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A potential link between miRNA expression and fruit development
June Hyun Park,Dong-Gyu Hwang,Jae Yun Lim,Donghyun Kim,Yourim Choi,Soyoung Kim,Gregory Reeves,Chanseok Shin 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
MicroRNAs (miRNAs) are a class of non-coding RNAs of approximately 21-nt which play important roles in regulating gene expression in plants. Although many miRNA studies have focused on a few model plants, the miRNAs and their target genes remain largely unknown in pepper, one of the most important crops cultivated worldwide. Here we employed high-throughput small RNA sequencing to extensively identify miRNAs in pepper from 10 different libraries, including leaf, stem, root, flower, and six developmental stage fruits. Based on bioinformatics pipeline, we successfully identified 29 and 35 families of conserved and novel miRNAs, respectively. We noticed that some miRNAs, whose targets were validated experimentally in this study, exhibited prominent changes in expression levels during fruit development stages. From the qRT-PCR analysis of the target mRNAs, including the SBP-transcription factor and F-box protein, we found that expression of these two target mRNAs gradually decreased in general during fruit development and was negatively correlated with the expression of their corresponding miRNAs. The validation of miRNA-directed cleavage of these target mRNAs, combined with the results of qRT-PCR analysis, likely suggests that some miRNAs in pepper may play a role in fruit development. Conclusively, our study first utilizes high-throughput sequencing to identify and characterize conserved and novel miRNAs and their targets in pepper, providing a basis for understanding the functional roles of miRNAs in pepper.
자연환기량과 포그분무량 조절에 의한 온실 온습도의 동시제어 기법 연구
김영복(Kim Youngbok),성현수(Sung Hyunsoo),황승재(Hwang Seungjae),김현태(Kim Hyeontae),유찬석(Ryu Chanseok) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.5
To develope a greenhouse fog cooling system to control the temperature and relative humidity simultaneously to the target value, a theoretical analysis and experiments were done. The control process includes the measuring of environmental variables, setting and coding of the water and heat balance equations to maintain the target temperature and relative humidity in greenhouse, calculating of the open level of the greenhouse roof window that governs the natural ventilation and spray water quantity, and operating of the motor to open/close the roof window and pump to spray for water. The study results were shown to be very good because the average air temperature in the greenhouse was kept to be about 28.2℃ with the standard deviation of about 0.37℃ compared to the target temperature of 28℃ and the average relative humidity was about 75.2% compared to the target relative humidity was 75% during the experiments. The average outside relative humidity was about 41.0% and the average outside temperature was 27.2℃ with the standard deviation of about 0.54℃. The average solar intensity in the greenhouse was 712.9 W. The wind velocity of outside greenhouse was 0.558 ㎧ with the standard deviation of 0.46 ㎧.
Efficient Circuit and an EM Model of an Electrostatic Discharge Generator
Yousaf, Jawad,Park, Myeongkoo,Lee, Hosang,Youn, Jinsung,Lee, Daehee,Hwang, Chanseok,Nah, Wansoo [Institute of Electrical and Electronics Engineers 2018 IEEE transactions on electromagnetic compatibility Vol.60 No.4
<P>In this work, a new technique for an efficient, simple, and fast equivalent circuit and full wave numerical modeling of the electrostatic discharge (ESD) generator is presented. A novel circuit model of the NoiseKen ESD simulator is proposed based on the frequency domain measurement of the standard waveform calibration setup. The simple full wave electromagnetic model of the same generator, which requires much less computation resources, is also proposed using commercial CST Microwave Studio software. The reliability of the proposed models as an authentic ESD excitation source is validated through an example discharge application. The good agreement between the ESD reference waveform obtained through measurement, circuit model, and 3-D model of the generator is observed.</P>
이호상(Hosang Lee),김광호(Kwangho Kim),윤진성(Jinsung Youn),이대희(Daehee Lee),황찬석(Chanseok Hwang),나완수(Wansoo Nah) 대한전기학회 2017 전기학회논문지 Vol.66 No.4
This paper proposes an analysis method of performance degradation of antenna due to radio frequency interference between an antenna and adjacent noise sources using active scattering parameters. The radio frequency interference can be analyzed by the measured or simulated scattering parameters and by excited noise sources in the circuit as well. In this paper, a planar inverted-F antenna and a noise source are designed and fabricated to analyze radio frequency interference between the planar inverted-F antenna and noise source. The proposed analysis method uses active scattering parameters, of which verification is experimentally verified, and in simulation as well.