“There`s only beauty if there is an interlocutor. The beauty of the lagoon is always someone” (Mãe, 2017, p.40). Valter Hugo Mãe expresses our desire in the making of this paper to share our experience of meeting refugee children, as part of an ongoing research project dedicated to exploring the conditions in which they live in Baixada Fluminense, Rio de Janeiro, Brazil, and the influences they bring with them from their birth countries. In the process of conducting this research, we (...) were surprised by a group of children who belong to the Warao ethnic group, and who have been welcomed by the municipality of Nova Iguaçu, which is part of Baixada Fluminense. The Warao are indigenous peoples from the North of Venezuela and their name means “canoe,” given their close relationship with water. A group of displaced Warao children and their families arrived in Nova Iguaçu after having “camped” out in the surroundings of Novo Rio bus station for a few weeks, followed by a sojourn in a public shelter, where the differences between them and the existing members of the institution led to conflict. Through a religious institution’s initiative, the families then found shelter in a small farm in the city of Japeri. They stayed there for six months, but once again were threatened by the prospect of eviction, after which they were finally welcomed in the city of Nova Iguaçu. The families–five interconnected units–expressed the wish to remain together and a social service institution found them a closed school building, which was modified to accommodate the group. When the Covid pandemic struck, the research and study group GEPELID began following the daily routine of these children at the shelter school and at the Marambaia welfare center. In their meetings with the Warao, the researchers were struck by their references to the Buriti tree as the “tree of life,” and the depths of its implications for their identity. In exploring this concept, the research group’s experience of radical cultural difference revealed the extent to which research in the human sciences is always a meeting with the other, and the relation between researcher and subjects an occasion for dialogue. (shrink)

Some postulates are introduced to go from the classical Hamilton-Jacobi theory to the quantum one. We develop two approaches in order to calculate propagators, establishing the connection between them and showing the equivalence of this picture with more known ones such as the Schrödinger's and the Feynman's formalisms. Applications of the above-mentioned approaches to both the standard case of the harmonic oscillator and to the harmonic oscillator with time-dependent parameters are made.