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SSP 기후변화 시나리오에 따른 농업용 저수지 홍수조절능력 분석
김지혜 ( Kim¸ Jihye ),곽지혜 ( Kwak¸ Jihye ),황순호 ( Hwang¸ Soonho ),전상민 ( Jun¸ Sang Min ),이성학 ( Lee¸ Sunghack ),이재남 ( Lee¸ Jae Nam ),강문성 ( Kang¸ Moon Seong ) 한국농공학회 2021 한국농공학회논문집 Vol.63 No.5
The objective of this study was to evaluate the flood control capacity of the agricultural reservoir based on state-of-the-art climate change scenario - SSP (Shared Socioeconomic Pathways). 18 agricultural reservoirs were selected as the study sites, and future rainfall data based on SSP scenario provided by CMIP6 (Coupled Model Intercomparison Project 6) was applied to analyze the impact of climate change. The frequency analysis module, the rainfallrunoff module, the reservoir operation module, and their linkage system were built and applied to simulate probable rainfall, maximum inflow, maximum outflow, and maximum water level of the reservoirs. And the maximum values were compared with the design values, such as design flood of reservoirs, design flood of direct downstream, and top of dam elevation, respectively. According to whether or not the maximum values exceed each design value, cases were divided into eight categories; I-O-H, I-O, I-H, I, O-H, O, H, X. Probable rainfall (200-yr frequency, 12-h duration) for observed data (1973∼2020) was a maximum of 445.2 mm and increased to 619.1∼1,359.7 mm in the future (2011∼2100). For the present, 61.1% of the reservoirs corresponded to I-O, which means the reservoirs have sufficient capacity to discharge large inflow; however, there is a risk of overflowing downstream due to excessive outflow. For the future, six reservoirs (Idong, Baekgok, Yedang, Tapjung, Naju, Jangsung) were changed from I-O to I-O-H, which means inflow increases beyond the discharge capacity due to climate change, and there is a risk of collapse due to dam overflow.
( Jihye Kang ),( Da-gyum Lee ),( Yoohyun Hwang ),( Jiyeon Kim ),( Jihee Jung ),( Donghwan Jang ),( Sungweon Ryoo ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Purpose Anti-tuberculosis drug susceptibility testing (DST) is increasing in importance and demand for treatment. Supply of standardized high-quality DST medium and tuberculosis (TB) specimen titration are key technologies in the DST process. The purpose of this study was to evaluate test method that secures accuracy by taking advantage of the proportion tests. Methods To perform the anti-TB DST, an improved 6-well medium (Middlebrook 7H10 medium) produced in a GMP-qualified place was used. After inoculation in 6-well medium, it was compared with the result of REMA. The concentration of the drug added for the drug susceptibility test was based on the value recommended by WHO. Results The improved 6-well anti-TB DST medium produced in a GMP certified facility is expected to be able to replace the in-house medium used for phenotypic DST. Conclusions It is thought that the medium used for phenotype DST should be produced in a GMP certified facility in order to standardize and high quality. The improved 6-well medium is a meaningful attempt to improve the quality of DST. For the clinical introduction of an improved medium, additional experiments and verification work are required for TB strains with various drug resistance patterns.
Kang, Byoung-Ho,Seo, Jun-Seon,Jeong, Sohee,Lee, Jihye,Han, Chang-Soo,Kim, Do-Eok,Kim, Kyu-Jin,Yeom, Se-Hyuk,Kwon, Dae-Hyuk,Kim, Hak-Rin,Kang, Shin-Won The Optical Society 2010 Optics express Vol.18 No.17
<P>We propose a highly efficient hybrid light-emitting device (LED) with a single active layer where CdSe/ZnS quantum dots (QDs) are dispersed as a guest material in a conjugated polymer (co-polymer) matrix used for a host material. In our structure, the QDs act on light-emitting chromophores by trapping the migrating excitons in the co-polymer matrix via F?rster energy transfer, and improve the charge balance within the co-polymer by trapping the injected electron carriers. Experimental results show that the electroluminescent properties highly depend on the doping density of the QDs within the co-polymer matrix, where the luminance as well as the external current efficiency are initially enhanced with increasing the concentration of the dispersed QDs in the co-polymer solution, and then such properties are degraded due to aggregation of the QDs. We can get the maximum brightness of 9,088 cd/m(2) and the maximum external current efficiency of 7.5 cd/A in mixing ratio of the QDs by 1.0 wt%. The external current efficiency is enhanced by over 15 times and the turn-on voltage is reduced in comparison with the corresponding values for a reference device that uses only a co-polymer as an active layer.</P>
Defects controlled stress engineering in Al-doped ZnO transparent multilayered thin films
Kang Jihye,Yun Jaeyong,Oh Yoo-Young,Kim Sung-Jin,Kamiko Masao,Kim Nam-Hoon,Koh Jung-Hyuk 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.5
This study explores stress engineering in multilayered structures of Al-doped ZnO thin films by controlling defects in them. Al-doped ZnO thin films are examples of transparent conducting oxides. Owing to their high conductivity and transparency, Al-doped ZnO thin films have various promising applications. However, defects and dislocations in thin films can deteriorate their electrical and optical properties. These defects or dislocations can be formed during the thin-film deposition process. Especially, defects can be formed between the layers during the stacking process of the sol–gel method. Therefore, methods to control defects have been designed and simulated to engineer stress in thin films. In this study, layered Al-doped ZnO thin films with different thicknesses were prepared to investigate the interface effects and electron motion in them.