Results 21 to 30 of about 1,676,951 (287)

Linking Magma Storage and Ascent to Eruption Volume and Composition at an Arc Caldera

open access: yesGeophysical Research Letters, 2020
Conceptual models of magma storage and transport under calderas favor a connected system of sills and dikes. These features are individually below the resolution of standard seismic tomography, but radial seismic anisotropy can reveal where they exist in
David Miller   +7 more
doaj   +1 more source

Analysis and Elimination of Unwanted Resonances for Wideband Reflectarray Antenna Design at Sub-Millimeter Waves

open access: yesIEEE Access, 2020
In this study, unwanted additional resonances are analyzed and a method is developed to eliminate them for wideband offset dual reflectarray antenna at sub-millimeter waves.
Eun-Cheol Choi, Sangwook Nam
doaj   +1 more source

Slot Waveguide Enhanced Bloch Surface Waves

open access: yesApplied Sciences, 2017
The paper presents a novel concept for the on-chip integration of a multilayer platform sustaining Bloch surface waves further enhanced by the so-called slot waveguide effect.
Matthieu Roussey
doaj   +1 more source

Application of an Automatic Noise or Signal Removal Algorithm Based on Synchrosqueezed Continuous Wavelet Transform of Passive Surface Wave Imaging: A Case Study in Sichuan, China

open access: yesApplied Sciences, 2021
Passive surface wave imaging based on noise cross-correlation has been a research hotspot in recent years. However, because randomness of noise is difficult to achieve in reality, prominent noise sources will inevitably affect the dispersion measurement.
Jie Fang, Guofeng Liu, Yu Liu
doaj   +1 more source

The Transformation from Surface Wave into Radiation Wave Using Composite Subwavelength Holes Array

open access: yesAdvanced Photonics Research, 2022
Smith–Purcell radiation (SPR) is a phenomenon in that free electrons moving above a periodic structure deliver a part of their kinetic energies to electromagnetic waves.
Ping Zhang   +8 more
doaj   +1 more source

Estimation of Low-Velocity Landfill Thickness with Multi-Method Seismic Surveys

open access: yesGeotechnics, 2023
Conventional geophysical methods are suitable for estimating the thicknesses of subsoil layers. By combining several geophysical methods, the uncertainties can be assessed.
Yaniv Darvasi, Amotz Agnon
doaj   +1 more source

Optical surface waves in periodic layered media [PDF]

open access: yes, 1978
A generalized analysis of wave propagation in periodic layered media is applied to the special case of optical surface waves. These waves, confined to the interface between a periodic layered medium and a homogeneous medium, are formally analogous to ...
Cho, A. Y., Yariv, Amnon, Yeh, Pochi
core   +1 more source

On-chip metasurfaces unlock efficient vector terahertz beams

open access: yesOpto-Electronic Advances
An efficient on-chip platform for generating customizable vectorial optical fields is crucial and highly-pursued. While on-chip metasurfaces have opened up avenues for multi-functional coupling from on-chip surface wave to free-space propagating wave ...
Jitao Ji, Tao Li, Shining Zhu
doaj   +1 more source

Dyadic Green's Functions and Guided Surface Waves for a Surface Conductivity Model of Graphene

open access: yes, 2008
An exact solution is obtained for the electromagnetic field due to an electric current in the presence of a surface conductivity model of graphene. The graphene is represented by an infinitesimally-thin, local and isotropic two-sided conductivity surface.
Chew W. C.   +3 more
core   +2 more sources

Influence of Soil Plugging on Dynamic Soil Response During Simulated Pipe Pile Driving Model Test in Sands

open access: yesApplied Sciences
The squeezing effect and strike-induced vibration generated by pile driving pose a threat to adjacent structures. To mitigate the squeezing effect, open-ended pipe piles were implemented. However, this type of pile brings a degree of soil-plugging effect,
Songchao Lin, Ye Lu, Chong Zhao
doaj   +1 more source

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