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.1  Brushless DC Servo-This synchronous electric motor features permanent magnet poles on the rotor, which are attracted to the rotating poles of the opposite magnetic polarity in the stator creating torque.ynchronous Actuator-The motor contains a rotor that rotates in synchrony with the oscillating field or current. 1  Brushless DC Servo-This synchronous electric motor features permanent magnet poles on the rotor, which are attracted to the rotating poles of the opposite magnetic polarity in the stator creating torque.