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- Atitudes dos adolescentes face à sua sexualidadePublication . Vaz, Ana Maria; Antunes, Maria TeresaIdentificar as atitudes dos adolescentes que frequentam o ensino secundário e analisar a influência das variáveis: sexo, idade, grau de instrução e profissão dos pais, religião, relação estável, informação sobre sexualidade, relações sexuais e utilização de métodos contraceptivos, nessas atitudes. A sexualidade é uma componente fundamental do relacionamento afectivo, referindo-se à maneira como cada um se relaciona consigo próprio e com os outros à procura de afecto (Nodin, 2001) e que influencia a saúde física, mental e o bem estar dos indivíduos (Matos et al., 2003). As propostas de alguns estudos científicos levam a melhor compreendermos as atitudes dos adolescentes face à sua sexualidade, procedendo ao estudo no contexto de uma previsível associação entre diversas variáveis, consideradas determinantes para ajudar a explorar o terreno dos afectos (Canavarro, 1999). METODOLOGIA: Estudo transversal, descritivo-correlacional, utilizando como instrumento de colheita de dados o questionário que inclui variáveis sócio-demográficas e individuais; Inventário Psicossexual de Snyder, Inventário de Personalidade de Eysenck, Inventário de Percepções Juvenis de Streit, versão portuguesa de Fleming (1993) e o Inventário Clínico de Auto-Conceito, de Vaz Serra (1998). A amostra é constituída por 521 estudantes (entre os 15 e os 19 anos), que frequentam a Escola Secundária Amato Lusitano e a Escola Secundária Nuno Álvares, em Castelo Branco, com uma média de idades de 16,37 anos (DP=1,06), em que (46,4%) são do sexo masculino e (53,6%) do sexo feminino.To identify the attitudes of adolescents attending secondary education and analyze the influence of variables: gender, age, degree of parental education and profession, religion, courtship, information about sexuality, sexual intercourse and use of contraception in these attitudes. Sexuality is a fundamental component of the affective relationship, referring to how each one relates to himself and with others when demanding affection (Nodin, 2001) influencing the physical and mental health and well being of individuals (Matos et al., 2003). Proposals from some scientific studies lead to better understand the attitudes of adolescents towards their sexuality, proceeding to the study in the context of an expected association between several variables, considered crucial to help explore the terrain of affections (Canavarro,1999).METHODOLOGY: Transversal descriptive-correlacional study, using the questionnaire as data collection with socio-demographic and individual variables; Psychosexual Inventory of Snyder; Eysenck Personality inventory; Streit Juvenile Perceptions inventory, Portuguese version of Fleming (1993) and the Vaz Serra Self Concept Clinical inventory (1998). The sample consists of 521 students (between 15 and 19 years old) attending secondary education in the city of Castelo Branco (Escola Secundária Amato Lusitano e Escola Secundária Nuno Álvares), with an average age of 16.37 years (DP=1,06), being (46.4%) males and (53.6%) females.
- Soil pollution indexes through the assessment of a compositional baseline - the Langreo case study, SpainPublication . Albuquerque, Maria Teresa; Boente, Carlos; Gallego, José Luís R.; Egozcue, Juan José; Pawlowsky, VeraWhen considering complex scenarios, such as in environmental characterization, where a multiset of attributes must be considered, a dimensional reduction of the problem is mandatory for a clear apprehension of the reality. Maps, broadly mentioned in the literature, are great for spatial pattern visualization of pollutant’s concentration distribution, or to assign areas of contamination enrichment, either if natural or triggered by anthropogenic activities. In the present study, a set of 15 Potentially Toxic Elements - PTEs - (As, Ba, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Sb, Se, Tl, V, and Zn) were analyzed in soils gathered in the Langreo area (80 Km2) —Asturias, Spain— and used (a) to analyze how high concentrations in PTEs are spatially distributed and (b) to explore dissemination trends and the definition of clusters of relative enrichment. To quantify soil pollution, it is important to understand what is meant by pollution-free soil. Often, this background, or pollution baseline, is undefined or only partially known. Given that the concentration of chemical elements is compositional, as the attributes vary together, our approach is based on compositional principles. Finding a balance of pollutant (numerator) over non-pollutant (denominator) elements, aiming sparsity and simplicity as properties, is the key issue for the construction of a Compositional Pollution Index, and two approaches have been explored: (1) taking into account the whole observed composition, and (2) taking into account only a subcomposition, based on expert knowledge, in which the reported elements are: Na, K, Ca, Al, Mg, Fe, Cu, Pb, Zn, As, Sb, Hg. In all tested cases, Sb, Pb, and Hg appear in the numerator of the balance, and K, Al, and Zn in the denominator. A conclusion could be that the overall pollution in the Langreo region is dominated by the content of Sb, Pb, and Hg, relative to the content of K, Al, and Zn. Finally, both indexes went through a stochastic sequential Gaussian simulation. The spatial characterization allowed a broad discussion about not only the concentrations’ spatial distribution and associated uncertainty, but also a better nderstanding of the possibility of trends of relative enrichment and insight in PTEs fate.