precision and speed
Temporal fine-tuning for early risk detection
Thompson, Horacio, Villatoro-Tello, Esaú, Montes-y-Gómez, Manuel, Errecalde, Marcelo
Early Risk Detection (ERD) on the Web aims to identify promptly users facing social and health issues. Users are analyzed post-by-post, and it is necessary to guarantee correct and quick answers, which is particularly challenging in critical scenarios. ERD involves optimizing classification precision and minimizing detection delay. Standard classification metrics may not suffice, resorting to specific metrics such as ERDE(theta) that explicitly consider precision and delay. The current research focuses on applying a multi-objective approach, prioritizing classification performance and establishing a separate criterion for decision time. In this work, we propose a completely different strategy, temporal fine-tuning, which allows tuning transformer-based models by explicitly incorporating time within the learning process. Our method allows us to analyze complete user post histories, tune models considering different contexts, and evaluate training performance using temporal metrics. We evaluated our proposal in the depression and eating disorders tasks for the Spanish language, achieving competitive results compared to the best models of MentalRiskES 2023. We found that temporal fine-tuning optimized decisions considering context and time progress. In this way, by properly taking advantage of the power of transformers, it is possible to address ERD by combining precision and speed as a single objective.
- Europe > Switzerland (0.04)
- South America > Chile > Santiago Metropolitan Region > Santiago Province > Santiago (0.04)
- South America > Argentina > Pampas > Buenos Aires F.D. > Buenos Aires (0.04)
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A Time-Aware Approach to Early Detection of Anorexia: UNSL at eRisk 2024
Thompson, Horacio, Errecalde, Marcelo
The eRisk laboratory aims to address issues related to early risk detection on the Web. In this year's edition, three tasks were proposed, where Task 2 was about early detection of signs of anorexia. Early risk detection is a problem where precision and speed are two crucial objectives. Our research group solved Task 2 by defining a CPI+DMC approach, addressing both objectives independently, and a time-aware approach, where precision and speed are considered a combined single-objective. We implemented the last approach by explicitly integrating time during the learning process, considering the ERDE{\theta} metric as the training objective. It also allowed us to incorporate temporal metrics to validate and select the optimal models. We achieved outstanding results for the ERDE50 metric and ranking-based metrics, demonstrating consistency in solving ERD problems.
- Europe > France > Auvergne-Rhône-Alpes > Isère > Grenoble (0.05)
- South America > Argentina > Cuyo > San Luis Province > San Luis (0.04)
- Information Technology > Artificial Intelligence (1.00)
- Information Technology > Communications > Social Media (0.52)
- Information Technology > Data Science > Data Mining (0.32)
Scientists develop a prosthetic hand that is able to restore over 90 per cent of functionality
A prosthetic hand that can grip and move like a normal hand could restore over 90 per cent of functionality to people with upper-limb amputations, developers claim. A team of orthopedists, industrial designers and patients worked with scientists from the Istituto Italiano di Tecnologia, Italy, on the artificial hand named Hannes. The limb was designed to accurately replicate the size, weight, appearance, and natural grasping motion of a human hand to help people gain near normal control. Researchers claim Hannes is ready for market and has been given regulatory approval. The team are now working to find investors to make it a reality.
- Information Technology > Communications > Mobile (0.55)
- Information Technology > Artificial Intelligence (0.36)
A universal tradeoff between power, precision and speed in physical communication
Lahiri, Subhaneil, Sohl-Dickstein, Jascha, Ganguli, Surya
Maximizing the speed and precision of communication while minimizing power dissipation is a fundamental engineering design goal. Also, biological systems achieve remarkable speed, precision and power efficiency using poorly understood physical design principles. Powerful theories like information theory and thermodynamics do not provide general limits on power, precision and speed. Here we go beyond these classical theories to prove that the product of precision and speed is universally bounded by power dissipation in any physical communication channel whose dynamics is faster than that of the signal. Moreover, our derivation involves a novel connection between friction and information geometry. These results may yield insight into both the engineering design of communication devices and the structure and function of biological signaling systems.
- North America > United States > California > Santa Clara County > Stanford (0.04)
- North America > United States > California > Santa Clara County > Mountain View (0.04)
- Asia > India > West Bengal > Kolkata (0.04)