Results 81 to 90 of about 66,495 (292)

Ellipsoid

open access: yes, 2016
surfaces, ellipsoidAn ellipsoid is a quadratic surface given by (x^2)/(a^2)+(y^2)/(b^2)+(z^2)/(c^2)=1Componente Curricular::Educação Superior::Ciências Exatas e da Terra ...
Bryant, Jeff
core   +2 more sources

Geometry of the rolling ellipsoid [PDF]

open access: yes, 2016
summary:We study rolling maps of the Euclidean ellipsoid, rolling upon its affine tangent space at a point. Driven by the geometry of rolling maps, we find a simple formula for the angular velocity of the rolling ellipsoid along any piecewise smooth ...
Silva Leite, Fátima   +1 more
core   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser   +3 more
wiley   +1 more source

Location adjustment for the minimum volume ellipsoid estimator. [PDF]

open access: yes
Estimating multivariate location and scatter with both affine equivariance and positive breakdown has always been difficult. A well-known estimator which satisfies both properties is the Minimum Volume Ellipsoid Estimator (MVE).
Croux, Christophe   +2 more
core  

Embedded Ferroelectric Nanoclusters Can Drive Polarization Reversal in a Non‐Ferroelectric Polar Film via the Proximity Effect

open access: yesAdvanced Functional Materials, EarlyView.
Ferroelectric nanoclusters create local internal fields in a normally non‐switchable polar film because of polarization mismatch at their interfaces. That field opposes polarization in the regions with larger polarization and reinforces polarization in the regions with smaller polarization.
Anna N. Morozovska   +5 more
wiley   +1 more source

Two‐Photon Grayscale Lithography (2GL) of High Mechanical and Optical Quality 3D Silica Glass Microstructures

open access: yesAdvanced Functional Materials, EarlyView.
Two‐photon grayscale lithography (2GL) enables high‐speed and precise 3D printing of thermolyzed silica glass microstructures with optical‐grade surface quality, high quality factors, and mechanical strength utilizing a custom‐made pre‐glass resist based on polyhedral oligomeric silsesquioxane (POSS) modified with a high‐sensitivity Norrish type II ...
Jonathan L. G. Schneider   +4 more
wiley   +1 more source

Why Ellipsoid Constraints, Ellipsoid Clusters, and Riemannian Space-Time: Dvoretzky\u27s Theorem Revisited [PDF]

open access: yes, 2010
In many practical applications, we encounter ellipsoid constraints, ellipsoid-shaped clusters, etc. A usual justification for this ellipsoid shape comes from the fact that many real-life quantities are normally distributed, and for a multi-variate normal
Villaverde, Karen   +2 more
core   +1 more source

"RESISTANCE MOMENT AT ROTATION OF AN ELLIPSOID IN VISCOUS FLUID "

open access: yesEurasian Physical Technical Journal, 2018
The slow rotation of a solid body in a liquid, which is affected by the resistance force, is considered on the example of an ellipsoid. This force is created by both friction forces and pressure forces resulting from the effect of the attached mass.
I.V. Dudin   +2 more
doaj  

3D Bioprinted Glioblastoma Multiforme Models: How the Extracellular Matrix Glycosignature Influences Drug Response

open access: yesAdvanced Functional Materials, EarlyView.
Aberrant glycosylation in the glioblastoma tumor microenvironment drives therapeutic resistance. Here, a 3D bioprinted model was engineered by incorporating α‐NeuNAc‐(2→3)‐β‐D‐Gal‐ and chondroitin sulfate. Combined multiplex immunofluorescence and synchrotron‐based nanoCT analysis revealed that glycan‐matrix interactions dictate specific drug‐escape ...
Francesca Cadamuro   +25 more
wiley   +1 more source

"Application of a complete multi-network method for solving the problem of flows around sphere "

open access: yesEurasian Physical Technical Journal, 2019
Using the example of a numerical solution of the classical problem of a viscous flow past a sphere, the efficiency of using the multigrid method was compared with direct calculations. Various difference schemes are considered. It's shown that to go from
R.K. Narimanov, G.N. Narimanova
doaj   +1 more source

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