Results 71 to 80 of about 115,140,986 (222)

Maxwell’s equations in the Myers-Perry geometry

Journal of High Energy Physics, 2017
We demonstrate separability of the Maxwell’s equations in the Myers-Perry-(A)dS geometry and derive explicit solutions for various polarizations. Application of our construction to the four-dimensional Kerr black hole leads to a new ansatz for the ...
Oleg Lunin
doaj   +1 more source

Supergravity, string theory and black holes

, 2010
In this thesis we study a large class of three-charge solutions of supergravity in various dimensions and duality frames. The solutions have the same asymptotic structure, supersymmetry and conserved charges as black holes and black rings with macroscopic horizons and finite entropy.
openaire   +2 more sources

Fermion perturbations in string theory black holes [PDF]

Classical and Quantum Gravity, 2011
In this paper we study fermion perturbations in four dimensional black holes of string theory, obtained either from a non-extreme configuration of three intersecting five-branes with a boost along the common string or from a non-extreme intersecting system of two two-branes and two five-branes.
Piedra, Owen Pavel Fernández, de Oliveira, Jeferson   +1 more
openaire   +2 more sources

Toward the Application of Multiaxial Failure Criteria: Mean Stress Sensitivity of Carbide‐Rich, High‐Alloy PM‐HIP Tool Steels Under Axial and Torsional Cyclic Loading

steel research international, EarlyView.
This study quantifies axial and torsional long‐life fatigue (LLF) behavior of three carbide‐rich PM‐HIP tool steels, correlating LLF strength with intrinsic defect size and cleanliness, thereby extracting material‐specific mean stress sensitivities and Haigh diagrams.
Lennart Mirko Scholl, Frederik Tegeder, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +4 more
wiley   +1 more source

Punching shear of unbonded post‐tensioned steel fiber reinforced concrete slabs: The fiber contribution

Structural Concrete, EarlyView.
Abstract Steel fiber reinforced concrete (SFRC) enhances the flexural capacity of flat slabs and, due to its effectiveness in statically redundant bi‐dimensional elements, represents a viable alternative to conventional reinforcement. Although numerous studies have investigated the flexural behavior of SFRC slabs with and without bonded reinforcement ...
Chiara Gaddi, Matteo Colombo, Marco di Prisco   +2 more
wiley   +1 more source

String condensation: nemesis of black holes? [PDF]

, 2015
This paper puts forward a conjecture that there are no black holes in M theory. We will show that a mechanism to prevent black hole formation is needed in 4 dimensions to make string theory a viable high energy model of quantum gravity.
Hewitt, M.
core  

Research on Self‐Identification Technology of Zero‐Value Insulators in Distribution Lines Based on Electroluminescence Effect

High Voltage, EarlyView.
ABSTRACT To address the issue of low detection accuracy for zero‐value insulators in distribution lines, this study proposes a novel method for detecting these insulators based on the electroluminescence effect. Through theoretical analysis and experimentation, it was found that the luminescence intensity of ZnS:Cu electroluminescent material varies ...
Jianghai Geng, Minghongtian Chen, Yunpeng Liu, Bo Peng, Yuming Zhang, Songsong Zhou, Ping Wang   +6 more
wiley   +1 more source

Black holes and solitons in string theory

, 1995
In this review I discuss various aspects of some of the recently constructed black hole and soliton solutions in string theory. I begin with the axionic instanton and related solutions of bosonic and heterotic string theory. The latter ten-dimensional solutions can be compactified to supersymmetric monopole, string and domain wall solutions which break
openaire   +3 more sources

On the black hole interior in string theory [PDF]

Journal of High Energy Physics, 2017
The potential behind the horizon of an eternal black hole in classical theories is described in terms of data that is available to an external observer -- the reflection coefficient of a wave that scatters on the black hole. In GR and perturbative string theory (in $α'$), the potential is regular at the horizon and it blows up at the singularity.
Ben-Israel, Roy, Giveon, Amit, Itzhaki, Nissan, Liram, Lior   +3 more
openaire   +4 more sources

Black Holes in String Theory

Interdisciplinary Journal of Research and Development, 2017
A black hole is a region of space time exhibiting such strong gravitational effects that nothing not even particles and electromagnetic radiation such as light can escape from inside it. From the theoretical point of view, black holes provide an intriguing arena in which to explore the challenges posed by the reconciliation of general relativity and ...
Ndriçim Sadikaj, Anila Duka
openaire   +1 more source