Results 61 to 70 of about 62,947 (343)

Non-marginally bound inhomogeneous dust collapse in higher dimensional space-time [PDF]

, 2002
We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by a self-similar higher dimensional Tolman-Bondi space-time.
A. BANERJEE, S. G. GHOSH, Tipler F. J.
core   +2 more sources

Geometrically Templated, Ultra‐Lightweight and High Strength Soap Films from Lyotropic Liquid Crystalline Graphene Oxide/Polymer Composites

Advanced Functional Materials, EarlyView.
Shellular materials form spontaneously by dip coating the primitive triply periodic minimal surface (TPMS) wireframe in an aqueous solution of lyotropic liquid crystalline graphene oxide (GO) nanosheets mixed with polymers. Regulated by surface tension, GO nanosheets align on the polymer soap film as the stress builds up during drying.
Yinding Chi, Yuchong Gao, Mostafa Akbari, Kun‐Hao Yu, Kun‐Yu Wang, Mohit Patel, Shouhong Fan, Ziyun Zhang, Masoud Akbarzadeh, Shu Yang   +9 more
wiley   +1 more source

On Gravitational Fields in Superconductors

Frontiers in Physics, 2022
DeWitt’s theory on superconductors in gravitational fields is re-derived in the low velocity limit and linear gravity from the Klein-Gordon equation for an ensemble of charged spinless bosons. The solution has a phase singularity that gives rise to boson
Giorgio Papini
doaj   +1 more source

Naked Singularities in Spherically Symmetric Inhomogeneous Tolman-Bondi Dust Cloud Collapse [PDF]

, 1993
We investigate the occurrence and nature of naked singularity for the inhomogeneous gravitational collapse of Tolman-Bondi dust clouds.It is shown that the naked singularities form at the center of the collapsing cloud in a wide class of collapse models ...
A. Ori, A. Ori, A. Papapetrou, B. Waugh, C. J. S. Clarke, D. Christodoulou, D. M. Eardley, D. M. Eardley, D. M. Eardley, F. J. Tipler, F. J. Tipler, F. Verhulst, G. Grillo, H. Bondi, H. Muller, I. H. Dwivedi, I. H. Dwivedi, I. H. Dwivedi, I. H. Dwivedi, J. Hellaby, J. Oppenheimer, J. P. S. Lemos, K. Lake, K. Lake, K. Rajagopal, P. S. Joshi, P. S. Joshi, P. S. Joshi, P. S. Joshi, P. S. Joshi, P. S. Joshi, R. C. Tolman, R. Hagedorn, R. P. A. C. Newman, R. P. A. C. Newman, R. Penrose, R. Penrose, R. Penrose, T. Davies, T. Nakamura, W. Israel, W. Israel, Y. Kuroda   +42 more
core   +2 more sources

Liquid Metals as Initiators of Free‐Radical Polymerization of Hydrogels: A Perspective

Advanced Functional Materials, EarlyView.
Gallium‐based liquid metals initiate free radical polymerization to form hydrogels without the use of toxic molecular initiators. In addition to initiating polymerization, they can act as crosslinkers, yielding softer, more extensible, and tougher hydrogels than those formed with conventional initiators.
Syed Ahmed Jaseem, Pooria Rahmani, Tushar Sakorikar, Jinwoo Ma, Omar Almutairi, Maxim A. Voinov, Alex I. Smirnov, Baihang Chen, Michael D. Dickey   +8 more
wiley   +1 more source

What Is a Singularity in Geometrized Newtonian Gravitation? [PDF]

Philosophy of Science, 2014
I discuss singular space-times in the context of the geometrized formulation of Newtonian gravitation. I argue first that geodesic incompleteness is a natural criterion for when a model of geometrized Newtonian gravitation is singular, and then I show that singularities in this sense arise naturally in classical physics by stating and proving a ...
openaire   +4 more sources

The Effect of Amino Acids on the Formation of Amorphous Calcium Carbonate Nanoparticles

Advanced Functional Materials, EarlyView.
Biomineral formation often proceeds via the assembly of amorphous calcium carbonate (ACC) nanoparticles with narrow size distributions. Using in situ SAXS coupled to a stopped‐flow device, we follow synthetic ACC formation with a 10 ms time resolution and show that amino acids narrow the size distribution at low supersaturation, highlighting their key ...
Lucas Kuhrts, Hadar Shaked, Johanna Sklar, Almog Sulam, Iryna Polishchuk, Elena Prudnikov, Gouranga Manna, Michael Sztucki, Sylvain Prevost, Alexander Katsman, Boaz Pokroy   +10 more
wiley   +1 more source

DeWitt boundary condition is consistent in Hořava-Lifshitz quantum gravity

Physics Letters B, 2022
In quantum cosmology the DeWitt boundary condition is a proposal to set the wave function of the universe to vanish at the classical big-bang singularity.
Hiroki Matsui, Shinji Mukohyama, Atsushi Naruko   +2 more
doaj   +1 more source

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

Quantum solitonic wave-packet of a meso-scopic system in singularity free gravity

Nuclear Physics B, 2018
In this paper we will discuss how to localise a quantum wave-packet due to self-gravitating meso-scopic object by taking into account gravitational self-interaction in the Schrödinger equation beyond General Relativity.
Luca Buoninfante, Gaetano Lambiase, Anupam Mazumdar   +2 more
doaj   +1 more source