Design of an embedded camera with an AX.25 transmitter

The main purpose of this project is ti develop a full product able to read data from several sensors to obtain positional and weather data, two cameras are also included. This data is then sent by the radio protocol AX.25. This proyect tries to tackle the design as if it was a comercial hardware producr, placing the focus on teh several stages of hrdware design, studying every layer on its own. The use of emergent technologies in the horld of hobby electronics is pretended, making use of breakout boards to facilitate the access of many people to these technologies.El proposito principal de este proyecto es desarrolllar un producto completo capaz de leer varios sensores tanto meteorológicos como de posicionamiento, ademas de dos cámaras y enviar los datos resultantes usando el protocol de radio AX.25 El proyecto intenta abordar este diseño como si de un producto de hardware para uso comercial se tratase, poniendo enfoque sobre las diferentes partes del diseño de hardware y estudiando capa parte por separado. Se pretende además el uso de tecnologias emergentes en el mundo de la electrónica de hobby como son las breakout boards para facilitar el acceso a mucha gente de estas tecnologías.Universidad de Granada. Departamento de Electrónica y Tecnología de ComputadoresGranaSAT: Aerospace Electronics GroupUniversidad de Granada. Departamento de Electrónica y Tecnología de Computadores. Grado en Ingeniería de Tecnologías de Telecomunicació

A Solid State Transformer model for power flow calculations

This paper presents the implementation of a Solid State Transformer (SST) model in OpenDSS. The goal is to develop a SST model that could be useful for assessing the impact that the replacement of the conventional iron-and-copper transformer with the SST can have on the distribution system performance. Test distribution systems of different characteristics and size have been simulated during different time periods. The simulations have been carried out assuming voltage-dependent loads and considering that power flow through either the HV/MV substation transformer or any of the MV/LV distribution transformers can be bidirectional. Simulation results prove that a positive impact should be expected on voltages at both MV and LV levels, but the efficiency of current SST designs should be improved.Postprint (author's final draft

A virtual power plant model for time-driven power flow calculations

This paper presents the implementation of a custom-made virtual power plant model in OpenDSS. The goal is to develop a model adequate for time-driven power flow calculations in distribution systems. The virtual power plant is modeled as the aggregation of renewable generation and energy storage connected to the distribution system through an inverter. The implemented operation mode allows the virtual power plant to act as a single dispatchable generation unit. The case studies presented in the paper demonstrate that the model behaves according to the specified control algorithm and show how it can be incorporated into the solution scheme of a general parallel genetic algorithm in order to obtain the optimal day-ahead dispatch. Simulation results exhibit a clear benefit from the deployment of a virtual power plant when compared to distributed generation based only on renewable intermittent generation.Peer ReviewedPostprint (published version

Reliability analysis of distribution systems with photovoltaic generation using a power flow simulator and a parallel Monte Carlo approach

This paper presents a Monte Carlo approach for reliability assessment of distribution systems with distributed generation using parallel computing. The calculations are carried out with a royalty-free power flow simulator, OpenDSS (Open Distribution System Simulator). The procedure has been implemented in an environment in which OpenDSS is driven from MATLAB. The test system is an overhead distribution system represented by means of a three-phase model that includes protective devices. The paper details the implemented procedure, which can be applied to systems with or without distributed generation, includes an illustrative case study and summarizes the results derived from the analysis of the test system during one year. The goal is to evaluate the test system performance considering different scenarios with different level of system automation and reconfiguration, and assess the impact that distributed photovoltaic generation can have on that performance. Several reliability indices, including those related to the impact of distributed generation, are obtained for every scenario.Postprint (published version

Mortalidad y crecimiento vegetativo en la provincia de Guadalajara, 1700-1865

This working paper central purpose is to study the magnitude and the evolution of mortality in the Guadalajara province between 1700 and 1865. The parish registers of baptisms and deaths in a sample of 25 local entities are the main source of data. The principal finding is the slightly downward trend in the gross mortality rate between 1750 and 1830s, only broken by a brisk surge during the first years of the XIX century. The dominant factor in the downward pattern is a pullback in adult mortalit

A review of tools, models and techniques for long-term assessment of distribution systems using OpenDSS and parallel computing

Many distribution system studies require long-term evaluations (e.g. for one year or more): Energy loss minimization, reliability assessment, or optimal rating of distributed energy resources should be based on long-term simulations of the distribution system. This paper summarizes the work carried out by the authors to perform long-term studies of large distribution systems using an OpenDSS-MATLAB environment and parallel computing. The paper details the tools, models, and procedures used by the authors in optimal allocation of distributed resources, reliability assessment of distribution systems with and without distributed generation, optimal rating of energy storage systems, or impact analysis of the solid state transformer. Since in most cases, the developed procedures were implemented for application in a multicore installation, a summary of capabilities required for parallel computing applications is also included. The approaches chosen for carrying out those studies used the traditional Monte Carlo method, clustering techniques or genetic algorithms. Custom-made models for application with OpenDSS were required in some studies: A summary of the characteristics of those models and their implementation are also included.Peer ReviewedPostprint (published version

Forest Ecosystem Services: An Analysis of Worldwide Research

The relevance of forests to sustain human well-being and the serious threats they face have led to a notable increase of research works on forest ecosystem services during the last few years. This paper analyses the worldwide research dynamics on forest ecosystem services in the period from 1998 to 2017. A bibliometric analysis of 4284 articles was conducted. The results showed that the number of published research articles has especially increased during the last five years. In total, 68.63% of the articles were published in this period. This research line experiences a growing trend superior to the general publishing trend on forest research. In spite of this increase, its relative significance within the forest research is still limited. The most productive subject areas corresponded to Environmental Science, Agricultural and Biological Sciences and Social Sciences Economic topics are understudied. The scientific production is published in a wide range of journals. The three first publishing countries are United States, China and the United Kingdom. The most productive authors are attached to diverse research centres and their contributions are relatively recent. A high level of international cooperation has been observed between countries, institutions and authors. The findings of this study are useful for researchers since they give them an overview of the worldwide research trends on forest ecosystem services

Some commentaries on confidence intervals of the mean in a Normal population

In this paper, a study on the length of confidence intervals of the mean in a Normal population when the variance is either known or unknown is carried out. It is also proved that ignoring the population variance always leads to a worse interval than when such a variance is taken into accoun

La población de Guadalajara,1500-1650

Tesis inédita leída el 17-12-2008 en la Universidad Autónoma de Madrid, Facultad de Filosofía y Letras, Departamento de Historia Modern

Dibujo análisis e ideación gráfica 2 : Iniciación Proyectos Arquitectónicos. Memoria del curso 2012

Programación, enunciados y resultados del curso de Dibujo Análisis e Ideación Gráfica Arquitectónica-2 (DAI-2) asignatura que se encarga de la iniciación a Proyectos Arquitectónicos, a través de distintas herramientas . En la progamación se tiene en cuenta la necesidad de aproximar las experiencias de los estudiantes a los procesos productivo/creativos de la arquitectura. Se aplica una didáctica dialógica: arte/arquitectura/lugar/construcción/pensamiento. Un método pedagógico articulado en tres Bloques: Bloque1 Introducción: idear/construir/proyectar. Bloque 2: proyectar/planificar. Bloque 3: proyectar/ investiga