Pavlovian iPosture is no slouch  Battery-operated device
contains a microchip that monitors the wearer's stance several
times a second, vibrating briefly when it detects a deviation.
The iPosture can be worn as a pendant, attached to the skin with
adhesive patches, or clipped to a shirt or bra.   Thanks to
nanosensor technology, your mother doesn't need to tell you to
stand up straight anymore. A new gadget called iPosture will do
that job for her.  The battery-operated device contains a
microchip that monitors the angle of the wearer's upper chest
several times per second, vibrating briefly when it senses a
deviation greater than three degrees from the programmed ideal
stance. Specialized software filters spurious movements, which
allows the iPosture to adapt to various body types and
activities--presumably stopping it from zapping you in the
middle of sit-ups, for example. It's an inch in diameter and can
be clipped to a shirt or bra, worn as a pendant, or attached to
the skin with special adhesive patche