Results 61 to 70 of about 27,387 (213)
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source
Fresnel zone plate forms images at wavelengths below 1000 angstroms [PDF]
, 1965 Fresnel zone plate with openings replacing the usual transparent rings produces images in a vacuum ultraviolet.
core +1 more source
BeSense: Leveraging WiFi Channel Data and Computational Intelligence for Behavior Analysis
, 2020 The ever evolving informatics technology has gradually bounded human and computer in a compact way. Understanding user behavior becomes a key enabler in many fields such as sedentary-related healthcare, human-computer interaction (HCI) and affective ...
Gu, Yu +3 more
core +1 more source
Wavelet analysis of the LF radio signals collected by the European VLF/LF network from July 2009 to April 2011 [PDF]
, 2012 In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these bands, with the measurement for each of them of the ...
Arabelos, D.N. +13 more
core +2 more sources
Advanced Physics Research, EarlyView.Nanoscale 3D imaging of superparamagnetic microbeads via soft X‐ray laminography reveals the structural origin of the observed torques in cell movement experiments. These microbeads are found to have an uneven distribution of magnetic magnetite nanoparticles.
Findan Block +9 more
wiley +1 more source
High efficiency and low absorption Fresnel compound zone plates for hard X-ray focusing
, 2005 Circular and linear zone plates have been fabricated on the surface of silicon crystals for the energy of 8 keV by electron beam lithography and deep ion plasma etching methods.
Aristov, V. +11 more
core +1 more source
Method for controlling the shift invariance of optical correlators [PDF]
, 1999 Holographic correlators can implement many correlations in parallel. For most systems shift invariance limits the number of correlation templates that can be stored in one correlator.
Levene, Michael +2 more
core +1 more source
TRANSVERSE SCATTERING OF RADIO WAVES BY METEOR TRAILS IN PULSED MODE
Вестник Дагестанского государственного технического университета: Технические науки, 2017 Objectives. The aim of this work is to develop a mathematical tool for describing the scattering of radio signals by meteor trails associated with radio wave dispersion taking into account a range of extenuatory factors.
A. A. Gaydaev
doaj +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez +3 more
wiley +1 more source
Development of Ground-testable Phase Fresnel Lenses in Silicon
, 2006 Diffractive/refractive optics, such as Phase Fresnel Lenses (PFL's), offer the potential to achieve excellent imaging performance in the x-ray and gamma-ray photon regimes.
B. Morgan +14 more
core +1 more source