• Title/Summary/Keyword: Service line

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Speed Up Test on conventional Line by using Korean High Speed Train(HSR-350x) (한국형 고속 전철을 활용한 기존선 속도향상 고찰)

  • Kim Ki-Hwan;Park Choon-Soo;Kim Seok-Won
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.334-338
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    • 2004
  • KTX has started commercial service from Seoul to Busan and Mokpo since April 1, 2004. The service line is composed of new-high speed line and conventional line. Before KTX is runs, the maximum operational speed on conventional line was 140km/h. In order to reduce the traveling time, operation speed of KTX must be increased on the conventional line. So, we performed test running with prototype HSR-350x and verification of safety was made in $10\%$ speed-up. Korean High Speed Train HSR-350x) was developed by G7 - R&D project. In this study, in safety aspect, several technical reviews are introduced and the possibility for reduction of traveling time is investigated on the conventional line by using HSR-350x.

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An Optimizing Simulation for Designing the Numbers of Electric Train Car (전동열차 편성량수 설계를 위한 최적화 시뮬레이션)

  • Kim, Ick-Hee;Yun, Dong-Hee;Kum, Ki-Jung;Lee, Sang-Myoung
    • Journal of Korean Society of Transportation
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    • v.30 no.3
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    • pp.95-106
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    • 2012
  • The railway service in the Seoul metropolitan area is facing variety of l changes such as extension of service coverage, new construction, and introduction of express service which in turn causes changes on demands. The demand affects train operation characteristics (frequency of service, train formation) as well as on the congestion rate which is one of the major evaluation index in metropolitan area user service. For the efficient operation of the train, the relationship among the minimization of fleet number, operating cost, and service level has been analyzed. Using the Powersim, which is a system dynamics (System Dynamics) simulation program for realizing optimized simulation for train-formation, this paper identified that some stations of Gyeong-bu line exceeded limit congestion rate(150%) of a fleet already that means it is best to maintain current condition of the line; however, the Gyeong-in line and the Gwa-chon line showed no excess of the limit congestion rate so that it is possible to reduce 2-4 fleets of train for efficient operation. In addition, in case of Jang-hang line between Cheon-an and Sin-chang, a train consisting of 10 fleets provides services which is same formation of train for Gyeong-bu line. This study proved that the congestion rate will not rise greatly with only 4 fleets of a train for the service in Jang-hang line, and it is considered that a study for shuttle service between Cheon-an and Sin-chang is necessary.

Dynamic Web Page Personalization Using Intimacy Theory (친밀도 이론을 이용한 웹 페이지의 동적 개인화)

  • Kim, Jin-Hwa;Byun, Hyun-Soo
    • Asia pacific journal of information systems
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    • v.14 no.4
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    • pp.147-162
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    • 2004
  • A major difference between on-line services and off-line services is in the quality of the service they provide. On-line services lack of dynamic interface between customers and service providers. Traditional studies on personalizing web services do not consider the intimacy level of customers to web services. This study suggests a web personalizing method to satisfy customers in on-line using intimacy theory, cluster analysis, and data mining. The goal of this study is to support customers in web with more intimate service. It also offers improved services to customers by personalizing web services dynamically.

The Study of Multi-Circuit Breaker Coordination in the Underground Distribution Line (지중배전선로의 다회로차단기 운영방안 연구)

  • Jo, Nam-Hun;Ha, Bok-Nam;Lee, Heung-Ho
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.49 no.4
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    • pp.143-151
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    • 2000
  • Electric power distribution feeders are susceptible to faults caused by a variety of situations such as adverse weather conditions, tree contacts, equipment failure, accidents, etc. Distribution circuit faults result in a number of problems related to the reliability of service and customer power quality. In the distribution line, the permanent interruption of customer service resulting from a blown fuse or a recloser lockout was the only factor which was used to determine service reliability. On underground distribution line, the serving of cables by earth-moving equipment is a prevalent cause of faults and the most cable faults quickly develop into bolted current. we introduce th multi-circuit breaker coordination methods in the Underground Distribution Line.

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A Model Driven Architecture and Product Line Engineering Technique for Adaptable Contents Service of Ubiquitous Computing : Applying to Vessel U-Safety Monitoring (유비쿼터스 환경에서 적응적 컨텐츠 서비스를 위한 모델기반 아키텍처와 프로덕트라인 기법 : 선발 U-안전모니터링 시스템응용)

  • Lee, Seo-Jeong;Choi, Mi-Sook
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.4
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    • pp.611-617
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    • 2008
  • In ubiquitous environments, the content adaptable services can be dynamically provided to adapt the frequent changes of contexts. These services have common things that the kinds of context factors are limited to ubiquitous environment, though the contexts are flexible. To reuse service architecture can be reasonable for effective adaptable service. In this paper, we design a software architecture with product line techniques for content adaptable applications in ubiquitous environment. Description of product line is to define variation points and their variants, to find out the dependencies between them and to keep the model based architecture, their alternatives.

The Promotion for the system refurbishment technique by the signalling system interoperability (신호시스템 병행운전 구성을 이용한 시스템 개량 기술 제고)

  • Kho, Young-Whan;Choi, Jong-Ki
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.1448-1453
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    • 2006
  • The Seoul Metro Line No.1 is a very complex service line which carries over 620 thousand passengers a day as a linked line to the satellites of the Seoul Metropolitan. Since the Line No.1 had its voyage service in 1974. it has been aged by the time, which resulted in the needs for the refurbishment to the new system, and as its system refurbishment was suggested to be implemented without any stop of the service, the signaling system interoperability was planned for this refurbishment, and finally it became a desirable reference of the metro signaling system overall refurbishment

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The Study on the Relationship of Logistics Service Quality, Relationship Orientation, and Customer Satisfaction for the Repurchase Intention in On-Line Shopping Mall (온라인쇼핑몰 환경에서 물류서비스품질, 고객만족, 관계지향성이 재구매의도에 영향을 미치는 관계에 관한 연구)

  • Kim, Do-Goan;Ryu, Il
    • Journal of the Korea Society of Computer and Information
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    • v.13 no.2
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    • pp.251-258
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    • 2008
  • The purpose of this study is to examine the structural relationship among logistics service quality, relationship-orientation for on-line shopping malls, customer satisfaction and repurchase intention in on-line shopping malls. Based on extensive review of relevant literature, nine components of logistics service quality and six components of relationship orientation are introduced in this study. And a conceptual model is developed and four research hypotheses are empirically examined using structural equation modeling. The findings indicate that logistics service quality is positively and significantly associated with customer satisfaction, and relationship- orientation is the antecedent variable of repurchase intention in the on-line shopping mall. In conclusion, it is revealed that logistics service quality and relationship-orientation play a major role in the success of on-line shopping mall.

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A Study on the Efficiency Analysis of Global Line Service (글로벌선사의 운영성과 향상을 위한 항로의 효율성 분석)

  • Shin, Chnag-Hoon;Choi, Min-Seung;Song, Jae-Young
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.29 no.1
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    • pp.473-478
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    • 2005
  • This paper presents a approach to the measurement of efficiency which is trunk route of global liner. Data evelopment analysis(DEA), as it is called, has particular applicability in the service sector. Applying mathematical programming techniques, DEA enables relative efficiency ratings to be derived within a set of analysed units(line services). This paper investigates the efficiency employing DEA Model of line service classified into route(ex. America-asia line, Europe-asia line, Pendulum line etc). Result of this paper, suggests to some plan for improving the performance in the side of operating global liner.

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A New Algorithm of The Line to Ground Fault Section Isolation & Restoration in Ungrounded Distribution Power System (비접지 배전 계통에서 지락사고 시 고장구간 분리 및 복구를 위한 새로운 알고리즘)

  • Choi In. S.;Choi Myeon. S.;Lim Seong. I.;Lee Seung. J.
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.10
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    • pp.550-555
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    • 2004
  • Fault section isolation and service restoration are very important for function of DAS. In Japan, a progressive protection method is used for the line to ground fault section isolation and service restoration. But the progressive protection method has a drawback that the customer will experience outage time and that the rate in use of the feeder is not over 50%. This paper presents a new Service Restoration Algorithm which is for the line to ground fault section isolation and service restoration method for a ungrounded distribution system. If the proposed algorithm is used, the rate in use of the feeder can improve than before because a distribution system can change multi connection of feeder and the customer's outage time can be reduced. The proposed algorithm has been successfully tested in a distribution system.

Differentiated impacts of SNSs on Participatory Social Capital in Korea

  • Hwang, Dukyun;Paek, Mi Yon
    • International Journal of Internet, Broadcasting and Communication
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    • v.8 no.3
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    • pp.1-11
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    • 2016
  • This study investigates whether different SNS with different characteristics have different impacts on participatory social capital in Korea. At least in Korea, SNS are categorized into five types (community, blog, micro-blog, profile-based service and instant message service), and participatory social capital is specified by three types (off-line political participation, on-line political participation, on-line civic engagement). Using Nielsen KoreanClick's web-based survey data, our regression analysis shows that SNS which are more open and focused on information sharing contribute more to participatory social capital.