Results 121 to 130 of about 911,873 (313)

On the origin of high m magnetospheric waves [PDF]

, 2010
A survey of Advanced Rio-Imaging Experiment in Scandinavia data reveals evidence for a previously overlooked generation mechanism of high azimuthal wave number magnetospheric waves.
Honary, F., Kavanagh, Andrew J., Beharrell, Matthew J.   +2 more
core  

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Space Vector‐Signal Generator Based on High‐Order Amplitude‐Phase Modulated Programmable Metasurface

Small Structures
Direct modulation of radio frequency (RF) signals has broad applications in wireless communications, radar detection, and other fields. However, the traditional methods face the limitations of high bandwidth requirements and poor noise resistance in ...
Zhen Jie Qi, Shao Nan Chen, Jun Yan Dai, Jun Wei Zhang, Li Jie Wu, Hui Dong Li, Tie Jun Cui, Qiang Cheng   +7 more
doaj   +1 more source

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source

A synthetic moving-envelope metasurface antenna for independent control of arbitrary harmonic orders

Nature Communications
Flexible frequency controls are crucial in many photonic and electronic applications, ranging from communications systems, spectroscopy, and metrology to quantum information processing.
Geng-Bo Wu, Jun Yan Dai, Kam Man Shum, Ka Fai Chan, Qiang Cheng, Tie Jun Cui, Chi Hou Chan   +6 more
doaj   +1 more source

Fundamentals and applications of millimeter-wave and terahertz programmable metasurfaces

Journal of Materiomics
Millimeter-wave and terahertz frequency bands are receiving more and more attention due to their big potentials for widespread applications such as in high-speed communications and high-resolution imaging.
Xiaojian Fu, Peng Wang, Yujie Liu, Yuan Fu, Qingdong Cai, Yu Wang, Silei Yang, Tie Jun Cui   +7 more
doaj   +1 more source

A global investigation of solitary-wave solutions to a two-parameter model for water waves

, 1996
The model equation (2r''''/15)-(br'')+(ar)+(3r^2/2)-((r')^2/2)+[rr']'=0 arises as the equation for solitary-wave solutions to a fifth-order long-wave equation for gravitycapillary water waves.
Groves, MD, Champneys, AR
core  

Explicit models for flexural edge and interfacial waves in thin elastic plates [PDF]

, 2011
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.In the thesis explicit dual parabolic-elliptic models are constructed for the Konenkov flexural edge wave and the Stoneley-type flexural interfacial wave in
Kossovich, Elena
core  

Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing

Advanced Engineering Materials, EarlyView.
The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai, Zeki Ayrildi, Buse Şen, Maik Rajkowski, Mathias Redondo Garcia, Markus Stricker, Guillaume Laplanche   +6 more
wiley   +1 more source