Results 71 to 80 of about 3,306,688 (343)

Orthogonal experimental research on sensitivity of acoustic wave velocity of similar material of coal-rock

open access: yesGong-kuang zidonghua, 2017
In view of problem that current researches mostly focused on mechanical properties of similar material of coal-rock, but not change law of acoustic wave velocity, similar material of coal-rock was made by use of raw materials of coal slime, sand, cement ...
ZHOU Jin, WANG Leisheng
doaj   +1 more source

Miniature Nanomesh Mechano‐Acoustic Sensor with Wide Linear Dynamic Range, Broad Bandwidth, and Flat Frequency Response

open access: yesAdvanced Functional Materials, EarlyView.
A miniaturized mechano‐acoustic sensor is developed using an electrospun PVDF nanomesh as the diaphragm in a capacitive sensor structure. Unlike conventional nanomesh‐based sensors, it achieves high linear sensitivity, a broad and flat frequency response, and a compact form factor.
Jeng‐Hun Lee   +8 more
wiley   +1 more source

Transverse vibration modes analysis and acoustic response in optical fibers

open access: yesAIP Advances, 2023
Fiber optic sensors are often used as acoustic sensors to detect sound waves because of their apparent advantages, such as anti-electromagnetic interference and strong adaptation to the environment.
Huojiao Sun   +4 more
doaj   +1 more source

Surface-acoustic-wave-driven luminescence from a lateral p-n junction

open access: yes, 2007
The authors report surface-acoustic-wave-driven luminescence from a lateral p-n junction formed by molecular beam epitaxy regrowth of a modulation doped GaAs/AlGaAs quantum well on a patterned GaAs substrate.
Anderson, D.   +11 more
core   +1 more source

Spin and orbital angular momenta of acoustic beams [PDF]

open access: yes, 2019
We analyze spin and orbital angular momenta in monochromatic acoustic wave fields in a homogeneous medium. Despite being purely longitudinal (curl-free), inhomogeneous acoustic waves generically possess nonzero spin angular momentum density caused by the
Bliokh, Konstantin Y., Nori, Franco
core   +2 more sources

Peptide Sequencing With Single Acid Resolution Using a Sub‐Nanometer Diameter Pore

open access: yesAdvanced Functional Materials, EarlyView.
To sequence a single molecule of Aβ1−42–sodium dodecyl sulfate (SDS), the aggregate is forced through a sub‐nanopore 0.4 nm in diameter spanning a 4.0 nm thick membrane. The figure is a visual molecular dynamics (VMD) snapshot depicting the translocation of Aβ1−42–SDS through the pore; only the peptide, the SDS, the Na+ (yellow/green) and Cl− (cyan ...
Apurba Paul   +8 more
wiley   +1 more source

Acoustic wave analysis [PDF]

open access: yes, 1968
The primary mechanism for generation of acoustic waves in a centrifugal pump, due to the rotor/stator interaction, is an unsteady source at the entrance of the blade row as represented by the unsteady velocity field.
Jackson, E. D.
core   +1 more source

Implementation of dispersion-free slow acoustic wave propagation and phase engineering with helical-structured metamaterials

open access: yesNature Communications, 2016
The ability to slow down wave propagation in materials has attracted significant research interest. A successful solution will give rise to manageable enhanced wave–matter interaction, freewheeling phase engineering and spatial compression of wave ...
Xue‐Feng Zhu   +6 more
semanticscholar   +1 more source

Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb2S3

open access: yesAdvanced Functional Materials, EarlyView.
Microscale control of thermal conductivity in Sb2S3 is demonstrated via laser‐induced rotating lattice crystals. Thermal conductivity imaging reveals marked thermal transport anisotropy, with the c axis featuring amorphous‐like transport, whereas in‐plane directions (a, b) exhibit 3.5x and 1.7x larger thermal conductivity.
Eleonora Isotta   +13 more
wiley   +1 more source

Interaction of Electromagnetic and in Conductors and its Utilization

open access: yesCommunications, 2003
The paper deals with the interaction of electromagnetic and acoustic processes in a conducting medium in presence of an external magnetic field. The electromagnetic excitation of acoustic wave similarly as acoustic excitation of electromagnetic wave is ...
Ivo Cap, Klara Capova, Dagmar Faktorova
doaj   +1 more source

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