Results 31 to 40 of about 228,651 (326)
Theoretical model for the transmittance in a left-handed metamaterial of different geometries [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2023 In this work, a theoretical model for the transmittance in a left-handed metamaterial of different geometries is presented. The proposed unit cells are a combination of conducting wires of rectangular cross-section with square-ring and hexagonal ...
Héctor Lorduy G, Ángel Salazar
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High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays [PDF]
, 2016 A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we demonstrate a metasurface device that circumvents these limitations.
Aieta, Francesco +11 more
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Polynomial effective equidistribution
Comptes Rendus. Mathématique, 2023 We prove effective equidistribution theorems, with polynomial error rate, for orbits of the unipotent subgroups of $\mathrm{SL}_2(\mathfrak{l})$ in arithmetic quotients of $\mathrm{SL}_2(\mathbb{C})$ and $\mathrm{SL}_2(\mathfrak{l})\times \mathrm{SL}_2 ...
Lindenstrauss, Elon +2 more
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Aerospace, 2023 Studies on the geometry variation-related compressor uncertainty quantification (UQ) have often used dimension reduction methods, such as the principal component analysis (PCA), for the modeling of deviations.
Mingzhi Li +4 more
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Method for fast determination of the angle of ionizing radiation incidence from data measured by a Timepix3 detector [PDF]
Journal of Sensors and Sensor Systems, 2021 This paper presents a method of how to determine spatial angles of ionizing radiation incidence quickly, using a Timepix3 detector. This work focuses on the dosimetric applications where detectors and measured quantities show significant angle ...
F. Lehner +8 more
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Incidences between points and lines in three dimensions [PDF]
, 2015 We give a fairly elementary and simple proof that shows that the number of incidences between $m$ points and $n$ lines in ${\mathbb R}^3$, so that no plane contains more than $s$ lines, is $$ O\left(m^{1/2}n^{3/4}+ m^{2/3}n^{1/3}s^{1/3} + m + n\right) $$
Sharir, Micha, Solomon, Noam
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The Journal of Engineering, 2019 To realise wide-band stealth of radar absorbing material, a special-shaped honeycomb radar absorbing structure within nested cone-shaped scattering configuration is designed.
Wang Ming-liang +9 more
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Double Sided Band-pass Frequency Selective Surface Based on Matryoshka Geometry [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThis paper describes the development of a double-sided band-pass frequency selective surface based on Matryoshka geometry, preserving features such as miniaturization, multiband operation and stability of polarization and angle of incidence.
Marina de O. Alencar +3 more
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Matroid Enumeration for Incidence Geometry [PDF]
Discrete & Computational Geometry, 2011 Matroids are combinatorial abstractions for point configurations and hyperplane arrangements, which are fundamental objects in discrete geometry. Matroids merely encode incidence information of geometric configurations such as collinearity or coplanarity, but they are still enough to describe many problems in discrete geometry, which are called ...
David Bremner +3 more
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Factorizations in Geometric Lattices
AxiomsThis article investigates atomic decompositions in geometric lattices isomorphic to the partition lattice Π(X) of finite set X, a fundamental structure in lattice theory and combinatorics.
Alex Aguila +2 more
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