當歸水鍼이 鎭痛效果에 미치는 影響에 關한 硏究

朴快煥,姜成吉 慶熙大學校韓醫科大學韓醫學硏究所 1984 慶熙韓醫大論文集 Vol.7 No.-

24주간 추적하는 임상 연구에서 한국인 남자 알코올 의존 환자의 비재발률

강철중,김성곤,남궁기,조동환,이병욱,최인근,최용성,박성봉,제영묘,김현경,김성연 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.1

Objetives : In order to provide useful data tbr the further clinical studies with Korean alcohol-dependent patients, enrollment and non-relapse rates were investigated while alcohol-dependent patients wcre followed up for 24 weeks. Methods : The subjects of this study were alcohol-dependent male patients who, for the first time, visited a hospital among 3 groups of hospitals, University Hospital, General Hospital or Mental Hospital, or those who needed to be followed up after discharge from those hospitals. After assigning 12 subjects to each hospital, we investigated enrollment and non-relapse rates while cognitive-behavioral therapy and pharmacotherapy were provided. Results : 1) Forty-eight patients were enrolled and the rate of enrollment was 36.4%. The enrollment rate in the University Hospital group was 52.1%, in the General Hospital group 50.0%. and in the Mental Hospital group 10.4%. 2) In 48 patients, non-relapse rate was 27.1% at 12 week and 18.8% at 24 weeks after starting follow-up. It was 24.4% and 20.0% at 12 and 24 weeks, repectively, in the University Hospital group while the General Hospital group showed 33.3% and 16.7%, respectively, and the Mental Hospital Group showed 20.0% at both 12 and 24 weeks. Conclusion : These results provide important data for further clinical studies of Korean alcohol-dependent patients.

[논문]용접부의 피로 파손모드 평가에 대한 구조응력기법의 적용에 관한 연구

강성원,김명현,김정환 釜山大學校生産技術硏究所 2006 生産技術硏究所論文集 Vol.65 No.-

반복 하중을 받게 되는 하중전달형의 필릿 용접이음에서는 용접 토우부 뿐만 아니라 용입 부족부 선단에서도 응력집중을 일으키고 피로균열이 발생/ 전파하는 경우가 있다. 특히/ 용접 루트부에서 발생한 균열은 육안관찰이 불가능하고 초음파 탐상등에 의한 비파괴 검사에 의해서도 검출이 곤란한 경우가 많다. 이것은 중대한 손상을 일으키기 까지 방치되는 경우가 많기 때문에 용접 루트부에서 발생하는 균열에 대한 연구는 현재 활발히 진행되고 있다. 본 연구에서는 최근 유한요소 해석시 요소의 크기에 둔감하다고 알려진 구조응력 기법을 이용하여 용입 부족부를 가지는 하중전달형 필릿 용접부의 피로 파손모드를 평가하였다. 용접부 다리길이의 변화에 따른 사례 연구를 통하여 용접 루트부의 파손을 피할 수 있는 용접부 시공기준에 관한 연구를 수행하였으며 이에 대한 구조응력 기법의 적용 가능성을 검토하였다.

LPF와 반복삽입을 이용한 효율적인 오디오 워터마크 추출

강혜원,이우선,정성환 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

We propose a method to decrease greatly the of original signal and improve efficiency in extraction process by modifying the existent audio watermarking extraction process. In the extraction process, we improve the efficiency of watermark extraction through repeated insertion of watermark and usage of a simple low frequency filter to remove a signal similar to an original signal as a preprocessing. As the result of experiment using some actuality audio data, we get watermark detection rate improvement of about 79%.

관상동맥질환 환자에서 스텐트 시술 후 재협착에 관한 연구

강진환,권영주,박상호,한대희,이상철,김명구,변정득,최병조,심규혁,온영근,현민수,김성구 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background and aims : In the coronary artery disease, a rate of restenosis was much decreased by placement of coronary stent than when percutaneous transluminal coronary angioplasty has been applied, but there are still important clinical problems of restenosis. There has been many progressive studies about various factors contributed to this restenosis. So, we studied a relation between restenosis after placement of coronary stent in the coronary artery disease and many clinical factors, characteristics of stenotic lesion and procedural factors, and also assessed the restenosis rate of various coronary stents. Methods : Total 58 lesions(46 cases of patients ; man 30, woman 16) were evaluated, which has been performed a follow-up coronary angiography after 6 months (mean 188 days) since coronary stent had been placed. Various stents were implanted and assessed a relation between restenosis and many factors. Results : Of 58 lesions were target stenotic studies, there were 22 of restenotic lesions(37.9%), and the restenosis rate wes statistically significant difference in the relation with diabetes mellitus(p<0.05), group of acute myocardial infarction(p<0.05) among clinical diagnosis of ischemic heart disease(stable angina, unstable angina and acute myocardial infarction) in clinical factors and with high dilation pressure of stent(p<0.05) in procedural factors. When the rate of restenosis was evaluated among implanted stents, it was lowest in the Multilink^(®) stent and highest in the Nir Royal^(®) stent(60%). Conclusion : In this study of restenosis and various factors after placement of stents in the coronary artety disease, factors such as diabetes mellitus, group of acute myocardial infarction and a dilation pressure of stent were significant related with restenosis and the restenosis rate of Multilink^(®) stent was lowest and the highest restenosis rate was of Nir Royal^(®) stent.

상악 골절단 및 급속구개확장(SARME)을 이용한 술전 치성보상의 해소와 악교정 치험 2례 : REPORT OF 2 CASES

강상원,김명래,김기환,김한석,김채두 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4

This is to review the surgically assisted rapid maxillary expansion followed by orthodontic treatment for malocclusion with maxillary narrow-arch. Two patients who presented with narrow-arch maloccluson and transverse maxillary deficiency underwent a Lefort I osteotomy extending to the zygomatico-maxillary but-trees and splitting of the midpalates. Orthopedic expansion was initiated with one complete rotation 0.8㎜ of the expansion screw on the day, and followed by two quarter-turn 0.4㎜ each day thereafter untill the arch expanded to preplanned level. Changes of the mid-incisal gap space. intermolar width. incisal inclination, TMJ symptoms and reapse tendency were examined periodically. After the surgico-orthodontic leveling and alignment. pre-planned orthognathic surgeries (maxillary & mandibular osteotomies) were rendered to correct the maxillofacial deformites. Results:Intermolar width (IMW) was increased to 13㎜ within 20 days and the gap between to cen-tral incisors was declined to5-7^。. There were neither complaints nor signs of TMJ disorders during treatment. The amount of relapse was less than 0.5㎜ in a year. Therefore, the surgically assisted rapid palatal expansion(SARME) can be a pre-orthodontic option to gain the interdental space in narrow-arch malocclusion with crowding and to reduce the labial inclination of upper incisors without extraction of premolars.

풍력 발전 시스템의 피치제어

강상수,강승균,임종환,허종철 濟州大學校工科大學産業技術硏究所 1999 尖端技術硏究所論文集 Vol.10 No.1

Wind turbine system converts wind energy into electric energy. Since the velocity of wind is random in nature, control of the angular velocity of the blade is necessary in order to generate high quality electric power. The control of the blade can be divided into the stall regulation type and the pitch control type. The stall regulation type which utilizes an aerodynamic stall is simple and cheap, but it suffers from fluctuation of the resulting power. On the contrary, pitch control type is based on the fact that the torque of the blade can be changed by varying the pitch angle of the blade. It is mechanically and mathematically complicated, but the control performance is better than that of the stall regulation type. This paper derives a mathematical modeling of the wind turbine system, and suggests a pitch control algorithm. The validity of the algorithm is demonstrated with the results produced through sets of experiments.

Vision을 이용한 고정밀도 Solder Cream 인쇄기 개발에 관한 연구

강상철,허봉식,김민환 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-

The solder cream printer requires the high speed and high precision operation. In this paper, we developed a high precision solder cream printer using vision in PC-based developing environment. The most important part of this machine is the vision part that recognizes the fiducial mark of a PCB and that of a matal mask and repositions the PCB to match the former to the latter. In this paper, a multi-resolutional and hierarchial correlation method named HCR is explained as a high-speed matching method and a repositioning method and a repositioning data learning method are suggested and explained. Through experiments, it is verified that this machine has a 19 μm error tolerance in 5.578 seconds. Solder cream 인쇄기는 빠른 속도와 높은 정밀도를 요구한다. 본 연구에서는 PC환경을 기반으로 하여 vision을 이용하는 solder cream 인쇄기를 개발하였다. 이 장비의 가장 중요한 부분은 PCB의 기준마크와 metal mask의 기준마크를 인식하여 PCB를 metal mask와 정확히 일치하도록 위치보정하는 부분이다. 본 논문에서는 고속의 정합방법으로서 다해상도 영상표현법에 의한 단계적 정합방법인 HCR(hierarchial correlation) 방법을 설명하고, 또한 PCB의 패턴과 metal mask의 패턴이 일치되도록 위치보정하는 방법 및 이를 위한 데이터를 학습에 의해 구하는 방법을 제시하고 설명한다. 본 연구에서 개발된 시스템은 약 5.578초의 처리시간에 19μm이내의 허용오차를 갖는 것을 실험 및 분석을 통해 검증하였다.

특허 및 기술정보의 연계 검색에 관한 연구

강윤희,궁상환 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

최근 정보통신을 비롯한 다양한 분야에서 새로운 기술과 아이디어를 이용한 기술개발이 활발하게 이루어짐에 따라 창의적 연구결과에 따른 특허 출원도 급격히 증가하고 있다.본 논문에서는 사용자의 특허검색 과정에서 특허와 관련된 기술문서를 동시에 검색이 용이하도록 지원하는 방식을 개발하는 것을 목적으로 한다.특허 및 기술정보 연계 시스템은 신규 특허 문서에 대한 분류를 위해 주제별 주요용어를 추출하고 특허 문서와 유사한 기술 문서를 코사인 유사도 기법을 사용하여 유사도에 따라 기술 문서를 사용자에게 제공할 수 있도록 설계하였다.

고조파 분석을 이용한 고저항 지락사고 검출에 관한 연구

강승호,조성빈,김철환 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1

High Impedance Fault(HIF) is defined as fault that general overcurrent relay can not detect or interrupt. When HIF occurs in transmission line, arc with energized high voltage conductor is happened and results in fire hazard, equipment damage or personal threat. This paper proposed the HIF fault detection method using harmonic analysis and showed the arc model which can he implemented within Electromagnetic Transients Program(EMTP). Harmonic analysis is efficient and useful for the detection of HIF in power system because it shows good characteristics about odd harmonic components of current when HIF occurs.