• Journal of the Korean Applied Science and Technology
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• v.38 no.1
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• pp.1-8
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• 2021

The purpose of this study was to analyze relationship between biomechancal factors and diver's distance during golf driver swing. Fifteen professional golfers were participated in as subject. Eight motion capture cameras(250 Hz), 2 force plates(1000 Hz), and Trackman were used to collect kinematic and kinetic datas. It was performed Pearson's correlation analysis using SPSS 24.0. The level of significance was at .05. Ball speed, club head speed, X-Factor, and ground reaction force were correlated on driving distance, However, smash factor and knee moment were not correlated on driving distnace. Ball speed, club head speed, X-Factor, and ground reaction force were effected to driving distance, but smash factor and knee moment were not effected to driving distance.

• Venture DIGEST
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• s.54
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• pp.24-25
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• 2004

협회와 전자신문이 공동주최하는‘제9차 벤처CEO포럼’이 지난 8일 코엑스인터컨티넨탈호텔에서‘북미진출, 효과적인 마케팅 전략과 전술’이라는 주제로 열렸다. 기업컨설팅 전문기업인 론치패드 레드사의 미카 리 대표가‘춘향이 마돈나 만들기’라는 주제로, 미국 팩터링 기업인 하나파이낸셜의 앤드류 조 상무는‘미국 수출금융 활용법’이라는 주제로 발표했다. 또 주한 미국상공회의소 사모펀드∙벤처캐피탈 상임위원회 이정호 위원장은‘투자유치를 위한 기업가치 백배 올리기’로 주제로 발표했다.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.9
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• pp.80-89
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• 1997

Die sinking electrical discharge machining(EDM) was conducted for ceramic composite of 33 weight percent TiC based on AI$_{2}$O$_{3}$ ceramic matrix according to the change of current and duty factor(DF). Material removal rate(MRR) was increased as the current and the duty factor increased, but better surface mor-pholoty was obtained in the region of lower current and duty factor. From the scanning electron microscopy(SEM) photographs and the energy dispersive X-ray spectroscopy(EDX) of the EDMed surface, EDM trace formed by one discharge spark was analyzed. Although the bending strength after EDM was highly decreased, reliability obtained by weibull analysis was increased twice. The bending strength was recovered or more by barrel polishing after EDM. From the FEM analysis of temperature for one spark, the possible melting region of AI$_{2}$O$_{3}$and TiC was obtained.