This book constitutes the refereed proceedings of the 15th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management, IC3K 2023, held in Rome, Italy, during November 13-15, 2023.The 9 full papers and 8 short papers included in this book were carefully reviewed and selected from 166 submissions.

.- Knowledge Discovery and Information Retrieval. .- Closeness Centrality: Definition, and Its Computation for Homogeneous Multilayer Networks. .- Automatic Categorization of Software Repository Domains with Minimal Resources. .- Personalized Book Recommendations for Adults Using Deep Learning and Sophisticated Filtering Approaches. .- Dimensionality reduction of environmental data to predict species distribution. .- Is There an Optimal Depth of Residual Networks?. .- Modeling Interdependencies and Cascading Effects of Disasters on Critical Infrastructures. .- Knowledge Engineering and Ontology Development. .- Mechanical Fault Prediction Based on Event Knowledge Graph and Deep Learning. .- BioSTransformers for Health Ontologies Merging. .- Methodology For Real Estate Recommendation Based on Customer Behavior Knowledge as Context Approach. .- UpKG: A Framework for Integrating and Evaluating Novel Domains into Knowledge Graphs. .- An Approach Based on the Multifaceted Ontology to Development of Event Series Processing Tools. .- A Study of the Perceived Quality and Functionality of DEMO Process and Fact Models in the Health Domain and Improvements on Its Action Model. .- Knowledge Management and Information Systems. .- Revolutionary Synergy: The Fusion of Data Mesh and Data Fabric for Strategy Analytics in GRAPHYP Knowledge Graph. .- An Innovative Framework for Threshold Exceedance Forecasting in Timeseries Using Survival Analysis. .- Promoting Sustained Use of Assistive Technology Among the Elderly: A User Experience and Causal Attribution Theory Perspective on Caregiver Utterances. .- Knowledge Management in Financial Software Support Team: A Prototype Based on Ontology. .- A Conceptual Model for Mapping Organizational Knowledge Ecosystem.

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