Results 31 to 40 of about 53,760 (259)

Full-model wavenumber inversion: An emphasis on the appropriate wavenumber continuation

, 2016
A model of the earth can be described using a Fourier basis represented by its wavenumber content. In full-waveform inversion (FWI), the wavenumber description of the model is natural because our Born-approximation-based velocity updates are made up of ...
Alkhalifah, Tariq Ali
core   +1 more source

Natural Bone‐Derived Ceramic Scaffolds Functionalized with Chitosan‐Gold, Chitosan‐Magnesium, and Chitosan‐Zinc for Enhanced Antibacterial Activity

Advanced Engineering Materials, EarlyView.
This study reports the development of antibacterial ceramic scaffolds derived from natural bovine bone. The bones were processed through sequential boiling and hydrogen peroxide treatment to remove organic matter, producing porous, mineral‐rich scaffolds.
Mohamad Hassan Taherian, Anh Thi Le, Anh Thi Van Le, Dung My Thi Dang, Tin Chanh Duc Doan, Chien Mau Dang, Martin Bolduc   +6 more
wiley   +1 more source

Absorption Wavebands for Discriminating Oxidation Time of Engine Oil as Detected by FT-IR Spectroscopy

Lubricants, 2019
Fourier Transform-Infrared (FT-IR) spectroscopy was used to analyze gasoline engine oil (SAE 5W20) samples that were exposed to seven different oxidation times (0 h, 24 h, 48 h, 72 h, 96 h, 120 h, and 144 h) to determine the best wavenumbers and ...
Ali Mazin Abdul-Munaim, Torrey Holland, Poopalasingam Sivakumar, Dennis G. Watson   +3 more
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Fractional-order Local Wavenumber - An Improved Source-parameter Estimator

, 2015
We present an improved local wavenumber method, based on the fractional-order differentiation of potential fields. Such kind of differentiation allows a fractional-order local wavenumber to be defined, whose usefulness is two-fold: a) the positions of ...
M. Fedi, Fedi, M., Abbas, Mahmoud Ahmed, M.A. Abbas   +3 more
core   +1 more source

Accurate wavenumber and intensity calibration for standardization of Raman spectroscopy

, 2020
Accurate wavenumber and intensity calibration are requisite for the standardization of spectroscopic techniques. Infrared spectroscopy ensures high wavenumber accuracy due to Fourier-transform spectrometers and accurate intensity scale in the unit of ...
Witek, Henryk A., Hamaguchi, Hiro-O, Raj, Ankit   +2 more
core   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

The wavenumber–frequency content of resonantly excited equatorial waves [PDF]

, 2012
Author Posting. © American Meteorological Society, 2012. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 42 (
Durland, Theodore S., Farrar, J. Thomas
core   +1 more source

Study of Love Waves in a Heterogeneous Viscoporoelastic Layer Overlying a Viscoporoelastic Half-space

International Journal of Applied Mechanics and Engineering
This research examines to study the Love-type surface waves move through a heterogeneous layer of viscoporoelastic material that rests on a viscoporoelastic half-space.
Radhika Nagapuri, Rajitha Gurijala, Archana Reddy R, Malla Reddy Perati   +3 more
doaj   +1 more source

Lamb Wave Local Wavenumber Approach for Characterizing Flat Bottom Defects in an Isotropic Thin Plate

Applied Sciences, 2018
This paper aims to use the Lamb wave local wavenumber approach to characterize flat bottom defects (including circular flat bottom holes and a rectangular groove) in an isotropic thin plate.
Guopeng Fan, Haiyan Zhang, Hui Zhang, Wenfa Zhu, Xiaodong Chai   +4 more
doaj   +1 more source