Results 51 to 60 of about 1,423,214 (318)

Acknowledgement to Reviewers of Universe in 2015

open access: yesUniverse, 2016
The editors of Universe would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2015. [...]
Universe Editorial Office
doaj   +1 more source

Tensions between the early and late Universe [PDF]

open access: yesNature Astronomy, 2019
A Kavli Institute for Theoretical Physics workshop in July 2019 directed attention to the Hubble constant discrepancy. New results showed that it does not appear to depend on the use of any one method, team or source.
L. Verde, T. Treu, A. Riess
semanticscholar   +1 more source

Chaos and order in a finite universe [PDF]

open access: yes, 1999
All inhabitants of this universe, from galaxies to people, are finite. Yet the universe itself is often assumed to be infinite. If instead the universe is topologically finite, then light and matter can take chaotic paths around the compact geometry ...
Barrow, John D., Levin, Janna
core   +2 more sources

The Fractal Universe [PDF]

open access: yes, 2000
In this talk, we touch upon the chaotic and fractal aspects of the Universe.Comment: 5 pages ...
Abbott   +16 more
core   +3 more sources

Acknowledgement to Reviewers of Universe in 2017

open access: yesUniverse, 2018
Peer review is an essential part in the publication process, ensuring that Universe maintains high quality standards for its published papers.[...]
Universe Editorial Office
doaj   +1 more source

The Jungle Universe [PDF]

open access: yes, 2014
In this paper, we exploit the fact that the dynamics of homogeneous and isotropic Friedmann-Lemaitre universes is a special case of generalized Lotka-Volterra system where the competitive species are the barotropic fluids filling the Universe.
Carletti, Timoteo   +4 more
core   +5 more sources

General Thermodynamic Properties of FRW Universe and Heat Engine

open access: yesUniverse, 2022
In this work, the Friedmann–Robertson–Walker (FRW) Universe is considered a thermodynamic system, where the cosmological constant generates the thermodynamic pressure.
Ujjal Debnath
doaj   +1 more source

The Cloudy Universe [PDF]

open access: yes, 1999
Modelling of Extreme Scattering Events suggests that the Galaxy's dark matter is an undetected population of cold, AU-sized, planetary-mass gas clouds.
Binney   +17 more
core   +3 more sources

UNIVERSAL GRAPHS AND UNIVERSAL PERMUTATIONS [PDF]

open access: yesDiscrete Mathematics, Algorithms and Applications, 2013
Let X be a family of graphs and Xn the set of n-vertex graphs in X. A graph U(n) containing all graphs from Xn as induced subgraphs is called n-universal for X. Moreover, we say that U(n) is a propern-universal graph for X if it belongs to X. In the present paper, we construct a proper n-universal graph for the class of split permutation graphs.
Atminas, Aistis   +3 more
openaire   +3 more sources

An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5 [PDF]

open access: yesNature, 2017
Quasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the quasar ULAS J1120 + 0641 at redshift z = 7.09 has remained the only one ...
E. Bañados   +17 more
semanticscholar   +1 more source

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