Results 201 to 210 of about 10,961 (308)

On Einstein metrics

Journal of Differential Geometry, 1974
openaire   +3 more sources

Spectral Metric and Einstein Functionals for Hodge-Dirac operator

We examine the metric and Einstein bilinear functionals of differential forms introduced in Adv.Math.,Vol.427,(2023)1091286, for Hodge-Dirac operator $d+δ$ on an oriented even-dimensional Riemannian manifold. We show that they reproduce these functionals
Zalecki, Paweł, Dąbrowski, Ludwik, Sitarz, Andrzej   +2 more
core   +1 more source

Diffusion of Carbamazepine in Hydrophobic Zeolites: A Comparative Study Using Classical and Machine‐Learned Potentials

Chemistry – A European Journal, EarlyView.
Can hydrophobic, shape‐selective zeolites efficiently remove the persistent pharmaceutical CBZ from water? This work moves beyond the static picture of interaction energies by modeling diffusion with umbrella sampling and machine‐learned potentials. Even high intrinsic diffusion barriers can be overcome through exergonic adsorption from water, yielding
Jakob Brauer, Richard Kendra, Carlos Bornes, Lukáš Grajciar, Michael Fischer   +4 more
wiley   +1 more source

The C 0 -inextendibility of some spatially flat FLRW spacetimes. [PDF]

Gen Relativ Gravit
Ling E.
europepmc   +1 more source

Cation‐Directed Host–Guest Assembly and Reversible Wheel to Cluster Interconversion in a 20‐Molybdate System

Chemistry – A European Journal, EarlyView.
The polyoxo‐20‐molybdate(VI) wheel [MoVI20O60{AsO2(CH3)2}12]12− (Mo20) can be prepared with or without a central guest in a controlled, cation‐directed fashion. When Mo20 is dissolved in water, it exhibits an immediate, quantitative, and fully reversible solution transformation to a tetranuclear Mo4 cluster, which transforms in the solid state again to
Arun Pal, Alisher Kuanysh, Vinaya Siby, Jana Hölscher, Nikolai Kuhnert, Albert Masip‐Sánchez, Xavier López, Josep M. Poblet, Maria Boltoeva, Pierre Bauduin, Mohamed Haouas, Emmanuel Cadot, Ulrich Kortz   +12 more
wiley   +1 more source

Linear Stability of the Slowly-Rotating Kerr-de Sitter Family. [PDF]

Ann PDE
Fang AJ.
europepmc   +1 more source

The viability of modified gravity theories

, 2009
PhDThis thesis studies the viability of classes of modified gravity (MG) theories based on generalisations of the Einstein-Hilbert action. Particular emphasis is given to f(R) theories in both the metric and Palatini formalisms, scalar-tensor theories ...
Uddin, Kotub
core  

Prism[5]MaxQ: A Sulfated Prism[5]Arene and Its Molecular Recognition Properties Toward a Panel of Quaternary Ammonium Guests

Chemistry – A European Journal, EarlyView.
We report the synthesis and characterization of a sulfated prism[5]arene host (Prism[5]MaxQ). Prism[5]MaxQ displays ultrahigh binding affinity (Ka up to 1012 M−1) toward hydrophobic (di)cations in phosphate‐buffered saline (PBS). The work positions Prism[5]MaxQ as a new member of the family of ultrahigh‐affinity hosts poised for use as a sequestrant in
Emmanuel A. Bazan‐Bergamino, Lyle Isaacs   +1 more
wiley   +1 more source

Master field equations for spherically symmetric gravitational fields beyond general relativity. [PDF]

Nat Commun
Carballo-Rubio R.
europepmc   +1 more source

Optimization of 3D‐Printed Structured Packings—Current State and Future Developments

Chemie Ingenieur Technik, EarlyView.
This paper gives an overview about structured packing development for distillation, surveying heuristic development cycles, computational fluid dynamics simulations, and additive manufacturing techniques. The emerging application of shape optimization to improve packings is emphasized, and its benefits, impact, and limitations are discussed.
Dennis Stucke, Sebastian Blauth, Christian Leithäuser, Thomas Grützner   +3 more
wiley   +1 more source