Search Results for author: Marco O. P. Sampaio

Found 7 papers, 2 papers with code

Cost-Sensitive Learning to Defer to Multiple Experts with Workload Constraints

no code implementations11 Mar 2024 Jean V. Alves, Diogo Leitão, Sérgio Jesus, Marco O. P. Sampaio, Javier Liébana, Pedro Saleiro, Mário A. T. Figueiredo, Pedro Bizarro

Learning to defer (L2D) aims to improve human-AI collaboration systems by learning how to defer decisions to humans when they are more likely to be correct than an ML classifier.

Fraud Detection

FiFAR: A Fraud Detection Dataset for Learning to Defer

1 code implementation20 Dec 2023 Jean V. Alves, Diogo Leitão, Sérgio Jesus, Marco O. P. Sampaio, Pedro Saleiro, Mário A. T. Figueiredo, Pedro Bizarro

Financial fraud detection is a high-stakes setting where algorithms and human experts often work in tandem; however, there are no publicly available datasets for L2D concerning this important application of human-AI teaming.

Benchmarking Decision Making +1

Adversarial training for tabular data with attack propagation

no code implementations28 Jul 2023 Tiago Leon Melo, João Bravo, Marco O. P. Sampaio, Paolo Romano, Hugo Ferreira, João Tiago Ascensão, Pedro Bizarro

Adversarial attacks are a major concern in security-centered applications, where malicious actors continuously try to mislead Machine Learning (ML) models into wrongly classifying fraudulent activity as legitimate, whereas system maintainers try to stop them.

Feature Engineering Fraud Detection

Lightweight Automated Feature Monitoring for Data Streams

no code implementations18 Jul 2022 João Conde, Ricardo Moreira, João Torres, Pedro Cardoso, Hugo R. C. Ferreira, Marco O. P. Sampaio, João Tiago Ascensão, Pedro Bizarro

We propose a flexible system, Feature Monitoring (FM), that detects data drifts in such data sets, with a small and constant memory footprint and a small computational cost in streaming applications.

Active learning for imbalanced data under cold start

no code implementations16 Jul 2021 Ricardo Barata, Miguel Leite, Ricardo Pacheco, Marco O. P. Sampaio, João Tiago Ascensão, Pedro Bizarro

Modern systems that rely on Machine Learning (ML) for predictive modelling, may suffer from the cold-start problem: supervised models work well but, initially, there are no labels, which are costly or slow to obtain.

Active Learning Fraud Detection

Automatic Model Monitoring for Data Streams

no code implementations12 Aug 2019 Fábio Pinto, Marco O. P. Sampaio, Pedro Bizarro

We evaluated SAMM using human feedback from domain experts, by sending them 100 reports generated by the system.

Fraud Detection

The N2HDM under Theoretical and Experimental Scrutiny

1 code implementation5 Dec 2016 Margarete Muhlleitner, Marco O. P. Sampaio, Rui Santos, Jonas Wittbrodt

Its enlarged parameter space and its fewer symmetry conditions as compared to supersymmetric models allow for an interesting phenomenology compatible with current experimental constraints, while adding to the 2HDM sector the possibility of Higgs-to-Higgs decays with three different Higgs bosons.

High Energy Physics - Phenomenology

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