Suchergebnisse

El problema de la inserción y/o consolidación de las mujeres en la ciencia ha sido muy estudiado. Sin embargo, el debate pareciera no avanzar sobre el problema de la experiencia simbólica de las mujeres en la ciencia con un menor tratamiento empírico. El presente texto, utilizando un instrumento que busca comprender si existen patrones de homofilia de género en un grupo diverso de científicos chilenos. Es decir, busca revelar si las personas que se dedican a la ciencia tienen una tendencia a mencionar a otros como sus referentes sólo si cumplen alguna condición -en este caso, de género- que sea similar a la suya. Los resultados muestran una clara tendencia en la forma en que las personas que se dedican a la ciencia evalúan la influencia de otros en función de su homofilia de género. Este factor interviniente puede estar jugando un rol clave en la reproducción de las desigualdades y asimetrías constitutivas del campo científico chileno.

This article analyzes the Spanish audiovisual essay through a sample of 200 titles. Film essay is considered here as a means of expression and generation of thought whose characteristics perfectly reflect the fluidity of the contemporary condition. A study tool has been created with a threefold aim: to identify a corpus of representative works and authors of the Spanish audiovisual essay, to determine and classify the different essayistic trends according to their formal and thematic options and to deliver a productive contribution to the definition of the essay film. The results provide quantitative and qualitative data that reveal an atomized, authorial production, with predominance of short and medium duration films and with a wide thematic and formal diversity. The essay is revealed as an audiovisual form that articulates a line of thought and has some of the following features: it is self-reflective and asystematic; it presents a tendency towards subjectivity but can also take a stand on matters of public interest; it moves away from the more conventional audiovisual forms and engages with the viewer in an intellectual and emotionally active relationship. We found evidence of the political, social and aesthetic dimension of the essay film, as well as a tendency towards documentary and experimental forms. ; Esta investigación estudia el ensayo audiovisual español mediante una muestra de 200 títulos. Partimos de la consideración del ensayo como un medio de expresión y generación de pensamiento cuyas características reflejan perfectamente la fluidez de la condición contemporánea. Se ha creado una herramienta de estudio con un triple objetivo: identificar un corpus de autores y obras representativos de la producción ensayística audiovisual española, determinar y clasificar las distintas tendencias ensayísticas en función de sus opciones formales y temáticas y contribuir a la definición de las características del ensayo audiovisual. Los resultados aportan datos cuantitativos y cualitativos que revelan una producción atomizada, muy autoral, con predominio de trabajos de corta y media duración y con una amplia diversidad temática y formal. El ensayo se revela como una forma de escritura audiovisual capaz de articular una línea de pensamiento y que posee algunos de los siguientes rasgos: es autorreflexivo y asistemático; presenta una tendencia hacia la subjetividad, pero también se posiciona sobre asuntos de interés público; se aleja de las formas más convencionales del audiovisual y entabla con el espectador una relación intelectual y emocionalmente activa. Se evidencia la dimensión política, social y estética del ensayo, así como su tendencia hacia formas documentales y experimentales.

We present a multiwavelength study of the flat-spectrum radio quasar CTA 102 during 2013-2017. We use radio-to-optical data obtained by the Whole Earth Blazar Telescope, 15 GHz data from the Owens Valley Radio Observatory, 91 and 103 GHz data from the Atacama Large Millimeter Array, near-infrared data from the Rapid Eye Monitor telescope, as well as data from the Swift (optical-UV and X-rays) and Fermi (γ -rays) satellites to study flux and spectral variability and the correlation between flux changes at different wavelengths. Unprecedented γ -ray flaring activity was observed during 2016 November-2017 February, with four major outbursts. A peak flux of (2158 ± 63) × 10−8 ph cm−2 s−1, corresponding to a luminosity of (2.2 ± 0.1) × 1050 erg s−1, was reached on 2016 December 28. These four γ -ray outbursts have corresponding events in the near-infrared, optical, and UV bands, with the peaks observed at the same time. A general agreement between X-ray and γ -ray activity is found. The γ -ray flux variations show a general, strong correlation with the optical ones with no time lag between the two bands and a comparable variability amplitude. This γ -ray/optical relationship is in agreement with the geometrical model that has successfully explained the low-energy flux and spectral behaviour, suggesting that the long-term flux variations are mainly due to changes in the Doppler factor produced by variations of the viewing angle of the emitting regions. The difference in behaviour between radio and higher energy emission would be ascribed to different viewing angles of the jet regions producing their emission. © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society ; The data collected by the WEBT collaboration are stored in the WEBT archive at the Osservatorio Astrofisico di Torino INAF (http://www.oato.inaf.it/blazars/webt/); for questions regarding their availability, contact the WEBT President Massimo Villata(massimo.villata@inaf.it).We acknowledge financial contribution from the agreementASI-INAFn. 2017-14-H.0 and from the contract PRIN-SKA-CTA-INAF 2016. This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants DN 08-1/2016, DN 18-13/2017, and KP-06-H28/3 (2018). The Skinakas Observatory is a collaborative project of the University of Crete, the Foundation for Research and Technology -Hellas, and the Max-Planck-Institut fur Extraterrestrische Physik. The Abastumani team acknowledges financial support by the Shota Rustaveli National Science Foundation under contract FR/217554/16. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. GD and OV gratefully acknowledge the observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory, Bulgarian Academy of Sciences, via bilateral joint research project 'Study of ICRF radio-sources and fast variable astronomical objects' (head -G.Damljanovic). This work is a part of the Projects No. 176011 ('Dynamics and Kinematics of Celestial Bodies and Systems'), No. 176004 ('Stellar Physics'), and No. 176021 ('Visible and Invisible Matter in Nearby Galaxies: Theory and Observations') supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. JE is indebted to DGAPA (Universidad Nacional Autonoma de M ' exico) for financial support, PAPIIT project IN114917. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. Data from the Steward Observatory blazar monitoring project were used. This program is supported by NASA/Fermi Guest Investigator grants NNX12AO93G and NNX15AU81G. We acknowledge support by Bulgarian National Science Programme 'Young Scientists and Postdoctoral Students 2019', Bulgarian National Science Fund under grant DN18-10/2017 and National RI Roadmap Projects DO1-157/28.08.2018 and DO1-153/28.08.2018 of the Ministry of Education and Science of the Republic of Bulgaria. This publication makes use of data obtained at Mets ahovi Radio Observatory, operated by Aalto University in Finland. The Astronomical Observatory of the Autonomous Region of theAostaValley (OAVdA) is managed by the Fondazione Clment Fillietroz-ONLUS, which is supported by the Regional Government of the Aosta Valley, the TownMunicipality of Nus and the 'Unit des Communes valdtaines Mont-milius'. The research at the OAVdA was partially funded by two 'Research and Education' grants from Fondazione CRT. RR acknowledges support from CONICYT project Basal AFB-170002. MM and TM acknowledge support through the Russian Government Program of Competitive Growth of Kazan Federal University. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. We thank the Swift team for making these observations possible, the duty scientists, and science planners. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. FD thanks S. Covino for his help with the REM data reduction. This research has made use of data obtained from the high-energy Astrophysics Science Archive Research Center (HEASARC) provided by NASA's Goddard Space Flight Center.