Results 131 to 140 of about 5,467,977 (315)

Experimental Evaluation of Acoustical Materials for Noise Reduction in an Induction Motor Drive

open access: yesMachines
Electric propulsion motors are more efficient than internal combustion engines, but they generate high-frequency tonal noise, which can be perceived as annoying.
Ashish Kumar Sahu   +4 more
doaj   +1 more source

Intermountain Acoustic Musician, Volume 15 Number 4, April 1998

open access: yes, 1998
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core  

On‐Chip Photonic Neural Network Architectures

open access: yesAdvanced Optical Materials, EarlyView.
This review presents a comprehensive overview of on‐chip photonic neural network architectures, covering key photonic building blocks, representative network types, and emerging applications. Recent advances, implementation challenges, and future directions are examined, highlighting the potential of integrated photonics to enable ultrafast, energy ...
Seokjin Hong   +7 more
wiley   +1 more source

Intermountain Acoustic Musician, Volume 2 Number 2, February 1986

open access: yes, 1986
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core  

Freeform Light Routing in Nearly‐Hyperuniform Slabs: Toward a General‐Purpose Design Platform for Integrated Photonics

open access: yesAdvanced Optical Materials, EarlyView.
Nearly hyperuniform disordered photonic slabs guide light along prescribed freeform pathways without relying on lattice symmetry. A pathway‐first design embeds curved channels within a photonic bandgap hyperuniform network, maintaining high transmission through freeform bends.
Timothy Amoah   +8 more
wiley   +1 more source

Intermountain Acoustic Musician, Volume 16 Number 1, January 1999

open access: yes, 1999
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core  

Extrinsic Limitations of Stealthy Hyperuniform Devices

open access: yesAdvanced Optical Materials, EarlyView.
Stealthy hyperuniform devices exhibit a scattering‐free angular region whose extent follows a simple quenching equation. Experimental measurements confirm this prediction but reveal quenching efficiencies far below theoretical expectations. Multiple scattering and finite‐size effects are quantified, establishing realistic performance limits for ...
Yuhao Xu   +5 more
wiley   +1 more source

Intermountain Acoustic Musician, Volume 6 Number 9, September 1989

open access: yes, 1989
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core  

Bright‐Dark Exciton Splitting in Lead Iodide Perovskite Crystals Accessed via Quantum Beats in Photon Echoes

open access: yesAdvanced Optical Materials, EarlyView.
Understanding exciton fine structure is crucial for optoelectronic and quantum photonic applications of lead halide perovskites. It is demonstrated that polarization‐sensitive photon‐echo spectroscopy in a magnetic field resolves exciton fine‐structure splittings hidden by inhomogeneous broadening, enabling direct determination of the bright‐dark ...
M. Alex Hollberg   +9 more
wiley   +1 more source

STUDIES AND RESEARCH CONCERNING THE USE OF SOME RECYCLABLE ABSORBENT MATERIALS FOR INCREASING ACOUSTIC COMFORT INTO A ROOM DESIGNED FOR SPEAKING

open access: yesScientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2017
The acoustic comfort of a speech hall is characterized by acoustic parameters. These parameters depend by on the hall volume, construction and design materials. On the hall ceiling (the most unused surface), some various acoustic devices can be installed
Florin Marian Nedeff   +2 more
doaj  

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