Results 11 to 20 of about 4,370 (140)
Neuromodulation: Technology at the Neural Interface, EarlyView., 2021 Abstract Background Posttraumatic stress disorder (PTSD) is associated with autonomic dysfunction as indicated by deficits in the sympathetic and parasympathetic nervous systems. These abnormalities are expressed as elevated heart rate and reduced heart rate variability (HRV), respectively.
Camila Cosmo +4 more
wiley +1 more source
Are physiological oscillations physiological?
The Journal of Physiology, EarlyView., 2023 Abstract figure legend Mechanisms and functions of physiological oscillations. Abstract Despite widespread and striking examples of physiological oscillations, their functional role is often unclear. Even glycolysis, the paradigm example of oscillatory biochemistry, has seen questions about its oscillatory function.
Lingyun (Ivy) Xiong, Alan Garfinkel
wiley +1 more source
M-theory compactifications on hyperbolic spaces [PDF]
, 2007 Negatively-curved, maximally symmetric hyperbolic spaces enjoy a number of remarkable properties that can be traced back to Riemannian geometry, group theory and algebraic geometry.
Orlando, Domenico
core +2 more sources
Conjugacy class of homeomorphisms and distortion elements in groups of homeomorphisms [PDF]
, 2017 Let S be a compact connected surface and let f be an element of the group Homeo\_0(S) of homeomorphisms of S isotopic to the identity. Denote by \tilde{f} a lift of f to the universal cover of S. Fix a fundamental domain D of this universal cover.
Militon, Emmanuel
core +3 more sources
On the cyclicity of Kolmogorov polycycles
Electronic Journal of Qualitative Theory of Differential Equations, 2022 In this paper we study planar polynomial Kolmogorov's differential systems \[ X_\mu\quad\begin{cases}{\dot{x}=f(x,y;\mu),}\\{\dot{y}=g(x,y;\mu),} \end{cases} \] with the parameter $\mu$ varying in an open subset $\Lambda\subset\mathbb{R}^N ...
David Marín, Jordi Villadelprat
doaj +1 more source
Gauge fixing in (2+1)-gravity with vanishing cosmological constant [PDF]
, 2012 We apply Dirac's gauge fixing procedure to (2+1)-gravity with vanishing cosmological constant. For general gauge fixing conditions based on two point particles, this yields explicit expressions for the Dirac bracket.
Meusburger, Catherine +1 more
core +1 more source
The Quaternionic Hardy Space and the Geometry of the Unit Ball
Bruno Pini Mathematical Analysis Seminar, 2015 The quaternionic Hardy space of slice regular functions H2(B) is a reproducing kernel Hilbert space. In this note we see how this property can be exploited to construct a Riemannian metric on the quaternionic unit ball B and we study the geometry arising
Giulia Sarfatti
doaj +1 more source
The hyperbolic geometry of financial networks
Scientific Reports, 2021 Based on data from the European banking stress tests of 2014, 2016 and the transparency exercise of 2018 we construct networks of European banks and demonstrate that the latent geometry of these financial networks can be well-represented by geometry of ...
Martin Keller-Ressel, Stephanie Nargang
doaj +1 more source
Non-relativistic supersymmetry on curved three-manifolds
Journal of High Energy Physics, 2020 We construct explicit examples of non-relativistic supersymmetric field theories on curved Newton-Cartan three-manifolds. These results are obtained by performing a null reduction of four-dimensional supersymmetric field theories on Lorentzian manifolds ...
E.A. Bergshoeff +4 more
doaj +1 more source
Fractal basins of escape and the formation of spiral arms in a galactic potential with a bar [PDF]
, 2014 We investigate the dynamics in the close vicinity of and within the critical area in a 2D effective galactic potential with a bar of Zotos. We have calculated Poincar\'e surfaces of section and the basins of escape.
Ernst, Andreas, Peters, Thomas
core +1 more source