Edmundo Rofman

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We present a hierarchical way of designing the traffic light control of regular towns. We first give a a model for light synchronization based on Petri nets and minplus algebra. Using this modelling we decompose the problem in three parts : – computation of the cycle length of each traffic light, – computation of the starting time of each traffic light(More)
How far is neuroepithelial cell proliferation in the developing central nervous system a deterministic process? Or, to put it in a more precise way, how accurately can it be described by a deterministic mathematical model? To provide tracks to answer this question, a deterministic system of transport and diffusion partial differential equations, both(More)
the present work is devoted to describe a set of rules explaining the discriminating versus non-discriminating behavior of the di-basic stages and to characterize the role of each base in determining such a behavior. Bases are analyze as dual entities characterized by its chemical type and the number of H bonds involved in the codon-anticodon interaction. A(More)
We present a hierarchical way of designing the traffic light control of regular towns. We first give a a model for light synchronization based on Petri nets and minplus algebra. Using this modelling we decompose the problem in three parts : – computation of the cycle length of each traffic light, – computation of the starting time of each traffic light(More)
We consider the numerical resolution of hierarchical inventory problems under global optimization. First we describe the model as well as the dynamical stochastic system and the impulse controls involved. Next we characterize the optimal cost function and we formulate the Hamilton-Jacobi-Bellman equations. We present a numerical scheme and a fast algorithm(More)
In 1986, our hospitals were selected by a large Massachusetts independent practice HMO to administer a capitated program for psychiatric inpatients residing in Boston and in neighboring northern cities and towns. Administering this program necessitated designing new systems of accounting, utilization review, physician reimbursement, staff education,(More)
The authors compared the records of 59 psychiatric patients involutarily committed to a Veterans Administration hospital on an emergency basis with those of a control group of 59 psychiatric patients with respect to the number of assaults noted during the first 45 days of hospitalization. The committed group had a .41 probability and the control group a .08(More)
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