#CiberDemosCratos20170213
Un diario para las generaciones XYZ.
#Efemerides
#SinLugar #EnUnMundoAlterno #CirCuloDelLátigoNegro #InternationalWorkShop #ArtEtPhotographie #FraternidadFilantroPicaFutorologaDelFalismo
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… el tipo de cambio obtenido el día de hoy fue de $20.3535 M.N. (veinte pesos con tres mil quinientos treinta y cinco diezmilésimos moneda nacional) por un dólar de los EE.UU.A.
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#Acontecimientos
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Thermionic emission is the thermally induced flow of charge carriers from a surface or over a potential-energy barrier. This occurs because the thermal energy given to the carrier overcomes the work function of the material. The charge carriers can be electrons or ions, and in older literature are sometimes referred to as "thermions". After emission, a charge that is equal in magnitude and opposite in sign to the total charge emitted is initially left behind in the emitting region. But if the emitter is connected to a battery, the charge left behind is neutralized by charge supplied by the battery as the emitted charge carriers move away from the emitter, and finally the emitter will be in the same state as it was before emission.
The classical example of thermionic emission is the emission of electrons from a hot cathode into a vacuum (also known as thermal electron emission or the Edison effect) in a vacuum tube. The hot cathode can be a metal filament, a coated metal filament, or a separate structure of metal or carbides or borides of transition metals. Vacuum emission from metals tends to become significant only for temperatures over 1,000 K (730 °C; 1,340 °F).
The term "thermionic emission" is now also used to refer to any thermally-excited charge emission process, even when the charge is emitted from one solid-state region into another. This process is crucially important in the operation of a variety of electronic devices and can be used for electricity generation (such as thermionic converters and electrodynamic tethers) or cooling. The magnitude of the charge flow increases dramatically with increasing temperature.
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1960 – With the success of a nuclear test codenamed "Gerboise Bleue", France becomes the fourth country to possess nuclear weapons.
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The Madrid Codices I–II (I – Ms. 8937 i II – Ms. 8936), are two manuscripts by Leonardo da Vinci which were discovered in the Biblioteca Nacional de España in Madrid in 1965 by Dr. Jules Piccus, Language Professor at the University of Massachusetts. The Madrid Codices I was finished during 1490 and 1499, and II from 1503 to 1505.
The two codices were brought to Spain by Pompeo Leoni, a sculptor in the court of Philip II. After various changes of ownership, they were transferred to the monastic library of El Escorial and finally to the Biblioteca Real, where they remained unknown for 252 years.
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2004 – The Harvard–Smithsonian Center for Astrophysics announces the discovery of the universe's largest known diamond, white dwarf star BPM 37093. Astronomers named this star "Lucy" after The Beatles' song "Lucy in the Sky with Diamonds".
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#FelizAniversário
#FelizCumpleaños
#HappyBirthday
#JoyeuxAnniversaire
#BuonCompleanno
#Nacimientos
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Ivan Andreyevich Krylov
Ива́н Андре́евич Крыло́в;
February 13, 1769 – November 21, 1844
Formerly a dramatist and journalist, he only discovered his true genre at the age of 40. While many of his earlier fables were loosely based on Aesop's and La Fontaine's, later fables were original work, often with a satirical bent.
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1884 – Alfred Carlton Gilbert, American pole vaulter and businessman, founded the A. C. Gilbert Company (d. 1961)
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William Bradford Shockley Jr.
February 13, 1910 – August 12, 1989
was an American physicist and inventor.
Shockley was the manager of a research group that included John Bardeen and Walter Brattain. The three scientists invented the point-contact transistor in 1947 and were jointly awarded the 1956 Nobel Prize in Physics.
Shockley's attempts to commercialize a new transistor design in the 1950s and 1960s led to California's "Silicon Valley" becoming a hotbed of electronics innovation. In his later life, Shockley was a professor of electrical engineering at Stanford University and became a proponent of eugenics
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born 13 February 1940
is a Norwegian computer scientist, professor in computer science at the Norwegian University of Science and Technology (NTNU) in Trondheim, Norway, and an expert in the field of information modelling.
An information model in software engineering is a representation of concepts and the relationships, constraints, rules, and operations to specify data semantics for a chosen domain of discourse. Typically it specifies relations between kinds of things, but may also include relations with individual things. It can provide sharable, stable, and organized structure of information requirements or knowledge for the domain context
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13 February 1941 – 10 June 2010
German painter and photographer
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1958 – Øivind Elgenes, Norwegian vocalist, guitarist and composer; front figure of Dance with a Stranger
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Frederick Brandon Williams
(born February 13, 1966),
C+C Music Factory Accepts 5 Billboard's Awards + Live Performance [Billboard Awards 1991]
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(born 13 February 1978)
He began his musical career with the violin, winning an award at the Versailles conservatory and then took up the piano before turning to singing. He is noted for a virtuosic coloratura technique and for compelling and enlivened interpretations of baroque cantatas and operas.
Philippe Jaroussky in Versailles
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#Obituario RecordarANuestrosMuertosEsDarlesVidaEternaEnNuestrosCorazones.EnPazDescanse
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9 April 1627 – 13 February 1693
German organist and composer.
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1787 – Roger Joseph Boscovich, Croatian physicist, astronomer, mathematician, and philosopher (b. 1711)
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Wilhelm Richard Wagner
22 May 1813 – 13 February 1883
was a German composer, theatre director, polemicist, and conductor who is primarily known for his operas (or, as some of his later works were later known, "music dramas"). Unlike most opera composers, Wagner wrote both the libretto and the music for each of his stage works. Initially establishing his reputation as a composer of works in the romantic vein of Weber and Meyerbeer, Wagner revolutionised opera through his concept of the Gesamtkunstwerk ("total work of art"), by which he sought to synthesise the poetic, visual, musical and dramatic arts, with music subsidiary to drama. He described this vision in a series of essays published between 1849 and 1852. Wagner realised these ideas most fully in the first half of the four-opera cycle Der Ring des Nibelungen (The Ring of the Nibelung).
Wagner - Der Ring Des Nibelungen: Das Rheingold [Boulez] - English Subs
Wagner - Die Walküre, Bayreuth 1992 (Barenboim, Tomlinson, Elming, Secunde)
Wagner - Der Ring Des Nibelungen: Siegfried [Act I/II; Boulez] - English Subs
Wagner - Der Ring Des Nibelungen: Götterdämmerung [Prologue/Act I; Boulez] - English Subs
Wagner - Der Ring Des Nibelungen: Götterdämmerung [Act II/III; Boulez] - English Subs
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Ignacio Manuel Altamirano Basilio
(1834 – 13 February 1893)
Navidad en las Montañas
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6 November 1880 – 13 February 1967
370Z Roadster
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born 12 March 1915 – 13 February 1995
was an Italian painter and sculptor.
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#Celebrate World Radio Day
is an observance day held annually on 13 February.
World Radio Day is about celebrating radio,
why we love it and why we need it today more than ever.
A day to remember the unique power of radio to touch lives and bring people together across every corner of the globe.
It was proclaimed on 3 November 2011 by UNESCO's 36th General Conference after originally proposed by the Kingdom of Spain.
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