Dipòsit Digital de la Universitat de Barcelona
El Dipòsit Digital de la Universitat de Barcelona és el repositori institucional que conté en format digital els materials derivats de l'activitat docent, investigadora i institucional de la comunitat universitària.
Enviaments recents
Treball de fi de grauLa biblioteca personal de Joaquim Sala a la Biblioteca Pública Ramon Vinyes i Cluet de Berga: Origen, sentit, tractament i futur(2026-07-22) Tomàs Granero, Lluís; Rubió, Anna (Rubió Rodon); Sala Molas, FinaAquest treball parteix d’una inquietud professional, però també d’una experiència viscuda. Professional, perquè s’emmarca dins els estudis de Gestió d’Informació i Documentació Digital i em permet aplicar coneixements relacionats amb la gestió de col·leccions, els fons personals, la descripció documental, la preservació i la difusió. Però també personal, perquè neix d’un període de pràctiques que em va marcar i que em va ajudar a entendre millor què significa treballar en una biblioteca pública. La Biblioteca Ramon Vinyes i Cluet va ser el lloc on vaig començar a entendre que una biblioteca pública pot ser molt més que un servei: pot ser un espai de memòria, de reconeixement, de transmissió i de comunitat. Des d’aquesta experiència concreta, aquest treball vol mostrar que fons com el de Joaquim Sala no només tenen valor pel que contenen, sinó també pel que representen: la relació entre una persona, una biblioteca i un territori.- ArticleReseña/Review (Morozov, Evgeny, “Los Santiago Boys: El socialismo digital de Salvador Allende”, Verso Libros, ISBN: 979-1-387-87270-0, 230 págs., 2025)(Universidad Complutense de Madrid, 2026-03-26) Casas Romero, JordiEl informático, investigador y periodista Evgeny Morozov, uno de los teóricos más importantes y críticos de la digitalización, recoge en el libro Los Santiago Boys: El socialismo digital de Salvador Allende, editado por Verso Libros, los nueve capítulos de su podcast-documental The Santiago Boys. Dicho podcast se basa en una investigación de más de diez años que reconstruye la historia del gobierno de Salvador Allende y su intento de crear una democracia socialista basada en datos: un socialismo cibernético. El relato, en su mayoría, transcurre cronológicamente durante el mandato de Allende como presidente de la República de Chile. Así, se inicia a finales de 1969, unos meses previos a la victoria de la coalición de la Unidad Popular, y finaliza con el golpe de Estado de Augusto Pinochet, jefe del ejército, el 11 de septiembre de 1973.
- ArticleSea surface temperature updating impacts on WRF simulations during a heatwave period(Elsevier B.V., 2025-05-15) Busquets de Jover, Eulàlia; Udina Sistach, Mireia; Bech i Borràs, Jaume; Mercader Carbó, JordiThis study investigates the effects of sea surface temperature (SST) updating strategy in the Weather Research and Forecasting (WRF) model during a heatwave event over the Northwestern Mediterranean Sea in July 2019. The MM5 revised Surface Layer and Yonsei University Planetary Boundary Layer (PBL) schemes were used and wind field at 10 m, air potential temperature, surface fluxes, and planetary boundary layer height were examined. Generally, the greatest impacts over the sea were observed within 20 km of the shoreline. We found an underestimation of the modeled SST in non-updated SST simulations during the heatwave episode that was propagated into the atmosphere, leading to a cold bias of 2-m potential temperature up to 2.5 K onshore. In heatwave conditions the most common surface layer stability class was very unstable, and its frequency increased when the SST was updated, particularly near the coast, revealing that SST updating leads to greater dominance of thermal turbulent mixing of surface fluxes in the heatwave period studied. Sensible and latent heat fluxes across stability regimes were analyzed, and latent heat flux showed greater sensitivity to SST updating and the highest magnitudes. However, PBL height variations between SST-updated and non-updated simulations presented a greater sensitivity to sensible heat flux. On average, during the heatwave period, the planetary boundary layer height in simulations with updated SST increased by 75 m onshore, compared to a smaller increase of 26 m offshore, which highlights the greater sensitivity in the onshore region and their impact on vertical modeled profiles. These results emphasize the importance of an accurate representation of boundary layer conditions on numerical weather prediction models, as well as illustrating the nonlinear behavior on the surface layer and PBL scheme, particularly important under heatwaves.
- ArticleFuture winter snowfall and extreme snow events in the Pyrenees(Elsevier B.V., 2025-04-01) Bonsoms, Josep; Lopez Moreno, Juan I.; Lemus I Canovas, Marc; Oliva Franganillo, MarcSnowfall is a crucial climate variable in mountainous regions: it influences hydrological and ecosystem dynamics and has a major impact on socioeconomic activities. This study examines the future changes (2024 to 2100) in winter (December, January and February, included) snowfall and extreme snow events in the Pyrenees, using a high-resolution dataset (2.5 km) derived from multiple CMIP5 General Circulation Models (GCMs) under RCP4.5 and RCP8.5 greenhouse gas scenarios, forced with the SAFRAN model. Winter snowfall shifts are examined considering accumulated snowfall (SF), extreme snowfall (Percentile >95th; SF95) per season, and return period levels (RPs) based on fitting Generalized Extreme Value to annually maximum SF. The data indicate an overall decline in SF across the entire mountain range and at all elevations. Trend analysis reveals a statistically significant negative evolution of SF (Tau Mann-Kendall >0.3; p-value ≤0.05) for most of the mountain range under RCP8.5. Projections for the end of the 21st century (2080–2100 period) anticipate reductions ranging from −9 % (RCP4.5; 2500–3000 m) to −29 % (RCP8.5; 1000–1500 m) compared to the historical climate (1960–2006 period). SF95 projections range from +2 % (RCP4.5; 2500–3000 m) to −25 % (RCP8.5; 2500–3000 m) for the same periods. Annual maximum extreme snowfall RPs indicate decreases over the historical period, regardless of the scenario and elevation range. These changes are attributed to warming and declining precipitation (P), with maximum P reductions reaching reduction of −24 % for RCP8.5 (2080–2100 period). Differences among GCMs contribute to a variability of ±20 % around the average multi-model mean. These results anticipate major terrestrial ecosystem changes in the Pyrenees, including significant spatiotemporal changes in hydrological resources potentially affecting millions of people living in large lowland cities.
- ArticleExploring the Intersection of Self-Reported Victimization and Offending: Risk Profiles Among a Representative Sample of Spanish Adolescents(Taylor & Francis, 2026) Pereda Beltran, Noemí; Guerra, CristóbalThe study examines profiles of adolescents based on their experiences of victimization and perpetration over the past 12 months using a representative sample of 4,024 Spanish youth aged 14–17 (M = 15.24; SD = 1.56). Participants were assessed on sociodemographic variables, moral emotions, victimization experiences, violent behavior perpetration, alcohol and pornography consumption, and runaway behavior. Four distinct clusters were identified: “no violence” (59.4%), “victimization only” (32.0%), “polyvictimization and perpetration” (8.1%), and “polyvictimization and polyperpetration” (0.5%). Significant demographic differences emerged, particularly in gender, with males overrepresented in groups involving perpetration. Victim- offenders exhibited elevated levels of risk factors, including moral disengagement, alcohol and pornography use, and runaway tendencies. These findings highlight the nuanced relationships between victimization and perpetration. Adolescents in the most severe profiles (polyvictimization and polyperpetration) were at greater risk of antisocial behaviors. The study emphasizes the necessity for targeted interventions that address the specific needs of each profile. Policymakers and practitioners must design prevention and social intervention programs that consider these diverse profiles, focusing on the intricate interplay between victimization, perpetration, and associated risk factors. These efforts are crucial for mitigating the development of antisocial behavior and providing support to juvenile victims and offenders.