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ACM Transactions on Information Systems (TOIS), Volume 24 Issue 1, January 2006

Detection of video sequences using compact signatures
Justin Zobel, Timothy C. Hoad
Pages: 1-50
DOI: 10.1145/1125857.1125858
Digital representations are widely used for audiovisual content, enabling the creation of large online repositories of video, allowing access such as video on demand. However, the ease of copying and distribution of digital video makes piracy a...

Boosting the performance of Web search engines: Caching and prefetching query results by exploiting historical usage data
Tiziano Fagni, Raffaele Perego, Fabrizio Silvestri, Salvatore Orlando
Pages: 51-78
DOI: 10.1145/1125857.1125859
This article discusses efficiency and effectiveness issues in caching the results of queries submitted to a Web search engine (WSE). We propose SDC (Static Dynamic Cache), a new caching strategy aimed to efficiently exploit the temporal and spatial...

A space-partitioning-based indexing method for multidimensional non-ordered discrete data spaces
Gang Qian, Qiang Zhu, Qiang Xue, Sakti Pramanik
Pages: 79-110
DOI: 10.1145/1125857.1125860
There is an increasing demand for similarity searches in a multidimensional non-ordered discrete data space (NDDS) from application areas such as bioinformatics and data mining. The non-ordered and discrete nature of an NDDS raises new challenges for...

Summary in context: Searching versus browsing
Daniel M. McDonald, Hsinchun Chen
Pages: 111-141
DOI: 10.1145/1125857.1125861
The use of text summaries in information-seeking research has focused on query-based summaries. Extracting content that resembles the query alone, however, ignores the greater context of the document. Such context may be central to the purpose and...

TOIS reviewers 2003--2005
Gary Marchionini
Pages: 142-143
DOI: 10.1145/1125857.1125862