blackout


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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 ?
Life has been derailed for the population of about 8 million people in the region due to an absolute blackout of all communication networks.
"These blackouts are catastrophic," said 51-year-old janitor Bernardina Guerra, who lives in Caracas.
He disclosed that the company had issued a statement to residents of the area through the electronic media in Warri on the cause of the blackout and efforts being made round the clock to restore electricity to Warri and environs.
People will be able to call their bluff easily with 'Urja Mitra', the latest app from the power ministry's stable to track blackouts in real-time.
That said, Smith & Wesson chambers its M&P15 AR-style rifle in .300 Whisper and states on its website that those guns can safely fire .300 AAC Blackout ammo as well as .300 Whisper ammo.
The protest is being organized to demands Indian Government to stop the indiscriminate killings of civilians and lift draconian media blackout of the region.
The government immediately placed a media blackout on all written and visual news.
"On behalf of more than 5 million consumers nationwide, I am pleased DISH and Sinclair have agreed to end one of the largest blackouts in history and extend their negotiations," said Wheeler in a statement.
In Blackout: Remembering the Things I Drank to Forget, Sarah Hepola reveals the ugly side of addiction with humor and honesty.
WHEN The Blackout announced they were breaking up in December last year, I was devastated.
The best way to keep your rooms as dark as possible is to cover your windows with blackout blinds or curtains.
The teams voted for a one-year suspension of the long-standing blackout policy for the preseason and regular season.