989 resultados para 686
Resumo:
Por muchos años la lucha por la igualdad de las mujeres centró sus esfuerzos en problemáticas como la violencia contra las mujeres, los derechos humanos de las mujeres, la participación social y política de género y los derechos sexuales y reproductivos. Es indudablemente que a través de estas luchas se alcanzaron conquistas en el ámbito legislativo y en las políticas públicas, además del reconocimiento social sobre las desigualdades existentes, aspectos que el Estado, por iniciativa propia, jamás los hubiera reconocido. Sin embargo estos cambios demandan procesos que sobrepasen los temas antes aludidos; ahora, corresponde a las mujeres debatir temas económicos, de integración económica y los demás problemas estructurales de la sociedad, desde una perspectiva distinta a la tradicional; estos son los actuales desafíos de los movimientos de mujeres.
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Presenta las reseñas de los siguientes libros: Robert Cooter y Thomas Ulen, DERECHO Y ECONOMÍA, México, Fondo de Cultura Económica, 2002, segunda reimpresión, 686 pp. -- Robert Cooter, Ugo Mattei, Pier Giuseppe Monateri, Roberto Pardolesi, Thomas Ulen, Il. MERCATO DELLE REGOLE, ANALISI ECONÓMICA DEL DIRITTO CIVILE, Bologna, II Mulino, 2001, 488 pp. -- Diego Valadés, PROBLEMAS CONSTITUCIONALES DEL ESTADO DE DERECHO, Buenos Aires, Astrea, 2004, segunda edición, 157 pp. -- Instituto Interamericano de Derechos Humanos / Centro para la Justicia y el Derecho Internacional, Los DERECHOS HUMANOS DE LAS MUJERES: FORTALECIENDO SU PROMOCIÓN Y PROTECCIÓN INTERNACIONAL, San José, IIDH, 2004, 203 pp. -- Carlo Guamieri y Patrizia Pederzoli, LOS JUECES y LA POLÍTICA. PODER JUDICIAL y DEMOCRACIA, trad. Miguel Ángel Ruis de Azua, Madrid, Taurus, 1999, 209 pp.
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Cuando la tarea de promover la interculturalidad pasa a manos del Estado, se corre cierto peligro porque los propósitos e intenciones estatales no necesariamente se corresponden con los inicialmente concebidos por las organizaciones y pueblos en sus demandas. A partir de esta premisa, la autora estudia la dimensión política de dos experiencias educativas: por un lado, el CEFOA Fermín Vallejos, de Raqaypampa, Cochabamba, Bolivia, proceso educativo propio de la organización campesina indígena CSURCIR, institucionalizado dentro de la educación oficial de ese país, y, por otro, la Escuela de Formación de Mujeres Líderes Dolores Cacuango, de Quito, Ecuador, que trabaja al margen del sistema educativo ecuatoriano, e investiga cómo intentan “interculturalizar” estas experiencias desde sus programas educativos; qué enseñanza transmiten y a qué dificultades se enfrentan como proceso propio institucionalizado, la una, y como proceso propio que funciona al margen del Estado, la otra. La educación desde los pueblos indígenas aún sigue constituyéndose en una herramienta social-comunal. El CEFOA -que en cuyo caminar existen tensiones por factores como la colonialidad del poder, el saber y el ser- y la Escuela Dolores Cacuango -desde la diferencia- trabajan sus propios procesos de resistencia como mecanismo para alcanzar una sociedad plural.
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The mortality (7 and 14 d), weight change (7 and 14 d), and metal uptake of Eisenia fetida (Savigny, 1826) kept in Pb(NO3)(2)-treated Kettering loam soil in single- and multiple-occupancy (10 earthworms) test containers were determined. The number of earthworms to dry mass (g) ratio of soil was 1:50 in both sets of test containers. Lead concentrations were in the nominal range of 0 to 10,000 mg Pb/kg soil (mg/kg hereafter). Levels of mortality at a given concentration were statistically identical between the single- and multiple-occupancy tests, except at 1,800 mg/kg, at which significantly (p less than or equal to 0.05) more mortality occurred in the multiple-occupancy tests. Death of individual earthworms in the multiple-occupancy tests did not trigger death of the other earthworms in that soil. The LC50 values (concentration statistically likely to kill 50% of the population) were identical between the multiple- and single-occupancy soils: 2,662 mg/kg (2,598-2,984, 7 d) and 2,589 mg/kg (2,251-3,013, 14 d) for the multiple-occupancy soils and 2,827 mg/kg (2,443-3,168, both 7 and 14 d) for the single-occupancy soils (values in brackets represent the 95% confidence intervals). Data were insufficient to calculate the concentration statistically likely to reduce individual earthworm mass by 50% (EC50), but after 14 d, the decrease in earthworm weight in the 1,800 and 3,000 mg/kg tests was significantly greater in the multiple- than in the single-occupancy soils. At 1,000, 1,800, and 3,000 mg/kg tests, earthworm Pb tissue concentration was significantly (p less than or equal to 0.05) greater in earthworms from the multiple-occupancy soils. The presence of earthworms increased the NH3 content of the soil; earthworm mortality increased NH3 concentrations further but not to toxic levels.
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We give an overview on the development of "horizontal" European Committee for Standardisation (CEN) standards for characterising soils, sludges and biowaste in the context of environmental legislation in the European Union (EU). We discuss the various steps in the development of a horizontal standard (i.e. assessment of the possibility of such a standard, review of existing normative documents, pre-normative testing and validation) and related problems. We also provide a synopsis of European and international standards covered by the so-called Project HORIZONTAL. (C) 2004 Elsevier Ltd. All rights reserved.
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Development research has responded to a number of charges over the past few decades. For example, when traditional research was accused of being 'top-down', the response was participatory research, linking the 'receptors' to the generators of research. As participatory processes were recognised as producing limited outcomes, the demand-led agenda was born. In response to the alleged failure of research to deliver its products, the 'joined-up' model, which links research with the private sector, has become popular. However, using examples from animal-health research, this article demonstrates that all the aforementioned approaches are seriously limited in their attempts to generate outputs to address the multi-faceted problems facing the poor. The article outlines a new approach to research: the Mosaic Model. By combining different knowledge forms, and focusing on existing gaps, the model aims to bridge basic and applied findings to enhance the efficiency and value of research, past, present, and future.
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This tutorial review revisits the subject of the seminal book written by Sidney Benson in 1968. A short summary of the nature of the subject is presented, including its place in the wider world of quantitative chemistry. A number of themes are selected to illustrate its previous and continuing usefulness in evaluating numerical values of important quantities, and probing ideas of reaction mechanism. These include strain enthalpies for biradical combination, chain reactions, why some reactions don't occur and the involvement of carbenes in hydrocarbon rearrangements.
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Chronic fish oil intervention had been shown to have a positive impact on endothelial function. Although high-fat meals have often been associated with a loss of postprandial vascular reactivity, studies examining the effects of fish oil fatty acids on vascular function in the postprandial phase are limited. The aim of the present study was to examine the impact of the addition of fish oil fatty acids to a standard test meal on postprandial vascular reactivity. A total of 25 men received in a random order either a placebo oil meal (40 g of mixed fat; fatty acid profile representative of the U.K. diet) or a fish oil meal (31 g of mixed fat and 9 g of fish oil) on two occasions. Vascular reactivity was measured at baseline (0 h) and 4 h after the meal by laser Doppler iontophoresis, and blood samples were taken for the measurement of plasma lipids, total nitrite, glucose and insulin. eNOS (endothelial NO synthase) and NADPH oxidase gene expression were determined in endothelial cells after incubation with TRLs (triacylglycerol-rich lipoproteins) isolated from the plasma samples taken at 4 h. Compared with baseline, sodium nitroprusside (an endothelium-independent vasodilator)-induced reactivity (P = 0.024) and plasma nitrite levels (P = 0.001) were increased after the fish oil meal. In endothelial cells, postprandial TRLs isolated after the fish oil meal increased eNOS and decreased NADPH oxidase gene expression compared with TRLs isolated following the placebo oil meal (P <= 0.03). In conclusion, meal fatty acids appear to be an important determinant of vascular reactivity, with fish oils significantly improving postprandial endothelium-independent vasodilation.
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Pattern separation is a new technique in digital learning networks which can be used to detect state conflicts. This letter describes pattern separation in a simple single-layer network, and an application of the technique in networks with feedback.
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A time-dependent climate-change experiment with a coupled ocean–atmosphere general circulation model has been used to study changes in the occurrence of drought in summer in southern Europe and central North America. In both regions, precipitation and soil moisture are reduced in a climate of greater atmospheric carbon dioxide. A detailed investigation of the hydrology of the model shows that the drying of the soil comes about through an increase in evaporation in winter and spring, caused by higher temperatures and reduced snow cover, and a decrease in the net input of water in summer. Evaporation is reduced in summer because of the drier soil, but the reduction in precipitation is larger. Three extreme statistics are used to define drought, namely the frequency of low summer precipitation, the occurrence of long dry spells, and the probability of dry soil. The last of these is arguably of the greatest practical importance, but since it is based on soil moisture, of which there are very few observations, the authors’ simulation of it has the least confidence. Furthermore, long time series for daily observed precipitation are not readily available from a sufficient number of stations to enable a thorough evaluation of the model simulation, especially for the frequency of long dry spells, and this increases the systematic uncertainty of the model predictions. All three drought statistics show marked increases owing to the sensitivity of extreme statistics to changes in their distributions. However, the greater likelihood of long dry spells is caused by a tendency in the character of daily rainfall toward fewer events, rather than by the reduction in mean precipitation. The results should not be taken as firm predictions because extreme statistics for small regions cannot be calculated reliably from the output of the current generation of GCMs, but they point to the possibility of large increases in the severity of drought conditions as a consequence of climate change caused by increased CO2.
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The molecular structure of trans-[PtCl(CHCH2)(PEt2Ph)2] has been determined by X-ray diffraction methods. The crystals are orthorhombic, space group Pbcn, with a= 10.686(2), b= 13.832(4), c= 16.129(4)Å, and Z= 4. The structure has been solved by the heavy-atom method and refined by full-matrix least squares to R 0.044 for 1 420 diffractometric intensity data. The crystals contain discrete molecules in which the platinum co-ordination is square planar. The Pt–Cl bond vector coincides with a crystallographic diad axis about which the atoms of the vinyl group are disordered. Selected bond lengths (Å) are Pt–Cl 2.398(4), Pt–P 2.295(3), and Pt–C 2.03(2). The Pt–CC angle is 127(2)°. From a survey of the available structural data it is concluded that there is little, if any, back donation from platinum to carbon in platinum–alkenyl linkages.
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The distinction between a Puritan ‘plain’ and a Laudian ‘metaphysical’ preaching style rests on secular rhetorical theories of persuasion that are relatively unimportant to early Stuart homiletics but are central to later Latitudinarian polemics on preaching. Instead, the ‘English Reformed’ theory and method of sermon composition rests on the didactic function of preaching and the need for the Holy Spirit and hearers to co-operate with the preacher. Although Andrewes and some avant-garde conformists questioned this theory, they developed no alternative method of composition. Arguments made in the 1650s for direct inspiration by the Spirit contributed to the decline of both theory and method