Results 21 to 30 of about 33,502,480 (330)
International Astronomical Union Colloquium, 1997 AbstractA reference system is a relation connecting observables and their mathematical represententions. The principle of general relativity assures that any sort of coordinate system can be used to describe physical phenomena. Thus, any reference system is only a convention. There is no absolutely true reference system.
openaire +1 more source
THE KINEMATICS PARAMETERS OF THE GALAXY USING DATA OF MODERN ASTROMETRIC CATALOGUES
Odessa Astronomical Publications, 2016 Based on the Ogorodnikov-Milne model, we analyze the proper motions of XPM2, UCAC4 and PPMXL stars. To estimate distances to the stars we used the method of statistical parallaxes herewith the random errors of the distance estimations do not exceed 10 ...
V. S. Akhmetov +3 more
doaj +1 more source
Corrected μβ for stars of Hipparcos catalogue from independent latitude observations over many decades [PDF]
Serbian Astronomical Journal, 2011 During the last century, there were many so-called independent latitude (IL) stations with the observations which were included into data of a few international organizations (like Bureau International de l'Heure - BIH, International Polar ...
Damljanović G., Milić I.S.
doaj +1 more source
Ecology and Society, 2005 Flood disturbance processes play a key role in the functioning of riparian ecosystems and in the maintenance of biodiversity along river corridors. As a result, riparian ecosystems can be described as mobile habitat mosaics characterized by variability ...
Francine M. R. Hughes +2 more
doaj +1 more source
Changing quantum reference frames [PDF]
, 2014 We consider the process of changing reference frames in the case where the reference frames are quantum systems. We find that, as part of this process, decoherence is necessarily induced on any quantum system described relative to these frames.
Bartlett, Stephen D. +2 more
core +1 more source
GenomeScope 2.0 and Smudgeplot for reference-free profiling of polyploid genomes
Nature Communications, 2020 An important assessment prior to genome assembly and related analyses is genome profiling, where the k-mer frequencies within raw sequencing reads are analyzed to estimate major genome characteristics such as size, heterozygosity, and repetitiveness ...
T. Ranallo-Benavidez +4 more
semanticscholar +1 more source
Computation of charge distribution and electrostatic potential in silicates with the use of chemical potential equalization models [PDF]
, 2011 New parameters for the electronegativity equalization model (EEM) and the split-charge equilibration (SQE) model are calibrated for silicate materials, based on an extensive training set of representative isolated systems. In total, four calibrations are
Smirnov, Konstantin S +4 more
core +3 more sources
An alternative approach to reduce algorithm‐derived biases in monitoring soil organic carbon changes
Ecology and Evolution, 2019 Quantifying soil organic carbon (SOC) changes is a fundamental issue in ecology and sustainable agriculture. However, the algorithm‐derived biases in comparing SOC status have not been fully addressed.
Weixin Zhang +15 more
doaj +1 more source
Relativity: chronoeometric drawings
Литьë и металлургия, 2020 Based on the simplest representations, questions of relativistic compactification of reference systems with relative virtual motion, non-locality of pseudo-reference frames of world constants and Schrödinger’s thesis on the completeness of the general ...
I. O. Sazonenko, V. . I. Sazonenko
doaj +1 more source
Complex systems in the history of American English [PDF]
, 2014 Kretzschmar 2009 has demonstrated that language in use, speech as opposed to linguistic systems as usually described by linguists, satisfies the conditions for complex systems as defined in sciences such as physics, evolutionary biology, and economics ...
Kretzschmar, Jr., William A.
core +1 more source