Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Simen Braeck"'
Autor:
Simen Braeck
Publikováno v:
Universe, Vol 9, Iss 3, p 120 (2023)
In axistationary, asymptotically flat spacetimes, zero angular momentum observers (ZAMOs) define an absolute standard of non-rotation locally, as can be verified by the absence of any Sagnac effect for these observers. Nevertheless, we argue that on
Externí odkaz:
https://doaj.org/article/1b3e479a9b1b4329bfa8c8150748a4b8
Publikováno v:
Universe, Vol 3, Iss 2, p 38 (2017)
In order to provide a better understanding of rotating universe models, and in particular the Gödel universe, we discuss the relationship between cosmic rotation and perfect inertial dragging. In this connection, the concept of causal mass is define
Externí odkaz:
https://doaj.org/article/ff1c4b4642c14f319ecf9eb53d42455f
Publikováno v:
Universe; Volume 3; Issue 2; Pages: 38
Universe, Vol 3, Iss 2, p 38 (2017)
Universe
Universe, Vol 3, Iss 2, p 38 (2017)
Universe
In order to provide a better understanding of rotating universe models, and in particular the G\"{o}del universe, we discuss the relationship between cosmic rotation and perfect inertial dragging. In this connection, the concept of \emph{causal mass}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b705abb6eeb7e43bbcc46bbbd9533fe
Autor:
Øystein Elgarøy, Simen Braeck
We derive explicit and exact expressions for the physical velocity of a free particle comoving with the Hubble flow as measured by a static observer, and for the frequency shift of light emitted by a comoving source and received, again, by a static o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a7b1e87e8f31abeb58cafe58d55f739
https://hdl.handle.net/10642/1423
https://hdl.handle.net/10642/1423
Autor:
Simen Braeck, Øyvind Grøn
Within the theory of general relativity gravitational phenomena are usually attributed to the curvature of four-dimensional spacetime. In this context we are often confronted with the question of how the concept of ordinary physical three-dimensional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b25c861067a670a8bd57aa414f59d63
http://arxiv.org/abs/1204.0419
http://arxiv.org/abs/1204.0419
Autor:
Simen Braeck, Øyvind Grøn
Publikováno v:
The European Physical Journal Plus. 126
Recently Abramowicz and Bajtlik [ArXiv: 0905.2428 (2009)] have studied the twin paradox in Schwarzschild spacetime. Considering circular motion they showed that the twin with a non-vanishing 4-acceleration is older than his brother at the reunion and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1f187254b2567bd10c86884e570edc5
https://doi.org/10.1140/epjp/i2011-11079-7
https://doi.org/10.1140/epjp/i2011-11079-7
Publikováno v:
Physical Review E. 80
Thermal runaway instability induced by material softening due to shear heating represents a potential mechanism for mechanical failure of viscoelastic solids. In this work we present a model based on a continuum formulation of a viscoelastic material
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eaa7c5b18c43e46e002fa4b21d104da2
https://doi.org/10.1103/physreve.80.046105
https://doi.org/10.1103/physreve.80.046105
Publikováno v:
Journal of Physics: Conference Series. 635:092098
The interaction between super intense laser pulses and hydrogenlike systems is investigated. We aim to study cases where the field drives the electron up to velocities of v ~ 0.5c, where relativistic effects are believed to play a significant role. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f301500df71209ee6b80541dcc4b450
https://doi.org/10.1088/1742-6596/635/9/092098
https://doi.org/10.1088/1742-6596/635/9/092098
Autor:
Yuri Podladchikov, Simen Braeck
Publikováno v:
Physical review letters. 98(9)
The first theoretical estimate of the shear strength of a perfect crystal was given by Frenkel [Z. Phys. 37, 572 (1926)]. He assumed that as slip occurred, two rigid atomic rows in the crystal would move over each other along a slip plane. Based on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac041828bd0cfe254364707fd664865e
https://pubmed.ncbi.nlm.nih.gov/17359169
https://pubmed.ncbi.nlm.nih.gov/17359169