ByoungWook Choi

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BACKGROUND The aim of this study was to determine whether the extent of late gadolinium enhancement (LGE) is associated with left ventricular (LV) function in patients with hypertrophic cardiomyopathy (HCM). METHODS AND RESULTS Forty-seven patients with HCM (35 males, mean age 53+/-14, 14 with LV outflow tract obstruction) underwent cardiovascular(More)
Autonomous navigation of mobile robot requires a ranging system for measurement of distance to environmental objects. It is obvious that the wider and the faster distance measurement gives a mobile robot more freedom in trajectory planning and control. The active omni-directional ranging system proposed in this paper is capable of obtaining the distance for(More)
This paper presents a monocular PSD-based motion capture system and CCD camera based system. The first system includes a PSD (Position Sensitive Detector) and active infrared (IR) LED markers that are placed on the object to be tracked. The PSD sensor is placed in the focal plane of a wide-angle lens. The microcontroller calculates the 3D position of the(More)
In this paper, we present an experimental approach to compare various trajectory planning methods for practical application of wheeled mobile robots. The first method generates a trajectory according to the acceleration limits of the mobile robot and its relationship with the curvature of the planned path. The second method is an improvement of the(More)
 According to KEC 2005 of Accreditation Board for Engineering Education of Korea, criterion 2 defines twelve program outcomes which specify the knowledge, skills, and attitudes which students of a program should meet at time of graduation. To demonstrate achievement of program outcomes, target level of outcomes should be established and appropriate tools(More)
This paper presents a rule-based expert system for the optimal problem of photovoltaic(PV) system using discrete particle swarm optimization(PSO) in distribution power system. Expert system is applied on the discretization for a real-valued particle's velocity to a multi-valued discrete variable. In the discrete PSO procedures, several rules in terms of(More)
BACKGROUND There have been limited reports on the diagnostic performance and prognostic value of coronary computed tomography angiography (CCTA) for selecting coronary artery bypass graft (CABG) candidates. METHODS There were 1,018 patients with suspected coronary artery disease who underwent 64-slice multidetector CCTA between July 2009 and January 2010.(More)
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