| GVF | good visual fields |
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| t | Greek lower case letter tau; life [of radioisotope]; relaxation time; shear stress; spectral transmi... |
| AEF | Auditory evoked fields |
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| CHEF | Clamped Homogeneous Electric Fields |
| cRF | Classical receptive fields |
| MF | Magnetic Fields |
| SBS | Shear bond strength |
| shear fields | <radiobiology> As used in plasma physics, this refers to magnetic fields having a rotational transform (or, alternatively, safety factor) that changes with radius (for example, in the stellarator concept, magnetic fields that increase in pitch with distance from the magnetic axis.) (09 Oct 1997) |
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| H fields | Three circumscript, myelin-rich regions of the subthalamus known as H fields (from Haubenfelder); 1) field H1, corresponding to the thalamic fasciculus, a horizontal fibre stratum at the junction of the subthalamus and the overlying thalamus, is composed of pallidothalamic and cerebellothalamic fibres (brachium conjunctivum) and is separated by the zona incerta from the more ventrally placed field H2; 2) field H2, formed by the lenticular fasciculus and arching over the dorsal border of the subthalamic nucleus, is composed largely of pallidothalamic fibres; 3) field H3 or prerubral field, is a large field of intermingling gray and white matter immediately rostral to the red nucleus, uniting fields H1 and H2 around the medial margin of the zona incerta; its gray matter forms the prerubral nucleus. See: lenticular loop. Synonym: campi foreli, tegmental fields of Forel. (05 Mar 2000) |
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| tegmental fields of Forel | Three circumscript, myelin-rich regions of the subthalamus known as H fields (from Haubenfelder); 1) field H1, corresponding to the thalamic fasciculus, a horizontal fibre stratum at the junction of the subthalamus and the overlying thalamus, is composed of pallidothalamic and cerebellothalamic fibres (brachium conjunctivum) and is separated by the zona incerta from the more ventrally placed field H2; 2) field H2, formed by the lenticular fasciculus and arching over the dorsal border of the subthalamic nucleus, is composed largely of pallidothalamic fibres; 3) field H3 or prerubral field, is a large field of intermingling gray and white matter immediately rostral to the red nucleus, uniting fields H1 and H2 around the medial margin of the zona incerta; its gray matter forms the prerubral nucleus. See: lenticular loop. Synonym: campi foreli, tegmental fields of Forel. (05 Mar 2000) |
| electromagnetic fields | Fields representing the joint interplay of electric and magnetic forces. (12 Dec 1998) |
| fields of Forel | Three circumscript, myelin-rich regions of the subthalamus known as H fields (from Haubenfelder); 1) field H1, corresponding to the thalamic fasciculus, a horizontal fibre stratum at the junction of the subthalamus and the overlying thalamus, is composed of pallidothalamic and cerebellothalamic fibres (brachium conjunctivum) and is separated by the zona incerta from the more ventrally placed field H2; 2) field H2, formed by the lenticular fasciculus and arching over the dorsal border of the subthalamic nucleus, is composed largely of pallidothalamic fibres; 3) field H3 or prerubral field, is a large field of intermingling gray and white matter immediately rostral to the red nucleus, uniting fields H1 and H2 around the medial margin of the zona incerta; its gray matter forms the prerubral nucleus. See: lenticular loop. Synonym: campi foreli, tegmental fields of Forel. (05 Mar 2000) |
| accumulating shear | A feller-buncher shearhead that is capable of accumulating and holding 2 or more cut stems. (05 Dec 1998) |
| shear | 1. To cut, clip, or sever anything from with shears or a like instrument; as, to shear sheep; to shear cloth. It is especially applied to the cutting of wool from sheep or their skins, and the nap from cloth. 2. To separate or sever with shears or a similar instrument; to cut off; to clip (something) from a surface; as, to shear a fleece. "Before the golden tresses . . . Were shorn away." (Shak) 3. To reap, as grain. 4. To deprive of property; to fleece. 5. <mechanics> To produce a change of shape in by a shear. See Shear. Origin: Sheared or Shore; Sheared or Shorn; Shearing] [OE. Sheren, scheren, to shear, cut, shave, AS. Sceran, scieran, scyran; akin to D. & G. Scheren, Icel. Skera, Dan. Skire, Gr. Cf. Jeer, Score, Shard, Share, Sheer to turn aside. 1. A pair of shears; now always used in the plural, but formerly also in the singular. See Shears. "On his head came razor none, nor shear." (Chaucer) "Short of the wool, and naked from the shear." (Dryden) 2. A shearing; used in designating the age of sheep. "After the second shearing, he is a two-sher ram; . . . at the expiration of another year, he is a three-shear ram; the name always taking its date from the time of shearing." (Youatt) 3. <engineering> An action, resulting from applied forces, which tends to cause two contiguous parts of a body to slide relatively to each other in a direction parallel to their plane of contact; also called shearing stress, and tangential stress. 4. <mechanics> A strain, or change of shape, of an elastic body, consisting of an extension in one direction, an equal compression in a perpendicular direction, with an unchanged magnitude in the third direction. Shear blade, one of the blades of shears or a shearing machine. Shear hulk. See Hulk. Shear steel, a steel suitable for shears, scythes, and other cutting instruments, prepared from fagots of blistered steel by repeated heating, rolling, and tilting, to increase its malleability and fineness of texture. Origin: AS. Sceara. See Shear. Source: Websters Dictionary (01 Mar 1998) |
| shear flow | A flow of a material in which parallel planes in the material are displaced in a direction parallel to each other. (05 Mar 2000) |
| shear rate | The change in velocity of parallel planes in a flowing fluid separated by unit distance; its units expressed in seconds-1. (05 Mar 2000) |
| shear stress | The force acting in shear flow expressed per unit area; units in the CGS system: dynes/cm2. (05 Mar 2000) |
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