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The Hue system was released in October 2012 on Apple Store, [3] and was marketed as the first iOS-controlled lighting appliance. [6] Products released before 2019 use the Zigbee Light Link protocol, a compatible subset of Zigbee 3.0, to communicate, while lighting products released later use either Bluetooth or Zigbee 3.0. Smart switches ...
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [ 1 ] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves .
An occulting light is a rhythmic light in which the duration of light in each period is longer than the total duration of darkness. In other words, it is the opposite to a flashing light where the total duration of darkness is longer than the duration of light. It has the appearance of flashing off, rather than flashing on.
The shape properties of the light waveform (e.g. sinusoidal, rectangular pulse and its duty cycle); see Figure 1; The average light level of the light source and its contrast with the background light level within the environment; The viewing angle and changes in direction of view by the observer; Physiological factors such as age and fatigue.
A white light source can be created by the combination of red, blue, and green light. Abney demonstrated that the cause of the apparent change in hue was the red and green light that comprised this light source, and that the blue light component had no contribution to the Abney effect. [3]
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A randomized control trial found that bevacizumab and ranibizumab had similar efficacy, and reported no significant increase in adverse events with bevacizumab. [79] A 2014 Cochrane review found that the systemic safety of bevacizumab and ranibizumab are similar when used to treat neovascular AMD, except for gastrointestinal disorders. [ 80 ]
Internally triggered Strobotrons (light-output optimized thyratrons) were available [9] as well as flood-beam-CRT-type, grid-controlled Vacuum stroboscopic light sources with fast phosphors. [10] The strobe light was popularized on the club scene during the 1960s when it was used to reproduce and enhance the effects of LSD trips. Ken Kesey used ...