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Won-Sik Oh,Daeyoun Cho,Kyu-Min Cho,Gun-Woo Moon,Byungchoon Yang,Taeseok Jang IEEE 2009 Journal of display technology Vol.5 No.1
<P>In this paper, a novel two-dimensional (2-D) adaptive dimming technique with X-Y channels for light-emitting diode (LED) backlight system in LCD TVs is proposed. The proposed LED backlight has matrix-structured LED modules with row and column switches to control the brightness of individual division block. It shows local dimming effects such as reduced power consumption and high dynamic contrast ratio even with much less number of LED drivers than that of the conventional 2-D local dimming method. Therefore, low cost and compact design of LED drivers can be achieved. This paper also contains a new adaptive dimming algorithm and image manipulation technique for the proposed LED backlight system. The proposed dimming technique is verified by simulation and experimental results based on a RGB-LED backlight of a 32-in LCD TV.</P>
Water Saving by Shallow Intermittent Irrigation and Growth of Rice
Gun Won, Jong,Soo Choi, Jang,Phil Lee, Seung,Ho Son, Seung,Ok Chung, Sang The Crop Science Society of Japan 2005 Plant production science Vol.8 No.4
<P>To reduce water requirement and improve water productivity (the grain yield per unit volume of water irrigated) by water-saving irrigation techniques, we examined the effects of very shallow intermittent irrigation (VSII, 2cm), shallow intermittent irrigation (SII, 4cm) and traditional deep water irrigation (DWI, 10cm) on rice growth and yield in the field for two years. The amount of water irrigation during the rice-growing period (average of two years) was 318, 391 and 469 mm in VSII, SII and DWI, respectively. Rice growth and grain yield were not significantly influenced by the treatments. As the irrigation water input decreased, the water productivity increased. The water productivity increased by 46 % in VSII and 20 % in SII on the average as compared with DWI. The shallower the irrigation depth, the lower the breaking weight and the higher the lodging resistance, and the deeper the roots in the paddy soil. In DWI, the percentage of head rice was lower and the protein content was higher, suggesting deterioration in the palatability of cooked rice due to the increase of chalky rice. The water-saving rate was 32.9 % in VSII and 17.2 % in SII as compared with typical deep water irrigation in Korea.</P>
( Won Ku Lee ),( Kyoungjune Pak ),( Seong Jang Kim ),( Junhee Han ),( Jeong Min Kim ),( Gun Wook Kim ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Moon Bum Kim ),( Byung Soo Kim ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: There is increasing awareness that psoriasis is a systemic, immune-mediated inflammatory disease including skin and joint. Objectives: To detect and quantify systemic and vascular inflammation in patients with moderate to severe psoriasis using [18F]-fluorodeoxyglucose positron emission tomography- computed tomography (18FDG PET/CT). Furthermore, to investigate the relationship between PASI score and FDG uptake in the liver, spleen and aorta. Methods: Case series with a nested case-control study was done. Twenty seven patients with moderate to severe psoriasis and twenty five controls age and sex matched underwent 18FDG PET/CT. FDG uptakes in the liver, spleen and 5 segments of aorta were evaluated by calculating the maximum standardized uptake value (SUVmax). Results: 18FDG PET/CT of patients with moderate to severe psoriasis demonstrated increased FDG uptakes in the liver and spleen compared with the controls. There were increased FDG uptakes in the liver, spleen and all segments of aorta with psoriasis group of high PASI score compared to the group with low PASI score. Conclusion: This study shows that systemic inflammation is increased in psoriasis patients compared to the controls, and there is correlation between psoriasis severity and systemic and vascular inflammation. We also suggest that 18FDG PET/CT can be used to identify systemic and vascular inflammation in psoriasis patients.
Morphological Difference of Rice Seedling Grown under Different Dissolved Oxygen Conditions
Won Jong Gun,Choi Jang Soo,Ahn Deck Jong,Lee Seung Phil,Lee Sang Chul,Yoshida Tomohiko The Korean Society of Crop Science 2004 Korean journal of crop science Vol.49 No.4
The response of dissolved oxygen (DO) concentrations caused significant change in root number, root length, coleoptile length, shoot length and leaf age of seedlings. The genotypic difference in the effect of DO also highly significant (P<0.01) for all of the seedling traits. The number and length of root were extremely inhibited at the condition of $0.39\pm0.09$ DO concentration. While the coleoptile elongated markedly in the lowest DO concentrations, the shoot did not develop. The root growth was improved slightly at the $1.39\pm0.27mg L^{-1}$, however, there were no difference among genotypes at these two low DO concentrations. As the DO concentration become higher, the growth of root and shoot was improved remarkably. Root number, root length and shoot length was significantly different between $20\;and\;30^{\circ}C$ in DO rich and normal conditions, the development of those traits were apparently accelerated in high water temperature, however those traits of seedlings in DO deficiency were not different between the two temperatures except for shoot length. On the other hand the coleoptile length was not affected by the stagnant water temperature; it was stimulated by the low DO concentration. The competition of DO was greater as the seedling density was increased in the stagnant water, therefore the seedlings grown under high density have long and white coleoptiles, and the growth of roots and shoots was retarded severely.
Jang, Won-Cheoul,Tae, Gun-Sik Korean Society for Biochemistry and Molecular Biol 1996 Journal of biochemistry and molecular biology Vol.29 No.1
The structural changes in the electron donor side of the PSII reaction center have been monitored since heat treatment ($45^{\circ}C$ for 5 min) of thylakoids is known to decrease the oxygen evolving activity. In heat-treated spinach chloroplast thylakoids, the inhibitory effect of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) on the electron transport activity of the PSII reaction center from diphenyl carbazide to dichlorophenolindophenol became reduced approximately 3.8 times and [$^{14}C$]-labeled DCMU binding on the D1 polypeptide decreased to 25~30% that of intact thylakoid membranes, implying that the conformational changes of the DCMU binding pocket, residing on the D1 polypeptide, occur by heat treatment. The accessibility of trypsin to the $NH_2$-terminus of the cytochrome b-559 ${\alpha}$-subunit, assayed with Western blot using an antibody generated against the synthetic peptide (Arg-68 to Arg-80) of the COOH-terminal domain, was also increased, indicating that heat-treatment caused changes in the structural environments near the stromal side of the cytochrome b-559 ${\alpha}$-subunit, allowing trypsin more easily to cleave the $NH_2$-terminal domain. Therefore, the structural changes in the electron donor side of the PSII reaction center complexes could be one of the reasons why the oxygen evolving activity of the heat-treated thylakoid membranes decreased.
Growth and Properties of CrNx/TiNy/Al Based on N2 Gas Flow Rate for Solar Thermal Applications
Gun-Eik Jang,Sang-Jun Ju,Yeo-Won Jang,Hyun-Hoo Kim,Cheon Lee 한국전기전자재료학회 2016 Transactions on Electrical and Electronic Material Vol.17 No.3
The CrN/TiN/Al thin films for solar selective absorber were prepared by dc reactive magnetron sputtering with multitargets. The binary nitride CrN layer deposited with change in N2 gas flow rates. The gas mixture of Ar and N2 was animportant parameter during sputtering deposition because the metal volume fraction (MVF) was controlled by theN2 gas flow rate. In this study, the crystallinity and surface properties of the CrN/TiN/Al thin films were estimated byX-ray diffraction (XRD), atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The composition and depth profile of thin films were investigated using Auger electron spectroscopy (AES). Theabsorptance and reflectance with wavelength spectrum were recorded by UV-Vis-NIR spectrophotometry at a rangeof 300~1,100 nm.
( Gun Woo Koo ),( Tai Sun Park ),( Dong Won Park ),( Ji-yong Moon ),( Sang-heon Kim ),( Tae-hyung Kim ),( Jang Won Sohn ),( Dong Ho Shin ),( Ho Joo Yoon ) 대한결핵 및 호흡기학회 2016 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.121 No.-
Purpose: Many drugs can cause interstitial lung diseases by various mechanisms. However, the epidemiology and causes of the drugs-induced interstitial lung diseases (DILD) have not been well described yet. This study aimed to assess the characteristics of the subjects with DILD and the causative drugs of DILD cases, which has been reported spontaneously in Korea. Methods: Cases of DILD were recruited from the spontaneously reported pharmacovigilance data which has been recorded in the Korea Institute of Drug Safety & Risk Management-Korea Adverse Event Reporting System database (KIDS-KAERS database) over recent 10 years (from Jul 2005 to Jun 2015). DILD was defined using WHO-Adverse Reaction Terminology indicative of interstitial lung diseases. Results: From 767,960 cases of spontaneously reported adverse drug event cases, 445 cases (0.06%) were identified as DILD. Of the subjects with DILD, males were more common than females (70.8% vs.29.2%). Regarding severity, 315 cases (70.8%) were classified as serious based on WHO criteria. The most common causative drugs were antineoplastic and immunomodulating agents (70.65%), followed by antiinfectives and cardiovascular drugs. Conclusions: The prevalence of DILD among the spontaneously reported adverse drug event cases in Korea was low. Males were more frequently affected and the majority of cases were induced by antineoplastic immunomodulating agents.
Jang, Kyung-Min,Kim, Sung-Gun,Park, Ji-Young,Choi, Won-Ho,Lee, Jae-Woo,Jegal, Hyeon-Young,Kweon, Soon-Jong,Choi, Kwang-Ho,Park, Jung-Ho 충남대학교 농업과학연구소 2016 Korean Journal of Agricultural Science Vol.41 No.2
Silk has had a reputation as a luxurious and sensuous fabric but it is not popular due to the expensive price and poor durability. To develop the silk materials that apply the various industries, the artificially synthesized gene can be introduced into the silkworm and expressed in the silk gland. Transgenic silkworms for the mass production of green fluorescent silks are generated using a fibroin H-chain expression system. For commercial use, safety assessment of the transgenic silkworms is essential. The purpose of this study was to examine the potential acute oral toxicity of EGFP protein expressed in genetically modified (GM) fluorescence silkworm and to obtain the approximative lethal dose in the male and female at 6-weeks ICR mice. EGFP protein was fed at a dose of 2,000 mg/kg body weight in five male or five female mice. Mortalities, clinical findings and body weight changes were monitored for 1, 3, 7, 14 days after dosing. At the end of 14 day observation period, all mice were sacrificed, and the postmortem necropsy were performed. The test group was not observed death case. Also the effect was not admitted by test substance administration in common symptoms, the body weight and postmortem. The results of single-dose oral toxicity test showed that approximative lethal dose of EGFP protein expressed in fluorescence silkworm was considered to exceed the 2,000 mg/kg body weight in both sexes.