Results 51 to 60 of about 1,402,263 (290)

On the solar rotation and activity [PDF]

Astronomische Nachrichten, 2007
AbstractThe interaction between differential rotation and magnetic fields in the solar convection zone was recently modelled by Brun (2004). One consequence of that model is that the Maxwell stresses can oppose the Reynolds stresses, and thus contribute to the transport of the angular momentum towards the solar poles, leading to a reduced differential ...
Brajša, Roman, Wohl, H., Ruždjak, Domagoj, Vršnak, Bojan, Verbanac, Giuliana, Svalgaard, L., Hochedez, J.-F.   +6 more
openaire   +3 more sources

Phase Engineering of Atomically Precise Nanoclusters (APNCs) of Gold and Beyond

Advanced Materials, EarlyView.
Engineering the structural phase of materials is of paramount importance for both fundamental research and practical applications. In this Review, we summarize the recent progress in controlling the phases of atomically precise nanoclusters (APNCs) of gold, silver and copper, as well as bimetallic systems. The phase‐enabled material properties of APNCs
Yitong Wang, Avirup Sardar, Weijie Ji, Zhongyu Liu, Rongchao Jin   +4 more
wiley   +1 more source

Dynamic 3D Simulation of Surface Charging on Rotating Asteroids

The Astrophysical Journal
The surface-charging phenomenon of asteroids, mainly resulting from solar wind plasma and solar radiation, has been extensively studied. However, the influence of the asteroid’s rotation on surface charging is not yet fully understood.
Ronghui Quan, Zhiying Song, Zhigui Liu
doaj   +1 more source

Spectral analysis of auroral geomagnetic activity during various solar cycles between 1960 and 2014 [PDF]

Annales Geophysicae, 2016
In this paper we use wavelets and Lomb–Scargle spectral analysis techniques to investigate the changing pattern of the different harmonics of the 27-day solar rotation period of the AE (auroral electrojet) index during various phases of different ...
P. B. Kotzé
doaj   +1 more source

Generating Unconventional Spin‐Orbit Torques With Patterned Phase Gradients in Tungsten Thin Films

Advanced Materials, EarlyView.
ABSTRACT A key aim in spintronics is to achieve current‐induced magnetization switching via spin‐orbit torques without external magnetic fields. For this, the focus of recent work has been on introducing controlled lateral gradients across ferromagnet/heavy‐metal devices, giving variations in thickness, composition, or interface quality.
Lauren J. Riddiford, Anne Flechsig, Shilei Ding, Emir Karadža, Niklas Kercher, Tobias Goldenberger, Elisabeth Müller, Pietro Gambardella, Laura J. Heyderman, Aleš Hrabec   +9 more
wiley   +1 more source

Study on the Temporal Evolution of the Radial Differential Rotation of Solar Corona Using Radio Emissions

The Astrophysical Journal
The daily measurements of the disk-integrated solar radio flux, observed by the Radio Solar Telescope Network, at 245, 410, 610, 1415, 2695, 4995, and 8800 MHz during the time interval of 1989 January 1 to 2019 December 17, are used to investigate the ...
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, Y. J. Wang, X. W. Tan   +5 more
doaj   +1 more source

Heat Transfer Analysis and Modeling for a Coaxial Solar Collector in a Domestic Cogeneration System

, 2011
The need for an efficient energy system in domestic houses push the research toward innovative cogeneration system, which can meets the needs for electricity, heating and cooling power.
Alberto Bertaso, Alberti, Fabrizio, Crema, Luigi, Bertaso, Alberto, Luig Crema, Fabrizio Alberti   +5 more
core   +1 more source

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

III. Solar Rotation [PDF]

Transactions of the International Astronomical Union, 1985
The study of solar rotation using the Doppler effect in solar spectrum lines continues to be an active and fruitful area of research. Duvall (1982) has confirmed a slower rotation rate for the photosphere than for sunspots, which bears on an earlier controversy regarding this point between the Stanford Solar Observatory and some other observatories ...
openaire   +1 more source

Gossamer roadmap technology reference study for a solar polar mission [PDF]

, 2013
A technology reference study for a solar polar mission is presented. The study uses novel analytical methods to quantify the mission design space including the required sail performance to achieve a given solar polar observation angle within a given ...
Finsterle, W, Seboldt W., Ruedeger Reinhard, W. Seboldt, G. Mengali, Solanki, S. K., Finsterle W., Appourchaux, T., McGrath C., Dachwald, Bernd (Prof. Dr.-Ing.), McGrath, C., C. R. McInnes, McInnes, C.R., McInnes C. R., M. Macdonald, T. Appourchaux, McInnes C., Seboldt, Wolfgang, Sekii T., McInnes, Colin, C. McGrath, Reinhard R., Wimmer Schweingruber R., Wimmer-Schweingruber, R. F., Sekii, T., Velli, M., Liewer, P.C., L. Gizon, Appourchaux, T, Velli, M, P. C. Liewer, Seboldt, W., Wimmer-Schweingruber, R.F., Wimmer Schweingruber R. F., W. Finsterle, McGrath, Ciara, Gizon, L, Macdonald, M., McInnes, Colin R., Solanki S., Velli M., Sekii, T, S. K. Solanki, Peter Spietz, M. Velli, Liewer, P. C., T. Sekii, Gizon L., Liewer P., B. Dachwald, Finsterle, W., Appourchaux T., Mengali, Giovanni, Mengali, G., Liewer P. C., Dachwald B., Spietz, Peter, Spietz P., McGrath, Ciara; id_orcid, Solanki, S.K., Dachwald, B., R. F. Wimmer-Schweingruber, Macdonald, Malcolm, Macdonald M., Reinhard, Ruedeger, Gizon, L.   +65 more
core   +1 more source