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뇌파 검출을 통한 졸음지표 검출 및 소형 측정 장치 개발
안영준(Y. J. An),이충헌(C. H. Lee),박문규(M. K. Park),지훈(H. Ji),김정원(J. W. Kim),백종현(J. H. Baek),이동훈(D. H. Lee) 한국재활복지공학회 2015 한국재활복지공학회 학술대회논문집 Vol.2015 No.11
In cause total traffic accidents in Korea, drowsy driving has been shown that it is larger factors than drunk driving. Therefore, in order to prevent drowsy driving accidents, drowsiness detection and warning system for drivers has recently become a very important issue. In this study, first as a result of the drowsiness induction experiments of the frontal area 1 channel measurement method for targeting a small number of experimenters, the pattern of brain waves meaning that drowsiness state could be detected by power spectral changes of Alpha waves. miniaturized EEG devices self-develop 1-channel measurement methods and a wireless data transmission system using the LabView program for detecting drowsiness. Based on this, EEG raw data results can be monitored from PC with wireless communications. So, if signal processing algorithm and warning system for drowsiness detection take advantage of development on drowsiness prevention system of drivers may be expected lower to contribute as drowsy driving accident caused death rate.
낮은 Mach수유동 해석을 위한 Preconditioning 가중계수의 의존성
안영준(Y.J. An),신병록(B.R. Shin) 한국전산유체공학회 2010 한국전산유체공학회지 Vol.15 No.2
A dependence of weighting parameter in preconditioning method for solving low Mach number flow with incompressible flow nature is investigated. The present preconditioning method employs a finite-difference method applied Roe‘s flux difference splitting approximation with the MUSCL-TVD scheme and 4th-order Runge-Kutta method in curvilinear coordinates. From the computational results of benchmark flows through a 2-D backward-facing step duct it is confirmed that there exists a suitable value of the weighting parameter for accurate and stable computation. A useful method to determine the weighting parameter is introduced. With this method, high accuracy and stable computational results were obtained for the flow with low Mach number in the range of Mach number less than 0.3.
정세훈(S.H Jung),안영준(Y.J An),신병록(B.R. Shin) 한국전산유체공학회 2009 한국전산유체공학회 학술대회논문집 Vol.2009 No.4
Numerical analysis of two dimensional incompressible laminar free jet flow was carried out by using finite difference SMAC scheme. Flow characteristics of free jet flow such as jet width, similarity of jet velocity and hypothetical origin were investigated for different Reynolds numbers of Re=30 and 100. The reliability of predictions were confirmed by comparison with exact solution. Non-dimensional velocity distribution showed similarity of jet flow velocity after initial region. In the region of laminar flow, the location of hypothetical origin becomes more distant with Reynolds number.
정세훈(S.H Jung),안영준(Y.J An),신병록(B.R Shin) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Numerical analysis of two dimensional incompressible laminar free jet flow was carried out by using finite difference SMAC scheme. Flow characteristics of free jet flow such as jet width, similarity of jet velocity and hypothetical origin were investigated for different Reynolds numbers of Re=30 and 100. The reliability of predictions were confirmed by comparison with exact solution. Non-dimensional velocity distribution showed similarity of jet flow velocity after initial region. In the region of laminar flow, the location of hypothetical origin becomes more distant with Reynolds number.