• Korean Institute of Interior Design Journal
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• v.15 no.1 s.54
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• pp.113-120
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• 2006

This study analyzes the space composition and the construction system of performance facilities, and research the area construction ratio of each necessary space to establish the specialized performance facilities. This study aims the exclusive facilities for opera among the various performance facilities at home and abroad. The results are as following, 1) Performance space is divided into Public space, Performance space and Administration space on the basis of user. 2) The difference in the scale of performance facilities depends on the fractionation of performance supporting facilities and the grade of specialty rather than the number of seats. 3) The scale and zoning of space in the performance facilities to be built in the future, it is necessary to consider ensuring the production support space, the organic connection of support space and the integrated public space.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.761-763
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• 2002

실리콘 웨이퍼 성장에 유리한 수평자장형 마그네트에는 saddle type, cylinder type 등 여러 가지 종류가 있다. 이러한 종류의 마그네트를 사양을 바꿔가며 균일도, 중심자장, 권선에 사용되는 선재량 등을 비교하였다. 해석 tool은 'opera-3d'을 사용하였으며, 기본적인 사양은 실제 System에서 요구되는 수치를 토대로 결정하였다. 본 연구를 토대로 12inch 단결정 성장을 위한 마그네트 종류와 사양 그리고 Cryostat의 기본적인 크기와 두께를 결정하게 되었다.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.1193-1195
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• 2002

This paper presents Active-clamp Class-E high frequency resonant inverter with single-stage. The proposed circuit is integrated Active-c class-E circuit to boost converter with the funct power factor correction. Boost converter is opera positive and negative half cycle respectively at frequency(60Hz), operating in Discontinuous Con Mode(DCM) of boost converter performs high p factor. By adding active-clamp circuit in Cl inverter, main switch of inverter part is operat only ZVS(Zero Voltage Switch), but also reduce switching voltage stress of main switch. Simulation result using Psim4.1 show that the p prove the validity of theoretical analysis. This proposed inverter will be able to be pract used as a power supply in various fields are ind heating applications, DC-DC converter etc.

• Journal of Chest Surgery
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• v.15 no.1
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• pp.15-20
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• 1982

During the past ten years from 1972 to 1981, a total of 100 cases of bronchiectasis were treated by pulmonary resection at C.A.F.G.H. Pulmonary tuberculosis and frequent U.R.I. were the most frequent associated disease and encountered in 54% in this series. Various types of pulmonary resection were performed on 100 patients; left lower lobectomy in 40 cases, left lower lobectomy and lingular segmentectomy In 29 cases, right lower lobectomy in 12 cases, right middle and lower lobectomy in 12 cases, lingular segmentectomy in 3 cases, left pneumonectomy in 3 cases and both lower lobectomy in 1 case. Complications developed in 9 cases and 1 case among them died of sepsis following secondary opera-tion. Among complications of 9 cases, postoperative atelectasis showed in 4 cases, hemorrhage in 2 cases, bronchopleural fistula in 2 cases, pulmonary edema in 1 case. Complications were treated by conservative and secondary operative management with satisfactory result except one death. Remainders without complication showed good result without symptom in postoperative and follow-up periods.

• Journal of Fashion Business
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• v.6 no.6
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• pp.68-77
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• 2002

In this study, based on Choi, Jong Rim's script (2000), the main characters' stage costume designs were presented with 15 illustrated pieces in terms of compounding the images of Korea and West. I considerered the main characters' social status and personality by each act and scene, as well as the correlation of the stage costume's minor theme, color and material. In expressing the stage costume, this study has chosen the formational method of the comparative design dimensions between costumes in 1650s Joseon and baroque period and used the joinder of flat pattern and draping in various parts of the costumes.

• Journal of Advanced Marine Engineering and Technology
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• v.21 no.3
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• pp.293-301
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• 1997

Edge detection is the first step and very important step in image analysis. We cast edge detec¬tion as a problem in cost maximization. This is acheived by the formulation of a cost function that evaluates the quality of edge configurations. The cost function can be used as a basis for compar¬ing the performances of different detectors. We used a Genetic Algorithm for maximizing cost func¬tion. Genetic algorithms are a class of adaptive search techniques that have been intensively stud¬ied in recent years and have been prone to converge prematurely before the best solution has been found. This paper shows that carefully chosen modifications(three factors of the crossover opera¬tor) are implemented can be effective in alleviating this problem.

• Progress in Superconductivity
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• v.7 no.1
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• pp.83-86
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• 2005

The High-Tc superconducting power cable consists of a multi-layer high-Tc superconducting cable core and a stabilizer which is used to bypass the current at fault time. Eddy current loss is generated in the stabilizer in normal operating condition and affects the whole system. In this paper, the eddy current losses are analyzed with respect to various structure of stabilizer by using opera-3d. Moreover, optimal conditions of the stabilizer are derived to minimize the eddy current losses from the analyzed results. The obtained results could be applied to the design and manufacture of the high-Tc superconducting power cable system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.718-721
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• 2012

It is not an exaggeration that the world is connected by the internet currently. The must people using a computer are making the most of the internet. We use the web browser to connect the internet. By using the current a variety of browsers including Internet Explorer, Safari, Chrome, Firefox, Opera, we understand the advantages and disadvantages of them and make the customized web browser MPK by using visual basic programming language.

• Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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• 2003.02a
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• pp.200-202
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• 2003

In this paper, 3-D electromagnetic analysis of a single phase 1MVA 22.9kV/6.6kV High Temperature Superconducting(HTS) transformer with double pancake windings by using the OPERA 3D was accomplished. And in order to perform the analysis of leakage impedances of a 1MVA HTS transformer, the energy conservation method was used. The efficiency voltage regulation and ％ impedance voltage drop of a 1MVA HTS transformer were obtained by the analysis of leakage impedances.

• Journal of Magnetics
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• v.3 no.3
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• pp.69-73
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• 1998

A drum type magnetic separator was designed and optimized by computer simulation. The separator consisted of rotating outer shell of drum, magnetic flux generator drum which was assembled with numbers of disk type magnet holders, and drum axis around which the magnet holders were fixed. NdFeB magnet blocks were inserted into the disks, and the disks were assembled layer by layer along the drum axis. Magnetic circuits of the separator were simulated on the basis of highest magnetic strength, least cost, and high yield of separation by using a Vector Field S/W employing the Opera-2D program. The separator proved a separation yield of 95% in removing fine iron-base particles, and installed at Hot Rolling Mill of Pohang Iron & Steel Co. In Korea.