padova
Towards Continual Visual Anomaly Detection in the Medical Domain
Barusco, Manuel, Borsatti, Francesco, Beda, Nicola, Pezze, Davide Dalle, Susto, Gian Antonio
Visual Anomaly Detection (VAD) seeks to identify abnormal images and precisely localize the corresponding anomalous regions, relying solely on normal data during training. This approach has proven essential in domains such as manufacturing and, more recently, in the medical field, where accurate and explainable detection is critical. Despite its importance, the impact of evolving input data distributions over time has received limited attention, even though such changes can significantly degrade model performance. In particular, given the dynamic and evolving nature of medical imaging data, Continual Learning (CL) provides a natural and effective framework to incrementally adapt models while preserving previously acquired knowledge. This study explores for the first time the application of VAD models in a CL scenario for the medical field. In this work, we utilize a CL version of the well-established PatchCore model, called PatchCoreCL, and evaluate its performance using BMAD, a real-world medical imaging dataset with both image-level and pixel-level annotations. Our results demonstrate that PatchCoreCL is an effective solution, achieving performance comparable to the task-specific models, with a forgetting value less than a 1%, highlighting the feasibility and potential of CL for adaptive VAD in medical imaging.
Knowledge-Aware Diverse Reranking for Cross-Source Question Answering
This paper presents Team Marikarp's solution for the SIGIR 2025 LiveRAG competition. The competition's evaluation set, automatically generated by DataMorgana from internet corpora, encompassed a wide range of target topics, question types, question formulations, audience types, and knowledge organization methods. It offered a fair evaluation of retrieving question-relevant supporting documents from a 15M documents subset of the FineWeb corpus. Our proposed knowledge-aware diverse reranking RAG pipeline achieved first place in the competition.
SelfEEG: A Python library for Self-Supervised Learning in Electroencephalography
Del Pup, Federico, Zanola, Andrea, Tshimanga, Louis Fabrice, Mazzon, Paolo Emilio, Atzori, Manfredo
SelfEEG is an open-source Python library developed to assist researchers in conducting Self-Supervised Learning (SSL) experiments on electroencephalography (EEG) data. Its primary objective is to offer a user-friendly but highly customizable environment, enabling users to efficiently design and execute self-supervised learning tasks on EEG data. SelfEEG covers all the stages of a typical SSL pipeline, ranging from data import to model design and training. It includes modules specifically designed to: split data at various granularity levels (e.g., session-, subject-, or dataset-based splits); effectively manage data stored with different configurations (e.g., file extensions, data types) during mini-batch construction; provide a wide range of standard deep learning models, data augmentations and SSL baseline methods applied to EEG data. Most of the functionalities offered by selfEEG can be executed both on GPUs and CPUs, expanding its usability beyond the self-supervised learning area. Additionally, these functionalities can be employed for the analysis of other biomedical signals often coupled with EEGs, such as electromyography or electrocardiography data. These features make selfEEG a versatile deep learning tool for biomedical applications and a useful resource in SSL, one of the currently most active fields of Artificial Intelligence.
Spot-A-Gun Tech "Could Have Prevented" School Shooting
Joe Levy is working hard to help avoid another mass school shooting tragedy. He says his technology, designed to spot a gun using existing CCTV cameras, could make a critical difference in future life-or-death situations. Seventeen people died in 2018 when a 19-year-old student opened fire at Stoneman Douglas High School, in Parkland, Florida, USA. Fifteen died in the Columbine High School massacre, near Denver, Colorado, in 1999 when a 17-year-old and an 18-year-old shot fellow students. And 22 people died in May of this year when an 18-year-old rampaged through the Robb Elementary School, in Uvalde, Texas – one of the worst school shootings in US history.
Quantum-inspired Machine Learning on high-energy physics data
Felser, Timo, Trenti, Marco, Sestini, Lorenzo, Gianelle, Alessio, Zuliani, Davide, Lucchesi, Donatella, Montangero, Simone
Tensor Networks, a numerical tool originally designed for simulating quantum many-body systems, have recently been applied to solve Machine Learning problems. Exploiting a tree tensor network, we apply a quantum-inspired machine learning technique to a very important and challenging big data problem in high energy physics: the analysis and classification of data produced by the Large Hadron Collider at CERN. In particular, we present how to effectively classify so-called b-jets, jets originating from b-quarks from proton-proton collisions in the LHCb experiment, and how to interpret the classification results. We exploit the Tensor Network approach to select important features and adapt the network geometry based on information acquired in the learning process. Finally, we show how to adapt the tree tensor network to achieve optimal precision or fast response in time without the need of repeating the learning process. These results pave the way to the implementation of high-frequency real-time applications, a key ingredient needed among others for current and future LHCb event classification able to trigger events at the tens of MHz scale.
Researchers successfully connect biological and artificial neurons online
It was only a few months ago that I wrote about Scientists who developed artificial neurons that mimic our brain cells. Scientists at the University of Bath, Universities of Bristol, Zurich & Auckland collaborated on this effort where the behavior of our brain cells was replicated on tiny silicon chips. As we enter the age of supercomputers, they are still not powerful enough to match the brainpower of biological neurons that power the organ. The neurons communicate via tiny gaps known as synapses. These neurons have a dual mechanism of storing and processing information.
Power Gradient Descent
The development of machine learning is promoting the search for fast and stable minimization algorithms. To this end, we suggest a change in the current gradient descent methods that should speed up the motion in flat regions and slow it down in steep directions of the function to minimize. It is based on a "power gradient", in which each component of the gradient is replaced by its versus-preserving $H$-th power, with $0
A Short Introduction to Preferences: Between AI and Social Choice
Rossi, Francesca, Venable, Kristen Brent, Walsh, Toby
Computational social choice is an expanding field that merges classical topics like economics and voting theory with more modern topics like artificial intelligence, multiagent systems, and computational complexity. This book provides a concise introduction to the main research lines in this field, covering aspects such as preference modelling, uncertainty reasoning, social choice, stable matching, and computational aspects of preference aggregation and manipulation. The book is centered around the notion of preference reasoning, both in the single-agent and the multi-agent setting. It presents the main approaches to modeling and reasoning with preferences, with particular attention to two popular and powerful formalisms, soft constraints and CP-nets. The authors consider preference elicitation and various forms of uncertainty in soft constraints.