Sentence examples for frequency and brightness from inspiring English sources
Project 3. Are PMC/NLC frequency and brightness trending due to changes in temperature and water vapor?
Simultaneous satellite measurements of mesospheric temperature and humidity and the NLC occurrence frequency and brightness estimates from ground-based observations give an opportunity to study the NLC sensitivity to temperature and humidity of the summer mesopause.
There is an intense ongoing effort on studies of long-term trends in occurrence frequency and brightness of mesospheric clouds, termed noctilucent clouds (NLCs) as observed from the ground and polar mesospheric clouds (PMCs) as observed from the space, in connection to global climate change and related changes of upper atmosphere environment, in particular (Thomas 2003).
There is also an anticorrelation of PMC occurrence frequency and brightness with solar activity, which is to be expected since the clouds are composed of H2O ice.
Are the frequency of appearance and brightness trends of polar mesospheric clouds (PMCs) and noctilucent clouds (NLCs) due to changes in temperature and water vapor?
The prevailing Feature Integration Theory by Anne Treisman [5] states that perception picks up objects in a two-step process where a first, fast, unattended, automatic, and parallel process codes a number of separable dimensions of the visual scene such as color, orientation, spatial frequency, brightness and direction of movement.
The occurrence of noctilucent clouds appears to be increasing in frequency, brightness and extent.
We then used 24 powerful searchlights to create dynamic formations in the sky, linking light brightness and movement to the frequency and amplitude of the recordings.
On their basis, the motion signals of LPTCs were shown to depend not only on stimulus velocity and motion direction, but also on the brightness contrast, the spatial frequency and other properties of the stimulus pattern (Dvorak et al., 1980; Hausen, 1981; Egelhaaf and Borst, 1989; Egelhaaf et al., 1989; Hausen and Egelhaaf, 1989).
Splat takes the data from the sound-level meter and arranges it on a spectrogram: a blue field of time on which sounds appear as orange shapes, their height representing their frequency, their brightness showing loudness, their length duration.
