Electroconvective instability in a fluid layer

Electroconvective instabilities in fluid laye

Electrohydrodynamic charge relaxation and interfacial perpendicular field instability

Electrohydrodynamic charge relaxation and interfacial perpendicular-field instabilit

An electrohydrodynamically induced spatially period cellular Stokes-flow

Spatially periodic, time invariant electric field used to create spatially periodic cellular flow by action of electric shear stress in region of fluid-fluid interfac

Uncovering the Secrets of Statistics as Evidence in Business Valuations

Trials over the value of a business involve data, in large amounts, which must be presented in an understandable and impactful way. Statistics, when used properly, allow us to detect patterns or test theories we could not comprehend from a sea of numbers. But these shortcuts can be misused to create the appearance of accuracy, either through the expert’s failure to understand statistics or desire to deceive. This article explains, in simple terms, how to avoid these traps and spot a good statistic from a bad one

The experimental use of polytetrafluorethylene as an implant material

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The influence of alkaline phosphatase, calcium glycerophosphate and alginate on the repair of bone

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Magnetic hopfions in solids

Hopfions are an intriguing class of string-like solitons, named according to a classical topological concept classifying three-dimensional direction fields. The search of hopfions in real physical systems is going on for nearly half a century, starting with the seminal work of Faddeev. But so far realizations in solids are missing. Here, we present a theory that identifies magnetic materials featuring hopfions as stable states without the assistance of confinement or external fields. Our results are based on an advanced micromagnetic energy functional derived from a spin-lattice Hamiltonian. Hopfions appear as emergent particles of the classical Heisenberg model. Magnetic hopfions represent three-dimensional particle-like objects of nanometre-size dimensions opening the gate to a new generation of spintronic devices in the framework of a truly three-dimensional architecture. Our approach goes beyond the conventional phenomenological models. We derive material-realistic parameters that serve as concrete guidance in the search of magnetic hopfions bridging computational physics with materials science