From the periphery to the centre: Community engagement and justice in conservation decision making

Conservation nowadays is understood as a broad concept that considers objects as contextual and contingent. The social dimensions of the conservation object, however, have been successively overlooked in most conservation endeavours. Although communities are considered an important stakeholder in conservation decision-making processes, engagement with communities in practice is clearly deficient. The lack of communication with these communities can be understood as a symptom of the overall misrecognition of this peripheral stakeholder that raises questions concerning the justice of the conservation process in its social context. The aim of this paper is to explore how the notion of justice can be applied to conservation decision-making through the example of two performance-based artworks. Finally, a reflective approach that acknowledges the ‘documentation of absence’ is suggested

The aim of documentation: Micro-decisions in the documentation of performance-based artworks

The preservation of performance-based artworks, such as installations and performances, is often accompanied by frequent discussions regarding their documentation. How can performance- based artworks, which are unrepeatable and contextual, be documented after the event? This paper aims to reflect upon the purpose of the documentation of performance-based artworks and about how the micro-decisions conservators make during the documentation process can influence and are influenced by their intentions. In this context, the concepts and practices of documentation are critically examined. With this goal in mind, the artwork Identificación (1975) by the Portuguese artist Manoel Barbosa (b. 1953) and the documentation produced in two different contexts by two different people (a choreographer and a conservator) are discussed

Weighted automata as coalgebras in categories of matrices

The evolution from non-deterministic to weighted automata represents a shift from qual- itative to quantitative methods in computer science. The trend calls for a language able to reconcile quantitative reasoning with formal logic and set theory, which have for so many years supported qualitative reasoning. Such a lingua franca should be typed, poly- morphic, diagrammatic, calculational and easy to blend with conventional notation. This paper puts forward typed linear algebra as a candidate notation for such a unifying role. This notation, which emerges from regarding matrices as morphisms of suitable categories, is put at work in describing weighted automata as coalgebras in such categories. Some attention is paid to the interface between the index-free (categorial) language of matrix algebra and the corresponding index-wise, set-theoretic notation.Fundação para a Ciência e a Tecnologia (FCT

Caracterização de sintomas de deficiências em cedro rosa (Cedrela odorata L.).

Este estudo teve por objetivo caracterizar os sintomas visuais de deficiência de macronutrientes e micronutrientes em mudas de cedro rosa.bitstream/item/24799/1/ct88-cedrorosa.pd

Química da solução de um gleissolo na várzea do rio Solimões - AM.

Nas várzeas da Amazônia Central predominam os Gleissolos. O entendimento da dinâmica dos elementos nesses solos pode auxiliar no planejamento de épocas adequadas para a prática de plantio. O objetivo do presente estudo foi caracterizar a composição química da solução desses solos em área de várzea do rio Solimões no Amazonas. Foram realizadas sete amostragens da solução do solo, entre os meses de fevereiro a maio de 2011, no qual foram mensurados o pH, condutividade elétrica (CE) e os teores de Ca2+, Mg2+, Na+, K+, Al3+, Fe, Mn, Cu, Zn. Os teores de Ca2+, Mg2+, Na+ e K+ foram maiores em 100 cm de profundidade, indicando que há mobilização de elementos por lixiviação. Os baixos valores de Fe e maiores de Mn apontam para dissolução redutiva desse primeiro elemento. A decomposição da matéria orgânica contribui para a liberação de elementos em solução e acidificação para o meio. O pH e a CE são governados pelo aumento da concentração eletrolítica da solução do solo pelo aporte anual contid

Conservação ou Gestão de Mudança: Time-based media no museu

Numa sociedade em tudo dominada pelas tecnologias digitais, as obras adquiridas pelos museus, nos últimos dez anos, incluem naturalmente um número elevado de peças que fazem uso deste tipo de tecnologias. Alguns dos maiores museus de arte contemporânea do mundo, como a Tate, em Londres, o Museum of Modern Art (MoMA) ou o Guggenheim, em Nova Iorque, começaram a constituir os seus departamentos para lidar com as especificidades da conservação deste tipo de obras, a que chamam time-based media art. São consideradas time-based media, as a obras criadas através de práticas e materiais variáveis, com recurso a tecnologias ou formas artísticas que têm como base o tempo. Este tipo de obras tem vindo a colocar desafios com potencial para revolucionar a maneira de pensar a conservação dentro e fora do museu, permitindo novas explorações teóricas e práticas sobre a conservação do património em geral

The effects of a plant proteinase inhibitor from Enterolobium contortisiliquum on human tumor cell lines

Supplementary to the efficient inhibition of trypsin, chymotrypsin, plasma kallikrein, and plasmin already described by the EcTI inhibitor from Enterolobium contortisiliquum, it also blocks human neutrophil elastase (K(iapp)=4.3 nM) and prevents phorbol ester (PMA)-stimulated activation of matrix metalloproteinase (MMP)-2 probably via interference with membrane-type 1 (MT1)-MMP. Moreover, plasminogen-induced activation of proMMP-9 and processing of active MMP-2 was also inhibited. Furthermore, the effect of EcTI on the human cancer cell lines HCT116 and HT29 (colorectal), SkBr-3 and MCF-7 (breast), K562 and THP-1 (leukemia), as well as on human primary fibroblasts and human mesenchymal stem cells (hMSCs) was studied. EcTI inhibited in a concentration range of 1.0-2.5 mu M rather specifically tumor cell viability without targeting primary fibroblasts and hMSCs. Taken together, our data indicate that the polyspecific proteinase inhibitor EcTI prevents proMMP activation and is cytotoxic against tumor cells without affecting normal tissue remodeling fibroblasts or regenerative hMSCs being an important tool in the studies of tumor cell development and dissemination