A study of annular slurry jet for abrasive waterjet cutting
A Study of Annular Slurry Jet for Abrasive Waterjet Cutting
Spreading layer of two-dimensional buoyant jet
A two dimensional buoyant jet, discharged vertically into a stratified fluid with no crossflow, is considered. Simple equations are developed with dimensional analysis to predict the location and concentration of effluent as it begins to spread horizontally from the buoyant jet axis; the dimensionless independent variables are determined by a stratification parameter and the jet‐source flux of either momentum or buoyancy. Scale model tests verify the form of these equations and provide experimental values of coefficients not provided by the dimensional analysis. The results are compared to estimates made using the integral equations and found to provide a better description of the location and thickness of the spreading layer.
REFORMA DO ESTADO E AS POLÍTICAS PARA A EDUCAÇÃO SUPERIOR NO BRASIL NOS ANOS 90
This article aims at discussing the federal policies for higher education implemented in Brazil in the 1990s. It assumes that such policies are based on socio-political choices and interests linked to the changes occurring in the contemporary Brazilian scene, changes that have deep historical roots, which emerge in the process of reformation of the Brazilian State. This situation implies alterations in the field of public policies, and more particularly in that of social policies, since the on-going official proposals and projects are characterized by a decrease of the role of State. The borders between public and private affairs have become increasingly blurred in a process detrimental to the former. The contradictions in the federal policies for higher education are analyzed here, as well as their results as for the following fields: institutional diversification and differentiation; assessment criteria, broadening and privatization of this level of education.