Depósito Académico
Permanent URI for this communityhttps://hdl.handle.net/10171/1
Las colecciones que forman el Depósito Académico se asemejan a la estructura organizativa de la Universidad de Navarra a fecha de 2010: Facultades, Departamentos, Escuelas, etc.
Para asegurar la identidad de las colecciones, los cambios en los organigramas, posteriores a esa fecha, no se reflejan en el area de Depósito Académico. Si tiene dudas en sus búsquedas puede ponerse en contacto con dadun@unav.es, o realizar una búsqueda a través de 'Título' o 'Autor'
See
14903 results
Results
- Participatory culture in Spain: interactions between art, architecture, and design in the 1970s(2024) Fernández-González, D. (Dailey)Abstract: At the beginning of the 1970s in Spain, after the social opening derived from the economic policies of Franco’s dictatorship in the 1950s, two public, international, and participatory events were organized: the VII International Council of Societies of Industrial Design (ICSID) Congress in Ibiza, in 1971, and the Pamplona Encounters, in 1972. Both events are now important references for understanding the changes in the consideration of public participation by artists, designers, and architects in the region, motivated both by international trends and by their own particular contexts. Both the Ibiza Congress and the Pamplona Encounters encouraged the creation of ephemeral scenarios to debate issues such as the role of art in the community, the social work of the creator, the change in the conception of the public now understood as a co-author. These artistic experiments created “microenvironments” of freedom and participation in a climate of great political tension, thus anticipating the transition to democracy that would occur a few years after the death of dictator Francisco Franco in 1975.
- A otro perro con ese hueso: modelo fraseológico para el rechazo en la historia del español(CSIC, 2024) Pérez-Salazar-Resano, C. (Carmela)En estas páginas se ofrece un estudio sociopragmático, con perspectiva histórica, de un grupo de fórmulas de rechazo en español. A través de los textos de las bases de datos de la Real Academia Española y a partir de la información que ofrecen diccionarios y repertorios publicados entre los siglos xv y xxi, se describen cuatro secuencias que se ajustan a un modelo sintáctico-semántico común. El análisis histórico descubre, en las de más recorrido, la ampliación de valores pragmáticos a través del tiempo; asimismo, permite observar en algunos contextos la relación de estas fórmulas con la (des)cortesía, e incluso su vinculación con determinados estados emocionales del hablante.
- Air lime renders with microencapsulated phase change materials: assessment of microstructural and thermal properties(Elsevier, 2024-11-22) Alvarez-Galindo, J.I. (José Ignacio); Rubio-Aguinaga, A. (Andrea); Navarro-Blasco, I. (Iñigo); Fernandez-Alvarez, J.M. (José María)Microencapsulated phase change materials (PCMs) have been successfully integrated into air lime-based rendering mortars to enhance thermal properties, aiming to boost the thermal efficiency of the buildings in which are applied. Two microencapsulated PCMs, with melting points at 18℃ and 24℃, were seamlessly introduced into fresh rendering mortars in varying proportions (5%, 10%, and 20% by weight of lime), in formulations that include different chemical additives, such as a superplasticizer (polycarboxylate ether) and an adhesion enhancer (starch-based additive). In some mixes, metakaolin (MK) was also added as a mineral admixture. Starch addition was seen to promote the formation of aragonite and vaterite (calcium carbonate polymorphs), facilitating the smooth integration of microcapsules within the lime matrix. Hotbox simulations with tested materials containing as low as 0.01 - 0.04 g of PCM per gram of dry mortar, yielded outstanding energy efficiency values (822.4 and 732.8 kJ/m2, respectively, for PCMs with melting points at 18℃ and 24℃). Temperature attenuations of up to 6.1°C during the heating stage and up to 3.9°C during the cooling stages were observed. This outcome not only emphasizes the potential for enhancing thermal efficiency through PCM incorporation into air lime renders but also hints at a remarkable future for energy-efficient construction materials.
- An enhanced methodology to improve a basic electrical and instrumentation laboratory session(Institute of Electrical and Electronics Engineers, 2020) Pérez, N. (Noemí); Rezola-Garciandia, A. (Ainhoa); Caballero, D. (Damian); Solar, H. (Hector); Macayo, J. (José)First year students have shown difficulties understanding basic electrical, instrumentation and electronic concepts. In this context, traditional laboratory work is considered as old-fashioned and not very useful for them. In addition, an important part of the time in the lab is spent giving explanations about the basic functioning of measurement instruments and not actually working on the lab experiments. Also, in laboratories with many students the waiting time for the help of the professor is often long and most of the questions are repeated group by group and year by year. To overcome all these issues, we present an improvement of a traditional instrumentation lab practice with an interactive and visual platform that allows students to associate electrical concepts with real day life elements. Self-explaining videos of all the instrumentation elements aid students to be better prepared for practical work before class and to get an immediate on demand help while they are in the lab. This way, the time they are waiting for help is reduced, making the most of the lab practices.
- A new practical approach for a basic electrical instrumentation lab to enhance student engagement and performance(Instituto de Óptica "Daza de Valdes", Instituto de Relaciones Internacionales "Daza de Valdes", 2024) Pérez, N. (Noemí); Beriain, A. (Andoni); Solar, H. (Hector); Rezola-Garciandia, A. (Ainhoa)Basic energy and electricity concepts are often misunderstood by first-year engineering students. One of the main reasons for this is that these concepts are perceived as abstract, making it challenging for students to relate them to real-life situations. Experimental laboratories are designed to help students delve deeper into these concepts. However, the demand for more visual aids by students, coupled with their limited ability to grasp complex ideas, often leads to the perception that some labs are outdated and reinforces misconceptions. To address this issue, this article introduces a novel laboratory workbench and methodology aimed at enhancing basic electrical energy and instrumentation laboratory sessions. The approach utilizes a more visual and interactive platform that enables students to connect electrical concepts with real-life elements. Prior to attending the class, students watch instructional videos that demonstrate the practical procedures, following the Flipped Learning strategy. The results of this study reveal that students felt more confident during the laboratory sessions and exhibited a more active attitude, actively asking questions and defending their viewpoints. Professors also observed that time was utilized more effectively, allowing for a better understanding of topics and clarification of confusing content. Overall, the proposed lab sessions significantly improve the learning experience of first-year Physics students and foster their autonomy in learning.
- A CFD-based compartmental modelling approach for long-term dynamic simulation of water resource recovery facilities.(2024-07) Sanchez-Larraona, G. (Gorka); Elduayen-Echave, B. (Beñat); Hernández, B. (Borja); Romay-Gainza, A. (Asier); Arnau, R. (Rosario)This article presents a methodology for compartmental model (CM) creation for long-term simulation of water resource recovery facilities (WRRFs). CMs are often focused on reproducing with a lower computational cost than previously simulated scenarios. In contrast, the methodology presented here can represent variable hydraulic conditions, based on the interpolation of data gathered from a set of computational fluid dynamics simulations that reproduce representative hydraulic scenarios. This is achieved by modelling with bidirectional flows the exchange flows between fixed compartments, which are defined based on the geometry of the reactors. The resultant hydraulic surrogate model can be implemented in commercial water treatment software to solve biochemical kinetics. The methodology was applied to simulate in WEST (R)-DHI, a WRRF in Vila-Real, Spain. In this contribution, the CM was validated with real plant data. The developed CM provided a quick response simulation with a high level of hydraulic and biochemical detail. This allowed us to observe a spatial distribution of component concentration, which could help with sensor location or plant optimisation. The methodology presented here could also be a useful enabler of digital twins to be implemented in WRRF.
- Eclecticismo, apertura y reflexión. El diseño interior a través de las revistas de arquitectura españolas 1925-1936(Universidad de Cuenca, 2024) Villanueva-Fernández, M. (María); García-Diego, H. (Héctor)Con la llegada de la modernidad, el arquitecto adquiere un papel protagonista en la escena del interior y del mueble. Las nuevas propuestas procedentes de Europa diseñadas por arquitectos internacionales comienzan a introducirse en España a través de las publicaciones periódicas de arquitectura. Las revistas nacionales se hacen eco de estos contenidos y se convierten en el vehículo propicio para la difusión de las nuevas formas. Esta investigación, realizada a partir del estudio de los artículos publicados por once revistas de arquitectura españolas entre 1925 y 1936, persigue, por un lado, proporcionar una perspectiva global sobre la evolución del interés en el diseño interior en España entre 1925 y 1936 y, por otro lado, reflexionar acerca del papel del arquitecto en el desarrollo y difusión del interior y el equipamiento modernos.
- BN-BacArena: Bayesian network extension of BacArena for the dynamic simulation of microbial communities(2024-05) Blasco-Aramburu, T. (Telmo); Balzerani, F. (Francesco); Valcárcel-García, L.V. (Luis Vitores); Larrañaga, P. (Pedro); Rufián-Henares, J.Á. (Ángel José); Francino, M.P. (M. Pilar); Planes-Pedreño, F.J. (Francisco Javier); Bielza, C. (Concha); Pérez-Burillo, S. (Sergio)Motivation Simulating gut microbial dynamics is extremely challenging. Several computational tools, notably the widely used BacArena, enable modeling of dynamic changes in the microbial environment. These methods, however, do not comprehensively account for microbe-microbe stimulant or inhibitory effects or for nutrient-microbe inhibitory effects, typically observed in different compounds present in the daily diet.Results Here, we present BN-BacArena, an extension of BacArena consisting on the incorporation within the native computational framework of a Bayesian network model that accounts for microbe-microbe and nutrient-microbe interactions. Using in vitro experiments, 16S rRNA gene sequencing data and nutritional composition of 55 foods, the output Bayesian network showed 23 significant nutrient-bacteria interactions, suggesting the importance of compounds such as polyols, ascorbic acid, polyphenols and other phytochemicals, and 40 bacteria-bacteria significant relationships. With test data, BN-BacArena demonstrates a statistically significant improvement over BacArena to predict the time-dependent relative abundance of bacterial species involved in the gut microbiota upon different nutritional interventions. As a result, BN-BacArena opens new avenues for the dynamic modeling and simulation of the human gut microbiota metabolism.Availability and implementation MATLAB and R code are available in https://github.com/PlanesLab/BN-BacArena.
- SDR-Based monostatic chipless RFID reader with vector backgroud substration capabilities(IEEE, 2023) Del-Rio-Orduña, D. (David); Bhattacharyya, R. (RahuL); Villa-González, F. (Fátima); Rezola-Garciandia, A. (Ainhoa); Valderas Gazquez, D.(Daniel)This article presents a high-performance frequency-domain chipless RFID reader with vector background subtraction capabilities, implemented in a software-defined radio (SDR) for the first time. The proposed reader is low-cost, compact size, and versatile. It is implemented in a USRP N210 paired to a modified CBX-40 daughterboard, enabling magnitude and phase data acquisition in a monostatic (one antenna) set up. The reader can perform a vector background subtraction operation between two complex measurements (with and without a chipless tag) to suppress the self-interference (SI) that hinders the response of the tag and provide 40 dB of dynamic range. To demonstrate the performance of the reader, the spectral signatures of three frequency-coded (FC) tags with four resonant frequencies are captured over the 1.5-4-GHz band scanned with 10-MHz resolution in 251 ms, obtaining comparable measurements to those of an expensive laboratory vector network analyzer (VNA) from 20 to 40 cm. The detected resonant frequency offset between both devices is Delta f(r) <= 4.18% . It is also demonstrated that the proposed reader can track a resonant frequency shift and therefore be used in real-time sensing applications.
- Minimum Representative human body model size determination for link budget calculation in implanted medical devices.(MDPI, 2021) Chen, X. (Xiaodong); Ortego-Isasa, I. (Iñaki); Gao, Y. (Yue); Rezola-Garciandia, A. (Ainhoa); Valderas Gazquez, D.(Daniel)In this work, the optimum homogeneous phantom size for an equivalent whole-body electromagnetic (EM) modeling is calculated. This will enable the simple characterization of plane wave EM attenuation and far-field link budgets in Active Medical Implant (AMI) applications in the core region of the body for Industrial, Scientific, Medical and MedRadio frequency bands. A computational analysis is done to determine the optimum size in which a minimum phantom size reliably represents a whole-body situation for the corresponding frequency of operation, saving computer and laboratory resources. After the definition of a converge criterion, the computed minimum phantom size for subcutaneous applications, 0–10 mm insertion depth, is 355 × 160 × 255 mm3 for 402 MHz and 868 MHz and a cube with a side of 100 mm and 50 mm for 2.45 GHz and 5.8 GHz, respectively. For deep AMI applications, 10–50 mm insertion depth, the dimensions are 355 × 260 × 255 mm3 for 402 MHz and 868 MHz, and a cube with a side of 200 mm and 150 mm for 2.45 GHz and 5.8 GHz, respectively. A significant reduction in both computational and manufacturing resources for phantom development is thereby achieved. The verification of the model is performed by field measurements in phantoms made by aqueous solutions with sugar.