Results 41 to 50 of about 1,253 (179)
Polymer Composites, EarlyView.Effect of nanosilica aggregates/agglomerates on oxygen and water vapor diffusivity of PBF/SiO2 nanocomposites. ABSTRACT The nanofillers inclusions in poly(butylene 2,5‐furandicarboxylate) (PBF)/SiO2 nanocomposites were found to consist of aggregates and agglomerates of nanosilica particles.
Giovanna Molinari +9 more
wiley +1 more source
Indefinite Almost Paracontact Metric Manifolds
International Journal of Mathematics and Mathematical Sciences, 2010 We introduce the concept of (ε)-almost paracontact manifolds, and in particular, of (ε)-para-Sasakian manifolds. Several examples are presented. Some typical identities for curvature tensor and Ricci tensor of (ε)-para Sasakian manifolds are obtained. We
Mukut Mani Tripathi +3 more
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Sustainable Development, EarlyView.ABSTRACT User personas are important tools for user understanding in human‐computer interaction (HCI), and understanding how personas contribute to environmental sustainability across research and practice contexts is increasingly important. Our systematic review of 36 articles on persona research in environmental sustainability reveals four key ...
Rajat Patil +4 more
wiley +1 more source
η-Ricci solitons in Kenmotsu manifolds
Annals of the West University of Timisoara: Mathematics and Computer Science, 2019 The object of the present paper is to study generalized weakly symmetric and generalized weakly Ricci symmetric Kenmotsu manifolds whose metric tensor is η-Ricci soliton. The paper also aims to bring out curvature conditions for which η-Ricci solitons in
Baishya Kanak Kanti +1 more
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The Big Picture: Religion and Global Comparative History
Journal of Religious History, EarlyView.This article considers what a ‘big picture’ approach to global religious history might look like, and in particular the implications of deploying the comparative method across much larger stretches of time and space than historians normally attend to. It will begin by reflecting on the epistemological moods that have hindered this project to date, the ...
Alan Strathern
wiley +1 more source
Some inequalities among curvature invariants
European Physical Journal C: Particles and FieldsWe prove an infinite sequence of inequalities among scalar polynomial invariants of symmetric rank-2 tensors of Segre types A1, A3, and B. In particular, these inequalities apply to the Ricci tensor and the energy-momentum tensor. If at least one of them
Sebastian J. Szybka +2 more
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Spektra: Jurnal Fisika dan Aplikasinya, 2017 Abstrak Studi yang berkaitan dengan braneworld dimensi lima dengan brane tunggal yang terletak di telah diakukan, model Randall-Sundrum dan modifikasi Randall-Sundrum. Aspek yang ditinjau adalah skalar Ricci, persamaan Einstein, tensor energi-momentum,
Dewi Wulandari
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Estimating the trace-free Ricci tensor in Ricci flow [PDF]
Proceedings of the American Mathematical Society, 2009 An important and natural question in the analysis of Ricci flow behavior in all dimensions n ≥
openaire +3 more sources
Isometric immersions into three‐dimensional unimodular metric Lie groups
Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.Abstract We study isometric immersions of surfaces into simply connected three‐dimensional unimodular Lie groups endowed with either Riemannian or Lorentzian left‐invariant metrics, assuming that Milnor's operator is diagonalizable in the Lorentzian case.
Ildefonso Castro +2 more
wiley +1 more source
Ricci Solitons in (ε,δ)-Trans-Sasakian Manifolds
International Journal of Analysis and Applications, 2017 We study Ricci solitons in (ε,δ)-trans-Sasakian manifolds. It is shown that a symmetric parallel second order covariant tensor in a (ε,δ)-trans-Sasakian manifold is a constant multiple of the metric tensor.
C.S. Bagewadi, Gurupadavva Ingalahalli
doaj +2 more sources