Butsabong, Kiadtirat, Aphisith Thephavongsa, and worawat Sa-Ngiamvibool. 2021. “Fall Detection System for the Elderly People using the Earth’s Gravity: doi: 10.14456/mijet.2021.11”. Engineering Access 7 (1). Mahasakham, Thailand:78-84. https://ph02.tci-thaijo.org/index.php/mijet/article/view/10.14456.mijet.2021.11.