Split square resonators using high dielectric constant

This paper reports the design of a split ring resonator bandpass filter. The design is based on coupling coefficient filter and the novelty of the proposed design is possibility to miniaturize the structure by including a new kind of dielectric resonator fabricated with a commercial high dielectric constant EPOXY paste. Equivalent circuit model is discussed, establishing a clear relation between each component and physical parameter of the proposed design. Excellent agreement between electromagnetic simulation and measured of band pass filter at 1.65 GHz is found.Postprint (author's final draft

Detección de patrones en episodios de fibrilación auricular mediante teoría de campos vectoriales

[EN] Atrial fibrillation (AF) is the most common cardiac arrhythmia nowadays. It is an alteration of normal cardiac conductivity so that the atria are not adequately contraction and ventricles do it irregularly and excessively fast. Despite many years of research, the mechanisms of AF are still poorly understood. Recent studies support that the pulmonary veins play a substantial role in triggering and in driving the fibrillatory activity, which appear ectopic foci that can reach and overall atrial wall conduction patterns, whose essential movement is 'rotor '. The work focuses on the detection of these patterns in videos driving optical mapping using mathematical parameters such as gradient, divergence and curl. The results show that divergence is a robust mechanism for detecting rotors and its shaft allows us to detect and track the same in a particular episode of AF, like curl.[ES] La fibrilación auricular (FA) es la arritmia cardiaca más frecuente de nuestros días. Se trata de una alteración de la conductividad normal del corazón de manera que las aurículas no se contraen adecuadamente y los ventrículos lo hacen de manera irregular y excesivamente rápida. A pesar de los años de investigación, los mecanismos por los cuales se produce la FA son todavía poco conocidos. Los últimos trabajos de investigación apuntan que las venas pulmonares juegan un papel importante en la activación y la conducción de la actividad fibrilatoria, en las cuales aparecen focos ectópicos que pueden llegar a la pared auricular y general patrones de conducción, cuyo movimiento fundamental es el ‘rotor’. El trabajo se centra en la detección de estos patrones de conducción en videos de mapeo óptico cardiaco mediante parámetros matemáticos como el gradiente, la divergencia y el rotacional. Los resultados muestran que la divergencia es un mecanismo robusto para la detección de rotores y que nos permite detectar su eje y realizar un seguimiento del mismo en un episodio concreto de FA al igual que el rotacional.Martínez Iranzo, Ú. (2013). Detección de patrones en episodios de fibrilación auricular mediante teoría de campos vectoriales. http://hdl.handle.net/10251/43826Archivo delegad

Split square resonators using high dielectric constant

This paper reports the design of a split ring resonator bandpass filter. The design is based on coupling coefficient filter and the novelty of the proposed design is possibility to miniaturize the structure by including a new kind of dielectric resonator fabricated with a commercial high dielectric constant EPOXY paste. Equivalent circuit model is discussed, establishing a clear relation between each component and physical parameter of the proposed design. Excellent agreement between electromagnetic simulation and measured of band pass filter at 1.65 GHz is found

Multimode ultra-wideband filters by using a grounded open ring resonator

This paper reports a novel multimode resonator (MMR) ultra-wide band-pass (UWB) filter design using a grounded open ring resonator. The utilization of 30 μm gaps between input ports and the central resonator achieve high coupling level. Five resonant modes are used to perform a 128% fractional bandwidth at 4.3 GHz. The fabricated prototype exhibits a band-pass with insertion losses around 0.5 dB. A theoretical model based on transmission lines matrices is proposed and used to explore the limits of the design through different parametric analysis. Excellent agreement between theoretical predictions, electromagnetic simulations and measurement are found

New approach to electronic band gap filtering structures combining microstrip and dielectric resonators

Proceeding of: 2013 Asia-Pacific Microwave Conference Proceedings (APMC), Seoul, Korea (South), 5-8 Nov. 2013A novel design combining standard microstrip technology with single ring resonator and high dielectric constant resonator for design of low and band pass filtering electromagnetic band gap(EBG) structures, operating in the range from 1 to 20 GHz is presented in this paper. The design is based on a high dielectric constant resonator embedded in a microstrip structure substrate. The dielectric resonator is fabricated by using commercial high dielectric constant EPOXY paste in a process compatible with serigraphy and screen printing technology.This work has been supported by Ministerio de Ciencia y Educación of the Spanish government under the project TEC2010-16060

NedCodo/IBV, haciendo fácil y objetiva la valoración biomecánica del codo

NedCodo/IBV is a software application that has been developed by the Institute of Biomechanics (IBV) to assist professionals in the functional assessment of the elbow. Of particular note is its usefulness in the study of such complex pathologies as epicondylosis or lateral epicondylitis. It is a Class I medical device that has been specifically designed to return objective and nonmanipulable results of elbow functionality in an agile and simple way. The results are compared to databases to facilitate interpretation and the decision-making process in relation to therapeutic management and reintegration into the workplace.NedCodo/IBV es una aplicación software desarrollada por el Instituto de Biomecánica (IBV) para asistir al profesional en la evaluación funcional del codo, destacando su utilidad en el estudio de patologías complejas como la epicondilosis o epicondilitis lateral. Se trata de un producto sanitario Clase I, especialmente diseñado para ofrecer resultados objetivos y no manipulables de la función del codo de una forma ágil y sencilla. Los resultados se comparan con bases de datos para facilitar la interpretación y toma de decisiones relacionadas con el manejo terapéutico y la reintegración laboral