Results 131 to 140 of about 54,891 (314)

Transition from axi- to nonaxisymmetric dynamo modes in spherical convection models of solar-like stars [PDF]

, 2018
Context. Both dynamo theory and observations of stellar large-scale magnetic fields suggest a change from nearly axisymmetric configurations at solar rotation rates to nonaxisymmetric configurations for rapid rotation. Aims.
Cole-Kodikara, E., J. J. Lehtinen, Brandenburg, Axel,, Olspert, N., Lehtinen, J. J.,, Viviani, Mariangela, Lehtinen, Jyri J., Lehtinen, J. J., Warnecke, J., M. Viviani, Käpylä, P. J., Viviani, M.,, Käpylä, M., Warnecke, J.,, Käpylä, Petri J.,, Olspert, Nigul, Cole-Kodikara, E. M., Kaepylae, P. J.,, Lehtinen, J., M. J. Käpylä, Cole-Kodikara, Elizabeth M., Käpylä, Maarit J., Brandenburg, A., Cole-Kodikara, E. M.,, A. Brandenburg, Viviani, M., Olspert, N.,, E. M. Cole-Kodikara, Käpylä, P., Käpylä, P. J.,, Brandenburg, Axel, P. J. Käpylä, Käpylä, Petri J., Warnecke, Jörn, Käpylä, M. J., J. Warnecke, N. Olspert   +36 more
core   +1 more source

Classifying ground-measured 1 minute temporal variability within hourly intervals for direct normal irradiances

Meteorologische Zeitschrift, 2018
Variability of solar surface irradiances in the 1 minute range is of interest especially for solar energy applications. Eight variability classes are defined for the 1 minute resolved direct normal irradiance (DNI) variability inside an hour.
Marion Schroedter-Homscheidt, Miriam Kosmale, Sandra Jung, Jan Kleissl   +3 more
doaj   +1 more source

Co1/Ru Single‐Atom Alloy Catalyst for Sustainable Polypropylene Hydrogenolysis to Long‐Chain Liquid Products

Advanced Materials, EarlyView.
A titania‐supported Co1/Ru single‐atom alloy catalyst enables efficient polypropylene hydrogenolysis. Ru─Co─Ru motifs maintain Ru activity while suppressing excessive chain scission to gaseous products. Both virgin and waste plastics achieve high, environmentally and economically optimal C11+ liquid yields, supporting sustainable chemical recycling ...
Yuzhen Ge, Yimeng Jin, Alexandra Krestnikova, Sibei Zou, Antonio J. Martín, Gonzalo Guillén‐Gosálbez, Javier Pérez‐Ramírez   +6 more
wiley   +1 more source

Linker‐Engineered Dimeric Acceptors Afford Efficient Organic Photocatalytic Hydrogen Evolution via Tailored Nanomorphology for Long‐Lived Charge Accumulation

Advanced Materials, EarlyView.
We developed a new series of monomeric (MY) and dimeric acceptors incorporating unfused (DY1) and fused (DY2) linkers, which establish a controlled self‐aggregation trend of MY > DY2 > DY1. The DY2‐based system yields a bulk‐heterojunction nanoparticle morphology that appears to balance phase separation and interfacial accessibility, consistent with ...
Jin‐Woo Lee, Cheng Sun, Yang Song, Guanru Dong, Keren Ai, Stanley Alfred Cazaly, Flurin Eisner, Bumjoon J. Kim, Zeinab Hamid, Iain McCulloch, Yun‐Hi Kim, James R. Durrant   +11 more
wiley   +1 more source

Long-term climate variations and solar effects

, 2003
The cosmogenic radionuclides 14C, 10Be and 36Cl allow us to trace solar variability several tens of millennia back in time. Different methods of reconstructing past solar variability based on radionuclide concentrations measured in ice cores will be ...
Beer, Jurg, Muscheler, Raimund,, Lund University., Kromer, Bernd   +3 more
core  

Understanding the Variability of Helium Abundance in the Solar Corona Using Three-fluid Modeling and Ultraviolet Observations

The Astrophysical Journal Letters
The variability of helium abundance in the solar corona and the solar wind is an important signature of solar activity, solar cycle, and solar wind sources, as well as coronal heating processes.
Leon Ofman, Yogesh, Silvio Giordano
doaj   +1 more source

Effect of Solar Irradiation Inter-Annual Variability on PV and CSP Power Plants Production Capacity: Portugal Case-Study

Energies
The sizing of solar energy power plants is usually made using typical meteorological years, which disregards the inter-annual variability of the solar resource.
Ailton M. Tavares, Ricardo Conceição, Francisco M. Lopes, Hugo G. Silva   +3 more
doaj   +1 more source

A Unified Polymer Hydrogel Electrolyte Integrating Robust Adhesion, Self‐Healing, and Oxygen Permeability in Flexible Neutral Zn‐Air Batteries

Advanced Materials, EarlyView.
Flexible neutral Zn‐air batteries achieving a remarkable 3000‐cycle lifespan and withstanding 1000 bending cycles are reported. This performance is realized by employing a 3D physically cross‐linked neutral hydrogel electrolyte that integrates high adhesion, self‐healing, O2 permeability, and CO2 tolerance to resolve critical stability challenges ...
Zhenyu Sun, Kaiming Liao, Wei Zhou, Zongping Shao   +3 more
wiley   +1 more source

Efficient Osmotic Energy Conversion Enabled by Self‐Standing COF Membranes With Varied Sulfonic Acid Group Density

Advanced Materials, EarlyView.
Self‐standing, strong sulfonated covalent organic framework membranes with varied ionic‐group density are developed for osmotic energy conversion. Optimized charge‐governed nanochannels enable highly selective ion transport, delivering a power density of 24.53 W m−2 under seawater/freshwater salinity gradients.
Xi Ma, Xiaoxiao Cheng, Tamara Fischer, Jürgen Senker, Qi Sun, Seema Agarwal   +5 more
wiley   +1 more source

The impacts of climate change on estuarine ecosystems : a case study on the Eden estuary, Fife, Scotland

, 2013
The Eden Estuary is a small, coastal inlet situated in Fife between the Tay and Forth Estuaries on the east coast of Scotland. A multidisciplinary case study of the estuary was conducted over a three year period observing the dynamic responses of biotic
Chocholek, Melanie
core