Results 11 to 20 of about 62,511 (247)

An electron backscatter diffraction study of geesops: a broader view of trilobite vision? [PDF]

open access: yes, 2008
The calcite eyes of trilobites have been studied for over 100 years using methods including light microscopy (e.g. Clarke 1889; Campbell 1975; Towe 1973; Clarkson 1979 and Bruton and Haas 2003) and more recently cathodoluminescence (CL) imaging coupled ...
Torney, C., Lee, M.R., Owen, A.W.
core   +9 more sources

Investigation of the relationship between optical auroral forms and HF radar E region backscatter [PDF]

open access: yes, 2000
International audienceThe SuperDARN HF radars have been employed in the past to investigate the spectral characteristics of coherent backscatter from L-shell aligned features in the auroral E region.
Milan, S. E.   +16 more
core   +6 more sources

Effects of high-latitude atmospheric gravity wave disturbances on artificial HF radar backscatter [PDF]

open access: yes, 2006
International audienceObservations of HF radar backscatter from artificial field-aligned irregularities in an ionosphere perturbed by travelling disturbances due to atmospheric gravity waves are presented.
Tim K. Yeoman (7583066)   +14 more
core   +6 more sources

The influence of magnetospheric substorms on SuperDARN radar backscatter [PDF]

open access: yes, 2008
The SuperDARN ionospheric radar network is a leading tool for investigating the near-Earth space environment. However, reductions in ionospheric backscatter have been reported during magnetospheric substorms.
Wild, James A., Grocott, A.
core   +4 more sources

Optimizing electron backscatter diffraction of carbonate biominerals—resin type and carbon coating [PDF]

open access: yes, 2009
Electron backscatter diffraction (EBSD) is becoming a widely used technique to determine crystallographic orientation in biogenic carbonates. Despite this use, there is little information available on preparation for the analysis of biogenic carbonates ...
Perez-Huerta, A.   +5 more
core   +1 more source

Research Pathways of Forest Above-Ground Biomass Estimation Based on SAR Backscatter and Interferometric SAR Observations

open access: yesRemote Sensing, 2018
Estimation of forest biomass with synthetic aperture radar (SAR) and interferometric SAR (InSAR) observables has been surveyed in 186 peer-reviewed papers to identify major research pathways in terms of data used and retrieval models.
Maurizio Santoro, Oliver Cartus
doaj   +1 more source

Smart Face Mask with an Integrated Heat Flux Sensor for Fast and Remote People’s Healthcare Monitoring

open access: yesSensors, 2021
The COVID-19 pandemic has highlighted a large amount of challenges to address. To combat the spread of the virus, several safety measures, such as wearing face masks, have been taken.
Marc Lazaro   +3 more
doaj   +1 more source

How Do Continuous High-Resolution Models of Patchy Seabed Habitats Enhance Classification Schemes?

open access: yesGeosciences, 2019
Predefined classification schemes and fixed geographic scales are often used to simplify and cost-effectively map the spatial complexity of nature.
Gustav Kågesten   +3 more
doaj   +1 more source

Improving the Estimation of Water Level over Freshwater Ice Cover using Altimetry Satellite Active and Passive Observations

open access: yesRemote Sensing, 2020
Owing to its temporal resolution of 10-day and its polar orbit allowing several crossings over large lakes, the US National Aeronautics and Space Administration (NASA) and the French Centre National d’Etudes Spatiales (CNES) missions including Topex ...
Jawad Ziyad   +4 more
doaj   +1 more source

RFID Backscatter Based Sport Motion Sensing Using ECOC-Based SVM

open access: yesSensors, 2023
With the advent of the 5G era, radio frequency identification (RFID) has been widely applied in various fields as one of the key technologies for the Internet of Things (IoT) to realize the Internet of Everything (IoE). In recent years, RFID-based motion
Lei Han, Xia Hua
doaj   +1 more source

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