322,983 research outputs found
Geomorfologia dell' area di Pianura Padana compresa fra Cento, Finale Emilia e S. Agostino
No full textIl lavoro illustra le caratteristiche altimetriche, granulometriche supeficiali e geomorfologiche dell'area di Pianura Padana tra Cento, Finale Emilia e Sant'Agostino
Epidermal growth factor receptor (EGFR) targeted therapies in non-small cell lung cancer (NSCLC).
No full textMetro G, Finocchiaro G, Toschi L, Bartolini S, Magrini E, Cancellieri A, Trisolini R, Castaldini L, Tallini G, Crino' L, Cappuzzo F. Epidermal growth factor receptor (EGFR) targeted therapies in non-small cell lung cancer (NSCLC). Reviews on recent clinical trials. 2006;1:1-13
Commento a: Federici P.R., Ginesu S. & Oggiano G. (1987) - Genesi ed evoluzione della pianura costiera turritana (Sardegna settentrionale).Geografia Fisica e Dinamica Quaternaria, 10, 133-121
No full textSi tratta del commento scientifico al lavoro di Federici et al. (1987) che aveva l'obiettivo di ricostruire la genesi della pianura costiera turritana e le sue relazioni con la Tettonica recente attraverso ricerche geologiche e geomorfologiche di dettaglio che hanno condotto anche all'elaborazione di una Carta Geologica e di Carta geomorfologica a colori a scala 1: 25.000. L’area di studio, che costituisce il naturale sbocco al mare della città di Sassari e che con il suo vasto arenile offriva notevoli possibilità di sviluppo turistico è assai interessante sia da punto di vista antropico che naturalistico. La pianura costiera turritana è stata geologicamente definita come una bassa terra di origine di origine primaria successivamente cresciuta per aggradazione di sedimenti eolici. Nella Carta Geomorfologica, per forme, depositi e processsi vengono fornite indicazioni morfogenetiche, morfodinamiche , morfocronologiche e morfometriche, secondo i comuni criteri della cartografia geomorfologica italiana. La carta riporta anche la ricostruzione della morfologia del fondale marino. Il lavoro in esame ha portato ad un notevole e significativo progresso nelle conoscenze della pianura costiera turritana
Electronic transitions at defect states in Cz p-type silicon
No full textPoint and extended defects introduced in p-type Cz Si by oxygen precipitation and plastic
deformation have been investigated with electrical and optical methods. Different materials soxygen
precipitated and/or deformed Cz Si and Fz Sid were examined in order to separate the role of oxygen
precipitation, plastic deformation, and metallic contamination on the radiative and nonradiative
electronic transitions at defect centers. A deep hole trap, named T1, has been associated with
dislocation-related impurity centers; additional deep traps have been related to contamination by
grown-in transition metals and to clusters involving oxygen atoms
Dati preliminari sulla neotettonica dei Fogli 11 (M.Marmolada) e 97 (S. Marcello Pistaiese).
No full textCharge collection mapping of the back-transfer process in Er-doped silicon
No full textCharge collection analyses have been carried out on Er-doped silicon to investigate the excitation and de-excitation mechanisms of the Er3+ ion related to the λ = 1.54 μm luminescence. Carrier recombination and trapping at the defective states induced in the material by the presence of Er play a significant role in the excitation of the Er3+ ion and in its nonradiative decay by the energy back-transfer process. We have obtained a two-dimensional map of the lattice sites where the back-transfer process occurs, and provided experimental proof of the cooperation of two different defects in the excitation and de-excitation processes. © 2000 American Institute of Physics
Study of the geomorphological and archaeological aspects of Sintra area (Portugal) as contribution to its tourist appraisal and promotion
No full textThe Portughese town of Sintra is an UNESCO world heritage site for itscultural and environmental aspects. The town is located 30 km from Lisbon and 15km from the Atlantic Ocean, and is a touristic site in every seasons mainly for itsarchitectural qualities. This work describes the geomorphological and archaeologicalaspects of the town and the surrounding Serra de Sintra in order to give an addedvalue to tourist appraisal and promotion of the area. Serra de Sintra is an ellipticigneous massif 10 km E-W and 5 km N-S, 300-500 m above sea level. The geologicalstructure is complex but it can be simplified as a core of sienites surrounded bygranites intruded in a limestone plateau. The morphogenetic processes, besidecommon landforms such as narrow valleys, scarps and ridges, shaped a variety ofparticular granite morphologies such as round block fields, inselbergs, castle koppies,etc.... The most spectacular ones have been described and classified as geosites in adata-base. The oldest archaeological remains dates to the Mesolithic, but the area hasbeen extensively occupied during the Neolitic/Calcolithic, Bronze and Iron Ages. Inhistorical times Romans, Visigots and Arabs left some interesting architectural andlinguistic marks. All the archaeological sites have been classified according tobibliographic, museal data and field surveys. They are also all included in a data-base.GeoArchaeo-Tourist maps at 1:25,000 and 1.10,000 scales of the Serra de Sintra andSintra town are the information results collected in the geomorphological andcultural data-bases. The maps have been implemented, by means of an ArcGIScomputer programme, integrating geological, geomorphological, archaeological andhistorical aspects with the tourist infrastructures (information points, parking areas,accommodations, panoramic points, etc.) in order to obtain documents readable, simple, clear but scientifically accurate also for non-expert users. This study could besuitably simplified and summarized in a guide book, with enclosed GeoArchaeo-Tourist maps, as a contribution to improve the knowledge and appraisal of the Sintraterritory also for its landscape and archaeological aspects
Defect states in Czochalski p-type silicon: the role of oxygen and dislocations
No full textThis contribution reports the study, by junction spectroscopies, of electronic states induced by thermal and deformation treatments in p-type Si. In order to understand the role that oxygen precipitation, metallic contamination and plastic deformation play on the defect states, several sets of Cz (Czochalski) and Fz (Float-zone) Si samples and different material treatments were investigated. The electronic states were also compared with optical transitions obtained by photoluminescence analyses carried out on the same
sample sets. These defect states could thus be microscopically identified with specific defect types
L’evoluzione morfologica e il modellamento del Fiume Panaro e dei suoi affluenti
No full textIl paragrafo illustra le caratteristiche e le peculiarità geomorfologiche ed idrografiche del bacino del Fiume Panaro (Provincia di Modena), sulla base dell'evoluzione morfologica e del modellamento fisico avvenuti nel corso del Quaternario
Geomorfologia del territorio delle valli e dei dossi
No full textIl capitolo illustra la geomorfologia del territorio della bassa pianura modenese attraverso la descrizione delle modalità di formazione della bassa pianura, l'evoluzione paleoidrografica della pianura modenese e le caratteristiche geomorfologiche dell'area di studio (depositi superficiali, assetto altimetrico, forme del paesaggio, punti di interesse geomorfologico
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