U.S. Justice Department: Does Neighborhood Watch reduce crime? Neighborhood Watch programs became popular in the 1970s and 1980s; by 2000, roughly 40% of the U.S. residential population was covered by such citizen crime-watching programs.
Definition of actuarial. 1  1 : of or relating to actuaries. 2  2 : relating to statistical calculation especially of life expectancy.
Robot Actuators - Different Types. An actuator is a mechanism for activating process control equipment by the use of pneumatic, hydraulic, or electronic signals. There are several types of actuators in robotic arms. Synchronous Actuator - The motor contains a rotor that rotates in synchrony with the oscillating field or current.