This, the

24th issue of Transactions on Large-Scale Data- and Knowledge-Centered Systems,

contains extended and revised versions of seven papers presented at the 25th

International Conference on Database and Expert Systems Applications, DEXA

2014, held in Munich, Germany, in September 2014. Following the conference, and

two further rounds of reviewing and selection, six extended papers and one

invited keynote paper were chosen for inclusion in this special issue. Topics

covered include systems modeling, similarity search, bioinformatics, data

pricing, knearest neighbor querying, database replication, and data

anonymization.