• 한국안전학회지
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• 제7권3호
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• pp.89-98
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• 1992

In this study, the methods to identify the causes of electrical fires are suggested. Among several causes of electrocal fires, it is focused upon a short-circuit and an over-current accidents, which take the highest ratio compare with any other causes. To propose the exact method of identification, electric wires(HIV, IV), fuses and plug-receptacls are tested under the conditions of electrical accidents and external fires, respectively. By analyzing the microphotographs, the differences between the results from electrical fires and the others are found out.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.574-580
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• 2003

This research heightens use efficiency of existent train railroad equipment by maximum through communication based train control system, and because system that take advantage of new skill compares with safety of old signal system same or it that show that is high be. Examined MBS Embodiment method of most suitable by presenting calculation that find out location of train that this treatise runs free curved line department to embody MBS(Moving Block System) through communication

• 산업경영시스템학회지
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• 제24권62호
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• pp.69-77
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• 2001

A current design trend of a vending machine is pursuing easy manufacturing and large capacity of holding cans. Therefore this study aims to ergonomically redesign vending machine and to analyze the motion of awkward posture to take out cans. Using Vision 3000 system, after investigating which motion can affect users, a new ergonomically designed vending machine, which was based on anthropometric data and guideline for control panel and exit of cans. New design shows a significantly improved usability and less stress. With new ergonomically designed vending machine at figure 3 can give a benefit for both users and manufactures.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.150-155
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• 2002

En case of the fatigue life evaluation of rolling stock structures, mainly deterministic fatigue life evaluation has been carried out. But most of the parameters influencing on the fatigue life have a probabilistic distribution such as normal, log-normal, Weibull, etc. Therefore, to take probabilistic factors into fatigue life evaluation, probabilistic methods are being applied to the fatigue life evaluation of rolling stock. In this paper, probabilistic S-N analysis and methods using limit state functions are introduced. And some results of fatigue life evaluation obtained with these methods for rolling stock structures are shown.

• 지능정보연구
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• 제4권2호
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• pp.117-128
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• 1998

CBR is a knowledge-based system that utilizes the previous knowledge or experience to solve the current problem. In previous CBR research, the emphases are mainly put on the development of more sophisticated indexing mechanism for past cases or the most similar case retrieving methodology out of a group of previous cases. In this paper, discussed is a CBR system that is able to take advantage of the case or knowledge that does not belong to the past in the telecommunications internetworking design area. And the architecture for such CBR system is proposed. Finally, the performance of the CBR system is shown through an ablation experiment.

• 대한전기학회논문지
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• 제43권5호
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• pp.861-865
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• 1994

By using Neural Networks, a 8$\times$8 Banyan network controller is designed and implemented. In order to solve internal blocking and output blocking, Winner-Take-All method is used. The longer queue takes higher priority. First-in-first-out method is used among the non-blocking cells in the queue selected.The required time to select a cell is 2.7 $\mu$sec for 155Mbps. The implemented controller using Xilinx FPGA chip selects cells within 2.5$\mu$sec.

• Nuclear Engineering and Technology
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• 제50권5호
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• pp.717-723
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• 2018

Thermal analysis of accident conditions is an important problem during safety assessment of the dry spent nuclear fuel storage facilities. Thermal aspects of accident conditions with channel blockage of ventilated storage containers are considered in this article. Analysis of flow structure inside ventilated containers is carried out by numerical simulation. The main mechanisms of heat and mass transfer, which take part in spent nuclear fuel cooling, were detected. Classification of accidents on the basis of their influence on the maximum temperatures inside storage casks is proposed.

• Bulletin of the Korean Chemical Society
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• 제16권10호
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• pp.968-971
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• 1995

The heme assignment of the 1H NMR spectrum of cytochrome c3 of Desulfovibrio vulgaris Hildenborough within the X-ray structure were fully cross established according to their redox potential. The major reduction of the heme turned out to take place in the order of hemes Ⅳ,Ⅰ,Ⅱ and Ⅲ(the heme numbers indicating the order of bonding to the primary sequence). This assignment can provide the physicochemical basis for the elucidation of electron transfer of this protein.

• 대한예방한의학회지
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• 제20권2호
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• pp.39-51
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• 2016

Objectives : This study was to identify the stop-out experiences of Korean Medicine Students(K.M.S.). The stop-out is defined as a withdrawal temporarily from enrollment at a university. Methods : Data was collected through in-depth individual interviews from 2013 to 2016 and analyzed with Colaizzi's phenomenological methodology. The participants were interviewed once or twice, for 30minutes to 50minutes per interview. Results : Ten theme-clusters were identified from 21 themes. These theme-clusters were divided to 4 divisions as when they made the decision for the stop-out, during their stop-out period, when they went back to school and the meaning of their stop-out. 'A difficult situation to continue the study', 'Uncertainty about their decision and anxiety of the future' are 2 theme-clusters for when they made the decision for the stop-out, 'Conflict and anxiety', 'Novel and free time', 'Improving family relationship and finding new relationship' are 3 theme-clusters for during their stop-out period, 'Anxiety for the returning to school', 'New relationship and sense of relief' are 2 theme-clusters for when they went back to school, and 'Making a present for me', 'An opportunity for the emotional growth', 'Recovery of learning will' are 3 theme-clusters for the meaning of their stop-out that they gave to it. Conclusions : The stop - out of K.M.S. began at the hope that they want to take the lead for their lives. And they would find themselves more mature after the experience of their stop-out. This result could be a basic reference for the counselling of the faculty working with K.M.S.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.313-315
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• 2005

In a power system, an out-of-step condition causes a variety of risk such as serious damage to system elements, tripping of loads and generators, mal-operation of relays, etc. Therefore, it is very important to detect the out-of-step condition and take a proper measure. Several out-of-step detection methods have been employed in relays until now Mo,;t common method used for an out-of-step detection is based on the transition time through the blocking impedance area in R-X diagram. Also, the R-R dot out-of- step relay, the out-of-step prediction method and the adaptive out-of-step relay using the equal area criterion (EAC) and Global Positioning Satellite (GPS) technology have been developed. This paper presents the out-of-step detection algorithm using the time variation of the complex power. The complex power is calculated and the mechanical power of the generator is estimated by using the electrical power, and then the out-of-step detection algorithm, which is based on the complex Power and the estimated mechanical power, is presented. This algorithm, may detect the instant when the generator angle passes the Unstable Equilibrium Point (UEP). The proposed out-of-step algorithm is verified and tested by using Alternative Transient Program/Electromagnetic Transient Program (ATP/EMTP) MODELS.