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Shon, Jong Sik,Kim, Gi Yong,Im, Junhyuck Elsevier 2019 Annals of nuclear energy Vol.124 No.-
<P><B>Abstract</B></P> <P>The Korea Atomic Energy Research Institute (KAERI) is planning the construction of the KIJANG Research Reactor (KJRR), which is currently undergoing licensing procedures. The fission <SUP>99</SUP>Mo production process (FMPP) of the KJRR generates intermediate-level liquid waste (ILLW) and alumina residue (Al<SUB>2</SUB>O<SUB>3</SUB> cake), which is a solid waste. In the present study, an efficient method of reducing the amount of generated cement waste form by mixing the ILLW and Al<SUB>2</SUB>O<SUB>3</SUB> cake together, into low-level waste, was developed. The purpose of this study was to determine if the cement waste form produced by mixing cement with the waste from the FMPP would satisfy the acceptance criteria of a low- and intermediate-level waste disposal facility in Korea. The process operating range and the optimum operating conditions were found by investigating the mixability of the cement waste form, by considering the presence of free standing water after curing, and by performing a water immersion test depending on the mixing ratios of Portland cement (type I), ILLW, and Al<SUB>2</SUB>O<SUB>3</SUB> cake. The feasibility of treating the cement waste form produced under the optimum operating conditions was evaluated in relation to the acceptance criteria of a low- and intermediate-level waste disposal facility in Korea. The results showed that the cement waste form satisfied the acceptance criteria with regard to structural stability (compressive strength test, thermal cycling test, water immersion test, and irradiation test) and leachability (leaching test).</P>
A Secure and Robust Connectivity Architecture for Smart Devices and Applications
Shon, Taeshik,Han, Kyusuk,Park, James J. (Jong hyuk),Jeong, Young-Sik,Lee, Yang Sun Hindawi Publishing Corporation 2011 EURASIP journal on wireless communications and net Vol.2011 No.-
<P>Convergence environments and technologies are urgently coming close to our life with various wireless communications and smart devices in order to provide many benefits such as connectivity, usability, mobility, portability, and flexibility as well as lower installation and maintenance costs. Convergence has brought important change not only in the way we live but also in the way we think. It is the progress towards the attempt to create and to evolve new valuable services through the device convergence and fusion of in-home, office, and various environments around the personal mobile apparatus. Based on the dynamic trends of convergence, it is widely argued that the increased requirements on secure and robust connectivity between a variety of mobile devices and their applications provide us the era of real pervasive computing environment. Thus, in this paper, we present a novel connectivity architecture using RF4CE-(Radio Frequency for Consumer Electronics-) based wireless zero-configuration and enhanced key agreement approach. We analyze the security and performance of our proposed approach by the development of the prototype H/W and the construction of a testbed with CE and mobile devices.</P>
장종성 ( Jong Sung Jang ),정광식 ( Kwang Sik Chung ),손진곤 ( Jin Gon Shon ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
다중서명에서는 보안적 요소뿐만 아니라 다중서명의 길이, 다중서명의 생성 및 검증 시간, 복호화 시간, 통신량 등도 중요한 요소이다. 기존의 RSA를 그대로 이용한 RSA 원형 다중서명 방식과 RSA를 변형하여 적용한 RSA 변형 다중서명 방식은 다중서명의 생성 및 검증 시간이 각각의 개인서명을 생성하고 검증하는 시간의 합과 비례하여 증가한다는 문제점이 있다. 본 논문은 서명자의 수만큼 분할된 각각의 부분메시지에 대해 RSA 방식을 이용하여 제각기 서명하는 다중서명 방식을 제안한다. 제안된 메시지 분할을 이용한 RSA 다중서명 방식은 블록의 수가 증가하지 않는 경우 기존 방식에 비해 다중 서명의 길이가 증가하지 않으면서, 다중서명의 생성 및 검증 시간이 각각 □로 감소하고, 복호화 시간과 통신량은 각각 약 □~ □로 감소한다.