Results 51 to 60 of about 7,080,768 (301)

Climate - How unusual is today's solar activity? [PDF]

, 2005
To put global warming into context requires knowledge about past changes in solar activity and the role of the Sun in climate change. Solanki et al.1 propose that solar activity during recent decades was exceptionally high compared with that over the ...
Joos, F, Fortunat Joos, Raimund Muscheler, Snowball, Ian, Müller, Simon A., Ian Snowball, Joos, Fortunat, Simon A. Müller, Muscheler, Raimund, Muller, S A, Muscheler, R   +10 more
core   +1 more source

Halide Composition Controls Phase Morphology and Device Specific Performance in Perovskite Photovoltaics and Light Emitting Diodes

Advanced Functional Materials, EarlyView.
We demonstrate that halide composition determines phase morphology, governing distinct operating mechanisms in mixed halide perovskites. Phase segregating 75% Br compositions enhance solar cell performance, whereas intrinsically phase‐separated 95% Br compositions provide stable light emitting diodes.
Tal Binyamin, Stav Rahmany, Anat Shvets, Hadar Shema, Elad Gross, Ido Hadar, Lioz Etgar   +6 more
wiley   +1 more source

Evaluating Whole-Sky Cloud Segmentation Against an Operating Solar Station: The CLOUD99 Dataset and Protocol

Universe
Ground-based whole-sky imagers provide cloud cover data to determine solar observing conditions. Deep segmentation models exceed 0.87 mean intersection-over-union (IoU, shared area over union) on public benchmarks, but need not transfer to an operating ...
Hui Wang, Jiaben Lin, Mingfu Shao, Liyue Tong, Chen Yang, Yin Zhang, Yuyang Li   +6 more
doaj   +1 more source

Designing photovolaic/thermal solar collectors for building integration [PDF]

, 2008
With concern growing over the environment and resource use, there has been greater emphasis placed on sustainability, particularly in the built environment.
Carson, James K., Duke, Mike, Anderson, Timothy Nicholas   +2 more
core  

High‐Performance, Air‐Stable and Eco‐Friendly Terpene‐Processed Organic Solar Cells via Solvent‐Composition‐Controlled Film Formation Kinetics

Advanced Functional Materials, EarlyView.
Solvent‐composition‐controlled film formation enables high‐performance (efficiency = 18.66%) and air‐stable terpene‐processed organic solar cells. An optimized eucalyptol/tetralin ratio of 50:50 (v/v) balances molecular solvation and aggregation kinetics, producing favorable nanoscale phase separation and vertical composition gradients.
Hyerin Jeon, Seungho Lee, Jinseck Kim, Jin‐Woo Lee, Bumjoon J. Kim   +4 more
wiley   +1 more source

Statistical investigation of large geomagnetically induced current disturbance events: relationships with geomagnetic storms and interplanetary sources

Frontiers in Astronomy and Space Sciences
IntroductionGeomagnetically induced currents (GICs) pose a critical space weather hazard to ground-based conductive infrastructure. Previous studies have commonly identified large GIC events using daily maximum amplitudes exceeding 10 A, a criterion that
Wenjin Zhao, Jiayun Wei, Pingbing Zuo, Boyi Wang, Zhengyang Zou, Hao Yang, Yongxu Yan, Siyuan Wang, Kefan Chen   +8 more
doaj   +1 more source

Ligand Assisted Epitaxial Growth of CsPbBr3 Microcrystal Resonators With Record ‐Low Lasing Thresholds

Advanced Functional Materials, EarlyView.
Solution‐based ligand‐assisted epitaxial growth (LAEG) yields high‐quality CsPbBr3 microcrystals on different substrates with superior morphology, passivated surfaces, and high photoluminescence quantum yield. These robust micro‐resonators achieve record‐low room‐temperature lasing thresholds of 7.2 kW·cm−2 and maintain operational stability up to 90 ...
Shuyu Zhou, Viktor Rehm, Zijian Peng, Tomáš Hrbek, Anastasia Barabash, Christoph J. Brabec, Berke Özyalin, Yufei Han, Johannes Böhmer, Johannes Will, Erdmann Spiecker, Klaus Götz, Tobias Unruh, Jędrzej Korczak, Tomasz Story, Felix Hilpert, Olaf Brummel, Jörg Libuda, Iva Matolínová, Wolfgang Heiss   +19 more
wiley   +1 more source

Review of recent observations of magnetic holes in the solar wind

Discover Space
Magnetic holes (MHs) are ubiquitous coherent structures within the solar wind, defined by localized depressions in the magnetic field. They are increasingly recognized as fundamental sites of energy conversion and particle energization, playing a crucial
C. Y. Li, Y. Wang, F. S. Wei, X. S. Feng, Z. K. Xu, Y. X. Lu, B. Y. Wang, P. B. Zuo, C. W. Jiang, X. J. Xu, Z. L. Zhou   +10 more
doaj   +1 more source

A brief history of Regional Warning Center China (RWC-China) [PDF]

History of Geo- and Space Sciences, 2018
Solar-terrestrial prediction services in China began in 1969 at the Beijing Astronomical Observatory (BAO), Chinese Academy of Sciences (CAS). In 1990, BAO joined the International URSIgram and World Days Service (IUWDS) and started solar-terrestrial ...
H. He, H. He, H. He, H. Wang, H. Wang, H. Wang, Z. Du, Z. Du, Z. Du, X. Huang, X. Huang, Y. Yan, Y. Yan, X. Dai, X. Dai, J. Guo, J. Guo, J. Wang, J. Wang   +18 more
doaj   +1 more source

Reaction‐Time pH Stabilization by Poly(acrylic acid) with Ethanol‐Mediated Growth Control for Efficient Hydrothermal Sb2(S,Se)3 Solar Cells

Advanced Functional Materials, EarlyView.
Poly(acrylic acid) acts as a reaction‐time pH buffer during hydrothermal Sb2(S,Se)3 growth through its COOH/COO‐ equilibrium. When combined with ethanol‐regulated growth, this buffering strategy reduces Sb‐O related surface disorder, improves local electronic uniformity and carrier collection, and increases the champion solar‐cell efficiency to 10.25%,
Juhee Lee, Geumha Lim, Wookyung Jeon, Seongju Park, Jinwoo Chu, Yohan Yoon, William Jo, Byungha Shin   +7 more
wiley   +1 more source