Results 111 to 120 of about 707,832 (374)

Formation and evaporation of an electrically charged black hole in conformal gravity

European Physical Journal C: Particles and Fields, 2018
Extending previous work on the formation and the evaporation of black holes in conformal gravity, in the present paper we study the gravitational collapse of a spherically symmetric and electrically charged thin shell of radiation.
Cosimo Bambi, Leonardo Modesto, Shiladitya Porey, Lesław Rachwał   +3 more
doaj   +1 more source

Tapered Pillar Design for High‐Precision Force Readout in Miniaturized Engineered Heart Tissues From Human Pluripotent Stem Cells

Advanced Healthcare Materials, EarlyView.
Engineered heart tissues (EHTs) are a valuable approach in capturing human cardiac physiology and drug responses in vitro. Here, a novel tapered pillar design is developed in an EHT platform to confine tissues in a predefined position‐ at the middle of the pillar height.
Milica Dostanić, Maury Wiendels, Laura M. Windt, Mervyn P.H. Mol, Francijna E. van den Hil, Richard P. Davis, Valeria Orlova, Berend J. van Meer, Massimo Mastrangeli, Christine L. Mummery   +9 more
wiley   +1 more source

Singularities and horizons in the collisions of gravitational waves [PDF]

Physical Review D, 1989
It is well known that when gravitational plane waves propagating and colliding in an otherwise flat background interact they produce singularities. In this paper we explore the structure of the singularities produced in the collisions of arbitrarily polarized gravitational plane waves and we consider the problem of whether (or under what conditions ...
openaire   +5 more sources

Singularity in Gravitational Collapse of Plane Symmetric Charged Vaidya Spacetime

, 2010
We study the final outcome of gravitational collapse resulting from the plane symmetric charged Vaidya spacetime. Using the field equations, we show that the weak energy condition is always satisfied by collapsing fluid.
AISHA SIDDIQA, D'Inverno R., Joshi P. S., Kramer D., M. SHARIF, Papapetrou A., Penrose R., Sharma A. K., Virbhadra K. S., Zade S. S.   +9 more
core   +1 more source

Big bang of the brane universe [PDF]

, 2001
Big bang of the Friedmann-Robertson-Walker (FRW)-brane universe is studied. In contrast to the spacelike initial singularity of the usual FRW universe, the initial singularity of the FRW-brane universe is point-like from the viewpoint of causality ...
A. Lukas, A. Lukas, A. Lukas, C. Csáki, D. Ida, D. Lynden-Bell, D.J.H. Chung, E.J. Squires, G.W. Gibbons, H. Ishihara, Hideki Ishihara, J. Garriga, J. Rosen, J.M. Cline, L. Randall, M. Gogberashvili, M. Gogberashvili, M. Visser, P. Binétruy, P. Binétruy, P. Horava, T. Shiromizu, V.A. Rubakov, W. Israel   +23 more
core   +3 more sources

Controlling Intestinal Organoid Polarity using Synthetic Dynamic Hydrogels Decorated with Laminin‐Derived IKVAV Peptides

Advanced Healthcare Materials, EarlyView.
Design rules are presented to control intestinal organoid polarity in fully synthetic hydrogels. The laminin‐derived IKVAV sequence is crucial to obtain correct intestinal organoid polarity. Increasing hydrogel dynamics further supports the growth of correctly polarized intestinal organoids, while a bulk level of stiffness (G’ ≈ 0.7 kPa) is crucial to ...
Laura Rijns, Joost A. P. M. Wijnakker, Victor A. Veenbrink, Riccardo Bellan, Fenna W. B. Craenmehr, Simone I. S. Hendrikse, Johnick F. van Sprang, Wim de Lau, E. W. Meijer, Hans Clevers, Patricia Y. W. Dankers   +10 more
wiley   +1 more source

Particle motion and tidal force in a non-vacuum-charged naked singularity

European Physical Journal C: Particles and Fields
We investigate the gravitational field of a charged, non-vacuum, non-rotating, spherically symmetric body of mass M assuming a static solution to the Einstein–Maxwell field equations.
Divyesh P. Viththani, Ashok B. Joshi, Tapobroto Bhanja, Pankaj S. Joshi   +3 more
doaj   +1 more source

Gravitational perfect fluid collapse in Gauss–Bonnet gravity

European Physical Journal C: Particles and Fields, 2017
The Einstein Gauss–Bonnet theory of gravity is the low-energy limit of heterotic super-symmetric string theory. This paper deals with gravitational collapse of a perfect fluid in Einstein–Gauss–Bonnet gravity by considering the Lemaitre–Tolman–Bondi ...
G. Abbas, M. Tahir
doaj   +1 more source

The Singularity in Generic Gravitational Collapse is Spacelike, Local and Oscillatory [PDF]

, 1998
A longstanding conjecture by Belinskii, Khalatnikov and Lifshitz that the singularity in generic gravitational collapse is spacelike, local and oscillatory is explored analytically and numerically in spatially inhomogeneous cosmological space–times. With
B. Berger, D. Garfinkle, J. Isenberg, V. Moncrief, M. Weaver   +4 more
semanticscholar   +1 more source

3D Printing Strategies for Bioengineering Human Cornea

Advanced Healthcare Materials, EarlyView.
This review highlights recent progress in 3D bioprinting strategies for engineering human corneas. Key aspects include the replication of corneal transparency, curvature, and biomechanical properties, alongside innovations in recent advancements in 3D printing methods, which benefit in overcoming current challenges.
Yunong Yuan, Khoon S. Lim, Gerard Sutton, Gordon G. Wallace, Jingjing You   +4 more
wiley   +1 more source