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Alessandro Petruzzelli

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#artificial intelligence Preprint Sep 2026

MoSAR: Mixture of Semantic Attention Regimes for Learning Adaptive and Approximable Attention Geometries

Mixture of Semantic Attention Regimes (MoSAR) is introduced, which learns such an adaptive, controlled-decay geometry over query--key interactions, suggesting that it is not only adaptive, but also amenable to low-cost approximation at inference time.

M. Paolicelli, Alessandro Petruzzelli, Alessandro Francesco Maria Martina et al. · 0 citations
Book Open access Sep 2026

Simulating Diverse User Behavioral Stereotypes for Evaluating Agentic Conversational Recommenders

Agentic Conversational Recommender Systems (ACRSs) are designed to recommend through multi-turn dialogue with users whose needs are not fully formed at the outset. However, their evaluation almost exclusively relies on user simulators that instantiate users with clear, pre-formed needs, reducing the interaction to a re...

Alessandro Petruzzelli, Alessandro Francesco Maria Martina, C. Musto et al. · 1 citation
Open access Jul 2026

Beyond the Lookup: Simulating Realistic User Uncertainty for the Evaluation of Conversational Agentic Recommenders

This work introduces a family of open-weight user simulation models capable of generalizing across diverse e-commerce domains and operationalizes three distinct behavioral stereotypes, highlighting the necessity of a scalable framework for rigorously stress-testing the next generation of conversational agents against r...

Alessandro Petruzzelli, Alessandro Francesco Maria Martina, C. Musto et al. · 0 citations
Open access Jul 2026

Integrating Heterogeneous Knowledge for Enhanced Recommendation with Large Language Models

The proposed REKALM, a comprehensive integration framework for enhancing LLM-based recommenders through knowledge integration, demonstrates that augmenting LLMs with lexicalized, domain-specific knowledge is an effective system-level strategy for advancing the next generation of recommender systems.

Alessandro Petruzzelli, C. Musto, Marco De Gemmis et al. · 0 citations

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