• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2006.11a
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• pp.239-242
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• 2006

현재 우리생활은 언제 어디서나 네트워크에 접속하여 통신할 수 있는 유비쿼터스 컴퓨팅 환경화 되고 있다. 이러한 환경에서 상황인식 서비스는 의료, 여행, 가정, 교육 등 사회 전 분야에 걸쳐 응용될 수 있어 사회 전반에 걸쳐 영향을 주고 있다. 기존의 대부분의 상황인식 시스템의 연구들은 센서로부터 입력된 주변 환경 정보를 기반으로 사용자에게 적합한 서비스 제공에 중점을 두고 있다. 이로써 환경정보와 별개로 사용자가 궁극적으로 원하는 분야에 상황인식 시스템을 적용하기 위해서는 서비스 부합되지 않은 여러 요소가 존재하였다. 본 논문에서는 이러한 요소를 착안하여 사용자의 의도를 포함한 상황인식 시스템을 제안한다. 제안된 시스템은 지능형 홈 도메인 환경에서 시간에 따라 변화하는 사용자의 행위 정보를 기반하여 사용자가 향후 궁극적으로 원하는 의도를 예측 할 수 있는 시스템으로 되어있다. 또한 여러개의 작은 행위에 따른 사용자의 의도가 모여 보다 큰 사용자의 의도를 파악하는 기법을 정의하였다.

• Annual Conference of KIPS
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• 2010.04a
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• pp.934-937
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• 2010

최근 기업들의 정보 시스템들은 비즈니스 환경이 나날이 복잡해지고, 기업 운영에 요구되는 비즈니스 서비스들이 급격하게 변화되고 있다. 이러한 변화에 유연하고 민첩하게 대응하기 위한 해결책으로 서비스 지향 아키텍처(SOA : Service Oriented Architecture)에 대한 관심이 확대되고 있다. 특히 SOA가 제공하는 통합용이성, 재사용성, 확장성, 조직기민성 등의 실익으로 인해 많은 기업들은 SOA를 도입하고자 노력하고 있다. 하지만 SOA는 성능에 문제점을 가지고 있으며 대형 벤더들은 이를 해결하고자 노력해왔다. 본 논문에서는 SOA의 성능에 관한 문제점을 개선하기 위해 이전에 제시된 방법들에 대해 알아보고, SOA의 성능을 개선하고 서비스간의 메시지 전달횟수를 줄이기 위해 중계서비스를 사용하는 방법을 제안한다. 그리고 서비스를 탐색하고 서비스를 이용하는데 걸리는 시간을 줄이기 위해 서비스 리포지토리 캐쉬화 하는 방법을 제안한다.

• Annual Conference of KIPS
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• 2011.11a
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• pp.1126-1128
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• 2011

병원 이외의 환경, 특히 댁내 기반의 헬스 모니터링 관련 연구는 최근 헬스케어 시스템 관련 연구자 및 개발자들의 많은 관심을 받고 있다. 심장병이나 당뇨병 같은 만성질환을 앓고 있는 경우에는 생리학적 요소들을 일상 생활 중 지속적으로 모니터링 하는 과정이 특히 중요하다. 본 논문에서는 댁내 환경에서 서비스되고 있는 헬스케어 시스템과 병원에서 운용되고 있는 헬스케어 시스템과의 연동을 지원하고, 클라우드 환경을 활용한 생리학적 데이터 분석을 지원하는 통합 헬스케어 시스템의 구조를 제안한다. 또한, 제안된 통합 헬스케어 시스템의 구조를 활용한 질병진단 시나리오도 제시한다.

• Annual Conference of KIPS
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• 2007.05a
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• pp.225-228
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• 2007

차세대 보험시스템에서 지향하는 실시간 기업(RTE: Real Time Enterprise) 서비스가 오픈 프레임 플랫폼 기반의 다운사이징으로 구체화됨에 따라 서비스 지향 아키텍처(SOA: Service Oriented Architecture)와 이벤트 기반 아키텍처(EDA: Event Driven Architecture)가 비즈니스 어플리케이션을 변화시키는 주요한 설계 스타일로 등장하게 되었다. 이에 따라 엔터프라이즈 서비스 버스를 통한 서비스 흐름이 업무 서비스간 유연한 결합이 되도록 프로세스 관리 목적에 부합하는 연계성 방안이 필요하게 되었다. 본 연구에서는 이러한 설계 스타일의 SOA 구현방식에 있어서 비즈니스 프로세스관리(BPM: Business Process Management)에 대한 비즈니스 측면과 IT 측면의 연계성 방안을 마련하였다. 이 방안을 도출하기 위하여 관련 디자인 패턴을 연구한 후 BPM 솔루션을 활용하여 연계테스트를 통한 검증을 수행하였고, 이러한 분석결과는 향후 SOA 로 차세대프로젝트를 진행하려는 이용자들에게 아키텍처 수립 및 시스템 개발에 필요한 효율적인 방안을 제공할 수 있을 것이다.

• The Journal of Industrial Distribution & Business
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• v.9 no.10
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• pp.39-50
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• 2018

Purpose - This study is to propose discriminative management strategies to long-term care facilities based on the empirical analysis after reviewing the effects of social support, perceived by long-term care facility employees, to service orientation. Research design, data, and Methodology - The research model designed social support, job stress, organizational commitment, and service orientation. The survey collected data from 453 customers in a long-term care facility in jeju. The SPSS 18.0 package was used for analysis. Results - First, social support for long-term care facility employees has a negative(-) effect to job stress. Test results, social support factors except appraisal support had a negative impact on job stress. Second, social support has a positive(+) effect to organizational commitment. Test results, informational support, tangible support and appraisal support had significant effects on organizational commitment. However, emotional support had a positive impact on affective commitment and normative commitment. Third, social support has a positive(+) effect to service orientation. Test results had a positive impact. Fourth, job stress has a negative(-) effect to organizational commitment. In the test results, employee's continuance commitment and normative commitment had significant negative effects in job stress. However, affective commitment had no significant impact. Fifth, job stress has a negative(-) effect to service orientation. Test results showed a negative impact. Conclusions - The study implies the following. First, that there should be a change in the social perception of long-term care facilities. 'Long-Term Care Insurance for The Elderly' was enacted to emphasize this responsibility for the elderly problems as a new system. Enactment of this Act was expected to improve the quality of life of the people by stabilizing the elderly life and reducing the burden of families. Therefore, long-term care facility system should be as efficient as possible for making plans for systematic and organizational support. Second, the efforts of facility managers to minimize job stress of employees is necessary. Accordingly, performing spontaneous work is required for a comfortable working environment and management. Third, the systematic education and training to employees for service oriented behavior of the facility will be required in the long term.

• Research in Community and Public Health Nursing
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• v.15 no.4
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• pp.551-565
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• 2004

Purpose: The purpose of this study is to develop a day care center model focused on public health institutions for the elderly residing in their homes. Method: Research design for this study was a mult-level research, which consisted of a related literature review, an Internet search for knowledge of the current situation at home and abroad, on-site interviews, questionnaires collected from a sample of residents in a rural area, and a key-informants approach. Results: 1) The subjects of service - Generalized service should be provided to the elderly, 65 years and older, regardless of their assets. 2) The contents of service - Providing pre-health oriented and post-social welfare service that can integrate and satisfy a wide variety of public health and welfare needs of the elderly would strengthen the health care service of a day care center for the elderly. 3) Delivery system - Basic-level local self-governments should become a central operating body, and establishing a properly adjusted delivery system to a rural area after considering the efficiency and the access of vulnerable rural areas is needed based on modification of 'a Special Law for Agricultural and Fishery Areas' (rural public health center>rural health sub-center ${\rightarrow}$ unified health sub-center ${\rightarrow}$ public health hospital (public health center) ${\rightarrow}$ public welfare office). 4) Facility - Public health facilities such as public health centers and sub-centers should be located in areas that can easily access the facilities. 5) Funding - For day care center for the elderly in local self-government, the central government should modify a relevant implementation of subsidy in and provide some facilities and service regardless of the degree of self reliance of local self-government. 6) Human resources - It is needed to guarantee the period of workers of a day care center for the elderly, at least 3 to 5 years, with considering their specialty on aged care and avoiding circulation based positions. Furthermore, appropriate specially trained personnel such as medical workers and social workers should be placed to take care of both health service and welfare through strengthening of 'rules of law of elderly welfare,' Conclusion: future research is needed to test the model through a demonstration study using a model which may be developed in the future and to standardize the appraisal criteria of people hoping to enter a day care center for the elderly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.46-54
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• 2018

The Internet of Things (IoT) is an environment in which various devices provide services to users through communications. Because of the nature of the IoT, data are stored and distributed in heterogeneous information systems. In this situation, IoT end applications should be able to access data without having information on where the data are or what the type of storage is. This mechanism is called Service Discovery (SD). However, some problems arise, since the current SD architectures search for data in physical devices. First, turnaround time increases from searching for services based on physical location. Second, there is a need for a data structure to manage devices and services separately. These increase the administrator's service configuration complexity. As a result, the device-oriented SD structure is not suitable to the IoT. Therefore, we propose an SD structure called Name-based Service-centric Service Discovery (NSSD). NSSD provides name-based centralized SD and uses the IoT edge gateway as a cache server to speed up service discovery. Simulation results show that NSSD provides about twice the improvement in average turnaround time, compared to existing domain name system and distributed hash table SD architectures.

• The KIPS Transactions:PartD
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• v.11D no.1
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• pp.133-142
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• 2004

The next generation of web applications will need to be larger, more complex, and flexible Agent-oriented systems have great potential for these e-commerce applications. Agents can dynamically discover and compose e-services and mediate interactions. Development of software agents with CBD (Component Based Development) has proved to be successful in increasing speed to market of development Projects, lowering the development cost and providing better qualify. In this thesis, we propose a systemic development process for software agents using component and UML (Unified Modeling Language). We suggest a etA (e-business Agent) CBD reference architecture for layer the related components through identification and classification of general agent and e-business agent. We also propose the ebA-CBD process that is a guideline to consider the best features of existing agent oriented software engineering methodologies, while grounding agent-oriented concepts in the same underlying semantic framework used by UML. We first developed the agent components specification and modeled it with Goal, Role, Interaction, and Architecture Model. Based on this, we developed e-CPIMAS (e-Commerce Product Information Mailing Agent System) as a case study that provides the product information's mailing service according to proposed process formality. We finally describe how these concepts may assist in increasing the efficiency reusability, productivity and quality to develop the business application and e-business agent.

• Journal of Korean Port Research
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• v.5 no.2
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• pp.19-37
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• 1991

This work aims to : establish a model of the container physical distribution system of Pusan port comprising 4 sub-systems of a navigational system, on-dock cargo handling/transfer/storage system, off-dock CY system and an in-land transport system : examine the system regarding the cargo handling capability of the port and analyse the cost of the physical distribution system. The overall findings are as follows : Firstly in the navigational system, average tonnage of the ships visiting the Busan container terminal was 33,055 GRT in 1990. The distribution of the arrival intervals of the ships' arriving at BCTOC was exponential distribution of $Y=e^{-x/5.52}$ with 95% confidence, whereas that of the ships service time was Erlangian distribution(K=4) with 95% confidence, Ships' arrival and service pattern at the terminal, therefore, was Poisson Input Erlangian Service, and ships' average waiting times was 28.55 hours In this case 8berths were required for the arriving ships to wait less than one hour. Secondly an annual container through put that can be handled by the 9cranes at the terminal was found to be 683,000 TEU in case ships waiting time is one hour and 806,000 TEU in case ships waiting is 2 hours in-port transfer capability was 913,000 TEU when berth occupancy rate(9) was 0.5. This means that there was heavy congestion in the port when considering the fact that a total amount of 1,300,000 TEU was handled in the terminal in 1990. Thirdly when the cost of port congestion was not considered optimum cargo volume to be handled by a ship at a time was 235.7 VAN. When the ships' waiting time was set at 1 hour, optimum annual cargo handling capacity at the terminal was calculated to be 386,070 VAN(609,990 TEU), whereas when the ships' waiting time was set at 2 hours, it was calculated to be 467,738 VAN(739,027 TEU). Fourthly, when the cost of port congestion was considered optimum cargo volume to be handled by a ship at a time was 314.5 VAN. When the ships' waiting time was set at I hour optimum annual cargo handling capacity at the terminal was calculated to be 388.416(613.697 TEU), whereas when the ships' waiting time was set 2 hours, it was calculated to be 462,381 VAN(730,562 TEU).

• Journal of Engineering Education Research
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• v.13 no.1
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• pp.78-86
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• 2010

Training Curriculum Integrated Information Network is allowed to searching the all curriculums and courses related with training but also is a one stop handling integrated learning system to cover a course registration, learning and analysis of learning performance. Through developing and managing the Training Curriculum Integrated Information Network, it is available to get the various curriculum thus it is for trainers able to enforce the self oriented course choice and then high quality of training could be proposed by the diverse training curriculums and competitions. To manage Training Curriculum Integrated Information Network more effectively, active public relations marketing activities, high reliable correct information service and rich contents are required. It is essential to manage the learner and learning contents supplier, stable financial resources, personal security issue and protecting a copyright of training curriculum to be a successful network system.