“Entrelugares” identificados numa experiência de intercâmbio universitário na Itália

No âmbito do projeto de pesquisa “Elaboração de subsídios teórico-metodológicos para a educação intercultural”, a bolsista IC, estudante de pedagogia (UFSC), realizou um estágio de intercâmbio acadêmico na Universidade italiana Roma Tre e no projeto Aquilone, durante o primeiro semestre de 2007. Buscou compreender o caráter multidimensional e complexo de experiências educativas realizadas na interação entre sujeitos e movimentos sociais de identidades culturais diferentes, de modo a colaborar para a elaboração de referenciais teórico-metodológicos para a Educação Intercultural. A atuação no espaço “inter”, no “entrelugar” entre duas ou mais culturas, particularmente em processos migratórios, permitiu identificar a diferença de enfoque da educação intercultural, entre os países do norte e do sul; a sua eminente importância como mediadora das relações dos imigrantes com os autóctones; a importância da utilização de processos de trocas culturais, interculturais para a desesteriotipização, descolonização cultural e (des)subalternização

Physicochemical characterization of biomaterials commonly used in dentistry as bone substitutes--comparison with human bone

The present work focuses on the physicochemical characterization of selected mineral-based biomaterials that are frequently used in dental applications. The selected materials are commercially available as granules from different biological origins: bovine, porcine, and coralline. Natural and calcined human bone were used for comparison purposes. Besides a classical rationalization of chemical composition and crystallinity, a major emphasis was placed on the measurement of various morphostructural properties such as particle size, porosity, density, and specific surface area. Such properties are crucial to acquiring a full interpretation of the in vivo performance. The studied samples exhibited distinct particle sizes (between 200 and 1000 microm) and shapes. Mercury intrusion revealed not only that the total sample porosity varied considerably (33% for OsteoBiol, 50% for PepGen P-15, and 60% for BioOss) but also that a significant percentage of that porosity corresponded to submicron pores. Biocoral was not analyzed by this technique as it possesses larger pores than those of the porosimeter upper limit. The density values determined for the calcined samples were close to the theoretical values of hydroxyapatite. However, the values for the collagenated samples were lower, in accordance with their lower mineral content. The specific surface areas ranged from less than 1 m(2)/g (Biocoral) up to 60 m(2)/g (BioOss). The chemical and phase composition of most of the samples, the exception being Biocoral (aragonite), were hydroxyapatite based. Nonetheless, the samples exhibited different organic material content as a consequence of the distinct heat treatments that each had received

Stability of Biaxial Nematic Phase for Systems with Variable Molecular Shape Anisotropy

We study the influence of fluctuations in molecular shape on the stability of the biaxial nematic phase by generalizing the mean field model of Mulder and Ruijgrok [Physica A {\bf 113}, 145 (1982)]. We limit ourselves to the case when the molecular shape anisotropy, represented by the alignment tensor, is a random variable of an annealed type. A prototype of such behavior can be found in lyotropic systems - a mixture of potassium laurate, 1-decanol, and $D_2O$, where distribution of the micellar shape adjusts to actual equilibrium conditions. Further examples of materials with the biaxial nematic phase, where molecular shape is subject to fluctuations, are thermotropic materials composed of flexible trimeric- or tetrapod-like molecular units. Our calculations show that the Gaussian equilibrium distribution of the variables describing molecular shape (dispersion force) anisotropy gives rise to new classes of the phase diagrams, absent in the original model. Depending on properties of the shape fluctuations, the stability of the biaxial nematic phase can be either enhanced or depressed, relative to the uniaxial nematic phases. In the former case the splitting of the Landau point into two triple points with a direct phase transition line from isotropic to biaxial phase is observed.Comment: 18 pages containing 6 figure

Wage differentials in domestic work: The impact of contractual arrangements

The regulation of employment relationships dates back to the process of industrialization where workers had dangerous and injurious working conditions. However, pervasive poor conditions, together with a wide range of contractual arrangements, demand additional efforts from national and international institutions. The Employment Relationship Recommendation (Recommendation 198) (ILO 2006) and the Decent Work Agenda, illustrate the International Labor Organization’s (ILO 2002) efforts to guarantee protection of workers’ rights in labor laws and other regulations, including collective agreements. These initiatives also attempt to bring more hidden types of employment relationships under the protection of the law. However, the assessment of the impact of such initiatives is still missing in the literature. Our article attempts to fill this gap and to offer empirical evidence on the role of regulations in the labor market of domestic workers (...)FC

Desconstrução de Subalternidades e Idéias Anarquistas: possíveis convergências à caminho da insubordinação

A pesquisa em desenvolvimento nasceu dentro do projeto “Educação Intercultural: desconstrução de subalternidades em práticas educativas e socioculturais”. Surge da busca por aprofundar a perspectiva da desconstrução de subalternidades relacionando-a com movimentos políticos/sociais de insubordinação. O objetivo é discutir as possíveis convergências entre a opção pela desconstrução de subalternidades e as idéias anarquistas. Parte da desconstrução de subalternidades, enquanto uma perspectiva que leva em conta a complexidade do mundo atual, não acredita ser detentora de uma verdade redentora (Azibeiro) e busca a identificação de entre-lugares viáveis ao dialogo a construção do pensamento fronteiriço. É realizada por meio de pesquisa bibliográfica, análise e identificação dos pressupostos teóricos confluentes. Traz em conta os aportes da desconstrução de subalternidades: colonialidade do poder, eurocentrismo (Quijano), colonialidade-modernidade, diferença colonial, consciência dupla, pensamento fronteiriço (Mignolo) transmodernidade (Dussel), Entre-Lugar (Bhabha). Busca-se: levantar um pouco da história das idéias e movimentos anarquistas (Woodcock); traçar convergências como, por exemplo, a defesa pela desconstrução enquanto um postulado à transformação, à construção (Bakunin); refletir sobre o movimento antiglobalização (Liberato e Klein), sua relação com o surgimento de uma nova utopia, suas possíveis confluências ao manter um viés libertário, uma rebeldia visceral contra toda e qualquer forma de opressão e a autonomia como caminho e fim contribuindo com um horizonte de transformação social

Going Further with Point Pair Features

Point Pair Features is a widely used method to detect 3D objects in point clouds, however they are prone to fail in presence of sensor noise and background clutter. We introduce novel sampling and voting schemes that significantly reduces the influence of clutter and sensor noise. Our experiments show that with our improvements, PPFs become competitive against state-of-the-art methods as it outperforms them on several objects from challenging benchmarks, at a low computational cost.Comment: Corrected post-print of manuscript accepted to the European Conference on Computer Vision (ECCV) 2016; https://link.springer.com/chapter/10.1007/978-3-319-46487-9_5