Results 81 to 90 of about 613,716 (303)

A Termite‐Inspired Alternative to Cement

open access: yesAdvanced Functional Materials, EarlyView.
A termite‐inspired composite of clay, cellulose, and lignin forms a dense fibrous network with concrete‐like strength (32 MPa) and superior elasticity, processed at ambient temperature. Abstract Clay combined with organic materials is used by termites as a strong and durable construction material for their mounds with minimal environmental impact. Here,
Oren Regev   +3 more
wiley   +1 more source

A Transfer-Learning-Based STL–LSTM Framework for Significant Wave Height Forecasting

open access: yesJournal of Marine Science and Engineering
Significant wave height (SWH) is a key descriptor of sea state, yet providing accurate, site-specific forecasts at low computational cost remains challenging.
Guanhui Zhao   +4 more
doaj   +1 more source

Are rogue waves really unexpected?

open access: yes, 2016
An unexpected wave is defined by Gemmrich & Garrett (2008) as a wave that is much taller than a set of neighboring waves. Their definition of "unexpected" refers to a wave that is not anticipated by a casual observer. Clearly, unexpected waves defined in
Fedele, Francesco
core   +1 more source

Wave Height Estimation from Shipborne X-Band Nautical Radar Images [PDF]

open access: yes, 2016
A shadowing-analysis-based algorithm is modified to estimate significant wave height from shipborne X-band nautical radar images. Shadowed areas are first extracted from the image through edge detection.
Gill, Eric William   +2 more
core   +2 more sources

Three‐dimensional Antimony Sulfide Based Flat Optics

open access: yesAdvanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang   +18 more
wiley   +1 more source

Evaluation of Chinese Quad-polarization Gaofen-3 SAR Wave Mode Data for Significant Wave Height Retrieval

open access: yesCanadian Journal of Remote Sensing, 2018
Our work describes the accuracy of Chinese quad-polarization Gaofen-3 (GF-3) synthetic aperture radar (SAR) wave mode data for wave retrieval and provides guidance for the operational applications of GF-3 SAR.
Shuai Zhu   +8 more
doaj   +1 more source

Sea State Bias Variability in Satellite Altimetry Data

open access: yesRemote Sensing, 2019
Sea State Bias (SSB) contributes to global mean sea level variability and it needs cm-level range adjustment due to the instrumental drift over time.
Yongcun Cheng   +5 more
doaj   +1 more source

High Resolution Current & Bathymetry Determined by Nautical X-Band Radar in Shallow Waters [PDF]

open access: yes, 2009
The wave and current monitoring system WaMoS II is a remote sensing system based on a nautical X-Band radar generally used for navigation and ship traffic control.
Bell, Paul S., Hessner, Katrin
core  

Local helioseismic and spectroscopic analyses of interactions between acoustic waves and a sunspot

open access: yes, 2010
Using a high cadence imaging spectropolarimetric observation of a sunspot and its surroundings in magnetically sensitive (FeI 6173 A) and insensitive (FeI 7090 A) upper photospheric absorption lines, we map the instantaneous wave phases and helioseismic ...
Bogdan   +13 more
core   +1 more source

Reflection and transmission in the ionosphere considering collisions in a first approximation [PDF]

open access: yes, 2008
Reflection and transmission coefficients (R and T) of high frequency waves propagating in the ionosphere are studied taking collisions into account.
Aydogdu, Mehmet   +2 more
core   +1 more source

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