Implementación de un gestor de bases de datos orientado a objetos

El objetivo principal de este trabajo es la presentación de una librería que permita al programador de una aplicación abstraerse del mecanismo de almacenamiento de objetos en una base de datos. Hay librerías similares que han dejado de existir por diferentes razones y librerías existentes que a nuestro parecer son más complejas de utilizar en un entorno educativo, que es la finalidad para la que se ha propuesto nuestro proyecto. Nuestro proyecto consiste, por tanto, en el desarrollo de una librería en Java para manejar objetos en la base de datos, los cuales se podrán insertar, actualizar, borrar y consultar sin necesidad de conocer el lenguaje SQL ni sus detalles de almacenamiento en la base de datos. Para ello tan solo es necesario incluir nuestra librería como dependencia en un proyecto Java, y disponer de un SGBD relacional. El resultado del proyecto ha cumplido todas nuestras expectativas. La librería soporta relaciones entre objetos con con distintos tipos de multiplicidad, que formaban parte del objetivo inicial del proyecto

Sedentary Time Accumulated in Bouts is Positively Associated with Disease Severity in Fibromyalgia: The Al-andalus Project

To examine the associations of prolonged sedentary time (ST) with disease severity in women with fibromyalgia, and to analyse the combined association of total ST and prolonged ST with the disease severity in this population. Women (n = 451; 51.3 +/- 7.6 years old) with fibromyalgia participated. Sedentary time and moderate-to-vigorous physical activity (MVPA) were measured using triaxial accelerometry and ST was processed into 30- and 60-min bouts. Dimensions of fibromyalgia (function, overall, symptoms) and the overall disease impact were assessed with the Revised Fibromyalgia Impact Questionnaire (FIQR). Body fat percentage was assessed using a bio-impedance analyser, and physical fitness was assessed with the Senior Fitness Tests Battery. Greater percentage of ST in 30-min bouts and 60-min bouts were associated with worse function, overall, symptoms and the overall impact of the disease (all, P 60-min bouts) presented lower overall impact compared to participants with high levels of total ST and prolonged ST (mean difference = 6.56; 95% confidence interval (CI) = 1.83 to 11.29, P = 0.002). Greater percentage of ST accumulated in 30- and 60-min bouts and a combination of high levels of total and prolonged ST are related to worse disease severity. Although unable to conclude on causality, results suggest it might be advisable to motivate women with fibromyalgia to break prolonged ST and reduce their total daily ST

Development of carbon fiber acrylonitrile styrene acrylate composite for large format additive manufacturing

The increasing interest of Large Format Additive Manufacturing (LFAM) technologies in various industrial sectors mainly lies on the attainable production of pieces reaching several cubic meters. These new technologies require the development of optimized materials with two-folded capabilities, able to satisfy functional in-service requirements but also showing a proper printability. Acrylonitrile Styrene Acrylate (ASA) is among the most interesting thermoplastic materials to be implemented in a LFAM device due to its excellent wettability and mechanical properties. This research focuses on the development and characterization of ASA and carbon fiber (CF) ASA composites suitable for LFAM. The rheological, thermal and mechanical properties of neat ASA and ASA containing 20 wt% CF are addressed. The results evidence the higher performance of the CF loaded composite compared to the raw ASA polymer (i.e., the 20 wt% CF composite shows a 350% increase in flexural Young's Modulus and a 500% increment in thermal conductivity compared with neat ASA). Additionally, both materials were successfully printed along perpendicular directions (X and Z), showing the maximum tensile strain for the composite printed along the X orientation as was expected. The results of the flexural tests are comparable or slightly higher than those of injected parts. Finally, the fracture surface was analysed, identifying different types of porosity

Patterns of Sedentary Time and Quality of Life in Women With Fibromyalgia: Cross-Sectional Study From the al-Ándalus Project

Background: Sedentary time (ST) has been associated with detrimental health outcomes in fibromyalgia. Previous evidence in the general population has shown that not only is the total amount of ST harmful but the pattern of accumulation of sedentary behaviors is also relevant to health, with prolonged unbroken periods (ie, bouts) being particularly harmful. Objective: To examine the association of the patterns of ST with health-related quality of life (HRQoL) in women with fibromyalgia and to test whether these associations are independent of moderate-to-vigorous physical activity (MVPA). Methods: A total of 407 women (mean 51.4 years of age [SD 7.6]) with fibromyalgia participated. ST and MVPA were measured with triaxial accelerometry. The percentage of ST accumulated in bouts and the frequency of sedentary bouts of different lengths (>= 10 min, >= 20 min, >= 30 min, and >= 60 min) were obtained. Four groups combining total ST and sedentary bout duration (>= 30 min) were created. We assessed HRQoL using the 36-item Short-Form Health Survey (SF-36). Results: A greater percentage of ST spent in all bout lengths was associated with worsened physical function, bodily pain, vitality, social function, and physical component summary (PCS) (all P= 30 min and >= 60 min), physical role (>= 60 min), bodily pain (>= 60 min), and vitality (>= 20 min, >= 30 min, and >= 60 min) (all P<.05). Overall, for different domains of HRQoL, these associations were independent of MVPA for higher bout lengths. Patients with high total ST and high sedentary bout duration had significantly worsened physical function (mean difference 8.73 units, 95% CI 2.31-15.15; independent of MVPA), social function (mean difference 10.51 units, 95% CI 2.59-18.44; not independent of MVPA), and PCS (mean difference 2.71 units, 95% CI 0.36-5.06; not independent of MVPA) than those with low ST and low sedentary bout duration. Conclusions: Greater ST in prolonged periods of any length and a higher frequency of ST bouts, especially in longer bout durations, are associated with worsened HRQoL in women with fibromyalgia. These associations were generally independent of MVPA

Treatment of Social Media in Person Name Disambiguation in the Web

En este trabajo presentamos dos heurísticas para tratar páginas web correspondientes a redes sociales en el problema de desambiguación de nombres de persona en la Web. Este problema consiste en agrupar las páginas web proporcionadas por un motor de búsqueda al consultar un nombre de persona según el individuo al que se refieren. Aunque estas páginas web pueden afectar negativamente en la agrupación de los resultados, la mayoría de sistemas del estado del arte no tienen en cuenta su papel en este problema. Hemos evaluado nuestras heurísticas con dos colecciones que contienen este tipo de páginas web. Para agrupar las páginas web hemos utilizado una extensión de un algoritmo del estado del arte. Ambas heurísticas obtienen mejoras cuando hay un número elevado de páginas sociales y el algoritmo propuesto es más independiente del nivel de ambigüedad de los nombres de persona que otros propuestos por el estado del arte.In this work, we present two heuristics to treat web pages from social networks for person name disambiguation in the Web. This problem consists in clustering the results provided by a search engine when the query is a person name according to the individual they refer to. Although these web pages could negatively affect when grouping the results, most of the systems in the state-of-the-art do not take into account their role in this problem. We have evaluated our heuristics with two collections that contain this kind of web pages. We have used an extension of an algorithm of the state of the art to cluster the web pages. Both heuristics get improvements when there is a high number of social web pages, and the proposed algorithm is more independent with respect to the ambiguity degree of person names than other ones in the state of the art.Este trabajo ha sido subvencionado por el Ministerio de Ciencia e Innovación [MED-RECORD Project, TIN2013-46616-C2-2-R] y el grupo CVIP de la URJC

Anomaly detection in electromechanical systems by means of deep-autoencoder

© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other worksAnomaly detection in manufacturing processes is one of the main concerns in the new era of the Industry 4.0 framework. The detection of uncharacterized events represents a major challenge within the operation monitoring of electrical rotatory machinery. In this regard, although several machine learning techniques have been classically considered, the recent appearance of deep-learning approaches represents an opportunity in the field to increase the anomaly detection capabilities in front of complex electromechanical systems. However, each anomaly detection technique considers its own data interpretability and modelling strategy, which should be analyzed in front of the specificities of the data generated in an industrial environment and, specifically, by an electromechanical actuator. Thus, in this study, a comparison framework is considered including multiple fault scenarios in order to analyze the performance of four representative anomaly detection techniques, that is, one-class support vector machine, k-nearest neighbor, Gaussian mixture model and, finally, deep-autoencoder. The experimental results suggest that the use of the deep-autoencoder in the task of detecting anomalies of operation in electromechanical systems has a higher performance compared to the state of the art methods.Peer ReviewedPostprint (published version

Desregulación urbanística del suelo rústico en España. Cantabria y Extremadura como casos de estudio

La proliferación de viviendas en el suelo rústico ha tenido un fuerte impacto sobre el territorio, especialmente agudo durante las últimas dos décadas. Mediante el estudio de casos en dos regiones españolas (Cantabria y Extremadura) revelamos las diferentes particularidades que muestra este fenómeno, contrastando las dispares maneras de afrontarlo. Las tendencias compartidas hacia la desregulación de esta clase de suelo quedan evidenciadas en el estudio realizado sobre las modificaciones legislativas de corte "flexibilizador" y los procesos de legalización en ambas Comunidades Autónomas. Por último, aportamos ideas encaminadas a resolver el problema, entre las que destacan la redistribución de las competencias en materia de urbanismo. La prolongada inacción de los gobiernos para mantener la disciplina urbanística ha posibilitado las agresiones al territorio del que deberían ser custodios, por lo que es acuciante la confrontación del hecho y sus consecuencias para evitar que aumente su magnitud y complejidad.The proliferation of housings on the rural land has had a strong impact on the territory, particularly strong over the past two decades. By studying cases in two Spanish regions (Cantabria and Extremadura) we reveal the different characteristics that this phenomenon shows, contrasting the disparate ways of facing it. The shared trends towards the deregulation of this type of land are evidenced in our study of the "flexibilizing" legislative changes and the processes of legalization in both Autonomous Communities. Finally, we contribute ideas aimed at solving the problem, among which the redistribution of planning responsibilities. The prolonged inaction of governments to keep planning discipline has enabled attacks to territory which they should be stewards, so it is urgent the confrontation of the fact and its consequences to avoid increasing its magnitude and complexity

Analítica del aprendizaje sustentada en el Phet Simulations como medio de enseñanza en la asignatura de Física.

The challenge facing the teaching-learning process of Physics at the high school level lies mainly in the lack of motivation on the part of students, who tend to lose interest in classes that focus on theory and the resolution of exercises without understanding their application in real situations. The objective of this work is to analyze through learning analytics fostered with Phet Simulations for the continuous improvement of the teaching-learning process of Physics, in the contents of electrostatics. The methodology used was quantitative, with an observational-analytical type of study where theoretical methods such as synthetic analytical and inductive-deductive were used, and in the practical ones, mathematical statistics, both descriptive and inferential, as well as graphs. The results revealed an improvement in the academic performance of the experimental group when using the PhET simulator compared to the control group that followed traditional classes. It is concluded that the incorporation of interactive didactic resources, such as simulators, promotes significant learning in the teaching-learning process of students in the subject of Physics.El desafío que enfrenta el proceso de enseñanza-aprendizaje de la Física en el nivel de bachillerato radica principalmente en la falta de motivación por parte de los estudiantes, quienes tienden a perder interés en clases que se centran en la teoría y la resolución de ejercicios sin comprender su aplicación en situaciones reales. El objetivo de este trabajo es analizar a través de la analítica del aprendizaje fomentada con el Phet Simulations para la mejora continua del proceso enseñanza-aprendizaje de la Física, en los contenidos de electrostática. La metodología utilizada fue cuantitativa, con un tipo de estudio observacional-analítico donde se emplearon métodos teóricos como el analítico sintético e inductivo-deductivo y en los prácticos los estadísticos matemáticos, tanto el descriptivo como inferencial, así como los gráficos. Los resultados revelaron en las calificaciones asociadas a tres actividades, de la temática estudiada, una mejora en el rendimiento académico del grupo experimental al utilizar el simulador PhET en comparación con el grupo de control que siguió clases tradicionales. Se concluye que la incorporación de recursos didácticos interactivos, como los simuladores, propician un aprendizaje significativo en el proceso de enseñanza-aprendizaje de los estudiantes en la asignatura de Física

Evaluación preclínica del Obtudent-FC. Ensayo de irritación pulpar en perros

Entre los biomateriales más utilizados en la práctica estomatológica se encuentran las resinas dentales, muchas de las cuales se confeccionan a base de sistemas poliméricos, que se colocan en contacto con el tejido inmediatamente después de mezclados, por lo cual existe la peculiaridad de que, uno o más componentes del mismo migren al tejido en cuestión, y provoque respuestas locales irritantes o tóxicas de índole sistémica. Ocupan un lugar preferente en este tipo de materiales los dimetilmetacrilatos aromáticos tipo Bis-GMA. Este es el caso del OBTUDENT-FC, producido por el Centro de Biomateriales de la Universidad de La Habana, resina fotopolimerizable para restauraciones dentales. La mayoría de los materiales dentales compuestos de sistemas poliméricos han demostrado efectos tóxicos cuando se ensayan en animales de experimentación, así como mediante otros estudios toxicológicos, por lo cual se realiza el presente estudio preclínico en perros Beagle adultos y sanos, a los cuales se les practicaron obturaciones con el material de referencia, así como con un material comercial conocido, y controles positivos y negativos, siendo evaluados los efectos tóxicos de los mismos en tres períodos de tiempo. El grado de toxicidad pulpar del OBTUDENT-FC se evalúa de muy ligero , coincidiendo con el de la resina comercial DEGUFILL, siendo sólo ligeramente superior a la del CONTROL NEGATIVO.Palabras Clave: Resinas dentales Bis-GMA, Obtudent-FC, Evaluación preclínica, Irritación pulpar, Hallazgos histomorfológicos, Toxicidad . </p