Results 1 to 10 of about 2,662,283 (378)

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

Spheres [PDF]

open access: yesInference: International Review of Science, 2017
From microspheres to macrospheres: Pieter Lemmens reviews German philosopher Peter Sloterdijk’s Foams: Plural Spherology, recently translated into English, the conclusion of his massive Spheres trilogy.
openaire   +2 more sources

Modeling the accumulation of As, Cd, Cu, Pb and Zn in grasses (Agrotis sp. and Poa sp.) and stinging nettle (Urtica dioica) on selected sites taking into account soil physico-chemical properties

open access: yesE3S Web of Conferences, 2014
The effect of soil properties on the accumulation of metals in two vegetation types was evaluated at 10 sites with a wide variation in soil physicochemical properties pH, organic carbon, clay percentage , total soil metal concentration and exchangeable ...
Boshoff M.C., Blust R., Bervoets L.
doaj   +1 more source

Densest-Packed Columnar Structures of Hard Spheres: An Investigation of the Structural Dependence of Electrical Conductivity

open access: yesFrontiers in Physics, 2021
Identical hard spheres in cylindrical confinement exhibit a rich variety of densest-packed columnar structures. Such structures, which generally vary with the corresponding cylinder-to-sphere diameter ratio D, serve as structural models for a variety of ...
Panpan Ma, Ho-Kei Chan
doaj   +1 more source

Soliton spheres [PDF]

open access: yesTransactions of the American Mathematical Society, 2011
Soliton spheres are immersed 2–spheres in the conformal 4–sphereS4=HP1S^4=\mathbb {HP}^1that allow rational, conformal parametrizationsf:CP1→HP1f\colon \mathbb {CP}^1\rightarrow \mathbb {HP}^1obtained via twistor projection and dualization from rational curves inCP2n+1\mathbb {CP}^{2n+1}.
G. Paul Peters, Christoph Bohle
openaire   +3 more sources

THE EXPERIENCE OF TREGALOZA BASED LUBRICANT USAGE FOR PATIENTS WHO UNDERWENT EXCIMER LASER SURGERY

open access: yesOftalʹmologiâ, 2016
Purpose: to evaluate the tregalose based eye drops effectiveness in patients who underwent PRK or TransPRK surgery. patients and methods: 50 patients with moderate myopia were examined before, 7 days and 1 month after PRK or TransPRK surgery made by ...
E. Eskina, V. A. Parshina, M. Stepanova
doaj   +1 more source

Van der Waals interaction between an atom with spherical plasma shell [PDF]

open access: yes, 2011
We consider the van der Waals energy of an atom near the infinitely thin sphere with finite conductivity which model the fullerene. We put the sphere into spherical cavity inside the infinite dielectric media, then calculate the energy of vacuum ...
Khusnutdinov, Nail R.
core   +2 more sources

The Numerical Solution of the External Dirichlet Generalized Harmonic Problem for a Sphere by the Method of Probabilistic Solution

open access: yesMathematics, 2023
In the present paper, an algorithm for the numerical solution of the external Dirichlet generalized harmonic problem for a sphere by the method of probabilistic solution (MPS) is given, where “generalized” indicates that a boundary function has a finite ...
Mamuli Zakradze   +5 more
doaj   +1 more source

The creeping motion of a spherical particle normal to a deformable interface [PDF]

open access: yes, 1986
Numerical results are presented for the approach of a rigid sphere normal to a deformable fluid-fluid interface in the velocity range for which inertial effects may be neglected.
Geller, A. S., Leal, L. G., Lee, S. H.
core   +1 more source

Home - About - Disclaimer - Privacy