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신환수(Shin, Hwansoo),조규택(Cho, Gyutaek),성용진(Seong, Yongjin),김영민(Kim, Yungmin),서진식(Seo, Jinsik),김세훈(Kim, Saehoon) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Hyundai motor company has designed a above 50kW-class PEMFC stack for Fuelcell vehicle based on SUV. Hyundai increased the power density of the stack through the optimized flowfield of bipolar plate, manifold structure, and improvement of sealing, etc. Also, Gas to Gas humidifier was adopted in fuelcell system to reduce the system humidification load, it had been proven by short stack test. Components of stack, bilpolar plate, manifold, were analyzed through the computer simulation, so temperature and pressure distribution in the components and system were improved. This stack tested in Bread Board which was organized similar to real vehicle system.
김미하,신환수,제갈미 한국의류학회 2024 Fashion and Textiles Vol.11 No.1
This study developed a wearable device designed to aid visually impaired people (VIP) who are unfamiliar with Braille and/or struggle to learn and use Braille employing the design thinking process. VIP often face challenges in learning and using Braille, and even with existing equipment, including smart technologies, they frequently experience aesthetic and emotional discomfort beyond usability and accessibility. The interdisciplinary research team conducted mixed-method research following the double diamond module of the design thinking process. Initially, qualitative interviews to analyze VIP’s Braille utilization were conducted to derive design factors. Subsequently, identified design factors were applied to conduct experiments with appropriate embroidery methods and connection structures using MXene-coated yarn. The strategies effectively enhanced pressure sensing performance by two times and realized highly localized and independent sensing to enable Braille recognition. Finally, a specific design for the wearable Braille recognition glove was proposed that incorporated these findings. The proposed wearable glove, equipped with a high-performance Braille recognition sensor, is designed to enhance the psychological and aesthetic satisfaction of VIP. The glove’s universal design and accompanying technical support allow VIP to maintain their existing Braille reading methods while enjoying enhanced performance and avoiding social stigmas.
PFMFC 에서 CO 의 선택적 산화반응을 위한 Au / CeO2 촉매의 개발
이호인,남석우,임태훈,홍성안,신환수,정창렬,한종희 한국공업화학회 2001 응용화학 Vol.5 No.2
Au/MOx(M=metal) were used as effective catalysts for preferential oxidation (PROX) of carbon monoxide in the presence of excess hydrogen. In this study, as the support of Au catalyst, CeO₂ which had small crystallite size showed high activity for PROX. XPS studies showed that metallic gold was formed when catalysts were reduced by hydrogen and it was active species. Furthermore, Au particle size should be decreased in order to give high activity being confirmed through XRD and TEM studies. TPR data also showed that the highly active catalyst having well-dispersion had higher reducibility than the others.