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Ni계 산화물 분산 강화 합금의 방향성 재결정에 미치는 존 어닐링 속도의 영향
김영균,윤성준,박종관,김휘준,공만식,이기안,Kim, Young-Kyun,Yoon, Seong-June,Park, Jong-Kwan,Kim, Hwi-Jun,Kong, Man-Sik,Lee, Kee-Ahn 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.4
This study investigates the directional recrystallization behavior of Ni based oxide dispersion strengthened (ODS) alloy according to the zone annealing velocity. The zone annealing temperature is set as $1390^{\circ}C$, while the zone velocities are set as 2.5, 4, 6, and 10 cm/h, respectively. The initial microstructure observation of the as-extruded sample shows equiaxed grains of random orientation, with an average grain size of 530 nm. On the other hand, the zone annealed samples show a large deviation in grain size depending on the zone velocities. In particular, grains with a size of several millimeters are observed at 2.5-cm/h zone velocity. It is also found that the preferred orientation varies with the zone annealing velocity. On the basis of these results, this study discusses the role of zone velocities in the directional recrystallization of Ni base ODS alloy.
김영균,Kim, Young-Kyun 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.1
This study evaluated the use of endoscopy to examine jaw cysts during the operation. Fifteen jaw cysts were explored with a endoscope immediately before and after enucleation. Endoscopic findings were evaluated and recorded with video tape. Before enucleation, there were many white fibrous floating materials within the cystic cavity. Cystic lining showed smooth and regular appearance with capillary network. However, there were some fibrous scar tissues and irregular architecture in preoperative infection. After enucleation, there were white shiny bony surfaces with fresh vascular network. In some cases, floating fibrous tissues remained after removal.
NEV구동용 10㎾급 영구자석동기전동기 설계 및 특성해석
김영균,유세현,정인성,신덕식,김대경,장정철 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper presents high efficiency IPMSM design and analysis for NEV having the operation speed of 2400rpm and 6000rpm.
김영균 청주대학교 인문과학연구소 2020 人文科學論集 Vol.60 No.-
This article is an attempt to elucidate the meaning that the soul-care Socrates emphasized all his life bears in his moral philosophy. Both ancient Greeks and most of us are trying to obtain more wealth, honor, power, etc., but Socrates’ basic belief was that the pursuit of these things is far from the good way of life. Instead he rather emphasized the soul-care, and it was to call for the fundamental turnabout in our cognition of the way of life. Contrary to the traditional understanding of the ancient Greeks, he understood the soul as a reason-owning moral subject and believed that human goodness is possible only through the cognition of ‘objective good’ by reason. This belief is well implied by his famous assertion that “goodness(virtue) is knowledge.” For the caring of the soul it is above all else needed for us to know that we are ignorant of ‘human goodness’. Knowledge of our ignorance is first and foremost required in order to know what is truly good for us; it is very important for the fundament reflection on one’s own way of life as well. And excessive desires in pursuit of pleasures are most harmful to our soul since they distort and disturb our cognition of the good, misleading us awry. Caring of the soul in good shape involves enabling the soul to exert its faculties as a moral subject that owns reason.