• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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• pp.133-135
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• 2008

In a design of ballast for discharge lamp, various kind of protection circuit are essential for safe operation. In this paper, overvoltage and current detection, no-load detection, lamp-fault detection, end of lamp detection for protection are introduced. Individual circuit operation and their function are described with the base that all circuit form is similar with overvoltage protection circuit.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 B
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• pp.603-605
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• 1997

The systematic and efficient operation of telecommunication power equipments is very important to the safe operation of telecommunication system. To achive that, Korea Telecom has developed a new centralized management system for telecommunication power equipments. The system configuration and main functions for the new developed system are described in this paper.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1073-1078
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• 2008

This paper is mainly concerned with the characteristics of precision stop on the automatic operating for the train car. Recently, the automatic operation of train car and the PSD establishment inside the subway are magnified. Consequently, the importance and necessity of characteristic of train car precision position stop are augmented. It researches the characteristic of precision position stop when the train car is operated with automatically and plans the safe operation of train car and the method of maintenance which is rational.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.596-602
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• 2008

Recently, there are increasing social needs for safe operation of trains and comforting for passengers. But lightning surges are responsible for serious disturbances such as damage, permanent degradation or temporary erratic operation of sensitive electronics circuits and systems. The purpose of this paper is to identify the requirements for Surge Protective Devices(SPDs) used in protecting railway signalling system. In this paper, we describes tests and requirements which establish methods for testing SPDs and determining their performance.

• 인터넷정보학회논문지
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• 제23권3호
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• pp.47-56
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• 2022

본 논문의 안전운행 보상시스템은 안전운전을 수행한 차량운전자에게 직접적인 보상을 제공하여 안전운전의 동기를 부여하고 적극적 참여를 유도함으로써 사고의 발생을 줄여 생명과 재산의 손실을 줄이는데 목표가 있다. 기존의 디지털 운행기록계의 경우 차량의 운전상태를 기록만 하였으나, 안전운전보상시스템은 사고예방 효과를 높이기 위한 지원책으로서 안전운전을 수행한 경우 금전적 보상을 통해 위험운전을 피하고 안전운전을 하도록 유도하였다. 즉, 과속으로 인한 사고 발생 빈도가 높은 지역에서는 속도 준수, 또는 차 간 거리 유지, 지정차로 운행 등의 안전운행 지시를 수행한 경우 직접적인 보상을 제공함으로써 안전운전 동기를 부여하여 교통사고를 예방하고자 한다. 이러한 안전운행 데이터와 보상내용은 투명하고 안전하게 관리되어야 하므로 보상근거와 보상내용을 폐쇄형 블록체인 하이퍼레저 패브릭을 이용하여 구축하였다. 그러나 블록체인 시스템은 투명성과 안전성이 보장되는 반면에 낮은 데이터 처리속도가 문제가 되므로 이를 개선하고자 블록생성 가속 기능을 구현하였다. 본 연구에서는 순차적으로 블록을 생성하는 속도가 10TPS(Transaction per second) 내외의 낮은 속도를 나타내어, 블록의 생성속도를 높이기 위해 가속 기능을 적용한 결과 1,000TPS 이상의 고성능 네트워크를 구현하였다.

• 한국도로학회논문집
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• 제17권6호
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• pp.117-126
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• 2015

PURPOSES : This study prioritizes potential technology for establishing a safe work zone environment on roadways. We consider almost all conceivable technologies that enable mitigation of unexpected accidents for both road workers and drivers. METHODS : This study suggests a methodology to set the priority of potential technology for establishing a safe work zone environment by using the analytical hierarchy process (AHP). For this purpose, the AHP structure was first developed. Thereafter, a web-based survey was conducted to collect experts' opinions. Based on the survey results, weights associated with the relevant criteria of the developed structure were estimated. With the consistency index (CI) and consistency ratio (CR), we verified the estimated weights. In addition, a sensitivity analysis was performed to confirm whether the estimated weights were reliable. We finally proposed the priority for potential technology for establishing a safe work zone environment on roadways. RESULTS : In the first level, safety technology has the highest priority, and real-time information delivery for work zone, hazard warning for drivers, and temporal automated operation for traffic facilities were selected in the second level of hierarchy. CONCLUSIONS : The results imply that establishing the priority will be useful to establish a future road map for improving the work environment for road workers and drivers by employing appropriate protection facilities and developing safety systems.

• Archives of Plastic Surgery
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• 제37권1호
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• pp.22-25
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• 2010

Purpose: As patients who take immediate breast reconstructions with TRAM flap have increased, concomitant or delayed other elective intra-abdominal operations in these patients also have increased. There are few reports of concomitant or delayed intra-abdominal operation in TRAM flap patients. We report our experiences and outcomes of these operations which is safe and feasible. Methods: We reviewed the charts and postoperative follow-up results of 11 patients among 471 consecutive patients who took immediate breast reconstruction with TRAM flap from December of 2002 to September of 2006. Four patients took concomitant intra-abdominal operation and 7 patients took delayed intra-abdominal operation between 1 to 52 months after TRAM flap Results: There were no significant postoperative abdominal and systemic complications. One patient who took concomitant intra-abdominal operation presented partial skin necrosis of abdomen, but recovered completely with conservative treatments. Two patients took transfusion in peri-operative periods. Conclusion: Concomitant or delayed intra-abdominal operation in immediate breast reconstruction with TRAM flap could be performed safely and feasibly when it is necessary. Furthermore, it could be helpful to patients and surgeons.

• 한국산학기술학회논문지
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• 제15권5호
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• pp.2743-2748
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• 2014

본 연구는 65세 이상 노인의 감각처리능력과 안전운전행동에 관한 상관관계를 알아보고자 하였다. 65세 이상 정상노인 31명을 대상으로 감각처리능력과 안전운전행동에 관한 설문조사를 하였으며, 수집된 자료는 피어슨 상관관계분석을 실시하였다. 감각처리능력과 안전운전행동의 총점 및 하위요인 간의 상관성이 있는 결과를 가졌다. 연구 결과를 바탕으로 노인들은 노화로 인해 감각처리능력과 안전운전행동의 어려움을 보이므로 이를 해결하기 위해서는 운전 행동에 관한 적절한 평가와 작업치료 중재가 필요하다고 사료된다.

• 한국컴퓨터정보학회논문지
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• 제9권2호
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• pp.125-130
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• 2004

정보통신과 네트워크의 발전으로 인하여 정보에 대한 보안의 중요성이 날이 갈수록 심화되고 있다. 이러한 시점에서 암호시스템들이 발전하고 있으나 비례적으로 크랙 및 해킹의 기술도 발전되고 있다. 그러므로 본 논문에서는 바이트 가변연산을 이용하여 블록암호시스템을 설계하였다. 설계된 바이트 기반 블록암호시스템은 고정된 DC 및 LC를 발생시키지 않으므로 이러한 공격방법으로부터 안전하다는 장점을 가진다. 또한 기존 대칭형 암호시스템이 가지고 있던 처리속도와 비대칭 암호시스템이 가지고 있던 인증기능을 모두 포함함으로서 네트워크 기반에서의 정보통신발달에 많은 도움을 주리라 사료된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.492-494
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• 1999

To improve safety operation of urban transit, compatible design of signaling system is most important factor at future train operation and management. Therefore, signaling system should be designed compatible transport demand of target year. In addition, signaling system should be designed improved train safety, based fail-safe principle. Most of all, to solve passenger concentration, high density and to improve efficiency of train operation. Headway improvement of train is most important. Train organization length of new urban transit as light rail is generally shorter than EMU. Therefore, to increase passenger service and operation efficiency, minimum headway of one minute in this system should be important required.