South America
LNN-powered Fluid Antenna Multiple Access
Alvim, Pedro D., Silva, Hugerles S., Dias, Ugo S., Badarneh, Osamah S., Figueiredo, Felipe A. P., de Souza, Rausley A. A.
Fluid antenna systems represent an innovative approach in wireless communication, recently applied in multiple access to optimize the signal-to-interference-plus-noise ratio through port selection. This letter frames the port selection problem as a multi-label classification task for the first time, improving best-port selection with limited port observations. We address this challenge by leveraging liquid neural networks (LNNs) to predict the optimal port under emerging fluid antenna multiple access scenarios alongside a more general $ฮฑ$-$ฮผ$ fading model. We also apply hyperparameter optimization to refine LNN architectures for different observation scenarios. Our approach yields lower outage probability values than existing methods.
Te Ahorrรฉ Un Click: A Revised Definition of Clickbait and Detection in Spanish News
Mordecki, Gabriel, Moncecchi, Guillermo, Couto, Javier
We revise the definition of clickbait, which lacks current consensus, and argue that the creation of a curiosity gap is the key concept that distinguishes clickbait from other related phenomena such as sensationalism and headlines that do not deliver what they promise or diverge from the article. Therefore, we propose a new definition: clickbait is a technique for generating headlines and teasers that deliberately omit part of the information with the goal of raising the readers' curiosity, capturing their attention and enticing them to click. We introduce a new approach to clickbait detection datasets creation, by refining the concept limits and annotations criteria, minimizing the subjectivity in the decision as much as possible. Following it, we created and release TA1C (for Te Ahorrรฉ Un Click, Spanish for Saved You A Click), the first open source dataset for clickbait detection in Spanish. It consists of 3,500 tweets coming from 18 well known media sources, manually annotated and reaching a 0.825 Fleiss' ฮบ inter annotator agreement. We implement strong baselines that achieve 0.84 in F1-score.
Disentanglement and Assessment of Shortcuts in Ophthalmological Retinal Imaging Exams
Fernandes, Leonor, Gonรงalves, Tiago, Matos, Joรฃo, Nakayama, Luis Filipe, Cardoso, Jaime S.
Diabetic retinopathy (DR) is a leading cause of vision loss in working-age adults. While screening reduces the risk of blindness, traditional imaging is often costly and inaccessible. Artificial intelligence (AI) algorithms present a scalable diagnostic solution, but concerns regarding fairness and generalization persist. This work evaluates the fairness and performance of image-trained models in DR prediction, as well as the impact of disentanglement as a bias mitigation technique, using the diverse mBRSET fundus dataset. Three models, ConvNeXt V2, DINOv2, and Swin V2, were trained on macula images to predict DR and sensitive attributes (SAs) (e.g., age and gender/sex). Fairness was assessed between subgroups of SAs, and disentanglement was applied to reduce bias. All models achieved high DR prediction performance in diagnosing (up to 94% AUROC) and could reasonably predict age and gender/sex (91% and 77% AUROC, respectively). Fairness assessment suggests disparities, such as a 10% AUROC gap between age groups in DINOv2. Disentangling SAs from DR prediction had varying results, depending on the model selected. Disentanglement improved DINOv2 performance (2% AUROC gain), but led to performance drops in ConvNeXt V2 and Swin V2 (7% and 3%, respectively). These findings highlight the complexity of disentangling fine-grained features in fundus imaging and emphasize the importance of fairness in medical imaging AI to ensure equitable and reliable healthcare solutions.
Credit Card Fraud Detection Using RoFormer Model With Relative Distance Rotating Encoding
Fraud detection is one of the most important challenges that financial systems must address. Detecting fraudulent transactions is critical for payment gateway companies like Flow Payment, which process millions of transactions monthly and require robust security measures to mitigate financial risks . Increasing transaction authorization rates while reducing fraud is essential for providing a good user experience and building a sustainable business. For this reason, discovering novel and improved methods to detect fraud requires continuous research an d investment for any company that wants to succeed in this industry. In this work, we introduce d a novel method for detecting transactional fraud by incorporating the Relative Distance Rotating Encoding ( ReDRE) in the RoFormer model . The incorporation of angle rotation using ReDRE enhances the characterization of time series data within a Transformer, leading to improved fraud detection by better capturing temporal dependencies and event relationships.
World's most powerful digital camera captures historic first images
FOX Nation takes viewers back to the '90's in their new series, 'Who Can Forget? The Vera C. Rubin Observatory has just released its first images, captured by the world's most powerful digital camera. Located on Cerro Pachรณn in Chile, this camera is set to transform how we see the universe. After years of planning and building, the observatory is ready to deliver stunning, ultra-detailed views of the night sky. Sign up for my FREE CyberGuy Report Get my best tech tips, urgent security alerts, and exclusive deals delivered straight to your inbox.
Normalized vs Diplomatic Annotation: A Case Study of Automatic Information Extraction from Handwritten Uruguayan Birth Certificates
Bottaioli, Natalia, Tarride, Solรจne, Anger, Jรฉrรฉmy, Mowlavi, Seginus, Gardella, Marina, Tadros, Antoine, Facciolo, Gabriele, von Gioi, Rafael Grompone, Kermorvant, Christopher, Morel, Jean-Michel, Preciozzi, Javier
This study evaluates the recently proposed Document Attention Network (DAN) for extracting key-value information from Uruguayan birth certificates, handwritten in Spanish. We investigate two annotation strategies for automatically transcribing handwritten documents, fine-tuning DAN with minimal training data and annotation effort. Experiments were conducted on two datasets containing the same images (201 scans of birth certificates written by more than 15 different writers) but with different annotation methods. Our findings indicate that normalized annotation is more effective for fields that can be standardized, such as dates and places of birth, whereas diplomatic annotation performs much better for fields containing names and surnames, which can not be standardized.
Generating Proto-Personas through Prompt Engineering: A Case Study on Efficiency, Effectiveness and Empathy
Ayach, Fernando, Lameirรฃo, Vitor, Leรฃo, Raul, Felizardo, Jerfferson, Sobrinho, Rafael, Borges, Vanessa, Matsubara, Patrรญcia, Fontรฃo, Awdren
Proto-personas are commonly used during early-stage Product Discovery, such as Lean Inception, to guide product definition and stakeholder alignment. However, the manual creation of proto-personas is often time-consuming, cognitively demanding, and prone to bias. In this paper, we propose and empirically investigate a prompt engineering-based approach to generate proto-personas with the support of Generative AI (GenAI). Our goal is to evaluate the approach in terms of efficiency, effectiveness, user acceptance, and the empathy elicited by the generated personas. We conducted a case study with 19 participants embedded in a real Lean Inception, employing a qualitative and quantitative methods design. The results reveal the approach's efficiency by reducing time and effort and improving the quality and reusability of personas in later discovery phases, such as Minimum Viable Product (MVP) scoping and feature refinement. While acceptance was generally high, especially regarding perceived usefulness and ease of use, participants noted limitations related to generalization and domain specificity. Furthermore, although cognitive empathy was strongly supported, affective and behavioral empathy varied significantly across participants. These results contribute novel empirical evidence on how GenAI can be effectively integrated into software Product Discovery practices, while also identifying key challenges to be addressed in future iterations of such hybrid design processes.
Enhancing Essay Cohesion Assessment: A Novel Item Response Theory Approach
Rosa, Bruno Alexandre, Oliveira, Hilรกrio, Rodrigues, Luiz, Oliveira, Eduardo Araujo, Mello, Rafael Ferreira
Essays are considered a valuable mechanism for evaluating learning outcomes in writing. Textual cohesion is an essential characteristic of a text, as it facilitates the establishment of meaning between its parts. Automatically scoring cohesion in essays presents a challenge in the field of educational artificial intelligence. The machine learning algorithms used to evaluate texts generally do not consider the individual characteristics of the instances that comprise the analysed corpus. In this meaning, item response theory can be adapted to the context of machine learning, characterising the ability, difficulty and discrimination of the models used. This work proposes and analyses the performance of a cohesion score prediction approach based on item response theory to adjust the scores generated by machine learning models. In this study, the corpus selected for the experiments consisted of the extended Essay-BR, which includes 6,563 essays in the style of the National High School Exam (ENEM), and the Brazilian Portuguese Narrative Essays, comprising 1,235 essays written by 5th to 9th grade students from public schools. We extracted 325 linguistic features and treated the problem as a machine learning regression task. The experimental results indicate that the proposed approach outperforms conventional machine learning models and ensemble methods in several evaluation metrics. This research explores a potential approach for improving the automatic evaluation of cohesion in educational essays.
Trump threatens to strip Rosie O'Donnell's U.S. citizenship as he says she's a 'threat to humanity'
Fox News contributor Raymond Arroyo sounds off on Rosie The Pivoter ODonnell for her latest criticism of the Trump administration and the NEA teacher of the years admission that the job is deeply political. President Donald Trump has escalated his long-running feud with Rosie O'Donnell. On Saturday, Trump, 79, floated the idea of revoking the 63-year-old comedian and actress's U.S. citizenship following her move to Ireland earlier this year. "Because of the fact that Rosie O'Donnell is not in the best interests of our Great Country, I am giving serious consideration to taking away her Citizenship," Trump wrote in a post to his social media platform Truth Social. "She is a Threat to Humanity, and should remain in the wonderful Country of Ireland, if they want her. GOD BLESS AMERICA!" he added.
Fox News 'Antisemitism Exposed' Newsletter: Trump Gets Peace Prize Push from Bibi
President Donald Trump and Israeli Prime Minister Benjamin Netanyahu meet over dinner. Fox News' "Antisemitism Exposed" newsletter brings you stories on the rising anti-Jewish prejudice across the U.S. and the world. TOP STORY: Israeli Prime Minister Benjamin Netanyahu has sent a letter to the Nobel Prize Committee to nominate President Donald Trump for the peace prize. "He forged the Abraham Accords. He's forging peace as we speak, in one country and one region after the other," Netanyahu said at a White House meeting.