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오경석(Kyungseok Oh),김원호(Wonho Kim),공정환(Junghwan Gong),이승환(Seunghwan Lee) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
기존연구에서는 인간 추적을 위해 딥러닝 API인 Detectron2기반의 Faster R-CNN 모델을 활용한 방법이 제안되었다. 하지만, Detectron2기반 방법의 정확도는 우수하지만 실시간 적용에 어려움이 있다. 따라서, 본 논문에서는 인간 탐지를 위해 YOLOv3 모델을 이용하여 인간 추적 속도를 개선하고자 하였다. 실험을 통해 기존연구에 비해 제안한 방법의 추적속도가 크게 향상됨을 보였다.
迎隨補法과 捻轉補法이 體熱變化에 미치는 상대적 효과 비교
이봉효(Bonghyo Lee),김재순(Jaesoon Kim),박재현(Jaehyeon Park),박종혁(Jonghyeok Park),윤용식(Yongsik Yun),이경석(Kyungseok Lee),이은정(Eunjung Lee),박지하(Jiha Park),이경민(Kyungmin Lee) 한국한의학연구원 2010 한국한의학연구원논문집 Vol.16 No.2
Objectives : The directional supplementation and draining and twirling supplementation and draining have been used widely in oriental medical clinic. The aim of this study is to compare the effects between directional supplementation and draining method and twirling supplementation and draining. Methods : Clinical experiment was performed with 21 students of oriental medical college of Daegu Haany university. Acupuncture was applied at left Hapgok (LI4) with directional supplementation and twirling supplementation respectively, and the thermographic change was checked using DITI (Digital Infrared Thermographic Image). Results and Conclusion : A significant thermographic change was observed at bilateral Igan (LI2), Yanggye (LI5), Gokji (LI11), and Yeonghyang (LI20) in directional supplementation. A significant thermographic change was observed at bilateral Igan (LI2), Yanggye (LI5), and Yeonghyang (LI20) in twirling supplementation. Based on the thermographic change, it could be demonstrated that directional supplementation is more effective that twirling supplementation.
De-NOx characteristics of HC-SCR system employing combined Ag/Al2O3 and CuSn/ZSM-5 catalyst
Kyungseok Lee,Byung Chul Choi,김철호,이춘범,오광철 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-
The combination of Ag/Al2O3 and CuSn/ZSM-5 on catalytic performance was investigated for selectivecatalytic reduction of NOx by H2-assisted C3H6. The Ag loading significantly affected the de-NOxperformance and C3H6 conversion; a low Ag loading in the catalyst (less than 2 wt% Ag) afforded superiorde-NOx performance compared to that obtained with more than 4 wt% Ag, owing to the lack ofagglomeration of Ag particles on the support (Ag/Al2O3) in the former. Considering the C3H6 slip, a veryhigh reaction temperature (above 525℃) was required for complete C3H6 oxidation. A combination of Ag/Al2O3 and CuSn/ZSM-5 allowed complete C3H6 oxidation below 350℃ owing to the superior C3H6oxidation ability of CuSn/ZSM-5, which is the merit of the combined system compared with Ag/Al2O3 orCuSn/ZSM-5 used individually. The best catalytic configuration is the sequential arrangement of 1Ag/Al2O3 + 2Cu1Sn/ZSM-5, which could simultaneously reduce NOx, C3H6, and H2 over a wider temperaturewindow ranging from 300‒600℃. Notably, the reduced NOx was almost entirely reduced to N2 withnegligible generation of N2O, NH3, and HCNO.
Effect of Passive Temperature Therapy of the Femoral Muscles on the Countermovement Jump Performance
Lee, Jintaek,Panday, Siddhartha Bikram,Byun, Kyungseok,Lee, Jusung,Hwang, Jinny,Moon, Jeheon Korean Society of Sport Biomechanics 2019 한국운동역학회지 Vol.29 No.4
Objective: The purpose of this study was to evaluate the effect of passive-acute temperature therapy of the femoral muscle and dynamic warm-up on the countermovement jump performance. Method: Twenty male track and field athletes from national team underwent three treatments applied on the femoral muscles; cold temperature treatment, thermal treatment and dynamic warm-up. The variables extracted at 2 time points (pre-measurement and post measurement) were the temperature of the left and right femoral muscle, displacement & velocity of centre of mass, peak power out, range of motion and moment & power of the knee joint. Results: There was a statistically significant difference in the temperature of the femoral muscle according to measurement time which was high in the order of thermal treatment, dynamic treatment and cold treatment. The jump height was the highest in the dynamic warm-up with no statistically significant difference for the range of motion of the knee joint. The peak power out at dynamic warm-up and the power of the knee joint were statistically significant according to the treatment and measurement time. Conclusion: Local cold and thermal treatment of femoral muscles at ambient temperature did not improve jump performance, while dynamic warm-up was considered to be effective for maintaining the performance of the activities that require strong muscular power.
Kyungseok Park,DIBY PAUL,Yong Ki Kim,Ki Woong Nam,Young Kee Lee,Hyo Won Choi,Sang Yeob Lee 한국식물병리학회 2007 Plant Pathology Journal Vol.23 No.1
Biocontrol activity of five strains of selected rhizobacteria were tested in tomato against bacterial wilt caused by Ralstonia solanacearum. After root bacterization the plants were grown in a perlite-hydroponic system. Upon challenge inoculation with the pathogen, all of the rhizobacterial strains efficiently suppressed the bacterial wilt in tomato in various rates, at maximum by the strain, Bacillus vallismortis strain EXTN-1. While the percent of infected plants in the non-bacterized control plants were 95%, it was only 65% in plants pre-treated with EXTN-1. It was also demonstrated that the movement of R. solanacearum within the stem was significantly hampered when the plants were root bacterized. As EXTN-1 has no antagonistic properties against R. solanacearum, the bacterial wilt was probably suppressed by a mechanism other than antibiosis. Previously, the strain had been proven to produce an efficient elicitor for inducing systemic resistance in many crops. As the present study confirmed that EXTN-1 has the ability for reducing the pathogen spread in tomato, the strain could be effectively used as a potential biocontrol agent against bacterial wilt.
Kyungseok Lee,Byungchul Choi,Chunbeom Lee,Kwang Chul Oh 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-
This study aims to investigate the catalytic performance of 2Cu/ZSM-5 with different SiO2/Al2O3 ratios(30, 75, and 90) for selective catalytic reduction (SCR) of NOx by C3H6. The coexistent CO and H2 in theC3H6-SCR process were also evaluated to further improve the de-NOx performance. The SiO2/Al2O3 ratiosand coexistent CO and H2 significantly affected the de-NOx performance and its operating temperaturewindow. The addition of 1 wt.% metal additives (Pt, Ce, Sn, and Mn) to 2Cu/ZSM-5 exhibited a distinctimprovement in catalytic performance. Among the metal-additive catalysts, 2Cu1Sn/ZSM-5 demonstratedfavorable NOx conversion in the H2- or CO-C3H6-SCR process owing to the enhancement of partialoxidation of C3H6 by H2. This resulted in improved low-temperature catalytic performance, without anyaccompanying side reactions that produce NH3, N2O, and HNCO.
Lee, Kyungseok,Kosaka, Hidenori,Sato, Susumu,Yokoi, Toshiyuki,Choi, Byungchul,Kim, Daesuk Elsevier 2019 Journal of industrial and engineering chemistry Vol.72 No.-
<P><B>Abstract</B></P> <P>The objective of this study is to investigate the catalytic performance of Cu-zeolite catalysts supported on various types of zeolites (chabazite, MFI, and BEA) for selective catalytic reduction with C<SUB>3</SUB>H<SUB>6</SUB>. 2Cu/ZSM-5 exhibited a nearly 70% de-NOx performance at 360°C, Cu/SSZ-13 and Cu/BETA exhibited less than 60%. The loading of Cu also exhibited different de-NOx performances, which were related to the chemical states of Cu. The isolated Cu<SUP>2+</SUP> ion was favorable to the NOx reduction compared to the bulk CuOx species. The effects of O<SUB>2</SUB>, CO<SUB>2</SUB> concentrations and hydrothermal aging were investigated for the 2Cu/ZSM-5 catalyst.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Various amounts of Cu were impregnated into SSZ-13, ZSM-5 and BETA zeolite. </LI> <LI> 2Cu/ZSM-5 exhibited the highest NOx conversion. </LI> <LI> O<SUB>2</SUB> significantly affected temperature window of NOx reduction for C<SUB>3</SUB>H<SUB>6</SUB>-SCR. </LI> <LI> CO<SUB>2</SUB> negatively impacted on NOx conversion and partial oxidation of C<SUB>3</SUB>H<SUB>6</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>