Results 1 to 10 of about 9,632,597 (235)

An Implementation of the Fundamental Parameters Approach for Analysis of X-ray Powder Diffraction Line Profiles. [PDF]

open access: yesJ Res Natl Inst Stand Technol, 2015
This work presents an open implementation of the Fundamental Parameters Approach (FPA) models for analysis of X-ray powder diffraction line profiles. The original literature describing these models was examined and code was developed to allow for their ...
Mendenhall MH, Mullen K, Cline JP.
europepmc   +2 more sources

Mitochondrial Morphology and Fundamental Parameters of the Mitochondrial Respiratory Chain Are Altered in Caenorhabditis elegans Strains Deficient in Mitochondrial Dynamics and Homeostasis Processes. [PDF]

open access: yesPLoS One, 2015
Mitochondrial dysfunction has been linked to myriad human diseases and toxicant exposures, highlighting the need for assays capable of rapidly assessing mitochondrial health in vivo.
Luz AL   +5 more
europepmc   +2 more sources

Fundamental stellar parameters [PDF]

open access: green, 2004
I present a discussion of fundamental stellar parameters and their observational determination in the context of interferometric measurements with current and future optical/infrared interferometric facilities. Stellar parameters and the importance of their determination for stellar physics are discussed.
M. Wittkowski
openalex   +3 more sources

A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1* [PDF]

open access: yesThe Astrophysical Journal, 2019
Abstract We present the distance-calibrated spectral energy distribution (SED) of TRAPPIST-1 using a new medium-resolution (R ∼ 6000) near-infrared (NIR) Folded-port InfraRed Echellette (FIRE) spectrum and its Gaia parallax. We report an updated bolometric luminosity (L bol) of −3.216 ± 0.016, along with semiempirical ...
Eileen C. Gonzales   +5 more
openaire   +3 more sources

Eötvös Bounds on Couplings of Fundamental Parameters to Gravity [PDF]

open access: greenPhysical Review Letters, 2008
To be published (Phys.Rev.Lett.), minor changes and corrections, equivalent to journal ...
T. Dent
openalex   +5 more sources

On the fundamental nature of the state parameter [PDF]

open access: hybridGéotechnique, 2021
The state parameter ψ is widely used for soil characterisation and as a controlling parameter in modern constitutive understanding of soil, but there remains a perception that the control of soil strength by ψ is merely that of a correlation. This perception possibly stems from ψ having been introduced from ‘principles’ of critical state theory rather
M. G. Jefferies
openalex   +2 more sources

Spectroscopic and physical parameters of Galactic O-type stars. II. Observational constraints on projected rotational and extra broadening velocities as a function of fundamental parameters and stellar evolution [PDF]

open access: green, 2013
Rotation is of key importance for the evolution of hot massive stars, however, the rotational velocities of these stars are difficult to determine. Based on our own data for 31 Galactic O stars and incorporating similar data for 86 OB supergiants from ...
N. Markova   +5 more
openalex   +3 more sources

VLTI/AMBER observations of cold giant stars: atmospheric structures and fundamental parameters [PDF]

open access: bronze, 2014
Aims. The main goal of this research is to determine the angular size and the atmospheric structures of cool giant stars (epsilon Oct, beta Peg, NU Pav, psi Peg, and gamma Hya) and to compare them with hydrostatic stellar model atmospheres, to estimate ...
B. Arroyo-Torres   +14 more
openalex   +3 more sources

The fundamental parameters of the roAp star 10 Aquilae [PDF]

open access: yesAstronomy & Astrophysics, 2013
Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of these pulsators.
Perraut, K.   +14 more
openaire   +4 more sources

Fundamental parameters and stellar evolution

open access: green, 2004
Some discrepancies have been pointed by various authors (Popper 1997, Torres & Ribas 2002) in the past few years between stellar evolution model predictions in the 0.7 - 1.1 M⊙ mass range and results obtained from binary stars with the most accurately known properties.
E. Oblak   +4 more
openalex   +4 more sources

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