Results 41 to 50 of about 683,959 (300)

Reversals of the solar magnetic dipole in the light of observational data and simple dynamo models

open access: yes, 2014
Observations show that the photospheric solar magnetic dipole usually does not vanish during the reversal of the solar magnetic field, which occurs in each solar cycle. In contrast, mean-field solar dynamo models predict that the dipole field does become
Hoeksema, J. T.   +3 more
core   +1 more source

Inter-hour direct normal irradiance forecast with multiple data types and time-series

open access: yesJournal of Modern Power Systems and Clean Energy, 2019
Boosted by a strong solar power market, the electricity grid is exposed to risk under an increasing share of fluctuant solar power. To increase the stability of the electricity grid, an accurate solar power forecast is needed to evaluate such ...
Tingting Zhu   +5 more
doaj   +1 more source

Quantifying the Effect of ICME Removal and Observation Age for in Situ Solar Wind Data Assimilation

open access: yesSpace Weather, 2022
Accurate space weather forecasting requires advanced knowledge of the solar wind conditions in near‐Earth space. Data assimilation (DA) combines model output and observations to find an optimum estimation of reality and has led to large advances in ...
Harriet Turner   +4 more
doaj   +1 more source

Fluctuations in the Alpha-Effect and Grand Solar Minima

open access: yes, 2013
Parameters of a special kind of \alpha-effect known in dynamo theory as the Babcock-Leighton mechanism are estimated using the data of sunspot catalogs. The estimates evidence the presence of the Babcock-Leighton \alpha-effect on the Sun. Fluctuations of
Choudhuri, A. R.   +2 more
core   +1 more source

Adaptable Tile‐Based Pneumatic Origami through Structurally Coupled Localized Actuation

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents tile‐based pneumatic origami structures with rigid tiles and flexible fabric creases, achieving adaptable properties including morphing shape, selective multistability, and tunable stiffness. Independently pressurized folding bladders at each crease enable structurally coupled localized actuation of origami structures.
Tiantian Li, Jonathan Luntz, Diann Brei
wiley   +1 more source

Development of a local empirical model of ionospheric total electron content (TEC) and its application for studying solar-ionospheric effects

open access: yesScientific Reports, 2021
Regular and irregular variations in total electron content (TEC) are one of the most significant observables in ionospheric studies. During the solar cycle 24, the variability of ionosphere is studied using global positioning system derived TEC at a mid ...
Pantea Davoudifar   +6 more
doaj   +1 more source

Nonlinear damping of slab modes and cosmic ray transport

open access: yes, 2007
By applying recent results for the slab correlation time scale onto cosmic ray scattering theory, we compute cosmic ray parallel mean free paths within the quasilinear limit. By employing these results onto charged particle transport in the solar system,
A. Lazarian   +27 more
core   +1 more source

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

open access: yesAdvanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu   +14 more
wiley   +1 more source

Effects of Temperature and Radiation on Yield of Spring Wheat at Different Latitudes

open access: yesAgriculture, 2022
It is of great importance to investigate spring wheat yield affected by the climate at different latitudes in the Rice-Wheat Rotation System. Two spring wheat varieties used as the study objects were planted at two locations of different latitudes in ...
Zhenzhen Zhang   +7 more
doaj   +1 more source

JPEG2000 Image Compression on Solar EUV Images [PDF]

open access: yes, 1996
For future solar missions as well as ground-based telescopes, efficient ways to return and process data have become increasingly important. Solar Orbiter, e.g., which is the next ESA/NASA mission to explore the Sun and the heliosphere, is a deep-space ...
Fischer, C. E.   +2 more
core   +3 more sources

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