Results 11 to 20 of about 190,445 (136)

Experimental validation of the mechanical coupling response for hygro-thermally curvature-stable laminated composite materials [PDF]

open access: yes, 2011
Stacking sequence configurations for hygro-thermally curvature-stable (HTCS) laminates have recently been identified in 9 classes of coupled laminate with standard ply angle orientations +45, "1245, 0 and ...
Shamsudin, M.H.   +3 more
core   +9 more sources

A New Class of Almost Ricci Solitons and Their Physical Interpretation. [PDF]

open access: yesInt Sch Res Notices, 2016
We establish a link between a connection symmetry, called conformal collineation, and almost Ricci soliton (in particular Ricci soliton) in reducible Ricci symmetric semi‐Riemannian manifolds. As a physical application, by investigating the kinematic and dynamic properties of almost Ricci soliton manifolds, we present a physical model of imperfect ...
Duggal KL.
europepmc   +2 more sources

Differential phase tracking applied to Bragg gratings in multi-core fibre for high accuracy curvature measurement [PDF]

open access: yes, 2006
High resolution quasi-static and dynamic curvature measurements are made by differential interferometric phase measurement of fibre Bragg gratings in separate cores of a multi-core fibre.
Flockhart, G M H   +2 more
core   +4 more sources

The threat of an indigenous medicinal plant encroacher: Artemisia afra in Klipriviersberg Nature Reserve, Johannesburg, South Africa

open access: yesAfrican Journal of Ecology, Volume 60, Issue 4, Page 1133-1142, December 2022., 2022
Abstract Artemisia afra was identified as an encroaching shrub in the Klipriviersberg Nature Reserve (KNR). Ecological factors that influence the encroachment of A. afra and its population structure were unknown, making it difficult to monitor and control the spread of the plant.
Kgalalelo T. A. Setshedi   +2 more
wiley   +1 more source

ρ‐Einstein Solitons on Warped Product Manifolds and Applications

open access: yesJournal of Mathematics, Volume 2022, Issue 1, 2022., 2022
The purpose of this research is to investigate how a ρ‐Einstein soliton structure on a warped product manifold affects its base and fiber factor manifolds. Firstly, the pertinent properties of ρ‐Einstein solitons are provided. Secondly, numerous necessary and sufficient conditions of a ρ‐Einstein soliton warped product manifold to make its factor ρ ...
Nasser Bin Turki   +5 more
wiley   +1 more source

Conformally Flat Pseudoprojective Symmetric Spacetimes in fR,G Gravity

open access: yesAdvances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022
Sufficient conditions on a pseudoprojective symmetric spacetime (PPS)n whose Ricci tensor is of Codazzi type to be either a perfect fluid or Einstein spacetime are given. Also, it is shown that a (PPS)n is Einstein if its Ricci tensor is cyclic parallel. Next, we illustrate that a conformally flat (PPS)n spacetime is of constant curvature.
Uday Chand De   +4 more
wiley   +1 more source

Design Optimization of an Integrated E‐Type Multilink Suspension Wheel‐Side Drive System and Improvement of Vehicle Ride Comfort

open access: yesShock and Vibration, Volume 2021, Issue 1, 2021., 2021
Distributed‐drive electric vehicles constitute an important research direction for the future development of electric vehicles. In this regard, the integrated suspension wheel‐side drive system has considerable development potential because it can address the lack of driving smoothness and the grounding deterioration caused by the excessive unsprung ...
Wen Lu   +3 more
wiley   +1 more source

A New Class of Contact Pseudo Framed Manifolds with Applications

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2021, Issue 1, 2021., 2021
In this paper, we introduce a new class of contact pseudo framed (CPF)‐manifolds (M, g, f, λ, ξ) by a real tensor field f of type (1,1), a real function λ such that f3 = λ2f where ξ is its characteristic vector field. We prove in our main Theorem 2 that M admits a closed 2‐form Ω if λ is constant.
K. L. Duggal, Luca Vitagliano
wiley   +1 more source

Certain Class of Almost α‐Cosymplectic Manifolds

open access: yesJournal of Mathematics, Volume 2021, Issue 1, 2021., 2021
This paper concerned with almost α‐cosymplectic manifolds satisfying conformally flat condition. Firstly, we investigate Kaehler integral submanifolds of almost α‐cosymplectic manifolds. Next, we study conformally flat almost α‐cosymplectic manifolds of dim ≥ 5 whose integral submanifolds are Kaehler.
Sermin Öztürk   +2 more
wiley   +1 more source

Mean curvature flow with triple junctions in higher space dimensions [PDF]

open access: yes, 2012
We consider mean curvature ow of n-dimensional surface clusters. At (
Garcke, Harald   +2 more
core   +1 more source

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