Search results for " vault"
showing 10 items of 34 documents
The ‘false vaults’ in the architecture of Sicily
2015
Between the end of the 17th century and the first decades of the 18th, Sicily was struck by several violent earthquakes. The total and partial collapse of monumental buildings produced a global debate involving various aspects of construction practice. One of the central topics of discussion was the construction of domes and large vaulted structures. Some architects studied the possibility of using so-called ‘false vaults’, a kind of lightweight structure created with a wooden frame, reed mats, and plaster. The technique was probably known by the 16th century and was used in a few major monuments, such as the dome of the Palermo Cathedral, in the mid-17th century. It was only after the Eart…
Interventi su volte sottili di mattoni in foglio in Sicilia (Intervention on tiled vaults in Sicily)
2016
Recenti studi hanno confermato come la diffusione nella Sicilia occidentale delle volte sottili di mattoni in foglio (“realine”) sia avvenuta in maniera estesa dalla seconda metà del secolo XVIII ai primi decenni del Novecento, sia negli orizzontamenti e nelle scale dell'edilizia corrente, che con funzione portante e di soffittatura nelle architetture nobiliari. Per finalità di studio o professionali se ne sono analizzati i caratteri costruttivi, le costanti e le variabili, con verifiche su strutture che hanno superato indenni le prove del tempo. In laboratorio o nei cantieri sono state effettuate sperimentazioni accademiche ed interventi di recupero, con ricostruzioni parziali o totali e i…
Timbrel vaults in Sicily. Constructive techniques and intervention methodologies
2017
Tra le tante tipologie di volte riscontrate sul territorio siciliano finalizzate a coniugare economia e leggerezza senza perdere in sicurezza, vengono in questo studio analizzate quelle costituite da due, tre o quattro fogli di mattoni sottili uniti con gesso (volte realine secondo la definizione locale). Non si hanno notizie certe sull’origine di queste volte che, probabilmente introdotte dall’area iberica in Sicilia nella prima metà del XVIII secolo, evidenziano come un sistema costruttivo importato da aree geografiche spesso molto distanti possa essere reinterpretato in funzione dei materiali disponibili e della cultura edilizia locale. Ciò ha in più occasioni determinato soluzioni origi…
Adjuvant volumetric-modulated arc therapy with simultaneous integrated boost in endometrial cancer. Planning and toxicity comparison
2014
Objective. To report dosimetric and acute toxicity data in prospectively enrolled high-intermediate risk endometrial cancer (HIR-EC) patients postoperatively irradiated by simultaneous integrated boost volumetric modulated arc therapy (SIB-VMAT). Methods. Thirty prospectively enrolled HIR-EC patients were postoperatively treated by SIB-VMAT. Target coverage, dose homogeneity, and sparing of organs at risk (OARs) were compared with corresponding data retrieved from an historical control (30 consecutive selected matched patients) treated by concomitant boost three-dimensional conformal radiotherapy (3D CRT CB) from a previously published study (ADA-I trial). All patients received 45 Gy on pel…
Computed Tomography in Processes at the Base of the Skull and in the Skull Vault
1981
Many CT systems allow detailed examination of the bony structures of the base of the skull and the vault. Elimination of the waterbox and enlargement of the opening of the gantry allows free positioning of the head, use of coronary projections, and studies of the base of the skull. A high-resolution matrix (320 × 320 for the EMI 5005 used in most of the studies in our series) provides a high degree of accuracy. A number of authors has reported on the use of computed tomography in studying the base of the skull, especially for planning surgical proce duresor radiation therapy (Liliequist and Forsell 1976; Bradac et al. 1977 b; Bradac et al. 1977c; Bradac et al. 1978; Hammerschlag et al. 1977…
Stereotomy of the Late-Medieval Mediterranean. Crossroads of Experimental Design
2015
This paper analyses some specific case studies of vault and spiral staircase construction built in Sicily in the 12th and 13th centuries during Norman and Swabian rule, as a site of experimenta-tion in the field of stereotomy. The list of such examples still extant (in Palermo some details of the cathedral, the muqarnas in the Zisa Palace and its palatine chapel – the first stone muqarnas in the Mediterranean -, in Syracuse and Catania the castles built during the reign of Frederick II, etc) must be considered in conjunction with similar constructions, now lost or ruined, especially by earthquakes (eg. the intriguing Hall of Syracuse and Mongialino Castle). Among these exam-ples are buildin…
On the analysis of Catalan thin vaults
2010
This paper is concerned with the identification, modelling and analysis of thin layered vaults, typical in the Catalan constructions of the XIX century. These special structures, also known as bovedas tabicadas, are characterized by very low thickness with respect to the medium surface dimensions and by the presence of different superimposed layers of bricks tied with mortar, are studied in order to individuate a coherent mechanical model for describing the material behaviour, to recognize the structural response utilizing as comparison adequate experimental results, and to extend the obtained results for the analysis of new vaults or for the restoration design of existing vaults. Firstly, …
Tiled vaults in western Sicily. Originality and continuity of an imported building technique
2012
Abstract The search for alternatives to wood for floorings has led to very interesting experiments on vaulted structures, with diffusion in specific areas. We analyze the Sicilian ones consisting of three layers of tiles with plaster, introduced in the mid-eighteenth century, reinterpreted with the local materials and building culture, with original and ingenious solutions as to seismicity of area. The oldest examples in Palermo date back to the period following the earthquake of 1726, considered a good solution because of their lightness and presumed monolithic structure, able to reduce the pressure on walls. This report is an assessment of this building system, that we found during many r…
LAPAROSCOPIC SACROCOLPOPEXY IN THE TREATMENT OF VAGINAL VAULT PROLAPSE AND RECTOCELE. RETROSPECTIVE STUDY OF 64 CASES
2003
Objectives: To evaluate the results of the laparoscopic sacrocolpopexy using a polypropylene mesh. Methods: We performed laparoscopic sacrocolpopexy on 64 pts who presented a prolapse of the vaginal vault between the II and the IV degree according to HWS classification. The mean age was 65 (range 58-76) with variable parity. The vaginal vault prolapse was present after abdominal hysterectomy in 33 pts.(51%) and after vaginal hysterectomy in 24 pts. (38%). 7 pts. (11%) were affected by an isterocele of III -IV . 8pts(12%) presented a vault prolapse of I degree, 16pts.(25%) of II degree, 15pts.(23%) of III degree, 18 pts.(%) of VI degree.They were also affected by different degrees of cystour…
Laparoscopic sacrocolpopexy in the treatment of vaginal vault prolapse: 8 years experience
2009
Abstract Objective The aim of this study was to evaluate the long-term results of a laparoscopic sacrocolpopexy for the treatment of vaginal vault prolapse. Study design Between January 1999 and January 2007, 165 laparoscopic sacrocolpopexy procedures, using a polypropylene mesh, were performed on women affected by vaginal vault prolapse. Intraoperative complications included: 5 bladder injuries and 3 sigmoid perforations. Postoperative complications included: 10 cases of fever, 5 cases of lumbosciatica, 15 cases of detrusor overactivity, 2 cases of vaginal haematoma, and 5 cases of minimal dispareunia. At 1, 6 and 12 months after surgery, a clinical evaluation was carried out for all patie…