Results 81 to 90 of about 39,041 (325)

A New Type Warped Product Metric in Contact Geometry [PDF]

open access: green, 2021
Ahmet MOLLAOĞULLARI, Çetin Camcı
openalex   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

open access: yesAdvanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades   +7 more
wiley   +1 more source

The First Eigenvalue Estimates of Warped Product Pseudo-Slant Submanifolds

open access: yesMathematics, 2019
The aim of this paper is to construct a sharp general inequality for warped product pseudo-slant submanifold of the type M = M ⊥ × f M θ , in a nearly cosymplectic manifold, in terms of the warping function and the symmetric ...
Rifaqat Ali   +3 more
doaj   +1 more source

GEOMETRIC FLOWS ON WARPED PRODUCT MANIFOLD [PDF]

open access: yesTaiwanese Journal of Mathematics, 2013
We derive one unified formula for Ricci curvature tensor on arbitrary warped product manifold by introducing a new notation for the lift vector and the Levi-Civita connection.This formula is helpful to further consider Ricci flow (RF) and hyperbolic geometric flow (HGF) and evolution equations on warped product manifold. We characterize the behavior of
openaire   +3 more sources

Sharp Growth Estimates for Warping Functions in Multiply Warped Product Manifolds [PDF]

open access: yesJournal of Geometry and Symmetry in Physics, 2019
By applying an average method in PDE, we obtain a dichotomy between "constancy" and "infinity" of the warping functions on complete noncompact Riemannian manifolds for an appropriate isometric immersion of a multiply warped product manifold $N_1\times_{f_2} N_2 \times \cdots \times _{f_k} N_k\, $ into a Riemannian manifold.
Chen, Bang-Yen, Wei, Shihshu Walter
openaire   +4 more sources

Light‐Controlled Exposure of Cancer Cells to Reactive Oxygen Species Using Organic Semiconductor Thin Films

open access: yesAdvanced Materials Interfaces, EarlyView.
Spin‐coated films of the conjugated polymer F8T2 (poly (9,9‐dioctylfluorene‐alt‐bithiophene)) generate superoxide at the film‐medium interface, enabling precise delivery of reactive oxygen species (ROS) as visible‐light “ROS patches.” Coated surfaces drive rapid, localised cytotoxicity in MCF7 cancer monolayers under white light, providing a reagent ...
Joe Kaye   +8 more
wiley   +1 more source

A Pinching Theorem for Compact Minimal Submanifolds in Warped Products I×fSm(c)

open access: yesMathematics, 2020
Let Sm(c) be a Euclidean sphere of curvature c>0 and R be a Euclidean line. We prove a pinching theorem for compact minimal submanifolds immersed in Riemannian warped products of the type I×fSm(c), where f:I→R+ is a smooth positive function on an open ...
Xin Zhan, Zhonghua Hou
doaj   +1 more source

Symmetries of geometric flows [PDF]

open access: yes, 2010
By applying the theory of group-invariant solutions we investigate the symmetries of Ricci flow and hyperbolic geometric flow both on Riemann surfaces.
Chao, Xu
core  

On the stability of minimal cones in warped products

open access: yes, 2014
In a seminal paper published in $1968$, J. Simons proved that, for $n\leq 5$, the Euclidean (minimal) cone $CM$, built on a closed, oriented, minimal and non totally geodesic hypersurface $M^n$ of $\mathbb S^{n+1}$ is unstable.
Bezerra, K. S., Caminha, A., Lima, B. P.
core   +1 more source

Fully Printed Organic Electrochemical Transistors With Low‐Resistance Electrodes on Planarized 3D‐Printed Substrates

open access: yesAdvanced Materials Technologies, EarlyView.
This paper explores integrating organic electrochemical transistors (OECTs) with planarized 3D‐printed substrates, utilizing ironing to enhance surface suitability for printing, dispense printing for thick, low‐resistance silver electrodes, and inkjet printing for semiconductor deposition.
Mohamad Kannan Idris   +3 more
wiley   +1 more source

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