• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2014.06a
• /
• pp.65-67
• /
• 2014

부산항대교는 부산 남구 감만동과 영도구 청학동을 잇는 총 길이 3,368m 규모의 국내 최장 강합성 사장교로 5월 22일 개통하였다. 특히 야간에는 경관조명 등 '빛의 연주'라는 주제로 화려한 볼거리를 구성하여 '부산 해상순환도로'를 활용한 새로운 관광명소로 운영할 계획이다. 그러나 부산북항 통항 선박의 경우 화려한 조명 및 부산항 배경광 등으로 인해 선박통항 시 위험성이 높아질 것으로 우려되며, 이번 연구를 통하여 부산항대교 경관조명에 따른 부산북항 도등 기능검토 및 부산북항 선박통항안전성에 관한 검토를 하고자 한다. 실선박을 이용한 현장조사를 통하여 현재 설계중인 부산항 도등의 기능을 재검토하고, 부산항대교 경관조명 및 부산북항 배경광에 따른 선박 통항 안전성을 검토한다.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.1040-1041
• /
• 2008

서울지하철 1호선이 1974년 개통이후 현재의 이르고 있다. 양적인 팽창뿐만 아니라 기술적 및 서비스 개선 등 많은 발전을 이룩하였다. 다만 전 수명주기측면에서 한 사이클을 활용하고 개량 및 개선의 필요성이 제기된다. 이때 고려하여야 할 사항으로는 운영, 기술적 사항, 경제성, 비용편익측면 등에서 다각도로 검토되어야 한다. 각 하부시스템에 따라서는 각기 하부 시스템간 인터페이스 되어야 할 부분이 우선적으로 검토되어야 하겠지만 그 중에서 가장 어려운 점이 차량과 신호시스템으로 판단된다. 시스템 기능구현측면에서부터 시스템 운영에 미치는 파급효과 크기 때문에 어려움이 있다. 시스템폐기에 따른 도입, 개선 및 개량 등에 있어서 국내 기준측면에서 살펴보면 차량의 경우 기준은 명확하게 정의되어 있으나 신호시스템의 경우는 그런 기준이 수립되어 있지 못하다. 따라서 본 논문에서는 신호시스템의 개량에 대하여 전반적으로 검토하여 향후에 정의되어야 할 내용이나 검토하여야할 사항에 대하여 논하였다.

• The Safety technology
• /
• no.203
• /
• pp.21-23
• /
• 2014

지난 1984년 개통된 88올림픽 고속도로는 '전라남도 담양군'과 '대구시 달성군'을 연결하는 고속도로로 동서교류를 확대하는 큰 역할을 하고 있다. 하지만 현재는 국내에서 유일한 왕복 2차선 고속도로인 것은 물론 중앙분리대가 없는 유일한 고속도로로 유명하다. 즉 늘어나는 교통량을 감당하지 못하고, 안전성에도 문제가 있는 것이다. 때문에 현재 88올림픽 고속도로가 포함된 제12호선 고속국도에서는 왕복 4차선으로의 확장공사가 한창 진행 중이다. 오늘의 주인공인 (주)포스코건설은 고속국도 제12호선의 담양~성산 간 확장공사 제3공구 현장을 책임지고 있다. 확장공사가 이뤄지는 목적이 고속도로 운전자들의 안전성 제고에 있는 만큼 이곳에서는 그 취지가 무색해지지 않게 근로자들의 안전을 최우선 가치로 여기고 있다. 이곳 현장에서 어떤 안전활동이 전개되고 있는 지 찾아가 봤다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2024.01a
• /
• pp.153-155
• /
• 2024

본 논문은 진접선 개통 이후 급증하는 서울 지하철 4호선의 혼잡 문제와 현재 진행 중인 장애인 차별 반대 시위를 다룬다. 네이버의 지도 API를 활용해 위도와 경도 데이터를 추출하고 지하철 노선별 장애인 승객 수와 최대 지연시간을 시각화한다. 2호선과 4호선의 혼잡도가 표시되어 문제의 심각성을 알 수 있다. 평균 출퇴근 시간 탑승 및 하차 수치를 분석하여 4호선 편의시설 개선, 2·4호선 열차 운행 횟수 늘리기, 환승역 운영 최적화 등 전략적 권장 사항을 제시한다. 제안된 대책은 서울시 지하철 시스템의 접근성 향상, 혼잡완화, 전반적인 효율성 제고를 통해 보다 폭넓은 교통시설 개선과 승객 편의 증진에 기여하는 것을 목표로 하고 있다.

• Journal of Chest Surgery
• /
• v.35 no.8
• /
• pp.573-579
• /
• 2002

Background: In this study, the role and the surgical outcome of the modified Blalock-Taussig shunt in the treatment of the infants with cyanotic complex congenital heart diseases were investigated. Material and Method: Over the last 12 years, 105 modified BT shunts were performed in 100 infants. Postoperative course, shunt patency rate, complications, mortality and its risk factors were reviewed restrospectively. Result: The mean age at operation was 43.0$\pm$36.6 days. Sex ratio was 60:40(M:F). The postoperative oxygen saturations were lowest after mean duration of 11 hours after the shunt procedure. The operative mortality was 8%(8) with 3 late deaths. Causes of operative death included failure of maintenance of minimum oxygenation during the procedure(2), immediate postoperative shunt occlusion(2), respiratory failure(2), low cardiac output due to heart failure and pericardial effusion(2) and sepsis(2). Late deaths resulted from acute cardiac arrest during the follow up cardiac catheterization, hypoxic myocardial failure, and arrhythmia. Year of surgery, shunt size, age at operation, and complexity of the anomalies were not the risk factors for mortality. Six month shunt patency rate was 97% and overall patency rate was 96%. Postoperative complications comprised of shunt occlusion(6), phrenic nerve palsy(3), and wound infection(2). Conclusion: We demonstrated that modified Blalock-Taussig shunt was a useful tool to palliate the infants with complex cyanotic heart disease in whom early complete repair was not feasible with acceptable mortality and patency rate. An adequate postoperative management and a meticulous surgical technique may be key factors for the better results.

• Journal of Chest Surgery
• /
• v.36 no.5
• /
• pp.309-315
• /
• 2003

Background: To avoid the adverse effects of cardiopulmonary bypass and to overcome late vein graft failure we routinely peformed off-pump total arterial coronary revascularization. Material and Method: From July 2000 to August 2001, 104 consecutive patients underwent first elective off-pump total arterial coronary revascularization. Both internal mammary, radial and gastroepiploic arteries were used. Sequential and composite grafts were used to achieve complete revascularization. Perioperative adverse events and postoperative angiograms were analyzed. Result: A total of 252 arterial conduits were used with an average of 2.47 grafts per patient. A total of 326 distal anastomosis were performed with a mean of 3.13 distal anastomosis per patient. Cross over to on-pump occurred in seven patients (6.7%). Of these 4 were due to unstable hemodynamics during lateral or posterior wall stabilization as a result of cardiomegaly and 3 were due to uncontrolled bleeding during dissection of diffusely dimunitive deeply placed intramyocardial coronary arteries. There were no opeartive deaths. Two cases of perioperative myocardial infarction and transient neurologic complications occurred, respectively. Of the 312 distal anastomoses, 308 (98.7%) were compatible with Fitz-Gibboll A or B patency grading. Conclusion: Off-pump total arterial coronary revascularization was technically feasible in most elective cases with satisfactory early results. However, on-pump coronary bypass surgery should be considered in difficult circumstances, such as cardiomegaly or unfavorable anatomy of the target coronary artery.

• Journal of the Society of Disaster Information
• /
• v.20 no.3
• /
• pp.705-713
• /
• 2024

Purpose: Currently, the only routes that enter Yeongjong Island are Yeongjong Bridge and Incheon Bridge, which are private roads. The purpose of this study is to predict and study changes in transportation demand for new routes and two existing routes according to the plan to open the 3rd Bridge, a new route, in December 2025. Method: The basic data for traffic demand forecast were O/D and NETWORK data from 2021.08, KOTI. In order to examine the reliable impact of Yeongjong Bridge and Incheon Bridge on the opening of the 3rd Bridge, it is necessary to correct the traffic distribution of Yeongjong Island and Incheon International Airport to suit reality, and in this study, the trip distribution by region was corrected and applied using Mobile Big Data. Result: As of 2026, the scheduled year of the opening of the 3rd Bridge, two alternatives, Alternative 1 (2,000 won) and Alternative 2 (4,000 won), were established and future transportation demand analysis was conducted, In the case of Alternative 1, which is similar to the existing private road toll restructuring, the traffic volume of the 3rd Bridge was predicted to be 42,836 out of 199,101 veh/day in the Yeongjong area in 2026, and the traffic volume reduction rate of the existing road was analyzed as 21.5%. Conlclusion: As a result of the review (based on Alternative 1), the proportion of convertted traffic on the 3rd Yanji Bridge was estimated to be 70% of Yeongjong Bridge and 30% of Incheon Bridge, and 21.5% of the predicted traffic reduction on the existing road when the 3rd Yanji Bridge was opened is considered appropriate considering the results of the case review and changes in conditions. It is judged that it is a way to secure the reliability of the prediction of traffic demand because communication big data is used to reflect more realistic traffic distribution when predicting future traffic demand.

• Journal of Chest Surgery
• /
• v.35 no.4
• /
• pp.283-289
• /
• 2002

Backgrouds: It is almost universally accepted that occlusive vascular diseases are best managed by anatomical reconstruction. However, the mortality and the morbidity have limited this operation for patients with high operation risks. In these patients, palliative operations such as extra-anatomic bypass and lumbar sympathectomy, are accepted as useful treatment. Material and Method: A retrospective study was conducted in 38 patients who underwent palliative operations for occlusive vascular disease at Korea University Guro Hospital between 1996 and 2000. Mean age of the patients was 60.37 $\pm$ 17.65 years, and preoperative diagnoses were atherosclerosis in 32 patients, Buerger's disease in 4 patients, Raynaud's syndrome in 1 patient and SVC syndrome in 1 patient. Result: Extra-anatomic bypass(40procedures), lumbar sympathectomy(17), thromboembolectomy(7) and femoral artery graft interposition(1) were performed. Six patients were required reoperation due to graft flow failure or fistula. Three year primary patency rate of entire operations was 78.29 $\pm$ 8.81%, and the correlation between type of operation and patency rate was not statistically significant. Conclusion: Palliative operations for occlusive vascular disease are useful treatment in limited patients with high operation risks or limited life expectancy.

• Journal of Chest Surgery
• /
• v.40 no.2 s.271
• /
• pp.136-139
• /
• 2007

Bilateral popliteal artery entrapment syndrome is a rare vascular disease, which leads to ischemic claudication as a result of disturbance to the blood flow from the abnormal relationship of the popliteal artery to the gastrocnemius muscle, a fibrous band or the popliteus muscle in the young male population. A 58-years-old male patient, complaining of ischemic claudication, coldness and 3rd toe gangrene of left leg of 1 month's duration was admitted to our institution. His left ankle-brachial index was decreased; therefore, a femoral artery angiography was peformed, which revealed a total occlusion below the distal superficial femoral artery of the left leg. An EKG revealed atrial fibrillation, suggestive of a thromboembolism of the popliteal artery due to atrial fibrillation; therefore, Urokinase thrombolysis was attempted. After the Urokinase thrombolysis, popliteal artery entrapment syndrome was diagnosed, with MRI then performed for an anatomical diagnosis. The popliteal artery entrapment was type 1, where the popliteal artery was displaced medial to the Gastrocnemius head. After complete removal of the popliteal artery aneurysm, interposition was performed with a contra lateral greater saphenous vein graft. A mild right popliteal artery aneurysm still remained, but surgery was not performed. Currently, the patent is surviving, without complications. Herein, the good results obtained for the surgical treatment of a severely affected leg, and the conservative treatment of a mildly affected leg, are reported.

• Korean journal of applied entomology
• /
• v.28 no.1
• /
• pp.10-15
• /
• 1989

This studies were carried out to selected high pathogenic nuclear polyhedrosis viruses(NPVs) against Pseudaletia(=Leucania) separata for the introduction of microbiol control of the insect NPV in Korea. Among 21 NPVs, Sesamia inferens and 4 P. separata NPV strains were highly pathogenic against P. separata when fed orchard grass leaves smeared virus suspension on the 2nd instar larvae. Three NPV strains (LsNPV-F, LsNPV-G, LsNPV-Y) were more susceptible to the younger instar than the older instar P. separata larvae when fed artificial diet mixed with the virus to the insect.