Died 2004-06-22.. He worked for Lockheed Aircraft, Marquardt Aircraft, Lockheed Missiles and Space, IBM Corp. and the Univac division of Sperry Rand. He went to Paris in 1965 for a year to work for Bull General Electric, then back to the United States with GE and Honeywell Information Systems until his 1982 retirement. He promptly started his own software company, which he eventually sold to BigiSoft Inc., retaining the title of chief scientist.... [+]

El sistema tychònic va ser un model del sistema solar publicat per Tycho Brahe a finals del segle XVI, que combinava els avantatges matemàtics del sistema heliocentrista de Copèrnic amb les idees filosòfiques i «físiques» del sistema geocèntric de Ptolomeu. El model va poder ser inspirat per Valentin Naboth[1] i Paul Wittich.[2] Un model geo-heliocèntric similar va ser proposat anteriorment per Nilakantha Somayaji de l'Escola de... [+]

Un generador de gas de fusta és una unitat de gasificació que converteix la fusta o el carbó vegetal en gas de fusta,un sintetitzador format per nitrogen atmosfèric, monòxid de carboni, hidrogen,traces de metài altres gasos, que després de refredar-se i filtrar-se es poden utilitzar per alimentar un motor de combustió interna o per a altres propòsits. Històricament, els generadors de gas de fusta sovint es muntaven en vehicles,però els estudis i desenvolupaments actuals es concentren... [+]

Aphasia is an inability to comprehend or formulate language because of damage to specific brain regions.[2] The major causes are stroke and head trauma; prevalence is hard to determine but aphasia due to stroke is estimated to be 0.1–0.4% in the Global North.[3] Aphasia can also be the result of brain tumors, brain infections, or neurodegenerative diseases (such as... [+]

The Peacock Clock (Russian: Павлин часы; The Peacock Clock is a mechanical carillon with a clockwork. It was made in England between 1766 and 1772[1] and then given to Catherine the Great by Grigory Alexandrovich Potemkin. [2] The clock is decorated with intricately crafted movable replicas of plants and animals, including a large golden peacock, from which its name derives. [3] Because of its magnificent appearance and complex mechanical movements, including musical accompaniment,... [+]