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The purpose of this paper is to present an approach for structural weight minimization under von Mises stress constraints and self-weight loading based on the topological derivative method. Although self-weight loading topology has been the subject of intense research, mainly compliance minimization has been addressed.

The resulting minimization problem is solved with the help of the topological derivative method, which allows the development of efficient and robust topology optimization algorithms. Then, the derived result is used together with a level-set domain representation method to devise a topology design algorithm.

Numerical examples are presented, showing the effectiveness of the proposed approach in solving a structural topology optimization problem under self-weight loading and stress constraint. When the self-weight loading is dominant, the presence of the regularizing term in the formulation is crucial for the design process.

The novelty of this research work lies in the use of a regularized formulation to deal with the presence of the self-weight loading combined with a penalization function to treat the von Mises stress constraint.

The repercussions of Portugal's colonialism are not widely discussed. The marks of colonialism in the public space are still present in the urban landscape of Portuguese cities. Despite the growing activity of the Black movement's in the country, they are still not being systematically considered in the design of public policies. Moreover, the Portuguese census does not include any data collection on ethnic belonging. Therefore, it is difficult to deepen the knowledge of the Black communities. The Black community has been growing in Porto, the second-largest city in Portugal and it remains highly invisible. Starting from a collaborative project between Portuguese and American professionals, acting in the fields of sociology and socially engaged curatorial and contemporary art practices, an experimental approach was developed to map and cocreate with the Black community in Porto. By using digital tools while collecting, analyzing, and sharing data, and by applying an ethnographic approach and techniques of exploration from documentary photography, the team developed a collaborative project side by side with the community. An exchange between disciplinary knowledge and “various subject positions,” with all participants engaging in an exploration of how to begin decolonizing the city through those tools took place at the project TRAVESSIA. This chapter explores how the Black nonelite is expressing and questioning race and ethnic inequalities in Porto by discussing the results of this collaborative project.