2 resultados para milestone
em Universidade Complutense de Madrid
Resumo:
Mexico is now one of the countries with better policies on transparency and access to public information, according to various indicators and academics. Just fifteen years ago, Mexico was a country that lacked legal instruments thereon, whereby the institutions were deeply opaque and citizens could not exercise this right of access to public information. The development of the right of access to public information, in both law and public policy, a milestone in the history of Mexico. It has been, therefore gestation, as its formulation and implementation. In Mexico there have existed diverse social movements that have promoted democratization and the defense of human rights. In the framework of these movements the fight registers for the right of access to the public information that one presents as a successful model of civic action and government intervention, without for it, not to know the challenges that his deepening has still and take root both in the company and in the political class in general. How was it achieved to construct a new institutional of transparency that was functional? How was it possible that the above mentioned change was achieved? These are questions that interests formulated to the political science and to the public administration for the analysis of the change and improvement of institutions. The study of the political change is relevant since the public policies precisely try to solve a problem, to transform a reality but not always the change is achieved, is not even realized of successful form. In a nascent democratic regime, it turns out important to know what factors can collaborate in the conformation of a public successful sustainable politics in the time. Even more, on having treated itself about a substantive politics that it gives content and viability itself to the democracy in a marked country historically and culturally for the opaqueness and the corruption...
Resumo:
A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context and by addressing the suitability of planets for the presence of life. EChO—the Exoplanet Characterisation Observatory—is a mission concept specifically geared for this purpose. EChO will provide simultaneous, multi-wavelength spectroscopic observations on a stable platform that will allow very long exposures. The use of passive cooling, few moving parts and well established technology gives a low-risk and potentially long-lived mission. EChO will build on observations by Hubble, Spitzer and ground-based telescopes, which discovered the first molecules and atoms in exoplanetary atmospheres. However, EChO’s configuration and specifications are designed to study a number of systems in a consistent manner that will eliminate the ambiguities affecting prior observations. EChO will simultaneously observe a broad enough spectral region—from the visible to the mid-infrared—to constrain from one single spectrum the temperature structure of the atmosphere, the abundances of the major carbon and oxygen bearing species, the expected photochemically-produced species and magnetospheric signatures. The spectral range and resolution are tailored to separate bands belonging to up to 30 molecules and retrieve the composition and temperature structure of planetary atmospheres. The target list for EChO includes planets ranging from Jupiter-sized with equilibrium temperatures T_ eq up to 2,000 K, to those of a few Earth masses, with T _eq \u223c 300 K. The list will include planets with no Solar System analog, such as the recently discovered planets GJ1214b, whose density lies between that of terrestrial and gaseous planets, or the rocky-iron planet 55 Cnc e, with day-side temperature close to 3,000 K. As the number of detected exoplanets is growing rapidly each year, and the mass and radius of those detected steadily decreases, the target list will be constantly adjusted to include the most interesting systems. We have baselined a dispersive spectrograph design covering continuously the 0.4–16 μm spectral range in 6 channels (1 in the visible, 5 in the InfraRed), which allows the spectral resolution to be adapted from several tens to several hundreds, depending on the target brightness. The instrument will be mounted behind a 1.5 m class telescope, passively cooled to 50 K, with the instrument structure and optics passively cooled to \u223c45 K. EChO will be placed in a grand halo orbit around L2. This orbit, in combination with an optimised thermal shield design, provides a highly stable thermal environment and a high degree of visibility of the sky to observe repeatedly several tens of targets over the year. Both the baseline and alternative designs have been evaluated and no critical items with Technology Readiness Level (TRL) less than 4–5 have been identified. We have also undertaken a first-order cost and development plan analysis and find that EChO is easily compatible with the ESA M-class mission framework.