master-slave system is actually not passive in that the operator
is within the system, though the wave-based method has
originated from the passivity theory [16]. A comparative study
on control schemes for teleoperation with time delays could
be found in [17], which implies that a thorough understanding
of the characteristics of Internet delay is essential but rather
intangible. Stability analysis of an Internet-based robot system
under variable time delay and packet loss could be found in
[29]. Son et al.