نتایج جستجو برای: output of x lamps
تعداد نتایج: 21229256 فیلتر نتایج به سال:
The use of electromagnetic induction lamps without electrodes has increased because of their long life and energy efficiency. The control of the ignition and luminosity of the lamp is provided by an electronic ballast. Beyond that, the electronic ballast also provides a power factor correction, allowing the minimizing of the lamps impact on the quality of service of the electrical network. The ...
Ultraviolet (UV) fluorescent lamps are widely used in the manufacturing process of biomaterials. The possibility of replacing these lamps with ultraviolet light emitting diodes (UV-LEDs) was investigated and the results are presented here. A number of emission characteristics, including the spectral output and intensity of both light sources were measured and compared. The warm up time of the U...
iii EXECUTIVE SUMMARY This report describes a field study that was performed to provide better information about how warning lamps for emergency vehicles affect the vision and driving performance of surrounding drivers, with special emphasis on understanding any ways in which those lamps might have negative effects on safety. The situations of most concern for this study are those in which an e...
nitric oxide (no) is a small molecule synthesized by most of mammalian cells with diverse biological activities including vasodilatation, host defense and wound healing. impaired wound healing is a common occurrence among diabetics and patients receiving glucocorticoid therapy. on the other hand the application of laser in biomedical area have been increased. thus, the current studies were desi...
the present study is paid to the evaluation of the welfare program of the unemployment insurance in iran. the main purpose which was the main reason for performing this thesis, was the unemployment insurance plan’s challenges in iran such as financial problems of this plan, prolongation of the credit receipt for some insured people, unemployment slow exiting from the unemployment insurance fund...
Jaundice or hyperbilirubinemia is frequently observed in newborn infants. In most cases a Phototherapy tool is used for treatment. In this way light with wavelengths in the range of 420- 470 nanometers (nm) is used to convert bilirubin so that it can be excreted in the urine and feces. Since high levels of bilirubin can cause deafness and brain damage, it is very important to care it soon, so t...
Faulty LED lamps can cause a decrease in light efficiency, lead to flicker, and have negative impact on creating reliable, stable, healthy environment. However, many lamps’ faults are difficult detect by electrical parameter measurements or naked-eye observation. Consequently, this paper, novel fault diagnosis strategy is proposed analyzing output time-frequency characteristics of lamps. The co...
Introduction: In recent years, use of compact fluorescent lamps has increased in order to optimize energy consumption. The aim of this study was to evaluate the radiations of electromagnetic spectrum from usual compact fluorescent lamps. Methods: In this study, 48 compact fluorescent lamps from different brands and cover (warm – cool) were selected. For studied lamps, operational facto...
fuzzy logic has been developed over the past three decades into a widely applied techinque in classification and control engineering. today fuzzy logic control is one of the most important applications of fuzzy set theory and specially fuzzy logic. there are two general approachs for using of fuzzy control, software and hardware. integrated circuits as a solution for hardware realization are us...
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