• Journal of the Institute of Electronics Engineers of Korea TC
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• v.46 no.9
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• pp.39-45
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• 2009

When Mobile IPv6 is deployed in commercial network, a mobile node needs AAA services for an authentication, authorization and accounting. AAA and Mobile IPv6 are protocols which are operated independently. Then schemes which merge these protocols have been emerged. These schemes can enable a mobile node to establish a security association between the mobile node and a home agent and to perform a binding update for the home agent using AAA authentication request. But these schemes introduce many signal messages and long handover latency during the handover, since Route Optimization mode for Mobile Ipv6 is performed using Return Routability procedure. To solve this problem, we propose a scheme for Route Optimization mode that the home agent performs the binding update for a correspondent node via the AAA infrastructure between the home agent and the correspondent node instead of Return Routability procedure. For performance evaluation, we analyze signal message transmission costs and handover latencies during handover. We show performance improvement of the proposed scheme which reduces handover latency as 61% compared with the existing scheme.

• Journal of the Korean Home Economics Association
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• v.25 no.3
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• pp.1-13
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• 1987

In this study, I have tested the effects of the agents and dyeing conditions on the Brazil-wood dyestuff as one plant dyestuffs. According to the tests, I have fount that color differenciation depending opon the agents and procedual condtitions. As the agents, Alm induced redness and light yellowness by Aluminum Acetate, dark greenness or blueness by Ferrous chloride, dark redness by Stannous Chloride, dark grenness or blueness by Copperous Chloride, light yellowness or greenness by Calcium Dihydroxide. On the other hand, color-fastness differed from various mordant agents. The color-fastnes was solid using multiple agents than sole agent.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.334-336
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• 2004

If Network에서 mobility의 보장은 효과적인 network 동작을 위해 중요하다. Mobile IP와 SIP를 사용할 경우 MH가 위치변경 시 마다 MH로부터 먼 곳에 위치할 가능성이 있는 MH의 Home network내 Home Agent나 Redirect Server에 registration을 수행해야 하는데 이 경우 이전 subnet에서 새로운 subnet으로의 registration이 완료되기 전까지는 correspondent node에 대한 연결성을 잃어 버리게 되어 이로 인해 발생되는 Packet 손실과 delay 생기게 된다. 이런 Registration Problem을 효과적으로 해결하기 위해 Presence System을 이용한 효율적인 network architecture를 제안한다.

• Journal of the Korea Society of Computer and Information
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• v.12 no.2 s.46
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• pp.243-249
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• 2007

As today's home-network market grows related researches had been increased and with different interfaces of these products of course there is lack of compatibility between these systems. So we need some extensionable managing system which integrates and manages these systems. In this paper, we designed framework that integrates and manages network system and also implemented Home Gateway using JMX on Sensor-network environment. It may manage each target with modulization and through the connection interface we make allowance compatibility and extensionability between existing systems. Through this researches, we implemented the Home-network integrated managing system which can manage and monitor with PDA or RDP(remote desktop PC).

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.787-790
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• 2005

User authentication is an essential component for secure home network service. It enables authorized persons to use the home network. Using of various authentication methods provides user convenience. To add to this, using of home gateway included of authentication server function enables that once users are authenticated in the home gateway, the users user all authorized home network service. It is possible by authentication agent of home gateway. This paper describes user authentication mechanism using authentication server.

• Journal of Periodontal and Implant Science
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• v.24 no.2
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• pp.433-440
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• 1994

The purpose of this investigation was to study the efficacy and safety of 6% hydrogen peroxide gel as a daily home tooth bleaching gel. The subjects consisted of 20 male dental students representing a variety of acquired stain and each subject participated for a 4-week period. Tooth color analysis(Shade determination), sulcus bleeding index, probing depth and probing attachment level were done and recorded at baseline and at the end of each week of study. The results indicated that home bleaching gel containing 6% hydrogen peroxide was effective and caused no gingival inflammation. Sulcus bleeding index, probing depth and probing attachment level showed no change. In conclusion, 6% hydrogen peroxide gel is an effective and safe agent for daily home tooth bleaching.

• Journal of the Korean Home Economics Association
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• v.35 no.2
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• pp.137-145
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• 1997

The effect of accumulated residual soils in wear and wash tests on yellowing of white dress shirt was studied. The test samples after repeated home laundry at 20 households for six months were measured residual soils, $\Delta$b*.As well as, correlation between residual soils and yellowing was also examined. As a result, residual soils increased with number of wear and wash cycles, a little decreased in using with enzyme detergent. The b* value of test samples with fluorescent whitening agent were distributed -12.850~0.291. Correlation coefficient between sebum soils, protein soils and $\Delta$b* was 0.98, 0.58. Ultimately, residual sebum soils have more higher correlation than residual protein soils. Hence, residual sebum soils have more effect on yellowing than residual protein soils. therefore, effective a device as improvement of laundry condition and textile development needs for decrease of sebum soils.

• The KIPS Transactions:PartA
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• v.13A no.4 s.101
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• pp.351-362
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• 2006

This paper proposes an adaptive inter-agent communication protocol to considerably reduce the amount of agent location information maintained by each service node and the message delivery time while avoiding the dependency of the home node of a mobile agent. To satisfy this goal, the protocol enables each mobile agent to autonomously leave its location information only on some few of its visiting nodes. Also, it may significantly reduce the agent cache updating frequency of each service node by keeping the identifier of the location manager of each agent in the smart agent location cache of the node. Simulation results show that the proposed protocol reduces about $76%{\sim}80%$ of message delivery overhead and about $76%{\sim}79%$ of the amount of agent location information each service node should maintain compared with the traditional one.

• Journal of Korean Home Economics Education Association
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• v.33 no.2
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• pp.27-44
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• 2021

This study is to identify the concept of action from the critical science perspective and to explore the agency of home economics teachers for the purpose of teacher education. The context and various characteristics of home economics teacher' agency were identified in terms of philosophy and teacher education. The results of the study indicates, first, the concept of action refers to an activity of individuals involving one's own intentions, and include the ability to reveal a unique identity that aims to reach a set purpose and decision, and this can be identified by mutual meaning in the public sphere. Second, teacher agency is influenced by a teacher's professional experiences and cultural and structural aspects, and it can create an environment which can promote self-directed and cooperative relationships among individuals and communities. Therefore, home economics teachers should be able to reasonably judge, contemplate, and act through reflections on the circumstances and consequences in which their agency is exercised. Third, home economics teachers can reflect and think critically about the values, roles, and sense of purpose of home economics education based on agency. Teachers should focus on the process of achieving their agency rather than on completing it, and they can continuously develop it through a perceived shared understanding among teachers. Therefore, the conceptualization of the agency of home economics teachers is to understand the practice revealed in a teacher's actions. This requires environmental support in school settings because it acts as a mechanism for strengthening the thinking and reflection of teachers through the creation of interactive environments in which professional knowledge and experiences can be shared.

• The Transactions of the Korea Information Processing Society
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• v.7 no.11
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• pp.3490-3499
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• 2000

There are two approaches, HA(Home Agent)-based and FA(Froegn Agent)-based mulicasting in mobile computing environments based on mobile IP. If we consider efficiency of routing and bandwidth the FA-based model is better than the HA-based model. But in the case of a MH(Mobile Host) moves frequently it shows bad connection durability because of join and graph delays. To overcome this and to support effective mobile multicasting we propose an extended FA-based multicast routing. In our model previous FA for wards multicast packets to MH. while new FA processes a jion request from MH. That is in general case our model supports FA-based multicasting for efficiency but it provides unicast-based mulicasting for connection durability when MH moves to new FN(Roreign Network). To evaluate our model, we analyze connecction durability, bandwidth, overheads and routing sosts in many situations and compare with previous works.