• IE interfaces
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• v.24 no.2
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• pp.164-172
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• 2011

H maritime company in Korea had a long history of difficulty in obtaining enough empty containers to transport its commodities. Despite efforts to resolve the problem, the repositioning of empty containers between depots was still planned manually, which consumed much worker time. To automate the generation of reposition plans, we developed a planning system to optimize the company's reposition of empty containers between global depots with a linear programming model functioning as a key decision engine in the system. The model determines the route, volume and mode of transportation for repositioning empty containers from depots with surplus containers to those requiring containers, as well as the empty space of ships generated from the unloading or loading of full and empty containers. The system has been in operation in the company's global network since March 2008.

• Journal of Korean Society of Transportation
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• v.22 no.2 s.73
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• pp.7-18
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• 2004

This study aims to present the establishment and necessity of the proper market segmentation by customer preference. In this study, benefit segmentation method was employed using conjoint analysis to measure price elasticity by segmented groups. It presents that the price elasticity is different by characteristic of customers using parcel service in this result. Benefit segmentation, therefore, may use some useful marketing tool when a parcel service company segments the market to provide better service.

• Electronics and Telecommunications Trends
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• v.33 no.4
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• pp.70-80
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• 2018

Drones are now widely used in civilian applications such as filming, leisure, agricultural control, monitoring, and the generation of 3D-spatial information, deviating only from military drones. In the field of logistics, prototypes are emerging in the area of logistics transportation, and to develop a future transportation service under the name of a drone tax, each country is introducing its first flight results using its own unique drones. In this paper, we review the domestic and overseas trends of drone delivery service technology, which requires various capabilities such as automatic flight, and review the related core technologies. We then propose the flight capability and road map of a drone delivery service according to the detailed conditions such as the flight area, visibility, and flight method. Additionally, in connection with the postal processing of the Korea Post Office, which would be a main demand for this type of service, we describe a method for realizing a drone delivery service based on the structure, scenario, and deployment of the drone delivery system.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.1132-1137
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• 2005

Trans-Siberian Railway (TSR) has been recently rising to the surface as the world important issue with Trans-Korea Railway (TKR). This can change transportation means from sea to railway and enhance Korean international position through the North-east Asian economic cooperaton with Russia. In particular, when 'Iron Silkroad' linking TKR is created, it can revitalize the underdeveloped East Russia and Far East's economies and Korean railway can play a key role as the North-east Asian logistics center and exerts a powerful influence on them. In addition, Korean railway expects to obtain economic benefits accruing to various value-added businesses such as IT, tourism, especially, transportation business from the East Siberia, the world largest reserves of energy to Korea. This study tries to find economic value analysis and guidelines on strategies of Korean railway with international logistics base built in Khassan (Vladivostok contiguity region) through the development of energy deposited around east of TSR.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.352-358
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• 2010

When the Trans-Korea Railway (Gyeong-eui Line and Dong-hae Line) initiative is completed, Korea will become one of the major trading partners of Russia through the Trans-Siberian Railway (TSR). This will be an opportunity for Korea to take-off to a 'Traffic and Logistics Center in 21st Century. The opening of the Eurasia Continental Railway will provideKorea with the opportunity to develop into the logistics center of Asia-Pacific area and the benefit of reduced cost of unification by improving the correlation between South and North Korea through the cooperation in railway business. However, there exist the uncertainties for its demand and innovative reduction in transportation time and cost, due to the practical problems including economic efficiency and transportation technology. In this paper, the practical problems of TSR are discussed in the economic and social perspectives to develop the methodology for the Korea-Russia railway cooperation and for the improvement of the competitive power of TSR.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.550-551
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• 2012

기업에서 발생하는 물류비용 중에 운송비가 차지하는 비중은 50% 이상이다. 국제 유가 급등에 따른 운송비용이 급상승하면서 배송관리의 중요성은 더욱 커지고 있다. 배송관리시스템은 고객에게 주문받은 물품을 물류센터에서 배송계획을 수립하여 배차지시, 정산관리 및 차량의 트랙킹 등 전반적인 배송과정을 관리하는 시스템이다. 기존의 배송방법은 우편번호를 기준으로 하는 고정 라우팅 방식을 사용하였다. 이러한 방식은 배송기사가 비교적 쉽게 배송할 수는 있지만 물동량의 급격하게 변할 때에는 실시간으로 대응하지 못하는 문제점을 갖는다. 본 논문에서는 물동량의 변화에 효율적으로 대응하여 배송하기 위한 방안으로 지능형 배송관리시스템의 설계 방안을 제안한다.

• International Journal of Aeronautical and Space Sciences
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• v.14 no.3
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• pp.272-281
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• 2013

Traffic Collision Avoidance System (TCAS) is designed to enhance safety in aircraft operations, by reducing the incidences of mid-air collision between aircraft. The current version of TCAS provides only vertical resolution advisory to the pilots, if an aircraft's collision with another is predicted to be imminent, while efforts to include horizontal resolution advisory have been made, as well. This paper introduces a collision resolution algorithm, which includes both vertical and horizontal avoidance maneuvers of aircraft. Also, the paper compares between the performance of the proposed algorithm and that of algorithms with only vertical or horizontal avoidance maneuver of aircraft.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.31 no.2
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• pp.19-27
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• 2008

This paper addresses determining the location of the distribution centers in a discrete dynamic distribution system. In discrete and finite time horizon, the demands of retailers are dynamic for the periods. Some locations among the retailers can be chosen for the role of the distribution centers at the beginning of each period. The distribution centers have to be located at the location of minimizing logistics cost. Logistics cost factors are the operation cost and the fixed cost of distribution center, and the transportation cost. The distribution centers of minimizing sum of operation cost, fixed cost and transportation cost are determined among retailers in each period for the planning period. A mathematical model was formulated and a dynamic programming based algorithm was developed. A numerical example was shown to explain our problem.

• Journal of Korea Port Economic Association
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• v.21 no.3
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• pp.61-81
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• 2005

China has increased 10 percent every year since 1978. In particular, development and growth of Chinese ports make a remarkable in that the marine and coastal transportation handles the 90 percent of export-import cargo. This growth is beginning to threaten Korea's ports which are striving to become the hub of Northeast Asia logistics. Furthermore, the hub strategy of Northeast Asia is closely related to transshipment cargo invitation. The results of documents research indicate Busan and Gwangyang ports play an important role as an intermediate stopover between China and America. The ways to achieve transshipment cargo invitation are the construction of transshipment system based on the supply chain between korea and china, the maximization of trading volumes creation, equipment of ports infrastructure, and the constructions of the rail, road, coastal transportation infrastructures.

• Journal of the Korea Safety Management & Science
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• v.14 no.4
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• pp.39-49
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• 2012

The purpose of this study was to investigate the influence of air traffic controller's leadership characteristics and hazardous attitudes on the team effectiveness. The effectiveness make use of team efficacy and team commitment. Leadership characteristics and hazardous attitudes make use of the contents of a CRM manual. The study showed following results. 1) Leadership characteristics has a positive influence on the team effectiveness. 2) Hazardous attitudes has a partially bad influence on the team effectiveness. This study was conducted under the auspice of civil and military ATC facilies and by participation of devoting ATC controller's.