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전자교반에 의한 Al 합금의 초정입자 미세화에 관한 연구
임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.5
N/A The change of microstructure of Al-7wt%Si alloy was examined by using a induction motor of 3-phases and 2-poles in semi-solid electromagnectically stirring process. The size and degree of sphericity of primary solid particles were observed by means of change of cooling rate. At a certain cooling rate, the size of primary solid particles increased and the sphericity became perfect, as the fraction of solid increased. The average size of primary solid particles was 43㎛ when the fraction of solid was 0.3 and at 600℃, input voltage 140V, cooling rate 2.5℃/s. It was shown that the size of primary solid particles was proportional to local solidification time.
투명세포육종의 세침흡인 세포학적 소견 - 1예 보고 -
임성철,정유경,김동출,이윤경,신은택,Lim, Sung-Chul,Chung, You-Kyung,Kim, Dong-Chool,Lee, Yoon-Kyung,Shin, Eun-Taik 대한세포병리학회 1998 대한세포병리학회지 Vol.9 No.2
Clear ceil sarcoma(CCS) is an uncommon soft tissue sarcoma that occurs in tendons and aponeuroses, usually of the lower extremities and is believed to be of neural crest origin that have a capability to produce melanin. These tumors commonly metastasize and have a very poor prognosis. The fine needle aspiration cytologic finding of CCS is not well documented. We recently experienced a case of CCS. The patient was a 54-year-old male with painful swelling of the right inguinal area. Fine needle aspiration cytology revealed polygonal or fusiform tumor cells with clear or granular cytoplasm and vesicular nuclei containing one or two nucleoli. Immunohistochemical staining for S-100 protein and HMB-45 revealed strong positivity and variable developing stages of premelanosomes were observed by electron microscopy in the excised specimen.
전자교반시 Al-7wt%Si 합금의 초정입자에 미치는 유동의 영향
임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.6
N/A In this study, to gain the semi-solid alloy we employed the electromagnetic rotation by a induction motor of 3-phases and 2-poles for Al-7wt%Si alloy and observed the size of primary solid particle, distribution state of primary solid particle, the degree of sphericity, and fraction of primary solid for the evaluation of its results. The size of primary solid particle increases from 98㎛ to 118㎛ as solid fraction increases from 0.2 to 0.5. The degree of sphericity increased as the solid fraction increased. Solid particles obtained from the microstructures of isothermally held sample were coarsened and the degree of sphericity was enhanced as isothermal holding time increased. However, when the sample was stirred for more than 40min, solid particles merged together and liquid phase was entrapped within the cluster of solid particles. The size of primary solid particle was not changed significantly with the variation of input voltages by 160V over which solid particles began to merge together to be a large cluster of about 170㎛ at 180V. The standard deviation and the degree of sphericity were not changed significantly with the variation of input voltage.
3개 침제조회사 침구(鍼具)에 대한 침감지표 비교 - 이중 맹검 무작위 배정법 -
임성철,서정철,김경운,서보명,김성웅,이세연,정태영,한상원,이현,Lim, Seong-chul,Seo, Jung-chul,Kim, Kyung-un,Seo, Bo-myung,Kim, Sung-woong,Lee, Se-youn,Jung, Tae-young,Han, Sang-won,Lee, Hyun 대한침구의학회 2004 대한침구의학회지 Vol.21 No.6
Objective : This study was designed to compare acupuncture sensation index among three different acupuncture devices. Methods : A, B and C acupuncture devices were inserted into Quchi(LI 11) of the subjects. After 5 minutes the subjects completed a questionnaire rating the intensity of 21 kinds of acupuncture sensation; hurting, penetrating, sharp, aching, intense, spreading, radiating, tingling, pricking, stinging, pulling, heavy, dull, numb, electric, shocking, hot, burning, cool, pulsing, and throbbing. We compared subjective evaluations of acupuncture sensation among the groups. Results : The acupuncture sensation index when administrated among three different acupuncture devices(A, B and C) was not significantly different. The acupuncture sensation of B acupuncture devices showed significant difference than A or C in Spreading, Dull, Numb item. But, the other items of acupuncture sensation were not significantly different among three acupuncture devices. Conclusions : We found that acupuncture sensation index when administrated among three different acupuncture devices. Further study is needed to know different acupuncture sensation among acupuncture devices.
고대(古代)의 경복진단법(經服診斷法) 중 십이경맥(十二經脈) 맥진(脈診)에 관(關)한 연구(硏究)
임성철,손성철,이경민,황민섭,김갑성,윤종화,Lim, Seong-cheol,Son, Seong-cheol,Lee, Kyung-min,Hwang, Min-seob,Kim, Kap-sung,Yoon, Jong-hwa 대한침구의학회 2002 대한침구의학회지 Vol.19 No.5
Objective : The study of relations between twelve meridians and pulse diagnosis Method : The possiblity of pulse diagnosis on the pulse points(脈動處) of each meridian through the scription of $\ll$Maek beop(脈法)$\gg$ $\ll$Nae kyeong(內經)$\gg$ and $\ll$Nan kyeong(難經$\gg$ Result : The comparative pulse diagnosis method(比較脈診法) in the scription of $\ll$Mack beop$\gg$ progressed to the five Jang bu maek(五臟脈) in the scription of $\ll$Young chu : Sa gi jang bu byeong hyeong(靈樞 邪氣臟腑病形)$\gg$ in accordance with the progress of pulse diagnosis and the theory of medicine. Conclusions : The comparative pulse diagnosis method in the scription of $\ll$Mack beop)$\gg$ progressed to the five Jang bu maek(五臟脈) in the scription of $\ll$Young chu : Sa gi jang bu byeong hyeong$\gg$ and the moxibustion and Pyum bup(貶法) in the scription of $\ll$Mack beop$\gg$ altered to acupuncture therapy on the five shu points(五輸穴)
전자교반시 미세화제첨가에 따른 Al-7wt%Si 합금의 미세조직변화
임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.5
N/A To gain a semi-solid alloy the electromagnetic stirring by an induction motor of 3 phase and 2-poles was used. And it was also observed that the change of primary particle size, distribution and degree of sphericity by addition of a refiner, Al5Ti1B. The effect of refiner on the distribution and dimensions of primary particles prior to that electromagnetic refining on those was examined. In case of electromagnetic stirring with the refiner Al5Ti1B, the average size of primary solid particles increased as the fraction of solid increased. However it decreased as the amount of Al5Ti1B addition increased to 0.5% and then it was increased again as the addition amount of Al5Ti1B increased above 1.0%. The average size of primary solid particles was 31㎛ in case of melt temperature 600℃ when the fraction of solid was 0.3, input voltage 140V, cooling rate 2.5℃/s, and 0.5% Al5Ti1B. To use the electromagnetic stirring with the addition of a refiner was able to obtain more small primary solid particles than to use the electromagnetic stirring only.
임성철(Sung-Chul Lim),김기주(Kijoo Kim),황재훈(Jaehoon Whang) 한국산업정보학회 2009 한국산업정보학회논문지 Vol.14 No.5
급변하는 환경변화에 신속하고 능동적으로 대처하고 경영관리의 효율성을 제고시키기 위한 중요한 요소로 ERP(Enterprise Resource Planning: 전사적 자원관리)는 전략적 차원에서 경쟁력 강화 방안으로 널리 구축되어 왔다. 본 연구는 공기업의 구축에서의 핵심성공요인들을 도출하기 위해 국내의 대표적인 공기업, KOGAS의 ERP시스템 구축 사례를 대상으로 실증 분석을 수행하였으며, 분석결과는 다음과 같다. 첫째, 시스템 관리가 잘 되고 기관장의 의지가 높을수록 비용 및 시간 감소 성과에 긍정적인 영향을 미치는 것으로 나타났으며, 둘째, 시스템 관리가 잘 되고 사용자의 참여 수준이 높으며 기관정의 의지가 높을수록 경영과 정보환경 개선 성과에 긍정적인 영향을 미치는 것으로 나타났다. In the ways of coping with the rapidly changing environment, the information technology is recognized a critical factor in order to rethink the effectiveness of business management, and enterprise resource planning (ERP) system has emerged as an essential method for strengthening the competitiveness on the strategic level. This empirical study has revealed the following. First, well-organized system management and the strong will and leadership of top management have significantly positive influence on the reduction of cost and time. Second, system management, users’ participation, and the strong will and leadership of top management have significantly positive influence on the improvement of management and informational environment. It also proposes the guidelines of how to establish an ERP system successfully in the public enterprises.
Estradiol valerate와 Letrozole에 의해 유발되는 다낭성난소증후군의 난소변화 비교
임성철 ( Sung Chul Lim ),정문진 ( Moon Jin Jeong ),김세은 ( Se Eun Kim ),김승현 ( Seung Hyun Kim ),김삼철 ( Sam Cheol Kim ),서승용 ( Seung Yong Seo ),김탁 ( Tak Kim ),강성수 ( Seong Soo Kang ),배춘식 ( Chun Sik Bae ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.6
목적: 다낭성난소증후군(polycystic ovary syndrome, PCOS)을 estradiol valerate (EV)와 letrozole (LE)로 유발할 수 있는데 인간의 다낭성난소증후군과 가장 유사한 질환동물 모델이 무엇인가를 알아보고자 하였다. 연구방법: EV와 LE를 각각 랫드에 처리하여 PCOS를 유발시킨 후 희생시켜 난소를 적출하였다. 난소를 조직학적으로 관찰하여 다낭성 난소 변화 유발유무, 난소의 크기, 난포낭의 크기 및 수를 측정하고 난포 및 간질세포의 황체화 등을 비교 관찰하였다. 결과: LE처리군은 EV처리군에 비하여 난소의 크기 및 난포낭의 수가 유의하게 증가하고 난포막세포의 황체화가 뚜렷하여 인간의 PCOS와 더유사한 소견을 보였다. 결론: 랫드에서 LE처리에 의한 PCOS는 PCOS질환유발 동물 모델로 더 적합한 것으로 평가된다. Objective: To compare ovarian morphology of the estradiol valerate (EV)-and the letrozole (LE)-induced polycystic ovary syndrome (PCOS) in rat models. Methods: EV were injected (IM) to 10 Sprague-Dawley rats and LE were administered (PO) to the other 10 Sprague-Dawley rats for 21 days. Sixty days after single injection of EV and 21 days after LE administration, the animals were sacrifi ced and the ovaries were sectioned, measured and analyzed histopathologically. Results: LE-treated group showed larger ovary bearing more abundant cystic follicles with luteinized theca cells. These fi ndings were more similar to human PCOS ovarian morphology. Conclusion: LE-induced PCOS model is recommended to conduct PCOS-related animal experiments.
포도근 약침액이 LPO, RNS 및 Cytochrome P450에 미치는 효과
임성철 ( Seong Cheorl Lim ),김혁 ( Hyuck Kim ),이효승 ( Hyo Seung Yi ),박원환 ( Won Hwan Park ),문진영 ( Jin Young Moon ) 대한경락경혈학회 2007 Korean Journal of Acupuncture Vol.24 No.1
Objectives: In this study, we determinated protective effects of Vitis labrusca Root herbal-acupuncture solution (VLHA) against atherosclerosis and cardiovascular disease induced by oxidative damage and cytochrome P450 (CYP) induction. Methods: Antioxidant capacity of VLHA were evaluated by the β-carotene/linoleic acid emulsion system and FeCl2-ascorbic acid stimulated lipid peroxidation in rat liver homogenate, respectively. Scavenging effects of VLHA on ONOO- and NO were measured by DHR 123, DAF-2 assay. Furthermore, we measured inhibitory activity of VLHA on CYP 2E1 in rat liver microsome using by Aniline assay. Results: VLHA exhibited potent inhibition rate(74%) on FeCl2-ascorbic acid induced lipid peroxidation, and revealed a strong scavenging effects on ONOO- and NO. In addition, VLHA showed inhibitory effect on CYP 2E1. Conclusions: The present study concludes that our results suggest that VLHA could be used as a good source in the prevention of atherosclerosis and alcoholic liver injury.