Results 1 to 10 of about 9,846,278 (313)

RR Lyrae Stars as Seen by the Kepler Space Telescope

open access: yesFrontiers 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   +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

open access: yesProceedings, 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

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

open access: yesBMC 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   +9 more
doaj   +1 more source

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

open access: yesIEEE 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   +4 more
doaj   +1 more source

Modeling of Subwavelength Gratings: Near-Field Behavior

open access: yesPhotonics, 2023
Subwavelength gratings have received considerable attention in the fields of photonics, optoelectronics, and image sensing. This paper presents simple analytical expressions for the near-field intensity distribution of radiation scattered by these ...
Alexander Chernyavsky   +3 more
doaj   +1 more source

Evolution of an optical vortex with initial fractional topological charge [PDF]

open access: yesКомпьютерная оптика, 2021
In a number of theoretical (J. Opt. 6, 259 (2004)) and experimental (Opt Express 19, 5760 (2011)) works, an original fractional-TC optical vortex (with TC standing for topological charge) was shown to evolve into an integer optical vortex whose TC is ...
V.V. Kotlyar , A.G. Nalimov
doaj   +1 more source

Array Optimization for Maximum Beam Collection Efficiency to an Arbitrary Receiving Plane in the Near Field

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
In this article, an array optimization method for maximizing beam collection efficiency (BCE) to an arbitrary receiving plane in the near field is proposed.
Seishiro Kojima   +2 more
doaj   +1 more source

Micro Non-Uniform Linear Array (MNULA) for Ultrasound Plane Wave Imaging

open access: yesSensors, 2021
Ultrasound plane wave imaging technology has been applied to more clinical situations than ever before because of its rapid imaging speed and stable imaging quality.
Yujia Tang   +5 more
doaj   +1 more source

Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils

open access: yesEnergies, 2023
In this paper was analysed a wireless power transfer system (WPT) with multiple resonators supplying, for example, sensors or LED lighting. Energy is transferred simultaneously using a group of identical planar spiral circular coils acting as ...
Jacek Maciej Stankiewicz
doaj   +1 more source

Temporally and Spatially Resolved Reflected Overpressure Measurements in the Extreme Near Field

open access: yesSensors, 2023
The design of blast-resistant structures and protective systems requires a firm understanding of the loadings imparted to structures by blast waves. While empirical methods can reliably predict these loadings in the far field, there is currently a lack ...
Andrew D. Barr   +4 more
doaj   +1 more source

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