Results 51 to 60 of about 870,817 (352)

Phased Arrays for Radio Astronomy, Remote Sensing, and Satellite Communications

, 2018
Discover a modern approach to the analysis, modeling and design of high sensitivity phased arrays. Network theory, numerical methods and computational electromagnetic simulation techniques are uniquely combined to enable full system analysis and design ...
K. Warnick, R. Maaskant, M. Ivashina, D. Davidson, B. Jeffs   +4 more
semanticscholar   +1 more source

Radio Astronomy and the Radio Regulations [PDF]

Symposium - International Astronomical Union, 2001
This article gives a brief introduction to the status of radio astronomy within the International Telecommunication Union (ITU), the body which coordinates global telecommunications. Radio astronomy entered the ITU arena in 1959 as a relative latecomer.
openaire   +1 more source

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

Fast Neutron Detector Based on Hybrid 2D Perovskite Thin Films

Advanced Functional Materials, EarlyView.
This work presents the direct detection of fast neutrons using flexible hybrid 2D perovskite (PEA2PbBr4) thin‐film detectors. Thanks to their high low‐Z elements content and good charge transport, these materials enable efficient neutron detection. The thin film configuration allowed the operation at low voltage, and offer scalability, flexibility, and
Ilaria Fratelli, Felix Pino, Laura Basiricò, Giulia Napolitano, Jessica Carolina Delgado, Sara Cepić, Andrea Ciavatti, Sandra Moretto, Gianluigi Maggioni, Marco Cinausero, Sara Maria Carturan, Beatrice Fraboni   +11 more
wiley   +1 more source

Al1‐xScxN‐Based Ferroelectric Domain‐Wall Memristors

Advanced Functional Materials, EarlyView.
(a) Conductive atomic force microscopy (CAFM) image of the initial state bidomain structure of the Al0.85Sc0.15N (a) showing an enhanced conductivity of the head‐to‐head domain boundary. (b) CAFM image of the same area after application of several −65 V, 1 s voltage pulses showing lower conductivity of the generated tail‐to‐tail domain walls.
Haidong Lu, Georg Schönweger, Niklas Wolff, Ziming Ding, Adrian Petraru, Isabel Streicher, Hermann Kohlstedt, Christian Kübel, Stefano Leone, Lorenz Kienle, Simon Fichtner, Alexei Gruverman   +11 more
wiley   +1 more source

SEASONAL VARIATIONS OF THE IONOSPHERE SCINTILLATIONS PARAMETERS OBTAINED FROM THE LONG OBSERVATIONS OF THE POWER COSMIC RADIO SOURCES AT THE DECAMETER WAVE RANGE

Odessa Astronomical Publications, 2016
Observations of the four power cosmic radio sources were carried out on the radio telescope (RT) URAN-4 during 1987-1990 and 1998-2007 at the frequencies 20 and 25 MHz.
O. A. Lytvynenko, S. K. Panishko
doaj   +1 more source

Polygon “Simeiz-Katsively” - study of changes in the geodynamic, heliogeophysical and climatic characteristics of Crimea [PDF]

ITM Web of Conferences, 2019
The solution to the problem of forecasting catastrophic natural and technological phenomena in Crimea is associated with the organization of complex observations in a network of local geodynamic polygons. Currently conducted on-site observations involved
Volvach Alexander, Kurbasova Galina, Dmytrotsa Andrej, Neyachenko Dmitry, Kanonidi Konstantin, Boborykina Olga   +5 more
doaj   +1 more source

A Radio Astronomy Search for Cold Dark Matter Axions [PDF]

, 2017
The search for axions has gained ground in recent years, with laboratory searches for cold dark matter (CDM) axions, relativistic solar axions, and ultra-light axions as the subject of extensive literature.
K. Kelley, P. Quinn
semanticscholar   +1 more source

Techniques of Radio Astronomy [PDF]

, 2013
This chapter provides an overview of the techniques of radio astronomy. This study began in 1931 with Jansky's discovery of emission from the cosmos, but the period of rapid progress began fifteen years later. From then to the present, the wavelength range expanded from a few meters to the sub-millimeters, the angular resolution increased from degrees ...
openaire   +3 more sources

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source