• 한국재난정보학회 논문집
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• 제19권4호
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• pp.958-967
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• 2023

연구목적: 본 연구는 화재위험도가 높은 플랜트 시설물에 적용하고 있는 국내 내화성능을 분석하고 적합한 내화저항성능을 확보하여 플랜트 시설물의 화재 안전성을 확보하고자 한다. 연구방법:유한요소해석 프로그램인 Ansys를 활용하여 화재하중과 내화피복을 변수로 열전달 해석과 구조해석을 수행하고 해석 결과에 따른 플랜트 시설물의 내화성능을 분석하였다. 연구결과: 국내 플랜트 시설물에 적용된 내화피복은 UL 1709에 제시된 탄화수소화재의 화재하중을 적용하였을 때 내화성능을 확보하지 못하였으며 화재 후 강재의 변형 또한 크게 나타남을 확인하였다. 결론:현재 플랜트 시설물에 적용된 국내의 내화성능은 석유화학 플랜트 등과 같이 급격한 화재성장과 큰 화재하중에서 내화성능을 확보할 수 없으며 플랜트 시설물의 성능평가를 통해 적합한 내화성능을 평가하여 화재 안전성을 확보하여야 한다.

• 한국항해항만학회지
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• 제29권3호
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• pp.181-187
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• 2005

국내 최초로 운항예정인 수륙양용 아쿠아버스의 운항 리스크를 낮추고 안전을 확보하기 위하여 운항예정 해역인 월미도와 영종도간 수로에 대한 자연적환경과 해상교통량을 조사하고, 그들의 위험요소를 분석하였다. 그리고 아쿠아버스의 통항 안전 확보를 위하여 경계수역 지성, 잔용선착장 설치, 운항관리 방안 등을 제안하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2004년도 춘계학술대회 논문집
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• pp.311-316
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• 2004

항만을 출입항하는 선박의 통항 안전을 확보하기 위해서는 방파제와 같은 항만 시설물의 설계 또는 배치시에는 우선적으로 선박의 조종 성능을 감안하여 교통 흐름이 원활하도록 적정한 항로를 지정하여야 한다. 이 연구에서는 부산항 및 감천항 입항을 위해 방파제 인접 항로에서 일정 침로로 접근하는 컨테이너 선박이 외력인 바람, 조류, 파랑에 의해 선체에 발생하는 횡압류 및 회두 현상을 정량적으로 분석하여, 선속에 따라 외력을 상쇄하기 위해 취해야 할 대응타각을 산출한다. 또한 향후 방파제 설계 및 배치시 고려해야 될 외력하의 선박의 조종 성능 요소를 제안함과 동시에 방파제의 설계와 항로 배치와의 관계에 대하여 고찰한다.

• 정보학연구
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• 제3권3호
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• pp.77-88
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• 2000

인터넷인구의 급속한 증가와 함께 전자상거래 역시 놀라운 증가 추세를 보이고 있다 그러나 전자상거래의 지급결제시스템은 여전히 신용카드와 온라인 입금 방식 위주로 이루어지고 있다. 그러나 이들 결제수단은 전자상거래 지급시스템으로는 불충분하다. 따라서 새로운 결제수단인 전자화폐를 전자상거래 지급수단으로 사용하기 위한 상용화 실험이 전세계에서 다양하게 시도되고 있으며 우리 나라의 경우에도 IC카드형은 금융기관을 중심으로 네트워크형은 전자상거래 관련 업체를 중심으로 상용화 실험이 활발히 진행 중에 있다 그러나 이들이 전자상거래 결제수단으로 자리잡기에는 몇 가지 과제가 있다. 특히 범용성확보를 위한 표준화 작업과 지불의 안정성과 가치의 안정성 확보를 위하여 난립하고 있는 전자화폐 발행 업체의 정비 및 엄격한 규제와 함께 예금보호 적용여부도 신중히 검토할 필요가 있다. 또한 전자상거래 업체들의 전자화폐 기피 현상을 해소할 수 있는 정책적 배려가 요청된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.92-93
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• 2021

In the case of medical facilities, the evacuation time is delayed due to the decrease in the number of people in the hallway and exits due to the increase in the width of evacuation by using mobile beds, wheelchairs, crutches, etc. Accordingly, it is considered to secure evacuation capacity to reduce evacuation time according to corridor width and exit width. Accordingly, we would like to compare the standards related to the evacuation capacity of medical facilities in Korea and NFPA, derive differences, and use evacuation simulations to compare evacuation times according to changes in corridor width and exit width. In Korea, it is calculated based on the floor area by use, but in the case of NFPA 101, the number of evacuation routes, stair width, corridor exit width, and two-way door width was stipulated depending on the number of people. Using evacuation simulation, efficient evacuation capacity is calculated according to the reduction of evacuation time by changing the width of the hallway, changing the width of the exit, the width of the corridor, and the width of the exit. The evacuation simulation is intended to be used to secure evacuation safety of domestic medical facilities by calculating the effective evacuation time reduction by changing the width of the hallway and exit.

• 디지털산업정보학회논문지
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• 제17권4호
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• pp.43-52
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• 2021

IoT applications are quickly spread in many fields. Blockchain methods(BC), defined as a distributed sharing mechanism, offer excellent support for IoT evolution. The BC provides a secure way for communication between IoT devices. However, the IoT environments are threatened by hacker attacks and malicious intrusions. The IoT applications security are faced with three challenges: intrusions and attacks detection, secure communication, and compressed storage information. This paper proposed a system based on double-blockchain to improve the communication transactions' safety and enhance the information compression method for the stored data. Information security is enhanced by using an Ellipse Curve Cryptography(ECC) considered in a double-blockchain case. The data compression is ensured by the Compressed Sensing(CS) method. The conducted experimentation reveals that the proposed method is more accurate in security and storage performance than previous related works.

• 디지털산업정보학회논문지
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• 제15권2호
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• pp.11-17
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• 2019

As interest in the efficiency use of energy has been recently rising, studies have been performed in utilizing various types of eco-friendly green energy and natural energy. Especially there has been rapidly increase in the fields using ESS (Energy Storage System), which is the technology for storing the energy from nature. The application fields of ESS is continuously growing and expanding to various types of technologies. However, in recent years there have been continuing problems with the safety of ESS. And related researches are going on. In this paper, we has proposed a system structure to utilize more secure ESS and has monitored the system status of ESS in real time by using smart phone app. This paper has also proposed a new method to configure secure ESS by implementing GUI (Graphical User Interface) to control the system. And then explain experimental results to investigate the efficiency of the proposed ESS.

• International Journal of Computer Science & Network Security
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• 제21권6호
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• pp.119-126
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• 2021

The Internet of Things (IoT) applications are quickly spread in many fields. Blockchain methods (BC), defined as a distributed sharing mechanism, offer excellent support for IoT evolution. The BC provides a secure way for communication between IoT devices. However, the IoT environments are threatened by hacker attacks and malicious intrusions. The IoT applications security are faced with three challenges: intrusions and attacks detection, secure communication, and compressed storage information. This paper proposed a system based on double-blockchain to improve the communication transactions' safety and enhance the information compression method for the stored data. Information security is enhanced by using an Ellipse Curve Cryptography (ECC) considered in a double-blockchain case. The data compression is ensured by the Compressed Sensing (CS) method. The conducted experimentation reveals that the proposed method is more accurate in security and storage performance than previous related works.

• Structural Engineering and Mechanics
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• 제90권6호
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• pp.531-542
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• 2024

This study proposes a ground anchor using electromagnetic induction and utilizes an extended structure using hinges and links and mounting and sensing using electromagnets. The aim is to secure the anchor force, excluding grout, and to secure various sensing capabilities, including ground behavior. We propose a design based on the drilling diameter of 150 mm, and the materials used were STS304 and Aluminum 6061-T6. Computerized analysis was performed to confirm structural safety and functional implementation. The pull-out experiment was conducted by simulating the bedrock environment on a model earthwork as an experiment to check whether anchor force was generated by the insertion and tension of the anchor. The environmental pollution of grout, the difficulty of removing strands, and the inability to check whether the anchor is seated, which were pointed out as disadvantages of the existing ground anchor, were solved. Therefore, this study suggest that it can be effectively utilized as a secure and monitored anchoring solution in eco-friendly construction practices, including the installation of landslide prevention barriers.

• 한국항공운항학회지
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• 제24권2호
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• pp.59-67
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• 2016

The checklist currently used for Aviation safety inspection performed by ASIs consists of inspection groups and multiple items, it does not have structured hierarchy system which required to efficiently process aviation safety analysis. On this study, through mapping taxonomy of HFACS onto current checklist to secure structured hierarchy system and present a specification on systematic frequency and severity to perform safety risk assessment of detected hazard.