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Super Resolution을 활용한 위성 영상의 표적 탐지 성능 분석
한승석,이가은,최해철 한국방송∙미디어공학회 2024 방송공학회논문지 Vol.29 No.2
The images obtained from low-altitude cluster satellites suffers from lower quality and resolution compared to those acquiredfrom satellites positioned in medium or geostationary orbits, leading to reduced efficiency in surveillance and reconnaissance. Thispaper proposes a method that enhances the quality of low-resolution satellite imagery by employing Super-Resolution (SR)technology and subsequently improves detection performance by identifying targets within the enhanced imagery. The experimentsanalyze the performance of various SR neural networks concerning satellite images and demonstrated that by integrating variousSR neural networks with the prominent detection neural network, Rotated RetinaNet, it is possible to enhance detectionperformance. This combination of SR neural network and established detection framework leads to improvements in the overallaccuracy and reliability of surveillance and reconnaissance.
Change in Body Compositions of Asian Recipients after Kidney Transplantation
한승석,황진호,Yoon Jung Oh,Ran-hui Cha,안규리,김연수 대한의학회 2012 Journal of Korean medical science Vol.27 No.10
Kidney transplantation and accompanying medical conditions may result in changes in body composition. Such changes have been evaluated in Caucasian recipients, but not in Asian recipients. Herein, we conducted a study on Asian recipients because Asians have a different body composition from Caucasians. A total of 50 Asian recipients was enrolled as a prospective cohort. Using bioelectrical impedance analysis, body composition (muscle and fat mass) was assessed after 2 weeks (baseline), and at 1, 3, 6, 9, and 12 months following kidney transplantation. To find predictors related to changes, the data were analyzed by multivariate analysis using forward selection. All of the patients had good graft function during the study period. Patients gained approximately 3 kg within 1 yr of kidney transplantation. The proportion of muscle mass significantly decreased (Ptrend = 0.001) and the proportion of fat mass significantly increased over time (Ptrend = 0.002). The multivariate results revealed that male recipients, deceased donor type, and low protein intake were associated with an increase in fat mass and a decrease in muscle mass. The results from this study may help to investigate differences in body composition changes between races, as well as the factors related to these changes.
Cone 상태의 resonance 에너지 : A Complex Rotation Approach
한승석 명지대학교 자연과학연구소 2004 자연과학논문집 Vol.23 No.-
Complex scaling has been developed and applied to problems of resonances in atomic and molecular physics and in chemistry. Using the complex scaling in the square integrable (L^(2)) basis calculation we approach cone state problem to get resonances. Resonances in conical intersections have bound state characters embedded in continuum. Complex scaling이
Analysis of the Derivative Coupling Vector for the $1,2^2$ A' States of $H_3$
한승석,Han, Seung Seok Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.12
Near the conical intersection for the 1,2 $^{2}A'$ states of $H_3$ the derivative coupling vector is calculated and analyzed on the plane of internal coordinates, (U,V) or its polar coordinates $(S{\theta})$, based on the squares of the internuclear distances. It is shown that in the vicinity of the conical intersection the derivative coupling vector behaves like ${\theta}/2S$, which is responsible for the sign changes of the real-valued electronic wave function when the nuclear configuration traverses a closed path enclosing a conical intersection. The analytic property of the wave functions is studied and especially the observation of the sign change in the configuration state function (CSF) coefficients of the real-valued electronic wave functions is demonstrated.