| inductive current drive | <physics> Method to drive current in a toroidal plasma by using the torus of conducting plasma as the second coil in a transformer. The primary coil usually runs down the centre of the torus, changes in the current driven through the primary coil create changing magnetic fields which drive current in the plasma. The current thus driven can be used to heat the plasma as well (see also ohmic heating, induction). (09 Oct 1997) |
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| radio frequency current drive | <radiobiology> Plasma waves in the radio-frequency range can be used to push plasma particles in such a way that current forms in the plasma, this is a method of non-inductive current drive which would allow for steady-state fusion reactors to operate. (09 Oct 1997) |
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| current drive | <radiobiology> Any of a variety of techniques used to cause current flow in a plasma. See inductive current drive, RF current drive, non-inductive current drive. Usually applied to schemes used to generate current in tokamaks and other toroidal devices which require internal plasma currents. See: bootstrap current. (09 Oct 1997) |
| inductive | 1. Leading or drawing; persuasive; tempting; usually followed by to. "A brutish vice, Inductive mainly to the sin of Eve." (Milton) 2. Tending to induce or cause. "They may be . . . Inductive of credibility." (Sir M. Hale) 3. Leading to inferences; proceeding by, derived from, or using, induction; as, inductive reasoning. 4. <physics> Operating by induction; as, an inductive electrical machine. Facilitating induction; susceptible of being acted upon by induction; as certain substances have a great inductive capacity. <physics> Inductive embarrassment, the retardation in signaling on an electric wire, produced by lateral induction. Inductive philosophy or method. See Philosophical induction, under Induction. Inductive sciences, those sciences which admit of, and employ, the inductive method, as astronomy, botany, chemistry, etc. Origin: LL. Inductivus: cf. F. Inductif. See Induce. Source: Websters Dictionary (01 Mar 1998) |
| inductive resistance | The weakening of an alternating electric current by passage through a coil of wire or a condenser. Synonym: inductive resistance. (05 Mar 2000) |
| meiotic drive | Differential fitness in males and females. (05 Mar 2000) |
| direct drive | <radiobiology> An approach to inertial-confinement fusion in which the energy of the driver (laser or particle beam) is directly incident on the (usually spherical) target, causing compression heating via ablation of the target surface. (09 Oct 1997) |
| drive | 1. To rush and press with violence; to move furiously. "Fierce Boreas drove against his flying sails." (Dryden) "Under cover of the night and a driving tempest." (Prescott) "Time driveth onward fast, And in a little while our lips are dumb." (Tennyson) 2. To be forced along; to be impelled; to be moved by any physical force or agent; to be driven. "The hull drives on, though mast and sail be torn." (Byron) "The chaise drives to Mr. Draper's chambers." (Thackeray) 3. To go by carriage; to pass in a carriage; to proceed by directing or urging on a vehicle or the animals that draw it; as, the coachman drove to my door. 4. To press forward; to aim, or tend, to a point; to make an effort; to strive; usually with at. "Let them therefore declare what carnal or secular interest he drove at." (South) 5. To distrain for rent. To let drive, to aim a blow; to strike with force; to attack. "Four rogues in buckram let drive at me." 1. To impel or urge onward by force in a direction away from one, or along before one; to push forward; to compel to move on; to communicate motion to; as, to drive cattle; to drive a nail; smoke drives persons from a room. "A storm came on and drove them into Pylos." (Jowett (Thucyd)) "Shield pressed on shield, and man drove man along." (Pope) "Go drive the deer and drag the finny prey." (Pope) 2. To urge on and direct the motions of, as the beasts which draw a vehicle, or the vehicle borne by them; hence, also, to take in a carriage; to convey in a vehicle drawn by beasts; as, to drive a pair of horses or a stage; to drive a person to his own door. "How . . . Proud he was to drive such a brother!" (Thackeray) 3. To urge, impel, or hurry forward; to force; to constrain; to urge, press, or bring to a point or state; as, to drive person by necessity, by persuasion, by force of circumstances, by argument, and the like. " Enough to drive one mad." "He, driven to dismount, threatened, if I did not do the like, to do as much for my horse as fortune had done for his." (Sir P. Sidney) 4. To carry or; to keep in motion; to conduct; to prosecute. [Now used only colloquially] "The trade of life can not be driven without partners." (Collier) 5. To clear, by forcing away what is contained. "To drive the country, force the swains away." (Dryden) 6. <chemical> To dig Horizontally; to cut a horizontal gallery or tunnel. 7. To pass away; said of time. Drive, in all its senses, implies forcible or violent action. It is the reverse of to lead. To drive a body is to move it by applying a force behind; to lead is to cause to move by applying the force before, or in front. It takes a variety of meanings, according to the objects by which it is followed; as, to drive an engine, to direct and regulate its motions; to drive logs, to keep them in the current of a river and direct them in their course; to drive feathers or down, to place them in a machine, which, by a current of air, drives off the lightest to one end, and collects them by themselves. "My thrice-driven bed of down." Origin: AS. Drifan; akin to OS. Driban, D. Drijven, OHG. Triban, G. Treiben, Icel. Drifa, Goth. Dreiban. Cf. Drift, Drove. Source: Websters Dictionary (01 Mar 1998) |
| exploratory drive | The drive typical of toddlers and some animals to investigate the unfamiliar or unknown. (05 Mar 2000) |
| learned drive | Causing motion; having power to move, or tending to move; as, a motive argument; motive power. "Motive faculty. <machinery> " Motive power, a natural agent, as water, steam, wind, electricity, etc, used to impart motion to machinery; a motor; a mover. Source: Websters Dictionary (01 Mar 1998) |
| action current | An electrical current induced in muscle fibres when they are effectively stimulated; normally it is followed by contraction. (05 Mar 2000) |
| alternating current | Electrical current which alternates direction periodically. (For instance, household electric current is AC alternating at 60 oscillations/sec (60 Hertz) in the United States, and 50 Hertz in many other countries.) Acronym: AC (09 Oct 1997) |
| anodal current | A current produced in tissues under the anode when the circuit is closed. (05 Mar 2000) |
| ascending current | The direction of current flow in a nerve when the anode is placed peripheral to the cathode, in contrast to descending current; the convention used is that current flows from positive to negative. Synonym: centripetal current. (05 Mar 2000) |
| axial current | The central rapidly moving portion of the bloodstream in an artery. (05 Mar 2000) |
| bootstrap current | <radiobiology> Currents driven in toroidal devices by neo-classical diffusion. They may amount to a substantial fraction of the net current in a tokamak reactor, thus lengthening the pulse time or decreasing the power needed for current drive. (09 Oct 1997) |