Dartmouth-Led Team Develops WristWhirl, a Smartwatch Prototype Using Wrist as
  a Joystick
From: Dartmouth - 10/14/2016

A Dartmouth-led team has come up with a solution by developing WristWhirl — a
smartwatch prototype that uses the wrist wearing the watch as an
always-available joystick to perform common touch screen gestures with
one-handed continuous input.

Read the entire article at:
http://www.dartmouth.edu/press-releases/wristwhirl-joystick-101416.html

Links:
WristWhirl: One-handed Continuous Smartwatch Input using Wrist Gestures
http://xingdongyang.net/papers/Wristwhirl.pdf

WristWhirl: One-handed Continuous Smartwatch Input using Wrist Gestures
  (video 3:30)
https://www.youtube.com/watch?v=JTPzeZGiI8w&t=10s

Xing-Dong Yang
http://dartmouth.edu/faculty-directory/xing-dong-yang