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김흥식,김인수,홍금희,김남영,박광서,김정유,박완근 江原大學校 森林科學硏究所 2003 Journal of Forest Science Vol.19 No.-
2002년 3월부터 2003년 10월까지 유명산 자연휴양림을 대상으로 식물상과 산림군락구조를 조사한 결과, 관속식물이 98과 331속 570종 1아종 81변종 4품종 2교잡종으로 총 658종류로 나타났으며, 한국특산식물은 10과 14속 13종 2변종 1교잡종 총 16종류. 희귀 및 멸종위기식물은 9과 10속 11종 총 11종류, 귀화식물은 12과 22속 28종 총 28종류로 나타났다. 산림군락은 신갈나무-철쭉군목, 신갈나무-생강나무군단, 소나무-산거울군락, 잣나무-주름조개풀군락, 물푸레나무-신갈나무군락, 층층나무-신갈나무군락, 굴참나무-신갈나무군락, 싸리-신갈나무군락으로 전체 1군목, 1군단, 6군락이 분포하는 것으로 나타났다. The study was carried out to investigate the flora and community classification of forest vegetation in Mt. Yumyeong from March, 2002 to October, 2003. As a result of that, the vascular plants were 98 families, 331 genera, 570 species. 1 subspecies, 81 varieties, 4 formae, 2 hybrid, 658 taxa in all. Korean endemic plants were 10 families, 14 genera, 13 species, 2 variaties, 1 hybrid. 16 taxa in all ;, rare and endangered plants were 9 families, 10 genera. 11 species, 11 taxa in all ; naturalized plants were 12 families, 22 genera, 28 species, 28 taxa in all. The forest vegetation was classified into 1 order, 1 alliance. 6 communities : Rhododendro - Quercetalia mongolicae (Kim, 1990) Lindero - Quercion mongolicae (Kim, 1990) A. Carex humilis var. nana - Pinus densiflora Community B. Oplismenus undulatifolius - Pinus koraiensis Community C. Fraxinius rhynchophylla - Quercus mongolica Community D. Cornus controversa - Quercus mongolica Community E. Quercus variabilis - Quercus mongolica Community F. Lespedeza bicolor - Quercus mongolica Community
UML 역공학 프로세스 모델링을 이용한 Jetspeed 사용자 인터페이스 분석
오동식,구흥서 청주대학교 산업과학연구소 2005 産業科學硏究 Vol.22 No.3
Reverse Engineering of software is the process of constructuring high level specifications from lower level instantiations of an existing software system. While extracting design specification from source code have had some success in Logical view of the UML, they are unlikely to be able to completely extract Design Diagrams of UML. Because source code does not represent all of Design Information an effort to recover Design Specifications from an existing software system have limitation. To address this problem, this paper describes User-Interface based Reverse Engineering to improve Extracting the UML Diagrams.
김태식,구흥서 청주대학교 산업과학연구소 2005 産業科學硏究 Vol.22 No.3
Grid computing enables the virtualization of distributed computing and data resources such as processing, network bandwidth and storage capacity to create a single system image, granting users and applications seamless access to vast IT capabilities. As many researchers have been interested in Grid Technology, they have also focused their attention on PSE where users use Grid easily. Grid Portal, one of PSEs, provides users with web interface so that they will easily run their jobs using Grid. Many grid portals are currently being serviced. We classified the existing grid portals into Grid Information Portals and Grid Application Portals according to functional distinctions. We then studied and surveyed representative grid portals that belong to GIP and GAP
오스템퍼링 처리한 구상흑연주철의 절삭시 공구마멸에 관한 연구
전태옥,박흥식,예규현,서영백 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-
This study was carried out to investigate the character ot cutting tool's wear by acoustic emission(AE) in machining austempered ductile iron(ADI). The following results have been obtained. (1) Ceramic tool among tools of P20, NC123K and ceramic had the best performance in machining ADI materials. (2) As cutting speed increased, the amplitude level of AE signal increased. (3) The In-process detection of cutting tool's wear in able to by use of AE signals. (4) In initial of cutting, surface roughness was large effect to the flank wear to some range.
이광영,옥철호,서영백,박흥식,전태옥 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2
This study has been carried out to prevent and decrease the grinding burr under various working conditions; number of grinding passes, depth of cut, hardness of the materials and work speed. Grinding wheel is WA grinding wheel and workpieces are SM45C, SS41, SCM23 and STS 304. The results of tained from this study are as follows; The length of gringing burr increased with increasing grinding passes and it has nothing to do with materials and heat treatment. The size of grinding burr increased with increasing grinding depth and feed speed. The size of grinding burr decreased with increased cross setion and of workpiece. According as the hardness of material was increased, the width of grinding burr decreased conspicuously owing to suppression of plastic zone of burr root part.
SM45C의 Laser 표면개질 조건에 따른 마멸특성에 관한 연구
옥철호,임동욱,서영백,박흥식,전태옥 동아대학교 생산기술연구소 2000 生産技術硏究所硏究論文集 Vol.5 No.1
Surface modification of plain carbon steel (SM45C) by Laser are usually much finer and stronger than the base metals. Nd-YAG laser source changes and refines the microstructure of the near surface layer, leading to enhanced hardness and wear resistance. The present study was undertaken to investigate the wear behavior and a processing parameters such as, power density, pulse width, defocusing distance, and molten depth for surface modification. The wear test was carried out under different experimental condition using the wear test device and the annular surfaces of wear test specimens as well as mating specimen of alumina ceramics(Al_2O_3) was rubbed in dry sliding condition. The results show that molten depth and width depend on defocusing distance. The wear loss was much in lower speed range below 0.2m/sec and in higher speed range above 0.7m/sec, but It was little in intermediate speed range. It depends on oxidation and wear speed.
베효준,조연상,김동호,서영백,박흥식 동아대학교 생산기술연구소 2000 生産技術硏究所硏究論文集 Vol.5 No.2
The wear particles is released from the moving surfaces in gear systems of transmission and its morphology is directly related to the damage and failure to gear systems from which the particles originated. It is the effective method to diagnosis damage process of gear systems of automobile transmission to observe wear particle in gear oil. We tested with new transmission and took out gear oil according to drive distance. To be applied to damage diagnosis of gear system in transmission of automobile, 4 shape parameters of wear particles in gear oil were calculated and wear volume were presumed with the image processing system.
THE EFFECT OF ACUTE TOLUENE EXPOSURE ON HIPPOCAMPAL NEUROGENESIS IN ADULT RATS
Heung-Sik Seo,Young-Su Yang,Jinsoo Lee,Min-Sung Kang,Soonjin Kwon,Seong-Jin Choi,Soo-Nam Kim,Byeong-Chan Lee,Hyo-Seon Yang,Young-Ah Han,Hee-Jin Yu,Jae-Hwan Kim,Jin-Hee Lee,Jeong-Ah Song,Kyung Jin Jung 한국환경독성학회 2009 한국독성학회 심포지움 및 학술발표회 Vol.2009 No.11