• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.1467-1470
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• 2006

유비쿼터스 환경중 상황에 따라 필요한 행위를 컴퓨터가 수행하여 사용자 각각의 특성에 따라 서비스를 할 수 있는 가장 좋은 것이 헬스케어 분야이다. 기존 헬스케어 시스템은 클라이언트/서버 환경으로 많은 환자들의 생체 신호 데이터가 실시간으로 서버로 전송될 때 서버의 일정 수용 한계를 넘어서게 되어 심한 경우 서버가 다운되는 현상이 발생할 수 있다. 이는 긴급한 환자의 처리에 대처하지 못하는 심각한 상황을 초래 할 수 있다. 또한 생체 신호를 보내는 모바일 디바이스의 자체적으로 지원되는 자원 부족으로 환자와 병원 중앙 서버와의 원활한 커뮤니케이션의 제공을 보장하지 못하는 단점도 있다. 이런 문제점을 해결하기 위하여 본 논문에서는 중간에서 환자와 병원사이의 중간 역할을 하는 써로게이트 시스템과 멀티 에이전트 시스템을 제안한다. 멀티에이전트 시스템은 중앙집중적 부하를 줄이고 유연성 있고 복잡한 처리가 가능하도록 한다. 이는 하나의 에이전트로 해결하지 못하는 복잡한 문제의 해결을 여러 에이전트의 협동을 통해 작업을 수행한다. 이를 위해서 본 논문에서는 JADE 를 기반으로 하는 에이전트 기술을 적용하였다. 모바일 디바이스에 인가되지 않은 접근을 막기 위한 수단으로서, 모든 메시지는 써로게이트를 통해 전달된다. 또한 써로게이트를 통해 로컬 및 원격의 에이전트를 쉽게 다룰 수 있다

• The KIPS Transactions:PartC
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• v.9C no.3
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• pp.367-374
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• 2002

IPsec offers not odd Internet security service such as Internet secure communication and authentication but also the safe key exchange and anti-replay attack mechanism. Recently IPsec is implemented on the various operating systems. But there is no existing tool that checks the servers, which provide IPsec services, work properly and provide their network security services well. In this paper, we design and implement the rule based security evaluation system for IPsec engine. This system operated on Windows and UNX platform. We developed the system using Java and C language.

• Journal of Ocean Engineering and Technology
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• v.19 no.6 s.67
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• pp.86-91
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• 2005

Regarding some of tire important works in tire shipyard, like tire production process, quality control, and material handling, there are many elements that disturb tire work-flaw. For example, there are mistakes in manufacturing, delay of production, and poor quality. These kinds of disturbances are from tire delay of communication time between tire production field and tire management. Therefore, it would be possible to strengthen tire competitiveness of shipbuilding industries by applying tire information technology based on Wireless Local Area Network (Wireless LAN), in order to establish tire multi-possession of real time production information in limited large shipbuilding yard. In this study, tire construction concept of tire information system, based on Wireless LAN, is proposed to build communication infrastructures in shipyards. The various information regarding shipbuilding inspection, process management, and material flaw are analyzed and constructed to databases in tire middle ware system, as tire platform for using Personal Display Agent (PDA). At last, tire middle ware system, which delivers tire information, is developed by tire C$\sharp$ and Microsoft.net; also, tire PDA application system is structured in WinCE O/S, and is tested and evaluated under tire server linked condition.

• Journal of the Korean Ceramic Society
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• v.48 no.6
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• pp.617-620
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• 2011

Thermal shock behavior of porous ceramic nozzles with various pore sizes for continuous casting process of steel was investigated in terms of physical properties and microstucture. Porous nozzle samples with a composition of $Al_2O_3$-$SiO_2$-$ZrO_2$ were fabricatedby adding various sizes of graphite as the pore forming agent. As the graphite size increased from 45~75 to 150~180 ${\mu}m$, both the resulting pore size and the flexural strength also increased. A thermal shock test was carried out at temperatures (${\Delta}$T) of 600, 700, 800, and 900$^{\circ}C$. Microstructure analysis revealed a small number of cracks on the sample with the largest mean pore size of 22.32 ${\mu}m$. In addition, increasing the pore size led to a smaller decrease in both pressure drop and elastic modulus. In conclusion, controlling the pore size can enhance thermal shock behavior.

• Journal of Information Technology and Architecture
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• v.10 no.2
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• pp.197-209
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• 2013

This study analyzes the nature of consumers and smart phones as well as its limitations that domestic mobile communication companies confront. According to the analysis results, emerging technologies such as 5G communication, pervasive computing, augmented reality, and big data seem to have significant effect on the ICT ecosystem in the near future. Based on the results, this study suggests four counterstrategies for domestic mobile communication companies: big data strategy, preparation of things acting as a main communication agent, new service platform development, and 'total life care service provider' strategy.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.93-96
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• 2005

PC 그리드 컴퓨팅(Grid Computing) 환경이란 기존의 클라이언트/서버 구조를 최대한 이용하여 텍스트 정보뿐만 아니라 컴퓨팅 파워, 데이터 저장 장치, 첨단 실험 장비 등 가용한 모든 자원들, 나아가 인력 자원들까지도 인터넷을 통해 공유하는 기술이다. 각 클라이언트는 공동으로 작업하는 프로젝트의 처리 결과를 중심이 되는 서버에 전송한다. 중심 서버에서는 각 클라이언트들의 개별적인 처리 결과를 종합하여 단일 결과를 도출한다. PC 그리드 컴퓨팅 환경하에서 분산된 모든 서비스나 장치들이 상호작용 하기 위해서는 해당 서비스가 제공하는 것이 무엇인지, 또한 자신이 원하는 자원이 어디에 위치해 있는지를 정확히 알아야만 한다. 이런 일련의 작업들을 서비스 디스커버리(Service Discovery)라 한다. 이기종 에이전트 플랫폼 간에 자원의 공유를 위해서 FIPA 에서는 서비스 디스커버리에 대한 명세서를 제안하고 있다. 본 논문에서는 PC 그리드 컴퓨팅 환경에서 이기종 에이전트 플랫폼간에 서비스 디스커버리가 이루어 질 수 있도록 연구 및 개발을 목적으로 한다.

• Journal of the Korea Society for Simulation
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• v.23 no.2
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• pp.25-33
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• 2014

In this study, the border security problem of the ROK Army is examined by applying the agent-based modeling and simulation (ABMS) concept as well as its platform, MANA. Based on the approximately optimized behavior of the infiltrator obtained using genetic algorithm (GA), we evaluate the GOP border security system which consists of human resources, surveillance, as well as command and control (C2) systems. We use four measures of effectiveness (MOEs) to evaluate its performance, and we apply a near optimal latin hypercube (NOLH) design to deal with the large number of factors of interest in our model. By using a NOLH design, our simulation runs are implemented efficiently. We hope the results of this study provide valuable data for deciding the configuration of the border security system structure and the number of soldiers assigned in the platoon.

• Journal of the Korea Society for Simulation
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• v.22 no.2
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• pp.33-40
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• 2013

This paper explores a border security system based on agent-based modeling and simulation (ABMS). The ABMS software platform, map aware non-uniform automata, is used to model various scenarios and evaluate the border security system given a set of infiltrators who have evolutionary behavior governed by genetic algorithm (GA). we formulated an optimization model and approximately solved it using a GA in order to capture near optimal behavior of an infiltrating force. The results presented give two significant insights for our border security system in that optimizing the infiltrator's behavior can make a significant difference and the quantitative results regarding the infiltrator's avoidance of each asset can be viewed as capturing their relative importance.

• The Journal of the Korea Contents Association
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• v.6 no.11
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• pp.285-294
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• 2006

In this paper, we propose a new remote control and monitoring technique using web-service technology for URC robot. URC robot needs the architecture which can be applied all over the variety hardware and software platform for supporting the several interface with external world in the ubiquitous environment. In this paper, web-service technology is preferentially deliberated how to adopt into the embedded environment and the remote control and monitoring technology based on web-service technology for URC robot is designed and implemented as to support the interaction with agent programs. It has been carried out through simulating and implementing this technology into the target robot called NETTORO and proved its practical worth.

• Archives of Pharmacal Research
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• v.24 no.3
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• pp.234-239
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• 2001

Three types of learning and memory tests (Morris water maze, active and passive avoidance) were performed in rats following intracerebroventricular infusion of ethylcholine aziridium (AF64A). In Morris water maze, AF64A-treated rats showed the delayed latencies to find the platform iron 6th day after the infusion. In pretrained rats, AF64A caused the significant delay of latency at 7th days but not 8th day. In the active avoidance for the pretrained rats, the escape latency was significantly delayed in AF64A-treatment. The percentages of avoidance in AF64A-treated rats were less increased than those in the control. Especially, the percentage of no response in the AF64A-treated rats was markedly increased in the first half trials. In the passive avoidance, AF64A-treated rats shortened the latency 1.5 h after the electronic shock, but not 24 h. AF64A also caused the pretrained rats to shorten the latency 7th day after the infusion, but not 8th day. These results indicate that AF64A might impair the learning and memory. However, these results indicate that the disturbed memory by AF64A might rapidly recover after the first retrain. Furthermore, these results suggest that AF64A may be a useful agent for the animal model of learning for Spatial cognition .