Results 71 to 80 of about 42,716 (206)
Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
Archives of Mechanics, 2019 The probabilistic solutions of the elastic stretched beam are studied under the excitation of Kanai–Tajimi ground motion. Finite difference scheme is adopted to formulate the nonlinear multi-degree-of-freedom system about the random vibration of the beam.
G.-K. Er, V.P. Iu, H.-E. Du
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract Ring current modeling has been a subject of active research in the last two decades. However, accurately modeling of this population of particles remains a challenge. Several recent studies have demonstrated that ring current models can overestimate the trapped electron flux in the 10–50 keV range by up to two orders of magnitude during ...
Katja Stoll +5 more
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Are Directed Waves Multifractal?
, 1998 Wave propagation is studied in a sufficiently anisotropic random medium that backscattering along one direction can be neglected. A Fokker-Planck equation is derived the solution to which would provide a complete statistical description of such directed ...
A. A. Ovichinnikov +37 more
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Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.Abstract We present a novel data analysis technique based on physics‐informed neural networks (PINNs) to reconstruct two‐dimensional (2D) magnetohydrodynamic (MHD) and Hall MHD equilibria in a space plasma from in situ spacecraft measurements. Our method incorporates the steady‐state MHD or Hall MHD equations—a set of partial differential equations ...
Hiroshi Hasegawa +3 more
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How Well Can Solar Wind Parameters Predict Outer Radiation Belt Electron Flux?
Space Weather, Volume 24, Issue 4, April 2026.Abstract The electron flux in the outer radiation belt is primarily governed by interactions between the solar wind and magnetosphere. While geomagnetic indices are widely used for modeling and forecasting, their real‐time availability is limited. In contrast, solar wind parameters can be continuously monitored by a single satellite at the L1 ${L}_{1}$
Yutong Li, Mengli Tan, Xin Tao
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Onset of Fokker-Planck dynamics within a Closed Finite Spin System
, 2012 Relaxation according to Fokker-Planck equations is a standard scenario in classical statistical mechanics. It is however not obvious how such an equilibration may emerge within a closed, finite quantum system.
Gemmer, Jochen +2 more
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On the Mean‐Field Limit of Consensus‐Based Methods
Mathematical Methods in the Applied Sciences, Volume 49, Issue 5, Page 4214-4240, 30 March 2026.ABSTRACT Consensus‐based optimization (CBO) employs a swarm of particles evolving as a system of stochastic differential equations (SDEs). Recently, it has been adapted to yield a derivative free sampling method referred to as consensus‐based sampling (CBS). In this paper, we investigate the “mean‐field limit” of a class of consensus methods, including
Marvin Koß, Simon Weissmann, Jakob Zech
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Modeling the EMIC Wave‐Induced Acceleration of Energetic Protons in the Io Footprint Tail
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract The Io footprint tail (FPT) region is crucial for studying the interactions between Io and Jupiter's magnetosphere. In this region, Juno spacecraft observed significant acceleration of energetic protons, concurrently with electromagnetic ion cyclotron (EMIC) waves below the proton gyro‐frequency.
Peng Lu +6 more
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