• Review of KIISC
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• v.15 no.3
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• pp.69-75
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• 2005

특정 또는 불특정 네트워크를 공격 대상으로 하는 인터넷 웜, 분산서비스거부 공격 등의 출현과 가공할 파괴력으로 인해 네트워크에 대한 보안 요구가 점차 증가하고 있다. 침입탐지시스템 등의 네트워크 보안 솔루션은 네트워크 공격에 대한 감시 및 차단 등의 기능을 제공하며 기술적인 진화를 거듭하고 있지만, 근본적인 한계로써 국부 감시로 인한 불명확성과 오탐에 의한 보안경보$^{1)}$ 플러딩 등이 지적되고 있다. 특히 보안경보의 플러딩 현상은 네트워크 보안 상태를 정확하게 판단하는 것을 방해함으로써 조기경보체제의 구축을 어렵게 하는 요인이 되고 있다. 최근 이러한 부분을 극복하기 위해 보안경보 간의 상호 연관성 분석에 대한 연구가 활발해 지고 있다. 본 논문에서는 보안경보에 대한 연관성 분석 동향에 대해서 논의한다. 또한 보안경보의 집단화(aggregation)를 이용한 네트워크 공격 상황 분석방안에 대해서도 논의한다. 보안경보의 집단화를 이용한 공격 상황 분석은 엄청나게 발생하는 보안경보로부터 조기경보를 위한 공격 정보의 판별과 광역 네트워크상에서 이상 현상의 탐지를 가능하게 한다. 이와 더불어 현재 ETRI에서 개발 중에 있는 네트워크 공격 상황 분석기인 NASA(Network Attack Situation Analyzer)에 대해서도 간략히 소개한다.

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.18
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• pp.42-46
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• 2005

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.12 no.2
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• pp.81-100
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• 1983

이 글은 본인이 1982년 9월부터 11월까지 약 2개월간 일본 자치성 소방연구소에서 연수중에 지도 받은 내용으로서 고층건물 등 대형건물에서 화재의 조기 감지 및 오동작억제에 많은 문제점이 대두되고 있어 동 연구소의 죽원소부씨와 도변창부씨가 공동 연구한 결과이다. 연기감지기의 작동에 영향을 미치는 연소 생성물에 대한 근본적인 연구 결과는 우리나라도 '86 Asian Game 및 '88 Olympic 등을 대비한 대형 Hotel등의 조기 화재 경보 체제를 위해 많은 도움이 될 것으로 사료되어 소개한다.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2006.05a
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• pp.245-262
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• 2006

지식과 정보의 창출, 확산은 국가혁신의 원동력으로 크게 부각되고 있어 선진국은 체계적이고 수요자 지향적인 과학기술종합정보시스템(NTIS)을 구축하고 있다. 그러나 우리나라는 그 동안의 노력에도 불구하고 기관별 상호 연계성 미흡, 중복 개발 운영되어 효율성이 낮고, 연구성과 관리가 어렵고 활용도가 저조하였다. 이에 정부는 기술, 시장, 산업, 인력 등이 연계된 전주기 종합정보서비스체제를 구축하여 과학기술정보종합상황판 구축 활용하고자 한다. 언제, 어디서나 편리하게 이용할 수 있는 시스템 구축으로 하나의 창구로 종합적인 과학기술 정보의 획득이 가능하게 되고 국가연구개발 상황을 종합적으로 파악, 분석하여 투명하고 개방적인 연구관리 지원체제로 지식 정보의 체계적인 창출, 확산, 활용 및 공유를 통해 연구개발 생산성 제고 및 새로운 혁신체제를 구축할 계획이다. NTIS 구축의 향후 과제로는 (1) 연구기획 강화를 위한 R&D모니터 및 조기경보시스템 구축, (2) NTIS 표준화의 선결적 추진이 요구된다. 4가지 표준화 영역 중 기술요소표준을 제외한 3개 영역은 별도의 표준화 과제 수행을 통해 추진하되 분류표준 중 기술분류 표준은 인력, 장비, 기자재는 물론, 사업/프로그램 및 과제관리기관 등과 관련성을 가지므로 NTIS표준화의 핵심이 될 것이다.

• Economic and Environmental Geology
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• v.42 no.2
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• pp.143-152
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• 2009

Recent raw material prices fluctuation has been unexpectedly high and that made Korean economic activities to be depressed. Because most raw material supply in Korea depends upon oversea imports, unexpected raw material price fluctuation affects Korean industrial economies through macroeconomic variables. So Korean government enforces some political measures such as demand management and the supply-security assurance as long-range policies, and reservation and general early warning system as short-range policies. In short-range policies, it is necessary to be expected short term fluctuation. Up to recently, there have been many researches and most of those researches use parametric methods or time series analyses. Because those methods and analyses often generate inadequate relations among variables, it is possible that some consistent variables are left out or the results are misunderstood. This study, therefore, is aim to mitigate those methodological problems and find the relatively appropriate model for economic explanation. So that, in this paper, by using non-parametric signal approach method mitigating some shortages of previous researches and forecasting properly short-range prices fluctuation of non-ferrous materials are presented empirically.

• The Journal of Engineering Geology
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• v.23 no.3
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• pp.305-314
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• 2013

Recent international and national research trends in landslide hazards were analyzed by performing a literature search of relevant scientific journals. For obtaining data from Korea, we used 'Information for Environmental Geology' (IEG), which covers 17 journals in the field of environmental geology. A total of 54 articles related to landslide hazards were found in 5 journals published in the period 2000-2012. The most common topic was landslide prediction or susceptibility (29 articles), followed by landslide mechanisms. For international information, we analyzed 1,851 articles from the 'Web Of Science' published from 2003 to the present. Researchers in Italy have published the greatest number of papers in this field, while papers from Korea rank first in terms of the citation index.

• Journal of Radiation Protection and Research
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• v.19 no.2
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• pp.147-156
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• 1994

On-line gamma monitoring system around KAERI-site was set up to monitor the radiation fluctuations in environment. Data on gamma exposure rates measured by the ionication chamber in the monitoring posts are transmitted to a computer of central control station with. radio telemetry transmission modem and monitored in real time. Radio telemetry transmission system is economical and reliable on handling and storing of data. This monitroing system can triger an early warning system in the event of abnormal radiation levels.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.29A no.11
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• pp.25-39
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• 1992

Due to the data processing development by the computer, the early warning system recently has made a remarkable evolution in its functions and performance as a component of the communication and control system which is also supported by the computer communication and intelligence system. In this paper it is presented that a integrated data processing system is designed to integrate the information sent from the various radar systems which constitute an early warning system. The suggested system model of this paper is devided into two types of structures, the centralized model and the distributed model, according to the data processing algorithm. We apply the queueing theory to analyse the performance of the designed models and the OPNET system kernel to make the analysing program with C language. From the analysis of the queueing components by applying the analysis programs to the designed systems, we got the tendancies and characteristics of both models, that is, a fast data processing performance of the distributed model and a stable data processing capability of the centralized model.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.4
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• pp.759-765
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• 2000

A diagnosis system that provides early warnings regarding machine malfunction is very important for rolling mill so as to avoid great losses resulting from unexpected shutdown of the production line. But it is very difficult to provide early warnings in rolling mill. Because dynamics of rolling mill is non-linear. This paper shows a chaotic behavior of vibration signal in rolling mill using embedding method. Not only phase plane and Poincare map are implemented but also FH and histogram of vibration signal in rolling mill is presented by embedding method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.3
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• pp.670-676
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• 2009

Bankruptcy of firms in Korea can cause distress of financial institutions because these institutions have disterssed bond. Accordingly, social and economical spill-over effects by these results are very big. Even after the difficult times of IMF crisis had ended, bankruptcy of information-based small-medium companies and venture firms listed on the KOSDAQ has been continued. In this context, this study developed and adopted failure prediction models for which discriminant analysis was used. Samples of this study was 81 firms respectively for both failed and non-failed firms listed on the KOSDAQ between the year of 2000 and 2007. The results of this study are as follows. First, the accuracy of classification of the model by years was $74.5%{\sim}76.5%$, and the accuracy of classification of the mean model was $69.6%{\sim}80.4%$. Among the models, the mean model of -one year, -two years, and -three years was highest in accuracy of classification (80.4%). Second, accuracy of prediction of final model adopted on validation samples showed 85% before one year of bankruptcy. The results of this study may be significant in that the results may be used as early warning system for bankruptcy prediction of KOSDAQ firms.