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RISS 인기검색어
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- 저자 : 이전윤(Lee, Jun Yoon) (검색결과 2 건)
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Nanomaterial-enabled Sustainable Advanced Composite Manufacturing
Jeonyoon Lee(이전윤) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Bulk nanostructured materials offer tremendous opportunity for re-inventing materials, but also pose many challenges both in terms of characterization, design, processing, and scaling. This talk will present recent work developing nanoengineered hierarchical advanced composites with enhanced mechanical properties, with a focus on imparting multifunctionality. For example, out-of-oven (OoO) composite manufacturing approach utilizes conductive heating from nanostructured CNT films to conductively, rather than convectively, heating the composite, resulting in 2-3 orders of magnitude reduction in required energy, and opens up new possibilities in areas such as cure sensing. Recent work has also shown that autoclave-required prepregs can be cured without autoclave pressure by utilizing nanoporous networks (NPNs) to provide capillary pressure at ply interfaces, leading to autoclave-quality aerospace-grade composites sans an autoclave, and sans an oven, when combined with OoO curing.
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VR과 EEG를 이용한 천장 높이와 공간 체류 시간에 관한 연구
염상훈(Youm, Sang Hoon),이전윤(Lee, Jun Yoon),최유림(Choi, Yoo Rim) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.2
This study examines the brainwave changes with the increase of ceiling height using VR and EEG devices. Specifically, It takes into consideration the duration of time the user spends in a space. The study attempts to determine as a preliminary study whether the architectural element of the ceiling height as a spatial stimulus can show a significant difference of EEG data in the physiological responses of occupants. In order to quantitatively measure the occupants responses with the increase in ceiling height, a VR space was built, and EEG data were acquired while increasing the ceiling height. Also, to examine the characteristics of brainwave changes concerning the amount of time spent in space, cumulative segments of EEG data were analyzed in 1-second intervals throughout the overall exposure time. Results indicate that when the ceiling height increased from 3m to 9m, there is a relative decrease in the low-frequency brainwaves and an increase in the high-frequency brainwaves. Specifically, this study found a significant change in brainwave activity for the first 5-10 seconds of exposure to ceiling height stimuli. This study demonstrates that VR and EEG can quantifiably identify the temporal effects physiological response according to the increase in the ceilings height, thus expanding the possibility of quantitative research of architectural qualities that can be used to assist the architects design and experience.
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