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In the framework of a bimetric model, we discuss a relation between the (modified) Friedmann equations and a mechanical system similar to the quantum Hall effect problem. Firstly, we show how these modified Friedmann equations are mapped to…

高能物理 - 理论 · 物理学 2018-09-26 H. Falomir , J. Gamboa , P. Gondolo , F. Mendez

Here is reported in situ observation of energetic electrons (~100-500 keV) associated with magnetic reconnection in the solar wind by the ACE and Wind spacecraft. The properties of this magnetic cloud driving reconnection and the associated…

空间物理 · 物理学 2012-06-26 Y. Wang , F. S. Wei , X. S. Feng , S. H. Zhang , P. B. Zuo , T. R. Sun

The study investigates the effects of R. solani inoculation on the germination and early development of Lactuca sativa L. seeds using a low-cost, image-based monitoring system. Multiple cameras were deployed to continuously capture images…

计算机视觉与模式识别 · 计算机科学 2025-10-08 M. Torrente , A. Follador , A. Calcante , P. Casati , R. Oberti

Background: Salinity is one of the major abiotic stresses affecting plant production in arid and semi-arid regions. It causes reduction of cultivable area and combined with other factors, presents a serious threat to food stability in these…

组织与器官 · 定量生物学 2017-11-23 Khalil Cherifi , Abdelmjid Anagri , El Houssine Boufous , Abelhamid El Mousadik

We investigate generation processes of magnetic fields around first stars. Since the first stars are expected to form anisotropic ionization fronts in the surrounding clumpy media, magnetic fields are generated by effects of radiation force…

宇宙学与河外天体物理 · 物理学 2015-05-30 Kentaro Doi , Hajime Susa

The application of nonthermal plasma in agriculture has emerged as a sustainable and eco-friendly method to enhance seed vigor, germination, and crop productivity. This study investigates the effects of atmospheric pressure plasma treatment…

等离子体物理 · 物理学 2026-01-22 Punit Kumar , Abhishek Kumar Singh , Priti Saxena

Electro magnetic transition form factors for the excitation of the Delta33-resonance are evaluated in the Skyrme model. They crucially rely on rotationally induced deformations of the hedgehog soliton which are suppressed by two N_C-orders…

高能物理 - 唯象学 · 物理学 2008-11-26 H. Walliser , G. Holzwarth

Origin of the magnetic field ubiquitous in the Universe is studied based on the Biermann mechanism, which is expected to work in the non-barotropic region. We perform a series of two-dimensional MHD simulations of the first generation…

宇宙学与河外天体物理 · 物理学 2010-11-17 Hidekazu Hanayama , Keitaro Takahashi , Kohji Tomisaka

The role of diffuse photospheric magnetic elements in the energy budget of the upper layers of the Sun's atmosphere has been the recent subject of many studies. This was made possible by the availability of high temporal and spatial…

太阳与恒星天体物理 · 物理学 2014-10-01 M. Stangalini , G. Consolini , F. Berrilli , P. De Michelis , R. Tozzi

We analyze the effects of the background velocity and the initial magnetic field correlations, and viscosities on the turbulent dynamo and the \alpha-effect. We calculate the \alpha-coefficients for arbitrary magnetic and fluid viscosities,…

统计力学 · 物理学 2009-11-10 Abhik Basu

We examine magnetogenesis in a multi-fluid environment. We find that the various composition of a modified Chaplygin Gas (MCG) and Plasma Fluid (PF) yield magnetic fields of non-negligible strengths. These fields are produced by the battery…

宇宙学与河外天体物理 · 物理学 2015-02-24 Patrick Adams , Bob Osano

The generation of primordial magnetic seed fields during inflation is studied in a theory derived from the one-loop vacuum polarization effective action of the photon in a curved background. This includes terms which couple the curvature to…

宇宙学与河外天体物理 · 物理学 2010-04-06 Kerstin E. Kunze

We image the field enhancement at Ag nanostructures using femtosecond laser pulses with a center wavelength of 1.55 micrometer. Imaging is based on non-linear photoemission observed in a photoemission electron microscope (PEEM). The images…

介观与纳米尺度物理 · 物理学 2015-03-09 Erik Mårsell , Esben W. Larsen , Cord L. Arnold , Hongxing Xu , Johan Mauritsson , Anders Mikkelsen

Given its vast application on online social networks, Influence Maximization (IM) has garnered considerable attention over the last couple of decades. Due to the intricacy of IM, most current research concentrates on estimating the…

社会与信息网络 · 计算机科学 2023-04-14 Zonghan Zhang , Zhiqian Chen

Wild populations of Medicago ciliaris and Medicago polymorpha were subjected to four salt treatments 0, 50, 100 and 150 mM NaCl, plant growth and proline concentration in leaves were assessed. The analyzed data revealed significant…

定量方法 · 定量生物学 2016-09-26 Khalil Cherifi , Abdelmajid Haddioui , Mohammed El Hansali , El Houssein Boufous

Magnetic fields play a very important role in the evolution of galaxies through their direct impact on star formation and stellar feedback-induced turbulence. However, their co-evolution with these processes has still not been thoroughly…

星系天体物理 · 物理学 2018-11-14 Evangelia Ntormousi

This study based on longitudinal Zeeman effect magnetograms and spectral line scans investigates the dependence of solar surface magnetic fields on the spectral line used and the way the line is sampled in order to estimate the magnetic…

天体物理学 · 物理学 2009-11-13 R. K. Ulrich , L. Bertello , J. E. Boyden , L. Webster

$PSP$ and $SolO$ data are utilized to investigate magnetic field intermittency in the solar wind (SW). Small-scale intermittency $(20-100d_{i})$ is observed to radially strengthen when methods relying on higher-order moments are considered…

We investigate the evolution of magnetic fields in galaxy clusters starting from constant primordial fields using highly resolved ($\approx \rm 4 ~kpc$) cosmological MHD simulations. The magnetic fields in our sample exhibit amplification…

宇宙学与河外天体物理 · 物理学 2019-03-27 Paola Domínguez-Fernández , Franco Vazza , Marcus Brüggen , Gianfranco Brunetti

In large gradual solar energetic particle (SEP) events, especially the ground-level enhancement (GLE) events, where and how energetic particles are accelerated is still a problem. By using imaging data from TRACE, Yohkoh/HXT, SOHO/MDI and…

天体物理学 · 物理学 2008-11-26 C. Li , Y. H. Tang , Y. Dai , W. G. Zong , C. Fang