Theoretical investigation on transverse mode combustion instability for liquid propellant rockets

Mathematical solution of nonlinear transverse combustion instability problems in thin annular liquid propellant rocket chamber

Operating a full tungsten actively cooled tokamak: overview of WEST first phase of operation

WEST is an MA class superconducting, actively cooled, full tungsten (W) tokamak, designed to operate in long pulses up to 1000 s. In support of ITER operation and DEMO conceptual activities, key missions of WEST are: (i) qualification of high heat flux plasma-facing components in integrating both technological and physics aspects in relevant heat and particle exhaust conditions, particularly for the tungsten monoblocks foreseen in ITER divertor; (ii) integrated steady-state operation at high confinement, with a focus on power exhaust issues. During the phase 1 of operation (2017–2020), a set of actively cooled ITER-grade plasma facing unit prototypes was integrated into the inertially cooled W coated startup lower divertor. Up to 8.8 MW of RF power has been coupled to the plasma and divertor heat flux of up to 6 MW m−2 were reached. Long pulse operation was started, using the upper actively cooled divertor, with a discharge of about 1 min achieved. This paper gives an overview of the results achieved in phase 1. Perspectives for phase 2, operating with the full capability of the device with the complete ITER-grade actively cooled lower divertor, are also described

Design thinking and social enterprise innovation

Might design thinking assist social enterprises to be more innovative? Social enterprises trade to benefit society, yet they are vulnerable due to the contradictory imperatives of social and business goals. It is essential social enterprises address important societal questions if they are to be effective in their mission, but little is known about how social enterprises design their work, or if design thinking might assist their capacity to innovate. This paper reports preliminary findings of an Australian study exploring the relationship between design thinking and social enterprise innovation. It argues that employing design thinking to problem solve might assist social enterprises to be innovative and address important questions, both of which have long term implications for policy and practice

Conteúdos lúdicos, expressivos e artísticos na educação formal Playful, expressive and artistic content in formal education

A prática de atividades lúdicas ou o incentivo ao fluir expressivo e artístico são propostas que permeiam a Educação, desde a Antiguidade Clássica. Atualmente, a necessidade premente de atentar para a inclusão contextualizada dessas práticas, vem sendo convalidada pelas diretrizes propostas pelos Parâmetros Curriculares tanto das disciplinas de Educação Física, como da Educação Artística. Entretanto esse espaço, ainda sutil, merece enfoque mais incisivo, por meio de estudos mais aprofundados acompanhados de práticas direcionadas que convalidem sua relevância. Assim, este estudo, de natureza qualitativa, objetivou investigar se essas variáveis estão disponíveis dentro dos conteúdos disseminados pelos professores e se possuem um espaço destinado ou não dentro da Educação formal. Para tanto, foi realizado um estudo exploratório com trinta professores voluntários, de ambos os sexos, pesquisados in loco, com consentimento livre e esclarecido, das disciplinas de Educação Física e Artística, utilizando como instrumento, para a coleta de dados, um questionário com perguntas mistas. Os dados foram analisados descritivamente, indicando que é possível notar a presença do lúdico e da arte, em ambas as disciplinas; mediando os processos de aprendizagem. Além disso, que os professores utilizam amplamente desses recursos, no entanto, nem sempre, de forma consciente e contextualizada, e que, apesar da implantação dos parâmetros curriculares desde 1998, esse espaço ainda não está consolidado.<br>The practices of playing activities or the incentive to the flow of artistic expression are proposals related to education, since classical antiquity. Nowadays, the crying needs to consider the contextual inclusion of these practices have been consolidated by the proposed plans for curricular standard, either in the subjects Physical Education or Arts. However, this space, tenuous, deserves a more incisive focus, by deep studies accompanied by directed practices which consolidate its importance. So, this study, of a qualitative nature, aimed to investigate if these variables are available within the disseminated contents by the teachers, and if they have or not a specific space within formal education. So, an exploratory study was accomplished with thirty volunteer teachers, both, male and female, researched in loco, free consented, in the subjects of Physical Education and Arts, and in order to collect the data needed, it was used a questionnaire with assorted questions. The data were analyzed in a descriptive way, indicating that it is possible to find the playing activities and art, in both subjects, mediating the learning processes. Besides, it was observed that the teachers widely use these resources, however, not always in a conscious and contextual way, and in spite of the introduction of the National Curricular Parameters since 1998, this space isn't consolidated yet

SEAFP, Safety and Environmental Assessment of Fusion Power, Final Report

The Safety and Environmental Assessment of Fusion Power (SEAFP) was undertaken for the Commission of the European Union in the framework of the Fusion Programme 1990-94. Its terms of reference were in accordance with the programme decision of the Council of Ministers which followed a request by the European Parliament and a recommendation of the Fusion Programme Evaluation Board. The SEAFP is part of an ongoing effort to consider the safety and environmental aspects of fusion power. SEAFP was carried out by the NET Team, the Euratom/UKAEA Association, and by Industry, with contributions from other Associated Laboratories, the Joint Research Centre and the Canadian fusion programme