Results 21 to 30 of about 9,888 (286)

TIME SCALES FOR ACHIEVING ASTRONOMICAL CONSENSUS [PDF]

open access: yesInternational Journal of Modern Physics D, 2008
The history of science can be recounted in many ways: by addressing the work of one person or school; by starting with the ancients and working chronologically up to the present; by focusing on a particular century; or by tracing a particular important idea as far back and forward as it can be found. The present discussion does none of these.
openaire   +4 more sources

Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the Geomagnetic Polarity and Astronomical Time Scale [PDF]

open access: yes, 2010
Planktonic foraminifera are widely utilized for the biostratigraphy of Cretaceous and Cenozoic marine sediments and are a fundamental component of Cenozoic chronostratigraphy.
Heiko Pälike   +8 more
core   +1 more source

Distinct responses of East Asian summer and winter monsoons to astronomical forcing [PDF]

open access: yesClimate of the Past, 2011
Influences of the Earth's astronomical forcing on the evolution of East Asian monsoon have been demonstrated with various geological records and climate models. Here, we present time series of climatic proxies from the Chinese Loess Plateau and Sanbao/
Z. G. Shi   +5 more
doaj   +1 more source

An efficient way to use MS‐CLEAN associated with Shannon's entropy

open access: yesIET Image Processing, 2021
This article covers deconvolution methods in the context of radio astronomical images. A new formulation is proposed to deal with negative brightness, deconvoluting separately the positive and negative brightness of the sky.
Ramon G. Campos, Evandro O. T. Salles
doaj   +1 more source

Astronomical Units, Constants and Time-Scales [PDF]

open access: yesHighlights of Astronomy, 1974
As I have already reported (Trans. IAU XVA, 9, 1973), the Working Group on Units and Time-scales was not able to reach any firm conclusions on whether the concepts of the astronomical unit and ephemeris time should be retained or replaced by the SI unit of length (metre) and atomic time.
openaire   +1 more source

The ANTARES astronomical time-domain event broker

open access: yes, 2021
We describe the Arizona-NOIRLab Temporal Analysis and Response to Events System (ANTARES), a software instrument designed to process large-scale streams of astronomical time-domain alerts.
Stubens, C.   +19 more
core   +1 more source

Geologically constrained astronomical solutions for the Cenozoic era [PDF]

open access: yes, 2022
Astronomical solutions provide insight into the Solar System's dynamical evolution and are indispensable tools in cyclostratigraphy and astrochronology.
Zeebe, R.E., Lourens, L.J.
core   +2 more sources

A hundred years of Milutin Milankovic's climate change theory-geological implications [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2020
Milanković’s cycles theory published hundred years ago is the most important theory in climate science and had great influence on Earth disciplines. Nevertheless, his work waited for more than fifty years for confirmation.
Radivojević Dejan
doaj   +1 more source

AstroCatR: a mechanism and tool for efficient time series reconstruction of large-scale astronomical catalogues [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Time series data of celestial objects are commonly used to study valuable and unexpected objects such as extrasolar planets and supernova in time domain astronomy. Due to the rapid growth of data volume, traditional manual methods are becoming extremely hard and infeasible for continuously analysing accumulated observation data.
Qing Zhao   +5 more
openaire   +2 more sources

Estimation of Astronomical Seeing with Neural Networks at the Maidanak Observatory

open access: yesAtmosphere, 2023
In the present article, we study the possibilities of machine learning for the estimation of seeing at the Maidanak Astronomical Observatory (38∘40′24″ N, 66∘53′47″ E) using only Era-5 reanalysis data.
Artem Y. Shikhovtsev   +6 more
doaj   +1 more source

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