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ACM Transactions on Information Systems (TOIS), Volume 33 Issue 2, February 2015

A Comparative Analysis of Interleaving Methods for Aggregated Search
Aleksandr Chuklin, Anne Schuth, Ke Zhou, Maarten De Rijke
Article No.: 5
DOI: 10.1145/2668120

A result page of a modern search engine often goes beyond a simple list of “10 blue links.” Many specific user needs (e.g., News, Image, Video) are addressed by so-called aggregated or vertical search solutions: specially presented...

Web Query Reformulation via Joint Modeling of Latent Topic Dependency and Term Context
Lidong Bing, Wai Lam, Tak-Lam Wong, Shoaib Jameel
Article No.: 6
DOI: 10.1145/2699666

An important way to improve users’ satisfaction in Web search is to assist them by issuing more effective queries. One such approach is query reformulation, which generates new queries according to the current query issued by users. A common...

TASC: A Transformation-Aware Soft Cascading Approach for Multimodal Video Copy Detection
Yonghong Tian, Mengren Qian, Tiejun Huang
Article No.: 7
DOI: 10.1145/2699662

How to precisely and efficiently detect near-duplicate copies with complicated audiovisual transformations from a large-scale video database is a challenging task. To cope with this challenge, this article proposes a transformation-aware soft...

Two-Stage Document Length Normalization for Information Retrieval
Seung-Hoon Na
Article No.: 8
DOI: 10.1145/2699669

The standard approach for term frequency normalization is based only on the document length. However, it does not distinguish the verbosity from the scope, these being the two main factors determining the document length. Because the verbosity and...

Unsupervised Visual and Textual Information Fusion in CBMIR Using Graph-Based Methods
Julien Ah-Pine, Gabriela Csurka, Stéphane Clinchant
Article No.: 9
DOI: 10.1145/2699668

Multimedia collections are more than ever growing in size and diversity. Effective multimedia retrieval systems are thus critical to access these datasets from the end-user perspective and in a scalable way. We are interested in repositories of...