194,908 research outputs found
SUTIL: system utilities routines programmer's reference manual
A package of FORTRAN callable subroutines which allows efficient communication of data between users and programs is described. Proper utilization of the SUTIL package to reduce program core requirements and expedite program development is emphasized
Emoción y cognición. James, más de cien años después
In this paper we present a brief exposition of the main theories regarding emotions -their nature and role in human behaviour- which have appeared since the beginning of the century. We suggest that our knowledge of the emotions has progressed little because of deep epistemological mistakes, such as the central role attributed to cognition in the explanation of phenomena. Cognitive theories stem from the concept of intentionality proposed by philosophers such as Brentano, Stumpf and Husserl, which cannot be applied to all expressions of emotion. Finally, we suggest some solutionsfrom un unti-Cartesian perspective, against the dualism of mind and body, inspired by the works of Vygotsky and Wittgenstein.En este artículo se realiza una breve descripción de las principales líneas teóricas que se han elaborado desde comienzos de siglo para explicar la naturaleza de las emociones y el papel que desempeñan en el comportamiento humano. Se advierte que nuestro conocimiento en este asunto no avanza adecuadamente debido a profundos errores de corte epistemológico, como es la predominancia que se concede a la cognición en la explicación de los fenómenos. Las teorías cognitivas se derivan del concepto de intencionalidad propuesto por filósofos como Brentano, Stumpf y Husserl, que no es aplicable a todas las forns de emoción. Finalmente, se proponen algunas altemativas de corte anticartesiano, contra el dualismo mente-cuerpo, inspiradas en las obras de Vygotski y Wittgenstein
Compact radio emission in Ultraluminous X-ray sources
We present results from our studies of radio emission from selected
Ultraluminous X-ray (ULX) sources, using archival Giant Metrewave Radio
Telescope (GMRT) data and new European VLBI Network (EVN) observations. The
GMRT data are used to find possible faint radio emission from ULX sources
located in late-type galaxies in the Chandra Deep Fields. No detections are
found at 235, 325 and 610 MHz, and upper limits on the radio flux densities at
these frequencies are given. The EVN observations target milliarcsecond-scale
structures in three ULXs with known radio counterparts (N4449- X1, N4088-X1,
and N4861-X2). We confirm an earlier identification of the ULX N4449-X1 with a
supernova remnant and obtain the most accurate estimates of its size and age.
We detect compact radio emission for the ULX N4088-X1, which could harbour an
intermediate mass black hole (IMBH) of 10^5 M\odot accreting at a sub-Eddington
rate. We detect a compact radio component in the ULX N4861-X2, with a
brightness temperature > 10^6 K and an indication for possible extended
emission. If the extended structure is confirmed, this ULX could be an HII
region with a diameter of 8.6 pc and surface brightness temperature \geq 10^5
K. The compact radio emission may be coming from a ~ 10^5 M\odot black hole
accreting at 0.1M_Edd.Comment: 5 pages, 6 figures. Accepted for publication in the Astronomische
Nachrichte
Fendt 722 Vario, sutil tecnologia para profesionales exigentes
El 21 de diciembre, en vísperas de la Lotería de Navidad, realizamos este exhaustivo estudio de campo que resume detalles técnicos del tractor Fendt 722 Vario (como sucesor de la bien conocida serie 800 de Fendt -818 y 820-), así como el análisis del comportamiento en laboreo y transporte, grabando al efecto datos del motor, del sistema de inyección de urea y de la transmisión. Fendt aglutina un 5,3% de la cuota nacional en el mercado de tractores y representa una tipología de usuario muy profesionalizado y exigente en términos de eficiencia y ergonomía, tal y como esperamos mostrar en este artícul
Significado léxico y significado textual de la unidad lexemática "dar"
Este artículo presenta un estudio de la unidad verbal “dar” desde una perspectiva lexemático-sintáctica, ya que ésta permite observar las correferencias entre los rasgos léxico-semánticos y sintácticos. En este análisis hemos comprobado que la producción idealizada no siempre coincide con el comportamiento actualizado del habla de Sevilla y de los textos periodísticos. La mayoría de las veces, el significado del verbo depende del entorno sintáctico y del valor semántico de los significados con los que se construye. This article shows an analysis of the verbal-unit “dar” from a lexematic-syntactic perspective, because it allows to observe the correference between the characteristics semantics and the syntactics ones. In this analysis we have verified that the idealizaed production does not always coincide with the actual behaviour of Seville speech and of the journalistic texts. Most of times, the meaning of the verb depends on syntactic environment and semantic value of the nominal group that is built with
"Set in Poland, that is to say Nowhere": Alfred Jarry and the Politics of Topological Space
This article is intended to shed light on philosophical considerations on the ontology of space (situation) as put forward in the prose and dramatic writings of French iconoclast Alfred Jarry, by posing that Jarry's notion of space is dynamic in a twofold sense. Firstly, Jarry's sense of space is consistently described in terms of a sense of temporality (duration), which is why Jarry's sense of space is distinctly higher-dimensional (space- time). Secondly, I argue that Jarry's reaction against conventional modalities of scientific and artistic thinking take the form of a subversive turn (which Deleuze calls the Great Turning), via the pseudoscience of pataphysics, which is directed not only against metaphysics, but also a geometric understanding of the physical and metaphysical worlds. I argue that Jarry's conception of a spatio-temporal ontology is distinctly non-geometric, or topological in nature. Topological imagery allows Jarry to present a more vital and fleshed out sense of living space-time, within which a new politics of space and time is activated by the forces of endless change and continuous deformation. I argue that through the topological corporeality of Ubu, Jarry promotes a sense of ABSTRACT theatre within which the dynamic properties of topological space become actualised in the way of a politics of the unimaginable, an Ubuesque realm where, through the power of technology and the imagination, the exceptional and unrealisable rule
A search for radio counterparts to Chandra ULX candidates
We present a systematic search for radio counterparts to Ultra Luminous X-ray
(ULX) source candidates based on a cross-correlation of the Swartz et al.
(2004) ULX catalogue based on Chandra data and the FIRST radio survey. We find
seven cases of conspiscuous peaks of radio emission that could be associated to
ULX sources. Among these seven ULX radio candidates, three X-ray sources are
located within 5" of the FIRST radio peaks. These three cases are shown and
discussed individually.Comment: 5 pages, 3 figures. Accepted for publication in the Astronomische
Nachrichten, to appear in the proceedings of the conference "Ultra-Luminous
X-ray sources and Middle Weight Black Holes" (Madrid, May 24-26, 2010).
Resubmission corrects the Authors list and the acknowledgement
Real-time evolution of a large-scale relativistic jet
Context. Astrophysical jets are ubiquitous in the Universe on all scales, but
their large-scale dynamics and evolution in time are hard to observe since they
usually develop at a very slow pace.
Aims. We aim to obtain the first observational proof of the expected
large-scale evolution and interaction with the environment in an astrophysical
jet. Only jets from microquasars offer a chance to witness the real-time,
full-jet evolution within a human lifetime, since they combine a 'short', few
parsec length with relativistic velocities.
Methods. The methodology of this work is based on a systematic recalibraton
of interferometric radio observations of microquasars available in public
archives. In particular, radio observations of the microquasar GRS 1758-258
over less than two decades have provided the most striking results.
Results. Significant morphological variations in the extended jet structure
of GRS 1758-258 are reported here that were previously missed. Its northern
radio lobe underwent a major morphological variation that rendered the hotspot
undetectable in 2001 and reappeared again in the following years. The reported
changes confirm the Galactic nature of the source. We tentatively interpret
them in terms of the growth of instabilities in the jet flow. There is also
evidence of surrounding cocoon. These results can provide a testbed for models
accounting for the evolution of jets and their interaction with the
environment.Comment: 5 pages, 3 figures, 2 tables. Accepted for publication in Astronomy
and Astrophysics Letter
The resolved structure of the extragalactic supernova remnant SNR 4449-1
We present very long baseline interferometry (VLBI) observations of the
milliarcsecond-scale radio structure of the supernova remnant SNR 44491 in
the galaxy NGC 4449. This young and superluminous remnant was observed at 1.6
GHz (\,cm) with the European VLBI Network. The observations
confirm earlier identifications of this object with a supernova remnant (SNR)
while revealing a somewhat different morphology compared with the structure
reported by Bietenholz et al. from VLBI observations at 1.4 GHz. This
difference is discussed here in the context of structural sensitivity of both
observations. The 1.6 GHz image yields accurate estimates of the size (0.0422
arcsec 0.0285 arcsec and 0.8 0.5 pc) and age (55 yr) of
SNR 44491. With a total flux of 6.1 0.6 mJy measured in the VLBI
image, the historical lightcurve of the source can be well represented by a
power-law decay with a power index of 1.19 0.07. The SNR exhibits a
decline rate of the radio emission of 2.2 0.1 yr and a radio
luminosity of 1.74 10 erg s.Comment: 7 pages, 6 figures, MNRAS preprint, arXiv:1309.401
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