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Bruce Harding is a gemstone cutter and mechanical design engineer and mathematician. He received the Lapidary Award of the Eastern Federation of the Mineralogical and Lapidary Society in 1975. That same year, in an article on "Faceting Limits" in ''Gems and Gemology'', the magazine of the Gemological Institute of America, he identified the effect of an observer's head blocking rays of illumination for the main facets of a number of gem materials, including diamonds.〔(Faceting Limits )〕 In 1986 Harding developed one of the earliest software programs to perform ray path analysis. Harding was a speaker at the International Diamond Cut Conference (IDCC) in Moscow in 2004.〔(1st International Diamond Cut Conference )〕 ==References== *(Diamond Design Revisited ) *(Fractioning of Color by a Gem ) *(Cutting Ovals ) *(Scallops ) *(Grading the Princess Cut ) Many articles in "Lapidary Journal", "Rock & Gem Magazine" circa 1973-1980 Mathematical articles include: .. "A Derivation of Grashov's Law", Mechanical Engineering News, circa 1960 - uses an interesting manipulation of absolutes and inequalities. .. "Hesitation", ASME Kinematics Conference 1964 - shows approximate dwells in mechanisms and theory of consecutive zero derivatives; discusses analysis of 'chain derivatives' in composite mechanisms and motions. .. "Inverse Derivatives", Mechanical Engineering News, circa 1965 - used dimensional notation and showed usefulness on inverse functions; text garbled by editor; reprinted and re-garbled by next editor in next issue..... Bruce L Harding, 2013 Jan 19 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「Bruce Harding」の詳細全文を読む スポンサード リンク
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