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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.
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.
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.
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.
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.
우리나라가 체결한 FTA에서의 무역원활화 규정에 관한 고찰: 상품무역을 중심으로
임성철(Sung-Chul Lim) 한국무역연구원 2016 무역연구 Vol.12 No.5
Trade facilitation refers to all measures which expand international trade by increasing efficiency and reducing transaction costs by simplification or elimination of unnecessary and complicated procedures, practices, and associated infrastructure. This paper examines insufficient points of provisions of Trade Facilitation in FTAs concluded by Korea when compared to the provisions of trade facilitations defined by international organizations or FTAs of other countries. Currently, South Korea has FTAs with 15 countries already in force. Among the provisions in 11 of these FTAs is chapter on trade facilitation. A Korea FTA does not regulate measures of trade facilitation such as prohibition of consular transaction requirements, optional electronic payment, separation of release from final determination of customs duty, taxes, fees and charges, establishment and publication of average release times, movement of goods intended for import under customs control, prohibition of mandatory use of customs brokers, common border procedures and uniform documentation requirements, return of the rejected goods, temporary admission of goods and inward and outward processing, perishable goods, single window and freedom of transit. In future FTA negotiations it is suggested that it is necessary to negotiate the above-mentioned trade facilitation measures which have not yet been discussed.
NCS 기반 교육과정 도입에 따른 무역실무 교과과정 개편방향에 관한 소고
임성철(Sung Chul LIM) 한국무역상무학회 2016 貿易商務硏究 Vol.71 No.-
National Competency Standards (NCS) is the knowledge, technology and attitude a country has organized by its industry sectors and levels to necessary to fulfill the duties in the industrial filed. NCS has been standardized in the national dimension to successfully execute the duties of the industrial site. Currently,many universities of South Korea have opened courses on trade practices however, these courses are not consistent in the execution of criteria and unit of export-import management competency of the NCS and not established well-balanced. This study explains the concepts and structure of the NCS, analyzes the execution criteria and unit of export-import management competency of the NCSand presents the subjects that need to be reinforced or established in the future based on the current status of the curriculum. Departments of Trade practices need to recognize the changes in the trading environment, boldly straighten the existing subjects which overlap or do not conformto changes by using theNCSskills analysis and establish newcourses thatmatch for the era to recover original competitiveness of TradeDepartment.