Physical principle used in reliability
نویسندگان
چکیده
منابع مشابه
Reliability and validity of two frequently used self-administered physical activity questionnaires in adolescents
BACKGROUND To create and find accurate and reliable instruments for the measurement of physical activity has been a challenge in epidemiological studies. We investigated the reliability and validity of two different physical activity questionnaires in 71 adolescents aged 13-18 years; the WHO, Health Behaviour in Schoolchildren (HBSC) questionnaire, and the International Physical Activity Questi...
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متن کاملPhysical Principle of Optical Tweezers
The radiation pressure of light was first deduced theoretically by James C. Maxwell in 1873 based on his electromagnetic theory [1, 2], and measured experimentally by Lebedev [3], and Nichols and Hull in 1901 [4]. The radiation pressure force exerted on a totally reflecting mirror by an incident beam of light perpendicular to the mirror is Fmirror = 2P/c, where P is the power of the light and c...
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ژورنال
عنوان ژورنال: iScience
سال: 2021
ISSN: 2589-0042
DOI: 10.1016/j.isci.2020.101945