id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
alkej-568	Ragib, Ahmed Mahrous	مراقب عدد دقات القلب واطئ الكلفة باستخدام متحسس الثنائي الباعث للضوء	2009	5	.pdf	application/pdf	2328	118	62	Variations in the intensity of detected light are caused by blood volume changes underneath the probe.[1] Abstract A high sensitivity, low power and low cost sensor has been developed for photoplethysmography (PPG) measurement.	cache/alkej-568.pdf	txt/alkej-568.txt