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ACM Transactions on

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Latest Articles

Attentive Aspect Modeling for Review-Aware Recommendation

In recent years, many studies extract aspects from user reviews and integrate them with ratings for improving the recommendation performance. The... (more)

On Annotation Methodologies for Image Search Evaluation

Image search engines differ significantly from general web search engines in the way of presenting search results. The difference leads to different... (more)

Using Collection Shards to Study Retrieval Performance Effect Sizes

Despite the bulk of research studying how to more accurately compare the performance of IR systems, less attention is devoted to better understanding... (more)

Personalised Reranking of Paper Recommendations Using Paper Content and User Behavior

Academic search engines have been widely used to access academic papers, where users’ information needs are explicitly represented as search... (more)

Exploring High-Order User Preference on the Knowledge Graph for Recommender Systems

To address the sparsity and cold-start problem of collaborative filtering, researchers usually make use of side information, such as social networks... (more)

Deep Item-based Collaborative Filtering for Top-N Recommendation

Item-based Collaborative Filtering (ICF) has been widely adopted in recommender systems in industry, owing to its strength in user interest modeling... (more)

Does Diversity Affect User Satisfaction in Image Search

Diversity has been taken into consideration by existing Web image search engines in ranking search results. However, there is no thorough... (more)

The Effects of Working Memory, Perceptual Speed, and Inhibition in Aggregated Search

Prior work has studied how different characteristics of individual users (e.g., personality traits and cognitive abilities) can impact search... (more)

Funnelling: A New Ensemble Method for Heterogeneous Transfer Learning and Its Application to Cross-Lingual Text Classification

Cross-lingual Text Classification (CLC) consists of automatically classifying, according to a common set C of classes, documents each written in one of a set of languages L, and doing so more accurately than when “naïvely” classifying each document via its corresponding language-specific classifier. To obtain an increase in... (more)

Search Result Reranking with Visual and Structure Information Sources

Relevance estimation is among the most important tasks in the ranking of search results. Current methodologies mainly concentrate on text matching,... (more)

NEWS

Call for Special Issue Proposals

ACM Transactions on Information Systems (TOIS) invites proposals for a special issue of the journal devoted to any topic in information retrieval. Click here to see more details.

New options for ACM authors to manage rights and permissions for their work

 

ACM introduces a new publishing license agreement, an updated copyright transfer agreement, and a new authorpays option which allows for perpetual open access through the ACM Digital Library. For more information, visit the ACM Author Rights webpage.

 

About TOIS

ACM Transactions on Information Systems (TOIS) is a scholarly journal that publishes previously unpublished high-quality scholarly articles in all areas of information retrieval. TOIS is published quarterly.

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Forthcoming Articles
Boosting Search Performance Using Query Variations

Rank fusion is a powerful technique that allows multiple sources of information to be combined into a single result set. However, to date fusion has not been regarded as being cost-effective in cases where strict per- query efficiency guarantees are required, such as in web search. In this work we propose a novel solution to rank fusion by splitting the computation into two parts ? one phase that is carried out offline to generate pre-computed centroid answers for queries with broadly similar information needs, and then a second online phase that uses the corresponding topic centroid to compute a result page for each query. We explore efficiency improvements to classic fusion algorithms whose costs can be amortized as a pre-processing step, and can then be combined with re-ranking approaches to dramatically improve effectiveness in multi-stage retrieval systems with little efficiency overhead at query time. Experimental results using the ClueWeb12B collection and the UQV100 query variations demonstrate that centroid-based approaches allow improved retrieval effectiveness at little or no loss in query throughput or latency, and with reasonable pre-processing requirements. We additionally show that queries that do not match any of the pre-computed clusters can be accurately identified and efficiently processed in our proposed ranking pipeline.

Joint Neural Collaborative Filtering for Recommender Systems

We propose a Joint Neural Collaborative Filtering (J-NCF) method for recommender systems. The J-NCF model applies a joint neural network that couples deep feature learning and deep interaction modeling with a rating matrix. Deep feature learning extracts feature representations of users and items with a deep learning architecture based on a user-item rating matrix. Deep interaction modeling captures non-linear user-item interactions with a deep neural network using the feature representations generated by the deep feature learning process as input. J-NCF enables the deep feature learning and deep interaction modeling processes to optimize each other through joint training, which can improve recommendation performance. Additionally, we design a new loss function for optimization, which takes both implicit and explicit feedback, point-wise and pair-wise loss into account. Experiments on several datasets show significant improvements of J-NCF over state-of-the-art methods, with improvements of 8.24% on the MovieLens 100K dataset, 10.81% on the MovieLens 1M dataset, and 10.21% on the Amazon Movies dataset in terms of HR@10. NDCG@10 improvements are 12.42%, 14.24% and 15.06%, respectively. We conduct experiments to evaluate the scalability and sensitivity of J-NCF. Our experiments show J-NCF has a competitive performance on sparse datasets and inactive users compared to state-of-the-art baselines.

Question Answering in Knowledge Bases: A Verification Assisted Model with Iterative Training

Question answering over knowledge base (KB-QA) aims to take full advantage of the knowledge in knowledge bases with the ultimate purpose of returning answers to questions. To access the substantial knowledge within the KB, many model architectures are hindered by the bottleneck of accurately predicting relations which connect subject entities to object entities. To break the bottleneck, this paper presents a novel framework which can be viewed as an extension to APVA-TURBO. Experimental results show a boost in performance to the APVA-TURBO approach and outperform other question answering approaches.

Offline versus Online Representation Learning of Documents Using External Knowledge

An intensive recent research work investigated the combined use of hand-curated knowledge sources and corpus-driven sources to learn effective text representations. The overall learning process could be run by online revising the learning objective or by offline refining an original learned representation. The differentiated impact of each of the learning approaches on the quality of the learned representations has not been so far studied in the literature. This article focuses on the design of comparable offline vs. online knowledge-enhanced document representation learning models and the comparison of their effectiveness using a set of standard IR and NLP downstream tasks. The results of quantitative and qualitative analyses show that 1) offline vs. online learning approaches have dissimilar results trends regarding the task as well as the dataset distribution counts with regard to domain application; 2) while considering relational semantics is undoubtedly beneficial, the way used to express relational constraints could affect semantic inference effectiveness. The findings of this work present opportunities for the design of future representation learning models, but also for providing insights about the evaluation of such models.

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