Bilingüismo en la comunidad coreana en la Argentina : análisis de las transferencias en niños de cuatro a trece años.

Esta investigación intenta contribuir a una mejor comprensión de esta comunidad de inmigrantes coreanos en la República Argentina, sobre la que apenas existe información etnográfica, histórica, sociolingüística y lingüística disponible.. Se realiza un estudio sociolingüístico de la comunidad coreana en Buenos Aires centrada en los patrones de uso de las lenguas empleadas dentro del grupo de niños de cuatro a trece años.. Este trabajo pretende hacer un estudio del español que manejan los niños de cuatro a trece años pertenecientes a la comunidad mencionada. Aunque la mayoría de los participantes de la muestra son bilingües del español y el coreano, el trabajo se realiza desde el español, no solamente porque esta lengua es de uso mayoritario en Argentina, sino porque el objetivo del estudio es predecir y confirmar las transferencia que se observan en el español debido a la situación de bilingüismo y biculturalismo de estos niños..

La enseñanza de la historia para la construcción nacional argentina (1853-1955).

El artículo forma parte de un monográfico de la revista dedicado a conmemoraciones iberoamericanas y enseñanza de la historia.- Resumen tomado parcialmente de la revista

El pasado reciente en la escuela : an??lisis y reflexiones a prop??sito de las representaciones estudiantiles de la ??ltima dictadura militar argentina

El art??culo forma parte de una secci??n de la revista dedicada a experiencias de aula.- Resumen tomado parcialmente de la publicaci??n.

La guerra de los Treinta Años (1914-1945) : la contribución de los campos de batalla en [sic] la formación de una identidad cultural europea.

El artículo forma parte de un monográfico dedicado a la incidencia de lo europeo en el aprendizaje de las ciencias sociales

Entrevista : Jesús Cimas Lozano : la familia y el centro deben ser convergentes.

Título facticio

La educación ambiental y las políticas educativas nacionales y globales para el nuevo bachillerato (2000-2011)

La función social de la educación, como sistema es asegurar que la sociedad se apropie y reproduzaca la cultura dominante. Pero la educación constituye a la vez, la herramienta imprescindible para promover la transformación social. A partir de estas premisas, el presente trabajo reflexiona respecto de la función social asignada a la educación ambiental en la construcción de las comprensiones individuales y sociales de las relaciones sociedad-naturaleza-desarrollo. Esta investigación educativa apunta a ensayar respuestas a la pregunta ¿De qué manera la educación ambiental, asumida como política educativa en el bachillerato, contribuiría a transformar las relaciones sociedad- naturalezadesarrollo en el contexto de la Constitución 2008, aportando a la sociedad del buen vivir? La tesis desarrolla tres capítulos. El primero realiza un acercamiento cronológico, reflexivo y crítico a las políticas educativas globales, de enfoque antropocéntrico, que emergen de Cumbres internacionales sobre el desarrollo y que asignan a la educación ambiental la tarea de formar conciencia ambiental para lograr desarrollo sostenible. El segundo refleja la fuerza de dichas políticas en la orientación de las políticas educativas del país y devela la progresiva ubicación de la educación ambiental en las fronteras de las propuestas curriculares del sistema educativo. El tercero reflexiona respecto de las implicaciones para la función social de la educación ambiental, frente al referente ideológico biocentrista de la Constitución 2008, en el contexto de una reforma curricular al bachillerato que no muestra correspondencia con el nuevo referente teórico constitucional respecto de las relaciones sociedad-naturaleza-desarrollo. La reflexión de estos tres elementos configura un contexto para formular conclusiones y recomendaciones que apuntan a la necesidad de recuperar la educación ambiental en el bachillerato, y recoge elementos para fortalecer desde ésta, la sociedad del Buen Vivir.

Advanced functionality for radio analysis in the Offline software framework of the Pierre Auger Observatory

The advent of the Auger Engineering Radio Array (AERA) necessitates the development of a powerful framework for the analysis of radio measurements of cosmic ray air showers. As AERA performs ""radio-hybrid"" measurements of air shower radio emission in coincidence with the surface particle detectors and fluorescence telescopes of the Pierre Auger Observatory, the radio analysis functionality had to be incorporated in the existing hybrid analysis solutions for fluorescence and surface detector data. This goal has been achieved in a natural way by extending the existing Auger Offline software framework with radio functionality. In this article, we lay out the design, highlights and features of the radio extension implemented in the Auger Offline framework. Its functionality has achieved a high degree of sophistication and offers advanced features such as vectorial reconstruction of the electric field, advanced signal processing algorithms, a transparent and efficient handling of FFTs, a very detailed simulation of detector effects, and the read-in of multiple data formats including data from various radio simulation codes. The source code of this radio functionality can be made available to interested parties on request. (C) 2011 Elsevier B.V. All rights reserved.

Trigger and aperture of the surface detector array of the Pierre Auger Observatory

The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real events and the rejection of random coincidences. Such trigger makes the surface detector array fully efficient for the detection of EAS with energy above 3 x 10(18) eV, for all zenith angles between 0 degrees and 60 degrees, independently of the position of the impact point and of the mass of the primary particle. In these range of energies and angles, the exposure of the surface array can be determined purely on the basis of the geometrical acceptance. (C) 2009 Elsevier B.V. All rights reserved.

Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger observatory

Atmospheric parameters, Such as pressure (P), temperature (T) and density (rho proportional to P/T), affect the development of extensive air showers initiated by energetic cosmic rays. We have Studied the impact of atmospheric variations on extensive air showers by means of the surface detector of the Pierre Auger Observatory. The rate of events shows a similar to 10% seasonal modulation and similar to 2% diurnal one. We find that the observed behaviour is explained by a model including the effects associated with the variations of P and rho. The former affects the longitudinal development of air showers while the latter influences the Moliere radius and hence the lateral distribution of the shower particles. The model is validated with full simulations of extensive air showers using atmospheric profiles measured at the site of the Pierre Auger Observatory. (C) 2009 Elsevier B.V. All rights reserved.

Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory

From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV equivalent to 10(18) eV), respectively. These are the first experimental limits on ultra-high energy photons at energies below 10 EeV. The results complement previous constraints on top-down models from array data and they reduce systematic uncertainties in the interpretation of shower data in terms of primary flux, nuclear composition and proton-air cross-section. (C) 2009 Elsevier B.V. All rights reserved.

Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory

We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 x 10(17) eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% C.L. for EeV energies. We also compare our results to those of previous experiments as well as with some theoretical expectations. (C) 2011 Elsevier B.V. All rights reserved.

The Pierre Auger Observatory scaler mode for the study of solar activity modulation of galactic cosmic rays

Since data-taking began in January 2004, the Pierre Auger Observatory has been recording the count rates of low energy secondary cosmic ray particles for the self-calibration of the ground detectors of its surface detector array. After correcting for atmospheric effects, modulations of galactic cosmic rays due to solar activity and transient events are observed. Temporal variations related with the activity of the heliosphere can be determined with high accuracy due to the high total count rates. In this study, the available data are presented together with an analysis focused on the observation of Forbush decreases, where a strong correlation with neutron monitor data is found.

The exposure of the hybrid detector of the Pierre Auger Observatory

The Pierre Auger Observatory is a detector for ultra-high energy cosmic rays. It consists of a surface array to measure secondary particles at ground level and a fluorescence detector to measure the development of air showers in the atmosphere above the array. The ""hybrid"" detection mode combines the information from the two subsystems. We describe the determination of the hybrid exposure for events observed by the fluorescence telescopes in coincidence with at least one water-Cherenkov detector of the surface array. A detailed knowledge of the time dependence of the detection operations is crucial for an accurate evaluation of the exposure. We discuss the relevance of monitoring data collected during operations, such as the status of the fluorescence detector, background light and atmospheric conditions, that are used in both simulation and reconstruction. (C) 2010 Elsevier B.V. All rights reserved.

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuz`min energy threshold, 6 x 10(19) eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1 degrees from the position of an active galactic nucleus within 75 Mpc (using the Veron-Cetty and Veron 12th catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy threshold through 31 December 2009. The number of arrival directions has increased from 27 to 69, allowing a more precise measurement. The correlating fraction is (38(-6)(+7))%, compared with 21% expected for isotropic cosmic rays. This is down from the early estimate of (69-(+11)(13))%. The enlarged set of arrival directions is examined also in relation to other populations of nearby extragalactic objects: galaxies in the 2 Microns All Sky Survey and active galactic nuclei detected in hard X-rays by the Swift Burst Alert Telescope. A celestial region around the position of the radiogalaxy Cen A has the largest excess of arrival directions relative to isotropic expectations. The 2-point autocorrelation function is shown for the enlarged set of arrival directions and compared to the isotropic expectation. (C) 2010 Elsevier B.V. All rights reserved.