Results 201 to 210 of about 4,066,800 (255)

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

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Visible Light and the Skin

Photochemistry and Photobiology, 2022
AbstractVisible light (VL, 400–700 nm) was previously regarded as nonsignificant with minimal to no photobiologic effects on the skin. Recent studies have demonstrated that in dark‐skinned individuals (skin phototypes IV–VI), VL can induce more intense and longer lasting pigmentation compared to ultraviolet A1 (UVA1, 340–400 nm).
Nneamaka Ezekwe, Jalal Maghfour, Indermeet Kohli   +2 more
openaire   +2 more sources

Visible lights and visible light-activated composite resins

The Journal of Prosthetic Dentistry, 1983
U ltraviolet light (W)-activated composite resins serve a useful purpose.‘,* The depth of cure provided by the various UV systems has contributed to their acceptance.3 Recently, the visible light-activated composite resins have gained in popularity. At the start of this investigation, there were 11 visible light-activated composite resins and eight ...
S M, Newman, G A, Murray, J L, Yates
openaire   +2 more sources

Visible light. Part I: Properties and cutaneous effects of visible light

Journal of the American Academy of Dermatology, 2021
Approximately 50% of the sunlight reaching the Earth's surface is visible light (400-700 nm). Other sources of visible light include lasers, light-emitting diodes, and flash lamps. Photons from visible light are absorbed by photoreceptive chromophores (e.g., melanin, heme, and opsins), altering skin function by activating and imparting energy to ...
Evan, Austin, Amaris N, Geisler, Julie, Nguyen, Indermeet, Kohli, Iltefat, Hamzavi, Henry W, Lim, Jared, Jagdeo   +6 more
openaire   +2 more sources

Visible Light Communication

Optical Fiber Communication Conference, 2015
▸ VLC physical layer techniques have advanced significantly during last decade. ▸ We have seen tremendous improvements in data rates, range and coverage. ▸ Novel devices such as SPADs and micro LEDs can improve VLC systems considerably. ▸ VLC is not just a point-to-point communication technology.
openaire   +1 more source

A SNR analysis of the visible light channel environment for visible light communication

2012 18th Asia-Pacific Conference on Communications (APCC), 2012
In this paper, we provide Signal-to-Noise Ratio (SNR) analysis of visible light channel environment reflecting practical conditions for the usage of Visible Light Communication (VLC) in Intelligent Transportation System (ITS). Considering practical LED lights (Headlamp and Streetlamp), we perform 3D computer simulations in two ITS scenario.
SeokJu Lee, Sung-Yoon Jung
openaire   +2 more sources

Imaging visible light with Medipix2

Review of Scientific Instruments, 2010
A need exists for high-speed single-photon counting optical imaging detectors. Single-photon counting high-speed detection of x rays is possible by using Medipix2 with pixelated silicon photodiodes. In this article, we report on a device that exploits the Medipix2 chip for optical imaging.
Aaron, Mac Raighne, Colin, Brownlee, Ulrike, Gebert, Dzmitry, Maneuski, James, Milnes, Val, O'Shea, Tilman K, Rügheimer   +6 more
openaire   +2 more sources

Precoded visible light communications

2013 9th International Conference on Information, Communications & Signal Processing, 2013
Multiple input multiple output (MIMO) technology appears attractive for indoor visible light communication (VLC) systems as multiple light-emitting diodes (LED) sources are typically deployed for indoor environment. Most of current indoor MIMO VLC systems utilize single user terminal scenario to investigate the performance of the system.
Jian Chen 0026, Yang Hong 0008, Zixiong Wang, Changyuan Yu   +3 more
openaire   +1 more source