Resultados de investigación

[EN] LED lighting has become the standard solution for illumination purposes thanks to its energy efficiency. Nowadays, there is growing interest in the use of LEDs for data transmission to develop future-generation communication systems. The low cost and widespread deployment of phosphor-based white LEDs make them the best candidate for visible light communications (VLC), although they have a limited modulation bandwidth. This paper presents a simulation model of a VLC link based on phosphor-based white LEDs and a method to characterize the VLC setup used to perform the data transmission experiments. Specifically, the simulation model incorporates the frequency response of the LED, the noise levels coming from the lighting source and the acquisition electronics, and the attenuation due to both the propagation channel and the angular misalignment between the lighting source and the photoreceiver. In order to validate the suitability of the model for VLC, carrierless amplitude phase (CAP) and orthogonal frequency division multiplexing (OFDM) modulation signals were employed for data transmission, and simulations with the proposed model and measurements over the equivalent scenario show high agreement.

[EN] This dataset is deposited under the official title 'University Color Preferences (2010–2025): Raw, Harmonized, and Analytical Dataset from Final-Year Students at the Universitat Politècnica de València'. This dataset documents a long-running classroom study on colour preferences in university students. In each academic cohort, participants were asked to write down and rank 15 colour names from most liked to least liked, using one-word labels and without being given a predefined list of options. The present deposit is organised as a bilingual master workbook. It preserves the original Spanish responses, provides English glosses, documents the coding decisions used to harmonise the lexical labels, and separates the raw data from the analytical dataset that should be used for calculations, tables, text, and figures. The workbook contains 363 anonymised participants and 5,445 ordered colour responses collected across 14 academic cohorts. It was prepared to serve both as a deposit-ready research dataset and as the single source of truth for the analyses associated with the article derived from these data.

A theoretical analysis of a three-phase grid-connected B4 photovoltaic inverter was carried out, including modeling, control design, and stability assessment of the current and voltage control loops. The influence of photovoltaic voltage and grid inductance variations was analyzed through a parametric stability study. Finally, simulation-based evaluations were performed under ideal and distorted grid conditions to assess harmonic behavior, DC bus voltage ripple, and overall system performance., Funded by the Ministerio de Ciencia e Innovacion of Spain and the European Regional Development Fund (ERDF) under Grant PID2021-122835OB-C22

Biofloc technology is an increasingly used strategy for more sustainable shrimp farming. However, new approaches are still needed to improve water quality and animal health. In this study, we evaluated the effects of the green microalga Chlorella sp. and a commercial probiotic, applied separately or in combination, in a biofloc system for Pacific white shrimp culture. A single inoculation of Chlorella sp. maintained a stable population for approximately 40 days. The microalga contributed to nutrient bioremediation in water and increased the nutritional value of the biofloc, a natural food source for shrimp. However, shrimp reared in microalgae treatments showed lower growth performance and survival, which may have been associated with prolonged exposure to the elevated nitrate levels associated with microalgae inoculation. In contrast, the probiotic and control treatments showed comparable zootechnical performance, and both outperformed the microalgae treatments. Probiotic supplementation also reduced the abundance of Flavobacteriaceae, a bacterial family proposed as a bioindicator of White Feces Syndrome (WFS). Overall, these findings suggest that microalgae have considerable potential to improve the sustainability of biofloc systems, provided that the inoculation protocol should be optimized, and confirm the probiotic as an effective strategy to enhance shrimp productivity and health., The authors would like to thank the technical staff of the Aquaculture Laboratory of the Universitat Politècnica de València for their assistance during the experimental work. We would also like to sincerely thank João Rito for his invaluable help and support throughout the entire experimental process.

Este conjunto de datos contiene los datos experimentales generados durante un estudio destinado a evaluar el uso de bacteriófagos como agentes de control biológico frente a Salmonella en entornos asociados a la producción avícola. Los datos incluyen la caracterización fenotípica de los bacteriófagos ΦCEU3 y ΦCEU7, incluyendo su estabilidad en diferentes condiciones de pH y temperatura y sus cinéticas de replicación. El conjunto de datos también incluye los resultados de detección cualitativa de Salmonella en superficies de cemento, metal y slat , tanto en condiciones de control como tras el tratamiento con bacteriófagos y en diferentes tiempos de muestreo. Además, se proporcionan datos de sensibilidad antimicrobiana y la clasificación de resistencia de las cepas de Salmonella de importancia por la salud publica, utilizadas en el estudio.

This dataset contains raw cyclic voltammetry (CV) measurements obtained for four different electrolytes, based on sulphates and chlorides, containing the Fe³⁺/Fe²⁺ redox couple. The experiments were performed at scan rates between 0.005 and 0.1 V·s⁻¹ and repeated in triplicate. Each voltammetry consisted of three cycles, and only the third cycle is included in this dataset. The dataset includes cyclic voltammetry measurements obtained in four different electrolyte formulations, labeled E1–E4. The composition of each electrolyte is the following: 1.) E1: 1 M H₂SO₄ + 50 mM FeSO₄ + 50 mM Fe₂(SO₄)₃ 2.) E2: 0.001 M H₂SO₄ + 0.999 M Na₂SO₄ + 50 mM FeSO₄ + 50 mM Fe₂(SO₄)₃ 3.) E3: 1 M HCl + 50 mM FeCl₂ + 50 mM FeCl₃ 4.) E4: 0.1 M HCl + 0.9 M NaCl + 50 mM FeCl₂ + 50 mM FeCl₃ File List: - E1: A folder containing the cyclic voltammetry data corresponding to electrolyte E1. The folder contains three different subfolders, each one corresponding to an independent repetition of the experiment (Rep_1, Rep_2 and Rep_3). Each repetition subfolder contains 11 CSV files, corresponding to cyclic voltammetry measurements performed at different scan rates ranging from 0.005 V·s⁻¹ to 0.1 V·s⁻¹. Each CSV file is labeled according to its corresponding scan rate. Each CSV file contains the raw electrochemical data corresponding to the third voltammetric cycle. The information contained in each CSV file comprises 4 different items, listed in the following order: 1.) Applied Potential (V), 2.) Time (s), 3.) WE current (A), 5.) WE potential (V), - E2: A folder containing the cyclic voltammetry data corresponding to electrolyte E2. The folder structure and file organization are identical to those described for E1. It contains three subfolders corresponding to the three experimental repetitions (Rep_1–Rep_3), each including 11 CSV files corresponding to scan rates between 0.005 V·s⁻¹ and 0.1 V·s⁻¹. The structure and contents of the CSV files are the same as those described for E1. - E3: A folder containing the cyclic voltammetry data corresponding to electrolyte E3. The folder structure and file organization are identical to those described for E1, including three repetition subfolders (Rep_1–Rep_3), each containing 11 CSV files corresponding to the different scan rates between 0.005 V·s⁻¹ and 0.1 V·s⁻¹. The data structure inside each CSV file follows the same format described above. - E4: A folder containing the cyclic voltammetry data corresponding to electrolyte E3. The folder structure and file organization are identical to those described for E1, including three repetition subfolders (Rep_1–Rep_3), each containing 11 CSV files corresponding to the different scan rates between 0.005 V·s⁻¹ and 0.1 V·s⁻¹. The data structure inside each CSV file follows the same format described above. METHODOLOGICAL INFORMATION The cyclic voltammetry measurements included in this dataset were performed to characterize the electrochemical behaviour of the Fe³⁺/Fe²⁺ redox couple in different electrolyte formulations considered as potential anolytes for all-iron redox flow batteries. Four different electrolytes were prepared, labeled E1–E4, with compositions described in the DATA & FILE OVERVIEW of this document. For each electrolyte, cyclic voltammetry experiments were performed at scan rates ranging from 0.005 V·s⁻¹ to 0.1 V·s⁻¹. Each measurement consisted of three consecutive voltammetric cycles. The experiments were repeated three independent times at each scan rate. Only the third voltammetric cycle is included in this dataset. The raw electrochemical data were exported directly from the potentiostat software and stored in CSV format, preserving the original experimental information recorded during the measurements. The data contained in each file include the applied potential, measurement time, electrode current, and electrode potential., Optimización del anolito de una batería de todo hierro (OptAnol-FeBat) (PAID-06-23). Universidad Politécnica de Valencia.

Dataset from Electropolymerization of PPy, PEDOT, and PANi on WO3 nanostructures for high-performance anodes in Li-ion batteries

This dataset contains RGB and multispectral point clouds of the Sierra Calderona Natural Park, obtained by UAV digital aerial photogrammetry., Grants BES-2017-081920 and PID2020-117808RB-C21 funded by MCIN/AEI/10.13039/501100011033 and by ESF Investing in your future.

[EN] The RILEM Technical Committee 261-CCF launched in 2015 an international Round-Robin Test (RRT) program to improve the knowledge on the long-term behaviour of cracked Fibre Reinforced Concrete (FRC) sections and assess all the different testing methodologies available. The participation of 19 international laboratories performing creep test following different methodologies in compliance with previously agreed conditions contributed to the success of the RRT. A convention regarding the data collection during the RRT was established to simplify the analysis of results. The RRT provided an extensive database of results from tests performed according to similar procedures and conditions agreed beforehand by the participants. More than 150 parameters and variables were defined and registered during the RRT realisation for each specimen. The long-term tests performed on 124 specimens for one year following four main creep methodologies provided a huge database with more than 15000 data. The analysis of this RRT should support the future proposal of standard test procedures and conditions, defining common criteria for future experimental programs for each test method as well as validation of models to consider creep in the design of FRC structures. The database of the RRT is offered open access to the scientific community as supplementary material of the Round-Robin Test State-of-the-Art Report published by Springer in the RILEM State-of-the-Art Reports series to improve the global knowledge in the long-term deformations of the cracked FRC specimens., This Round-Robin Test (RRT) has been supported by the fibre suppliers Master Builders Solutions (BASF), BEKAERT and ArcelorMittal Fibres. The RRT organizers wish to thank their financial support in the fabrication and delivery of the specimens all over the world. The RRT organizers gratefully thank to the following institutions their participation on this international experimental programme: Universitat Politècnica de València UPV, Universitat Politècnica de Catalunya UPC, OTH Regensburg, Master Builders Solutions (BASF), LEMIT-CIC and Facultad de Ingeniería UNLP, Indian Institute of Technology Madras IITM, NV BEKAERT SA, Tohoku University, ArcelorMittal Fibres, BBRI Belgium Building Research Institute, University of Bologna, Universidade Federal de Rio de Janeiro, École Polytechnique de Montréal, Politecnico di Milano, Sigma Béton, CETU Centre for Tunnel Studies, MEDDE, Stellenbosch University, TSE Technologies in Structural Engineering and VSH VersuchsStollen Hagerbach. The contribution of all TC members and external attendees during both face-to-face and on-line meetings as well as their proposals for the RRT experimental program, their contribution in both the book and the database, and the review of the many drafts of this database is greatly acknowledge. Last but not least, the TC chairman wish to thank to the RILEM Association their guidance during the Technical Committee lifetime and their support for the publication of the different works authored by the TC.

Data collected by satellite tagging females of teh loggerhead sea turtle found attemting to nest in Spanish beaches during teh period 2023-2025; description of teh methdos for tagging may be found in Cardona, L., Abalo-Morla, S., Cani, A., Feliu-Tena, B., Izaguirre, N., Tomás, J., & Belda, E. J. (2024). Identifying the foraging grounds of the new loggerhead turtle nesters in the western Mediterranean. Aquatic Conservation-Marine and Freshwater Ecosystems. doi:10.1002/aqc.4059 Cardona et al 2024.