Development of an Emergency Radio Beacon for Small Unmanned Aerial Vehicles

Emergency locator transmitters (ELTs) used to locate manned aircrafts are not well suited to find and recover small crashed unmanned aerial vehicles (UAVs). ELTs utilize an international satellite system for search and rescue (Cospas-Sarsat System), which should leverage its expensive resources to save lives as a priority. Besides, ELTs are too big and heavy to be used within small UAVs. Some of the existing solutions for this problem are based on receivers that detect signal strength, which may be a long and tedious process not suitable for user needs. Others do not have enough range or require radio license and expensive amateur radio receivers. This paper presents an emergency radio beacon specifically designed to locate small UAVs. It is triggered automatically in the event of a crash and allows finding and recovering a crashed UAV in a fast and simple way. It meets not only the required specifications of user-friendliness, size and weight of this kind of application, but also it is a high precision and low cost device. Besides, it has enough range and endurance. The experiments carried out show the operation of the proposed system

The reality of immigrant women in the Spanish prisons through their discourse: examples of violence, marginalization and frustrated reinsertion

Este artículo pretende ser una contribución a la realidad de las mujeres inmigrantes dentro de las cárceles españolas debido a que existe un proceso de reincidencia de las mujeres muy elevado (un 29% de las reclusas). Además, esta investigación tiene como objetivo señalar la dura realidad de estas mujeres en las cárceles españolas a través de sus discursos, de cómo se construyen y de cómo viven el día a día en un espacio carcelario. La hipótesis de la cual partimos es que las mujeres inmigrantes están más marginadas que los hombres en las cárceles españolas y concluimos que la dura realidad en la que viven dichas mujeres no facilita su reinserción dentro de la sociedad.This article intends to be a contribution to the reality of immigrant women in the Spanish prisons due to the fact that there is a high process of women’s repetition (29% of prisoners). Moreover, this research has as objective to point out the hard reality that these women in the Spanish prisons through their discourses, through how they portray themselves and through how they live their daily life in jail. Our hypothesis is that women are more marginalised than men in the Spanish prisons and we conclude that the hard reality that many of the said women live does not facilitate their reinsertion inside society.Este artículo se inserta dentro del Plan Nacional de Investigación, Proyecto de Investigación I+D+i, denominado: ‘Mujeres reclusas drogodependientes y su reinserción social. Estudio socioeducativo y propuestas de acción’ (EDU2009-13408), financiado por el Ministerio de Economía y Competitividad (MICCIN) del gobierno español

Comparison of humic and fulvic acids from different soils by pyrolysis-mass spectrometry

7 pages, 3 figures, 11 references.[EN]: Several recent publications showed the usefulness of pyrolysis mass spectrometry for the characterization of the organic matter of total soil samples and of soil organic matter fractions. Soil humic and fulvic acidS were pyrolyzed by the Curiepoint pyrolysis technique and were analyzed with a fast scanning low voltage electron impact mass spectrometer. Humic acids from different soil types and geographical distribution were characterized by series of homologous compounds, which were derived from protein, polysaccharides, alkanes, and lignin phenols. Fulvic acids showed great similarities and few variations in the relative abundance of pyrolysis products, with major peaks arising from polysaccharides: Aromatics and phenols were scanty or hardly detected.[ES]: Publicaciones recientes han mostrado la utilidad de la pirólisis-espectrometría de masas para la caracterización de la materia orgánica del suelo y sus fracciones. Ácidos húmicos y fúlvicos fueron pirolizados usando la técnica de la pirólisis por punto de Curie y analizados con un espectrómetro de masas de impacto electrónico a bajo voltaje. Los ácidos húmicos de diferentes tipos de suelos y orígenes geográficos se caracterizaron por series de compuestos homólogos, encontrándose derivados de proteínas, polisacáridos, alcanos y fenoles procedentes de la lignina. Los ácidos fúlvicos se mostraron muy similares y con pocas variaciones en la abundancia relativa de productos de pirólisis, hallándose que los picos mayores procedían de la pirólisis, de polisacáridos, mientras que, por el contrario, los compuestos aromáticos y fenoles fueron escasos y difícilmente detectables.This work was made possible by research grants from the Deutsche Forschungsgemeinschaft, the Dutcb Foundation Research on Matter (F.O.M) und the Dutch Ministry of Health and Environmental Hygiene.Peer reviewe

Multi-task Implementation for Image Reconstruction of an AER Communication

Address-Event-Representation (AER) is a communication protocol for transferring spikes between bio-inspired chips. Such systems may consist of a hierarchical structure with several chips that transmit spikes among them in real time, while performing some processing. There exist several AER tools to help in developing and testing AER based systems. These tools require the use of a computer to allow the processing of the event information, reaching very high bandwidth at the AER communication level. We propose to use an embedded platform based on multi-task operating system to allow both, the AER communication and the AER processing without a laptop or a computer. We have connected and programmed a Gumstix computer to process Address- Event information and measured the performance referred to the previous AER tools solutions. In this paper, we present and study the performance of a new philosophy of a frame-grabber AER tool based on a multi-task environment, composed by the Intel XScale processor governed by an embedded GNU/Linux system.Ministerio de Ciencia e Innovación TEC2006-11730-C03-0

"Judio vesino en el Alcaçar del Castillo de la Dicha çibdad de Lorca": Judería, poder económico y entorno social en una ciudad de la frontera de Granada

The presence of the Jewish community in the border town of Lorca has been little known to historians who study this minority group in the Late Middle Ages. Recent archaeological studies have brought to light the community, which had settled in Lorca during the Repopulation by Alfonso X in the 13th century. This paper studies the life of the Jewish community in the historical and geographical context of the Border with the Kingdom of Granada

Nuevas coordenadas en el ámbito de la web 2.0: el caso de la publicidad comportamental

Una reciente modalidad publicitaria que está protagonizando un notable éxito en Internet es la publicidad comportamental. Aunque puede suponer ciertas ventajas para las empresas y los usuarios, no está exenta de riesgos sobre todo en materia de privacidad. Para, precisamente, proteger al consumidor y/o usuario en esta novedosa faceta de la Web 2.0 se han aprobado un elenco de normas legales complementadas por el sugerente fenómeno de la autorregulación.A new mode of advertising, behavioural advertising, is enjoying considerable success on the Internet. But the advantages for companies and users are weighed against the risks to privacy. A range oflegal norms have been approved to complement self-regulation in arder to protect the consumer and / or user of this new facet of Web 2.0

Using Buildroot for building Embedded Linux Systems (BeagleBone Black)

This document describes the basic steps to develop and embedded Linux-based system using the BeagleBone Black (BBB). The document has been specifically written to use a BBB development system based on the AM335x Texas Instruments Sitara processor. All the software elements used to build the Linux distribution have a GPL licens

Mechanical analysis of Genoa 03 stirling engine

Due to the new technologies development based on renewable sources of energy, in recent years Stirling engines have become very important in the energetic sector. Many of them do not allow the use of fluid lubricants and, thus, the effect of friction losses is important. For this purpose, a mathematical model has been developed based on the force balance in the crankshaft using the pressure distribution in the cylinders. The aim of this work is to characterize the mechanical losses in a Genoa 03 Stirling engine using a numerical model and experimentally via the drag method. The results of this model have been compared with those obtained experimentally on Genoa 03 Stirling engine. In the experimental results, a proportional increase in friction torque due to the average pressure and the speed of the crankshaft is observed. The first of these is caused by an increase of dry friction forces and the second, by the viscous friction between the working fluid and the inner walls of the engine. Also in this paper, irreversible processes in a beta type Stirling engine have been investigated in order to highlight the impact of losses on mechanical power and its performance. This article develops the first study of the mechanical losses of Genoa 03 experimental Stirling engine, which has an output power of 3 kW. Although the model response follows the same trends as the experiments, those simplifications provide errors which become more significant as the engine speed increases.Ministerio de Economía y Competitividad ENE2013-43465-

Emissions pollutant from diesel, biodiesel and natural gas refuse collection vehicles in urban areas

Urban pollution is more and more concern due to human health implications. In that way, emissions pollutant from commercial vehicles which move daily at fixed itineraries such as, buses and refuse collection vehicles must be monitored. In this study we have aimed to show the results of the test made on refuse collection vehicles, in real conditions, with regard to their energy consumption and emissions pollutant. A comparative study is carried out with regard to CO, HC, NOx, PM and greenhouse gas emissions, in respect of two types of engine with three different fuels. The fuels analyzed are diesel, biodiesel (B50 and B100) and compressed natural gas (CNG)

Wing morphometrics for identification of forensically important blowflies (Diptera: Calliphoridae) in Iberian Peninsula

Calliphoridae is a family of Diptera of great forensic interest because some of its species belong to the sarcosaprophagous diptera community, as their larvae are necrophagous or necrophilous. In the Iberian Peninsula there are six species that stand out, as they are the first insects to arrive at carrion: Calliphora vicina, Calliphora vomitoria, Lucilia sericata, Lucilia caesar, Chrysomya albiceps and Chrysomya megacephala. To differentiate among these blowflies, we compared the value of using traditional and geometric morphometrics by performing a morphometric analysis of the wings (shape and size). A total of 600 individuals were considered, segregated by species and sex equally. Seventeen landmarks per wing were recognized, and then centroid size and shape analyses were performed using geometric morphometrics, and size using traditional morphometrics, to identify species and sex. The results showed differences in shape among the species and it was found that landmarks 2 to 11 were the most variable, while the landmarks located at the base of the wings were relatively stable. However, according to both traditional and geometric morphometrics, no significant differences were found among species in wing size (Calliphora vicina, Chrysomya megacephala and Lucilia caesar were indistinguishable), but females were larger than males (except for the two Chrysomya species). Our results indicate that the use of geometric morphometrics to analyze wing configuration (shape) is an easy-to-use tool that helps to distinguish among common blowfly species of forensic importance.AMS was supported by projects of University of Alicante (No. GRE09-27) and Generalitat Valenciana (No. GV2011/039)