• The KIPS Transactions:PartD
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• v.16D no.4
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• pp.583-594
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• 2009

Most of the SOA solutions applicable to businesses and organizations are taking a top-down methodology. It starts with an analysis of an organization's requirements, followed by definition of business models and identification of candidate services and ends with finding or developing required services. Challenges in adopting SOA while abandoning legacy systems involve time and cost required during the process. Many businesses and organizations want to gradually migrate into SOA while making the most of the existing system. In this paper, we propose A Method for Migration of Legacy System into Web Service(M-LSWS); it allows legacy system to be migrated into web service accessible by SOA and be used as data repositories. M-LSWS defines procedures for migration into reusable web services through analysis of business processes and identification of candidate services based on design specification and code of legacy system. M-LSWS aims to migrate of legacy system into web service appropriate for SOA. The proposed method consists of four steps: analysis of legacy system, elicitation of reusable service and its specification, service wrapping and service registration. Each step has its own process and guideline. The eligibility of the proposed method will be tested by applying the method to book management system.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.514-516
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• 2004

시스템의 요구사항이 복잡해짐에 따라, 분산 환경의 시스템간에 일부 기능 모듈을 컴포넌트로 개발하여 공유하는 형태로 시스템이 발전하고 있다. 그러나 컴포넌트는 특정 기술에 종속적이면서 상대적으로 연관도가 높아 동일한 환경에서의 재사용성은 뛰어나지만, 플랫폼과 구현 언어에 의존성이 강하여 상호운용의 문제가 발생한다. 이를 보완하기 위한 아키텍쳐 중 하나인 SOA는 구현 기술로부터의 독립성 및 유연성(Flexibility)이 높아 이기종 시스템간 통합 구축에 적합하다. 본 논문에서는 컴포넌트의 상호운용 능력을 높이기 위한 방안으로 SOA와 CBD를 이용한 웹서비스(Web Services) 모델을 제안하였다. 또한 기존 어플리케이션에 존재하는 컴포넌트를 래핑(Wrapping)하여 재사용 가능한 서비스를 생성하여 제공하고, 이기종 환경에서 재사용하는 구현 사례를 제시함으로써 높은 상호운용 능력이 있음을 보였다.

• Journal of Digital Contents Society
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• v.8 no.2
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• pp.107-112
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• 2007

With the evolution to distributed computing technology, the concept of conventional client/server function has been advanced to Service-Oriented Architecture, which can share the information between heterogeneous systems as services. To success Service-Oriented Architecture, the conjunction between business layer and application layer is one of the important techniques. In this paper, we classify services into two views, vertical and horizontal, and introduce matching technique with service classification for SOA.

• Journal of the Optical Society of Korea
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• v.18 no.1
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• pp.65-70
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• 2014

This paper presents the simulation and design of an all-optical subtractor using a quantum-dot semiconductor optical amplifier Mach-Zehnder interferometer (QD-SOA MZI) structure consisting of two cascaded switches, the first of which produces the differential bit. Then the second switch produces the borrow bit by using the output of the first switch and the subtrahend data stream. Simulation results were obtained by solving the rate equations of the QD-SOA. The effects of QD-SOA length, peak power and current density have been investigated. The designed gate can operate at speeds of over 250 Gb/s. The simulation results demonstrate a high extinction ratio and a clear and wide-opening eye diagram.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.10B
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• pp.988-993
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• 2009

In recent years, the development of ubiquitous computing technology as vital information anytime, anywhere to monitor and manage the demand for U-healthcare services is increasing. Accordingly, remote blood sugar management, remote blood pressure management, and research on U-healthcare service have been very active. But, the existing U-healthcare service monitoring devices and services has been implemented in different operating platforms and programing languages which are provided by diverse application service providers. For this reason, the users have difficulty in receiving diverse U-healthcare services. In this paper, SOA-based U-healthcare monitoring system has been designed and implemented. Through implementation, it is confirmed that the proposed SOA based U-healthcare monitoring system can increase the reuse of each service component to make it easier to reconstruct the structure of the new services.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.5
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• pp.24-32
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• 2011

According to accelerate the convergence of defense and information technology, there is a need for innovative change in Military e-Learning service system. In other words, It has increased the need for system integration based on standards and interoperability to develop into a network-centric information and knowledge. In this study, It would like to introduce an integrated direction Military e-Learning service system on the SOA-based video content services in the operating system for the operating model. SOA is taking advantage in integration and expansion of the unit with a process. Using it, define of video services platform architecture and define of business model based on the Imprimatur model. Based on this, it define the role of actors for video content service in each step of the operating model, that is Production model, Brokerage model and consumption model. In the operating system, it define the functions and data to control and handle the needed functionality for video content services based on the operational model.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.4B
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• pp.362-370
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• 2011

The current healthcare information systems field demand for healthcare construction and operation of various systems. Therefore, the budget is constantly increasing for information systems. But the current system have been lack of data that provide real-time issues. Because standardization and real-time networks are not configured. In this paper, proposed web services-based integration of information systems about healthcare sector. Web Services as the primary means to pursue integration SOA(Service Oriented Architecture). SOA could add new requirements without significantly altering the existing system. And SOA is an important model that can quickly adapt to the environment in healthcare field of changing rapidly. In this paper, the healthcare sector based on SOA design and implement an integrated information system. The integrated information system is proving to be a suitable model based on web service platform for healthcare data and service integration.

• Journal of the Korea Society of Computer and Information
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• v.14 no.10
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• pp.123-131
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• 2009

In this paper, we design ZigBee RF based framework for mobile web service on collected data by sensor node and transmitting data to data base by sensor network and remote sensing server through wireless connection. The proposed system is an integrated platform of sensor network for the sensor management and providing SOA based sensor web access. This paper combines SOA technology with sensor network. composes sensor node as web view, and provides high capability. extensiveness, reliability, and usability to the user who accesses to sensor web. The mobile message conversion module, SOAP message processing module. WSDL message generator, and mobile web service module is embodied for improving the capacity of the framework. The capacity evaluation of local wireless communication system which is proposed in this paper is analyzed through NS-2 simulation.

• Journal of KIISE:Software and Applications
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• v.35 no.2
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• pp.91-104
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• 2008

Service-Oriented Computing (SOC) is the development method that published services are selected and composed at runtime to deliver the expected functionality to service clients. SOC should get maximum benefits not only supporting business agility but also reducing the development time. Services are selected and composed at runtime to improve the benefits. However, current programming language, SOC platforms, business process modeling language, and tools support either manual selection or static binding of published services. There is a limitation on reconfiguring and redeploying the business process to deliver the expected services to each client. Therefore, dynamic selection is needed for composing appropriate services to service clients in a quick and flexible manner. In this paper, we propose Dynamic Selection Handler (DSH) on ESB. we present a design method of Dynamic Selection Handler which consists of four components; Invocation Listener, Service Selector, Service Binder and Interface Transformer. We apply appropriate design patterns for each component to maximize reusability of components. Finally, we describe a case study that shows the feasibility of DSH on ESB.

• Journal of Korea Multimedia Society
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• v.12 no.11
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• pp.1680-1691
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• 2009

To improve the quality of healthcare and build up the health delivery system, electronic health record system is important for healthcare institutions providing health services. However, the systems currently operated in domestic healthcare institutions use independent software interface with distributed environment for data search and process. Therefore, it raises an additional expense to buy or develop each interface module when there is a link to new system and the problem of complexity. To solve these problems, this study implemented the service oriented architecture basis for home nursing service and carried out an assessment. The study defined the process modeling and business requirements based on the scenario of service and drew 17 suitable services based on five verification items for service design. To draw the final service, seven services were selected by service litmus test (SLT). The study found that, by the improvement of business process for healthcare service support department, SOA based information system has an effect of time reduction of patient processing time. In conclusion, to enable the hospital information system to cope with various demands of healthcare consumers, it is necessary to consider the application of SOA technology which has excellent interoperability, reusability and maintenance.