Results 11 to 20 of about 513,874 (269)

Orbital dynamics and characterization of space debris via optical observations [PDF]

open access: yesINCAS Bulletin, 2023
Studying the long-term dynamical evolution of space debris and the development of optical measurements help us to avoid collision risks caused by these objects.
Hager GHONIEM   +4 more
doaj   +1 more source

Cough Aerosol Cloud Parameters [PDF]

open access: yesE3S Web of Conferences, 2023
This work is a further development of the authors' COVID-19 pandemic consequences research. The dynamics of the cough aerosol cloud was studied. An experimental setup for fixing spatial and temporal distributions of aerosol cloud velocities was used ...
Gavrilin Sergey N.   +3 more
doaj   +1 more source

Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

open access: yesFoods, 2021
Today, measurement of raw milk quality and composition relies on Fourier transform infrared spectroscopy to monitor and improve dairy production and cow health.
Sanna Uusitalo   +9 more
doaj   +1 more source

Algorithms for Real-Valued Noisy Damped Sinusoid Parameter Estimation

open access: yesIEEE Open Journal of Instrumentation and Measurement, 2022
In this article, an improved version of three state-of-the-art interpolated discrete-time Fourier transform (IpDTFT) algorithms for the estimation of the frequency and the damping factor of noisy damped sinusoids is proposed. Sinusoid amplitude and phase
Daniel Belega, Dario Petri
doaj   +1 more source

The Measurement of Nanoparticle Concentrations by the Method of Microcavity Mode Broadening Rate

open access: yesSensors, 2020
A measurement system for the detection of a low concentration of nanoparticles based on optical microcavities with whispering-gallery modes (WGMs) is developed and investigated.
Alexey Ivanov   +3 more
doaj   +1 more source

Identification of cladding modes in SMF-28 fibers with TFBG structures [PDF]

open access: yesMetrology and Measurement Systems, 2023
This article proposes an unequivocal method of labeling and numbering the cladding modes propagating in single-mode opticalwaveguides with tilted periodic structures.
Piotr Kisała   +3 more
doaj   +1 more source

Development of certified reference materials for physicochemical analysis. Certified reference solutions for the composition of aqueous aluminum, indium, magnesium, nickel and titanium

open access: yesСтандартные образцы, 2019
This paper presents information on the development and certification of reference materials (CRM) for the composition of aqueous aluminium, indium, magnesium, nickel, and titanium solutions.CRMs are represented by aqueous solutions containing aluminium ...
I. I. Ermakova   +3 more
doaj   +1 more source

Nano-biosensor based on the combined use of the dynamic and static light scattering for Aspergillus galactomannan analysis

open access: yesSensing and Bio-Sensing Research, 2022
A biosensor based on the analyte-induced aggregation of functionalized nanoparticles recorded using two optical signals of different physical nature is developed. The hydrodynamic diameter of the conjugates, measured by the dynamic light scattering (DLS)
M.K. Alenichev   +8 more
doaj   +1 more source

Size Dependence of the Resonant Third-Order Nonlinear Refraction of Colloidal PbS Quantum Dots

open access: yesPhotonics, 2020
Due to their high resonant third-order nonlinear response, lead sulfide quantum dots (QDs) are potential materials for applications in the field of nonlinear optics.
Ivan D. Skurlov   +7 more
doaj   +1 more source

Optical von Neumann measurement [PDF]

open access: yesPhysics Letters A, 1997
One latex figure. Accepted on Phys.
GM D'Ariano, MF Sacchi
openaire   +4 more sources

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