• Title/Summary/Keyword: Volume transport

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A Pattern of Multimodal Transport Liability and its Adaptation on Practice (복합운송인(複合運送人)의 책임(責任) 한계(限界)에 대한 형태별(形態別) 분류(分類)와 실무상(實務上) 적용(適用))

  • Kim, Joong-Kwan
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.13
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    • pp.257-281
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    • 2000
  • The world economy is becoming increasingly globalized. The globalization has resulted in far reaching agreements to deepen trade liberalization and enlarge its scope to cover new areas in addition to strengthening its supporting institutional base. Economic growth has developed international trade which has accelerated the development of international carriage of goods in 21st century. The international trade is basically founded on the contract of international sale of goods and backed up by the contract of international carriage of goods and the insurance on the goods carried. It is essential to incorporate each other sections for the efficient development of international trade. As a result of rapid expansion of international carriage of goods, rationalization of transport was required, which has brought about the International Multimodal Transport System through containerization. The approach to liability system will be a right way to solve the insurance problems for the development and enlargement of world trade volume. International multimodal transport system has affected international trade a lot, especially the field of insurance a grate deal. This paper is to analyze contents of liability system on Multimodal Transport with in the UN Convention on International Multimodal Transport of goods.

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An Advection Scheme for the Transport of Fractional Volume of an Incompressible Fluid (비압축성 유체의 체적비 수송에 대한 대류항 계산 기법)

  • Kwak Ho Sang;Kuwahara Kunio
    • Journal of computational fluids engineering
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    • v.3 no.1
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    • pp.1-10
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    • 1998
  • 서로 섞이지 않는 두 비압축성 유체의 유동을 해석하기 위하여 VOF 방법에 기초한 수치 기법을 개발하였다. 유체간의 계면형상의 거동은 유동장내의 유체의 점유체적비의 변화에 의해 묘사되는데 이를 지배하는 이동방정식을 풀기 위한 새로운 대류항 계산법을 고안하였다. 대류항은 유체계면의 방향에 따라 풍상법과 역풍상법의 적절한 조합을 취하여 계산하는데 여기에 대각방향의 상류효과를 포함시켜 시간에 대한 2차 정확도를 갖도록 하였다. 또한 이 방법을 유량보정수송(FCT)법과 결합시켜 해의 단조성을 보장하였다. 몇 가지 단순 문제에 대한 시험 결과 이 기법이 수치오차에 의한 계면형상의 변형과 파손을 감소시킴을 확인하였다.

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Monthly Wind Stress and Wind Stress Curl Distributions in the Eastern Sea(Japan Sea) (동해상의 월별 바람응력 및 바람응력컬 분포)

  • 김철호;최병호
    • Water for future
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    • v.19 no.3
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    • pp.239-248
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    • 1986
  • Monthly wind stress, wind stress curl and volume transport stream functions are computed in the Eastern Sea(Japan Sea) based upon observed wind and atmospheric pressure data respectively. The presented two results show different distributios on locality and season but as common features the results reveal the northwesterly surface wind stress \ulcorner 새 the monsoon in winter, south to southwesterly wind stress \ulcorner 새 the southerly wind in summer and strond anticyclonic curl in the northern part on the Eastern Sea(Japan Sea) in winter. In the distributions obtained from the sea level atmospheric pressure data, the maximum value of the wind stress and of curls of small scales are shown off the southeast coast of Siberia and northeast coast of Korea. Volume transport distributions obtained from the Sverdrup relationship suggest that the strong northward boundary current can be formed along the northeast coast of Korea in winter and weak southward boundary current in summer.

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A sutdy on the District Unit Design by Traffic Assignment (교통량 배정을 고려한 지구단위설계에 관한 연구)

  • Jin, Jang-Won
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.4
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    • pp.1880-1888
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    • 2012
  • This study tried to analyze traffic assignment volume by application of land use patterns and transport policies in District Unit Design. It is postulated a Toy network and various scenarios which are combined land use patterns and transport policies for analyzing change of assignment volume. As results, this study shows best District Unit Design technique is the policy that develop mid block and introduction of car free zone to inner 2 way streets. Worst design technique is the policy that introduction of joint car parking to mid block. And also worst design technique to residents who are living in inner block is the policy that just develop only one center zone.

Wear Characteristics of Particulate Reinforced Metal Matrix Composites Fabricated by Pressureless Metal Infiltration Process (무가압함침법으로 제조된 입자강화 금속복합재료의 마모특성)

  • Kim, Jae-Dong;Jung, Sun-Uk;Kim, Hyung-Jin
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2002.10a
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    • pp.379-384
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    • 2002
  • The effect of size and volume fraction of ceramic particles with sliding velocity on the wear properties were investigated for the metal matrix composites fabricated by pressureless infiltration process. The particulate metal matrix composites exhibited about 5.5 - 6 times of excellent wear resistance compared with AC8A alloy at high sliding velocity, and as increasing the particle size and decreasing the volume fraction the wear resistance was improved. The wear resistance of metal matrix composites and AC8A alloy exhibited different aspects. Wear loss of AC8A alloy increased with sliding velocity linearly. whereas metal matrix composites indicated more wear loss than AC8A alloy at slow velocity region, however a transition point of wear loss was found at middle velocity region which show the minimum wear loss, and wear loss at high velocity region exhibited nearly same value with slow velocity region. In terms of wear mechanism, the metal matrix composites exhibited the abrasive wear at slow to high sliding velocity generally, however AC8A alloy showed abrasive wear at low sliding velocity and adhesive and melt wear at high sliding velocity.

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A Study on Synthetic OD Estimation Model based on Partial Traffic Volumes and User-Equilibrium Information

  • Cho, Seong-Kil
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.7 no.5
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    • pp.180-183
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    • 2008
  • This research addresses the problem of estimating Origin-Destination (O-D) trip matrices from link volume counts, a set of unobserved link volumes and information of user equilibrium flows in transportation networks. A heuristic algorithm for estimating unobserved link flows is derived, which provides volume estimates that are approximately consistent with both observed flows and an assumption of user equilibrium conditions. These estimated link volumes improve the constraints associated with the synthetic OD estimation model, providing improved solution search procedure. Model performance is tracked in terms of the root mean square errors (RMSE) in predicted travel demands, and where appropriate, predicted linked volumes. These results indicate that the new model substantially outperforms existing approaches to estimating user-equilibrium based synthetic O-D matrices.

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Analysis of bulk freight transportation (벌크화물 수송실태 분석)

  • Lee, Suk;Kim, Young-Joo;Kim, Kyoung-Tae;Kwon, Yong-Jang;Kim, Seung-Mo
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.3278-3288
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    • 2011
  • Bulk freight is transported by a freight car, ship and tank lorry without packaging in a state of particles or powders. In korea, the main bulk freight include oil, grain, coal, cement, iron ore and these are occupied nearly 30% of the volume of gross domestic freight transportation. Therefore it is in important to transport efficient bulk freight transport system for the improvement of national distribution competitive as raw material for industry. Generally environment-friendly transfer modes such as railway and sea transport play an important role in bulk freight transport due to the mass transfer characteristics of bulk freight. This study is carried out for examining the problem of oil, grain, coal, cement, ore transportation through analyzing distribution flow of items and understanding characters of transfer modes.

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Polarization and Charge Transport in Epoxy (에폭시의 분극 및 전하 이동)

  • Ahn, Jong-Hyun;Choi, Chung-Seog
    • Proceedings of the KIEE Conference
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    • 2008.09a
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    • pp.229-230
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    • 2008
  • The investigations included the measurements of volume currents and also internal space charges on epoxy samples of mm thicknesses. The current versus time relations were shown to correspond well with classical forms of dielectric response such as the Curie-von Schweidler model. After the time transient, near steady currents were extremely small and exhibited a significant temperature dependence, similar in relation to the Poole-Frenkel hoping transport model. Equivalent resistances were on the order of $10^{19}$ ohms and represent very weak charge transport. Electrically stimulated acoustic waves were used to quantify the small internal charges that would accumulate within the epoxy. There was a notable homocharge near both anode and cathode. The dielectric response and the internal charge were related to show a consistent model for charge transport within unfilled epoxy.

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An Appreciation and a Prospect on the Rotterdam Rules (로테르담 규칙에 대한 평가와 전망)

  • Yang, Jung-Ho
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.51
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    • pp.359-389
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    • 2011
  • The Rotterdam Rules, which was adopted in December 2008 by UNCITRAL, has underlying intention that it will provide uniform law for the international carriage of goods by sea and modernize transport law reflecting modern transport custom. However, it is also true that there are various conflicting views on the Rotterdam Rules. This article tried to analyze main controversial issues such as scope of application, basis of liability of the shipper and the carrier, exception th the volume contract, legal position of the freight forwarder, delivery of the goods from the both sides of view. The Rotterdam Rules exposes some problems in applying and interpreting the Rules as many people indicated. These problems, I think, mainly due to the extended scope of application and broader range of issues. However, I do not think that the Rotterdam Rules will serious affect to the international transport industry. Furthermore, it is unreasonable to expect perfect Rules satisfying every interests.

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Polarization and Charge Transport in Unfilled Epoxy (비충전 에폭시의 분극 및 전하 이동)

  • Gwak, Hyun-Woo;Choi, Yong-Sung;Lee, Kyung-Sup
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.2311-2312
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    • 2008
  • The investigations included the measurements of volume currents and also internal space charges on epoxy samples of mm thicknesses. The current versus time relations were shown to correspond well with classical forms of dielectric response such as the Curie-von Schweidler model. After the time transient, near steady currents were extremely small and exhibited a significant temperature dependence, similar in relation to the Poole-Frenkel hoping transport model. Equivalent resistances were on the order of 1019 ohms and represent very weak charge transport. Electrically stimulated acoustic waves were used to quantify the small internal charges that would accumulate within the epoxy. There was a notable homocharge near both anode and cathode. The dielectric response and the internal charge were related to show a consistent model for charge transport within unfilled epoxy.

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