focus error signal
1Myopia — For other uses, see Myopia (disambiguation). Myopia Classification and external resources ICD 10 H …
2Perceptual control theory — (PCT) is a psychological theory of animal and Human behavior originated by maverick scientist William T. Powers. In contrast with other theories of psychology and behavior, which assume that behavior is a function of perception that perceptual… …
3Control theory — For control theory in psychology and sociology, see control theory (sociology) and Perceptual Control Theory. The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is… …
4Servomechanism — [ thumb|right|200px|Industrial servomotor The grey/green cylinder is the brush type DC motor. The black section at the bottom contains the planetary reduction gear, and the black object atop the motor is the optical encoder for position feedback …
5Cerebellum — This article is about the smaller region in the lower part of the brain. For the large region of the brain, see Cerebrum. Brain: Cerebellum A human brain, with the cerebellum colored in purple …
6Brain — This article is about the brains of all types of animals, including humans. For information specific to the human brain, see Human brain. For other uses, see Brain (disambiguation). A chimpanzee brain The brain is …
7Soft — Business* Adventure Soft, UK based video game developer which was established in the 1980s by Mike Woodroffe * Cocktail Soft, Japanese H game manufacturer * Hudson Soft, Japanese publisher and developer * Illusion Soft, company from Yokohama,… …
8information theory — the mathematical theory concerned with the content, transmission, storage, and retrieval of information, usually in the form of messages or data, and esp. by means of computers. [1945 50] * * * ▪ mathematics Introduction a mathematical… …
9photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
10Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
