Examining the accumulated oxygen deficit method in breaststroke swimming

The present study investigated the accumulated oxygen deficit (AOD) method in breaststroke swimming with the aims to assess the reliability of the oxygen uptake/swimming velocity regression line and to quantify the precision of the AOD. Sixteen male swimmers performed two swimming tests in different days, with a 24-h recovery between tests: a graded swimming test and an all-out test. The all-out test was performed in one of two distances: 100 m (n = 7) or 200 m (n = 9). Through all testing, expired gases were collected breath by breath and analysed with a K4b2 Gas Analyser (Cosmed, Rome, Italy) connected to an AquaTrainer Valve (Cosmed, Rome, Italy). The standard error of the regression lines was approximately 5-6 ml kg(-1) min(-1) and the regressions allowed an extrapolation of the energy cost to higher intensities with a standard error of the predicted value that was lower in the 200-m bout (approximately 3.5 ml kg(-1) min(-1)) comparatively to the 100-m bout (approximately 6 ml kg(-1) min(-1)). The AOD imprecision was calculated as the square root of the sum of the oxygen uptake measurement error and the standard error of the predicted value for energy cost. AOD imprecision was smaller in the 200-m bout (approximately 9 ml kg(-1) min(-1)) comparatively to the 100-m bout (approximately 12 ml kg(-1) min(-1)). However, since the AOD values during the two distances were small, the AOD relative errors can be viewed as high. Additionally, the data variability was considerable (95% confidence intervals of the linear extrapolation larger than 20 ml kg(-1) min(-1)).info:eu-repo/semantics/publishedVersio

Stresse ocupacional em forças de segurança: um estudo comparativo

Este trabalho compara a experiência de stresse ocupacional em dois grupos de segurança portugueses, um a exercer em contexto público (n=95) e outro em contexto prisional (n=237). Para tal, utilizámos um protocolo de avaliação com medidas do stresse global, “burnout”, comprometimento organizacional, satisfação com a vida, satisfação profissional e desejo de abandonar a profissão. Os indicadores de fidelidade e validade dos instrumentos foram muito aceitáveis. Os resultados de “burnout” por dimensão apontaram níveis apreciáveis de exaustão emocional (valores a oscilar entre os 12% e os 26%), seguidos do cinismo (valores entre 8% e 21%) e do baixo sentimento de eficácia profissional (valores entre 3% e 8%) (apenas um participante registou valores de “burnout” nas três dimensões, em simultâneo). A análise comparativa entre os grupos demonstrou que os profissionais de segurança prisional evidenciaram experiências profissionais mais negativas (e.g., maiores níveis de “burnout” e desejo de abandonar a profissão e menores níveis de comprometimento organizacional, satisfação com a vida e satisfação profissional). No final, os autores discutem os factores que podem ajudar a perceber estas diferenças e possíveis implicações para a investigação futura.(undefined

Into the Daylight

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Quartz use in the absence of flint: Middle and Upper Palaeolithic raw material economy in the C^oa Valley (North-eastern Portugal)

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Connecting neuroscience principles and education people profile of culture and leadership: a labour market approach

Neurosciences, based on the founding idea of “neuroplasticity”, have helped to clarify the issue of initial (and integral) training of individuals based on the balanced structuring of the respective brain system. From what has been said, we would say that initial parental education, in times of an increasingly urban life (where parents delegate the education of children to school) does not seem to facilitate this balance of integrated development. It is important to discuss the connection between the neurosciences and education, concluding that this joint approach would be essential to guide quality levels and the researchers admit that the applicability of neuroscience research, for the improvement of pedagogy, has been, paradoxically, very limited. In general, we can define organizational culture as a set of beliefs, values and norms that influence the climate of a company, aligning employee behaviour and the strategic way in which the company positions itself in the market. Organizational culture is the essence of an organization. The supportive culture or clan culture presents a pleasant work environment, with a united organization that endures through loyalty and traditions, where interpersonal relationships are created, success is defended by teamwork, participation and consensus between employees and the organization. Leaders are considered mentors and there is a high level of commitment. In accordance with the updated works of Miranda, which seeks to reconcile the previous author and the OCAI model of R. Quinn and collaborators, a questionnaire was constructed, with twenty-eight questions, involving as many others adjectives that characterize a cognitive profile. In a first approximation, and taking only the descriptive statistics data into account, and taking only the sample data, there is a striking curiosity: the respondent students consider that the school made a visible and verifiable effort to correct the dominant profile. limbic pointing to a right cortical profile: intuition, entrepreneurship, vision.info:eu-repo/semantics/publishedVersio

"National frozen fish distributor”: paradigmatic case study of an african company for operational productivity improvement

This paper develops a case study regarding the intervention requested by the leader of the Mozambican company "DNPC" (to consolidate the leadership and management of the company, in the context of the transition to the situation of a large company). In terms of diagnosis, there are four aspects that emerge as the most salient of this business initiative: (i) the differentiation of the company in relation to the commercial orientation of the company in order to respond to the most basic needs of the poor population (provide the supply of frozen fish); (ii) the traditional African culture centred on "affections", with the perverse effect of inducing a very high absenteeism of drivers, which would, in turn, make the flow of supply from popular markets unfeasible; (iii) the response to the initial chaos by the development of a business culture in an entrepreneurial network, both internally (drivers) and externally (sales companies and security elements of the financial flows generated); (iv) promotion of an organization of work based on a meaning based on autonomy and liberation from the hierarchical submission of the worker, and designed not to force him to exclusion from society and to move away from traditional African values.info:eu-repo/semantics/publishedVersio

E depois do Paleolítico, o que fizeram ali? Notícia sobre as ocupações holocénicas do sítio da Cardina (Santa Comba, Vila Nova de Foz Côa)

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Des Gravures Paléolithiques Enfouies Sous Des Niveaux Archéologiques

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Descoberta de duas novas rochas no núcleo de arte rupestre da Penascosa

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