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Joo, Jinwhan,Jin, Haneul,Oh, Aram,Kim, Byeongyoon,Lee, Jaeyoung,Baik, Hionsuck,Joo, Sang Hoon,Lee, Kwangyeol The Royal Society of Chemistry 2018 Journal of Materials Chemistry A Vol.6 No.33
<P>Development of highly active and durable bifunctional electrocatalysts for overall water splitting is vital for the economical production of H2 as an alternative energy source. Herein, we report the synthesis of Cu2−xS@IrSy@IrRu nanoparticles (CIS@IrRu NPs), which show excellent catalytic performances for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an acidic electrolyte. Benefiting from the optimal composition of IrRu and the stable IrSy shell, the cactus-like IrRu NPs show high electrocatalytic activity and stability. The cactus-like IrRu NPs exhibit optimal HER and OER performances and high stability at a ratio of Ir/Ru 1.00 : 1.07. In overall water splitting, the CIS@Ir48Ru52 NPs achieve a current density of 10 mA cm<SUP>−2</SUP> at a cell voltage of only 1.47 V in 0.1 M HClO4 electrolyte and show negligible degradation after 100 h of continuous operation in the stability test.</P>
매우 좁은 각을 가지는 LED 조명렌즈의 설계 및 제작
주재영(JaeYoung Joo),홍진표(JinPyo Hong),김기훈(Gi-Hoon Kim),박정욱(Joung Wook Park),송상빈(Sang-Bin Song),김용복(YoungBok Kim),김경훈(KyungHoon Kim) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
고출력 조명용 LED의 배광각을 좁히기 위하여 비구면 렌즈 설계기법을 적용하여 매우 좁은 각을 가지는 LED 2차렌즈를 설계 및 제작하였다. 렌즈는 PMMA로 5축 다이아몬드 터닝 가공기로 직가공되었으며 가공된 렌즈의 특성을 평가분석하였다. 제작된 렌즈는 우수한 광하적 성능을 발현하였다.
주재영(Jaeyoung Joo),김민수(Minsoo Kim),양회성(Hoesung Yang) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
도시철도 경전철은 수송수요에 따라 열차편성수를 산정하고 차량기지 용량을 산정하게 된다. 경전철의 특징으로 수요가 적은 노선에서는 보편적으로 2량 1편성 무인운전으로 차량이 설계되고 있는 추세이다. 본 논문에서는 소량 다편성 차량기지 설계는 도심 속 빌딩화를 통해 효율적인 열차운영 및 차량기지 설계가 가능할 것으로 가상하고 그 가능성을 검토해 보았다. Light rail transit which means urban railway determines the number of trainsets required by transport demand and capacity of depot. When it comes to less transport demanding line, light rail transit generally consists of 1 unmanned trainset which is equivalent to 2 cars. This study aims to analyze depot design of having fewer cars and more trainsets, review the possibility of efficient train operation and depot design through building plan in urban area.
Usefulness of the Cytomegalovirus Antigenemia Assay in Patients With Ulcerative Colitis
( Jaeyoung Chun ),( Changhyun Lee ),( Ji Eun Kwon ),( Sung Wook Hwang ),( Sang Gyun Kim ),( Joo Sung Kim ),( Hyun Chae Jung ),( Jong Pil Im ) 대한장연구학회 2015 Intestinal Research Vol.13 No.1
Background/Aims: Patients with ulcerative colitis (UC) are at high risk for cytomegalovirus (CMV) reactivation. The useful-ness of the CMV antigenemia assay in active UC patients has rarely been studied. We assessed whether the assay detects CMV colitis and predicts clinical outcomes in patients with UC. Methods: We retrospectively reviewed the medical records of pa-tients hospitalized for moderate-to-severe UC from 2003 to 2012. Positive CMV antigenemia was defined as ≥1 pp65-positive cell per 2×105 polymorphonuclear neutrophils. CMV colitis was defined as the presence of inclusion bodies and/or positive im-munohistochemistry in the colonic mucosa. The primary outcome was steroid refractoriness, defined as the absence of clinical improvement after intravenous high-dose steroid administration. Results: A total of 43 patients were enrolled. CMV antigen-emia was detected in 12 (27.9%) patients. Positive CMV antigenemia was significantly associated with CMV colitis (P=0.001). The sensitivity and specificity of positive CMV antigenemia for diagnosing CMV colitis were 66.7% and 87.1%, respectively. Steroid refractoriness was found in 11 of 12 (91.7%) and 12 of 31 (38.7%) patients with positive and negative CMV antigenemia, respectively (P=0.002). The independent predictors for steroid refractoriness were positive CMV antigenemia (adjusted odds ratio [OR], 7.73; 95% confidence interval [CI], 1.22-49.19; P=0.030) and a shorter duration from the diagnosis of UC (adjusted OR, 0.99; 95% CI, 0.98-0.99; P=0.025). Conclusions: The CMV antigenemia assay shows low sensitivity but high specificity for detecting CMV colitis and may predict steroid-refractory UC. Early rescue therapy might be considered in UC patients positive for CMV antigenemia. (Intest Res 2015;13:50-59)
( Jaeyoung Cho ),( Eun Sun Kim ),( Se Joong Kim ),( Yeon Joo Lee ),( Jong Sun Park ),( Young-jae Cho ),( Ho Il Yoon ),( Jae Ho Lee ),( Choon-taek Lee ) 대한결핵 및 호흡기학회 2016 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.121 No.-
Introduction: How long persistent and stable ground-glass nodules (GGNs) should be followed is uncertain, although a minimum of 3 years is suggested. We evaluated a group of GGNs that had remained stable for an initial period of 3 years with the aim of determining the proportion of GGNs showing subsequent growth after the initial 3 years and identifying the clinical and radiologic factors associated with subsequent growth. Methods: We retrospectively analyzed patients who underwent further computed tomography (CT) after the initial 3-year follow-up period showing a persistent and stable GGN (at least 5 years of follow-up from the initial CT). Results: Between May 2003 and June 2015, 453 GGNs (438 pure GGNs and 15 part-solid GGNs) were found in 218 patients. Of the 218 patients, 14 had 15 GGNs showing subsequent growth after the initial 3 years during the median follow-up period of 6.4 years. For the person-based analysis, the frequency of subsequent growth of GGNs that had been stable during the initial 3 years was 6.7% (14 of 218). For the nodule-based analysis, the frequency was 3.3% (15 of 453). In a multivariate analysis, age 65 years or older (OR = 5.51, p = 0.012), history of lung cancer (OR = 6.44, p = 0.006), initial size 8 mm or larger (OR = 5.74, p = 0.008), presence of a solid component (OR = 16.58, p = 0.009), and air bronchogram (OR = 5.83, p = 0.015) were independent risk factors for subsequent GGN growth. Conclusions: For the individuals with GGNs having the aforementioned risk factors, the longer follow-up period is required to confirm subsequent GGN growth. 상기 초록은 J Thorac Oncol. 2016 Sep;11(9):1453-9에 출판된 논문의 초록임.