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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.
항공기 탑재 AESA 레이다의 통합 항법 성능 분석 연구
이동연(Dong-Yeon Lee),권혁준(Hyeokjoon Kwon),이동욱(Donguk Lee),이해민(Haemin Lee),정영광(Youngkwang Jung),정재현(Jaehyeon Jeong),박상규(Sanggyu Park),이성원(Sungwon Lee),박준현(June Hyune Park),탁민제(Min-Jea Tahk),방효충(Hyochoong 한국항공우주학회 2021 韓國航空宇宙學會誌 Vol.49 No.4
기존 레이다 시스템에 비해 다양한 이점을 제공하는 능동 위상 배열 (AESA) 레이다의 성공적인 운용을 위해서는 정확하고 강건한 항법이 중요하다. 본 논문은 AESA 레이다를 탑재한 항공기의 EGI 시스템을 기반으로 한 통합 항법의 성능 분석에 대한 연구를 소개한다. GPS 및 IMU 입력을 생성하는 모델이 개발되었고, GPS/IMU 약결합 항법 필터가 구성되었다. GPS/IMU 모델 및 항법필터와 함께 6자유도 항공기 시뮬레이터를 사용하여 항법 성능을 평가하는 절차가 소개되었다. 성능 분석 절차의 단계는 사례 연구와 함께 설명되었다. For successful operations of an airborne Active Electronically-Scanned Array (AESA) radar, which has various advantages over traditional radar systems, accurate and robust navigation is critical. This paper discusses a study on the performance analysis of an integrated navigation based on the Embedded GPS/INS (EGI) system for an aircraft equipped with an AESA radar. The models for generating the inputs for the GPS/IMU are developed. A navigation filter for a loosely-coupled GPS/IMU system is constructed. Overall navigation performance assessment procedure using a six degree of freedom aircraft simulator – along with the GPS/IMU models and the navigation filter – is introduced. The steps of the performance analysis procedure are explained using a comprehensive case study.
A phosphodiesterase-5 inhibitor as a potential therapeutic effector following mild ischemic stroke
Juhyeon Kang,Yeon Hee Yu,Kahyun Lee,Gangho Kim,Jaehyeon Park,Kyounguk Lee,Hansol Lee,Whiin Lee,Seungwon Choi,Dae-Young Yoo,In Koo Hwang,Dae-Kyoon Park,Kyung-Ho Park,Man-Ryul Lee,Jae-Sang Oh,Duk-Soo Ki 대한체질인류학회 2018 대한체질인류학회 학술대회 연제 초록 Vol.61 No.-
Mesoscale Spatial Variability of Linear Trend of Precipitation Statistics in Korean Peninsula
Lee, Jaehyeon,Ahn, Jaehyun,Choi, Eunsoo,Kim, Dongkyun Hindawi Limited 2016 Advances in meteorology Vol.2016 No.-
<P>This study analyzed the spatial variability of the linear trend of the precipitation mean, variance, lag-1 autocorrelation coefficient, and probability of dryness (PD) based on the precipitation data between 1981 and 2015 observed at 65 rain gages located across Korean Peninsula. While the result of the Mann-Kendall test based on the yearly statistics showed no temporal trend at most of the gage locations, the same test based on the 20-yearly statistics showed that statistically significant temporal trend exists at 54% (mean), 60% (variance), 61% (autocorrelation), and 61% (PD) among the total 65 rain gages. In addition, this study produced the map of the linear trend of the precipitation statistics. The map showed a clear regional and seasonal tendency implying that the impact of the climate change varies significantly within Korea. The variogram analysis revealed that the approximate characteristic scale of linear trend of hourly and daily precipitation statistics ranges between 50 km and 200 km and between 100 km and 250 km, respectively. This characteristic scale is significantly smaller than the spatial scale of atmospheric circulation, which suggests that future water resources management plans of Korea should consider this mesoscale variability that otherwise can be missed if it is based only on the GCM simulation results.</P>
Lee Jaehyeon,Kim So Yeon,Huh Hee Jae,Kim Namsu,Sung Heungsup,Lee Hyukmin,Roh Kyoung Ho,Kim Taek Soo,Hong Ki Ho 대한진단검사의학회 2021 Annals of Laboratory Medicine Vol.41 No.6
The rapid antigen test (RAT) for coronavirus disease (COVID-19) represents a potent diagnostic method in situations of limited molecular testing resources. However, considerable performance variance has been reported with the RAT. We evaluated the clinical performance of Standard Q COVID-19 RAT (SQ-RAT; SD Biosensor, Suwon, Korea), the first RAT approved by the Korean Ministry of Food and Drug Safety. In total, 680 nasopharyngeal swabs previously tested using real-time reverse-transcription PCR (rRT-PCR) were retested using SQ-RAT. The clinical sensitivity of SQ-RAT relative to that of rRT-PCR was 28.7% for all specimens and was 81.4% for specimens with RNA-dependent RNA polymerase gene (RdRp) threshold cycle (Ct) values ≤23.37, which is the limit of detection of SQ-RAT. The specificity was 100%. The clinical sensitivity of SQ-RAT for COVID-19 diagnosis was assessed based on the Ct distribution at diagnosis of 33,294 COVID-19 cases in Korea extracted from the laboratory surveillance system of Korean Society for Laboratory Medicine. The clinical sensitivity of SQ-RAT for COVID-19 diagnosis in the Korean population was 41.8%. Considering the molecular testing capacity in Korea, use of the RAT for COVID-19 diagnosis appears to be limited.
Pressure-driven spontaneous ion concentration polarization using an ion-selective membrane
Lee, Sang Joon,Lee, Jaehyeon,Kim, Kiwoong Elsevier 2018 Analytical Biochemistry Vol.557 No.-
<P><B>Abstract</B></P> <P>In this study, the spontaneous ion concentration polarization phenomenon induced by pressure via a cation-selective membrane was theoretically and experimentally investigated. Unlike conventional electrokinetic ion concentration polarization, which uses electric current as a driving flux of cations through the membrane, advection caused by pressure is used as a transmembrane driving flux of cations to spontaneously and stably form an ion depletion zone in the present ion concentration polarization technique. The ion depletion zone produced in a simple experimental setup was used to filter electrolyte and preconcentrate ions and microparticles. Different from the general assumption of the negligible thickness of the electric double layer in microchannels, the low concentration in the ion depletion zone considerably increased the length of the electric double layer. This enhanced the formation of the ion depletion zone. The present results can improve the understanding on ion transport in the ion concentration polarization system and can be utilized to develop a portable water desalination device for rural/remote areas and for preconcentrating biomolecules.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Advection caused by pressure generates ion concentration polarization spontaneously. </LI> <LI> Ion depletion zone filters ions and preconcentrates microparticles in a microchannel. </LI> <LI> Electric double layer inside ion depletion zone affects ion distribution in a channel. </LI> </UL> </P>