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ACM Transactions on Information Systems (TOIS), Volume 32 Issue 2, April 2014

Efficient Index-Based Snippet Generation
Hannah Bast, Marjan Celikik
Article No.: 6
DOI: 10.1145/2590972

Ranked result lists with query-dependent snippets have become state of the art in text search. They are typically implemented by searching, at query time, for occurrences of the query words in the top-ranked documents. This document-based...

Modeling Term Associations for Probabilistic Information Retrieval
Jiashu Zhao, Jimmy Xiangji Huang, Zheng Ye
Article No.: 7
DOI: 10.1145/2590988

Traditionally, in many probabilistic retrieval models, query terms are assumed to be independent. Although such models can achieve reasonably good performance, associations can exist among terms from a human being’s point of view. There are...

Social-Sensed Image Search
Peng Cui, Shao-Wei Liu, Wen-Wu Zhu, Huan-Bo Luan, Tat-Seng Chua, Shi-Qiang Yang
Article No.: 8
DOI: 10.1145/2590974

Although Web search techniques have greatly facilitate users’ information seeking, there are still quite a lot of search sessions that cannot provide satisfactory results, which are more serious in Web image search scenarios. How to...

Theoretical, Qualitative, and Quantitative Analyses of Small-Document Approaches to Resource Selection
Ilya Markov, Fabio Crestani
Article No.: 9
DOI: 10.1145/2590975

In a distributed retrieval setup, resource selection is the problem of identifying and ranking relevant sources of information for a given user’s query. For better usage of existing resource-selection techniques, it is desirable to know what...