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김영남,김민녕,이건민,김두용,김기완 순천향대학교 부설 산업기술연구소 2014 순천향 산업기술연구소논문집 Vol.20 No.2
Due to the development in information technology, people have become more interested in healthcare technology. In this paper, we implement a health care device to calibrate human gait. The pressure sensors are attached inside a pair of shoes. The sensors measure pressures under the foot and transmit the measured values to the CPU. The collected data are sent to the smart phone through Bluetooth. When users run our calibration system, they can monitor and correct their walking posture.
고주파 마그네트론 스퍼터링 방법에 의해 MgO(100) 기판위에 증착된 (Pb, La) TiO_3 박막의 제작과 특성연구
張志根,張鎬廷,金敏寧,嚴于鎔 단국대학교 1995 論文集 Vol.29 No.-
Pyroelectric (Pb, La) TiO_3 (PLT) thin films have been prepared on Pt coated MgO(100) substrate by RF magnetron sputtering method in an atmosphere of mixed gas of Ar and O_2. PLT file deposited at 580℃ showed perovskite single phase with prominent C-axis orientation perpendicular to the substrate surface. The full width at half maximum (FWHM) of the PLT film was 0.45 degree indicating good crystallinity. From the RHEED observation, the PLT film showed spotty pattern, indication a single crystal phase with rough film surface. The relative dielectric constant(ε_r) and dielectric loss(tanδ) of the perovskite PLT film deposited at 580℃ were 75 and 0.006 at 1kHz, respectively. From the hysterisis loop analysis using sawyer-tower circuit, the remanent polarization(P_r) and coercive field(E_c) were about 10μC/㎠ and 160kV/㎝, respectively.