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임우현(Woo Hyun Lim),민병열(Byung Yeol Min),최문식(Mun Shik Choi),김규석(Kyu Suk Kim) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
The problem of large concentrated forces acting over limited areas of concrete is one of frequent occurence in civil engineering design. Steel base plates of stanchions over concrete footing, anchorages in post-tensioned concrete beams, shear keys in composite structures, concrete beams at bearing, bridge bearings over piers, concrete hinges and bearing blocks, beams over walls and concrete columns and pile heads, etc., are a few instances of bearing problems. The experimental studies for bearing strength of concrete were reported so far by previous investigators, and the formulars were recommended in codes of practice of various countries. In this study, the obtained results of the test are presented. The results show that the major testing parameters are the ratio of bearing area to the concrete area and the size of specimen.
Reed-Solomon부호의 복호를 위한 수정 유클리드 알고리즘의 효율적인 반복 셀 구조
김우현,이상설,송문규,Kim, Woo-Hyun,Lee, Sang-Seol,Song, Moon-Kyou 대한전자공학회 1999 電子工學會論文誌, C Vol.c36 No.1
Reed-Solomon(RS) 부호는 CD-ROM, HDTV, ATM 그리고 디지털 VCR 등 여러 분야에서 연집(burst) 오류를 정정하기 위해 적용되어 왔다. RS 부호를 복호하기 위해서는 Berlekamp-Massey 알고리즘, 유클리드 알고리즘 그리고 수정 유클리드 알고리즘(MEA)이 개발되었다. 최근에는 이들 중에서도 MEA가 가장 자주 사용되었다. 본 논문은 부호의 복호에 사용되는 MEA을 위한 효율적인 반복 셀 구조를 제안한다. 제안된 구조의 두 가지 주된 특징은 다음과 같다. 첫째, MEA의 수행에 있어 기존의 방법[1] 보다 약 25% 적은 수의 클럭 사이클을 이용한다. 둘째, MEA 수행에 소비되는 클럭 사이클의 수가 부호의 길이 n보다 큰 경우 MEA 셀의 개수를 줄일 수 있었으며, 수신된 워드를 위한 버퍼 요구량 또한 줄일 수 있었다. 예로써 (128,124) RS 부호에 대한 MEA 회로가 VHDL을 통하여 기술되고 검증된다. Reed-Solomon(RS) codes have been employed to correct burst errors in applications such as CD-ROM, HDTV, ATM and digital VCRs. For the decoding RS codes, the Berlekamp-Massey algorithm, Euclidean algorithm and modified Euclidean algorithm(MEA) have been developed among which the MEA becomes the most popular decoding scheme. We propose an efficient recursive cell architecture suitable for the MEA. The advantages of the proposed scheme are twofold. First, The proposed architecture uses about 25% less clock cycles required in the MEA operation than[1]. Second, the number of recursive MEA cells can be reduced, when the number of clock cycles spent in the MEA operation is larger than code word length n. thereby buffer requirement for the received words can be reduced. For demonstration, the MEA circurity for (128,124) RS code have been described and the MEA operation is verified through VHDL.
김우현 ( Woo-hyun Kim ),권태룡 ( Tae-ryong Kwon ),김용균 ( Yong-gyun Kim ),권순욱 ( Soon Wook Kwon ),오연이 ( Youn-lee Oh ),강민구 ( Min-gu Kang ) 한국균학회 2017 韓國菌學會誌 Vol.45 No.4
Pseudomonads cause bacterial brown blotch disease, which causes great damage to the common mushroom Agaricus bisporus. The tolerance of A. bisporus to pseudomonads was tested and found to not be correlated with mycelium growth ability. The offsprings of the tolerant strain (ASI1085) to pseudomonads were not as tolerant as their parents in the mycelium stage. But, tolerance decreased compared to mycelium in the fruiting body. The offsprings of the weakly tolerant strain (ASI1321) were even more weak in the mycelium stage. It is presumed that the tolerance of the parents is transferred to later generations. The tolerance in the mycelium was not correlated in the fruiting body. Therefore, the browning of the fruiting body is thought to be induced by other factors. Pseudomonas tolaasii caused higher browning than Pseudomonas agarici. Pseudomonas reactans did not have a significant effect on the mycelium, but affected the browning of the fruit bodies. P. agarici had higher ability to inhibit mycelium growth than fruiting body growth.
김우현(Kim Woo Hyun),김경남(Kim Kyoung Nam) 대한치과의사협회 2010 대한치과의사협회지 Vol.48 No.2
Titanium and titanium alloys are the most common materials used for dental and biomedical implants, owing to their biocompatibility and favourable mechanical properties. However infection of the region surrounding a dental implant by pathogenic microorganisms is a significant factor in implant failure. Prevention and control of microbial colonization of implant surfaces is considerable interest to the biomedical community. One important strategy is to render the implant surface antibacterial by impeding the formation of biofilm. A number of approaches have been proposed for this purpose. Therefore, we reviewed the researches of antibacterial coatings on titanium implants in this articles.
기하학적 모델 및 색상 모델에 기반한 이동물체 추적에 관한 연구
김우현(Woo-hyun Kim),기창두(Chang-doo Kee) 한국자동차공학회 2003 한국자동차공학회 지부 학술대회 논문집 Vol.2003 No.5
As there have been many interests about a real-time detection in a face recognition field, the research of face detection is being progressed lively through skin-color model for quick processing. However, if the color of background and skin-color is almost alike, unexpected recognition will happen. Also, face recognition which is a important field of pattern-recognition includes complex difficulty like size, shape, and position of target object, background, and lighting, but the faces give us wide information like inherent face-color, head movement, face shape, eyes, a nose, a lip.<br/> Using this much information, we present face-tracking method in this paper by combining skin-color chaser and ellipse chaser in given conditions.<br/> We use ellipse chaser as the first algorithm, and skin-color chaser which has human's skin-color. By experiment using two chasers, this algorithm shows robustness in face-tracking<br/> <br/>
한옥의 유지관리를 위한 정보체계 구축 방안에 대한 기초 연구
김우현(Kim Woo-Hyun),임재복(Lim Jae-Bok),김주형(Kim Ju-Hyung),김재준(Kim Jae-Jun) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Nowadays, it is usual to build new Han-Ok, developed Han-Ok, Han-Ok like buildings. In this situation, it needs to study for the way of conservation of Korean traditional Han-Ok. Traditional Han-Ok is not too different from the other Han-Oks above in process. However, there is a primary difference between them. It is data conservation. In the past, Han-Oks were used to be built without any architectural plans, so it could be easy to be in trouble for maintenance. From the problem, this study starts with the purpose of figuring out the method for the maintenance of Han-Ok by BIM.