An abnormal detector comprises means for determining the position of the moving object and the direction in which the moving object moves, means for determining the place where an abnormal incident causing {HEAD ~ an abnormal behavior} of the moving object occurs on {TAIL ~ the basis} of the determined position and direction, and means for displaying the place where the abnormal incident occurs 
An abnormal detector comprises means for determining the position of the moving object and the direction in which the moving object moves , means for determining the place where an abnormal incident causing { HEAD ~ an abnormal behavior } of the moving object occurs on { TAIL ~ the basis } of the determined position and direction , and means for displaying the place where the abnormal incident occurs
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