• Title/Summary/Keyword: Transportation

Search Result 15,063, Processing Time 0.16 seconds

Case Study on Tube Transportation Systems for Lunar Regolith Transportation System (튜브운송기술 사례연구를 통한 달 토양 운송시스템 적용방안)

  • Tak, Jun-Woo;Chang, Byung-Chul;Koo, Ja-Kyung;Kim, Jeong-Hyun;Lee, Tai-Sik
    • Proceedings of the KSR Conference
    • /
    • 2010.06a
    • /
    • pp.1951-1957
    • /
    • 2010
  • Study of Lunar exploration is progressed and manned lunar exploration is planned. In order to explore in Lunar, we need habitat to stay for a long time and system that mine, classify and transport materials. Lunar has dust that is very light-tiny. That is on the air for a long time so there are problems to adject transportation system such as vehicle. However, it can solve the problem to use pipe transportation system. This transportation system help materials move continually and is more effective than other transportation system such as train or vehicle. For those positive points, some experts studied about tube transportation systems. I introduce these system and find out factors that can be used in Lunar regolith transportation system. I suggest Lunar regolith transportation system, using the factors.

  • PDF

Multiobjective Transportation Infrastructure Development Problems on Dynamic Transportation Networks (화물수송체계의 평가와 개선을 위한 다목적 Programming모델)

  • 이금숙
    • Journal of Korean Society of Transportation
    • /
    • v.5 no.1
    • /
    • pp.47-58
    • /
    • 1987
  • A commodity distribution problem with intertemporal storage facilities and dynamic transportation networks is proposed. mathematical integer programming methods and multiobjective programming techniques are used in the model formulation. Dynamic characteristics of commodity distribution problems are taken into account in the model formulation. storage facility location problems and transportation link addition problems are incorporated into the intertemporal multicommodity distribution problem. The model is capable of generating the most efficient and rational commodity distribution system. Therefore it can be utilized to provided the most effective investment plan for the transportation infrastructure development as well as to evaluate the existing commodity distribution system. The model determines simultaneously the most efficient locations, sizes, and activity levels of storage facilities as well as new highway links. It is extended to multiobjective planning situations for the purpose of generating alternative investment plans in accordance to planning situations. sine the investment in transportation network improvement yields w\several external benefits for a regional economy, the induced benefit maximization objective is incorporated into the cost minimization objective. The multiobjective model generates explicitly the trade-off between cost savings and induced benefits of the investment in transportation network improvement.

  • PDF

A Studyon Implementation of TPBS (Transportation-planning Programming Budgeting System) (교통기획예산제도(TPBS) 도입방안에 관한 연구)

  • 김종민
    • Journal of Korean Society of Transportation
    • /
    • v.13 no.1
    • /
    • pp.153-165
    • /
    • 1995
  • The budget management in Korea is one-year budget system which is just following int he steps of last years budget plan. This system towards traditional item-by-item and restriction-centered budget system. The budget distribution without establishing and considering rational policy goals and directions have brought inefficient resource allocations. In order to promote the implementation of transportation planning, there are some alternatives like introduction of top-down planning system preparing for the provincial self-government era. In this study, the most efficient alternatives to promote the existing management system is referring by foreign countries transportation planning examples(BVWP system in Germany). First of all, mid-long term transportation and budget planning should be established and then make decisions of resource availability and allocation. In order to provide ration budget planning, introduction of Transportation Planning Programming Budget System(TPBS) has been judged as one of the method of unifying the sysematic transportation improvement planning and budgeting. All transporation planning and related activites can not be expressed in quantity and due to the limitation of excessive cost of analyzing transportation planning and ranking priority, here after, the continuous study to minimize the evaluation cost and introduction of TPBS should be done.

  • PDF

A Comparative Analysis of Operating Costs of Teleconferencing and Alternative Transportation Modes (화상회의와 교통체계 이용시 비용분석에 관한 연구)

  • 원제무;손기복
    • Journal of Korean Society of Transportation
    • /
    • v.11 no.2
    • /
    • pp.45-62
    • /
    • 1993
  • The major objective of this study is to analyze the differences between operating costs of teleconferencing and alternative transportation modes for the conference in major compaines. Alternative transportation modes include road, rail, and air transportation mode. A case study is conducted using the data gathered for Pohang Steel Coperations. The main results are: (1) the operating cost of the teleconferencing is cheaper than operating cost of transportation modes when the number of teleconferencing are over 12 frequencs, and the number of person are over 15. Results reveal that teleconferencing turns out to be effective means of conference. (2) the amount of differences of operating costs on teleconsferencing and transportation modes gets higher according to the time elapsed. In particular, when teleconferencing cost is compared to operating cost of road transportation, it is found that the cost saving of 2.75 billion won in year 2001 can be realized.

  • PDF

Hybrid Multiple Hub-and-Spoke Vehicle Routing Model for Hyundai Mobis Automotive Service Parts Transportation Planning (하이브리드 다중 Hub-and-Spoke 차량 경로 계획 모형 : 현대모비스 자동차 보수용 부품 사내 운송 계획 최적화를 중심으로)

  • Lee, Yong-Dae;Jeong, Hyun-Jong;Son, Young-Soo;Yoon, Chi-Whan
    • Korean Management Science Review
    • /
    • v.28 no.3
    • /
    • pp.1-13
    • /
    • 2011
  • Hub-and-spoke transportation network is a powerful and useful network structure that takes full advantage of economies of scale on routes between hubs. In recent studies, the network structure is extended to hybrid hub-andspoke that allows direct transportation between spokes. In this study, we considered more extended network structure which is called hybrid multiple hub-and-spoke that has multiple hubs and allows direct transportation between spokes. We developed a mathematical optimization model for automotive service parts transportation planning under hybrid multiple hub-and-spoke network structure. The model suggests a long-term transportation route planning and a short-term vehicle assignment planning. The model is verified by simulation and validated in real world application to Hyundai Mobis automotive service parts transportation planning. From the simulation result, the model reduced the transportation cost about 24.7%, the total distance about 6.8% and the CO2 emissions about 8.8%. In real world application for 6 months from July to December 2010, the model reduced the transportation cost about 9.1% by changing the long-term transportation route without daily vehicle assignment planning.

Bike Transportation Activation Policy through Carbon Emission Trading (탄소배출권 거래를 고려한 자전거 활성화 정책)

  • Choi, Jae Soon
    • International Journal of Highway Engineering
    • /
    • v.18 no.6
    • /
    • pp.1-10
    • /
    • 2016
  • OBJECTIVES : Currently, the market for carbon emissions trading has been increasing. In Korea, it is known that traffic mode rate in bike transportation is low. However, if bike transportation system is encouraged and the traffic mode rate is increased, it would be possible to reduce carbon emissions through the trading market. In this study, a practical policy to activate the bike transportation system in Korea will be proposed and verified. METHODS : Past studies regarding bike transportation system in international and domestic metropolitan cities were analyzed. Moreover, detailed reviews on recent carbon emissions trading market were performed. In particular, SWOT analysis on the bike transportation system in Korea and policy topology analysis were conducted. RESULTS : Based on the literature reviews and SWOT analysis, a new bike transportation policy was proposed. Several actual plans to adopt in Korea were proposed. In addition, a new bike transportation policy was analyzed using policy typology model, and a business model related to the cost of implementing the system and CERs were also proposed. CONCLUSIONS : It is concluded that the proposed bike transportation activation policy and several practical plans to connect CERs and a business model including bus, subway, T-money and bike riders to give some incentive were effective and reasonable. It is desired that this study will help Korea to get CERs through bike transportation activation in the future.

Transportation of KSLV-I FM unit 2 VEB Assembly (KSLV-I 발사2호기 VEB 조합체 이송)

  • Choi, Sang-Hyeon;Park, Jong-Chan;Won, You-Jin;Lee, Soo-Jin;Chung, Eui-Seung
    • Aerospace Engineering and Technology
    • /
    • v.10 no.1
    • /
    • pp.20-29
    • /
    • 2011
  • There are a lot of electrical and electronic components and pneumatic parts sensitive to vibration and shock in the VEB assembly which KARI directly transports among the KSLV-I upper stage transportation items. So, the special attention in the transportation is required. The transportation container with the apparatus for controlling environment was made in order to meet the requirements. The transportation tests using the engineering model were performed 4 times to verify the performance of the transportation container and to conform the transportation conditions(transportation velocity, route, etc.). In this document, the previous transportation history of the VEB assembly, the overview and the result of the KSLV-I FM unit 2 VEB assembly transportation are described.

Analysis of Tram Feeding System according to Train Diagram Change (열차운행 시격 변경에 따른 트램 급전계통 해석)

  • Kim, Dong-Man;Chang, Chin-Young;Kim, Jae-Moon;Kim, Yang-Su
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.4
    • /
    • pp.634-639
    • /
    • 2015
  • In order to understand phenomenon of the electric railway power feeding system in the construction planning step, analysis of the overall system including electric characteristic of electric railway power feeding system, train running characteristic and power consumption pattern and train operation plan and gradients of railroad and curve radius is required. This paper study the feeder system by analysis of comprehensive system according to train operation plans, line impedance, running characteristic of train, electrical properties of the feeder system. In order to understand phenomenon to the feeder system of tram exactly regarding export of the field railroad preceeding actively recently.

Design of a Logistics Decision Support System for Transportation Mode Selection considering Carbon Emission Cost (탄소배출비용을 고려한 물류의 최적 운송수단 의사결정 시스템 설계)

  • Song, Byung-Jun;Koo, Je-Kwon;Song, Sang-Hwa;Lee, Jong-Yun
    • The KIPS Transactions:PartD
    • /
    • v.18D no.5
    • /
    • pp.371-384
    • /
    • 2011
  • This paper considers logistics decision support system which deals with transportation mode selection considering transportation and carbon emission cost. Transportation and carbon emission costs vary with the choice of transportation modes and to become competitive companies need to find proper transportation modes for their logistics services. However, due to the restricted capacity of transportation modes, it is difficult to balance transportation and carbon emission costs when designing logistics network including transportation mode choice for each service. Therefore this paper aims to analyze the trade-off relationship between transportation and carbon emission cost in mode selection of intermodal transportation and to provide optimal green logistics strategy. In this paper, the logistics decision support system is designed based on mixed integer programming model. To understand the trade-off relationship of transportation and carbon emission cost, the system is tested with various scenarios including transportation of containers between Seoul and Busan. The analysis results show that, even though sea transportation combined with trucking is competitive in carbon emission per unit distance travelled, the total cost of carbon emission and transportation for the sea transportation may not have competitive advantage over other transportation modes including rail and truck transportation modes. The sea-based intermodal logistics service may induce detours which have negative impacts on the overall carbon emission. The proposed logistics decision support system is expected to play key role in green logistics and supply chain management.