Results 71 to 80 of about 1,589,837 (361)
The Astrophysical JournalWe examined solar photospheric magnetic fields for the solar cycles 21–25, covering the period 1975–2024. The unsigned photospheric magnetic fields at low latitudes (0°–45°), known as solar toroidal fields, showed a solar cycle variation with the total ...
Harsha Avinash Tanti +3 more
doaj +1 more source
The Astrophysical Journal, 2023 Much of the research on the magnetic activity of the Sun has been focused on its axisymmetric component. However, the longitudinal complexity plays a fundamental role in the solar magnetic activity.
Breno Raphaldini +2 more
doaj +1 more source
Long-term variations of solar magnetic fields derived from geomagnetic data [PDF]
, 2013 Sunspots are dark spots on the solar surface associated with strong magnetic fields. The number, area, and brightness of sunspots are supposed to reflect the intensity of the solar magnetic fields and are often used as proxies for their long-term variations.
arxiv +1 more source
Interfacial Interaction‐Mediated Regulation of Metal Oxidation States for Enhanced CO2 Reduction
Advanced Functional Materials, EarlyView.A hybrid strategy is employed to optimize bismuth–oxygen interactions, precisely regulating interfacial bismuth–oxygen bonds during topochemical synthesis. This leads to vanadium oxynitride‐bismuth catalyst exhibiting high Faradaic efficiency and durability for formate production, attributed to enhanced reaction thermodynamics and kinetics.
Zhongyuan Ma +6 more
wiley +1 more source
The Astrophysical JournalMagnetic reconnection is believed to play an important role in the release and conversion of energy among magnetized plasma systems. So far, we have been unable to understand under what conditions magnetic reconnection can take place.
Tao Ding +5 more
doaj +1 more source
A New Method Linking the Solar Wind Speed to the Coronal Magnetic Field
The Astrophysical Journal, 2023 The release and acceleration of the solar wind is still an outstanding question. There are several aspects related to this phenomenon that still need to be investigated, and one of these is the identification of the region within the inner corona where ...
Marta Casti +4 more
doaj +1 more source
Structure and Evolution of Magnetic Fields Associated with Solar Eruptions (Invited Review) [PDF]
, 2014 This paper reviews the studies of solar photospheric magnetic field evolution in active regions and its relationship to solar flares. It is divided into two topics, the magnetic structure and evolution leading to solar eruptions and the rapid changes of photospheric magnetic field associated with eruptions. For the first topic, we describe the magnetic
arxiv +1 more source
Sono‐Piezo‐Photosynthesis of Ethylene and Acetylene from Bioethanol under Ambient Conditions
Advanced Functional Materials, EarlyView.A novel sono‐piezo‐photocatalytic strategy enables the conversion of bioethanol to ethylene (C2H4) and acetylene (C2H2) under ambient conditions, addressing the limitations of conventional methods that are high‐temperature and energy‐intensive. By using an advanced graphene oxide/sodium bismuth titanate heterostructure catalyst, this work achieved ...
Yue Jiang +21 more
wiley +1 more source
Preliminary Discussion on the Current Sheet
The Astrophysical JournalThe current sheet is a characteristic structure of magnetic energy dissipation during the magnetic reconnection process. So far, the width and depth of the current sheet are still indefinite.
Tao Ding +3 more
doaj +1 more source
Solar magnetic fields and the cause of terrestrial magnetism [PDF]
Terrestrial Magnetism and Atmospheric Electricity, 1908 In this JOURNAL for June, 1900 (vol. V, p. 73), June, 1903 (vol. VIII, p. 49) and December, 1904 (vol. IX, p. 167), the Earth's magnetism was traced to rotation round the axis, different hypotheses for a differential effect resulting from the two kinds of electricity being discussed in each of the three papers.
openaire +2 more sources