Results 11 to 20 of about 111,366 (373)

Systoles of Hyperbolic Manifolds [PDF]

open access: yesAlgebraic & Geometric Topology, 2011
We show that for every $n\geq 2$ and any $\epsilon>0$ there exists a compact hyperbolic $n$-manifold with a closed geodesic of length less than $\epsilon$. When $\epsilon$ is sufficiently small these manifolds are non-arithmetic, and they are obtained by
Belolipetsky, Mikhail, Thomson, Scott A.
core   +5 more sources

Systole: A python package for cardiac signal synchrony and analysis

open access: yesJournal of Open Source Software, 2022
Systole is a package for cardiac signal analysis in Python. It provides an interface for recording cardiac signals via electrocardiography (ECG) or photoplethysmography (PPG), as well as both online and offline data analysis methods extracting cardiac ...
Nicolas Legrand, M. Allen
semanticscholar   +1 more source

Diastolic heart failure: boundaries of term application

open access: yesБюллетень сибирской медицины, 2023
Important changes regarding the understanding of the pathogenesis of chronic heart failure (CHF) marked the beginning of the millennium, and its first decade was called the decade of diastology.
V. V. Kalyuzhin   +11 more
doaj   +1 more source

On foliations of bounded mean curvature on closed three-dimensional Riemannian manifolds

open access: yesPracì Mìžnarodnogo Geometričnogo Centru, 2023
The notion of systole of a foliation sys(ℱ) on an arbitrary foliated closed Riemannian manifold (M,ℱ) is introduced. A lower bound on sys(ℱ) of a bounded mean curvature foliation is given.
Dmytry Bolotov
doaj   +1 more source

Diastolic and Systolic Longitudinal Myocardial Velocities of Healthy Racing Pigeons (Columba livia f. domestica) Measured by Tissue Doppler Imaging

open access: yesVeterinary Sciences, 2021
Tissue Doppler imaging (TDI) is a noninvasive sonographic method of acquiring and quantifying myocardial velocities. This technique is used in human and small animal medicine to diagnose cardiac diseases.
Marko Legler   +3 more
doaj   +1 more source

Numerical study of hemodynamics after stent implantation during the cardiac cycle

open access: yesJournal of Mechanical Engineering and Sciences, 2021
The descending aortic aneurysm is one of the most catastrophic cardiovascular emergencies resulting in high mortality worldwide. Clinical observations have pointed out that stent implantation in the sick aorta should probably allow stabilization of the ...
A. Belaghit   +4 more
doaj   +1 more source

Correlation of physical and functional of cardiovascular young footballer 14-16 years [PDF]

open access: yesPedagogìka, Psihologìâ ta Mediko-bìologìčnì Problemi Fìzičnogo Vihovannâ ì Sportu, 2013
In a competition period were studied the indexes of general and special physical preparedness of young footballers aged 14 - 16 years old. On the basis of research of electrocardiograms dependence of indexes of physical preparedness of young footballers ...
Swistun Y.D.   +3 more
doaj   +1 more source

Local maxima of the systole function [PDF]

open access: yesJournal of the European Mathematical Society (Print), 2018
We construct infinite families of closed hyperbolic surfaces that are local maxima for the systole function on their respective moduli spaces. The systole takes values along a linearly divergent sequence $(L_n)_{n\geq 1}$ at these local maxima.
Maxime Fortier Bourque, Kasra Rafi
semanticscholar   +1 more source

Color Flow Doppler Echocardiography in Healthy Racing Pigeons (Columba livia f. domestica) and the Evidence of Physiological Blood Flow Vortex Formations

open access: yesVeterinary Sciences, 2020
In avian medicine, Doppler sonographic techniques are used to visualize and estimate blood flow in the heart. In the literature there is a lack of standardized studies of the use of color Doppler flow on healthy avian species.
Marko Legler   +3 more
doaj   +1 more source

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