Flexibly Interleaving Processes. - Erica Melis; Carsten Ullrich (ICCBR, 1999)

Proof Development with OMEGA. - Jörg H. Siekmann; Christoph Benzmüller; Vladimir Brezhnev; Lassaad Cheikhrouhou; Armin Fiedler; Andreas Franke 001; Helmut Horacek; Michael Kohlhase; Andreas Meier 002; Erica Melis; Markus Moschner; Immanuel Normann; et al. (CADE, 2002)

Using Computer Algebra Systems as Cognitive Tools. - Jochen Büdenbender; Adrian Frischauf; Georgi Goguadze; Erica Melis; Paul Libbrecht; Carsten Ullrich (Intelligent Tutoring Systems, 2002)

Semantics for Web-Based Mathematical Education Systems. - Erica Melis; Jochen Büdenbender; Georgi Goguadze; Paul Libbrecht; Carsten Ullrich (Semantic Web Workshop, 2002)

An Efficient Presentation-Architecture for Personalized Content. - Paul Libbrecht; Carsten Ullrich; Stefan Winterstein (Berliner XML Tage, 2003)

An Instructional Component for Dynamic Course Generation and Delivery. - Carsten Ullrich (Berliner XML Tage, 2003)

Problems and Solutions for Markup for Mathematical Examples and Exercises. - Georgi Goguadze; Erica Melis; Carsten Ullrich; Paul A. Cairns (MKM, 2003)

A Presentation Architecture for Individualized Content. - Alberto González Palomo; Paul Libbrecht; Carsten Ullrich (WWW (Posters), 2003)

Knowledge Representation and Management in ACTIVEMATH. - Erica Melis; Jochen Büdenbender; Georgi Goguadze; Paul Libbrecht; Carsten Ullrich (Ann. Math. Artif. Intell., 2003)

Wissensmodellierung und -nutzung in ActiveMath. - Erica Melis; Georgi Goguadze; Paul Libbrecht; Carsten Ullrich (Künstliche Intell., 2003)

Gender-Biased Adaptations in Educational Adaptive Hypermedia. - Erica Melis; Carsten Ullrich (AH, 2004)

A Flexible and Efficient Presentation-Architecture for Adaptive Hypermedia: Description and Technical Evaluation. - Carsten Ullrich; Paul Libbrecht; Stefan Winterstein; Martin Mühlenbrock (ICALT, 2004)

Tutorial Planning: Adapting Course Generation to Today's Needs. - Carsten Ullrich (AIED, 2005)

Challenges in Search and Usage of Multi-media Learning Objects. - Erica Melis; Ruimin Shen; Jörg H. Siekmann; Carsten Ullrich; Fan Yang 003; Peng Han 006 (Cognitive Systems, 2005)

Course Generation Based on HTN Planning. - Carsten Ullrich (LWA, 2005)

Authoring Presentation for OpenMath. - Shahid Manzoor; Paul Libbrecht; Carsten Ullrich; Erica Melis (MKM, 2005)

Integrating Learning Object Repositories Using a Mediator Architecture. - Philipp Kärger; Carsten Ullrich; Erica Melis (EC-TEL, 2006)

Querying Heterogeneous and Distributed Learning Object Repositories via Ontology-Based Mediation. - Philipp Kärger; Erica Melis; Carsten Ullrich (ICALT, 2006)

Combining ITS and eLearning Technologies: Opportunities and Challenges. - Christopher A. Brooks 001; Jim E. Greer; Erica Melis; Carsten Ullrich (Intelligent Tutoring Systems, 2006)

Challenges and Solutions for Hierarchical Task Network Planning in E-Learning. - Carsten Ullrich; Okhtay Ilghami (STAIRS, 2006)

Semantic-aware components and services of ActiveMath. - Erica Melis; Giorgi Goguadze; Martin Homik; Paul Libbrecht; Carsten Ullrich; Stefan Winterstein (Br. J. Educ. Technol., 2006)

Investigating the Reuse of Course Generation Knowledge. - Carsten Ullrich; Qinghua Chen; Sushing Chen; Liping Shen; Ruimin Shen (ICCE, 2007)

Multimedia-Learning in a Life Science Workflow Environment. - Carsten Ullrich; Ruimin Shen; Su-Shing Chen (PCM, 2007)

Course generation as a hierarchical task network planning problem. - Carsten Ullrich (2007)

Educational Services in the ACTIVEMATH Learning Environment. - Carsten Ullrich; Paul Libbrecht (The Learning Grid Handbook, 2008)

Pedagogically Founded Courseware Generation for Web-Based Learning, An HTN-Planning-Based Approach Implemented in PAIGOS - Carsten Ullrich (Springer, 2008)

On Solving QoS-Aware Service Selection Problem with Service Composition. - Changlin Wan; Carsten Ullrich; Limin Chen; Rui Huang; Jiewen Luo; Zhongzhi Shi (GCC, 2008)

Why web 2.0 is good for learning and for research: principles and prototypes. - Carsten Ullrich; Kerstin Borau; Heng Luo; Xiaohong Tan; Liping Shen; Ruimin Shen (WWW, 2008)

Course Generation as a Hierarchical Task Network Planning Problem. - Carsten Ullrich (Künstliche Intell., 2008)

A collaborative filtering framework based on both local user similarity and global user similarity. - Heng Luo; Changyong Niu; Ruimin Shen; Carsten Ullrich (Mach. Learn., 2008)

ACTIVEMATH - a Learning Platform With Semantic Web Features. - Erica Melis; Giorgi Goguadze; Paul Libbrecht; Carsten Ullrich (Semantic Web Technologies for e-Learning, 2009)

A New Framework for Dynamic Adaptations and Actions. - Carsten Ullrich; Tianxiang Lu; Erica Melis (EC-TEL, 2009)

Microblogging for Language Learning: Using Twitter to Train Communicative and Cultural Competence. - Kerstin Borau; Carsten Ullrich; Jinjin Feng; Ruimin Shen (ICWL, 2009)

Just-in-Time Adaptivity through Dynamic Items. - Carsten Ullrich; Tianxiang Lu; Erica Melis (UMAP, 2009)

Culturally adapted mathematics education with ActiveMath. - Erica Melis; Georgi Goguadze; Paul Libbrecht; Carsten Ullrich (AI Soc., 2009)

Pedagogically founded courseware generation based on HTN-planning. - Carsten Ullrich; Erica Melis (Expert Syst. Appl., 2009)

Who Students Interact With? A Social Network Analysis Perspective on the Use of Twitter in Language Learning. - Carsten Ullrich; Kerstin Borau; Karen Stepanyan (EC-TEL, 2010)

A Social Network Analysis Perspective on Student Interaction within the Twitter Microblogging Environment. - Karen Stepanyan; Kerstin Borau; Carsten Ullrich (ICALT, 2010)

The Design and Application of an Automatic Course Generation System for Large-Scale Education. - Xiaohong Tan; Carsten Ullrich; Yan Wang; Ruimin Shen (ICALT, 2010)

Gap Detection in Web-Based Adaptive Educational Systems. - Dominik Jednoralski; Erica Melis; Sergey A. Sosnovsky; Carsten Ullrich (ICWL, 2010)

Using Social Software for Teamwork and Collaborative Project Management in Higher Education. - Na Li 010; Carsten Ullrich; Sandy El Helou; Denis Gillet (ICWL, 2010)

Supporting Flexible Competency Frameworks. - Erica Melis; Arndt Faulhaber; Ahmad Salim Doost; Carsten Ullrich (ICWL, 2010)

Requirements of Chinese Teachers for Online Student Tracking and a Comparison to Their Western Counterparts. - Xiaohong Tan; Carsten Ullrich; Oliver Scheuer; Erica Melis; Ruimin Shen (ICWL Workshops, 2010)

Cross-Cultural Multimedia Language Learning: Case Study and Analysis. - Carsten Ullrich; Kerstin Borau; Scott Grant; Daniel Jackson 004; Ruimin Shen (ICWL, 2010)

Not Yet Ready for Everyone: An Experience Report about a Personal Learning Environment for Language Learning. - Carsten Ullrich; Ruimin Shen; Denis Gillet (ICWL, 2010)

Complex Course Generation Adapted to Pedagogical Scenarios and its Evaluation. - Carsten Ullrich; Erica Melis (J. Educ. Technol. Soc., 2010)

Resisting free-riding behavior in BitTorrent. - Jian Wang 070; Ruimin Shen; Carsten Ullrich; Heng Luo; Changyong Niu (Future Gener. Comput. Syst., 2010)

A Mobile Live Video Learning System for Large-Scale Learning—System Design and Evaluation. - Carsten Ullrich; Ruimin Shen; Ren Tong; Xiaohong Tan (IEEE Trans. Learn. Technol., 2010)

Sparse Group Restricted Boltzmann Machines. - Heng Luo; Ruimin Shen; Changyong Niu; Carsten Ullrich (AAAI, 2011)

Towards Responsive Open Learning Environments: The ROLE Interoperability Framework. - Sten Govaerts; Katrien Verbert; Daniel Dahrendorf; Carsten Ullrich; Manuel Schmidt; Michael Werkle; Arunangsu Chatterjee; Alexander Nussbaumer; Dominik Renzel; Maren Scheffel; Martin Friedrich; José Luís Santos; et al. (EC-TEL, 2011)

Learning Class-relevant Features and Class-irrelevant Features via a Hybrid third-order RBM. - Heng Luo; Ruimin Shen; Changyong Niu; Carsten Ullrich (AISTATS, 2011)

Early Results of Experiments with Responsive Open Learning Environments. - Martin Friedrich; Martin Wolpers; Ruimin Shen; Carsten Ullrich; Ralf Klamma; Dominik Renzel; Anja Richert; Bodo von der Heiden (J. Univers. Comput. Sci., 2011)

From LMS to PLE: A Step Forward through OpenSocial Apps in Moodle. - Evgeny Bogdanov; Carsten Ullrich; Erik Isaksson; Matthias Palmér; Denis Gillet (ICWL, 2012)

Learning from Learning Objects and Their Repositories to Create Sustainable Educational App Environments. - Carsten Ullrich; Ruimin Shen; Kerstin Borau (ICALT, 2013)

Analyzing Student Viewing Patterns in Lecture Videos. - Carsten Ullrich; Ruimin Shen; Weikai Xie (ICALT, 2013)

A Rapid Authoring Tool for Converting Existing Online Resources into Widgets. - Lujia Zhang; Carsten Ullrich; Ruimin Shen (ICALT, 2013)

Towards PLEs throughwidget spaces in Moodle. - Evgeny Bogdanov; Carsten Ullrich; Erik Isaksson; Matthias Palmér; Denis Gillet (Comput. Sci. Inf. Syst., 2014)

Modeling Children's Pedestrian Safety Skills in an Intelligent Virtual Reality Learning Environment. - Yecheng Gu; Sergey A. Sosnovsky; Carsten Ullrich (AIED, 2015)

Digitale Lernszenarien zur ganzheitlichen Unterstützung von Mitarbeitern im Arbeitsalltag. - Sebastian Freith; Glenn Schütze; Carsten Ullrich; Stefan Welling; Dieter Kreimeier; Bernd Kuhlenkötter (DeLFI WOrkshops, 2015)

Assistenz- und Wissensdienste für den Shopfloor. - Carsten Ullrich; Matthias Aust; Roland Blach; Michael Dietrich; Christoph Igel; Niklas Kreggenfeld; Denise Kahl; Christopher Prinz; Simon Schwantzer (DeLFI WOrkshops, 2015)

SafeChild: An Intelligent Virtual Reality Environment for Training Pedestrian Safety Skills. - Yecheng Gu; Sergey A. Sosnovsky; Carsten Ullrich (EC-TEL, 2015)

Assistance- and knowledge-services for smart production. - Carsten Ullrich; Matthias Aust; Niklas Kreggenfeld; Denise Kahl; Christopher Prinz; Simon Schwantzer (I-KNOW, 2015)

Implementierung eines Aufnahmewerkzeugs für die semi-automatische Erstellung von Lernszenarien. - Glenn Schütze; Ines Averbeck; Julia Finken; Sebastian Freith; Carsten Ullrich (DeLFI Workshops, 2016)

APPsist Statusbericht: Realisierung einer Plattform für Assistenz- und Wissensdienste für die Industrie 4.0. - Carsten Ullrich; Matthias Aust; Michael Dietrich; Nico Herbig 001; Christoph Igel; Niklas Kreggenfeld; Christopher Prinz; Frederic Raber; Simon Schwantzer; Frank Sulzmann (DeLFI Workshops, 2016)

Vorgehensmodell zur Identifikation, Aufnahme und Aufbereitung von Prozesswissen in der Industrie 4.0. - Niklas Kreggenfeld; Christopher Prinz; Carsten Ullrich; Bernd Kuhlenkötter (DeLFI, 2017)

Supporting Awareness and Reflection in Companies to Move towards Industry 4.0. - Milos Kravcik; Carsten Ullrich; Christoph Igel (ARTEL@EC-TEL, 2017)

Towards Competence Development for Industry 4.0. - Milos Kravcik; Xia Wang 003; Carsten Ullrich; Christoph Igel (AIED (2), 2018)

Property and the cloud. - Cesare Bartolini; Cristiana Santos; Carsten Ullrich (Comput. Law Secur. Rev., 2018)

A risk-based approach towards infringement prevention on the internet: adopting the anti-money laundering framework to online platforms. - Carsten Ullrich (Int. J. Law Inf. Technol., 2018)