Four Types of Actuators. An actuator is a kind of motor that controls or moves mechanisms or systems. It takes hydraulic fluid, electric current or other sources of power and converts the energy to facilitate the motion.
Dercumâs disease, also known as adiposis dolorosa, is a rare disorder characterized by multiple, painful growths consisting of fatty tissue, called lipomas. They mainly occur on the trunk, the upper arms and upper legs and are found just below the skin.
Most patients are women, and onset is usually at age 40-60 years, but the syndrome also can affect men and children. The onset is insidious. The first symptoms in primary SjÃ¶gren syndrome can be easily overlooked or misinterpreted, and diagnosis can be delayed for as long as several years.