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

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 ?
Stands out for breaking new ground, rather than rehashing old approaches.
A previous needs assessment in rural Arkansas, for example, revealed the most significant problems encountered by persons with disabilities included economic limitations, unemployment and underemployment, restricted transportation, and healthcare shortages.[5] A survey by the Breaking New Ground Resource Center revealed that more than 30 percent of farmers and ranchers with SCI purchased and obtained service on their wheelchairs and other mobility aids more than 100 miles away from their homes.
Most of the remaining papers do not, at first sight, give the appearance of breaking new ground, but this is in part a reflection of the high level of activity in recent years.
Transaction costs on available investment vehicles are currently high, as often is the case when breaking new ground. So new, in fact, that the creative development of workable funding mechanisms can even involve the amendment of standing legislation in order to allow them.
Elected officials in the communities of White River and the Pic Mobert First Nation are breaking new ground that will provide a positive and useful case study for other neighbouring municipalities and First Nations.
Last year Leed started his own production and consulting company, Content Provider, with the goal of breaking new ground developing programming for the Internet generation.
In her presentation "Breaking New Ground: Building in Lower Manhattan," she gave an overview of the many aspects of the proposed project -- a 40- story, 570,000 SF structure at South Street Seaport on the East River.