Results 11 to 20 of about 4,486,936 (248)

Energy Efficiency Optimization for Mutual-Coupling-Aware Wireless Communication System based on RIS-enhanced SWIPT

open access: yes, 2023
The widespread deployment of the Internet of Things (IoT) is promoting interest in simultaneous wireless information and power transfer (SWIPT), the performance of which can be further improved by employing a reconfigurable intelligent surface (RIS).
X Zhang (6084905)   +4 more
core   +7 more sources

High Efficiency Coupling Technology of Silicon Photonic Modulator and Single-Mode Optical Fiber

open access: yesGuangtongxin yanjiu, 2021
Due to the small mode field of silicon photonic chips, the large coupling loss is a road-blocker for their applications. In this work, the coupling efficiency between a silicon photonic modulator chip and a single-mode optical fiber is investigated.
Zhong-xiang TAN   +5 more
doaj   +1 more source

Evaluation of the Efficiency of Generation of Terahertz Surface Plasmon Polaritons by the End-Fire Coupling Technique

open access: yesPhotonics, 2023
One of the most important problems in the plasmonics of the terahertz (THz) range, which is actively developing now, is the efficient generation of surface plasmon polaritons (SPPs).
Vasily Valerievich Gerasimov   +3 more
doaj   +1 more source

Bioenergetic and Proteomic Profiling of Immune Cells in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Patients: An Exploratory Study

open access: yesBiomolecules, 2021
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a heterogeneous, debilitating, and complex disease. Along with disabling fatigue, ME/CFS presents an array of other core symptoms, including autonomic nervous system (ANS) dysfunction ...
Paula Fernandez-Guerra   +8 more
doaj   +1 more source

Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction [PDF]

open access: yes, 2022
Catalyst platforms that promote multielectron charge delocalization offer an attractive approach to achieving the CO2 reduction reaction (CO2RR) with selectivity over the competing hydrogen evolution reaction (HER).
Jeffrey, Derrick   +6 more
core   +2 more sources

Active Middle Ear Implant Evoked Auditory Brainstem Response Intensity-Latency Characteristics

open access: yesFrontiers in Neurology, 2022
ObjectiveTo analyze intensity-latency functions of intraoperative auditory evoked brainstem responses (ABRs) to stimulation by the Vibrant Soundbridge (VSB) active middle ear implant with respect to coupling efficiency, VSB evoked ABR thresholds, and ...
Laura Fröhlich   +7 more
doaj   +1 more source

Standard Deviation of Fiber-Coupling Efficiency for Free-Space Optical Communication Through Atmospheric Turbulence

open access: yesIEEE Photonics Journal, 2023
In fiber-based optical receivers such as coherent receiver, the optical signal reaching the receiver's aperture is coupled to the optical fiber through a set of lenses.
Woohyeon Moon, Hoon Kim
doaj   +1 more source

Coupling Efficiency of a Partially Coherent Radially Polarized Vortex Beam into a Single-Mode Fiber

open access: yesApplied Sciences, 2018
We study the problem of coupling partially coherent radially polarized (PCRP) vortex beams into a single-mode optical fiber. Using the well-known concept of the cross-spectral density (CSD) matrix, we derive a general expression for the coupling ...
Xinlei Zhu   +4 more
doaj   +1 more source

Interplay of solar wind parameters and physical mechanisms producing the saturation of the cross polar cap potential

open access: yesGeophysical Research Letters, 2017
The nonlinear response of the cross polar cap potential (CPCP) to solar wind driving electric field is a well‐known phenomenon. The reasons behind this saturation, however, are still under debate.
M. Myllys, E. K. J. Kipua, B. Lavraud
doaj   +1 more source

The Effect of Spatial Mode Distribution on Coupling Efficiency of Single-Mode Fiber: Theoretical Analysis and Experimental Verification

open access: yesApplied Sciences, 2019
In this study, Zernike polynomials and optical fiber field theory are applied to build a mathematical model of coupling efficiency (CE) and spatial mode of aberrations.
Yongkai Liu   +6 more
doaj   +1 more source

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