Results 1 to 10 of about 23,594 (268)

A lunar sample renaissance

open access: yesNature Communications, 2021
Though the lunar samples returned by the Apollo and Luna missions have been studied for more than 50 years, scientists are discovering new clues into the early evolution of the Moon by looking through the lens of modern analytical techniques.
Tabb C. Prissel, Kelsey B. Prissel
doaj   +1 more source

SCANDINAVIAN LATE VIKING AGE ART STYLES AS A PART OF THE VISUAL DISPLAY OF WARRIORS IN 11TH CENTURY ESTONIA; pp. 118–139 [PDF]

open access: yesEesti Arheoloogiaajakiri, 2012
The article examines the archaeological finds from Estonia that are decorated in Scandinavian Late Viking Age ornamental styles. The majority of such finds come from burials in local fashion.
Indrek Jets
doaj   +1 more source

Improvement in Hurst exponent estimation and its application to financial markets

open access: yesFinancial Innovation, 2022
This research aims to improve the efficiency in estimating the Hurst exponent in financial time series. A new procedure is developed based on equality in distribution and is applicable to the estimation methods of the Hurst exponent.
A. Gómez-Águila   +2 more
doaj   +1 more source

Chromospheric Jets and Their Properties [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2022
In this study we review solar chromospheric jets and characteristics of them. The chromosphere and transition region are the interface between the solar photosphere and the corona, which plays a key role in the formation and acceleration of the solar ...
Ehsan Tavabi, Sima Zeighami
doaj   +1 more source

Unsupervised Quark/Gluon Jet Tagging With Poissonian Mixture Models

open access: yesFrontiers in Artificial Intelligence, 2022
The classification of jets induced by quarks or gluons is important for New Physics searches at high-energy colliders. However, available taggers usually rely on modeling the data through Monte Carlo simulations, which could veil intractable theoretical ...
E. Alvarez   +3 more
doaj   +1 more source

Wide-Angle-Tail (WAT) Radio Sources

open access: yesGalaxies, 2023
We review the properties of Wide-Angle-Tail (WAT) radio sources. The WAT radio sources are powerful, bent radio sources typically associated with the dominant galaxy in a cluster or group.
Christopher P. O’Dea, Stefi A. Baum
doaj   +1 more source

Porgandiks kasvamine: kirjandusteadlase kogemuslugu eksperimentaalsest vaimse tervise projektist [PDF]

open access: yesMäetagused
In February and March 2024, 12 ordinary people from Southern Estonia gave mostly sold-out shows of stand-up comedy about topics of mental health. Similarly to David Granirer’s program „Stand up for Mental Health“ in Canada and „Comedy on Referral ...
Kairi Jets
doaj   +1 more source

Promise of Persistent Multi-Messenger Astronomy with the Blazar OJ 287

open access: yesGalaxies, 2021
Successful observations of the seven predicted bremsstrahlung flares from the unique bright blazar OJ 287 firmly point to the presence of a nanohertz gravitational wave (GW) emitting supermassive black hole (SMBH) binary central engine.
Mauri J. Valtonen   +9 more
doaj   +1 more source

Radio Galaxies at TeV Energies

open access: yesGalaxies, 2022
Unlike blazars, radio galaxies have jets that are misaligned relative to our line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole.
Cameron Rulten
doaj   +1 more source

How is Fear Constructed? A Narrative Approach to Social Dread in Literature

open access: yesInterlitteraria, 2018
Fear-inducing narratives can be divided into two subtypes of horror and dread. While horror stories concentrate on a concrete visible object such as a monster, in dread narratives the object of fear is abstract or absent altogether.
Kairi Jets
doaj   +1 more source

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