Results 61 to 70 of about 953,765 (299)

Spatially-Coupled QLDPC Codes [PDF]

open access: yesQuantum
Spatially-coupled (SC) codes is a class of convolutional LDPC codes that has been well investigated in classical coding theory thanks to their high performance and compatibility with low-latency decoders.
Siyi Yang, Robert Calderbank
doaj   +1 more source

Algebraic cycles and the classical groups II: Quaternionic cycles [PDF]

open access: yesGeometry & Topology, 2005
Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol9/paper27.abs ...
Lawson, H Blaine   +2 more
openaire   +3 more sources

Uniqueness of Algebraic Limit Cycles for Quadratic Systems [PDF]

open access: yes, 2001
We know five different families of algebraic limit cycles in quadratic systems, one of degree 2 and four of degree 4. Moreover, if there are other families of algebraic limit cycles for quadratic systems, then their degrees must be larger than 4.
Llibre, Jaume   +2 more
core   +1 more source

Tau Aggregate Imaging and Transcriptomics of Alzheimer's Disease Brain at Different Stages of Disease

open access: yesAdvanced Science, EarlyView.
The protein aggregates and gene expression in the middle temporal gyrus (MTG) and somatosensory cortex (SOM) of the postmortem brains of 13 Alzheimer's disease patients were studied in detail, revealing that small hyperphosphorylated tau aggregates increase with Braak stage driven by microglial inflammation.
Elizabeth A. English   +9 more
wiley   +1 more source

Geometry of Nonequilibrium Reaction Networks

open access: yesPhysical Review X, 2023
The modern thermodynamics of discrete systems is based on graph theory, which provides both algebraic methods to define observables and a geometric intuition of their meaning and role.
Sara Dal Cengio   +2 more
doaj   +1 more source

Chemotherapy‐Activated GSK3β‐DNMT1 Signaling Upregulates CD47 to Evade Macrophage Phagocytosis and Drive Temozolomide Resistance in Glioblastoma

open access: yesAdvanced Science, EarlyView.
Temozolomide treatment activates GSK3β, driving DNMT1 phosphorylation, destabilization, and CD47 promoter hypomethylation in glioblastoma. This epigenetic shift upregulates CD47, enabling TMZ‐treated GBM cells to evade macrophage phagocytosis, survive chemotherapy, and acquire resistance.
Jie Li   +11 more
wiley   +1 more source

Cubic and quartic planar differential systems with exact algebraic limit cycles

open access: yesElectronic Journal of Differential Equations, 2011
We construct cubic and quartic polynomial planar differential systems with exact limit cycles that are ovals of algebraic real curves of degree four. The result obtained for the cubic case generalizes a proposition of [9].
Ahmed Bendjeddou, Rachid Cheurfa
doaj  

Piecewise linear differential systems with an algebraic line of separation

open access: yesElectronic Journal of Differential Equations, 2020
We study the number of limit cycles of planar piecewise linear differential systems separated by a branch of an algebraic curve. We show that for each $n\in\mathbb{N}$ there exist piecewise linear differential systems separated by an algebraic curve ...
Armengol Gasull   +2 more
doaj  

Towards an algebraic method of solar cycle prediction

open access: yesJournal of Space Weather and Space Climate, 2020
We discuss the potential use of an algebraic method to compute the value of the solar axial dipole moment at solar minimum, widely considered to be the most reliable precursor of the activity level in the next solar cycle.
Petrovay Kristóf   +2 more
doaj   +1 more source

Algebraic limit cycles in piecewise linear differential systems

open access: yes, 2021
This paper is devoted to study the algebraic limit cycles of planar piecewise linear differential systems. In particular we present examples exhibiting two explicit hyperbolic algebraic limit cycles, as well as some 1-parameter families with a saddle ...
Buzzi, Claudio.   +2 more
core  

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