Design for social challenges -- A Usability Evaluation of Diabetes Mobile Applications -- Comparative Review of Research on Health Information Technology in Biomedical Informatics and Human-Computer Interaction -- The clothing design for the elderly care -- Designing inclusive user experience for impaired people. An RtD driven proposal for Albanian urban spaces -- Exploring Methods and Guidelines for Child-Computer Interaction Research with Refugee Children -- A Review of the Gaps and Opportunities of Nudity and Skin Detection Algorithmic Research for the Purpose of Combating Adolescent Sexting Behaviors -- ADAPT- The Approach to Accessible and Affordable Housing Solutions for People with Disability and Aging in Place -- Towards a multi-modal transportation scenario: an analysis about elderly needs -- Monetize This? Marketized-Commons Platforms, New Opportunities and Challenges for Collective Action -- PiChat: Smartphone Application to Expand the Social Network for the Elderly -- Design of Human-Computer Interaction Products for the user with "Mood Disorder" -- Design for culture and entertainment -- Multiple Representations of the UI, Score and Scale for Musical Performance System and Score DB -- Enhancing Cultural Engagement: A Heuristic Evaluation of World Cultural Heritage Websites -- Development of an Embodied Group Entrainmacent Response System to Express Interaction-Activated Communication -- Typography in interactive poetry: Gestures and their contributions to reading multiplicities -- Impact Analysis of Order of Presentation on Champion Book Selection in Bibliobattle -- Desertesejo (2000/2014): notes on the restoration process -- Collaborative design of urban spaces uses: from the citizen idea to the educational virtual development -- Optimizing user experience in amusement parks and enhancing their active role in urban spaces through new technology -- Design for intelligent urban environments -- The Semiotics of Toilet Signs -- Proposal for Encouraging Tourists to Stroll by Restricting Information Sharing Location to Destinations -- Proposal of Using Digital Mirror Signage and AR Pictogram for Follow Me Evacuation Guidance -- Verification of a psychological effect of hiding speedometer when exceeding a speed limit -- Tangible Map: Designing and Assessing Spatial Information Retrieval through a Tactile Interface -- Directing a Target Person among Multiple Users using the Motion Effects of an Image-based Avatar -- Analyzing social impact evaluation tools applied to design thinking: a proposal for improving user experience in urban spaces through social innovation -- Preliminary Comparison of a Curved Public Display vs a Flat Public Display -- Research on Innovative Design of Urban Smart Lighting Equipment based on User Experience -- Design and evaluation case studies -- The Relationship between Technology Self-Efficacy Beliefs and User Satisfaction - User Experience Perspective -- A Digital Twin-Based Multi-Modal UI Adaptation Framework for Assistance Systems in Industry 4.0 -- Preliminary Experiment for Navigation on Tactile Display using DC Motor -- Analysis of a Programming Process Sharing the Card Type Programming Tool "Pro-Tan" -- Study on Career Education for the Age of Computerization with Benefit of Inconvenience -- User experience and perceived usability of traditional and multimodal interfaces for scientific information seeking -- Participatory Design of System Messages in Petroleum Fields Management Software -- Workstations of the Future for Transformational Gains in Solving Complex Problems -- VujaDessin: A Sketch Learning Support System Using a Blurred Motif Object -- Tool UTAUT applied to measure interaction experience with NAO Robot -- Keep System Status Visible: Impact of Notifications on the Perception of Personal Data Transparency.

The 3 volume-set LNCS 11566, 11567 + 11568 constitutes the refereed proceedings of the Human Computer Interaction thematic area of the 21st International Conference on Human-Computer Interaction, HCII 2019, which took place in Orlando, Florida, USA, in July 2019. A total of 1274 papers and 209 posters have been accepted for publication in the HCII 2019 proceedings from a total of 5029 submissions. The 125 papers included in this HCI 2019 proceedings were organized in topical sections as follows: Part I: design and evaluation methods and tools; redefining the human in HCI; emotional design, Kansei and aesthetics in HCI; and narrative, storytelling, discourse and dialogue. Part II: mobile interaction; facial expressions and emotions recognition; eye-gaze, gesture and motion-based interaction; and interaction in virtual and augmented reality. Part III: design for social challenges; design for culture and entertainment; design for intelligent urban environments; and design and evaluation case studies.