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Depth 및 RGB Camera를 이용한 인체 관절부위 측정에 대한 연구
안영샘(Y. S. Ahn),권순원(S. W. Kwon),주성수(S. S. Joo),김원진(W. J. Kim),박은식(E. S. Park),이상민,권장우(J. W. Kwon) 한국재활복지공학회 2017 한국재활복지공학회 학술대회논문집 Vol.2017 No.11
In this paper, We developed joint-motion detect program using a Depth Camera of Microsoft KinectV2. Recently, patients can easily access various information about medical care and thus the knowledge level of medical care is increasing. And patients expect to be informed through objective data rather than by a doctor"s diagnosis. Although each facility has a variety of equipment to show these objective data to patients, it is complex and tricky for patients to easily understand. And because these devices are mostly expensive, small hospitals such as private hospitals which is true that it is burdensome. This program makes it easier to see the patient"s body condition without the expensive equipment. The experimental result shows that the error is within 3% of the actual measurement method. It brings accurate data according to individual physical characteristics. It supports joint related medical equipment and has good usability and reliable recognition rate.
The Characteristics of SOI n-MOSFET's by Bonding and Etch-Back Technology
Kang, S. W.,Kang, W. G.,Ahn, K. Y.,Yu, H. K.,Yun, S. J.,Yi, K. S.,Cho, D. H.,Kang, S. W. 대한전자공학회 1991 ICVC : International Conference on VLSI and CAD Vol.2 No.1
Silicon-on-insulator (SOI) substrates are prepared by silicon direct banding (SDB) and etchback processes and nMOSFET's of enhancement mode are fabricated on the SOI substrates. Active areas are defined by modified local oxidation of silicon (LOCOS) which also provides isolation. The silicon film of SOI is 0.25㎛ thick. The transistor is farmed using a self-aligned n ^+ polysilicon gate NMOS processes.
Jeon, G. S.,Nakamura, T.,Lee, J. S.,Choi, W. J.,Ahn, S. W.,Lee, K. W.,Sung, J. J.,Lipton, S. A. HUMANA PRESS INC 2014 Molecular neurobiology Vol.49 No.2
Aggregation of misfolded protein and resultant intracellular inclusion body formation are common hallmarks of mutant superoxide dismutase (mSOD1)-linked familial amyotrophic lateral sclerosis (FALS) and have been associated with the selective neuronal death. Protein disulfide isomerase (PDI) represents a family of enzymatic chaperones that can fold nascent and aberrant proteins in the endoplasmic reticulum (ER) lumen. Recently, our group found that S-nitrosylated PDI could contribute to protein misfolding and subsequent neuronal cell death. However, the exact role of PDI in the pathogenesis of ALS remains unclear. In this study, we propose that PDI attenuates aggregation of mutant/misfolded SOD1 and resultant neurotoxicity associated with ER stress. ER stress resulting in PDI dysfunction therefore provides a mechanistic link between deficits in molecular chaperones, accumulation of misfolded proteins, and neuronal death in neurodegenerative diseases. In contrast, S-nitrosylation of PDI inhibits its activity, increases mSOD1 aggregation, and increases neuronal cell death. Specifically, our data show that S-nitrosylation abrogates PDI-mediated attenuation of neuronal cell death triggered by thapsigargin. Biotin switch assays demonstrate S-nitrosylated PDI both in the spinal cords of SOD1 (G93A) mice and human patients with sporadic ALS. Therefore, denitrosylation of PDI may have therapeutic implications. Taken together, our results suggest a novel strategy involving PDI as a therapy to prevent mSOD1 aggregation and neuronal degeneration. Moreover, the data demonstrate that inactivation of PDI by S-nitrosylation occurs in both mSOD1-linked and sporadic forms of ALS in humans as well as mice.
Park, J. S.,Kim, D. J.,Park, J. W.,Ryu, H. S.,Kim, K. W.,Wang, G. X.,Ahn, H. J. American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.7
<P>An elemental sulfur and multi-walled carbon nanotube (S-MWNT) composite was synthesized by dissolving sulfur in ammonium sulfides and then precipitating on MWNT. Morphology observation by scanning electron microscopy (SEM) confirmed that S-MWNT product was successfully prepared by incorporating sulfur into MWNT network. Without additional conducting material, the S-MWNT composite cathodes were prepared for electrochemical tests. The properties measured in discharge-charge cycling test showed that the composite had the initial discharge capacity of 1024 mAh g(-1), which is about 61% sulfur utilization. However, in the subsequent cycling, the capacities faded. To determine the reason of rapid capacity drop, S-MWNT composite cathodes were compared in the cycling tests with varying three kinds of electrolytes and the cathode was subjected to physical force by rolling. The changes in the cycle performances proved that the deterioration of S-MWNT composite cathodes was not related to the electrolytes but to physical bonding that may not maintain the conducting path between sulfur and MWNT.</P>
박창순(C. S. Park),안선응(S. E. Ahn),신완선(W. S. Shin),유진성(J. S. Ryu),박재우(J. W. Park),우문규(M. K. Woo) 한국산업경영시스템학회 2008 한국산업경영시스템학회지 Vol.31 No.2
Most organizations have recently put more emphasis on the improvement in service quality. This phenomenon could come from the recognition that service quality plays an essential role in enhancing organization"s business performance. Hence this paper presents a framework for improving such service quality. The presented framework involves the methodology for (ⅰ) developing service quality indices, (ⅱ) measuring and evaluating service quality, (ⅲ) analyzing the level of service quality, (ⅳ) constructing the quality improvement road map, (ⅴ) determining the quality improvement action plan. This methodology is intended to create self-sustaining improvement in service quality from the entire organization"s perspective. An illustration is also given.
Lee, H.,Kang, W. S.,Ahn, M. I.,Cho, K.,Lee, J. H. Springer Science + Business Media 2016 International journal of biometeorology Vol.60 No.1
<P>Climate change could shift the phenology of insects and plants and alter their linkage in space and time. We examined the synchrony of rice and its insect pest, Scotinophara lurida (Burmeister), under the representative concentration pathways (RCP) 8.5 climate change scenario by comparing the mean spring immigration time of overwintered S. lurida with the mean rice transplanting times in Korea. The immigration time of S. lurida was estimated using an overwintered adult flight model. The rice transplanting time of three cultivars (early, medium, and medium-late maturing) was estimated by forecasting the optimal cultivation period using leaf appearance and final leaf number models. A temperature increase significantly advanced the 99 % immigration time of S. lurida from Julian day 192.1 in the 2000s to 178.4 in the 2050s and 163.1 in the 2090s. In contrast, rice transplanting time was significantly delayed in the early-maturing cultivar from day 141.2 in the 2000s to 166.7 in the 2050s and 190.6 in the 2090s, in the medium-maturing cultivar from day 130.6 in the 2000s to 156.6 in the 2050s and 184.7 in the 2090s, and in the medium-late maturing cultivar from day 128.5 in 2000s to 152.9 in the 2050s and 182.3 in the 2090s. These simulation results predict a significant future phenological asynchrony between S. lurida and rice in Korea.</P>
Agostini, M.,Lim, D.-H.,Sadd, M.,Hwang, J.-Y.,Brutti, S.,Heo, J. W.,Ahn, J. H.,Sun, Y. K.,Matic, A. Wiley (John WileySons) 2018 ChemSusChem Vol.11 No.17
<P>We report a new Li-S cell concept based on an optimized F-free catholyte solution and a high loading nanostructured C/S composite cathode. The Li2S8 present in the electrolyte ensures both buffering against active material dissolution and Li+ conduction. The high S loading is obtained by confining elemental S (approximate to 80%) in the pores of a highly ordered mesopores carbon (CMK3). With this concept we demonstrate stabilization of a high energy density and excellent cycling performance over 500 cycles. This Li-S cell has a specific capacity that reaches over 1000 mA hg(-1), with an overall S loading of 3.6 mg cm(-2) and low electrolyte volume (i.e., 10 mu L cm(-2)), resulting in a practical energy density of 365 Wh kg(-1). The Li-S system proposed thus meets the requirements for large scale energy storage systems and is expected to be environmentally friendly and have lower cost compared with the commercial Li-ion battery thanks to the removal of both Co and F from the overall formulation.</P>
Lee, Y.R.,Cho, S.M.,Ahn, W.S.,Lee, C.H.,Lee, K.H.,Cho, W.S. Elsevier 2015 Microporous and mesoporous materials Vol.213 No.-
A densely-packed IRMOF-3 membrane (S-IRMOF-3(Mem)), ~55 μm in thickness, on an Al<SUB>2</SUB>O<SUB>3</SUB> disc support was prepared via a sonochemical synthesis route, and the optimal fabrication conditions were established. Bare IRMOF-3 particles (S-IRMOF-3(p)) were synthesized independently to analyze the contribution of the Al<SUB>2</SUB>O<SUB>3</SUB> support. The overall physicochemical properties of the IRMOF-3 products produced via the sonochemical route were superior to those prepared by microwave heating. The IRMOF-3 materials produced were characterized by XRD, SEM, EDS-mapping, and N<SUB>2</SUB> adsorption-desorption measurements. S-IRMOF-3(p) exhibited satisfactory CO<SUB>2</SUB> adsorption capacities (54 mg/g at 298 K/1 bar; 732 mg/g at 298 K/20 bar) and CO<SUB>2</SUB>/N<SUB>2</SUB> selectivity (18 at 298 K/1 bar). Both S-IRMOF-3(Mem) and S-IRMOF-3(p) were assessed as a catalyst for a liquid phase Knoevenagel condensation reaction between benzaldehyde and ethyl cyanoacetate. S-IRMOF-3(Mem) and S-IRMOF-3(p) showed comparable conversions (87-89%) with 100% selectivity after a 4 h reaction at 333 K. The heterogeneous nature of the catalyst was confirmed by a hot filtering experiment, and S-IRMOF-3(Mem) could be recovered easily after the reaction and be recycled several times with little change in product yield.