• Korean Management Science Review
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• v.21 no.3
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• pp.13-22
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• 2004

We discuss that the proliferation of new types of retailers such as Internet shopping malls. home shopping systems, which use telecommunication media as means of providing information of products. makes delivery service generally available. Then. we show that the delivery service can be used strategically for profit maximization by intentionally homogenizing consumers and. furthermore, social welfare generally increases by this delivery service unless the cost of delivery service is higher than that of all consumer groups.

• Journal of the Korean Society for information Management
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• v.16 no.3
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• pp.31-48
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• 1999

This study examines the access points for electronic reference service system displayed on the home pages of academic libraries. Library home pages of national/public and private universities were examined, and these were classified into three groups according to the methods of displaying access points on the homepages. The advantages and disadvantages of each group were discussed and some suggestions were made for the user-friendliness and accessibility for the electronic reference service.

• Journal of Communications and Networks
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• v.15 no.1
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• pp.61-70
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• 2013

The increasing number of mobile users and the popularity of real-time applications make wired-wireless integrated network extremely attractive. In this case, quality of service (QoS) adaptability is particularly important since some important features of the integrated network call for QoS adaptability, such as mobility, bursty applications and so on. Traditional QoS schemes include integrated service (IntServ) and differentiated service (DiffSev) as well as their variants. However, they are not able to balance well between scalability and QoS granularity. For example, IntServ faces the scalability problem, while DiffServ can only provide coarse granular QoS. In addition, they are also unable to efficiently support QoS adaptability. Therefore, a per-packet differentiated queueing service (DQS) was proposed. DQS was originally proposed to balance between scalability and QoS granularity in wired networks and then extended to wireless networks. This paper mainly discusses how to use DQS to support QoS adaptability in wired-wireless integrated networks. To this end, we propose a scheme to determine dynamic delay bounds, which is the key step to implement DQS to support QoS adaptability. Simulation studies along with some discussions are further conducted to investigate the QoS adaptability of the proposed scheme, especially in terms of its support of QoS adaptability to mobility and to bursty real-time applications.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.2
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• pp.255-261
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• 2013

On the study of latest internet based video service diffusion of global broadcasting market. Code cutting of Pay broadcasting user because of Crisis of the pay market. On the other hand OTT(Over-The Top) service growth is pay-TV competitors. Accordingly this study perceived ease of use, perceived usefulness and satisfaction for analysis of internet based video service user. Analysis centered of correlation, regression that perceived ease of use, perceived usefulness and satisfaction.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.2
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• pp.203-210
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• 2015

The ecological environment monitoring system configured with Sensor Node, Gateway, Service Platform, and Web Browser. In this paper, we designed gateway resource tree and service function to do handling in the ecological environment monitoring service. Gateway Service Function based on oneM2M Common Service Function, Gateway Resource Tree configured with Application Part handling Sensor Data and Gateway link handling. lastly Device Registration, Sensing, Control, Profile Management.

• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.1-10
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• 2012

Today, As the internet and electronic publishing technology was powerful and there are many benefits to using various academic information which has an electronic document of high quality. Many researchers had much required to see a full-text of electronic document. There was an requirement of digital achieving activities between countries for each other electronic document in order to safely preserve and services. In this paper, we have implemented an electronic document local-hosting system to provide free service to KESLI member institutions and provide pay-per-view service to individual users and small/medium size companies who are not member of KESLI and builded national long-term preservation system of electronic information resources.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.30
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• pp.27-58
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• 2006

The purpose of this study is to identify key obstacles to the adoption of electronic bill of lading and to suggest an effective way to promote the utilization of electronic bill of lading in international trade field. This study finds that all the respondants have not used 'true' electronic bill of lading that is issued and distributed electronically, and most of them agreed the needs of e-B/L adoption, but their intentions to adopt e-B/L remain very low in the present situation. Five obstacles to the adoption of e-B/L were derived from an explanatory factor analysis: 'integration' factor, 'law institution' factor, 'usability' factor, 'economic efficiency' factor, and 'security' factor. Solutions to promote the utilization of e-B/L in international trade field are as follows; Firstly, to endow e-B/L with the legal force through amending relevant laws including the commercial law. Secondly, to conclude the relevant international agreement, and to carry out joint projects between nations are needed. Thirdly, to conduct publicity campaigns is required to increase the understanding of the concepts and benefits of e-B/L to all concerned parties. Fourthly, stable and reliable system must be constructed with high level security. Fifthly, to readjust the service fee of e-B/L system to a realistic level is to be needed in order for user companies to use e-B/L service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.7
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• pp.1638-1656
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• 2013

The demand for multimedia streaming services is increasing rapidly. To meet this demand, there has been much research and many practical developments for providing multimedia services. A push-to-talk (PTT) service is one of the multimedia streaming services that have been deployed not only over IP multimedia subsystem (IMS) but also in peer-to-peer (P2P) overlay networks. The benefit of PTT has been demonstrated in the literature. However, the need for using PTT service in communication can be arbitrary among users, regardless what kind of PTT services they use. This demand does not support current PTT systems, so an expansion of PTT services still be limited. Moreover, the combination of PTT services in IMS and P2P networks will help operators to provide more scalable PTT services. Therefore, in this paper, we proposed a model to support PTT service interworking between IMS and P2P overlay networks. We also introduced our system design and some interworking service scenarios. We confirmed our architecture through implementation and testing.

• Journal of Korean Society of Archives and Records Management
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• v.6 no.1
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• pp.113-136
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• 2006

This study aims for the above mentioned. After all, through the analysis of Electronic Question/Answering Function to understand a user's demand under online circumstances, groping for the method to provide an appropriate Archival Information Service is the most important thing. For this, in this study, it researched the users interviews and the research related to users as a precedence study, and the studies having examined the state of demanding information by users through analyzing the e-mail actually. Additionally, by looking over the study of Library and Information Science that is activated in a field of Electronic Question/Answering Function rather than Archival Science, as a matter of fact, the study has come up with the standard for analyzing Electronic Question/Answering Function. And based on the precedence study, the instances for the National Archives from USA, England, Australia and Canada were analyzed, and the chance of activating Archival Information Service were tried to grope for in the study. This study might be one of methodologies in examining the users study that is not activated yet in Archival Science. Therefore, the users study can be carried out in various methods as well as Electronic Archives/Answering Service. This study might be the important information in providing far better Archival Information Services. It is desirable that based on this opportunity, the study related to the various users by examining not only Electronic Archives/Answering Function but also Question/Answering of the users and the Archivists in the filed to the larger extend will be activated for Archival Science.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.11
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• pp.1076-1080
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• 2010

EPCglobal Network is based on the Electronic Product Code(EPC) and rapidly opening up to many enterprises that have close relationships with each other. Since a huge amount of logistics Information is distributed in the EPCglobal Network, it needs to manage them effectively. Global logistics companies and institutes are studying and setting up the standards about EPC Information Service(EPCIS), Object Name Service (ONS) and EPC Discovery Service(EPCDS) in the RFID and EPC-based logistics information network. In this paper, we propose expanded EPCIS and EPCDS that are satisfy EPCglobal standards and enable more effective logistics information management.