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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, inventor, and futurist. He is involved in fields such as optical character recognition (OCR), text-to-speech synthesis, speech recognition technology and electronic keyboard instruments. He has written books on health technology ...

  3. Executive Order 6102 - Wikipedia

    en.wikipedia.org/wiki/Executive_Order_6102

    Executive Order 6102 required all persons to deliver on or before May 1, 1933, all but a small amount of gold coin, gold bullion, and gold certificates owned by them to the Federal Reserve in exchange for $20.67 (equivalent to $487 in 2023) [7] per troy ounce. Under the Trading with the Enemy Act of 1917, as amended by the recently passed ...

  4. Book banning in the United States (2021–present) - Wikipedia

    en.wikipedia.org/wiki/Book_banning_in_the_United...

    Outcome. Banning of thousands of books from school libraries in many states. Starting in 2021, there have been a considerable number of books banned or challenged in parts of the United States. Most of the targeted books have to do with race, gender, and sexuality. Unlike most book challenges in the past, whereby parents or other stakeholders ...

  5. ISBN - Wikipedia

    en.wikipedia.org/wiki/ISBN

    The correct order contributes 3 × 6 + 1 × 1 = 19 to the sum; while, if the digits are transposed (1 followed by a 6), the contribution of those two digits will be 3 × 1 + 1 × 6 = 9. However, 19 and 9 are congruent modulo 10, and so produce the same, final result: both ISBNs will have a check digit of 7.

  6. 77 best discounts for ages 50+: Where to save money for ...

    www.aol.com/finance/best-senior-discounts...

    Read the fine print before you pick a rental company, and make sure they take your discount off the base rate for maximum savings. Ages 50 and older. Hertz — 20% off base rate. Sixt — 5% ...

  7. Cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Cutoff_frequency

    Where s is the s-plane variable, ω is angular frequency and j is the imaginary unit.. Chebyshev filters. Sometimes other ratios are more convenient than the 3 dB point. For instance, in the case of the Chebyshev filter it is usual to define the cutoff frequency as the point after the last peak in the frequency response at which the level has fallen to the design value of the passband ripple.

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