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This paper presents a sensorless positioning control approach for piezo-actuated systems, using a simple external circuit. To achieve high-precision positioning with a piezoelectric actuator, a feedback control system using a high-resolution position sensor in incorporated, to cancel nonlinearities and disturbances. However, sensorless control is desirable to reduce cost and space utilization in micro-...
Low-turnover bone disease is one of the bone abnormalities observed in patients with chronic kidney disease (CKD) and is recognized to be associated with low serum parathyroid hormone (PTH) level and skeletal resistance to PTH. Indoxyl sulfate (IS) is a representative uremic toxin that accumulates in the blood as renal dysfunction progresses in CKD patients. A recent in vitro study using an osteoblastic...
We have developed a Laser-Assisted Deposition (LAD) process for improving the crystalline quality of CIGS thin films and cell performance. The VOC, FF and conversion efficiency improved by the LAD process for all CIGS devices with different Ga content. In particular the Voc improved remarkably for low Ga-content CIGS devices. In fact a high efficiency low-Ga CIGS thin film solar cell was achieved...
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