• Journal of Chest Surgery
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• 제18권4호
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• pp.549-556
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• 1985

Since the first report on a successful method of correcting tricuspid atresia by Fontan and Baudet in 1971, several alternative surgical techniques have been described. Bjrk`s modification was performed three patients, 3, 8, and 9 years of age, in our Hanyang University Hospital. The diagnoses were tricuspid atresia type lb, tricuspid atresia type lib and d-TGA with huge VSD and valvular PS. None had previous palliative procedures. The patients were operated on with good results. The CVP after operation was 10-14 mmHg and early extubation was done. Postoperatively, none had peripheral edema or ascites. Postoperatively, all three were acyanotic and had improved physical capacity compared with their preoperative status.

• Journal of Chest Surgery
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• 제37권1호
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• pp.72-75
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• 2004

단심실성 심장기형의 교정방법으로 Fontan 수술이 행해지지만 이 수술의 위험요소를 가진 대상군에서는 고식적 수술을 시행한 후 단계적으로 Fontan 수술을 시행하는 것이 보편적이다. Fontan 수술의 시기는 고식적 수술 후 감소한 수술 위험요소와 고식적 수슬상태의 지속에 의하여 증가하는 위험 요소를 재평가한 후 결정되며, 고식술 후 비교적 조기에 시행되는 것이 보통이다. 국립의료원에서는 36세 성인 단심실증 환자에서 과거에 단방향성 Glenn 수술을 시행하고 17년 후에 완전 Fontan 수술로 전환한 증례가 있어 보고하고자 한다.

• 품질경영학회지
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• 제41권3호
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• pp.371-380
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• 2013

Purpose: This study analyzes the optimal operation scheme of childcare centers in Korea to maximize the quality of childcare service by determining the number of children and number of teachers. Methods: This study employs a mathematical programming methodology called 'nonlinear integer programming (NLIP)' to solve the optimization problems and compare the quality of childcare service of optimal solutions with those of present operation scheme. Results: It is very successful in obtaining the optimal solutions for alternative capacities and they guarantee the substantial improvement in the quality of childcare service. Conclusion: Though more variables should be adapted for defining the quality of childcare service robustly, it is possible to conclude that childcare centers should modify their operation scheme to improve the quality of childcare service.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2003년도 춘계학술대회 논문집
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• pp.203-207
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• 2003

As the upending is one of the critical steps in the installation of offshore structure, datail procedure of upending operation is studied in the paper. For larger offshore structure installation, launching method is often applied. However after launching, the upending process is to be followed. To ensure successful upending operation, datail process is analysed considering various factors affecting on the operation including reserved buoyancy, free flotation position, seabed clearance, ballast and hook load. To investigate the influence of each factor on the procedure, twelve numerical jacket models with various dimensions are simulated and studied. From the study, it is revealed that the increase of buoyance and decrease of self weight generate a large seabed clearance. The law seabed clearance during flooding creates higher hook load and height. The paper also introduces a guideline for the related structure design and construction with the effects of contribution factors in the upending operation.

• Journal of Chest Surgery
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• 제51권6호
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• pp.395-398
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• 2018

Neo-aortic insufficiency associated with root enlargement following an arterial switch operation is a serious late complication. To achieve successful surgical correction of this condition, multiple factors should be considered, including the individual patient's anatomy, the challenging nature of the redo procedure, and the patient's young age. However, limited publications have described the use of valve-sparing techniques for the treatment of neo-aortic insufficiency associated with root enlargement following an arterial switch operation. Herein, we report our recent experience of a valve-sparing aortic root procedure with ascending aorta and hemiarch replacement despite the presence of a discrepancy in leaflet size and nearby severe adhesions.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권4호
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• pp.1521-1537
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• 2021

Through information hiding technique, secret message can be hidden in pictures. Stego-image quality and hiding capacity are two important metrics for information hiding. To enhance these metrics, many schemes were proposed by scholars in recent years. Some of them are effective and successful, but there is still a room for further improvement. A high capacity information hiding scheme (PAMO, Pixel-value Adjustment with Modulus Operation Algorithm) is introduced in this paper. PAMO scheme uses pixel value adjustment with modulus operation to hide confidential data in cover-image. PAMO scheme and some referenced schemes are implemented in Python and experiments are carried out to evaluate their performance. In the experiments, PAMO scheme shows better performance than other methods do. When secret message length is less than 72000 bits, the highest hiding capacity of PAMO can reach 7 bits per pixel, at the same time the PSNR of stego-images is greater than 30 dB.

• 융합보안논문지
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• 제18권1호
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• pp.129-141
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• 2018

본 논문의 목적은 이스라엘이 이라크와 시리아에 대해 수행하였던 핵 개발시설에 대한 공습의 사례를 통해 예방공격의 효용성을 살펴보고, 북한에 대해 예방공격을 수행해야 한다면 바람직한 방안을 제시하는데 있다. 군사적 예방공격이 "단기적인 성공은 가능하나 장기적으로는 효과성이 크지 않다"는 주장에 답하기 위해 1981년에 이라크를 대상으로 수행된 Operation Opera와 2007년에 시리아에 감행된 Operation Orchard 수행과정을 살펴보고, 이러한 예방공격 이후에 각 국가의 핵 개발과정을 살펴본다. 한반도에서 효과적인 예방공격을 위해서는 현재의 국제적 압박 바탕 하에 예방공격의 정당성을 충분히 확보하고, 1회의 확실한 군사적 공격이 시설 외에도 인력 등에 대해서도 이루어져야 하며, 공격 이후에도 지속적인 핵 개발 재개여부를 모니터링 해야 한다.

• 한국광학회:학술대회논문집
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• 한국광학회 2001년도 하계학술발표회
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• pp.176-176
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• 2001

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 춘계학술대회 논문집
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• pp.999-1005
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• 2006

• Journal of Chest Surgery
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• 제27권6호
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• pp.477-480
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• 1994

A 62 year old female, who had suffered from severe pulmonary and cardiac failure with postinfarction VSD [NYHA class IV], underwent successful concomittant patch closure of ventricular septal defect and coronary artery bypass for obstructed first diagonal branch. The operation was performed electively 4 weeks after occurrence of the postinfarction VSD.