Results 31 to 40 of about 697,282 (295)
“Observables” in causal set cosmology [PDF]
Physical Review D, 2003 LaTeX, 1+19 pages, 2 ...
Brightwell, Graham +4 more
openaire +2 more sources
Observational aspects of an inhomogeneous cosmology [PDF]
Proceedings of VIII International Workshop on the Dark Side of the Universe — PoS(DSU 2012), 2013 One of the biggest mysteries in cosmology is Dark Energy, which is required to explain the accelerated expansion of the universe within the standard model. But maybe one can explain the observations without introducing new physics, by simply taking one step back and re-examining one of the basic concepts of cosmology, homogeneity. In standard cosmology,
Saulder, Christoph +2 more
openaire +3 more sources
Temporal and Spectral Variability of OJ 287 before the April–June 2020 Outburst
Galaxies, 2020 We present the results of a temporal and spectral study of the BL Lacertae object OJ 287 in optical, UV, and X-ray bands with observations performed by Swift satellite during September 2019–March 2020.
Nibedita Kalita +2 more
doaj +1 more source
Cross-correlating Dark Sirens and Galaxies: Constraints on H 0 from GWTC-3 of LIGO–Virgo–KAGRA
The Astrophysical JournalWe apply the cross-correlation technique to infer the Hubble constant ( H _0 ) of the Universe using gravitational-wave (GW) sources without electromagnetic counterparts (dark sirens) from the third GW Transient Catalog (GWTC-3) and the photometric ...
Suvodip Mukherjee +3 more
doaj +1 more source
Non-standard Models and the Sociology of Cosmology [PDF]
, 2013 I review some theoretical ideas in cosmology different from the standard "Big Bang": the quasi-steady state model, the plasma cosmology model, non-cosmological redshifts, alternatives to non-baryonic dark matter and/or dark energy, and others ...
Lopez-Corredoira, Martin
core
Local Solvent Ordering Drives Supramolecular Chirality Inversion
Advanced Science, EarlyView.Local solvent organization is shown to govern supramolecular chirality by selecting distinct chiral assembly pathways. A subtle change in water‐DMSO composition reverses the helical sense of a chiral perylene bisimide, while heating induces an irreversible thermal inversion to a more stable enantiomorph.
Triza Pal +4 more
wiley +1 more source
Observational constraints on Rastall’s cosmology [PDF]
The European Physical Journal C, 2013 Rastall's theory is a modification of General Relativity, based on the non-conservation of the stress-energy tensor. The latter is encoded in a parameter $γ$ such that $γ= 1$ restores the usual $\nabla_νT^{μν} = 0$ law. We test Rastall's theory in cosmology, on a flat Robertson-Walker metric, investigating a two-fluid model and using the type Ia ...
C. E. M. Batista +3 more
openaire +3 more sources
Programmable Sequential 4D Actuation in Multistable Kirigami Metamaterials
Advanced Science, EarlyView.This study presents a modular kirigami metamaterial framework enabling programmable multistability and sequential 4D actuation. By coupling geometry‐controlled multistability with material‐dependent recovery kinetics, spatiotemporal deformation can be precisely programmed.
Eui‐Hyun Kim +3 more
wiley +1 more source
Sociology of Modern Cosmology [PDF]
, 2008 Certain results of observational cosmology cast critical doubt on the foundations of standard cosmology but leave most cosmologists untroubled. Alternative cosmological models that differ from the Big Bang have been published and defended by heterodox ...
López Corredoira, Martín
core
The Made‐in‐Africa Evaluation framework: A decolonial approach to program evaluation
American Journal of Community Psychology, EarlyView.Abstract The Made in Africa Evaluation (MAE) framework is a decolonial approach to program evaluation developed by African evaluators over the past 14 years. MAE may be appropriate to community psychologists who practice program evaluation or conduct research in Africa, but little is known about its implementation.
Takatso Sibanda, Robin Lin Miller
wiley +1 more source