Charles W. Carlson

THE USE OF GOOGLE TECHNOLOGY WITHIN THE CLASSROOM: GEOSCIENCE EDUCATION MODULES AND A VIRTUAL TOUR OF MID-ATLANTIC COASTAL GEOLOGY

Jennifer E. Georgen, Charles W. Carlson

Ghana, us (code pays fourni par la source)

Improving the smoothed complexity of FLIP for max cut problems

Ali Bibak, Charles W. Carlson, Karthekeyan Chandrasekaran

Finding locally optimal solutions for max-cut and max-$k$-cut are well-known PLS-complete problems. An instinctive approach to finding such a locally optimum solution is the FLIP method. Even though FLIP requires exponential time in worst-case instances, it tends to terminate quickly in practical …

us (code pays fourni par la source)

Optimal Lower Bounds for Sketching Graph Cuts

Charles W. Carlson, Alexandra Kolla, Nikhil Srivastava, Luca Trevisan

We study the space complexity of sketching cuts and Laplacian quadratic forms of graphs. We show that any data structure which approximately stores the sizes of all cuts in an undirected graph on $n$ vertices up to a $1+ε$ error must use …

Evidence for an extended reconnection line at the dayside magnetopause

T. D. Phan, M. P. Freeman, L. M. Kistler, Berndt Klecker et autres

We report in-situ detection by two spacecraft of oppositely directed jets of plasma emanating from a magnetic reconnection site at the Earth’s dayside magnetopause, confirming a key element inherent in all reconnection scenarios. The dual-spacecraft (Equator-S and Geotail) observations at the flank …

us, gb, de, jp, ro, fr (code pays fourni par la source)

Plasma sheet magnetic fields and flows during steady magnetospheric convection events

Tuija I. Pulkkinen, Noora Partamies, J. Kissinger, R. L. McPherron et autres

Inner magnetosphere magnetic field and plasma flow data are examined during 228 steady magnetospheric convection events. We find that the BZ component of the magnetic field around geostationary orbit is weaker than during average conditions and the plasma flow speeds are higher …

fi, us, de (code pays fourni par la source)

FAST observations of solar illumination and solar cycle dependence of the acceleration of upflowing ion beams on auroral field lines

Cynthia A. Cattell, John Dombeck, M. Eskolin, L. Hanson et autres

We present the magnetic local time, invariant latitude, and altitude distribution of upflowing ion beams and the dependence of their occurrence on whether the ionospheric foot point of the satellite is illuminated or dark and on solar cycle, as indicated by F10.7. …

us (code pays fourni par la source)

Precursor of the Earthward Penetrating Flow Channels and the Pre-onset Auroral Arc Intensification

Xiaoyan Xing, Lawrence R. Lyons, V. Angelopoulos, Davin E. Larson et autres

Mars Rover Model Celebration: Developing Inquiry Based Lesson Plans to Teach Planetary Science In Elementary And Middle School

Edgar A. Bering, E. Slagle, K. Nieser, Charles W. Carlson et autres

On the formation of pre‐onset azimuthal pressure gradient in the near‐Earth plasma sheet

Xiaoyan Xing, Larry R. Lyons, Xu‐Zhi Zhou, V. Angelopoulos et autres

Xing et al. (2011) demonstrated by case study that the plasma sheet pressure gradient at ∼11 REnear the substorm onset meridian undergoes a substantial duskward enhancement shortly before substorm onset as identified from the auroral poleward expansion. It was suggested that the …

us, ca (code pays fourni par la source)

Substorm‐like magnetospheric response to a discontinuity in the Bx component of interplanetary magnetic field

Motoharu Nowada, C.‐H. Lin, Z. Y. Pu, Song Fu et autres

We examined the magnetospheric magnetic field and plasma responses to an encounter of a discontinuity in the Bx component of interplanetary magnetic field (IMF). The striking variations of simultaneous solar wind dynamic pressure and IMF‐Bz were not observed. Furthermore, we found that …

cn, tw, us, de (code pays fourni par la source)

Subject: Design of NASA exposure Area at Tandem

D. Beavis, R. Karol, Asher Etkin, C. Theisen et autres

FAST Observations Of Solar Illumination And Solar Cycle Dependence Of The Altitude Of Auroral Acceleration And Ion Outflow

Cynthia A. Cattell, John Dombeck, M. Eskolin, L. Hanson et autres