• Journal of the Korean Society for information Management
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• v.27 no.2
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• pp.173-199
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• 2010

The purpose of this study was to select the evaluation criteria for the physical spaces of a children's library in an effort to back up children's development in a more positive and constructive manner, as the physical spaces of a children's library are likely to affect their development. Theories of children's developmental characteristics were reviewed, and user benefit criteria were analyzed, which were the basis of the spatial conditions to facilitate their development in consideration of the developmental characteristics of different stages and domains. And then conceptual words that corresponded to the concept of benefit and commonly appeared in earlier studies of children's libraries and children's spaces were selected to embody the concept of benefit. 12 conceptual words were presented as corresponding words of benefit, out of which the majority were selected from among the previously selected words and some were added by this researcher. Several libraries were reviewed by the 12 standards, and a spatial criteria checklist for a children's library that focused on benefits provided to growing children was provided.

• Journal of Korean Library and Information Science Society
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• v.43 no.1
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• pp.261-285
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• 2012

The purpose of this study is to confirm that the user benefit criteria can be applied as the user benefit criteria of children's libraries by examining the theoretical validity of the user benefit criteria and furthermore, by clarifying and verifying the mutual relation between the user benefit criteria and the child development area. For such a purpose, this study collected data from 247 users of children's libraries in the country and collected data was analyzed using the structural equation modeling. The result of analysis is as follows. First, the relation between physical development and behavioral facilitation, emotional development and physiological maintenance, cognitive development and perceptual maintenance, and the development of social skills and social facilitation was appropriate. Second, usability, safety and diversity was valid as an index of behavioral facilitation, self-esteem, amenity and peacefulness was valid as an index of physiological maintenance, esthetic sense, dynamics and flexibility was valid as an index of perceptual maintenance, and leisure, communication and territoriality was valid as an index of social facilitation. Third, children who prefer physical development prefer the benefit of behavioral facilitation, children who prefer emotional development prefer the benefit of physiological maintenance, children who prefer cognitive development prefer the benefit of perceptual maintenance and children who prefer the development of social skills prefer the benefit of social facilitation.

• Journal of Korean Society of Transportation
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• v.25 no.6
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• pp.19-31
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• 2007

When estimating the benefits from an investment project in the transportation sector, errors caused by many factors may exist. This study focuses on user equilibrium traffic assignment methods and stopping criteria. According to previous studies, when using a user equilibrium assignment model, the benefits of travel time savings can be effected by the relative gap value. As the stopping criteria decreases, the time needed for traffic assignment increases, so that lowering the criteria cannot be the best solution. Therefore, an effort is necessary to reduce this change rate and thus improve reliability. This paper considers three methods: reducing the links subject to benefit calculation, extracting sub-area O/D tables and networks, and applying the mean value of successive traffic assignment results. The results of the analysis show that the method using the mean value of five results is more proper than the other methods. Using the sub-area analysis method, if the study area is small the benefits of a project might be over- or under-estimated. This paper used a nationwide O/D table and network at peak time as a case study. The resulting patterns can differ according to basic data to be used in analysis. So further analysis using the data from metropolitan areas are needed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.1D
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• pp.41-47
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• 2006

The construction of traffic facilities has generated a variety of problems in the equality and efficiency when it would be planed and evaluated. One of the reasons for these phenomena isn't the definition of an objective standard about benefit items. Thus, results of evaluation couldn't give a demonstration of confidence. But, the traffic facility construction and its operation costs are securely appeared. Therefor, it will be demonstrated to decide the benefit items in this study. Before deciding the items, user's satisfaction evaluation and economic analysis would be carried. We find out subway user's satisfaction higher than load traffic mode user in satisfaction evaluation, while subway's economic feasibility is lower than load facility, as a result of B/C analysis. In this inconsistent results, we found out that the benefit value is a little lower because of indefinite standard of it's items as comparing Busan Metropolitan City's population with subway's modal split ratio. Accordingly, we enumerate some benefit items in the case of feasibility evaluation as constructing traffic facility. And each of evaluation items' weight is estimated by using ANP. We found out that the weight value of accessibility has the highest one, that of punctuality has second, that of travel time has third, and benefit items according to improvement of user's traffic condition have much more important than those which were considered in the existence economic analysis.

• Journal of Korean Library and Information Science Society
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• v.32 no.4
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• pp.419-447
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• 2001

This study is to analyze a cost-benefit and a cost-effectiveness on the basis of number full-text downloaded from IDEAL in the electronic journals consortium of Y University Library during 2000. The result of this study shows that Y University Library used more the combined print and electronic journals than only electronic journals, and in the case of the analysis on the cost-benefit, there was no benefit, but the cost-effectiveness was very high. Based upon the result of this study, it suggests that academic libraries request a trial from the information agency and carry out user instruction analysis of varied use statistics, user satisfaction survey so as to promote use of electronic journals.

• Electronics and Telecommunications Trends
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• v.15 no.2 s.62
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• pp.66-72
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• 2000

기술기준은 전파 이용질서를 확립하여 공공의 이익을 추구하는 데 목적이 있다. 본 고에서는 국가간의 상호인정(MRA) 추진으로 각국의 기술기준을 상호조화 시키는 세계적인 추세에 대응하기 위하여 국내 정보통신 기술기준에 대한 전반적인 재검토를 통하여 기술기준을 이용자 편익 및 권익을 보호할 수 있는 무선설비규칙의 개선 방향에 대하여 논의하고자 한다. 이러한 체계 개선을 통하여 국가의 경쟁력을 강화하고 향후 국제 통신시장에 국제적인 신뢰도를 높이는 데 기여할 수 있을 것이다.

• Information and Communications Magazine
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• v.30 no.7
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• pp.50-57
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• 2013

망관리성이란 다수의 이용자가 네트워크를 효율적으로 이용할 수 있도록 하기 위해 통신사업자가 네트워크를 합리적으로 관리할 수 있어야 한다는 것을 의미한다. 본고에서는 최근 증가하고 있는 대용량 비디오 트래픽에 대한 최적의 이용환경을 제공하고 망관리성을 제고하는 방안으로서 비디오 트래픽 대역폭 최적화 동향을 살펴보고 향후 방향을 제시하고자 한다. 비디오 트래픽 대역폭 최적화란 네트워크(3G/ LTE 등), 단말(휴대폰/태블릿 등), 콘텐츠(스포츠/드라마/영화 등) 유형별로 이용자의 동영상 품질 만족도와 네트워크 품질을 동시에 만족하는 최적 대역폭(비트레이트)의 비디오 트래픽을 전송하는 것이다. 비디오 트래픽 최적화에 있어서 최적대역폭 선정 기준의 정립은 다음과 같은 두 가지의 연구 결과를 기반으로 진행된다. 첫째, 일반적으로 동영상 대역폭이 증가할수록 영상 품질도 정비례로 증가할 것이라는 예상과는 달리, 무선 단말 이용자는 영상화질의 일정 임계치 이상에서 품질의 차이를 거의 느낄 수 없다. 둘째, 다량의 비디오 트래픽이 네트워크 총 대역폭의 일정 비율 이상을 차지하게 될 경우 네트워크 품질저하 요소가 발생하여 네트워크 품질이 급격히 악화된다. 비디오 트래픽 최적화는 이러한 요소를 고려하여 이용자의 영상 품질 만족도를 최대화하면서 네트워크 품질 유지비용을 최소화하고 트래픽 전송품질을 확보할 수 있는 최적대역폭을 설정하는 것이다. 비디오 트래픽 최적화의 목적은 트래픽을 통제하거나 차단하는 것이 아니며 최적대역폭에 대한 가이드라인을 제시하여 콘텐츠사업자(이하 CP)와 Over-The-Top 사업자(이하 OTT)가 자발적으로 준수하도록 유도하고자 하는 것이다. 비디오 트래픽 최적화는 ICT생태계 모든 이해관계자에게 편익을 제고할 것으로 기대된다. 첫째, 이용자에 대해서는 통신품질 안정화로 전체적인 이용자 만족도를 향상시킨다. 둘째, CP/OTT는 멀티미디어 서비스의 대중화와 서버 및 전송장비 비용을 절감할 수 있다. 마지막으로 통신사는 네트워크 품질저하 및 비용 급증을 방지할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.663-666
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• 2009

The usage of fixed call services and public payphones decreased due to the mobile services became general communications tools and the new VoIP services are emerging. Public phone services are included in the scope of universal services and the prices of services is low and the services are easy to access anywhere. However the telecommunication markets are changed then the loss of public payphone services gets worse and the importance of public payphone have decreased. This paper reviewed the universal services regulations of public payphones in overseas countries and proposed the implications of improving the universal service regulations for public payphones.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.20 no.2
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• pp.1-14
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• 2021

The exclusive bus lanes in the Yeongdong Expressway were implemented in the Singal to Yeoju section in 2017, but the capacity of both exclusive bus lanes and general-purpose lanes of the Yeongdong Expressway decreased and the travel time increased, reducing it to the Singal to Deokpyeong section. Therefore, it is necessary to increase the efficiency of exclusive bus lanes to revitalize public transportation and improve environmental problems. This study calculated the willingness to pay and the social benefits of permission for Green cars to drive on exclusive bus lanes in Yeongdong Expressway. A survey was conducted on two groups of Green car users and Expressway users, and the willingness to pay was estimated using the CVM method. As a result, the average WTP of Green car users were estimated to be 218.7(won/km·person), and that of Expressway users were estimated to be approximately 235.5(won/km·person). The direct benefits were estimated to be approximately 7.9 billion won for Green car users, and 8.5 billion won for Expressway users in 2019. Finally, the value of time saving was estimated to be approximately 8.0 billion won.

• Environmental and Resource Economics Review
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• v.15 no.4
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• pp.741-760
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• 2006

As a part of the 21st Century Frontier Projects, Korea is building a proton linear accelerator complex. Using the discrete choice conjoint analysis method, this study evaluates the complex. Multinomial logit model is employed as an econometric model and Hicks' compensating variation is adopted as a welfare measure. The results show that an average willingness-to-pay (WTP) of a would-be user measured by the compensating variation is estimated by 1.93 million Korean won per hour for the specification of the complex being built.