Results 91 to 100 of about 71,920 (208)

The solar dynamo [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
The origins of solar magnetism lie below the visible surface of the Sun, in the highly turbulent convection zone. Turbulent convection operates in conjunction with rotational shear, global circulations and intricate boundary layers to produce the rich diversity of magnetic activity we observe.
openaire   +2 more sources

Modulation of the Mid‐Latitude Ionospheric Sporadic E Layer by the Northern Polar Vortex

open access: yesGeophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The sporadic E (Es) layer is a prominent ionospheric irregularity mainly driven by vertical wind shear at mid‐latitudes. Hereby we statistically investigate for the first time Es responses to variations of the northern polar vortex (represented by NAM index) using long‐term ionosonde observations over Japan (44 years) and Australia (34 years).
Tomoki Maeda   +3 more
wiley   +1 more source

Role of soft-iron impellers on the mode selection in the VKS dynamo experiment

open access: yes, 2010
A crucial point for the understanding of the von-K\'arm\'an-Sodium (VKS) dynamo experiment is the influence of soft-iron impellers. We present numerical simulations of a VKS-like dynamo with a localized permeability distribution that resembles the shape ...
A. Giesecke   +4 more
core   +1 more source

How Does the Magnetosphere‐Ionosphere Current System Respond to Solar Flares?

open access: yesGeophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract While the isolated effects of solar flares on low‐latitude ionospheric electrodynamics have been well documented, the coupled system response of the equatorial electrojet (EEJ), auroral electrojet (AEJ), field‐aligned currents (FACs), and asymmetric ring current (ASY‐H) remains poorly understood.
Hongkai Tang   +5 more
wiley   +1 more source

HOCKEY PLAYERS COORDINATION ABILITIES CONTROL

open access: yesВестник Кемеровского государственного университета, 2015
The research was aimed to: make a selection of hockey tests; define their specificity; perform an experimental trial of the selected tests at CHL-level players; design the score sheets for each test. 20 professional Continental Hockey League players were
V. E. Zankovets, V. P. Popov
doaj  

Quasi-biennial oscillations and Rieger-type periodicities in a Babcock–Leighton solar dynamo

open access: yesAstronomy & Astrophysics
Context. The Sun’s magnetic field exhibits the 11 year solar cycle as well as shorter periodicities, popularly known as the quasi-biennial oscillations (QBOs) and Rieger-type periods.
Kumar Pawan   +3 more
doaj   +1 more source

Investigating variation of latitudinal stellar spot rotation and its relation to the real stellar surface rotation

open access: yes, 2011
In this work the latitude dependent stellar spot rotation is investigated based on dynamo models. The maps of the magnetic pressure at the surface from the dynamo calculations are treated similarly to the temperature maps obtained using Doppler imaging ...
Elstner, D., Korhonen, H.
core   +1 more source

Sound Velocities of FeO‐Bearing Ringwoodite and Majorite: Implication for Martian Mantle Seismic Profiles

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Compressional and shear wave velocities (Vp, Vs) of candidate Martian deep‐mantle minerals, FeO‐rich ringwoodite ((Mg0.66Fe0.34)2SiO4) and majorite (Mg0.75Fe0.10Al0.26Ca0.07Si0.84O3), were measured up to 25 GPa and 700 K using Brillouin light scattering coupled with externally‐heated diamond anvil cells.
Luo Li   +6 more
wiley   +1 more source

STRUCTURE OF COMPETITIVE ACTIVITY AND THE LEVEL OF SPECIAL ENDURANCE IN PROFESSIONAL HOCKEY ASSESSMENT

open access: yesВестник Кемеровского государственного университета, 2015
The paper presents the most popular tools of pedagogical control used in sport, and in hockey in particular. The paper analyzes: the motor activity of players during competitions; the contribution of different metabolic sources providing players ...
V. E. Zankovets, V. P. Popov
doaj  

Topside Ionospheric Ambipolar Diffusion Derived From ICON Observations

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract The scarcity of ambipolar diffusion observations has constrained our understanding of ionospheric physical processes. We present the first comprehensive analysis of topside ionospheric ambipolar diffusion using the difference between the field‐aligned ion drifts and neutral winds observed by the Ionospheric Connection Explorer (ICON) satellite.
Rongjin Du   +8 more
wiley   +1 more source

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