Love these discussions, I always learn SO much. Thanks Lee. I understand Bill's concern, it seems this is the society we find ourselves in and I believe we are in it's infancy.
John On Oct 11, 2013, at 9:09 PM, Lee Larson <[email protected]> wrote: >> On Oct 11, 2013, at 4:39 PM, John Robinson <[email protected]> wrote: >> >> I read an article several months ago of using bluetooth packaging for items >> at the grocery. Every product would have built into the bottle, box, sack >> etc a wafer thin bluetooth device, so a few or hundreds of items in carts >> would be pushed through the checkout readers and instantly the cost would be >> generated. > > There are two related technologies floating around. The other one is RFID. > This shopping cart thing sounds more like RFID because it's a lot cheaper > since only one side needs a battery. The RFID chips are not much bigger than > a large grain of rice. When one comes near an RFID reader, a passive field > comes to life and it sends information to the reader. > > The advantage of RFID is that the chips are really cheap. The disadvantage is > that the range is pretty short. > > Lots of big companies like Wal-Mart are using RFID to keep track of boxes in > their logistics. The UofL library uses RFID to keep track of books. > > > > > > > _______________________________________________ > MacGroup mailing list > [email protected] > http://www.math.louisville.edu/mailman/listinfo/macgroup > _______________________________________________ MacGroup mailing list [email protected] http://www.math.louisville.edu/mailman/listinfo/macgroup
