Contact mechanics is part of mechanical engineering. Mechatronics is an engineering discipline which deals with the convergence of electrical and mechanical systems. A third traditional branch is that of mechanical and electrical engineering. Control systems are responsible for activating and monitoring industrial or mechanical controls. It was also a first in mechanical engineering. Shannon showed an inclination towards mechanical and electrical things. At this time in contained only civil and mechanical engineering departments. Kinematic constraints are constraints on the movement of components of a mechanical system. This is an alphabetical list of articles pertaining specifically to mechanical engineering. Ingestion usually involves some type of mechanical and chemical processing. Initial flight tests showed positive results in evaluations of performance and mechanical and electronic systems. Higher crystallinity increases density and mechanical and chemical stability. Earthworms are extremely sensitive to touch and mechanical vibration. The disadvantages of aluminum wiring lie in its mechanical and chemical properties. Machine guns are controlled by one or more mechanical sears.