97828 research outputs found
Sort by
Sistema inteligente de triaje y análisis de licitaciones públicas mediante scraping adaptativo e IA generativa
No full textTreball de Final de Grau en Intel·ligència Robòtica. Codi: IR2138. Curs acadèmic 2024-2025Este trabajo presenta una solución automatizada para la clasificación de licitaciones públicas mediante técnicas de parsing y análisis inteligente de texto. A través de la integración de modelos de lenguaje de última generación y una arquitectura modular basada en FastAPI, SQLite y React, se ha logrado reducir drásticamente el tiempo invertido en tareas repetitivas sin comprometer la calidad del análisis.
El sistema ha sido validado con datos reales y mediante pruebas con usuarios, alcanzando una precisión F1 del 91 %, y ha demostrado su utilidad práctica al lograr un ahorro medio de 4 horas semanales en tareas manuales.
Además, se ha diseñado un flujo de despliegue local accesible, acompañado de documentación técnica, pruebas básicas y herramientas de visualización. Esta propuesta sienta las bases para futuras ampliaciones como el análisis automático de pliegos mediante OCR o la integración de dashboards de inteligencia comercial.This Bachelor’s Thesis presents the design and implementation of a full-stack platform that automates the end-to-end processing of Spanish public tenders. The system continuously ingests subscription e-mails, performs adaptive scraping, deduplicates records via the official tender ID, applies an initial deadline filter and a semantic triage powered by a Large Language Model (Groq LLM). Data are persisted in SQLite and displayed through a responsive React/MUI dashboard that supports manual validation, filtering and deletion as well as a real-time status console.
An 82 % reduction in manual effort is demonstrated on 300 real e-mails while achieving 92 % accuracy in the «fit / no-fit» prediction. Architectural decisions, prompt-engineering strategies and validation metrics are reported. Future work includes full OCR processing of tender documents and economic-risk scoring
The Second-Hand Market as a Pure Exchange Economy: A Microeconomic Analysis of the Wallapop Case
No full textTreball Final de Grau en Economia. Codi: EC1049. Curs acadèmic: 2024/2025This paper analyzes the digital second-hand market as a pure exchange economy, using the platform Wallapop as a case study. Based on a theoretical review of the concepts of market, subjective value, risk, and bargaining power, it proposes a bilateral bargaining model that incorporates three key variables: agents’ subjective valuations, their perception of risk, and their level of patience. Through a series of comparative scenarios, it is shown how these variables determine both the feasibility of exchange and the distribution of surplus. The results demonstrate that even in the absence of formal regulation, C2C markets can function efficiently due to internal adjustment mechanisms among agents. Finally, the limitations of the model are discussed, and future research directions are proposed, including dynamic reputation systems and the endogenization of valuations
The incidence of COVID-19 disinformation among citizens in the U.S., India, Brazil, and Spain
No full textDisinformation has become one of the most substantial problems in modern societies. This research aims to analyze the reception of disinformation shared in digital platforms, its effects on citizens, and the formulas to combat disinformation in the context of COVID-19, as well as the sociodemographic and political factors that determine them. An online survey (n = 2803) was developed for citizens of Spain, the U.S., Brazil, and India. Results show that disinformation had a moderate effect on the users’ attitudes, generating an increase in mistrust towards the media and politicians and an increase in belief in conspiracy theories
Ethylene signaling is essential for mycorrhiza-induced resistance against chewing herbivores in tomato
No full textArbuscular mycorrhizal (AM) symbiosis can prime plant defenses, leading to mycorrhiza-induced resistance (MIR) against different attackers, including insect herbivores. Still, our knowledge of the complex molecular regulation leading to MIR is very limited. Here, we showed that the AM fungus Funneliformis mosseae protects tomato plants against two different chewing herbivores, Spodoptera exigua and Manduca sexta. We explored the underlying molecular mechanism through genome-wide transcriptional profiling, bioinformatics network analyses, and functional bioassays. Herbivore-triggered jasmonate (JA)-regulated defenses were primed in leaves of mycorrhizal plants. Likewise, ethylene (ET) biosynthesis and signaling were also higher in leaves of mycorrhizal plants both before and after herbivory. We hypothesized that fine-tuned ET signaling is required for the primed defense response leading to MIR. ET is a complex regulator of plant responses to stress and is generally considered a negative regulator of plant defenses against herbivory. However, ET-deficient or insensitive lines did not show AM-primed JA biosynthesis or defense response, and were unable to develop MIR against any of the herbivores. Thus, we demonstrate that hormone crosstalk is central to the priming of plant immunity by beneficial microbes, with ET fine-tuning being essential for the primed JA biosynthesis and boosted defenses leading to MIR in tomato
Seeds of Change : exploring the transformative effects of seed priming in sustainable agriculture
No full textThe threats posed by climate change on agriculture at a global scale have fostered researchers to explore new and efficient strategies to ensure stable and safe food production. These new strategies must not only be efficient in reducing yield loss but also comply with environmental and consumer safety regulations, which particularly refer to restrictions to pesticide application as well as the implementation of genetically modified organisms, including CRISPR/Cas edited lines. Among other approaches, priming constitutes an easier and relatively cheaper strategy to cope with the effects of abiotic and biotic stresses by boosting plants' endogenous potential. Particularly, pre-sowing seed priming has proven effective in improving germination and seedling establishment as well as tolerance to environmental and biotic factors throughout the plant's life cycle, exhibiting clear long-lasting effects. This tolerance response to a wide range of adverse factors is associated with physiological, metabolic and genetic mechanisms and responses at the seed level and subsequently in the established plant. The genetic and epigenetic mechanisms enabling this tolerance response in plants and their subsequent generation, as a transgenerational effect, will be reviewed. Finally, the potential of the different seed priming approaches contributing to an ecologically and economically more sustainable agriculture will be discussed.Funding for open access charge: CRUE-Universitat Jaume
Graphene as a Suitable Support for Nickel Nanoparticles Functionalized with NHC Ligands in Dehydrogenation of Alcohols
No full textIn this paper, we describe a bottom-up synthesis of nickel nanoparticles (NiNPs) functionalized with N-heterocyclic carbene ligands and immobilized onto reduce graphene oxide (rGO). This tailored synthetic approach provides insights into the physical and chemical factors influencing NiNP formation and properties. The hybrid material (metal nanoparticles + organic ligand + graphene) is prepared starting from a well-defined nickel complex that is decomposed in a controlled manner providing ligand-decorated metal nanoparticles under mild conditions. The resulting NiNPs are spherical, with a small average size distribution (3.7 ± 0.9 nm). This hybrid material (NiNPs/NHC@rGO) is an efficient catalytic material for the dehydrogenation of alcohols to produce carbonyls with the concomitant release of molecular hydrogen. We explore its catalytic properties, substrate scope, and recyclability. Furthermore, X-ray photoelectron spectroscopy analysis reveals the material's evolution over multiple catalytic cycles. The reusability of NiNPs on graphene represents a significant advancement in the design of nickel-based catalytic materials.Funding for open access charge: CRUE-Universitat Jaume
Eficacia del entrenamiento metacognitivo en la recuperación psicosocial de personas con esquizofrenia. Una revisión sistemática
No full textTreball Final de Màster Universitari en Rehabilitació Psicosocial en Salut Mental Comunitària. Codi: SAX014. Curs acadèmic: 2024-2025Este trabajo tiene como objetivo revisar la evidencia disponible sobre el impacto del entrenamiento metacognitivo (EMC) en la rehabilitación psicosocial de personas con esquizofrenia. A través de una revisión sistemática de estudios controlados aleatorizados, se han analizado variables como el funcionamiento social, la calidad de vida, el funcionamiento global y la inserción laboral. Los resultados sugieren que el EMC puede contribuir a mejorar el funcionamiento social y general, mostrando también efectos prometedores en el ámbito laboral y en la percepción de calidad de vida, aunque con cierta variabilidad entre los estudios. En conjunto, los hallazgos apuntan a que el EMC es una intervención útil dentro del proceso de recuperación, si bien es necesario seguir investigando con diseños más sólidos y centrados en variables funcionales que permitan evaluar su aplicabilidad en la práctica clínica.This paper aims to review the available evidence on the impact of metacognitive training (MCT) on the psychosocial rehabilitation of people with schizophrenia. Through a systematic review of randomized controlled trials, variables such as social functioning, quality of life, overall functioning, and job placement were analyzed. The results suggest that MCT may contribute to improving social and overall functioning, also showing promising effects in the
work environment and on perceptions of quality of life, although with some variability between studies. Overall, the findings suggest that MCT is a useful intervention within the recovery process, although further research is needed with more robust designs focused on functional variables to assess its applicability in clinical practice
Reseña de: Del Valle Calzada, Estrella. El acaparamiento de tierras como amenaza en auge para los derechos humanos. Prólogo de José Elías Esteve Moltó. Tirant lo Blanch, Valencia, 2024, 429 p
No full textResolving Peak Overlap in HPLC Analysis of Glycerol Oxidation Products by Utilizing Various Detectors: Application to BiVO4 Photoanodes
No full textGlycerol, often considered a waste byproduct of biodiesel production, holds the potential for conversion into chemicals of varying economic value, such as dihydroxyacetone (DHA) and formic acid (FA). Hence, accurate identification and quantification of glycerol oxidation reaction (GOR) products are crucial for glycerol valorization research and practical deployment. High-performance liquid chromatography (HPLC) is the preferred analytical method for these purposes due to its proficiency in separating and quantifying components in liquid mixtures, even in the presence of diluted solutes. On the other hand, peak overlap in chromatograms, especially among glycerol, DHA, and FA, poses a notable challenge in the analysis of GOR products. This study introduces a quantification method aimed at resolving peak overlaps in HPLC analysis of GOR products. Initially, we examine the optical properties of glycerol and GOR products to identify optimal wavelengths for spectrophotometric HPLC analysis and detection. Subsequently, we propose an algebraic approach to resolve the peak overlap of glycerol, DHA, and FA using various detectors, including the refractive index detector (RID) and the variable wavelength detector (VWD). This method is applied to analyze the GOR products of undoped, nonco-catalyzed nanoporous BiVO4 photoanodes, which have shown an intrinsic catalytic activity toward GOR products in previous studies
Acción Católica de la Mujer and the control of morality. Film screenings in Castellón in the 1920s*
No full textIn the strategy adopted by the Catholic hierarchy in the late nineteenth and early twentieth centuries to mobilise its followers in order to counteract the influence of currents it considered harmful to “social morality” and the maintenance of its power; women were given a new leading role. Militant Catholic women were to become essential to the “re-Catholization” of the public space by taking on the role of “social mothers,” transcending the private space to which they had hitherto b een relegated. Their role as mothers extended beyond the family sphere to occupy a pre-eminent role in the social sphere. Hence the significant involvement of Acción Católica Femenina (Women’s Catholic Action) in Castellón in the 1920s, which sought to influence the authorities to control the type of public spectacles that were performed and shown in the city, among which film screenings were a major concern