• Information Systems Review
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• v.20 no.3
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• pp.51-71
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• 2018

Many studies in the field of information security reveal the need to increase awareness. However, although awareness of information security has been raised to a considerable extent, actual security behavior has been shown to fall short of that. Therefore, we wanted to identify the role of psychological factors in making information security decisions by conducting a experimental study. The results show that there are differences in perception of information security risks according to the probabilistic distance and the degree of relative optimism due to social distance. In relation to their relative optimism and intention of information security, they reduced the level of perceived risk compared to those close to them and found that their influence varied according to their probabilistic distance. This study has made valuable attempt in terms of methodology and it is meaningful that the psychological factor is taken into consideration for the information protection behavior, so that the range of relative optimism that actually affects the perception of risk is narrowed. It is expected to contribute to the improvement of information security level of information technology users and protection of information assets by empirically identifying necessity of various approaches to decision making process for information security.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.2
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• pp.19-24
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• 2010

This paper analyzes potential interference effect of DTV service on Radio Microphone in adjacent channel. For analysis, we assume that DTV operates on CH 51(692 MHz ~ 698 MHz) and radio microphone operates on CH 52 (698 MHz ~ 704 MHz) according to the Korea Communications Commission policy. Minimum Coupling Loss(MCL) method is used to determine the required protection distance and Monte Carlo method is used to determine guard band to meet interference probability of 0 % below. In conclusions, protection distance of 1.71 km and guard band of 2.4 MHz are required for indoor and protection distance of 18.86 km and guard band of 5.7 MHz are required for outdoor.

• Proceedings of the KIEE Conference
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• 2004.05b
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• pp.203-206
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• 2004

IEC에 의하면 낙뢰의 보호효율은 1등급(최대98%), 2등급(최대95%), 3등급(최대90%), 4등급(최대80%)으로 나타내고 있으며, 광역피뢰침은 다수설치해야 하는 돌침형 피뢰침의 수량을 기술적으로 최소화 하여 건축물의 안전성과 경제성 등을 향상시키는 역할을 담당하고 있다. 그러나 이런 보호 능력은 설계 및 시공시 세심한 배려가 필요하다. 프랑스에서는 피격거리 60M를 한계로 하며 미국에서는 안전성을 좀더 신경 써 괴격거리 45M를 한계로 가능한 보호효율을 높이고 있는 실정이다. 광역피뢰침의 선정시 보호범위의 최대치 적용은 지양하고 보호 효율을 높여 적용함이 바람직하다. 또한 초고층 빌딩 및 APT단지의 경우 가급적 보호등급을 1등급으로 적용하는 세심한 배려가 필요하다. 시공시 광역피뢰침은 수평면 최고 돌출물(예:옥탈 및 안테나 등)의 설치 높이의 차는 2M이상이 필요하며 이격거리 또한 가급적 최대로 하는 것이 바람직하다.

• Journal of Advanced Marine Engineering and Technology
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• v.36 no.2
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• pp.294-301
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• 2012

Shipbuilding industry has used a lot of $CO_2$ gas as a shielding gas for arc welding and thus, development of welding equipment which can reduce the amount of $CO_2$ gas is requested widely. Therefore, this study is focused on the examination of optimum welding torch distance of Tandem welding system as a fundamental study for the optimum shape design of torch nozzle. $CO_2$ shielding gas distribution and welding bead shape formation by the torch distance are examined. Results show that according to the torch distance variation, most effective shielding gas layer can be formed and quantitative determination of the optimum torch distance can result in the reduction of $CO_2$ shielding gas consumption.

• Review of KIISC
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• v.4 no.1
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• pp.88-95
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• 1994

본 논문에서는 벡터 부울함수의 비선형성의 척도인 선형 함수군까지의 거리에 대해 알아본다. 특히 S-Box의 내부 함수로 이용될 수 있는 출력의 균등 분포성을 만족하는 벡터 부울함수의 선형함수군까지의 거리의 하계를 유도한다. 더불어 EDS에서의 S-Box내부함수의 비선형도를 산출하고 보다 비선형도가 높은, 즉 선형 함수군까지으 거리가 더 먼 새로운 S-Box의 존재를 밝힌다.

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.312-314
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• 2002

송전선로에 고장발생시 해당선로에 취부된 디지털 보호계전기의 보조기능인 거리표정의 신뢰도를 확인하기 위하여 보호계전기 제작사, 고장종류, 계전기 TYPE별로 거리 표정결과와 실제 고장점과의 오차 등에 대하여 세부적으로 통계 분석을 실시 하였다.

• 정보보호뉴스
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• s.134
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• pp.8-8
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• 2008

인생과 자주 비교되는 스포츠가 마라톤이다. 마라톤의 42.195km는 두 다리를 쉼 없이 움직여도 최소 2시간 이상을 달려야 도달 가능한 거리. 이 긴 거리를 자신과의 싸움으로 극복해야 한다는 점, 그리고 결승점을 통과하기 위해 힘든 과정을 이겨내야 한다는 점이 그 이유다. KISA 마라톤 동호회가 42.195km를 준비하기 위해 10km 단축 마라톤에서 그 실력을 가늠해 봤다. 출발선에서 느끼는 부담감에서부터 완주의 기쁨까지, 그들의 속마음을 들여다봤다.

• Journal of Satellite, Information and Communications
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• v.6 no.1
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• pp.63-67
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• 2011

This paper analyzes the interference effect of ISM(Industrial Scientific Medical) equipment on WLAN in order to protect WLAN in interference environment which WLAN Station is close to ISM equipment. CISPR(International Special Committee on Radio Interference) radiation limit standard was used for interfering power of ISM equipment. Then, MCL(Minimum Coupling Loss) which is for the worst case and MC(Monte Carlo) which is based on statistic interference probability are used to get protection distance. As a result, the protection distance of 105 m was calculated by using MCL for the worst case. And, the protection distance of 17 m was calculated by using MC for statistic analysis.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37C no.12
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• pp.1211-1221
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• 2012

This paper describes separation distance to protect radiocommunication services from the interference of inductive systems using frequencies below 30 MHz for the co-existence between radiocommunication services and inductive systems. For the analysis, the interference scenario model is proposed between inductive system and radiocommunication services. Then the calculation method of protection distance is suggested by comparing the radiation power of inductive system with the allowable interference level of victim services, radiocommunication services, according to the applied propagation model. Also, the protection distance for protecting radiocommunication services in the 30 MHz below is calculated through the interference analysis from RFID(Radio Frequency IDentification) and PDP(Plasma Display Panel) TV based on the suggested method. The proposed calculation method was adopted as ITU-R recommendation in related with resolution 63 at ITU-R SG(Study Group) 1 meeting in June, 2012. It will be available to use for the protection of radiocommunication services from the interference of wireless power transfer system and power line telecommunication system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.101-105
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• 2011

This paper calculates protection distance to protect WiBro service from ISM(Industrial Scientific Medical) equipment which is used in the same frequency with WiBro. We analyze with a scenario that WiBro receiver is closed to ISM equipment which has interfering power of CISPR(International Special Committee on Radio Interference) 11 limit. As a result, the protection distance of 14 m was calculated by using MCL (Minimum Coupling Loss) for the worst case. And, the protection distance of 10 m was calculated to meet 5 % interference probability below by using MC(Monte Carlo) for statistic analysis in case of a interferer.