Results 101 to 110 of about 166,601 (310)

High resolution measurements and modeling of auroral hydrogen emission line profiles [PDF]

, 2003
Measurements in the visible wavelength range at high spectral resolution (1.3 A° ) have been made at Longyearbyen, Svalbard (15.8 E,78.2 N) during an interval of intense proton precipitation.
Frey, H.U., H. U. Frey, D. Lummerzheim, Galand, M., Lummerzheim, D., S. C. Robertson, Robertson, SC, Frey, HU, Peticolas, L.M., Lummerzheim, D, Furniss, I, Baumgardner, J, M. Mendillo, Lanchester, B.S., J. Baumgardner, Baumgardner, J., Rees, M.H., I. Furniss, Lanchester, BS, Robertson, S. C., Furniss, I., M. Galand, Peticolas, L. M., Mendillo, M., Galand, M, B. S. Lanchester, Rees, MH, M. H. Rees, Peticolas, LM, Rees, M. H., L. M. Peticolas, Robertson, S.C., Lanchester, B. S., Mendillo, M, Frey, H. U.   +34 more
core   +1 more source

The Polarity of IMF By Strongly Modulates Particle Precipitation During High‐Speed Streams

Geophysical Research Letters
Recent studies have suggested that the interplanetary magnetic field (IMF) By component modulates particle precipitation during solstices, or periods of high dipole tilt Ψ.
J. Laitinen, L. Holappa, H. Vanhamäki
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

In situ soil cementation with ureolytic bacteria by surface percolation

, 2012
The possibility of using microbiological processes to improve the mechanical properties of soil by undisturbed in situ application has gained attention over recent years. This paper describes a new variation of in situ soil reinforcement technology based
Cheng, L., Cord-Ruwisch, R., Cheng, Liang   +2 more
core   +1 more source

Positive storm effects in the dayside polar ionospheric F-region observed by EISCAT and ESR during the magnetic storm of 15 May 1997 [PDF]

, 2002
International audienceEISCAT/ESR radar data and in situ FAST and POLAR satellite observations are coordinately analyzed to investigate positive ionospheric storm effects in the dayside upper F-region in both the polar cap and the auroral oval during the ...
Schlegel, K., Liu, H. X., Cai, H., Ma, S. Y., S. Y. Ma, Ma, S.Y., Cai, H. T., Lu, G., Ma, S., H. T. Cai, Liu, H.X., H. X. Liu, Liu, H., Cai, H.T., K. Schlegel, G. Lu   +15 more
core   +1 more source

Large-scale magnetic field oscillations and their effects on modulating energetic electron precipitation

Frontiers in Astronomy and Space Sciences
In this study, we present simultaneous multi-point observations of magnetospheric oscillations on a time scale of tens of minutes (forced-breathing mode) and modulated whistler-mode chorus waves, associated with concurrent energetic electron ...
Murong Qin, Wen Li, Qianli Ma, Qianli Ma, Xiao-Chen Shen, Leslie Woodger, Robyn Millan, Vassilis Angelopoulos   +7 more
doaj   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Energetic electron precipitation in weak to moderate corotating interaction region-driven storms [PDF]

, 2017
High-energy electron precipitation from the radiation belts can penetrate deep into the mesosphere and increase the production rate of NOx and HOx, which in turn will reduce ozone in catalytic processes.
Johan Stadsnes, Linn‐Kristine Glesnes Ødegaard, Stadnes, Johan, Ødegaard, Linn-Kristine Glesnes, Sandanger, Marit Irene, Hilde Nesse Tyssøy, Finn Søraas, Søraas, Finn, Tyssøy, Hilde Nesse, Marit Irene Sandanger   +9 more
core   +1 more source

Energetic Electron Precipitation Driven by Electromagnetic Ion Cyclotron Waves from ELFIN's Low Altitude Perspective. [PDF]

Space Sci Rev, 2023
Angelopoulos V, Zhang XJ, Artemyev AV, Mourenas D, Tsai E, Wilkins C, Runov A, Liu J, Turner DL, Li W, Khurana K, Wirz RE, Sergeev VA, Meng X, Wu J, Hartinger MD, Raita T, Shen Y, An X, Shi X, Bashir MF, Shen X, Gan L, Qin M, Capannolo L, Ma Q, Russell CL, Masongsong EV, Caron R, He I, Iglesias L, Jha S, King J, Kumar S, Le K, Mao J, McDermott A, Nguyen K, Norris A, Palla A, Roosnovo A, Tam J, Xie E, Yap RC, Ye S, Young C, Adair LA, Shaffer C, Chung M, Cruce P, Lawson M, Leneman D, Allen M, Anderson M, Arreola-Zamora M, Artinger J, Asher J, Branchevsky D, Cliffe M, Colton K, Costello C, Depe D, Domae BW, Eldin S, Fitzgibbon L, Flemming A, Frederick DM, Gilbert A, Hesford B, Krieger R, Lian K, McKinney E, Miller JP, Pedersen C, Qu Z, Rozario R, Rubly M, Seaton R, Subramanian A, Sundin SR, Tan A, Thomlinson D, Turner W, Wing G, Wong C, Zarifian A.   +85 more
europepmc   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source