Results 111 to 120 of about 2,661,724 (245)

Private Speech as Social Action [PDF]

, 2015
An important theoretical construct within the Vygotskian sociocultural approach to second language learning is private speech. Within a conversation-analytic framework, an agnostic stance is taken in this paper toward the possible intrapsychological ...
Eric Hauser
core   +2 more sources

Examining the Affordances of Engineering and Curricular Supports for Learning Among Emerging Bilingual Elementary Afterschool Students

Science Education, Volume 110, Issue 2, Page 357-378, March 2026.
ABSTRACT Engineering design provides students with unique opportunities to engage with disciplinary knowledge and practices by engaging with technologies and each other through the design process. In this paper, we identify how the co‐construction of an engineering afterschool club culture supported students’ engagement in epistemic practices of ...
Kathryn M. Bateman, Gregory J. Kelly, Peter R. Licona, Christine M. Cunningham   +3 more
wiley   +1 more source

Dependence of CMI Growth Rates on Electron Velocity Distributions and Perturbation by Solitary Waves

, 2007
We calculate growth rates and corresponding gains for RX and LO mode radiation associated with the cyclotron maser instability for parameterized horseshoe electron velocity distributions.
Bastian, Baumback, Begelman, Bekefi, Benson, Benson, Bingham, Boehm, Brown, Calvert, Chaston, de Feraudy, Delory, Dulk, Ergun, Ergun, Ergun, Ergun, Goldman, Green, Green, Gurnett, Gurnett, Gurnett, Hanasz, Hashimoto, Hayes, Huff, J. D. Scudder, Kumamoto, Lee, Louarn, Louarn, McFadden, McFadden, Mellott, Melrose, Menietti, Menietti, Menietti, Morozova, Mutel, Mutel, Mutel, Omidi, Omidi, Omidi, Pottelette, Pottelette, Pottelette, Press, Pritchett, Pritchett, Pritchett, Pritchett, Pritchett, Pritchett, R. L. Mutel, Roux, Strangeway, Strangeway, T. R. Jaeger, Treumann, W. M. Peterson, Willes, Winglee, Wong, Wu, Wu, Xin, Yoon, Zarka   +71 more
core   +2 more sources

Pitch angle scattering of relativistic electrons near EMIC resonances in diverging magnetic fields [PDF]

, 2017
A theoretical study of the propagation of left hand polarized shear Alfvén waves in spatially decreasing magnetic field geometries near the EMIC resonance, including the spectrum and amplitude of the mode converted EMIC waves and the pitch angle ...
Eliasson, B, Papadopoulos, K
core   +1 more source

Diffusion Coefficients for Resonant Relativistic Wave‐Particle Interactions Using the PIRAN Code

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract Quasilinear diffusion coefficients can be used to model the response of charged particles to resonant wave‐particle interactions. The calculation of these coefficients is sufficiently complicated and arduous to render it prohibitive to many potential users, because of the expense in time spent developing the code.
Oliver Allanson, Thomas Kappas, James Tyrrell, Gregory S. Cunningham, Matthew Brown, Adrian Garcia, Clare Watt, Suman Chakraborty, Daniel Ratliff, Jonathan Rae, Sarah Bentley, Sean Elvidge, David Themens   +12 more
wiley   +1 more source

Impact of EMIC Waves on Electron Flux Dropouts Measured by GPS Spacecraft: Insights From ELFIN

Journal of Geophysical Research: Space Physics
Although the effects of electromagnetic ion cyclotron (EMIC) waves on the dynamics of the Earth's outer radiation belt have been a topic of intense research for more than 20 years, their influence on rapid dropouts of electron flux has not yet been fully
D. Mourenas, A. Artemyev, Xiaojia Zhang, V. Angelopoulos   +3 more
semanticscholar   +1 more source

A case study of correspondence between Pc1 activity and ionospheric irregularities at polar latitudes

Earth, Planets and Space, 2020
A possible driver of precipitation of magnetospheric energetic electrons in the high-latitude atmosphere is represented by electromagnetic ion-cyclotron (EMIC) magnetospheric waves.
P. Francia, M. Regi, M. De Lauretis, M. Pezzopane, C. Cesaroni, L. Spogli, T. Raita   +6 more
doaj   +1 more source

Quantitative assessment of Earth’s radiation belt modeling [PDF]

, 2017
The “Quantitative Assessment of Radiation Belt Modeling” focus group was in place at Geospace Environment Modeling from 2014 to 2018. The overarching goals of this focus group were to bring together the current state‐of‐the‐art models for the ...
Albert, J. M., Li, Wen, Morley, S. K., Tu, Weichao   +3 more
core   +1 more source

Simultaneous Observations of Electron Phase Space Density Variations in the Geostationary Orbit by GK2A, GOES‐16, and GOES‐17

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents simultaneous measurements of electron phase space density (PSD) gradients in geostationary orbit using data from GK2A, GOES‐16, and GOES‐17. By leveraging a three‐satellite configuration, we provide statistical results of PSD gradient estimation in invariant coordinates.
N.‐Y. Lee, J. Seon, G. W. Na, C.‐H. Lee, W.‐H. Seol, K.‐C. Kim   +5 more
wiley   +1 more source

Characterizing Ion‐Scale Fluctuations Around Dipolarization Fronts in Earth's Magnetotail

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract In the Earth's magnetotail bursty bulk flows are often associated with dipolarizing magnetic flux bundles. The leading edges of such earthward‐moving flux bundles are called dipolarization fronts (DF). In the present study we investigate the characteristics of ion‐scale oscillations embedded inside DFs, using observations from NASA's ...
M. Hosner, R. Nakamura, D. Schmid, E. V. Panov   +3 more
wiley   +1 more source