8,928 research outputs found
Book Review: Women Doing Life: Gender, Punishment and the Struggle for Identity
Lempert, L. B. Women Doing Life: Gender, Punishment and the Struggle for Identity. New York: New York University Press. (2016). $27.00 (paperback), ISBN 9781479827053
Computer-based monitoring platform for renewable energy systems: Four experimental application cases using NI LabVIEW
Sustainability and responsible environmental behaviour constitute a vital premise in the development of the humankind. In fact, during last decades, the global energetic scenario is evolving towards a scheme with increasing relevance of Renewable Energy Sources (RES) like photovoltaic, wind, biomass and hydrogen. Furthermore, hydrogen is an energy carrier which constitutes a mean for long-term energy storage. The integration of hydrogen with local RES contributes to distributed power generation and early introduction of hydrogen economy. Intermittent nature of many of RES, for instance solar and wind sources, impose the development of a management and control strategy to overcome this drawback. This strategy is responsible of providing a reliable, stable and efficient operation of the system. To implement such strategy, a monitoring system is required.The present paper aims to contribute to experimentally validate LabVIEW as valuable tool to develop monitoring platforms in the field of RES-based facilities. To this aim, a set of real systems successfully monitored is exposed.Programa Operativo FEDER de Extremadura 2014-2020) through the grant “Ayuda a Grupos de Investigación” (ref. GR15178) of Junta de Extremadura
Linear partial divided-difference equation satisfied by multivariate orthogonal polynomials on quadratic lattices
In this paper, a fourth-order partial divided-difference equation on
quadratic lattices with polynomial coefficients satisfied by bivariate Racah
polynomials is presented. From this equation we obtain explicitly the matrix
coefficients appearing in the three-term recurrence relations satisfied by any
bivariate orthogonal polynomial solution of the equation. In particular, we
provide explicit expressions for the matrices in the three-term recurrence
relations satisfied by the bivariate Racah polynomials introduced by Tratnik.
Moreover, we present the family of monic bivariate Racah polynomials defined
from the three-term recurrence relations they satisfy, and we solve the
connection problem between two different families of bivariate Racah
polynomials. These results are then applied to other families of bivariate
orthogonal polynomials, namely the bivariate Wilson, continuous dual Hahn and
continuous Hahn, the latter two through limiting processes. The fourth-order
partial divided-difference equations on quadratic lattices are shown to be of
hypergeometric type in the sense that the divided-difference derivatives of
solutions are themselves solution of the same type of divided-difference
equations.Comment: 36 page
Antivivissecção na educação científica : uma proposta didática para a licenciatura em ciências biológicas
No contexto do presente trabalho, o termo vivissecção se refere a experimentos realizados com animais não humanos vivos no ensino visando observação, indução, ou constatação de fenômenos. O principal objetivo foi favorecer, através de uma estratégia didática, a construção de conceitos sobre antivivissecção pelos interlocutores da pesquisa. O trabalho foi desenvolvido durante um curso de formação ministrado a acadêmicos e professores da área de Licenciatura em Ciências Biológicas. O instrumento de coleta de dados consistiu em um questionário com questões abertas e fechadas. Os resultados chamam a atenção sobre a efetividade do planejamento e seleção adequada de recursos para a compreensão de conceitos sobre antivivissecção na Educação Científica. Também fornecem subsídios para se pensar a visão hegemônica utilitarista e especista no Ensino de Ciências
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