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  2. Berlin Wall - Wikipedia

    en.wikipedia.org/wiki/Berlin_Wall

    Satellite image of Berlin, with the Wall's location marked in yellow. West and East Berlin borders overlaying a current road map. The Berlin Wall ( German: Berliner Mauer, pronounced [bɛʁˌliːnɐ ˈmaʊɐ] ⓘ) was a guarded concrete barrier that encircled West Berlin of the Federal Republic of Germany (FRG; West Germany) from 1961 to 1989 ...

  3. Instant-runoff voting - Wikipedia

    en.wikipedia.org/wiki/Instant-runoff_voting

    Instant-runoff voting ( IRV ), also known as alternative vote ( AV) [1] or plurality loser, [2] is a ranked-choice voting system that modifies plurality by repeatedly eliminating the last-place finisher until only one candidate is left. [3] [4] In the United States, IRV is often mistaken conflated with ranked-choice voting (RCV); [5] however ...

  4. EMV - Wikipedia

    en.wikipedia.org/wiki/EMV

    EMV is a payment method based on a technical standard for smart payment cards and for payment terminals and automated teller machines which can accept them. EMV stands for " Europay, Mastercard, and Visa ", the three companies that created the standard.

  5. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...

  6. Bayes' theorem - Wikipedia

    en.wikipedia.org/wiki/Bayes'_theorem

    A factory produces items using three machines—A, B, and C—which account for 20%, 30%, and 50% of its output respectively. Of the items produced by machine A, 5% are defective; similarly, 3% of machine B's items and 1% of machine C's are defective. If a randomly selected item is defective, what is the probability it was produced by machine C?

  7. Whole genome sequencing - Wikipedia

    en.wikipedia.org/wiki/Whole_genome_sequencing

    Whole genome sequencing ( WGS ), also known as full genome sequencing, complete genome sequencing, or entire genome sequencing, is the process of determining the entirety, or nearly the entirety, of the DNA sequence of an organism's genome at a single time. [2]