Results 81 to 90 of about 947,753 (292)

Shadow and quasinormal modes of the Kerr–Newman–Kiselev–Letelier black hole

European Physical Journal C: Particles and Fields, 2022
We investigate the null geodesics and the shadow cast by the Kerr–Newman–Kiselev–Letelier (KNKL) black hole for the equation of state parameter $$\omega _q=-2/3$$ ω q = - 2 / 3 and for different values of the spacetime parameters, including the ...
Farruh Atamurotov, Ibrar Hussain, G. Mustafa, Kimet Jusufi   +3 more
doaj   +1 more source

Enhancing Bubble Removal in Geometry‐Optimized Electrodes

Advanced Engineering Materials, EarlyView.
3D‐printed lattice electrodes outperform stochastic foams in alkaline water electrolysis despite 20%–25% lower surface area. Straight flow channels generate Venturi‐like bubble entrainment, suppressing gas accumulation that renders foam interiors electrochemically inactive.
Florian Wiesner, Peter Förster, Alexander Limper, Anselm Brodersen, Matthias Wessling, John Linkhorst   +5 more
wiley   +1 more source

Atmospheric Limitations for High-frequency Ground-based Very Long Baseline Interferometry

The Astrophysical Journal
Very long baseline interferometry (VLBI) provides the highest-resolution images in astronomy. The sharpest resolution is nominally achieved at the highest frequencies, but as the observing frequency increases, so too does the atmospheric contribution to ...
Dominic W. Pesce, Lindy Blackburn, Ryan Chaves, Sheperd S. Doeleman, Mark Freeman, Sara Issaoun, Michael D. Johnson, Greg Lindahl, Iniyan Natarajan, Scott N. Paine, Daniel C. M. Palumbo, Freek Roelofs, Paul Tiede   +12 more
doaj   +1 more source

Optical and thermodynamic properties of a rotating dyonic black hole spacetime in $${\mathcal {N}} = 2, U(1)^2$$ N = 2 , U ( 1 ) 2 gauged supergravity

European Physical Journal C: Particles and Fields, 2021
The null geodesics and the distance of closest approach for photon around a rotating dyonic black hole in $${\mathcal {N}} = 2, U(1)^2$$ N = 2 , U ( 1 ) 2 gauged supergravity is studied.
Prateek Sharma, Hemwati Nandan, Uma Papnoi, Arindam Kumar Chatterjee   +3 more
doaj   +1 more source

Distorted 5-dimensional vacuum black hole

, 2010
In this paper we study how the distortion generated by a static and neutral distribution of external matter affects a 5-dimensional Schwarzschild-Tangherlini black hole.
A. G. Doroshkevich, Andrey A. Shoom, C. W. Misner, Don N. Page, G. Arfken, J. D. Jackson, J. M. Maldacena, K. I. Ramachandran, L. A. Mysak, L. D. Landau, L. P. Eisenhart, M. Abramowitz, R. Emparan, S. Chandrasekhar, Shohreh Abdolrahimi, V. A. Belinskii, V. A. Belinsky, V. A. Belinsky, V. P. Frolov   +18 more
core   +1 more source

Black hole graybody factor and black hole entropy [PDF]

Physical Review D, 1999
15 pages, RevTex, version to appear in ...
openaire   +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

Experimental Characterization of Mycelium‐Based Composites Under Multiple Loading Conditions

Advanced Engineering Materials, EarlyView.
This study examines the mechanical response of mycelium‐based composites under compression, shear, and tension using mechanical testing and imaging methods. The comparison between unpressed and hot‐pressed specimens shows that hot pressing is associated with higher compression and shear stiffnesses.
Shaghayegh Elahi, Kimiya Tajik, Harvey Shaw, Matti Isakov, Sami Pajunen, Lauri Rautkari   +5 more
wiley   +1 more source

Hierarchical Interferometric Bayesian Imaging

The Astrophysical Journal
Very long baseline interferometry (VLBI) achieves the highest angular resolution in astronomy. VLBI measures corrupted Fourier components, known as visibilities.
Paul Tiede, William Moses, Valentin Churavy, Michael D. Johnson, Dominic W. Pesce, Lindy Blackburn, Peter Galison   +6 more
doaj   +1 more source

Geometry of Higher-Dimensional Black Hole Thermodynamics

, 2006
We investigate thermodynamic curvatures of the Kerr and Reissner-Nordstr\"om (RN) black holes in spacetime dimensions higher than four. These black holes possess thermodynamic geometries similar to those in four dimensional spacetime.
C. W. Misner, D. A. Johnston, IoP, Jan E. Åman, Narit Pidokrajt, V. P. Frolov   +5 more
core   +1 more source