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2P-479 Field effect transistor를 이용한 열전현상에 의한 ZnO nanoparticles의 계면에서의 carrier이동에 대한 연구
윤태준,박병남 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
열전 현상은 온도구배에 의한 carrier의 확산이라는 단순한 현상이지만, 이 현상을 통해 carrier의 이동 특성에 대한 다양한 특성을 관찰할 수 있다. Carrier의 이동 특성을 관찰하기 위해서는 carrier의 이동을 조절할 수 있는 Field Effect Transistor (FET)를 이용할 수 있다. 이 실험에서는 Ultra Violet (UV)을 조사하여 carrier concentration을 변화하는 ZnO nanoparticles의 성질을 이용하여 계면에서의 carrier이동 특성을 FET를 이용하여 관찰하였다.
윤태준,안성수,송정식,박용범,이상원 연세대학교의과대학 2020 Yonsei medical journal Vol.61 No.8
Lectin-like oxidized low-density lipoprotein (LDL) receptor 1 (LOX1) binds to oxidized LDL, which is associated with inflammationin various vascular disorders. Here, we aimed to investigate the potential of soluble LOX1 (sLOX1) as an indicator of antineutrophilcytoplasmic antibody-associated vasculitis (AAV) activity. Serum levels of sLOX1 in frozen samples from patients withAAV enrolled in a prospective observational cohort study at the Severance Hospital were measured using enzyme-linked immunosorbentassay. Clinical and laboratory data were collected on the date when the blood sampling was performed. The associationbetween sLOX1 and clinical and laboratory data was assessed using Pearson’s correlation analysis. The median age of the recruited79 patients was 62.0 years, and 27 (34.2%) patients were men. The median Birmingham vasculitis activity score (BVAS),five-factor score, vasculitis damage index, and sLOX1 level were 6, 1, 3, and 911.9 pg/mL, respectively. Correlation analysis basedon BVAS revealed that sLOX1 and total cholesterol were significantly inversely correlated with BVAS (r=-0.224, p=0.047 and r=-0.424, p<0.001, respectively). No significant correlations were observed between continuous variables and sLOX1 except forBVAS, although total cholesterol tended to correlate with sLOX1 (r=0.190, p=0.093). Additionally, sLOX1 was not influenced by sex,hypertension, diabetes mellitus, or the presence of pulmonary, cardiovascular, and renal involvement of AAV. In summary, sLOX1was inversely correlated with BVAS in AAV patients, which is different from other vascular diseases or inflammatory diseases.
윤태준,안성수,표정윤,송정식,박용범,이상원 연세대학교의과대학 2021 Yonsei medical journal Vol.62 No.11
Purpose: We investigated whether serum clusterin levels could reflect the current antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV)-specific indices. Materials and Methods: Fifty-seven patients with AAV and 40 healthy controls were included in this study. AAV-specific indices included the Short-Form 36-Item Health Survey Physical and Mental Component Summaries (SF-36 PCS and MCS) scores, Birmingham vasculitis activity score (BVAS), five-factor score (FFS), and vasculitis damage index. Clinical and laboratory data and AAV-specific indices were obtained at blood collection. The highest tertile of BVAS (≥16) was defined as high activity of AAV. Results: The median age of AAV patients was 64.0 years and 19 patients were male. SF-36 PCS score (r=0.328), SF-36 MCS score (r=0.289), BVAS (r=-0.404), erythrocyte sedimentation rate (r=-0.336), and C-reactive protein levels (r=-0.421) were significantly correlated with serum clusterin levels. In the multivariable linear regression analysis using AAV-specific indices and serum clusterin levels, both FFS (β=0.412) and serum clusterin levels (β=-0.250) were significantly associated with BVAS. When the optimal serum clusterin cut-off level for high activity of AAV was identified as 130.45 μg/mL, patients with serum clusterin level ≤130.45μg/mL had a significantly higher risk for high activity of AAV than did those without (relative risk 7.194). Patients with AAV exhibited significantly lower serum clusterin levels than did healthy controls (168.2 μg/mL vs. 230.5 μg/mL). Conclusion: Serum clusterin levels could reflect the current disease activity in patients with AAV.
광학적 사진촬영과 3D소프트웨어를 통한 이미지 제작방식연구 - 사진 연작 <상승> 작업을 중심으로 -
윤태준 한국사진학회 2024 AURA Vol.- No.52
The photographic medium primarily uses optical lenses to mechanically reproduce images onto a plane, aiming to accurately represent real objects. Recent advancements in optical and digital technology have enhanced resolution and image processing, transcending traditional photographic methods and enabling new visual representations like Machine Vision. Digital images go beyond film, necessitating software like Adobe Photoshop for post-processing. This study suggests a new approach to photographic work, distinguishing between traditional photography and digital image production. It particularly focuses on combining photorealistic image creation in 3D software. The project <Ascent> illustrates this method, merging optical imaging techniques with 3D software. It utilizes repetitive printing and enlarging photography to generate new image data, finalized through texturing and rendering in 3D software. The goal is to explore new photographic techniques, not just as replicas of reality but as images that can be assembled and blended. This is demonstrated in <Ascent>, exploring the potential of innovative photographic methods. The research aims to push the boundaries of traditional photography by integrating it with contemporary digital technology, opening up new possibilities for the photographic medium.