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Spatial and Directional Modulation Systems for Near-Field Secure Transmission [PDF]

Sensors
The proliferation of massive antenna arrays and the consequent intensification of near-field effects with 6G necessitate addressing critical security challenges in near-field communication environments.
Ji Liu, Yuan Zhong, Yong Wang, Dong Gong, Yue Xiao   +4 more
doaj   +2 more sources

RR Lyrae Stars as Seen by the Kepler Space Telescope

Frontiers in Astronomy and Space Sciences, 2021
The unprecedented photometric precision along with the quasi-continuous sampling provided by the Kepler space telescope revealed new and unpredicted phenomena that reformed and invigorated RR Lyrae star research.
Emese Plachy, Emese Plachy, Emese Plachy, Róbert Szabó, Róbert Szabó, Róbert Szabó   +5 more
doaj   +1 more source

The Effect of Diet Planning on Hemoglobin A1c in Type 2 Diabetes Mellitus Patients: A Sample from the UNRWA Clinic in Gaza Field

Proceedings, 2023
Patients with type 2 diabetes mellitus (T2DM) may need proper counselling to bring about a real change in their lifestyle regarding a proper food intake, proper weight reduction, management of hemoglobin A1c (HbA1c), and commitment to intake drugs.
Sahar M. Abuhajar
doaj   +1 more source

Quantitative Modeling of Near-Field Interactions in Terahertz Near-Field Microscopy

Applied Sciences, 2023
Terahertz scattering-scanning near-field optical microscopy (THz s-SNOM), combining the best features of terahertz technology and s-SNOM technology, has shown unique advantages in various applications.
Zhaomin Peng, Dehai Zhang, Shuqi Ge, Jin Meng   +3 more
doaj   +1 more source

Social determinants and mental health needs of Palestine refugees and UNRWA responses in Gaza during the COVID-19 pandemic: a qualitative assessment

BMC Public Health, 2022
Background Due to pre-existing difficulties, refugees are especially susceptible to the negative effects of the pandemic; nonetheless, the pandemic’s effect on this group is still unclear.
Zeina Jamal, Zoheir ElKhatib, Shatha AlBaik, Masako Horino, Mohammed Waleed, Farah Fawaz, Giulia Loffreda, Akihiro Seita, Sophie Witter, Karin Diaconu   +9 more
doaj   +1 more source

Semantic Comprehension of Questions in Q&A System for Chinese Language Based on Semantic Element Combination

IEEE Access, 2020
Question understanding is an extremely important part of the question and answer (Q&A) system, which is the basis of subsequent information retrieval and answer extraction.
Jiaxing Song, Feilong Liu, Kai Ding, Kai Du, Xiaonan Zhang   +4 more
doaj   +1 more source

Fourier Compatible Near-Field Multiple-Input Multiple-Output Terahertz Imaging With Sparse Non-Uniform Apertures

IEEE Access, 2021
Among image reconstruction methods, Fourier transform-based techniques provide computationally better performance. However, conventional Fourier-based reconstruction techniques require uniform data sampling at the radar aperture.
Amir Masoud Molaei, Shaoqing Hu, Vasiliki Skouroliakou, Vincent Fusco, Xiaodong Chen, Okan Yurduseven   +5 more
doaj   +1 more source

A Wavelet-Based Time-Frequency Analysis on the Supersonic Jet Noise Features with Chevrons

Fluids, 2022
A detailed investigation of the statistical properties of the near-field pressure fluctuations induced by an under-expanded jet, by varying the nozzle exit shapes has been presented. Experiments using different convergent Chevron nozzles were carried out
Stefano Meloni, Hasan Kamliya Jawahar
doaj   +1 more source

Coherence-Factor-Based Rough Surface Clutter Suppression for Forward-Looking GPR Imaging

Remote Sensing, 2020
We present an enhanced imaging procedure for suppression of the rough surface clutter arising in forward-looking ground-penetrating radar (FL-GPR) applications.
Davide Comite, Fauzia Ahmad, Traian Dogaru, Moeness Amin   +3 more
doaj   +1 more source

Multiple Reflections and the Near-Field Effects on a Metamaterial Quarter-Wave Plate

Applied Sciences, 2023
Metamaterial-based quarter-wave plates (QWPs) have emerged as promising candidates for advanced polarization control in a variety of optical applications, owing to their unique properties, such as ultra-thin profiles and tailored spectral responses.
James Davis, Durdu Güney
doaj   +1 more source