• International Area Studies Review
• /
• v.20 no.3
• /
• pp.23-44
• /
• 2016

This study attempts to scrutinize the effectiveness of the international economic sanction on North Korea by analyzing the determinants of the North Korea-China trade with Chinese Customs House data classified under general, border, processing, bonded warehouse. The result shows that after international economic sanctions, North Korea-China trade was increased across types of trade. In particular, sanction-sensitive items were increased after sanctions and China also weakened the effectiveness of sanctions. To put it concretely, North Korea's food and fuel imports from china increased in processing and border trade. In the case of luxury good, it was increased in general trade. Strategy goods (weaponry) increased only in bonded warehouse trade. For China's import from North Korea, food and fuel were increased in total, border and bonded warehouse trade. Considering the features of each type of trade, these increase are presumed to have been playing a decisive role in weakening the effect of international sanction on North Korea.

• IE interfaces
• /
• v.16 no.4
• /
• pp.411-420
• /
• 2003

This paper deals with how Korea Post establishes a nation wide network of the parcel warehouse & distribution centers(PWDC). The state-of-the-art of the parcel service business in Japan and U.S. are introduced for benchmarking purpose. Potential customers of the PWDC and their major goods are identified. Current major customers of the Korea Post were interviewed to figure out the potential demand of the PWDC service. Five-year volume estimation of the Korea Parcel Service(KPS) is presented based on the past 30-month B-C volume of the four major door-to-door delivery service companies in Korea. Yearly construction plan of the PWDCs is proposed; and the networking strategy of PWDC is discussed.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2007.11a
• /
• pp.7-11
• /
• 2007

This paper considers a shipment planning of products from manufacturers to a third-party warehouse for demands with production time windows where a demand must be replenished in its time window. The underling lot-sizing model also assumes cargo delivery cost in each inbound replenishment to the warehouse. For this model, an optimal O($nT^4$) is presented where n is the number of demands and T is the length of the planning horizon.

• Journal of the Korean Society of Tobacco Science
• /
• v.25 no.1
• /
• pp.53-58
• /
• 2003

This study deals with the leaf tobacco assignment problem of a leaf tobacco warehouse with multiple input points and single output point. Also, the number of storage frequences is not necessary the same as that of retrieval for each leaf tobacco. A mathematical model is developed with the objective of minimizing the total travel distance associated with storage and retrieval operations. We also develop several heuristics based on the retrieval order frequency, retrieval/storage frequency ratio of leaf tobacco, and ABC curve. It is observed that the ABC curve based heuristic gives the best solution which is near optimal. Based on the test results from real world data, the ABC curve based heuristic is found to give a best performance. Comparing to current assignment method, the ABC curve based heuristic reduced total travel distance about 17.2%.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2005.11a
• /
• pp.409-414
• /
• 2005

We are interaction refrigeration warehouse cold water pump system and photovoltaic generation system. At this time, a target pressure is able to control in spite of change of the pressure according to pump head and rate of flow of pump. Also, we carry out the vector control of BLDC moor with the maximum torque operation and a high reliability from territory of each operation speed. Therefore, in this paper, we conclude energy saving technique of refrigeration warehouse cold water pump system.

• Journal of the Korea Safety Management & Science
• /
• v.10 no.3
• /
• pp.137-143
• /
• 2008

This paper is mainly about the development of u-warehouse management system by using RFID in SCM environment. We developed a web-based real-time u-warehouse management system centering to manufacture enterprises by analyzing the process before and after the adopting of RFID technologies in warehouse management, deducing the standard application process which adopts RFID technologies in SCM environment.

• Proceedings of the KSME Conference
• /
• 2001.06b
• /
• pp.428-435
• /
• 2001

In this paper, the design factors of stacker crane for the automatic warehouse are verified by dynamic simulation process. Simulation model is designed as the form of rigid elements and discrete flexible beam connections. The various result for structural design of stacker crane is produced by dynamic simulation and experiment. For the simulation of structural dynamics, ADAMS which is a software for kinematic & dynamic simulation, is used. In order to verify the analysis method, simulation and experiment result are compared.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.30 no.1
• /
• pp.8-14
• /
• 2007

This paper addresses the allocation planning of the storage location in a warehouse system that the dedicated storage method is used. In the discrete finite time period model, the demands for storage location of products are dynamic for time periods. The planning is to determine the reallocation time period and the storage location of the products in reallocation time period, which minimizes costs. The cost factors are the reallocation cost, the travel cost within warehouse and the surplus storage location cost. A model is formulated, and the property of optimal solution is characterized. The dynamic programming algorithm is developed, and a numerical example is shown.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.14 no.1
• /
• pp.55-62
• /
• 2002

In this paper, several types of infiltration prevention devices that are currently in use have been studied through experimental investigation. Firstly, the types of infiltration prevention devices were defined through investigating actual conditions of refrigerated warehouse in operates. Based on this investigation results, measured change of temperature and figured out air change rates of the type of infiltration prevention devices by using scale down model. After that, found the amount of air change rate in order to estimate the load of air change easily in facility plan.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.20 no.43
• /
• pp.139-144
• /
• 1997

The objective of this study is to establish an actual optimization strategy for the traditional multi-stage distribution system which consists of factory warehouse, central distribution warehouse, and regional distribution warehouse under the basic assumption of distribution system. A minimization algorithm of total operating cost in a multi-stage distribution system was developed by expanding the previously existing algorithm through consideration of additional transportation environment. Alternative non-linear transportation costs for the same travel distance can be applied for the multi-stage distribution system by estimating the corresponding characteristic values through the collection of the actual data representing the change of transportation circumstances.