• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.703-706
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• 2001

This paper presents a component-based integration framework and its software component architecture for supporting the rapid integration of legacy design supporting systems in the distributed environment. Also, using standard interface, this software component architecture provides flexibility, extensibility and compatibility which ensure software components to be independent of the integration middleware and systems to be integrated.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.10 no.2
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• pp.81-88
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• 2006

The advent of supercomputers contribute greatly in overcoming scientific and academic problems that were previously difficult to solve. However, the supercomputer itself suffers from the problem of being considerable cost. In response, the concept of grid computing, to use the resources of distribute computers connected with each other, was created. This system uses connection oriented protocols to integrate and manage the resources of different types of distributed systems, yet it has the problem of compatibility between protocols of other types. In this paper, a system to manage grid network performance through XML-based SOAP web service which is platform-independent, is proposed.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.63-66
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• 2005

최근 환자중심의 진료환경 구축을 통한 진료의 질적인 향상을 위해 바이오 및 임상정보 통합의 필요성이 점차 커지고 있다. 따라서 기존의 폐쇄적인 의료시스템들을 개방적인 시스템으로 전환하고 각 시스템간에 정보를 교환하고 공유하기 위해 HL7 등의 표준들이 급속히 확산되고 있다. 그러나 HL7 은 임상문서 교환을 위한 유연성있는 표준이지만 시스템에 의존적인 형태의 메시지는 이질적인 시스템간의 정보교환에는 부적합하다. 따라서 HL7 표준중 XML 기반의 임상기록 저장 구조인 CDA 를 이용하여 환자의 임상정보가 통일되고 통합될 필요성이 있으며 본 논문은 새로운 CDA 를 지원하기 위해 바이오 및 임상정보를 통합하고 통합된 정보를 통합저장소에 저장하는 기능과 시스템 간 자료전송 그리고 외부의 응용프로그램을 통한 통합저장소의 접근제어 기능을 수행하는 미들 웨어를 설계한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.2
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• pp.83-91
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• 2007

The purpose of this paper is developing a PML server which is capable of saving and managing effectively the information of vehicles using RFID technology in the logistical and distributive environment. The PML server logs and manages the real-time static and dynamic information about the vehicles in EPC code format which is represented by XML schema and transmitted by the RFID reader to the server. It receives information from SAVANT the RFID middleware and transmits the data to the traffic information management application The main system we developed consists of the EPC data registry, query processor, data converter, vehicle product and instance data storage, system management tool and application API parts.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.115-118
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• 2010

최근 RFID (Radio Frequency Identification)기술은 다양한 분야에서 관심을 받고 사용되고 있으며 RFID 리더의 종류도 매우 다양하다. 이러한 RFID 리더들을 지원하기 위해 RFID 미들웨어는 리더에서 지속적으로 발생하는 데이터를 수집, 제어, 관리하는 기능을 가지고 있으며 다양한 형태의 RFID 리더 인터페이스를 지원하여 이기종 RFID 리더와의 연동을 용이하게 한다. 현재 표준 규약에 따른 RFID 미들웨어들이 개발되고 있으며 RFID 표준 단체인 EPCglobal에서는 EPC (Electronic Product Code) 처리 시스템에서 RFID 태그를 인식한 리더가 애플리케이션 계층으로 데이터를 전달하는 역할을 하는 ALE (Application Level Events)라는 RFID 미들웨어를 제시하였다. 그러나 표준을 따르는 RFID 미들웨어는 그 자체가 복잡하고 부피가 크며 가격이 높기 때문에 이를 기반으로 한 시스템은 개발 속도가 늦어지고, 유지보수가 힘들어진다. 따라서 한 기업 내에서 사용되는 애플리케이션의 크기가 소규모 또는 중규모인 경우를 위해 보다 가벼운 RFID 미들웨어가 필요하다. 본 논문에서는 다양한 RFID 리더를 처리하기 위한 리더 매니저와 애플리케이션의 목적에 맞는 이벤트를 생성하는 쿼리 매니저를 가진 경량의 RFID 미들웨어를 개발하고자 한다. 리더 매니저는 RFID 리더를 관리하기 위한 추상 어댑터를 제공하고 리더 구성 XML 파일을 이용하여 RFID 리더를 관리한다. 쿼리 매니저는 질의 조건을 주기적으로 체크하는 스케줄러를 통해 RFID 이벤트를 관리한다. 본 경량적 RFID 미들웨어는 하드웨어의 투명성을 지원하며, 유지보수가 용이하고 유연성과 확장성을 제공하는 RFID 애플리케이션을 개발할 수 있도록 해준다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10d
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• pp.518-523
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• 2006

최근에 홈네트워크 분야에서 각 서비스의 특징에 따라 UPnP, HAVi, Jini등과 같은 다양한 홈네트워크 미들웨어들이 생겨나게 되었고 이들을 통합하기 위한 연구가 진행되고 있다. 대부분의 홈네트워크 미들웨어를 통합하려고 하는 연구들은 시스템을 구축에 대한 비용이 부담된다는 것과 시스템 구축 후에 새로운 홈네트워크 미들웨어가 추가될 때 이미 구축되어 있는 시스템과의 호환이 너무 어렵다는 두 가지 문제점이 있다. 이러한 문제점들을 해결하기 위해 XML을 이용한 VHG 기반 메타컴퓨팅 미들웨어[7]를 설계했었다. 이를 XBI-Middleware라고 한다. 본 논문에서는 이 미들웨어를 바탕으로 한 환경에서 사용자가 UVAML (User-centric Virtual Appliance Markup Language)을 이용하여 간단한 사나리오 작성을 하게 한다. 이로 인해 가정 내 존재하는 가전기기들 사이의 연관성 있는 동작을 가능케 하는 사용자 중심의 가상 가전기기를 개발한다. 이를 UVA (User-centric Virtual Appliance)라고 한다. 이와 더불어 시나리오 상에 포함된 가전기기가 특정 이유로 홈네트워크에서 이탈할 경우에 나타나는 잘못된 시나리오 동작과 불필요한 시나리오 정보 저장으로 인한 스토리지 낭비와 같은 문제점들을 해결하고 그 가전기기가 다시 홈네트워크로 들어오게 되었을 경우 다시 그 시나리오의 동작을 가능케 하기 위한 시나리오 복구 방안을 제안한다.

• Journal of Internet Computing and Services
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• v.15 no.1
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• pp.29-43
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• 2014

The development of NGS technologies, such as scientific workflows, has reduced the time required for decoding DNA sequences. Although the automated technologies change the genome sequence analysis environment, limited computing resources still pose problems for the analysis. Most scientific workflow systems are pre-built platforms and are highly complex because a lot of the functions are implemented into one system platform. It is also difficult to apply components of pre-built systems to a new system in the cloud environment. Cloud computing technologies can be applied to the systems to reduce analysis time and enable simultaneous analysis of massive DNA sequence data. Web service techniques are also introduced for improving the interoperability between DNA sequence analysis systems. The workflow-based middleware, which supports Web services, DBMS, and cloud computing, is proposed in this paper for expecting to reduceanalysis time and aiding lightweight virtual instances. It uses DBMS for managing the pipeline status and supporting the creation of lightweight virtual instances in the cloud environment. Also, the RESTful Web services with simple URI and XML contents are applied for improving the interoperability. The performance test of the system needs to be conducted by comparing results other developed DNA analysis services at the stabilization stage.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.340-347
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• 2008

Ubiquitous services are high quality and differentiated services which are provided for users by recognizing the context of users and environmental conditions actively. In this case, context-aware middleware is one of the most important technologies required to implement the ubiquitous services. In this paper, we propose a method for providing ubiquitous services in a specific user space effectively and monitoring human bio-sensors. That is, the design and implementation of intelligent home service middleware and monitoring bio-sensors based on context awareness is discussed here. Context information from various sensors is gathered, and suitable services are inferred and provided to users by the middleware system. In our approach, user services can be modelled easily by using facts and rules, and the system can be extended easily to support various ubiquitous services other than intelligent home services also. The system can be integrated with external applications and legacy systems effectively by using various protocols such as RMI, socket and HTTP, XML and etc. We have designed and evaluated various facts and rules for intelligent home services in real environments. Functionality evaluation with the system shows that ubiquitous services can be provided to users effectively in a home environment.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.11
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• pp.2097-2104
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• 2008

Ubiquitous services are high duality and differentiated services which are provided for users by recognizing the context of users and environmental conditions actively. In this case, context-aware middleware is one of the most important technologies required to implement the ubiquitous services. In this paper, we propose a method for providing ubiquitous services in a specific user space effectively and monitoring human bio-signal sensors. That is, the design and implementation of intelligent home service middleware and monitoring human bio-signal sensor based on context awareness is discussed here. Context information from various sensors is gathered, and suitable services are inferred and provided to users by the middleware system. In our approach, user services can be modelled easily by using facts and rules, and the system can be extended easily to support various ubiquitous services other than intelligent home services also. The system can be integrated with external applications and legacy systems effectively by using various protocols such as RMI, socket and HTTP, XML and Zigbee etc. We have designed and evaluated various facts and rules for intelligent home services in real environments. Functionality evaluation with the system shows that ubiquitous services can be provided to users effectively in a home environment.

• Journal of Internet Computing and Services
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• v.12 no.1
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• pp.55-70
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• 2011

In this paper, we propose a policy-driven RFID data management event definition language, which is possibly applicable as a partial standard for SSI (Software System Infrastructure) Part 4 (Application Interface, 24791-4) defined by ISO/IEC JTC 1/SC 31/WG 4 (RFID for Item Management). The SSI's RFID application interface part is originally defined for providing a unified interface of the RFID middleware functionality―data management, device management, device interface and security functions. However, the current specifications are too circumstantial to be understood by the application developers who used to lack the professional and technological backgrounds of the RFID middleware functionality. As an impeccable solution, we use the concept of event-constraint policy that is not only representing semantic contents of RFID domains but also providing transparencies with higher level abstractions to RFID applications, and that is able to provide a means of specifying event-constraints for filtering a huge number of raw data caught from the associated RF readers. Conclusively, we try to embody the proposed concept by newly defining an XML-based RFID event policy definition language, which is abbreviated to rXPDL. Additionally, we expect that the specification of rXPDL proposed in the paper becomes a technological basis for the domestic as well as the international standards that are able to be extensively applied to RFID and ubiquitous sensor networks.