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D-value may refer to: *D-value (microbiology) - the ''decimal reduction time'', the time required at a certain temperature to kill 90% of the organisms being studied *D-value (meteorology) in meteorology refers to the deviation of actual altitude along a constant pressure surface from the standard atmosphere altitude of that surface. *D-value (transport) - a rating in kN that is typically attributed to mechanical couplings *Cohen's d in statistics - The expected difference between the means between an experimental group and a control group, divided by the expected standard deviation. It is used in estimations of necessary sample sizes of experiments. *''d','' a sensitivity index. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「D-value」の詳細全文を読む スポンサード リンク
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