Results 21 to 30 of about 167,073 (248)

State foreign trade policy as an object of study in the scientific works of Ukrainian and foreign researchers

open access: yesЕкономіка, управління та адміністрування, 2020
The relevance of the research topic is related to the growth of publishing activity in the field of foreign trade policy and is based on the analysis of such publications in the world's largest abstract database Scopus.
O.V. Oliinyk, V.V. Ksendzuk
doaj   +1 more source

The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu

open access: yesThe Astrophysical Journal Letters, 2023
The nucleosynthetic isotope composition of planetary materials provides a record of the heterogeneous distribution of stardust within the early solar system.
Martin Bizzarro   +89 more
doaj   +1 more source

An orbital window into the ancient Sun's mass [PDF]

open access: yes, 2018
Models of the Sun's long-term evolution suggest that its luminosity was substantially reduced 2-4 billion years ago, which is inconsistent with substantial evidence for warm and wet conditions in the geological records of both ancient Earth and Mars ...
Fischer, Woodward W.   +2 more
core   +3 more sources

230 Th normalization: new insights on an essential tool for quantifying sedimentary fluxes in the modern and quaternary ocean [PDF]

open access: yes, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Costa, K. M., Hayes, C. T., Anderson, R. F., Pavia, F. J., Bausch, A., Deng, F., Dutay, J., Geibert, W.
Anderson, Robert F.   +33 more
core   +9 more sources

Nonequilibrium thermodynamics of circulation regimes in optically-thin, dry atmospheres [PDF]

open access: yes, 2013
An extensive analysis of an optically-thin, dry atmosphere at different values of the thermal Rossby number Ro and of the Taylor number Ff is per- formed with a general circulation model by varying the rotation rate {\Omega} and the surface drag {\tau ...
Adams   +105 more
core   +2 more sources

Challenges Regionalizing Methane Emissions Using Aquatic Environments in the Amazon Basin as Examples

open access: yesFrontiers in Environmental Science, 2022
Key challenges to regionalization of methane fluxes in the Amazon basin are the large seasonal variation in inundated areas and habitats, the wide variety of aquatic ecosystems throughout the Amazon basin, and the variability in methane fluxes in time ...
John M. Melack   +12 more
doaj   +1 more source

High-Fidelity Archeointensity Results for the Late Neolithic Period From Central China [PDF]

open access: yes, 2020
Archeomagnetism focuses on exploring high-resolution variations of the geomagnetic field over hundreds to thousands of years. In this study, we carried out a comprehensive study of chronology, absolute and relative paleointensity on a late Neolithic site
Cai, S   +6 more
core   +1 more source

Large-scale open-source three-dimensional growth curves for clinical facial assessment and objective description of facial dysmorphism

open access: yesScientific Reports, 2021
Craniofacial dysmorphism is associated with thousands of genetic and environmental disorders. Delineation of salient facial characteristics can guide clinicians towards a correct clinical diagnosis and understanding the pathogenesis of the disorder ...
Harold S. Matthews   +14 more
doaj   +1 more source

The Effect of Multiple Heat Sources on Exomoon Habitable Zones [PDF]

open access: yes, 2017
With dozens of Jovian and super-Jovian exoplanets known to orbit their host stars in or near the stellar habitable zones, it has recently been suggested that moons the size of Mars could offer abundant surface habitats beyond the solar system.
Dobos, Vera   +2 more
core   +2 more sources

Earth’s polar night boundary layer as an analogue for dark side inversions on synchronously rotating terrestrial exoplanets [PDF]

open access: yes, 2020
A key factor in determining the potential habitability of synchronously rotating planets is the strength of the atmospheric boundary layer inversion between the dark side surface and the free atmosphere.
Elvidge, Andrew   +3 more
core   +2 more sources

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