Results 91 to 100 of about 796,323 (348)

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Gravitational Wave Bursts from Collisions of Primordial Black Holes in Clusters

, 2010
The rate of gravitational wave bursts from the mergers of massive primordial black holes in clusters is calculated. Such clusters of black holes can be formed through phase transitions in the early Universe.
A. Cattaneo, A. Sesana, C. M. Will, H. Mouri, L. P. Grishchuk, L. Spitzer, M. Mapelli, M. Yu. Khlopov, M. Yu. Khlopov, S. G. Rubin, S. G. Rubin, S. G. Rubin, V. Dokuchaev, V. I. Dokuchaev, Y. Gao, Yu. N. Eroshenko   +15 more
core   +1 more source

Matrix Black Holes [PDF]

, 1997
Four and five dimensional extremal black holes with nonzero entropy have simple presentations in M-theory as gravitational waves bound to configurations of intersecting M-branes.
't Hooft G, Banks T, Banks T, Callan C G Jr, Cvetic M, de Wit B, Dijkgraaf R, Douglas M R, Emil Martinec, Fischler W, Ganor O, Ho P-M, Imamura Y, Jackson J D, Kim Y, Maldacena J, Martinec E, Martinec E, Miao Li, Motl L, Polhemus G, Russo J G, Schoutens K, Taylor W, Tseytlin A A   +24 more
core   +2 more sources

Black hole remnants [PDF]

Journal of High Energy Physics, 2019
Abstract We show that in asymptotically free mimetic gravity with limiting curvature the black hole singularity can be resolved and replaced by a static patch of de Sitter space. As a result of Hawking evaporation of these non-singular black holes, there remain stable remnants with vanishing Hawking temperature.
Ali H. Chamseddine, Viatcheslav Mukhanov, Tobias B. Russ   +2 more
openaire   +4 more sources

Photoswitchable Conductive Metal–Organic Frameworks

Advanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu, Mersad Mostaghimi, Abhinav Chandresh, Saibal Jana, Wolfgang Wenzel, Lars Heinke   +5 more
wiley   +1 more source

Implications of primordial black holes on the first stars and the origin of the super--massive black holes [PDF]

, 2009
If the cosmological dark matter has a component made of small primordial black holes, they may have a significant impact on the physics of the first stars and on the subsequent formation of massive black holes.
Abel, Abramowicz, Alcock, Alexander D. Dolgov, Bambi, Barkana, Begelman, Begelman, Binney, Bisnovatyi-Kogan, Bondi, Bromm, Bromm, Carr, Carr, Carr, Ciotti, Cosimo Bambi, Crawford, Dolgov, Douglas Spolyar, Freese, Freese, Gould, Haiman, Hawke, Hawking, Hawking, Hawking, Hawking, Heger, Hollenbach, Jedamzik, Katherine Freese, Li, MacFadyen, Marani, Marta Volonteri, Matsuda, McKee, Navarro, Nemiroff, Novikov, Omukai, Page, Page, Peebles, Pelupessy, Polnarev, Rubin, Sellwood, Seto, Shapiro, Silk, Spolyar, Springel, Tegmark, Tisserand, Volonteri, Volonteri, Yoshida, Yoshida, Zeldovich   +62 more
core   +1 more source

ACOUSTIC BLACK HOLES [PDF]

New Worlds in Astroparticle Physics, 2006
13 pages, 9 Figures, ReVTeX4. Based on a talk delivered at the Fifth Meeting on New Worlds in Astroparticle Physics (Faro, Portugal, 8-10 January 2005).
openaire   +2 more sources

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

New Estimates of the Spin and Accretion Rate of the Black Hole M87*

The Astrophysical Journal Letters
In this Letter, we use the imaging results of M87* from the Event Horizon Telescope (EHT) to calculate the rotational velocity of the inner edge of the accretion disk and find a value of ∼0.14 c .
Michael Drew, Joshua S. Stanway, Brett A. Patterson, Timothy J. Walton, Derek Ward-Thompson   +4 more
doaj   +1 more source

Tidal Forces Around Black-Bounce-Reissner–Nordström Black Hole

Universe
The central singularity present in black hole (BH) spacetimes arising in the general theory of relativity (GR) can be avoided by using various methods. In the present work we have investigated the gravitational effect of one of such spacetime known as a ...
Rashmi Uniyal
doaj   +1 more source