Results 51 to 60 of about 303,599 (157)

Impact of Hypoxemia Severity on Cardiac Autonomic Regulation in Children With Sleep‐Disordered Breathing: A McGill Oximetry‐Based Analysis

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep‐related breathing disorders (SRBD) represent a significant paediatric health concern. Traditional polysomnographic indices, such as the apnoea–hypopnoea index, may not fully capture the physiological burden of paediatric SRBD, highlighting the need to better characterise the impact of nocturnal hypoxemia on cardiac autonomic regulation ...
Gintare Oboleviciene, Ausra Snipaitiene, Valdone Miseviciene   +2 more
wiley   +1 more source

Accurate and reliable segmentation of the optic disc in digital fundus images [PDF]

, 2014
We describe a complete pipeline for the detection and accurate automatic segmentation of the optic disc in digital fundus images. This procedure provides separation of vascular information and accurate inpainting of vessel-removed images, symmetry-based ...
Giachetti, Andrea, Emanuele Trucco, Trucco, Emanuele; id_orcid, Lucia Ballerini, Ballerini, Lucia   +4 more
core   +1 more source

Cumulative occupational lumbar load and lumbar disc disease : results of a German multi-center case-control study (EPILIFT) [PDF]

, 2009
Background The to date evidence for a dose-response relationship between physical workload and the development of lumbar disc diseases is limited. We therefore investigated the possible etiologic relevance of cumulative occupational lumbar load to lumbar
Grifka, Joachim, Ditchen Dirk, Joachim Grifka, Hofmann Friedrich, Martina Michaelis, Ellegast Rolf, Oliver Linhardt, Annekatrin Bergmann, Elsner Gine, Petereit-Haack, Gabriela, Jäger Matthias, Rolf Ellegast, Ditchen, Dirk Marcel, Luttmann, Alwin, Schumann Barbara, Seidler, Andreas, Haerting Johannes, Seidler Andreas, Luttmann Alwin, Jäger, Matthias, Grifka Joachim, Friedrich Hofmann, Schumann, Barbara, Andreas Seidler, Michaelis, Martina, Johannes Haerting, Bergmann, Annekatrin, Alwin Luttmann, Haerting, Johannes, Elsner, Gine, Ulrich Bolm-Audorff, Ellegast, Rolf, Bolm-Audorff, Ulrich, Barbara Schumann, Michaelis Martina, Dirk Ditchen, Hofmann, Friedrich, Petereit-Haack Gabriela, Bolm-Audorff Ulrich, Gine Elsner, Gabriela Petereit-Haack, Ellegast, Rolf Peter, Linhardt Oliver, Ditchen, Dirk, Bergmann Annekatrin, Linhardt, Oliver, Matthias Jäger   +46 more
core   +2 more sources

An Investigation into the Influence of the Contact Pressure Distribution at the Friction Pair Interface on Disc Brake Squeal [PDF]

The main purpose of this thesis is to investigate the dynamic centre of pressure during a noisy brake application. A novel technique is employed to measure the centre of pressure and contact pressure distribution between the disc/pad interfaces during ...
Ashraf, Naveed
core   +3 more sources

Radon transforms and the SYK model

Journal of High Energy Physics
Motivated by recent work on the Sachdev-Ye-Kitaev (SYK) model, we consider the effect of Radon or X-ray transformations, on the Laplace eigenfunctions in hyperbolic Bolyai-Lobachevsky space.
Michael Stone
doaj   +1 more source

On the integrability and dynamics of the Hide, Skeldon and Acheson differential system

Electronic Journal of Qualitative Theory of Differential Equations
The family of systems \begin{equation*} \dot{x}= x(y-1)-\beta z,\quad \dot{y}= \alpha (1-x^2)-\kappa y, \quad \dot{z}= x-\lambda z, \end{equation*} where $(x,y,z) \in \mathbb{R}^3$ and $\alpha$, $\beta$, $\kappa$, $\lambda$ are real parameters, was ...
Érika Diz-Pita, Jaume Llibre, M. Victoria Otero-Espinar, Claudia Valls   +3 more
doaj   +1 more source

What in the World Are 4D Shapes?

Noûs, EarlyView.
ABSTRACT It is often said that in special relativity, 4D shapes can be used to explain 3D shape projections onto frames of reference. Perdurantists have frequently used this as a motivation for their view of persistence. Despite this, philosophers never clearly state what 4D shapes are.
Jack Himelright, Sebastián Murgueitio Ramírez   +1 more
wiley   +1 more source

Die Fuchs'schen Funktionen im Briefwechsel zwischen Henri Poincaré und Lazarus Fuchs : Sommer 1880 [PDF]

, 2012
Briefwechsel zwischen Henri Poincaré und Lazarus Fuchs über die Verallgemeinerung des Umkehrproblems (Fuchssche Funktionen)
Poincaré, Henri, Fuchs, Lazarus
core   +1 more source

Global phase portraits of quadratic systems with an ellipse and a straight line as invariant algebraic curves

Electronic Journal of Differential Equations, 2015
In this article we study a class of integrable quadratic systems and classify all its phase portraits. More precisely, we characterize the class of all quadratic polynomial differential systems in the plane having an ellipse and a straight line as ...
Jaume Llibre, Jiang Yu
doaj  

The Global Dynamics of the Painlevé–Gambier Equations XVIII, XXI, and XXII

Mathematics
In this paper, we describe the global dynamics of the Painlevé–Gambier equations numbered XVIII: x″−(x′)2/(2x)−4x2=0, XXI: x″−3(x′)2/(4x)−3x2, and XXII: x″−3(x′)2/(4x)+1=0.
Jie Li, Jaume Llibre
doaj   +1 more source