Crise ecológica, escassez hídrica e ideologias: uma análise crítica da Carta de 2070

This article analyzes the relationship between geography and ideologies, through what has been called “ecological crisis”, focusing discussions around the water scarcity. The article is divided into three parts. At first, we describe the predominant approaches to water since the late twentieth century, worldwide. Then, we present some forms of relationship between ideologies and approaches to nature, in different historical moments and we focus on analyzing the speeches about the nature building on the “Development Ideology”, the “Progress Ideology” and “Sustainable Development Ideology”. In these discussions we present the different approaches given to water from these philosophies. Finally, we outline some considerations that aim to stimulate critical thinking about the current characteristics of social reproduction space

Machine Learning and Evolutionary Techniques in Interplanetary Trajectory Design

After providing a brief historical overview on the synergies between artificial intelligence research, in the areas of evolutionary computations and machine learning, and the optimal design of interplanetary trajectories, we propose and study the use of deep artificial neural networks to represent, on-board, the optimal guidance profile of an interplanetary mission. The results, limited to the chosen test case of an Earth–Mars orbital transfer, extend the findings made previously for landing scenarios and quadcopter dynamics, opening a new research area in interplanetary trajectory planning.</p