علم الزمن والوقت
Since the day I started research in the subject of “time” and “sleep and insomnia” consecutively for about thirty years, by reading about “the standard sleeping hours”. Quantitative research is used to set a specific quantitative criterion to every schedule like: the number of working hours, the number of rest …
أكمل القراءة »“Number of Sleeping Hours” and “the Circumstances of sleep” … which one is better
