Results 81 to 90 of about 1,328,728 (267)
Mathematical Formalism in Cosmological Models of Gravity
Semina: Ciências Exatas e Tecnológicas, 2016 We analyze solutions to Friedmann-Robertson-Walker cosmologies in Brans-Dicke theory, where a scalar field is coupled to gravity. The cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant ...
Artigo Retratado
doaj +1 more source
On the generalized uncertainty principle and cosmology
International Journal of Modern Physics DIn this work, we study the effects of the Generalized Uncertainty Principle (GUP) in cosmology. We start with the Friedmann–Robertson–Walker (FRW) model endowed with a scalar field. After introducing the GUP modification to the model, we solve for the quantum and classical cases. Finally, we find the GUP-modified Friedmann equations.
Oscar López-Aguayo +2 more
openaire +2 more sources
Weyl\u27s principle, cosmic time and quantum fundamentalism [PDF]
, 2010 We examine the necessary physical underpinnings for setting up the cosmological standard model with a global cosmic time parameter. In particular, we discuss the role of Weyl's principle which asserts that cosmic matter moves according to certain ...
Zinkernagel, Henrik, Rugh, Svend E.
core
Children &Society, EarlyView.ABSTRACT Most research in Death Studies focuses on adult perspectives. Even when children are the intended focus, this research often remains adult‐centred due to the dominance of developmental psychology. A key concept underpinning this approach is the ‘mature death concept’ (MDC), a normative framework that assumes children's understanding of death ...
Renske Visser, Karin Murris
wiley +1 more source
The obsolescence of protected area categories in a polycrisis world
Conservation Biology, EarlyView.Abstract Current global conservation models face significant limitations in addressing the global polycrisis, and the constraints of the International Union for Conservation of Nature protected area (PA) classification system are part of the issue. The principles of the new conservation paradigm—governance, equity, and interculturality—are not viable ...
Pamela Esther Degele
wiley +1 more source
The Astrophysical JournalWe study the cosmological consequences of the extended uncertainty principle (EUP) by deriving modified Friedmann equations through thermodynamic arguments.
M. Roushan, N. Rashidi
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Similar or Different? Configurations of Authenticity Across Museum Types
Curator: The Museum Journal, EarlyView.ABSTRACT Authenticity is traditionally regarded as playing a crucial role in museums, science centers, and memorials. However, despite this fact, authenticity has very different meanings in different (institutional) settings. This complicates shared communications across museum practices.
S. Schwan +18 more
wiley +1 more source
Physics Letters BThe combination of quantum theory with the basic concepts of gravity leads to a modification of the uncertainty principle. To observe the effects of the modified uncertainty principle, it is necessary to choose a system in which gravity is very strong ...
S. Parsamehr
doaj +1 more source
The Holographic Principle in a Cosmological Setting [PDF]
, 2003 We study the holographic principle in a cosmological context. First, entropy bounds are derived from the holographic principle and applied within a Anti-de Sitter spacetime.
Savonije, Ivo Lothar
core
A critical note on time in the multiverse [PDF]
, 2013 In recent analyses of standard, single-universe, cosmology, it was pointed out that specific assumptions regarding the distribution and motion of matter must be made in order to set up the cosmological standard model with a global time parameter. Relying
Zinkernagel, Henrik +3 more
core +1 more source