The more extreme data mart strategy is that of the completely stand alone data mart, the concept being that its fast, easy, cheap, and delivers value immediately. I'm a supporter of this at the desktop level- thats the point of the Datamartist tool afterall.
Sleep studies are tests that record what happens to your body during sleep. The studies are done to find out what is causing your sleep problems. Sleep studies can also determine whether you have a problem with your stages of sleep. The two main types of sleep are non-rapid eye movement (NREM) and rapid eye movement (REM). Normally, NREM and REM alternate 4 to 5 times during a night's sleep.
Overnight Sleep Study. For an overnight sleep study conducted by professional sleep technicians, a patient will typically be at the sleep center for 12 hours or more. Sleep study research can reveal much about a person's health and many times can lead to a diagnosis of a very treatable sleep disorder.