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François Auguste Claude
François Auguste Claude (30 December 1858 – 15 July 1938) was a French astronomer who worked at the Bureau des Longitudes which dealt with the measurement of longitude and the maintenance of standard time. He designed the first prismatic astrolabe An astrolabe (; ; ) is an astronomy, astronomical list of astronomical instruments, instrument dating to ancient times. It serves as a star chart and Model#Physical model, physical model of the visible celestial sphere, half-dome of the sky. It ... in 1899. Claude was born in Strasbourg and following the annexation of the Alsace region by Germany in 1871 he chose French citizenship and served in the army. He then worked as a designer for six years and joined the Bureau des Longitudes at the Parc de Montsouris in Paris. Despite having no formal university degrees, he became assistant calculator in 1884 and rose to the position of director in 1929. His most important contribution was the design of a (60°) prismatic astrolabe which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prism Astrolabe
PRISM is a code name for a program under which the United States National Security Agency (NSA) collects internet communications from various U.S. internet companies. The program is also known by the SIGAD . PRISM collects stored internet communications based on demands made to internet companies such as Google LLC and Apple under Section 702 of the FISA Amendments Act of 2008 to turn over any data that match court-approved search terms. Among other things, the NSA can use these PRISM requests to target communications that were encrypted when they traveled across the internet backbone, to focus on stored data that telecommunication filtering systems discarded earlier, and to get data that is easier to handle. PRISM began in 2007 in the wake of the passage of the Protect America Act under the Bush Administration. The program is operated under the supervision of the U.S. Foreign Intelligence Surveillance Court (FISA Court, or FISC) pursuant to the Foreign Intelligence Surve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
