Results 41 to 50 of about 207,262 (276)

AGB Stars and Their Circumstellar Envelopes: An Operative Approach to Computing Their Atmospheres

open access: yesUniverse, 2021
The study of AGB stars necessarily covers a wide range of topics, from the primary astronomical observations to their interpretation in terms of fundamental physics.
Lucio Crivellari   +2 more
doaj   +1 more source

Inflation in Terms of a Viscous van der Waals Coupled Fluid [PDF]

open access: yes, 2018
We propose to describe the acceleration of the universe by introducing a model of two coupled fluids. We focus on the accelerated expansion at the early stages. The inflationary expansion is described in terms of a van der Waals equation of state for the
Brevik, I.   +2 more
core   +2 more sources

ASTRONOMICAL TERMS IN ALISHER NAVOI'S EPIC "LAYLI AND MAJNUN"

open access: yes, 2022
The epic”Layli and Majnun” which is the third epic of “Khamsa” written by Alisher Navoi, the sultan of the word, consists of 3623 verses, in the text of this epic, Navoi used terms related to various sciences and professions of his time. In particular, terms related to the socio-political, military, economic, animal and plant world, related to the ...
openaire   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

open access: yesAdvanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar   +8 more
wiley   +1 more source

Bibliography, catalogs, pixel data: Management of heterogeneous Big Data at CDS by the documentalists

open access: yesEPJ Web of Conferences, 2018
High speed Internet and the evolution of data storage space in terms of cost-effectiveness has changed the way data are managed today. Large amounts of heterogeneous data can now be visualized easily and rapidly using interactive applications such as ...
Buga M.   +5 more
doaj   +1 more source

Effect of inhomogeneity of the Universe on a gravitationally bound local system: A no-go result for explaining the secular increase in the astronomical unit [PDF]

open access: yes, 2012
We will investigate the influence of the inhomogeneity of the universe, especially that of the Lema{\^i}tre-Tolman-Bondi (LTB) model, on a gravitationally bound local system such as the solar system.
A Einstein   +53 more
core   +4 more sources

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

open access: yesAdvanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton   +11 more
wiley   +1 more source

Efficient Astronomical Data Condensation Using Approximate Nearest Neighbors

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2019
Extracting useful information from astronomical observations represents one of the most challenging tasks of data exploration. This is largely due to the volume of the data acquired using advanced observational tools.
Łukasik Szymon   +5 more
doaj   +1 more source

Estimation of Reliability Function for Complete Data - Article Review [PDF]

open access: yesالمجلة العراقية للعلوم الاحصائية, 2019
The theory of reliability is one of the important theories that is attracting great interest in many researchers at present because of its importance in various fields of life especially in determining the age of a particular device and its efficiency ...
Shaimaa Waleed
doaj   +1 more source

Galaxy Formation Theory [PDF]

open access: yes, 2010
We review the current theory of how galaxies form within the cosmological framework provided by the cold dark matter paradigm for structure formation. Beginning with the pre-galactic evolution of baryonic material we describe the analytical and numerical
Abadi   +563 more
core   +1 more source

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