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이상화,이호인 ( Sang Hwa Lee,Ho In Lee ) 한국공업화학회 1993 공업화학 Vol.4 No.3
담지된 백금촉매에 주석의 첨가는 포화탄화수소의 탈수소고리화 반응에 대한 촉매의 활성 및 안정도의 현저한 증가를 가져왔다. n-octane의 탈수소고리화 반응에서 0.75wt%의 Pt에 대해 주석의 몰비가 약 4일 때 가장 높은 촉매적 활성을 나타냈다. 또한 K의 첨가도 n-hexane의 탈수소고리화 반응에 대해 주석과 비슷한 효과를 나타내었다. n-octane의 전환반응의 경우에는, K의 첨가 효과가 적게 나타났다. The addition of Sn to Pt/γ-Al_2O_3 catalyst greatly enhanced the activity and decreased the deactivation rate for the dehydrocyclization of paraffins. For the dehydrocyclization of n-octane, there appeared to be an optimal ratio of Pt:Sn= 1 :4 for 0.75 wt% Pt/γ-Al_2O_3 catalyst. The addition of K to Pt/γ-Al_2O_3 also produced a similar effect on the dehydrocyclization of n-hexane. In the case of n-octane, the addition of K led to a less selective catalyst.
노동현장 기준데이터 제시를 위한 손근육의 근활성도 및 근피로도에 관한 연구
金慶鉉(Kyoung-Hyun Kim),李浩龍(Ho-Yong Lee),辛華詠(Hwa-Young Shin),鄭聖勳(Seong-Hun Jeong),金成煥(Sung-Hwan Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.12
In this paper, muscular activity and muscle fatigue of FDI (first dorsal interosseous muscle) and thenar muscle of hand was analyzed with surface EMG signal based on four kinds of attitudes (grip, tip, key and palmar) to measure grip strength and pinch strength after hand operation and rehabilitation treatment. The normative data are needed to interpret evaluation data to assess a patient's ability to return to labor environment. The preceding researchers proposed the standard data only by studying on maximum grip strength and the maximum pinch strength followed by each attitude of subjects' hands. But in this study, Ole muscle activity and muscle fatigue were considered under the various attitude to propose normative data. As a results, the muscle fatigue may be used only for presentation of normative data in labor environment.