• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1453-1455
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• 1996

The odd-even effect of the alkyl chain length of rubbed polyimide Langmuir-Blodgett (LB) surfaces on the extrapolation length of 5CB has been successfully evaluated for the first time by measuring polar anchoring strength. The extrapolation length of 5CB for rubbed PI-LB surfaces with even-numbers is small compared with odd-numbers for alkyl chain lengths of greater than 7 carbons. The extrapolation length of 5CB on rubbed PI-LB surfaces with odd-numbers increases gradually as the temperature increases but tends to diverge near the clearing temperature (Tc=$35.3^{\circ}C$). The extrapolation length diverges because of rapidly decreasing surface order near $T_c$. We suggest that the polar anchoring strength on rubbed PI-LB surfaces with even-number is strong because of relatively high surface ordering caused by more crystalline surfaces. Finally, we conclude that the odd-even effects of the polar anchoring strength in NLCs are strongly related to the character of the polymer and observed clearly for long alkyl chain lengths.

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.1109-1111
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• 1997

The purpose of this paper is to analyze the effects of switching-over control for power system stabilization. Switching-over control is applied to western part of korea electric power system to improve transient stability and short-circuit capacity. It's effectiveness is demonstrated in terms of fault current level and critical clearing time which is quantitative evaluation means of transient stability. The effect of generator tripping for power system stabilization is also presented.

• Journal of Haehwa Medicine
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• v.10 no.1
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• pp.47-53
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• 2001

In the result of investigating traditional chinese medical literatures to understand drug-processing about Pyritum, we could reach conclusions as follows: 1. Pyritum are divided into fresh Pyritum, calcining Pyritum, tempered Pyritum with vinegar by methods of drug-processing. 2. The methods of drug-procession about Pyritum like calcination, quenching, refining drugs with water or medicinal broth of Glycyrrhizae Radix(licorice), boiling with medicinal broth of Glycyrrhizae Radix(licorice) were used complicately. 3. Calcining Pyritum are grinded easily, convenient to apply a pill and powder and As, S are easily removed. Quenching Pyritum act on liver channel and then are reinforced the effects of relieving blood stasis, Pain and gushed out effecive ingredients. Refining Pyritum with water are reinforced the effect of tranquilizing the mind and clearing heat. above results indicates that using calcination, quenching and refining drugs with water together is the best method of drug-processing about Pyritum.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.49 no.11
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• pp.558-565
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• 2000

In this paper, we propose a method for mitigating for mitigating the effect of voltage of voltage sag in radial power distribution systems using load transfer switching (LTS). The term of LTS is defined that the weakness load points for voltage sag transfer to the alternative source during the fault clearing practices. The sequenced of proposed LTS method is divided into the search of weakness points for voltage sag using the risk assessment model and transfer behavior of weakness points. The search of weakness point is carried out using the risk assessment model of voltage sag and Monte Carlo simulation method and the historical reliability data in Korea Electric Power Corporation (KEPCO) are also used. Through the case studies, we verify the effectiveness of proposed LTS method and present the searching method of effective application points of LTS method using the risk assessment model.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.7
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• pp.311-316
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• 2002

It has been a basic model for the present electric power industry that more than two generators compete, and thereby the market clearing price and the generation schedules are determined through the bid process. In order for this paradigm to be applicable to real electric power systems and markets, it is necessary to reflect many physical and economic constraints related to frequency and transmission in the dispatching schedule. The paper presents an approach to deriving a Nash bargaining solution in a competitive electricity market where multiple generators are playing with the system operator who mitigates the transmission congestion to minimize the total transaction cost. In this study, we take the effect of the line flows and the role of system operator into the Game. Finally, a case study has been demonstrated to verify the proposed cooperative game.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.30 no.1
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• pp.21-27
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• 2016

The study concerning about the grid connection of the large-capacity battery energy storage system(BESS) is increasing. However, the protection study which is necessary to maintain the reliability of distribution system has been hardly performed. Therefore, this paper analyzes the effect of reclosing among protection issues in distribution system with BESS and proposes the new relcosing method. To verify the proposed method, the BESS, distribution system, and proposed method are modeled by using EMTP/ATPDraw and the various simulations according to the fault clearing time are performed. The simulation results show that the reclosing in distribution system with BESS is successfully performed by proposed method and the operation of BESS is not affected from reclosing.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.156-158
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• 2002

In this paper, we analyze about voltage sag effect at load side during fault according to change of power system condition. through the case studies, we find that there is no close connection between substation bus transfer and voltage sag during fault. however, we find that other feeder connecting with the faulted transmission is directly affected by fault type and magnitude, therefore, the main subject can be divided into the utility and customer side countermeasures, utilities concentrate their effort to prevent the faults and to modify the fault clearing practice in power system. however, the faults in power system can never be completely eliminated. therefore, customer side solutions usually involve the power conditioning equipment for sensitive loads aiso, we investigate that the several methods to reduce the number and severity of voltage sag and to dull the sensitivity of equipment for voltage sag have developed. moreover, about SEMI, the industry association for the semiconductor two voltage sag immunity standards.(SEMI F47, SEMI F42) The simulation is accomplished by PSS/E 26.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.29 no.4
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• pp.78-94
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• 2016

Objectives : This study was carried out to analyze the trends of clinical studies of allergic contact dermatitis published in the Journal of Korean Medical Ophthalmology & Otolaryngology & Dermatology. Methods : We studied 10 research papers on allergic contact dermatitis published in JKOOD. We analyzed about experiment methods, pharmacodynamic effects, therapeutic effects in published papers. Results : 1. The number of searched journal is 10 papers. 2. All experiments was performed using DNCB primed mouse. To demonstrate therapeutic effect of drugs, previous researches observed dermatological and histopathogical conditions, erythema, melasma, white blood cell count, Lymphocyte ratio to white blood cell. 3. Most of drugs have heat-clearing and detoxifying effects. 4. Every drugs have positive effect in treating allergic contact dermatitis. Conclusions : Figuring out how experiment proceeded and tendency of drugs in researching allergic contact dermatitis is significance of this paper. Further research about drugs and their treating methods should be carried out to improve curative effectiveness for allergic contact dermatitis.

• Journal of Oriental Neuropsychiatry
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• v.21 no.1
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• pp.43-57
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• 2010

Objectives: This study was designed to assess neuroprotective effects of herb medicine against Alzhheimer's disease related brain damage in organotypic hippocampal slice culture. Methods: We induced dementia related brain damage in organotypic hippocampal slices by $\beta$-amyloid. Those slices were treated with herb medicines - Hwangryeonhaedoktang, Sopungsoongiwon. Using by PI staining, the extents of cell death were assessed. After that, we selected the best effective one among those herb medicines and the major components of that medicine were studied to reveal neuroprotective effects and related proteins by using PI stating. Results: In PI staining, Sopungsoongiwon is the best effective herb medicine between Hwangryeonhaedoktang and Sopungsoongiwon. Notopterygii Rhizoma, Corni Fructus, Areca Catechu, Aurantii Fructus Immaturus, Plantaginis Semen is the best effective one among the components of Sopungsoongiwon. Conclusions: We suggested that purgative effect would be the best effetive medicine on dementia related brain damage between clearing heat and toxic materials.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.2
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• pp.758-764
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• 2010

This study showed effective and new applicative direction of CRM of medical management after arranging CRM researches, measuring CRM activity and the results of medical institutions and clearing factors having an effect. In other words, 'Human Factors' variables and 'Physical Factors' variables have an effect on the result of CRM. 'Human Factors' variables have an effect on the qualitative result and 'Physical Factors' variables have an effect on the quantitative performance. In more strategic CRM continuum, Human Factors have a significant effect on the whole performance of CRM. And in more tactical, CRM continuum Human Factors and Physical Factors have significant effect on the whole performance of CRM. Consequently, The key point is grasp of what characteristics exist in CRM between strategic level and tactical level. This provides the foundation for the variables in marketing practice.