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University of Virginia astronomer Kelsey Johnson recently delivered a talk titled "How were the most ancient objects in the universe formed?" as part of the National Science Foundation's (NSF) Disting...
ACTION OF THE JOHNSON-TORELLI GROUP ON REPRESENTATION VARIETIES
JOHNSON-TORELLI mapping class group
2015/9/29
Let Σ be a compact orientable surface with genus g and n boundary components B = (B1,...,Bn). Let c = (c1,...,cn) ∈ [−2,2]n. Then the
mapping class group MCG of Σ acts on the relative SU(2)-cha...
Professor Chris E. Johnson，The Department of Civil and Environmental Engineering at Syracuse University（图）
Environmental chemistry Statistical analysis
2014/10/23
Professor Johnson is involved in a number of research projects in the broad area of environmental chemistry. He has ongoing research interests in the fate of trace metals (Pb, Zn, Cu, Ni) in forest so...
Associate Professor Steven Johnson,Department of Mathematics at Massachusetts Institute of Technology（图）
Department of Mathematics at Massachusetts Institute of Technology Associate Professor Nanophotonics High-Performance Computation
2014/8/21
Steven G. Johnson received his Ph.D. in physics from MIT in 2001, where he was also an undergraduate student (receiving B.S. degrees in physics, mathematics, and EECS in 1995). He joined the MIT facul...
List-decoding of binary Goppa codes up to the binary Johnson bound
Error correcting codes, algebraic geometric codes list-decoding
2011/2/21
We study the list-decoding problem of alternant codes, with the notable case of classical Goppa codes. The major consideration here is to take into account the size of the alphabet, which shows great ...
New series in the Johnson cokernels of the mapping class groups of surfaces
New series Johnson cokernels mapping class groups of surfaces
2011/1/20
Let g,1 be a compact oriented surface of genus g with one boundary component,andMg,1 its mapping class group. Morita showed that the image of the k-th Johnson homomorphism M
k of Mg,1 is contained ...
We consider the {\it infinite Johnson graph} $J_{\infty}$ whose vertex set consists of all subsets $X\subset {\mathbb N}$ satisfying $|X|=|{\mathbb N}\setminus X|=\infty$ and whose edges are pairs of...
New and improved Johnson-Lindenstrauss embeddings via the Restricted Isometry Property
New improved Johnson-Lindenstrauss embeddings Restricted Isometry Property
2010/11/29
Consider an m×N matrix with the Restricted Isometry Property of order k and level δ, that is, the norm of any k-sparse vector in RN is preserved to within a multiplicative factor of 1±δ under applic...
Professor Roy A. Johnson，The Department of Geosciences at University of Arizona（图）
Professor Roy A. Johnson seismic reflection fossil-fuel exploration
2009/12/21
Professor Roy A. Johnson，The Department of Geosciences at University of Arizona.His research interests are Reflection seismology applied to analysis and modeling of complex crustal structure, composit...
Karst Waters and Environmental Impacts, G. Gunay, and A.I. Johnson (eds)
Karst Waters G. Gunay Environmental Impacts A.I. Johnson
2009/5/27
Karst Waters and Environmental Impacts, G. Gunay, and A.I. Johnson (eds)。
WILLIAM SUMMER JOHNSON, ONE of the major figures in the development of the art and science of organic synthesis in the second half of the twentieth century, was born in New Rochelle, New York, on Febr...
HAROLD JOHNSON, ONE OF the most productive and influential observational astrophysicists of this century, was born in Denver, Colorado, on April 17, 1921, the son of Averill C. and Marie (Sallach) Joh...
JOHN RAVEN JOHNSON WAS born in Chicago, Illinois, on August 9, 1900. He developed into a precocious science student and received his B.S. degree at the University of Illinois in 1919. He stayed on at ...