That way they are unlikely to cause any form of interference, even in frayed wiring or unshielded navigation and communications gear.The picocell gathers calls from passengers and transmits them up to a communications satellite in orbit above.
Following the cobalt-60 theft in Mexico, an IAEA statement noted that, if unshielded, its gamma rays would probably kill people next to it in an hour or perhaps just minutes.In the event, five of the six people arrested for the theft on December 5th had avoided exposure and the sixth appeared unharmed.
An IAEA spokesman said it would "probably be fatal to be close to this amount of unshielded radioactive material for a period in the range of a few minutes to an hour".
Bright, unshielded floodlights — one of the most common types of outdoor security lighting in the country — often fail on both counts, as do all-night lights installed on isolated structures or on parts of buildings that can't be observed by passersby (such as back doors).
They were maintaining the discretion that is traditional in their business but has become increasingly quaint as fairs expose their persons and their pricing, unshielded by cagey assistants and velvet ropes.
And while a reactor core is isolated by thick layers of steel and concrete, a spent-fuel pool is largely unshielded.
People who decide to illuminate their trees at night, or to install unshielded floodlights on the corners of their garage, shining into a bedroom in a house next door, are making a decision for their neighbors as well as for themselves.
The rules prohibit unshielded exterior lamps and limit the lighting of trees and other vegetation, but, like all our regulations, they apply only to installations made after the date of the change, and they will be difficult to enforce.
Yet this catch was far more menacing: 57,000 pounds of spent nuclear fuel at the LaSalle nuclear plant here, stored for decades in a pool and, if unshielded, powerful enough to deliver a lethal dose of radiation within seconds.
Indeed, Spinning Boris, while ostensibly a film about the Russian presidential election, is actually about how in a globalised world, unshielded by Iron curtains, it should come as no surprise that Russia and the United States have a vested interest in one another's political elections and, to quote a Russian expression, dirty politics "has no nationality".
The videos are convincing, showing, via time-lapse photography, how gas flares and unshielded drill-site lights are compromising the park for astronomers.
