• Title/Summary/Keyword: Chosun

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Simulator implementation for characteristics analysis of PV System (태양광발전시스템 특성해석을 위한 시뮬레이션 구현)

  • Park, J.M.;Jeong, B.H.;Piao, Z.G.;Choi, Y.O.;Cho, G.B.;Baek, H.L.
    • Proceedings of the KIEE Conference
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    • 2006.04b
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    • pp.383-385
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    • 2006
  • This paper summarizes the results of these efforts by offering a photovoltaic system structure in 50kW large scale applications installed in Chosun University dormitory roof and simulation tool. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 50kW utility PV system examination result.

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Traumatic Neuroma Following Mandibular Angle Reduction : A Case Report

  • Oh, Ji-Su;Kim, Su-Gwan;Kim, Hak-Kyun;Moon, Seong-Yong;Lim, Sung-Chul;Yoon, Jung-Hoon;Ahn, Sang-Gun
    • Journal of Korean Dental Science
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    • v.2 no.1
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    • pp.39-41
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    • 2009
  • A traumatic or amputation neuroma can develop as a result of nerve injury caused by hemorrhage, infection, ischemia, trauma, etc. A traumatic neuroma can be considered as the attempted regeneration of the amputated nerve rather than a true neoplasm. Occasionally, a traumatic neuroma will develop after oral or maxillofacial surgery. Here, we report a case of traumatic neuroma after mandibular angle reduction in a 24-year-old woman.

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Optical Cmharacterization of Dihydrotetraphenylsilole and Nanoaggregates (Dihydrotetraphenylsilole 및 나노응집체의 광학적 특성)

  • Lee, Sung Gi;Yang, Jinseok;Choi, Tae-Eun;Han, Joungmin;Sohn, Honglae
    • Journal of Integrative Natural Science
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    • v.2 no.1
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    • pp.32-36
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    • 2009
  • The purpose of this project is the synthesis of dihydrosilole and its optical characterization for their applications. Dihydrosilole was synthesized from the reduction reaction of either dichlorosilole or chlorohydrosilole with lithium aluminium hydride. The reaction yield for the dihydrosilole through the latter method was higher. The optical characteristics and AIEE effect of dihydrosilole nanoaggregates was investigated for the purpose of increasing the photoluminescence efficiency. Photoluminescence efficiency of dihydrosilole nanoaggregates increased about 100 times compared to that of molecular state.

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Multiple-Bit Encodings of Bragg Photonic-structures by Using Consecutive Etch with Various Square Wave Currents

  • Lee, Bo-Yeon;Hwang, Minwoo;Cho, Hyun;Kim, Hee-Chol;Cho, Sungdong
    • Journal of Integrative Natural Science
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    • v.4 no.3
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    • pp.192-196
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    • 2011
  • New method to encode multiple photonic features of Bragg type reflector on silicon wafer has been investigated. Multiple bit encodes of distributed Bragg reflector features have been prepared by electrochemical etching of crystalline silicon by using various square wave current densities. Optical characterization of multi-encoding of distributed Bragg reflectors on porous silicon was achieved by Ocean optics 2000 spectrometer for the search of possible applications of multiple bit encoding of distributed Bragg reflectors such as multiplexed assays and chemical sensors. The morphology and cross-sectional structure of multi-encoded distributed Bragg reflectors was investigated by field emission scanning electron micrograph.

The Housing Problem appeared in Chosen Dynasty Chronicles (조선왕조실록에 나타난 주거문제)

  • 한지현;박선희
    • Journal of the Korean housing association
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    • v.10 no.4
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    • pp.41-52
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    • 1999
  • The objective of this study is to consider the disputed point of housing problem appeared in Chosun Dynasty Chronicles and to consider the change of housing problem appeared in Chronicles according to the times. The results are: Housing affairs problem appeared steadily until king Se-chong and increased sporadically under the reign of king Sung-chong, Chung-chong. General housing hardly appeared in the early of Chosun. And it appeared sometimes in the late of Chosun. Palace problem increased gradually from the early of Chosun. And in the times of king Yonsangun it appeared most highly. Later it decreased gradually, but in the times of king Kwanghaegun it increased suddenly. And it hardly appeared in the late of Chosun. National disaster problem appeared a little in the early of Chosun but increased gradually in the middle and late of Chosun.

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