Search results for "Structural analysi"
showing 8 items of 38 documents
Premessa al volume: Il cubicolo X13 nella catacomba di Villagrazia di Carini. Indagini preliminari e interventi di consolidamento 2016-2019
2019
This book is dedicated to the archaeological excavations and to the consolidation of the structures of cubicle X13 in the catacomb of Villagrazia di Carini (PA). In 2015 the interesting funerary chamber was seriously damaged by the collapse of the ceiling; from 2016 to 2019, the realization of the recovery and restoration project by the Pontificia Commissione di Archeologia Sacra has been the occasion for the study of the rock-cut architectures and of the structural characteristics of the cubicle, one of the most remarkable private funerary spaces in the Early Christian and byzantine cemetery of Carini.
L’analisi strutturale e le fasi
2019
The X13-X13.1 is one of the most considerable cubicles in the catacomb. It consists of a quadrangular funerary chamber preceded by a short dromos placed along the gallery X. The tombs are several and of different types: arcosolia for adults and children, lithic sarcophagi, pavimental graves ("formae"), and very interesting areas for ritual "refrigerium" The archaeological investigations and the structural date indicate that the duplex cubicle is the result of different phases of development, and that it was used by a numerous and wealthy family group for several generations, by the end of the fourth/beginning of the fifth to the seventh/eighth century, as it seems also indicated by the pott…
Structural analysis, phase stability and electrochemical characterization of Nb doped BaCe0.9Y0.1O3−x electrolyte for IT-SOFCs
2012
Abstract To improve the chemical stability of high temperature proton conductors based on barium cerate, electrolyte powders doped with different amounts of niobium were synthesized by the citrate–nitrate auto-combustion method. Pure single phases of BaCe 0.9− x Nb x Y 0.1 O 3− x (BCYN, 0.03 ≤ x ≤ 0.12) were obtained by thermal treatment at 1000 °C. Sintering at 1450 °C for 10 h produced dense pellets. X-ray absorption spectroscopy allowed to define the dopant ion insertion site and the co-dopant valency. Treatments in pure CO 2 atmosphere at 700 °C for 3 h and subsequent XRD analysis were carried out to probe the chemical stability of the produced electrolytes. The influence of the prese…
Performance-Based Engineering of Wind-Excited Structures: A General Methodology
2016
The current prescriptive design philosophy that relies simply on meeting requirements stipulated in standards is shifting towards a performance-based design (PBD) approach for achieving designs that rationally meet society’s need for a truly safe built environment. Extensive research has facilitated the successful adoption of PBD in earthquake engineering, but the same cannot be said for wind engineering. Therefore, the need exists to initiate a similar effort by defining a framework that fully embraces the concepts of PBD during the design of building systems to resist severe wind events. This paper illustrates the development of such a PBD framework. In particular, a method is proposed sp…
Synthesis and structural studies on Ni(II) dithiocarbamates : Exploring intramolecular Ni···H-C interactions
2017
Abstract Five new Ni(II) dithiocarbamates with NiS4, NiS2PN and NiS2PCl coordination spheres, viz. [Ni(bupmbzdtc)2] (1), [Ni(bupmbzdtc)(PPh3)(NCS)] (2), [Ni(bupmbzdtc)(PPh3)Cl] (3), [Ni(4-dpmpzdtc)(PPh3)Cl] (4) and [Ni(pbbzbudtc)(PPh3)(NCS)] (5), where bupmbzdtc = N-butyl(p-methylbenzyl)dithiocarbamato anion, 4-dpmpzdtc = 4-(diphenylmethyl)piperazinecarbodithioato anion, pbbzbudtc = N-(p-bromobenzyl)butyl-dithiocarbamato anion and PPh3 = triphenylphosphine, were synthesized and characterized by UV, IR, NMR and single crystal X-ray diffraction methods. Spectral results suggest a square planar geometry around the Ni(II) metal center for all the synthesized complexes. Single crystal X-ray stru…
Le discours du mythe
2008
Limité à ce tournant encore peu exploré des études ethnologiques qui chevauche les années 1960, cet article explore quelques aspects de la transition de Lucien Sebag de sa formation philosophique à la théorie ethnologique, transition dont les piliers les plus importants sont l’apprentissage auprès de Claude Lévi-Strauss et ses enquêtes de terrain chez les Aché-Guayaki de la zone orientale du Paraguay et chez les Ayoré-Moros du Chaco paraguayen et bolivien. L’article met particulièrement en lumière la contribution de Sebag à l’analyse structurale des mythes et, par le dépassement de l’approche marxiste et de la démarche psychanalytique, les nouvelles perspectives qu’en accord avec la linguis…
Dynamic stability of plane elastic frames
1982
Abstract The stability of plane elastic frames subjected to a vertical foundation motion of the stationary, ergodic type is investigated. The equations of motion are obtained in modal co-ordinates, with account taken of many modes of vibration. The problem is subsequently reduced to the study of only the first mode of vibration. By considering a particular case, the stability domains are sketched as functions of the variation of the rigidities of the beam-column connecting joints and as functions of the number of stories.
Ricerche nella catacomba di Villagrazia di Carini
2018
The Quaderno Digitale 9 is dedicated to the archaeological researches conducted in the Early Christian catacomb of Villagrazia di Carini until year 2015. The essay of G. Schirò presents the results of the excavations carried out from 2008 to 2011 in the Gallery IX and the structural analysis of 36 burials. Marco Correra, in the second essay, presents the analysis of the types of closure of the tombs so far excavated, in comparison with other funerary contexts in Sicily, Sardinia and North Africa. Finally, Francesco Scirè and Marta Marescalchi illustrate the project drawn up for the enjoyment of the most representative sectors of the monument, whose visit was inaugurated in May 2015.