POCT in a Lab Setting Point-of-Care Kiosk in the ED ED Cardiac Length of Stay 351 297 388 367 0 100 200 300 400 500 Admitted patients Discharged patients Minutes Before POCT After POCT Lewandrowski K. Mass General Hosp., Dark Report, 8/13/01.
What is a GPS? How does it work? The Global Positioning System (GPS) tells you where you are on Earth. Itâs eleven oâclock ... do you know where your kids are? Would you like to? One way to track them would be to have a GPS receiver installed in the car! The GPS, or Global Positioning System, is one of the hottest technologies around, and no wonder. Consider these diverse uses: Minnesota scientists use GPS to study movements and feeding habits of deer.
This particular kind of GPS is called assisted GPS (AGPS), and there are several levels of assistance used. GPS A normal GPS receiver listens to a particular frequency for radio signals. Satellites send time coded messages at this frequency. Each satellite has an atomic clock, and sends the current exact time as well. The GPS receiver figures out which satellites it can hear, and then starts gathering those messages. The messages include time, current satellite positions, and a few other bits of information. The message stream is slow - this is to save power, and also because all the satellites transmit on the same frequency and they're easier to pick out if they go slow.