• 교통기술과정책
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• 제9권5호
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• pp.68-75
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• 2012

• 교통기술과정책
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• 제6권3호
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• pp.201-204
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• 2009

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2014년도 제49차 동계학술대회논문집 22권1호
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• pp.125-126
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• 2014

센서 스트림 데이터는 센서 네트워크를 통해 수집되는 데이터로 실시간 처리를 요구하며, 연속적으로 끊임없이 발생하는 스트림 데이터이다. 이러한 스트림 데이터는 양이 방대하여 이를 저장하기가 매우 어려우며, 동시에 데이터를 검색하는 데에는 많은 시간이 소요된다. 본 논문에서는 센서 네트워크에서의 효율적인 스트림 데이터 처리 시스템을 제안한다. 이 시스템은 캐시테이블을 사용함으로써 데이터베이스에 최소화된 접근으로 데이터 스트림 관리 시스템의 성능을 개선하였다. 그리고 센서 네트워크에서 읽어 들여온 불완전 데이터를 효율적으로 정제하고 상위 단계로 전송한다.

• 전기학회논문지
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• 제64권10호
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• pp.1517-1522
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• 2015

Since electric railroad vehicle pass through repeatedly on the railroad bridge, the dynamic load that causes the change of tension of contact wire affect it constantly. In this paper, we measured the dynamic displacement of the railroad bridges to analyze the effect of tension in the catenary. A result of dynamic measurement of the longitudinal displacement, it's maximum value was 39.9mm which was lower than the primary management criteria 378mm. Also on the based of a maximum temperature, it shows a feature that the longitudinal displacement value increased as temperature rise from April to October. In terms of behavior characteristics of a tensioning device, it was confirmed to be the value of 50mm stroke movement when the temperature changes ±5℃.

• 한국항만학회지
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• 제13권2호
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• pp.323-332
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• 1999

The bus should supply an equal service to the whole community as feeder trip. However the existing bus route can not supply an effective feeder service in spite of the changes in the latent demand by the variety of regional structural change. This study aimed to establish the concept which frames the bus operation and management to cope with the latent demand to the bus. This study tackled this evidence by analyzing the transportation problems in terms of the urban growth emphasizing the following issues ; First, the strategy to improve the bus operation Second the land use control appropriate for the public transportation network Third economical range to justify the bus operation Second, the land use control appropriate for the public transportation network Third, economical range to justify the bus operation Fourth, the allowance for the private transportation mode On the latter part, the difference on the bus operation was compared to determine the range within which the bus operation could be justified. This study would provide some implications to improve the management for bus operation and fundamental information to develop the bus operation system.

• Journal of Advanced Marine Engineering and Technology
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• 제34권8호
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• pp.1135-1144
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• 2010

유무선 통신기술이 접목된 정보통신 및 제어기술을 이용하는 첨단해양교통시설은 안전한 해양교통환경을 보장할 수 있는 혁신적인 해양교통시설이다. 표준화를 기반으로 개발되어진 기술들을 통합한 해양교통시설은 항로표지 시스템의 관리와 원격 모니터링 분야에 그 응용기반이 확대되어져 가고 있다. 이러한 해양교통시설의 환경적 변화를 고려하여 시스템 독립성, 유연성, 확장성 등을 제공하는 해양교통시설 통합관리 시스템에서의 미들웨어 개념을 정의하고, 미들웨어에 적용 가능한 기술들을 조사하였으며 이를 바탕으로 하여 소프트웨어 구조와 인터페이스를 구성하고 그 구현 방안을 연구하였다.

• 대한안전경영과학회지
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• 제11권4호
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• pp.201-211
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• 2009

The types and quantities of Hazmat and Hazmat transportation are gradually increasing, keeping pace with industrialization and urbanization. At present the safety management for Hazmat transportation only considers reducing accident probability, but even when an accident involving Hazmat-carrying vehicles occurs, that is not regarded as a Hazmat-related accident if the Hazmats do not leak out from the containers carrying them. Thus the methods to reduce risk (Risk=Probability$\times$Consequence) have to be developed by incorporating accident probability and consequence. By using Geographic Information System (GIS), a technical method is invented and is automatically able to evaluate the consequence by different types of Hazmat. Thus this study analyzed the degree of risk on the links classified by the Hazmat transport pathways. In order to mitigate the degree of risk, a method of 7-step risk management on Hazmat transportation in railway industries can be suggested. (1st step: building up GIS DB, 2nd step: calculating accident probability on each link, 3rd step: calculating consequence by Hazmat types, 4th step: determination of risk, 5th step: analysis of alternative plans for mitigating the risk, 6th: measure of effectiveness against each alternative, and 7th step: action plans to be weak probability and consequence by the range recommended from ALARP). In conclusion, those 7 steps are used as a standardization method of optimum transportation routing. And to increase the efficiency of optimum transportation routing, optional route can be revise by verification.

• 한국항해학회지
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• 제23권4호
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• pp.63-76
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• 1999

This paper aims at developing an integrated fleet management support system for industrial carriers who usually control the vessels of their own or on a time charter to minimize the cost of shipping their cargoes. The work is mainly concerned with the operational management problem of the fleet owned by a major oil company, a typical industrial carrier. The optimal fleet management problem for the major oil company can be divided into two phase problem. The front end corresponds to the production operation problem of the transportation of crude oil, the refinery operation, and the distribution of product oil to comply with the demand of the market. The back end is to tackle the fleet scheduling problem to meet the seaborne transportation demand derived from the front end. Relevant optimization models for each phase are proposed and described briefly. Then a user-friendly integrated fleet management support system is built based on the proposed optimization models for both ends under Windows environment. A case study reflecting the practices of fleet management problem for the major oil company is carried out by using the system.

• 한국산업정보학회논문지
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• 제26권3호
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• pp.59-69
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• 2021

글로벌 물류 기업은 경쟁력 있는 물류서비스를 제공하기 위해 물류시스템을 개발 및 도입하고 있으며, 특히, IT가 발달하고 모바일 기능이 보다 편리해짐에 따라 모바일 운송관리시스템(Transportation Management System : TMS)이 일반 택배 기사들이나 회사 내 사무직 관리자들도 쉽게 사용할 수 있도록 보다 편리한 시스템으로 도입되고 있다. 그러나 이러한 시스템의 성공여부는 이 시스템 개발자가 현장을 정확히 이해하고 현장에서 그 시스템을 사용하고 있는 사무 관리자와 택배기사들이 능동적으로 그 시스템을 이해하고 적극적으로 이용하는데 달렸다. 본 논문의 목적은 이 시스템을 이용하는 사용자의 태도를 중심으로 새로운 시스템 이용에 있어서 시스템 수용에 어느 특성이 영향을 미치는지를 알기 위함이며 이를 기술수용모델(Technology Acceptance Model : TAM)를 통하여 분석하였다. 분석 결과에 따르면 스마트폰이 대중화된 요즘에는 사용자들이 시스템 수용에 있어 용이성보다 유용성이 유의하다는 결론을 얻었다. 이에 따라 시스템 개발 시 용이성이 아닌 유용성에 중점적으로 관심을 가져야 한다는 시사점을 도출하였다.

• 한국항만학회지
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• 제8권1호
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• pp.3-15
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• 1994

Most of Cities are suffering from the traffic congestion problem with the vehicles increased. Especially, the City of Pusan is experiencing the severest traffic congestion with the lower read capacity and the higher travel demand than any other cities in the country. Thus, the purpose of this study was to grasp the conditions, review the problems and finally suggest the improvements which we faced at this time for the construction of the Urban Transportation System considered in Pusan area. Based upon the results, it was concluded that firstly the Urban Transportation System(UTS) in Pusan area should be constructed by the Public Transportation System in the center of the Public Transit Modes(i.e., bus and subway), secondly the Para-transit Modes(i.e., Light Rail Transit, LRT) introduced, and thirdly the Transportation Demand Management(TDM) implemented with the expansion of the transportation facilities if possible.