منابع مشابه
Data Mining Web Archives
Many institutions are now building rich, significant archives of web content. Though the number of web archiving programs has grown, access models for these collections have remained focused on URL-based discovery and traditional live-web-style browsing. Given the resources required to build and maintain web archives, finding new forms of access for these collection will help increase use and t...
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Digital libraries and other large archives of electronically retrievable and manipulable material are becoming widespread in both commercial and scientific arenas. Advances in networking technologies have led to a greater proliferation of wide-area distributed data warehousing. This presents particular challenges associated with distributed data management. We review the available tools and tec...
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Digital archives contribute to Big Data. Combining social network analysis, coincidence analysis, data reduction, and visual analytics leads to better characterize topics over time, publishers ́ main themes and best authors of all times, according to the British newspaper The Guardian and from the 3 million records of the British National bibliography.
متن کاملPhotometric calibration of Megacam data
Traditionally, the elixir pipeline (Magnier and Cuillandre 2004) has been using the standard stars observed by Smith et al. (2002)to establish an absolute photometric calibration scale for Megacam data. This set of standard stars is the basis of the absolute calibration of the SDSS photometric survey, and is used by Smith et al. (2002) to establish the correspondance between the (now standard) ...
متن کاملThe Hipparcos mission: photometric data
An overview of the Hipparcos and Tycho photometric data is presented, with reference to the main aspects of the data reductions and the overall quality and quantity of the results. The data have been presented in three forms: as mean values in the astrometric catalogues, as epoch photometry, and as interpreted results of the variability analysis, which is also briefly described.
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1989
ISSN: 1539-2996
DOI: 10.1017/s1539299600008637