Results 41 to 50 of about 4,368 (136)

Phosphoryl Halogen and Hydrogen Bonding Controls the Solid‐State Structures of Aryl Halide‐Containing Phosphonates

European Journal of Inorganic Chemistry, EarlyView.
Intramolecular (RO)2PO→Halogen interaction versus intermolecular (RO)2PO···HOH hydrogen bonds. Although the O···I distance is shorter than the sum of the van der Waals radii of the atoms involved, there is no covalency involved in this interaction.
David Mross, Paweł Horeglad, Bastian Grabe, Wolf Hiller, Vito Lippolis, Massimiliano Arca, Klaus Jurkschat   +6 more
wiley   +1 more source

Comparison of Invariant Metrics [PDF]

, 2010
We estimate the boundary behavior of the Kobayashi metric on $\C\sm\set{0,1}$. We also compare the Bergman metric on the ring domain in $\C^{2}$ to the Bergman metric on the ball.Comment: submitted.
Kang, Hyunsuk, Lee, Lina, Zeager, Crystal   +2 more
core  

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Early Maturation of Heart Rate Variability in Very Preterm Infants Depends on Neonatal Factors and Is Associated With Neurodevelopmental Risk

Acta Paediatrica, EarlyView.
ABSTRACT Aim This study investigated central autonomic network maturation deviations using a previously defined machine learning model set to estimate a functional maturation age (FMA) from heart rate variability (HRV) analysis. We investigated whether these deviations were associated with maternal, fetal, perinatal, or postnatal complications and with
Léa Bonneau, Cyril Flamant, Maxime Esvan, Jean Michel Roué, Géraldine Favrais, Géraldine Gascoin, Sandie Cabon, Fabienne Porée, Guy Carrault, Patrick Pladys   +9 more
wiley   +1 more source

Nonlinear Dynamic Analysis of Rotor Rub-Impact System

Shock and Vibration, 2019
A dynamic model of a double-disk rub-impact rotor-bearing system with rubbing fault is established. The dynamic differential equation of the system is solved by combining the numerical integration method with MATLAB.
Youfeng Zhu, Zibo Wang, Qiang Wang, Xinhua Liu, Hongyu Zang, Liang Wang   +5 more
doaj   +1 more source

Establishing Shape Correspondences: A Survey

Computer Graphics Forum, EarlyView.
Abstract Shape correspondence between surfaces in 3D is a central problem in geometry processing, concerned with establishing meaningful relations between surfaces. While all correspondence problems share this goal, specific formulations can differ significantly: Downstream applications require certain properties that correspondences must satisfy ...
A. Heuschling, H. Meinhold, L. Kobbelt
wiley   +1 more source

On the arithmetic of crossratios and generalised Mertens' formulas

, 2013
We develop the relation between hyperbolic geometry and arithmetic equidistribution problems that arises from the action of arithmetic groups on real hyperbolic spaces, especially in dimension up to 5.
Parkkonen, Jouni, Paulin, Frédéric
core   +3 more sources

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

Oral Manifestations of Non Vascular Ehlers‐Danlos Syndrome Cross‐Sectional Study

Oral Diseases, EarlyView.
ABSTRACT Background Ehlers–Danlos syndromes are rare hereditary connective tissue disorders; however, their oral manifestations remain poorly characterized in molecularly confirmed individuals. The aim of this study was to describe the oral phenotype of patients with non‐vascular Ehlers‐Danlos syndromes compared to healthy controls.
Aude Grand, Benjamin P. J. Fournier, Grégoire Chevalier, Karelle Benistan, François Côme Ferré   +4 more
wiley   +1 more source

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