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Standardization Trends for Carbon Nanotubes
Kyung-Hui Oh 한국탄소학회 2009 Carbon Letters Vol.10 No.1
In this work, standardization trends related carbon nanotubes and international standardization activities in the ISO/TC229 and IEC/TC113 were introduced. The movement toward development of carbon nanotube standard began in the nanotechnology council under the IEEE in 2005. KATS has also run the carbon nanotube standardization committee to support commercialization of product containing carbon nanotube through standards since 2004. The Korean Standards such as KSD2711, 2712, 2717 were established.
Android 모바일 응용을 위한 계획 실행 모델의 설계 및 구현
오휘경 ( Hui-kyung Oh ),정종근 ( Jong-geun Jung ),박찬영 ( Chan-young Park ),김인철 ( In-cheol Kim ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2
본 논문에서는 스마트폰 환경에서 개인 사용자 편의 서비스 프로그램 개발의 기초가 되는 작업 계획 모델 및 실행 모델을 제시하고, 이 모델을 활용하여 Android 플랫폼에서 개발된 자동 작업 실행 체계인 Smart Script 시스템의 설계와 구현에 대해 소개한다.
가우시안 프로세스를 이용한 실내 환경에서 WiFi 위치 추정
오휘경(Hui-Kyung Oh),김인철(In-Cheol Kim) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.10
최근 들어 GPS를 이용하기 어려운 실내 환경에서 이동 단말기나 로봇의 위치를 추정하기 위해 WiFi 신호 강도 데이터를 이용하는 연구들이 매우 큰 관심을 모으고 있다. 본 논문에서는 WiFi 신호 측정치의 불안정성과 불확실성에 효과적인 가우시안 프로세서를 적용하여, 실내에서 이동 중인 스마트폰 사용자의 실시간 위치를 추정하는 방법을 제안한다. 실험을 통해 제안한 방법의 성능을 분석해보고, 성능 개선을 위한 확장 방안을 제시한다. Recently there has been significant interest on the works to use WiFi signal strength data for positioning mobile devices or mobile robots in an indoor environment where it is hard to use GPS. In this paper, we propose a localization method to estimate the real-time position of a smartphone user roaming in an indoor environment by using Gaussian processes, which are much effective for dealing with unstability and uncertainty of WiFi measuments. Through experiments, we analyze the performance of our approach, and then discuss some future improvements.
(Kyung Jin Kim),(Wan Joo Shim),(Seong Won Jung),(Hui Nam Pak),(Soo Jin Lee),(Woo Hyuk Song),(Young Hoon Kim),(Hong Seog Seo),(Dong Joo Oh),(Young Moo Ro) 대한내과학회 2002 The Korean Journal of Internal Medicine Vol.17 No.2
N/A Background: Several studies suggested that T-wave normalization (TWN) in exercise ECG indicates the presence of viable myocardium. But the clinical implication of this phenomenon in patients with acute myocardial infarction who received proper revascularization therapy was not determined. Precisely the aim of this study was to investigate the relationship between TWN in exercise ECG and myocardial functional recovery after acute myocardial infarction. Methods: We studied 30 acute myocardial infarction patients with negative T waves in infarct related electrocardiographic leads and who had received successful revascularization therapy. Exercise ECG was performed 10∼14days after infarct onset using Naughton protocol. Patients were divided into 2 groups according to presence (group I; n=14) or not (group II; n=16) of TWN in exercise ECG. Exercise parameters and coronary angiographic findings were compared between groups. Baseline and follow-up (mean 11 months) regional and global left ventricular function was analyzed by echocardiography. Results: Exercise parameters were similar between groups. There was no difference in baseline ejection fraction and wall motion score between group I and II (EF; 56±12% vs 52±11%, p=ns. WMS; 21±3 vs 23±4, p=ns) and it was improved at the tenth month by similar magnitude (group I/group II, EF % change = 12±12% vs 7±6%, p=ns, WMS % change=6±6% vs 7±5%, p=ns). The finding of no relation between TWN and functional recovery was observed also when the patients were analysed according to infarct location and presence or absence of Q-waves. Conclusion: As the exercise-induced TWN in patients with acute myocardial infarction was not related with better functional recovery of dysfunctional regional wall motion and ejection fraction, TWN does not appear to be an indicator of myocardial viability.
Kyung-A Byun,Seyeon Oh,Sosorburam Batsukh,Kyoung-Min Rheu,이배진,Kuk Hui Son,Kyunghee Byun 한국수산과학회 2023 Fisheries and Aquatic Sciences Vol.26 No.6
Sarcopenia is an age-related, progressive skeletal muscle disorder involving the loss of muscle mass and strength. Previous studies have shown that γ-aminobutyric acid (GABA) from fermented oysters aids in regulatory T cells (Tregs) cell expansion and function by enhancing autophagy, and concomitantly mediate muscle regeneration by modulating muscle inflammation and satellite cell function. The fermentation process of oysters not only increases the GABA content but also enhances the content of branched amino acids and free amino acids that aid the level of protein absorption and muscle strength, mass, and repair. In this study, the effect of GABA-enriched fermented sarco oyster extract (FSO) on reduced muscle mass and functions via Treg modulation and enhanced autophagy in aged mice was investigated. Results showed that FSO enhanced the expression of autophagy markers (autophagy-related gene 5 [ATG5] and GABA receptor-associated protein [GABARAP]), forkhead box protein 3 (FoxP3) expression, and levels of anti-inflammatory cytokines (interleukin [IL]-10 and transforming growth factor [TGF]-β) secreted by Tregs while reducing pro-inflammatory cytokine levels (IL-17A and interferon [IFN]-γ). Furthermore, FSO increased the expression of IL-33 and its receptor IL-1 receptor-like 1 (ST2); well-known signaling pathways that increase amphiregulin (Areg) secretion and expression of myogenesis markers (myogenic factor 5, myoblast determination protein 1, and myogenin). Muscle mass and function were also enhanced via FSO. Overall, the current study suggests that FSO increased autophagy, which enhanced Treg accumulation and function, decreased muscle inflammation, and increased satellite cell function for muscle regeneration and therefore could decrease the loss of muscle mass and function with aging.
Oh, Sunyoung,Kim, You Kyung,Jung, Chan Ho,Doh, Won Hui,Park, Jeong Young The Royal Society of Chemistry 2018 Chemical communications Vol.54 No.59
<P>To elucidate the factors affecting the catalytic properties of supported Au catalysts on the metal oxide support we investigated Au NPs deposited on crystallized mesoporous transition-metal oxides (<I>m</I>-oxides: Co3O4, NiO, and α-Fe2O3) prepared using the nanocasting method. The metal-oxide interaction in Au/mesoporous oxides resulted in higher catalytic activity for converting methanol to CO2 as a full oxidation product than pure <I>m</I>-oxides. Au/<I>m</I>-Fe2O3 exhibited high activity and low selectivity for methyl formate as a partial oxidative coupling product. We correlate the change in activity and selectivity with the interface between the Au and <I>m</I>-oxides.</P>
Oh, Eui Geum,Chu, Sang Hui,Bang, So Youn,Lee, Mi Kyung,Kim, Soo Hyun,Hyun, Sa Saeng,Jeon, Justin Y,Jeon, Yong Kwan,Im, Jee Aee,Lee, Jung Eun Sage Publications, Inc 2011 Biological research for nursing Vol.13 No.2
<P>Although therapeutic lifestyle modification (TLM) effectively improves the values of diagnostic biomarkers of metabolic syndrome, less is known about its effects on inflammatory chemokines and insulin resistance (IR) in patients with this syndrome. Objectives. To examine the effects of a short-term TLM program on inflammatory chemokines (monocyte chemoattractant protein-1 [MCP-1], retinol binding protein-4 [RBP-4]) and IR in subjects with metabolic syndrome.</P>