Results 51 to 60 of about 63,762 (335)
Singularities in quantum corrected space-times
Physics Letters B, 2020 In this paper we consider a static and regular fluid generating a locally spherically symmetric and time-independent space-time and calculate the leading quantum corrections to the metric to first order in curvature.
Xavier Calmet +2 more
doaj +1 more source
Pulsar timing array observations as possible hints for nonsingular cosmology
European Physical Journal C: Particles and Fields, 2023 Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). If interpreted as primordial gravitational waves (GWs), the signal favors a strongly blue-tilted spectrum.
Mian Zhu, Gen Ye, Yong Cai
doaj +1 more source
Nature of Singularities in Gravitational Collapse [PDF]
Progress of Theoretical Physics Supplement, 1999 We discuss several aspects of cosmic censorship hypothesis. There is evidence both in favor and against the hypothesis. On one hand one can prove that cosmic censorship holds in several special cases and on the other hand there is a number of special solutions of Einstein equations in which it is violated.
openaire +2 more sources
Advanced Functional Materials, EarlyView.Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana +2 more
wiley +1 more source
Gravitational dipole moment from an exact solution with torsion
New Journal of Physics, 2020 Dipole fields are common in electromagnetism and may be viewed as the result of a positive and negative charge (or pole) which are close together. A dipole field in gravity is not expected to exist because negative mass has never been observed.
R T Hammond
doaj +1 more source
Gravitational collapse of a Hagedorn fluid in Vaidya geometry [PDF]
, 2003 The gravitational collapse of a high-density null charged matter fluid, satisfying the Hagedorn equation of state, is considered in the framework of the Vaidya geometry.
A. Ishibashi +49 more
core +2 more sources
Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids
Advanced Functional Materials, EarlyView.This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow +9 more
wiley +1 more source
Quantum vacuum effects on the formation of black holes
Journal of High Energy Physics, 2023 We study the backreaction of quantum fields induced through the vacuum polarization and the conformal anomaly on the collapse of a thin shell of dust. It is shown that the final fate of the collapse process depends on the physical properties of the shell,
Moslem Shafiee, Yousef Bahrampour
doaj +1 more source
The late-time singularity inside non-spherical black holes
, 1998 It was long believed that the singularity inside a realistic, rotating black hole must be spacelike. However, studies of the internal geometry of black holes indicate a more complicated structure is typical. While it seems likely that an observer falling
A. Bonanno +39 more
core +1 more source
Mass-Inflation in Dynamical Gravitational Collapse of a Charged Scalar-Field [PDF]
, 1998 We study the inner-structure of a charged black-hole which is formed from the gravitational collapse of a self-gravitating charged scalar-field. Starting with a regular spacetime, we follow the evolution through the formation of an apparent horizon, a ...
A. Ori +21 more
core +3 more sources