• Journal of Advanced Marine Engineering and Technology
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• v.32 no.4
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• pp.611-617
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• 2008

In ubiquitous environments, the content adaptable services can be dynamically provided to adapt the frequent changes of contexts. These services have common things that the kinds of context factors are limited to ubiquitous environment, though the contexts are flexible. To reuse service architecture can be reasonable for effective adaptable service. In this paper, we design a software architecture with product line techniques for content adaptable applications in ubiquitous environment. Description of product line is to define variation points and their variants, to find out the dependencies between them and to keep the model based architecture, their alternatives.

• Journal of the Korea Society for Simulation
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• v.14 no.3
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• pp.119-127
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• 2005

Web services and their composition (web processes) are promising technologies to efficiently integrate disparate software components over various types of systems. As many web services are nowadays available on Internet, quality of services (QoS) and performance/cost become increasingly important to differentiating between similar service providers. In this work, we introduce sPAC (Web Services Performance Analysis Centre) and show how customers can benefit from sPAC to consider performance in composing and commercializing web services. sPAC 1) helps users to graphically describe the workflow of web services, 2) invokes web services to test out performance for light load conditions, 3) automatically converts the web services and the flow between them into a simulation model, 4) conducts extensive simulations for heavy load conditions and various usage patterns, and 5) reports analysis results and estimation data for the web services.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.30 no.4
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• pp.96-102
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• 2007

The most fundamental method in IT innovation up to today is the SOA which has been accepted as the standard for the system integration and makes the business more flexible. Although it is important to classify the workflow of enterprise into the unit of services, there is no systematical research on this topic yet. This paper proposes a SOA deployment methodology, which composed of 6 steps. By utilizing this methodology, an enterprise can build up the SOA applied environment easily to achieve its business objectives and to make a linkage between services and business processes more effectively and efficiently, which is proved through Analytic Hierarchy Process. It is considered that Service Oriented Architecture can be the future standard for the IT integration beyond the individual application.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.584-587
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• 2008

In this paper, we propose a real time video codec adapter for enabling video communications with terminals having a codec which is different from each other. When multimedia services are playing with an office service phone such as a video phone or software phone which has video capability, each terminal is not being considered to have optimized video or voice codec. So when a video phone with only one type of video codec is used in the video streaming service which requires another type of codec, the streaming service is not successful without codec transformation. The real time codec adapter in this paper provides a real time code transformation which enables communication services such as video conferencing between terminals which have different codec.

• Journal of Information Technology Services
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• v.5 no.3
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• pp.165-172
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• 2006

In this paper, we designed a new type of X-internet framework by using Flash component and server service API and analyzed its performance. Proposed X-internet framework uses Flash MX Professional 2004, Java, and software which opened middleware and database. Since proposed framework use the server service API that we developed in this paper and Flash player, this framework does not need server module. Proposed framework enables to obtain design with dynamic user interface compare to Web application and enables to reduce development time. In analytical results, it has been shown that proposed x-internet framework have efficient characteristics such as network traffic, low development cost and dynamic user interface implementation. Since proposed X-internet framework can operate in environment of current developer friendly, it is useful for development of various new application programs and we confirm it through Flash web mail implementation by using proposed x-internet framework.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.1
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• pp.155-161
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• 2012

The firmware upgrade, which is remotely performed, is an essential function in smart metering or AMI (Advanced Metering Infrastructure). In other words, the AMI software and firmware can be switched for maintaining and improvement without replacement of H/W devices in AMI environment. Also, if number and type of devices are increase, the demand of remote update service will be increased. Through the firmware upgrade service remotely, the electric power corporation may be able to benefit various fields. For example, there are to adapt more easily in many environments, real-time service and to cut maintenance costs. In this paper, we proposed to design an international level FUMS(Firmware Upgrade Management System) which includes requirement function, architecture and protocol related with DCU, Smart Meter.

• International Journal of Computer Science & Network Security
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• v.21 no.6
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• pp.35-46
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• 2021

Small and Medium Enterprises (SMEs) are increasingly using ERP systems to connect and manage all their functions, whether internally between the different departments, or externally with customers in electronic commerce. However, the selection of the right ERP system is usually an issue, due to the complexities of identifying the criteria, weighting them, and selecting the best system and provider. Because cost is usually important for SMEs, ERP systems based on Cloud Software as a Service (SaaS) has been adopted by many SMEs. However, SMEs face an issue of selecting the right system. Therefore, this paper proposes a fuzziness ranking engine system in order to match the SMEs requirements with the most suitable service provider. The extensive experimental result shows that our approach has better result compared with traditional approaches.

• Annual Conference of KIPS
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• 2009.04a
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• pp.452-455
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• 2009

서비스 지향 아키텍처(Service-Oriented Architectrue : SOA)개발 프로젝트에서 서비스를 식별하는 단계는 가장 중요한 단계 중에 하나로써 이후 개발단계에서 성공적인 결과를 낳는데 큰 영향을 미친다. 더욱이 잘못 식별된 서비스는 향후 상세설계 및 구현시 여러 차례에 걸친 반복(iteration) 과정을 불러 일으켜 시간은 물론 비용을 낭비하게 된다. 서비스 식별을 위한 여러 가지 방법이 연구되어 왔다. 그러나 이러한 방법은 경쟁이 치열한 환경에서 경쟁력 있는 솔루션을 생산하기에는 부족한 면이 있다. 즉 잠재적인 시장 경쟁력을 확보하기 위한 방법으로서 고객에게 필요로 하는 서비스를 적절하게 판단하고 식별할 수 있는 서비스 식별방법이 필요하게 된 것이다. 따라서 본 논문에서는 요구공학에 기초를 둔 Value Innovative Requirements Engineering[1]을 적용하여 고객에게 필요한 서비스를 식별하는 방법을 제시하고 있다.

• Annual Conference of KIPS
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• 2009.11a
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• pp.825-826
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• 2009

서비스 지향 아키텍처(Service-Oriented Architecture)의 특징은 비즈니스와 IT 간의 차이를 줄여 일관성을 유지함으로써 급변하는 비즈니스 환경하에서 기업의 IT 서비스가 민첩하게 대응할 수 있도록 하는 것이다. 이러한 SOA의 특징을 만족시키기 위해서 서비스를 식별하는 시작점으로 비즈니스 프로세스가 무엇보다 중요하다고 할 수 있다. 하지만 비즈니스 프로세스를 분석하여 IT 관점의 서비스를 식별하기 위한 구체적인 절차, 활동, 산출물을 제시하는 방법에 관한 연구가 미흡한 실정이다. 본 논문에서는 BPMN을 이용한 비즈니스 프로세스 모델로부터 IT 관점인 유스케이스 모델을 도출하여 서비스를 식별하기 위한 구체적인 방법을 제안한다.

• Annual Conference of KIPS
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• 2009.11a
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• pp.943-944
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• 2009

본 논문은 임의의 호스트의 실행 환경과 리소스에 대한 변경 없이 독립적으로 응용 프로그램 수준의 가상화를 제공하는 단일 실행 파일을 가지는 이동형 SW의 제공 방법에 대하여 소개한다. 이는 실행 포맷 변환기를 통하여 설치형 SW에서 추출된 이동형 SW 정보를 본 논문에서 제공하는 응용 파일 시스템에 구축하고, 이를 실행하기 위하여 윈도우 기반 시스템에서 사용자 레벨의 라이브러리 후킹 기술을 이용한 가상 실행 라이브러리와, 이 가상 실행 라이브러리를 실제 구동되는 이동형 SW 프로세스에 바인딩하여 실행시키게 하는 실행 엔진 모두를 하나의 파일에 제공하는 방법 대하여 기술한다