Results 81 to 90 of about 10,361,919 (382)
Compact Circular/Linear Polarization Dual-Band Prime-Focus Feed for Space Communication
International Journal of Antennas and Propagation, 2012 We propose a novel, compact, prime-focus antenna feed for space communication. The feed requires full-wave simulator optimization for a given parabolic reflector and is designed to operate simultaneously on two bands, offering LHC/RHC polarizations for ...
Rastislav Galuscak +2 more
doaj +1 more source
Demonstration of a Hybrid FSO/VLC Link for the Last Mile and Last Meter Networks
IEEE Photonics Journal, 2019 In this paper, a hybrid free-space optical and visible light communication (FSO/VLC) system was experimentally demonstrated as a solution to overcome the last mile and last meter access networks bandwidth bottleneck. We evaluate the system performance of
Petr Pesek +4 more
doaj +1 more source
Upper bounds on absorption and scattering
New Journal of Physics, 2020 A general framework for determining fundamental bounds in nanophotonics is introduced in this paper. The theory is based on convex optimization of dual problems constructed from operators generated by electromagnetic integral equations.
Mats Gustafsson +3 more
doaj +1 more source
SEISMO-ELECTROMAGNETIC PHENOMENA IN TECTONICALLY ACTIVE REGIONS [PDF]
, 2010 This work presents a research plan that aims to monitor seismo-electromagnetic signals in seismic active regions. Two effects will be considered: electromagnetic field emissions and radio broadcastings.
Bezzeghoud, M. +9 more
core
Effects of electromagnetic field on the dynamical instability of expansionfree gravitational collapse [PDF]
General Relativity and Gravitation, 2012 In this paper, we discuss the effects of electromagnetic field on the dynamical instability of a spherically symmetric expansionfree gravitational collapse.
Muhammad Sharif, M. Azam
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana +2 more
wiley +1 more source
Design of One-Eighth Spherical Dielectric Resonator Antenna for 5G Applications
IEEE Access, 2020 A one-eighth spherical surface dielectric resonator antenna (OESS-DRA) is proposed first time. To analyze this thin shell structure, electromagnetic fields distribution is discussed by using the Hertz vector and boundary conditions.
Zhiwei Song +4 more
doaj +1 more source
Alternative potentials for the electromagnetic field
, 2003 The electromagnetic field can be expressed in terms of two complex potentials $ \alpha, \beta ,$ which are related to the Debye potentials. The evolution equations for these potentials are derived, which are separable either in parabolic coordinates ...
Shaun N. Mosley, Wilcox C. H.
core +3 more sources
Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source
Advances in Mechanical Engineering, 2017 In this article, the reliability assessment and management of low-voltage switchgear was introduced based on a hierarchical Markov model. First, the reliability block diagram of motor control center was established by actual circuit.
Jingqin Wang +3 more
doaj +1 more source