• Proceedings of the Korea Multimedia Society Conference
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• 2000.11a
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• pp.295-298
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• 2000

본 논문에서는 Mobile IP상에서 멀티캐스트를 지원하기 위하여 IETF 표준에 제시된 원격가입과 양방향과 터널링 기법의 단점을 보완하는 통합 모델을 제시한다. 제안된 모델의 특징은 이동호스트(MH)가 다른 네트워크로 이동할 경우 외부 에이전트(FA)의 멀티캐스트 그룹가입 여부에 따라서 홈 에이전트(HA)를 통한 양방향 터널링 또는 FA의 멀티캐스트 그룹에 재가입하는 방법을 이용한다. 이에 따라, 패킷의 손실을 최소화하면서 패킷에 대한 최적의 경로를 제공할 수 있도록 상황에 따라 두 방법이 상호보완적으로 동작하게 된다.

• Journal of the Korean Society of Tobacco Science
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• v.25 no.2
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• pp.154-159
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• 2003

Using sucker agents for tobacco can lead some advantages including saving labor, increasing yield and reducing the spread of diseases. At present, the sucker control agents used in China mainly depended on importing. The agents includes two groups, systemics (Maleic hydrazide: MH, etc) and partial systemics (Butralin, Flumetralin, Pendimethalin, etc). Now, Pendimethalin(a.i. 33%, wp) was used extensively all over the tobacco field in China. Sucker control agents will also be used for tobacco production in China. Because of the high price of the imported agents, China has studied on the domestic production of tobacco sucker control agents and has made some progresses.

• Journal of the Korean Statistical Society
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• v.31 no.1
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• pp.45-61
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• 2002

We consider the problem of estimating binomial proportions in the presence of nonignorable nonresponse using the Bayesian selection approach. Inference is sampling based and Markov chain Monte Carlo (MCMC) methods are used to perform the computations. We apply our method to study doctor visits data from the Korean National Family Income and Expenditure Survey (NFIES). The ignorable and nonignorable models are compared to Stasny's method (1991) by measuring the variability from the Metropolis-Hastings (MH) sampler. The results show that both models work very well.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.23 no.9A
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• pp.2230-2239
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• 1998

Recently, mobility support of connectionless mobile ATM data service has been mainly studied in wireless ATM communication network. this paper shows the network model for the mobility support of connectionless data service in ATM network, and proposes the methods to minimize COIP (care of IP address) acquisition processing time for MH(mobile host)migration. Th echaracteristics of proposed methods, COIP acquisition probability and IP data communication sequence of proposed model, are discussed in this paper.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1992.11a
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• pp.41-54
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• 1992

본 논문에서는 정보를 효율적으로 저장, 관리, 전송할 수 있는 기능을 담당하는 분산 디렉토리 시스템（X. 500시리즈）의 모델과 MHS와의 연계 방안을 알아 보고, 이 시스템에서의 인증 방식 중의 하나인 상세 인증（strong authentication）의 문제점과 그 해결 방안을 제시하였다. 또한 X. 509 권고안에서의 디지털 서명을 생성하는 구체적인 방법으로 특정 성질을 갖는 공개키 암호 방식인 RSA를 이용하였으나 본 논문에서는 ElGamal 방식을 분산 디렉토리 시스템에 적용시킴으로써 RSA 방식이 아닌 다른 방식도 X. 509에 적용 가능하다는 것을 보였다.

• Review of KIISC
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• v.4 no.2
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• pp.5-17
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• 1994

전자 우편 시스템은 컴퓨터와 네트워크를 이용하는 이용자들이 가장 빈번히 사용하고 있는 서비스 중의 하나로서 그 이용률은 매년 급증하고 있으며 이와 더불어 교류되는 정보에 대한 보호 및 안전성에 대한 요구도 제기되고 있다. 본 고에서는 이러한 전자 우편 시스템에 보호 서비스를 제공하기 위한 여러 제안된 방식들중에 X.400 MHS과 Internet의 PEM(Privacy Enhanced Mail),미국의 SDNS MSP(Message Secure Protocol)에 관하여 각각의 보호 서비스 제공 방식과 보호 서비스의 유형, 범위, 특성들을 논의하며 이들 접근 방식간의 관련성과 차이점들을 분석하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.27-30
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• 2004

모바일 컴퓨팅 환경은 네트워크가 손상되기 쉬우며, MH(Mobile Host)를 지원하는 MSS(Mobile Support Station)가 안정적이지 못하기 때문에, 이런 상황을 고려하여 시스템 환경을 모델링 한다. 메시지 전송 시 에러가 발생했을 경우 복구 기법으로 체크포인팅 기법과 메시지 로깅 기법을 추가적으로 사용하게 된다. 본 논문에서는 움직임을 기반으로 한 모바일 시스템 환경에서 체크포인트와 함께 메시지 로그를 사용하는 기법의 성능을 비교하고자 한다.

• Journal of the Korean Geosynthetics Society
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• v.11 no.4
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• pp.63-69
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• 2012

Climate change, according to the country to increase locality of slope collapse of heavy disaster, such as increasing the likelihood and prior in order to prevent these disasters, "Slope construction design standards (Ministry of Land, 2011)," is prescribed in the relevant guidelines. In recent years, guidelines Slope Stability Analysis of the existing methods when the rainy season infiltration of rainfall, taking into account have been revised to perform more realistic. In this study, according these trends to the analysis of saturation depth by rainfall intensity and soil conditions. Results as a whole, the larger the saturated hydraulic conductivity and depth of rainfall intensity also showed a tendency to rise in proportion but MH, CL did not occur in the saturation region. Analysis of antecedent rainfall case also reflects an overall increase of depth in the saturated, rainfall in many cases is less than the growth rate was higher in the saturation region.

• Journal of the Korean Electrochemical Society
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• v.3 no.2
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• pp.72-75
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• 2000

For the purpose of developing the non-stoichiometric Zr-based Laves phase alloy with higher capacity and better performance for electrochemical application, extensive work has been carried out in KAIST. After careful alloy design of $ZrMn_2-based$ hydrogen storage alloys through varing their stoichiometry while susbstituting or adding some alloying elements, the $Zr-Ti-(Lh-V-Ni)_{2.2},\;Zr-Ti-(Mn-V-Cr-Ni)_{1.8\pm0.1}$ with high capacity and better performance was developed. Consequently the $Zr-Ti-(Mn-V-Ni)_{2.2}$ alloy has a high discharge capacity of 394mAh/g and shows a high rate capability equaling to that of commercialized $AB_5$ type alloys. On the other hand, in order to develop the hydrogen storage alloy with higher discharge capacity, the hypo-stoichiometric $Zr(Mn-V-Ni)_{2-\alpha}$ alloys substituted by Ti are under developing. As the result of competitive roles of Ti and $stocihiometry({\alpha})$, the discharge capacity of $Zr-Ti-(Mn-V-Cr-Ni)_{l.8\pm0.1}$ alloys is about 400mAh/g(410 mAh/g, which shows the highest level of performance in the Zr-based alloy developed. Our sequential endeavor is improving the shortcoming of Zr-based Laves phase alloy for commercialization, i.e., poor activation property and low rate capability, etc. It is therefore believed that the commercialization of Zr-based Laves phase hydrogen storage alloy for Ni-MH rechargeable battery is in near future.

• Journal of the Korean Institute of Gas
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• v.9 no.4 s.29
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• pp.11-16
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• 2005

In this paper, the hydrogen osmosis test and the mechanical tensile test were carried out to examine hydrogen cracking behavior of STS444 with welding conditions. In $0.5MH_2SO_4+0.001M \;As_2O_3$ solution, the hydrogen embrittlement characteristics of weld zone of STS444 added to load of $1,400 kg/cm^2$ together with hydrogen osmosis by current of $30mA/cm^2$ for 60 min. was considered. As a result of study on the hydrogen embrittlement and mechanical characteristics of STS444외와 with welding conditions the tensile stress and elongation of STS444 get lower by the absorption of oil or water before welding. Also, the reduction rate of tensile stress and elongation of STS444 is larger because of hydrogen embrittlement by the absorption of oil or water. STS444 by the absorption of water before welding is more sensitive to hydrogen embrittlement than oil.