배열형 탐촉자를 이용한 증기발생기 세관 검사 적용성 검토

김인철,천근영,이영호,Kim, In Chul,Cheon, Keun Young,Lee, Young Ho 한국압력기기공학회 2009 한국압력기기공학회 논문집 Vol.5 No.1

Steam Generator(SG) tube is an important component of Nuclear Power Plant(NPP), which comprises of the pressure boundary of primary system. The integrity of SG tube has been confirmed by the eddy current test every outage. In Korea, Bobbin probe and MRPC probe have been generally used for the eddy current test. Meanwhile the usage of Array probe has gradually increased in U.S., Japan and other countries. In this study, we investigated the defect detection capability of the Array probe through its preliminary application to SG tube inspection. The Array probe has the equivalent capability in the defect detection and sizing as the conventional methods. Thus it is desirable that the Array probe is generally applied to SG tube inspection in the domestic NPPs.

거문도를 중심으로 하는 세일링요트 안전항로 개발에 관한 연구 - 전남 여수 거문도와 제주특별자치도 김녕항 루트를 중심으로 -

김인철,오현준,김동원,Kim, In-Chul,Oh, Hyeon-Jun,Kim, Dong-Won 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.2

본 연구는 여수에서 출항하여 백도와 도서문화가 살아있는 거문도를 거쳐 제주 김녕항으로 이어지는 해양관광 크루즈 세일링 요트 항로를 제안하였다. 최근 해양레저 활성화에 비례하여 안전사고도 늘어나고 있으며, 세일링 요트의 특성을 고려한 안전항로 개척은 지역별, 해역별로 조사되어야 한다. 따라서 거문도의 사례를 통해 분석해 보면 해양문화의 소개, 국제요트대회유치, 다기능항으로 개발 등이 필요하고, 특히 해당 항로의 운항패턴과 밀집도 분석 등이 추가로 도출되어야 할 것이다. 이러한 정보는 세일링 요트의 운항 안전율을 높여 지역 관광산업에 도움이 될 것이다. This study suggests a navigation route for maritime tourism cruise sail yacht that sails off from Yeosu, and passes by Baekdo and Geomundo with their live island culture, to Kimnyeonghang of the Jeju islands. Recently, there are increasing number of accidents in proportion to vitalizing marine leisure. That's why it should be examined by region and sea when developing safe sea route considering characteristics of the sailing yacht. Thus, it is needed to introduce marine culture, hold international sailing yacht race and develop multi-functional sea port according to the case of Geomundo. Also additional analysis for navigation ruote patterns and density of the fairway is required. This information will improve safe sailing level of sailing yacht that will help the local tourism industry.

유리 피판술을 포함한 다양한 방법의 하악골의 재건술

김인철,민경원,김진환,박철규,이윤호,김석화,권성택,김지혁,이민구,Kim, In Chul,Minn, Kyoung Won,Kim, Chin Whan,Park, Chul Gyoo,Lee, Yoonho,Kim, Suk Wha,Kwon, Sung Tack,Kim, Ji Hyuk,Lee, Min Goo 대한미세수술학회 2000 Archives of reconstructive microsurgery Vol.9 No.1

Reconstruction of the composite mandibular defect resulting from ablative resection of tumor involved jaw has been challenging task to the plastic surgeon. A wide variety of different techniques were used with limited success until the advent of microsurgery. The high success rate of microsurgical procedures has allowed for significant improvement in both functional and aesthetic results. A variety of free flap donor sites have been used successfully for mandibular reconstruction. Between April of 1991 and August of 1998, 20 mandibular reconstructions were performed for oncologic defects. 4 patients underwent mandibular reconstruction with pectoralis major flap, 3 patients with free nonvascularized bone graft, 1 patient with metal plate. 12 patients underwent microvascular mandibular reconstruction(8: fibula, 4: ilium). The type of free flap was determined by the requirements of the defect. Satisfactory aesthetic and functional results were achieved in all cases without significant complications. So microvascular mandibular reconstruction should be considered as primary choice in all mandibular defect without hesitation.

증기발생기 전열관 와전류검사용 국내 개발 보빈탐촉자 적용성 분석

김인철,주경문,문용식,Kim, In-Chul,Joo, Kyung-Mun,Moon, Yong-Sig 한국압력기기공학회 2011 한국압력기기공학회 논문집 Vol.7 No.4

Steam Generator(SG) tube is an important component of Nuclear Power Plant(NPP), which is the pressure boundary between the primary and secondary systems. The integrity of SG tube has been confirmed by the eddy current test every outage. The eddy current technique adopting bobbin probe is currently the primary technique for the steam generator tubing integrity assesment. The bobbin probe is one of the essential components which consist of the whole ECT examination system and provides us a decisive data for the evaluation of tube integrity. Until now, all of the ECT bobbin probes in Korea which is necessary to carry out inspection are imported from overseas. However, KHNP has recently developed the bobbin probe design technology and transferred it to domestic manufacturers to fabricate the probes. This study has been conducted to establish technical requirements applicable to the steam generator tube inspection using the bobbin probes fabricated by the domestic manufactures. The results have been compared with the results obtained by using foreign probe to identify the availability to the steam generator tube inspection. As a result, it is confirmed that the domestic bobbin probe is generally applicable to SG tube inspection in the NPPs.

교합변위(咬合變位)에 따른 한국인(韓國人)의 교합력(咬合力)에 관(關)한 연구(硏究)

김인철,Kim, In-Chul 대한치과보철학회 1985 대한치과보철학회지 Vol.23 No.1

소프트웨어 로봇 연구용 테스트베드

김인철,Kim In-Chul 대한전자공학회 2006 전자공학회지 Vol.33 No.3

소프트웨어 로봇들은 시뮬레이트된 센서와 실행기들을 가지고 가상 환경 안에서 자율적으로 동작하는 지능형 가상 에이전트로 볼 수 있다. 지능형 가상 에이전트 연구용 테스트베드들은 에이전트들의 성능 평가를 위해 표준화된 작업들을 구현할 수 있고, 환경이나 실험 에이전트들을 제어할 수 있는 도구들이다. 본 논문에서는 RoboCup 축구 시뮬레이션시스템, Gamebots 시스템, USARSim 시스템 등과 같은 지능형 가상 에이전트와 멀티 에이전트시스템 연구를 위한 대표적인 테스트베드들을 간략히 소개한다.

원전 증기발생기 와전류검사 시스템 현장적용 연구

문균영,이태훈,김인철,Moon, Gyoon-Young,Lee, Tae-Hun,Kim, In-Chul 한국압력기기공학회 2015 한국압력기기공학회 논문집 Vol.11 No.2

Steam generator is one of the most important component of nuclear power plant, and it's integrity and reliability are to be assured to high level by pre-service inspection and in-service inspection. To improve the reliability of steam generator heat exchanger tubes and to secure the management of nuclear power plant safely, KHNP CRI recently has developed eddy current testing system for steam generator. KHNP CRI have performed a series of experimental verification and field application to confirm the performance of the developed ECT system in accordance with ASME Code requirements. The ECT system consists of a remote data acquisition unit, an ECT signal acquisition and analysis software, a water chamber robot controller and a probe push-puller. In this paper, we will details of the developed ECT system and the software and their experimental performance. And also we will report the field applying performance and the issues for further steps.

한국의 통화대체 함수에 대한 통화론적 접근

김인철 ( In Chul Kim ),안경애 ( Kyoung Ae An ) 국제지역학회 2005 국제지역연구 Vol.9 No.2

통화대체는 거주자가 국내화폐와 외국화폐 중 한 개를 선택하는 것을 가리키는데 통화대체 이론이 처음 나온 것은 1970년대 중반이었다. 화폐수요함수의 불안정성을 체계적으로 설명하는 이론으로서 통화대체 이론은 그 당시 세계적 추세인 자본자유화에 편승하여 거주자가 국내화폐와 함께 외국화폐를 보유하게 된 사실을 잘 반영하는 이론이었다. 통화대체 현상이 주는 한 가지 큰 정책적 시사점은 화폐수요의 불안정 때문에 화폐공급정책의 효과가 크게 줄어든다는 것이었다. 본 연구에서는 한국의 통화대체 함수를 추정하고자 하였다. 화폐시장 균형조건을 이용하여 통화대체에 관한 이론방정식을 도출하였다. 분석기간은 1990년 3월부터 2004년 9월까지의 월별자료를 사용하였다. 그리고 자료수의 부족과 짧은 분석기간으로 인해 발생하는 문제를 고려하기 위하여 부분조정모형 (partial adjustment model)을 이용하였다. 분석결과에 의하면 시차 종속변수를 포함한 모든 외생변수들이 한국의 통화대체 현상을 잘 설명하는 것으로 나타났다. 그리고 통화대체의 대용변수로서 거주자외화예금과 외환보유고를 사용하였으며 또한 국가의 경제개방도를 나타내는 변수로서 對 GDP 수입비율을 이용하였다. 통화대체 변수로서는 실질GDP 변수보다 경제개방도가 통화대체를 더 잘 설명하고는 것으로 분석되었다. 본 연구의 정책적 함의로서 지적할 수 있는 점은 한국경제가 보다 개방화됨에 따라 통화대체 현상은 보다 더 빈번하게 발생할 것이며 이때 통화정책 당국이 다른 정책수단을 쓰지 않으면 통화정책의 효력은 감소할 것이다. Currency substitution refers to the resident`s substitution between domestic and foreign currency. It was in the mid 1970s that the currency substitution theory was first developed. It was to explain the instability in the money demand function, which might cause the ineffectiveness of monetary policy. The discussion of currency substitution has revised in the late 1990s. Their issue of currency substitution was analyzed in the context of Latin American countries. In their case, it was 100% currency substitution, put differently, dollarization. Dollarization was proposed to prevent a currency crisis in those countries. In the case of Korea, however, currency substitution can be examined as the country is concerned about lessened effectiveness of monetary policy rather than about prevention of currency crisis. In this study we tried to estimate Korea`s currency substitution function. We derived a theoretical equation for a country`s currency substitution by using the conditions of money market equilibrium. We used the monthly data taking the sample period of March 1990 through September 2004. To get around the problems related to the shortage of data and short-term period, we used a partial adjustment model. According to our estimation results, all exogenous variables including the lagged dependent variable well explained Korea`s currency substitution phenomenon. We used the resident`s foreign currency deposits and the country`s foreign reserves as the foreign currency variable. We also used the import-GDP ratio as the country`s openness variable. Interestingly, the openness variable explained currency substitution much better than the real GDP variable. The policy implication of this study is obvious. As Korea is getting more open, currency substitution phenomenon will be more prevailing. Then the country`s monetary policy will be less effective unless the government finds other instruments.

일시적 복제 도입의 문제점

김인철 ( In Chul Kim ) 한남대학교 과학기술법연구소 2012 과학기술법연구 Vol.18 No.3

한·미 FTA의 이행으로 대한민국 저작권법은 일시적 저장도 저작권을 침해할 수 있다는 제도를 도입하게 되었다. 이 제도는 미국의 MAI v. Peak 사건 이후 많은 나라에서 도입되었지만 미국과 호주를 제외하면 판례가 거의 존재하지 않는 상황에서 도입되었기 때문에 어떻게 적용될 지에 대해서 예견하기가 매우 어렵다. 이와 더불어 컴퓨터프로그램 이용자의 의사와 관계없이 복제되도록 만들어진 폰노이만 컴퓨터 구조에서 어떻게 민사상의 고의나 과실 또는 형사상의 고의를 인정할 수 있는지 의심을 가지게 한다. 이와 더불어 침해의제행위와 일시적 복제에 대한 조문의 충돌로 인하여 법정책적으로 모순이 있기 때문에 저작권위원회나 문화체육관광부의 가이드라인이 나와야 할 것으로 생각된다. 이러한 주장을 설명하기 위하여 미국과 호주의 판례를 언급하고, 한국저작권법에 적용되기 어려운 점을 본 논문에서 소개하고자 한다. To implement Kor-US FTA, Korean Copyright Act adopted new system that temporary reproduction in RAM may be copyright infringement. This system has been adopted in many countries since MAI v. Peak decided by 9th Circuit of United States, but it is very difficult to find cases about temporary reproduction except U.S. or Australian cases and, in U.S., some courts did not recognize the copyright infringement when RAM reproduction was made without the volition of users and in Australia, some courts did not accept copyright infringement when copyrighted work was reproduced in RAM. Because Korean Copyright Act adopted the temporary reproduction may be regulated by copyright owner, the provision should be enforced. However, the adoption may be not be reconciled with the legal system which requires intention or negligence in Tort and requires intention in criminal case. This paper argues that because most temporary reproduction under Copyright Act cannot be regulated in most cases, Korean Copyright Council or The Ministry of Culture, Sports and Tourism should declare the guideline before courts make a decision about temporary reproduction.

간장 ( 肝臟 ) 및 담도 ( 膽道 ) : 팽대부 주위암 환자에서 침습적인 진단방법에 대한 합병증

김인철(In Chul Kim),김동구(Dong Goo Kim) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.4

N/A There are several ways of clinical application in diagnosis of periampullary cancer, namely invasive and non-invasive technique. Each method has its own advantage in accuracy but also caused seldomly unexpected life-threatening complications. Authors recently experienced serious complications which made surgeon change operative procedures from resection of tumor ta palliative bypass surgery by the development of complication after invaslve diagnostic technique such as ERCP and PTC respectively. Authors analyzed diagnostic procedures and its complications in 114 cases of operative patients for periampullary cancer experienced at the Surgical Department of Catholic University Medical College, Seoul, Korea. Age and sex distribution were showed that the peak incidence was on decade of 60 and 50 of age in both male and female patients. Pancreas cancer was most cornmon lesion as 68% of all cases. Invasive techniques of diagnostic procedmes both ERCP and PTC were more informative than non-invasive procedures but combined methods of sonography and computed tomography were also valuable and provided high aceuracy (85.2%) in diagnosis of periampullary cancer in our experience. Main complications after invasive techniques of diagnostic procedures were fever, bleeding, bile leakage and elevated enzyme. Especially in 4 out of 65 cases, the definite procedures were changed to palliative operation such as bypass or external decompression of bile flow due to serious inflammatory changes around the upper abdominal organs developed by invasive techniques. The predictive risk factors for development of complications of the invasive diagnastic procedures were prediagnostic statue of high body temperature, anemia, leukocytosis, impairment of coagulobilities, hypaalbumfnemia and jaundice. Hyperglycemia was not signifiantly caused to increase development of complicttons. Authore would like to recommand that if patient showed highly suggestive finding of resectable or localized malignancy by non-invasive diagnostic procedures such as ultrasonography, computed tomography ar combined procedure, additional invasive techniques such as ERCP or PTC should be abandaned end go ahead operation in predicted high risk patients of complications.