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김건호,B.S. Kim,C.S. Wi,G. Kim,이종덕,J.J. Lee,강정수,K.J. Kim,S.S. Lee,한상욱 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.5I
The initial stage of interface formation at Mn/Si at room temperature (RT) and the growth of manganese silicide were studied by using photoemission spectroscopy (PES) and X-ray absorption spectroscopy with synchrotron radiation. The Mn coverage dependence of the relative intensities of the Si 2p and the Mn 3p core-level PES spectra revealed that the growth of Mn on Si(111)-7×7 at RT started in a layer-by-layer growth at a coverage of less than 0.5 ML. The line shape of Mn 3p XAS spectra also showed no reaction between Mn and Si at RT. The valence-band PES spectra of the three manganese-silicide samples, MSS, MSH, and MSP, showed the same metallic emission. The different line shapes of the Si 2p core-level and valence-band spectra of MSS and MSP compared to those of MSR originate from a Si overlayer on the silicide surface.
재래시장 화재 예방, 변압기 보호장치 최적운영 기술 현장 적용
김건호,Kim, Geonho 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.1
지상변압기는 수용가에 직접적으로 전력을 공급하는 역할을 수행하며 저압 선로의 고장으로부터 계통을 보호하기 위한 보호장치를 구비한다. 본 기술지원은 지상변압기의 STP 미동작에 따른 화재원인을 분석하고 적정동작범위를 제안한다.
고연성-저항복강을 사용한 복합강재댐퍼의 최적형상 도출을 위한 해석적 연구
김건호(Kim, Geon-Ho),김민성(Kim, Min-Seong),조용현(Cho, Young-Hyun),김동건(Kim, Dong-Keon) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
In this study, carbon steel(SS275) and low-yield-point steel(HSA80) were used to develop the CSD(carbon steel damper), the LSD(low-yield-point steel damper), and the HSD(hybrid steel damper). Finite element analysis of the HSD was performed by setting the ratio of the yield strength of the CSD to the yield strength of the LSD to 1, 1.5 and 2, and also by GSD(the general type of the steel damper) with the same yield strength as HSD. Finally, the HSD gave better energy dissipation capability than the general type of the steel damper with the same yield strength. At the yield strength ratio of the LSD was 1.5, it was shown that the HSD gave sequential yield characteristics and higher energy dissipation capacity rather than other types of dampers.
Phylogeny of Korean Crab Spider (Thomisidae) by Mitochondrial COI and Morphological Character
Geon Ho Kim(김건호),Hye Ri Kim(김혜리),Joo Pil Kim(김주필) 한국거미연구소 2010 한국거미 Vol.26 No.2
계통발생학과 분류학의 보완적인 수단으로 많이 사용되는 분자 마커 중에 미토콘드리아 C0I는 가까운 분류군 간의 진화적 관계을 확인하는데 많이 사용되고 핵 DNA는 먼 분류군 간의 진화적 관계를 확인하는데 많이 사용되고 있다. 본 논문 에서는 처음으로 한국의 게거미를 대상으로하여 미토콘드리아 C0I의 분자 마커에 의한 계통 분류의 효과를 확인해 보았다. 한편으로 Ono(1988)의 논문에 수록되어 있는 게거미의 142개 형태적 형질 자료중 38개의 형질을 선정하여 data ma trix를 만들고 PAUP 의 maximum parsimony analysis로 분석한 phylogeny tree를 만들어 분자적 기법의 계통분류도와 비 교하여 보았다. 그 결과 미토콘드리아 C01에 의한 계통분류도와 많은 유사성을 보임에 따라 게거미의 계통발생에 관한 연구에 효용성이 있음을 확인할수 있었다. Molecular markers have been used to complement many fields in science, such as phylogenetics and taxonomy. The comparison of gene sequences yields a phylogeny tree under the assumption that non-matching base pairs imply a mutation and possibly a speciation. Due to distinct characteristics of each marker, certain molecular marker has worked well on some occasions but not on the others. For instance, mitochondrial DNA is often used to infer evolutionary relationship in close taxa as opposed to some nuclear DNA that is apt to be used in distant taxa analysis. Thus, it has been necessary that scientists test the usefulness of different markers. The objective of this research is to test th efficacy of Mitochondrial COI gene on tracing the evolutionary relationship of Korean crab spiders (Thomisidae Family) for the first time. Mitochondrial COI gene is a standard marker for closely related taxa. In addition. we also built a phylogeny tree using the physical characteristics of the crab spieler species. In this case, we made data matrix with thirty eight morphological characters selected from one hundred forty two characters of Asian crab spielers described in the paper of H. Ono. We analyzed the data matrix with maximum parsimony method using PAUP. The results from two different methods, one relying on molecular biology and another on the morphology showed much correlation confirming the efficacy on phylogenetic study of crab spiders.
김지용 ( Ji-yong Kim ),안경선 ( Kyung-sun Ahn ),김민정 ( Min-jeong Kim ),오재원 ( Jaewon Oh ),방성준 ( Sung-jun Pang ),김건호 ( Keon-ho Kim ),김철기 ( Chul-ki Kim ),심국보 ( Kugbo Shim ),오정권 ( Jung-kwon Oh ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.1
With increasing demands for high-rise timber buildings, Cross Laminated Timber (CLT) is widely used for various structural elements. Due to the complexity in structure, tall timber buildings are extremely difficult to design by hand. Therefore, computer-based structural design is required, and in-plane shear modulus for CLT is necessary as an input. However, test standards or methods for measurement of the in-plane shear modulus of CLT are currently not provided or insufficient. In this study, a method using picture frame is proposed for measuring in-plane shear modulus, since picture frame could transfer crosshead load into the pure shear stress of the specimen. In this research, acrylic sheet, plywood panel and CLT panel were used as test specimens. Load was transferred from the universal testing machine(Instron) to the acrylic sheet and plywood via dowels, CLT via lag screws because of the thickness of the CLT panel. The acrylic sheet, which is an isotropic material, was tested to determine the measuring area and verify pure shear state occurred by the picture frame. Displacements were measured in both directions (active and passive), and both sides (front and back). In-plane shear modulus of acrylic sheet was evaluated with measured displacements and loads to compare with the literature values. The plywood panel was tested to determine the test protocol, and two stage load cycle test protocol was suggested. CLT panel was tested according to the determined measuring area and test protocol. Evaluated in-plane shear modulus of CLT was 693 MPa and it was found that the picture frame test method is appropriate for the stiff massive wood panel.
김지용 ( Ji-yong Kim ),임형석 ( Hyungsuk Lim ),안경선 ( Kyung-sun Ahn ),방성준 ( Sung-jun Pang ),김민정 ( Min-jeong Kim ),심국보 ( Kugbo Shim ),김건호 ( Keon-ho Kim ),김철기 ( Chul-ki Kim ),오정권 ( Jung-kwon Oh ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.2
With increasing demands for high-rise timber buildings, Cross Laminated Timber (CLT) is widely used for various structural elements. Due to the complexity in structure, tall timber buildings are extremely difficult to design by hand. Therefore, computer-based structural design is required, and in-plane shear modulus for CLT is necessary as an input. However, any test standards are not providing even method for measurement of in-plane shear modulus on CLT or other massive wood panels. In this study, a method using picture frame is proposed for measuring in-plane shear modulus. A 20mm thick acrylic sheet was also tested to determine the range of pure shear, using digital image correlation (DIC) technique. Prior to CLT test, load is transferred to the acrylic panel through dowels. Displacements were measured in both directions (active and passive), and both sides (front and back). With measured displacements and loads, in-plane shear modulus was calculated. It was found that the picture frame test method is appropriate for the stiff massive wood panel.