I have been told that wells for some systems were drilled under the sidewalk (outside the property line?).
This fact forms the basis for some systems where it is possible to overcome the house advantage.
For some systems, the clients may be also be charged for calls if they have a mobile phone rather than a landline, as 0800 numbers are generally not free from mobiles.
For some systems a decision procedure can be found; the decision problem for a system of this sort is then said to be solvable, and the system is said to be a decidable one.
A voltage dip of just 10percentt, with no interruption, can cause problems for some systems in a sixth of a second, according to Marek Samotyj, who manages power quality programs for the Electric Power Research Institute, a Palo Alto, Calif.
For some systems, any unexpected change to QoS is unacceptable.
"The textbook view can be the suitable approach for some systems.
A light turning on and off triggers motion for some systems.
In practice, for some systems, the main effects of disturbances and faults occupy different frequency domains.
Thus, it can be disastrous for some systems where failures and interruptions could be dangerous.
For some systems, inability to control the voltage and frequency may lead to unsuccessful restoration.
