Results 91 to 100 of about 40,877 (227)

Engineering Thermal Emission with Enhanced Emissivity and Quality Factor Using Bound States in the Continuum and Electromagnetically Induced Absorption

open access: yesAdvanced Optical Materials, Volume 14, Issue 6, 9 February 2026.
A metal‐based thermal metasurface supporting bound states in the continuum is demonstrated and experimentally shown to achieve a record‐high quality factor of 202 and high emissivity of 0.82. The design offers thermally stable, narrowband mid‐infrared emission, making it ideal for high‐precision gas sensing applications.
Guodong Zhu   +8 more
wiley   +1 more source

RESEARCH ON THE DIRECTIVITY RESPONSE OF THE SPHERICAL PENDULUM SEISMOGRAPH

open access: yesJixie qiangdu, 2022
To solve the problem that the Houfeng Seismograph’s directional function’s historical record was generally questioned. The analysis concludes that the spherical pendulum seismic measurement scheme may be a feasible restoration scheme with Rayleigh wave ...
LIU Zhao   +4 more
doaj  

Calculating dispersion relations for waveguide immersed in perfect fluid

open access: yesMathematical Modelling and Analysis, 2018
Conventional finite element method (FEM) is capable of obtaining wave solutions, but large discretized structures at high frequency require high computational resources, the computational domain can be reduced by combining FEM with analytical assumption ...
Audrius Nečiūnas   +2 more
doaj   +1 more source

Acoustic Sensing as a Tool for Brain Tumor Diagnostics

open access: yesAdvanced Sensor Research, Volume 5, Issue 2, February 2026.
Surface acoustic wave (SAW) sensing is used to distinguish non‐neoplastic brain tissue from primary and metastatic tumors based on their acoustic attenuation signatures. Ex vivo human brain samples reveal clear tissue‐specific mechanical profiles, correlating with stiffness and malignancy.
Melanie E. M. Stamp   +6 more
wiley   +1 more source

Taking into Account Material Damping in Seismic Analysis of Structures

open access: yesTehnički Glasnik, 2020
The purpose of this paper is to justify that it is necessary to take into account physical and mechanical properties of soil and different materials of erected structures for damping vibrations in dynamic loads, and to suggest tools for modelling the ...
Mariia S. Barabash   +2 more
doaj  

Estimate of Small Stiffness and Damping Ratio in Residual Soil Using Spectral Analysis of Surface Wave Method

open access: yesMATEC Web of Conferences, 2016
Research in the important parameters for modeling the dynamic behavior of soils has led to rapid development of the small strain stiffness and damping ratio for use in the seismic method. It is because, the experimental determination of the damping ratio
Bawadi Nor Faizah   +3 more
doaj   +1 more source

A Clinically Compatible Method for Generating Preoperative Finite Element Models to Simulate Facial Appearance and Movements in Orthognathic Surgery

open access: yesInternational Journal for Numerical Methods in Biomedical Engineering, Volume 42, Issue 2, February 2026.
This study focuses on the development of a new method, compatible with a clinical routine, for generating pre‐surgery patient‐specific Finite Element (FE) meshes from a reference mesh, as faithful as possible to the anatomy, including soft tissues (skin, hypodermis, muscles) as well as bony structures (mandible and maxilla).
Marie‐Charlotte Picard   +6 more
wiley   +1 more source

On the Method of Harmonic Balance for Lumped‐Element Transformer Models

open access: yesInternational Journal of Circuit Theory and Applications, Volume 54, Issue 2, Page 625-637, February 2026.
The steady‐state solution of a lumped‐element transformer model with a dry friction‐like hysteresis model depicting the magnetic core is of interest. The harmonic balance method efficiently solves this stiff system. We derive the harmonic balance algorithm, enhance it with performance and convergence improvements, and demonstrate its efficiency by ...
Alexander Sauseng   +5 more
wiley   +1 more source

A procedure to estimate the dynamic damped behavior of fiber reinforced composite beams submitted to flexural vibrations

open access: yesMaterials Research, 2001
This work proposes a procedure to estimate the dynamic damped behavior of fiber reinforced composite beams in flexural vibrations. A set of experimental dynamic tests were carried out in order to investigate the natural frequencies and modal shapes ...
Volnei Tita   +2 more
doaj   +1 more source

Spin transfer and current-induced switching in antiferromagnets

open access: yes, 2009
We present theoretical description of the precessional switching processes induced by simultaneous application of spin-polarized current and external magnetic field to antiferromagnetic component of the "pinned" layer.
A. I. Akhiezer   +7 more
core   +1 more source

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