Universidad Carlos III de Madrid

FedPoP: federated learning meets proof of participation

Federated learning (FL) offers privacy preserving, distributed machine learning, allowing clients to contribute to a global model without revealing their local data. As models increasingly serve as monetizable digital assets, the ability to prove participation in their training b...

Assessing Mental Health Without Relying on Psychiatric Data

Approximately one in seven people worldwide is affected by a mental disorder, making early identification crucial for preventing symptom progression and chronicity. However, diagnosis remains challenging, with discrepancies between referring physicians’ initial assessments and sp...

Dielectric Nanoparticle Dimers on a Mirror for Enhanced Photoluminescence of Quantum Dots

ABSTRACT Nanoantennas for enhancing quantum emitters' response have attracted considerable attention, particularly those based on hybrid metal‐dielectric configurations. However, it remains a challenge to simultaneously enhance excitation and emission while maintaining directiona...

Mapping the Strength–Ductility Landscape of Recycled Polypropylene Blends Through Automated Compounding

ABSTRACT The increasing use of recycled polypropylene (rPP) in engineering applications is limited by reduced ductility and material variability. In this study, a systematic experimental and statistical analysis approach was used to investigate polypropylene (PP) blends combining...

Multi-Objective Minimal Feature Selection for Explainable-by-Design Classification: Equivalence-Aware Selection and Rashomon-Set Analysis Across Six Domains

High-stakes and regulated decision-support systems require predictive models that are simultaneously accurate and interpretable, yet accuracy is frequently obtained through opaque models whose behaviour is difficult to audit. This paper develops an explainable-by-design classific...

Information design in cheap talk

Abstract An uninformed sender publicly commits to an informative experiment about an uncertain state, privately observes its outcome, and sends a cheap talk message to a receiver. We provide an algorithm valid for arbitrary state-dependent preferences that will determine the send...

D6.1 PRIME-6G Project Handbook

This deliverable is the PRIME-6G Project Handbook, where all the project management and quality assurance procedures are recorded. Its main objective is to maintain a record of the different , processes, tools and practices that is easily accessible to all partners.

Burning characteristics and micro-explosions of free-falling boron-based slurry-fuel droplets

Boron-based slurry fuels are promising high-energy-density propellants for advanced aerospace propulsion systems, yet their fundamental combustion behaviors remain insufficiently understood. In this paper, we have developed a novel flat-flame-supported experimental platform to pr...

On the Measurement of Gaps

ABSTRACT Extracting ‘stars’ and ‘gaps’ variables from macroeconomic time series is challenging. We highlight common pitfalls and suggest how to link gap measurement to robust features of existing new Keynesian theories.

Kernel $$K$$-Means Clustering of Distributional Data

Abstract We consider the problem of clustering a sample of probability distributions from a random distribution on $$\mathbb R^d$$ R d . Our proposed partitioning method makes use of a symmetric, positive-definite kernel $$k$$ k and its associated reproducing kernel Hilbert space...

Direct aqueous mineral carbonation of cementitious fines derived from hardened ready-mix concrete waste: Process performance and carbon accounting

The growing need to mitigate anthropogenic CO 2 emissions is driving the development of low-energy carbon capture and utilization technologies. Hardened ready-mix concrete waste represents an underexplored alkaline feedstock for direct aqueous mineral carbonation, offering opport...

Geometric design of confining lunar landing pads for plume-surface interaction mitigation: a comparative CFD study

Rocket exhaust impinging on the unconsolidated lunar regolith erodes the surface and ejects dust, sand and gravel at velocities that can exceed the lunar escape velocity, threatening nearby surface assets, orbiting hardware and the lander itself. This preprint presents a comparat...

Understanding Newcomer Persistence in Social VR: A Case Study of VRChat

Newcomers are crucial for the growth of online communities, yet their successful integration into these spaces requires overcoming significant initial hurdles. Social Virtual Reality (VR) platforms are novel avenues that offer unprecedented online interaction experiences. Unlike...

Improving big data analytics ecosystems using ad-hoc parallel file systems

Data processing in different technology areas, such as Artificial Intelligence or Big Data, has recently challenged High-Performance Computing (HPC). This has led to innovation in processing and managing these huge volumes of data. Numerous systems have sought to address this big...

Approximate Factor Models for Functional Time Series

We propose a novel approximate factor model tailored for analyzing time-dependent curve data. Our model decomposes such data into two distinct components: a low-dimensional predictable factor component and an unpredictable error term. These components are identified through the a...

PVA Nanofibers by Solution Blow Spinning: Processing Principles, Challenges, and Biomedical Applications

Poly(vinyl alcohol) (PVA) nanofibers have emerged as versatile materials in biomedical science due to the high surface-to-volume ratio enabled by nanofibrous morphologies, together with their biocompatibility, hydrophilicity, low toxicity, water solubility, and ease of chemical m...

Balancing Hydrogen Bonding and Crystallinity in Enzymatically Functionalized Lignin–Poly(vinyl alcohol) Composite Films

Poly(vinyl alcohol) (PVA) is a promising biodegradable polymer; however, its reliance on petroleum and incompatibility with raw lignin additives hinder sustainable PVA composite development. In this study, mechanically robust PVA/functionalized acid-soluble lignin (fLGAS) composi...

Basic Analysis of Interarea Oscillations Between the Iberian Peninsula and the Rest of Europe Using Reduced Academic Models of the Spanish Electric Power System

This article shows an analysis of interarea oscillations between the Iberian Peninsula and the rest of Europe using three reduced academic models of Red Eléctrica de España (REE). The original model has 10 nodes in 400 kV for REE, the other two models have 61 nodes in 400 kV for...

Critical for Whom? Reassessing European Union Critical Raw Materials from the Perspective of Chile, Brazil, and Peru for Sustainable Resource Governance

Critical raw material (CRM) lists are published almost exclusively by import-dependent economies, most notably the European Union (EU) and the United States, while many of the countries holding the world’s largest mineral reserves lack official CRM frameworks of their own. This a...

What Computation Cannot Be: Linguistic Colonization, Formal Limits, and a Taxonomy of Irreducibly Human Faculties

The vocabulary of artificial intelligence has colonized human self-description. Terms historically reserved for conscious agents—intelligence, learning, understanding, creativity—now routinely designate computational processes that bear no phenomenological resemblance to the expe...