Results 31 to 40 of about 422,054 (167)

Altered brain white matter structural motor network in spinocerebellar ataxia type 3

open access: yesAnnals of Clinical and Translational Neurology, 2023
Objectives Spinocerebellar ataxia type 3 is a disorder within the brain network. However, the relationship between the brain network and disease severity is still unclear.
Xin‐Yuan Chen   +10 more
doaj   +1 more source

Interactions Between Aging and Alzheimer’s Disease on Structural Brain Networks

open access: yesFrontiers in Aging Neuroscience, 2021
Normative aging and Alzheimer’s disease (AD) propagation alter anatomical connections among brain parcels. However, the interaction between the trajectories of age- and AD-linked alterations in the topology of the structural brain network is not well ...
Zhanxiong Wu   +7 more
doaj   +1 more source

Topological transitions in metals

open access: yesPhysical Review B, 2019
We investigate if a sharp topological transition in a metal with a large Fermi surface may be detected in transport measurements. In particular, we address if a skew scattering and a side jump on elastic disorder in the bulk of such a metal masks signatures of the topological transition.
Ying, Xuzhe, Kamenev, Alex
openaire   +3 more sources

Chaos-Based Image Encryption: Review, Application, and Challenges

open access: yesMathematics, 2023
Chaos has been one of the most effective cryptographic sources since it was first used in image-encryption algorithms. This paper closely examines the development process of chaos-based image-encryption algorithms from various angles, including symmetric
Bowen Zhang, Lingfeng Liu
doaj   +1 more source

The Mott transition as a topological phase transition [PDF]

open access: yesPhysical Review B, 2020
We show that the Mott metal-insulator transition in the standard one-band Hubbard model can be understood as a topological phase transition. Our approach is inspired by the observation that the mid-gap pole in the self-energy of a Mott insulator resembles the zero-energy spectral pole of the localized surface state in a topological insulator.
Sudeshna Sen   +2 more
openaire   +2 more sources

Conceptions of Topological Transitivity [PDF]

open access: yes, 2011
There are several different common definitions of a property in topological dynamics called "topological transitivity," and it is part of the folklore of dynamical systems that under reasonable hypotheses, they are equivalent.
E. Akin, J. Carlson
semanticscholar   +1 more source

Grain-boundary topological phase transitions [PDF]

open access: yesProceedings of the National Academy of Sciences, 2020
Significance We reveal the existence of a topological phase transition (Kosterlitz–Thouless type) in grain boundaries (GBs)—important internal surfaces in crystalline materials. GB dynamics are controlled by the formation/migration of line defects (disconnections) with dislocation and step character.
Kongtao Chen   +2 more
openaire   +4 more sources

Topology and Phase Transitions: Paradigmatic Evidence [PDF]

open access: yesPhysical Review Letters, 2000
We report upon the numerical computation of the Euler characteristic χ(a topologic invariant) of the equipotential hypersurfaces Σ_v of the configuration space of the two-dimensional lattice $ϕ^4$ model. The pattern χ(Σ_v) vs. v (potential energy) reveals that a major topology change in the family {Σ_v}_{v\in R} is at the origin of the phase transition
Franzosi, R., Pettini, M., Spinelli, L.
openaire   +5 more sources

Strong chain transitivity in hyperspaces of uniform spaces

open access: yesApplied General Topology
We apply topological definitions of strong chain transitivity and characterizetopological strong chain transitivity for the induced maps on hyperspaces ofuniform spaces.
Nooshin Darban Maghami   +2 more
doaj   +1 more source

Induced Representation Method in the Theory of Electron Structure and Superconductivity

open access: yesAdvances in Mathematical Physics, 2019
It is shown that the application of theorems of induced representations method, namely, Frobenius reciprocity theorem, transitivity of induction theorem, and Mackey theorem on symmetrized squares, makes simplifying standard techniques in the theory of ...
V. G. Yarzhemsky
doaj   +1 more source

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