blackout

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Related to Blackouts: passing out

blackout

1. a momentary loss of consciousness, vision, or memory
2. a temporary electrical power failure or cut
3. Electronics a temporary loss of sensitivity in a valve following a short strong pulse
4. a temporary loss of radio communications between a spacecraft and earth, esp on re-entry into the earth's atmosphere

blackout

[′blak‚au̇t]
(communications)
(electricity)
The shutting off of power in an electrical power transmission system, either deliberately or through failure of the system.

blackout

blackoutclick for a larger image
The relationship between acceleration and time at maximum G required to produce symptoms of grayout and blackout.
i. A condition of temporary loss of vision, possibly also loss of consciousness, resulting from the effect of high and sustained positive acceleration (g) on the body. A condition that occurs at g value higher than 1 that causes gray-out. Normally, this occurs when the body is exposed to +4 and +4.5 g for about 10 seconds or more. This can be postponed slightly by using a g-suit, by crouching, or by using a reclining seat. The onset of gray-out and blackout conditions varies from individual to individual. It is also dependent on physical conditioning.
ii. The fadeout of radio communications caused by changes in the ionosphere resulting from a nuclear explosion or ionospheric disturbances.
iii. An enforced period during which all lights in an area are turned off or concealed, so as not to be visible from the air. It is one of the passive air defense measures.

blackout

A complete loss of power. See brownout.
References in periodicals archive ?
The government decided to impose a media blackout on the same day.
This decision to suspend the blackout policy for the upcoming NFL season is a victory for the millions of sports fans and consumers across the country,'' said Sen.
We'd really appreciate if no blackouts occurred in winter," they said.
Amory and Hunter Lovins worried " a few people could probably blackout most of the country.
com/joe_sheehan/status/253161676529094656) that I had "been out front on blackout issues for years" but I was no more persistent than Jeff Passan of Yahoo
Even if rolling blackouts are implemented, the government plans to exclude major medical institutions such as emergency medical care centers, prefectural government offices, and police and fire department head offices from the list subject to the power loss.
Though most of New York City was dark for only about a day, August 14 to 15, the blackout affected a wide swathe of the north-eastern United States and Canada, lasting as long as four days in some cases -- including some pockets within the city.
Researchers identified a trend among blackout sufferers to ask people who had also been drinking for information about what happened and how they behaved, instead of possibly getting a more accurate account from a non-drinker.
Treatment of blackouts must begin with awareness of the stigma attached to them.
It is an important question because rapists now are claiming blackouts as a defense.
EDS: UPDATING POSSIBLE CAUSE OF BLACKOUT IN BOTTOM 3 GRAFS)
Blackouts triggered by cardiovascular irregularities, when blood supply to the head is interrupted, can appear similar to epileptic seizures and are often mis-diagnosed.