Results 11 to 20 of about 269,629 (262)

Gray matter axonal connectivity maps. [PDF]

open access: yesFrontiers in Psychiatry, 2015
Structural brain connectivity is generally assessed through methods that rely on pre-defined regions of interest (e.g. Brodmann’s areas), thus preventing analyses that are largely free from a-priori anatomical assumptions.
Leonardo eBonilha   +4 more
doaj   +3 more sources

On Modular Gray Map

open access: yesCoRR, 2022
12 pages, note, presented at the Special Session on Algebraic Coding Theory, Central Section Meeting \#995, American Mathematical Society, Athens,OH, 26-27 March ...
openaire   +2 more sources

Gray coding cubic planar maps [PDF]

open access: yesTheoretical Computer Science, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sergey V. Avgustinovich   +3 more
openaire   +4 more sources

The Gray filtration on phantom maps [PDF]

open access: yesFundamenta Mathematicae, 2001
In this well written and interesting paper, the authors study the Gray index of phantom maps. They introduce a new definition of the Gray index which immediately shows its homotopy invariance and allows them to study naturality properties of the index. This allows them to generalize a theorem of McGibbon and Roitberg on surjectivity of induced maps on ...
Lê Minh Hà, Strom, Jeffrey
openaire   +1 more source

Gray Images of Constacyclic Codes Over Some Polynomial Residue Rings

open access: yesپژوهش‌های ریاضی, 2021
Let  be the quotient ring    where  is the finite field of size   and  is a positive integer. A Gray map  of length  over  is a special map from  to ( .
Reza Sobhani
doaj  

The Steganography Based On Chaotic System for Random LSB Positions

open access: yesWasit Journal of Computer and Mathematics Science, 2022
The objective of hiding text in an image is hiding text without raising suspicions that the image contains a hidden message or text, which leads to protecting and maintaining text confidentiality.
Rusul Mansoor Al-Amri   +2 more
doaj   +1 more source

Gray coding planar maps

open access: yesCoRR, 2015
The idea of (combinatorial) Gray codes is to list objects in question in such a way that two successive objects differ in some pre-specified small way. In this paper, we utilize beta-description trees to cyclicly Gray code three classes of cubic planar maps, namely, bicubic planar maps, 3-connected cubic planar maps, and cubic non-separable planar maps.
Sergey V. Avgustinovich   +3 more
openaire   +2 more sources

An Authentication Code over Galois Rings with Optimal Impersonation and Substitution Probabilities

open access: yesMathematical and Computational Applications, 2018
Two new systematic authentication codes based on the Gray map over a Galois ring are introduced. The first introduced code attains optimal impersonation and substitution probabilities.
Juan Carlos Ku-Cauich   +2 more
doaj   +1 more source

Constacyclic codes over 𝔽pm[u1, u2,⋯,uk]/〈 ui2 = ui, uiuj = ujui〉

open access: yesOpen Mathematics, 2018
In this paper, we study linear codes over ring Rk = 𝔽pm[u1, u2,⋯,uk]/〈ui2$\begin{array}{} u^{2}_{i} \end{array} $ = ui, uiuj = ujui〉 where k ≥ 1 and 1 ≤ i, j ≤ k.
Zheng Xiying, Kong Bo
doaj   +1 more source

Quantitative myelin-related maps from R1 and T2* ratio images using a single ME-MP2RAGE sequence in 7T MRI

open access: yesFrontiers in Neuroanatomy, 2022
Background: There still are limitations associated with quantifying myelin content using brain magnetic resonance imaging (MRI) despite several studies conducted on this subject.
Jeong-Min Shim   +4 more
doaj   +1 more source

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