Results 31 to 40 of about 12,289 (137)

Understanding Atrial Fibrillation Complexity Through the Lens of Turbulence Dynamics: Implications for Treatment Strategies

Journal of Cardiovascular Electrophysiology, EarlyView.
ABSTRACT Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. Its incidence increases significantly with age and has become a major global public health issue. Although research into the mechanisms of AF has spanned over a century‐ranging from the reentry theory to the rotor hypothesis‐none of these
Xin Chu, Xiaohan Jiang, Qing Qiao, Xiaojun Wang, Hong Ye   +4 more
wiley   +1 more source

Exploring Weak Gravitational Lensing Effects by a Regular Black Hole

Spektra: Jurnal Fisika dan Aplikasinya
Gravitational lensing is one of the physical consequences of Einstein’s general theory of relativity, which has been observationally confirmed. This work aims to study the weak gravitational lensing scenario where the lens is a spherically symmetric ...
A. K. Durrani, H. S. Ramadhan
doaj   +1 more source

Describing variations of the Fisher-matrix across parameter space

, 2016
Forecasts in cosmology, both with Monte-Carlo Markov-chain methods and with the Fisher matrix formalism, depend on the choice of the fiducial model because both the signal strength of any observable as well as the model nonlinearities linking observables
Reischke, Robert, Schäfer, Björn Malte
core   +1 more source

On the Electromagnetic Energy Flow Along Geodesics

Radio Science, Volume 61, Issue 1, January 2026.
Abstract We present a field‐theoretic framework for modeling electromagnetic energy propagation in heterogeneous media by introducing the concept of electromagnetic geodesics. Unlike traditional ray optics, which assumes either a straight‐line propagation or a simple bending in refractive media, our approach formulates wave propagation as geodetic ...
Jacob T. Fokkema, Peter M. van den Berg
wiley   +1 more source

Observations of Small‐Scale Heterogeneity in the Upper Mantle Beneath Old Oceanic Lithosphere

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract We present tomographic images of the velocity structure of the upper mantle beneath old (∼90 ${\sim} 90$ Ma) oceanic lithosphere, derived from arrival time measurements of teleseismic body waves recorded by ocean‐bottom seismometers. Differential travel time measurements on P, S, and SKS body waves across a wide range of frequency bands show ...
A. Hariharan, Z. Eilon, J. Gaherty, J. Russell, J. Phillips, D. Forsyth   +5 more
wiley   +1 more source

Constraints on Compact Dark Matter from the Nonobservation of Gravitational-wave Strong Lensing

The Astrophysical Journal
We use the nonobservation of strong lensing of gravitational waves (GWs) in the first three observation runs of the LIGO and Virgo detectors to constrain the fraction of dark matter in the form of compact objects (COs) in the mass range 10 ^6 −10 ^9 M _⊙
A. Barsode, S. J. Kapadia, P. Ajith
doaj   +1 more source

Gravitational Effects on the Neutrino Oscillation [PDF]

, 1996
The propagation of neutrinos in a gravitational field is studied. A method of calculating a covariant quantum-mechanical phase in a curved space-time is presented.
Bilenky, C. Giunti, C.W. Kim, Cardall, Fornengo, Giunti, J. Song, N. Fornengo, Piriz, Stodolsky   +9 more
core   +5 more sources

Rethinking Global Soil Degradation: Drivers, Impacts, and Solutions

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The increasing threat of soil degradation presents significant challenges to soil health, especially within agroecosystems that are vital for food security, climate regulation, and economic stability. This growing concern arises from intricate interactions between land use practices and climatic conditions, which, if not addressed, could ...
Nima Shokri, David A. Robinson, Mehdi Afshar, Christine Alewell, Milad Aminzadeh, Emmanuel Arthur, Nils Broothaerts, Grant A. Campbell, Lina Eklund, Surya Gupta, Richard Harper, Amirhossein Hassani, Cathy Hohenegger, Thomas Keller, Maximilian Kiener, Inma Lebron, Kaveh Madani, Tshilidzi Marwala, Francis Matthews, Per Moldrup, Attila Nemes, Panos Panagos, Remus Prăvălie, Matthias C. Rillig, Philipp Saggau, Salome M. S. Shokri‐Kuehni, Pete Smith, Amy Thomas, Lis Wollesen de Jonge, Dani Or   +29 more
wiley   +1 more source

Strong field limit analysis of gravitational retro-lensing

, 2003
We present a complete treatment in the strong field limit of gravitational retro-lensing by a static spherically symmetric compact object having a photon sphere.
A. Bhadra, D.E. Holtz, Diego F. Torres, E. Algol, E.F. Eiroa, Ernesto F. Eiroa, F. De Paolis, K.S. Virbhadra, K.S. Virbhadra, R. Schödel, S. Capozziello, S. Frittelli, V. Bozza, V. Bozza, V. Bozza, V. Bozza   +15 more
core   +1 more source

Staged ecologies: Aesthetics, nature and infrastructure in the late‐modern metropolis

Transactions of the Institute of British Geographers, Volume 50, Issue 4, December 2025.
Short Abstract This paper examines the relationship between urban nature and landscape design within a £1.5 billion regeneration project that is currently unfolding in Thamesmead, a town in south‐east London. It develops the notion of ‘staged ecologies’ to examine how urban nature is being spatially and aesthetically arranged across the town's ...
Zuhri James
wiley   +1 more source