|
neuron
neuron specialized cell in animals that, as a unit of the nervous system , carries information by receiving and transmitting electrical impulses.
...
Read more
|
|
Saint Lawrence Seaway
Saint Lawrence Seaway international waterway, 2,342 mi (3,769 km) long, consisting of a system of canals, dams, and locks in the St. Lawrence River and connecting channels between the Great Lakes; opened 1959. It provides passage for large oceangoing vessels into central North America. The seaway i...
Read more
|
|
|
control systems
control systems combinations of components (electrical, mechanical, thermal, or hydraulic) that act together to maintain actual system performance close to a desired set of performance specifications. Open-loop control systems (e.g., automatic toasters and alarm clocks) are those in which the outpu...
Read more
|
|
International System of Units
International System of Units officially called the Système International d'Unités, or SI, system of units adopted by the 11th General Conference on Weights and Measures (1960). It is based on the metric system . The basic units of length, mass, and time are those of the mks system ...
Read more
|
|
|
autonomic nervous system
autonomic nervous system The part of the nervous system which controls involuntary activities such as homoeostasis. The autonomic nervous system is regulated by the hypothalamus and comprises two antagonistic parts, the parasympathetic and sympathetic nervous systems. See also CENTRAL NERVOUS SYSTEM...
Read more
|
|
ampere
ampere , abbr. amp or A, basic unit of electric current. It is the fundamental electrical unit used with the mks system of units of the metric system . The ampere is officially defined as the current in a pair of equally long, parallel, straight wires 1 meter apart that produces a force of 0.0000...
Read more
|
|
nervous system
nervous system network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system. Invertebrate animals show varying degrees of complexity in their nervous system...
Read more
|
|
|
noise
noise any signal that does not convey useful information. Electrical noise consists of electrical currents or voltages that interfere with the operation of electronic systems. Electrical noise limits the sensitivity of radio receiving systems and, when present at high enough levels, may cause false...
Read more
|
|
|
gauss
gauss [for C. F. Gauss ], abbr. G, unit of magnetic flux density (see flux, magnetic ) equal to 0.0001 (10 -4 ) weber per square meter. Since this unit is derived from the cgs system of units rather than the mks system , it is largely obsolete. See electric and magnetic units .
...
Read more
|
|
|
Nikola Tesla
Nikola Tesla , 1856-1943, American electrician and inventor, b. Croatia (then an Austrian province). He emigrated to the United States in 1884, worked for a short period for Edison, and became a naturalized American citizen (1891). A pioneer in the field of high-voltage electricity, he made many dis...
Read more
|
