Results 41 to 50 of about 8,035 (253)

Clustering of Whole-Brain White Matter Short Association Bundles Using HARDI Data

open access: yesFrontiers in Neuroinformatics, 2017
Human brain connectivity is extremely complex and variable across subjects. While long association and projection bundles are stable and have been deeply studied, short association bundles present higher intersubject variability, and few studies have ...
Claudio Román   +9 more
doaj   +1 more source

Flat affine transformations and their transformations

open access: yes, 2020
More references have been added. In particular, the reference to Jack Vey's thesis. We have corrected some typos and included some other changes. arXiv admin note: text overlap with arXiv:1707.07030International audienceWe give a characterization of flat
Villabon, A.   +2 more
core   +2 more sources

Structurofunctional resting-state networks correlate with motor function in chronic stroke

open access: yesNeuroImage: Clinical, 2017
Purpose: Motor function and recovery after stroke likely rely directly on the residual anatomical connections in the brain and its resting-state functional connectivity.
Benjamin T. Kalinosky   +2 more
doaj   +1 more source

One shot lumen mesh generation of abdominal aortic aneurysm by hybrid neural network [PDF]

open access: yesDigital Diagnostics
BACKGROUND: The majority of current algorithms for blood flow surface extraction in the context of hemomodeling of abdominal aortic aneurysms are derived through a segmentation step, rather than directly from CT scans [1].
Rostislav Yu. Epifanov   +2 more
doaj   +1 more source

On a Metric Affine Manifold with Several Orthogonal Complementary Distributions

open access: yesMathematics, 2021
A Riemannian manifold endowed with k>2 orthogonal complementary distributions (called here an almost multi-product structure) appears in such topics as multiply twisted or warped products and the webs or nets composed of orthogonal foliations.
V. Rovenski, S. Stepanov
semanticscholar   +1 more source

The Mixed Scalar Curvature of Almost-Product Metric-Affine Manifolds, II

open access: yesResults in Mathematics, 2021
We continue our study of the mixed Einstein–Hilbert action as a functional of a pseudo-Riemannian metric and a linear connection. Its geometrical part is the total mixed scalar curvature on a smooth manifold endowed with a distribution or a foliation. We
V. Rovenski, Tomasz Zawadzki
semanticscholar   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

Einstein Gravity, Lagrange-Finsler Geometry, and Nonsymmetric Metrics

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2008
We formulate an approach to the geometry of Riemann-Cartan spaces provided with nonholonomic distributions defined by generic off-diagonal and nonsymmetric metrics inducing effective nonlinear and affine connections.
Sergiu I. Vacaru
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

A note on geodesic and almost geodesic mappings of homogeneous Riemannian manifolds [PDF]

open access: yesOpuscula Mathematica, 2005
Let \(M\) be a differentiable manifold and denote by \(\nabla\) and \(\tilde{\nabla}\) two linear connections on \(M\). \(\nabla\) and \(\tilde{\nabla}\) are said to be geodesically equivalent if and only if they have the same geodesics.
Stanisław Formella
doaj  

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