Results 61 to 70 of about 650,857 (339)

Multi‐Technique Study of the Thermospheric Wind Responses to the November 3–4, 2021 Storm

open access: yesSpace Weather
The responses of thermospheric winds at mid and low latitudes to the intense geomagnetic storm of November 3–4, 2021, are examined using multi‐technique observations and simulations with the Thermosphere Ionosphere Electrodynamics General Circulation ...
Xinmiao Xia   +7 more
doaj   +1 more source

Research on Removing Thin Cloud Interference in Solar Flare Monitoring with SMAT-Configured Telescopes

open access: yesUniverse
The precise monitoring of solar flares holds significant scientific value for space mission safety, communication security, and space environment forecasting.
Hongyan Li   +3 more
doaj   +1 more source

The correlation between solar and geomagnetic activity – Part 1: Two-term decomposition of geomagnetic activity [PDF]

open access: yesAnnales Geophysicae, 2011
By analyzing the logarithmic relationship between geomagnetic activity as represented by the annual aa index and solar magnetic field activity as represented by the annual sunspot number (Rz) during the period 1844–2010, aa is shown to lie in between
Z. L. Du
doaj   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

open access: yesAdvanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song   +4 more
wiley   +1 more source

A semi-empirical approach to simulating the Dst index in global MHD models of Earth’s magnetosphere

open access: yesEarth and Planetary Physics
The Dst index has been commonly used to measure the geomagnetic effectiveness of magnetic storm events for several decades. Based on Burton’s empirical Dst model and the global magneto-hydrodynamic (MHD) simulation of Earth’s magnetosphere, here we ...
JiaWen Yue   +3 more
doaj   +1 more source

Level and length of cyclic solar activity during the Maunder minimum as deduced from the active day statistics

open access: yes, 2015
The Maunder minimum (MM) of greatly reduced solar activity took place in 1645-1715, but the exact level of sunspot activity is uncertain as based, to a large extent, on historical generic statements of the absence of spots on the Sun.
Carrasco, V. M. S.   +4 more
core   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

open access: yesAdvanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan   +9 more
wiley   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

Solar Activity and Energy [PDF]

open access: yes
By performing various activities to model the magnetic fields around the sun, students will gain an understanding of how the restructuring of these magnetic fields can cause a variety of seemingly unrelated shapes and phenomena.

core   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida   +16 more
wiley   +1 more source

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