Results 31 to 40 of about 739,090 (133)

Did Lobachevsky have a model of his Imaginary geometry? [PDF]

open access: yes, 2008
Lobachevsky's Imaginary geometry in its original form involved an extension of rather than a radical departure from Euclidean intuition. It wasn't anything like a formal theory in Hilbert's sense and hence didn't require anything like a model.
Rodin, Andrei
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Deep learning for electrocardiogram interpretation: Bench to bedside

open access: yesEuropean Journal of Clinical Investigation, Volume 55, Issue S1, April 2025.
Schematic overview of applications of DL‐enabled ECG analysis and the barriers to implementation of DL tools to clinical practice. Abstract Background Recent advancements in deep learning (DL), a subset of artificial intelligence, have shown the potential to automate and improve disease recognition, phenotyping and prediction of disease onset and ...
Bas B. S. Schots   +6 more
wiley   +1 more source

Numerical Approaches in Nonlinear Fourier Transform‐Based Signal Processing for Telecommunications

open access: yesStudies in Applied Mathematics, Volume 154, Issue 1, January 2025.
ABSTRACT We discuss applications of the inverse scattering transform, also known as the nonlinear Fourier transform (NFT) in telecommunications, both for nonlinear optical fiber communication channel equalization and time‐domain signal processing techniques.
Egor Sedov   +3 more
wiley   +1 more source

On the Question of the Solution of the Wave Equation

open access: yesAdvances in Mathematical Physics, Volume 2025, Issue 1, 2025.
The problem of normal incidence of a plane wave on a layer with a one‐dimensional perturbation of the permittivity of the medium is considered under the condition that the spatial scale of the inhomogeneity can be both much smaller and on the order of the wavelength in vacuum.
A. E. Volvach   +4 more
wiley   +1 more source

Cunning Pathogen Tactics: Neutrophil Movement Influenced by Bacterial Attractants in the Experimental Model

open access: yesCellular Microbiology, Volume 2025, Issue 1, 2025.
To explore the peculiarities of neutrophil motility, two models of chemoattraction were created: a horizontal model, where a container with bacterial chemoattractant was attached laterally to the endotheliocyte monolayer, and a vertical model, simulating a pyemic focus in the lower part of the modified Boyden chamber.
Svetlana N. Pleskova   +5 more
wiley   +1 more source

Enhanced Organ Protection During Cardiopulmonary Bypass in Cardiac Surgery: Synergistic Effects of Nitric Oxide and Hydrogen Therapy

open access: yesJournal of Cardiac Surgery, Volume 2025, Issue 1, 2025.
Background/Aim The present study investigates the effects of isolated administration of nitric oxide (NO) and molecular hydrogen (H2), as well as their combined delivery into the gas supply line of the cardiopulmonary bypass (CPB) circuit. The primary objective is to evaluate their impact on antioxidant activity, biomarkers of myocardial injury, and ...
Vladimir Pichugin   +9 more
wiley   +1 more source

SKYQUANT 3D: Quantifying Vascular Anatomy With an Open‐Source Workflow for Comprehensive Analysis of Volumetric Optoacoustic Angiography Data

open access: yesJournal of Biophotonics, Volume 17, Issue 11, November 2024.
SKYQUANT 3D is a workflow with a set of Python instructions for Avizo, designed to optimize the quantification of optoacoustic angiograms. Our workflow automates batch processing, significantly accelerating volumetric data handling compared to traditional manual methods, thus facilitating analysis of vascular systems in preclinical and clinical ...
Artemii Korobov   +13 more
wiley   +1 more source

A manifold of pure Gibbs states of the Ising model on the Lobachevsky plane

open access: yes, 2013
In this paper we construct many ‘new ’ Gibbs states of the Ising model on the Lobachevsky plane, the millefeuilles. Unlike the usual states on the integer lattices, our foliated states have infinitely many interfaces.
Jean Ruiz, Senya Shlosman, Daniel G
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Quantum-Mechanical Scattering Problem in Lobachevsky Space at Low Energies

open access: yes, 2022
Based on the use of the asymptotics for the wave function of a scattered particle in a Lobachevsky space in a form close to the asymptotics in flat space, general formulas for the theory of quantum mechanical scattering in this space are derived.
Kurochkin, Yu. A.   +3 more
core   +1 more source

ABOUT HERITAGE PRESERVATION OF N.I. LOBACHEVSKY BY KAZAN MATHEMATICIANS AND ABOUT THE HISTORY OF THE CREATION OF THE MUSEUM OF N.I. LOBACHEVSKY AT KAZAN UNIVERSITY [PDF]

open access: yes, 2017
Статья посвящена истории сохранения наследия Н.И. Лобачевского казанскими математиками и истории создания музея Н.И. Лобачевского в Казанском университете.The article is devoted to the history of heritage preservation N.
Широкова О.А.
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