• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.1
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• pp.103-111
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• 2015

The purpose of this study is to estimate the appropriate Demand Responsive Transport (DRT) fare for bus users upon introduction of the system, which is to improve ridership on economically non-profitable routes and to conform to the mobility right of those living in presently non-serviced rural areas. For this, a stated preference (SP) survey was adopted to assess respondents' preferences regarding DRT introduction, while the contingent valuation method (CVM) was used to calculate their willingness to pay (WTP) for DRT services. The analysis results show that, compared to the existing bus services with a 1,000 won bus fare, the value of DRT is considered to be 38.85%, 31.03% and 30.12% higher in terms of overall assessment, usability and convenience, respectively. The results of this study are expected to facilitate the decision making aimed at setting the appropriate DRT fare and implementing a DRT system that meets sustainability requirements.

• Journal of the Korea Convergence Society
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• v.11 no.7
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• pp.281-287
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• 2020

The purpose of this study is to examine whether the effect of service satisfaction regarding the accessibility of child care services varies between dual-earner and single-earner families. In particular, we conducted the analysis by dividing the service accessibility into sub-areas. The study sample consisted of 267 parents living in Seoul and Gyeonggi region. As a result of the analysis, accommodation in use time and affordability influenced satisfaction in the single-earner families, and information acquisition and acceptability in the dual-earner families. For single-earner families, the more convenient the use time of the childcare institution and the less the service cost burden, the higher the satisfaction. The dual-earner families had higher satisfaction levels if it was easier to obtain information about the childcare centers and weaker the religious characteristics of the childcare centers. Based on the research results, it is necessary to differentiate the burden of cost and provide more flexible operation of childcare service operating hours. In addition, it is necessary to devise a policy method to increase the transparency of information to childcare institutions.

• Journal of Korean Society of Transportation
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• v.25 no.4
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• pp.57-66
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• 2007

According to the rapid economic growth and the escalation of recreational tourism activities due to the change of job and working patterns, currently various traffic problems often occur in tourist areas. As tourist traffic, contrary to general traffic, is not regional but rather from outside the area of interest, it is hard to grasp the traffic situation surrounding the tourist area. Furthermore, since the traffic is concentrated during a limited tourist season, it is difficult to examine and solve the problem. In this study, in order to test the feasibility of introducing a traffic transfer system to reduce congestion in tourist areas, the authors considered the differences in traffic congestion between typical and tourist seasons and designed a willingness to pay model. The willingness to pay amount for a shuttle bus fare is assumed as 1,430 Won and 1,650 Won is assumed for a transfer parking charge. These amounts were slightly above the current bus fare in the study area, but many people thought that the introduction of a traffic transfer system would help to relieve the traffic congestion approaching the tourist area and to develop tourism resources. As the willingness to pay appeared high from the persons used in this study, it was indirectly confirmed that the introduction of a traffic transfer system would be a step in the right direction.

• Environmental and Resource Economics Review
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• v.30 no.1
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• pp.1-26
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• 2021

This paper aims to examine economic values of green spaces for non-Capital areas that have been rarely studied. Choice experiments were applied to two dissimilar but adjoining areas: The City of Jeonju and Wanju County. Split-sample surveys allowed to compare between apartment dwellers and single- or multi-family house dwellers, and across differing types of green spaces. According to the results, significant and substantial preferences might prevail not only for large cities, but also for agricultural areas. The mean willingness-to-pay (WTP) values of apartment dwellers for the view of a river/lake or mountain were generally smaller than those of Seoul, while the overall access values showed the opposite relationships. House dwellers in Jeonju showed substantially larger economic values for green spaces than those of the counterparts in Seoul, except for the access value of a river/lake. The findings grant follow-up studies investigating the reasons for the anomalous preferences particularly in Jeonju and identifying new management policies for non-Capital areas.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.418-420
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• 1998

웹 전자상거래 이용이 증가함에 따라 기존의 2단계 방식의 클라이언트-서버 구조를 갖는 시스템은 네트워크 병목 현상이나 시스템 성능 저하, 시스템 확장문제 및 서버의 시스템 부하등의 문제가 유발되었다. 이와 같은 문제는 전자상거래와 같은 대규모의 클라이언트를 요구하는 환경에서 가장 큰 취약점으로 지적되고 있다. 또한 네트워크상의 가상기업, 가상시장 등 각 기업의 전자 상거래 구축을 위한 다양한 플랫폼이 개발됨에 따라 이들의 독자적인 플랫폼들간의 지불, 보안등의 상호 호환성을 해결하기 위해 CORBA IIOP(Internet Inter ORB Protocol)를 사용하는 추세에 있다. 이에 본 논문에서는 웹 기반 전자상거래를 CORBA를 이용하여 3계층 방식의 데이터베이스 접근방법으로 구현하였다. 이는 웹을 통해 고객이 주문한 상품은 CORBA 에이젼트의 서버 구현객체 호출을 통해 데이터베이스에 저장되면, 전자우편을 통하여 관리자에게 통보하여 주는 기능 가지고 있다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.10a
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• pp.394-398
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• 2005

이동전화와 초고속인터넷을 중심으로 급격한 성장을 나타냈던 국내 통신서비스 시장은 최근 몇 년 동안 정체 상태를 나타내고 있다. 정보통신강국을 기치로 내걸고 강력한 드라이브를 걸고 있는 정부 입장에서나 당장 사업성과와 직결되어 있는 통신사업자의 입장에서는 통신서비스 시장이 장기적인 침체현상을 나타내는 원인을 규명해 내야할 필요성이 증가하고 있다. 이는 원인규명을 통해서만 이에 대한 해결책의 마련을 통해 새로운 돌파구의 마련과 성장의 동력을 개발할 수 있기 때문이다. 이에 본 논문에서는 가계소득과 가계지출의 추이 및 가계지출 구성항목의 비율 변화 등에 대한 분석을 통해 소비자들의 통신비 지급여력을 분석하고, 신규로 제공되는 서비스의 속성과 지불의사 등을 기준으로 통신비가 증가할 여지가 있는지를 분석하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06d
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• pp.32-36
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• 2008

최근 인터넷을 이용한 전자상거래(e-commerce)가 확산되면서 많은 편의를 제공하고 있다. 하지만, 인터넷을 통한 거래는 개인정보의 유출이나 주문 및 지불 정보의 유출 등의 취약점들에 대한 보안상의 요구를 만족하면서도 사용자들이 접근하기 쉽고 사용하기 편리해야 한다는 점에서 이중적인 어려움을 가지고 있다. 본 논문에서는 현재 전자상거래에서 사용되고 있는 보안 프로토콜들의 문제점들을 분석하고 이를 보완한 새로운 보안 프로토콜을 제안한다. 그리고 제안된 프로토콜을 정형검증 툴인 AVISPA를 이용하여 명세 및 검증함으로써 안전성을 검증한다.

• 한국벤처창업학회:학술대회논문집
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• 2018.04a
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• pp.27-30
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• 2018

디지털 음원 시장을 양분하는 가장 대표적 디지털 음원 소비방식은 다운로드(download)와 스트리밍(streaming)이다. 음원 스트리밍 시장은 IT 기술의 발전으로 빠른 성장을 거듭하여 스트리밍 이용 수가 급격히 증가한 반면, 다운로드 수는 감소하는 추세를 보이고 있어 음원 소비 방식이 소유방식에서 접근방식으로 변화중이라고 할 수 있다. 스포티파이(Spotify)와 같은 음원 스트리밍 기업이 프리미엄(Freemium) 가격정책을 운용하는 반면, 국내 음원 스트리밍 기업은 정액요금제 가격정책을 주로 채택하고 있다. 정액요금제 가격정책을 채택한 기업의 수입은 소비자가 매달 지불하는 일정한 금액으로 고정되어 있지만, 비용은 징수규정에 따라 소비자가 스트리밍을 하는 횟수에 비례하여 증가하기 때문에 변동성이 있다. 서비스를 열성적으로 이용하는 소비자가 추가 구매를 할 가능성이 높은 다른 비즈니스에 비해, 정액제로 운영되는 음원 스트리밍 비즈니스는 사실상 추가 구매가 이뤄지는 경우가 드물기 때문에 음원 이용 건수가 많은 소비자가 기업의 높은 가치를 주는(high-value) 고객이 아닐 수 있다. 따라서 본 연구는 스트리밍 정액요금제 소비자를 음원 소비량에 따라 세분화(segmentation)하고 이들의 특성을 살펴봄으로써, 음원 스트리밍 기업과 연구자에게 효과적인 전략을 세우는 데 도움을 주는 것을 목표로 한다.

• Environmental and Resource Economics Review
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• v.30 no.3
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• pp.395-433
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• 2021

This paper aims to examine the effects of homeownership and residential types on the economic values of urban green spaces. Green open spaces as public goods provide positive externalities that are comprised of pecuniary and technological externalities. Seoul, South Korea, is used as a case study using choice experiments, with split-sample online respondents of 1,000. The study results evidenced that the differentiation between the two types of externalities is imperative for equitable provisions and efficient management of various urban open spaces. There is a positively significant and substantial impact of homeownership for apartment dwellers, ceteris paribus, but not for house dwellers. For apartments, the efficiency loss can be reduced by increasing green spaces up to the critical point where the marginal cost is at equilibrium with tenants' marginal values. For non-apartment houses, it is not homeownership but the monthly household income that has a significant impact on the amenity value. In general, public benefits from green spaces are equivalent to 16% to 33% of the current residential prices on average for a view or access. Different residential types do not cause a significant impact on the access values. Residential profiles for green spaces were developed, together with tailor-made policy suggestions.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.1
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• pp.131-139
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• 2012

The cloud storage has the client lend and use the device as a form of service rather than owning it, and thus the client pays the charge for the service that he or she actually uses, making it beneficial over the self-managed data center. When the storage service is provided on public cloud, however, the clients does not have any control over the user data, which brings a problem of violating data confidentiality. In this paper, we propose a gateway that works between the public cloud and the client for the purpose of guaranteeing the confidentiality of user data stored in cloud. The gateway encrypts or decrypts, and then delivers the user data without the client's intervention. In addition, it provides the function of exchanging keys to allow the client to access through another gateway. The proposed idea has been tested on a commercial public cloud and verified to satisfy security and compatibility.