Results 81 to 90 of about 6,627,879 (323)

Alzheimer's Disease Co‐Pathology and Cognitive Impairment in Amyotrophic Lateral Sclerosis

Annals of Neurology, Volume 100, Issue 1, Page 123-138, July 2026.
Objectives Amyotrophic lateral sclerosis (ALS) and Alzheimer's disease (AD) share neuropathological features, including tau, amyloid, and TDP‐43 pathology. This study investigated whether AD‐related pathological changes are associated with cognitive impairment ALS. Methods Cerebrospinal fluid (CSF total‐tau, phosphorylated‐tau, beta‐amyloid) and plasma
Elisabeth Kasper, Annaliis Lehto, Alexandra Jürs, Nina Nordmann, Oliver Peters, Julian Hellmann, Josef Priller, Eike Jakob Spruth, Gabor C. Petzold, Ina Voigt, Patrick Weydt, Sarah Bernsen, Elisabeth Dinter, Björn Falkenburger, René Günther, Emrah Düzel, Wenzel Glanz, Matthis Synofzik, Lukas Beichert, Annika Spottke, Michael Wagner, Frederic Brosseron, Matthias C. Schmid, Annett Halle, Jochen Herms, Anja Schneider, Stefan Teipel, Johannes Prudlo, Manuela Neumann, Andreas Hermann   +29 more
wiley   +1 more source

Illuminating new and known relations between knot invariants

Machine Learning: Science and Technology
We automate the process of machine learning correlations between knot invariants. For nearly 200 000 distinct sets of input knot invariants together with an output invariant, we attempt to learn the output invariant by training a neural network on the ...
Jessica Craven, Mark Hughes, Vishnu Jejjala, Arjun Kar   +3 more
doaj   +1 more source

On the cohomology theory of knot groups [PDF]

, 2017
This thesis deals with the cohomology theory of groups, attempting, in particular to find a proof of the following conjecture. Conjecture: All knot groups have cohomological dimension 2.
Vlagsma, Cornelis Paul
core   +1 more source

Deformation of medium having string structure

Vietnam Journal of Mechanics, 2005
In this paper we constructed a model of plastic deformation of the medium having string structure. The knot theory was used to classify the plastic state.
Trinh Van Khoa
doaj   +1 more source

Nahm sums, quiver A-polynomials and topological recursion

Journal of High Energy Physics, 2020
We consider a large class of q-series that have the structure of Nahm sums, or equivalently motivic generating series for quivers. First, we initiate a systematic analysis and classification of classical and quantum A-polynomials associated to such q ...
Hélder Larraguível, Dmitry Noshchenko, Miłosz Panfil, Piotr Sułkowski   +3 more
doaj   +1 more source

Supporting Third Year Medical Students' Skill Acquisition and Self-Efficacy with Coping Models and Process Feedback during Laparoscopic Knot Tying Simulation

Frontiers in Psychology, 2017
Background: During the third year general surgery clerkship, medical students are required to develop laparoscopic knot-tying skills. Knot-tying skills studies often rely on objective variables (e.g., time, materials used, number of iterations) that lend
Michael S. Dempsey, Douglas F. Kauffman
doaj   +1 more source

Knot theory with the Lorentz group [PDF]

Fundamenta Mathematicae, 2005
We analyse the perturbative expansion of the knot invariants defined from the unitary representations of the Quantum Lorentz Group in two different ways, namely using the Kontsevich Integral and weight systems, and the $R$-matrix in the Quantum Lorentz Group defined by Buffenoir and Roche. The two formulations are proved to be equivalent; and they both
openaire   +2 more sources

A New Paradigm for Understanding the Rheology and Processability of Poly(p‐Phenylene Terephthalamide) Liquid‐Crystalline Solutions

Journal of Applied Polymer Science, EarlyView.
Kevlar is traditionally modeled as a rigid‐rod polymer, yet rheological behavior deviates from this assumption. The review introduces a novel “twist‐tie” entanglement theory for aramid polymer chains in the nematic liquid crystal state, providing a molecular explanation for deviations from rigid‐rod models. Understanding twist‐tie entanglement dynamics
Emma Egli, Jacob L. Pretko, Christopher W. Seay, Steven R. Lustig   +3 more
wiley   +1 more source

Nuclear Binding Energies from Composite-Knot Ropelength: A Topological Model That Mirrors Quantum-Mechanical Phenomenology

Particles
We report a curious numerical observation: If atomic nuclei are modelled as connect-sums of threefoil knots with alternating chirality, the ropelength of the composite knot—a purely geometric quantity requiring no quantum mechanics—tracks the ...
Thomas Riedel
doaj   +1 more source

A Survey of Hyperbolic Knot Theory [PDF]

, 2019
20 pages, 5 ...
Futer, David, Kalfagianni, Efstratia, Purcell, Jessica S.   +2 more
openaire   +2 more sources