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ACM Transactions on Information Systems (TOIS), Volume 30 Issue 2, May 2012

Approaches to Exploring Category Information for Question Retrieval in Community Question-Answer Archives
Xin Cao, Gao Cong, Bin Cui, Christian S. Jensen, Quan Yuan
Article No.: 7
DOI: 10.1145/2180868.2180869

Community Question Answering (CQA) is a popular type of service where users ask questions and where answers are obtained from other users or from historical question-answer pairs. CQA archives contain large volumes of questions organized into a...

A Probabilistic Model to Combine Tags and Acoustic Similarity for Music Retrieval
Riccardo Miotto, Nicola Orio
Article No.: 8
DOI: 10.1145/2180868.2180870

The rise of the Internet has led the music industry to a transition from physical media to online products and services. As a consequence, current online music collections store millions of songs and are constantly being enriched with new content....

Peer-to-Peer Information Retrieval: An Overview
Almer S. Tigelaar, Djoerd Hiemstra, Dolf Trieschnigg
Article No.: 9
DOI: 10.1145/2180868.2180871

Peer-to-peer technology is widely used for file sharing. In the past decade a number of prototype peer-to-peer information retrieval systems have been developed. Unfortunately, none of these has seen widespread real-world adoption and thus, in...

Exploring Question Selection Bias to Identify Experts and Potential Experts in Community Question Answering
Aditya Pal, F. Maxwell Harper, Joseph A. Konstan
Article No.: 10
DOI: 10.1145/2180868.2180872

Community Question Answering (CQA) services enable their users to exchange knowledge in the form of questions and answers. These communities thrive as a result of a small number of highly active users, typically called experts, who provide...

Predicting Query Performance by Query-Drift Estimation
Anna Shtok, Oren Kurland, David Carmel, Fiana Raiber, Gad Markovits
Article No.: 11
DOI: 10.1145/2180868.2180873

Predicting query performance, that is, the effectiveness of a search performed in response to a query, is a highly important and challenging problem. We present a novel approach to this task that is based on measuring the standard deviation...

Authorship Attribution Based on Specific Vocabulary
Jacques Savoy
Article No.: 12
DOI: 10.1145/2180868.2180874

In this article we propose a technique for computing a standardized Z score capable of defining the specific vocabulary found in a text (or part thereof) compared to that of an entire corpus. Assuming that the term occurrence follows a binomial...

Oracle in Image Search: A Content-Based Approach to Performance Prediction
Liqiang Nie, Meng Wang, Zheng-Jun Zha, Tat-Seng Chua
Article No.: 13
DOI: 10.1145/2180868.2180875

This article studies a novel problem in image search. Given a text query and the image ranking list returned by an image search system, we propose an approach to automatically predict the search performance. We demonstrate that, in order to...

A Measurement Framework for Evaluating Emulators for Digital Preservation
Mark Guttenbrunner, Andreas Rauber
Article No.: 14
DOI: 10.1145/2180868.2180876

Accessible emulation is often the method of choice for maintaining digital objects, specifically complex ones such as applications, business processes, or electronic art. However, validating the emulator’s ability to faithfully reproduce the...