Results 61 to 70 of about 84,860 (301)

The association between stratospheric weak polar vortex events and cold air outbreaks

, 2009
Previous studies have identified an association between near-surface temperature anomalies in the Northern Hemisphere and weak stratospheric polar westerlies.
Baldwin, Baldwin, Baldwin, Barnett, Bracegirdle, Bueh, Cai, Cellitti, Charlton, Charney, Chen, Chen, Cohen, Cordero, Garfinkel, Hurrell, Hurrell, Jeong, Kalnay, Kenyon, Kolstad, Konrad, Kuroda, Limpasuvan, Limpasuvan, Lorenz, Martius, Matsuno, Matsuno, McIntyre, Mercer, Mukougawa, Otterå, Pickart, Pinto, Polvani, Reichler, Renfrew, Scaife, Scaife, Skogseth, Song, Stephenson, Takaya, Thompson, Thompson, Thompson, Walsh   +47 more
core   +1 more source

In situ evidence for renitrification in the Arctic lower stratosphere during the polar aura validation experiment (PAVE) [PDF]

, 2006
In-situ measurements of nitric acid (HNO3), ozone (O3), and nitrous oxide (N2O) were made from the NASA DC-8 during the Polar Aura Validation Experiment in January/February 2005.
Avery, Melody A, Dibb, Jack E., Sachse, G W, Scheuer, Eric   +3 more
core   +2 more sources

Cassini ISS observation of Saturn’s north polar vortex and comparison to the south polar vortex [PDF]

Icarus, 2017
We present analyses of Saturn’s north pole using high-resolution images captured in late 2012 by the Cassini spacecraft’s Imaging Science Subsystem (ISS) camera. The images reveal the presence of an intense cyclonic vortex centered at the north pole.
Kunio M. Sayanagi, John J. Blalock, Ulyana A. Dyudina, Shawn P. Ewald, Andrew P. Ingersoll   +4 more
openaire   +2 more sources

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Climatology and trends in the forcing of the stratospheric zonal-mean flow [PDF]

Atmospheric Chemistry and Physics, 2011
The momentum budget of the Transformed Eulerian-Mean (TEM) equation is calculated using the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis (ERA-40) and the National Centers for Environmental Prediction (NCEP) Reanalysis 2 (R-2 ...
E. Monier, B. C. Weare
doaj   +1 more source

Coreless and singular vortex lattices in rotating spinor Bose-Einstein condensates

, 2004
We theoretically investigate vortex-lattice phases of rotating spinor Bose-Einstein condensates (BEC) with the ferromagnetic spin-interaction by numerically solving the Gross-Pitaevskii equation.
J. Stenger, Kazushige Machida, M. Nakahara, Naoko Kobayashi, R. Rajaraman, Takeshi Mizushima   +5 more
core   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Synthesis of a Novel Thermoresponsive S53P4 Bioactive Glass Extract–Poloxamer 407 Injectable Hydrogels: Assessment of Biocompatibility and Antimicrobial Properties

Advanced Engineering Materials, EarlyView.
This study investigates innovative thermoreversible hydrogels derived from S53P4 bioactive glass extracts to aid in the healing of infected diabetic foot wounds. These injectable gels, which gel at body temperature, release beneficial ions and remain stable over time.
Marian G. Vargas Guerrero, Adrian Stiller, Alex Nygård, Matej Krivulka, Lars Galema, Erwin Peters, Jimmy Lucchesi, Peter Uppstu, Leena Hupa, Jacobus J. C. Arts   +9 more
wiley   +1 more source

The Antarctic stratospheric nitrogen hole: Southern Hemisphere and Antarctic springtime total nitrogen dioxide and total ozone variability as observed by Sentinel-5p TROPOMI [PDF]

Atmospheric Chemistry and Physics
Denitrification within the stratospheric vortex is a crucial process for Antarctic ozone hole formation, resulting in an analogous stratospheric “nitrogen hole”.
A. de Laat, J. van Geffen, P. Stammes, R. van der A, H. Eskes, J. P. Veefkind   +5 more
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source