Cultural dissemination and interactive audiovisual commucation

Interactive electronic systems are generating specific ways of knowledge transmission. As always, when a new medium appears some of these ways come from pre-existing ones, whilw others are original. In this article we will sum up our view of this process and apply it to several examples of interactive audiovisual communication in general and web connectivity in particular, can add to knowledge transission procesess

Difusió cultural i comunicació audiovisual interactiva

Els sistemes electrònics interactius estan generant formes específiques de transmissió de coneixements. Com sempre que apareix un nou mitjà, algunes d'aquestes formes es deriven dels mitjans preexistents, mentre que d'altres són originals. En aquest article resumirem la nostra visió d'aquest procés i l'aplicarem a diversos exemples d'aplicacions interactives off-line per tenir finalment una primera idea del que la comunicació audiovisual interactiva en general i la conectivitat en xarxa en particular poden afegir als processos de transmissió de coneixements

El discurso interactivo de difusión cultural: innovación y lectores electrónicos

Este artículo reflexiona sobre las características intrínsecas del medio interactivo, centrándose en las aplicaciones de difusión cultural y en entornos de recepción personales, semejantes a un ordenador multimedia con un dispositivo señalador como un ratón o pantalla táctil y que incluyen a los lectores electrónicos. La reflexión teórica se sustentará en el análisis de la historia de los CD-ROM de difusión cultural que se desarrollaron durante la década de 1990. Las conclusiones pueden abrir vías de reflexión útiles para el conocimiento y desarrollo de aplicaciones de difusión cultural que en verdad aprovechen las características de los futuros lectores electrónicos

Contributions of the interactive decoupage to reading and analyzing interactive audiovisual works in cybermedia.

El epígrafe interactive storytelling, narración interactiva, se aplica a una serie de trabajos periodísticos en formato de reportajes audiovisuales e interactivos que estan ganando cada vez más protagonismo en los cibermedios. En este artículo se propone la definición y descripción de un sistema de análisis, el découpage interactivo, en el que se establecen los parámetros a observar en la lectura de una aplicación audiovisual interactiva. El découpage interactivo es un sistema de análisis formal de audiovisuales interactivos que permite establecer una observación detallada de los aspectos que conforman cualquier audiovisual interactivo: la estructura que lo sustenta, los contenidos, las interfaces a través de las cuales se accede al mismo y los diálogos de interacción que propone. Se describen los distintos apartados que conforman el découpage así como las fases y procedimiento para su ejecución. La herramienta presentada aporta al investigador un documento que describe de forma detallada los elementos que los autores de un determinado audiovisual interactivo utilizaron para desarrollar el guión y producir el mismo. La posibilidad de confrontar el audiovisual interactivo con su descripción en forma de découpage permiten al analista profundizar en la comprensión de los procesos creativos propios de los audiovisuales interactivos.The epigraph “interactive storytelling” is applied to a series of journalistic pieces developed as interactive audiovisual stories that are becoming increasingly prominent in cybermedia. This article suggests the definition and description of an analysis system, the “interactive decoupage”, where the parameters to observe are established when reading an interactive audiovisual application. The interactive decoupage is a formal analysis system of interactive audiovisual works which allows for a thorough observation of the aspects present in any interactive audiovisual work: structure, content, access’ interfaces and the interaction dialogues the work suggests. The different parts of the decoupage are described, as well as the phases and procedure to execute it. The tool presented is a document for the researcher that provides a detailed description of the elements used by the authors of an interactive audiovisual project to develop and produce its script. The possibility of confronting the interactive audiovisual work with its “decoupage” description provides the analyst with more insight into the creative processes of interactive audiovisual projects

The Best Brown Dwarf Yet?: A Companion to the Hyades Eclipsing Binary V471 Tau

We have carried out an analysis of about 160 eclipse timings spanning over 30 years of the Hyades eclipsing binary V471 Tauri that shows a long-term quasi-sinusoidal modulation of its observed eclipse arrival times. The O-Cs have been analyzed for the ``light-time'' effect that arises from the gravitational influence of a tertiary companion. The presence of a third body causes the relative distance of the eclipsing pair to the Earth to change as it orbits the barycenter of the triple system. The result of the analysis of the eclipse times yields a light-time semi-amplitude of 137.2+/-12.0 s, an orbital period of P_3 = 30.5+/-1.6 yr and an eccentricity of e_3 = 0.31+/-0.04. The mass of the tertiary component is M_3 sin i_3 = 0.0393+/-0.0038 Mo when a total mass of 1.61+/-0.06 Mo for V471 Tau is adopted. For orbital inclinations i_3 > 35 deg, the mass of the third body would be below the stable hydrogen burning limit of M = 0.07 Mo and it thus would be a brown dwarf. In the next several years (near maximum elongation), it should be feasible to obtain IR images and spectra of V471 Tau C that, when combined with the known mass, age, distance, and [Fe/H], will serve as a benchmark for understanding the physical properties and evolution of brown dwarfs.Comment: 9 pages, 3 figures, accepted for publication in ApJ Letter

Far-UV Emissions of the Sun in Time: Probing Solar Magnetic Activity and Effects on Evolution of Paleo-Planetary Atmospheres

We present and analyze FUSE observations of six solar analogs. These are single, main-sequence G0-5 strs selected as proxies for the Sun at several stages of its main-sequence lifetime. The emission features in the FUSE 920-1180 A wavelength range allow for a critical probe of the hot plasma over three decades in temperature. Using the flux ratio CIII 1176/977 as diagnostics, we investigate the dependence of the electron pressure of the transition region as a function of the rotation period, age and magnetic activity. The results from these solar proxies indicate that the electron pressure of the stellar ~10^5-K plasma decreases by a factor of about 70 between the young, fast-rotating magnetically active star and the old, slow-rotating inactive star. Also, the observations indicate that the average surface fluxes of emission features strongly decrease with increasing stellar age and longer rotation period. The emission flux evolution with age or rotation period is well fitted by power laws, which become steeper from cooler chromospheric (10^4 K) to hotter coronal (10^7 K) plasma. The relationship for the integrated (920-1180 A) FUSE flux indicates that the solar far-ultraviolet emissions were about twice the present value 2.5 Gyr ago and about 4 times the present value 3.5 Gyr ago. Note also that the FUSE/FUV flux of the Zero-Age Main Sequence Sun could have been higher by as much as 50 times. Our analysis suggests that the strong FUV emissions of the young Sun may have played a crucial role in the developing planetary system, in particular through the photoionization, photochemical evolution and possible erosion of the planetary atmospheres. (abridged)Comment: 15 pages, 8 figures, accepted for publication in Ap