hole model

hole model

(electronics)
A model of semiconductor behaviour in which donors contribute a positive charge equal in magnitude to the charge of an electron, and acceptors contribute space for such a charge within the crystal lattice. Honored by history well before electrons were discovered and described, much of electronics, especially at the engineering level, continues to consider current as flowing from positive to negative.
References in periodicals archive ?
This newer explanation, the so-called "direct collapse black hole model," suggests that very large gas clouds - of between 10,000 and 100,000 solar masses - collapsed directly to become the seeds of the black holes.
in accordance with the black hole model of the universe that is developed on the basis of this principle.
Not everyone buys the black hole model of a quark-gluon plasma.
The remaining competitor to a black hole model for the heavyweight centers of galaxies has been the superdense star cluster.
However, Russell Humphreys of Sandia National Laboratories formulated the White Hole Model in 1995 for the origin of the universe based on two entirely different assumptions: The universe has a center somewhere, and it has finite boundaries.
Woosley has championed the supernova-black hole model to explain gamma-ray bursts.
176 Hole Model (2005) RESOURCE Cutoff, CATEGORY %Cu Mt %Cu %Mo Au, g/t Measured & Indicated 0.
In accordance with the black hole model of the universe developed recently by [21-22], a black hole constructs an individual spacetime (spatially singular and temporally noncausal to the outside) and a spacetime encloses a black hole.
Some theorists suggested reviving the black hole model in the mid-1980s as improved ground-based, visible-light observations (though still lacking full resolution of the core) continued to indicate an intense spike of light coming from M15's center.
3 some open problems of the common black hole model are pointed out and their relationship with the corresponding historical findings is emphasized.
The second group comprises three principal model approaches: cell, lattice, and Simha-Somcynsky hole models.
Furthermore, tension has arisen between the observed characteristics of certain astrophysical phenomena and popular black hole models.