Search results for " REE"
showing 10 items of 167 documents
LA DIMENSIONE FRATTALE DEI REEF A VERMETI
2012
Fractal geometry can be an useful tool to describe the structural complexity of a vermetid reef. Using fractal analysis of small surfaces, the fractal dimension for the outer rim of some vermetid reefs can be established. A positive correlation between fractal values and the density of Dendropoma petraeum is evident.
DISTRIBUTION AND CONSERVATION NEEDS OF A NEGLECTED ECOSYSTEM: THE MEDITERRANEAN VERMETID REEF
2014
Vermetid reefs are a key intertidal habitat in the Mediterranean. Despite recent evidence of local extinction in the Eastern Mediterranean, their role as habitat engineers and the high numbers of ecosystem services they provide, vermetid reefs are among the least known marine habitats of the Mediterranean. Here we present a literature-based study to assess for the first time their distribution inside the basin and provide evidence of a general lack of protection at Mediterranean scale.
Triassic/Jurassic carbonates from Western Sicily: their facies and implications for the end-Triassic biotic crisis.
2008
Carbonate platform-basin systems in Sicily around the Triassic/Jurassic boundary: new data from the Campofiorito area (Sicani Mountains, western Sici…
2006
New-stage discharge relationships for free and submerged sluice gates
2012
Abstract The flow movement through a sluice gate is investigated for both free and submerged flow conditions. For free flow condition, the current dimensionless formula, indicated acceptable accuracy; while for submerged flow condition it was modified especially for low submerged condition. In this regard, Buckingham theorem along with the Incomplete Self-Similarity concept was employed and a new stage–discharge relationship was developed accordingly. Also, to achieve a suitable formula for submerged flow condition being accurate in low submergence, the maximum tailwater depth allowing the free flow condition and head loss factor were identified as missing parameters in the functional dimen…
A rare case report of variable degrees of atrioventricular block during atrioventricular nodal reentrant tachycardia
2020
Influence of artificial reefs on the surrounding infauna: Analysis of meiofauna
2002
We adopted a bottom-up approach in studying the effect of two artificial reefs in contrasting environmental conditions (sandy-mud and meso-eutrophic in the Adriatic Sea versus coarse sands and oligotrophic in the Tyrrhenian Sea) on the surrounding environment by assessing changes in the meiofauna. The spatial distribution of meiofaunal assemblages was established along a transect running from within each reef to well outside its direct sphere of influence, along with information on the trophic conditions of sediments (chloropigments, proteins, carbohydrates and total organic matter). Although total densities were significantly higher in the Adriatic than in the Tyrrhenian, the meiofauna dis…
La posició dels clítics i de les marques de negació pressuposicional en els contextos de reestructuració
2021
En aquest article presentem l'estudi de la variació microsintàctica en els parlars catalans com a estratègia per a una comprensió millor i més aprofundida dels contextos de reestructuració i de les dependències a llarga distància. Proposem que la reestructuració implica l'existència d'una estructura biclausal amb un domini subordinat defectiu. Aportem proves a favor d'aquesta anàlisi tot explorant les posicions dels clítics i de les marques de negació pressuposicional en contextos de reestructuració en les varietats del català. D'una banda, les dades recollides demostren que, tot i que l'ascens del clític i l'ús de les marques pressuposicionals al domini subordinat són fenòmens independents…
Las criadas de Penélope. Escribir la violencia
2007
Partiendo de las reflexiones sobre la violencia de Walter Benjamin, Simone Weil y Hannah Arendt, en este artículo se analiza la reescritura que realizan Wislawa Szymborska, Sophia de Mello, Claribel Alegría, Margaret Atwood y María Zambrano de una serie de figuras míticas que sufrieron la violencia: la mujer de Lot, Eurídice, las criadas de Penélope y Antígona.
Los precios en los mercados reestructurados de electricidad: algunas lecciones básicas para la negociación derivada
2005
Este artículo investiga los precios al contado de mercados reestructurados de la electricidad de diversas partes del mundo. Primero se proporciona un análisis detallado de las propiedades distributivas y de la dinámica de los precios de contado eléctricos. Después se realiza una introducción a los múltiples factores por el lado de la demanda y de la oferta que contribuyen a su complejo y variado comportamiento. Finalmente se extraen algunas lecciones fundamentales del análisis anterior para la negociación de derivados sobre la electricidad. This paper investigates the spot prices from restructured electricity markets around the world. First, we provide a comprehensive survey of the distribu…