Classification of behaviour in housed dairy cows using an accelerometer-based activity monitoring system

Background Advances in bio-telemetry technology have made it possible to automatically monitor and classify behavioural activities in many animals, including domesticated species such as dairy cows. Automated behavioural classification has the potential to improve health and welfare monitoring processes as part of a Precision Livestock Farming approach. Recent studies have used accelerometers and pedometers to classify behavioural activities in dairy cows, but such approaches often cannot discriminate accurately between biologically important behaviours such as feeding, lying and standing or transition events between lying and standing. In this study we develop a decision-tree algorithm that uses tri-axial accelerometer data from a neck-mounted sensor to both classify biologically important behaviour in dairy cows and to detect transition events between lying and standing. Results Data were collected from six dairy cows that were monitored continuously for 36 h. Direct visual observations of each cow were used to validate the algorithm. Results show that the decision-tree algorithm is able to accurately classify three types of biologically relevant behaviours: lying (77.42 % sensitivity, 98.63 % precision), standing (88.00 % sensitivity, 55.00 % precision), and feeding (98.78 % sensitivity, 93.10 % precision). Transitions between standing and lying were also detected accurately with an average sensitivity of 96.45 % and an average precision of 87.50 %. The sensitivity and precision of the decision-tree algorithm matches the performance of more computationally intensive algorithms such as hidden Markov models and support vector machines. Conclusions Biologically important behavioural activities in housed dairy cows can be classified accurately using a simple decision-tree algorithm applied to data collected from a neck-mounted tri-axial accelerometer. The algorithm could form part of a real-time behavioural monitoring system in order to automatically detect dairy cow health and welfare status

Application of heat and a home exercise program for pain and function levels in patients with knee osteoarthritis: A randomized controlled trial

Aim This study aimed to determine the effect of application of superficial local heat and a home exercise program on pain and function levels to patients with bilateral knee osteoarthritis. Methods This study was conducted in Turkey between January 2014 and February 2015. The sample group of the study consisted of 62 patients with osteoarthritis; 15 assigned to heat application, 15 to exercise, 15 to exercise after heat application, and 17 for the control group. While the patients in the control group received routine treatment only, the patients in the intervention group were treated with heat application, exercise, or exercise after heat application, suggested for 5 days a week for 4 weeks in addition to routine treatment. Results In this study, all of the intervention groups had decreases in Visual Analogue Scale Pain and Western Ontario and McMaster Universities Osteoarthritis Index pain, stiffness, and function scores when compared with the control group. It was found that this decrease in Visual Analogue Scale Pain and Western Ontario and McMaster Universities Osteoarthritis Index scores was mostly in the exercise group, but this condition was not statistically significant. Conclusions As a result, it is recommended that nurses train patients with osteoarthritis on heat application and home exercises and encourage them to apply these practices