Results 81 to 90 of about 4,057 (212)
Magnetic Resonance in Medicine, Volume 94, Issue 6, Page 2421-2434, December 2025.Abstract Purpose There is a clinical need for stiffness mapping of the heart; however, current cardiac magnetic resonance elastography (cMRE) has limited spatiotemporal resolution. Therefore, we developed 2D spiral multifrequency MRE of the human heart and conducted a study to analyze the consistency and reproducibility of motion‐encoding and stiffness
Matthias S. Anders +14 more
wiley +1 more source
Авіаційно-космічна техніка та технологія, 2018 The article presented results of researches conducted by the team of authors devoted to the possibilities of creation for the first time in Ukraine the real prerequisites for solving the fundamental problem of constructing digital telecommunication ...
Гліб Леонідович Авдєєнко +2 more
doaj +1 more source
Terahertz Holographic Image Encryption via Thermally Tunable Directional Janus Metasurface
SmartMat, Volume 6, Issue 6, December 2025.The Janus metasurface that can simultaneously control three DOFs (propagation direction, frequency, and temperature) is designed by Bi‐DNN. The Janus metasurface realizes high‐quality eight‐channel holographic imaging and information encryption functions.
Lingyun Zhu +3 more
wiley +1 more source
International Journal of Antennas and Propagation, 2019 This paper addresses the issues of low bandwidth, gain, and efficiency of miniaturized microwave antennas by proposing a novel wideband dual-frequency coplanar waveguide antenna design based on a simplified composite right/left-handed (SCRLH ...
Tianpeng Li +5 more
doaj +1 more source
, 2013 This paper reports very-long-baseline interferometry observations of the radio-loud broad absorption line (BAL) quasar J1020+4320 at 1.7, 2.3, 6.7, and 8.4 GHz using the Japanese VLBI network (JVN) and European VLBI network (EVN). The radio morphology is
Asada, Keiichi +16 more
core +1 more source
Small Science, Volume 5, Issue 12, December 2025.Electrochemical impedance spectroscopy‐based label‐free biosensors offer rapid, direct, and sensitive analyte detection by measuring impedance changes in real time. Innovations in nanoengineered electrode surfaces and biorecognition elements have enhanced their performance facilitating point‐of‐care applications, despite ongoing challenges in ...
Nandhinee Radha Shanmugam +4 more
wiley +1 more source
Fusion of Multifrequency GPR Data Freed From Antenna Effects
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2018 Several data fusion approaches have been developed to optimize both resolution and characterization depth for multifrequency ground-penetrating radar (GPR). In this study, we propose a novel physically based method to merge radar data coming from antennas operating in different frequency ranges.
Alberic De Coster, Sebastien Lambot
openaire +2 more sources
Target DoA estimation in passive radar using non-uniform linear arrays and multiple frequency channels [PDF]
, 2018 In this paper we present a robust approach for target direction of arrival (DoA) estimation in passive radar that jointly exploits spatial and frequency diversity. Specifically we refer to a DVB-T based passive radar receiver equipped with a linear array
Cardinali, Roberta +3 more
core +1 more source
Detection of Buried Inhomogeneous Elliptic Cylinders by a Memetic Algorithm [PDF]
, 2003 The application of a global optimization procedure to the detection of buried inhomogeneities is studied in the present paper. The object inhomogeneities are schematized as multilayer infinite dielectric cylinders with elliptic cross sections.
Caorsi, Salvatore +4 more
core +3 more sources
Microwave spectroscopy of the active sun [PDF]
In studies of solar active regions and bursts, the ability to obtain spatially resolved radio spectra (brightness temperature spectra) opens a whole new range of possibilities for study of the solar corona.
Hurford, Gordon
core +1 more source