• International Journal of Knowledge Content Development & Technology
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• 제2권2호
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• pp.31-45
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• 2012

This study prepared a foundation to provide high-quality services in a stable and effective way to meet the customer expectations, by building up and establishing an ISO 20000 certified IT service management system and protecting the information assets from various threats through effective system operation that meets the requirements of international standards, in order to ensure the reliability and stability of NDSL public services provided by KISTI Information Service Center and to enhance the customer satisfaction.

• 전자공학회논문지
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• 제50권1호
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• pp.51-63
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• 2013

MANET의 기반 연구 기술들의 결과를 토대로 현실 속에서 MANET을 활용하기 위한 응용으로써 다양한 서비스 발견 및 전달 기법들이 제안되고 있다. 본 논문에서는 MANET에서의 메시지 오버헤드의 최소화와 안정적인 서비스 발견 및 네트워크의 확장성을 보장하기 위한 T-Chord(Trustworthy-based Chord) 링 시스템을 제안한다. T-Chord 링 시스템은 모바일 환경에서 이동 노드들이 제공하는 서비스들을 효율적으로 관리하기 위해 P2P 오버레이 네트워크 기법을 이용한 서비스 발견 시스템으로, MANET에서 이동 노드들은 이동성을 갖으며 서비스 요청 노드, 서비스 제공 노드 그리고 서비스 전달 노드로써 동작하기 위해 이동 노드들의 Trustworthy 평가와 분산된 서비스 정보의 수집, P2P 오버레이 네트워크의 구성을 통한 O(Log N) 성능을 제공하는 Chord 알고리즘 모듈로 내부 시스템을 구성하였다. 시스템의 성능 평가는 NS2 시뮬레이터를 이용하여 기존의 서비스 발견 기법들과 서비스 발견 메시지 오버헤드, 서비스 발견 및 전달의 효율성, 네트워크의 확장성 측면에서 성능을 비교 평가하고 분석함으로써 MANET에서 효과적인 서비스 발견 및 전달의 우수함을 입증하였다.

• ETRI Journal
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• 제32권2호
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• pp.241-247
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• 2010

We propose and experimentally demonstrate a service-aware optical transport system. The proposed service-aware optical transport system makes a flow based on service type and priority of traffic. The generated flow is mapped to a corresponding sub-${\lambda}$ for transport over an optical network. Using sub-${\lambda}$ provided by the centralized control plane, we could effectively provide quality-of-service guaranteed Ethernet service and best-effort service simultaneously in a single link. The committed information rate (CIR) traffic and best-effort traffic are assigned to different sub-${\lambda}s$. The bandwidth of the CIR traffic is guaranteed without being affected by violation traffic because the bandwidth is managed per each sub-${\lambda}$. The failure detection time and restoration time from a link failure is measured to be about 60 ${\mu}s$ and 22 ms, respectively, in the ring network. The measured restoration time is much smaller than the 50 ms industry requirement for real-time services. The fast restoration time allows the proposed service-aware optical transport system to offer high availability and reliability which is a requirement for transport networks.

• 통상정보연구
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• 제11권1호
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• pp.3-25
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• 2009

These days international trade has been converting to e-Trade formation. At this point, Korea has been striving for the trade facilitation; reducing logistics cost and improving foreign competitiveness by computerization operations of the maritime transportation that logistics and customs clearance are involved. However, due to the substantial characteristic of logistics service, the necessity of flexible and various logistics service development using internet has been strongly suggested. In particular, the logistics service which could share documents related to international physical movement between shippers and logistics organization. In this regard, this study carried out interview to explore the problems of physical distribution service and to suggest development direction of e-logistics service. The reason why this survey carried out is that most of users want more effective e-logistic service that could diminish successively real expense decrease. After analysis of survey results, this paper presents the basic development direction and emphasis development subjects. Therefore, the basic direction is presented from four viewpoints; customer-oriented approach, service-oriented approach, total approach and step-by-step implementation. Furthermore six development subjects; web-based standard module development for small and medium forwarders, development of standard logistics ERP system, collaboration model between KTNET and KLNET, system improvement for real users, on-demand system building for SMEs and connection with legacy system have been required.

• ETRI Journal
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• 제38권5호
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• pp.847-857
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• 2016

Broadcasting services such as multi/single channel HDTV and 3DTV/2DTV use a multi-channel encoder that changes the bitrate and composition of the video service depending on the time. However, this type of multi-channel encoder could cause a longer latency owing to the variable bitrate and relatively bigger size of the buffers, which results in the same delay as in 3DTV even for a conventional DTV service. On the other hand, systems built based on separate encoders, each of which is optimized for the target service, might not have such latency problems. Nevertheless, there might be a distortion problem in the image and sound at the time of a switchover between two encoders with different output bitrates and group of picture structures. This paper proposes a system that can realize a seamless video service conversion using two different video encoders optimized for each video service. An overall functional description of the video service change control server, which is a main control block for the proposed system, is also provided. The experiment results confirm the seamless switchover and reduced broadcasting latency of DTV services compared with a broadcasting system composed of a multi-channel encoder system.

• 농촌계획
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• 제22권2호
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• pp.99-107
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• 2016

Forest service government has been prepared a Forest welfare voucher service system base on published law on th Promotion Welfare Forest. The purpose of this research is study on domestic situation and set on direction of voucher service before started it. In particular, voucher service will be implemented to Forest service government's recreation facilities area, awareness of voucher service system of its users and operators need to be reveal, and also other government's similar voucher operator's opinions also investigate. From those results, it find out introduction factors of forest welfare services voucher system. Recognition investigating survey result shows that the ordinary people are interested in programs, the forest recreation experts are interested in 'Construction and utilization of forest infrastructure', other voucher's experts are interested in 'Training', and ordinary people are interested in 'voucher programs'. So each respondents' results are different in important factors of introducing welfare service voucher system.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.373-377
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• 2001

This study is to examine the factors that influence the performances of service quality in university hospitals by investigating systematically the condition of service quality. A synthesis of the health care quality is conducted to identify physical quality, operating process quality, and human resources quality that relate to both the overall satisfaction and intention of revisit. Based on the proposed hypotheses, the relationships between the service quality factors and performance are examined using data collected from 167 patients in three hospitals, Korea. Reliability and validity tests are performed for examining its relationship with service quality in health care systems. Total eight independent variables with respect to three service quality levels and two dependent variables for performance are identified for relationships between service quality and performance in health care systems. The results provide health care managers with a managerial insight to the planning function of performance with service quality in health care systems as well as other operations (business, government, or other service organizations) systems. Implication of the study for theory, future studies, and practices are discussed.

• 한국안전학회지
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• 제24권5호
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• pp.113-121
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• 2009

The objective of this study is to develop highway advisory radio service for road safety oriented system design of the point by regional groups or geographical distributions. To develop these highway advisory radio service, traffic information provided service areas, responds for incident and accident, and road condition in service sections based on traffic information of highway advisory radio service. This study contributes to service of traffic information for safety driving, which is transport congestion areas and recognition of traffic congestion status in advanced traffic information service. As result of this study, systematic design of the advanced highway and traffic safety guides to management systems by highway advisory radio service.

• Journal of Pharmaceutical Investigation
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• 제23권2호
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• pp.97-102
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• 1993

Hospital pharmacy services are divided into dispensing affairs for inpatients and outpatients, pharmaceutical service, stock control, intravenous admixture service, drug information service, pharmacokinetic consultation service, education and research work, etc. But among those affairs, dispensing affair for outpatient is perceived as the most important work in Korea, because it is linked directly with hospital service for patients. Therefore, total computer system for dispensing area was adopted from opening point of hospital in 1989 in Asan Medical Center. Utilization of computer system for outpatient dispensing area is as follows; 1) Order communication system of prescription by Total Hospital Information System, 2) Automatic print-out system of direction for use by sticker connected with on-line net work, 3) Use of automatic tablet counting and packaging machines connected with on-line net work. Those computer system resulted in curtailment of pharmacy manpower and shortening of waiting-time for outpatient.

• 제어로봇시스템학회논문지
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• 제10권9호
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• pp.785-798
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• 2004

This paper introduces the development of a range sensor based integrated navigation system for a multi-functional indoor service robot, called PSR (Public Service Robot System). The proposed navigation system includes hardware integration for sensors and actuators, the development of crucial navigation algorithms like mapping, localization, and path planning, and planning scheme such as error/fault handling. Major advantages of the proposed system are as follows: 1) A range sensor based generalized navigation system. 2) No need for the modification of environments. 3) Intelligent navigation-related components. 4) Framework supporting the selection of multiple behaviors and error/fault handling schemes. Experimental results are presented in order to show the feasibility of the proposed navigation system. The result of this research has been successfully applied to our three service robots in a variety of task domains including a delivery, a patrol, a guide, and a floor cleaning task.