Results 21 to 30 of about 4,724,423 (285)

A High-Resolution Dyadic Transform for Non-Stationary Signal Analysis

open access: yesMathematics, 2021
This article shows a new Te-transform and its periodogram for applications that mainly exhibit stochastic behavior with a signal-to-noise ratio lower than −30 dB.
Eduardo Trutié-Carrero   +2 more
doaj   +1 more source

Sensing Method Using Dielectric Loss Factor to Evaluate Surface Conditions on Polluted Porcelain Insulator

open access: yesSensors, 2022
Insulator diagnostics is still a topical issue. No one has yet found out how to accurately determine the condition of all insulators and decide when replacement or maintenance is required.
Ľuboš Šárpataky   +5 more
doaj   +1 more source

Loss of the Synuclein Family Members Differentially Affects Baseline- and Apomorphine-Associated EEG Determinants in Single-, Double- and Triple-Knockout Mice

open access: yesBiomedicines, 2022
Synucleins comprise a family of small proteins highly expressed in the nervous system of vertebrates and involved in various intraneuronal processes. The malfunction of alpha-synuclein is one of the key events in pathogenesis of Parkinson disease and ...
Vasily Vorobyov   +6 more
doaj   +1 more source

Comparison of focusing of short pulses in the Debye approximation [PDF]

open access: yesКомпьютерная оптика, 2018
We have examined different types of pulses and features of their frequency spectra. Calculations have shown that a significant distinction between the pulses only takes place at a very short pulse duration (shorter than the oscillation period).
Svetlana Khonina   +2 more
doaj   +1 more source

Selector for the Spectrum Award 2018

open access: yes, 2018
Billingham was invited to be part of the selection panel for the first Spectrum Award in 2018 alongside Mark Wallinger, Charming Baker, Professor Simon Baron-Cohen, Sacha Craddock and Mary Simpson.
Billingham, Richard, Spectrum
core   +3 more sources

World radiocommunication conference 12 : implications for the spectrum eco-system [PDF]

open access: yes, 2012
Spectrum allocation is once more a key issue facing the global telecommunications industry. Largely overlooked in current debates, however, is the World Radiocommunication Conference (WRC).
Irvine, James   +2 more
core   +4 more sources

Phase-Sensitive 2D Motion Estimators Using Frequency Spectra of Ultrasonic Echoes

open access: yesApplied Sciences, 2016
Recently, high-frame-rate ultrasound has been extensively studied for measurement of tissue dynamics, such as pulsations of the carotid artery and heart. Motion estimators are very important for such measurements of tissue dynamics.
Hideyuki Hasegawa
doaj   +1 more source

Wind Speed Spectrum of a Moving Vehicle under Turbulent Crosswinds

open access: yesApplied Sciences, 2023
Wind loads have become one of the key influencing factors for the running safety of vehicles and comfort of passengers. The investigation of the wind speed spectrum characteristics of a moving vehicle under turbulent crosswinds is of great importance ...
Qingsong Duan
doaj   +1 more source

Multipath Identification and Mitigation for Enhanced GNSS Positioning in Urban Environments

open access: yesSensors
Due to the increasing demand for accurate and robust GNSS positioning for location-based services (LBS) in urban regions, the impacts prevalent in metropolitan areas, like multipath reflections and various interferences, have become persistent challenges.
Qianxia Li   +5 more
doaj   +1 more source

Borneo Lute ‘Sape’: The Frequency Spectrum and Time Frequency Analysis (TFA)

open access: yesBioResources, 2023
Sound elements were studied for a six strings sape, a traditional instrument. The frequency was evaluated using a frequency spectrum and a time frequency plane. PicoScope oscilloscopes and Adobe Audition version 3 were used to record the acoustic spectra.
Sinin Hamdan   +4 more
doaj  

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