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Hwang, Gaeun,Park, Hyungmin,Bok, Taesoo,Choi, Sinho,Lee, Sungjun,Hwang, Inchan,Choi, Nam-Soon,Seo, Kwanyong,Park, Soojin The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.21
<P>Nanostructured micrometer-sized Al-Si particles are synthesized via a facile selective etching process of Al-Si alloy powder. Subsequent thin Al2O3 layers are introduced on the Si foam surface via a selective thermal wet oxidation process of etched Al-Si particles. The resulting Si/Al2O3 foam anodes exhibit outstanding cycling stability (a capacity retention of 78% after 300 cycles at the C/5 rate) and excellent rate capability.</P>
Mucosa-Associated Lymphoid Tissue Lymphoma of the Cheek Mimicking Benign Entities: a Case Report
Hwang, Hyun,Shin, Jae Ho,Ihn, Yon Kwon,Han, Sungjun,Park, Hong Sik Korean Society of Magnetic Resonance in Medicine 2021 Investigative Magnetic Resonance Imaging Vol.25 No.2
The prevalence of cheek lymphoma, especially a mucosa-associated lymphoid tissue lymphoma (MALT), is very rare. Non-specific symptoms and image findings of cheek lymphoma may mimic benign entities and make it difficult to diagnose. In this case report, we present a case of MALT lymphoma of the cheek mimicking benign entities on computed tomography and magnetic resonance imaging.
Hwang, In-Sung,Kim, Jae-Chan,Seo, Seung-Deok,Lee, Sungjun,Lee, Jong-Heun,Kim, Dong-Wan The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.56
<P>Germanium (Ge) nanoparticle–multiwalled carbon nanotube (MWCNT) anodes are fabricated through the anchoring of Ge on the surface of electrophoretically pre-deposited MWCNT networks <I>via</I> a thermal evaporation process. This Ge–MWCNT nanocomposite displays a large reversible capacity of over 800 mA h g<SUP>−1</SUP> at 1 C even after 200 cycles.</P> <P>Graphic Abstract</P><P>Ge nanoparticle–multiwalled carbon nanotube electrodes are prepared <I>via</I> electrophoretic deposition, followed by the chemical vapor deposition process for Li ion batteries. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc32901h'> </P>
Kim, Sungjun,Jang, Segeun,Kim, Sang Moon,Ahn, Chi-Yeong,Hwang, Wonchan,Cho, Yong-Hun,Sung, Yung-Eun,Choi, Mansoo Elsevier Sequoia 2017 Journal of Power Sources Vol. No.
<P><B>Abstract</B></P> <P>This work reports the successful reduction in methanol crossover by creating a thin cracked metal barrier at the interface between a Nafion<SUP>®</SUP> membrane and an electrode in direct methanol fuel cells (DMFCs). The cracks are generated by simple mechanical stretching of a metal deposited Nafion<SUP>®</SUP> membrane as a result of the elastic mismatch between the two attached surfaces. The cracked metal barriers with varying strains (∼0.5 and ∼1.0) are investigated and successfully incorporated into the DMFC. Remarkably, the membrane electrode assembly with the thin metal crack exhibits comparable ohmic resistance as well as reduction of methanol crossover, which enhanced the device performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A thin, cracked metal layer on PEM is fabricated by simple method. </LI> <LI> The cracked metal layer reduces fuel crossover without affecting PEM conductivity. </LI> <LI> A MEA with the layer shows superior performance compared to conventional one. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
차량의 롤각 감소를 위한 ARS 제어 로직 설계 및 실차를 이용한 성능 평가
문성준(Sungjun Moon),김선희(Sunhee Kim),함승근(Seunggeun Ham),송현정(Hyunjeong Song),황윤권(Yoonkwon Hwang),박기홍(Kihong Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Developed in this research is a control logic for the ARS(Active Roll Stabilization) system that uses rotary-type hydraulic stabilizer bars. The hydraulic driver component of the system was modeled and designed using AMESim and its simplified Simulink model that captures the systems nonlinear characteristics was also constructed for faster simulation. The control logic consists of: a feedforward controller that generates anti-roll moments in response to the lateral acceleration, and a feedback controller that forces the roll angle to track its target value. Estimators were also designed so that the controller takes as input estimated values of the lateral acceleration and the roll angle. The developed ARS control logic was first evaluated via simulation and later it was ported to a microcontroller for validation on a test vehicle. The results showed that the roll angle could be decreased to the targeted levels.