Results 111 to 120 of about 4,654 (253)

Lieu des points exceptionnels et cône tangent multidirectionnel d'un courant positif fermé [PDF]

, 2000
Locus of exceptional points and the multidirectional tangent cone of a closed positive current.Let Ω be an open set in Cn, with n≥2 and let (Xk)k be a sequence of analytic sets of dimension p≤n−2 in Ω.
Blel, Mongi
core   +1 more source

Tangent cones of concatenated numerical semigroups

Communications in Algebra
We study the tangent cone at the origin and the Hilbert series for a family of numerical semigroups generated by concatenation of arithmetic sequences. We prove that all the concatenation classes have Cohen-Macaulay tangent cones except the symmetric class, however, the symmetric class does satisfy Rossi's conjecture.
Mehta, Ranjana, Saha, Joydip, Sengupta, Indranath   +2 more
openaire   +2 more sources

Electrospun conducting polymers: recent trends and the transition towards a sustainable future

Polymer International, EarlyView.
This review discusses the electrospinning of conducting polymers, detailing procedures, fibrous morphologies, improved properties, applications in electronics, and challenges, while outlining future directions for nanofibre‐based devices in various fields.
Xenofon Karagiorgis, Sofia Sandhu, Peter J. Skabara, Ravinder Dahiya   +3 more
wiley   +1 more source

Coupled observation‐operator approximations in outer‐loop coupling data assimilation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We present a methodology for coupled variational data assimilation that allows the effect of coupled observation operators whilst maintaining separate minimisations across model components. This allows us to constrain the atmosphere, ocean, and sea‐ice components of our coupled model directly from satellite radiances. We illustrate the system in action
P. A. Browne, P. de Rosnay, A. J. Geer, S. Quesada‐Ruiz, T. Scanlon, E. Villeneuve   +5 more
wiley   +1 more source

High‐Efficiency Generation of Vectorial Terahertz Beams via Surface‐Wave‐Excited Dielectric Metasurfaces

Small, EarlyView.
ABSTRACT Generating pre‐designed vectorial beams via on‐chip devices can yield many fascinating applications, but traditional diffraction‐based devices are bulky and inefficient. While plasmonic metasurfaces exhibit ultra‐compact sizes and deep‐subwavelength resolutions, their working efficiencies are limited by metallic losses.
Yu He, Yuanxi Liu, Yao Yao, Qingnan Cai, Dumeng Zhang, Xiangyu Jin, Shulin Sun, Zhuo Wang, Lei Zhou   +8 more
wiley   +1 more source

Punching shear of unbonded post‐tensioned steel fiber reinforced concrete slabs: The fiber contribution

Structural Concrete, EarlyView.
Abstract Steel fiber reinforced concrete (SFRC) enhances the flexural capacity of flat slabs and, due to its effectiveness in statically redundant bi‐dimensional elements, represents a viable alternative to conventional reinforcement. Although numerous studies have investigated the flexural behavior of SFRC slabs with and without bonded reinforcement ...
Chiara Gaddi, Matteo Colombo, Marco di Prisco   +2 more
wiley   +1 more source

Machine learning analysis of tangent hyperbolic nanofluid with radiation and Arrhenius activation energy over falling cone under gravity

Partial Differential Equations in Applied Mathematics
This study is a machine learning investigation of the advance level nanofluidic coolant through a cone in a two-dimensional transitory boundary layer. The model accounts for both radiation absorption and the Arrhenius activation energy.
Muhammad Zubair, Hamid Qureshi, Usman Khaliq, Taoufik Saidani, Waqar Azeem Khan   +4 more
doaj   +1 more source

Deformation and strength of grouted sleeve connectors in pre‐fabricated concrete structures: Mechanisms and analytical modeling

Structural Concrete, EarlyView.
Abstract Grouted sleeve connectors (GSCs) are widely used in precast/prefabricated concrete structures. To ensure force transfer, connectors are often overdesigned in length. This practice has an unintended consequence of reducing the plastic deformation capacity of the connection region and hence the displacement ductility of the precast structure as ...
Hongning Ye, Yong Lu
wiley   +1 more source

Computation of the tangent cone to the image of a mapping at a singular point [PDF]

The paper concerns the calculus of the tangent cone to the set F(N) at the point F(p) for sufficiently small neighborhoods N of the singular point p, which means F'(p)(X)subset Y.
Arutyunov A.V., Ursescu Corneliu
core  

Tangent star cones

Let \(X\) be an algebraic variety over a field \(k\). For \(x\in X\) a point on the variety, various notions of the cone to \(X\) at \(x\) have been considered, three of which have shown importance. The first two are defined, respectively, in terms of the linear forms (Zariski tangent space) and the initial forms (normal cone) of the equations ...
Simis, A., Ulrich, B., Vasconcelos, W.V.
openaire   +1 more source