Results 81 to 90 of about 109,078 (298)
Megahertz Schlieren Imaging of Shock Structure and Sound Waves in Under-Expanded, Impinging Jets [PDF]
, 2010 The accompanying fluid dynamics videos visualize the temporal evolution of shock structures and sound waves in and around an under-expanded jet that is impinging on a rigid surface at varying pressure ratios.
Mitchell, Daniel +2 more
core +1 more source
Effectiveness of Second-generation Light-emitting Diode (LED) Light Curing Units
The Journal of Contemporary Dental Practice, 2007 Abstract Aim The purpose of this study was to evaluate the effectiveness of three commercially available light emitting diode (LED) light curing units (LCU) (Elipar FreeLight - 3M ESPE; UltraLume LED2 - Ultradent; and Single V - BioArt) for polymerizing Z250-A3 composite (3M ESPE) using Knoop hardness, polymerization depth, and flexural strength ...
Ulisses Bastos, Campregher +5 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.A reproducible synthesis to control 3D/0D phase ratios via water‐tuned solvent–antisolvent methods is presented. Enhanced scintillation yield and ultrafast decay are achieved. Defect‐driven emission mechanisms are revealed through cathodoluminescence and radioluminescence, shedding light on the underexplored role of the 0D Cs4PbBr6 and mixed 0D/3D ...
Mario Calora +18 more
wiley +1 more source
Curing efficiency of three light emitting diode units at different curing profiles
Indian Journal of Dental Research, 2016 Context: High-intensity light emitting diode lamps with reduced exposure time to bond orthodontic attachments have been introduced to save the valuable clinical time. Aims: To evaluate the shear bond strength of brackets cured using three different light
Priyanka Verma
doaj +1 more source
Light-emitting diode street lights reduce last-ditch evasive manoeuvres by moths to bat echolocation calls [PDF]
Royal Society Open Science, 2015 The light-emitting diode (LED) street light market is expanding globally, and it is important to understand how LED lights affect wildlife populations. We compared evasive flight responses of moths to bat echolocation calls experimentally under LED-lit ...
Andrew Wakefield +3 more
doaj +1 more source
INFLUENCE OF LIGHT EMITTING DIODE (LED) ON MICROALGAE
Journal of Chemical Engineering and Industrial Biotechnology, 2020 There are 150,000 microalgae species. Scientists identified and classified 30,000 species. Only 10–15 species are utilised and studied for wastewater treatment, biogas upgrading, biomass production, and lipid content. LED can raise microalgae performance to the highest.
Sajjad Al-amshawee +1 more
openaire +2 more sources
MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance
Advanced Functional Materials, EarlyView.Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley +1 more source
III-Nitride Multi-Quantum-Well Light Emitting Structures with Selective Carrier Injection
Applied Sciences, 2019 Incorporation into the multi-layered active region of a semiconductor light-emitting structure specially designed intermediate carrier blocking layers (IBLs) allows efficient control over the carrier injection distribution across the structure’s ...
Hussein S. El-Ghoroury +2 more
doaj +1 more source
The photoluminescence spectra of phosphors for white led [PDF]
, 2016 Silicate-based converter phosphors have become a research focus for white-light-emitting diode(LED), due to their rich source of raw materials, convenient preparation techniques and high stability of thecrystal structure.This paper reports on the results
Мархабаева, А. А. +2 more
core
Tailoring the Properties of Functional Materials With N‐Oxides
Advanced Functional Materials, EarlyView.The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich +5 more
wiley +1 more source