베트남 안케지역의 지질과 금-은 광화작용

이길수,정동화,김성식,김준호,유인국,김태형 대한지질학회 1994 대한지질학회 학술대회 Vol.1994 No.

소음성난청 산재보상 적용사례

이길수 한국산업간호협회 1997 한국산업간호협회지 Vol.4 No.4

중학교 인성교육 프로그램의 효과 메타분석

이길수,조덕주 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.24

Objectives The purpose of this study is to identify and analyze the effect size by systematically analyzing studies that have verified the effects of character education programs in middle school. Methods To this end, papers were searched and selected step by step according to the PICOS selection criteria from February to April 2023. The years were from 2016 to 2022, which were published after previous research, and a final meta-analysis was conducted on 22 dissertations and journal papers published in Korea that met the criteria, with an effect size of 129. The research tools used for descriptive statistics were Excel, R 4.3.0, and R studio. Results The overall effect size of the middle school personality education program was medium-sized and had a significant educational effect. When classified according to type, the non-subject education program showed a relatively higher effect size than the subject education program, but there was no significant difference. By moderating variable, it was analyzed that the effect size was relatively high when the number of people in the group was small, with 1 to 10 sessions for each session, 40 to 60 minutes for each hour, and fewer people in the group. Conclusions The significance of this study is that it conducted a meta-analysis of studies that verified the effect of a character education program targeting middle school students experiencing rapid change on character development in middle school students. In addition, at a time when the Character Education Promotion Act was enacted and various programs were being developed according to the comprehensive promotion plan, the difference from existing studies was that the effects were compared and analyzed by distinguishing whether the type of character education program was a non-curricular education program or a subject education program. There is. In addition, it is meaningful in that it provided basic information for the development of middle school character education programs based on the results of the analysis of each control variable. Based on the research results, directions and limitations for future research were presented.

도관으로서의 하지심부정맥

이길수,오삼세 대한혈관외과학회 2012 Vascular Specialist International Vol.28 No.3

Infected vascular lesion, including aortic graft infection, is one of the most challenging fields in vascular surgery. The primary treatment objectives are to remove the infected graft material and to re-establish vascular continuity with an extra-anatomic bypass or in situ graft replacement. Despite significant progress in perioperative care and antimicrobial therapy, mortality and morbidity remain high. The great saphenous veins are gaining wide popularity as acceptable native vascular grafts, but in terms of flow capacity, their small caliber may be unsuitable for immediate replacement of arterial flow. Superficial femoral popliteal vein grafts are excellent conduits for infected aortic, peripheral arterial and central venous lesion, in terms of feasible harvesting, resistance to infection, serving immediate high postoperative flow and long-term durability. Surgery using the superficial femoral vein (SFV) graft is neither time-consuming nor dangerous. A delicate preoperative and intraoperative surgical plan is mandatory, and future studies regarding the long-term patency, appropriate clinical indication and safety issue of the SFV graft in peripheral vessel reconstruction are warranted.

코스닥시장 우회상장대상 기업의 우회상장 단기효과 분석

이길수,이기환 한국자료분석학회 2008 Journal of the Korean Data Analysis Society Vol.10 No.5

The purpose of this paper is to research how the corporate value of the M&A target company in the KOSDAQ changes before and at the time of their Official Public Announcement of being merged into unlisted company with an intention of the back-door listing. Samples of research - total 48 companies at KOSDAQ have been finally selected from the 61 back-door listed companies which went public during the time span from June 27, 2006 to June 30, 2008 by utilizing the DART system of "Korea Financial Supervisory Service" (KFSS). 13 companies out of 61 were discarded due to difficulties in accessing to the companies' data and information. We found that the target listed companies for the back-door listing had shown the continuously meaningful accumulated surplus returns of +10.96% during the time of 4 days starting from -3 days before t day(1 day before Public Announcement) to the day of Official Public Announcement. Noticeably, during the time of 30 days before t day to the day of Official Public Announcement, we'd found that the target companies in the KOSDAQ realized the accumulated surplus returns of +22.93%. Even considering the possibility of licking-out of information before its official announcement, we'd realized that the back-door listing was playing a positive role over the market in terms of its cost-saving aspects and its time-saving effects. As a conclusion, we'd found that the companies pitching for IPO could pursuit the corporation's value maximized through the utilization of back-door listing scheme by M&A procedure with already listed companies, which have been proved by the fact of comparatively high surplus returns realized by the listed target company during the time of certain period before their official public announcement. 본 연구의 목적은 코스닥시장에 상장한 우회상장대상 상장기업과 우회상장제의 비상장기업이 합병할 때 우회상장대상 상장기업의 가치가 M&A 공시 시점에서 어떻게 변화하는지 사건연구를 통하여 분석하는데 두었다. 연구표본은 금융감독원 전자공시시스템(DART)을 통해 2006년 6월 27일부터 2008년 6월 30일까지 2년간 합병으로 우회상장(backdoor listing)한 총 기업 61개사 중 자료를 구입할 수 있는 48개사를 표본으로 분석하였다. 연구결과 우회상장대상 상장기업은 공시 직전일 t시점 (-)3일부터 공시일 당일까지 4일 동안 지속적으로 유의한 (+)10.96%의 누적초과수익률을 보이고 있음을 발견하였다. 공시일 전 (-)30일부터 공시일 당일까지 우회상장대상 상장기업의 우회상장 전 누적초과수익률은 22.93%를 실현하였다. 공시일 3일 전 유의한 초과수익률에 대하여 우회상장 합병기업에 대한 정보가 사전에 유출되었을 가능성, 코스닥시장에서 신규상장에 따르는 비용부담이나 상장 예비심사 과정 없이 상장효과를 누리는 가치의 평가 등으로 코스닥시장이 긍정적으로 반응한다고 판단할 수 있다. 우회상장 공시 전 일정기간 동안 비교적 높은 수준의 초과수익률을 달성하고 있음을 볼 때 우회상장제의 비상장기업이 우회상장대상 상장기업을 통하여 가치극대화를 추구한다고 판단된다.

급성 하행대동맥 박리증에서 스텐트-그라프트 삽입 후 새로이 발생한 원위부 대동맥류에 대한 인조혈관 대치술 치험 1예

이길수,방정희,조광조,성시찬,우종수 대한흉부외과학회 2003 Journal of Chest Surgery (J Chest Surg) Vol.36 No.6

합병증이 있거나 수술의 적응증이 되는 대동맥 질환은 사망률과 이환율이 높지만 수술기법이 난해하고 적지 않은 수술부작용이 발생하는 바, 최근 들어 이들 질환을 혈관내 스텐트 삽입술로 치료하려는 시도가 늘어가고 있는 추세인 반면에 적합한 적응증 및 시술 후 발생하는 합병증에 대한 논의는 아직 초기 단계에 있다. 저자들은 하행 대동맥 박리증으로 혈관내 스텐트 삽입술을 시행한 후, 원위부 흉복부 대동맥류가 커져 관류부전의 징후를 보인 환자를 수술적인 방법으로 교정하여 성공하였기에 이를 문헌 고찰과 더불어 보고하는 바이다.

자동제어설비

이길수,Lee, Gil-Su 한국설비기술협회 1986 설비 : 공조ㆍ냉동ㆍ위생 Vol.3 No.11

성인 심혈관 수술 후 시행한 체외순환보조의 조기 임상결과

이길수,나찬영,오삼세,김재현,류세민,박성민,조성준 대한흉부외과학회 2009 Journal of Chest Surgery (J Chest Surg) Vol.42 No.4

Background: We analyzed the clinical results and the factors for survival of patients who underwent extracorporeal life support system after adult cardiovascular surgery. Material and Method: We retrospectively reviewed the medical record of 44 patients (1.6% of the total adult cardiovascular surgical cases) who underwent the use of a ventricular assisted device or extracorporeal membrane oxygenation from January 2002 to August 2008. There were 32 (72.7%) males and their mean age was 61.7±14.9 (range: 20∼73) years old. The mean duration of extracorporeal life support system was 5.3±3.0 (range: 1∼12) days. Result: Of these 44 patients, 24 (54.5%) patients were successfully weaned from the extracorporeal device. Eighteen (40.9%) survivors were able to be discharged from the hospital. Complications were noted in 38 patients (86.4%). An emergency operation, no usage of a concomitant intraaortic balloon pump and major complications during use of the extracorporeal life support system such as bleeding, flow instability and renal failure were identified as significant risk factors for poor survival on univariated analysis. Owing to educational support and a continuous renal replacement therapy system, the clinical outcomes of these patients have improved since 2006. On multivariated analysis, renal failure and bleeding during extracorporeal life support were significant risk factors for poor survival. Conclusion: Although using extracorporeal life support systems after adult cardiovascular surgery revealed acceptable clinical results, determining the optimal treatment strategy and further well designed larger studies are needed to improve the survival rate of patients who undergo extracorporeal life support after adult cardiovascular surgery. 배경: 성인 심혈관 수술 이후 체외순환보조를 시행해야 했던 환자들의 조기 임상 성적과 생존에 영향을 미치는 인자 등을 분석하기 위하여 연구를 시행하였다. 대상 및 방법: 2002년 1월 1일부터 2008년 8월 31일 까지 성인 심혈관 수술을 시행 받은 환자 2,721명 중 심실보조장치(Ventricular Assist Device) 혹은 체외막형산화기(Extracorporeal membrane oxygenation)를 삽입한 44명(전체 성인심혈관 수술 환자의 1.6%)을 대상으로 수술 및 의무기록지를 후향적으로 분석하였다. 평균 연령은 61.7±14.9세(범위, 20∼73세)였고 남자가 32명(72.7%)을 차지하였다 평균 체외순환보조기간은 5.3±3.0일(범위, 1∼12일)이었다. 결과: 전체 44명의 환자 가운데 체외 순환 보조 장치를 이탈 할 수 있었던 환자는 24명(장치 이탈률 54.5%), 생존퇴원은 18명(생존율 40.9%)이었다. 합병증은 38명(86.4%)에서 발생하였다. 단변량 분석에서, 응급수술, 삽관기간중 출혈, 신부전, 혈류 불안정(flow instability), 대동맥내 풍선장치를 동시에 사용하지 않은 경우 등이 사망에 영향을 미치는 인자로 조사되었고, 2006년 이후 성적이 향상되고 있음을 알 수 있었다. 다변량 분석에서 체외순환중 신부전의 발생, 출혈이 사망에 유의한 인자로 파악되었다. 결론: 성인 심혈관 수술 이후 체외순환보조는 만족할만한 임상결과를 보이고 있어 적극적인 활용이 요구되지만 보다 나은 생존율을 위한 전반적인 치료전략의 개선과 광범위한 전향적인 연구가 필요하다.

자동제어장치의 보수관리

이길수,Lee, Gil-Su 한국설비기술협회 1987 설비 : 공조ㆍ냉동ㆍ위생 Vol.4 No.1

Implementation of Electric Power Assisted Steering System via Hardware-In-Loop-Simulation System

이길수,박형규,김명국,박중현,이만형 한국항해항만학회 2011 한국항해항만학회지 Vol.35 No.4

With the development of mechatronics technology in the transporter industry, the electric power assisted steering (EPAS) system has many advantages compared to the hydraulic system. Many manufacturers are developing and applying EPAS systems to improve the performance of the transporter. Using the HILS system developed in the paper, an adaptable EPAS system was developed for real transporter. It was installed in a real , KIA Rio, and tested. Results indicated outstanding performance. Therefore, the developed EPAS can be applied via HILS system.