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Curvature operators and scalar curvature invariants [PDF]

Classical and Quantum Gravity, 2010
We continue the study of the question of when a pseudo-Riemannain manifold can be locally characterised by its scalar polynomial curvature invariants (constructed from the Riemann tensor and its covariant derivatives).
Alan Coley, Chaichi M, Coley A, Coley A, Coley A, Coley A, Coley A, Coley A, Coley A, Coley A, Coley A, Coley A, Petrov A Z, Pravda V, Procesi C, Sigbjørn Hervik   +15 more
core   +6 more sources

Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure

Advanced Science, 2022
When a thermoelectric (TE) material is deposited with a secondary TE material, the total Seebeck coefficient of the stacked layer is generally represented by a parallel conductor model.
Won‐Yong Lee, Min‐Sung Kang, Jae Won Choi, Si‐Hoo Kim, No‐Won Park, Gil‐Sung Kim, Yun‐Ho Kim, Eiji Saitoh, Young‐Gui Yoon, Sang‐Kwon Lee   +9 more
doaj   +1 more source

Alternatingly Stacked Low‐ and High‐Resistance PtSe2/PtSe2 Homostructures Boost Thermoelectric Power Factors

Advanced Electronic Materials, 2023
2D transition‐metal dichalcogenide (TMDC) materials are promising candidates with excellent thermoelectric (TE) properties owing to their low dimensionality in electronic and phonon transport. However, the considerable coupling of the Seebeck coefficient
Won‐Yong Lee, Min‐Sung Kang, Jae Won Choi, Si‐Hoo Kim, No‐Won Park, Gil‐Sung Kim, Yun‐Ho Kim, Sang‐Kwon Lee   +7 more
doaj   +1 more source

Gaussian curvature dilutes the nuclear lamina, favoring nuclear rupture, especially at high strain rate

Nucleus, 2022
Nuclear rupture has long been associated with deficits or defects in lamins, with recent results also indicating a role for actomyosin stress, but key physical determinants of rupture remain unclear.
Charlotte R. Pfeifer, Michael P. Tobin, Sangkyun Cho, Manasvita Vashisth, Lawrence J. Dooling, Lizeth Lopez Vazquez, Emma G. Ricci-De Lucca, Keiann T. Simon, Dennis E. Discher   +8 more
doaj   +1 more source

Research on Deformation Reconstruction Based on Structural Curvature of CFRP Propeller With Fiber Bragg Grating Sensor Network

Photonic Sensors, 2022
The deformation and reconstruction of the composite propeller under the static load in the laboratory is studied so as to provide the basic research for the deformation and reconstruction of the underwater deformed propeller. The fiber Bragg grating (FBG)
Guoping Ding, Fu Wang, Xiaoling Gao, Siyuan Jiang   +3 more
doaj   +1 more source

Magnonic band spectrum of spin waves in an elliptical helix [PDF]

Royal Society Open Science, 2018
We show that the spin-wave spectrum in an elliptical helix has a band character. The size of the first band gap calculated using the perturbation theory is shown to scale as square root of the eccentricity.
A. V. Golovchan, V. V. Kruglyak, V. S. Tkachenko, A. N. Kuchko   +3 more
doaj   +1 more source

Convergence for global curve diffusion flows

Mathematics in Engineering, 2022
In this note we establish exponentially fast smooth convergence for global curve diffusion flows, and discuss open problems relating embeddedness to global existence (Giga's conjecture) and the shape of Type I singularities (Chou's conjecture).
Glen Wheeler
doaj   +1 more source

Influence of Surface Curvature on Coanda Effect for Vertical Jet Impacting Horizontal Cylinder [PDF]

Journal of Applied Fluid Mechanics, 2023
The Coanda effect is a tendency of flowing fluid to follow the solid surface rather than to separate under the inertial effect. This paper presents the effects of surface curvature on the Coanda angle and jet deflection for a vertical jet impacting a ...
M. Nausin, M. Seerwani, M. M. Alam
doaj   +1 more source

Hamilton type gradient estimates for a general type of nonlinear parabolic equations on Riemannian manifolds

AIMS Mathematics, 2021
$ (\Delta_{V}-q(x, t)-\partial_{t})u(x, t) = A(u(x, t)) $ on complete Riemannian manifold (with fixed metric). When $ V = 0 $ and the metric evolves under the geometric flow, we also derive some Hamilton type gradient estimates.
Fanqi Zeng
doaj   +1 more source

Tape surface characterization and classification in automated tape placement processability: Modeling and numerical analysis

AIMS Materials Science, 2018
Many composite forming processes are based on the consolidation of preimpregnated preforms of different types, e.g., sheets, tapes, .... Composite plies are put in contact using different technologies and consolidation is performed by supplying heat and ...
Clara Argerich, Ruben Ibáñez, Angel León, Anaïs Barasinski, Emmanuelle Abisset-Chavanne, Francisco Chinesta   +5 more
doaj   +1 more source