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The Atlantic reviewed "Past Tense" of Star Trek: Deep Space Nine in 2017, suggesting it was the "most political episode" of all Star Trek. [2] They note that in the two-part episode, Benjamin Sisko travels back in time to early 21st-century Earth aboard the USS Defiant spacecraft. They show this is used as a plot device to explore America's ...
Pages in category "Unidentified sounds" The following 11 pages are in this category, out of 11 total. ... This page was last edited on 28 February 2024, ...
Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
Music can reduce sympathetic nervous system activity, decreasing blood pressure and heart rate. [17] The decrease in systolic blood pressure, diastolic blood pressure, and heart rate signal a state of calmness, which is essential for having a good night sleep.
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3D audio effects are a group of sound effects that manipulate the sound produced by stereo speakers, surround-sound speakers, speaker-arrays, or headphones. This frequently involves the virtual placement of sound sources anywhere in three-dimensional space, including behind, above or below the listener.
Motor skills, cognitive skills, and mood were assessed in terms of: partial sleep derivation (also known as sleep deprivation), which is defined as fewer than 5 hours of sleep in a 24-hour period for 1 or more days; short-term total sleep deprivation (no sleep attained for fewer than 45 hours); and long-term sleep deprivation (no sleep attained ...
Sleeping in space requires that astronauts sleep in a crew cabin, a small room about the size of a shower stall. They lie in a sleeping bag which is strapped to the wall. [ 5 ] Astronauts have reported having nightmares and dreams, and snoring while sleeping in space.