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Orthogonal experiment design and variance analysis were adopted to investigate a miniature cascade thermoacoustic engine, which consisted of one standing wave stage and one traveling wave stage in series, operating at about 470 Hz, using helium as the working gas.
The optimum ratio of the heater powers between the traveling wave stage and the standing wave stage was about 1.25, compromising the total efficiency with the dynamic pressure amplitude.
The total efficiency and the dynamic pressure amplitude increased when the traveling wave stage heater power increased.
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As well, the individual EEG characteristics of the evolution of this transition mimicked components of REM/nREM transitions through lighter and deeper slow wave stages in natural sleep.
14 As sleep ensues, its slow wave stages and SCN suppression reduce cortisol to a healthy daily nadir as SCN orchestrate a nightly surge of melatonin and other sleep-related hormones.
Nightmares are different from night terrors, which typically occur in the first, slow-wave stage of sleep, and which tend to be plotless flashes of panic.
Then a 2012 study by a US group reported that participants were more likely to correctly play a melody in a musical video game (similar to Guitar Hero) if the tune had been previously played to them during the slow-wave stage of a 90-minute nap.
"Poetry needs to get back in touch with the human desire to kick the person in front of you in line," he said, adding that as you get older, "you make peace with your deeper meanness and get into the heavy cane-waving stage of your life".
A miniature cascade thermoacoustic engine, which consisted of one standing-wave stage and one traveling-wave stage in series, was built and tested, which length was about 1.2 m, operating at 470 Hz using helium as working gas.
The Above the Waves stage would flank an adjacent pool, prime real estate for early afternoon relaxation, while Electric City, the main stage, became ground zero for Bisco's most severe madness.
They spent less time in both the light phase of sleep known as Stage 2 and the deep, slow-wave Stages 3 and 4. All of which meant that they experienced less sleep over all and took longer to drift off.
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