feedback mechanism
71Trip distribution — (or destination choice or zonal interchange analysis), is the second component (after trip generation, but before mode choice and route assignment) in the traditional four step transportation forecasting model. This step matches tripmakers’… …
72G protein-coupled receptor — G protein coupled receptors (GPCRs), also known as seven transmembrane domain receptors, 7TM receptors, heptahelical receptors, and G protein linked receptors (GPLR), comprise a large protein family of transmembrane receptors that sense molecules …
73Avalanche transistor — An Avalanche Transistor is a bipolar junction transistor designed for operation in the region of its collector current/collector to emitter voltage characteristics beyond the collector to emitter breakdown voltage, called avalanche breakdown… …
74Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …
75Paleoclimatology — (also Palaeoclimatology) is the study of climate change taken on the scale of the entire history of Earth. It uses records from ice sheets, tree rings, sediment, and rocks to determine the past state of the climate system on Earth. Reconstructing …
76Stepper motor — A stepper motor (or step motor) is a brushless, synchronous electric motor that can divide a full rotation into a large number of steps. The motor s position can be controlled precisely, without any feedback mechanism (see open loop control).… …
77Digestive enzyme — Digestive enzymes are enzymes that break down polymeric macromolecules into their smaller building blocks, in order to facilitate their absorption by the body. Digestive enzymes are found in the digestive tract of animals (including humans) where …
78Traffic policing — is monitoring network traffic for conformity with a traffic contract and if required, dropping traffic to enforce compliance with that contract. Traffic sources which are aware of a traffic contract sometimes apply Traffic Shaping in order to… …
79Hypothalamic-pituitary-gonadal axis — The hypothalamic pituitary gonadal axis (also HPTA) is a way of referring to the combined effects of the hypothalamus, pituitary gland, and gonads as if these individual endocrine glands were a single entity. Because these glands often behave in… …
80Tsunami Evaluation Coalition — The Tsunami Evaluation Coalition (TEC) [http://www.alnap.org/tec] is a unique learning and accountability initiative in the relief and development sector. It was first established in February 2005 to carry out joint evaluations of the response to …
