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  2. Ray Kurzweil - Wikipedia

    en.wikipedia.org/wiki/Ray_Kurzweil

    Raymond Kurzweil ( / ˈkɜːrzwaɪl /, KURZ-wyle; born February 12, 1948) is an American computer scientist, author, entrepreneur, futurist, and inventor. He is involved in fields such as optical character recognition (OCR), text-to-speech synthesis, speech recognition technology and electronic keyboard instruments.

  3. Abortion law in the United States by state - Wikipedia

    en.wikipedia.org/wiki/Abortion_law_in_the_United...

    The law was challenged in courts, though had yet to have a full formal hearing as its September 1, 2021, enactment date came due. Plaintiffs sought an order from the U.S. Supreme Court to stop the law from coming into effect, but the Court issued a denial of the order late on September 1, 2021, allowing the law to remain in effect.

  4. Luxottica - Wikipedia

    en.wikipedia.org/wiki/Luxottica

    Luxottica Group S.p.A. is an Italian eyewear conglomerate based in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands all through its own subsidiaries. The company, presently organized as a subsidiary of EssilorLuxottica which formed when the Italian conglomerate merged with ...

  5. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci sequence. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes ...

  6. Polychlorinated biphenyl - Wikipedia

    en.wikipedia.org/wiki/Polychlorinated_biphenyl

    In general, the first two digits refer to the product series as designated by Monsanto (e.g. 1200 or 1100 series); the second two numbers indicate the percentage of chlorine by mass in the mixture. Thus, Aroclor 1260 is a 1200 series product and contains 60% chlorine by mass.

  7. X-ray fluorescence - Wikipedia

    en.wikipedia.org/wiki/X-ray_fluorescence

    The term fluorescence is applied to phenomena in which the absorption of radiation of a specific energy results in the re-emission of radiation of a different energy (generally lower). Figure 2: Typical wavelength dispersive XRF spectrum. Figure 3: Spectrum of a rhodium target tube operated at 60 kV, showing continuous spectrum and K lines.

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