Le borgate di Palermo

Lo scritto si riferisce a un lavoro svolto sulle borgate palermitane a partire dall'applicazione dell'analisi morfologica, sulla scorta dell'esperienza del Piano Programma sul centro storico

I quartieri ad Algeri e a Parigi di Fernand Pouillon architetto mediterraneo

L'articolo tratta dei quartieri negli anni '50 ad Algeri e a Parigi di Fernand Pouillon: un architetto ignorato dalla critica per molto tempo in quanto fuori dal clich\ue9 della modernit\ue0, avendo costruito molto con uso della pietra, composizione simmetrica, ricerca della monumentalit\ue0. Pu\uf2 essere riconosciuto come emblematico rappresentante della mediterraneit\ue0

La nuova edizione del libro di Cesare Brandi "Disegno dell'architettura italiana"

L'articolo \ue8 una lettura del libro di Brandi che si riferisce principalmente al ruolo dello spazio e al rapporto tra spazio interno ed esterno, con una riflessione finale sull'architettura italiana contemporane

Calorimetric Study Of Intercalation Of N-alkyldiamines Into α-titanium Hydrogenphosphate

A series of n-alkyldiamines of general formula H2N(CH2)nNH2 (n = 2-9) has been intercalated into the crystalline lamellar compound α-Ti(HPO4)2·H2O (TiP) from aqueous solution. The amount intercalated was followed batchwise at 298 ± 1 K and the variation of the original interlayer distance for TiP (756 pm) was followed by X-ray powder diffraction. Linear correlations with good fits were obtained for the interlamellar distance (d) or for the number of moles intercalated (nint) as a function of the number of carbon atoms in the aliphatic chain (nc): d =(883.14 ± 12.76) + (108.51 ± 2.20)nc and nint =(5.79 ± 0.12) - (0.28 ± 0.02)nc. The exothermic enthalpies for the intercalation are related to the monomolecular layer arrangement with a longitudinal axis inclined by 58° to the inorganic sheets. The enthalpies for the overall reaction 2O3P-OH(c) + H2N(CH2)nNH2(c, l) = O3P - O-+H3N(CH2)nNH3+-O - PO3(c); ΔintH, determined by reaction-solution calorimetry at 298.15 ± 0.02 K are correlated with the number of carbons in the aliphatic chain or the interlamellar distance, by the equations Δint H= -(56.16 ± 0.67)-(2.06 ± 0.12)nC and ΔintH = -(39.41 ± 1.41)-(1.80 × 10-2 ± 0.10 × 10-2)d. The enthalpic value for nc = 0 gave -56.17 ± 0.67 kJ mol-1 which corresponds to the intercalation of two moles of ammonium cation.61219631966Alberti, G., Galli, P.C., Costantino, U., Torracca, E., (1967) J. Inorg. Nucl. Chem., 29, p. 571Clearfield, A., (1982) Inorganic Ion Exchange Materials, , CRC Press, Boca Raton, FLSuárez, M., Garcia, J.R., Rodriguez, J., (1984) J. Phys. Chem., 88, p. 159Alberti, G., Casciola, M., Costantino, U., (1985) J. Colloid Interface Sci., 107, p. 25

La piazza "mediterranea" nei borghi rurali in Sicilia

L'articolo tratta dei borghi rurali costruiti in Sicilia alla fine degli anni '30 e subito dopo la guerra, e del ruolo della piazza in quanto carattere di mediterraneit\ue0 dei compless

La ricerca sui centri storici. Giuseppe Samonà e il Piano Programma per Palermo

Il volume tratta di vari aspetti del Piano Programma, ancora attuali a 30 anni di distanza e malgrado la mancanza di attuazione

Bayesian stochastic blockmodeling

This chapter provides a self-contained introduction to the use of Bayesian inference to extract large-scale modular structures from network data, based on the stochastic blockmodel (SBM), as well as its degree-corrected and overlapping generalizations. We focus on nonparametric formulations that allow their inference in a manner that prevents overfitting, and enables model selection. We discuss aspects of the choice of priors, in particular how to avoid underfitting via increased Bayesian hierarchies, and we contrast the task of sampling network partitions from the posterior distribution with finding the single point estimate that maximizes it, while describing efficient algorithms to perform either one. We also show how inferring the SBM can be used to predict missing and spurious links, and shed light on the fundamental limitations of the detectability of modular structures in networks.Comment: 44 pages, 16 figures. Code is freely available as part of graph-tool at https://graph-tool.skewed.de . See also the HOWTO at https://graph-tool.skewed.de/static/doc/demos/inference/inference.htm

New inorganic-organic lamellar derivatives synthesized from H-RUB-18 and thermodynamics of cation sorption

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)A synthesized crystalline lamellar sodium RUB-18 was reacted with hydrochloric acid solution to exchange the original hydrated sodium cation on the interlayer space to obtain the acidic form, H-RUB-18, whose silanol groups on the surface favour covalent bond formation with the silylating agents 3-aminopropyltriethoxysilane (N) and N-3-trimethoxysilylpropyldiethylenetriamine (3N). Both new organofunctionalized nanostructured materials were characterized by means of elemental analysis, IR spectroscopy, X-ray diffraction patterns, NMR, thermogravimetry and scanning electron microscopy. The determined maximum amount of coupling reagents incorporated were 2.28 and 1.03 mmol g(-1), for RUB-N and RUB-3N, respectively. The H-RUB-18 basal distance of 0.75 nm expands to 0.94 and 1.10 nm in two successive steps of reaction. Covalent bond formation between the organosilyl groups and the inorganic layered backbone was confirmed by (13)C and (29)Si NMR, as evidenced by carbon chemical shifts of the pendant organic chains and by the Q(3) and Q(4) sites, in addition to T(2) and T(3) species, that correspond to carbon-silicon bond formation from the pendant coupling reagents covalently attached to the H-RUB-18 structure. These two new synthesized materials have the ability to extract divalent cations from aqueous solution, using a batchwise process. The same interaction was also followed through calorimetric titration and the thermodynamic data, with high entropic contributions, indicated favourable cation/basic centre interactions at the solid/liquid interface.331020812089Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq