How do trivial refactorings affect classification prediction models?
Darwin Pinheiro (Federal University of Ceará - Brazil), Carla Ilane Moreira Bezerra (Universidade Federal do Ceará - UFC - Brazil), Anderson Uchôa (Federal University of Ceará (UFC) - Brazil)

TechSpaces: Identifying and Clustering Popular Programming Technologies
Guilherme Miranda (Universidade Federal de Minas Gerais - Brazil), João Eduardo Montandon (Universidade Federal de Minas Gerais - Brazil), Marco Tulio Valente (UFMG - Brazil)

On the Nature of Duplicate Pull Requests: An Empirical Study Using Association Rules
Cleyciane Lima (Federal University of Acre - Brazil), Daricélio Soares (Federal University of Acre - Brazil)

Connecting Non-Functional Requirements to Open Source Ecosystems Health
Simone da Silva Amorim (Federal Institute of Bahia - Brazil), John D. McGregor (Clemson University - USA), Eduardo Santana de Almeida (Universidade Federal da Bahia - Brazil), Christina von Flach Garcia Chavez (Universidade Federal da Bahia - Brazil)