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Publicações

Publicações por João Vinagre

2016

Scalable adaptive collaborative filtering

Autores
Vinagre, J;

Publicação

Abstract

2020

Inteligência Artificial

Autores
Vinagre, J; Moniz, N;

Publicação
Revista de Ciência Elementar

Abstract

2025

Budget-Constrained Collaborative Renewable Energy Forecasting Market

Autores
Gonçalves, C; Bessa, RJ; Teixeira, T; Vinagre, J;

Publicação
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY

Abstract
Accurate power forecasting from renewable energy sources (RES) is crucial for integrating additional RES capacity into the power system and realizing sustainability goals. This work emphasizes the importance of integrating decentralized spatio-temporal data into forecasting models. However, decentralized data ownership presents a critical obstacle to the success of such spatio-temporal models, and incentive mechanisms to foster data-sharing need to be considered. The main contributions are a) a comparative analysis of the forecasting models, advocating for efficient and interpretable spline LASSO regression models, and b) a bidding mechanism within the data/analytics market to ensure fair compensation for data providers and enable both buyers and sellers to express their data price requirements. Furthermore, an incentive mechanism for time series forecasting is proposed, effectively incorporating price constraints and preventing redundant feature allocation. Results show significant accuracy improvements and potential monetary gains for data sellers. For wind power data, an average root mean squared error improvement of over 10% was achieved by comparing forecasts generated by the proposal with locally generated ones.

2024

Rethinking negative sampling in content-based news recommendation

Autores
Rebelo, MA; Vinagre, J; Pereira, I; Figueira, A;

Publicação
CoRR

Abstract

2024

Flow Correlation Attacks on Tor Onion Service Sessions with Sliding Subset Sum

Autores
Lopes, D; Dong, JD; Medeiros, P; Castro, D; Barradas, D; Portela, B; Vinagre, J; Ferreira, B; Christin, N; Santos, N;

Publicação
NDSS

Abstract

2024

Federated Online Learning for Heavy Hitter Detection

Autores
Silva, P; Vinagre, J; Gama, J;

Publicação
ECAI 2024

Abstract
Effective anomaly detection in telecommunication networks is essential for securing digital transactions and supporting the sustainability of our global information ecosystem. However, the volume of data in such high-speed distributed environments imposes strict latency and scalability requirements on anomaly detection systems. This study focuses on distributed heavy hitter detection in telephone networks - a critical component of network traffic analysis and fraud detection. We propose a federated version of the Lossy Counting algorithm and compare it to its centralized version. Our experimental results reveal that the federated approach can detect considerably more unique heavy hitters than the centralized method while enhancing privacy. Furthermore, Federated Lossy Counting does not need a large amount of centralized processing power since it can leverage the networked infrastructure with minimal impact on bandwidth and computing power.

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