13,662 research outputs found
Perché !!! : valse chantée : [piano] / par le comte G. Castelli
No full textTitre uniforme : Castelli, G. (18..-18.. ; compositeur). Compositeur. [Perché !!!. Piano]Valses (piano) -- +* 1800......- 1899......+:19e siècle:Piano, Musique de -- +* 1800......- 1899......+:19e siècle:Romances (musique vocale) -- +* 1800......- 1899......+:19e siècle
La rete dei castelli
No full textIl territorio della Provincia di Siena presenta un patrimonio archeologico e architettonico eccezionale. Fra le diverse categorie che articolano questo patrimonio c'è la maglia dei castelli che costituisce in se una ricchezza da promuovere e valorizzare ma sopratutto uno fra gli elementi distintivi più importanti del paesaggio rurale di questa regione. Infatti i villaggi fortificati non rappresentano dei ruderi o mere emergenze architettoniche, ma sopratutto il tessuto vivo che ancora oggi regola e determina parte della formazione e strutturazione del paesaggio culturale. Il presente saggio tenta di fare una resoconto generale sui numeri di questa immensa eredita. Nel farlo si tenta di compiere anche una sintesi relativa alla sua distribuzione spaziale e sull'impatto che il numero ed il peso di questo patrimonio hanno nelle diverse zone della provincia di Siena.The Province of Siena has an exceptional archaeological and architectural heritage. Among the various categories that articulate this heritage is the network of castles which is not only a resource to promote, but above all one of the most important distinguishing features of the rural landscape of this central Italy. In fact, the fortified villages do not represent mere ruins or architectural monuments, but mostly the living pattern that still regulates and determines the formation and structuring of the cultural landscape. This paper attempts to make a general overview on the numbers of this immense heritage. In this effort an account was made on the spatial distribution and the impact of the distribution of this heritage in the different areas of the province of Siena
Positronium confined in nanocavities: The role of electron exchange correlations
Full text linkPositronium atoms (Ps) are commonly employed as a probe to characterize nanometric or subnanometric voids or vacancies in nonmetallic materials, where Ps can end up confined. The annihilation lifetime of a trapped Ps is strongly modified by pickoff and depends on the cavity size and on the electron density in the confining cavity surface. Here, we develop a theory of the Ps annihilation in nanocavities based on the fundamental role of the exchange correlations between the Ps-electron and the outer electrons, which are not usually considered but must be considered to correctly theorize the pickoff annihilation processes. We obtain an important relation connecting the two relevant annihilation rates (for the p-Ps and the o-Ps ) with the electron density, which has the property of being totally independent of the geometrical characteristics of the nanoporous medium. This general relation can be used to gather information on the electron density and on the average cavity radius of the confining medium, starting from the experimental data on PALS annihilation spectra. Moreover, by analyzing our results, we also highlight that a reliable interpretation of the PALS spectra can only be obtained if the rule of 1/3 between the intensities of p-Ps and o-Ps lifetimes can be fulfilled
THz SPECTROSCOPY OF THE STATE OF OO and O
No full textAuthor Institution: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109; I. Physikalisches Institut, Universitat zu Koln, Zulpicher Str. 77, Koln, GermanySubmillimeter-wave rotational spectra of OO and O in the state have been detected in a new static discharge cell useful for studying rare isotopologues of transient molecules. Rotational transition frequencies of both species have been measured through 1.6 THz, to better than 1 part in , allowing precise determination of molecular constants. The first measurements with our static discharge cell provide a check on the isotopic predictions in the state
Disegno e Linguaggio. Ipotesi-confronto fra espressività grafico-pittorica ed espressività verbale in bambini di diverso ambiente sociale
No full textcon prefazioni di A. Quadrio e di G. Acone.
ad Annamaria de Rosa : 21- 166; 241-271.
ad entrambe le autrici: 13-18; 167-19
Glycyrrhizin and 18 beta-glycyrrhetinic acid: a comparative study of the pharmacological effects induced in the rat after prolonged oral treatment.
No full textRecent clinical and toxicological studies have investigated the mineralcorticoid-like and hypertensive effects of liquorice, and we therefore set out to identify the active component responsible for these effects. We conducted a 30-day comparative analysis of glycyrrhizin and 18 beta-glycyrrhetinic acid and found that the latter causes significant variations both in systolic blood pressure and in the excretion in the urine of Ca++. The effects were fully reversible on suspension of treatment
Structural changes of synthetic paulingite (Na,H-ECR-18) upon dehydration and CO2 adsorption
Full text linkFunding: EPSRCThe structure of dehydrated calcined ECR-18, synthetic paulingite, topology type PAU, unit cell composition Na132H28Si512Al160O1344, has been determined by Rietveld refinement against synchrotron X-ray powder diffraction data. Upon dehydration the symmetry of Na,H-ECR-18 changes from Im3m to I 43m, with a corresponding decrease of cubic unit cell a parameter from 34.89412(1) A to 33.3488(3) A. This occurs as the framework distorts to afford closer coordination of Na+ cations by framework O atoms in 8-ring window sites of the seven cage types present. Na+ cations in 8R sites block the access of N2 molecules to the internal pore space at 77 K but CO2 adsorption at 308 K is observed, and is postulated to occur via a 'trapdoor' mechanism. In situ PXRD during CO2 adsorption at pressures up to 10 bar show reversible broadening of diffraction peaks that is attributed to local crystallographic strain.Peer reviewe
US Army Centrifuge: Progressive collapse testing of a 4-story reinforced concrete structure at 1/18-Scale
No full textA 1/18-scale model of a 4-story reinforced concrete structure was tested at 18 g in the US Army Centrifuge to support the development of computational modeling of progressive collapse of multi-story buildings. The model structure was 4 bays long and 3 bays wide with column spacing about 33 cm in each directions and story height of 20.3 cm. Three columns around one corner at the 1st story were explosively removed while the model was spinning in the centrifuge at 18 g. The column removal resulted in complete collapse the bays above those columns but collapse did not progress to the rest of the structure
Malaria
No full textVengono descritte le caratteristiche epidemiologiche, cliniche e terapeutiche della infezione malarica in area di endemi
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