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Št. zadetkov: 8
Construction of one-way hash functions with increased key space using adaptive chaotic maps
Aleksandra Tutueva, Artur I. Karimov, Lazaros Moysis, Christos Volos, Denis Butusov
Izvirni znanstveni članek
Oznake: chaos;one-way functions;adaptive map;hash function;encryption;cryptography;nonlinear system;
Chaotic hash functions are a prospective branch of modern cryptography. Being compared with traditional hashing algorithms, an approach based on deterministic chaos allows achieving diffusion and confusion with less computational costs. Most of the recently proposed chaotic hash functions use piecew ...
Leto: 2020 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Improving pseudo-random number generators in a floating-point implementation
Aleksandra Tutueva, Artur I. Karimov, Petr S. Fedoseev, Lazaros Moysis, Christos Volos, Denis Butusov
Objavljeni znanstveni prispevek na konferenci
Oznake: chaos;nonlinear system;pseudo-random bit generator;
Chaotic systems are prospective for secure data transfer and processing. Over the past decades, many chaos-based encryption schemes have been proposed. It was shown that such cryptosystems are faster than traditional approaches. In this study, we consider a technique for improving pseudo-random sequ ...
Leto: 2020 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Improving chaos-based pseudo-random generators in finite-precision arithmetic
Aleksandra Tutueva, Timur I. Karimov, Lazaros Moysis, Erivelton G. Nepomuceno, Christos Volos, Denis Butusov
Izvirni znanstveni članek
Oznake: chaos;nonlinear system;pseudo-random bit generator;PRBG;floating-point data type;IEEE754-2008;
One of the widely-used ways in chaos-based cryptography to generate pseudo-random sequences is to use the least significant bits or digits of finite-precision numbers defined by the chaotic orbits. In this study, we show that the results obtained using such an approach are very prone to rounding err ...
Leto: 2021 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
The process of establishing companies and business club in Azerbaijan
Anar Karimov
Video in druga učna gradiva
Oznake: business
Leto: 2014 Vir: videolectures.net
On nerves of fine coverings of acyclic spaces
Umed H. Karimov, Dušan Repovš
Izvirni znanstveni članek
Oznake: planar acyclic space;cellular compactum;absolute neighborhood retract;nerve;fine covering;embedding into Euclidean space;Čech homology;
The main results of this paper are: (1) If a space ▫$X$▫ can be embedded as a cellular subspace of ▫$\mathbb{R}^n$▫ then ▫$X$▫ admits arbitrary fine open coverings whose nerves are homeomorphic to the ▫$n$▫-dimensional cube ▫$D^n$▫. (2) Every ▫$n$▫-dimensional cell-like compactum can be embedded int ...
Leto: 2015 Vir: Fakulteta za matematiko in fiziko (UL FMF)
On the Alexandroff-Borsuk problem
Matija Cencelj, Umed H. Karimov, Dušan Repovš
Izvirni znanstveni članek
Oznake: ANR;končni polieder;homotopska ekvivalenca;▫$\varepsilon$▫-preslikava;celularna preslikava;skoraj gladka mnogoterost;$|E_8|$-mnogoterost;Kirby-Siebenmannov razred;Galewski-Sternova ovira;netriangulabilna mnogoterost;problem Aleksandrova in Borsuka o mnogoterostih;finite polyhedron;homotopy equivalence;▫$\varepsilon$▫-map;cellular map;almost-smooth manifold;▫$|E_8|$▫-manifold;Kirby-Siebenmann class;Galewski-Stern obstruction;non-triangulable manifold;Alexandroff-Borsuk Manifold Problem;
Obravnavamo klasični problem Aleksandrova in Borsuka v kategoriji netriangulabilnih mnogoterosti: ali za dano ▫$n$▫-dimenzionalno kompaktno netriangulabilno mnogoterost ▫$M^n$▫ in dani ▫$\varepsilon > 0$▫ obstaja ▫$\varepsilon$▫-preslikava ▫$M^n$▫ na ▫$n$▫-dimenzionalni končni polieder, ki inducira ...
Leto: 2017 Vir: Pedagoška fakulteta (UL PEF)
ǂA ǂnew class of homology and cohomology 3-manifolds
Dennis Garity, Umed H. Karimov, Dušan Repovš, Fulvia Spaggiari
Izvirni znanstveni članek
Oznake: cohomology 3-manifold;cohomological dimension;Borel-Moore homology;Čech cohomology;Milnor-Harlap exact sequence;lens space;ANR;
We show that for any set of primes ▫$\mathcal{P}$▫ there exists a space ▫$M_\mathcal{P}$▫ which is a homology and cohomology 3-manifold with coefficients in ▫$\mathbb{Z}_p$▫ for ▫$p \in \mathcal{P}$▫ and is not a homology or cohomology 3-manifold with coefficients in ▫$\mathbb{Z}_q$▫ for ▫$q \notin ...
Leto: 2016 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Economic costs of biological invasions in terrestrial ecosystems in Russia
Natalia I. Kirichenko, Phillip Joschka Haubrock, Ross N. Cuthbert, Evgeny N. Akulov, Elena Karimova, Yury Shneyder, Chunlong Liu, Elena Angulo, Christophe Diagne, Franck Courchamp
Izvirni znanstveni članek
Oznake: neposredne izgube;posredne izgube;žuželke;InvaCost;invazivne vrste;patogeni;Ruska federacija;plevel;direct and indirect losses;insects;invasive species;pathogens;Russian Federation;weeds;
Terrestrial ecosystems, owing to the presence of key socio-economic sectors such as agriculture and forestry, may be particularly economically affected by biological invasions. The present study uses a subset of the recently developed database of global economic costs of biological invasions (InvaCo ...
Leto: 2021 Vir: Repozitorij Univerze v Ljubljani (RUL)
Št. zadetkov: 8
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