Results 91 to 100 of about 548,689 (195)

Polarization Angle Geodesics in PSRs B1133+16 and B2016+28

The Astrophysical Journal
Recent models of pulsar polarization predict that the position and ellipticity angles of the polarization vector can trace portions of a small or great circle on the Poincaré sphere.
M. M. McKinnon
doaj   +1 more source

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

Analytic treatment of nonparaxial full-Poincaré fields: singularity structure and trapping properties

, 2021
International audienceAn analytic extension to the nonparaxial regime of the full-Poincaré (FP) beams is presented. Instead of the stereographic mapping used in the paraxial case, these FP fields are defined in terms of a mapping from the polarization ...
Gutiérrez–cuevas, Rodrigo, Alonso, Miguel, Miguel A Alonso, Rodrigo Gutiérrez–Cuevas   +3 more
core   +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

Cannabinoid exposure during pregnancy: Cardiorespiratory effects and offspring outcomes

The Journal of Physiology, EarlyView.
Abstract figure legend Prenatal exposure to cannabinoids has been investigated across human and animal studies to understand its impact on physiological development. Evidence suggests that early‐life cannabinoid exposure influence multiple developmental processes, extending beyond neurodevelopmental outcomes to potentially affect placental function ...
Luis Gustavo A. Patrone, Luciane H. Gargaglioni   +1 more
wiley   +1 more source

Infra‐slow brain–heart–gut electrophysiological interactions reveal a co‐ordinated multisystem physiological network in humans

The Journal of Physiology, EarlyView.
Abstract figure legend Simultaneous resting‐state electroencephalographic (EEG), electrocardiographic (ECG) and electrogastrographic (EGG) recordings were processed to extract time‐resolved physiological markers for each organ: EEG alpha‐band power for the brain, cardiac sympathetic and parasympathetic indices (CSI, CPI) for the heart and EGG power for
Giovanni Sitti, Laura Pitti, Diego Candia‐Rivera   +2 more
wiley   +1 more source

Sphere of arbitrarily polarized exceptional points with a single planar metasurface

Nature Communications
Exceptional points (EPs) are spectral singularities of non-Hermitian systems and represent the coalescence of eigenvalues and eigenstates. Traditional photonic systems typically exhibit coalesced eigenstates that correspond to circular polarizations of a
Haoye Qin, Zijin Yang, Po-Sheng Huang, Xinyang Mu, Shih-Hsiu Huang, Yuzhi Shi, Wannian Zhao, Bo Li, Ji Zhou, Jesús Zúñiga-Pérez, Patrice Genevet, Pin Chieh Wu, Qinghua Song   +12 more
doaj   +1 more source

Numerical Study of Polarization Dynamics in Optical Fibers with a Harmonically Rotating Birefringence Axis using Stokes Vectors Approach [PDF]

فیزیک کاربردی ایران
The control and analysis of polarization dynamics in optical fibers in the presence of birefringence are important, particularly for sensitive applications such as quantum communications and optical sensors.
Somaye Zare, Marzieh Akbari Jafar Abadi, Davood Razzaghi   +2 more
doaj   +1 more source

Henri Poincaré electrons to special relativity: translation of selected papers and discussion

, 2020
Produced by an award-winning translator of Henri Poincaré, this book contains translations of several seminal articles by Poincaré and discusses the experimental and theoretical investigations of electrons that form their context. In the 1950s, a dispute
Poincaré, Henri, Popp, Bruce D
core   +1 more source

Stochastic Galerkin and Monte Carlo Methods for Parabolic Problems: Numerical Performance of Variational Matrix‐Free Approximations

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT Stochastic Galerkin methods offer unexplored potential for the numerical simulation of parabolic problems with random variables, in particular if they are combined with variational discretizations of the space and time variables. Due to the high dimensionality, the solution of the arising algebraic systems do not become feasible without ...
Moataz Dawor, Nils Margenberg, Markus Bause   +2 more
wiley   +1 more source