Results 111 to 120 of about 6,168 (304)

Investigating the Efficacy of Topologically Derived Time Series for Flare Forecasting. I. Data Set Preparation

The Astrophysical Journal
The accurate forecasting of solar flares is considered a key goal within the solar physics and space weather communities. There is significant potential for flare prediction to be improved by incorporating topological fluxes of magnetogram data sets ...
Thomas Williams, Christopher B. Prior, David MacTaggart   +2 more
doaj   +1 more source

Dipole‐Manipulated Built‐In Electric Field Enables Ultrafast Charge Separation in Perylene Diimide Polymers for Photoelectrochemical Water Splitting

Advanced Science, EarlyView.
Molecular dipole engineering in dendritic perylene diimide polymers through nitrogen‐rich heterocyclic linkers amplifies the built‐in electric field, enabling sub‐picosecond charge separation and efficient multi‐electron accumulation. This structure–dynamics–performance relationship establishes a versatile design strategy for high‐performance organic ...
Ying‐Xin Qiao, Zicong Situ, Yi‐Jing Chen, Shuo‐Xiang Liu, Jing‐Lan Zhang, Xingqing Li, Luo‐Han Xie, Si‐Hang Xie, Qing‐Xiao Tong, Andong Xia, Zhuoran Kuang, Jing‐Xin Jian   +11 more
wiley   +1 more source

Application of a Grid-constrained U-shaped Neural Operator in Real-time Solar Corona Magnetic Field Extrapolation

The Astrophysical Journal Supplement Series
In this study, we propose a neural network framework, called the Grid-constrained U-shaped Neural Operator (GC-UNO), for real-time extrapolation of the coronal magnetic fields of active regions (ARs).
Hao Yang, Pingbing Zuo, Zhenhua Liu, Peng Zou, Chaowei Jiang, Zhengyang Zou, Yanshi Huang, Yi Wang, Kun Zhang, Ruize Zhang   +9 more
doaj   +1 more source

Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks

Advanced Science, EarlyView.
Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley   +1 more source

Formation and large-scale patterns of filament channels and filaments

, 2014
2015ASSL..415..355MThe properties and large-scale patterns of filament channels and filaments are considered. Initially, the global formation locations of filament channels and filaments are discussed, along with their hemispheric pattern.
Duncan H. Mackay, Mackay, Duncan Hendry
core   +1 more source

The Link between Nonthermal Velocity and Free Magnetic Energy in Solar Flares

The Astrophysical Journal Letters
The cause of excess spectral line broadening (nonthermal velocity) is not definitively known, but given its rise before and during flaring, the causal processes hold clues to understanding the triggers for the onset of reconnection and the release of ...
James McKevitt, Robert Jarolim, Sarah Matthews, Deborah Baker, Manuela Temmer, Astrid Veronig, Hamish Reid, Lucie Green   +7 more
doaj   +1 more source

Surface Fermi Level Modulation of Photoanode by Optimized Conducting Nanoparticle Heterointerfaces for Enhanced Photoelectrochemical Water Splitting

Advanced Science, EarlyView.
Optimizing the heterointerface coverage of the conducting Ni2P nanoparticles on the surface of BVO photoanode manipulates the surface Fermi‐level modulation, which significantly enhances photoelectrochemical oxygen evolution reaction. Our multiscale simulations and experimental results reveal that an optimal Ni2P coverage of 9.4% pins the surface Fermi
Phuong Thi Pham, Seulgi Ji, Unbeom Baeck, Yuankai Li, Duong Nguyen Nguyen, Won Tae Hong, Yang You, John Moraros, Kyoungsuk Jin, Jun Young Lee, Chan‐Hwa Chung, Tae‐Hoon Kim, Jongwook Park, Heechae Choi, Jung Kyu Kim   +14 more
wiley   +1 more source

A Grid-constrained Fourier Neural Operator for Magnetic Field Extrapolation of the Solar Corona

The Astrophysical Journal
In this study, we propose a hybrid architecture for coronal magnetic field extrapolation modeling. This architecture integrates Fourier neural operators (FNOs) with grid-based finite-difference methods used to impose physical constraints and is named ...
Hao Yang, Zhenhua Liu, Pingbing Zuo, Peng Zou, Ruize Zhang, Yanshi Huang   +5 more
doaj   +1 more source

Lifetime of Long-Lived Sunspot Groups

Universe
Studies of active region (AR) lifetimes are mostly restricted to short-lived ARs. The aim of this paper is to include recurrent ARs, which should be identified unambiguously.
Judit Muraközy
doaj   +1 more source

Tailoring Multifunctional Carbon Dots via Precursor Stoichiometry: Switching Between Solid‐State Fluorescence and Broadband Absorption Through Aggregation Control

Advanced Science, EarlyView.
Precursor stoichiometry programs the surface chemistry of carbon dots, directing their self‐assembly into distinct aggregation modes. Aldehyde‐enriched surfaces form ordered, hydrogen‐bonded assemblies that enable bright red solid‐state fluorescence, whereas amine‐rich surfaces promote compact π–π stacked aggregates with broadband visible‐light ...
Gaixia Yang, Hao Sun, Defa Hou, Fulin Yang, Yuan Zou, Bei Zhou, Lanxiang Liu, Xu Lin, Guanben Du   +8 more
wiley   +1 more source