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The use of accelerometer to measure sleeping posture of beef cows

机译：加速度计测量牛肉牛的睡眠姿势

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摘要

Sleep is one of the essential behaviors for mammals. The aims of this study were to validate the use of accelerometer for measuring sleeping posture of cattle. Duration of sleeping posture of seven Japanese Black cows from 19.00 to 07.00 hours was measured by both accelerometer and video, and a total of 67 accelerometer and video measurement sets were collected. We calculated Cohen's kappa coefficient between accelerometer and video measurements and 91.5% of the kappa-values were & 0.80. Intra-and inter-observer coefficient of variance showed that specific acceleration waveform patterns of sleeping posture could be easily and accurately detected by independent observers. There were no significant differences in the frequency of sleeping posture occurrences between accelerometer and video measurements. We compared averaged sleeping posture bout, and the total sleeping posture time between accelerometer and video measurements using regression. In each trait, the slope was close to 1 and the intercept was not different from 0, which showed a strong agreement between accelerometer and video measurements. This shows that an accelerometer could accurately detect sleeping postures of cattle. We conclude that adequate measurements of sleeping postures can be made using an accelerometer.
机译：睡眠是哺乳动物的重要行为之一。本研究的目的是验证加速度计测量牛牛的睡眠姿势。通过加速度计和视频从19.00到07.00小时的睡眠姿势的睡眠姿势从19.00到07.00小时测量，并且收集了总共67个加速度计和视频测量集。我们计算了加速度计和视频测量之间的Cohen的Kappa系数，91.5％的kappa值为＆amp; 0.80。观察室内和观察者间的方差系数显示，通过独立观察者可以容易地检测到睡眠姿势的特定加速波形模式。加速度计和视频测量之间的睡眠姿势频率没有显着差异。我们将平均睡眠姿势与进气仪与使用回归的视频测量之间的总睡眠姿势时间进行了比较。在每个特征中，斜坡接近1，截距与0不同，这在加速度计和视频测量之间表现出强烈的一致性。这表明加速度计可以准确地检测牛的睡眠姿势。我们得出结论，可以使用加速度计进行足够的睡眠姿势测量。

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