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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  3. Huns - Wikipedia

    en.wikipedia.org/wiki/Huns

    Roman writers repeated a tale that the Huns had entered the domain of the Goths while they were pursuing a wild stag, or else one of their cows that had escaped, across the Kerch Strait into Crimea. Discovering the land fertile, they then attacked the Goths. [ 12 ]

  4. Yield to maturity - Wikipedia

    en.wikipedia.org/wiki/Yield_to_maturity

    An ABCXYZ Company bond that matures in one year, has a 5% yearly interest rate (coupon), and has a par value of $100. To sell to a new investor the bond must be priced for a current yield of 5.56%. The annual bond coupon should increase from $5 to $5.56 but the coupon can't change as only the bond price can change.

  5. Raised-cosine filter - Wikipedia

    en.wikipedia.org/wiki/Raised-cosine_filter

    The raised-cosine filter is an implementation of a low-pass Nyquist filter, i.e., one that has the property of vestigial symmetry. This means that its spectrum exhibits odd symmetry about 1 2 T {\displaystyle {\frac {1}{2T}}} , where T {\displaystyle T} is the symbol-period of the communications system.

  6. Chernobyl disaster - Wikipedia

    en.wikipedia.org/wiki/Chernobyl_disaster

    Some sources report a total initial fatality of 31, [189] [190] including one additional off-site death due to coronary thrombosis attributed to stress. [ 7 ] Most serious ARS cases were treated with the assistance of American specialist Robert Peter Gale , who supervised bone marrow transplant procedures, although these were unsuccessful.

  7. Manchester code - Wikipedia

    en.wikipedia.org/wiki/Manchester_code

    Manchester coding is a special case of binary phase-shift keying (BPSK), where the data controls the phase of a square wave carrier whose frequency is the data rate. . Manchester code ensures frequent line voltage transitions, directly proportional to the clock rate; this helps clock

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