Results 61 to 70 of about 56,958 (289)
Time-Delay Multiplexing of Two Beams in a Terahertz Imaging Radar [PDF]
, 2010 We demonstrate a time-delay multiplexing technique that doubles the frame rate of a 660–690-GHz imaging radar with minimal additional instrument complexity.
Bryllert, Tomas +5 more
core +1 more source
Advanced Materials Technologies, EarlyView.Flexible Chitosan‐glycerol sensor integrated with porous laser‐induced graphene (LIG) electrodes enable room‐temperature chemiresistive detection of ammonia (NH3) and proof‐of‐concept detection of fish spoilage. ABSTRACT We report a metal‐free sensor platform combining laser induced graphene (LIG) electrodes with drop‐deposited, glycerol‐plasticized ...
Mintesinot Tamiru Mengistu +9 more
wiley +1 more source
Development of Sea Surface Wind Monitoring System using Marine Radar
한국해양공학회지, 2018 A wave buoy commonly used for measurements in marine environments is very useful for measurements on the sea surface wind and waves. However, it is constantly exposed to external forces such as typhoons and the risk of accidents caused by ships ...
Jun-Soo Park
doaj +1 more source
Advanced Materials Technologies, EarlyView.ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel +4 more
wiley +1 more source
A model function for the ocean-normalized radar cross section at 14 GHz derived from NSCAT observations [PDF]
Deleted DOIs, 1999 A model for the ocean surface normalized radar cross section σo is derived from 3 months of NASA scatterometer (NSCAT) observations (September 15 to December 18, 1996). The model expresses σo as a function of wind speed, relative wind direction, incidence angle, and polarization.
Frank J. Wentz, Deborah K. Smith
openaire +2 more sources
Radar imaging mechanism of the Birkenfels wreck in the southern North Sea [PDF]
, 2010 Varying tidal currents close to the sea bed cause sediment motion around wrecks leading to formation of scour holes and sand ribbons. Consequently, scouring destabilizes the position and shape of wrecks. Changing water depths above the shallowest parts
Hennings, Ingo, Herbers, Dagmar
core
Radar cross-section of microstrip antenna on normally biased ferrite substrate
Electronics Letters, 1989 Calculated results for the radar cross-section of a microstrip antenna on a ferrite substrate are presented, and it is shown that the peaks in the RCS can be moved with respect to frequency by changing the magnetic bias field. This effect offers a way of minimising the radar visibility of microstrip antennas and arrays.
openaire +1 more source
3D Printing of Stretchable, Compressible and Conductive Porous Polyurethane for Soft Robotics
Advanced Materials Technologies, EarlyView.A 3D‐printable porous dopamine‐polyurethane acrylate elastomer results in conductive, stretchable, and compressible structures that can be metallized in situ through catechol‐mediated silver reduction. The resulting material function as both compliant soft robot with a and strain sensors without complex assemblies, enabling fully 3D‐printed soft ...
Ouriel Bliah +3 more
wiley +1 more source
Surveying sea surface effect in satellite altimeter-derived wind speed
International Journal of Coastal and Offshore Engineering, 2016 To improve sea surface wind speed in coastal regions, we used nadir satellite altimeter measurements in the Persian Gulf and Arabian Sea. With combining normalized radar cross section for two bands of satellite altimeter measurements and significant wave
Hossein Farjami +2 more
doaj
A Wind Speed Retrieval Model for Sentinel-1A EW Mode Cross-Polarization Images
Remote Sensing, 2019 In contrast to co-polarization (VV or HH) synthetic aperture radar (SAR) images, cross-polarization (CP for VH or HV) SAR images can be used to retrieve sea surface wind speeds larger than 20 m/s without knowing the wind directions.
Yuan Gao +3 more
doaj +1 more source