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  2. Radius of gyration - Wikipedia

    en.wikipedia.org/wiki/Radius_of_gyration

    Radius of gyration (in polymer science)(, unit: nm or SI unit: m): For a macromolecule composed of mass elements, of masses , =1,2,…,, located at fixed distances from the centre of mass, the radius of gyration is the square-root of the mass average of over all mass elements, i.e.,

  3. Fresnel zone - Wikipedia

    en.wikipedia.org/wiki/Fresnel_zone

    Several examples of how Fresnel zones can be disrupted. A Fresnel zone (English: / f r eɪ ˈ n ɛ l / fray-NEL), named after physicist Augustin-Jean Fresnel, is one of a series of confocal prolate ellipsoidal regions of space between and around a transmitter and a receiver.

  4. Tarung Derajat - Wikipedia

    en.wikipedia.org/wiki/Tarung_Derajat

    Tarung Derajat is officially recognized as a national sport and used as a basic martial art training for the Indonesian Armed Forces and Indonesian National Police. "Aku Ramah Bukan Berarti Takut, Aku Tunduk Bukan Berarti Takluk" , is the motto of the martial art which translates to "I am friendly but it does not mean I am afraid, I bow but it ...