Results 1 to 10 of about 953 (68)

Assessment of Invariant Moments of Fornix in Brain Structural MR Images to Differentiate Mild Cognitive Impairment from Alzheimer’s Disease

open access: yesCurrent Directions in Biomedical Engineering
Alzheimer’s disease (AD) is a progressive neurodegenerative brain disorder that primarily affects elderly individuals. Mild cognitive impairment (MCI) represents an intermediate stage between normal cognitive functioning and the onset of AD.
Ali Ahsan   +2 more
doaj   +2 more sources

Invariant structural and functional brain regions associated with tinnitus: A meta-analysis

open access: yesPLoS ONE, 2022
Tinnitus is a common, functionally disabling condition of often unknown etiology. Neuroimaging research to better understand tinnitus is emerging but remains limited in scope.
John C. Moring   +8 more
doaj   +2 more sources

Phase Transition as an Emergent Phenomenon Analysed by Violation of Structural Invariant (M, BM)

open access: yesMendel, 2020
When modeling complex systems, we usually encounter the following difficulties: partiality, large amounts of data and uncertainty of conclusions. The most common approach used for modeling is the physical approach, sometimes reinforced by statistical ...
Jiri Bila, Ali H Reshak, Jan Chysky
doaj   +1 more source

Atomic ring invariant and Modified CANON extended connectivity algorithm for symmetry perception in molecular graphs and rigorous canonicalization of SMILES

open access: yesJournal of Cheminformatics, 2020
We propose new invariant (the product of the corresponding primes for the ring size of each bond of an atom) as a simple unambiguous ring invariant of an atom that allows distinguishing symmetry classes in the highly symmetrical molecular graphs using ...
Dmytro G. Krotko
doaj   +1 more source

Detection of Emergent Situations in Complex Systems by Structural Invariant (MB, M)

open access: yesMendel, 2017
The paper introduces complete description of the detection method that uses structural invariant Matroid and its Bases (MB, M). There are recapitulated essential concepts from the used knowledge field as “complex system, emergent situations (A, B, C ...
Jiri Bila, Martin Novak
doaj   +1 more source

The uniqueness of DMAX-matrix graph invariants. [PDF]

open access: yesPLoS ONE, 2014
In this paper, we examine the uniqueness (discrimination power) of a newly proposed graph invariant based on the matrix DMAX defined by Randić et al. In order to do so, we use exhaustively generated graphs instead of special graph classes such as trees ...
Matthias Dehmer, Yongtang Shi
doaj   +1 more source

1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions

open access: yesnpj 2D Materials and Applications, 2021
Two-dimensional (2D) lateral heterojunctions between different transition metal dichalcogenides (TMDCs) have been realized in recent years. Homogeneous semiconducting TMDC layers are characterized by a topological invariant, their in-plane electric ...
Sridevi Krishnamurthi, Geert Brocks
doaj   +1 more source

An invariant subspace problem for multilinear operators on Banach spaces and algebras

open access: yesJournal of Inequalities and Applications, 2016
This paper is concerned with the study of invariant subspace problems for nonlinear operators on Banach spaces/algebras. Our study reveals that one faces unprecedented challenges such as lack of vector space structure and unbounded spectral sets when ...
John Emenyu
doaj   +1 more source

The Consequences of Ignoring Measurement Invariance for Path Coefficients in Structural Equation Models

open access: yesFrontiers in Psychology, 2014
We report a Monte Carlo study examining the effects of 2 strategies for handling measurement non-invariance - modeling and ignoring non-invariant items - on structural regression coefficients between latent variables measured with Item Response Theory ...
Nigel eGuenole   +2 more
doaj   +1 more source

A Novel Affine and Contrast Invariant Descriptor for Infrared and Visible Image Registration

open access: yesRemote Sensing, 2018
Infrared and visible image registration is a very challenging task due to the large geometric changes and the significant contrast differences caused by the inconsistent capture conditions.
Xiangzeng Liu   +3 more
doaj   +1 more source

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