• Explosives and Blasting
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• v.39 no.3
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• pp.24-34
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• 2021

Electronic detonators are widely used in various construction sites due to accurate delay time. Including the cases with exceeded noise and vibration from site using electric/non-electric detonator, electronic detonators are used to improve blast fragmentation or to reduce the cost of secondary partial blasting. Furthermore, the number of cases using electronic detonators are increased for reduction of the cost and construction period by maximizing operations efficiency. This case study is about applying electronic detonators on large section station, tunnel construction site which is the part of urban area GTX A project. Although it was initially planned to utilize non-electric detonators, damage was inflicted on safety-thing. We have considered blasting method using electronic detonators as solution of this problem. By applying electronic detonators, we not only satisfied environmental regulations but also prevented nearby safety-thing from getting damaged. In addition, we were able to shorten the construction period than the initial plan by conducting single simultaneous blasting on large section station, in order to ensure safe and efficient construction.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.1
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• pp.65-75
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• 2011

Power Line Communication (PLC) is a system for carrying data on a conductor used for electric power transmission. Recently, PLC has received much attention due to connection efficiency and possibility of extension. It can be used for not only alternative communication, in which communication line is not sufficient, but also for communication between home appliances. Korea Electronic Power Cooperation (KEPCO) is constructing the system, which automatically collects values of power consumption of every household. Due to the randomness and complicated physical characteristics of PLC protocol (KS X4600-1), it has been believed that the current PLC is secure in the sense that it is hard that an attacker guesses or modifies the value of power consumption. However, we show that the randomness of the protocol is closely related to state of the communication line and thus anyone can easily guess the randomness by checking the state of the communication line. In order to analyze the security of PLC, we study the protocol in detail and show some vulnerability. In addition, we suggest that PLC needs more secure protocol on higher layers. We expect that the study of PLC help in designing more secure protocol as well.

• Explosives and Blasting
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• v.40 no.1
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• pp.29-38
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• 2022

Electronic detonators are now widely used in various construction sites and quarry mines. Including the sites where safety-thing is located nearby, Cases of using electronic detonators are increasing to maximize operational efficiency by improving blast fragmentation or reducing the cost of secondary blasting. This case study is about applying for electronic detonators on zone 00 construction site, which is the part of urban area metropolitan express rail A line project. Although the project was initially planned to utilize non-electric detonators, Electronic detonators are considered as the solution not only for safe and fast excavation, but also to minimize civil complaint and the damage of safety-thing. By applying electronic detonators, we were able to satisfy environmental regulations standards and prevent nearby safety-thing from getting damaged.

• Journal of Korea Port Economic Association
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• v.39 no.4
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• pp.127-145
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• 2023

As the importance of strengthening port security is increasing, it is necessary to conduct a perceptual study on port facility users who pay for port security services first. This study aims to identify improvements in the port security function of Busan Port and contribute to the future development of port security in Korea. A total of 125 questionnaires were collected from port facility security fee collectors at Busan Port. Based on the collected data, exploratory factor analysis, traditional IPA, and modified IPA were conducted. In conclusion, first, the physical function of port security is the most important and should be continuously maintained and strengthened. Second, improving the professionalism of port security personnel is most urgent, and the port security education system needs to be improved. Finally, it is necessary to gradually develop the port security information service function in consideration of future development possibilities.

• The Korean Journal of Air & Space Law and Policy
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• v.19 no.1
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• pp.165-182
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• 2004

According to the Annex 17 to the Convention on International Civil Aviation, an appropriate authority of each contracting state has to define and allocate tasks and coordinate activities between the departments, agencies and other organizations of the State, airport and aircraft operators and other entities concerned with or responsible for the implementation of various aspects of the national civil aviation security programme. It is generally recognized that the three major parties responsible for the aviation security at an airport are appropriate government departments, airport operator and airlines. The airlines are the beneficiaries of security activities as well as the provider of security activities. So, their responsibilities have been critical in protecting civil aviation from unlawful interferences. The airport has to take leading role in implementing security tasks at airport area because the airport operator is the provider of airport facilities and services to its customer and the security activities belong to its services. The government has the responsibilities not only for establishing regulatory system but also for oversighting the implementation of aviation security activities. The paper is to review the revision of aviation security regulation and the changes of aviation security responsibilities, and costs and task assignment in Republic of Korea after September 11 event. The responsibilities, tasks and costs assigned to airlines, airport operators and government are introduced and evaluated in terms of economic fairness, effectiveness and efficiency of aviation security activities. The drawbacks of new legal system are pointed out and the suggestions to remedy them are proposed as conclusions.

• KEPCO Journal on Electric Power and Energy
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• v.3 no.2
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• pp.73-78
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• 2017

Recently, a number of foreign electric power companies including domestic Korea Electric Power Corporation (KEPCO) have actively engaged in the construction of a power grid with the concept of a smart grid. The Smart grid is a technology that increases the efficiency of the power by converging the information network with the power grid. It can maximize the energy efficiency through the two-way communication between the utility and the consumer. However, as the power grid converges with the information and communication network, security threats are increasing more than existing power grids. Due to the nature of the power grid, the damage caused by security threats is not only personal privacy but also economic loss of society. So smart grid becomes the target of hackers. In this paper, we discuss security vulnerabilities of Advanced Metering Infrastructure (AMI), which is a core technology of smart grid construction, and the corresponding security technologies to prevent security damage of smart grid.

• 전기의세계
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• v.22 no.4
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• pp.42-46
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• 1973

오늘날 전기전자기기의 보급과 그 이용율은 곧 한나라의 경제수준을 평가할 수 있는 척도가 된다. 최근 우리의 전력수요는 급격히 증가일로에 있고 특히 농어촌 전화사업의 추진은 전력수요를 더욱 가속 시킬것이다. 전력수요의 팽창은 생활수준의 향상을 의미하는 반면 전기화재를 초래할 수 있는 기회를 증가시킨다. 최근 일본에서는 종래의 전기공작물규정을 폐지하고, 새로운 보안체제에 입각한 전기설비기술기준(제1장 총칙 - 제6장 전기철도 및 부칙으로 총 284조임)을 1965년 6월 15일에 제정공포하였고, 그후 1968년 및 1972년의 2회에 걸쳐 이를 개정함으로써 기술혁신과 사회정세에 대응 반영시켰다. 특히 이번 (1972년)개정에는 전선, 접지공사, 전로 및 전기사용장소분야에서 감전방지 및 저압전로의 지락보호(41조)의 관점에서 대폭수정하였고, 옥내배선의 경제성을 고려하여 자열전등등 특수 가정용 전기기기의 설치시 별도 공사방법의 도입으로 대지전압을 150V에서 300V까지 높인 점이 그 특징이다. 본고는 전기화재의 관점에서 본 누전, 감전 및 이의 대책에 대하여 현재까지 알려진 대책을 설명한 후, 우리의 배전계통에서 생각할수있는 문제점 몇가지를 제시하려고 한다.

• 전기의세계
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• v.46 no.7
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• pp.68-71
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• 1997

지중선은 가공선에 비해 공급신뢰성이 높고, 설비보안에 유리하며, 도시미관을 저해하지 않는 장점이 있지만 공사비가 가공선의 12-20배 정도 고가이어서 공사에 막대한 투자비가 소요되기 때문에 가공선건설이 곤란한 도심지역을 제외하고는 지중선건설을 지양하고 있다. 그러나 국가경제가 성장함에 따라 국민생활권이 도심지로 집중하면서 도시가 와밀해졌고 이로 인해 도심부하가 급증하여 오히려 지중선건설은 날로 증가하고 있는 실정이다. 또한 지중선건설에는 막대한 투자재원 확보외에도 사업에 어려움이 많은데 그중에 대표적인 것이 지중토목설비를 적기에 건설하는 것으로서 이 어려움은 앞으로의 차량증가에 따른 도로혼잡과 함께 더욱 심화될 전망이며 이에 대한 근본대책 마련이 시급하다. 이상과 같은 관점에서 볼 때 향후 지중선분야 기술은 케이블 compact화 및 저손실 대용량 케이블 및 신공법 개발에 주력해야 할 것이다. 특히 막대한 투자비를 들여 건설한 지중선은 그 수명기간동안에 고장없이 고품질의 전력을 수용가에 공급하는데 이상이 없어야 하며, 이는 설비운영의 과학화를 통하여 지속적으로 케이블 성능을 보존하므로서 가능하다고 하겠다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.117-118
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• 2019

부산항만은 년간 천만 TEU 이상의 환적 물돌량을 처리하는 세계 2위 환적항이다. 이러한 환적 물량을 효과적으로 처리하기 위해서는 선사, 운송사, 트럭, 터미널 등 각 이해관계자간 정보의 신속하고 정확한 전달이 중요하나, 현재는 정보전달 방법이 다양하고, 정보 공유가 미흡하여 차량 대기, 정보의 누락, 터미널 혼잡 등 문제가 발생하고 있다. 이를 해결하기 위해 부산항만공사는 블록체인 기술을 활용하여 이해관계자 간에 정보를 실시간 공유함으로써 작업 우선순위를 고려한 운송계획 등을 수립할 수 있도록 하여 운송 효율을 높이기 위한 노력을 하고 있다. 본 사례 발표에서는 부산항의 ITT 관련 문제점 및 개선 방안, 향후 계획 등에 대해 논의하고자 한다.

• Annual Conference of KIPS
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• 2016.10a
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• pp.837-838
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• 2016

최근 IoT 기술의 발전과 함께 스마트홈 기술의 발달과 Drone을 사용하는 사용자가 꾸준히 늘어나고 있는 추세이다. 스마트홈 시스템의 보안카메라는 정해진 구역을 모니터링 할 수 밖에 없다는 단점을 가지고 있다. 이러한 한계를 극복하고자, 본 논문에서는 사용자가 입력한 목적지로 실내에 미리 배치된 Drone이 이동하여 해당 목적지를 비춰줄 수 있도록 실내 보안카메라 기술을 Drone으로 대체할 수 있는 방법을 제안한다. 목적지를 인식하기 위해 실내에 위치한 Drone과 목적지의 위치값을 알아야 한다. 실내에선 GPS 좌표값을 알 수 없기 때문에 BLE Beacon이 발생시키는 신호를 이용하여 상호간의 통신을 통해 위치, 거리를 계산하도록 한다. 이러한 방식을 적용시킨다면 매번 모니터링이 필요한 구역에 새로 보안카메라를 설치하거나 배선공사하는 불편함 없이 하나의 Drone 하드웨어를 이용한 전방위 모니터링이 가능해 질 것으로 기대한다.