12,023 research outputs found
Reseña de "Adán en Edén" de Carlos Fuentes
Adán en Edén (Alfaguara, 2009) es el título de la novela más reciente de Carlos Fuentes, donde confluyen, una vez más, los actos humanos descritos en su plena condición, asociados a las prácticas y rituales políticos, en un estilo característico del narrador quien abre con una cita de Milton en Paraíso perdido: “¿Acaso te pedí, Hacedor, que de la arcilla me hicieras hombre, acaso te pedí que de la oscuridad me ascendieras?”. Se trata de la historia de Adán Gorozpe, un hombre de peso cuya posición privilegiada se debe a su habilidad para ascender, primero en el contexto familiar casándose con una mujer de familia “bien” rica, luego conociendo las maniobras —nada morales y sí muy mezquinas— de la política. Como todo hombre con poder, Adan Gorozpe lo ejerce para su conveniencia hasta que aparece otro hombre al cual teme, que corteja a su mujer y, a la vez, le propone una alianza política para llegar a la máxima magistratura; a la presidencia, pues
Reseña de "LA FILOSOFÍA DE LA ILUSTRACIÓN LATINOAMERICANA" de Alberto Saladino García
De distintas maneras el ser humano ha experimentado y sentido el mundo en su devenir histórico. Recordemos que hay un estrecho puente entre lo real y lo imaginario o mítico, pues a falta de mejores explicaciones el hombre sentía una necesidad vital de protección y seguridad, ante una physis inhóspita, inmensa y por momentos violenta. Y tal certeza la fue encontrando en las divinidades que comenzó a mirar por doquier: el Dios Sol, la Diosa Tierra, la Luna entre muchas otras. Es la experiencia sensible que deviene en mito y, posteriormente en cosmovisiones del origen de la Vida y con ella del Hombre. Aún en estos días perviven esos relatos que, a su manera, dan cuenta de las cosas animadas e inanimadas, finitas e infinitas, visibles e invisibles que componen eso que entendemos por mundo y Univers
Quasar-galaxy associations revisited
Gravitational lensing predicts an enhancement of the density of bright,
distant QSOs around foreground galaxies. We measure this QSO-galaxy correlation
w_qg for two complete samples of radio-loud quasars, the southern 1Jy and
Half-Jansky samples. The existence of a positive correlation between z~1
quasars and z~0.15 galaxies is confirmed at a p=99.0% significance level
(>99.9%) if previous measurements on the northern hemisphere are included). A
comparison with the results obtained for incomplete quasar catalogs (e.g. the
Veron-Cetty and Veron compilation) suggests the existence of an `identification
bias', which spuriously increases the estimated amplitude of the quasar-galaxy
correlation for incomplete samples. This effect may explain many of the
surprisingly strong quasar-galaxy associations found in the literature.
Nevertheless, the value of w_qg that we measure in our complete catalogs is
still considerably higher than the predictions from weak lensing. We consider
two effects which could help to explain this discrepancy: galactic dust
extinction and strong lensing.Comment: 9 pages, 6 figures, MNRAS accepte
Cultural Relevance of the Transtheoretical Model in Physical Activity Promotion: Mexican-American Women’s use of the Processes of Change
Hispanic women in the U.S. have disproportionately high rates of obesity and health disparities related to insufficient physical activity (PA). While the Transtheoretical Model (TTM) is one of the most commonly used behavioral theories in interventions promoting PA, there is a lack of evidence to support the cultural relevance of theoretical constructs for increasing PA in Hispanic women. To learn about Hispanic women’s use and interpretation of the construct Processes of Change (POC) for increasing PA, we conducted focus groups with overweight/obese Mexican/Mexican-American females (N=13) ages 27-40 years. Major themes centered on the importance of children and family caretaking, social support, and PA to promote weight loss. Participants identified strategies they use to enact the POC for increasing PA such as retos (challenges), exercise as an alternative to eating, and clothing as a reward/reminder for PA. This study examined culture-specific factors used by Mexican-American women for becoming more physically active as they correspond to the theoretical constructs of the TTM. We showed that the POC examined in our study are culturally relevant and enacted by Mexican-American women for increasing PA, and are poised to be deployed in culturally appropriate PA promotion and weight loss interventions
Desarrollo, educación y pobreza en México
Este trabajo analiza el desarrollo, la educación y la pobreza en México, por la íntima correlación existente entre ellos. El desarrollo implica acceso a beneficios básicos, como educación, alimentos, servicios de salud, vivienda, empleo y una justa distribución de los ingresos; la educación es el conjunto de acciones e influencias institucionales cuyo fin es cultivar y desarrollar en el individuo aptitudes, conocimientos, competencias, actitudes y comportamientos, lo que permite el despliegue de las capacidades que tienen que ver con la autonomía y libertad de hombres y mujeres; por último, la pobreza, amén de la carencia y exclusión que contiene, es una negación de oportunidades y opciones para dicho desarrollo, lo cual limita las capacidades personales
Branching rate expansion around annihilating random walks
We present some exact results for branching and annihilating random walks. We
compute the nonuniversal threshold value of the annihilation rate for having a
phase transition in the simplest reaction-diffusion system belonging to the
directed percolation universality class. Also, we show that the accepted
scenario for the appearance of a phase transition in the parity conserving
universality class must be improved. In order to obtain these results we
perform an expansion in the branching rate around pure annihilation, a theory
without branching. This expansion is possible because we manage to solve pure
annihilation exactly in any dimension.Comment: 5 pages, 5 figure
Multipartite Entangled Spatial Modes of Ultracold Atoms Generated and Controlled by Quantum Measurement
We show that the effect of measurement back-action results in the generation
of multiple many-body spatial modes of ultracold atoms trapped in an optical
lattice, when scattered light is detected. The multipartite mode entanglement
properties and their nontrivial spatial overlap can be varied by tuning the
optical geometry in a single setup. This can be used to engineer quantum states
and dynamics of matter fields. We provide examples of multimode generalizations
of parametric down-conversion, Dicke, and other states, investigate the
entanglement properties of such states, and show how they can be transformed
into a class of generalized squeezed states. Further, we propose how these
modes can be used to detect and measure entanglement in quantum gases.Comment: 6 Pages, 3 Figures, Supplemental Material include
R-Band Imaging of Fields Around 1<z<2 Radiogalaxies
We have taken deep -band images of fields around five radiogalaxies:
0956+47, 1217+36, 3C256, 3C324 and 3C294 with . 0956+47 is found to
show a double nucleus. Our data on 1217+36 suggest the revision of its
classification as a radiogalaxy. We found a statistically significant excess of
bright () galaxies on scales of 2 arcmin around the radiogalaxies
(which have ) in our sample. The excess has been determined
empirically to be at level. It is remarkable that this excess
is not present for galaxies within the same area, suggesting that
the excess is not physically associated to the galaxies but due to intervening
groups and then related to gravitational lensing.Comment: 20 pages, uuencoded compressed PostScript including tables. Figures
available upon request. To appear in the March 1995 issue of The Astronomical
Journa
- …