Calvet de Magalhães e o Direito à educação

O artigo Direito à educação, de Calvet de Magalhães, foi publicado em Fevereiro de 1974 para celebrar os 25 anos da Declaração Universal dos Direitos do Homem. Pela sua actualidade, pelas referências teóricas a que recorre, pela revisão de literatura e de legislação e pela visão democrática da educação, núcleo central do artigo, justifica-se a sua publicação Para além da perspectiva pedagógica do autor, aqui claramente explicitada, e das suas concepções filosóficas, enquadradas entre o socialismo utópico e o socialismo científico, o artigo exprime uma antevisão do modelo de sociedade que o 25 de Abril de 1974 possibilitou. No que diz respeito à democratização do ensino, Calvet de Magalhães considera que constitui o grande fundamento para o desenvolvimento económico e para elevar o nível cultural da população. Afirma, assim, que a verdadeira democratização do ensino consiste, fundamentalmente, em “assegurar o lugar que convém a cada um e não o acolhimento, sem controlo, nas escolas casernas ou, melhor ainda, nos armazéns de jovens. Neste sentido, a democratização não pode ser somente seleccionar, tem também de produzir “alunos que triunfem”; para isso, considera fundamental que o professor tenha um perfil que garanta um modelo democrático de ensino. Numa época em que se discute o Estatuto da Carreira Docente, em que se conflituam modelos pedagógicos e em que se apresentam diferentes filosofias para a resolução dos problemas da educação, este artigo de Calvet de Magalhães é de leitura obrigatória para todos aqueles que, directa ou indirectamente, estão envolvidos no processo educativo.

Francesc Renart i Arús (1783-1853) i els orígens del teatre català vuitcentista

Estudi sobre l'obra dramàtica de Francesc Renart, inventari i inicis del sainet costumista català del Vuit-cents.

Lettre ecrite a Mr. Calvet, conseiller medecin du Roy ... avec des observations sur la maladie de Marseille /

Mode of access: Internet.

Studies of the Antiproliferative Activity of Ruthenium (II) Cyclopentadienyl-Derived Complexes with Nitrogen Coordinated Ligands

Four cationic ruthenium(II) complexes with the formula [Ru(eta(5)-C5H5)(PPh3)(2)](+), with L = 5-phenyl-1H-tetrazole (TzH) 1, imidazole (ImH) 2, benzo[1,2-b; 4,3-b'] dithio-phen-2-carbonitrile (Bzt) 3, and [5-(2-thiophen-2-yl)-vinyl]-thiophene-2-carbonitrile] (Tvt) 4 were prepared and characterized in view to evaluate their potentialities as antitumor agents. Studies by Circular Dichroism indicated changes in the secondary structure of ct-DNA. Changes in the tertiary structure of pBR322 plasmid DNA were also observed in gel electrophoresis experiment and the images obtained by atomic force microscopy (AFM) suggest strong interaction with pBR322 plasmid DNA; the observed decreasing of the viscosity with time indicates that the complexes do not intercalate between DNA base pairs. Compounds 1, 2, and 3 showed much higher cytotoxicity than the cisplatin against human leukaemia cancer cells (HL-60 cells).

ENCOURAGE architecture: support for heterogeneous smart grids

Our society relies on energy for most of its activities. One application domain inciding heavily on the energy budget regards the energy consumption in residential and non-residential buildings. The ever increasing needs for energy, resulting from the industrialization of developing countries and from the limited scalability of the traditional technologies for energy production, raises both problems and opportunities. The problems are related to the devastating effects of the greenhouse gases produced by the burning of oil and gas for energy production, and from the dependence of whole countries on companies providing gas and oil. The opportunities are mostly technological, since novel markets are opening for both energy production via renewable sources, and for innovations that can rationalize energy usage. An enticing research effort can be the mixing of these two aspects, by leveraging on ICT technologies to rationalize energy production, acquisition, and consumption. The ENCOURAGE project aims to develop embedded intelligence and integration technologies that will directly optimize energy use in buildings and enable active participation in the future smart grid environment.The primary application domains targeted by the ENCOURAGE project are non-residential buildings (e.g.: campuses) and residential buildings (e.g.: neighborhoods). The goal of the project is to achieve 20% of energy savings through the improved interoperability between various types of energy generation, consumption and storage devices; interbuilding energy exchange; and systematic performance monitoring.

New iron(II) cyclopentadienyl derivative complexes: synthesis and antitumor activity against human leucemia cancer cells

A new family of "Fe-II(eta(5)-C5H5)" half sandwich compounds bearing a N-heteroaromatic ligand coordinated to the iron center by a nitrile functional group has been synthesized and fully characterized by NMR and UV-Vis spectroscopy. X-ray analysis of single crystal was achieved for complexes 1 and 3, which crystallized in the monoclinic P2(1)/c and monoclinic P2(1)/n space groups, respectively. Studies of interaction of these five new complexes with plasmid pBR322 DNA by atomic force microscopy showed very strong and different types of interaction. Antiproliferative tests were examined on human leukemia cancer cells (HL-60) using the MTT assay, and the IC50 values revealed excellent antiproliferative activity compared to cisplatin. (C) 2014 Elsevier B.V. All rights reserved.

Efectes de l'hàbit tabàquic sobre la termoregulació durant l'activitat f��sica

El fumar cigarretes, a un ritme habitual i sense evitar el seu consum les hores prèvies a l’activitat f��sica, pot comprometre de forma significativa els mecanismes termoreguladors de pèrdua de calor i provocar una resposta hemodinàmica anormal durant l’exercici. L’associació de tabac i activitat f��sica d’alta intensitat pot fer augmentar la temperatura central al pertorbar els mecanismes de pèrdua de calor mitjançant la redistribució del flux vascular cutani. A més, durant exercicis perllongats com els exercicis de resistència, i en ambients alorosos, el consum de cigarretes pot actuar com a factor limitant en el rendiment esportiu, i incrementar el risc d’hipertèrmia.

Efectes de l'abstinència tabàquica sobre la termoregulació durant l'activitat f��sica

La situació de fumador actiu 1 hora abans de la pràctica d’activitat f��sica pot alterar la resposta termoreguladora, comprometen de forma significativa els mecanismes vasodilatadors cutànis de pèrdua de calor i provocar una resposta hemodinàmica anormal durant l’exercici. L’efecte additiu de la nicotina i de l’activitat f��sica d’alta intensitat pot fer augmentar la temperatura central al pertorbar els mecanismes de pèrdua de calor mitjançant la redistribució del flux vascular cutani. A més, durant exercicis perllongats com els exercicis de resistència, i en ambients calorosos, el consum actiu de cigarretes podria actuar com a factor limitant en el rendiment esportiu, i poder incrementar el risc d’induir hipertèrmia.