Machine Learning -- Towards a model for the detection of firearms using machine learning algorithms: A case study -- Logistic regression model to predict the risk of contagion of COVID-19 in patients with associated morbidity using supervised machine learning -- Analysis of CoI Presence Indicators in a Moodle Forum using Unsupervised Learning Techniques -- Development of an intelligent Web system for the analysis of data in the F2 layer of the ionosphere using Machine Learning techniques and its implementation as potential earthquake precursors -- Recurrent Neural Networks (RNN) to predict the curve of COVID-19 in Ecuador during the El Niño Phenomenon -- Traffic Classification in Software-Defined Networking by Employing Deep Learning Techniques: A Systematic Literature Review -- Use of data mining strategies in environmental parameters in poultry farms, a case study -- Natural Language Processing and Semantic Web -- A First Approach to the Classification of Adverse Drug Effects on Twitter through Machine Learning -- SafercITies. Intelligent system for the analysis and monitoring of citizen security -- Automatic classification of Tweets identifying mental health conditions in Central American population in a pandemic -- SentiDariPers: Sentiment Analysis of Dari-Persian Tweets Based on People's Views and Opinion -- Reuse of Ontological Knowledge in Open Science: Models, Sources, Repositories -- Knowledge Graph for Retail commerce -- Automated creation of a repository for learning words in the area of computer science by keyword extraction methods and text classification -- Computer vision -- Automatic identification of hermaphrodite papaya applying computer vision and Machine Learning -- Automatic Detection of Melanoma in Human Skin Lesions -- Information systems based on computer vision for the control of Sigatoka black disease in bananas -- Knowledge-based systems -- Bibliometric analysis based on scientific mapping in the use of digital marketing strategies -- Innovating Chemistry Education: Integrating Cultural Knowledge through a Practical Guide and Augmented Reality -- Evaluation of a Grid for the Identification of Traffic Congestion Patterns.