Results 31 to 40 of about 4,205,989 (306)

Effects of Microwave and Light Emitting Diode as Disinfection Methods on the Dimensional Stability of Polymethyl Methacrylate and Polyamide Denture Base Resin

open access: yesJournal of Islamic International Medical College, 2022
Objective: To compare the effects of microwave and light emitting diode disinfection on the dimensional stability of two denture base materials; polymethyl methacrylate and polyamide.
Hina rehman   +7 more
doaj  

Machine vision based in-process light-emitting diode chip mounting system

open access: yesMeasurement + Control, 2018
Background: In this study, a machine vision–based method was developed for automated in-process light-emitting diode chip mounting lines with position uncertainty.
Chao-Ching Ho, You-Min Chen, Po-Chieh Li
doaj   +1 more source

Recent advances in light outcoupling from white organic light-emitting diodes [PDF]

open access: yes, 2015
M.C.G. is grateful to the Scottish Funding Council (via SUPA) for financial support.Organic light-emitting diodes (OLEDs) have been successfully introduced to the smartphone display market and have geared up to become contenders for applications in ...
Gather, M.C.   +2 more
core   +1 more source

A Wiener process–based remaining life prediction method for light-emitting diode driving power in rail vehicle carriage

open access: yesAdvances in Mechanical Engineering, 2019
Remaining life prediction is an effective way to optimize maintenance strategy and improve service life for light-emitting diode driving power in rail vehicle carriage.
Zhi Gao   +4 more
doaj   +1 more source

Nonlinear Quantum Dot Light Emitting Diode Dynamics and Synchronization with Optoelectronic Feedback

open access: yesمجلة علوم ذي قار, 2023
We studies a three-variable dimensionless model for a quantum dot light emitting diode (QD-LED) subject to optoelectronic feedback (OEFB). In dependence of the feedback strength and delay-time we analyze complex bifurcation scenarios for the intensity ...
Methag Abdalwahed Kadim   +9 more
doaj   +1 more source

Bidirectional light-emitting diode as a visible light source driven by alternating current

open access: yesNature Communications, 2023
Gallium nitride-based light-emitting diodes have revolutionized the lighting market by becoming the most energy-efficient light sources. However, the power grid, in example electricity delivery system, is built based on alternating current, which raises ...
Mikołaj Żak   +10 more
doaj   +1 more source

Photothermal detection of trace optical absorption in water by use of visible-light-emitting diodes [PDF]

open access: yes, 1998
Visible light emitting diodes of three different colors have been used to detect an absorbing compound (potassiumpermanganate) in trace quantities in aqueous solution.
Johnson, Mark   +5 more
core   +1 more source

Doping concentration effect on performance of single QW double-heterostructure InGaN/AlGaN light emitting diode

open access: yesEPJ Web of Conferences, 2017
Light emitting diode (LED) employed a numerous applications such as displaying information, communication, sensing, illumination and lighting. In this paper, InGaN/AlGaN based on one quantum well (1QW) light emitting diode (LED) is modeled and studied ...
Abdul Halim N. Syafira   +4 more
doaj   +1 more source

Comparisons among the diagnostic methods used for the detection of extra-pulmonary tuberculosis in Bangladesh

open access: yesInternational Journal of Mycobacteriology, 2012
The present study was an attempt to establish a suitable method for the effective diagnosis of extra-pulmonary tuberculosis in Bangladesh. In this regard, detection of Mycobacterium tuberculosis from 390 different extra-pulmonary specimens was performed ...
Saurab Kishore Munshi   +3 more
doaj   +1 more source

Standardization of phototherapy for neonatal hyperbilirubinemia using multiple-wavelength irradiance integration

open access: yesPediatrics and Neonatology, 2020
Background: Phototherapy with radiation of 460–490 nm wavelengths provides the most potent therapeutic effect for neonatal jaundice. However, the efficacy of phototherapy has been estimated using single-wavelength detectors with sensitivity at ...
Shin Kato   +8 more
doaj   +1 more source

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