Results 1 to 10 of about 29,613 (204)
Sensors, 2022 A new technique to reduce flicker noise generated in light-fidelity (Li-Fi) transmission links based on the white light-emitting diode (LED) is proposed. Here, flicker noise with a frequency of 120 Hz, which is twice the frequency of AC power (60 Hz), is
Yong-Yuk Won, Jeungmo Kang
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The VIIRS Day/Night Band: A Flicker Meter in Space?
Remote Sensing, 2022 The VIIRS day/night band (DNB) high gain stage (HGS) pixel effective dwell time is in the range of 2–3 milliseconds (ms), which is about one third of the flicker cycle present in lighting powered by alternating current.
Christopher D Elvidge +2 more
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A Proposal for Flicker Evaluation
Eletrônica de Potência, 2014 The measured flicker levels by using the IEC standard 61000-4-15 often far exceed the established compatibility levels, even without the existence of consumer complaints.
Arnaldo José Pereira Rosentino Junior +2 more
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Voltage Fluctuations and Flicker in Prosumer PV Installation
Energies, 2022 In this paper, we present problems connected with voltage fluctuations in low-voltage networks caused by small PV sources installed in an LV network. For the purpose of analysis, high-resolution data gathered at the output of real PV sources for 4 months
Krzysztof Łowczowski, Zbigniew Nadolny
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Light Emitting Diode Lighting Flicker, its Impact on Health and the Need to Minimise it [PDF]
Journal of Clinical and Diagnostic Research, 2019 The existing technologies in Light Emitting Diode (LED) lighting sometimes cause flicker at frequencies that may have adverse health effects. Although, not always obvious to the human eye, it can make a difference in certain circumstances.
Sunil Batra +2 more
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Analysis of supply parameters of single- and double-string LED lamps with integrated AC direct capacitorless drivers [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2020 Thanks to a very high luminous efficacy of LED lamps (over 160 lm/W) they are the most preferred light sources in lighting applications today. The useful lifetime of LED modules exceeds 50,000 hours. Chromatic parameters of lamps making use of SSL (Solid
J. Chęciński, Z. Filus
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In the flicker of an eye [PDF]
The Journal of Physiology, 2008 Dreams were tentatively associated with twitching of the eyelids and somatic muscles during sleep in 1868 by Griesinger (Finger, 1994). However, it was not until 1953 that Aserinsky & Kleitman (1953) identified a discrete sleep stage they termed rapid eye movement (REM) sleep characterized by recurrent episodes of non-respiratory muscle atonia and ...
N P, Pedersen +3 more
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AJOG Global Reports, 2023 BACKGROUND: Opioids are routinely prescribed to patients postoperatively after cesarean delivery. With rates of cesarean deliveries increasing globally and the opioid epidemic continuing to have deleterious effects, finding methods to achieve effective ...
Ememobong O. Ubom, MD +6 more
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Identification of the flicker source in the power supply systems
Известия высших учебных заведений: Проблемы энергетики, 2022 THE PURPOSE. To consider issues related to the study of methods for determining the sources of violations of the quality of electrical energy in power supply systems, in particular consumers which create rapid voltage changes or voltage fluctuations that
V. I. Biryulin +2 more
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Energies, 2020 The present study analyzed light emitting diodes (LEDs) as an output load and used a Taylor series to describe the characteristic curve based on the exponential characteristic of voltage and current. A prototype circuit of a flyback LED driver system was
Ming-Chang Tsou, Ming-Tse Kuo
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