UMAP 2019 HAAPIE (Human Aspects in Adaptive and Personalized Interactive Environments) Workshop Chairs' Welcome

It is our great pleasure to welcome you to the 4th International Workshop on Human Aspects in Adaptive and Personalized Interactive Environments (HAAPIE 2019). HAAPIE 2019 (http://haapie.cs.ucy.ac.cy) is a full-day workshop held on 09 June 2019 in conjunction with the 27th ACM Conference on User Modeling, Adaptation and Personalization (UMAP 2019), 09-12 June 2019 in Larnaca, Cyprus. Nowadays, the profound digital transformation has upgraded the role of the computational system into an intelligent multidimensional communication medium that creates new opportunities, competencies, models and processes. HAAPIE embraces the essence of the human-machine co-existence and aims to bring more inclusively the 'human-in-the-loop" approach/idea, adequately supporting the rising multi-purpose goals, needs, requirements, activities and interactions of users through new human-centered adaptive and personalized interactive environments, algorithms and systems. It brings together experts, researchers, students and practitioners from different disciplines in order to share ideas and experiences, lessons learned, approaches and results that could substantially contribute to the broader UMAP community. This year we received 10 submissions from all around the world covering a broad range of topics on the workshop's research themes. Each paper has been reviewed by up to 3 members of the IPC with expertise in the respective area to ensure the necessary relevance, quality and novelty.