relative control
41Scientific control — Take identical growing plants and give fertilizer to half of them. If there are differences between the fertilized plant group and the unfertilized control group, these differences may be due to the fertilizer. Scientific control allows for… …
42Nested case-control study — A nested case control study is a variation of a case cohort study in which only a subset of controls from the cohort are compared to the incident cases. In a case cohort study, all incident cases in the cohort are compared to a random subset of… …
43tone control — noun : a usually manual control by which a listener can adjust the relative amplitude of the high, low, and intermediate frequencies in a radio set * * * a manual control used to adjust the relative responses of an amplifier to high, low, and… …
44Mark I Fire Control Computer — Mark 1A Computer Mk 37 Director above bridge of destroyer USS Cassin Young  …
45Air traffic control radar beacon system — The air traffic control radar beacon system (ATCRBS) is a system used in air traffic control (ATC) to enhance radar monitoring and separation of air traffic. ATCRBS assists ATC radars by acquiring information about the aircraft being monitored,… …
46Real time control protocol — Real time Transport Control Protocol (RTCP) is a sister protocol of the Real time Transport Protocol (RTP). It is defined in RFC 3550 (which supersedes RFC 1889).RTCP provides out of band control information for an RTP flow. It partners RTP in… …
47Optimal control — theory, an extension of the calculus of variations, is a mathematical optimization method for deriving control policies. The method is largely due to the work of Lev Pontryagin and his collaborators in the Soviet Union[1] and Richard Bellman in… …
48Rent control — refers to laws or ordinances that set price controls on the renting of residential housing. It functions as a price ceiling.History of rent controls in AmericaIn the United States during World War I, rents were controlled through the efforts of… …
49Area Control Center — [ thumb|300px|This temporary flight restriction map from the Federal Aviation Administration shows the boundaries of the regions controlled by the Area Control Centers within and adjoining the continental United States, as well as the FAA… …
50Internal control — In accounting and organizational theory, Internal control is defined as a process effected by an organization s structure, work and authority flows, people and management information systems, designed to help the organization accomplish specific… …
