Search Results for author: Andrea Passarella

Found 26 papers, 3 papers with code

Federated Clustering: An Unsupervised Cluster-Wise Training for Decentralized Data Distributions

no code implementations20 Aug 2024 Mirko Nardi, Lorenzo Valerio, Andrea Passarella

Federated Learning (FL) is a pivotal approach in decentralized machine learning, especially when data privacy is crucial and direct data sharing is impractical.

Clustering Federated Learning

FedQUIT: On-Device Federated Unlearning via a Quasi-Competent Virtual Teacher

no code implementations14 Aug 2024 Alessio Mora, Lorenzo Valerio, Paolo Bellavista, Andrea Passarella

Federated Learning (FL) promises better privacy guarantees for individuals' data when machine learning models are collaboratively trained.

Federated Learning Knowledge Distillation

Understanding and Addressing Gender Bias in Expert Finding Task

no code implementations7 Jul 2024 Maddalena Amendola, Carlos Castillo, Andrea Passarella, Raffaele Perego

To the best of our knowledge, this study is the first to focus on detecting and mitigating gender bias in EF methods.

Leveraging Topic Specificity and Social Relationships for Expert Finding in Community Question Answering Platforms

1 code implementation4 Jul 2024 Maddalena Amendola, Andrea Passarella, Raffaele Perego

The effectiveness of these platforms relies on their ability to identify and direct questions to the most knowledgeable users within the community, a process known as Expert Finding (EF).

Community Question Answering Learning-To-Rank +1

Robustness of Decentralised Learning to Nodes and Data Disruption

no code implementations3 May 2024 Luigi Palmieri, Chiara Boldrini, Lorenzo Valerio, Andrea Passarella, Marco Conti, János Kertész

Through these configurations, we are able to show the non-trivial interplay between the properties of the network connecting nodes, the persistence of knowledge acquired collectively before disruption or lack thereof, and the effect of data availability pre- and post-disruption.

Optimizing Risk-averse Human-AI Hybrid Teams

no code implementations13 Mar 2024 Andrew Fuchs, Andrea Passarella, Marco Conti

For hybrid teams, we will refer to both the humans and AI systems as agents.

Impact of network topology on the performance of Decentralized Federated Learning

no code implementations28 Feb 2024 Luigi Palmieri, Chiara Boldrini, Lorenzo Valerio, Andrea Passarella, Marco Conti

We highlight the challenges in transferring knowledge from peripheral to central nodes, attributed to a dilution effect during model aggregation.

Clustering Federated Learning

Optimizing Delegation in Collaborative Human-AI Hybrid Teams

no code implementations8 Feb 2024 Andrew Fuchs, Andrea Passarella, Marco Conti

The manager learns a model of behavior linking observations of agent performance and the environment/world the team is operating in, and from these observations makes the most desirable selection of a control agent.

Autonomous Driving Collision Avoidance

Coordination-free Decentralised Federated Learning on Complex Networks: Overcoming Heterogeneity

no code implementations7 Dec 2023 Lorenzo Valerio, Chiara Boldrini, Andrea Passarella, János Kertész, Márton Karsai, Gerardo Iñiguez

Federated Learning (FL) is a well-known framework for successfully performing a learning task in an edge computing scenario where the devices involved have limited resources and incomplete data representation.

Edge-computing Federated Learning

Optimizing delegation between human and AI collaborative agents

no code implementations26 Sep 2023 Andrew Fuchs, Andrea Passarella, Marco Conti

In the context of humans operating with artificial or autonomous agents in a hybrid team, it is essential to accurately identify when to authorize those team members to perform actions.

The effect of network topologies on fully decentralized learning: a preliminary investigation

no code implementations29 Jul 2023 Luigi Palmieri, Lorenzo Valerio, Chiara Boldrini, Andrea Passarella

Specifically, we highlight the different roles in this process of more or less connected nodes (hubs and leaves), as well as that of macroscopic network properties (primarily, degree distribution and modularity).

Human-AI Coevolution

no code implementations23 Jun 2023 Dino Pedreschi, Luca Pappalardo, Emanuele Ferragina, Ricardo Baeza-Yates, Albert-Laszlo Barabasi, Frank Dignum, Virginia Dignum, Tina Eliassi-Rad, Fosca Giannotti, Janos Kertesz, Alistair Knott, Yannis Ioannidis, Paul Lukowicz, Andrea Passarella, Alex Sandy Pentland, John Shawe-Taylor, Alessandro Vespignani

Human-AI coevolution, defined as a process in which humans and AI algorithms continuously influence each other, increasingly characterises our society, but is understudied in artificial intelligence and complexity science literature.

Recommendation Systems

Compensating for Sensing Failures via Delegation in Human-AI Hybrid Systems

no code implementations2 Mar 2023 Andrew Fuchs, Andrea Passarella, Marco Conti

In this context, the manager will estimate its best action based on the likelihood of either (human, autonomous) agent failure as a result of their sensing capabilities and possible deficiencies.

Attribute Decision Making +1

Anomaly Detection through Unsupervised Federated Learning

1 code implementation9 Sep 2022 Mirko Nardi, Lorenzo Valerio, Andrea Passarella

Experiments show that our method is robust, and it can detect communities consistent with the ideal partitioning in which groups of clients having the same inlier patterns are known.

Anomaly Detection Federated Learning

Modeling Human Behavior Part II -- Cognitive approaches and Uncertainty

no code implementations13 May 2022 Andrew Fuchs, Andrea Passarella, Marco Conti

We will arrange these topics as follows (i) methods such as cognitive architectures, cognitive heuristics, and related which demonstrate assumptions of limitations on cognitive resources and how that impacts decisions and (ii) methods which generate and utilize representations of bias or uncertainty to model human decision-making or the future outcomes of decisions.

Decision Making

Modeling Human Behavior Part I -- Learning and Belief Approaches

no code implementations13 May 2022 Andrew Fuchs, Andrea Passarella, Marco Conti

To make this possible, autonomous agents will require the ability to embed practical models of human behavior, which allow them not only to replicate human models as a technique to "learn", but to to understand the actions of users and anticipate their behavior, so as to truly operate in symbiosis with them.

A Cognitive Framework for Delegation Between Error-Prone AI and Human Agents

no code implementations6 Apr 2022 Andrew Fuchs, Andrea Passarella, Marco Conti

With humans interacting with AI-based systems at an increasing rate, it is necessary to ensure the artificial systems are acting in a manner which reflects understanding of the human.

Structural invariants and semantic fingerprints in the "ego network" of words

no code implementations1 Mar 2022 Kilian Ollivier, Chiara Boldrini, Andrea Passarella, Marco Conti

In this respect, ring #1 can be seen as the semantic fingerprint of the ego network of words.

Predictive Auto-scaling with OpenStack Monasca

1 code implementation3 Nov 2021 Giacomo Lanciano, Filippo Galli, Tommaso Cucinotta, Davide Bacciu, Andrea Passarella

Cloud auto-scaling mechanisms are typically based on reactive automation rules that scale a cluster whenever some metric, e. g., the average CPU usage among instances, exceeds a predefined threshold.

Time Series Forecasting

Cellular traffic offloading via Opportunistic Networking with Reinforcement Learning

no code implementations1 Oct 2021 Lorenzo Valerio, Raffaele Bruno, Andrea Passarella

We show that our system based on Reinforcement Learning is able to automatically learn a very efficient strategy to reduce the traffic on the cellular network, without relying on any additional context information about the opportunistic network.

Q-Learning reinforcement-learning +2

A communication efficient distributed learning framework for smart environments

no code implementations27 Sep 2021 Lorenzo Valerio, Andrea Passarella, Marco Conti

In the specific case analysed in the paper, we focus on a learning task, considering two distributed learning algorithms.

Activity Recognition

Energy efficient distributed analytics at the edge of the network for IoT environments

no code implementations23 Sep 2021 Lorenzo Valerio, Marco Conti, Andrea Passarella

We analyse the performance of different configurations of the distributed learning framework, in terms of (i) accuracy obtained in the learning task and (ii) energy spent to send data between the involved nodes.

Transfer Learning

Harnessing the Power of Ego Network Layers for Link Prediction in Online Social Networks

no code implementations19 Sep 2021 Mustafa Toprak, Chiara Boldrini, Andrea Passarella, Marco Conti

In order to validate this claim, we focus on popular feature-extraction prediction algorithms (both unsupervised and supervised) and we extend them to include social-circles awareness.

Link Prediction

Optimising cost vs accuracy of decentralised analytics in fog computing environments

no code implementations9 Dec 2020 Lorenzo Valerio, Andrea Passarella, Marco Conti

Decentralising AI tasks on several cooperative devices means identifying the optimal set of locations or Collection Points (CP for short) to use, in the continuum between full centralisation (i. e., all data on a single device) and full decentralisation (i. e., data on source locations).

Dynamic Hard Pruning of Neural Networks at the Edge of the Internet

no code implementations17 Nov 2020 Lorenzo Valerio, Franco Maria Nardini, Andrea Passarella, Raffaele Perego

Results show that DynHP compresses a NN up to $10$ times without significant performance drops (up to $3. 5\%$ additional error w. r. t.

Edge-computing

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