Results 41 to 50 of about 40,877 (227)

Versatile Control of Spectral Emissivity in Mid‐Infrared Metasurfaces via Silicon Microstructuring

Advanced Optical Materials, EarlyView.
A family of metasurfaces is obtained very simply, solely through the structuration of a single‐crystal silicon surface, without any other material involved. Based on the infrared plasmonic behavior of highly doped silicon, further control of surface topography by micro‐ and nano‐structuration is found to enable an avenue of options toward tailoring its
Kirollos Ernest Matta, Elyes Nefzaoui, Ahmed A. Elsayed, Armande Hervé, Martine Gnambodoe‐CapoChichi, Frédéric Marty, Mazen Erfan, Yasser M. Sabry, Abdelkrim Khelif, Tarik Bourouina   +9 more
wiley   +1 more source

High Frequency Longitudinal Damped Vibrations of a Cylindrical Ultrasonic Transducer

Shock and Vibration, 2014
Ultrasonic piezoelectric transducers used in classical nondestructive testing are producing in general longitudinal vibrations in the MHz range.
Mihai Valentin Predoi, Cristian Cătălin Petre, Ovidiu Vasile, Mihail Boiangiu   +3 more
doaj   +1 more source

NON-RIGID KINEMATIC EXCITATION FOR MULTIPLY-SUPPORTED SYSTEM WITH HOMOGENEOUS DAMPING

International Journal for Computational Civil and Structural Engineering, 2018
This paper continues the discussion of linear equations of motion. The author considers non-rigid kinematic excitation for multiply-supported system leading to the deformations in quasi-static response. It turns out that in the equation of motion written
Alexander G. Tyapin
doaj   +1 more source

INFLUENCE OF MATERIAL DAMPING ON THE RESPONSE OF UNDERGROUND STRUCTURES SUBJECTED TO EARTHQUAKE

Acta Polytechnica CTU Proceedings, 2020
The paper describes a finite element simulation of the response of a real underground structure subjected to earthquake using GEO5 FEM program. It concentrates on the influence of material damping with respect to a specific type of boundary condition ...
Veronika Pavelcová, Tereza Poklopová, Michal Šejnoha, Tomáš Janda   +3 more
doaj   +1 more source

Two‐Phase Nanofluid Flow in a Non‐Newtonian Model Past a Deformable Sheet With Magnetized Environmental Effects: Statistical Modeling and ANOVA Analysis

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This paper presents a comprehensive numerical analysis of magnetohydrodynamic (MHD) Casson nanofluid movement over a permeable, linearly stretching sheet, integrating the contributions of non‐uniform heat generation or absorption and chemical interaction.
Manoj Kumar Sahoo, MD. Shamshuddin, Subhajit Panda, Umair Khan   +3 more
wiley   +1 more source

Fundamental study of damping models with enhanced frequency independence in nonlinear seismic response analysis

Japan Architectural Review
Causal hysteretic damping, extended Rayleigh damping, and uniform damping models exhibit frequency‐independent damping ratios over a wide frequency range.
Akira Ota, Naohiro Nakamura, Kunihiko Nabeshima, Yoshihiro Mogi, Masafumi Kawabata   +4 more
doaj   +1 more source

Investigating the relationship between simulation parameters and flow variables in simulating atmospheric gravity waves for wind energy applications [PDF]

Wind Energy Science
Wind farms, particularly offshore clusters, are becoming larger than ever before. Besides influencing the surface wind flow and the inflow for downstream wind farms, large wind farms can trigger atmospheric gravity waves in the inversion layer and the ...
M. A. Khan, D. Allaerts, S. J. Watson, M. J. Churchfield   +3 more
doaj   +1 more source

High Precision Analyses of Lyman alpha Damping Wing of Gamma-Ray Bursts in the Reionization Era: On the Controversial Results from GRB 130606A at z = 5.91

, 2015
The unprecedentedly bright afterglow of Swift GRB 130606A at z = 5.91 gave us a unique opportunity to probe the reionization era by high precision analyses of the redward damping wing of Ly alpha absorption, but the reported constraints on the neutral ...
Aoki, Kentaro, Hattori, Takashi, Kawai, Nobuyuki, Totani, Tomonori   +3 more
core   +1 more source

Benchmark footbridge for vibration serviceability assessment under vertical component of pedestrian load [PDF]

, 2012
Vibration serviceability criteria are governing the design and determining the cost of modern, slender footbridges. Efficient and reliable evaluation of dynamic performance of these structures usually requires a detailed insight into the structural ...
Živanović, Stana
core   +1 more source

Rayleigh Damping in the Free Troposphere

Journal of the Atmospheric Sciences, 2014
Abstract This paper explores whether cumulus drag (i.e., the damping of winds by convective momentum transport) can be described by an effective Rayleigh drag (i.e., the damping of winds on a constant time scale). Analytical expressions are derived for the damping time scale and descent speed of wind profiles as caused by unorganized ...
openaire   +1 more source