Search results for "tiles"

Cutaneous Recording and Stimulation of Muscles Using Organic Electronic Textiles

2016

International audience; Electronic textiles are an emerging field providing novel and non-intrusive solutions for healthcare. Conducting polymer-coated textiles enable a new generation of fully organic surface electrodes for electrophysiological evaluations. Textile electrodes are able to assess high quality muscular monitoring and to perform transcutaneous electrical stimulation.

Allometries of maximum growth rate versus body mass at maximum growth indicate that non-avian dinosaurs had growth rates typical of fast growing ecto…

2014

We tested if growth rates of recent taxa are unequivocally separated between endotherms and ectotherms, and compared these to dinosaurian growth rates. We therefore performed linear regression analyses on the log-transformed maximum growth rate against log-transformed body mass at maximum growth for extant altricial birds, precocial birds, eutherians, marsupials, reptiles, fishes and dinosaurs. Regression models of precocial birds (and fishes) strongly differed from Case's study (1978), which is often used to compare dinosaurian growth rates to those of extant vertebrates. For all taxonomic groups, the slope of 0.75 expected from the Metabolic Theory of Ecology was statistically supported. …

Revista electrónica de investigación y evaluación educativa

2006

The investigation results are presented: "An investigation or research about the most relevant variables from the student’s point of view which influence the general opinion about the teacher’s performance in the Universidad Autonoma de Occidente". The problems about the influence from the students perception in evaluating their teachers is taken on from two complementary perspectives: The first constitutes the qualitative analysis which has as a support the group interviews realized in each one of the academic programs. The second involves the quantitative analysis based on multivariate statistic tools. These perspectives allow elaborating a model to establish the grade of relevance each o…

Fetid odors in Caralluma europaea (Guss.) N.E.Br. (Apocynaceae-Asclepiadoideae): a chemical characterization

2008

Constrains on mantle, slab and crustal contributions to major volatiles and noble gases along the Andean Volcanic Belt

2020

Fornaci e produzioni del Golfo di Castellamare (Sicilia nord-occidentale)

2020

L’area del Golfo di Castellammare (Sicilia occidentale) è nota per le numerose fornaci di età romana. In questo articolo, si cercherà di ricostruire l’attività di un’officina destinata principalmente alla produzione di laterizi con bollo ΟΝΑΣΟΥ, databile fra III e I secolo a.C. Ricerche precedenti hanno permesso di riconoscere nel produttore di questi laterizi lo stesso Onasus Segestanus citato nelle Verrine di Cicerone e di localizzarne una possibile officina presso la Baia di San Cataldo. La scoperta di nuovi laterizi bollati e di scarti ceramici assume notevole importanza per una ricerca sugli ateliers ceramici del Golfo di Castellammare e della Piana di Partinico. Ne deriva un quadro ag…

Leachate analyses of volcanic ashes from Stromboli volcano: A proxy for the volcanic gas plume composition?

2011

[1] Many volcanoes show a change in chemical composition of the gas phase prior to periods of eruptive activity. Fine-grained tephra erupted from active vents and transported through volcanic plumes can adsorb, and therefore rapidly scavenge, volatile elements such as sulfur, halogens, and metal species in the form of soluble salts adhering to ash surfaces. Analysis of such water-soluble surface materials is a suitable supplement for remote monitoring of volcanic gases at inaccessible volcanoes. In this work, ash samples of the 2004 to 2009 eruptive activity of Stromboli volcano were sampled, leached, and analyzed for major and trace elements. Data analysis and interpretation was focused on…

Mobility and fluxes of major, minor and trace metals during basalt weathering and groundwater transport at Mt. Etna volcano (Sicily)

2000

Abstract The concentrations and fluxes of major, minor and trace metals were determined in 53 samples of groundwaters from around Mt Etna, in order to evaluate the conditions and extent of alkali basalt weathering by waters enriched in magma-derived CO 2 and the contribution of aqueous transport to the overall metal discharge of the volcano. We show that gaseous input of magmatic volatile metals into the Etnean aquifer is small or negligible, being limited by cooling of the rising fluids. Basalt leaching by weakly acidic, CO 2 -charged water is the overwhelming source of metals and appears to be more extensive in two sectors of the S-SW (Paterno) and E (Zafferana) volcano flanks, where out …

S, Cl and F degassing as an indicator of volcanic dynamics: The 2001 eruption of Mount Etna

2002

[1] The recent eruption of Mount Etna (July 2001) offered the opportunity to analyze magma-derived volatiles emitted during pre- and syn-eruptive phases, and to verify whether their composition is affected by changes in volcanic dynamics. This paper presents the results of analyses of F, Cl and S in the volcanic plume collected by filter-packs, and interprets variations in the composition based on contrasting solubility in magmas. A Rayleigh-type degassing mechanism was used to fit the acquired data and to estimate Henry's solubility constant ratios in Etnean basalt. This model provided insights into the dynamics of the volcano. Abundances of sulfur and halogens in eruptive plumes may help …

Atmospheric sources and sinks of volcanogenic elements in a basaltic volcano (Etna, Italy)

2011

Abstract This study reports on the first quantitative assessment of the geochemical cycling of volcanogenic elements, from their atmospheric release to their deposition back to the ground. Etna’s emissions and atmospheric depositions were characterised for more than 2 years, providing data on major and trace element abundance in both volcanic aerosols and bulk depositions. Volcanic aerosols were collected from 2004 to 2007, at the summit vents by conventional filtration techniques. Precipitation was collected, from 2006 to 2007, in five rain gauges, at various altitudes around the summit craters. Analytical results for volcanic aerosols showed that the dominant anions were S, Cl, and F, and…