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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 ?
Feeder Protection Relays protect feeder circuits from overcurrent, ground faults, phase loss or other detrimental conditions.
Ninety percent of all ground faults occur slowly due to dust buildup, moisture ingress, vibration, cable chaffing, or chemical and corrosive vapors, which lead to earth-leakage or residual-current ground faults that escalate to high current levels.
Basically, the faults that occur in a network feeder are single line to ground fault with resistance [R.
The Ground Fault Immune gauge runs a unique new power and communication system so that insulation break down caused by ground faults will not short the system.
And with an open NRG it is impossible to detect a ground fault with current transformers--a serious safety concern.
The comparison of the two phase to ground fault record form the relay and CAPE simulation are shown in numerical values in Table 3 and in graphical representation in figure 3.
Chapters cover generator normal operations, generator short circuit calculations, generator differential relay, backup fault protection, generator ground fault protection, unbalanced current protection, motoring protection, field winding protection, overexcitation, abnormal frequency protection, minimum excitation limiter, loss of synchronism, loss of field protection, synchronization protection, accidental energization protection, and motor protection.
3 CHRISTOF MIGONE, CHRISTOF MIGONE--SOUND VOICE PERFORM (ERRANT BODIES PRESS WITH GROUND FAULT RECORDINGS) A splendid survey of audio work by this Canadian artist.
If not, we may have a mild ground fault that may not seem like a big deal, but within 2 or 3 seconds it becomes a 12 kV phase-to-phase fault not far from our bus, which can cause equipment damage.
Safety features include ground fault protection, component fuses and a safety switch for UV lamps.
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.

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