Davinia Hernández Leo

91 papers A 2B 32C 2Journal 33Unranked 17
YearRankTypeTitle / Venue / Authors
2025 B conf
Analysing Teacher Orchestration Actions When Using Alerting and Mirroring Dashboards in CSCL.
ICALT
Lubna Hakami, Davinia Hernández Leo, Ishari Amarasinghe
2025 J jnl
Measurement of Teacher's Orchestration Load: A Framework and a Case Study on Tool Flexibility.
IEEE Access
Claudio Alvarez, Ishari Amarasinghe, Gustavo Zurita, Davinia Hernández Leo, Lubna Hakami, Luis A. Rojas
2025 J jnl
The promise and challenges of generative AI in education.
Behav. Inf. Technol.
Michail Giannakos, Roger Azevedo, Peter Brusilovsky, Mutlu Cukurova, Yannis A. Dimitriadis, Davinia Hernández Leo, Sanna Järvelä, Manolis Mavrikis, Bart Rienties
2025 — conf
Understanding Learner-LLM Chatbot Interactions and the Impact of Prompting Guidelines.
AIED (2)
Cansu Koyuturk, Emily Theophilou, Sabrina Patania, Gregor Donabauer, Andrea Martinenghi, Chiara Antico, Alessia Telari, Alessia Testa, Sathya Bursic, Franca Garzotto, Davinia Hernández Leo, Udo Kruschwitz, Davide Taibi, Simona Amenta, Martin Ruskov, Dimitri Ognibene
2025 J jnl
Understanding Learner-LLM Chatbot Interactions and the Impact of Prompting Guidelines.
CoRR
Cansu Koyuturk, Emily Theophilou, Sabrina Patania, Gregor Donabauer, Andrea Martinenghi, Chiara Antico, Alessia Telari, Alessia Testa, Sathya Bursic, Franca Garzotto, Davinia Hernández Leo, Udo Kruschwitz, Davide Taibi, Simona Amenta, Martin Ruskov, Dimitri Ognibene
2025 J jnl
Use Me Wisely: AI-Driven Assessment for LLM Prompting Skills Development.
CoRR
Dimitri Ognibene, Gregor Donabauer, Emily Theophilou, Cansu Koyuturk, Mona Yavari, Sathya Bursic, Alessia Telari, Alessia Testa, Raffaele Boiano, Davide Taibi, Davinia Hernández Leo, Udo Kruschwitz, Martin Ruskov
2024 — conf
How to Design Features for Promoting Social and Emotional Interactions During Computer Supported Collaborative Learning.
HCI (39)
Mariano Velamazán, Patricia Santos, Davinia Hernández Leo
2023 B conf
AI and Narrative Scripts to Educate Adolescents About Social Media Algorithms: Insights About AI Overdependence, Trust and Awareness.
EC-TEL
Emily Theophilou, Francesco Lomonaco, Gregor Donabauer, Dimitri Ognibene, J. Roberto Sánchez Reina, Davinia Hernández Leo
2023 — conf
ChatGPT and Generative AI in Higher Education: User-Centered Perspectives and Implications for Learning Analytics (short paper).
LASI Spain
Davinia Hernández Leo
2023 — conf
Learning to Prompt in the Classroom to Understand AI Limits: A Pilot Study.
AI*IA
Emily Theophilou, Cansu Koyuturk, Mona Yavari, Sathya Bursic, Gregor Donabauer, Alessia Telari, Alessia Testa, Raffaele Boiano, Davinia Hernández Leo, Martin Ruskov, Davide Taibi, Alessandro Gabbiadini, Dimitri Ognibene
2023 J jnl
Learning to Prompt in the Classroom to Understand AI Limits: A pilot study.
CoRR
Emily Theophilou, Cansu Koyuturk, Mona Yavari, Sathya Bursic, Gregor Donabauer, Alessia Telari, Alessia Testa, Raffaele Boiano, Davinia Hernández Leo, Martin Ruskov, Davide Taibi, Alessandro Gabbiadini, Dimitri Ognibene
2022 B conf
Exploring Teacher's Orchestration Actions in Online and In-Class Computer-Supported Collaborative Learning.
EC-TEL
Lubna Hakami, Ishari Amarasinghe, Eyad Hakami, Davinia Hernández Leo
2021 — ed.
Collaboration Technologies and Social Computing - 27th International Conference, CollabTech 2021, Virtual Event, August 31 - September 3, 2021, Proceedings
CollabTech
Davinia Hernández Leo, Reiko Hishiyama, Gustavo Zurita, Benjamin Weyers, Alexander Nolte, Hiroaki Ogata
2021 A conf
Investigating the Well-being Impacts of Educational Technologies Supported by Learning Analytics: An application of the initial phase of IEEE P7010 recommended practice to a set of cases.
LAK
Eyad Hakami, Davinia Hernández Leo
2021 — ed.
Learning Analytics Summer Institute Spain 2021: Learning analytics in times of COVID-19: Opportunity from crisis, Barcelona, Spain, July 7-9, 2021.
LASI Spain
Ángel Hernández-García, Davinia Hernández Leo, Manuel Caeiro-Rodríguez, Teresa Sancho Vinuesa
2021 — conf
Maker Education in Primary Education: Changes in Students' Maker-Mindset and Gender Differences.
TEEM
Judit Martínez-Moreno, Patricia Santos, Davinia Hernández Leo
2021 J jnl
Predicting Early Dropout: Calibration and Algorithmic Fairness Considerations.
CoRR
Marzieh Karimi-Haghighi, Carlos Castillo, Davinia Hernández Leo, Verónica Moreno Oliver
2021 B conf
Teachers' self-perception in maker education: three approaches for STEM professional development.
ICALT
Judit Martínez-Moreno, Patricia Santos, Davinia Hernández Leo
2020 B conf
The challenge of gathering self-reported moods: Cases using a classroom orchestration tool.
ICALT
Marc Beardsley, Milica Vujovic, Emily Theophilou, Davinia Hernández Leo, Marta Portero-Tresserra
2018 J jnl
Design for collective intelligence: pop-up communities in MOOCs.
AI Soc.
Muriel Garreta Domingo, Peter B. Sloep, Davinia Hernández Leo, Yishay Mor
2017 A conf
2
LAK
Roberto Martínez Maldonado, Davinia Hernández Leo, Abelardo Pardo, Hiroaki Ogata
2017 J jnl
Design and Implementation of Location-Based Learning Games: Four Case Studies with "QuesTInSitu: The Game".
IEEE Trans. Emerg. Top. Comput.
Javier Melero, Davinia Hernández Leo
2017 B conf
Intelligent Group Formation in Computer Supported Collaborative Learning Scripts.
ICALT
Ishari Amarasinghe, Davinia Hernández Leo, Anders Jonsson
2017 J jnl
Preface.
IxD&A
Davinia Hernández Leo, María Jesús Rodríguez-Triana, Paul Salvador Inventado, Yishay Mor
2016 — ed.
Proceedings of the First International Workshop on Learning Analytics Across Physical and Digital Spaces (CrossLAK 2016) co-located with 6th International Conference on Learning Analytics & Knowledge (LAK 2016), Edinburgh, Scotland, UK, April 25-29, 2016.
CrossLAK
Roberto Martínez Maldonado, Davinia Hernández Leo
2014 J jnl
Augmenting Reality and Formality of Informal and Non-Formal Settings to Enhance Blended Learning.
IEEE Trans. Learn. Technol.
Mar Pérez-Sanagustín, Davinia Hernández Leo, Patricia Santos, Carlos Delgado Kloos, Josep Blat
2014 — conf
Being able to accommodate activity's formal purposes as a critical factor when designing for 'location-based learning games' at scale.
BIIML
Javier Melero, Davinia Hernández Leo, Josep Blat
2014 — conf
From idea to VLE in half a day: METIS approach and tools for learning co-design.
TEEM
Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Luis Pablo Prieto, Davinia Hernández Leo, Yishay Mor
2014 B conf
ILDE: Community Environment for Conceptualizing, Authoring and Deploying Learning Activities.
EC-TEL
Davinia Hernández Leo, Juan I. Asensio-Pérez, Michael Derntl, Luis Pablo Prieto, Jonathan Chacón
2014 — conf
Teachers Can Be Involved in the Design of Location-based Learning Games - The Use of the Puzzle Board Metaphor.
CSEDU (3)
Javier Melero, Davinia Hernández Leo, Josep Blat
2014 J jnl
Technology-Supported Orchestration Matters: Outperforming Paper-Based Scriptingin a Jigsaw Classroom.
IEEE Trans. Learn. Technol.
Mara Balestrini, Davinia Hernández Leo, Raúl Nieves, Josep Blat
2013 B conf
Not Interested in ICT? A Case Study to Explore How a Meaningful m-Learning Activity Fosters Engagement among Older Users.
EC-TEL
Patricia Santos, Mara Balestrini, Valeria Righi, Josep Blat, Davinia Hernández Leo
2013 B ed.
Scaling up Learning for Sustained Impact - 8th European Conference, on Technology Enhanced Learning, EC-TEL 2013, Paphos, Cyprus, September 17-21, 2013. Proceedings
EC-TEL
Davinia Hernández Leo, Tobias Ley, Ralf Klamma, Andreas Harrer
2013 B conf
Signal Orchestration System for Face-to-Face Collaborative Learning Flows.
EC-TEL
Davinia Hernández Leo, Raúl Nieves, Juan Pablo Carrascal, Josep Blat
2013 B conf
Towards an Integrated Learning Design Environment.
EC-TEL
Davinia Hernández Leo, Jonathan Chacón, Luis Pablo Prieto, Juan I. Asensio-Pérez, Michael Derntl
2013 B conf
Transforming the Campus into a Digitally Augmented Learning Space Using etiquetAR.
EC-TEL
Mar Pérez-Sanagustín, Javier Melero, Davinia Hernández Leo, Carlos Delgado Kloos, Josep Blat
2013 J jnl
Web Collage: An implementation of support for assessment design in CSCL macro-scripts.
Comput. Educ.
Eloy D. Villasclaras-Fernández, Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis
2012 B ed.
21st Century Learning for 21st Century Skills - 7th European Conference of Technology Enhanced Learning, EC-TEL 2012, Saarbrücken, Germany, September 18-21, 2012. Proceedings
EC-TEL
Andrew Ravenscroft, Stefanie N. Lindstaedt, Carlos Delgado Kloos, Davinia Hernández Leo
2012 J jnl
4SPPIces: A case study of factors in a scripted collaborative-learning blended course across spatial locations.
Int. J. Comput. Support. Collab. Learn.
Mar Pérez-Sanagustín, Patricia Santos, Davinia Hernández Leo, Josep Blat
2012 J jnl
A Review of Constructivist Learning Methods with Supporting Tooling in ICT Higher Education: Defining Different Types of Scaffolding.
J. Univers. Comput. Sci.
Javier Melero, Davinia Hernández Leo, Josep Blat
2012 J jnl
Aplicación de Recomendaciones para la Alineación de Competencias, Metodología y Evaluación en Asignaturas de Ingeniería Telemática, Informática y Elect.
Rev. Iberoam. de Tecnol. del Aprendiz.
Davinia Hernández Leo, Verónica Moreno Oliver, Juan Manuel Dodero, Abelardo Pardo, María del Carmen Romero Ternero, Yannis A. Dimitriadis, Juan I. Asensio-Pérez
2012 B conf
Comparing the Effects on Students' Behavior of Two Hint Techniques Embedded in a Digital Game-Based Learning Tool.
ICALT
Kiira Hjert-Bernardi, Javier Melero, Davinia Hernández Leo
2012 B conf
Considerations for the Design of Mini-games Integrating Hints for Puzzle Solving ICT-Related Concepts.
ICALT
Javier Melero, Davinia Hernández Leo, Josep Blat
2012 B conf
Considering the Space in the Design of Learning Activities: The ISIS and 4SPPIces Models Applied to Science Inquiries.
ICALT
Mar Pérez-Sanagustín, Valérie Emin, Davinia Hernández Leo
2012 J jnl
Discovering the campus together: A mobile and computer-based learning experience.
J. Netw. Comput. Appl.
Mar Pérez-Sanagustín, Gustavo Ramírez-González, Davinia Hernández Leo, Mario Muñoz Organero, Patricia Santos, Josep Blat, Carlos Delgado Kloos
2012 J jnl
Modeling the Computing Based Testing domain extending IMS QTI: Framework, models and exemplary implementations.
Comput. Hum. Behav.
Patricia Santos, Davinia Hernández Leo, Mar Pérez-Sanagustín, Josep Blat
2012 J jnl
SOS: Orchestrating Collaborative Activities across Digital and Physical Spaces Using Wearable Signaling Devices.
J. Univers. Comput. Sci.
Davinia Hernández Leo, Raúl Nieves, Ernesto Arroyo, Andrea Rosales, Javier Melero, Josep Blat
2012 C conf
Space-aware Design Factors for Located Learning Activities Supported with Smart Phones.
ISPA
Patricia Santos, Mar Pérez-Sanagustín, Davinia Hernández Leo, Josep Blat
2012 — ch.
System Orchestration Support for a Collaborative Blended Learning Flow.
Intelligent Adaptation and Personalization Techniques in Computer-Supported Collaborative Learning
Luis de la Fuente Valentín, Mar Pérez-Sanagustín, Patricia Santos, Davinia Hernández Leo, Abelardo Pardo, Carlos Delgado Kloos, Josep Blat
2012 J jnl
Technology for Learning across Physical and Virtual Spaces.
J. Univers. Comput. Sci.
Carlos Delgado Kloos, Davinia Hernández Leo, Juan I. Asensio-Pérez
2011 — ch.
CLFP Intrinsic Constraints-Based Group Management of Blended Learning Situations.
Technology-Enhanced Systems and Tools for Collaborative Learning Scaffolding
Mar Pérez-Sanagustín, Javier Burgos, Davinia Hernández Leo, Josep Blat
2011 — conf
From a Pattern Language to a Pattern Ontology Approach for CSCL Script Design.
ICCSA (4)
Jonathan Chacón, Davinia Hernández Leo, Josep Blat
2011 J jnl
LdShake: Learning design solutions sharing and co-edition.
Comput. Educ.
Davinia Hernández Leo, Lauren Romeo, Miguel A. Carralero, Jonathan Chacón, Mar Carrió, Pau Moreno, Josep Blat
2011 B conf
Orchestration Signals in the Classroom: Managing the Jigsaw Collaborative Learning Flow.
EC-TEL
Davinia Hernández Leo, Raúl Nieves, Ernesto Arroyo, Andrea Rosales, Javier Melero, Pau Moreno, Josep Blat
2011 J jnl
QTIMaps: A Model to Enable Web Maps in Assessment.
J. Educ. Technol. Soc.
Toni Navarrete, Patricia Santos, Davinia Hernández Leo, Josep Blat
2011 J jnl
QuesTInSitu: From tests to routes for assessment in situ activities.
Comput. Educ.
Patricia Santos, Mar Pérez-Sanagustín, Davinia Hernández Leo, Josep Blat
2011 B conf
Remote Collaborative Multi-user Informal Learning Experiences: Design and Evaluation.
EC-TEL
Ernesto Arroyo, Valeria Righi, Roger Tarrago, Patricia Santos, Davinia Hernández Leo, Josep Blat
2011 — conf
Towards the Support of Scaffolding in Customizable Puzzle-Based Learning Games.
ICCSA Workshops
Javier Melero, Davinia Hernández Leo, Josep Blat
2010 J jnl
A multicase study for the evaluation of a pattern-based visual design process for collaborative learning.
J. Vis. Lang. Comput.
Davinia Hernández Leo, Iván M. Jorrín-Abellán, Eloy D. Villasclaras-Fernández, Juan I. Asensio-Pérez, Yannis A. Dimitriadis
2010 J jnl
Report of the Results of an IMS Learning Design Expert Workshop.
Int. J. Emerg. Technol. Learn.
Susanne Neumann, Michael Klebl, Dai Griffiths, Davinia Hernández Leo, Luis de la Fuente Valentín, Hans G. K. Hummel, Francis Brouns, Michael Derntl, Petra Oberhuemer
2010 B conf
Representing the Spaces When Planning Learning Flows.
EC-TEL
Mar Pérez-Sanagustín, Davinia Hernández Leo, Raúl Nieves, Josep Blat
2010 — conf
System Orchestration Support for a Flow of Blended Collaborative Activities.
INCoS
Luis de la Fuente Valentín, Mar Pérez-Sanagustín, Patricia Santos, Davinia Hernández Leo, Abelardo Pardo, Carlos Delgado Kloos, Josep Blat
2009 B conf
An Approach for Visually Supporting the Creation of Personal Development Plans.
ICALT
Javier Melero, Davinia Hernández Leo, Ernesto Arroyo, Albert Aguilar, Josep Blat
2009 B conf
Conditioning Factors for Group Management in Blended Learning Scenarios.
ICALT
Mar Pérez-Sanagustín, Davinia Hernández Leo, Josep Blat
2009 — conf
Considering the Intrinsic Constraints for Groups Management of TAPPS and Jigsaw CLFPs.
INCoS
Mar Pérez-Sanagustín, Javier Burgos, Davinia Hernández Leo, Josep Blat
2009 B conf
Enhancing Computer Assisted Assessment Using Rubrics in a QTI Editor.
ICALT
Patricia Santos, Xavier Colina, Davinia Hernández Leo, Javier Melero, Josep Blat
2009 B conf
Improving the Usability of an Approach for Visually Supporting the Creation of Personal Development Plans.
ICALT
Javier Melero, Davinia Hernández Leo, Ernesto Arroyo, Josep Blat
2009 J jnl
Incorporating assessment in a pattern-based design process for CSCL scripts.
Comput. Hum. Behav.
Eloy D. Villasclaras-Fernández, Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis
2009 J jnl
InstanceCollage: A Tool for the Particularization of Collaborative IMS-LD Scripts.
J. Educ. Technol. Soc.
Eloy D. Villasclaras-Fernández, Julio Alberto Hernández-Gonzalo, Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Alejandra Martínez-Monés
2009 B conf
Introducing Flexibility into CSCL Scripts for Blended Learning Scenarios.
ICALT
Mar Pérez-Sanagustín, Davinia Hernández Leo, Josep Blat
2009 — conf
QTI for Self-Assessment and Embedded-Assessment in Competence Oriented Scenarios: The Agora Case.
INCoS
Patricia Santos, Wenceslao Llobet, Davinia Hernández Leo, Josep Blat
2009 J jnl
Self-Development of Competences for Social Inclusion Using the TENCompetence Infrastructure.
J. Educ. Technol. Soc.
Amélie Louys, Davinia Hernández Leo, Judith Schoonenboom, Ruud Lemmers, Mar Pérez-Sanagustín
2009 — conf
Towards embedding assessment in CSCL scripts through selection and assembly of learning and assessment patterns.
CSCL (1)
Eloy D. Villasclaras-Fernández, Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Alejandra Martínez-Monés
2008 J jnl
Dialogic learning and interactive groups: an IMS LD template integrated in runtime systems.
Int. J. Emerg. Technol. Learn.
Mar Pérez-Sanagustín, Davinia Hernández Leo, Patricia Santos, Sergio Sayago, Josep Blat, Dai Griffiths
2008 B conf
Educational Patterns as a Guide to Create Units of Learning and Assessment.
ICALT
Davinia Hernández Leo, Patricia Santos, Eloy D. Villasclaras-Fernández, Toni Navarrete, Juan I. Asensio-Pérez, Josep Blat, Yannis A. Dimitriadis
2008 B conf
InstanceCollage: A Graphical Tool for the Particularization of Role/Group Structures in Pattern-Based IMS-LD Collaborative Scripts.
ICALT
Julio Alberto Hernández-Gonzalo, Eloy D. Villasclaras-Fernández, Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis
2008 B conf
Social Structures Representations as Aid for Effective Creation and Reuse of CSCL Scripts According to a Problem-Solving Approach to ID.
ICALT
Serena Alvino, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Davinia Hernández Leo
2008 B conf
Supporting Distance Learning Activities and Social Interaction: A Case Study.
ICALT
Ayman Moghnieh, Davinia Hernández Leo, Toni Navarrete, Patricia Santos, Josep Blat, Judith Schoonenboom
2008 J jnl
Supporting life-long competence development using the TENCompetence infrastructure: a first experiment.
Int. J. Emerg. Technol. Learn.
Judith Schoonenboom, Henk Sligte, Ayman Moghnieh, Davinia Hernández Leo, Krassen Stefanov, Christian Glahn, Marcus Specht, Ruud Lemmers
2007 J jnl
A Framework for the Conceptualization of Approaches to "Create-by-Reuse" of Learning Design Solutions.
J. Univers. Comput. Sci.
Davinia Hernández Leo, Andreas Harrer, Juan Manuel Dodero, Juan I. Asensio-Pérez, Daniel Burgos
2007 J jnl
Free- and Open-Source Software for a Course on Network Management: Authoring and Enactment of Scripts Based on Collaborative Learning Strategies.
IEEE Trans. Educ.
Davinia Hernández Leo, Miguel Luis Bote-Lorenzo, Juan Ignacio Asensio-Pérez, Eduardo Gómez-Sánchez, Eloy D. Villasclaras-Fernández, Iván M. Jorrín-Abellán, Yannis A. Dimitriadis
2007 — conf
From socially-mediated to technology-mediated coordination: a study of design tensions using group scribbles.
CSCL
Yannis A. Dimitriadis, Juan I. Asensio-Pérez, Davinia Hernández Leo, Jeremy Roschelle, John Brecht, Deborah G. Tatar, S. Raj Chaudhury, Chris DiGiano, Charles Patton
2007 — conf
Representing Computer-Supported Collaborative Learning Macro-scripts using IMS Learning Design.
EC-TEL (Posters)
Davinia Hernández Leo, Daniel Burgos, Colin Tattersall, Rob Koper
2006 J jnl
COLLAGE: A collaborative Learning Design editor based on patterns.
J. Educ. Technol. Soc.
Davinia Hernández Leo, Eloy D. Villasclaras-Fernández, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Iván M. Jorrín-Abellán, Inés Ruiz-Requies, Bartolomé Rubia-Avi
2006 B conf
CSCL Scripting Patterns: Hierarchical Relationships and Applicability.
ICALT
Davinia Hernández Leo, Eloy D. Villasclaras-Fernández, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Symeon Retalis
2006 B conf
Linking Collaborative Learning Practice with IMS LD and Service-Oriented Technologies: an Approach Based on Collaborative Learning Flow Patterns.
ICALT
Davinia Hernández Leo, Eloy D. Villasclaras-Fernández, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Miguel L. Bote-Lorenzo, Bartolomé Rubia-Avi
2006 B conf
Tuning IMS LD for Implementing a Collaborative Lifelong Learning Scenario.
ICALT
Davinia Hernández Leo, Eloy D. Villasclaras-Fernández, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Miguel L. Bote-Lorenzo, José Antonio Marcos-García
2005 J jnl
Computational Representation of Collaborative Learning Flow Patterns using IMS Learning Design.
J. Educ. Technol. Soc.
Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis
2005 C conf
The Opportunity of Grid Services for CSCL-Application Development.
PDP
Luis M. Vaquero-González, Davinia Hernández Leo, Federico Simmross-Wattenberg, Miguel L. Bote-Lorenzo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis, Eduardo Gómez-Sánchez, Guillermo Vega-Gorgojo
2004 — conf
A Tailorable Collaborative Learning System That Combines OGSA Grid Services and IMS-LD Scripting.
CRIWG
Miguel L. Bote-Lorenzo, Luis M. Vaquero-González, Guillermo Vega-Gorgojo, Yannis A. Dimitriadis, Juan I. Asensio-Pérez, Eduardo Gómez-Sánchez, Davinia Hernández Leo
2004 B conf
IMS Learning Design Support for the Formalization of Collaborative Learning Patterns.
ICALT
Davinia Hernández Leo, Juan I. Asensio-Pérez, Yannis A. Dimitriadis