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  2. Lists of deaths by year - Wikipedia

    en.wikipedia.org/wiki/Lists_of_deaths_by_year

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Help; Learn to edit; Community portal; Recent changes; Upload file

  3. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/Coupon_collector's_problem

    An alternative statement is: given n coupons, how many coupons do you expect you need to draw with replacement before having drawn each coupon at least once? The mathematical analysis of the problem reveals that the expected number of trials needed grows as Θ ( n log ⁡ ( n ) ) {\displaystyle \Theta (n\log(n))} .

  4. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Practical implementations rely heavily on decoding the constituent SPC codes in parallel. LDPC codes were first introduced by Robert G. Gallager in his PhD thesis in 1960, but due to the computational effort in implementing encoder and decoder and the introduction of Reed–Solomon codes, they were mostly ignored until the 1990s.

  5. Wearable technology - Wikipedia

    en.wikipedia.org/wiki/Wearable_technology

    Wearable technology is any technology that is designed to be used while worn.Common types of wearable technology include smartwatches and smartglasses.Wearable electronic devices are often close to or on the surface of the skin, where they detect, analyze, and transmit information such as vital signs, and/or ambient data and which allow in some cases immediate biofeedback to the wearer.

  6. Ethanol - Wikipedia

    en.wikipedia.org/wiki/Ethanol

    According to the Renewable Fuels Association, as of 30 October 2007, 131 grain ethanol bio-refineries in the U.S. have the capacity to produce 7 × 10 ^ 9 US gal (26,000,000 m 3) of ethanol per year. An additional 72 construction projects underway (in the U.S.) can add 6.4 billion US gallons (24,000,000 m 3 ) of new capacity in the next 18 months.

  7. Sulfuric acid - Wikipedia

    en.wikipedia.org/wiki/Sulfuric_acid

    Although nearly 100% sulfuric acid solutions can be made, the subsequent loss of SO 3 at the boiling point brings the concentration to 98.3% acid. The 98.3% grade, which is more stable in storage, is the usual form of what is described as "concentrated sulfuric acid".