Hey, how can we get this fellow William I. Newman to do a Wedtech? -tj
On 8/9/07, Roger Critchlow <[EMAIL PROTECTED]> wrote: > > > > On 8/9/07, Marcus G. Daniels <[EMAIL PROTECTED]> wrote: > > > > Right, "generative social science", a.k.a. "made up stuff"... > > > Speaking of which, for those in the vicinity of Los Alamos: > > Thursday, August 9th,2007 > > > > 4:00 pm - 5:00 pm > > > > CNLS Conference Room (TA-3, Bldg 1690) > > > > Gang Recruitment and Growth: A Cellular Automata and Directed Graph > > Approach to > > the Statistics of Gang Sizes > > > > > > William I. Newman > > UCLA > > > > Cellular automata models can be developed to describe the evolution of > > emergent > > dynamical systems that maintain a discrete character, including those with > > an > > implicit hierarchical character. Moreover, these models can be related to > > > > directed graphs. These methods have found widespread application in > > condensed > > matter physics (e.g., diffusion limited aggregation and crystal growth, > > sandpiles andself-organized criticality) as well as in earth and > > environmental > > > > physics (e.g., models of earthquakes and river networks). In particular, > > models > > developed for forest fires are manifestly complex systems that show > > well-preserved scaling laws relating to the frequency of forest fires > > relative > > > > to their size. In sociological studies of conflict and deadly quarrels, > > similar > > statistical scaling laws have been observed, e.g., Richardson, with > > identical > > power-law indices. In earlier work, Gabrielov, Newman, and Turcotte (199?) > > > > succeeded in deriving from first principles those scaling laws. Here, we > > show > > that a simple redefinition of terms makes it possible for the statistics of > > gangs to be obtained from these other cellular automata models. In > > particular, > > > > by equivalencing the recruitment of gang members in the sociological problem > > with the planting of trees in the environmental problem, the observed > > statistics of gang populations and their prevalence can be derived. > > > > > > LANL Host: Mac Hyman, T-7 > > > > > > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org > -- ========================================== J. T. Johnson Institute for Analytic Journalism -- Santa Fe, NM USA www.analyticjournalism.com 505.577.6482(c) 505.473.9646(h) http://www.jtjohnson.com [EMAIL PROTECTED] "You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete." -- Buckminster Fuller ==========================================
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
