Results 41 to 50 of about 1,535 (264)

A Novel Mode-Stirred Reverberation Chamber Design for 5G Millimeter Wave Bands

IEEE Access, 2021
A novel mode-stirred reverberation chamber (RC) is designed and analyzed for millimeter wave bands. The size of the proposed RC with dimensions of 0.9 m × 0.9 m × 1.1 m is suitable for user equipment (UE) tests.
Zhiqin Wang, Yuxin Ren, Yu Zhang, Chong Pan, Xiang Zhang   +4 more
doaj   +1 more source

The study of the effectiveness of sound insulation of gypsum wall boards with “Shimast” coating [PDF]

MATEC Web of Conferences, 2020
The article presents the experimental studies of sound insulation of a single-layer barrier made of gypsum wall boards with a thin-layer coating. The coating consists of a viscous base and glass airless microgranules. The coating increases the efficiency
Totunov Semen, Ivanov Michael, Ivanova Olga   +2 more
doaj   +1 more source

Hydrogel‐Based Airway‐on‐Tube With Perfusable Endothelial Lumen and Outward Epithelialization

Advanced Materials, EarlyView.
A hydrogel‐based airway‐on‐tube platform featuring a perfusable endothelial lumen and outward epithelialization is presented. The system supports primary human bronchial epithelial and lung microvascular endothelial coculture under air‐liquid interface conditions.
Ali Doryab, Jack F. Murphy, Michael Bartolf‐Kopp, Jenny C‐C Hsin, Alice Chernaik, Frank McCaughan, Yan Yan Shery Huang, Tomasz Jungst, Jürgen Groll   +8 more
wiley   +1 more source

Comparative Study of the Acoustic Efficiency of Prototype Sound Absorbing Panels Used in the Railway Track

Archives of Acoustics
The article presents the results of comparative studies concerning the efficiency of systems aimed at minimising the acoustic nuisance of noise generated by the railway vehicle movement.
Grzegorz KLEKOT, Mariusz WĄDOŁOWSKI, Cezary KRAŚKIEWICZ, Artur ZBICIAK   +3 more
doaj   +1 more source

Chiral Phonon–Driven Ultrafast Spin Currents in a Non‐Magnetic Ferroelectric

Advanced Materials, EarlyView.
Broadband terahertz emission spectroscopy shows signatures of ultrafast spin‐current generation in non‐magnetic ferroelectric β$\beta$’‐In2Se3${\rm In}_2{\rm Se}_3$. Reversal of the emitted field upon sample inversion and substitution of Pt with W indicates spin‐Hall‐mediated charge conversion, while polarization‐resolved measurements reveal ...
Thomas B. Gill, Ahmet Yagmur, Matthew Rogers, Luke Benson, Nathan Fox, Ben Muggleton, Zabeada Aslam, Conor McCluskey, Phoenix Robinson, Oscar Cespedes, Bryan Hickey, Timothy Moorsom, Marty Gregg, Edmund H. Linfield, Sukhdeep Dhillon, Satoshi Sasaki, Joshua R. Freeman   +16 more
wiley   +1 more source

Acoustic tests of type KPF1 high-pressure external gear pumps

Technical Transactions, 2020
This article presents the results of testing the sound pressure level and sound power level of the experimental 3PW-KPF1-24-40-2-776 high-pressure gear pump. Acoustic tests were conducted in an reverberation chamber.
Osiński Piotr, Rutański Janusz, Bury Paweł, Cieślicki Rafał   +3 more
doaj   +1 more source

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

Impacts of Absorber Loadings on Simulating the Multipath Channel in a Reverberation Chamber

International Journal of Antennas and Propagation, 2017
In reverberation chambers, the multipath channels with different delay characteristics can be generated by loading the chamber with different amounts of absorbers.
Xin Zhou, Zhangdui Zhong, Xin Bian, Ruisi He, Ke Guan, Ruoyu Sun, Ke Liu, Xiaotao Guo   +7 more
doaj   +1 more source

On the Time Domain Error Caused By the Frequency Domain Sampling Rate in a Reverberation Chamber

IEEE Access, 2019
The time domain (TD) response of a reverberation chamber (RC) can be obtained from the inverse Fourier transform of the measured S-parameters in the frequency domain (FD).
Jianhua Xu, Yongjiu Zhao, Qian Xu
doaj   +1 more source

Consensus Formation and Change are Enhanced by Neutrality

Advanced Science, EarlyView.
Neutral agents are shown to enhance both the formation and overturning of consensus in collective decision‐making. A general mathematical model and experiments with locusts and humans reveal that neutrality enables robust consensus via simple interactions and accelerates consensus change by reducing effective population size.
Andrei Sontag, Janina A. Hoffmann, Tim Rogers, Christian A. Yates   +3 more
wiley   +1 more source