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  2. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  3. Gray card - Wikipedia

    en.wikipedia.org/wiki/Gray_card

    A gray card is a flat object of a neutral-gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8 in × 10 in (20 cm × 25 cm) card and one 4 in × 5 in (10 cm × 13 cm) card, each with an 18% reflectance across the visible spectrum, and a white reverse side with a 90% reflectance.

  4. SMPTE color bars - Wikipedia

    en.wikipedia.org/wiki/SMPTE_color_bars

    SMPTE ECR 1-1978 (SDTV) In a SMPTE color bar image, the top two-thirds of the television picture contain seven vertical bars of 75% intensity. In order from left to right, the colors are white or gray, yellow, cyan, green, magenta, red, and blue. [18] The choice of white or gray depends on whether that bar's luminance is 100% or not.

  5. Ferrari 458 - Wikipedia

    en.wikipedia.org/wiki/Ferrari_458

    The Ferrari 458 Italia (Type F142) is an Italian mid-engine sports car produced by Ferrari. The 458 is the successor of the F430, and was first officially unveiled at the 2009 Frankfurt Motor Show. [5] [6] It was succeeded by the 488 GTB (Gran Turismo Berlinetta) in 2015. [7]

  6. Young gay Latinos see a rising share of new HIV cases ... - AOL

    www.aol.com/news/young-gay-latinos-see-rising...

    Latinos, who make up about 19% of the U.S. population, accounted for about 33% of new HIV infections, according to the Centers for Disease Control and Prevention. The analysis found Latinos are ...

  7. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    In statistics, the coefficient of determination, denoted R2 or r2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable (s). It is a statistic used in the context of statistical models whose main purpose is either the prediction of future outcomes or the ...

  8. Gamma ray - Wikipedia

    en.wikipedia.org/wiki/Gamma_ray

    However, the mass of this much concrete or soil is only 2030% greater than that of lead with the same absorption capability. Depleted uranium is sometimes used for shielding in portable gamma ray sources , due to the smaller half-value layer when compared to lead (around 0.6 times the thickness for common gamma ray sources, i.e. Iridium-192 ...

  9. Battle of Stalingrad - Wikipedia

    en.wikipedia.org/wiki/Battle_of_Stalingrad

    Kleist's counterattack caught the Soviet defenders off guard, with Timoshenko having committed his armored reserves to the Kharkov operation. In the ensuing Second Battle of Kharkov, Kleist's forces encircled and destroyed much of the forces of the Southern Front and the advancing Southwestern Front. The disaster at Kharkov was a crippling blow ...

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