Carsten Ullrich

Why web 2.0 is good for learning and for research

Carsten Ullrich, Kerstin Borau, Heng Luo et al. · 2008 · 245 citations

E-learning, Web Literacy, Web 2.0 +14

A collaborative filtering framework based on both local user similarity and global user similarity

Heng Luo, Changyong Niu, Ruimin Shen et al. · Machine Learning · 2008 · 88 citations · Full text

Local User Similarity, Group Recommenders, Engineering +9

Semantic‐aware components and services of ActiveMath

Erica Melis⋆, Giorgi Goguadze, Martin Homik et al. · British Journal of Educational Technology · 2006 · 66 citations

Engineering, Content Markup, Semantic Technology +19

A Mobile Live Video Learning System for Large-Scale Learning—System Design and Evaluation

Carsten Ullrich, Ruimin Shen, Tong Ren et al. · IEEE Transactions on Learning Technologies · 2010 · 63 citations

Mobile Live Video, Large-scale Learning—system Design, Interactive Learning +15

A Social Network Analysis Perspective on Student Interaction within the Twitter Microblogging Environment

Karen Stepanyan, Kerstin Borau, Carsten Ullrich · 2010 · 60 citations

Engineering, Social Medium Monitoring, Learning Network +18