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 1625-2 model has advanced features, including automatic frequency control (AFC), which identifies existing interference and chooses a measurement frequency to provide more accurate values; R measurement, which calculates earth ground impedance with 55 Hz to more accurately reflect the resistance that a fault-to-earth ground would experience; adjustable limits for quicker testing; and battery level status on the display.
Note that there is not just one earth ground connected to the system.
For more information about the Fluke 1623-2 and 1625-2 Earth Ground Testers, visit: www.
Contract awarded for Geumgang Earth ground Iksan 1 tool Osan 5 reorder, Ltd.
Former Town striker Michael Midwood featured for Ealandians as they beat Gildersome Spurs 4-3 in the other semi at Huddersfield Amateur's Old Earth ground.
THIS MEANS THAT GETTING A GOOD EARTH GROUND IN THE DESERT REQUIRES EXTRA TIME AND EFFORT.
When equipped with the TPS2PBND Power Bundle option including the P5120 passive high voltage probe, the TPS2000 models are capable of measuring up to 1000 Vrms CAT II from the probe tip to earth ground and measurements can be made on all channels simultaneously on voltages which are floating up to 600 Vrms CAT II (300Vrms CAT III).
Contract notice: Construction of two mixed double-ended type of ro-ro ships to liaise between the small and the great earth ground.