tailieunhanh - Vibration Analysis and Control New Trends and Developments Part 15

Tham khảo tài liệu 'vibration analysis and control new trends and developments part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 340 Vibration Analysis and Control - New Trends and Developments The amplitude of the oscillating bodies during vibrotactile stimulation was measured with a CCD laser displacement gauge LK-G3000 Keyence Co. Osaka Japan . We examined the 89 and 114 Hz frequencies and used oscillating bodies added as the frequency with double motors single motor had a pm amplitude 89 and 114 Hz-S and double motors had a pm amplitude 89 and 114 Hz-D . Specifically 89 and 114 Hz-S and 89 and 114 Hz-D were used in the next experiment. We examined the amount of salivation for the four frequencies Fig. 1E . We conducted these experiments with 17 normal subjects 15 males 2 females average age 22 years for the resting-stimulation examination. This experiment was performed between 3 and 5 pm in a temperature-controlled quiet room. The most effective salivation amount by vibrotactile stimulating the parotid glands occurred at 89 Hz-S so we examined changes in salivation for 4 or 5 continuous days with the same time schedule Fig. 1D . We also investigated the adaptation periods during continuous use of vibrotactile stimulation for 4 or 5 continuous days in the same subjects. We conducted resting-stimulation examinations with 26 normal subjects 11 males and 15 females average age 25 years . This experiment was performed between 3 and 5 pm in a temperature-controlled and quiet room. BBF on the frontal cortex The recording was conducted using a functional near-infrared spectroscopy fNIRS OEG16 instrument Spectratech Inc. Shelton CT USA from the frontal cortex. As shown in Figures 4A and 4B the fNIRS probe assembly consisted of six LEDs as light sources each of which emitted two wavelengths 770 nm and 840 nm and six photodiodes as detectors Fig. 4A 4B . The sources and detectors were symmetrically arranged in an area of cm with a nearest source-detector separation of cm and measurement points were at 16 points on the frontal cortex. During scanning a Velcro band held the .

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