Lévi-Strauss no Brasil: a formação do etnólogo

O artigo procura acompanhar o período brasileiro de Claude Lévi-Strauss (1935-1938), rastreando suas publicações, aulas e pesquisas no momento em que era professor de sociologia na Universidade de São Paulo, com o objetivo de compreender o lugar ocupado pelo Brasil na sua trajetória. O interesse é mostrar que apesar de breve, e de modo geral silenciada, a etapa brasileira do autor foi fundamental para os desdobramentos de sua futura carreira como etnólogo e americanista. O texto procura também avaliar o significado da vinda de Lévi-Strauss para o Brasil no contexto francês da época, quando o americanismo era ainda terreno pouco explorado, ao contrário do africanismo, "vocação" em voga no momento

TFOS DEWS II Tear Film Report

The members of the Tear Film Subcommittee reviewed the role of the tear film in dry eye disease (DED). The Subcommittee reviewed biophysical and biochemical aspects of tears and how these change in DED. Clinically, DED is characterized by loss of tear volume, more rapid breakup of the tear film and increased evaporation of tears from the ocular surface. The tear film is composed of many substances including lipids, proteins, mucins and electrolytes. All of these contribute to the integrity of the tear film but exactly how they interact is still an area of active research. Tear film osmolarity increases in DED. Changes to other components such as proteins and mucins can be used as biomarkers for DED. The Subcommittee recommended areas for future research to advance our understanding of the tear film and how this changes with DED. The final report was written after review by all Subcommittee members and the entire TFOS DEWS II membership. (C) 2017 Elsevier Inc. All rights reserved.Peer reviewe

Operation and performance of the ATLAS semiconductor tracker in LHC Run 2

Abstract The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules. During Run 2 (2015–2018) the Large Hadron Collider delivered an integrated luminosity of 156 fb-1 to the ATLAS experiment at a centre-of-mass proton-proton collision energy of 13 TeV. The instantaneous luminosity and pile-up conditions were far in excess of those assumed in the original design of the SCT detector. Due to improvements to the data acquisition system, the SCT operated stably throughout Run 2. It was available for 99.9% of the integrated luminosity and achieved a data-quality efficiency of 99.85%. Detailed studies have been made of the leakage current in SCT modules and the evolution of the full depletion voltage, which are used to study the impact of radiation damage to the modules.</jats:p