Results 81 to 90 of about 73,082 (280)

Remarks on the Myers-Perry and Einstein Gauss-Bonnet Rotating Solutions

open access: yes, 2010
The Kerr-type solutions of the five-dimensional Einstein and Einstein-Gauss-Bonnet equations look pretty similar when written in Kerr-Schild form. However the Myers-Perry spacetime is circular whereas the rotating solution of the Einstein-Gauss-Bonnet ...
ANDRES ANABALÓN   +5 more
core   +3 more sources

Holonomy of Einstein Lorentzian manifolds [PDF]

open access: yesClassical and Quantum Gravity, 2010
The classification of all possible holonomy algebras of Einstein and vacuum Einstein Lorentzian manifolds is obtained. It is shown that each such algebra appears as the holonomy algebra of an Einstein (resp., vacuum Einstein) Lorentzian manifold, the direct constructions are given.
openaire   +3 more sources

How Donor–Bridge–Acceptor Orientation and Chemical Modification Affect the Thermally Activated Delayed Fluorescence Abilities of Boron‐Based Emitters

open access: yesChemPhotoChem, EarlyView.
Quantum chemistry has been used to investigate the key factors that determine the (reverse) intersystem crossing processes in boron‐based organic light‐emitting diode emitters. The ortho‐linked through‐space charge‐transfer compounds exhibit smaller singlet–triplet splittings than their para‐linked through‐bond charge‐transfer regioisomers.
Jeremy M. Kaminskia   +2 more
wiley   +1 more source

Rigidity of Weak Einstein-Randers Spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis
The Randers metrics are popular metrics similar to the Riemannian metrics, frequently used in physical and geometric studies. The weak Einstein-Finsler metrics are a natural generalization of the Einstein-Finsler metrics.
Behnaz Lajmiri   +2 more
doaj   +1 more source

Physics‐based inverse modeling of battery degradation with Bayesian methods

open access: yesChemSusChem, Accepted Article.
To further improve Lithium‐ion batteries (LiBs), a profound understanding of complex battery processes is crucial. Physical models offer understanding but are difficult to validate and parameterize. Therefore, automated machine‐learning methods (ML) are necessary to evaluate models with experimental data. Bayesian methods, e.g., Expectation Propagation
Micha Philipp   +3 more
wiley   +1 more source

Excited State Branching Processes in a Ru(II)-Based Donor-Acceptor-Donor System. [PDF]

open access: yesChemistry
The photoinduced electron transfer processes in a Ru(II)‐based push–pull–push architecture which combines an inorganic and organic chromophore are elucidated in a joint spectroscopic‐theoretical approach. The applied design concept allows the excited state to be localized away from the metal onto the organic chromophore.
Yang G   +10 more
europepmc   +2 more sources

Dielectrophoresis Tutorial: Inspired by Hatfield's 1924 Patent and Boltzmann's Theory and Experiments of 1874

open access: yesELECTROPHORESIS, EarlyView.
ABSTRACT The first patent to describe dielectrophoresis (DEP) as a means and process to separate particles from a mixture was granted by the US Patent Office to Henry Stafford Hatfield in 1924. The novel methods of sample preparation and designs of electrode geometry covered by the patent's disclosures and claims describe the basis for most present‐day
Ronald Pethig
wiley   +1 more source

ON GENERALIZED φ −RECURRENT KENMOTSU MANIFOLDS

open access: yesSüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009
: The purpose of this paper is to study generalized φ − recurrent Kenmotsu manifolds. Key words: Kenmotsu manifold, generalized recurrent, φ − recurrent manifold, Einstein manifold.
Aslı BAŞARI
doaj  

Einstein like -para Sasakian manifolds

open access: yesKuwait Journal of Science, 2013
Einstein like  -para Sasakian manifolds are introduced. For an  -para Sasakian manifold to be Einstein like, a necessary and sufficient condition in terms of its curvature tensor is obtained.
SADIK KELES   +3 more
doaj  

On Submanifolds of $N(k)$-Quasi Einstein Manifolds with a Type of Semi-Symmetric Metric Connection

open access: yesUniversal Journal of Mathematics and Applications, 2020
In this study, we consider the $ N(k)- $quasi Einstein manifolds with respect to a type of semi-symmetric metric connection. We suppose that the generator of $ N(k)- $quasi-Einstein manifolds is parallel with respect to semi-symmetric metric connection
İnan Ünal
doaj   +1 more source

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