A Field Study on Reference Architectural Decisions for Developing a UML-based Software Product Line Tool
Leandro F. Silva (Universidade Estadual de Maringá - Brazil), Edson OliveiraJr (Universidade Estadual de Maringá - Brazil), Rodrigo Santos (UNIRIO - Brazil)

Analysis of Microservice Evolution using Cohesion Metrics
Mateus Moreira (University of Campinas - Brazil), Breno de França (UNICAMP - Brazil)

DocStone: A Blockchain-based Architecture for a Customizable Document Registration Service
Pamella Soares (Universidade Estadual do Ceará - Brazil), Raphael Saraiva (Universidade Estadual do Ceará - Brazil), Iago Fernandes (Universidade Estadual do Ceará - Brazil), Jerffeson Teixeira de Souza (Universidade Estadual do Ceará - Brazil), Ricardo Loiola(PUCRS - Brazil)

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)

OfflineManager: A Lightweight Approach for Managing Offline Status in Mobile Applications
Sidarta Fernandes (Federal University of São Carlos - Brazil), Matheus Lucena (IFSP - Brazil), Luis Pegurin (Federal University of São Carlos - Brazil), Juliano Blanco (Ufscar - Brazil), Daniel Lucrédio (UFSCar - Universidade Federal de São Carlos - 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)

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)

The Mysterio framework for developing cooperative Multi-UAV Systems
Antônio Sávio Nascimento Cavalcante (Universidade Estadual de Campinas - Brazil), Breno Bernard Nicolau de França (UNICAMP - Brazil)

Using MDA to Transform Business Processes from Analysis Classes
Habner Boesing (Federal Technological University of Paraná - Brazil), Simone Matos (UTFPR - Brazil), Vinícius Camargo Andrade (Federal University of Technology - Paraná - Brazil), Ezequiel Gueiber (State University of Ponta Grossa - 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)