Searching for WR stars in I Zw 18 -- The origin of HeII emission
de Mello, Duilia
1998-05-28
Search results
77 records were found.
Comment: revised version, 6 pages, 1 figures in MNRAS LaTex style
Comment: 15 pages, 6 figures
From a detailed empirical analysis of the productivity of non financial firms across several countries and years we show that productivity follows a non-Gaussian distribution with `fat tails' in the large productivity region which are well mimicked by power law behaviors. We discuss how these empirical findings can be linked to a mechanism of exchanges in a social network where firms improve their productivity by direct innovation and/or by imitation of other firm's technological and organizational solutions. The type of network-connectivity determines how fast and how efficiently information can diffuse and how quickly innovation will permeate or behaviors will be imitated. From a model for innovation flow through a complex network we show that the expectation values of the productivity of each firm are proportional to its connectivit...
Econophysics, networks, minimum spanning tree, planar maximally filtered graph, financial data correlations
Comment: 13 pages, accepted for publication in Physica A
Comment: 18 pages, 7 figures
Comment: 5 pages, 2 color figures. To appear in the proceedings of
"Relativistic Astrophysics and Cosmology - Einstein's Legacy" (Eds.: B.
Aschenbach, V. Burwitz, G. Hasinger, and B. Leibundgut), 7 - 11 November
2005, Munich, Germany
Comment: 7 pages, 7 ps figures, uses mn.sty (included). Submitted for
publication to MNRAS
Comment: MNRAS in press. 5 pages, 4 figures in MNRAS LaTex style
