• 한국통신학회논문지
• /
• 제35권2B호
• /
• pp.313-324
• /
• 2010

통신과 방송 미디어 정보의 단순 융합으로 출발한 IPTV가 이제는 이용자 요구에 능동적으로 적응하는 개인형 IPTV 서비스 형태로 발전하고 있다. 본 논문은 IPTV 서비스의 개인화 및 사용자 중심의 서비스 기능을 제공하기 위하여 서비스 오버레이 네트워크 기반위에서 IPTV 서비스를 능동적으로 제어 관리하는 DSON 구조를 제안한다. 또한 능동적인 서비스 제어 기능을 수행하기 위하여 DSON을 이용한 커뮤니티 IPTV 서비스, DSON 기반 홈 IPTV 방송 서비스 모델들이 제안된다.

• 수산해양교육연구
• /
• 제20권1호
• /
• pp.23-35
• /
• 2008

The purposes of this study are to analyze problems in industrial classification of fisheries in Korea and to suggest future directions. Based on a thorough review of relevant literature, the study proposes a five-level scheme for classifying fisheries. The highest level should be the fisheries industry, and the next highest level ought to be fisheries. The medium level should include fishing, aquaculture, and fishery service industries. At the fourth level, fishing is to be further divided into sea fishery and inland fishery, aquaculture into sea-surface aquaculture and inland aquaculture, and fishery service industries into integrated fishery service and fishery distribution service. The lowest level is the most detailed. At this level, sea fishery is split into deep sea fishery, offshore fishery, and coastal fishery; sea-surface aquaculture consists of sea aquaculture, seed production aquaculture, and food organism aquaculture; integrated fishery service is further classified into fishery-related service and fishery information service.

• 한국통신학회논문지
• /
• 제35권8B호
• /
• pp.1150-1158
• /
• 2010

At present multimedia service composed of voice, data, and video service is prevalent in the Internet. As such, wide-scale penetration of Internet service imposes tremendous pressure to the network infrastructure such as the media servers and links as well as the nodes. In addition, users from a large-scale population require broad bandwidth and high level of QoS. This requires a network with reliable and scalable services to customers, which also necessitates a realistic method for the design of the a media server. In this work, we explore the influence of user's behavior about delay on the performance of media server that takes into account the system and user attributes in a realistic manner. By incorporating user's behavior about the delay-sensitivity, we present an analytic framework for the evaluation of the performance of the media server, via which we illustrate a meaningful intuition in the provision of Internet multimedia service.

• 한국통신학회논문지
• /
• 제30권3B호
• /
• pp.105-113
• /
• 2005

본 연구에서는 PVM으로 구성된 클러스터의 공유를 기반으로 하는 단계화된 응용서비스 플랫폼을 기반으로 응용서비스를 구현함으로써 응용서비스 플랫폼의 유용성을 평가하였다. 응용서비스 플랫폼은 요청 처리에 필요한 전 과정을 요청처리 단계와 서비스제공 단계로 나누고, 서비스요청처리 단계를 위한 전위응용서버의 서비스관리자와 요청된 서비스의 분산을 담당하는 부하관리자, 그리고 후위서버에서의 서비스제공을 위한 작업관리자로 구성된다. 구현된 응용서비스 플랫폼은 필요한 처리자원을 동적으로 할당, 시스템을 재구성함으로써 기존의 단일서버 시스템에 비해 부하의 변화에 보다 능동적으로 대처할 수 있을 뿐 아니라, 기능의 변경없이 다양한 응용서비스의 구현을 지원함을 확인하였다.

• 유통과학연구
• /
• 제17권12호
• /
• pp.43-54
• /
• 2019

Purpose: Marine transportation companies must improve service quality to secure competitive advantage and continuous relationships with customers. This study explores the value and necessity of service quality in the industry by empirically identifying the factor that would have the largest effect on the improvement of service quality, also examining whether such improvement may actually influence continuous relationships. Research design, data and methodology: Based on an online survey with those in the Korean marine transportation industry, this study conducted statistical analyses using structural equation modeling. Based on relevant previous studies, the current study constructed a total of 55 survey questions. Finally, 281 questionnaires were collected, but 68 were excluded owing to invalid responses. Results: Information service attribute had the largest effect on service quality, whereas communication did not demonstrate a significant influence. In addition, distribution and information services exerted a positive effect on service satisfaction through service quality, and finally influenced relationship continuity. Conclusions: The results shows that marine logistics service quality strategies which were centered on time or local factors, should be considered in terms of the development of innovative services. In particular the improvement of information service systems and strategies in changed business environment.

• 한국식생활문화학회지
• /
• 제17권5호
• /
• pp.543-550
• /
• 2002

The purpose of this study is to provide basic materials for food service consumption culture by proving the problem with food service purchase and its improvements. For this purpose, it was attempted to grasp university students' food service purchase behavior and level of satisfaction with it and to investigate the factors influencing their level of satisfaction with food service purchase. The questionnaire research was conducted for university students living in Seoul and Chungcheong provinces. 453 questionnaires obtained from them were used for final analysis. As a results, the following finding were obtained: 1. In case of university students, their level of consumer satisfaction with food service purchase was shown to be the score of 37.99(63.06/on the basis of 100 points). They showed the highest level of satisfaction with quality, followed by facility and atmosphere, service, price and the like. 2. The factor having the greatest influence on university students' level of satisfaction with food service purchase was shown to be gender(female), followed by food service place(Korean food restaurant, Chinese food restaurant, Western food restaurant, flour-based meals restaurant), consumer attitude, average monthly food service cost.

• 한국약용작물학회:학술대회논문집
• /
• 한국약용작물학회 2007년도 추계학술발표회
• /
• pp.290.1-290.1
• /
• 2007

• 서비스연구
• /
• 제4권2호
• /
• pp.85-95
• /
• 2014

본 연구는 서비스사이언스에 관한 제 연구영역을 모형화하기 위해서 시도되었다. 제안된 모형은 3계층의 입체적 참조모형이다. 첫째 축은 서비스의 수명주기 관점의 차원이며, 두 번째 축은 서비스 관련 연구 성격의 차원, 그리고 세 번째 차원은 서비스 시스템 구성요소의 차원이다. 서비스 수명주기는 서비스 전략, 서비스 개발 그리고 서비스 실행 또는 운영을 포함한다. 서비스 관련 연구 성격은 기초연구, 응용연구 그리고 융복합연구를 포함한다. 마지막으로 서비스 시스템 구성요소는 서비스 수요자의 욕구, 서비스 역량 그리고 서비스 자원 요소를 의미하고 있다. 본 연구에서 제안된 서비스사이언스 3계층 입체 참조모델에서는 서비스사이언스와 관련된 다양한 연구주제들을 융통성있게 모두 수용할 수 있으며, 연구자 및 실무자 관점에서 원형을 변형하거나 적절히 적용할 수 있는 장점이 있다. 즉 본 연구에서 제시된 모형을 참조하여 개선된 모델들이나, 본 참조모델을 근거로 한 기업에서의 서비스사이언스 관련 적용사례들이 많이 제시될 수 있을 것이다.

• 농촌지도와개발
• /
• 제5권1호
• /
• pp.123-132
• /
• 1998

After late 1980s, new approach is needed for satisfying with people's various information needs and better quality of life on Korean extension service. The United States began modern extension service at first and has influenced many countries. Cooperative extension service has helped people practically by searching into people's problem and developing various channel to diffuse. Cooperative extension adopts changes in extension service environment and puts them to use. Based on the extension service in the United States, following recommendations were suggested; 1) carrying out extension service to meet the changing needs of people, 2) strengthening the extension function of agricultural Colleges, 3) review of cooperative agricultural research and extension, 4) developing programs and management, 5) accumulation agricultural information and utilizing them.

• 한국통신학회논문지
• /
• 제22권2호
• /
• pp.268-279
• /
• 1997

In this paper, we show the movable boundary (MB) method is the effective bandwidth allocation strategy for the ABR service among existing bandwidth allocation methods. The MB method can gurantee the QOS requirement according to the service priority and improve bandwidth utilization using the characteristics of the ABR service. The threshold values of the MB, which have an important effect upon connection blocking probability(CBP) performance of each service, are obtained by simulation. The MB method with the fixed thresholds, however, may not have good performance to variation of input traffic parameters. We suggest the dynamic MB method which changes the threshold values adaptively according to the required bandwidth of input traffic. We also show that the dynamic MB method can urantee the CBP performance according to the service priority regardless of variation of input traffic parameters.