• Title/Summary/Keyword: Internet Reference Service

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On the Virtual Reference Shelves of Chinese University Libraries (중국 대학도서관 가상참고서가의 구축현황과 분석)

  • Xian, Yan-Jin;Park, Joon-Shik
    • Journal of Korean Library and Information Science Society
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    • v.39 no.2
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    • pp.147-167
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    • 2008
  • The purpose of the research is to 4ind out its problems and to suggest its solution by investigating and analyzing the present condition of the Virtual Reference Shelves establishment in Chinese university libraries. To achieve the goal, this study establishes theoretical foundations for virtual reference shelves. The evaluation standard was set up on the basis of this theoretical foundation. The 38 university libraries, which had been selected in 985 Project were analyzed by this evaluation standard. The results are used to justify the cooperative establishment for virtual reference shelves.

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A Bandwidth Allocation Method by Internet Service Types - Focus on Elementary and Middle Schools (인터넷 서비스 유형별 대역폭 할당 방안 - 초.중등학교 중심으로)

  • Park, Hyeong-Yong;Hwang, Jun;Kim, Jae-Hyoun
    • Journal of Internet Computing and Services
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    • v.11 no.1
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    • pp.49-57
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    • 2010
  • Today, internet traffic is rapidly increasing by the appearance of a large number of website thru a numerous internet service provider and the introduction of advanced teaching methods like utilizing ICT(Information and Communication Technology) education. At these actualities, it is requested to increase internet bandwidth in the scene of school; however, it is difficult to resolve the request quickly because of the government's budget and technical problems. In this circumstance, this paper proposes a method to raise the efficiency of internet operations with the current bandwidth. In order to achieve the purpose of this paper, the analysis of internet traffic has been done by the traffic currently being used in school, and an internet bandwidth distribution model differ from the existing standpoint is developed with the analyzed result. It can be used to predict the increase in the bandwidth which may be requested at school in the future, and it can support the office of education for appropriate bandwidth allocation at schools and reduction of school budget in telecommunication. Also, it can be adopted as a future oriented reference model for network policy.

Online Information Technologies and the Changing Roles of Reference Librarians (온라인 정보기술 환경과 참고사서의 역할 재고)

  • Noh Ock-Soon
    • Journal of the Korean Society for Library and Information Science
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    • v.32 no.2
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    • pp.121-142
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    • 1998
  • Based on the comprehensive literature search and the sample library surveys, some observations are made on the impact of online information technologies for reference services. Various issues specifically with OPAC, CD-ROM, remote database access, and internet environment are overviewed as the source of and trigger for change in reference librarianship and in terms of expectations as well as difficulties. The paper then focuses on how these technologies influence on the roles of reference librarians as intermediaries in information providing, instructing, consulting, and evaluating functions. This leads to rethinking the conceptual basis of today's reference service and the competencies for reference librarians with new functions and responsibilities.

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Performance Evaluation of the Question and Answer Services in Internet Portals (인터넷포털 지식검색의 질문응답서비스 성능평가)

  • Chang, Hye-Rhan;Lee, Eun-Tae
    • Journal of Information Management
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    • v.37 no.2
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    • pp.137-156
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    • 2006
  • To evaluate the performance of the question and answer services provided through the internet portals in Korea, question and answer transcript of four major services were sampled systematically. Using the digital reference evaluation framework, number and types of questions, response rate, timeliness, accuracy for information questions and user satisfaction were measured and analyzed. The level of the service performance is identified and compared. The conclusion includes suggestions for service improvement.

A Comparative Analysis of Service Charge and Discount Scheme of ISDN Operators (ISDN 사업자들간 서비스 요금 및 할인체계 비교)

  • 김문수
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.25 no.9B
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    • pp.1618-1634
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    • 2000
  • ISDN, the beginning of broadband and multimedia service, is a digital network that provides integrated end-to-end digital telecommunication services for transmissions of different kinds of information, from voice and facsimiles to data and images. In Japan, Britain and U. S there has been shown the demand of ISDN is considerable and ISDN technology is becoming quite stable. Furthermore,their ISDN service experience helps them to set up and carry out the marketing strategies for Internet access services such as ADSL, Cable Modem and WLL, etc. This paper examines and compares services, charge and discount scheme of ISDN across 14 telecommunication carriers. It can be utilize as a reference for diffusing ISDN as well as developing Internet access services and marketing strategies.

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A Research on The Real Time Video Traffic Transmission Mechanism in IP Based Mobile Networks (IP기반 이동네트워크에서 실시간 비디오 트래픽 전송 메카니즘에 관한 연구)

  • 강문식;이준호
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.8A
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    • pp.879-888
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    • 2004
  • In this paper, we propose a real time QoS(Quality of Service) guaranteed transmission mechanism for MPEG video traffic at the congested node in IP based networks. Recent spread of the Internet has increased the demands of a real time multimedia service of the quality, Because the type of Internet services can, however, offer the best effort delivery strategies, it is difficult to treat all the types of traffic with differential COS (Class of Service). Most of all, the hierarchical coding method of MPEG data utilizes the reference frame for the motion prediction. The loss of the reference frames makes QoS of the video traffic degraded because the reference frame bit error causes the consecutive packet loss. Therefore we have studied the real time QoS guaranteed mechanism for video traffic by analyzing the previous methods. Computer simulation results show that the proposed scheme has better performance than the previous one.

Implementation of ATM/Internet Gateway System for Real Time Multimedia Service (실시간 멀티미디어 서비스를 위한 ATM/Internet 게이트웨이 시스템의 구현)

  • Han Tae-Man;Jeong You-Hyeon;Kim Dong-Won
    • The KIPS Transactions:PartC
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    • v.11C no.6 s.95
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    • pp.799-806
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    • 2004
  • A growing diversity of pervasive devices is gaming access to the Internet and other information. However, much of the rich multimedia contents cannot be easily handled by the client devices because of the limited communication, processing, storage and display capabilities. The in-tegration of voice, data and video service modified the target of networking technologies. Networks must have some the capabilities for in-tegration of various services and also for QoS support as required by each of those service. Because of these reasons, we developed EAGIS(Efficient ATM Gateway for real time Internet Service) to provide seamless multimedia service between the ATM network and the Internet. EAGIS consists of the interworking unit, content server, transcoding server, and the serveice broker to provide seamless multimedia service be-tween the ATM network and the Internet. In this paper, we design the architecture and transcoding service scenario of the EAGIS. When the RTP is used for the bi-directional communication, transcoding time is configured by the time-stamp of RTCP. When HTTP is used for unidirec-tional communication, self-timer is used. By using these reference time, standard transcoding method is applicable according to the frame trans-mission rate and network traffic load. And we can also assure the QoS of the multiple users` effective bandwidth by our algorithm.

Proposed Assessment for Quality of Experience of Live IPTV in Home Environments

  • Jeong, Jongpil;Choi, Jae-Young
    • International journal of advanced smart convergence
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    • v.4 no.1
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    • pp.18-30
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    • 2015
  • As the speed of networks that subscribers can use has greatly increased, demand for high-quality broadcast content, such as from Internet Protocol Television (IPTV) and Video on Demand (VoD), is likewise increasing. Therefore, while broadcasters are increasing content and channels, they are striving to improve consumer quality of experience (QoE) to differentiate themselves from competitors, including by producing higher physical-quality content. Recently, subjective measurement methods have been internationally standardized as the most reliable approach for measuring and evaluating IPTV QoE. However, a majority of these methods are performed in experimental environments and are based on the extremely brief viewing period of approximately ten seconds using original reference videos. It is actually difficult to apply standard evaluation methods based on a ten-second viewing interval to assess real broadcast watching of IPTV or other services that involve a longer time (i.e., more than thirty minutes). In this paper, we therefore propose a method that accommodates actual viewing environments. Using the mean opinion score, we experimentally analyze the effects of evaluation interval changes under actual conditions in which IPTV service is provided. In addition, we propose improvements by applying the results into actual live broadcast IPTV service and by analyzing consumer service QoE.

Business Model and Floral Distribution Service Strategy for Creating New Value on Internet Environment - ROSEWeb Solution Case - (인터넷 환경에서 새로운 가치 창조를 위한 비즈니스 모델과 화훼 유통 서비스 전략 - ROSEWeb 솔루션 사례 -)

  • Lee, Seung-chang;Ahn, Sung-hyuck
    • Journal of Distribution Science
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    • v.7 no.1
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    • pp.5-34
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    • 2009
  • This article describes a business case of ROSEWeb, a floral distribution service by internet of Newrun System Company. Newrun System is one of the floral distribution IT solution company. The purpose of this case study is to find out which factors of ROSEWeb solution of successful business model and internet distribution strategy that plays an important role as the floral distribution IT service. ROSEWeb has experienced many challenging obstacles while they prepare for this floral distribution IT service. This case study has found that Newrun System Company execute the rapidly transformation of business model to cope with changing situation. Specially, so far, ROSEWeb continuously keep on competitive advantage as floral distribution IT service through building core competence. this study shows that ROSEWeb's case broadly apply reference model to the building business model and formulating floral distribution service strategy and other internet business models. Finally, we intends to discuss about theses questions. the question is "by the existing state of entering Internet portal(Yahoo, Naver, Daum), Can ROSEWeb have sustainable competitive advantage in floral distribution service?", and "what is Newrun System's next business model?". Through the intensive interviews with people involved in the development of ROSEWeb, this article provides important implications to the business community who is preparing for new applications for mobile internet.

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A Relationship Management Service for Consistent References Between Domain Objects (도메인객체의 일관성 있는 참조를 위한 연관정보 관리 서비스)

  • Choi, Yun-Seok
    • Journal of Internet Computing and Services
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    • v.8 no.4
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    • pp.129-136
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    • 2007
  • The domain model pattern which belongs to enterprise architecture patterns has reusability, scalability and maintainability. To use the domain model pattern, mapping with persistency layer, transaction management and various services are needed. This paper proposes that relationship management service to solve a consistency error which arises in case of removing domain objects. The proposed relationship management service monitors methods of domain objects and intercepts the flow of control to solve the reference errors. This service is implemented by using AOP(Aspect-Oriented Programming), so it can provide the service without modifications of domain objects and other services.

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