Results 81 to 90 of about 784,385 (282)

Regards sur la nature : place de l’observation dans les textes astronomiques latins

open access: yesPallas, 2013
In antiquity, astronomical knowledge came essentially from philosophy, mathematics and logic. One can then question the role given to the observation of phenomena. To answer this question, we chose to analyze some of the demonstrations presented in Latin
Émilie-Jade Poliquin
doaj   +1 more source

Giant Radio Sources in View of the Dynamical Evolution of FRII-type Population

open access: yes, 2003
The time evolution of giant (D>1 Mpc) lobe-dominated galaxies is analysed on the basis of dynamical evolution of the entire FRII-type population.Comment: 4 pages, 2 Postscript figures, uses baltlat1.sty To be published in "Radio astronomy at 70: from ...
Chyzy, K., Jamrozy, M., Machalski, J.
core   +1 more source

Layer‐Dependent Antiferromagnetic Chern and Axion Insulating States in UOTe

open access: yesAdvanced Science, EarlyView.
Layer‐dependent topological phases are identified in the van der Waals antiferromagnet UOTe. Ab initio calculations reveal bilayer UOTe as a rare example of high‐temperature antiferromagnetic Chern insulator with quantized Hall conductivity and near‐zero net magnetization, while odd‐layer films exhibit axion‐insulator‐like behavior with quantized spin ...
Sougata Mardanya   +10 more
wiley   +1 more source

A Brief Review of Unsupervised Machine Learning Algorithms in Astronomy: Dimensionality Reduction and Clustering

open access: yesUniverse
This review investigates the application of unsupervised machine learning algorithms to astronomical data. Unsupervised machine learning enables researchers to analyze large, high-dimensional, and unlabeled datasets and is sometimes considered more ...
Chih-Ting Kuo, Duo Xu, Rachel Friesen
doaj   +1 more source

Ultra High Energy Cosmic Rays, Z-Shower and Neutrino Astronomy by Horizontal-Upward Tau Air-Showers

open access: yes, 2003
Ultra High Cosmic Rays (UHECR) Astronomy may be correlated to a primary parental Neutrino Astronomy: indeed any far BL Lac Jet or GRB, sources of UHECR, located at cosmic edges, may send its signal, overcoming the severe GZK cut-off, by help of UHE ZeV ...
Fargion, D.
core   +1 more source

Multimessenger Universe with Gravitational Waves from Binaries [PDF]

open access: yes, 2019
Future GW detector networks and EM observatories will provide a unique opportunity to observe the most luminous events in the Universe involving matter in extreme environs.
Anand, Shreya   +11 more
core   +1 more source

Early Detection of Cell Death Using Transmembrane Water Exchange Magnetic Resonance Imaging

open access: yesAdvanced Science, EarlyView.
Cell death is important in both the development and treatment of cancer. In this study, it is demonstrated for the first time that a specific measurement of the transmembrane water exchange rate using magnetic resonance imaging can be used as an early marker of cell death in mammalian cells, in animals and in human patients. Abstract Cell death plays a
Athanasia Kaika   +22 more
wiley   +1 more source

Exploitation and Apocalypse: Imagined Futures of Space Colonization

open access: yesCaliban: French Journal of English Studies
As private ventures into near-Earth orbit increase in frequency and take a more active role in facilitating scientific research, eyes turn to the Moon and Mars as possible destinations for humanity to establish a permanent presence.
Matt Harvey
doaj   +1 more source

The Social Structure of Islamicate Science

open access: yesJournal of World Philosophies, 2017
The view that Islamicate science went into decline while European science was getting started is still commonly held among historians of science and almost universal in general history and popular presentations.
Peter Barker
doaj   +1 more source

Radio astronomy [PDF]

open access: yes
The activities of the Deep Space Network in support of radio and radar astronomy operations during July and August 1980 are reported. A brief update on the OSS-sponsored planetary radio astronomy experiment is provided. Also included are two updates, one
Manchester, R. N., Taylor, R. M.
core   +1 more source

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