Sistema de reconocimiento facial basado en redes neuronales convencionales sobre el dispositivo Raspberry Pi

Training and implementation of Convolutional Neural Networks (CNN) using Python programming language and TensorFlow on a Raspberry Pi device for facial verification. During this project, different types of CNN structures will be tested in order to study the results obtained for each of them as well as their operation on the Raspberry Pi 3B device.Entrenamiento e implementación de Redes Neuronales Convolucionales (CNN) utilizando el lenguaje Python y TensorFlow sobre un dispositivo Raspberry Pi para verificación facial. Durante este proyecto se probaran distintos tipos de estructuras de CNN con el objetivo de estudiar los resultados obtenidos para cada una de dichas estructuras así como su funcionamiento sobre el dispositivo Raspberry Pi 3B.Universidad de Sevilla. Máster en Ingeniería Electrónica, Robótica y Automátic

Human Strength and the Burnout Syndrome in a sample of Secondary School Teachers

Este estudio se enmarca en el contexto del malestar docente y síndrome de burnout. En este trabajo hemos planteado un nuevo enfoque dentro del campo emergente de la Psicología Positiva, y más concretamente el de “Las fortalezas y virtudes humanas”. Según Seligman (2003), las fortalezas y las virtudes actúan a modo de barrera contra la desgracia y los trastornos psicológicos y pueden ser la clave para la capacidad de recuperación. Por ello, nos hemos planteado como objetivo general conocer las relaciones entre burnout y las fortalezas y virtudes de la psicología positiva. Para ello hemos utilizado el cuestionario VIA. Fortalezas y Virtudes de Valores en Acción (Adaptación de Seligman, 2003) y el Inventario de Burnout de Maslach (MBI). Y como objetivo especifico analizar el burnout y las fortalezas y virtudes en función del género y de los años de docencia en una muestra de 46 profesores no universitarios.This study is framed within the context of the teaching unrest and the Burnout Syndrome. In this paper we have proposed a new approach within the emerging field of Positive Psychology, and more specifically that of “human strengths and virtues.” According to Seligman (2003), strengths and virtues act as a barrier against misery and psychological disorders and may be the key to resilience. We have, therefore, proposed as our general objective to get to know the relation between the Burnout Syndrome and the strengths and virtues of Positive Psychology. In order to carry this out, we have used the questionaire VIA. Fortalezas y Virtudes de Valores en Acción (Adaptación de Seligman, 2003) y el Inventario de Burnout de Maslach (MBI). Our main objective, is sistethus to analyse the Burnout Syndrome and the strengths and virtues in terms of gender and teaching in a sample of 46 non-university teachers.peerReviewe

Restauración de la visión en la DMAE: diseño del Telescopio Oftálmico de Galileo.

Hoy en día, el tratamiento de la DMAE está basado en tratamientos farmacológicos intravítreos para evitar su progresión. En este estudio se ha diseñado la primera solución óptica a esta patología, restaurando la visión de los pacientes que la sufren. Para ello, se ha creado un telescopio de Galileo por medio de lentes acromáticas de diferentes focales y se ha introducido en el ojo teórico de Liou Brennan mediante el software de diseño óptico Zemax. Una vez estaban los telescopios diseñados, se han descentrado las lentes para generar un efecto prismático y así llevar la imagen a una zona sana de la retina. Se ha calculado cual es el desplazamiento necesario para vencer escotomas de diferentes magnitudes, y se ha realizado una equivalencia entre el desplazamiento retiniano en mm y los grados del campo visual. De esta manera, se puede saber cual es el desplazamiento necesario para vencer un escotoma con solo conocer su tamaño.Por último, se ha examinado cual sería la calidad óptica y visual del paciente, para poder saber cual es la configuración del telescopio que mejor imagen le va a proporcionar. Para ello, se han evaluado diferentes magnitudes como la PSF, MTF y RMS y se ha realizado una simulación de imagen. Se ha podido observar que la calidad óptica que se obtendría va a depender de la focal de las lentes empleadas, ya que cuanto mayor es la focal, mayor es el desplazamiento necesario para vencer el escotoma y la calidad óptica va a disminuir. <br /

Cu2+–Assisted Synthesis of Ultrasharp and Sub-10 nm Gold Nanostars. Applications in Catalysis, Sensing, and Photothermia

Gold nanostars have shown enormous potential as the main enablers of advanced applications ranging from biomedicine to sensing or catalysis. Their unique anisotropic structure featuring sharp spikes that grow from a central core offers enhanced optical capabilities and spectral tunability. Although several synthesis methods yield NSs of different morphologies and sizes up to several hundred nanometers, obtaining small NSs, while maintaining their plasmonic properties in the near-infrared, has proven challenging and elusive. Here, we show that Cu2+ addition during NS synthesis in polyvinylpyrrolidone/dimethylformamide generates more crystallographic defects and promotes the directional growth, giving rise to NSs with a larger number of much sharper spikes. They are also formed at smaller volumes, enabling the generation of ultrasmall nanostars, with a volume as small as 421 nm3 (i.e., 9.2 nm of volume-equivalent diameter), while maintaining a plasmon resonance in the near-infrared. To this end, we systematically evaluate the influence of synthesis parameters on the nanostar size and optical characteristics and demonstrate their properties for applications in catalysis, surface-enhanced Raman spectroscopy sensing, and hyperthermia. The ultrasmall nanostars show excellent attributes in all of them, leveraging their small size to enhance properties related to a higher surface-to-volume ratio or colloidal diffusivity.The authors thank the Spanish State Research Agency (AEI) for funding through the project PID2022-139467OB-I00/AEI/10.13039/501100011033, and CNS2023-144447/MICIU/AEI/10.13039/501100011033/NextGenerationEU/PRTR. The authors also thank the technical support of SGIker

Estimación de capacidad en una red IE 802.11e para entornos outdoor multicelda

The convergence of services as video, voice and data over a common infrastructure achieving a certain Quality of Service (QoS) level lead to the creation of the IEEE 802.11e standard which enhances the original IEEE 802.11 MAC layer by providing a fair medium access treatment according to the application needs. In addition, the deployment of WLANs in public places (hotspots) has been made in a one-cell oriented way and the behavior of parameters such as throughput, delay and loss packet in voice and data traffic over an outdoor environment involving more than one cell has not been analized. These facts lead to the design of a 802.11e multicell outdoor network based on the solutions provided by special techniques commonly used by cellular telephony in order to solve some problems related to outdoor scenarios. Such design is evaluated using the Network Simulator NCTUns 3.0 and finally some conclusions related to the impact of a multiple cell scheme on the capacity of the Access Points (APs) are presented.La convergencia de servicios como video, voz y datos sobre una infraestructura común con cierta calidad deservicio (QoS) llevaron al desarrollo del estándar 802.11e., que mejora el estándar original. En este trabajo se analiza el desarrollo de un sistema802.11e multicelda, por medio de simulaciones, utilizando la herramienta NCTUNS versión 3.0 y el impacto en la capacidad del sistema en un entorno multicelda

Development, Characterization, and In Vitro Evaluation of Resveratrol-Loaded Poly-(ε-caprolactone) Microcapsules Prepared by Ultrasonic Atomization for Intra-Articular Administration

Intra-articular administration of drugs to the joint in the treatment of joint disease has the potential to minimize the systemic bioavailability and the usual side-effects associated with oral drug administration. In this work, a drug delivery system is proposed to achieve an anti-inflammatory local effect using resveratrol (RSV). This study aims to develop microcapsules made of poly-(ε-caprolactone) (PCL) by ultrasonic atomization to preserve the antioxidant activity of RSV, to prevent its degradation and to suppress the inflammatory response in activated RAW 264.7 macrophages. An experimental design was performed to build a mathematical model that could estimate the effect of nozzle power and polymer concentration on particle size and encapsulation efficiency. RSV-loaded microcapsules showed adequate morphology, particle size, and loading efficiency properties. RSV formulations exhibited negligible cytotoxicity and an efficient amelioration of inflammatory responses, in terms of Nitric Oxide (NO), ROS (Reactive Oxygen Species), and lipid peroxidation in macrophages. Thus, RSV-loaded microcapsules merit consideration as a drug delivery system suitable for intra-articular administration in inflammatory disorders affecting the jointAcknowledgments: I.L.-G. is grateful to “Programa de axudas á etapa predoutoral da Xunta de Galicia (cofinanciadas por FSE Galicia 2014-2020), Consellería de Cultura, Educación e Ordenación Universitaria” program for doctoral fellowshipS

Human Strength and the Burnout Syndrome in a sample of Secondary School Teachers

Este estudio se enmarca en el contexto del malestar docente y síndrome de burnout. En este trabajo hemos planteado un nuevo enfoque dentro del campo emergente de la Psicología Positiva, y más concretamente el de “Las fortalezas y virtudes humanas”. Según Seligman (2003), las fortalezas y las virtudes actúan a modo de barrera contra la desgracia y los trastornos psicológicos y pueden ser la clave para la capacidad de recuperación. Por ello, nos hemos planteado como objetivo general conocer las relaciones entre burnout y las fortalezas y virtudes de la psicología positiva. Para ello hemos utilizado el cuestionario VIA. Fortalezas y Virtudes de Valores en Acción (Adaptación de Seligman, 2003) y el Inventario de Burnout de Maslach (MBI). Y como objetivo especifico analizar el burnout y las fortalezas y virtudes en función del género y de los años de docencia en una muestra de 46 profesores no universitarios.This study is framed within the context of the teaching unrest and the Burnout Syndrome. In this paper we have proposed a new approach within the emerging field of Positive Psychology, and more specifically that of “human strengths and virtues.” According to Seligman (2003), strengths and virtues act as a barrier against misery and psychological disorders and may be the key to resilience. We have, therefore, proposed as our general objective to get to know the relation between the Burnout Syndrome and the strengths and virtues of Positive Psychology. In order to carry this out, we have used the questionaire VIA. Fortalezas y Virtudes de Valores en Acción (Adaptación de Seligman, 2003) y el Inventario de Burnout de Maslach (MBI). Our main objective, is sistethus to analyse the Burnout Syndrome and the strengths and virtues in terms of gender and teaching in a sample of 46 non-university teachers.peerReviewe

Multicomponent magnetic nanoparticle engineering: the role of structure-property relationship in advanced applications

Combining magnetic nanomaterials with materials of other classes can produce multicomponent nanoparticles with an entire ensemble of new structures and unique, enhanced, synergetic, and/or complementary functionalities. Here we discuss the most recent developments in the synthesis of multicomponent magnetic nanoparticles, describe the resulting structures and their novel properties, and explore their application in a variety of fields, including multimodal imaging, nanomedicine, sensing, surface-enhanced Raman scattering, and heterogeneous catalysis. The current synthetic methods (usu-ally bottom-up approaches) of multicomponent nanoparticles can produce a number of tailored mor-phologies (core@shell, yolk-shell, core-satellite, Janus, nanochains, anisotropic, etc.), making them invaluable for applications in biology, medicine, chemistry, physics, and engineering. But like any new technology, their synthesis methods need to be optimized to be simple, scalable, and as environmentally friendly as possible before they can be widely adopted. In particular, the use of life cycle assessment (LCA) to guide future works toward environmental sustainability is highlighted. Overall, this review not only presents a critical and timely summary of the state-of-the-art of this burgeoning field in both fundamental and applied nanotechnology, but also addresses the challenges associated with under-standing the particular structure-property relationships of multicomponent magnetic nanoparticles.The authors thank funding from the Spanish State Research Agency (AEI) through the project PID2019-106099RB-C43/AEI/10.13039/501100011033 and from the Basque Government Industry and Education Department under the ELKARTEK, HAZITEK and PIBA (PIBA-2018-06) programs, respectively

Bibliotecas digitales de Internet como servicio complementario para pequeñas bibliotecas

The objective of this work was to propose digital library services for libraries located in smaller municipalities that have lack of funds and are located in disadvantaged geographical areas. In these places additional aid in the process of access to information, leading to better access to culture is needed. And we believe that digital libraries can contribute to these objectives