Results 101 to 110 of about 817,854 (220)

Validating HF Radar Current Accuracy via Lagrangian Measurements and Radar-to-Radar Comparisons in Highly Variable Surface Currents

Remote Sensing
The validation of HF radar systems remains an area with significant scope for advancement, particularly in terms of linking data quality with system operational parameters, fully utilizing the potential of redundant data (e.g., overlapping radial ...
Bartolomeo Doronzo, Michele Bendoni, Stefano Taddei, Angelo Boccacci, Carlo Brandini   +4 more
doaj   +1 more source

Application of HF Radar in Hazard Management

International Journal of Antennas and Propagation, 2016
A review is given of the impact that HF radars are having on the management of coastal hazards. Maps of surface currents can be produced every 10–20 minutes which, in real time, improve navigation safety in restricted areas commonly found near ports and ...
Mal Heron, Roberto Gomez, Bernd Weber, Anna Dzvonkovskaya, Thomas Helzel, Nicolas Thomas, Lucy Wyatt   +6 more
doaj   +1 more source

Burrow use by Saharan striped polecat (Poecilictis libyca) in an agricultural area of central Tunisia

The Journal of Wildlife Management, Volume 90, Issue 8, November 2026.
Saharan striped polecats in agricultural landscapes use many burrows (30–35 per season), facilitated by sandy soils. Burrow sharing is rare and mainly occurs between males and females during mating. Habitat use shifts seasonally, reflecting disturbance and soil conditions. Maintaining stable sandy habitats may be critical for persistence.
Firas Hayder, Zimkitha J. K. Madikiza, Emmanuel Do Linh San   +2 more
wiley   +1 more source

Advances in High‐Temperature Microwave‐Absorbing Materials With Rare Metals: Preparations, Classifications, and Strategies

Rare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT High‐temperature microwave‐absorbing materials (HTMAMs) are vital for the electromagnetic stealth of hypersonic aircraft and aerospace engines. Traditional carbon‐based or magnetic‐based absorbers suffer from oxidation, Curie‐temperature limitations, and impedance mismatch under extreme conditions.
Jing Wu, Lingfeng Yuan, Lurui Bai, Zewen Duan, Biao Zhao, Ruopeng Cui, Chunlei Wan   +6 more
wiley   +1 more source

An interhemispheric, statistical study of nightside spectral width distributions from coherent HF scatter radars [PDF]

, 2002
International audienceA statistical investigation of the Doppler spectral width parameter routinely observed by HF coherent radars has been conducted between the Northern and Southern Hemispheres for the nightside ionosphere.
Milan, S. E., N. Sato, Woodfield, E.E., Lester, M., M. Lester, N. Sato (7606136), Milan, S.E., M. Lester (7589660), K. Hosokawa, S. E. Milan, K. Hosokawa (7606139), Hosokawa, K., E. E. Woodfield (7590071), E. E. Woodfield, Sato, N., S. E. Milan (7594526), Woodfield, E. E.   +16 more
core   +2 more sources

Do Shallow Slip Deficits Reflect Fault Structural Maturity or Modeling Choices? A Comparative Analysis of Tibetan Strike‐Slip Earthquakes

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 11, November 2026.
Abstract InSAR‐constrained finite fault slip models are often used to characterize fault geometries and slip distributions of large continental earthquakes. A common feature of these models is a decrease in slip near the surface, commonly expressed as a percentage shallow slip deficit (SSD).
É. Gaudreau, E. Nissen, J. Liu
wiley   +1 more source

On the factors controlling occurrence of F-region coherent echoes [PDF]

, 2002
International audienceSeveral factors are known to control the HF echo occurrence rate, including electron density distribution in the ionosphere (affecting the propagation path of the radar wave), D-region radio wave absorption, and ionospheric ...
T. Ogawa, S. Nozawa, A. V. Koustov, D. Andre (7667897), Milan, S.E., D. W. Danskin, Nozawa, S., T. Ogawa (4008053), S. E. Milan (7594526), N. Nishitani, D. Andre, Milan, S. E., Lester, M., S. Nozawa (7672178), D. W. Danskin (7613489), N. Nishitani (7672181), Danskin, D. W., Ogawa, T., M. Lester, A. V. Koustov (7613492), M. Lester (7589660), Andre, D., S. E. Milan, Koustov, A.V., Koustov, A. V., Nishitani, N., Danskin, D.W.   +26 more
core   +2 more sources

Global Ionospheric Responses to Four X‐Class Solar Flares in November 2025

Space Weather, Volume 24, Issue 11, November 2026.
Abstract We investigate global ionospheric responses to four X‐class solar‐disk flares that occurred in November 2025 from the same solar active region, using multi‐instrument observations including GNSS, ionosonde, geomagnetic and GOES solar irradiance data. Pronounced dayside TEC enhancements are observed for three flares (#2 X1.2, #3 X5.1, and #4 X4.
Lei Liu, Shasha Zou
wiley   +1 more source

Covalent Organic Frameworks in Smart Food Packaging: Advances, Challenges, and Future Prospects

Comprehensive Reviews in Food Science and Food Safety, Volume 25, Issue 6, November 2026.
ABSTRACT Food preservation challenges have positioned packaging as a rapidly evolving, innovation‐driven field, with smart packaging offering transformative solutions. Among advanced materials, covalent organic frameworks (COFs) have attracted growing attention due to their permanent porosity, structural tunability, high surface area, and chemical ...
Sara Esteghlal, Hossein Daneshgar, Navid Rabiee, Mohammadreza Khalesi   +3 more
wiley   +1 more source

DEDNet: Offshore Eddy Detection and Location with HF Radar by Deep Learning. [PDF]

Sensors (Basel), 2020
Liu F, Zhou H, Wen B.
europepmc   +1 more source