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Engineering and technology have a central role in shaping our reality that frequently goes unnoticed or not critically analyzed by engineers and engineering faculty and curricula. In so doing, the engineering that is taught, investigated (and improved), and practiced can unwittingly foster an ethical-political reality with which many engineers and engineering teachers may disagree. In this paper, drawing on literature from philosophy and sociology of technology and Latin-American liberating and decolonial traditions, the theoretical bases for a different engineering practice are set; an engineering committed to empowering people and constructing with them other possible socio-technical orders (and ethical-political realities). It can be called decolonial engineering. Then, grassroots (or popular) engineering, as it is practiced, taught, and improved (investigated) by some Brazilian university extension centres and groups, is presented and analyzed according to its decolonial foundations and outcomes. Finally, from grassroots engineering experience, some general traits of decolonial engineering education and research are derived. [ABSTRACT FROM AUTHOR]

This paper shows the results obtained from a group of simple and basic procedures used to assess slope instability in terms of shallow landslides on data-scarce hillsides at the slope unit scale. The procedures are based on engineering geological mapping to obtain geological and geotechnical data and on an adapted Hovland 3D safety factor (SF 3D) associated with a van Genuchten infiltration model to simulate the rainfall percolation. The procedures were applied on a data-scarce hillside in the Campos do Jordão municipality located in the Mantiqueira Mountains, São Paulo state, Brazil. This area was chosen because it is affected by shallow landslides due to a loss of shear strength when suction decreases or dissipates due to rainfall infiltration. The combined procedures permitted the total SF 3D to be obtained from the partial SF of each grid cell (considering 4 different rainfall events and quasi-saturation conditions) and the failure probability (SF 3D < 1) and marginal probability (1