Sewoong Kim

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A novel actuator concept has been developed and prototyped. By integrating a multi-speed transmission with a high performance permanent magnet DC servomotor, it has been shown that an electrical drive can provide power/torque density and physical size that approaches the capabilities of electrohydraulics. Preliminary experimental tests of the prototype are(More)
We investigate the potential of mobile smartphone-based multispectral imaging for the quantitative diagnosis and management of skin lesions. Recently, various mobile devices such as a smartphone have emerged as healthcare tools. They have been applied for the early diagnosis of nonmalignant and malignant skin diseases. Particularly, when they are combined(More)
  • Sewoong Kim
  • 2008 IEEE International Conference on Robotics…
  • 2008
This paper presents a modeling of brushless dc motor based servo actuator for manipulators, and described dynamic and fault analysis of the actuator using the model A new model of brushless dc motors, which have delta windings, is proposed. Nonlinear model of the actuator, which has ball screw and spur gears, is presented, too. Nonlinear modeling of(More)
This paper proposes a methodology for the operational fault detection (OFD) of telerobotic systems using discrete wavelet transform and AC analysis. For the generalization of the proposed methodology, the sensor considered in this study is confined to the sensor, which is usually installed in the standard or general configuration of telerobots, such as(More)
This paper described an error analysis of a camera/laser range finder sensor head to characterize the effects of an error of the sensor head components, and a calibration of the sensor head. The sensor head of the telerobotic system, which is being developed for D&D operation of nuclear facilities, improves the work efficiency of a human operator(More)
Reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) provides a valuable opportunity to study neurodevelopmental and neurodegenerative psychiatric diseases by offering an unlimited source for patient-specific neuronal and glial cells. The present review focuses on the recent advancements in modeling psychiatric disorders such as(More)
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