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The ke () is a time unit in traditional China. The ''ke'' is the extension of the scale〔F. Richard Stephenson and David A. Green; ''Historical supernovae and their remnants'', Oxford University Press, Oxford (2002), pages 15-16. ISBN 0-19-850766-6〕 on the sundial or the rule of the water clock.〔According to the ''Shuowen Jiezi'' from ''Xu Shen'', “漏以铜壶盛水，刻节，昼夜百刻。” Translation: “The water clock holds the water in the copper pot, and marks the scale on the rule. there're 100 scales which represents a day.”〕 In French decimal time, ''ke'' is equivalent to 10 decimal minutes, sometimes called a ''décime''. The major ''ke'' is 14.4 minutes (14 minutes 24 seconds), which is the time between two centiday scales, and the minor ''ke'' is 2.4 minutes (2 minutes 24 seconds),〔600 is the LCM of 100 and 24, so the time between centiday and ''shi'' scale may be , , , , or major ''ke''. The major ''ke'' is the common factor〕 which is the common factor time between centiday scale and ''shi'' scale. It was customary to subdivide the minor ''ke'' into 10 ''fen'' (), just as ''cun'' and ''mace''; thus the major ''ke'' is divided into 60 ''fen''. There were various attempts to redefine a day to 96, 108, or 120 ''ke'', in order to abolish the minor ''ke''. During the Qing dynasty around the time of the arrival of Jesuit missionaries, the ''ke'' was finally redefined to day, or ''shi'', or a quarter of an hour. And ''fen'' is currently used to refer to of an hour, or 1 minute. == See also == * Chinese calendar * Decimal time 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「Ke (unit)」の詳細全文を読む スポンサード リンク
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