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Monitoring the eating habits and rumination of cattle is effective for evaluating forage values and making animal management decisions for stalls and grazing pastures. Acoustic monitoring is a feasible method to monitor these activities, but it requires automatic distinction and quantification of activities to gain broader application. This automatic distinction and quantification may be possible...
The report presents a technique for imaging in vivo common carotid artery using ultrasound B-mode (Brightness-mode) moving pictures and estimating for mechanical properties related to arteriosclerosis. The method is based on reconstruction of moving pictures captured for inner wall of the artery. Mechanical properties (elongation, stiffness, and circumferential rupture strength) were also estimated...
Real time monitoring of heart rate variability (HRV) for patients in intensive care unit (ICU) is considered to be useful for predicting their septic shock occurrences. HRV is estimated from a series of heartbeat intervals (RRI). Abnormal heartbeats and very low frequency components in RRI series have to be eliminated carefully because they result in erroneous estimate of HRV. Especially, an effective...
A novel technique for imaging heart motion has been developed. This is based on measurement of minute vibration of the chest surface using 64 sensors (63- acceleration sensor and one ECG) and image processing. The chest surface vibration included three or four frequency bands. One frequency band was inaudible sound using auscultation, under 20 Hz. The results showed that clear contour image of the...
As there are various difficulties associated with auscultation techniques, it is needed to develop new technique for assisting the understanding of heartbeat for both doctors and patients. A new device for sensing vibration of the chest and signal/image processing software for visualizing heart motion and blood flow has developed. This technique is based on the measurement of chest vibration using...
We proposed a method for determining the optimum input power level which gives maximum precision in Wiener kernel measurement by the cross-correlation method.
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