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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Medical Dictionary, © 2009 Farlex and Partners

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
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Due to the occurrence of an asymmetric ground fault in the distribution network, the sub-microgrid's current output will change, which can lead to its DC bus current change.
Patel, "Classification and location of single line to ground faults in double circuit transmission lines using artificial neural networks," International Journal of Power and Energy Conversion, vol.2, no.2, pp.
The ESP gauge is immune to ground faults, a persistent problem with this type of artificial lift which affects more than 15 per cent of downhole monitoring systems.
Result comparison for single line to ground fault (faulty phase) Relay recording R.M.S.
"If we had a ground fault on a transmission line, the older protection was not sensitive to detect the fault," said Elliott.
The Sentinel monitoring option offers alarms that indicate a ground fault or overload condition and identifies which circuit is a fault via a display on the front enunciator panel.
Included accessories are a timer for automatic control, a ground fault interrupter for electrical safety, a 3' hose for the oil outlet, and a handle for portability.
* Are all electrical outlets within six feet of a sink or other plumbing on a ground fault interruptor (GFI) circuit?
The pushbutton control panel has built-in ground fault protection.
Another safety measure would be to only plug these lamps into GFI (ground fault interrupter) outlets that are connected to light switches.
When an unwanted connection between system conductors and ground occurs, this is known as a ground fault.

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