• Journal of architectural history
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• v.6 no.3 s.13
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• pp.23-44
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• 1997

There are two main halls in the Main Palace of the Koryo Dyansty in the 11th and 12th century. One, named Hoekyongjeon, was served only for special ceremony ; hundred Buddhist priests' sermons or receiption of Chinese emperor's letters. The other one, Kondukjeon, was used as ordinary throne hall. The ordinary throne hall was built when the palace was erected at the beginning era of the Koryo Danasty, while the special ceremony hall built after the reconstruction in the 11th century. The throne hall was located at northwest side of the special ceremony hall. Audience chamber and King's bedroom were located at west and northwest side of the throne hall. The basic layout of the Palace showed unsymmetrical shape. It seemed mainly effected by its undulating terraine. The acess road from main gate to the throne hall showed zigzag way, by following a stream penetrating the site obliquely, It could be said that the Main Palace of the Koryo Danasty achieved its originality on the aspect of unsymmetrical layout and zigzag acess road, which was not found in the former palaces.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.10
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• pp.93-100
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• 2001

The analysis and control of a new type unsymmetrical slotted self-bearing step motor for small angle control is presented. The motor actuator is used for both motor and bearing functionality without any additional coil windings or electromagnets for bearing functionality. A circular-arc, straight-line permeance model for the fringing effect is presented. An unsymmetrical slotted self-bearing step motor layout and control algorithm are described. A new control current generation method using the electromagnets layout geometry, which needs no additional current for bearing functionality, is proposed. As the result of this analysis the fringing effect largely influences on the system characteristics. especially in torque. Even if the bearing functionality is added into the motor functionality, it is shown that the magnitude of torque is not changed.

• Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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• 2003.02a
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• pp.261-262
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• 2003

We performed unsymmetrical analysis of a single line-to-ground fault in a three-phase system. The current limiting elements were meander type YBCO stripes coated with Au shunt. When the fault occurred, short circuit currents were effectively limited within 1-2 msec after fault instant. The unsymmetrical rate of fault phase was distributed from 6.4 to 1.4 and most of the fault current flowed in the grounding line due to its direct grounding system.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.23 no.2
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• pp.148-152
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• 2010

The superconducting fault current limiter (SFCL) applied into the neural line of a power system, which can limit the unsymmetrical fault current from the single-line ground fault or the double-line ground fault, was reported to be the effective application location of the SFCL in a power system. However, the limiting operation for the symmetrical fault current like the triple line-ground fault is not effective because of properties of the balanced three-phase system. In this paper, the limiting method of the symmetrical fault current in a power system with a SFCL applied into neutral line was suggested. Through the short-circuit experiments of the three-phase fault types for the suggested method, the fault current limiting and recovery characteristics of the SFCL in the neutral line were analyzed and the effectiveness of the suggested method was described.

• Bulletin of the Korean Chemical Society
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• v.19 no.10
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• pp.1090-1094
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• 1998

Acid-catalyzed benzidine rearrangements of new unsymmetrical diazanes 1-3, prepared from the reduction of corresponding diazenes 4-6, were carried out in ethanolic solutions. The results are as follows; rearrangement of (3-carbomethoxyphenyl)(3-methoxyphenyl)diazane 1 gave 4,4'-diamino-2-carbomethoxy-2'-methoxybiphenyl 12 (p-benzidine type) in 71% and 10-amino-3-methoxyphenanthridin-6(5H)-one 13, 8-amino-3-methoxyphenanthridin-6(5H)-one 14 in 7.1% and 3.4%, respectively. Product 13 and 14 were formed by the condensation reaction of primarily formed o-benzidine and diphenyline type product, respectively. (5-Carbomethoxy-2-chlorophenyl)(4-methoxyphenyl)diazane 2 and (5-carbomethoxy-2-methylphenyl)(4-methoxyphenyl)diazane 3 underwent mainly disproportionations to give fission amines and corresponding diazenes in about 53% and 40% yields, respectively. The results obtained from the rearrangements of diazanes 1-3 indirectly indicated the importance of disproportionations to understand the benzidine rearrangements. The structures of benzidine rearrangement products were determined by usual NMR techniques such as DEPT, 2D H-H COSY, H-C COSY, 2D NOESY, and Gaussian function multiplication.

• Bulletin of the Korean Chemical Society
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• v.13 no.3
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• pp.265-268
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• 1992

Ruthenium(III) unsymmetrical Schiff base complexes, $[Ru(CHBPH-TP)Cl_2]$ and $K[Ru(CHBPH-HB)Cl_2]$ were synthesized, where CHBPH-TP and CHBPH-HB are 5-chloro-2-hydroxybenzophenonethiophencarba aldehydephenylenediimine and 5-chloro-2-hydroxybenzophenonehydroxybenzophe nonephenylenediimine. These Schiff bases were obtained from the reactions of 5-chloro-2-hydroxybenzophenone (CHB) and 2-thiophenecarbaldehyde (TP) or hyroxybenzophenone (HB) and 1,2-diaminobenzene. Elemental analysis, conductivity and infrared studies of the complexes suggest an octahedral geometry around ruthenium. Magnetic moments of the complexes indicate a single unpaired electron in alow spin $d^5$ configuration. The complexes are capable of catalyzing the oxidation of styrene with sodium hypochlorite in the presence of phase transfer agent. Oxidative cleavage of C=C bond is the major reaction pathway to form benzaldehyde for styrene oxidation.

• Bulletin of the Korean Chemical Society
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• v.31 no.3
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• pp.749-752
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• 2010

• 한국전기화학회:학술대회논문집
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• 1999.10a
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• pp.27-27
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• 1999

• Proceedings of the Korean Society of Potoscience Conference
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• 2002.06a
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• pp.73-73
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• 2002

• Proceedings of the Korean Society of Potoscience Conference
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• 2002.06a
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• pp.77-77
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• 2002