Results 11 to 20 of about 6,562 (255)

An Interpretation of the Duplicate Painting of Iskandar's Birth Book [PDF]

open access: yesنگره, 2023
Since the third century AH، the science of astronomy that had a special place among Iranians long before the advent of Islam، has been studied and completed by many Muslim scholars، and the Iranian art became a means of visual expression and better ...
Mozhgan Esmaeilifar, MAHTAB Mobini
doaj   +1 more source

Neural Network Based Point Spread Function Deconvolution For Astronomical Applications

open access: yesThe Open Journal of Astrophysics, 2023
Optical astronomical images are strongly affected by the point spread function (PSF) of the optical system and the atmosphere (seeing) which blurs the observed image.
Hong Wang   +5 more
doaj   +1 more source

A Comparative Analysis of Constellations from the Perspective of the Qur'an and the Knowledge of Astronomy [PDF]

open access: yesپژوهش نامه معارف قرآنی, 2023
Celestial constellations have always been discussed and researched by astronomers due to their role in determining time and some astronomical calculations. In terms of guidance, the Holy Qur'an clearly mentions constellations in three verses, and a surah
seyyed isa mostarhami
doaj   +1 more source

Lorentz Symmetry Violation of Cosmic Photons

open access: yesUniverse, 2022
As a basic symmetry of space-time, Lorentz symmetry has played important roles in various fields of physics, and it is a glamorous question whether Lorentz symmetry breaks.
Ping He, Bo-Qiang Ma
doaj   +1 more source

Synonymy of art history terms: synonyms, variants or competitors for a place in the system

open access: yesДискурс профессиональной коммуникации, 2023
The relevance of this study is preconditioned by the appeal to the problem of the development of the term semantics on the example of synonymy in the framework of modern terminology of art history.
S. V. Ivanova, P. E. Dovgopiat
doaj   +1 more source

Astronomical aspects of Group E-type complexes and implications for understanding ancient Maya architecture and urban planning.

open access: yesPLoS ONE, 2021
In the 1920s, during the first archaeological excavations at Uaxactún, Petén, Guatemala, an architectural complex named Group E was interpreted as an ancient Maya astronomical observatory, intended specifically for sighting the equinoctial and solstitial
Ivan Šprajc
doaj   +1 more source

Proper motion of Cygnus Loop shock filaments [PDF]

open access: yesSerbian Astronomical Journal, 2023
We determined the shock speed in the Galactic supernova remnant Cygnus Loop, using the proper motion of its optical filaments and the latest estimate of its distance.
Vučetić M.   +6 more
doaj   +1 more source

Technical note: On seasonal variability of the M2 tide [PDF]

open access: yesOcean Science, 2022
Seasonal variability of the M2 ocean tide can be detected at many ports, perhaps most. Examination of the cluster of tidal constituents residing within the M2 tidal group can shed light on the physical mechanisms underlying seasonality.
R. D. Ray
doaj   +1 more source

The Effect of the Position of the Stars on Human Drawings in Two Versions of Suwar al-Kawākib in the 9th Century AH/15th Century AD [PDF]

open access: yesنگره, 2023
"Kitab Suwar Al-Kawākib" (Book of Fixed Stars) written by Abd al-Rahman Sufi Razi (291-376 AH/903-986 AD) is one of the most famous books of ancient astronomy.
S. Ali asghar Rabani   +1 more
doaj   +1 more source

A Novel Method to Improve the Estimation of Ocean Tide Loading Displacements for K1 and K2 Components with GPS Observations

open access: yesRemote Sensing, 2023
The accurate estimation of ocean tide loading displacements is essential and necessary for geodesy, oceanic and geophysical studies. It is common knowledge that K1 and K2 tidal constituents estimated from Global Positioning System (GPS) observations are ...
Haidong Pan   +4 more
doaj   +1 more source

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