Several Lucentia research colleagues have recently published two articles within the framework of the BALLADEER and AETHER-UA projects Lucentia researchers have just had two publications published in June and July. Both articles, although different from each other, are part of the Balladeer and Aether-UA projects. The first paper, entitled "A Data-Driven Methodology for Guiding the Selection of Preprocessing Techniques in a Machine Learning Pipeline", was presented at the 35th International Conference on Advanced Information Systems Engineering. In this #paper, Jorge García, Alejandro Maté and Juan Carlos Trujillo, propose a novel #methodology for improving the selection of #preprocessing techniques, both from the point of view of the #MachineLearning model and the characteristics of the data. The second article, entitled "Feature engineering of EEG applied to mental disorders: a systematic mapping study", has been published in the scientific journal Applied Intelligence. The authors, Sandra García, Jorge García, Miguel Ángel Teruel, Alejandro Maté and Juan Carlos Trujillo, through the review and analysis of more than 900 articles, present a #SystematicMappingStudy (SMS) focused…