pulses of 20 cycles per second as stimulation. The stimulus voltage was increased from zero at a constant rate of 80mV per second to determine the threshold S1 for the appearance of flicker, and then the threshold S2 for the disappearance was determined by lowering the voltage from a sufficiently high level at the same rate as above. The difference of the thresholds S1-S2 at rest was chosen as ...

Industrial Static Var Generator (SVG) is typically applied at or near the load center to mitigate voltage fluctuation, flicker, phase unbalance, non-sine distortion or other load-related disturbance. Special attention is paid to the influence of grid voltage quality on SVG current, the non-sine distortion and unbalance of grid voltage causes not only the AC current distortion and unbalance but ...

The VIIRS day/night band (DNB) high gain stage (HGS) pixel effective dwell time is in the range of 2–3 milliseconds (ms), which about one third flicker cycle present lighting powered by alternating current. Thus, if present, it induces random fluctuations nightly DNB radiances. This results increased variance temporal profiles. A survey characteristics conducted with high-speed camera data coll...

Arc furnaces can be classified as electricity receivers, which largely affect the quality of in power system. Voltage fluctuations are main disturbance generated by arc furnaces. The effects voltage include phenomenon flickering light. Apart from fluctuations, devices, to a lesser extent, source current and asymmetry, curve distortion, dips. purpose theoretical considerations is assess article ...

A technique that relies on integer wavelets to deliver energy to pixels and display gray shades in rms responding matrix displays is proposed. A large number of gray shades can be displayed without flicker using simple addressing waveforms with a few voltage levels.

Electric power quality problem has become an important problem in modern society, which effects industrial production and product quality, etc. So, we urgently need monitor and analyze electric power parameter to solve electric power quality problem. In this paper, we design a kind of electric power parameter detection system based on visual instrument (VI) technology, etc. System uses voltage/...

Electric arc furnace (EAF) is one of the most disturbing loads in power system as it highly time-varying and nonlinear. In this paper, new models based on instantaneous EAF voltage current, recorded from EAFs Mobarakeh steel company Isfahan/Iran are proposed. The focus paper developing efficient Schwarz model where three modified types original has four constant parameters. Unlike which uses in...

in order to identify the effects of vitamin a and aspirin on reducing uv lightinduced retinopathy, erg waves were compared before and after uv light exposure in rabbits. 30 rabbits were divided into 3 groups: the first group received vitamin a, 50,000 units i.m., single dose, the second group received aspirin, 50 mg/ kg/day po and the third group did not receive any medication. all three groups...