Evolution of the upper proterozoic continental deposits from «La Serena», (Southern Central Iberian Zone) Badajoz, Spain

[Resumen] Se describen por primera vez afloramientos, recientemente descubiertos, del Alcudiense Superior, en «La Serena», Badajoz. Se demuestra el carácter continental de la parte basal de varias secuencias, y se esboza un esquema paleogeográfico, que implica una línea de,costa hacia el Oeste, y la diferenciación de tres ciclos sedimentarios.[Abstract] Sorne recently discovered Upper Alcudian outcrops, from «La Serena» region in Badajoz province, are described in this paper for the first time. The basal pan of most of the studied logs shows continental characteristics here depicted; a paleogeographical scheme is also submitted. This latter implies moving the suggested coast line westward for the first cycle. Three local sedimentary cycles are here proposed and correlated with those from well known areas

Reconocimiento geológico y métodos de estabilización de taludes rocosos en formaciones volcánicas del sur de Gran Canaria y Fuerteventura, Islas Canarias.

El relieve natural de las islas volcánicas montañosas tiene profundos barrancos taludes rocosos de pronunciadas pendientes y elevados acantilados costeros. Las formaciones geológicas de origen volcánico incluyen materiales rocosos y suelos muy heterogéneos en cuanto a su disposición espacial y comportamiento geomecánico. Además, en las zonas del sur de Gran Canaria y Fuerteventura, con frecuencia las construcciones civiles y de edificación muestran altos taludes practicados en el terreno y, como resultado en diversos puntos se ven afectados por desprendimientos de rocas y deslizamientos En el presente trabajo se muestran dos casos de estudio: 1) Estudio del riesgo de desprendimientos de rocas y métodos de estabilización aplicados en el talud de Los Teques, T.M. de Mogán, sur de Gran Canaria, y 2) Estudio geológico-geotécnico para el proyecto de construcción del paseo peatonal en el acantilado costero de Morro Jable T.M. de Pájara, sur de Fuerteventura. La variación espacial de las formaciones volcamcas, su grado de soldadura y alteración variables y la dificultad de establecer familias de fracturas características, han hecho que los métodos clásicos de clasificación geomecanica resultaran poco eficaces. En estos casos, el reconocimiento geológico detallado y una estimación del comportamiento geomecánico de los materiales ha sido el método empleado para definir y evaluar las zonas inestables en los taludes y para establecer los métodos de estabilización más convenientes

Water seepage beneath dams on soluble evaporite deposits: a laboratory and field study (Caspe Dam, Spain)

The paper presents analytical methods and results for assessing the variation in the concentration of sulphate (and other ions) over space and time in groundwater flowing through a soluble evaporite terrain beneath a dam. The influence of effective porosity, groundwater flow velocity and the specific rate of dissolution (K′) are considered. The theoretical analysis was tested in a scale model simulating a dam constructed on heavily karstified bedrock. A simple and useful method for assessing how much material is lost through dissolution and how the rate of dissolution changes over time is considered in the context of the Caspe Dam, Spain

Two-step magnetization reversal FORC fingerprint of coupled bi-segmented Ni/Co magnetic nanowire arrays

First Order Reversal Curve (FORC) analysis has been established as an appropriate method to investigate the magnetic interactions among complex ferromagnetic nanostructures. In this work, the magnetization reversal mechanism of bi-segmented nanowires composed by long Co and Ni segments contacted at one side was investigated, as a model system to identify and understand the FORC fingerprint of a two-step magnetization reversal process. The resulting hysteresis loop of the bi-segmented nanowire array exhibits a completely different magnetic behavior than the one expected for the magnetization reversal process corresponding to each respective Co and Ni nanowire arrays, individually. Based on the FORC analysis, two possible magnetization reversal processes can be distinguished as a consequence of the ferromagnetic coupling at the interface between the Ni and Co segments. Depending on the relative difference between the magnetization switching fields of each segment, the softer magnetic phase induces the switching of the harder one through the injection and propagation of a magnetic domain wall when both switching fields are comparable. On the other hand, if the switching fields values differ enough, the antiparallel magnetic configuration of nanowires is also possible but energetically unfavorable, thus resulting in an unstable magnetic configuration. Making use of the different temperature dependence of the magnetic properties for each nanowire segment with different composition, one of the two types of magnetization reversal is favored, as demonstrated by FORC analyses

Pain expressions and inhibitory control in patients with fibromyalgia: behavioral and neural correlates

Fibromyalgia (FM) is a generalized chronic pain condition associated with a variety of symptoms, including altered cognitive and emotional processing. It has been proposed that FM patients show a preferential allocation of attention to information related to the symptoms of the disease, particularly to pain cues. However, the existing literature does not provide conclusive evidence on the presence of this attentional bias, and its effect on cognitive functions such as inhibitory control. To clarify this issue, we recorded the electroencephalographic activity of 31 women diagnosed with FM and 28 healthy women, while performing an emotional Go/NoGo task with micro-videos of pain, happy, and neutral facial expressions. We analyzed behavioral data, performed EEG time-frequency analyses, and obtained the event-related potentials (ERPs) N2 and P3 components in NoGo trials. A series of self-reports was also administered to evaluate catastrophic thinking and the main symptoms of fibromyalgia. Pain expressions were associated with longer reaction times and more errors, as well as with higher theta and delta power, and P3 amplitude to NoGo stimuli. Thus, behavioral and psychophysiological data suggest that increased attention to pain expressions impairs the performance of an inhibitory task, although this effect was similar in FM patients and healthy controls. N2 amplitude was modulated by type of facial expression (larger to pain faces), but only for the control group. This finding suggests that the presentation of pain faces might represent a smaller conflict for the patients, more used to encounter pain stimuli. No main group effects were found significant for N2 or P3 amplitudes, nor for time-frequency data. Using stimuli with greater ecological validity than in previous studies, we could not confirm a greater effect of attentional bias toward negative stimuli over inhibitory performance in patients with FM. Studying these effects allow us to better understand the mechanisms that maintain pain and develop intervention strategies to modify them.Galician Government (Consellería de Cultura, Educación e Ordenación Universitaria; axudas para a consolidación e estruturación de unidades de investigación competitivas do Sistema Universitario de Galicia [grant number GPC2014/047] and funding from the Spanish Government (Ministerio de Economía y Competitividad) [grant number PSI2013-45818-R]. AG-V was supported by a grant from the Deputación da Coruña (Bolsas de investigación en ciencias da saúde 2017) and Xunta de Galici

Optical characterization of ALD-coated nanoporous alumina structures: effect of sample geometry or coated layer material

This research was funded by the Spanish MCI under grant number PID2019-108075RB-C32/AEI/10.13039/501100011033

Improvement of high frequency giant magnetoimpedance effect in cofesib amorphous ribbon with vanishing magnetostriction by electrodeposited co coating surface layer

This work was supported by the Spanish MCIU, under PGC2018-099530-B-C31 (MCIU/AEI/FEDER, UE); the Spanish Ministerio de Ciencia e Innovacion (MICINN) and Research Agency State (AEI), under grant number PID2019-108075RB-C32 (...

Discordancia intra-Alcudiense en el anticlinal de Agudo (Ciudad Real-Badajoz)

The Proterozoic unconfomity, also known more to the East, is described in the Agudo Antic/ine at the base of the Upper Alcudian (Upper Vendian) and extended to the whole antic/inory. This allows the extension of the Intra-Alcudian unconformity to the W

Monocrystalline Heusler Co2FeSi alloy glass-coated microwires: Fabrication and magneto-structural characterization

The authors thank to Prof. A. Feher for the fruitful discussion. This work was supported by NanoCEXmat ITMS 26220120035, Slovak Grant Agency [grant number VEGA 1/0060/13], Slovak Grant Agency [grant number APVV-16-0079], and Slovak Grant Agency [grant number APVV-0027-11]. Spanish MINECO research projects [grant number MAT2013-48054-C2-2-R] and [grant number MAT2016-76824-C3-3-R], together with FICyT and Consejeria de Economia y Empleo from Principality of Asturias under project [grant number GIC-FC-15-GRUPIN14-085] are gratefully acknowledged. The technical assistance provided by the Scientific-Technical Services (SCTs) of the University of Oviedo is also recognized

Chemical, optical and transport characterization of ALD modified nanoporous alumina based structures

This work has been financial supported partially under MINECO Research Project Nº. MAT2016-76824-C3-3-R and ISCIII Project Nº. FISS-19-DTS19/00088