Artículos, conferencias, monografías

Esta colección está formada por artículos, conferencias, comunicaciones y otras publicaciones elaborados por miembros de la Universitat Politècnica de València.

En el caso de documentos publicados, antes de incluirlos en RiuNet, el autor debe saber las condiciones en que ha cedido los derechos de explotación de su obra al editor. Aunque la mayoría de los editores permiten el archivo del pre-print (el borrador del texto a publicar antes de la revisión por pares) se recomienda consultar la base de datos Jisc open policy finder para conocer la política sobre derechos de autor de las editoriales internacionales y la base de datos Dulcinea para conocer la política sobre derechos de autor de las editoriales españolas. En caso de duda el autor debe ponerse en contacto con la editorial para conocer su política respecto al archivo en repositorios institucionales.

Permanent URI for this collectionhttps://riunet.upv.es/handle/10251/3829

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Now showing 1 - 20 of 43602

Access status: Abierto ,
La plàstica del Renaixement i del Barroc a les terres de Lleida
(Pagès Editors, S.L., 2007) PUIG SANCHIS, ISIDRO; Yeguas, Joan; Company, Ximo
[CA] Tot i que, com esmentem en el següent epígraf, el Renaixement i el Barroc constitueixen una època històrica fosca en el Bisbat de Lleida i a la resta de Catalunya, el cert és que ens referim a tres-cents anys llargs d¿història. No els podem bandejar. No els podem oblidar. No fóra bo menystenir-los. És veritat, d¿altra banda, que posseïm una migrada constància documental del que artísticament va esdevenir-se arreu del bisbat en aquests tres segles, però en conservem la suficient per comprovar que els avantpassats van continuar construint, arranjant i embellint, tant com van poder, els temples, les ermites i capelles, els oratoris i, òbviament, també, quan podien, si més no ¿sobretot les nissagues i famílies més benestants¿, els casalots particulars. I majoritàriament ho van fer per honorar i donar glòria a Déu. No podem oblidar aquesta premissa bàsica, per més que tothora podríem destriar altres possibles i comprensibles mòbils quelcom menys teocèntrics en la comitència o els encàrrecs artístics d¿aquella època.
Access status: Abierto ,
Un nou temple per a cada poble. L impuls constructiu del Bisbat de Lleida (segles XVI-XVIII).
(Pagès Editors, S.L., 2007) PUIG SANCHIS, ISIDRO
[CA] Amb aquestes paraules l¿arquebisbe de València, Isidoro Aliaga, començava la redacció de les seves Advertencias para los edificios y fábricas de los templos y para diversas cosas de las en ellos sirven al culto divino y a otros ministerios, arran del sínode de l¿any 1631. És un text important que en 149 folis recull l¿essència de l¿arquitectura religiosa valenciana del segle XVII i de tots els béns mobles que conté. D¿una manera o d¿una altra, molt probablement els prelats lleidatans van tenir en compte aquestes premisses o advertències posttridentines, tot i que no necessàriament per mitjà del text de l¿arquebisbe valencià, atès que desconeixem si n¿hi va haver altres de semblants o no. En definitiva, l¿esperit que va moure la construcció dels nous temples tant a València com a Lleida, i a la resta de l¿Estat, és la mateixa.
Access status: Abierto ,
Els Ferrer. Els pintors més emblemàtics del bisbat i la ciutat de Lleida
(Pagès Editors, S.L., 2008) PUIG SANCHIS, ISIDRO
[CA] El segle XV és, sens dubte, l¿època d¿esplendor de la pintura medieval catalana i lleidatana. Els tipus d¿obra més representativa d¿aquesta expressió plàstica són els retaules. Els retaules tenien una clara finalitat didàctica, catequètica i, perquè no, ornamental. Estaven formats per una diversitat d¿escenes que narren els cicles, més o menys complets, de la vida i miracles de Crist, la Mare de Déu i els sants. Normalment era un col·lectiu qui contractava l¿obra i un expert més o menys erudit dictava la iconografia que s¿havia de representar. A vegades els artistes acudien a les fonts tradicionals per desenvolupar-les. Les fonts més importants eren els evangelis canònics (Mateu, Marc, Lluc i Joan), els evangelis apòcrifs (protoevangeli de Sant Jaume, evangeli del pseudo-Mateu, etc.) i la Llegenda Àurea de Iacobus de Voragine escrita en el segle XIII. Els cicles que narraven la història de la salvació s¿iniciaven amb escenes de la infància de Jesús, continuaven amb la seva passió i culminaven amb la mort a la creu i la resurrecció, en definitiva amb la redempció de l¿home.
Access status: Abierto ,
Spiking without Resets: Continuous Integrate-and-Fire Dynamics in Neuronal Circuits
(American Chemical Society, 2026-06-29) Fenollosa Esteve, Roberto; Bisquert, Juan; European Commission; Ministerio de Ciencia e Innovación
[EN] The leaky integrate-and-fire paradigm is widely used to describe spiking dynamics in biological and artificial neurons. However, its implementation typically relies on explicit reset rules or intrinsic mechanisms involving negative differential resistance. Here we address the question: Can spike-like behavior emerge within a fully continuous dynamical framework without such ingredients?. We study a minimal resistive-capacitive circuit coupled to a conductance-activated quasi-linear memristor characterized by a single intrinsic relaxation time scale and an internal state variable. We demonstrate that spiking arises from the nonlinear coupling of the state variable and its voltage-dependent equilibrium value. Rather than being governed by a minimum transition slope in the static current-voltage characteristics, the onset of spiking does not exhibit sharp parametric thresholds but instead depends sensitively on the excitation frequency.
Access status: Abierto ,
Enhancing Vocabulary Acquisition with Mnemonics in a Serious Video Game
(Publicaciones Universidad de Alicante, 2026-01-28) Casañ-Pitarch, Ricardo; Generalitat Valenciana; Universitat Politècnica de València
[EN] The manipulation of virtual objects in video games acts as a form of mnemonics, enhancing information retention through visuals, narratives, and actions. This research aims to evaluate the effectiveness of the video game The Engineer in helping students in a foreign language classroom acquire new vocabulary. 64 industrial engineering bachelor¿s degree students participated in this study, with 38 in the experimental group and 26 in the control group. All students were enrolled in the professional English for industrial engineering (B2) subject, a requirement of their bachelor¿s degree program. Both groups received the same content and classroom hours. However, while the control group reinforced learning through paper-based exercises, the experimental group engaged with the video game The Engineer. To assess their performances, students from both groups completed a vocabulary pre-test in the first lesson, followed by two post-tests: one immediately after the lessons and another one two weeks later. The results showed that the experimental group outperformed the control group in both post-tests. Although scores declined in the second post-test, the experimental group exhibited a less significant drop. In conclusion, these findings suggest that the use of mnemonics in a video game could be effective in assisting students to acquire new vocabulary.
Access status: Abierto ,
Digital reintegration of fragmented wall paintings: 3D texture mapping of historical photographs in the Santos Juanes church restoration
(Elsevier, 2026-01-29) Priego De Los Santos, Enrique; Herráez Boquera, José; Denia Rios, José Luís; Regidor Ros, Jose Luis; Fundación Hortensia Herrero; Universitat Politècnica de València; PARROQUIA DE LOS SANTOS JUANES DE VALENCIA
[EN] One of the main challenges faced during the final phases of the project to reintegrate the wall paintings assembly of the church of Santos Juanes in the city of Valencia (Spain) was achieving a three-dimensional fit of the pictorial program onto the irregular vault of the central nave. These frescoes, painted by the renowned artist Antonio Palomino at the end of the 17th century, were partially damaged by a fire in 1936. A subsequent and poorly executed restoration further damaged the works by removing them from the vault and dividing them into irregular panels, failing to preserve their original appearance and compositional balance. In this new restoration project, digital techniques are being used to return the displaced paintings to their original positions. The virtual reintegration of the iconographic program through the digital processing of historical photographs has allowed for the recovery of the artwork and the enhancement of the few surviving original fragments. The solution presented in this study is based on a methodology that constructs the optimal design so that the surface of each of the panels (parts into which the painting has been divided) adjusts to the curvature and irregular form of the vault. This ensures that the figures and allegorical characters of the paintings retain visual continuity, allowing the viewers to experience the restored paintings as closely as possible to how the painter originally intended. To plan the restoration accurately, it was necessary to develop a detailed, textured 3D model of the architectural surfaces that housed the paintings, the barrel vault of the nave and the quarter-sphere vault of the chancel, onto which any available images from historical photographs taken before the fire were precisely adapted, enabling a virtual reconstruction of Antonio Palomino's original wall paintings.
Access status: Abierto ,
Enhancing Transformer Performance and Portability through Auto-tuning Frameworks
(Springer-Verlag, 2026-02-26) Siwinska, Patricia; Lei, Jie; Castelló, Adrián; Alonso-Jordá, Pedro; Quintana-Ortí, Enrique S.; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION; UNIVERSIDAD POLITECNICA DE VALENCIA
[EN] Transformer-based models such as BERT and GPT2 have become the foundation of many modern applications, yet their execution requires substantial computational and memory resources. To address these challenges, recent advances in compiler technology and hardware accelerators have introduced new opportunities for performance portability. In this work, we evaluate JAX and TVM as high-level frameworks that combine a NumPy-like programming model with Just-In-Time (JIT) or Ahead-of-Time (AOT) code optimization and compilation, enabling efficient execution across CPUs or GPUs, and in the case of JAX, on TPUs as well. We present systematic implementations of the core Transformer encoder and decoder blocks in JAX and TVM and compare their automatically optimized code against NumPy and CuPy baselines. Our experimental study covers heterogeneous hardware platforms (AMD CPU, NVIDIA GPUs, and Google TPUs) and multiple arithmetic precisions (FP32, BF16, INT8, and INT32). Results show that JAX and TVM deliver significant performance improvements over standard libraries, while reducing the programming effort required to adapt to different hardware. These findings demonstrate the potential of JIT- and AOT-oriented frameworks to serve as a portable and efficient solution for deploying Transformer workloads in diverse computing environments.
Access status: Abierto ,
Short-term effect of different inclusion levels of dietary red grape pomace silage on productive performance, milk composition, and health indices in dairy goats
(Elsevier, 2026-08) Galvez-Lopez, Marina; Kiatti, Dieu donne; Atzori, Alberto Stanislao; Roca, Amparo; Fernández Martínez, Nemesio; Romero, Gema; Diaz, Jose Ramon; Agencia Estatal de Investigación; European Regional Development Fund
[EN] This study aimed to evaluate the short-term effect of different diets containing ensiled red grape pomace (RGP) on the health, production performance, and milk quality of lactating dairy goats, as a proposal for a sustainable circular economy. Seventy-two Murciano-Granadina goats at the eighth week of lactation were selected and split into eight groups of nine animals each. The groups were randomly assigned to four isoenergetic and isoproteic diets (two groups/diet) containing RGP (0, 6, 12, and 18% dry matter basis), and the experiment lasted eight weeks. Results showed that the inclusion of RGP in the goats' diet affected dry matter intake (DMI) and water consumption (lower in RGP_18, p < 0.0001, for both variables), without altering body weight, productive performance, or hematological traits. Significant differences were observed in plasma concentrations of amylase-lower in the RGP_18 and RGP_12 groups (p = 0.028)-as well as glucose (p = 0.009) and sodium (p = 0.011), with RGP_12 showing the lowest values compared with the Control group. The ferric reducing antioxidant power (FRAP) was significantly lower in RGP groups (p = 0.035). The diet including 12% RGP revealed the optimal inclusion level, as it maintained DMI and productive performance while reducing milk urea, without impairing metabolic responses or oxidative status.
Access status: Abierto ,
Sensitivity of the Hyper-Kamiokande experiment to neutrino oscillation parameters using accelerator neutrinos
(Springer-Verlag, 2026-02-23) Abe, K.; Afif, M. T.; Ahl Laamara, R.; Aihara, H.; Ajmi, A.; Akutsu, R.; Alarakia-Charles, H.; Ballester Merelo, Francisco José; Hakim, Y. Alj; Alonso Monsalve, S.; Amato, E.; Ameli, F.; Anthony, L.; Araya, A.; Arguello Quiroga, A.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Toledo Alarcón, José Francisco; Leverhulme Trust; European Commission; UK Research and Innovation; Charles University in Prague; Centres de Recerca de Catalunya; National Science Centre, Polonia; Agencia Estatal de Investigación; National Research Foundation of Korea; Japan Society for the Promotion of Science; Ministry of Science and Higher Education, Polonia; Ministry of Education, Science and Technology, Corea del Sur; Ministry of Education, Youth and Sport of the Czech Republic; Consejo Nacional de Humanidades, Ciencias y Tecnologías, México; Ministry of Education, Culture, Sports, Science and Technology, Japón; Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasil
[EN] This paper presents the expected sensitivity to the neutrino oscillation parameters of the Hyper-Kamiokande long-baseline program. The Hyper-Kamiokande experiment, currently under construction in Japan, will measure the oscillations of accelerator-produced neutrinos with thousands of selected events per sample: this corresponds to an increase of statistics of a factor 25-100 with respect to recent results from the currently-running long-baseline neutrino oscillation experiment in Japan, T2K. In the most favorable scenario we will achieve the discovery of Charge-Parity (CP) violation in neutrino oscillation at 5 sigma C.L. in less than 3 years. With 10 years of data-taking, and assuming a neutrino : antineutrino beam running ratio of 1:3, a CP violation discovery at 5s C.L. is possible for more than 60% of the actual values of theCP-violating phase, delta(CP). Moreover, we will measure dCP with a precision ranging from 20., in the case of maximal CP violation, to 6 degrees, in the case of CP conservation. We aim to achieve a 0.5% resolution on the Delta m(32)(2) parameter, and a resolution between 3% and 0.5% on the sin(2)sigma(23) parameter, depending on its true value. These results are obtained by extending the analysis methods of T2K with dedicated tuning to take into account the Hyper-Kamiokande design: the larger far detector, the more powerful beam, the upgraded near detector ND280, and the planned additional Intermediate Water Cherenkov Detector.
Access status: Abierto ,
Creative Regeneration: First Approach and Testing of a Comprehensive Methodology for Designing the Transition to Sustainability
(Common Ground Research Networks, 2026-01-29) Pedro; Saiz Mauleón, María Begoña; Gonzalez-del-Rio, Jimena
[EN] Experience as design practitioners and researchers has led us to identify important gaps between theoretical design frameworks and expectations on the transition to sustainability, on the one hand, and the strategies for real sustainable transformation that are implemented by organizations and territories, on the other. The aim of this study is twofold: first, to understand what lies beyond the different design methodologies that have a potential to contribute to sustainability; and second, to develop and test a comprehensive strategic design methodology¿Creative Regeneration (CR)¿to guide organizations and projects in navigating sustainability transitions. For the first objective, we analyzed nineteen general design methodologies through a systematic review, identifying principles and features that are shared across many of them. Based on our findings, for the second objective, we built CR and tested it with six organizations from diverse sectors, gathering qualitative and quantitative data via surveys, interviews, and participant observation. The results show that CR has the potential to help organizations in their sustainability transitions, by building a better understanding of the organization¿s or project¿s challenges and situation, clarifying long-term visions and goals, and aligning strategic and operational levels. However, it was noticed that participants find it challenging to use this methodology without the guidance of an expert facilitator; that is where the role of the strategic designer fits. This research contributes a novel, comprehensive design methodology for designers, researchers, consultants, and organizations seeking to lead sustainability transitions.
Access status: Abierto ,
A Bayesian approach to planning support on two-lane rural roads for automated vehicles: The role of geometric design in disengagement events
(Elsevier, 2026-05-14) López-Maldonado, Griselda; MOLL MONTANER, SARA; Llopis-Castelló, David; García García, Alfredo; AGENCIA ESTATAL DE INVESTIGACION; European Regional Development Fund
[EN] This paper presents an on-road study examining the interaction between Level 2 automated vehicles (AVs) and the geometric features of two-lane rural roads. These roads constitute the largest percentage of the road network in most countries. Their complex geometric features and lack of design consistency present a significant challenge for the operation of automated vehicles (AVs). Although AV systems aim to reduce driver workload and improve road safety, their performance remains limited on these roads, often resulting in automated system disengagements that require driver intervention. Such disengagements highlight emerging challenges for road administrations regarding road readiness and the safe integration of AVs into existing infrastructure. Based on an on-road study using two instrumented AVs, this study investigates how geometric features of Homogeneous Road Segments (HRS), including Curvature Change Rate (CCRHRS), average radius, tangent length, and average parameter of vertical curves, affect driving system engagement rates. A Bayesian approach was used to quantify the relationship between road geometry indices and AV disengagements. The findings reveal that the primary factor affecting engagement status is CCRHRS, showing that higher values of CCRHRS (>400 gon/km) are associated with AV engagement dropping below 25%, highlighting a direct impact of geometric complexity on AV reliability. The other geometric indices have a moderate positive effect. The findings underscore that road geometry significantly affects AV reliability. These findings have significant implications for infrastructure planning and policy. By identifying geometric thresholds that compromise AV functionality, this research supports the definition of Operational Road Sections (ORS) aligned with Operational Design Domains (ODD). The proposed model offers a practical tool for road administrations to assess road suitability for AV deployment, inform upgrading priorities, and establish design guidelines that facilitate the safe integration of AV technologies into existing rural networks. As automation advances, aligning infrastructure design with AV capabilities becomes essential for equitable and effective transport policy.
Access status: Abierto ,
'Trade?' - The discourse of online sexual harmful exchanges between children
(Elsevier, 2026-07) Lorenzo-Dus, Nuria; Perkins, Keighley; Themelidis, Leonie; Agencia Estatal de Investigación; Higher Education Funding Council for Wales
[EN] This study provides the first examination of the language practices underpinning online sexual harmful exchanges (OSHE) between children, focusing on interactions involving child sexual exploitation and abuse material (CSEAM). While research on OSHE has grown, its communicative dimension remains underexplored, despite language being central to these exchanges. Drawing on a corpus of 227 textual fragments embedded within 28,000 words of chat logs shared by UK law enforcement, we apply a pragmaticsbased framework combining speech act theory and facework analysis. Our findings reveal two dominant discursive behaviours: (i) discussing CSEAM content and (ii) transmitting CSEAM. Discussion sequences were characterised by pervasive othering of depicted children, realised through homogenisation, pejoration, and sexualised evaluations. Transmission sequences frequently employed directive speech acts, often framed as lowimposition requests using conventionalised indirectness, alongside face-saving strategies aimed at reinforcing in-group cohesion. These patterns suggest a troubling normalisation of cybersexual violence within peer-to-peer exchanges. We argue that understanding the linguistic mechanisms sustaining OSHE between children is critical for developing prevention resources and counter-narratives. The study also highlights ethical and methodological challenges in researching sensitive digital interactions. (c) 2026 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Access status: Abierto ,
Evaluating visual mathematics in multimodal LLMs: a multilingual benchmark based on the Kangaroo tests
(Springer-Verlag, 2026-02-12) Igualde-Sáez, Arnau; Rhomrassi-Amhar, Lamyae; Ahsini Ouariaghli, Yusef; Vinuesa, Ricardo; Hoyas, Sergio; García Sabater, José Pedro; Fullana Alfonso, Màrius Josep; Conejero, J. Alberto; European Commission; Generalitat Valenciana; Agencia Estatal de Investigación; European Regional Development Fund; Universitat Politècnica de València
[EN] Multimodal Large Language Models (MLLMs) promise advanced vision-language capabilities, yet their effectiveness in visually presented mathematics remains underexplored. This paper analyses the development and evaluation of MLLMs for mathematical problem-solving, focusing on diagrams, multilingual text, and symbolic notation. The computational demands of evaluating these large-scale models across multilingual datasets necessitate high-performance computing infrastructure, as systematic benchmarking of state-of-the-art MLLMs requires distributed processing of thousands of inference requests and parallel evaluation across multiple model architectures. We then assess several models-including GPT-4o, Pixtral, Qwen-VL, Llama 3.2 Vision variants, and Gemini 2.0 Flash-in a multilingual Kangaroo-style benchmark spanning English, French, Spanish, and Catalan. Our experiments reveal four key findings. First, overall accuracy remains moderate across geometry, visual algebra, logic, patterns, and combinatorics: no single model excels in every topic. Second, whilst most models see improved accuracy with questions that do not have images, the gain is often limited; performance for some remains nearly unchanged without visual input, indicating underutilisation of diagrammatic information. Third, substantial variation exists across languages and difficulty levels: models frequently handle easier items but struggle with advanced geometry and combinatorial reasoning. Notably, Gemini 2.0 Flash achieves the highest accuracy on image-based tasks, followed by Qwen-VL 2.5 72B and GPT-4o, though none approach human-level performance. Fourth, a complementary analysis aimed at distinguishing whether models reason or simply recite reveals that Gemini and GPT-4o stand out for their structured reasoning and consistent accuracy. In contrast, Pixtral and Llama exhibit less consistent reasoning, often defaulting to heuristics or randomness when unable to align their outputs with the given answer options.
Access status: Embargado ,
Intravaginal GnRH analogues in rabbits: Fertirelin as the most effective option for ovulation induction
(Elsevier, 2026-05-12) Castillo, Juan-José; Vicente Antón, José Salvador; Marco-Jiménez, Francisco; Viudes-de-Castro, María Pilar; European Regional Development Fund; Ministerio de Ciencia e Innovación
[EN] Rabbits are reflex ovulators that require exogenous hormonal stimulation, typically a Gonadotropin-releasing hormone (GnRH) analogue, to induce ovulation during Artificial Insemination (AI). While intramuscular injection is the reference standard, intravaginal administration via semen supplementation offers welfare advantages by reducing handling. However, this route often requires higher doses due to rapid proteolytic degradation. This study evaluated three GnRH analogues (fertirelin, buserelin, and deslorelin) administered intravaginally in New Zealand White rabbits, assessing on ovulation induction, reproductive performance, and the minimum effective concentration. Three experiments were performed, including direct ovulation assessment by laparoscopy and evaluation of delivery rate and prolificacy in lactating and non-lactating does. The semen extender included 20 mM EDTA to enhance hormone stability. Ovulation frequency and delivery rate were significantly affected by the analogue used (p < 0.05). Fertirelin consistently showed the highest efficacy, achieving ovulation and delivery rates equivalent to the intramuscular control, even at a reduced dose of 1 ¿g. Deslorelin showed intermediate efficacy, whereas intravaginal buserelin yielded the lowest results. Non-lactating does showed higher delivery rates than lactating ones (P < 0.05), however, no significant interaction was detected between analogue type and physiological status, indicating consistent fertirelin efficacy across reproductive conditions. Although no-significant (p = 0.086), a biological trend suggested that the relative advantage of fertirelin may become pronounced under demanding physiological conditions such as lactation. Neither analogue nor physiological status influenced total or live litter size. The stable performance of fertirelin irrespective of physiological condition supports its superior receptor affinity, making it a promising candidate for welfare-oriented intravaginal AI protocols in rabbits.
Access status: Abierto ,
A review of internet censorship: Modern measurement and circumvention techniques
(Elsevier, 2026-11) Grubl, Thomas; Enguix-Andrés, Francisco; Stiller, Burkhard; European Commission; Agencia Estatal de Investigación; European Regional Development Fund
[EN] As Internet censorship continues to be deployed across a number of nation-states, understanding its scope and underlying mechanisms is more important than ever. Consequently, research on censorship measurement and circumvention has attracted growing academic interest, particularly in recent years. This article provides an overview of the current state of the art in the field of Internet censorship measurement and circumvention research. First, a brief overview of the fundamentals is provided, followed by an in-depth analysis of 146 con temporary Internet censorship measurement and circumvention studies, predominantly those published within the last ten years, by applying a semi-systematic literature review methodology. Subsequently, the review briefly summarizes the ethical considerations in the field, it visualizes the geographical focus of censorship measurement studies, and it provides an overview of Internet protocols used to measure censorship. In addition, it presents a tax onomy of censorship circumvention tools, analyzes their key characteristics, and examines the prevalence of the underlying network protocols used in circumvention tools. The findings suggest that, while there are numerous solutions for circumventing censorship, many are niche or theoretical, and their practicality remains unknown. Although there is an observable trend toward large-scale longitudinal censorship measurement studies, the real-world effectiveness of (academic) censorship circumvention methods is rarely evaluated. Since both censorship measurement and circumvention research go hand-in-hand, there is an increasing number of measurement studies which directly translate their findings into practical circumvention strategies.
Access status: Abierto ,
Preliminary investigation of recent sediments and benthic microfauna from organic-rich subtidal bottoms of the Ría of Vigo (NW Spain)
(Sociedad Geológica de Esapaña, 2026) Gardoki, Jon; Cearreta, Alejandro; Sáez-Muñoz, Marina; Garcia-Artola, Ane; Irabien, Maria Jesus; Eusko Jaurlaritza; Agencia Estatal de Investigación
[EN] The recent sedimentary record of the middle Ría of Vigo has been analysed using 2 subtidal short cores. These present fine-grained sediment facies since the early 1960s, high benthic foraminiferal densities, and elevated abundances of infaunal detritivore taxa. These features suggest a high influx of organic matter and suboxic conditions at the water-sediment interface. Paleoecological reconstructions in coastal systems, where natural processes such as upwelling and shallow gas seeps interact, are vital for developing adaptative management strategies in response to global change.
Access status: Abierto ,
Two-stage process combining N2O decomposition and ethane ODH over a MoVTeNbO-M1 catalyst
(Elsevier B.V., 2026-08) Sanchez-Garcia, Ginebra; De Arriba-Mateos, Agustín; Moreno-Torralbo, Beatriz Maria; Dejoz, Ana M.; Sanchez-Tovar, Rita; Solsona, Benjamin; López Nieto, José Manuel; Generalitat Valenciana; Agencia Estatal de Investigación; Ministerio de Ciencia, Innovación y Universidades
[EN] Multicomponent MoVTeNbO catalysts containing the orthorhombic M1 phase are highly active for the oxidative dehydrogenation (ODH) of ethane using O2 as oxidant, but their performance with N2O is strongly limited by the low efficiency of N2O decomposition capacity of the M1 catalyst. To overcome this limitation, we propose a strategy based on decoupling N2O decomposition from ethane oxidative dehydrogenation in a tandem reactor; in which N2O is decomposed in an upstream bed prior to contacting ethane with the M1 catalyst. Two different N2O decomposition catalysts were evaluated, i.e., CeO2 and a Cs-doped cobalt oxide (Cs-Co3O4), along with M1 catalyst. While with CeO2 the catalytic performance of the M1 catalyst was improved (by efficiently generating reactive oxygen species from N2O), with the Cs-Co3O4 we observed near-complete N2O conversion, leading to significantly higher ethane conversion and enhanced olefin yields of the subsequent M1 catalyst. In addition, different reactor configurations show that physical separation of both processes is essential to maximize performance, enabling high ethane conversion and ethylene selectivity at moderate temperatures. Characterization of fresh and spent catalysts indicates that performance is governed by the dynamic redox state of the M1 surface, strongly dependent on the oxidizing environment. These results demonstrate that decoupling oxidant generation from hydrocarbon conversion is an effective strategy for N2O valorization and selective ethane ODH.
Access status: Abierto ,
A viroid-like RNA can be transmitted among different Trichoderma species affecting their antagonistic capacity
(American Society for Microbiology, 2026-05-13) Formiglia, Cristina; Forgia, Marco; Navarro, Beatriz; Di Serio, Francesco; Serale, Nadia; Oufensou, Safa; Balmas, Virgilio; Migheli, Quirico; Miotti, Niccolo; Olga; Bono, Federica; La Peña Del Rivero, Marcos De; Turina, Massimo; European Commission
[EN] Viroids are small, circular non-coding RNAs that autonomously replicate in plants, exploiting host cellular machinery for replication and spread. Recent studies reveal that viroid-like agents can infect filamentous fungi, suggesting cross-kingdom interactions. In this study, we report the discovery and the characterization of TsvlRNA1 in Trichoderma spirale. TsvlRNA1 is a 712-nt-long viroid-like RNA containing a hammerhead ribozyme in one polarity strand. Bioinformatic data, molecular validation, and reverse genetics experiments demonstrate that TsvlRNA1 is circular with an active ribozyme essential for replication. TsvlRNA1 replicates autonomously and transmits between Trichoderma species, eliciting 20-22 nt viroid-derived small RNAs consistent with RNA silencing targeting. The biocontrol capacity of Trichoderma against Rhizoctonia solani is variably modulated by TsvlRNA1, with effects ranging from positive to negative depending on host strain. In T. spirale, data suggest that TsvlRNA1 negatively affects antagonistic potential. TsvlRNA1 transmission via horizontal routes is prevalent, and the viroid-like RNA fails to infect plant hosts experimentally. These results highlight the as-yet underappreciated ecological and functional diversity of viroid-like agents in fungi, with implications for fungal biology, biocontrol, and genotype-phenotype relationships in eukaryotes.IMPORTANCESpecies of the fungal genus Trichoderma play a central role in sustainable agriculture by controlling fungal plant pathogens and supporting plant growth. For this reason, Trichoderma-based products represent a substantial share of the global market for microbial biofungicides. Viroids are the smallest known infectious agents, and their presence in filamentous fungi has only recently been discovered. Consequently, little is known about their biology, transmission, or interactions with fungal hosts. In this study, we describe TsvlRNA1, a viroid-like RNA associated with T. spirale, representing only the second viroid-like RNA to be biologically characterized in fungi. We show that TsvlRNA1 can influence the ability of Trichoderma to inhibit Rhizoctonia solani, a major plant pathogen, demonstrating its biological relevance. Unexpectedly, TsvlRNA1 can be transmitted between different Trichoderma species. This finding raises concerns about the possible transfer of genetic traits between fungi, including potentially those related to fungicide resistance, with important implications for agricultural biocontrol.
Access status: Abierto ,
Phenolic-modified bacterial nanocellulose composites with antimicrobial and antioxidant activity for implantable biomaterials
(Elsevier, 2026-10) Melro, Liliana; Alves, Catia; Fernandes, Marta; Fernandes, Rui D. V.; Pereira, Adriana; Moldes, Diego; Rodrigues, Ana Cristina; Sencadas, Vitor; Mitu, Bogdana; Satulu, Veronica; Lourenco, Jose; Pace, Giorgio; Ribeiro-Martins, Luis Amaro; Gómez Ribelles, José Luís; Salgado, Antonio J.
[EN] were incorporated into both freeze-dried and never-dried BNC samples, with thicknesses of 1 and 3 mm. To comprehend the incorporation of the KL and OP extracts onto the porous membrane, the pore size of untreated BNC was measured by porometry (197 nm). The size of KL and OP particles was below 0.3 mu m2 as observed using Scanning Transmission Electron Microscopy (SEM). The modification of BNC with these active agents was carried out through an exhaustion process, and the resulting composites were characterised using various analyses, including morphological, chemical, physical, thermal, and biological assessments. Considering the use of cranium and postcranium implants, all BNC composites demonstrated a desirable residual release, which aids to minimise cytotoxicity, while preserving biological properties. The composites exhibited antimicrobial activity, particularly the OP-based composites, showing greater effectiveness against Staphylococcus aureus (with a 3 mm freeze-dried sample, obtaining 2.5 log reduction) and MS2 (both 1 and 3 mm never-dried samples, achieving 4.2 log reduction). In addition, the antioxidant properties were confirmed, reaching a maximum of 77 and 72% for freeze-dried BNC/OP and BNC/KL, respectively. Overall, these exploratory findings highlight a strong potential for bio-based implant applications.
Access status: Cerrado ,
Todos los caminos llevan a Roma. Italia y la (R)evolución artística de Joan de Joanes
(Sílex ediciones S.L, 2021) PUIG SANCHIS, ISIDRO; Herrero-Cortell, Miguel Ángel
[ES] La historiografía en torno a Joan de Joanes ha aducido una falta consenso acerca de una posible estancia en Italia. Prácticamente desde el siglo xvii, hay quienes defienden la presencia del pintor en dicho territorio, y quienes la niegan, esgrimiendo, en ambas direcciones, argumentos que no pueden obviarse. Es una cuestión que, en definitiva, resulta crucial para desentrañar el galimatías que la misma historiografía ha provocado, al confundir repetidamente, hasta nuestros días, las figuras de Joanes y su padre, Vicent Macip.

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