Results 11 to 20 of about 33,865 (256)

Connectedness of number theoretical tilings [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
Let T=T(A,D) be a self-affine tile in \reals^n defined by an integral expanding matrix A and a digit set D. In connection with canonical number systems, we study connectedness of T when D corresponds to the set of consecutive integers \0,1,..., |det(A ...
Shigeki Akiyama, Nertila Gjini
doaj   +3 more sources

The automorphisms and error orbits of Reed – Solomon codes

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники, 2020
The purpose of this work with its results presented in the article was to develop and transfer to the class of Reed – Solomon codes (RS-codes) the basic provisions of the theory of syndrome norms (TNS), previously developed for the noise-resistant coding
S. I. Semyonov, V. A. Lipnitsky
doaj   +1 more source

A Simple Image Encryption Based on Binary Image Affine Transformation and Zigzag Process

open access: yesComplexity, 2022
In this paper, we propose a new and simple method for image encryption. It uses an external secret key of 128 bits long and an internal secret key. The novelties of the proposed encryption process are the methods used to extract an internal key to apply ...
Adélaïde Nicole Kengnou Telem   +4 more
doaj   +1 more source

Dynamic S-Box Design Using a Novel Square Polynomial Transformation and Permutation

open access: yesIEEE Access, 2021
New era ciphers employ substitution boxes (S-boxes) which assist in the provision of security for the plaintext in the encryption phase and transforming the ciphertext on the receiver side into original plaintext in the decryption phase.
Amjad Hussain Zahid   +11 more
doaj   +1 more source

Consequences of Pure Point Diffraction Spectra for Multiset Substitution Systems [PDF]

open access: yes, 2009
There is a growing body of results in the theory of discrete point sets and tiling systems giving conditions under which such systems are pure point diffractive.
Lee, Jeong-Yup   +2 more
core   +1 more source

Design of Nonlinear Component of Block Cipher Using Gravesian Octonion Integers

open access: yesIEEE Access, 2023
Being the only nonlinear component in many cryptosystems, an S-box is an integral part of modern symmetric ciphering techniques that creates randomness and increases confidentiality at the substitution stage of the encryption.
Muhammad Irfan   +5 more
doaj   +1 more source

A fast branch-and-prune algorithm for the position analysis of spherical mechanisms [PDF]

open access: yes, 2019
The final publication is available at link.springer.comDifferent branch-and-prune schemes can be found in the literature for numerically solving the position analysis of spherical mechanisms.
Alexander Morgan   +9 more
core   +1 more source

Substituted Purines as High-Affinity Histamine H3 Receptor Ligands

open access: yesPharmaceuticals, 2022
Continuing with our program to obtain new histamine H3 receptor (H3R) ligands, in this work we present the synthesis, H3R affinity and in silico studies of a series of eight new synthetically accessible purine derivatives. These compounds are designed from the isosteric replacement of the scaffold presented in our previous ligand, pyrrolo[2,3-d ...
Christian Espinosa-Bustos   +7 more
openaire   +4 more sources

Maximal equicontinuous factors and cohomology for tiling spaces [PDF]

open access: yes, 2012
We study the homomorphism induced on cohomology by the maximal equicontinuous factor map of a tiling space. We will see that this map is injective in degree one and has torsion free cokernel.
Barge, Marcy   +2 more
core   +3 more sources

Determining pure discrete spectrum for some self-affine tilings [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
Discrete ...
Shigeki Akiyama   +2 more
doaj   +1 more source

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