Results 91 to 100 of about 1,265,505 (345)

Acoustic impedance prediction based on extended seismic attributes using multilayer perceptron, random forest, and extra tree regressor algorithms

Journal of Petroleum Exploration and Production Technology
Acoustic impedance is the product of the density of a material and the speed at which an acoustic wave travels through it. Understanding this relationship is essential because low acoustic impedance values are closely associated with high porosity ...
Lutfi Mulyadi Surachman, Abdulazeez Abdulraheem, Abdullatif Al-Shuhail, Sanlinn I. Kaka   +3 more
doaj   +1 more source

Application of Swept-Sine Excitation for Acoustic Impedance Education [PDF]

The NASA Langley Normal Incidence Tube (NIT) and Grazing Flow Impedance Tube (GFIT) are regularly employed to characterize the frequency response of acoustic liners through the eduction of their specific acoustic impedance.
Howerton, Brian M., Jones, Michael G., Vold, Havard   +2 more
core   +1 more source

Discovery of the Acoustic Faraday Effect in Superfluid 3He-B

, 1999
We report the discovery of the acoustic Faraday effect in superfluid 3He-B. The observation of this effect provides the first direct evidence for propagating transverse acoustic waves in liquid 3He, a mode first predicted by Landau in 1957.
AJ Leggett, BS Shivaram, D Vollhardt, EG Flowers, EG Flowers, GF Moores, HS Bennett, J Bardeen, J. A. Sauls, JA Sauls, JC Wheatley, K Maki, K Maki, LD Landau, M Combescot, N Schopohl, N Schopohl, O Avenel, P Wölfle, PR Roach, PW Anderson, R Movshovich, R Movshovich, RH McKenzie, S Kalbfeld, T. M. Haard, W. P. Halperin, WP Halperin, Y Lee, Y. Lee   +29 more
core   +1 more source

Revealing the Hidden Role of Cd in p‐Type Mg3Sb2: Enhanced Thermoelectric Performance by Grain Boundary Segregation Engineering

Advanced Functional Materials, EarlyView.
The hidden role of Cd segregation at grain boundaries is revealed in p‐type Mg3Sb2 by atom probe tomography and other advanced characterizations. Grain boundary Cd enrichment suppresses the SbMg+ hole‐killer formation and lowers potential barriers, enhancing electrical conductivity.
Zhou Li, Deming Dong, Xiaoyu Yang, Jun Qian, Mengruizhe Kong, Han Wan, Ni Ma, Wei Bai, Pengfei Nan, Binghui Ge, Jiming Song, G. Jeffrey Snyder, Yuan Yu   +12 more
wiley   +1 more source

Bioprinting Organs—Science or Fiction?—A Review From Students to Students

Advanced Healthcare Materials, EarlyView.
Bioprinting artificial organs has the potential to revolutionize the medical field. This is a comprehensive review of the bioprinting workflow delving into the latest advancements in bioinks, materials and bioprinting techniques, exploring the critical stages of tissue maturation and functionality.
Nicoletta Murenu, Camilla Mussoni, Mateo S. Andrade Mier, Paula Buettner, Nathaly Chicaiza‐Cabezas, Yi‐Yu Robin Dai, Jessica Faber, Maren Fiedler, Zan Lamberger, Xuen Jen Ng, Vanessa Moessler, Anna Rederer, Jonas Roeder, Sabrina Stecher, Katinka Theis, Jeanette Weigelt, Silvia Budday, Gregor Lang, Natascha Schaefer   +18 more
wiley   +1 more source

Cohesive approach for determining porosity and P-impedance in carbonate rocks using seismic attributes and inversion analysis

Journal of Petroleum Exploration and Production Technology
The assessment of hydrocarbon flow through seismic and well-log data presents a persistent challenge in determining porosity. The acoustic impedance section provides a visual representation of the layers, while the raw seismic data showcase the ...
Yasir Bashir, Numair Ahmed Siddiqui, Daniel Loro Morib, Amir Abbas Babasafari, Syed Haroon Ali, Qazi Sohail Imran, Abdullah Karaman   +6 more
doaj   +1 more source

Metallic multilayers for X-band Bragg reflector applications [PDF]

, 2016
We present a structural and high frequency (8.72GHz) electrical characterization of sputter deposited Ti/W, Ti/Ru and Mo/Ti metallic multilayers for potential application as acoustic Bragg reflectors.
Adabi, M, Hill, H, Klein, N, Liu, W, Mihai, AP, Petrov, PK   +5 more
core  

Stabilization of acoustic modes using Helmholtz and Quarter-Wave resonators tuned at exceptional points

, 2018
Acoustic dampers are efficient and cost-effective means for suppressing thermoacoustic instabilities in combustion chambers. However, their design and the choice of their purging air mass flow is a challenging task, when one aims at ensuring ...
Bourquard, Claire, Noiray, Nicolas
core   +1 more source

Forward Brillouin scattering acoustic impedance sensor using thin polyimide-coated fiber.

Optics Letters, 2018
The standard single-mode fiber has been demonstrated as an optomechanical sensor recently to measure the acoustic impedances of surrounding liquids by means of the generation and detection of forward-stimulated Brillouin scattering (FSBS).
D. Chow, L. Thévenaz
semanticscholar   +1 more source

Understanding the Effects of Conductive Polymer Electrode Coating on Recorded Neural Signals

Advanced Healthcare Materials, EarlyView.
Conductive polymer coatings are widely explored to improve the quality of signals recorded with chronically implanted neural electrodes, offering enhanced biocompatibility along with reduced electrode impedance. Combining computational modelling and data from PEDOT:PTS coated and PtIr electrodes in rats, we show that improvements in signal quality with
Karthik Sridhar, Judith Evers, Alexandre Trotier, Manus Biggs, Madeleine M. Lowery   +4 more
wiley   +1 more source