Results 111 to 120 of about 5,383 (243)

Simultaneous HF‐radar and DMSP observations of the cusp

Geophysical Research Letters, 1990
The Geospace Environment Modeling (GEM) Program is directed toward modeling the coupled solar wind/magnetosphere/ionosphere system. The inter‐calibration of ground‐based observations of the ionosphere and satellite observations has been identified as an essential step in tying together the data to produce a global picture of geospace.On October 10,1988
Baker, K.B., Greenwald, R.A., Ruohoniemi, J.M., Dudeney, J.R., Pinnock, M., Newell, P. T., Greenspan, M.E., Meng, C.-I.   +7 more
openaire   +2 more sources

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, Volume 36, Issue 47, 11 June 2026.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

Miniaturisation of high-frequency SURFACE wave radar transmitting antenna

The Journal of Engineering, 2019
Antennas operating in the high-frequency (HF) bands are generally relatively large in size, which severely limits the application of the antennas. Therefore, miniaturisation of the antenna is necessary.
Hong-Bo Li, Yang Song, Chang-Jun Yu
doaj   +1 more source

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, Volume 38, Issue 32, 8 June 2026.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

Construction of sea surface current vectors using a single HF radar: A theoretical study. [PDF]

iScience, 2022
Shi J, Chen X, Li X, Chen P, Shao Q.
europepmc   +1 more source

2D Materials Empowered Radar Absorbing Materials: A Review

Advanced Electronic Materials, Volume 12, Issue 12, 22 June 2026.
Recent progress in 2D materials empowered radar absorbing materials (RAMs) is reviewed, highlighting four key structural design strategies that enhance electromagnetic wave absorption. Porous structures, heterogeneous interfaces, printed metamaterials, and tunable metasurfaces are compared in terms of their governing physics, fabrication complexity ...
Yujie Zhong, Shuncong Zhong, Yi Huang, Shan‐Tung Tu, Minghong Wu   +4 more
wiley   +1 more source

A bistatic HF radar for surface current mapping

IEICE Electronics Express, 2010
This paper proposes a bistatic High Frequency Surface Wave Radar (HFSWR) system for ocean current mapping. This system is composed of two remote sites. Both receive backscattered echoes as well as bistatic echoes transmitted by the other. An experiment was conducted on the coast of the North China Sea during January 2010, which proved effectiveness of ...
Jing Yang 0036, Biyang Wen, Chong Zhang, Xiaojing Huang 0001, Zhisheng Yan, Wei Shen   +5 more
openaire   +2 more sources

A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions [PDF]

, 2007
The Super Dual Auroral Radar Network (SuperDARN) has been operating as an international co-operative organisation for over 10 years. The network has now grown so that the fields of view of its 18 radars cover the majority of the northern and southern ...
M. P. Freeman, Sofko, G.J., P. L. Dyson, Ruohoniemi, J. M., Kikuchi, T., J. M. Ruohoniemi, Chisham, G., Walker, A.D.M., Dyson, P. L., R. A. Greenwald, G. J. Sofko, Milan, S.E., T. K. Yeoman, M. Pinnock, J.-P. Villain, Freeman, M. P., A. Grocott, Rash, J.P.S., Sato, N., Yeoman, T. K., Freeman, M.P., Bristow, W.A., Milan, S. E., K. A. McWilliams, N. Sato, Lester, M., Villain, J.-P., Greenwald, R.A., G. Chisham, Bristow, W. A., A. D. M. Walker, Grocott, A., Mcwilliams, K. A., M. Lester, Pinnock, M., Dyson, P.L., Walker, A. D. M., McWilliams, K.A., T. Kikuchi, S. E. Milan, Ruohoniemi, J.M., Greenwald, R. A., Sofko, G. J., J. P. S. Rash, Rash, J. P. S., W. A. Bristow, Yeoman, T.K.   +46 more
core   +1 more source

Endothelial Integrin‐Linked Kinase (ILK) Deficiency Promotes Endothelial Activation and Cardiovascular Dysfunction via Receptor Interacting Protein Kinase‐1 (RIPK1) Enriched‐Extracellular Vesicle Signalling

Journal of Extracellular Vesicles, Volume 15, Issue 6, June 2026.
Endothelial ILK loss drives RIPK1‐enriched EVs that propagate systemic endothelial activation and cardiovascular remodelling. EV cargo remodelling induces early endothelial injury, microvascular dysfunction and chronic cardiac alterations through a RIPK1 dependent pathway.
Alberto Cook‐Calvete, María Delgado‐Marín, Sara Jorquera Ortega, Silvia Moreta, Mercedes Castro‐Pinto, José López‐Menendez, Blanca Rodríguez‐Fernandez, Julia García‐García, Carlos Zaragoza, Marta Saura   +9 more
wiley   +1 more source

Digital radio and its application in the HF (2-30 MHz) band [PDF]

, 2004
The propagation environment at high frequencies (HF, 2-30 MHz) has a significant impact on the performance of radio systems (especially data communications).
Davies, Nigel Clement
core