Results 41 to 50 of about 4,257,836 (266)

Porcupine‐Quill‐Inspired Shape‐Morphing Biointerfaces Disassemble Biofilms [PDF]

Advanced science
A porcupine‐spine‐inspired dynamic offensive bio‐interface is developed for active biofilm disassembly. By coupling electrically driven nano‐dagger penetration with light‐triggered ROS generation, the surface overcomes the passive limitations of conventional mechano‐bactericidal topographies, achieving near‐complete biofilm eradication, strong ...
Qian F, Xia M, Wang Z, Jia X, Yin J, Fu M, Zhang X, Shi X, Chen S, Wang N, Chen Z.   +10 more
europepmc   +2 more sources

Bistatic Radar Imaging of the Marine Environment—Part I: Theoretical Background

IEEE Transactions on Geoscience and Remote Sensing, 2007
We describe in detail the theoretical and practical implementation aspects of a simulation for marine radars which can, in particular, be used in multistatic configurations. Since the simulator is intended to deliver pseudoraw signals, it can be used later as a tool to benchmark and improve postprocessing algorithms such as bistatic synthetic aperture ...
Andreas Arnold-Bos, Ali Khenchaf, Arnaud Martin 0001   +2 more
openaire   +3 more sources

Bistatic Radar Imaging of the Marine Environment—Part II: Simulation and Results Analysis [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2007
We present a bistatic, polarimetric, and real aperture marine radar simulator (MaRS) producing pseudoraw radar signals. The simulation takes the main elements of the environment into account (sea temperature, salinity, and wind speed). Realistic sea surfaces are generated using a two-scale model on a semideterministic basis to incorporate the presence ...
Andreas Arnold-Bos, Ali Khenchaf, Arnaud Martin 0001   +2 more
openaire   +1 more source

Observation of Whole Flushing Process of a River Sand Bar by a Flood Using X-Band Radar

Journal of Marine Science and Engineering, 2016
Morphological changes during a flood event in July 2010 were observed with X-band marine radar at the mouth of Tenryu River, Shizuoka, Japan. Radar images were collected hourly for more than 72 h from the beginning of the flood and processed into time ...
Satoshi Takewaka
doaj   +1 more source

Coastal Oceanography Applications of Digital Image Data from Marine Radar

Journal of Atmospheric and Oceanic Technology, 2000
A marine radar attached to a digital image capture system has been adapted for deployment from shore sites. Optimum operating parameters have been identified in relation to the resolution and sampling capabilities of both the radar and the digitization system.
Robinson, I.S., Ward, N.P., Gommenginger, C.P., Tenorio-Gonzales, M.A.   +3 more
openaire   +2 more sources

Wind Direction Extraction from X-Band Marine Radar Images Based on the Attenuation Horizontal Component

Remote Sensing, 2023
This paper presents a novel algorithm based on the attenuation horizontal component for wind direction retrieval from X-band marine radar images. The range dependence of radar return on the ocean surface can be presented in radar images, and the radar ...
Huanyu Yu, Zhizhong Lu, Hui Wang
doaj   +1 more source

Meteo-Marine Parameters and Their Variability Observed by High Resolution Satellite Radar Images [PDF]

Oceanography, 2013
New radar satellites image the sea surface with resolutions as high as 1 m. A large spectrum of ocean processes can be estimated using such Earth observation data. These data have been applied to investigations of geophysical processes as well as to forecast model validations and near-real-time services. The numerous processes, parameters, and features
Lehner, Susanne, Pleskachevsky, Andrey, Velotto, Domenico, Jacobsen, Sven   +3 more
openaire   +4 more sources

Dimensionality‐Driven Interfacial Electronic Coupling in Carbon‐Supported Gd‐CuO Catalysts for Selective CO2 Electroreduction to Ethylene

Advanced Functional Materials, EarlyView.
The 2D carbon‐supported Gd–CuO exhibits strong interfacial electronic coupling, abundant oxygen vacancies, and highly exposed active sites, enabling efficient CO enrichment and C─C coupling toward selective and durable CO2‐to‐C2H4 conversion. ABSTRACT Copper‐based catalysts are promising for electrochemical CO2 reduction toward value‐added chemicals ...
Xueya Zhu, Binghao Shen, Mengshan Chen, Yue Hu, Ruijie Xia, Senwei Ji, Zhi Teng, Donglin Xie, Shunli Li, Xue Zhao, Hermenegildo Garciad, Yingtang Zhou   +11 more
wiley   +1 more source

Study of Ocean Waves Measured by Collocated HH and VV Polarized X-Band Marine Radars

International Journal of Antennas and Propagation, 2016
The significant wave height (SWH) retrieved from collocated HH and VV polarized X-band marine radars under different sea states is studied. The SWH are retrieved from different principal components of X-band marine radar image sequence.
Zhongbiao Chen, Yijun He, Wankang Yang
doaj   +1 more source

Breaking the Surface: Buoyant Metal–Polymer Open–Cell Hybrid Lattice Metamaterials

Advanced Materials, EarlyView.
Open‐cell metal–polymer lattice metamaterials that defy sinking. (a) Injection process of the polyurethane (PU) foam into the titanium (Ti‐6Al‐4V) hollow‐strut lattice creating the open‐cell Ti‐6Al‐4V+PU hybrid lattice, (b) flotation test of a hybrid lattice specimen, and (c) a digital representation and experimental validation of a marine buoy ...
Jordan Noronha, Joey Tallon, Raad Omar, Jason Dash, Andrey Molotnikov, Martin Leary, Milan Brandt, Ma Qian   +7 more
wiley   +1 more source