Results 11 to 20 of about 2,666,833 (318)

On the Possibility of Universal Chemometric Calibration in X-ray Fluorescence Spectrometry: Case Study with Ore and Steel Samples

open access: yesApplied Sciences, 2023
The accuracy of X-ray fluorescence spectrometry in quantitative element analysis depends on the particular sample composition (so-called matrix effects). Counteracting these effects requires a large number of calibration samples similar in composition to
Zahars Selivanovs   +2 more
doaj   +1 more source

Compilation of fundamental parameters of earth

open access: yesSolid Earth Sciences
Earth is a unique planet in the universe characterized by a stable crust and a dynamic internal environment, fostering intelligent life. Studying Earth not only aids in understanding our habitat but also helps uncover mysteries of other celestial bodies.
Sirui Liu, Jianghong Deng
doaj   +2 more sources

Asteroseismic Analysis of δ Scuti Components of Binary Systems: The Case of KIC 8504570

open access: yesGalaxies, 2020
The present work concerns the Asteroseismology of the Kepler-detached eclipsing binary KIC 8504570. Particularly, it focuses on the pulsational behaviour of the oscillating component of this system and the estimation of its physical parameters in order ...
Alexios Liakos, Panagiotis Niarchos
doaj   +1 more source

New Light Curve Analysis for Large Numbers of Eclipsing Binaries I. Detached and Semi-Detached Binaries [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
Several survey observations have produced light curves of more than five thousand eclipsing binaries for last 15 years. Future missions such as the Large Synoptic Survey Telescope (LSST), the Panoramic Survey Telescope and Rapid Response System (Pan ...
Young-Woon Kang
doaj   +1 more source

Solar astrophysical fundamental parameters [PDF]

open access: yesSPIE Proceedings, 2014
The accurate determination of the solar photospheric radius has been an important problem in astronomy for many centuries. From the measurements made by the PICARD spacecraft during the transit of Venus in 2012, we obtained a solar radius of 696,156±145 kilometres. This value is consistent with recent measurements carried out atmosphere.
Meftah, Mustapha   +2 more
openaire   +2 more sources

Fundamental Parameters For Microanalysis [PDF]

open access: yesMicroscopy Today, 1996
Abstract In order to perform quantitative X-ray microanalysis many parameters, representing the various stages of X-ray generation and transport through the specimen at the chosen experimental conditions, must be known for all of the elements that might be encountered.
openaire   +1 more source

Fundamental Parameters of Cepheids: Masses and Multiplicity [PDF]

open access: yes, 2009
Masses determined from classical Cepheids in binary systems are a primary test of both pulsation and evolutionary calculations. The first step is to determine the orbit from ground-based radial velocities.
Joyce Ann Guzik   +2 more
core   +2 more sources

Fundamental parameters from precision tests [PDF]

open access: yesJournal of Physics G: Nuclear and Particle Physics, 2002
9 pages, 4 figures, Talk presented at the Symposium in Honor of Alberto Sirlin, NYU, NY, October ...
openaire   +2 more sources

Analysis of Interstellar Extinction towards the Hypergiant Cyg OB2 No. 12

open access: yesOpen Astronomy, 2016
The Cyg OB2 stellar association hosts an entire zoo of unique objects, and among them – an enigmatic star Cyg OB2 No. 12 (Schulte 12, MT 304). MT 304 is enigmatic not only due to its highest luminosity (according to various estimates, it is one of the ...
Maryeva O. V.   +3 more
doaj   +1 more source

Photospheric properties and fundamental parameters of M dwarfs [PDF]

open access: yes, 2017
M dwarfs are an important source of information when studying and probing the lower end of the Hertzsprung-Russell (HR) diagram, down to the hydrogen-burning limit.
Allard, F.   +5 more
core   +2 more sources

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