3 citations · 4 across the 2 of their papers we have counts for
4 papers · 1 filter
Tracking Behavioral Patterns among Students in an Online Educational System
Stephan Lorenzen, Niklas Hjuler, Stephen Alstrup
Analysis of log data generated by online educational systems is an essential task to better the educational systems and increase our understanding of how students learn. In this st…
Revisiting Wedge Sampling for Budgeted Maximum Inner Product Search
Stephan S. Lorenzen, Ninh Pham
Top-k maximum inner product search (MIPS) is a central task in many machine learning applications. This paper extends top-k MIPS with a budgeted setting, that asks for the best app…
Investigating Writing Style Development in High School
Stephan Lorenzen, Niklas Hjuler, Stephen Alstrup
In this paper we do the first large scale analysis of writing style development among Danish high school students. More than 10K students with more than 100K essays are analyzed. W…
Detecting Ghostwriters in High Schools
Magnus Stavngaard, August Sørensen, Stephan Lorenzen +2
Students hiring ghostwriters to write their assignments is an increasing problem in educational institutions all over the world, with companies selling these services as a product.…