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One of the main advantages of sequential data assimilation is that it does not require the availability of an adjoint model , and can be implemented as a post-processing toolbox that can be plugged into any model with little effort . The modelling has to include how and where the droplets impinge on the aircraft , how this water then freezes or runs back on the aerofoil . From the point of view of turbulent dispersion ( differential advection + turbulent diffusion ) , there is a significant discrepancy during the transition between dispersion scenarios ( see Figure 2 ) , between the experimental and modelled values of the horizontal distribution of plume concentration ( sy , defined from the transversal axis to the average transport direction ) . The mathematical core of this modeling is a sequence of large and sparse eigenvalue problems . Other applications of this modeling technique include making predictions about how air pollutants will act within defined geographic areas over a given period of time , using information from more than two inputs , and using it to make several other promising extensions . Most of the modelling is necessarily empirical due to the complexity of the process and accurate mathematical modelling of various aspects is fairly scarce . In fact , computer models are monolithic , difficult to reuse in a different context , and strongly tied to the modelling domain and scale of resolution . The modelling task of designing the operators and the ontological units is a knowledge engineering task accomplished by interviewing an expert . Cultures tend to adopt some model of schooling as the standard of excellence in schooling . These studies have argued that the correlation validates the rational addiction model and invalidates any model in which future consumption is not considered . Lacking any model or experience for how to do this , I decided to try to be the kind of department chairperson I would like to have as a faculty member . Consequently , HUNGRID is not only a virtual organization within the EGEE : its new elements make it easier to use the infrastructure for solving complex problems , such as the modelling of air pollution . We will present some model for the propagation of intense , ultrashort laser pulse in a nonlinear medium . Male Color Polymorphisms ( MCPs ) are hypothesized frequently to play a key role in speciation , particularly in the explosive divergence of some model fish systems . They argue that any model will contain abstractions , therefore it is not complete in the sense that it does not formalize the domain completely .