• The KIPS Transactions:PartD
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• v.15D no.3
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• pp.411-420
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• 2008

This paper implemented the u-Healthcare Context Information System (HCIS) supporting ubiquitous healthcare by using location, health and titrating environment information collected from sensors/devices equipped in home for healthcare home service. The HCIS is based on the Distributed Object Group Framework (DOGF), a management model which can customize distributed resources, and manages various context information, applications and devices as a group in healthcare home environment, as one more logical units. Also, this system provides continuous healthcare multimedia service considering a resident's location using Mobile Proxy, and the healthcare context information through Context Provider to a resident in home. For verifying execution of our system, we implemented the seamless multimedia service based on resident's location and the prescription/advice and schedule notification/alarm service as healthcare applications in home. And we showed the executing results of healthcare home service by using service device existed in the residential space on which the resident is located according to the healthcare scenario.

• The KIPS Transactions:PartC
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• v.15C no.6
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• pp.493-506
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• 2008

In this paper we suggest dynamic access control model based on context satisfied with requirement of u-healthcare environment through researching the role based access control model. For the dynamic security domain management, we used a distributed object group framework and context information for dynamic access control used the constructed database. We defined decision rule by knowledge reduction in decision making table, and applied this rule in our model as a rough set theory. We showed the executed results of context based dynamic security service through u-healthcare application which is based on distributed object group framework. As a result, our dynamic access control model provides an appropriate security service according to security domain, more flexible access control in u-healthcare environment.

• Journal of KIISE:Computing Practices and Letters
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• v.13 no.5
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• pp.282-292
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• 2007

In this paper, we propose the active model based on the distributed object group framework which provides adaptive information sharing service to support it to various Healthcare home service. And we applied it to Healthcare home service. This proposed model provides information that collected from physical environment of the home network and sensors for healthcare service according to situation of the user. We uses information of the healthcare information database which was constructed previously, and we uses TMO scheme for to solve each other different periodic qualify. We uses information of the healthcare information database which was constructed previously, and we uses TMO scheme for to solve each other different periodic quality. Specialty, We wrote about interaction of various Healthcare Home services for adaptive information services, and wrote about u-healthcare framework based on DOGF. Finally, we apply active model to healthcare monitoring service, and we showed its result and performance evaluation.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.2
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• pp.187-192
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• 2008

The Intelligent Space(ISpace) provides challenging research fields for surveillance, human-computer interfacing, networked camera conferencing, industrial monitoring or service and training applications. ISpace is the space where many intelligent devices, such as computers and sensors, are distributed. According to the cooperation of many intelligent devices, the environment, it is very important that the system knows the location information to offer the useful services. In order to achieve these goals, we present a method for representing, tracking and human Jollowing by fusing distributed multiple vision systems in ISpace, with application to pedestrian tracking in a crowd. This paper describes appearance based unknown object tracking with the distributed vision system in intelligent space. First, we discuss how object color information is obtained and how the color appearance based model is constructed from this data. Then, we discuss the global color model based on the local color information. The process of learning within global model and the experimental results are also presented.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.3
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• pp.661-669
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• 2004

As a large number of distributed systems becoming more popular, interoperability, portability and security are becoming major concerns of modern computing. CORBA and object-oriented database which provide transparency of network and database are increasingly being used as the basis for distributed system to solve these problems. The two methods can help accomplish assurance of security by using a method-based access control technique or an attribute-based access control technique. These methods also enhance the unavailability or inefficiency caused by the delay of access process and bottleneck of the network due to the complex instance-based access control. We propose a security model on the type information based access control system that can enhance both security and availability by separating the functions delivered from CORBA and object-oriented databases. We apply the access control model specifically to enhancement of security system and also perform a test to verify the security and availability of our model.

• Convergence Security Journal
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• v.3 no.3
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• pp.59-66
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• 2003

In this paper the CORBA security services is designed and implemented conforming to the CORBA Security Services Specification. We implemented a Security Information Management system for object-oriented distributed systems based onthe CORBA (Common Object Request Broker Architecture) Security specification baseed on Repository.

• Journal of the Korean Society of Systems Engineering
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• v.13 no.1
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• pp.1-6
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• 2017

A stores management software which is embedded in the stores management system requires high-level reliability and real-time processing. It also required to implement and verify protocols which requires timing constraints to control various weapons. In this paper, we propose design methodology to design a stores management software and its support middleware based on the TMO (Time-triggered Message-triggered Object) model.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.699-702
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• 2002

분산 객체 컴퓨팅은 인터넷의 활성화와 더불어 각광받고 있는 분야중의 하나이며 많은 응용 소프트웨어들이 분산객체 기술을 이용한 컴포넌트 형태로 개발되고 있다. 분산 객체 컴퓨팅 기술을 기반으로 한 CORBA는 새로운 세대의 분산 컴퓨팅 플랫폼이며, 보안은 항상 분산 컴퓨팅 플랫폼의 기본적인 문제이다. 따라서, CORBA 플랫폼에서의 보안 서비스의 적용은 매우 중요하다. 본 논문에서는 보안의 표준들과 분산 계산 플랫폼의 보안 모델들을 참조하여 CORBA 보안 서비스 규약에 따르는 객체지향 분산환경에서의 객체보안 서비스를 제시한다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.585-587
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• 1998

본 논문은 분산 환경에서 의미상의 클라이언트가 서버에게 서비스를 요청하는 방법인 Java의 RMI, CORBA 등에서 사용하는 원격 호출 방법과 Mobile Agent를 이용하여 서버상으로 직접 이동하여 서비스를 요청하는 방법을 비교하고 분산 시스템상에서의 두 가지 커뮤니케이션 메커니즘 중 상황에 따라 어느것을 사용하는 것이 더 나은 효율을 나타낼 수 있는가를 판단하고 이를 이용하여 구현 패러다임을 결정할 수 있는 메트릭을 제시하는 것을 그 목적으로 한다.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.57.5-57
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• 2001

This paper presents an enhanced web-based distributed system with Single Access Object Protocol(SOAP), which uses HTTP as a communication protocol and XML as a data presentation. The suggested system is applied into a Generic Equipment Model (GEM) for exchanging specified messages(SECS-II), which are encoded into XML presentation, between Equipment and Host via the web sorrel. In this paper, the designed system architecture and its soap components are presented.