Results 131 to 140 of about 2,843,165 (290)
The solar wind heavy ion composition in the ascending phases of the solar cycles 23 and 25
Frontiers in Astronomy and Space SciencesThe approximately 11-year solar cycle has been shown to impact the heavy ion composition of the solar wind, even when accounting for streams of differing speeds; however, the heavy ion composition observed between the same specific phases of a past solar
D. T. Carpenter +8 more
doaj +1 more source
, 2006 In life cycle assessment (LCA) of solar PV systems, energy pay back time (EPBT) is the commonly used indicator to justify its primary energy use. However, EPBT is a function of competing energy sources with which electricity from solar PV is compared ...
Osman, Ramli +9 more
core +1 more source
Advanced Materials, EarlyView.Our work introduces a new framework that fundamentally changes how orientation in bismuth oxyhalide systems is approached. Comprehensive experiments, backed by theoretical models, reveal the pivotal role of halide anions to modify the van der Waals stacking energies required to direct orientation. Our method enables the fabrication of near perfect (001)
Gabriel Aygur +10 more
wiley +1 more source
A New Declining Phase Precursor and an Early Prediction of Cycle 26 Maximum
The Astrophysical JournalThe overall level of solar activity as seen in the sunspot number (SSN) record paces both the state of the ionosphere and the amplitude and occurrence rates of extreme space weather events.
S. C. Chapman
doaj +1 more source
Global solar photospheric and coronal magnetic field over activity cycles 21–25
Journal of Space Weather and Space ClimateThe evolution of the global solar magnetic field from the beginning of cycle 21 (mid-1970s) until the currently-ascending cycle 25 is described using photospheric full-disk and synoptic magnetograms from NSO Kitt Peak Vacuum Telescope (KPVT) 512-channel ...
Petrie Gordon J. D.
doaj +1 more source
Life cycle assessment of solar chimneys [PDF]
, 2013 Climate change is increasingly becoming a significant issue globally and the use of solar thermal technology is one approach in managing the world’s environment.
Mbohwa, Charles. +4 more
core
Advanced Materials, EarlyView.Alkoxy chain length drives a continuous transition from eclipsed AA to a serrated, slipped AA* configuration over Co‐porphyrin COFs. A moderate slip both contracts the pore channel to enrich CO2 and suppress hydrogen evolution, and enhances collective high‐spin of Co sites, which delivers a record CO production rate with high selectivity.
Jie He +8 more
wiley +1 more source
Which Solar Latitude Follows the Sunspot Cycle Exactly?
The Astrophysical Journal LettersThe large-scale convection in the Sun known as supergranulation is manifested as a network structure on the solar surface. The network cells have an average lifetime of 24 hr, a size of about 30 Mm, and a lane width of about 6 Mm.
K. P. Raju
doaj +1 more source
Advanced Materials, EarlyView.A hierarchical flexible ceramic nanofiber membrane integrates a La‐stabilized ZrO2 scaffold with superhydrophobic UiO‐66‐NH2/CdS heterojunctions. The gas–liquid–solid interfacial architecture sustains vapor‐selective desalination, visible‐light charge separation, and rapid H2 extraction, enabling simultaneous freshwater production and photocatalytic ...
Pengfei Lin +9 more
wiley +1 more source
The Occurrence of Powerful Flares Stronger than X10 Class in Solar Cycles
The Astrophysical Journal LettersSolar flares stronger than X10 (S-flares, >X10) are the highest-class flares that significantly impact on the Sun's evolution and space weather. Based on observations of Geostationary Orbiting Environmental Satellites at soft X-ray wavelength and the ...
Baolin Tan +3 more
doaj +1 more source