance in general equilibrium models with incomplete markets: A survey

A Masters Thesis, presented as part of the requirements for the award of a Research Masters Degree in Economics from NOVA – School of Business and Economics

Machine learning Gaussian short rate

Dissertação para obtenção do Grau de Doutor em Estatística e Gestão do Risco

Molecular regulation of secondary gorwth: searching for SHORT-ROOT function in cork formation

The analysis of molecular regulators involved in controlling the maintenance and function of plant meristems has been the subject of many studies. Some master regulators of these processes have been identified in Arabidopsis benefiting from the array of tools available for genetic and molecular analysis in this model plant. However, aspects such as secondary growth that are more extensively observed in woody plants, have been less studied. Secondary growth is responsible for the enlargement of the plant stems and roots and results from the activity of the lateral (secondary) meristems, vascular cambium and cork cambium (phellogen), which produce two important renewable natural resources, wood and cork, respectively.(...)