activity
20112026
most citedpyUPMASK: an improved unsupervised clustering algorithm

61 citations · 114 across the 23 of their papers we have counts for

collaborators

24 papers

cs.IR2026

Beyond Retrieval: Scaffolding Children's Online Learning

Diletta Micol Tobia, Hrishita Chakrabarti, Maria Soledad Pera +1

Children increasingly turn to online information access systems that are primarily designed for the mainstream population, e.g., adults, but possess a limited understanding of how…

cs.IR2025

We're Still Doing It (All) Wrong: Recommender Systems, Fifteen Years Later

Alan Said, Maria Soledad Pera, Michael D. Ekstrand

In 2011, Xavier Amatriain sounded the alarm: recommender systems research was "doing it all wrong" [1]. His critique, rooted in statistical misinterpretation and methodological sho…

cs.HC2025★ 10 cited

Recommending With, Not For: Co-Designing Recommender Systems for Social Good

Michael D. Ekstrand, Afsaneh Razi, Aleksandra Sarcevic +3

Recommender systems are usually designed by engineers, researchers, designers, and other members of development teams. These systems are then evaluated based on goals set by the af…

cs.IR2025★ 4 cited

Impacts of Mainstream-Driven Algorithms on Recommendations for Children Across Domains: A Reproducibility Study

Robin Ungruh, Alejandro Bellogín, Dominik Kowald +1

Children are often exposed to items curated by recommendation algorithms. Yet, research seldom considers children as a user group, and when it does, it is anchored on datasets wher…

cs.IR2025★ 3 cited

De-centering the (Traditional) User: Multistakeholder Evaluation of Recommender Systems

Robin Burke, Gediminas Adomavicius, Toine Bogers +7

Multistakeholder recommender systems are those that account for the impacts and preferences of multiple groups of individuals, not just the end users receiving recommendations. Due…

cs.IR2024★ 3 cited

Ah, that's the great puzzle: On the Quest of a Holistic Understanding of the Harms of Recommender Systems on Children

Robin Ungruh, Maria Soledad Pera

Children come across various media items online, many of which are selected by recommender systems (RS) primarily designed for adults. The specific nature of the content selected b…

astro-ph.GA2023

The Unified Cluster Catalogue: towards a comprehensive and homogeneous database of stellar clusters

G. I. Perren, M. S. Pera, H. D. Navone +1

We introduce the Unified Cluster Catalogue, the largest catalogue of stellar clusters currently listing nearly 14000 objects. In this initial release it exclusively contains Milky…

cs.IR2023★ 2 cited

A Multi-Perspective Learning to Rank Approach to Support Children's Information Seeking in the Classroom

Garrett Allen, Katherine Landau Wright, Jerry Alan Fails +2

We introduce a novel re-ranking model that aims to augment the functionality of standard search engines to support classroom search activities for children (ages 6 to 11). This mod…

cs.CL2023

Conversational Agents and Children: Let Children Learn

Casey Kennington, Jerry Alan Fails, Katherine Landau Wright +1

Using online information discovery as a case study, in this position paper we discuss the need to design, develop, and deploy (conversational) agents that can -- non-intrusively --…

cs.IR2022★ 1 cited

Matching Consumer Fairness Objectives & Strategies for RecSys

Michael D. Ekstrand, Maria Soledad Pera

The last several years have brought a growing body of work on ensuring that recommender systems are in some sense consumer-fair -- that is, they provide comparable quality of servi…

cs.IR2022

Let's Learn from Children: Scaffolding to Enable Search as Learning in the Educational Environment

Monica Landoni, Maria Soledad Pera, Emiliana Murgia +1

In this manuscript, we argue for the need to further look at search as learning (SAL) with children as the primary stakeholders. Inspired by how children learn and considering the…

cs.HC2021

Using Conversational Artificial Intelligence to Support Children's Search in the Classroom

Garrett Allen, Jie Yang, Maria Soledad Pera +1

We present pathways of investigation regarding conversational user interfaces (CUIs) for children in the classroom. We highlight anticipated challenges to be addressed in order to…

cs.HC2021

The Impact of User Demographics and Task Types on Cross-App Mobile Search

Mohammad Aliannejadi, Fabio Crestani, Theo Huibers +3

Recent developments in the mobile app industry have resulted in various types of mobile apps, each targeting a different need and a specific audience. Consequently, users access di…

cs.IR2021★ 2 cited

To Infinity and Beyond! Accessibility is the Future for Kids' Search Engines

Ashlee Milton, Garrett Allen, Maria Soledad Pera

Research in the area of search engines for children remains in its infancy. Seminal works have studied how children use mainstream search engines, as well as how to design and eval…

cs.IR2021

All Together Now: Teachers as Research Partners in the Design of Search Technology for the Classroom

Emiliana Murgia, Monica Landoni, Theo Huibers +1

In the classroom environment, search tools are the means for students to access Web resources. The perspectives of students, researchers, and industry practitioners lead the ongoin…

cs.CY2021★ 1 cited

CASTing a Net: Supporting Teachers with Search Technology

Garrett Allen, Katherine Landau Wright, Jerry Alan Fails +2

Past and current research has typically focused on ensuring that search technology for the classroom serves children. In this paper, we argue for the need to broaden the research f…

astro-ph.GA2021★ 61 cited

pyUPMASK: an improved unsupervised clustering algorithm

M. S. Pera, G. I. Perren, A. Moitinho +2

Aims. We present pyUPMASK, an unsupervised clustering method for stellar clusters that builds upon the original UPMASK package. Its general approach makes it plausible to be applie…

cs.CY2020

A Canine Census to Influence Public Policy

Matias Apa, Maria Cecilia Faini, Mohammad Aliannejadi +1

The potential threat that domestic animals pose to the health of human populations tends to be overlooked. We posit that positive steps forward can be made in this area, via suitab…

cs.IR2020★ 2 cited

Evaluating Information Retrieval Systems for Kids

Ashlee Milton, Maria Soledad Pera

Evaluation of information retrieval systems (IRS) is a prominent topic among information retrieval researchers--mainly directed at a general population. Children require unique IRS…

cs.CL2020★ 2 cited

A Framework for Hierarchical Multilingual Machine Translation

Ion Madrazo Azpiazu, Maria Soledad Pera

Multilingual machine translation has recently been in vogue given its potential for improving machine translation performance for low-resource languages via transfer learning. Empi…

astro-ph.GA2020★ 21 cited

Sixteen overlooked open clusters in the fourth Galactic quadrant. A combined analysis of UBVI photometry and Gaia DR2 with ASteCA

G. I. Perren, E. E. Giorgi, A. Moitinho +3

Aims: This paper has two main objectives: (1) To determine the intrinsic properties of 16 faint and mostly unstudied open clusters in the poorly known sector of the Galaxy at 270$^…

cs.IR2018★ 1 cited

Can we leverage rating patterns from traditional users to enhance recommendations for children?

Ion Madrazo Azpiazu, Michael Green, Oghenemaro Anuyah +1

Recommender algorithms performance is often associated with the availability of sufficient historical rating data. Unfortunately, when it comes to children, this data is seldom ava…

cs.IR2018★ 1 cited

Who is Really Affected by Fraudulent Reviews? An analysis of shilling attacks on recommender systems in real-world scenarios

Anu Shrestha, Francesca Spezzano, Maria Soledad Pera

We present the results of an initial analysis conducted on a real-life setting to quantify the effect of shilling attacks on recommender systems. We focus on both algorithm perform…

cs.DB2011

Generating Exact- and Ranked Partially-Matched Answers to Questions in Advertisements

Rani Qumsiyeh, Maria S. Pera, Yiu-Kai Ng

Taking advantage of the Web, many advertisements (ads for short) websites, which aspire to increase client's transactions and thus profits, offer searching tools which allow users…