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국내 KBS-3 방식 고준위방사성폐기물 심층처분시설 방사선학적 안전성 평가대상 방사성핵종 목록 선정개념(안) 제언
김석훈,이동현,박동극 (사)한국방사선산업학회 2023 방사선산업학회지 Vol.17 No.1
T he transport calculation for a wide variety of radionuclides contained in high-levelradioactive waste, especially spent nuclear fuel, is computationally difficult, and input data collection forthis also take a considerable amount of time. Accordingly, considering limited resources, it is possibleto reduce the calculation time while minimizing impact on accuracy by including only radionuclidesimportant to calculation result through applying some criteria among potential radiation source termsthat may release into environment. In this paper, therefore, we reviewed and analyzed the screeningprocess performed to select radionuclides to be considered in the safety assessment for the KBS-3 typerepository in Sweden and Finland. In both countries, it was confirmed that a list of radionuclides wasselected by comprehensively considering screening criteria such as radioactivity inventory, half-life,radiotoxicity, risk quotient, and transport properties, and etc. A comparison of radionuclides includedin the radiological safety assessment in both countries suggests that most of nuclides are consideredin common, and a few nuclides considered only in one country are due to differences in decay chaintreatment or spent fuel types. As of now, since most of information on the disposal facility in Korea hasnot been determined, it is necessary to comprehensively model release and transport of all radionuclidesconsidered in Sweden and Finland when performing the radiological safety assessment. Based on theseresults, we derived the screening concept of selecting a list of radionuclides to be considered in theradiological safety assessment for the domestic KBS-3 type geological disposal facility, and this resultis expected to be used as technical basis for confirming conformity with the safety objective. In a moredetailed evaluation reflecting domestic characteristics in the future, it would be desirable to consider onlyradionuclides selected in accordance with the screening procedure. However, further research should beconducted to determine the quantitative limit for each criteria.
Referring Expressions in English News Sections
김석훈 새한영어영문학회 2019 새한영어영문학 Vol.61 No.2
This study investigates referring expressions in different news sections of contemporary English online news articles and gives a pragmatic account for their grammatical deployment. It covers referring expressions referred to in five news sections: politics, business, science, arts and entertainment, and sports. It focuses on accessibility hierarchy of coreference referring to public figures in different news sections by pragmatic factors: mention order, paragraph order, distance between coreference, and their distributional properties. This corpus-based analysis confirms that full name, the least accessible, is most preferred for the first mention/paragraph; for the subsequent reference, pronoun is most preferred when it is retrieved in the most accessible position, while surname is most preferred when it is retrieved in a relatively less accessible position, following accessibility marking scale. It is implied that the use of referring expressions for public figures in English news sections is linguistic, text-dependent, and news section-independent rather than extralinguistic, context-dependent, and news section-dependent.
All-IP 네트워크에서 CDMA트래픽 측정기술을 이용한 고급 QoS 제공 기법에 관한 연구
김석훈,유인태,Kim Seok-Hoon,Ryoo In-Tae 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.1B
본 논문에서는 정확한 트래픽 측정을 기반으로 하여 멀티미디어 Application에 대한 QoS를 제공할 수 있는 향상된 QoS 보장 Scheme (AQPS : Advanced QoS Provisioning Scheme)을 제안하고 이를 검증하였다. 먼저, 본 논문에서는 1xEV-DV 시스템을 기반으로 하여 해당 시스템의 QoS 요구사항을 추출하고 CDMA 트래픽 측정기술을 사용하여 이에 맞는 QoS 제공 방법을 도출하였으며, 제안한 AQPS가 기존의 1xEV-DV 네트워크 보다 네트워크 관리의 효율성이나 성능 측면에서 향상되었음을 컴퓨터 시뮬레이션을 통해 확인하였다. In this paper, we propose an advanced QoS provisioning scheme (AQPS) that can provide satisfied QoS for multimedia applicatios based on accurate traffic measurements. We first consider the 1xEV-DV system as a target system, extract QoS requirements or the system, and then develop a corresponding QoS provisioning method using CDMA traffic measurement. The AQPS has been verified to outperform the existing system used in the current 1xEV-DV network and to efficiently manage network resources by computer simulations.
침입탐지 시스템 관리를 위한 침입경보 축약기법 적용에 관한 연구
김석훈,정진영,송정길 한국융합보안학회 2005 융합보안 논문지 Vol.5 No.4
네트워크 시스템에 대한 악의적인 접근과 정보위협이 증가하고, 그 피해또한 기업에서 개인 사용자까지 확대되고 있다. 침입탐지 시스템, 침입차단 시스템 등 단위 보안 기능만을 제공하는 제품은 분산화, 지능화 되어가고 있는 복합적인 침입에 대한 대응에 한계가 있다. 여러 보안 제품을 연동하여 해커의 침입탐지, 대응 및 역 추적을 위한 통합 보안 관리의 필요성이 대두되고 있다. 그러나 통합보안 관리의 특성상 다양한 보안 제품에서 전송된 이벤트와 침입경보의 양이 많아 분석이 어려워 서버측의 부담이 되고 있다. 따라서 본 논문에서는 이러한 문제점을 해결하고자 침입경보 데이터를 축약하는 방법에 대하여 연구하고자 한다. Today the malicious approach and information threat against a network system increase and, the demage about this spread to persnal user from company. The product which provides only unit security function like an infiltration detection system and an infiltration interception system reached the limits about the composition infiltration which is being turn out dispersion anger and intelligence anger. Necessity of integrated security civil official is raising its head using various security product about infiltration detection, confrontation and reverse tracking of hacker. Because of the quantity to be many analysis of the event which is transmitted from the various security product and infiltration alarm, analysis is difficult. So server is becoming the charge of their side. Consequently the dissertation will research the method to axis infiltration alarm data to solve like this problem.
A Pragmatic Study of English Sentential Anaphors that and it
김석훈,정혜진 새한영어영문학회 2014 새한영어영문학 Vol.56 No.4
The purpose of this paper is to verify the referential properties of English sentential anaphors that and it in pragmatics by a quantitative survey that focuses on the anaphoric selection in a given discourse. Sentential anaphors that and it are pragmatically differentiated by the two main referential properties: the givenness (new vs. old) of information and the width (narrow vs. wide) of reference, with the concept of focus. These pragmatic referential properties are verified by English language users in an experimental survey, in which we can confirm that there is a statistically significant interaction between both sentential anaphoric forms and the corresponding contexts in affecting language users’ degree of acceptability, and that the nature of native language has a statistically significant effect on the subjects’ degree of acceptability for both sentential anaphors.