42 citations · 142 across the 26 of their papers we have counts for
6 papers · 1 filter
Fairness in Rankings and Recommendations: An Overview
Evaggelia Pitoura, Kostas Stefanidis, Georgia Koutrika
We increasingly depend on a variety of data-driven algorithmic systems to assist us in many aspects of life. Search engines and recommender systems amongst others are used as sourc…
Flow Computation in Temporal Interaction Networks
Chrysanthi Kosyfaki, Nikos Mamoulis, Evaggelia Pitoura +1
Temporal interaction networks capture the history of activities between entities along a timeline. At each interaction, some quantity of data (money, information, kbytes, etc.) flo…
On Measuring Bias in Online Information
Evaggelia Pitoura, Panayiotis Tsaparas, Giorgos Flouris +4
Bias in online information has recently become a pressing issue, with search engines, social networks and recommendation services being accused of exhibiting some form of bias. In…
Rapid AkNN Query Processing for Fast Classification of Multidimensional Data in the Cloud
Nikolaos Nodarakis, Spyros Sioutas, Dimitrios Tsoumakos +2
A -nearest neighbor (NN) query determines the nearest points, using distance metrics, from a specific location. An all -nearest neighbor (ANN) query constitutes a v…
On Graph Deltas for Historical Queries
Georgia Koloniari, Dimitris Souravlias, Evaggelia Pitoura
In this paper, we address the problem of evaluating historical queries on graphs. To this end, we investigate the use of graph deltas, i.e., a log of time-annotated graph operation…
DisC Diversity: Result Diversification based on Dissimilarity and Coverage
Marina Drosou, Evaggelia Pitoura
Recently, result diversification has attracted a lot of attention as a means to improve the quality of results retrieved by user queries. In this paper, we propose a new, intuitive…