Development and Study of a Non-Destructive Testing System with Terahertz Radiation

Continuous wave terahertz imaging is a variant of terahertz imaging that has been made possible with recent advances in technology and has provided interesting results as an inspection method. This variant is more accessible than its counterparts, as such, there is high interest in studying it. This dissertation aims at providing the foundations for the development and use of this technology for Non-Destructive Testing. The system was assembled and tested for different applications. The fundamental phenomena were studied through experimentation and numerical simulations. A mathematical model was developed to predict the effects of Fabry-Perot interference, a phenomenon that would otherwise be considered undesirable. The comprehension of this effect allows for this method to be used as measuring tool. The system was compared with other non-contact inspection techniques, where it was found to excel at imaging water infiltrations and some composite materials

Collective actions and political behavior: scientific production of brazilian social psychology (1986-2011)

The article aims to analyze the scientific production about collective actions and political behavior written by authors of Brazilian social psychology. The main issue is to analyze how the authors understand the politicization of social relations and the process of building a democratic society. The authors were selected from three sources – Research Groups of the CNPq, Work Groups of the ANPEPP, and Psychology and Society Brazilian Journal – and the papers were analyzed by the perspective of the Plural and Radical Democratic Theory (Ernesto Laclau and Chantal Mouffe). The discussion demonstrates the distance of the articles in relation to the conception of the political based on the articulation between three moments– moment of the articulation, the moment of the contingency, moment of the antagonism – and the implications these distance. Moreover, the discussion suggests the emergence of social psychology in the debate about the political through a resumption of the concept of the hegemony in a non-essentialist perspective

MANIFESTO CONTRA O TRABALHO, INTRODUÇÃO A UMA CRÍTICA ONTOLÓGICO-POLÍTICA

Este trabalho tem por objetivo apresentar uma reflexão sobre as questões levantadas pelo Grupo Krisis a respeito da categoria ontológica de trabalho