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Duplex treatments prepared by HiPIMS and sol-gel on biodegradable ZK60 magnesium alloy for biomedical applications
No full textThe utilization of magnesium-based biomaterials in biomedical applications has grown considerably in recent years due to their favourable biocompatibility, biodegradability, and mechanical properties that closely resemble those of bones. However, the use of Mg-based alloys in aggressive environments, such as human bodily fluids, is hindered by their susceptibility to rapid corrosion, which compromises their mechanical properties. This can lead to infections in the body due to uncontrolled corrosion. In this study, a novel approach was employed to enhance the corrosion resistance of biodegradable ZK60 magnesium alloy and achieve optimal surface properties that can potentially enhance its antibacterial performance, hardness, and toughness. This approach involved the application of duplex treatments consisting of TiN doped with Cu coatings deposited via high power impulse magnetron sputtering (HiPIMS) followed by a Sol-gel top layer. The study systematically investigated the surface properties (wettability, roughness, and morphology), hardness, toughness and adhesion of the coatings to the substrate. To assess the corrosion resistance, mass change and hydrogen evolution of the samples, they were immersed in Hanks Balanced Salts Solution. Electrochemical tests were conducted to estimate the corrosion behavior of the samples. The in-vitro corrosion tests results demonstrated that the duplex treatments enhanced the corrosion resistance of the uncoated magnesium alloy samples. The duplex treatments exhibited suitable properties, including high corrosion resistance, hardness, toughness and adequate values of wettability and porosity-roughness. Therefore, they can be considered a promising option for use in biodegradable magnesium implants.This work was supported by the Gobierno de Navarra-Departamento de Desarrollo Económico through grant 0011-1410-2020-000006 'CAM-MBI - Additive Manufacturing of Magnesiumbased Biodegradable Implants with Controlled Corrosion Rate and Infection'
Integrated biowaste management by composting at a university campus: process monitoring and quality assessment
No full textThe sustainable management of biowaste, mainly food and pruning waste, is currently a challenge due to the increase in its production. The CaMPuSTAJE program, which has been implemented on the campus of the Public University of Navarre (UPNA) since 2019, is an excellent example of how the institution is addressing its strategic interests in sustainable waste management. The principal aim of this program is to manage the biowastes generated by the campus canteens through a simple community composting facility, involving UPNA students and graduates. This program aims to promote experiential learning and applied research in sustainability and circular economy, managing their own waste in a circular and local way. Thus, four composting sets of the CaMPuSTAJE program were evaluated by monitoring the process and the main chemical properties of the composting samples. Also, final composts were fully characterized to ensure the process reproducibility and efficiency and the absence of any hazard in the end-products. The final composts showed a significant agronomic quality, had low content of potentially toxic elements, and were free from phytotoxicity, thus being able to be reintroduced as an organic amendment at the university campus itself.This research was funded by the research project NEOCOMP (ref. PID2020-113228RB-I00) funded by MCIN/AEI/10.13039/501100011033, and it was supported by the Spanish Ministry of Universities with a PhD contract (FPU21/01207) to the first author
"It didn't work and it's a loss for everyone": analysis of the factors that affect the breakdowns of foster care processes in the Autonomous Community of Navarre
No full textLa presente investigación tiene por objetivo analizar los factores que inciden en las rupturas de los procesos de acogimiento familiar. Se ha desarrollado un análisis documental exhaustivo y se ha empleado una metodología cualitativa basada en entrevistas semiestructuradas a familias acogedoras ajenas en las que se haya producido una interrupción no prevista del proceso de acogida. La investigación evidencia cómo la configuración actual del sistema de atención al acogimiento familiar favorece que existan obstáculos para que no se desarrolle e implemente la medida de forma adecuada. Los resultados reflejan la presencia de una serie de factores de ruptura relacionados con: 1) el/la menor en acogida, su edad y las experiencias previas vividas; 2) la familia acogedora, la existencia de hijas/os previos y su formación; y 3) la intervención profesional, la intensidad del seguimiento, el apoyo ofrecido y la supervisión realizada. A partir del estudio, se realiza una propuesta de mejora estructural en el procedimiento de acogimiento familiar en función de las diferentes fases del proceso para prevenir y/o atenuar las posibles interrupciones del mismo.The aim of this research is to analyze the factors that influence the interruption of the foster care process. An exhaustive documentary analysis has been carried out and a qualitative methodology has been used based on semi-structured interviews with foster families in which there has been an unplanned interruption of the foster care process. The research shows how the current configuration of the foster care system favors the existence of obstacles to the inadequate development and implementation of the measure. The results reflect the presence of a series of breakdown factors related to: 1) the foster child, his/her age and previous experiences; 2) the foster family, the existence of previous children and their education; and 3) the professional intervention, the intensity of the follow-up, the support offered and the supervision carried out. Based on the study, a proposal for structural improvement in the foster care procedure is made according to the different phases of the process in order to prevent and/or mitigate possible interruptions in the process
Design of a washroom product oriented to people with disabilities
No full textThis project is focused on the design of a shower platform specifically to address the challenges faced by people with physical disabilities. The product is expected to enable users to perform daily tasks independently, safely and comfortably. Several alternatives have been studied taking into account the main needs of people with disabilities. The selected product has been designed by using SolidWorks. It consists of a motorised linear system using a rack and pinion mechanism that gives movement to an adapted and comfortable seat, IoT has also been integrated to facilitate the protocol in case of emergency. In addition, some key components have been studied by simulating a real scene to verify their correct design and functioning. Furthermore, the rack and pinion system has been analysed to bending stress and deterioration failure and an interactive website has been done in order to make those analysis more efficiently. A detailed budget has been made to approximate the price of the product, making it accessible to a wider range of consumers.Graduado o Graduada en Ingeniería en Tecnologías Industriales por la Universidad Pública de Navarra (Programa Internacional)Industria Teknologietako Ingeniaritzan Graduatua Nafarroako Unibertsitate Publikoan (Nazioarteko Programa
Detección de fraude a través de la integridad del dispositivo
No full textEl presente trabajo describe el proceso de investigar las posibles soluciones actuales a la hora de detectar y prevenir fraude realizado mediante ataques de inyección en procesos de onboarding con tecnología biométrica de reconocimiento facial. El origen de esta investigación viene por un caso de uso de la empresa de reconocimiento facial Veridas. El auge de la Inteligencia Artificial ha desembocado en un aumento de los ataques de inyección a clientes sensibles. Aunque Veridas dispone de medidas de detección de imágenes y vídeos generados por Inteligencia Artificial, en algunos casos se dan falsos negativos. Estos falsos negativos pueden reducirse drásticamente si se comprueba que el dispositivo que efectúa el proceso de onboarding es un dispositivo íntegro.Graduado o Graduada en Ingeniería Informática por la Universidad Pública de NavarraInformatika Ingeniaritzako Graduatua Nafarroako Unibertsitate Publikoa
Effects of an individualised exercise program in hospitalised older adults with cancer: a randomised clinical trial
No full textWe aimed to examine the effects of an individualised multicomponent exercise program on functional outcomes in hospitalised older patients with cancer. Patients aged ¿ 65 were recruited upon admission to a Medical Oncology Department and randomly allocated to receive a multicomponent exercise training program twice daily for five days or standard hospital care. The primary outcome measure was the change in functional status using the Short Physical Performance Battery. This study allocated 30 patients in the Control group and 28 in the intervention group. The mean age was 74.4 years. The intervention group (n = 14) showed significant improvements vs the Control group (n = 20) in the Short Physical Performance Battery (SPPB) (between-group difference, 1.92; 95% CI = 0.80,3.07), knee extension strength (between-group difference 7.72; 95% CI = 1.83,13.8), as well as a significant reduction in fatigue (between-group difference —26.5; 95% CI = —38.6,—13.9). This individualised exercise program appears to have contributed to improving functional abilities and reducing fatigue in hospitalised older cancer patients.Open Access funding provided by Universidad Pública de Navarra. This research was funded by the Instituto de Salud Carlos III-FEDER through project grant (PI21/01117
Colonial memories, slavery monuments and the anti-racist movement. Idrissa Diallo Square as dissonant heritage in Barcelona
No full textEste trabajo examina los conflictos en torno a la Plaça d’Idrissa Diallo en Barcelona, destacada por la retirada del monumento al esclavista Antonio López en 2018. A partir de datos etnográficos, se analizan los discursos oficiales, provenientes de instituciones públicas, museos y políticas de memoria, así como también las contranarrativas de colectivos antirracistas, migrantes y racializados, que desafían la visión hegemónica del patrimonio. El cambio de nombre de la plaza en 2022 y los debates públicos reflejan un intento de crítica a la historia esclavista, aunque persisten narrativas eurocéntricas que perpetúan imaginarios coloniales. Los movimientos antirracistas exponen la historia colonial que las políticas de memoria olvidan explicar, visibilizando además sus legados en el presente. Las disonancias de un patrimonio incómodo exponen las limitaciones de las políticas institucionales de memoria, y desafían a las instituciones al cambio estructural. Se concluye que la descolonización del espacio público requiere transformar prácticas simbólicas y materiales y redistribuir el poder en la construcción de memorias colectivasLan honek Bartzelonako Plaça d’Idrissa Dialloren bueltako gatazkak aztertzen ditu. Hain justu, plaza hori 2018an Antonio López esklabistaren monumentua kendu zutelako da ezaguna. Datu etnografikoetatik abiatuta, diskurtso ofizialak aztertzen dira, erakunde publikoetatik, museoetatik eta memoria-politiketatik etorriak, bai eta antirrazisten, migratzaileen eta arrazializatuen taldeen kontranarratibak ere, zeinak desafio egiten baitiote ondareari buruzko ikuspegi hegemonikoari. 2022an plazaren izena aldatu izanak eta izan diren eztabaida publikoek historia esklabistari kritika egiteko saiakera islatzen dute, nahiz eta badiren iruditeria kolonialak betikotzen dituzten narratiba eurozentrikoak ere. Memoria-politikek azaltzen ez duten historia koloniala azaltzen dute mugimendu antirrazistek, eta haren ondareak ikusarazten dituzte orainaldian. Ondare deseroso baten inguruko disonantziek memoriari buruzko politika instituzionalen mugak erakusten dituzte, eta instituzioak desafiatzen dituzte egiturazko aldaketa baten alde. Ondoriozta tzen da espazio publikoaren deskolonizazioak praktika sinboliko eta materialak eraldatzea eskatzen duela, bai eta memoria kolektiboen eraikuntzan boterea birbanatzea ere.This paper examines the conflicts surrounding Idrissa Diallo Square in Barcelona, highlighted by the removal of the monument to the slave trader Antonio López in 2018. Based on ethnographic data, it analyses the official discourses coming from public institutions, museums and memory policies, as well as the counter-narratives of anti-racist, migrant and racialised groups that challenge the hegemonic vision of heritage. The renaming of the square in 2022 and the public debates reflect an attempt to criticise the history of slavery, although Eurocentric narratives that perpetuate colonial imaginaries persist. Anti-racist movements expose the colonial history that memory policies forget to explain, also making their legacies visible in the present. The dissonances of an uncomfortable heritage expose the limitations of institutional memory policies, and challenge institutions to structural change. It is concluded that the decolonisation of public space requires transforming symbolic and material practices and redistributing power in the construction of collective memories
El legado del Côa: arte rupestre al aire libre en el valle del Duero
No full textEl arte rupestre al aire libre del Valle del Côa constituye uno de los núcleos de
época paleolítica más importantes a nivel mundial. En este trabajo se propone un
análisis multidisciplinar, tomando como punto de partida la polémica que rodea
su caso. Así, se tiene en cuenta la cuestión patrimonial, la salvaguarda o la
dimensión paisajística del entorno en conexión con los grabados. Además, se
introduce una comparativa con el proceso de valorización de la estación de arte
rupestre Siega Verde.The outdoor rock art of the Côa Valley is one of the most important Palaeolithic
sites in the world. This paper proposes a multidisciplinary analysis, taking as its
starting point the controversy surrounding the site. It considers the issues of
heritage, preservation and the landscape in relation to the engravings. It also
includes a comparison with the process of enhancing the Siega Verde rock art site.Graduado o Graduada en Historia y Patrimonio por la Universidad Pública de NavarraHistoria eta Ondarean Graduatua Nafarroako Unibertsitate Publikoa
Cadáver exquisito
No full textReflexiones del autor a propósito de la novela "Solaris", de Stanislaw Lem
Clasificación de perdices por su sexo a través de parámetros morfométricos
No full textEste trabajo tiene como objetivo desarrollar un sistema de clasificación del sexo
en perdices rojas ( Alectoris rufa) a partir de variables morfométricas externas,
utilizando datos recogidos durante la actividad cinegética entre 1991 y 2010. Se
aplicaron cinco enfoques de clasificación supervisada: regresión logística,
máquinas de vectores soporte (SVM), árboles de decisión, bosques aleatorios
(Random Forest) y redes neuronales artificiales (ANN). La metodología incluyó
la segmentación estratificada del conjunto de datos, la selección de variables, la
sintonización de hiperparámetros y la validación cruzada de los modelos. Los
mejores clasificadores alcanzaron una precisión superior al 95 % y valores de
AUC próximos a 0.99. Los resultados confirman la existencia de dimorfismo
sexual detectable a partir de medidas externas y justifican el uso de estos
métodos como herramienta auxiliar en estudios de ecología de poblaciones. Los
clasificadores SVM mostraron el rendimiento más consistente y preciso en las
distintas métricas de evaluación. El análisis fue realizado íntegramente en
RStudio mediante R Markdown.Máster Universitario en Modelización e Investigación Matemática, Estadística y ComputaciónUnibertsitate Masterra Modelizazio eta Ikerketa Matematikoan, Estatistikan eta Konputazioa