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Multi-vessel placement in multi-chamber inland waterway transport locks using switching Max-Plus algebra
No full textThis paper presents a novel scheduling approach for inland waterway transport (IWT) vessels that must pass through multi-chamber locks. A switching max-plus linear (SMPL) model is built to determine, for each vessel, the most appropriate route, the arrival times at relevant waypoints as well as at the destination, the relative order in which it moves through the network with respect to other vessels, its assignment to certain lock chambers together with other vessels, and its position inside each chamber. The SMPL constraints are translated to mixed integer linear programming (MILP) constraints for the optimization problem to be solvable, and objectives minimizing arrival times or arrival time offsets are defined. The proposed approach is tested on a multi-lock waterway, and its performance is compared to the current state of practice using relevant key performance indicators (KPIs), which allows to demonstrate the superior performance of the proposed approach.Peer ReviewedPostprint (author's final draft
Patrón de selección
No full textVídeos docents de l'assignatura Representació Arquitectònica IV, impartida per Isidro Navarro, PDI de l'ETSABVídeos docentes de la asignatura Representación Arquitectónica IV, impartida por Isidro Navarro, PDI de la ETSA
Semi-supervised image segmentation of colorectal liver metastases in whole slide images using mean teacher and adaptive unlabeled data sampling
No full textThe assessment of desmoplastic histopathological growth patterns (dHGPs) in colorectal liver metastases is a vital prognostic factor, yet current practice relies on subjective visual scoring. While deep learning offers automation, it is hindered by the scarcity of expert-annotated data1. This thesis addresses this bottleneck using a semi-supervised learning framework that leverages limited expert annotations (N=40) alongside a large cohort of unlabeled whole slide images (N=1800+). The proposed methodology integrates a Swin-UnetR architecture within an adapted Mean Teacher framework, augmented by novel entropy-based and adaptive sampling strategies designed to prioritize morphologically complex tissue interfaces. Validated across five cross-validation folds, this approach yielded a statistically significant improvement in dHGP score correlation (r=0.779 vs r=0.747 at p=0.0184) and reduced Mean Absolute Error compared to a fully supervised baseline. Results demonstrate that leveraging unlabeled data reduces false-positive artifacts, enabling more accurate automated scoring. Remaining discrepancies largely reflect the resolution mismatch between discrete visual estimates and continuous algorithmic scoring. This research confirms the viability of semi-supervised learning to overcome annotation scarcity in histopathology.Outgoin
Disseny i anàlisi estructural d’una bicicleta adaptada al cicloturisme
No full textAquest treball final de grau se centra en el disseny i l’anàlisi estructural d’un quadre de
bicicleta de cicloturisme, juntament amb un portaequipatge integrat, amb l’objectiu
d’innovar mitjançant un disseny capaç de suportar una càrrega de transport elevada,
utilitzant eines de disseny assistit per ordinador (CAD) i anàlisi assistida per ordinador
(CAE). El projecte comença amb una anàlisi del mercat per recopilar i comparar les
principals solucions comercials existents en bicicletes de cicloturisme i sistemes de
càrrega, oferint una visió global de les configuracions i dissenys disponibles. A partir
d’aquesta anàlisi, s’han establert els requisits estructurals i funcionals del disseny,
considerant factors com la fiabilitat, la capacitat de càrrega, l’estabilitat i la comoditat en
llargues distàncies. S’ha desenvolupat un model parametritzat en 3D del quadre
mitjançant el programari CATIA V5, adoptant una geometria optimitzada per a la
conducció estable i compatible amb un portaequipatge dissenyat específicament per
maximitzar la funcionalitat de càrrega sense comprometre la integritat estructural.
Posteriorment, s’ha realitzat l’anàlisi estructural del conjunt mitjançant simulacions amb
el mètode dels elements finits (FEM) amb el programari ANSYS®, aplicant càrregues
dictades per la norma EN ISO 4210-6 2014 Cicles – Requeriments de seguretat per
bicicletes. El comportament estructural s’ha avaluat tant amb com sense el
portaequipatge, permetent identificar concentracions de tensió i punts crítics. Els resultats
han confirmat la viabilitat del disseny proposat, amb tensions i deformacions dins els
marges de seguretat establerts. En conjunt, el projecte compleix satisfactòriament els
objectius fixats, integrant les fases de disseny, anàlisi i validació, i ofereix una base sòlida
per a futures millores, optimitzacions o validacions experimentals en el disseny de
bicicletes per a cicloturisme.Este trabajo final de grado se centra en el diseño y el análisis estructural de un cuadro de bicicleta de cicloturismo, junto con un portaequipajes integrado, con el objetivo de innovar mediante un diseño capaz de soportar una elevada carga de transporte, utilizando herramientas de diseño asistido por ordenador (CAD) y análisis asistido por ordenador (CAE). El proyecto comienza con un análisis de mercado para recopilar y comparar las principales soluciones comerciales existentes en bicicletas de cicloturismo y sistemas de carga, ofreciendo una visión global de las configuraciones y diseños disponibles. A partir de este análisis, se han establecido los requisitos estructurales y funcionales del diseño, considerando factores como la fiabilidad, la capacidad de carga, la estabilidad y la comodidad en largas distancias. Se ha desarrollado un modelo parametrizado en 3D del cuadro mediante el software CATIA V5, adoptando una geometría optimizada para una conducción estable y compatible con un portaequipajes diseñado específicamente para maximizar la funcionalidad de carga sin comprometer la integridad estructural. Posteriormente, se ha realizado el análisis estructural del conjunto mediante simulaciones con el método de los elementos finitos (FEM) utilizando el software ANSYS®, aplicando cargas dictadas por la norma EN ISO 4210-6:2014 Ciclos – Requisitos de seguridad para bicicletas. El comportamiento estructural se ha evaluado tanto con como sin el portaequipajes, lo que ha permitido identificar concentraciones de tensión y puntos críticos. Los resultados han confirmado la viabilidad del diseño propuesto, con tensiones y deformaciones dentro de los márgenes de seguridad establecidos. En conjunto, el proyecto cumple satisfactoriamente los objetivos fijados, integrando las fases de diseño, análisis y validación, y ofrece una base sólida para futuras mejoras, optimizaciones o validaciones experimentales en el diseño de bicicletas para cicloturismo.This bachelor's thesis focuses on the design and structural analysis of a touring bicycle
frame, together with an integrated luggage rack, aiming to innovate by enabling the rack
to support a high transport load, using computer-aided design (CAD) and computer-aided
engineering (CAE) tools. The project begins with a market analysis to review and
compare current commercial solutions for touring bicycles and cargo systems, offering
an overview of available designs and configurations. From this analysis, the structural
and functional requirements for a bicycle intended for self-supported touring were
defined, considering factors such as reliability, stability, load capacity, and long-distance
comfort. A parametric 3D model of the bicycle frame was developed using CATIA V5,
adopting a geometry optimized for stability and capable of integrating a purpose-designed
luggage rack. This rack was designed to maximize cargo functionality while maintaining
overall structural integrity. Subsequently, finite element method (FEM) simulations were
carried out using ANSYS® software, applying the loads defined in standard EN ISO 4210
6 2014 Cicles – Requeriments de seguretat per bicicletes. The structural performance of
the frame was evaluated both with and without the luggage rack, allowing the
identification of stress concentrations and critical points. The results confirmed the
feasibility of the proposed design, with deformations and stresses remaining within
acceptable safety limits under all simulated conditions. Overall, the project successfully
fulfils its objectives by integrating the design, analysis, and validation phases, and
provides a solid basis for future developments, optimizations, or experimental validations
in the field of bicycle frame and cargo system design for touring applications
Controlled release of clove oil from chitosan/gum Arabic microcapsules: insights from microstructure and application in multifunctional fabrics
No full textRecently, there has been a growing consumer demand for mosquito-repellent textile materials as a preventive measure against mosquito-borne diseases, such as malaria and dengue. Although these textiles initially exhibit strong repellency, their effectiveness significantly diminishes after repeated washing cycles. In this study, were development of multifunctional fabrics, where the clove essential oil (CEO) encapsulated-chitosan/gum Arabic has been prepared using the complex coacervation and functionalization on textile structures, using the padding method. Moreover, different 100% fiber fabrics (cotton, polyamide, and polyester), two surfactants (Tween® 20 and SPAN® 80), and different molecular weights of chitosan (Ch) were studied for comparison on the microcapsule’s encapsulation properties. A commercially citric acid binder was used for the chemical functionalization of the microcapsules on the textile substrate. The average distribution of microcapsules was studied, and the finished fabrics were characterized for surface morphology, physical–chemical functionalities, thermal properties, conventional textile properties, including release profiles, and finish washing cycle test, investigated by whiteness and color parameters tests conducted according to international standards. The results obtained show a successful CEO-encapsulation reaching a 75.83% maximum of CEO-loaded, and the color properties do not show a significant interference among samples, using a citric acid binder on fabrics functionalization, reaching a 114.27 CIE WI maximum for Cotton fabric, due to the standard detergent used in the wash test. The experimental results of the final EO-release demonstrate the reservoir effect of the CEO, with the low Ch and SPAN® 80 surfactant being more stable to EO-release, especially in polyamide fabric with ~2250 mg/L before and ~175 mg/L after the wash test was performed, respectively. The results of the functionalized fabrics demonstrated long-lasting performance from CEO microcapsules, even after undergoing washing cycle testsThe authors would like to thank PGETEX and PPGNPMat (UFSC-BNU), INTEXTER-UPC, and CAPES-Brazil for supporting this project. This work was funded by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) – Brazil.Postprint (author's final draft
Proyecto QuNet - Redes Cuánticas
No full textDesenvolupament de xarxes quàntiquesDesarrollo de redes cuántica
Añadir datos a los componentes
No full textVídeos docents de l'assignatura Representació Arquitectónica IV, impartida per Isidro Navarro, PDI de l'ETSABVídeos docentes de la asignatura Representación Arquitectónica IV, impartida por Isidro Navarro, PDI de la ETSA
Estudio para el cálculo y análisis de sistemas de presurización de escaleras: aplicación de la normativa UNE-EN 12101-13
No full textEste proyecto analiza el diseño y el cálculo de los sistemas de presurización de escaleras como medida de control de humos en caso de incendio, de acuerdo con la normativa UNE- EN 12101-13. Estos sistemas son esenciales para garantizar que las vías de evacuación permanezcan libres de humo y sean seguras para los ocupantes y los equipos de emergencia. El trabajo presenta una revisión de los fundamentos teóricos de la presurización de escaleras y del marco normativo aplicable, con una comparativa entre la UNE-EN 12101- 6 y la UNE-EN 12101-13, destacando los principales cambios en los criterios de diseño. A partir de este análisis, se desarrolla una herramienta de cálculo automatizada en Microsoft Excel que permite determinar el caudal de diseño del sistema tanto en escenarios con puertas cerradas, basados en el criterio de presión diferencial, como en escenarios con puertas abiertas, basados en el criterio de velocidad del flujo de aire. Paralelamente, se realizan simulaciones computacionales con el software Ventus con el objetivo de analizar el comportamiento del edificio, así como estudiar la distribución de presiones, las velocidades del aire y la influencia de factores físicos como el efecto chimenea. Finalmente, se concluye que el trabajo proporciona una herramienta práctica y eficiente para el dimensionamiento de sistemas de presurización de escaleras conforme a la normativa, facilitando su aplicación en el ámbito profesional y contribuyendo a la mejora de la seguridad contra incendios en edificios
A novel approach to forecasting product end-of-life circularity from material compositions using a hybrid autoencoder-predictor model
No full textConstruction and demolition activities are a major source of industrial waste, yet material end-of-life circularity and traceability remain poorly understood. This study addresses the challenge of forecasting end-of-life pathways from building material compositions by introducing a hybrid autoencoder–predictor model. The approach encodes material profiles into continuous embeddings and considers additional design parameters to predict probable end-of-life scenarios. Trained on 8,680 environmental product declaration-derived samples, the model achieved a mean error of 0.01%, MAE of 3.3%, RMSE of 6.2%, and R² = 0.82. Results identify key materials that enable recycling and highlight the importance of design-for-disassembly and recycled content in guiding end-of- life decisions. Besides, findings also reveal that end-of-life reporting practices are somewhat inconsistent, especially for reuse, filling, reconditioning, and composting, highlighting opportunities for policy and reporting standard enhancements. By enabling probabilistic forecasting of end-of-life outcomes, this tool supports transparent material traceability and informs procurement, policy development, and sustainable design.This research was supported by the Catalan agency AGAUR through its Industrial Doctorate support program (2023 DI 00037), as well as its research group support program (2021 SGR 00341). The authors would like to express their gratitude to Grupo Construcía for supporting this research, and to its consulting firm, Eco Intelligent Growth, for providing the necessary guidance to conduct it. Special thanks are extended to Roberto Ordoyo Romero, Director of Innovation at Grupo Construcía, for overseeing and guiding the objectives of the project on behalf of the company.Peer ReviewedPostprint (published version