8,301 research outputs found
Tomasso Campanella: ¿escolástico o renacentista?
_A partir de una revisión de las ideas de Tomasso Campanella, autor de La ciudad del sol, en este ensayo se argumenta en favor de que el proyecto utópico de este hombre del Renacimiento contiene más rasgos escolásticos y teocráticos que renacentistas
A marker suitable for sex-typing birds from degraded samples
A new primer set was developed for sex-typing
birds, Z37B. This primer set was designed to amplify alleles
of small size to render it suitable for sex-typing degraded
samples, including shed feathers. This marker
successfully sex-typed 50 % of the species tested, including
passerines, shorebirds, rails, seabirds, eagles and the
brown kiwi Apteryx australis (allele size range
=81–103 bp), and is therefore expected to be suitable for
sex-typing a wide range of species. Z37B sex-typed nondegraded
samples (blood), degraded tissue (dead unhatched
embryos, dead nestlings and museum specimens) and
samples of low quantity DNA (plucked feathers and buccal
swabs). The small amplicon sizes in birds suggest that this
marker will be of utility for sex-typing feathers, swabs and
degraded samples from a wide range of avian species
Arte, Feminismo y Tecnología. Reflexiones sobre formas creativas y formas de domesticación
In this article about art, technology and feminism, I assert the role of writings and modes of doing in relation to discourses, as well as the coherence of that position in every femi-nist critical practice against logocentrism. The text, based on a revision and modification of part of the chapter «Teclear» of my essay (h)adas. Mujeres que crean, programan, prosumen, teclean (2013), is based on a critical and proposing analysis of some of the most usual feminist modes of doing of feminist art practice, and argues the interest of that cre-ative practice in technology and networks, emphasising the power of the choices not only of media, but of the creative forms against implicit tendencies -although almost always in-visible- toward domestication; the power of the resistance exercises, infiltration, subver-sion and critical appropriation against the repetion of worlds.En este artículo sobre arte, tecnología y feminismo reivindico el papel de las escrituras y formas de hacer en relación a los discursos, así como la coherencia de dicho posicionamien-to en todo ejercicio crítico del feminismo frente al logocentrismo. El texto apoyado en la revisión y modificación de parte del capítulo «Teclear» de mi ensayo (h)adas. Mujeres que crean, programan, prosumen, teclean (2013), se apoya en el análisis crítico y propositivo de algunos de los más habituales «modos de hacer» de la práctica artística feminista y argu-menta el interés de dicha práctica creativa por la tecnología y las redes, enfatizando el po-der de las elecciones no ya de los medios, sino de las formas creativas frente a las tenden-cias implícitas, y casi siempre invisibles, a la domesticación; el poder de los ejercicios de resistencia, infiltración, subversión y apropiación crítica frente a la repetición de mundos
Geographical determinants of the creation of manufacturing firms: The regions of Spain
The complexity of the mechanisms determining the entry and exit of firms increases when geographical differences in production structure, human capital and unemployment are considered. Inter-reginal variations in the rate of the new firms start-ups within each industrial activity persist through long periods of time, a circumstance that indicates that there are non-conjunctural determinants to the capacity of regions to create new industrial projects. This study is concerned with establishing the influence o geographical variables on the setting up of new manufacturing establishments. The manufacturing industries (NACE R-25) in the Spanish regions (NUTS-2) have been taken as the units of analysis for the period 1980-1992.spanish regions, industrial dynamics, geographical determinants, firm start-ups
Income distribution in the Latin American Southern Cone during the first globalization boom, ca: 1870-1920
Latin America is the most unequal region in the world and there is a lively
debate concerning the explanations and timing of such high levels of income
inequality. Latin America was also the region, not including European Offshoots,
which experienced the most rapid growth during the first globalization boom. It
can, therefore, be taken as an interesting case study for how globalization
forces impinged on growth and income distribution in peripheral regions. This
paper presents a first estimate of income inequality in the Southern Cone of
South America (Brazil 1872 and 1920, Chile 1870 and 1920, Uruguay 1920)
and some assumptions concerning Argentina (1870 and 1920), and Uruguay
(1870). We find an increasing inequality trend between 1870 and 1920 which
can be explained as a process of inequality both within individual countries and
between countries. This trend is discussed along three lines: the relation
between inequality and per capita income levels; the dynamics of the expansion
to new areas, and movements of relative factor prices and of the terms of trade
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Numerical Simulation of Baroclinic Jovian Vortices
We examine the evolution of baroclinic vortices in a time-dependent, nonlinear numerical model of a Jovian atmosphere. The model uses a normal-mode expansion in the vertical, using the barotropic and first two baroclinic modes. Results for the stability of baroclinic vortices on an f plane in the absence of a mean zonal flow are similar to results of Earth vortex models, although the presence of a fluid interior on the Jovian planets shifts the stability boundaries to smaller length scales. The presence of a barotropic mean zonal flow in the interior stabilizes vortices against instability and significantly modifies the finite amplitude form of baroclinic instabilities. The effect of a zonal flow on a form of barotropic instability produces periodic oscillations in the latitude and longitude of the vortex as observed at the level of the cloud tops. This instability may explain some, but not all, observations of longitudinal oscillations of vortices on the outer planets. Oscillations in aspect ratio and orientation of stable vortices in a zonal shear flow are observed in this baroclinic model, as in simpler twodimensional models. Such oscillations are also observed in the atmospheres of Jupiter and Neptune. The meridional propagation and decay of vortices on a β plane is inhibited by the presence of a mean zonal flow. The direction of propagation of a vortex relative to the mean zonal flow depends upon the sign of the meridional potential vorticity gradient; combined with observations of vortex drift rates, this may provide a constraint on model assumption for the flow in the deep interior of the Jovian planets
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