3차원 입체 모니터 개발 동향

강승철(Kang Seung Chul) 한국콘텐츠학회 2008 한국콘텐츠학회지 Vol.6 No.1

차세대 이동통신망의 효율적인 이동성 관리 기능 설계

강승철(Seung-Chul Kang),민상원(Sang-Won Min) 한국통신학회 2002 한국통신학회 학술대회논문집 Vol.2002 No.11

[적층제조시스템 부문] 적층제조 KS 표준화 동향

강승철(Seung Chul Kang) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월

적층제조 및 3D프린팅 분야 국제표준은 ISO/TC 261 (Additive Manufacturing)과 ISO/IEC JTC 1/ WG 12 (3D Printing and Scanning)에서 주로 개발하고 있으며, ISO와 IEC 하위 일부 기술위원회(TC)에서도 해당 분야의 요구사항에 따라 국제표준을 개발하고 있다. 본 발표에서는 적층제조 기술의 다양한 세부사항에 대해 가장 많은 국제표준을 개발하고 있는 ISO/TC 261 중심으로 국제표준화 동향을 살펴보고 한국에서의 적층제조 분야 KS개발 동향을 알아보고자 한다. ISO/TC 261은 2011년에 설립되었으며, 간사국은 독일(DIN)이다. 용어, 장비·소재·소프트웨어 및 공정, 테스트, 품질검증 등 적층제조 전반에 걸쳐서 표준화를 진행하고 있으며, 현재 8개의 작업반(Working Group, WG)에서 총 31개의 프로젝트 그룹(Joint Group, JG)을 운영하고 있다. 8개 WG에는 항공우주, 플라스틱, 의료 관련 기술위원회와 공동으로 표준을 개발하는 JWG (Joint Working Group)가 3개 포함되어 있다. 지난 10년간 총 19종의 표준을 제정(International Standard, IS)하였고, 현재 35종의 표준을 개발하고 있다. 투표권을 가진 P-멤버는 26개국이고, 한국은 2015년부터 P-멤버로 등록하고 활동하고 있다. 또한 ISO/TC 261에서 추진하는 국제표준 개발에 대응하기 위해 국가기술표준원(KATS)에서는 적층제조 전문위원회 간사기관 및 표준개발협력기관(COSD)으로 3D융합산업협회(3DFIA)를 지정하여 관련 업무를 진행하고 있다. 현재 적층제조 전문위원회는 산·학·연 전문가 19명으로 구성되어 있으며, ISO/TC 261에서 추진 중인 국제표준 개발 건에 대한 투표의견을 제시하고, 우리나라 전문가가 제안한 국제표준에 대한 검토 및 의견 제시, 국제표준화 활동에 대한 기술 자문 등을 수행한다. 2017년부터 전문위원회와 COSD를 중심으로 3D프린팅 분야 국가표준(KS)을 확충하기 위해 ISO/TC 261에서 발간한 국제표준의 KS 부합화 활동을 수행하고 있으며, 가장 기본이 되는 용어 표준을 시작으로 일반원칙에 해당하는 표준의 도입을 우선적으로 도입하고 있다. 현재 총 8종의 ISO/TC 261 발행 국제표준이 KS 부합화를 통해 국가표준으로 제정되었으며, 2021년 10월 기준으로 4종의 부합화 표준이 심의 중에 있다. 그리고 한국건설생활환경시험연구원(KCL)이 제안한 재료압출방식 데스크톱 3차원 프린터 유해물질 방출량 측정방법, 금속 분말 소재 적층물에 대한 기계적 성능평가, 폴리머 소재에 대한 물리·화학적 성능평가, 산업용 AM 장비구동 성능평가항, 산업용 AM 장비구동 성능평가, 비산업용 3차원 프린터(재료 압출) 성능평가, 비산업용 3차원 프린터(액조광경화) 성능평가, 플라스틱 적층물에 대한 기계적 성능평가 등 7종의 적층제조 관련 고유표준도 심의 중에 있으며, 2021년도 기술심의를 통과하게 되면 부합화 표준 12종과 고유표준 7종 등 총 19종의 적층제조 분야 KS가 제정된다.

골반내 방선균증의 1 예

강승철(Seung Chul Kang),강인구(In Goo Kang),이상언(Sang Un Lee),권순철(Soon Chul Gwon),박현락(Hyun Rak Park),윤병목(Byung Mok Yoon),원석(Suk Won),백영철(Young Chul Baek),박정근(Jung Geun Park) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.11

Actinomycosis is an oppoturnistic infection of actinomyces, which are relatively avirulent endogenous oral commensals. After trauma or infection, they breach the normally protective mucosal barriers to invade adjacent soft tissue structures. Lesions routinely contain other bacteria, the normal resident flora at the site of primary infection, which act synergistically with actinomyces species to provoke this unique infection, which range from an acute suppurative process to a chronic fibrotic process. According to epidemic studies about pelvic actinomycosis, it should be significantly related to IUD(intrauterine device). It is accounted that IUD cause chronic intrauterine infection, tissue injury and act as nucleus for parasitic infestation. Here we present a case of pelvic actinomycosis related to IUD with brief review of the concerned literature.

교근 비대 환자에서 보툴리눔 A형 독소 주사 효과의 장기적 평가

홍희숙,강승철,김종열,김성택,Hong, Hee-Suk,Kang, Seung-Chul,Kim, Chong-Youl,Kim, Seong-Taek 대한안면통증구강내과학회 2005 Journal of Oral Medicine and Pain Vol.30 No.1

In this experiment, eleven volunteers were followed up for 15 months after the injection of botulinum toxin type A on right and left masseter muscles. The measurement of masseter muscle atrophy for each volunteer was performed by CT(computed tomography) three times: before the injection, three and fifteen months after the injection. The thickness and area of muscle were measured in three positions which are 10 (position 1), 20 (position 2), and 40 mm (position 3) above the inferior border of mandible(the injection site was nearest the position 1). The thickness of masster muscle was decreased in all three positions three months after the injection, but no significant change was observed fifteen months after the injection. On the other hand, the area of masster muscle was decreased in all three positions three months after the injection. Furthermore, the area was decreased significantly in positions 1 and 2, but not in position 3 fifteen months after the injection. As a result, toxin is still in effect even fifteen months after the injection. Finally, the present study shows that the measurement of muscle area provides more precise informations than that of muscle thickness does.

전산화 단층촬영으로 평가한 교근에 대한 보툴리눔 A형 독소주사와 교합안정장치의 효과

장희영,강승철,김성택,김종열,최종훈,Jang, Hee-Young,Kang, Seung-Chul,Kim, Seong-Taek,Kim, Chong-Youl,Choi, Jong-Hoon 대한안면통증구강내과학회 2005 Journal of Oral Medicine and Pain Vol.30 No.2

The purpose of this study is to evaluate the effect of botulinum toxin type A on masseter muscle atrophy and the extent of masseter muscle affected from the injection site in relation to injection dose, with and without occlusal splint therapy through computed tomographic measurement. 32 volunteers were divided into four groups - group 25U (injection dose of 25 unit), group 25Us (injection dose of 25 unit with occlusal splint), group 35U (injection dose of 35 unit), group 35Us (injection dose of 35 unit with occlusal splint). Each group consisted of 8 people. 3 positions (position 1, 2, 3 - 10mm, 20mm and 40mm from the inferior border of the mandible, respectively) were selected for the evaluation of the masseter muscle change. The following results were obtained. 1. The thickness and the cross-sectional area of the masseter muscle had reduced in all groups except for the right side thickness at position 3 of group 25U and group 25Us, and the right side thickness as well as the left side cross-sectional area at position 3 of group 35Us. In group 35Us, the thickness and the cross-sectional area of the masseter muscle had reduced significantly in all positions (P < 0.05). 2. There was no significant difference in the masseter muscle change between the injection dose of 25unit and that of 35unit. 3. The groups with occlusal splint showed greater reduction of the masseter muscle thickness than the other groups (P < 0.05). From the above results, botulinum toxin type A injection together with occlusal splint therapy in the treatment of masseter muscle hypertrophy would be clinically effective.

자궁경시술 중 발생한 공기 색전증 1 예

권순철(Soon Chul Kwon),강인구(In Gu Kang),김태우(Tae Woo Kim),강승철(Seung Chul Kang),원석(Seok Won),박정근(Jeong Keun Park) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.10

Complications from hysteroscopy are relatively rare events. They occur more frequently with operative hysteroscopy than with diagnostic hysteroscopy. Air embolism is a rare but devastating complication of hysteroscopy that rightly receives attention as a frightening, sudden, and potentially fatal hazard in otherwise healthy women. We experienced one case of air embolism during diagnostic hysteroscopy for abnormal uterine bleeding under general anesthesia. Early diagnosis and prompt treatment seem to be the keys to prevention of catastrophic outcomes and the hysteroscopists must understand the pathophysiology of air embolism to prevent, diagnose, and manage this potentially disastrous problem effectively.

고객 접점에서의 CRM 활동이 관계혜택을 매개로 행동의도에 미치는 영향

장원용(Yuanrong Zhang),강승철(Seung Chul Kang),민대환(Daihwan Min) 한국IT서비스학회 2011 한국IT서비스학회지 Vol.10 No.2

After ten years from the introduction of CRM systems, many companies reevaluate CRM from the perspective of customers. This paper classifies CRM activities at the contact points with customers and investigates the effect of CRM activities on perceived benefits and the effect of perceived benefits on behavioral intention in the Korean cosmetic industry. The result showed that contact management and complaint handling affected social benefits and that customers perceived confidence benefits from contact management, complaint handling, and churn management. Special treatment benefits were affected by all CRM activities including compensation management. Finally, all kinds of benefits had effects on behavioral intention such as recommendation intention and repurchase intention.

자궁각 임신의 임상적 고찰 및 치료적 골반경 수술의 연구

박현락(Hyen Rak Pak),권순철(Soon Chul Kwon),강인구(In Goo Kang),이상언(Sang Eon Lee),김태우(Tae Woo Kim),강승철(Seung Chul Kang),원석(Seok Won),박정근(Jeong Keun Park) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.10

Most of treatments have been performed laparotomy, but the rapid advances in laparoscopic operative and laboratory techniques and instrument allowed to apply laparoscopic surgery to this disease. We have reviewed 342 cases of ectopic pregnancy from march 1994 to march 2001.The cornual pregnancies were 21 case (6.1%), and the laparoscopic management in 11 cases. The mean gestational age at the time of laparoscopic surgery was 9.1 1.2 (n=11) weeks, and laparotomy was 9.4 1.3 (n=10) weeks. There were no significant difference. The mean operation time of laparoscopic surgery was 72.8 25.5minutes, and laparotomy was 68.3 24.3minutes. The mean hospital days of laparoscopic surgery were 4.9 2.4days, and laparotomy were 6.6 2.3days. In conclusion, laparoscopic surgery can be used as effective and safe as laparotomy for cornual pregnancy.

흔적 자궁각 임신 1 예와 그 임상적 고찰

이상언(Sang Eon Lee),권순철(Soon Chul Kwon),김태우(Tae Woo Kim),하윤식(Yoon Sik Ha),강승철(Seung Chul Kang),원석(Seok Won),박정근(Jeung Keun Park) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.8

The pregnancy on the rudimentary uterine horn is uncommon condition, its incidence is reported nearly as 1 case per 100,000 normal pregnancy. We experienced a case of noncommunicating uterine horn pregnancy at 10-gestational week. Here we present the case with brief review of literatures.