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ACM Transactions on Information Systems (TOIS), Volume 36 Issue 1, April 2017

Clustered Elias-Fano Indexes
Giulio Ermanno Pibiri, Rossano Venturini
Article No.: 2
DOI: 10.1145/3052773

State-of-the-art encoders for inverted indexes compress each posting list individually. Encoding clusters of posting lists offers the possibility of reducing the redundancy of the lists while maintaining a noticeable query processing...

Unifying Virtual and Physical Worlds: Learning Toward Local and Global Consistency
Xiang Wang, Liqiang Nie, Xuemeng Song, Dongxiang Zhang, Tat-Seng Chua
Article No.: 4
DOI: 10.1145/3052774

Event-based social networking services, such as Meetup, are capable of linking online virtual interactions to offline physical activities. Compared to mono online social networking services (e.g., Twitter and Google+), such dual networks provide a...