• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.325-327
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• 2009

This research seeks to investigate transfer passengers' service evaluations of an airport. Transfer passengers are important for many airlines and hub airports because the needs of transfer passengers are quite different from O&D passengers. Despite the increasing importance of transfer passengers for airport operations, little research has been done to analyze their needs toward airport services. The data are collected from Japanese and Chinese transfer passengers to investigate airport services at Incheon International Airport. Through the survey, this research investigates the effects of important airport service attributes on customer satisfaction and behavioral intentions.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.2
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• pp.127-137
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• 2015

Various services such as IPTV(Internet Protocol TV), Internet Telephony are provided through multiple ISPs(Internet Service Providers) as ICT technologies are evolving. This paper suggests that the end-to-end Internet service quality evaluation method, which is optimized for domestic environment based on international standards. The end-to-end service quality determines the quality of IPTV and Internet Telephony services and is critical factor for subjective quality as well. As a result, time delay, jitter and packet loss rate are three elements for the quality evaluation. It is also shown that these factors can be predicted with traditional statistical method by sharing minimum amount of information between ISPs.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.22 no.3
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• pp.173-188
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• 2011

This research intended to identify empirical recommendations for designing the DAISY service interface and used a case-based method. The case of this research was LG Digital Talking Book Library(http://voice.lg.or.kr) of LG Sangnam Library. A group of experts evaluated the current DAISY interface serviced by the web. After evaluation, major recommendations were suggested and these recommendations were used to develop the new DAISY Interface. Major recommendations were consideration of the reading flow of the screen-reader program, prevention of perception as an error about the time delay, development of web-based software, support for convenient functions and prevention of shortcut key overlap and so on.

• 한국상하수도협회지
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• s.12
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• pp.76-91
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• 2005

• Proceedings of the Technology Innovation Conference
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• 2009.02a
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• pp.295-310
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• 2009

휴대용멀티미디어플레이어(이하 PMP)는 2004년 국내에 등장하여 음악과 더불어 영화 및 동영상을 볼 수 있도록 해주고 있는 인기 있는 개인용 전자기기이다. 그러나 수요가 둔화되고, 업체들의 경쟁이 치열해지면서 새로운 기능, 새로운 서비스에 대한 개발이 대두되고 있다. 최근에는 네비게이션 서비스, 학습서비스가 시행되면서 다시 수요가 살아나는 추세이다. 이에 따라 현재 존속하는 서비스에 대한 평가 및 새로운 서비스에 대한 검증이 요망되고 있다. 본 연구에서는 소비자 니즈 조사를 분석함으로써 현재 이용되고 있는 서비스들의 상황을 분석하고, 신규 서비스에 대한 수요 가치를 분석하였다. 분석 대상이 된 기존 상용 서비스는 게임, DMB, 영화, 음악, 네비게이션, 전자사전, 전자책, 이러닝, 만화, 무선인터넷였고, 신규 서비스는 u-Commerce, u-Health, u-Security, u-Public였다. 본 연구결과 PMP 응용 수요선호도 순위는 영화, TV, 음악 순이었으며, 신규서비스 u-Commerce, u-Health, u-Security, u-Public 옵션들에 대한 구매의향 평균가는 68,102원으로 나타났다.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.05a
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• pp.133-133
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• 2001

무선 근거리 지역망(Wireless LAN;WLAN) 환경에서 다중 채널을 이용하여 실시간 서비스를 제공하기 위한 매체 접근제어 계층에서의 채널의 사용 구간 할당 방법을 제안하고, 컴퓨터 모의 실험을 통하여 제한된 방식의 실시간 서비스 지원 성능과 채널의 사용 효율을 분석한다. 제안한 채널 사용 구간 할당 방안은 개선된 매체 접근 제어 프로토콜 RICH-DP (Receiver-Initiated Channel-Hopping with Dual Polling)를 바탕으로 한다. 무선 환경에서 RTS-CTS를 사용하는 프로토콜은 SRMA, MACA, MACAW, IEEE 802.11, FAMA 등이 있다. 최근에 단일 채널을 환경에서 RICH(Receiver Initiated Channel-Mopping) 프로토콜이 제안되었다. RICH는 충돌 회피를 위해서 경쟁 구간에서 충돌 감지(carrier sensing)을 사용한다. RICH는 제한된 어플케이션에 국한되는 단절이 있다. 반면에 RICH-DP는 다중 채널 환경에서 충돌 감지와 특별한 코드(spreading code) 할당 없이 일반화된 충돌 회피를 제공한다. 실시간 서비스를 이용하자 차는 단말들로 하여금 RICH-DP를 사용하여 서비스를 제공할 때, 대역폭에 대한 정보를 AP(Access Point)로 전송토록 함으로써 비경쟁 구간에서 뿐 아니라, 경쟁구간에서도 높은 채널 효율이 얻어질 수 있도록 하고 있다. 제한된 방안의 성능 평가를 위한 모의 실험은 OPNET를 이용하여 실시간 서비스 데이터를 7개의 상태 천이를 갖는 VBR 소스로 모델링하고 비동기 트래픽들은 Poisson 소스로 모델링하여 실시간 서비스 단발들의 이용 대역폭과 채널 처리율과 시스템 지연시간을 성능 평가 인자로 하여 수행하였다. 논문에서 제한된 방법을 적용한 개선된 RICH-DP을 모의 실험을 통하여 분석한 결과 기존의 제한된 RICH-DP는 실시간 서비스에 대한 처리율이 낮아지며 서비스 시간이 보장되지 못했다. 따라서 실시간 서비스에 대한 새로운 제안된 기법을 제안하고 성능 평가한 결과 기존의 RICH-DP보다 성능이 향상됨을 확인 할 수 있었다.

• Journal of the Korean Society for information Management
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• v.32 no.4
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• pp.29-53
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• 2015

This study aims to measure the service quality of children's libraries using LibQUAL+ and to analyze the effect of service quality on users' satisfaction. To do that, a survey was conducted with 210 users in three children's libraries located in J city. In three service quality dimensions - 'Affect of Service', 'Information Control', and 'Library as Place' - the users' perceived service level was less than the minimum service level, which implies that the current services should be improved immediately. It was also found that 'Affect of Service' and 'Library as Place' influenced the users' satisfaction. Based on the statistical results and the content analysis of the users' comments about the library services, this study suggests recommendations for improving library services in the children's libraries.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.23 no.2
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• pp.271-294
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• 2012

This study is designed to evaluate the service quality of public libraries according to managing entities by LibQUAL+ and to devise ways to improve problems based on comparison and analysis of the differences in the service qualities. To achieve this, four public libraries in Seoul according to the managing entities were investigated. They consisted of libraries of public corporations, cultural centers, foundations and universities. Minimum service quality level, desired service quality level and perceived service quality was analyzed based on nine-point Lickertis scale. A survey was employed and consisted of twenty-two items. The results showed that current level of service met the minimum level, yet failed to reach their desired service level. The study suggested that public libraries contracting out to private sector need to actively apply users' demands and the changing environment of libraries, and continue to strive to provide public library users with high quality service through efforts of evaluating and improving the services for their users.

• Journal of Software Assessment and Valuation
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• v.17 no.1
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• pp.51-58
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• 2021

Microservices are not only developed independently, but can also be run and deployed independently, ensuring more flexible scaling and efficient collaboration in a cloud computing environment. This impact has led to a surge in migrating to microservices-oriented application environments in recent years. In order to introduce microservices, the problem of identifying microservice units in a single application built with a single architecture must first be solved. In this paper, we propose an algorithm-based approach to identify microservices from legacy systems. A graph is generated using the meta-information of the legacy code, and a microservice candidate is extracted by applying a clustering algorithm. Modularization quality is evaluated using metrics for the extracted microservice candidates. In addition, in order to validate the proposed method, candidate services are derived using codes of open software that are widely used for benchmarking, and the level of modularity is evaluated using metrics. It can be identified as a smaller unit of microservice, and as a result, the module quality has improved.

• 한국IT서비스학회:학술대회논문집
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• 2003.11a
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• pp.543-549
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• 2003

다속성 위험평가는 위협과 보안요구사항의 집합을 순위화해서 계량적으로 위험을 평가하는 유용한 체계를 제공해 준다. 본 논문의 목적은 위험을 파악해서 순위화 하는 과정을 다속성 위험평가에 의해서 분석하는 이론과 사례를 제시하는 것이다.