Results 51 to 60 of about 876,327 (353)
Odessa Astronomical Publications, 2014 Growth of local area network Observatory associated with employee needs to access network resources has led to an increase in the number of computing and network devices. Until recently, we tested performance of these systems excellent manual and most of
D. V. Dumsky +8 more
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A Design Study of the 400MHz Wide-Band Digital Autocorrelation Spectrometer [PDF]
Journal of Astronomy and Space Sciences, 2002 In this paper, we performed the design study of a wide-band digital autocorrelation spectrometer for the observation study of an extra-galaxy's spectral lines and the survey research of the special radio sources in field of the radio astronomy ...
C. H. Lee +6 more
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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
A Compact In-Line Waveguide-to-Microstrip Transition in the Q-Band for Radio Astronomy Applications
, 2018 A microstrip-to-waveguide transition has been realized for radio astronomy applications, designed to operate in the Q-band (33–50 GHz). As part of an array radio frequency (RF) receiver, the main requirement of such a transition is the reduction of ...
M. Simone +5 more
semanticscholar +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 +11 more
wiley +1 more source
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 +3 more
wiley +1 more source
Chemo‐Mechanical Coupling in Hydrogels: Dynamics in the Diffusion‐Limited Regime
Advanced Functional Materials, EarlyView.A time‐dependent continuum model is developed to capture the transient swelling dynamics of chemo‐mechanical hydrogels. By coupling chemical reactions, solvent transport, and polymer deformation, volume phase transitions, reaction kinetics, and transient mechanical instabilities are analyzed.
Yao Xiong +2 more
wiley +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
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
Ferroelectricity in Single‐Crystalline BaTiO3 Nanodisks on Silicon
Advanced Functional Materials, EarlyView.Ferroelectricity is studied in 20 nm thick single crystalline BaTiO3 nanodisks when scaling their diameter from ≈ 400 down to 100 nm. For 100 nm diameter, the vertical polarization component adopts three distinct patterns, and the lateral one shows a rotational invariance in‐plane, suggesting a combination of center‐type and flux‐closure domains.
Ibukun Olaniyan +9 more
wiley +1 more source