전자교반에 의한 Al 합금의 초정입자 미세화에 관한 연구

임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.5

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 미세화제첨가에 따른 Al-7wt%Si 합금의 미세조직변화

임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.5

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.

전자교반시 Al-7wt%Si 합금의 초정입자에 미치는 유동의 영향

임성철,윤의박 ( Sung Chul Lim,Eui Pak Yoon ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.6

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.

만성폐쇄성 폐질환 환자에서 M-mode 초음파로 측정한 횡격막 운동

임성철 ( Sung Chul Lim ),장일권 ( Il Gweon Jang ),박형관 ( Hyeong Kwan Park ),황준화 ( Jun Hwa Hwang ),강유호 ( Yu Ho Kang ),김영철 ( Young Chul Kim ),박경옥 ( Kyung Ok Park ) 대한결핵 및 호흡기학회 1998 Tuberculosis and Respiratory Diseases Vol.45 No.4

UNCITRAL 전자양도성기록 모델법의 전자선하증권 적용에 관한 소고

임성철(Sung-Chul LIM) 한국무역상무학회 2018 貿易商務硏究 Vol.79 No.-

A primary reason that e-trade has not been prevalent is because there is no international consensus on how to recognize the electrical transfer of bill of lading. UNCITRAL enacted the Model Law on Electronic Transferable Records to promote the international transfer of electronic document or instrument such as electronic bill of lading and to ensure legal stability. The model law was enacted based on the principle of non-interference the substantive law, technological neutrality, and functional equivalence. The model law introduced the concept of ‘control’ in order to prevent the unauthorized duplication of electronic transferable records in electronic environments as infinite replication is possible and to apply the concept of possession, which is equivalent to paper-based transferable document or instrument or the factual dominance of transferable document or instrument, into electronic environments. The analysis of the possibility of collision between the electronic bill of lading of Bolero, essDOCS, e-B/L KOREA and the model law suggested that the majority of the model law did not conflict with or contradict the currently commercialized electronic bill of lading service. This is because the lawreferred to the existing electronic bill of lading in process and observed the technology-neutral principle during enactment. Replacement of a transferable document or instrument with an electronic transferable record needs to be improved for the exiting electronic bill of lading service. The model law is significant in that it not only gained international attention for the transfer of electronic bill of lading, but also has become the benchmark for enacting legislations on electronic document or instrument in each country. However, the model law is limited to a simple recommendation as we have seen from cases about UNCITRAL Model Law on Electronic Commerce and Model Law on Electronic Signatures. In order for electronic bill of lading to be as internationally prevalent as the paper ones, there needs the convention, something that goes beyond the model law. The prevalence of electronic bill of lading would be quicken if organizations that are influential in international trade such as UNCITRAL, International Maritime Organization (IMO), World Customs Organization (WCO), International Chamber of Commerce (ICC) should take initiatives towards the convention or agreement. An alternative could be mutually recognizing the use of electronic bill of lading among the FTA countries by adding the relevant clauses in their agreements.

중학교 2학년 과학영재들의 자유탐구 활동에서 나타난 과학적 추론 능력 분석

임성철 ( Sung Chul Lim ),김진화 ( Jin Hwa Kim ),정진우 ( Jin Woo Jeong ) 경북대학교 과학교육연구소 2013 과학교육연구지 Vol.37 No.2

The purpose of this study was to analyze the scientific reasoning ability during open-inquiry activities of science-gifted 2nd middle school students. Open-inquiry activity is similar to process of scientists` science knowledge generation. Identifying and analyzing the scientific reasoning process and the scientific reasoning ability during open-inquiry activities of science-gifted students, will be able to provide implications for future research. CSRI Matrix(Dolan & Grady, 2010) was used to analyze the complexity of the scientific reasoning ability. The higher degree of complexity of the scientific reasoning is similar to process of scientists` science knowledge generation. The results showed that each process of the open-inquiry activities were distributed by various steps of complexity of the scientific reasoning. Particularly, ‘The generating questions’ and ‘Connecting data to the research question’ were ‘most complex`` step in all teams. On the other side, ‘Posing preliminary hypotheses’, ‘Selecting dependent and independent variables’, ‘Considering the limitations or flaws of their experiments’ were low steps in most teams. And ‘Communicating and defending findings’ was distributed by most various steps of complexity of the scientific reasoning.

표피낭속 보웬병: 증례 및 문헌고찰

임성철(Sung-Chul Lim) 조선대학교 의학연구원 2021 The Medical Journal of Chosun University Vol.46 No.1

Bowen disease (BD) is a squamous cell carcinoma in situ on sun exposed or protected skin. Epidermal cyst (EC) of the skin is a very common cutaneous lesion. BD occurs in EC very rarely. A 53-year-old Korean female was visited because of 2.2x1.4 cm hyperpigmented plaque on the right inguinal area. This lesion has been found 2-3 years ago and thickened recently. An excisional biopsy showed epidermal BD involving EC. On serial section, epidermal BD did not demonstrate communication with EC. Immunohistochemically, atypical squamous cells of the epidermis and EC were positive for pancytokeratin AE1/3, cytokeratin (CK)-5/6, Ki-67, p40, p53, p63, and p16. They were negative for CK7, CK20, Melan A, and HMB45. Radical excision by Mohs surgery with modified keystone flap was done. To the best of the author’s knowledge, this is the first case report of BD involving EC which is associated with HPV infection.

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.