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  2. Charles Dickens - Wikipedia

    en.wikipedia.org/wiki/Charles_Dickens

    Charles John Huffam Dickens (/ ˈ d ɪ k ɪ n z /; 7 February 1812 – 9 June 1870) was an English novelist and social critic who created some of the world's best-known fictional characters, and is regarded by many as the greatest novelist of the Victorian era.

  3. Decibel - Wikipedia

    en.wikipedia.org/wiki/Decibel

    The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel ( B ). It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 10 1/10 (approximately 1.26) or root-power ratio of 10 1/20 (approximately 1.12 ).

  4. Attention deficit hyperactivity disorder - Wikipedia

    en.wikipedia.org/wiki/Attention_deficit...

    0.8–1.5% (2019, using DSM-IV-TR and ICD-10) [2] Attention deficit hyperactivity disorder ( ADHD) is a neurodevelopmental disorder characterised by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and otherwise age ...

  5. Bayes' theorem - Wikipedia

    en.wikipedia.org/wiki/Bayes'_theorem

    Bayes' theorem is named after the Reverend Thomas Bayes ( / beɪz / ), also a statistician and philosopher. Bayes used conditional probability to provide an algorithm (his Proposition 9) that uses evidence to calculate limits on an unknown parameter. His work was published in 1763 as An Essay towards solving a Problem in the Doctrine of Chances.

  6. Enzo Ferrari - Wikipedia

    en.wikipedia.org/wiki/Enzo_Ferrari

    Enzo Anselmo Giuseppe Maria Ferrari Cavaliere di Gran Croce OMRI (Italian: [ˈɛntso anˈsɛlmo ferˈraːri]; 18 February 1898 – 14 August 1988) was an Italian motor racing driver and entrepreneur, the founder of the Scuderia Ferrari Grand Prix motor racing team, and subsequently of the Ferrari automobile marque.

  7. 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. 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; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...