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Junshik Um

2017

Um, J. and G.M. McFarquhar (2017): Quantifying errors in sizing small ice crystals using forward scattering probes, Atmospheric Measurement Techniques (submitted)
D. Baumgardner, S. J. Abel, D. Axisa, R. Cotton, J. Crosier, P. Field, C. Gurganus, A. Heymsfield, A. Korolev, M. Krämer, P. Lawson, G. McFarquhar, Z. Ulanowski, and J. Um (2017): Cloud Ice Properties: In Situ Measurement Challenges, Meteorological Monographs, American Meteorological Society, Vol 58, pp9.1--9.23

2015

Junshik Um, and Greg M. McFarquhar (2015): Formation of Atmospheric Halos and Applicability of Geometric Optics for Calculating Single-Scattering Properties of Hexagonal Ice Crystals: Impacts of Aspect Ratio and Ice Crystal Size, Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier BV, Vol 165, pp134--152

2013

Junshik Um, and Greg M. McFarquhar (2013): Optimal Numerical Methods for Determining the Orientation Averages of Single-Scattering Properties of Atmospheric Ice Crystals, Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier BV, Vol 127, pp207--223
Junshik Um and Greg M. McFarquhar: Applicability of geometric optics method for calculations of single-scattering properties of atmospheric ice crystals
Blue Waters Symposium 2015, Dec 31, 1969

Junshik Um, G. McFarquhar: Efficient Numerical Orientation Average for Calculations of Single-Scattering Properties of Small Atmospheric Ice Crystals


4th Atmospheric System Research (ASR) Science Team Meeting; Potomac, Maryland, U.S.A., Mar 19, 2013

Junshik Um and G. M. McFarquhar: Formation of Atmospheric Halos by Hexagonal Ice Crystals


American Meteorological Society 14th Conference on Atmospheric Radiation; Boston, Massachusetts, U.S.A., Jul 7, 2014

18 general, 9 exploratory allocations on Blue Waters awarded to Illinois researchers


Nov 24, 2014

Eighteen researchers at the University of Illinois at Urbana-Champaign received allocations on the Blue Waters petascale supercomputer at the National Center for Supercomputing Applications (NCSA). A portion of available time on Blue Waters is reserved for University faculty and staff projects like these that require the system’s unique capabilities. Ten of the awards will continue projects already running on Blue Waters, related to a wide variety of topics like tornadoes, steel casting, and cell function, among others. Eight allocations are for new projects.


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Blue Waters Illinois allocations awarded to 26 research teams


Mar 7, 2017

Twenty-six research teams at the University of Illinois at Urbana-Champaign have been allocated computation time on the National Center for Supercomputing Application's (NCSA) sustained-petascale Blue Waters supercomputer after applying in Fall 2016. These allocations range from 25,000 to 600,000 node-hours of compute time over a time span of either six months or one year. The research pursuits of these teams are incredibly diverse, ranging anywhere from physics to political science.


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