Results 71 to 80 of about 120,404 (314)
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 +5 more
wiley +1 more source
BLACK HOLE UNCERTAINTIES [PDF]
Modern Physics Letters A, 1993 In this work the quantum theory of two-dimensional dilaton black holes is studied using the Wheeler-De Witt equation. The solutions correspond to wave functions of the black hole. It is found that for an observer inside the horizon, there are uncertainty relations for the black hole mass and a parameter in the metric determining the Hawking flux. Only
openaire +4 more sources
Anisotropic matter and nonlinear electromagnetics black holes
European Physical Journal C: Particles and FieldsIt is shown that anisotropic matter black holes with two parameters w and K correspond to nonlinear electrodynamics (NED) black holes with power-index s and charge term $$\xi (s,q)$$ ξ ( s , q ) by introducing a NED term.
Wonwoo Lee, Yun Soo Myung
doaj +1 more source
Stability of scalarized charged black holes in the Einstein–Maxwell–Scalar theory
European Physical Journal C: Particles and Fields, 2019 We analyze the stability of scalarized charged black holes in the Einstein–Maxwell–Scalar (EMS) theory with quadratic coupling. These black holes are labelled by the number of $$n=0,1,2,\ldots $$ n=0,1,2,… , where $$n=0$$ n=0 is called the fundamental ...
Yun Soo Myung, De-Cheng Zou
doaj +1 more source
Scalarized charged black holes in the Einstein-Maxwell-Scalar theory with two U(1) fields
Physics Letters B, 2020 We investigate scalarized charged black holes in the Einstein-Maxwell-Scalar theory with two U(1) fields inspired by the N=4 supergravity. From the onset of the spontaneous scalarization (tachyonic instability of Reissner-Nordström black hole), these ...
Yun Soo Myung, De-Cheng Zou
doaj +1 more source
Higher-dimensional black holes: Braneworld stars and Hawking radiation. [PDF]
, 2007 In this thesis two aspects of braneworld models are studied. A new attempt at finding the metric of a braneworld black hole within the second Randall-Sundrum model is explored. Branes containing distributions of perfect fluid are embedded in a variety of
Creek, Simon
core
Generating Geodesic Flows and Supergravity Solutions [PDF]
, 2009 We consider the geodesic motion on the symmetric moduli spaces that arise after timelike and spacellike reductions of supergravity theories. The geodesics correspond to timelike respectively spacelike p-brane Solutions when they are lifted over a p ...
Trigiante, Mario +10 more
core +1 more source
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 +5 more
wiley +1 more source
Mass Functions of Supermassive Black Holes across Cosmic Time
Advances in Astronomy, 2012 The black hole mass function of supermassive black holes describes the evolution of the distribution of black hole mass. It is one of the primary empirical tools available for mapping the growth of supermassive black holes and for constraining ...
Brandon C. Kelly, Andrea Merloni
doaj +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.
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