• 한국멀티미디어학회지
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• 제12권4호
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• pp.28-40
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• 2008

Vehicular ad hoc networks (VANETs) are a practical application class of wireless ad hoc networks, which consist of moving vehicles equipped with radio communication capabilities that collaborate to form a temporary network. This paper addresses issues and protocols of multihop routing in such emerging networks in the context of safety and infotainment applications. Due to the highly dynamic mobility of vehicles, frequent link breakage and short connection time are inevitable and, thus, the routing is a challenging task and interest for many researchers and industrial community. The frequent and dynamic change of topology makes the topology-based routing unreliable but the position-based routing more effective. The position-based routing consists of the location service which maps a node id to a geo-graphical position and the forwarding scheme which selects the next hop based on geo-graphical information of the node, its neighbors and the destination. The routing techniques are further categorized into geographical forwarding, trajectory forwarding and opportunistic forwarding based on the forwarding scheme. In this paper, we first present the distinguished properties of VANETs and the challenges and intractable issues posed in designing the routing protocols, followed by the comprehensive survey of existing routing protocols. Then, the different routing protocols designed for VANETs are compared in terms of characteristics, performance and application domains.

• 한국IT서비스학회지
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• 제22권4호
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• pp.53-80
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• 2023

Expectations for artificial intelligence technology are increasing, and its utility value is growing, leading to active use in the public sector. The use of artificial intelligence technology in the public sector has a positive impact on aspects such as improving public work efficiency and service quality, enhancing transparency and reliability, and contributing to the development of technology and industries. For these reasons, major countries including Korea are actively developing and using artificial intelligence in the public sector. However, artificial intelligence also presents issues such as bias, inequality, and infringement of individuals' right to self-determination, which are evident even in its utilization in the public sector. Especially the use of artificial intelligence technology in the public sector has significant societal implications, as well as direct implications on limiting and infringing upon the rights of citizens. Therefore, careful consideration is necessary in the introduction and utilization of such technology. This paper comprehensively examines the legal issues that require consideration regarding the introduction of artificial intelligence in the public sector. Methodological discussions that can minimize the risks that may arise from artificial intelligence and maximize the utility of technology were proposed in each process and step of introduction.

• 방송공학회논문지
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• 제25권6호
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• pp.994-1003
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• 2020

본 연구에서는 뉴스 데이터를 이용해 재난문자의 문제점에 대해 알아보았다. 이를 위해 한국언론진흥재단 뉴스 빅데이터 시스템을 통해 2005년 5월 15일부터 2020년 4월 30일까지의 '재난문자'의 주제어가 포함된 뉴스를 검색하여 자료를 수집하였다. 분석방법은 내용분석을 사용하였다. 조사 결과에 따르면, 재난문자 수신 문제점은 경보음, 내용, 기준, 빈도, 속도, 수신범위, 시간, 언어 등에 대한 것으로 범주화되었다. 재난문자 미수신 문제점은 권한, 단말기, 발송기준, 통신, 기타 등에 대한 것으로 범주화되었다. 재난문자 문제점에 대한 뉴스 게재 추이를 살펴보면, 최근 2~3년간 미수신 문제점에 대한 뉴스는 줄어드는 반면에 수신 문제점에 대한 뉴스는 많아지는 것으로 나타났다. 이는 재난문자에 대한 국민의 개선 요구가 수신 부분에 있다는 것을 말해준다. 특히, 내용, 빈도, 수신범위 문제에 대한 사회적 해결 요구가 급증한 상황이다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 추계학술발표대회
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• pp.763-764
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• 2012

Web Services are considered to be a promising technology to add a new level of functionality to the existing World Wide Web. However, despite the growing use of Web Services by many organizations, there are several issues that are slowing their deployment such as service discovery, recovery from faults and security. In this paper, we give a detailed overview of issues surrounding Web Services, discuss existing solutions and describe their limitations.

• 보건의료산업학회지
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• 제4권2호
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• pp.107-117
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• 2010

In this paper, the researcher looked into major issues in the "Act (Draft) on Remedy for Damage from Medical Accident and Medical Dispute Mediation, etc." which was proposed by the Health & Welfare Committee, the National Assembly of the Republic of Korea, and which was pending with the Legislation & Judiciary Committee. Then the researcher pointed out worrisome problems therein and presented suggestion" to improve problematic situations. First of all, the researcher examined the following items which are major points in the aforementioned Act: 1) Establishment of Korea Medical Dispute Mediation and Arbitration Center, 2) Procedures for mediation and arbitration of medical disputes, 3) Establishment of Medical Injury Compensation Association, 4) Introduction of proxy payment for damages, 5) Compensation for no-fault medical accidents, 6) A system concerned with special cases on criminal punishment. Next, the researcher closely reviewed the following possible issues: 1) Limit of arbitrary mediation, 2) Postponement of the system concerned with special case on criminal punishment, 3) Examination of reasons for rejection, 4) Function and role of the Appraisal department, 5) A possibility of being reduced to an evidence collection procedure for lawsuit, 6) A possibility of no-fault compensation rather than injury compensation, 7) Operational issues related proxy payment for damages. Lastly, the researcher presented suggestions on how to improve each problematic issue.

• International Journal of Contents
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• 제6권3호
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• pp.47-52
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• 2010

This paper examines the casual relations among service quality, perceived value and satisfaction from the perspective of Job Fair attendees. Numerous studies have been conducted in the field of perceived value and satisfaction. This work would be the mere contribution in the literature development but surely contribute to the better development of service providing sector to create better quality, value and satisfaction. A framework suggested that personal service, touristic attractiveness and physical environments were turned out to affect positively on the perceived value and satisfaction. The service providers should concentrate on developing the issues.

• 대한지리학회지
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• 제28권2호
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• pp.123-136
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• 1993

본 연구는 정보통신기술의 발달에 의해 정보통신 서비스로 지칭되는 대표적인 기술혁신 중의 하나인 "하이텔 서비스"를 연구대상으로 하였다. 여기서는 광주시의 하이텔 서비스 이용자를 대상으로 하이텔 단말기의 확산과정에 나타난 공간적 특징과 서비스의 이용행태에 나타난 특징을 고찰하였다. 그 결과, 광주시 하이텔 단말기의 확산은 매우 제한적으로 이루어졌고 이용률 또한 매우 저조한 것으로 나타났으며, 이 밖에는 하이텔 서비스 확산을 위한 몇가지의 정책적 자료가 제시되었다.

• Journal of Information Processing Systems
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• 제6권2호
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• pp.129-146
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• 2010

The trend of Next Generation Networks' (NGN) evolution is towards providing multiple and multimedia services to users through ubiquitous networks. The aim of IP Multimedia Subsystem (IMS) is to integrate mobile communication networks and computer networks. The IMS plays an important role in NGN services, which can be achieved by heterogeneous networks and different access technologies. IMS can be used to manage all service related issues such as Quality of Service (QoS), Charging, Access Control, User and Services Management. Nowadays, internet technology is changing with each passing day. New technologies yield new impact to IMS. In this paper, we perform a survey of IMS and discuss the different impacts of new technologies on IMS such as P2P, SCIM, Web Service and its security issues.

• 경영과학
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• 제17권3호
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• pp.131-145
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• 2000

With the explosion of internet users, there are many enterprises and organizations that regard the internet as the great marketing superhighway. Although fascination and speculation surrounds the impact of the cyber shopping mall on consumer shopping behavior, there is little empirical evidence underlying all this speculation. This article reports on the critical issues that consumers found salient as they browsed through cyber shopping malls. We gathered consumers’reactions via open-ended survey. We relate the reactions to the factors of tangibility, assurance, responsibility, empathy, and reliability which we had identified from the existing literature on service quality. Two additional questionnaires were administered to translate these factors to the cyber shopping mall context and to explore their relative salience. We also evaluated SERVQUAL and SERVPERF as service quality measures for cyber shopping malls. The results show that SERVPERF seems more promising than SERVQUAL. The results also suggest that cyber shopping mall merchants need to think more about how they perform on the issues known to affect customers’decision making for purchasing. We offer advice for enhancing the design of cyber shopping mall.

• 경영과학
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• 제23권3호
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• pp.133-156
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• 2006

The ubiquitous technology, leading the stream of change in telecommunication market, makes VoIP a foundation technology to enter NGN era. With this trend in mind, VoIP providers try to satisfy customer needs and invest on R&D in order to survive in this emerging market. The critical issues to VoIP providers are two fold the first one is to find out the quality attributes of Internet telephony service; and the second one is to assess the impact they have on customer satisfaction, customer loyalty and customer performance. In this study, we attempt to empirically answer the above two issues employing SEM (structural equation modeling) and AHP (analytic hierarchy process), and suggest strategic guidelines for successful deployment of Internet telephony service.