Implementation of Open Boundary Problems in Photo-Conductive Antennas by Using Convolutional Perfectly Matched Layers

A method to simulate an open boundary problem within the Finite Differences Time Domain (FDTD) approach for the emission of photo-conductive antennas is presented here. For this purpose we use convolutional perfectly matched layers (CPML). In these devices, the semiconductor region, where transient currents are present in simulation time, is considered to be an ”active” medium. This medium is extended virtually beyond its boundaries or the computational domain limits. We explain in this paper how to simulate the transient state of a semiconductor in a CPML region as well as the potential of the method developed to solve conventional practical applications

Impact of Covalent Functionalization on the Aqueous Processability, Catalytic Activity, and Biocompatibility of Chemically Exfoliated MoS2 Nanosheets

Chemically exfoliated MoS2 (ce-MoS2) has emerged in recent years as an attractive two-dimensional material for use in relevant technological applications, but fully exploiting its potential and versatility will most probably require the deployment of appropriate chemical modification strategies. Here, we demonstrate that extensive covalent functionalization of ce-MoS2 nanosheets with acetic acid groups (∼0.4 groups grafted per MoS2 unit) based on the organoiodide chemistry brings a number of benefits in terms of their processability and functionality. Specifically, the acetic acid-functionalized nanosheets were furnished with long-term (>6 months) colloidal stability in aqueous medium at relatively high concentrations, exhibited a markedly improved temporal retention of catalytic activity toward the reduction of nitroarenes, and could be more effectively coupled with silver nanoparticles to form hybrid nanostructures. Furthermore, in vitro cell proliferation tests carried out with murine fibroblasts suggested that the chemical derivatization had a positive effect on the biocompatibility of ce-MoS2. A hydrothermal annealing procedure was also implemented to promote the structural conversion of the functionalized nanosheets from the 1T phase that was induced during the chemical exfoliation step to the original 2H phase of the starting bulk material, while retaining at the same time the aqueous colloidal stability afforded by the presence of the acetic acid groups. Overall, by highlighting the benefits of this type of chemical derivatization, the present work should contribute to strengthen the position of ce-MoS2 as a two-dimensional material of significant practical utility.Financial support from the Spanish Ministerio de Economía y Competitividad (MINECO) and the European Regional Development Fund (FEDER) through project MAT2015-69844-R is gratefully acknowledged, as well as partial support of the ERDF/FEDER. Operative Program of the Región de Murcia 2007–2013. We also acknowledge partial funding by Plan de Ciencia, Tecnología e Innovación 2013-2017 del Principado de Asturias and FEDER through grant GRUPIN14-056.Peer reviewe

Proyecto Educapp

El trabajo a presentar tiene el fin de realizar una investigación para poder proceder con la formulación de una guía de negocios para la idea de un aplicativo móvil llamado “Educapp”, el cual brindará clases personalizadas a alumnos universitarios. El proyecto a elaborar se basa en la creación del aplicativo, en donde se tendrán como principales socios claves a los profesores que brindarán las clases, así como las personas que se encargarán de desarrollar el aplicativo. Va dirigido a los estudiantes universitarios que busquen adquirir clases personalizadas de forma remota, asimismo, va dirigido a los profesores que quieran ofrecer sus servicios en la plataforma. Los canales a implementar son Facebook, los medios BTL, Instagram y revistas educativas. En cuanto al proceso del plan, se han utilizado herramientas esenciales como el Business Model Canvas (BMC), el cual permitió identificar cada una de las necesidades de los segmentos y la forma por la cual se van a satisfacer. De esa forma, se pudo identificar, hacer el prototipo, validarlo, cotizar y aplicar la metodología aprendida a lo largo del curso para tener claro la escalabilidad y viabilidad del negocio, de una manera real. De la misma manera, se realizaron diversos experimentos para validar el problema, la solución y el modelo de negocio. Por un lado, en cuanto a la validación de la solución se usaron 3 experimentos para que obtengan suficientes resultados para conseguir el análisis requerido. Por otro lado, en cuanto a la validación del modelo de negocio se realizaron 4 experimentos con sus respectivas repeticiones. Asimismo, se realizó el plan de ejecución de concierge y simulación de ventas, en donde se realizaron 2 experimentos con sus respectivas repeticiones. Finalmente, se realizó el plan financiero en donde se elaboró la proyección de ventas, la inversión inicial y presupuestos, el flujo de caja, los indicadores financieros, el análisis y viabilidad del proyecto y las distintas etapas del financiamiento.The purpose of the work to be presented is to carry out an investigation in order to proceed with the formulation of a business guide for the idea of ​​a mobile application called "Educapp", which will provide personalized classes to university students. The project to be developed is based on the creation of the application, where the main key partners will be the teachers who will teach the classes, as well as the people who will be in charge of developing the application. Is directed to university students who seek to acquire personalized classes remotely, likewise, it is aimed at professors who want to offer their services on the platform. The channels to be implemented are Facebook, BTL media, Instagram and educational magazines. About the planning process, essential tools such as the Business Model Canvas (BMC) have been used, which allowed us to identify each of the needs of the segments and the way in which they will be satisfied. In this way, it was possible to identify, make the prototype, validate it, quote and apply the methodology learned throughout the course to be clear about the scalability and viability of the business, in a real way. In the same way, various experiments were carried out to validate the problem, the solution and the business model. On the one hand, regarding the validation of the solution, 3 experiments were used to obtain sufficient results to achieve the required analysis. On the other hand, regarding the validation of the business model, 4 experiments were carried out with their respective repetitions. Likewise, the concierge and sales simulation execution plan was carried out, where 2 experiments were carried out with their respective repetitions. Finally, the financial plan was made where the sales projection, the initial investment and budgets, the cash flow, the financial indicators, the analysis and feasibility of the project and the different stages of financing were elaborated.Trabajo de investigació

GA design of small thin-wire antennas: comparison with Sierpinski-type prefractal antennas

A new set of genetically generated electrically small thin-wire antennas with a better performance than that of several families of Sierpinsky prefractal monopoles of the same electrical size at resonance is presentedPeer Reviewe

Aerobic exercise training increases muscle water content in obese middle-age men

Aerobic Exercise Training Increases Muscle Water Content in Obese Middle-Age Men. Med. Sci. Sports Exerc., Vol. 48, No. 5, pp. 00–00, 2016. Purpose: The objective of this study is to determine whether muscle water content (H2Omuscle) expands with training in deconditioned middle-age men and the effects of this expansion in other muscle metabolites. Methods: Eighteen obese (BMI = 33 T 3 kgImj2) untrained (V˙ O2peak = 29 T 7 mLj1Ikgj1Iminj1) metabolic syndrome men completed a 4-month aerobic cycling training program. Vastus lateralis muscle biopsies were collected before and 72 h after the completion of the last training bout. Water content, total protein, glycogen concentration, and citrate synthase activity were measured in biopsy tissue. Body composition was assessed using dual-energy X-ray absorptiometry, and cardiometabolic fitness was measured during an incremental cycling test. Results: Body weight and fat mass were reduced j1.9% and j5.4%, respectively (P G 0.05), whereas leg fat free mass increased with training (1.8%, P = 0.023). Cardiorespiratory fitness (i.e., V˙ O2peak), exercise maximal fat oxidation (i.e., FOmax), and maximal cycling power (i.e., Wmax) improved with training (11%, 33%, and 10%, respectively; P G 0.05). After 4 months of training, H2Omuscle increased from 783 T 18 to 799 T 24 gIkgj1 wet weight (ww) (2%, P = 0.011), whereas muscle protein concentration decreased 11% (145 T 15 to 129 T 13 gIkgj1 ww, P = 0.007). Citrate synthase activity (proxy for mitochondrial density) increased by 31% (17 T 5 to 22 T 5 mmolIminj1Ikgj1 ww, P = 0.024). Muscle glycogen concentration increased by 14% (22 T 7 to 25 T 7 gIkgj1 ww) although without reaching statistical significance when expressed as per kilogram of wet weight (P = 0.15). Conclusions: Our findings suggest that aerobic cycling training increases quadriceps muscle water although reduces muscle protein concentration in obese metabolic syndrome men. Reduced protein concentration coexists with increased leg lean mass suggestive of a water dilution effect that however does impair increased cycling leg power with training

Integración de recursos electrónicos en las bibliotecas del Consorcio de Bibliotecas Universitarias de Andaluzas (CBUA)

En los últimos años, el presupuesto en recursos electrónicos ha ido creciendo paulatinamente en las Bibliotecas Universitarias y como consecuencia las inversiones en este tipo de materiales han ido aumentando, convirtiéndose hoy día la Biblioteca Universitaria en una gran factoría virtual. El Consorcio de Bibliotecas Universitarias Andaluzas (CBUA) que asume entre sus políticas el desarrollo de proyectos para la mejora de la calidad de los servicios a través de la cooperación, consciente de esta situación, acomete el plan de dotar a las Bibliotecas del Consorcio de tecnologías centradas en el usuario, para hacer más accesibles las colecciones de recursos electrónicos y poder competir en la Europa del conocimiento con parámetros de calidad. Se presenta el proyecto que está llevando a cabo el Grupo de Trabajo de MAP y ERM del CBUA, de implementación y puesta en marcha de herramientas, para el acceso, integración y gestión de los recursos electrónicos en las Bibliotecas Universitarias Andaluzas, para un mejor uso de las colecciones digitales contratadas, que redundará en la calidad y mejora de los servicios prestados. Se enumeran las fases del proyecto, los objetivos operativos, las líneas de acción, las acciones realizadas, la documentación generada, la difusión y formación en las nuevas herramientas y la repercusión que está teniendo en las Bibliotecas del CBU

Revista de Vertebrados de la Estación Biológica de Doñana

Captura de Petromyzon marinus lo en las Marismas del GuadalquivirEstudio sobre la Lagartiia de Valverde Algyroides marchi (Reptilia, Lacertidae)Dimorfismo sexual en Psammodromuus algirus (Reptilia, Lacertidae)Mecanismos de parasitización por Clamator glandarius y defensa por Pica pica.Nidificación de Cyanopica cyana en Doñana.Reproducción de la Urraca (P.pica) en DoñanaNesting relationship between Columba palambus and Milvus migransBiometría y dimorfismo sexual en el Calamón (Polphyrio porphyrio).Sobre sexo, mecanismos y proceso de reproducciónen el Buitre Leonado (Gyps fulvus)Aves anilladas por la Estación Biológica de Doñana. Informe Nº 1. (Años 1964 a 1971)Dimorfismo sexual y diferenciación de edades en Sturnus unicolor Temm.Contribución al estudio de la biología y ecología del Lirón Careto, Eliomys quercinus Linnaeus 1766, en Iberia Central, Parte 1: Crecimiento, Reproducción y Nidificación.Sobre el Lobo (Canis lupus) ibérico:1. Dimorfismo sexual en cráneosMorfología y dimorfismo sexual de la pelvis de Pitymys duodecimcostatusAlgunos aspectos del diformismo sexual en el cráneo de las Ginetas españolas, (Genetta genetta) (L.) 1758Peer reviewe

La salud de las ciudades en la agenda global de desarrollo : desafíos para Colombia

RESUMEN: En esta Observación, que cuenta con la colaboración de expertos del país y del exterior, se adelanta una revisión sobre los alcances de los Objetivos de Desarrollo del Milenio -ODM- en Colombia y las perspectivas de los mismos para la salud pública y para las ciudades del país y de América Latina. Como una contribución especial, el GES plantea varios aspectos para poner en marcha una estrategia de Ciudad Saludable, que esté articulada con los ODS.2. La salud en los Objetivos de Desarrollo Sostenible: perspectiva urbana Alternativas de la Salud Pública en los Objetivos de Desarrollo Sostenible (ODS) - Álvaro Franco-Giraldo. De los ODM a los ODS: Ciudades con desarrollo sostenible 2030 - Amelia Fernández Juan. Los Objetivos de Desarrollo Sostenible (ODS) y las Ciudades en América Latina y el Caribe - Vera Kiss. La Salud en los Objetivos de Desarrollo Sostenible: perspectivas y retos de ciudad - Grupo de Economía de la Salu

High Performance Na-O2 Batteries and Printed Microsupercapacitors Based on Water-Processable, Biomolecule-Assisted Anodic Graphene

Integrated approaches that expedite the production and processing of graphene into useful structures and devices, particularly through simple and environmentally friendly strategies, are highly desirable in the efforts to implement this two-dimensional material in state-of-the-art electrochemical energy storage technologies. Here, we introduce natural nucleotides (e.g., adenosine monophosphate) as bifunctional agents for the electrochemical exfoliation and dispersion of graphene nanosheets in water. Acting both as exfoliating electrolytes and colloidal stabilizers, these biomolecules facilitated access to aqueous graphene bio-inks that could be readily processed into aerogels and inkjet-printed interdigitated patterns. Na-O2 batteries assembled with the graphene-derived aerogels as the cathode and a glyme-based electrolyte exhibited a full discharge capacity of ∼3.8 mAh cm–2 at a current density of 0.2 mA cm–2. Moreover, shallow cycling experiments (0.5 mAh cm–2) boasted a capacity retention of 94% after 50 cycles, which outperformed the cycle life of prior graphene-based cathodes for this type of battery. The positive effect of the nucleotide-adsorbed nanosheets on the battery performance is discussed and related to the presence of the phosphate group in these biomolecules. Microsupercapacitors made from the interdigitated graphene patterns as the electrodes also displayed a competitive performance, affording areal and volumetric energy densities of 0.03 μWh cm–2 and 1.2 mWh cm–3 at power densities of 0.003 mW cm–2 and 0.1 W cm–3, respectively. Taken together, by offering a green and straightforward route to different types of functional graphene-based materials, the present results are expected to ease the development of novel energy storage technologies that exploit the attractions of graphene.Funding by the Spanish Ministerio de Economía y Competitividad (MINECO) and the European Regional Development Fund (ERDF) through project MAT2015-69844-R and by the Spanish Ministerio de Ciencia, Innovación y Universidades and ERDF through project RTI2018-100832-B-I00 is gratefully acknowledged. Partial funding by Plan de Ciencia, Tecnología e Innovación (PCTI) 2013-2017 del Principado de Asturias and the ERDF through project IDI/2018/000233 is also acknowledged. J.M.M. is grateful to the Spanish Ministerio de Educación, Cultura y Deporte (MECD) for his pre-doctoral contract (FPU14/00792). J.N.C. acknowledges the ERC Adv. Gr. FUTUREPRINT. This work was also financially supported by the European Union (Graphene Flagship, Core 2, Grant number 785219).Peer reviewe