• Asia pacific journal of information systems
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• 제14권3호
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• pp.121-144
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• 2004

Developing a personalized system on a user's behalf which is working around the Internet-based marketplace is one of the challenging issues in intelligent e-business, especially mobile commenrce. It has been highly recommended that such a mobile personalized system has to perceive the user's needs a priori by tracking user's current context such as location with activity and then to identify the current needs dynamically and proactively. Automatically and unobtrusively getting user's context is an inevitable feature for the development of autonomous mobile commenrce. However, personalization methodologies and their feasible architectures for context-aware mobile commerce have been so far very rare. Hence, this paper aims to propose a context-aware mobile commerce development methodology by applying agent and semantic web technologies for personalized reminder system, which is one of the mobile commerce support system. We revisited associationism to understand a buyer's need identification process and adopt the process as 'purchase based on association' to implement a personalized reminder system. Based on this approach, we have showed how the agent-based semantic web service system can be used to realize need-aware reminder system. NAMA(Need-Aware Multi-Agent), a prototype system, has been implemented to show the feasibility of the methodology and framework under mobile setting proposed in this paper. NAMA embeds bluetooth-based location tracking module and identify what a user is currently looking at through her/his mobile device such as PDA. Based on these capabilities, NAMA considers the context, user profile with preferences, and information about currently available services, to aware user's current needs and then link her/him to a set of services, which are implemented as web services.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권1호
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• pp.83-104
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• 2011

Mobile grid is a combination of grid computing and mobile computing to build grid systems in a wireless mobile environment. The development of network technology is assisting in realizing mobile grid. Mobile grid based on established grid infrastructures needs effective resource management and reliable job scheduling because mobile grid utilizes not only static grid resources but also dynamic grid resources with mobility. However, mobile devices are considered as unavailable resources in traditional grids. Mobile resources should be integrated into existing grid sites. Therefore, this paper presents a mobile grid middleware interconnecting existing grid infrastructures with mobile resources and a mobile service agent installed on the mobile resources. This paper also proposes a mobile resource reliability-based job scheduling model in order to overcome the unreliability of wireless mobile devices and guarantee stable and reliable job processing. In the proposed job scheduling model, the mobile service agent calculates the mobile resource reliability of each resource by using diverse reliability metrics and predicts it. The mobile grid middleware allocated jobs to mobile resources by predicted mobile resource reliability. We implemented a simulation model that simplifies various functions of the proposed job scheduling model by using the DEVS (Discrete Event System Specification) which is the formalism for modeling and analyzing a general system. We also conducted diverse experiments for performance evaluation. Experimental results demonstrate that the proposed model can assist in improving the performance of mobile grid in comparison with existing job scheduling models.

• 한국컴퓨터정보학회논문지
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• 제8권4호
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• pp.132-137
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• 2003

인터넷 기술과 웹 기반 응용 프로그램의 발전으로 광역 분산처리에 대한 요구가 기하급수적으로 증대되고 있다. 이러한 광역 분산처리 환경의 요구사항에 적용할 수 있는 모델로 모바일 에이전트를 들 수 있다. 그러나 현재의 모바일 에이전트 모델은 여러 가지 기술적 제약점들을 가지고 있다. 모바일 에이전트가 광역 분산 처리 환경에서 사용되기 위하여 필요한. 모바일 에이전트 시스템의 구조와 사용되는 프로그래밍 패러다임과 사용 기술 등에 있어서의 문제점들을 분석하였다.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2001년도 International Conference CALS/EC KOREA
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• pp.369-378
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• 2001

Recently, according to the rapid development of Internet and IT, many applications and technologies related to Internet and IT have been studied and developed. The agent technology, which was an essential topic in early AI, is being researched with the combination of the recent network technologies. Mobile agent especially takes high interest of many researchers because of its mobility with which it can move around the internet and complete its goal. This paper presents a virtual market system using mobile agent, in which the transaction agents can do their transaction about some product with each other instead of real buyer and seller. The presented virtual market system consists of market agent, customer agent and database agent to provide the virtual market places for the effective completion of transactions.

• 한국컴퓨터정보학회논문지
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• 제9권1호
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• pp.55-62
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• 2004

컴퓨터네트워크의 확대와 인터넷 이용자의 증가에 따른 부작용으로 컴퓨터 보안 문제가 중요하게 대두되고 있다. 따라서 침입자들로부터 위험을 줄이기 위한 침입 탐지 시스템에 관한 연구가 활발하다. 이동에이전트를 이용하는 제안된 컴퓨팅 패러다임의 잇점은 네트워크의 지연시간 극복. 네트워크 부하 감소, 비동기적이고 자율적인 실행, 동적인 적합성과 이기종 환경에서의 운영이다. 많은 정보 보호 모델들은 agent-to-agent, agent-to-platform, 그리고 platform-to-agent 위험한 요소들을 완화하기 위하여 제안되었다. 본 논문에서는 침입 탐지 시스템의 개발을 통해서 이동 에이전트의 성능을 분석하여 관리함으로써 데이터가 최상의 환경을 유지하도록 하였다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제4권1호
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• pp.29-33
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• 2004

I propose a personalized digital library system (PDLS) based on an advanced distributed agent platform. The new platform is developed by improving the DECAF (Distributed Environment-Centered Agent Framework) which is one of the conventional distributed agent development toolkits. Also, a mobile ORB (Object Request Broker), Voyager, and a new multi agent negotiation algorithm are adopted to develop the advanced platform. The new platform is for mobile multi agents as well as the distributed environment, whereas the DECAF is for the distributed and non-mobile environment. From the results of the simulation the searched time of PDLS is lower, as the numbers of servers and agents are increased. And the user satisfaction is four times greater than the conventional client-server model. Therefore, the new platform has some optimality and higher performance in the distributed mobile environment.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2001년도 가을 학술발표논문집 Vol.28 No.2 (2)
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• pp.10-12
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• 2001

우리들은 현재 엄청난 양과 질의 정보세상에서 생활하고 있다. 때문에 이들 정보들을 보다 효과적으로 활용하고자 하는 것은 당연한 욕심이다. 그 중 대표적인 예로 RPC(Remote Procedure Call)가 있다. 그리고 mobile code를 이용해 새로운 패러다임을 선보이는 Mobile Agent가 있다. 현재 여러 mobile agent 시스템이 Java RMI(Remote Method Call)를 활용하고 있다. 이전의 RPC는 하나의 완전한 객체가 아닌 일반 data만을 네트웍을 통해서 전송할 수 있었으나, Java RMI를 적극 활용하는 mobile agent는 자신이 하나의 객체로 구현되어 네트웍을 통해 목적지 서버로 혹은 다른 호스트로 이동한 후 원격지에서 직접적으로 자기 내부의 메소드를 실행할 수 있다[1,2,3,4]. 이는 사용자의 간섭을 배제한 agent의 자율적이고 독립된 행동을 지원하기 때문에 분산처리분야에서 새로운 패러다임을 제시하고 있다. 그리고 agent가 적합한 서비스를 제공하는 서버를 효율적이고 정확하게 찾는 것이 무엇보다 중요하다. middle agent가 바로 이런 기능을 가진 모듈이다. 본 논문에서는 효율적인 모빌 에이전트 시스템을 구축하기 위해 서버와 클라이언트와의 상호 연결을 담당하는 새로운 middle agent로서 MiddleMan을 제안하였으며 이것을 이용한 다중 사용방법에 대해서 연구하였다[5].

• 한국정보통신학회논문지
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• 제11권10호
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• pp.1873-1879
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• 2007

P2P 서비스를 이용하는 이동 단말의 증가 및 응용 분야 확산에 따라 이동 에이전트 기술이 P2P에 적용되어 다양한 분야에 혁신적인 서비스를 제공하고 있다. 그러나 이동 에이전트의 자유로운 이동성은 웜과 유사하게 동작하기 때문에 악의적인 공격자의 공격에 따라 빠르게 오염되는 문제가 제기되었지만 현재로서는 근본적인 해결책이 전무한 상황이다. 본 논문에서는 구조적 인 P2P 환경에서 이동 에이전트의 안전성 검증을 제공하는 STAS(Security Tracking and Auditing Server) 시스템을 제안하였다. 이동 에이전트는 피어를 경유한 후 STAS에게 결과값을 전송함으로 보안감사 및 무결성을 검증받고, 이동 에이전트 생성자는 STAS로부터 최종 결과값을 획득한다. 이러한 방법을 통해서 이동 에이전트의 안전성 검증과 그 수행에 따라 발생할 이동 단말의 부하를 최소화할 수 있다.

• 경영과학
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• 제21권3호
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• pp.23-38
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• 2004

Recently the usage of mobile devices which enable the accessibility to Internet has been dramatically increased. Most of the mobile services, however, so far tend to be simple such as infotainment service. In order to fully taking advantage of wireless network and corresponding technology, personalized web service based on user's context could be needed. Meanwhile, optimization techniques have been vitally incorporated for optimizing the development and administration of electronic commerce. However, applying context-aware optimization mechanism to personalized mobile services is still very few. Hence, the purpose of this paper is to propose a methodology to incorporate optimization techniques into personalization services. Multi agent-based web service approach is considered to realize the methodology. To show the feasibility of the methodology proposed in this paper, a prototype system, CAMA-myOPt(Context-Aware Multi-Agent system for my Optimization), was implemented and adopted in mobile comparative shopping.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 ITC-CSCC -1
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• pp.549-552
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• 2000

We address an access control in the mobile agent-based workflow system. The Role Based Access Control (RBAC) is suitable to model the access control for business processes. However, current RBAC models are not adequate to mobile agent-based workflow system. Because separation of duties becomes complicated and it is impossible to perform several workflows at the same time. To solve these problems, we limit the scope of privilege within the specified task. We define considerations, specification of constraints needed in RBAC when tasks are involved. Also, we present an access control scenario and algorithms in the mobile agent-based workflow system.