Results 1 to 10 of about 330,080 (276)

Use of Rayleigh Distribution Method for Assessment of Wind Energy Output in Cleveland–Ohio [PDF]

open access: yesRenewable Energy Research and Applications, 2020
In the developed world, energy is one of the major factors and research is focusing on renewable energy. The global warming, CO2, NOX and limited fossil fuel are the research areas that are important.
RSR Gorla, M. K. Pallikonda, G. Walunj
doaj   +1 more source

Effect of the Composite Material of the Car's Bumper on its Fundamental Natural Frequency and Response As A Result of Car Vibration [PDF]

open access: yesEngineering and Technology Journal, 2010
Effect of vibration on the car's bumper was studied in this paper.Composite materials are used in manufacturing the car's bumper. The methods thatused in this investigation are Rayleigh's formula for lumped masses in addition tosuper position method and ...
Ruaa Yaseen Hammoudi
doaj   +1 more source

A Fully Relativistic Approach to Photon Scattering and Photoionization of Alkali Atoms

open access: yesAtoms, 2021
A fully relativistic approach to calculating photoionization and photon-atom scattering cross sections for quasi one-electron atoms is presented. An extensive set of photoionization cross sections have been calculated for alkali atoms: lithium, sodium ...
Adam Singor   +3 more
doaj   +1 more source

Performance Evaluation of Dual Tree Complex Wavelet Packet Modulation (Dt-Cwpm) System Over Multipath Rayleigh Fading Channel [PDF]

open access: yesEngineering and Technology Journal, 2013
The effectiveness of Dual Tree Complex Wavelet Packet Modulation (DT-CWPM) with DQPSK modulation is investigated for communication over flat and frequency selective Rayleigh fading channel. The simulation results show that the performance of the proposed
Hikmat N. Abdullah   +2 more
doaj   +1 more source

Evaluation of Low Density Parity Check Codes Over Various Channel Types [PDF]

open access: yesEngineering and Technology Journal, 2011
Low density parity check (LDPC) codes are one of the best error correcting codes in today’s coding world and are known to approach the Shannon limit. As with all other channel coding schemes, LDPC codes add redundancy to the uncoded input data to make it
Mahmood Farhan Mosleh
doaj   +1 more source

The Fractal Tapestry of Life: III Multifractals Entail the Fractional Calculus

open access: yesFractal and Fractional, 2022
This is the third essay advocating the use the (non-integer) fractional calculus (FC) to capture the dynamics of complex networks in the twilight of the Newtonian era. Herein, the focus is on drawing a distinction between networks described by monfractal
Bruce J. West
doaj   +1 more source

Ultra-broadband nearly perfect absorbers based on graphene-coated lossy metallic nanostructures

open access: yesResults in Physics, 2022
In this paper, we present a new thin-film broadband nanostructured metamaterial absorber based on a graphene-coated plasmonic lossy metal–insulator–metal.
Raha Khosravi   +2 more
doaj   +1 more source

Exponentially growing solutions in homogeneous Rayleigh-Benard convection [PDF]

open access: yes, 2006
It is shown that homogeneous Rayleigh-Benard flow, i.e., Rayleigh-Benard turbulence with periodic boundary conditions in all directions and a volume forcing of the temperature field by a mean gradient, has a family of exact, exponentially growing ...
A. Tanabe   +8 more
core   +14 more sources

Surface Crack Monitoring by Rayleigh Waves with a Piezoelectric-Polymer-Film Ultrasonic Transducer Array

open access: yesSensors, 2023
This paper presents a method for measuring surface cracks based on the analysis of Rayleigh waves in the frequency domain. The Rayleigh waves were detected by a Rayleigh wave receiver array made of a piezoelectric polyvinylidene fluoride (PVDF) film and ...
Xiaotian Li   +8 more
doaj   +1 more source

Investigation and Enhancement of the Detectability of Flaws with a Coarse Measuring Grid and Air Coupled Ultrasound for NDT of Panel Materials Using the Re-Radiation Method

open access: yesApplied Sciences, 2020
Non-destructive ultrasonic testing is utilized widely by industries for quality assurance. For sensitive materials or surfaces, non-contact, non-destructive testing methods are in demand. The air-coupled ultrasound (ACU) is one possible solution.
Andreas Sebastian Schmelt   +3 more
doaj   +1 more source

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