scholarly journals Free-Space Subterahertz-Field Polarization Controlled by Selection of Waveguide Modes

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Marc Westig ◽  
Holger Thierschmann ◽  
Allard Katan ◽  
Matvey Finkel ◽  
Teun M. Klapwijk
Keyword(s):  
Free Space ◽  
Field Polarization ◽  
Waveguide Modes ◽  
Selection Of

scholarly journals Predicting Tomato Seedling Morphology by X-ray Analysis of Seeds

1994 ◽  
Vol 119 (2) ◽  
pp. 258-263 ◽  
Author(s):  
W.J. van der Burg ◽  
J.W. Aartse ◽  
R.A van Zwol ◽  
H. Jalink ◽  
R.J. Bino
Keyword(s):  
Free Space ◽  
Evaluation Procedure ◽  
Germination Test ◽  
High Quality ◽  
Seedling Morphology ◽  
Tomato Seedling ◽  
X Ray ◽  
Size And Morphology ◽  
Selection Of

Studies based on X-ray photographs were conducted to predict the morphology of tomato (Lycopersicon esculentum Mill.) seedlings at transplanting stage. Currently, seed-lot quality of tomato seeds for growing commercial transplants is determined with grow-out tests in the greenhouse because the standard germination test fails to predict the percentage of normal or usable transplants (UTs). These grow-out tests, however, are difficult to standardize. An X-ray evaluation procedure is presented as an alternative. X-ray images nondestructively provide information on embryo size and morphology and the amount of endosperm and the area of free space. These parameters correlate well with the morphology of 14-day old seedlings. Cotyledon morphology has the highest correlation with the percentage of UTs. A test based on the evaluation of X-ray images, classifying the cotyledon morphology and seed free space, predicts the percentage of UTs more accurately than the currently used germination test. A second method based on an equation that uses the probabilities of all X-ray categories proportionally predicts the percentage of UTs of primed seeds more accurately than the first method. Selecting individual seeds based on X-ray images has the potential to raise the percentage of UTs of seed lots. On the average, the percentage of UTs of control seeds was 22% higher after hand selection based on X-ray evaluation. Primed seeds gave 12% higher results. Hence, X-ray analysis can predict seedling performance and enable the selection of high-quality seeds.

scholarly journals Латеральный спин-волновой транспорт в системе неидентичных магнонно-кристаллических микроволноводов

2021 ◽  
Vol 63 (9) ◽  
pp. 1330
Author(s):  
В.А. Губанов ◽  
С.Е. Шешукова ◽  
А.В. Садовников
Keyword(s):  
Signal Processing ◽  
Bragg Resonance ◽  
Brillouin Spectroscopy ◽  
Power Dividers ◽  
Frequency Selection ◽  
Waveguide Modes ◽  
Micromagnetic Modeling ◽  
Magnonic Crystals ◽  
Magnonic Crystal ◽  
Selection Of

The control regimes of dipole coupling in the lateral system of non-identical magnonic crystals are investigated by the method of Mandelstam-Brillouin spectroscopy and by the method of micromagnetic modeling. The modes of spatial and frequency selection of the spin-wave signal near the frequency of the band gap zone of the magnonic crystal are revealed. The influence of changes in geometric parameters on the properties of waveguide modes near the frequency of the Bragg resonance is investigated. The results obtained can be used to create microwave signal processing devices, such as demultiplexers, power dividers, couplers.

scholarly journals Propagation of Airy-Hermite-Gaussian waveguide modes in free space

1984 ◽  
Vol 23 (1) ◽  
pp. 48 ◽  
Author(s):  
Jonathan G. Grossman ◽  
Lee W. Casperson ◽  
Oscar M. Stafsudd ◽  
Leroy V. Sutter
Keyword(s):  
Free Space ◽  
Waveguide Modes

Selection of suitable wavelengths for the dual-wavelength model of free space optics (FSO) systems for high-speed trains

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Abhijot kaur ◽  
Neeraj Sharma ◽  
Jatinder Singh
Keyword(s):  
Free Space ◽  
Communication Systems ◽  
High Speed ◽  
Dual Wavelength ◽  
Free Space Optics ◽  
Radio Communication ◽  
Modulation Formats ◽  
Space Optics ◽  
High Speed Trains ◽  
Selection Of

AbstractFree space optics (FSO) can be used as an alternative to the currently used wireless radio communication systems to meet the increasing demands for the uninterrupted internet connection in High-Speed Trains (HSTs). FSO is less prone to interference, license-free and more secure as compared to Radio Frequency (RF) technology. In this paper, we have compared three different wavelengths (850, 1330, and 1550 nm) for the dual-wavelength model at a bit rate of 10 Gb/s to see which two wavelengths provide better results. The system is studied for return to zero (RZ) and non-return to zero (NRZ) modulation formats this electronic document is a “live” template and already defines the components of your paper [title, text, heads, etc.] in its style sheet.

scholarly journals Optical nano-antennae as compact and efficient couplers from free-space to waveguide modes

2015 ◽  
Author(s):  
Andrei Andryieuski ◽  
Vladimir Zenin ◽  
Radu Malureanu ◽  
Valentyn Volkov ◽  
Sergey I. Bozhevolnyi ◽  
...  
Keyword(s):  
Free Space ◽  
Waveguide Modes
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