Lan, G. , Khalifa, S. , Hassan, M. and Hu, W. 2015. Estimating Calorie Expenditure from Output Voltage of Piezoelectric Energy Harvester - an Experimental Feasibility Study. EAI Endorsed Transactions on Pervasive Health and Technology. 2, 7 (Dec. 2015), e4. DOI:https://doi.org/10.4108/eai.28-9-2015.2261453.