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[연료 및 윤활유부문] 연료계통 설계요소가 소형 경유 자동차 저온성능에 미치는 영향
신동현(Dong-Hyun Sheen),양대준(Dae-joon Yang),김성환(Sunghwan Kim),김현석(Hyeon-seok Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Low temperature operability of the diesel vehicle can not be guaranteed by controlling the low temperature flow characteristics of fuel alone. Proper design of fuel system that matches the fuel properties has to be made to achieve the common purpose. To find the cause of the cold cranking problem recent1y observed mainly with a particular mxIe1light duty diesel vehicles in Korean market, tests have been carried out to determine how the fuel filter design affects the low temperature performance of vehicles in the same category. Representative fuel filter.; have been collected to investigate their char3cteristics in terms of the effective pore size and the filtration area. These characteristics have been assessed against the low temperature test results from both fuel test rig and cold chamber chassis dynamometer operations. The results show that both the effective pore size and the filtration area are critical in determining the low temperature performance of vehicles tested. It has been found that for trouble-free operation of the vehicles at low temperatures down to -20t, it is desirable that the effective pore size is larger than 35 micrometers and the filtration area larger than 3,5OO㎠.
Kim, Na Yeon,Kim, Joon Hwan,Park, Jin Suk,Kim, Soo Hyun,Cho, Yeon Kyung,Cha, Dong Hyun,Kim, Ki Eun,Kang, Myung Suh,Lim, Kyung Ah,Sheen, Youn Ho The Korean Pediatric Society 2016 Clinical and Experimental Pediatrics (CEP) Vol.59 No.no.sup1
Herein, we report a rare case of hemolytic anemia with reticulocytopenia following intravenous immunoglobulin therapy in a young infant treated for Kawasaki disease. A 2-month-old boy presented with fever lasting 3 days, conjunctival injection, strawberry tongue, erythematous edema of the hands, and macular rash, symptoms and signs suggestive of incomplete Kawasaki disease. His fever resolved 8 days after treatment with aspirin and high dose infusion of intravenous immunoglobulin. The hemoglobin and hematocrit decreased from 9.7 g/dL and 27.1% to 7.4 g/dL and 21.3%, respectively. The patient had normocytic hypochromic anemia with anisocytosis, poikilocytosis, immature neutrophils, and nucleated red blood cells. The direct antiglobulin test result was positive, and the reticulocyte count was 1.39%. The patient had an uneventful recovery. However, reticulocytopenia persisted 1 month after discharge.
Na Yeon Kim,Joon Hwan Kim,Jin Suk Park,Soo Hyun Kim,Yeon Kyung Cho,차동현,Ki Eun Kim,Myung Suh Kang,Kyung Ah Lim,Youn Ho Sheen 대한소아청소년과학회 2016 Clinical and Experimental Pediatrics (CEP) Vol.59 No.no.sup1
Herein, we report a rare case of hemolytic anemia with reticulocytopenia following intravenous immunoglobulin therapy in a young infant treated for Kawasaki disease. A 2-month-old boy presented with fever lasting 3 days, conjunctival injection, strawberry tongue, erythematous edema of the hands, and macular rash, symptoms and signs suggestive of incomplete Kawasaki disease. His fever resolved 8 days after treatment with aspirin and high dose infusion of intravenous immunoglobulin. The hemoglobin and hematocrit decreased from 9.7 g/dL and 27.1% to 7.4 g/dL and 21.3%, respectively. The patient had normocytic hypochromic anemia with anisocytosis, poikilocytosis, immature neutrophils, and nucleated red blood cells. The direct antiglobulin test result was positive, and the reticulocyte count was 1.39%. The patient had an uneventful recovery. However, reticulocytopenia persisted 1 month after discharge.
Role of the rice hexokinases OsHXK5 and OsHXK6 as glucose sensors.
Cho, Jung-Il,Ryoo, Nayeon,Eom, Joon-Seob,Lee, Dae-Woo,Kim, Hyun-Bi,Jeong, Seok-Won,Lee, Youn-Hyung,Kwon, Yong-Kook,Cho, Man-Ho,Bhoo, Seong Hee,Hahn, Tae-Ryong,Park, Youn-Il,Hwang, Ildoo,Sheen, Jen,Jeo American Society of Plant Physiologists 2009 Plant Physiology Vol.149 No.2
<P>The Arabidopsis (Arabidopsis thaliana) hexokinase 1 (AtHXK1) is recognized as an important glucose (Glc) sensor. However, the function of hexokinases as Glc sensors has not been clearly demonstrated in other plant species, including rice (Oryza sativa). To investigate the functions of rice hexokinase isoforms, we characterized OsHXK5 and OsHXK6, which are evolutionarily related to AtHXK1. Transient expression analyses using GFP fusion constructs revealed that OsHXK5 and OsHXK6 are associated with mitochondria. Interestingly, the OsHXK5DeltamTP-GFP and OsHXK6DeltamTP-GFP fusion proteins, which lack N-terminal mitochondrial targeting peptides, were present mainly in the nucleus with a small amount of the proteins seen in the cytosol. In addition, the OsHXK5NLS-GFP and OsHXK6NLS-GFP fusion proteins harboring nuclear localization signals were targeted predominantly in the nucleus, suggesting that these OsHXKs retain a dual-targeting ability to mitochondria and nuclei. In transient expression assays using promoterluciferase fusion constructs, these two OsHXKs and their catalytically inactive alleles dramatically enhanced the Glc-dependent repression of the maize (Zea mays) Rubisco small subunit (RbcS) and rice alpha-amylase genes in mesophyll protoplasts of maize and rice. Notably, the expression of OsHXK5, OsHXK6, or their mutant alleles complemented the Arabidopsis glucose insensitive2-1 mutant, thereby resulting in wild-type characteristics in seedling development, Glc-dependent gene expression, and plant growth. Furthermore, transgenic rice plants overexpressing OsHXK5 or OsHXK6 exhibited hypersensitive plant growth retardation and enhanced repression of the photosynthetic gene RbcS in response to Glc treatment. These results provide evidence that rice OsHXK5 and OsHXK6 can function as Glc sensors.</P>
조윤호(Younho Cho),신봉재(Bongjae Sheen),J. D. Achenbach,이준현(Joon-Hyun Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
There has been a great concern about the on-line structural health monitoring in plate-like structures using guided wave tomography method. Most studies on guided wave tomography have only dealt with defect position. They cannot give information of defect size. In this paper, we studied tomography algorithm to detect a defect size using reflection of guided wave. The work presented here introduces a Reconstruction Algorithm for the Probabilistic Inspection of Damage (RAPID) which is used to construct tomographic images of defect position and size. Through this study, a feasibility of quantitative defect imaging based on the guided waves tomography is explored.
( Joo Hun Park ),( Tae Rim Shin ),( Seung Soo Sheen ),( Joon Beom Seo ),( Kwang Ha Yoo ),( Ji Hyun Lee ),( Tae Hyung Kim ),( Seong Yong Lim ),( Ho Il Yoon ),( Jae Seung Lee ),( Yeon Mok Oh ),( Sang Do 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-
Background: The progression of emphysema and airflow limitation in chronic obstructive pulmonary disease (COPD) leads to static hyperinflation. However, few studies have been conducted so far regarding the prognostic value of static hyperinflation marked by residual volume (RV)/ total lung capacity (TLC). Therefore we attempted to find the independent factors related to static hyperinflation and to test the hypothesis that static hyperinflation is associated with the prognosis of COPD. Methods: We analyzed 380 COPD patients of our Korean Obstructive Lung Disease (KOLD) cohort who were recruited from 16 hospitals in Korea from June 2005 to April 2012. Hyperinflated COPD was defined as 40% or more of RV/ TLC. Results: Patients with hyperinflated COPD was older and male dominant, and had worse pulmonary function (represented by lower FEV1, FEV1/FVC, and FVC), higher emphysema index, and severer air-trapping, compared to non-hyperinflated COPD group (p<0.05). Multiple logistic regression analysis demonstrated that age (OR = 1.071), FEV1 (OR = 0.923), FEV1/FVC (OR = 0.948), and emphysema index (OR = 1.036) were independently associated with severe static hyperinflation ( RV/TLC =40%) (p<0.05). According to the severity of static hyperinflation, mean survival period was shorter (RV/TLC = 60% : 77.7 ± 4.6 months, 40 = RV/TLC <60 : 94.3 ± 1.9 months, RV/TLC < 40 % : 95.1 ± 1.8 months, p<0.05) and acute exacerbation was more frequent (p<0.05). Conclusions: Old age, emphysema index, FEV1, and FEV1/FVC were independent factors associated with hyperinflated COPD. The survival period was shorter according to the severity of static hyperinflation. This study was supported by a grant from the Korea Healthcare Technology R&D Project, Ministry for health and welfare (A102065).
( Joo Hun Park ),( Tae Rim Shin ),( Seung Soo Sheen ),( Joon Beom Seo ),( Kwang Ha Yoo ),( Ji Hyun Lee ),( Tae Hyung Kim ),( Seong Yong Lim ),( Ho Il Yoon ),( Jae Seung Lee ),( Yeon Mok Oh ),( Sang Do 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: The progression of emphysema and airfi ow limitation in chronic obstructive pulmonary disease (COPD) leads to static hyperinfi ation. However, few studies have been conducted so far regarding the prognostic value of static hyperinfi ation marked by residual volume (RV)/ total lung capacity (TLC). Therefore we attempted to fi nd the independent factors related to static hyperinfi ation and to test the hypothesis that static hyperinfi ation is associated with the prognosis of COPD. Methods: We analyzed 380 COPD patients of our Korean Obstructive Lung Disease (KOLD) cohort who were recruited from 16 hospitals in Korea from June 2005 to April 2012. Hyperinfi ated COPD was defi ned as 40% or more of RV/ TLC. Results: Patients with hyperinfi ated COPD was older and male dominant, and had worse pulmonary function (represented by lower FEV1, FEV1/FVC, and FVC), higheremphysema index, and severer air-trapping, compared to non-hyperinfiated COPD group (p<0.05). Multiple logistic regression analysis demonstrated that age (OR = 1.071), FEV1 (OR = 0.923), FEV1/FVC (OR = 0.948), and emphysema index (OR = 1.036) were independently associated with severe static hyperinfiation ( RV/TLC =40%) (p<0.05). According to the severity of static hyperinfi ation, mean survival period was shorter (RV/TLC = 60% : 77.7 ± 4.6 months, 40 = RV/TLC <60 : 94.3 ± 1.9 months, RV/TLC < 40 % : 95.1 ± 1.8 months, p<0.05) and acute exacerbation was more frequent (p<0.05). Conclusions: Old age, emphysema index, FEV1, and FEV1/FVC were independent factors associated with hyperinfi ated COPD. The survival period was shorter according to the severity of static hyperinfi ation. This study was supported by a grant from the Korea Healthcare Technology R&D Project, Ministry for health and welfare (A102065).