ground

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ground

 [grownd]
1. a path of conduction from an electrical circuit to the earth.
2. to connect an electrical circuit or electrical equipment to the earth.
3. zero electrical potential.

ground

Etymology: AS, grund
1 (in electricity) a connection between the electric circuit and the ground, which becomes a part of the circuit.
2 (in psychology) the background of a visual field that can enhance or inhibit the ability of a patient to focus on an object.

ground

1. Basic substance or foundation.
2. Reduced to a powder; pulverized.
3. In electronics, the negative or earth pole that has zero electrical potential.

figure

A part or pattern in the visual field which has the perceptual attribute of completeness and is perceived as distinct from the rest of the field which forms the ground. Example: a printed word against a background page.
ambiguous figure An image or drawing arranged in such a way that its perception oscillates or flips involuntarily between, usually, two interpretations even though the retinal image remains constant, thus indicating that higher cortical processing are involved. Syn. reversible figure. See Blivet figure; Kanizsa figure; illusion; Necker cube; Rubin's vase; Schroeder's staircase.
Blivet figure An 'impossible' figure in which three apparently solid tubes are attached at one end of a rectangular base which projects only two bars (Fig. F4). See Necker cube; Schroeder's staircase; Rubin's vase.
fortification figure See scintillating scotoma.
Kanizsa figure An ambiguous figure in which the illusory contour of a square (or triangle) appears in the middle of four (or three) truncated solid squares (or circles). It is an illustration of the perceptual ability to make sense of an incomplete figure by creating a 'whole' image from the separate elements (Gestalt organization). Some people cannot perceive the contour. Syn. Kanizsa square (Fig. F5).reversible f. See ambiguous figure.
Fig. F4 Blivet figureenlarge picture
Fig. F4 Blivet figure
Fig. F5 Kanisza figureenlarge picture
Fig. F5 Kanisza figure
References in periodicals archive ?
The BellSouth Foundation adopted Gaining Ground as the theme for its strategic initiatives and corresponding grant programs in the field of education for 2001 - 2005.
com's Evan Powell, LCDs tend to deliver better color saturation and sharper images than DLPs, though the latter are gaining ground.
Given the sluggish condition of the luxury car market, it is encouraging to see that we are gaining ground in South Florida," said Lexus Area Manager Jim Melton.
B2C experience still trumps B2B, but B2B is gaining ground.
The practice is gaining ground in Orange County, where large-scale developments pose the same challenges as in Santa Clarita.
Long Beach State's 2-1 softball win Sunday prevented host Cal State Northridge from gaining ground on the Big West Conference-leading 49ers.
We currently have the only viable solution in the marketplace for cord-free two-way radio operation, and we're quickly gaining ground in the most demanding markets such as the U.
Voice-XML is gaining ground, early adopter firms are continuing to invest, and secondary or "pragmatist" verticals are showing increasing interest in speech.