Deokwon Yun

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Rotating stages in semiconductor industry, biotechnology and many other fields require challenging accuracy to perform their functions properly. To evaluate and improve the performance of such precision machinery, it is inevitable to consider the error motion on which knowledge can be used for error compensation, error-reducing design, and other improvement(More)
Patients with paralyzed upper extremities due to central nervous system lesion after stroke, traumatic brain injury and spinal cord injury receive rehabilitation therapy. The rehabilitation robot is studied for the effective therapy. To train the patients more effectively, it is necessary to study not only mechanisms of robots but also control strategy for(More)
Rotating stages in semiconductor, display industry and many other fields require challenging accuracy to perform their functions properly. Especially, Axis of rotation error on rotary system is significant; such as the spindle error motion of the aligner, wire bonder and inspector machine which result in the poor state of manufactured goods. To evaluate and(More)
OBJECTIVE To investigate the clinical feasibility of a newly developed, portable, gait assistive robot (WA-H, 'walking assist for hemiplegia') for improving the balance function of patients with stroke-induced hemiplegia. METHODS Thirteen patients underwent 12 weeks of gait training on the treadmill while wearing WA-H for 30 minutes per day, 4 days a(More)
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