Results 31 to 40 of about 2,758,483 (364)

The Podleś Spheres Converge to the Sphere

open access: yesCommunications in Mathematical Physics, 2022
34 ...
Konrad Aguilar, Jens Kaad, David Kyed
openaire   +3 more sources

G-computation, propensity score-based methods, and targeted maximum likelihood estimator for causal inference with different covariates sets: a comparative simulation study

open access: yesScientific Reports, 2020
Controlling for confounding bias is crucial in causal inference. Distinct methods are currently employed to mitigate the effects of confounding bias. Each requires the introduction of a set of covariates, which remains difficult to choose, especially ...
Arthur Chatton   +9 more
doaj   +1 more source

On the hard sphere model and sphere packings in high dimensions [PDF]

open access: yes, 2018
We prove a lower bound on the entropy of sphere packings of $\mathbb R^d$ of density $\Theta(d \cdot 2^{-d})$. The entropy measures how plentiful such packings are, and our result is significantly stronger than the trivial lower bound that can be ...
Jenssen, Matthew   +2 more
core   +2 more sources

Nonparametric Rotations for Sphere-Sphere Regression [PDF]

open access: yesJournal of the American Statistical Association, 2018
Regression of data represented as points on a hypersphere has traditionally been treated using parametric families of transformations that include the simple rigid rotation as an important, special case. On the other hand, nonparametric methods have generally focused on modeling a scalar response through a spherical predictor by representing the ...
Di Marzio, M, Panzera, A, Taylor, CC
openaire   +5 more sources

Clinical effectiveness of nutrof total supplement for Dry age-related macular Degeneration

open access: yesРоссийский офтальмологический журнал, 2018
The paper’s purpose is to assess visual functions in patients with dry age-related macular degeneration (AMD) who receive antioxidant Nutrof Total supplement. Three groups of patients over 50 were examined.
E. N. Eskina   +2 more
doaj   +1 more source

Affine sphere relativity [PDF]

open access: yes, 2016
We investigate spacetimes whose light cones could be anisotropic. We prove the equivalence of the structures: (a) Lorentz-Finsler manifold for which the mean Cartan torsion vanishes, (b) Lorentz-Finsler manifold for which the indicatrix (observer space ...
Minguzzi, E.
core   +2 more sources

Sticky surface: sphere–sphere adhesion dynamics

open access: yesJournal of Biological Dynamics, 2014
We present a multi-scale model to study the attachment of spherical particles with a rigid core, coated with binding ligands and in equilibrium with the surrounding, quiescent fluid medium. This class of fluid-immersed adhesion is widespread in many natural and engineering settings.
Sircar, S., Younger, J., Bortz, D.
openaire   +4 more sources

Micro-Sphere PDMS for Enhancing Light Extraction in Organic Light-Emitting Devices

open access: yesNanomaterials, 2022
We present a micro-sphere PDMS film to improve the external quantum efficiency (EQE) in OLEDs. The micro-sphere PDMS film was fabricated with the breath figure (BF) and replica molding process.
Eun-Jeong Bae   +5 more
doaj   +1 more source

Exciting hard spheres [PDF]

open access: yesPhysical Review E, 2008
We investigate the collision cascade that is generated by a single moving incident particle on a static hard-sphere gas. We argue that the number of moving particles at time t grows as t^{xi} and the number collisions up to time t grows as t^{eta}, with xi=2d/(d+2) and eta=2(d+1)/(d+2) and d the spatial dimension.
Antal, T., Krapivsky, P. L., Redner, S.
openaire   +3 more sources

DETERMINATION OF EARTHQUAKE FOCUS COORDINATES USING THE CASSINI OVAL METHOD WITH SECOND- AND FOURTH-ORDER HYPERBOLA FIGURES

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2020
Objectives. To study the dependencies obtained when determining the coordinates of an earthquake hypocentre using the figures of fourth and second orders.Method.
B. I. Shakhtarin   +2 more
doaj   +1 more source

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