Disseny de miniunitats didàctiques de l'àrea de llengües estrangeres : anglès. 'Diseño de miniunidades didácticas del área de lenguas extranjeras : inglés'.

Resumen basado en el de la autora en catalán. No consta el centro realizador

Language learning and MUDs : an overview. 'Aprendizaje de idiomas y MUDs : una visión general'.

La traducción literal de MUD es Mazmorra o Calabozo multiusuario o Dimensión multiusuario. Un MUD es un juego de rol en línea que es ejecutado en un servidor. El artículo incluye direcciones de varios MUDs

La arquitectura g??tica en tiempos de Isabel la Cat??lica

N??mero monogr??fico sobre Isabel la Cat??lica y su tiempo

Los Volcanes: un enfoque sistémico de un tema clásico

Si consideramos nuestro planeta como un conjunto de subsistemas interdependientes las relaciones que se establecen entre todos sus elementos definen un sistema complejo donde cualquiera de sus partes puede influir en la evolución del resto. En este escenario de interconexiones los volcanes asumen un papel muy importante

Dos nous afloraments volcànics a l'Alt Empordà (Girona)

Two unknown volcanic outcrops in the Alt Emporda (Girona) are described in this paper . We present their exact situation and a description of their occurrence and their mineralogical and petrological characteristics. Bothhave been classified as alkali-olivine basalts and they probably extruded during the Neogen period

Un nou volcà a la vall d'Hostoles

Descripció del volcà anomenat 'Palou' a 1Km. al Sud d' Amer

El campo volcánico catalán

Catalan volcanic field, in Iberian Peninsula Northeast, has been made during Neogene and Quaternary. It is made up Empordà, la Selva and la Garrotxa Zones, the best volcanic morphology is in the last one because is the most recent. In this paper we explain the volcanic rocks general characteristics, what eruption activity generate it and the final volcanic edifice morphology. Finally, we propose some crops to visit

L'aflorament volcànic del mas Ventós (el Port de la Selva, Alt Empordà)

Es descriu un aflorament volcànic localitzat a la rodalia del mas Ventós (el Port de la Selva), a la part central de la serra de Rodes, dins el Pirineu axial. Es tracta d’una xemeneia volcànica enclavada en granodiorites gneissificades. Els materials que la componen són basalts olivínics alcalins amb textura traquítica, bastant alterats, els quals queden colgats per un dipòsit col·luvial sense consolidar. Les dimensions de la xemeneia són difícils de determinar pel recobriment que presenta: supera els 70 m en direcció nord-nord-est a sud-sud-oest i és d’uns 35 m en la perpendicular a aquesta. Aquest aflorament va ser citat per Teixidor fa més d’ un segle, i no s’ha retrobat fins ara

Aportacions al coneixement del vulcanisme neogen de l'Alt Empordà: tres afloraments volcànics inèdits al terme municipal de Roses

En aquest treball es descriuen les característiques litològiques principals de tres afloraments volcànics inèdits que han estat localitzats al terme municipal de Roses. Es tracta de materials basàltics, similars als que s'associen a altres manifestacions efusives neògenes de la comarca de l'Alt Empordà

Els afloraments volcànics a les comarques gironines

Es descriuen els afloraments volcànics de les comarques gironines, que segons la seva edat es poden subdividir en: manifestacions eruptives paleozoiques i afloraments relacionats amb el vulcanisme de l'era cenozoica

Selenium cycling in volcanic environments: the role of soils as reactive interfaces

Selenium (Se) is an element with important health implications that is emitted in significant amounts from volcanoes. Attracted by the fertility of volcanic soils, around 10% of the world population lives within 100 km of an active volcano. Nevertheless, the behaviour of Se in volcanic environments is poorly understood. Therefore, the main aim of this thesis is to investigate the role of soils in the Se cycling in volcanic environments. Prior to the geochemical studies, precise and accurate methods for the determination of Se contents, speciation and isotopic signatures were developed. Afterwards, a combination of field studies and lab controlled experiments were performed with soils from two contrasting European volcanic settings: Mount Etna in Sicily (Italy) and Mount Teide in Tenerife (Spain). The results showed a strong link between Se behaviour and soil development, indicating that Se mobility in volcanic soils is controlled by sorption processes and soil mineralogy.

Naturaleza, paisaje y memoria: alturas y ciudades del Reino de Qutio en la experiencia viajera del siglo XVIII (Estudios)

A mediados del siglo XVIII las alturas de los Andes del Reino de Quito, al igual que sus centros urbanos, fueron visitadas por viajeros naturalistas y misioneros. Este artículo explora cómo algunos de esos viajeros percibieron, construyeron y recordaron desde dos puntos de vista distintos la naturaleza y el paisaje. Tras exponer las categorías y enfoques empleados, el artículo explora dos tipos de percepción y memoria de la naturaleza: el sobrenatural y el naturalista. Finalmente, se analiza el paisaje urbano en cuya construcción escrita se combinaron las antiguas ideas del orden colonial con la perspectiva de la prosperidad terrenal, correlato del interés por las ciencias aplicadas que animaba la exploración de las alturas nevadas y de los volcanes.

The sediment trapping efficiency of the macro-tidal Daly Estuary, tropical Australia

Field studies were carried out on the water and sediment dynamics in the tropical, macro-tidal, Daly Estuary. The estuary is shallow, very-turbid, about 100 km long, and the entrance is funnel-shape. In the wet, high flow season, normal tidal ranges can be suppressed in the estuary, depending on inflow rates, and freshwater becomes dominant up to the mouth. At that time a fraction of the fine sediment load is exported offshore as a bottom-tagging nepheloid layer after the sediment falls out of suspension of the thin, near-surface, river plume. The remaining fraction and the riverine coarse sediment form a large sediment bar 10 km long, up to 6 m in height and extending across the whole width of the channel near the mouth. This bar, as well as shoals in the estuary, partially pond the mid- to upper-estuary. This bar builds up from the deposition of riverine sediment during a wet season with high runoff and can raise mean water level by up to 2 m in the upper estuary in the low flow season. This ponding effect takes about three successive dry years to disappear by the sediment forming the bar being redistributed all over the estuary by tidal pumping of fine and coarse sediment in the dry season, which is the low flow season. The swift reversal of the tidal currents from ebb to flood results in macro-turbulence that lasts about 20 min. Bed load transport is preferentially landward and occurs only for water currents greater than 0.6 m s(-1). This high value of the threshold velocity suggests that the sand may be cemented by the mud. The Daly Estuary thus is a leaky sediment trap with an efficiency varying both seasonally and inter-annually. (c) 2006 Elsevier Ltd. All rights reserved.

Insights into processes and deposits of hazardous vulcanian explosions at Soufrière Hills Volcano during 2008 and 2009 (Montserrat, West Indies)

During the Soufrière Hills eruption, vulcanian explosions have generally occurred 1) in episodic cycles; 2) isolated during pauses in extrusion, and 3) after major collapses of the dome. In a different eruptive context, significant vulcanian explosions occurred on 29 July 2008, 3 December 2008, and 3 January 2009. Deposits are pumiceous except for the 3 December event. We reconstructed the dispersal pattern of the deposits and their textural characteristics to evaluate erupted volume and vesicularity of the magma at fragmentation. We discuss the implications of these explosions in terms of eruptive processes and chronology, and the hazards posed by their sudden and often unheralded occurrence. We suggest that overpressurization of the conduit can develop over time-scales of months to weeks by a process of self-sealing of conduit walls and/or the cooling dome by silica polymorphs. This work provides new insights for understanding the generation of hazardous vulcanian explosions at andesitic volcanoes.

Time series analysis of lava flux

We have applied time series analytical techniques to the flux of lava from an extrusive eruption. Tilt data acting as a proxy for flux are used in a case study of the May–August 1997 period of the eruption at Soufrière Hills Volcano, Montserrat. We justify the use of such a proxy by simple calibratory arguments. Three techniques of time series analysis are employed: spectral, spectrogram and wavelet methods. In addition to the well-known ~9-hour periodicity shown by these data, a previously unknown periodic flux variability is revealed by the wavelet analysis as a 3-day cycle of frequency modulation during June–July 1997, though the physical mechanism responsible is not clear. Such time series analysis has potential for other lava flux proxies at other types of volcanoes.