(n.) A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
(n.) A bar, as a capstan bar, applied to a rotatory piece to turn it.
(n.) An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
Example Sentences:
(1) In this experiment animals were trained to lever press in two distinctive contexts.
(2) Orientation and lever responding were not functionally related.
(3) In older stages, the cervical joints rotate according to geometric and lever arm principles.
(4) In EastEnders , the mystery surrounding the identity of Kat's secret squeeze continues amid the grinding of narrative levers and the death rattle of overflogged script-horses.
(5) Cats were trained to press a lever for 0.5--1.0 ml of milk reward both in the presence and absence of ambient light.
(6) Setting out how Britain would have a lever over the rest of the EU to demand repatriation of UK competences, Cameron said: "What's happening in Europe right now is massive change being driven by the existence of the euro.
(7) When lever pressing was established, the 2-kHz signal was presented through a speaker adjacent to the response lever according to a different set of variable intertrial intervals.
(8) Officials said the changes to the planning rules will mean it is possible to lever in billions of private sector development in low-cost housing.
(9) Rats were allowed to bar press on either of two levers (left and right).
(10) Knee flexion is synchronized with ankle dorsiflexion by a synchronizer rod and lever.
(11) In order to study the interactions between serotonergic mechanism and electrical stimulation of the mesencephalic central gray substance, rats were trained to lever-press for terminating aversive electric stimuli applied at the Periaqueductal gray and adjoining tectum of the mesencephalon.
(12) Rats were trained to press a lever to obtain a brief burst of pulses to the lateral hypothalamus.
(13) But its original meaning is the practice of using the levers of the state and of government to get difficult things done that otherwise wouldn't happen.
(14) Intact rats and rats bearing lesions of the suprachiasmatic nuclei (SCNX rats) were trained to obtain food by pressing either of two levers located on opposite sides of a cylindrical cage.
(15) We found that attenuation of lever-pressing and water intake by raclopride were not more separated in dose than after, for example, haloperidol.
(16) Young rats weaned at 16 days were taught to press a lever by shaping at 18 days and trained for 11 days (from 20 to 30 days of age) on a fixed-interval 60-sec schedule, at a rate of 5 half-hour sessions per day.
(17) In contrast, the selective norepinephrine uptake inhibitors, desipramine and talsupram, and the selective serotonin uptake inhibitor, citalopram, occasioned averages of only 13 to 19% drug-lever responding.
(18) When reinforcement was not available, each lever response produced a 0.5-sec green light on the key.
(19) Rats implanted with placebo pellets and given access to morphine reestablished lever pressing, while those given access to isotonic saline extinguished their lever pressing.
(20) Levels of acetylcholine were significantly elevated in the telencephalon and diencephalon + mesencephalon of rats killed by near-freezing during conditioned suppression of food-reinforced lever pressing, whereas levels of serotonin, dopamine, and norepinephrine were not altered.
Puller
Definition:
(n.) One who, or that which, pulls.
Example Sentences:
(1) Sixty adult chronic hair pullers completed a semistructured interview that focused on their hair-pulling behavior and demographic characteristics and that incorporated screening questions for DSM-III-R axis I disorders.
(2) Sixty-four white-faced rams and wethers were dressed with the aid of a commercial pelt puller.
(3) A commercial belt-type pelt puller and a scale that recorded force required to remove the pelt from the thickest part of the legs was used as lambs hung suspended from their front legs.
(4) Subjects were drawn from an outpatient population of chronic hair pullers who had been referred to a trichotillomania clinic or had responded to a newspaper advertisement announcing a treatment study of adults who pull out their hair.
(5) LIVE ON BIG WEBSITE LATER Transfer-deadline-day-short-straw-puller Rob Bagchi is limbering up as we type, with – and we kid you not – a computer keyboard and computer mouse in front of him.
(6) The use of a response surface procedure which allows the experimenter to change more than one factor at a time and therefore determine the desired puller condition more efficiently is demonstrated.
(7) The modification is described specifically for an Industrial Science Associates, Inc. M-1 micropipette puller.
(8) Her husband's earnings as a rickshaw puller in their village in Kurigram in the distant north were insufficient to pay for schooling for their two boys so, following other relatives, they came to Savar.
(9) However, in principle it should be applicable to any horizontal two-stage puller using a solenoid to generate the pull force.
(10) It's true that Kapoor is a crowd-puller and his recent exhibition at the Royal Academy drew unprecedented numbers for a one-man show by a living artist.
(11) Channel 5's home improvement show, House Doctor, is one of its biggest ratings pullers.
(12) The instrument resembles a conventional horizontal two-stage, solenoid-powered electrode puller but the pull is now developed by a light moving-coil and a fixed permanent magnet, using the principle of the moving-coil loudspeaker.
(13) Spanning sport and politics, you’d think it would be a crowd-puller.
(14) Details are given of a graphite heating element that can be mounted on a standard microelectrode puller and used for making quartz micropipettes.
(15) Two muscle pullers were used to study the natural mechanical actions of autogenic reflexes, which arise from muscle receptors and feed back to the muscle of origin, and heterogenic reflexes, which feed back to muscles other than the muscle of origin.
(16) The length of a given segment could be controlled to within 0.2% of the segment's length by adjusting the over-all length of the fibre by means of an electromagnetic puller and servo system.
(17) This study was constructed to detail the demographic and phenomenological features of chronic hair pullers as well as to assess psychiatric comorbidity in a sizable study group.
(18) This article highlights the use of a post puller for safe and effective removal of an intraradicular post in conjunction with retreatment.
(19) The motor and the puller assembly are separate components so that the puller assembly can be autoclaved.
(20) This paper describes an improved electrode puller for the manufacture of glass microelectrodes or micropipettes.