Influência da presença de fibras de nylon e de corantes sobre as propriedades da resina acrílica ativada por microondas

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Limits of permutation sequences

A permutation sequence is said to be convergent if the density of occurrences of every fixed permutation in the elements of the sequence converges. We prove that such a convergent sequence has a natural limit object, namely a Lebesgue measurable function $Z:[0,1]^2 \to [0,1]$ with the additional properties that, for every fixed $x \in [0,1]$, the restriction $Z(x,\cdot)$ is a cumulative distribution function and, for every $y \in [0,1]$, the restriction $Z(\cdot,y)$ satisfies a "mass" condition. This limit process is well-behaved: every function in the class of limit objects is a limit of some permutation sequence, and two of these functions are limits of the same sequence if and only if they are equal almost everywhere. An ingredient in the proofs is a new model of random permutations, which generalizes previous models and might be interesting for its own sake.Comment: accepted for publication in the Journal of Combinatorial Theory, Series B. arXiv admin note: text overlap with arXiv:1106.166

Validity in Qualitative Research: A Processual Approach

Validity and reliability of research and its results are important elements to provide evidence of the quality of research in the organizational field. However, validity is better evidenced in quantitative studies than in qualitative research studies. As there is diversity within qualitative research methods and techniques, there is no universally accepted criteria to assess validity in qualitative studies; its usefulness is also questioned. Therefore, in this paper, we argue that qualitative research should adopt a processual view approach of validity since it should not be the product of a single test or just one step in the research. Processual validity both supports good research and helps in its reflection and guidance. To illustrate our approach, we present the processual approach adopted by one of the coauthors during the development of a research project. We highlight the validity assurance activities for both ex ante and ex post research, peer review and participation in an international conference, which corroborated the quality of the processual approach and the results that were obtained

A DIMENSÃO SOCIAL NO ALINHAMENTO ESTRATÉGICO ENTRE NEGÓCIO E TI

Many studies on strategic alignment seek to test models and measure their effectiveness and their impact on organizations. They however fail to understand how the alignment is established and how the social dimension – a set formed by the organizational structure and actors, their relationships and their praxis – is a part of this process. This study adopted scoping literature review as a methodology to analyze, from the perspective of strategy as practice, the social dimension in the strategic alignment process. The purpose was to obtain a research agenda composed by research propositions. The authors hope that these propositions, once subjected to empirical research, contribute to strengthen the understanding of the social dimension in the strategic alignment process from a theoretical and a practical perspective.Muitos estudos sobre alinhamento estratégico buscam testar modelos e mensurar sua efetividade e seu impacto nas organizações. Falham, porém, em compreender como o alinhamento é estabelecido e como a dimensão social - um conjunto formado pela estrutura organizacional e por atores, seus relacionamentos e suas práxis – faz parte desse processo. Este estudo, que adotou uma revisão da literatura do tipo escopo como metodologia, visa analisar, sob a óptica da estratégia enquanto prática, a dimensão social no processo de alinhamento estratégico, com o propósito de obter uma agenda de pesquisa para o campo. Para tanto, a partir de uma revisão sistemática e crítica da literatura relevante sobre o tema, este ensaio tece proposições de pesquisa. Espera-se que estas proposições, uma vez concretizadas em pesquisas empíricas, contribuam para o aprofundamento da compreensão teórica e prática da dimensão social no processo de alinhamento estratégico

Influência da presença de fibras de nylon e de corantes sobre as propriedades da resina acrílica ativada por microondas

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A influência da desinfecção com ácido peracético na rugosidade de uma resina acrílica de uso odontológico

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