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TripleH
Administrator
Data inscrierii: 23/Sep/2007
Mesaje: 2565
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 Trimis: 03/11/2007 10:39 Titlul subiectului: Tehnologie! |
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[URL=http://imageshack.us] [/URL]
IBM a lansat astazi, simultan, cel mai rapid microprocesor din lume si un nou server ultra-performant care foloseste inovatiile din domeniul conservarii energiei si tehnologia de virtualizare. Compania sustine ca acest nou server este întâiul care detine recordurile la toate cele 4 teste de viteza pentru performanta tehnica si de afaceri.
Cu o frecventa de 4,7 GHz, procesorul dual-core POWER6 dubleaza viteza precedentului POWER5, folosind aproximativ acelasi indice de energie electrica atat pentru functionare cat si pentru racire.
Serverul IBM dispune de 2 pana la 16 nuclee si ofera o performanta de 3 ori mai mare pe nucleu, spre deosebire de computerul HP Superdome, conform datelor testului TPC-C. Producatorul sustine ca viteza lui POWER6 este de aproape 3 ori mai mare decat cea a ultimului procesor HP Itanium, integrat in linia de servere HP. Largimea de banda aferenta procesorului POWER6 – 300 de gigabiti pe secunda – permite descarcarea intregului catalog iTunes in aproape 60 de secunde – de 30 de ori mai repede decat HP Itanium.
Pozitia de lider in ceea ce priveste performanta este datorata in mare parte proiectarii echilibrate a sistemului, sustine IBM. Procesorul POWER6 are un cache de 8MB per cip – de patru ori mai mare decat POWER5 – pentru a face fata largimii de banda extrem mari aferente procesorului.
“Asemenea victoriei la sah a supercomputerului IBM Deep Blue, in urma cu 10 ani, lansarea sistemelor bazate pe procesorul POWER6 demonstreaza ca perseverenta in inovatie determina atingerea unor obiective considerate imposibile”, a declarat Gabriel Ciucu, Systems and Technology Group Manager, IBM Romania. “Procesorul POWER6 integreaza performantele incredibile si tehnologiile de conservare a energiei, generand o valoare a afacerii fara precedent pentru clientii nostri”.
IBM vizeaza introducerea procesorului POWER6 pentru liniile de servere System p si System.
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BloodVirus
Profesionist
Data inscrierii: 26/Oct/2007
Mesaje: 262
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| Trimis: 04/11/2007 20:54 Titlul subiectului: |
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Poate ati aflat si voi cum era la noi viata in anii 50... Ei bine, dragi colegi de forum, pe cand noi facusem primul canal alb-negru TVR, in alta parte a lumii:
| Citat: | In 1957, Charles Hard Townes and Arthur Leonard Schawlow, then at Bell Labs, began a serious study of the infrared maser. As ideas were developed, infrared frequencies were abandoned with focus on visible light instead. The concept was originally known as an "optical maser". Bell Labs filed a patent application for their proposed optical maser a year later. Schawlow and Townes sent a manuscript of their theoretical calculations to Physical Review, which published their paper that year (Volume 112, Issue 6).
The first page of Gordon Gould's laser notebook in which he coined the acronym LASER and described the essential elements for constructing one.At the same time Gordon Gould, a graduate student at Columbia University, was working on a doctoral thesis on the energy levels of excited thallium. Gould and Townes met and had conversations on the general subject of radiation emission. Afterwards Gould made notes about his ideas for a "laser" in November 1957, including suggesting using an open resonator, which became an important ingredient of future lasers.
In 1958, Prokhorov independently proposed using an open resonator, the first published appearance of this idea. Schawlow and Townes also settled on an open resonator design, apparently unaware of both the published work of Prokhorov and the unpublished work of Gould.
The term "laser" was first introduced to the public in Gould's 1959 conference paper "The LASER, Light Amplification by Stimulated Emission of Radiation".[7] [8] Gould intended "-aser" to be a suffix, to be used with an appropriate prefix for the spectra of light emitted by the device (x-ray laser = xaser, ultraviolet laser = uvaser, etc.). None of the other terms became popular, although "raser" was used for a short time to describe radio-frequency emitting devices.
Gould's notes included possible applications for a laser, such as spectrometry, interferometry, radar, and nuclear fusion. He continued working on his idea and filed a patent application in April 1959. The U.S. Patent Office denied his application and awarded a patent to Bell Labs in 1960. This sparked a legal battle that ran 28 years, with scientific prestige and much money at stake. Gould won his first minor patent in 1977, but it was not until 1987 that he could claim his first significant patent victory when a federal judge ordered the government to issue patents to him for the optically pumped laser and the gas discharge laser.
The first working laser was made by Theodore H. Maiman in 1960[9] at Hughes Research Laboratories in Malibu, California, beating several research teams including those of Townes at Columbia University, Arthur L. Schawlow at Bell Labs,[10] and Gould at a company called TRG (Technical Research Group). Maiman used a solid-state flashlamp-pumped synthetic ruby crystal to produce red laser light at 694 nanometres wavelength. Maiman's laser, however, was only capable of pulsed operation due to its three energy level pumping scheme.
Later in 1960 the Iranian physicist Ali Javan, working with William Bennet and Donald Herriot, made the first gas laser using helium and neon. Javan later received the Albert Einstein Award in 1993.
The concept of the semiconductor laser diode was proposed by Basov and Javan. The first laser diode was demonstrated by Robert N. Hall in 1962. Hall's device was made of gallium arsenide and emitted at 850 nm in the near-infrared region of the spectrum. The first semiconductor laser with visible emission was demonstrated later the same year by Nick Holonyak, Jr. As with the first gas lasers, these early semiconductor lasers could be used only in pulsed operation, and indeed only when cooled to liquid nitrogen temperatures (77 K).
In 1970, Zhores Alferov in the Soviet Union and Izuo Hayashi and Morton Panish of Bell Telephone Laboratories independently developed laser diodes continuously operating at room temperature, using the heterojunction structure.
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