Book ChapterDOI
A framework and a language for on-line analytical processing on graphs
Seyed-Mehdi-Reza Beheshti,Boualem Benatallah,Hamid Reza Motahari-Nezhad,Mohammad Allahbakhsh +3 more
- pp 213-227
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TLDR
A graph data model, GOLAP, is proposed for online analytical processing on graphs that enables extending decision support on multidimensional networks considering both data objects and the relationships among them and extends SPARQL to support n-dimensional computations.Abstract:
Graphs are essential modeling and analytical objects for representing information networks. Existing approaches, in on-line analytical processing on graphs, took the first step by supporting multi-level and multi-dimensional queries on graphs, but they do not provide a semantic-driven framework and a language to support n-dimensional computations, which are frequent in OLAP environments. The major challenge here is how to extend decision support on multidimensional networks considering both data objects and the relationships among them. Moreover, one of the critical deficiencies of graph query languages, e.g. SPARQL, is the lack of support for n-dimensional computations. In this paper, we propose a graph data model, GOLAP, for online analytical processing on graphs. This data model enables extending decision support on multidimensional networks considering both data objects and the relationships among them. Moreover, we extend SPARQL to support n-dimensional computations. The approaches presented in this paper have been implemented on top of FPSPARQL, Folder-Path enabled extension of SPARQL, and experimentally validated on synthetic and real-world datasets.read more
Citations
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Proceedings ArticleDOI
Reputation management in crowdsourcing systems
Mohammad Allahbakhsh,Aleksandar Ignjatovic,Boualem Benatallah,Seyed-Mehdi-Reza Beheshti,Elisa Bertino,Norman Foo +5 more
TL;DR: A reputation management model is proposed which leverages the values of the tasks completed, the credibility of the evaluators of the results of the task and the time of evaluation of theresults of these tasks in order to calculate more dependable quality metrics for workers andevaluators.
Book ChapterDOI
Collusion Detection in Online Rating Systems
Mohammad Allahbakhsh,Aleksandar Ignjatovic,Boualem Benatallah,Seyed Mehdi Reza Beheshti,Elisa Bertino,Norman Foo +5 more
TL;DR: Impact of collusion in online rating systems and their susceptibility to collusion attacks are studied and the proposed model uses frequent itemset mining technique to detect candidate collusion groups and sub-groups are implemented.
Journal ArticleDOI
Scalable graph-based OLAP analytics over process execution data
TL;DR: A model for process OLAP (P-OLAP) is presented and OLAP specific abstractions in process context such as process cubes, dimensions, and cells are defined and a MapReduce-based graph processing engine is presented, to support big data analytics over process graphs.
Book ChapterDOI
Modeling and Querying Data Warehouses on the Semantic Web Using QB4OLAP
TL;DR: This paper extends the QB4OLAP RDF vocabulary to represent balanced, recursive, and ragged hierarchies, and shows how complex real-world OLAP queries expressed in SPARQL can be posed to the resulting QB4 OLAP model.
Journal ArticleDOI
Towards Cognitive Recommender Systems
Amin Beheshti,Shahpar Yakhchi,Salman Mousaeirad,Seyed Mohssen Ghafari,Srinivasa Reddy Goluguri,Mohammad Amin Edrisi +5 more
TL;DR: Cognitive Recommender Systems will be the new type of intelligent Recommender systems that understand the user’s preferences, detect changes in user preferences over time, predict user�'s unknown favorites, and explore adaptive mechanisms to enable intelligent actions within the compound and changing environments.
References
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Journal ArticleDOI
An overview of data warehousing and OLAP technology
Surajit Chaudhuri,Umeshwar Dayal +1 more
TL;DR: An overview of data warehousing and OLAP technologies, with an emphasis on their new requirements, is provided, based on a tutorial presented at the VLDB Conference, 1996.
Journal ArticleDOI
The dynamics of viral marketing
TL;DR: While on average recommendations are not very effective at inducing purchases and do not spread very far, this work presents a model that successfully identifies communities, product, and pricing categories for which viral marketing seems to be very effective.
BookDOI
The Semantic Web: Research and Applications
TL;DR: DODDLE-R, a support environment for user-centered ontology development, consists of two main parts: pre-processing part and quality improvement part, which generates a prototype ontology semi-automatically and supports the refinement of it interactively.
Book
The Semantic Web: Research and Applications
Lora Aroyo,Grigoris Antoniou,Eero Hyvönen,Annette ten Teije,Heiner Stuckenschmidt,Liliana Cabral,Tania Tudorache +6 more
Book ChapterDOI
Evaluation Measures for Multi-class Subgroup Discovery
Tarek Abudawood,Peter A. Flach +1 more
TL;DR: The usefulness of multi-class subgroup discovery is demonstrated experimentally, using discovered subgroups as features for a decision tree learner, and significant improvements in accuracy and AUC are achieved with particular evaluation measures and settings.