Search Results for author: Alejandro Bellogín

Found 12 papers, 4 papers with code

Understanding the Influence of Data Characteristics on the Performance of Point-of-Interest Recommendation Algorithms

no code implementations13 Nov 2023 Linus W. Dietz, Pablo Sánchez, Alejandro Bellogín

The performance of recommendation algorithms is closely tied to key characteristics of the data sets they use, such as sparsity, popularity bias, and preference distributions.

Challenging the Myth of Graph Collaborative Filtering: a Reasoned and Reproducibility-driven Analysis

1 code implementation1 Aug 2023 Vito Walter Anelli, Daniele Malitesta, Claudio Pomo, Alejandro Bellogín, Tommaso Di Noia, Eugenio Di Sciascio

The success of graph neural network-based models (GNNs) has significantly advanced recommender systems by effectively modeling users and items as a bipartite, undirected graph.

Collaborative Filtering Recommendation Systems

Reenvisioning Collaborative Filtering vs Matrix Factorization

1 code implementation28 Jul 2021 Vito Walter Anelli, Alejandro Bellogín, Tommaso Di Noia, Claudio Pomo

We replicate experiments from three papers that compare Neural Collaborative Filtering (NCF) and Matrix Factorization (MF), to extend the analysis to other evaluation dimensions.

Collaborative Filtering

Point-of-Interest Recommender Systems based on Location-Based Social Networks: A Survey from an Experimental Perspective

no code implementations18 Jun 2021 Pablo Sánchez, Alejandro Bellogín

Point-of-Interest recommendation is an increasing research and developing area within the widely adopted technologies known as Recommender Systems.

Recommendation Systems

Analysing the Effect of Recommendation Algorithms on the Amplification of Misinformation

no code implementations26 Mar 2021 Miriam Fernández, Alejandro Bellogín, Iván Cantador

Recommendation algorithms have been pointed out as one of the major culprits of misinformation spreading in the digital sphere.

Misinformation

Improving Accountability in Recommender Systems Research Through Reproducibility

no code implementations31 Jan 2021 Alejandro Bellogín, Alan Said

In this work, we argue that, by facilitating reproducibility of recommender systems experimentation, we indirectly address the issues of accountability and transparency in recommender systems research from the perspectives of practitioners, designers, and engineers aiming to assess the capabilities of published research works.

Information Retrieval Recommendation Systems +1

Multi-Step Adversarial Perturbations on Recommender Systems Embeddings

no code implementations3 Oct 2020 Vito Walter Anelli, Alejandro Bellogín, Yashar Deldjoo, Tommaso Di Noia, Felice Antonio Merra

However, while the single-step fast gradient sign method (FGSM) is the most explored perturbation strategy, multi-step (iterative) perturbation strategies, that demonstrated higher efficacy in the computer vision domain, have been highly under-researched in recommendation tasks.

Recommendation Systems

A novel approach for venue recommendation using cross-domain techniques

1 code implementation26 Sep 2018 Pablo Sánchez, Alejandro Bellogín

We perform an experimental comparison of several recommendation techniques in a temporal split under two conditions: single-domain (only information from the target city is considered) and cross- domain (information from many other cities is incorporated into the recommendation algorithm).

Recommendation Systems

Cannot find the paper you are looking for? You can Submit a new open access paper.