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pro vyhledávání: '"Trapped surface"'
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Akademický článek
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Avramenko Diode Circuit Topology for Microwave Energy Harvesting in Goubau Line and Wireless Mediums
Publikováno v:
IEEE Access, Vol 6, Pp 18883-18893 (2018)
Wireless energy harvesting at microwave frequencies is a known challenge. The transmission medium to support delivery of a wireless energy is normally an insulator that conducts mainly a displacement current. However, Nikola Tesla has hinted that an
Externí odkaz:
https://doaj.org/article/755eb3e4fb1d4f8bb6d07850498e2542
Publikováno v:
IEEE Access, Vol 5, Pp 21873-21884 (2017)
This paper explores the feasibility of wireless energy harvesting by direct voltage multiplication on lateral waves. Whilst free space is undoubtedly a known medium for wireless energy harvesting, space waves are too attenuated to support realistic t
Externí odkaz:
https://doaj.org/article/c8696d99695245a6ab12f1a3a803dfa4
Autor:
Kristof Dekimpe, Joeri Van der Veken
Publikováno v:
Axioms, Vol 9, Iss 2, p 60 (2020)
A marginally trapped surface in a spacetime is a Riemannian surface whose mean curvature vector is lightlike at every point. In this paper we give an up-to-date overview of the differential geometric study of these surfaces in Minkowski, de Sitter, a
Externí odkaz:
https://doaj.org/article/cbe6785b7a264078963f74d2727d0dcd
Publikováno v:
Class.Quant.Grav.
Class.Quant.Grav., 2023, 40 (13), pp.135003. ⟨10.1088/1361-6382/accccd⟩
Class.Quant.Grav., 2023, 40 (13), pp.135003. ⟨10.1088/1361-6382/accccd⟩
Non-singular black holes models can be described by modified classical equations motivated by loop quantum gravity. We investigate what happens when the sine function typically used in the modification is replaced by an arbitrary bounded function, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6b4fc9c0737fc5c49c0a726fd202f4d
http://arxiv.org/abs/2212.06708
http://arxiv.org/abs/2212.06708
Akademický článek
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Autor:
Henri P. Roesch
Publikováno v:
Annales Henri Poincaré. 22:1937-1978
In Roesch (Proof of a null penrose conjecture using a new quasi-local mass, arXiv:1609.02875 [gr-qc], 2016), the notion of Double Convexity for a foliation of a conical null hypersurface was introduced to give a proof, if satisfied, of the Null Penro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::814d001ee7424dc0fa88100c5bb2d080
https://doi.org/10.1007/s00023-021-01047-y
https://doi.org/10.1007/s00023-021-01047-y
Autor:
Bin Guo, Samir D. Mathur
Publikováno v:
Int.J.Mod.Phys.D
Int.J.Mod.Phys.D, 2022, 31 (14), pp.2242009. ⟨10.1142/S0218271822420093⟩
Int.J.Mod.Phys.D, 2022, 31 (14), pp.2242009. ⟨10.1142/S0218271822420093⟩
In several approaches to evading the information paradox, the semiclassical black hole is replaced by an Exotic Compact Object (ECO). It has been conjectured that gravitational waves emitted by the merger of ECOs can reflect off the ECOs and produce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e80ac171294523a04b5875dec91bf09
http://arxiv.org/abs/2205.10921
http://arxiv.org/abs/2205.10921
Autor:
Feng Yuan
Publikováno v:
Chinese Science Bulletin. 65:4161-4168
The 2020 Nobel Prize in Physics has been awarded to Roger Penrose, Reinhard Genzel and Andrea Ghez for their discoveries related to black holes. One half of the Prize has been awarded to Roger Penrose “for the discovery that black hole formation is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36ec6909b30b2d42e454699e14f10e40
https://doi.org/10.1360/tb-2020-1319
https://doi.org/10.1360/tb-2020-1319