Results 101 to 110 of about 74,207 (261)

Capillary‐Based Physicochemical Characterization of Lipid Nanoparticles

ELECTROPHORESIS, EarlyView.
ABSTRACT Lipid nanoparticles (LNPs) are widely used for the delivery of nucleic acid (NAs), most notably in gene therapy and messenger ribonucleic acid (mRNA)‐based vaccines. Understanding their physicochemical properties is essential, yet current analytical approaches often fall short in capturing their complexity.
Evrim Ümit Kuzucu, Valentin Schittny, Jörg Huwyler, Maria Anna Schwarz   +3 more
wiley   +1 more source

Sphere Theorems for σ_k-Einstein Manifolds

Axioms
A problem that geometers have always been concerned with is when a closed manifold is isometric to a round sphere. A classical result shows that a closed locally conformally flat Einstein manifold is always isometric to a quotient of a round sphere.
Jingyang Zhong, Xinran Mu
doaj   +1 more source

Einstein metrics on a product manifold

Proceedings of the Japan Academy, Series A, Mathematical Sciences, 1994
The study of the integral of the scalar curvature \(I(g)\) as a function on the set of all Riemannian metrics \(g\) of the same total volume on a compact manifold is well known and the critical points are the Einstein manifolds, [see \textit{Y. Muto}, J. Differ. Geom. 9, 521-530 (1974; Zbl 0288.53037) or \textit{A. L.
openaire   +2 more sources

Holonomy of Einstein Lorentzian manifolds [PDF]

Classical 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

Dynamics of Vector Soliton Singlets and Pairs in Self‐Mode‐Locked Tm‐Doped Fibre Lasers

Laser &Photonics Reviews, EarlyView.
This study characterises soliton build‐up dynamics in a self‐mode‐locked Tm‐doped fibre laser, where both cavity birefringence and distributed saturable absorber play significant roles in the intracavity pulse shaping. The recorded single‐shot spectra using the dispersive Fourier transform technique reveal intensity‐dependent temporal splitting of ...
Dennis C. Kirsch, Anastasia Bednyakova, Maria Chernysheva   +2 more
wiley   +1 more source

On Riemannian warped-twisted product submersions

AIMS Mathematics
In this paper, we introduce the concepts of Riemannian warped-twisted product submersions and examine their fundamental properties, including total geodesicity, total umbilicity and minimality.
Richa Agarwal, Fatemah Mofarreh, Sarvesh Kumar Yadav, Shahid Ali, Abdul Haseeb   +4 more
doaj   +1 more source

Topological Quasiparticles of Light: From Spin‐Orbit Coupling to Photonic Skyrmions

Laser &Photonics Reviews, EarlyView.
This review summarizes recent advances in photonic skyrmions, emphasizing the central role of spin–orbit coupling in their formation. The review discusses how spin–orbit interactions generate skyrmionic textures, examines modulation strategies for their dynamic control, and provides an overview of emerging directions and opportunities where these ...
Xinrui Lei, Qiwen Zhan
wiley   +1 more source

Characterizing ϕRic-Vector Fields and Quasi-Einstein Manifolds on Multiply Warped Product Manifolds

International Journal of Mathematics and Mathematical Sciences
We characterize multiply warped product manifolds with ϕRic-vector fields. We give the necessary and sufficient conditions for the lift of a vector field on a factor manifold to be the ϕRic-vector field.
Moctar Traore, Ameth Ndiaye, Mansour Sane   +2 more
doaj   +1 more source

Glass Microsphere‐Filled Microlayer Films via Layer Multiplying Co‐Extrusion: Morphology and Process Stability

Macromolecular Materials and Engineering, EarlyView.
This study explores processing conditions during the co‐extrusion of highly particle‐filled layered polymeric composites. With an appropriate rheology match, layers with thicknesses approaching the particle sizes are possible. However, instability‐driven layer break‐up occurs when a critical interfacial shear stress is exceeded.
Dayne A. Plemmons, Erik Steinmetz, João M. Maia, Joseph L. Lenhart, Randy A. Mrozek   +4 more
wiley   +1 more source

There Are No Conformal Einstein Rescalings of Pseudo-Riemannian Einstein Spaces with n Complete Light-Like Geodesics

Mathematics, 2019
In the present paper, we study conformal mappings between a connected n-dimension pseudo-Riemannian Einstein manifolds. Let g be a pseudo-Riemannian Einstein metric of indefinite signature on a connected n-dimensional manifold M.
Josef Mikeš, Irena Hinterleitner, Nadezda Guseva   +2 more
doaj   +1 more source