• Tunnel and Underground Space
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• v.7 no.4
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• pp.334-340
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• 1997

Alpha center theory which was first proposed by Stefanescu has been proved to be effective for the detection of the location of the conductive orebody. A numerical forward modeling was conducted to verify the effectiveness of this method. Field works were carried out along the three profiles in two different areas for the purpose of finding fractured zone which might be accompanied with the presence of the groundwater. And the results were modeled by alpha center method, which was later testified by wellproven 2-dimensional finite difference inversion scheme. Field data could be successfully modeled with this alpha center algorithm, especially for the smooth-varying resistivity models. For the abrupt change of the resistivity values, the alpha center coefficients have a tendency to be negative to simulate the steep resistivity gradients. This method is quite simple and easy for the future applications. The numerical calculation can be performed very quickly with the personal computers.

• Industrial Engineering and Management Systems
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• v.13 no.1
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• pp.1-14
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• 2014

With a steep increase of the global disaster relief efforts around the world, the relief supply chain and humanitarian logistics play an important role to address this issue. A broad overview of operations research ranges from a principle or conceptual framework to analytical methodology and case study applied in this field. In this paper, we provide an overview of this challenging research area with emphasis on the corresponding optimization problems. The scope of this study begins with classification by the stage of the disaster lifecycle system. The characteristics of each optimization problem for the disaster supply chain are considered in detail as well as the logistics features. We found that the papers related to disaster relief can be grouped in three aspects in terms of logistics attributes: facility location, distribution model, and inventory model. Furthermore, the literature also analyzes objectives and solution algorithms proposed in each optimization model in order to discover insights, research gaps and findings. Finally, we offer future research directions based on our findings from the investigation of literature review.

• Journal of the Korean housing association
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• v.12 no.4
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• pp.83-92
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• 2001

The number of aged persons, which would account for 7.1% of total population of 200 year in south korea means that our country would have entered into aging society and that a demand for elderly housing in korea would have been increase rapidly. From this point, this study investigated the present situation of elderly housing in korea, types of those to be provided generally by private and public firms, and the preferred housing types, the location of them and housing sizes of old singles and couples on existing surveys by several firms and organizations. finally, this study suggested several design guidelines to be taken into account in the elderly housings of korea on the basic function of safety, convenience and comfortability and the cultural aspects of leisure life and wealth. Those suggested here will be applied to design guidelines of elderly housing in future.

• 한국전산유체공학회:학술대회논문집
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• 2005.10a
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• pp.87-91
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• 2005

A conceptual design for the movable roll vane system is done for the roll stability control of KSLV-I. The control effectiveness of the roll vanes is estimated using the numerical simulation. The hinge location is selected to minimize the torque requirement at the maximum dynamic pressure condition, and the maximum torque of 3.0 kN-m is found to be required to actuate the roll vanes for the entire range of operation. An electro-mechanical actuator system which is composed of a DC motor, the speed reducers, the battery package and the controller is designed using the given requirements, the maximum torque of 3.0 kN-m, the maximum deflection angle of 25 deg. and the maximum angular velocity of 30 deg/sec. More detailed design to make more compact and highly efficient system will be done in the future.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.333_335
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• 2009

It is expected, in the near future, that the use of distributed generation systems should be increased considerably. In this case, distance relay algorithm should be developed in the manner that it can reduce the error due to the in-feed effect. This paper presents a method to consider the fault current rushed from the remote end of a line. In the steady-state, the relays in both ends exchange the voltages of upper nodes. If a fault is perceived, the relay calculates fault location taking the fault current from the remote end by using voltage data of the remote ends obtained just before the fault. Even though this method has inevitable error, it can show more precise fault allocation. The suggested method is applied to a typical transmission system with two power sources in both ends to verify its effectiveness.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2003.05a
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• pp.82-87
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• 2003

Nowadays' culture' is an important topic of conversation and rigorous researches have been done about the cultures of our neighboring countries such as China and Japan. It is expected that studies concerning applications of each traditional culture in modern design will be made rigorously in the near future. In this context this study chose five-star hotel restaurants located in Korea and investigated how the Korean, Chinese and Japanese cultures are incorporated into their modern interior design. The data were classified by space and design elements. The results show that colorful Korean identity(or Koreanity) was applied in Korean restaurants rather than the simplicity and naturalness of traditional space. As for Chinese restaurants, a large scale of space which Chinese traditional space reveals was not adopted because of their location too, but brilliant patterns and colors were used consistently. The typical Japanese style of simple lines, colors and materials were reflected in Japanese restaurants.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.32 no.1
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• pp.1-6
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• 2008

In order to establish detailed plans for fire protection and reduce the possible fire accidents in the future, a study on the shock wave caused by VCE(Vapor Cloud Explosion) is very important. Destruction phenomena of structure by gas explosion is due to the explosion pressure and heat. Explosion pressure is a kind of energy converted from the gas mixture explosion. Therefore, the propagation progress of shock wave and flame is very important. This study investigated the shock wave caused by VCE in enclosure with opened vent port. From a result, the vent port of top at the straight line of ignition and leak location was opened most rapidly, and the vertical vent port not opened.

• Proceedings of the KSME Conference
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• 2007.05a
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• pp.54-59
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• 2007

In order to establish detailed plans for fire protection and reduce the possible fire accidents in the future, a study on the shock wave caused by VCE(Vapor Cloud Explosion) is very important. Destruction phenomena of structure by gas explosion is due to the explosion pressure and heat. Explosion pressure is a kind of energy converted from the gas mixture explosion. Therefore, the propagation progress of shock wave and flame is very important. This study investigated the shock wave caused by VCE in enclosure with opened vent port. From a result, the vent port of top at the straight line of ignition and leak location was opened most rapidly, and the vertical vent port not opened.

• Journal of The Korea Institute of Healthcare Architecture
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• v.2 no.3
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• pp.35-43
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• 1996

The paper chart of medical record had been used as an important medium of the medical information in the medical recording department. This chart has not dealt with the development of information industry and the change of use of medical record in several decades. This study is to show the data which is helpful for the current spacial situation of medical recording in Korea and understand problems to reconsider the medical recording department of hospital architectural plan. In addition, this study is to look for the spacial changes by computerizing of medical recording and its special confrontation and the prospect for the future medical recording department which is going to work as a medical information center.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.10a
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• pp.38-50
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• 2005

The current Air defense missile, Nike, will be replaced by the Patriot missile in the near future. In this paper, we developed an optimal allocation model for the Patriot missile. In order to formulate the model, we applied a set covering and If model. This model considers not only weapon's characteristics and performances but also the threat of enemy aircrafts and SCUD missiles. When we apply this model, we can find the optimal location of Patriot batteries which maximizes the kill probability of enemy aircrafts and SCUD missiles attacking vital area of our forces. This model can directly be used to the decision making for the optimal military facility allocation.