18,498 research outputs found
The Monster in Our House: Racial Incidents on College Campuses
Reports of racial incidents on college campuses have risen dramatically in the past four years. Data from recent surveys indicate that minority students, specifically blacks, will experience some form of discrimination during their academic careers.[1] Recent data from other studies reveal that racial and ethnic violence has occurred on at least 70 U.S. college campuses.[2] Efforts to assert one racial/ethnic group over another have often created social conflicts. These social disagreements may take several forms, usually imitating behavior outside of school: shouting discriminatory remarks or becoming physically aggressive or violent
Altitude determination by Kalman filtering Third quarterly progress report
Mathematical background for dynamic, geometric, and statistical analyses and transformations for inertial attitude reference determination by Kalman filterin
Statistical State Dynamics: a new perspective on turbulence in shear flow
Traditionally, single realizations of the turbulent state have been the
object of study in shear flow turbulence. When a statistical quantity was
needed it was obtained from a spatial, temporal or ensemble average of sample
realizations of the turbulence. However, there are important advantages to
studying the dynamics of the statistical state (the SSD) directly. In highly
chaotic systems statistical quantities are often the most useful and the
advantage of obtaining these statistics directly from a state variable is
obvious. Moreover, quantities such as the probability density function (pdf)
are often difficult to obtain accurately by sampling state trajectories even if
the pdf is stationary. In the event that the pdf is time dependent, solving
directly for the pdf as a state variable is the only alternative. However,
perhaps the greatest advantage of the SSD approach is conceptual: adopting this
perspective reveals directly the essential cooperative mechanisms among the
disparate spatial and temporal scales that underly the turbulent state. While
these cooperative mechanisms have distinct manifestation in the dynamics of
realizations of turbulence both these cooperative mechanisms and the phenomena
associated with them are not amenable to analysis directly through study of
realizations as they are through the study of the associated SSD. In this
review a selection of example problems in the turbulence of planetary and
laboratory flows is examined using recently developed SSD analysis methods in
order to illustrate the utility of this approach to the study of turbulence in
shear flow.Comment: 27 pages, 18 figures. To appear in the book "Zonal jets:
Phenomenology, genesis, physics", Cambridge University Press, edited by B.
Galperin and P. L. Rea
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