Results 1 to 10 of about 6,979,652 (302)
A novel fault diagnosis strategy for LED lamps via light output time-frequency characteristics analysis and machine learning [PDF]
Heliyon, 2023 Faulty LED lamps can cause a decrease in light efficiency, lead to flicker, and have a negative impact on creating a reliable, stable, and healthy light environment.
Yuhang Shang +4 more
doaj +2 more sources
Oral, 2023 Light-curing units (LCUs) are often subject to clinician-determined factors such as infection control barriers (ICBs) and different positionings of the light tip that may reduce their radiant exposure.
Jitte van der Zee +2 more
doaj +1 more source
Nanomaterials, 2022 This work proposes an InGaN/GaN multiple-quantum-well flip-chip blue ultrathin side-emitting (USE) light-emitting diode (LED) and describes the sidewall light emission characteristics for the application of backlight units in display technology.
Tae Kyoung Kim +4 more
doaj +1 more source
Evaluation of the Effect of Protective Sleeve on Output Intensity of Light Emitting Diode Light Cure Units [PDF]
Journal of Dental Materials and Techniques, 2016 Aim: The purpose of this study was to compare the difference in the output intensity of Light Emitting Diode (LED) light cure (LC) devices with and without a protective sleeve and its clinical significance. Materials and Methods: The output intensity of
Amit Jena +2 more
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Effects of nocturnal light on (clock) gene expression in peripheral organs: a role for the autonomic innervation of the liver. [PDF]
PLoS ONE, 2009 BACKGROUND:The biological clock, located in the hypothalamic suprachiasmatic nucleus (SCN), controls the daily rhythms in physiology and behavior.
Cathy Cailotto +7 more
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Perovskite quantum dots doped with neodymium ions: synthesis and optical properties
Физико-химические аспекты изучения кластеров, наноструктур и наноматериаловThe work presents a synthesis method, structural and optical characteristics as well as a comparative analysis of properties of colloidal quantum dots based on halide perovskites doped with Nd³⁺ ions with 20% substitution of lead ions.
A.M. Pshukov +3 more
doaj +1 more source
Monolithically Integrated Light Feedback Control Circuit for Blue/UV LED Smart Package
IEEE Photonics Journal, 2017 Given the performance decay of high-power light-emitting diode (LED) chips over time and package condition changes, having a reliable output light for sensitive applications is a point of concern.
Zahra Kolahdouz Esfahani +4 more
doaj +1 more source
IEEE Photonics Journal, 2013 A 3-D numerical model has been developed to investigate the transient thermal, electrical, and optical output performance of a single-chip light-emitting diode (LED) with an interdigitated mesa geometry under dc operation and a multimicrochip LED under ...
Farn-Shiun Hwu +5 more
doaj +1 more source
Ferroelectric Liquid Crystal Compound Lens Based on Pancharatnam–Berry Phase
Crystals, 2022 We report a ferroelectric liquid crystal (FLC) compound lens based on the Pancharatnam–Berry (PB) phase. The phase of the FLC compound lens is an integration of polarization grating and a PB lens. Thus, when light passes through an FLC compound lens, the
Ying Ma +5 more
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PLoS Biology, 2007 Animal circadian clocks are based on multiple oscillators whose interactions allow the daily control of complex behaviors. The Drosophila brain contains a circadian clock that controls rest-activity rhythms and relies upon different groups of PERIOD (PER)
Marie Picot +4 more
doaj +1 more source