Results 21 to 30 of about 705,883 (316)

2D Modeling of Wave Propagation in Shallow Water by the Method of Characteristics [PDF]

open access: yesArchives of Acoustics, 2022
In this paper, a 2D numerical modeling of sound wave propagation in a shallow water medium that acts as a waveguide, are presented. This modeling is based on the method of characteristic which is not constrained by the Courant–Friedrichs–Lewy (CFL ...
Mohammad Reza Khalilabadi
doaj   +1 more source

Mode-dependent Loss and Gain Emulation in Coupled SDM Transmission [PDF]

open access: yes, 2020
Space-division multiplexing (SDM) is currently the only solution to cope with the exponential growth of data traffic in optical transmission networks. The performance of long-haul SDM transmission is fundamentally limited by mode-dependent loss (MDL) and
Chigo Okonkwo   +9 more
core   +1 more source

Analytical and computational acoustic modelling of side outlet muffler and its extension in the modelling of tapered side outlet [PDF]

open access: yesArchives of Acoustics, 2022
Mufflers are popular in the suppression of noise levels coming from various machinery. The most common parameters for the evaluation of the performance of mufflers are transmission loss, noise level, and insertion loss. The transmission loss is evaluated
Sandeep Kumar Vishwakarma   +1 more
doaj   +1 more source

Spin-electric coupling in quantum dots and molecular magnets [PDF]

open access: yes, 2011
In this thesis we study several aspects related to the dynamics of electrons and holes in quantum dots, as well as dynamics of electron spins in molecular magnets.
Trif, Mircea
core   +1 more source

Topology Optimization of Low-Loss Z-Bend 2D Photonic Crystal Waveguide

open access: yesPhotonics, 2023
In this article, we design a low-loss, high-bandwidth Z-bend photonic silicon crystal waveguide bending in a triangular lattice through topology optimization.
Gang Liu   +6 more
doaj   +1 more source

Transmission Loss of Plasterboard Walls [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1966
Although test data are available for many variations of the typical plasterboard wall, there are enough minor variations in construction or test technique that it is difficult to deduce accurately the effects of the various parameters. Accordingly, a systematic study has been made of a number of experimental and practical walls.
openaire   +1 more source

Design and Fabrication Challenges for Millimeter-Scale Three-Dimensional Phononic Crystals

open access: yesCrystals, 2017
While phononic crystals can be theoretically modeled with a variety of analytical and numerical methods, the practical realization and comprehensive characterization of complex designs is often challenging.
Frieder Lucklum, Michael J. Vellekoop
doaj   +1 more source

Compositional analysis of InAs-GaAs-GaSb heterostructures by low-loss electron energy loss spectroscopy [PDF]

open access: yes, 2013
As an alternative to Core-Loss Electron Energy Loss Spectroscopy, Low-Loss EELS is suitable for compositional analysis of complex heterostructures, such as the InAs-GaAs-GaSb system, since in this energy range the edges corresponding to these elements ...
Taboada, Alfonso G.   +12 more
core   +1 more source

Sound transmission testing of polymer compounds [PDF]

open access: yes, 2012
This is the post-print version of the final paper published in Polymer Testing. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ...
Silver, J   +3 more
core   +1 more source

Predicting Acoustic Transmission Loss Uncertainty in Ocean Environments with Neural Networks

open access: yesJournal of Marine Science and Engineering, 2022
Computational predictions of acoustic transmission loss (TL) in ocean environments depend on the relevant environmental characteristics, such as the sound speed field, bathymetry, and seabed properties.
Brandon M. Lee   +2 more
doaj   +1 more source

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