Results 61 to 70 of about 4,315,310 (343)

Design and analysis antennas of transverse polarization on the dielectric waveguide

EURASIP Journal on Wireless Communications and Networking
This paper addresses the issue of constructing millimeter band antennas using dielectric waveguide structures. A new type of linear antenna, incorporating metal pins on the side walls of the grooved dielectric waveguide, is proposed for generating ...
Mohamed N. Shaaban, Aydar R. Nasybullin, Yuri E. Sedelnikov   +2 more
doaj   +1 more source

Radio: Radio ONU inicia servicio digital de noticias

Chasqui, 2007
Relata lo que ha sido la trayectoria de la Radio de la ONU fundada en 1946.
Laura Kwiatkowski
doaj   +1 more source

All photonic analogue to digital and digital to analogue conversion techniques for digital radio over fibre system applications [PDF]

, 2011
Copyright @ 2011 IEEEWideband electronic analogue to digital conversion (ADC) systems have critical problems encountered in high-frequency broadband communication systems that the recent electronic ADCs (EADC) have experienced those such as uncertainty ...
Abdollahi, SR, Al-Raweshidy, H, Mehdi Fakhraie, S, Nilavalan, R   +3 more
core  

Mean and Extreme Radio Properties of Quasars and the Origin of Radio Emission [PDF]

, 2015
We investigate the evolution of both the radio-loud fraction (RLF) and (using stacking analysis) the mean radio-loudness of quasars. We consider how these values evolve as a function of redshift and luminosity, black hole (BH) mass and accretion rate ...
Kratzer, Rachael M., Richards, Gordon T.
core   +1 more source

Digital Signal Modulation Classification With Data Augmentation Using Generative Adversarial Nets in Cognitive Radio Networks

IEEE Access, 2018
Automated modulation classification plays a very important part in cognitive radio networks. Deep learning is also a powerful tool that we could not overlook its potential in addressing signal modulation recognition problem.
Bin Tang, Ya Tu, Zhaoyue Zhang, Yun Lin
semanticscholar   +1 more source

Mitigation of Cracks in High‐Performance Nickel‐Based Superalloys in Powder Bed Fusion Laser Beam of Metals Using a Metal Matrix Composite Approach

Advanced Engineering Materials, EarlyView.
High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt, Maël Pontoreau, Christian Haase, Johannes‐Henrich Schleifenbaum   +3 more
wiley   +1 more source

Resource use of geriatric nurses due to documentation practices: A cross‐sectional study of applied recording techniques in nursing homes

Nursing Open, 2022
Aim To compare recent compliance cost estimates by nurses of German nursing homes who employ the new documentation approach structural model with those who use traditional documentation frameworks. Design A cross‐sectional survey.
Eugenia Larjow, Tobias Lingner
doaj   +1 more source

Galaxy Cluster Environments of Radio Sources

, 2011
Using the Sloan Digital Sky Survey (SDSS) and the FIRST (Faint Images of the Radio Sky at Twenty Centimeters) catalogs, we examined the optical environments around double-lobed radio sources. Previous studies have shown that multi-component radio sources
Abazajian, Ascasibar, Bahcall, Blanc, Blanton, Blanton, Blanton, Blanton, Blanton, Blanton, Bower, Bradač, Brodwin, Budavári, Burns, Clarke, Condon, Croft, Csabai, Daddi, Dalton, Deltorn, Dickinson, D’Onghia, Elizabeth L. Blanton, Fanaroff, Gal, Garilli, Gladders, Gladders, Gladders, Gómez, Ivezić, Jee, Joshua D. Wing, Koester, Koester, Krick, Lin, Lin, Lin, Lumsden, Martini, McMahon, Menanteau, Miller, Oklopčić, Ostrander, Owen, Oyaizu, Proctor, Reiprich, Roettiger, Sarazin, Schlegel, Smith, Smolčić, Vanderlinde, Vikhlinin, Voges, Wen, York, Zirbel, Zwicky   +63 more
core   +1 more source

Interferometry and Synthesis in Radio Astronomy [PDF]

, 2017
Preface to the Second Edition. Preface to the First Edition. Introduction and Historical Review. Introductory Theory of Interferometry and Synthesis Imaging. Analysis of the Interferometer Response. Geometric Relationships and Polarimetry.
Jacob Baars
semanticscholar   +1 more source

Novel Surface‐Based Bézier Metamaterials: A Higher Degree of Parametrization toward Tailoring the Effective Properties under Compression

Advanced Engineering Materials, EarlyView.
Cubic Bézier curves are used in the synthesis of novel surface‐based metamaterials with tunable mechanical properties. Surface‐based geometries are 3D printed and tested in compression. The resulting mechanical properties are correlated to changes in the shape of the base curve, with high potential in energy absorption through the adjustment of their ...
Alberto Álvarez‐Trejo, Enrique Cuan‐Urquizo, Armando Roman‐Flores   +2 more
wiley   +1 more source