Results 21 to 30 of about 19,688 (266)

Packing dimension profiles and Lévy processes [PDF]

open access: yesBulletin of the London Mathematical Society, 2012
We extend the concept of packing dimension profiles, due to Falconer and Howroyd (1997) and Howroyd (2001), and use our extension in order to determine the packing dimension of an arbitrary image of a general Levy process.
Khoshnevisan, Davar   +2 more
openaire   +2 more sources

Randomness extraction and asymptotic Hamming distance [PDF]

open access: yesLogical Methods in Computer Science, 2013
We obtain a non-implication result in the Medvedev degrees by studying sequences that are close to Martin-L\"of random in asymptotic Hamming distance. Our result is that the class of stochastically bi-immune sets is not Medvedev reducible to the class of
Cameron E. Freer, Bjoern Kjos-Hanssen
doaj   +1 more source

Patterns formed by chains of magnetic beads [PDF]

open access: yesEPJ Web of Conferences, 2021
Magnetic beads attract each other forming rather stable chains. We consider such chains formed by magnetic beads and push them into a Hele-Shaw cell either from the boundary or from the center.
Borges Danilo S.   +4 more
doaj   +1 more source

Generating dense packings of hard spheres by soft interaction design

open access: yesSciPost Physics, 2018
Packing spheres efficiently in large dimension $d$ is a particularly difficult optimization problem. In this paper we add an isotropic interaction potential to the pure hard-core repulsion, and show that one can tune it in order to maximize a lower ...
Thibaud Maimbourg, Mauro Sellitto, Guilhem Semerjian, Francesco Zamponi
doaj   +1 more source

METHODOLOGICAL BASIS OF SOLVING SPHERE PACKING PROBLEM: TRANSFORMATION OF KNAPSACK PROBLEM TO OPEN DIMENSION PROBLEM

open access: yesСучасні інформаційні системи, 2019
The subject matter of the paper is the problem of optimal packing of spheres of different dimension into a container of arbitrary geometric shape. The goal is to construct a mathematical model which associates different statements of the problem.
Georgiy Yaskov, Sergiy Shekhovtsov
doaj   +1 more source

Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder

open access: yesGeofluids, 2021
This paper explores the development laws of the fluidity, compressive strength, and autogenous shrinkage of ultrahigh performance cement (UHPC) mixed with limestone powder (LP) and highly active ground slag powder (SP).
Menghui Yang   +4 more
doaj   +1 more source

On the Densest Packing of Polycylinders in Any Dimension [PDF]

open access: yesDiscrete & Computational Geometry, 2016
Edited to reflect acknowledgements in the published ...
openaire   +4 more sources

Some typical properties of dimensions of sets and measures

open access: yesAbstract and Applied Analysis, 2005
This paper contains a review of recent results concerning typical properties of dimensions of sets and dimensions of measures. In particular, we are interested in the Hausdorff dimension, box dimension, and packing dimension of sets and in the Hausdorff ...
Józef Myjak
doaj   +1 more source

On the Mass Fractal Character of Si-Based Structural Networks in Amorphous Polymer Derived Ceramics

open access: yesNanomaterials, 2015
The intermediate-range packing of SiNxC4−x (0 ≤ x ≤ 4) tetrahedra in polysilycarbodiimide and polysilazane-derived amorphous SiCN ceramics is investigated using 29Si spin-lattice relaxation nuclear magnetic resonance (SLR NMR) spectroscopy.
Sabyasachi Sen, Scarlett Widgeon
doaj   +1 more source

Study on some Properties of Tomato Fruits for Natural Sun Drying [PDF]

open access: yesJournal of Soil Sciences and Agricultural Engineering, 2021
The present study aimed to determine some physiochemical and mechanical properties of tomato fruits (commercial variety Jasmin 775), and regression models to estimate volume and mass based on diameters and projected area, which is considered as a ...
Wael El Magd, A. E. Elwakeel
doaj   +1 more source

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