Absolute Calibration of a 200 MeV Proton Polarimeter for Use with the Brookhaven Linac

This work was supported by the National Science Foundation Grant NSF PHY 81-14339 and by Indiana Universit

O ‘Darwinismo Social’ Perante a Questão da Assistência

Tendo como referência o quadro de miséria/ pauperismo do século XIX, o propósito crítico deste ensaio é a influência da teoria darwinista na questão social. Após um breve enquadramento dessas reflexões, no quadro da problemática da pobreza, a ênfase é colocada no pensamento de Herbert Spencer que advogava os aspectos positivos da pobreza enquanto instrumento de selecção dos menos capazes. O que está em causa, para o autor deste artigo, é demonstrar como esses mesmos argumentos spencerianos emergiram em defesa de um posicionamento crítico no quadro de qualquer tipo de intervenção assistencial. / In the context of the 19th century framework of misery/pauperism, the critical purpose of this article is the influence of the Darwinian theory on the social question. After a brief framing of those reflections, the emphasis is placed on the thought of Herbert Spencer about what he considered the positive aspects of poverty as a selection instrument of the less capable. What is at question, for the author of this article, is to demonstrate how the Spencerian thought on poverty defend, in fact, a critical position in the field of any kind of assistance intervention

Transport Phenomena in Alcator C-Mod H-Modes

Abstract. Several interesting new results have come from studies of ICRF-heated, H-mode plasmas in Alcator C-Mod. Dimensionless scaling studies have found gyro-Bohm-like transport similar to that reported on other devices; however, the dependence on collisionality was surprisingly strong, with BE −1. Despite high edge temperatures and strong edge pressure gradients, type I edge-localized modes (ELMs) are not observed in C-Mod. Instead we obtain a regime that we have dubbed enhanced D (EDA) which is accompanied by high-frequency density fluctuations. For all H-modes, core gradients were found to increase linearly with edge temperature, suggesting the importance of critical gradient/marginal stability behaviour. Comparisons with the IFS-PPPL model have begun, showing quantitative agreement in some cases. Impurity particle transport was studied via the laser blow-off technique with impurity confinement found to be effectively infinite for ELM-free discharges but reduced into the range 0.1–0.2 s for the EDA plasmas. 1

Design and User Satisfaction of Interactive Maps for Visually Impaired People

Multimodal interactive maps are a solution for presenting spatial information to visually impaired people. In this paper, we present an interactive multimodal map prototype that is based on a tactile paper map, a multi-touch screen and audio output. We first describe the different steps for designing an interactive map: drawing and printing the tactile paper map, choice of multi-touch technology, interaction technologies and the software architecture. Then we describe the method used to assess user satisfaction. We provide data showing that an interactive map - although based on a unique, elementary, double tap interaction - has been met with a high level of user satisfaction. Interestingly, satisfaction is independent of a user's age, previous visual experience or Braille experience. This prototype will be used as a platform to design advanced interactions for spatial learning

Controlled transport of solitons and bubbles using external perturbations

We investigate generalized soliton-bearing systems in the presence of external perturbations. We show the possibility of the transport of solitons using external waves, provided the waveform and its velocity satisfy certain conditions. We also investigate the stabilization and transport of bubbles using external perturbations in 3D-systems. We also present the results of real experiments with laser-induced vapor bubbles in liquids.Comment: 26 pages, 24 figure