Background: Computer usage has rapidly grown. This is because it helps to resolve problems, i.e., encountered in daily life by individuals. Various monitor screens that have been developed affect the userchr('39')s eyes. Screen size is one of the relevant impacts. Thus, this study compared the immediate effects of two computer screen sizes on visual fatigue in Video Display Terminal (VDT) users...

Abstract The intensity fluctuation of atmospheric turbulence significantly affects the performance laser communication system. To suppress effect, we propose an avalanche photodiode (APD) optimal gain formula under channel, taking real-time received signal-to-noise ratio (SNR) as evaluation parameter channel’s state. Based on this formula, design a model optical signal receiver in utilizing Fuz...

The life of LED driver is mainly dependent on the component used in it. Elimination of electrolytic capacitor is done so that the life of LED driver will increase, if an ac-dc LED driver with power factor correction control is used than the output will be a pulsating current for driving the LED. Since the pulsating current will introduce light flicker that varies double the power line frequency...

1. We have measured responses of macaque retinal ganglion cells to a uniform flickering field, with variation in luminance, chromaticity or both (heterochromatic flicker). 2. With heterochromatic flicker, as the luminance ratio of the flicker components was varied, phasic ganglion cell activity went through a minimum and an abrupt phase change close to equal luminance. Tonic ganglion cell respo...

Abstract With the rapid development of wind power industry, total installed capacity has increased dramatically worldwide, and a large number installations need to be connected grid. In turbines, voltage flicker due output fluctuations caused by speed changes, application Voltage Source Converter (VSC) cause harmonic richness other quality problems become more prominent. this regard, research i...