Results 101 to 110 of about 84,386 (305)

The topology of asymptotically Euclidean static perfect fluid space-time [PDF]

, 2017
In this thesis we prove that a (geodesically) complete, asymptotically Euclidean, static perfect fluid space-time with connected fluid reglon and satisfying the time-like convergence condition lS diffeomorphic to R³ x R .
Masood-ul-Alam, A. K. M
core   +1 more source

Higher-dimensional inhomogeneous perfect fluid collapse in f(R) gravity

European Physical Journal C: Particles and Fields, 2017
This paper is about the $$n+2$$ n + 2 -dimensional gravitational contraction of an inhomogeneous fluid without heat flux in the framework of a f(R) metric theory of gravity.
G. Abbas, M. S. Khan, Zahid Ahmad, M. Zubair   +3 more
doaj   +1 more source

Geometry of static w = - 1 / 5 perfect fluid spheres in general relativity. [PDF]

Eur Phys J C Part Fields, 2022
Fazlpour B, Banijamali A, Faraoni V.
europepmc   +1 more source

Twisting in Hamiltonian flows and perfect fluids

Inventiones mathematicae
32 pages, 10 ...
Drivas, Theodore D., Elgindi, Tarek M., Jeong, In-Jee   +2 more
openaire   +3 more sources

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

Advanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll, Ivan Pinto‐Huguet, Enzo Rotunno, Thomas Galvani, Catalina Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, Yann‐Michel Niquet, Martin Børstad Eriksen, Sara Martí‐Sánchez, Georgios Katsaros, Giordano Scappucci, Peter Krogstrup, Giovanni Isella, Andreu Cabot, Gonzalo Merino, Pablo Ordejón, Stephan Roche, Vincenzo Grillo, Jordi Arbiol   +19 more
wiley   +1 more source

The Spacetime Geodesy of Perfect Fluid Spheres

Symmetry
Herein we shall argue for the utility of “spacetime geodesy”, a point of view where one delays as long as possible worrying about dynamical equations, in favour of the maximal utilization of both symmetries and geometrical features. This closely parallels Weinberg’s distinction between “cosmography” and “cosmology”, wherein maximal utilization of both ...
Christopher Simmonds, Matt Visser
openaire   +2 more sources

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

A solution for non-stationary, slowly-rotating, cylindrically symmetric, perfect fluid universe

Ruhuna Journal of Science, 2007
An analytic solution for the relativistic field equations is obtained for a non-stationary, slowly rotating, cylindrically symmetric distribution of perfect fluid universe. The new metric, is regular with the exception at the point r = 0.
Wijewickrema P.K.C.M., Wijayasiri M.P.A
doaj  

Conformally Invariant Gravity and Gravitating Mirages

Universe
The action of an ideal fluid in Euler variables with a variable number of particles is used for the phenomenological description of the processes of particle creation in strong external fields.
Victor Berezin, Inna Ivanova
doaj   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source