Results 41 to 50 of about 108,791 (169)
Advanced Science, EarlyView.Allenes emerge as powerful platforms for electrochemical functionalization through radical pathways. Selective radical addition at the central carbon triggers anodic oxidation and intramolecular cyclization, enabling efficient synthesis of oxazolines and oxazolidine‐2‐imines without external oxidants.
Pranjal Pyne +5 more
wiley +1 more source
Naked Singularities in the Vaidya Spacetime [PDF]
Progress of Theoretical Physics, 1984 Summary: We investigate the property of a singularity which is formed by the spherical collapse of pure radiation from past null infinity, in terms of the congruence of null geodesics in the Vaidya spacetime. When the initial increase of mass due to the inflow of radiation is not so fast, the so-called shell-focusing singularity appears at the center ...
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Global Spacetime Structure [PDF]
, 2011 Here, we outline the basic structure of relativistic spacetime and record a number of facts. We then consider a distinction between local and global spacetime properties and provide important examples of each.
Manchak, John Byron
core
The structure of quantum singularities on a Cauchy horizon
Journal of High Energy PhysicsSpacetime singularities pose a long-standing puzzle in quantum gravity. Unlike Schwarzschild, a generic family of black holes gives rise to a Cauchy horizon on which, even in the Hartle-Hawking state, quantum observables such as ⟨T μν ⟩ — the expectation
Arvin Shahbazi-Moghaddam
doaj +1 more source
Towards Black-Hole Singularity-Resolution in the Lorentzian Gravitational Path Integral
Universe, 2021 Quantum gravity is expected to resolve the singularities of classical general relativity. Based on destructive interference of singular spacetime-configurations in the path integral, we find that higher-order curvature terms may allow to resolve black ...
Johanna N. Borissova, Astrid Eichhorn
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British Educational Research Journal, EarlyView.Abstract In this paper, we explore how neurodivergent ways of being in early education are often gendered. The intersectionalities of gender and neurodivergence often lead to fixed expectations that perpetuate binary interpretations, pathologisations, missed diagnoses and a lack of curated support.
Ruth Churchill Dower, Hannah Hogarth
wiley +1 more source
, 2014 45 pages, LaTex; Invited Review article for the `Springer Handbook of Spacetime' (eds A. Ashtekar and V. Petkov)
openaire +2 more sources
On the classification of rational surface singularities
, 2012 A general strategy is given for the classification of graphs of rational surface singularities. For each maximal rational double point configuration we investigate the possible multiplicities in the fundamental cycle. We classify completely certain types
Stevens, Jan, Jan Stevens, Stevens, Jan,
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Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio
Journal of High Energy Physics, 2021 We study the model of four-dimensional Einstein-Maxwell-Λ theory minimally coupled to a massive charged self-interacting scalar field, parameterized by the quartic and hexic couplings, labelled by λ and β, respectively.
Yan Song, Tong-Tong Hu, Yong-Qiang Wang
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Quantum Black Holes and (Re)Solution of the Singularity
Universe, 2021 Classical general relativity predicts the occurrence of spacetime singularities under very general conditions. Starting from the idea that the spacetime geometry must be described by suitable states in the complete quantum theory of matter and gravity ...
Roberto Casadio
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