• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권5호
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• pp.1450-1470
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• 2023

In a Vehicular Cloud (VC) network, an announcement protocol plays a critical role in promoting safety and efficiency by enabling vehicles to disseminate safety-related messages. The reliability of message exchange is essential for improving traffic safety and road conditions. However, verifying the message authenticity could lead to the potential compromise of vehicle privacy, presenting a significant security challenge in the VC network. In contrast, if any misbehavior occurs, the accountable vehicle must be identifiable and removed from the network to ensure public safety. Addressing this conflict between message reliability and privacy requires a secure protocol that satisfies accountability properties while preserving user privacy. This paper presents a novel announcement protocol for secure communication in VC networks that utilizes group signature to achieve seemingly contradictory goals of reliability, privacy, and accountability. We have developed the first comprehensive announcement protocol for VC using group signature, which has been shown to improve the performance efficiency and feasibility of the VC network through performance analysis and simulation results.

• 한국전자통신학회논문지
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• 제6권1호
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• pp.1-6
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• 2011

본 연구는 재난안전 무선통신망 구축 활용을 위한 사업 중단으로 재난 관련 기관들의 무선통신망 미확보 및 장비노후화에 따라 인명 및 재산피해가 확산될 우려가 증대되고 있는 시점에서 연구 하에 예방책을 제시하고자 한다.

• 한국통신학회논문지
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• 제40권5호
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• pp.851-856
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• 2015

최근 빈번한 사고로 인해 국민들의 '안전 의식'이 고조되면서 재난안전 및 응급조치와 관련한 어플리케이션들이 관심을 모으고 있다. 이에 따라 기존의 다양한 사물들에 인터넷을 결합하는 IoT(Internet of Things) 또한 큰 관심사로 여겨지고 있으며, 이러한 IoT 기술을 활용한 방범 서비스 어플리케이션이 개발되고 있다. 하지만, 기존의 방범 시스템 서비스용 어플리케이션들은 단순한 사용자 위치 정보를 파악하는 수준에서 구현되어 있으며 어플리케이션이 독립적으로 실행되기 때문에 안전사고에 유연하게 대처하지 못하는 문제가 발생한다. 본 논문에서는 사용자 위치 정보 및 다양한 센서 정보를 활용하여 위험상황을 감지하고, 가로등 제어 모듈과의 통신을 통하여 보다 안전하고 효율적인 방범 서비스를 제공할 수 있는 스마트 방범 서비스 구조를 제안한다. 또한, 비인가 사용자로 인한 오작동을 회피하기 위해 사용자 단말의 고유 정보를 이용한 통신 구조를 제안한다.

• 한국재난정보학회 논문집
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• 제18권3호
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• pp.507-519
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• 2022

연구목적: 소규모 사업장에서 중대재해처벌법의 안전보건 확보의무를 준수하는 효율적이고 실무적인 방안을 제시하고자 한다. 연구방법: 문헌연구와 선행연구를 바탕으로 안전보건경영시스템과의 연계, 프로세스 접근방법 등을 활용한 중대재해처벌법 준수방안을 검토하였다. 연구결과: 안전보건경영시스템을 충실히 이행하면 중대재해처벌법의 안전보건 확보의무를 준수할 수 있음을 확인하였다. 그리고 안전보건 확보의무를 이행하고 점검하는 방법론을 제시하였다. 결론: 프로세스 접근방법과 이행점검 체크리스트를 적극 활용하여 안전보건경영시스템을 운영하면 중대재해처벌법 준수는 물론 안전보건경영시스템의 지속적 개선이 가능할 것으로 판단된다.

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2009년도 정기총회 및 국제심포지엄
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• pp.93-115
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• 2009

There are growing public concerns over crop and food safeties due to the elevated levels of heavy metals grown in contaminated soil. Heavy metals are classified as the chemical harmful risks for crop and food safety. With implementation of GAP, crop safety is controlled by many regulatory options for soil, irrigation water and fertilizers. Any attempt to retard the metal uptake by crops may be the best protocol to secure crop and food safety. This article reviews the management strategies for heavy metals in view of crop safety in Korea and demonstrates results from the field experiments to retard metal translocation from soil to crops by using chemical amendments and soil layer management methods. Major source of soil pollution by heavy metals has been related with mining activities. Risk assessment revealed that rice consumption and groundwater ingestion in the abandoned mining areas were the major exposure pathways for metals to human and the heavy metal showed the toxic effects on human health. Chemical amendments such as lime and slag retarded Cd uptake by rice (Oryza sativa L.) by increasing soil pH, lowering the phytoavailable Cd concentration in soil solution, immobilizing Cd in soil and converting the available Cd fractions into non-available fractions. The soil layer management methods decreased the Cd uptake by 76% and Pb by 60%. Either reversing the surface layer with subsurface layer or immobilization of metals with layer mixing with lime was considered to be the practical option for the in-situ remediation of the contaminated paddy soils. Combination of chemical soil amendments and layer management methods was efficient to retard the metal bioavailability and thus to secure crop safety for heavy metals. This protocol seems to be cheap, relatively easy to practice and practical in the agricultural fields. However, a long term monitoring work should be followed to verify the efficiency of this protocol.

• 한국안전학회지
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• 제31권6호
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• pp.1-5
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• 2016

A bicycle is one of the most popular sporting goods in view of a sport activity and a human health. Metallic materials such as steel, aluminum, etc. were mainly used to the bicycle fork in the past. Nowadays, the carbon fiber reinforced composite materials are widely used to the manufacturing of a bicycle fork to reduce the weight and to increase the efficiency. Safety is a most important design parameter of a bicycle fork even if the weight and cost reduction are important. Bicycle failure may happen at the critical spot of a bicycle fork and cause the accident. In this paper, the composite bicycle fork will be analyzed to secure the safety and detect a critical spot by using the finite element method with Tsai-Wu failure criterion. The stress data were obtained for the laminated composites with various number of plies and fiber orientation under the bending load. Thus, design concept of a bicycle fork was proposed to secure the safety of a bicycle. The finite element analysis results show that the connection area between a steer tube and a fork blade is critical spot, and 75 or more layers of 0 degree are needed to secure the safety of a bicycle fork.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1587-1591
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• 2009

Safety of railroad is result of reliability which is received from test & evaluation of system. Railroad system is consisted of various sub system such as vehicle, supply of electric power, signal, communication, rail track construction, operation. To secure safety of railroad, evaluation about parts, assembly, sub system, whole system etc.. that compose railroad is essential. In this paper, I wish to describe for results that analyze korean tilting vehicle's derailment coefficient developed by national research achievement. Result that evaluation korean tilting vehicle's running safety, verified that secure even if speed-up 30 km/h than operating speed of present in curved track.

• 자동차안전학회지
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• 제15권1호
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• pp.7-15
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• 2023

The purpose of this study is to predict the dynamic behavior of clamshell hood system on the harsh road driving condition, and secure the safety and durability performance of the system. The equation of motion of hood system is derived and the numerical analysis is implemented to obtain the lateral movement of the hood system. Also, the actual Belgian road test results are correlated to the predicted ones, and confirm the reliability of the system. Then, the parameter study is conducted to figure out the sensitive factors to affect the dynamic behavior, and the engineering design guide to make the system robust to confine the minimum friction force generated from hood latch and maximum hood weight is suggested from this research.

• International Journal of Safety
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• 제10권2호
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• pp.27-31
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• 2011

As safety-related regulations for signaling systems are standardized to IEC 61508 and 62425, and others at the international level, safety activities and its verification are required. And also there is need to develop technologies for safety improvement to secure safety signaling systems in terms of technologies for safety activities on each life-cycle. In this paper it is reviewed the safety activity processes and technologies each steps of proposed processes respectively for railway signaling systems.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (A)
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• pp.211-213
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• 2004

무선 인터넷의 활성화와 더불어, 사용자 인증을 위해 801.1x EAP, CHAP 및 PAP를 이용한 다양한 인증 방식이 사용되고 있다. 그 중에서도 RADIUS 및 CiscoSecure ACS와 같은 인증 서버에서는 RSA의 SecureID 및 S/Key와 같은 일회용 패스워드 방식을 지원하고 있다. 본 논문에서는 Casper 도구를 사용하여 CiscoSecure ACS 환경에서 동작하는 일회용 패스워드 방식을 명세하고, 모델체킹 도구인 FDR을 이용하여 안전성을 분석하였다.