Perturbation of the sierpinski antenna to allocate the operating bands

A scheme for modifying the spacing between the bands of the Sierpinski antenna is introduced. Experimental results of two novel designs of fractal antennas suggest that the fractal structure can be perturbed to enable the log-period to be changed while still maintaining the multiband behaviour of the antenna.Peer ReviewedPostprint (published version

High resolution mapping and seismic imaging in seismogenic zones: Application in SW Iberia and Almeria margin

Marine Technology Workshop (Martech05), 17-18 November 2005, Vilanova i la Geltrú, Barcelona.-- 3 pages, 1 figureThe authors acknowledge the support of the MCYT Acción Especial HITS (REN2000-2150-E), European Commission European Access of Seafloor Survey Systems EASSS-III programme (HPRI-CT99-0047), Spanish national Project IMPULS (REN2003-05996MAR) and ESF EUROMARGINS SWIM project (REN2002-11234-E-MAR)Peer Reviewe

Paleoseismology of active faults based on multiscale seismic imaging

The study of active structures offshore requires very-high resolution seismic imaging in order to observe the most recent layers below sea floor. In the other hand, high penetration methods are necessary to observe deeper reflections for understanding the evolution of the structure throughout the time. The aim of our study is to establish the seismic potential of the offshore segment of the Carboneras Fault, Eastern Betics, based on multiscale seismic imaging. Three different scale methods have been acquired and are compared here: very-high-resolution sub-bottom profiler TOPAS, very-high-resolution single-channel seismic (Sparker) and high-resolution multi-channel seismic. From seismic profiles, faulted Quaternary layers suggest that the Carboneras Fault is active. Sediment coring and dating analysis are used to consider ages for key reflectors observed in TOPAS profiles, and a change in the vertical slip-rate through the Quaternary is inferred.Peer Reviewe

Wide-angle reflection and refraction seismic profile from the outer part of the gulf of Cadiz: nearest-seis cruise.

We will explain the first interpretations from a marine refraction and wide-angle reflection seismic profile acquired in the outer part of the Gulf of Cadiz in November 2008, in the framework of the Nearest-Seis cruise.Peer Reviewe

Guidance that we have, we want the guidance, in the university field

Con la implantación del Espacio Europeo de Educación Superior (EEES), el alumnado se convierte en el referente del proceso de enseñanza-aprendizaje, y el profesorado deja de ser un mero transmisor de conocimientos, para convertirse en mediador, facilitador o guía de dicho proceso. Los nuevos grados llevan consigo la implantación de Sistemas de Garantía de Calidad, y concebimos, pues, a la orientación educativa como parte integrante de planes estratégicos, que conduzcan a la mejora de la calidad en nuestro ámbito de trabajo, en la universidad. Creemos, pues, que es muy necesario que existan en este nivel educativo servicios de orientación, en cada universidad e, incluso, en cada facultad, que puedan contribuir a la mejora de los procesos de enseñanza- aprendizaje y no sólo relacionados con la orientación profesional. Ya que, como hemos indicado anteriormente, los consideramos de capital importancia en esta nueva concepción del EEES. El procedimiento que hemos seguido ha sido el análisis de lo que a día de hoy está implementado en la Universidad de Málaga, desde los servicios que hay creados, centrándonos en la realidad actual de la situación en la Facultad de Ciencias de la Educación y en el Centro adscrito de Magisterio “María Inmaculada” de Antequera. Y también comentaremos los servicios implementados en la Universidad de Granada, en concreto, referidos a la Facultad de Educación y Humanidades de Melilla. Del resultado de dicho análisis, concluiremos que la orientación que tenemos no es la que queremos, pero intentaremos ofrecer las pautas de cómo nos gustaría que fuera.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

New seismic images of the crust across the Rivera Plate and Jalisco Block (Mexico)

European Geosciences Union General Assembly 2015 (EGU2015), 12-17 April 2015, Vienna, Austria.-- 1 pageDuring the spring and summer of 2014, we achieved an extensive offshore geophysical experiment at West Coast of México entitled "Crustal characterization of the Rivera Plate-Jalisco Block boundary and its implications for seismic and tsunami hazard assessment (TSUJAL)". The project is the result of continuous scientific collaboration between institutions in Mexico and Spain, whose main objective is to study the lithospheric structure at the collision zone between Rivera, North America Plates and the Jalisco Block, and identifying submarine structures which can potentially be tsunamigenic sources The active phase of this project carried out in February and March of 2014, we acquired around 5200 km of Multichannel Seismic Reflection (MCS) together with multibeam bathymetry and potential fields (gravity and magnetism) data. Moreover, a wide angle experiment was performed, deploying 16 OBS in 32 locations in Jalisco and Nayarit offshore regions, also recorded on a terrestrial network of 100 portable seismic stations in 240 locations across 5 seismic profiles of 200-300 km in length combined with the Seismological Network of the State of Jalisco (SisVOc). In addition, 8 land seismic stations were installed in Marías Islands and Isabel Island. These instruments registered, in continuous mode, the airgun shots generated by airgun array of 5800 ci, shooting every 120 s. The UK vessel RRS James Cook participated in this project as a part of the exchange program between Spanish and English scientific vessels, she was responsible of marine seismic experiment (MCS & WA) using a 6 km length streamer and a high capacity airgun array. Furthermore, the ARM Holzinger and RV El Puma participated in this project and were provided by the Mexican Navy and UNAM, respectively. The second phase of this project was achieved in June 2014, where 100 short period seismic stations were installed along a 200 km seismic profile from La Caldera de la Primavera (Guadalajara) to Barra de Navidad (Jalisco coast).These instruments registered 3 borehole explosions of 1000 kg specially made for this project, in the northern, central and southern parts of this profile. These new data provide a dense sampling of tectonic plates, W Mexico, and give new seismic constraints on the deformation along and across the subduction zone, accretionary wedge size, at contact between Rivera and North American Plates and, in the transition zone between oceanic and continental crustPeer Reviewe

Configuration of geological domains and geodynamic evolution of the Africa-Eurasia plate boundary off SW Iberia revisited based on seismic velocity and density models

European Geosciences Union General Assembly 2015 (EGU2015), 12-17 April 2015, Vienna, Austria.-- 1 pageWe present a new classification of geological (basement) domains at the Africa-Eurasia plate boundary offshore SW Iberia, together with a regional geodynamic reconstruction spanning from the Mesozoic extension to the Neogene-to-present-day convergence. It is based on seismic velocity and density models along two regional wide- angle seismic transects, one running NW-SE from the Tagus to the Seine abyssal plains, and the other running N-S from S Portugal to the Seine Abyssal Plain, combined with previously available information. The seismic velocity and density structure at the Seine Abyssal Plain and the internal Gulf of Cadiz indicates the presence of a highly heterogeneous oceanic crust, similar to that described in ultra-slow spreading centers, whereas in the Horseshoe and Tagus abyssal plains, the basement structure resembles that of exhumed mantle sections identified in the Northern Atlantic margin. The integration of all this new information allows defining the presence of three oceanic domains off SW Iberia: (1) the Seine Abyssal Plain domain, generated during the first stages of slow seafloor spreading in the NE segment of the Central Atlantic (Early Jurassic); (2) the Gulf of Cadiz domain, made of oceanic crust generated in the Alpine-Tethys spreading system between Iberia and Africa, which was coeval with the formation of the Seine Abyssal Plain domain and lasted up to the North Atlantic continental break-up (Late Jurassic); and (3) the Gorringe Bank domain, mainly made of rocks exhumed from the mantle with little synchronous magmatism, which formed during the first stages of North Atlantic opening (Early Cretaceous). Our models suggest that the Seine Abyssal Plain and Gulf of Cadiz domains are separated by the Lineament South strike-slip fault, whereas the Gulf of Cadiz and Gorringe Bank domains appear to be limited by a deep thrust fault located at the center of the Horseshoe Abyssal Plain, which coincides with the seismicity cluster nucleated in the middle of the plain that shows moment tensor solutions of reverse faulting at depths of 40–60 km. The formation and evolution of these three domains during the Mesozoic is key to understand the sequence of events that occurred during the first stages of opening of the Northern Atlantic and its connection and interplay with the Western Mediterranean basinPeer Reviewe

New deep multichannel seismic reflection images from the Alboran Basin: The TOPOMED-GASSIS dataset

European Geosciences Union General Assembly 2015 (EGU2015), 12-17 April 2015, Vienna, Austria.-- 1 pageThe Alboran Basin (Western Mediterranean) is located between the Iberian Peninsula and Africa. Along this basin runs the diffuse plate boundary between Iberia and Africa. In order to improve the knowledge of the lithospheric structure in this region, the TOPOMED-GASSIS cruise took place during October 2011 on board the RV Sarmiento de Gamboa. During this cruise, the new deep multichannel seismic acquisition system was used for the first time. The equipment used were two high volume G-gun arrays (2000 psi / 2500 psi) and up to 6 km long Sercel multichannel digital streamer (408 / 480 active channels) towed behind the vessel. The results correspond to a series of multichannel seismic profiles with unprecedented quality, which allows us to apply state of the art processing and imaging techniques to obtain the deep tectonic structure of the plate boundary while keeping a good resolution in the sedimentary infill of the basin. A complete processing sequence has been used in order to increase the signal to noise ratio, including deconvolution, multiple attenuation and time migration. A high-quality deep penetration dataset has been acquired using the new instrumentation allowing to image the whole basin at a crustal scale. The results are high-quality sections for interpretation through frequency preservation, effective multiple attenuation and velocity analysis. Moreover, we will carry out Pre-Stack Depth Migration algorithms to selected profiles, in order to obtain the real geometry of the structures at depthPeer Reviewe