Universitat Politècnica de Catalunya: Recent submissions
Now showing items 761-780 of 166451
Recovering Einstein’s mature view of gravitation: a dynamical reconstruction grounded in the equivalence principle
The historical and conceptual foundations of General Relativity are revisited, putting the main focus on the physical meaning of the invariant ¿¿2 , the Equivalence Principle, and the precise interpretation of spacetime ...
Role of hydraulic parameters in the concentration and spatial distribution of heavy metals in sediments in a two-stage reservoir
The role of hydraulic parameters in sediment transport and heavy metals concentration still needs scientific research. In this study, GIS techniques, IBER (a 2D hydrodynamic modeling system) and statistical analysis were ...
Determinants of long-term SARS-CoV-2 immune responses in asymptomatic-to-moderate COVID-19 patients in sub-Saharan Africa
Background Immune responses after SARS-CoV-2 infection remain poorly characterized in African populations, despite widespread viral transmission and proportionally lower COVID-19 severity and mortality than in other regions. ...
RINAsense: an open-source, iow-power Iot sensor node for Recursive InterNetwork Architecture (RINA) experimentation
The proliferation of the Internet of Things (IoT) has exposed fundamental challenges in scalability, security, and management within conventional network architectures. The Recursive InterNetwork Architecture (RINA) presents ...
Enhancing the removal of contaminants of emerging concern from wastewater effluents using recharge-dependent soil aquifer treatment with reactive barriers
Soil-Aquifer Treatment (SAT) systems are a sustainable option for improving wastewater quality and addressing freshwater scarcity. This study assessed how recharge operation (continuous vs. pulsed) and reactive barriers ...
Comparison of the biomechanical characteristics of human ovarian tissue after vitrification versus slow freezing
Objective Numerous studies have compared ovarian tissue cryopreservation methods, including slow freezing/rapid thawing (SF/RT) and vitrification/warming (V/W), focusing on morpho-functional status, follicle density, stromal ...
Challenge-Based Learning in space education. The Barcelona ZeroG Challenge
The ”Barcelona Zero-G Challenge” is a unique international contest aimed at motivating students to conduct research in zero gravity by performing parabolic flights with their experiment in microgravity. An aerobatic aircraft ...
Proyecto «Por una cultura común del riesgo sísmico»
The POCRISC EFA158/16 project, Towards a Common Culture of Seismic Risk, is 65% funded by the European Regional Development Fund (ERDF) through the Interreg V-A Spain France Andorra programme (POCTEFA 2014-2020). It began ...
Field investigation for enhanced in-situ removal of nitrate from groundwater stimulated by the combined injection of acetate and nano zero-valent iron
This study evaluated, at the field-scale, the feasibility of tandem acetate and nano zero-valent iron (nZVI) injection for the removal of NO3- from groundwater through both abiotic and biotic processes. The field pilot ...
Symmetrisation and hyperbolicity of first-order conservation laws in large strain compressible viscoelasticity using the smoothed particle hydrodynamics method
This paper presents a new first-order hyperbolic framework with relaxation (or dissipation) terms for large strain viscoelastic solids. The framework is based on a compressible Maxwell-type viscoelastic model and integrates ...
Nested Feigenbaum cascades and Shil’nikovlike dynamics in convection of binary mixtures
Numerical continuation and stability analysis of periodic orbits are used to analyze, under a dynamical systems point of view, the time dependent dynamics that arise from the steady convection of a H2 -Xe gas mixture, ...
Design and fabrication of a biocompatible antenna for wearable technologies
This paper presents the design, simulation, fabrication, and measurement of a flexible antenna for wearable healthcare applications operating at 2.4 GHz. The antenna utilizes a coplanar waveguide (CPW) structure with ...
Enhancing STEAM education in engineering through the integration of AI and smartphone technology in teaching practices
This paper introduces an innovative educational approach to enhancing Structural Health Monitoring (SHM) within engineering curricula, utilizing smartphones and generative AI. The project bridges the gap between theory and ...
Spectral velocity-and energy-based intensity measures.
In this paper, the statistical relationship between parameters that represent the intensity of ground motions induced by earthquakes (Intensity Measures, IM) and the nonlinear response of buildings (Engineering Demand ...
Effect of biobased SiO2 on the morphological, thermal, mechanical, rheological, and permeability properties of PLLA/PEG/SiO2 biocomposites
Nowadays, companies and researchers are concerned about the negative consequences of using synthetic polymers and direct their efforts to create new alternatives such as biocomposites. This study investigated the effect ...
Urban microclimate and climate change impact on the thermal performance and ventilation of multi-family residential buildings
Urban settings and climate change both impact on energy use and thermal comfort inside buildings. This paper first presents a study of changes in energy demand in residential buildings considering the overlapping effect ...
Closing the acronym gap in educational retrieval with ontology-guided augmentation
Retrieval-augmented generation (RAG) combines information retrieval with language generation to ground model outputs in external evidence, improving factuality, traceability, and freshness, features essential for educational ...
Initial steps toward future 6G standards [Mobile radio]
Following the evolutionary trend of the different generations of mobile communications systems, in recent years, both industry and academia have been deeply immersed in the research toward the development of the technologies ...
The altarpiece of the chapel of Guarenas and the altarpieces of the side chapels of the Church of San Jacinto de Caracas
The following paper presents an approach to the possible original location of an altarpiece that, according to tradition, belonged to the Church of San Jacinto convent in Caracas in the XVIII century, in order to document ...
Sleep-related changes in astrocytic biomarkers are modulated by APOE e4 genotype in cognitively unimpaired adults
Astrocytes are key regulators of sleep and neuroinflammatory responses. However, the relationship between objective sleep parameters and astrocytic fluid biomarkers in cognitively unimpaired individuals remains unclear. ...
