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  2. 10–20 system (EEG) - Wikipedia

    en.wikipedia.org/wiki/10–20_system_(EEG)

    This MCN system uses 1, 3, 5, 7, 9 for the left hemisphere which represents 10%, 20%, 30%, 40%, 50% of the inion-to-nasion distance respectively. The introduction of extra letter codes allows the naming of intermediate electrode sites. Note that these new letter codes do not necessarily refer to an area on the underlying cerebral cortex.

  3. Total body surface area - Wikipedia

    en.wikipedia.org/wiki/Total_body_surface_area

    Total body surface area. Total body surface area ( TBSA) is an assessment of injury to or disease of the skin, such as burns or psoriasis . In adults, the Wallace rule of nines can be used to determine the total percentage of area burned for each major section of the body. [1]

  4. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    The sum of squares of residuals, also called the residual sum of squares: The total sum of squares (proportional to the variance of the data): The most general definition of the coefficient of determination is. In the best case, the modeled values exactly match the observed values, which results in and R2 = 1.

  5. Nixon shock - Wikipedia

    en.wikipedia.org/wiki/Nixon_shock

    v. t. e. The Nixon shock refers to the effect of a series of economic measures, including wage and price freezes, surcharges on imports, and the unilateral cancellation of the direct international convertibility of the United States dollar to gold, taken by United States President Richard Nixon in 1971 in response to increasing inflation. [1] [2]

  6. Boris Johnson - Wikipedia

    en.wikipedia.org/wiki/Boris_Johnson

    Boris v. Ken. v. t. e. Alexander Boris de Pfeffel Johnson (born 19 June 1964) is a British politician and writer who was Prime Minister of the United Kingdom and Leader of the Conservative Party from 2019 to 2022. He was previously Foreign Secretary from 2016 to 2018 and Mayor of London from 2008 to 2016.

  7. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    Because of the commutative property of multiplication, reversing expressions does not change the result; for example, 50% of 20 is 10, and 20% of 50 is 10. Variants of the percentage calculation. The calculation of percentages is carried out and taught in different ways depending on the prerequisites and requirements.