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한경진(Kyungjin Han),이종원(Jongweon Lee) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2
현재까지 보편적으로 사용해오던 QWERTY 레이아웃을 따르는 문자 입력 방식은 몇몇의 대응기기의 사용성 측면에 있어 적절치 못한 경우가 존재한다. 본 논문에서는 카메라 비전 인식을 기반으로 하는 사용자의 제스처 인식을 응용하여 직관적인 비접촉식 한글 입력 시스템을 제안한다. 문자 입력 시점에서 사용자가 직면한 제한된 상황의 사용성과 다른 기기로의 유연한 접목에 대한 가능성을 제시한다.
Choe, Han Kyoung,Son, Gi Hoon,Chung, Sooyoung,Kim, Myungjin,Sun, Woong,Kim, Hyun,Geum, Dongho,Kim, Kyungjin Informa Healthcare 2011 Stress Vol.14 No.2
<P>The environment of a pregnant mother has a life-long impact on later life of offspring. Maternal stress is known to cause low birth weight and programs several physiological dysfunctions in offspring. However, the direct effects of maternal stress on the developing fetus remain largely unknown. The present study focused on the effect of chronic maternal stress on the developmental program and its molecular mechanisms. Pregnant mice were given 6-hour immobilization stress every day from 8.5 days post coitum. Fetal body weight was significantly decreased by maternal stress throughout development. Importantly, developmental events were retarded in the stressed fetuses. Around embryonic day 13.5 (E13.5), the developmental increment of somite numbers was delayed, although this difference recovered by E15.5. Limb bud formation and regression of interdigital webbing were also retarded by approximately 0.5 days. Subsequently, transcriptomes of developing limbs were analyzed by cDNA microarrays. Approximately, one-tenth of detected transcripts were significantly influenced by maternal stress. Q-PCR AQ analyses further demonstrated that the expression of a subset of limb development-associated genes, including Igf1, Aldh1a2, and Acta1, was changed in the stressed fetus. In conclusion, our findings suggest that maternal stress can retard limb and somite development in mice, with profound impacts on the developmental genetic program of limb.</P>
고고도 모사용 축소형/실물형 디퓨저의 유동 특성에 대한 수치적 연구
임경진(Kyungjin Yim),고현진(Hyunjin Go),김홍집(Hongjip Kim),고영성(Youngsung Ko),한영민(Yeong-min Han) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
A numerical study has been conducted to investigate flow characteristics of sub-/full-scale diffusers for high altitude simulation. Properties of Burnt gas have been included to provide basic information for thermal cooling which is the essential design parameter of the diffuser. Various geometric configurations of the subscale diffuser have been implemented by changing diffuser entrance, the second throat, and subsonic diffuser lengths. Vacuum pressure has been checked to select optimal configuration of the subscale diffuser. Based on these results, flow characteristics of a full-scale diffuser with hot condition have been also investigated. There were high temperature regions over 3000 K especially near wall and subsonic diffuser. If the diffuser did not operate normally, gases of high temperature may be entrained to the vacuum chamber. After the normal start-up, vacuum chamber was choked by supersonic flow and only the small amount of high-temperature gas was entrained. Consequently, cooling system should be included and designed carefully to achieve thermal survivability of the diffuser.