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Global Context를 고려한 패치 단위의 이미지 변환 기법
김민석(Minseok Kim),김진성(Jinsung Kim),정영석(Yeong-Seok Jeong),이준형(Jun-Hyung Lee),정순영(Soonyoung Jung) 한국컴퓨터교육학회 2021 한국컴퓨터교육학회 학술발표대회논문집 Vol.25 No.2(A)
최근 이미지의 스타일을 변환하거나 노이즈를 제거하는 이미지 변환을 위해 딥러닝 기반의 방법론이 제안되고 있다. 이미지 변환 분야에서는 이미지의 해상도를 유지하며, 목적에 맞게 이를 변환해야 한다. 하지만 고해상도의 이미지가 입력되는 경우 변환을 위해 비교적 작은 조각으로 구분해 입력후 처리하는 경우가 많다. 해당 경우에 이미지의 Global Context를 고려할 수 없어 성능의 저하가 우려되는 경우가 많다. 따라서 본 논문에서는 이러한 문제를 보완하기 위해 FiLM을 통해 이미지의 Global Context 정보를 모델에 전달했다. 실험 결과 모델의 학습 과정에서 안정적인 학습을 확인할 수 있었으며, 성능역시 향상되었음을 확인할 수 있었다.
Byung Chul Kim,Ki Bae Kim,Eui Joong Kim,Soonyoung Park,Dong-Hwa Lee,Eun Bee Kim,Hee Bok Chae,박선미 대한소화기내시경학회 2014 Clinical Endoscopy Vol.47 No.2
Most infants with repaired gastroschisis develop normally and remain in good health. About 10% of patients with gastroschisis haveother malformations. We report a case of choledocholithiasis and intestinal malrotation in an adolescent with repaired gastroschisis. A17-year-old girl presented with fever, jaundice, and abdominal pain. She had undergone an operation to repair gastroschisis at birth. Physical examination revealed icteric sclera, a tight abdominal wall, and a longitudinal surgical scar at the midline. An abdominal computedtomography scan revealed a round calcifying lesion near the pancreas and a midline-positioned liver and gallbladder. Absence ofthe retroperitoneal duodenum and the anterior and left-sided position of the superior mesenteric vein compared with the superior mesentericartery were observed. Results of abarium examination revealed intestinal malrotation. Endoscopic retrograde cholangiopancreatographyrevealed diffuse dilatation of the biliary trees and a malpositioned gallbladder. A single stone was removed by using a basket. The clinical symptoms improved after the patient underwent endoscopic retrograde cholangiopancreatography.
Kim, Ho-Rim,Yu, Soonyoung,Oh, Junseop,Kim, Kyoung-Ho,Oh, Yun-Yeong,Kim, Hyun Koo,Park, Sunhwa,Yun, Seong-Taek Elsevier 2019 Agriculture, ecosystems & environment Vol.286 No.-
<P><B>Abstract</B></P> <P>The excessive application of nitrogen in agro-livestock farming areas has led to serious groundwater contamination around the world; thus, the efficient control of N loads is crucial to manage nitrate contamination of groundwater. In this study, to suggest an optimal N application limit as a key guideline of N management, we examine the impact of anthropogenic N loading on nitrate levels of shallow groundwater, using a large dataset (<I>n =</I> 4,000) collected in 2012–2014 from 100 agro-livestock farming districts in South Korea. Not considering the time lag and legacy problem, quantile regression is performed to overall assess the relationship between nitrate contamination and anthropogenic N input across the full range of conditional distribution of groundwater nitrate concentrations because of heteroscedasticity. As a result, positive gradients (<I>β<SUB>τ</SUB> </I>) meaning the rates of changes are found between groundwater nitrate concentrations and land-derived N loads at all quantiles; <I>β<SUB>τ</SUB> </I> increases as the quantile is higher and is as large as 36.48 ± 10.73 mg NO<SUB>3</SUB> <SUP>−</SUP>/L per land-derived N input (on a log scale) at the 90% quantile. The quantile map indicates that the high gradient (i.e., the large sensitivity to N loading) is related to agricultural land use, low elevation, and low topographic slopes. In fact, groundwater nitrate concentrations increase as the percentage of agricultural land increases but the percentage of forest, elevation and slope angle decreases, which suggests that land use, elevation, and slope should be considered when attempting to evaluate N application limits. This study suggests the N limits below 170 kg ha<SUP>-1</SUP> year<SUP>-1</SUP> based on the drinking water standard (44.3 mg/L as NO<SUB>3</SUB> <SUP>−</SUP>) at the quantiles higher than 70% which mostly occur in flat agricultural lowland areas. Our method used in this study can be applied elsewhere to establish efficient management practices for groundwater nitrate contamination, considering local environmental factors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An empirical relationship between N inputs and groundwater nitrate levels over S. Korea. </LI> <LI> Results of quantile regression is useful to suggest optimal N application limits. </LI> <LI> Nitrate contamination is more sensitive at higher quantiles toward low-lying lands. </LI> <LI> N application limit below 170 ha<SUP>−1</SUP> year<SUP>-1</SUP> is suggested for typical agricultural areas. </LI> </UL> </P>
Kim, Jinheung,Kim, Jong Kuk,Heo, Soonyoung,Lee, Ho Sueb Elsevier 2006 THIN SOLID FILMS - Vol.503 No.1
<P><B>Abstract</B></P> <P>La- or Nd-substituted bismuth titanate (BLT or BNT) and Nb-cosubstituted bismuth titanate (Nb-BLT or Nb-BNT) thin films were prepared in the presence of nonionic surfactants, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (EO<SUB> <I>x</I> </SUB>PO<SUB> <I>y</I> </SUB>EO<SUB> <I>x</I> </SUB>) triblock copolymers, added as additives to the sol solution. For Nb-BLT films prepared with EO<SUB>106</SUB>PO<SUB>70</SUB>EO<SUB>106</SUB>, the (200) orientation relative to (117) was dominant as compared with Nb-BLT films produced without surfactant or with EO<SUB>20</SUB>PO<SUB>70</SUB>EO<SUB>20</SUB>, and the remanent polarization (<I>P</I> <SUB>r</SUB>) of the Nb-BLT film was 22 μC/cm<SUP>2</SUP>, which was superior to 10 and 15 μC/cm<SUP>2</SUP> of Nb-BLT films prepared without surfactant or with EO<SUB>20</SUB>PO<SUB>70</SUB>EO<SUB>20</SUB>. The additional Nb cosubstitution in BLT and BNT affected particle orientation in the films and resulted in higher ferroelectricity than those of the BLT and BNT films. The Nb-BNT/EO<SUB>106</SUB>PO<SUB>70</SUB>EO<SUB>106</SUB> film showed the best ferroelectric properties; its remanent polarization was 30 μC/cm<SUP>2</SUP> and the polarization (<I>P</I>*–<I>P</I>˄) shows no significant change up to 8×10<SUP>8</SUP> switching cycles.</P>