Interactive Web Documents Boyer, John M.; Wiecha, Charles F.; Akolkar, Rahul P.
Computer science (Berlin, Germany),
05/2012, Letnik:
27, Številka:
2
Journal Article
Documents allow end-users to encapsulate information related to a collaborative business process into a package that can be saved, emailed, digitally signed, and used as the basis for interaction in ...an activity or an ad hoc workflow. While documents are used incidentally today in web applications, for example in HTML presentations of content stored otherwise in back-end systems, they are not yet the central artifact for developers of dynamic, data intensive web applications. This paper unifies the storage and management of the various artifacts of web applications into an Interactive Web Document (IWD). Data, presentation, behavior, attachments, and digital signatures collected throughout the business process are unified into a single composite web resource. We describe a standards-based approach to packaging multiple resources into IWD archives based on the Open Document Format, a REST-based protocol for interacting with IWDs, and an extensible interaction controller architecture.
(Abridged) We describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). A vast array of science will be enabled by a single wide-deep-fast ...sky survey, and LSST will have unique survey capability in the faint time domain. The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the Solar System, exploring the transient optical sky, and mapping the Milky Way. LSST will be a wide-field ground-based system sited at Cerro Pach\'{o}n in northern Chile. The telescope will have an 8.4 m (6.5 m effective) primary mirror, a 9.6 deg\(^2\) field of view, and a 3.2 Gigapixel camera. The standard observing sequence will consist of pairs of 15-second exposures in a given field, with two such visits in each pointing in a given night. With these repeats, the LSST system is capable of imaging about 10,000 square degrees of sky in a single filter in three nights. The typical 5\(\sigma\) point-source depth in a single visit in \(r\) will be \(\sim 24.5\) (AB). The project is in the construction phase and will begin regular survey operations by 2022. The survey area will be contained within 30,000 deg\(^2\) with \(\delta<+34.5^\circ\), and will be imaged multiple times in six bands, \(ugrizy\), covering the wavelength range 320--1050 nm. About 90\% of the observing time will be devoted to a deep-wide-fast survey mode which will uniformly observe a 18,000 deg\(^2\) region about 800 times (summed over all six bands) during the anticipated 10 years of operations, and yield a coadded map to \(r\sim27.5\). The remaining 10\% of the observing time will be allocated to projects such as a Very Deep and Fast time domain survey. The goal is to make LSST data products, including a relational database of about 32 trillion observations of 40 billion objects, available to the public and scientists around the world.
LSST Science Book, Version 2.0 Abell, Paul A; Andrew, John R; Angel, J Roger P ...
arXiv (Cornell University),
12/2009
Paper, Journal Article
Odprti dostop
A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic ...Survey Telescope (LSST) will have an effective aperture of 6.7 meters and an imaging camera with field of view of 9.6 deg^2, and will be devoted to a ten-year imaging survey over 20,000 deg^2 south of +15 deg. Each pointing will be imaged 2000 times with fifteen second exposures in six broad bands from 0.35 to 1.1 microns, to a total point-source depth of r~27.5. The LSST Science Book describes the basic parameters of the LSST hardware, software, and observing plans. The book discusses educational and outreach opportunities, then goes on to describe a broad range of science that LSST will revolutionize: mapping the inner and outer Solar System, stellar populations in the Milky Way and nearby galaxies, the structure of the Milky Way disk and halo and other objects in the Local Volume, transient and variable objects both at low and high redshift, and the properties of normal and active galaxies at low and high redshift. It then turns to far-field cosmological topics, exploring properties of supernovae to z~1, strong and weak lensing, the large-scale distribution of galaxies and baryon oscillations, and how these different probes may be combined to constrain cosmological models and the physics of dark energy.
