• Publications
  • Influence
Scalable Semantic Web Data Management Using Vertical Partitioning
TLDR
The results show that a vertical partitioned schema achieves similar performance to the property table technique while being much simpler to design, and if a column-oriented DBMS is used instead of a row-oriented database, another order of magnitude performance improvement is observed, with query times dropping from minutes to several seconds.
SW-Store: a vertically partitioned DBMS for Semantic Web data management
TLDR
The results show that a vertically partitioned schema achieves similar performance to the property table technique while being much simpler to design, and the architecture of SW-Store, a new DBMS that implements these techniques to achieve high performance RDF data management.
The Impact of Increased Awareness While Face-to-Face
TLDR
Second Messenger, a system of dynamic awareness displays that reveal speaker participation patterns in a face-to-face discussion, is presented, suggesting that awareness applications bring about systematic changes in group communication styles.
Visualizing Activity on Wikipedia with Chromograms
TLDR
To analyze the huge edit histories of the site's administrators, a visualization technique, the chromogram, is introduced that can display very long textual sequences through a simple color coding scheme.
Using The Barton Libraries Dataset As An RDF benchmark
This report describes the Barton Libraries RDF dataset and Longwell query benchmark that we use for our recent VLDB paper on Scalable Semantic Web Data Management Using Vertical Partitioning [4].
Using visualizations to review a group's interaction dynamics
We present a visualization system for reviewing the turn-taking patterns in a face-to-face meeting. Without the need to directly observe a group, a user can use the system to gain insight into the