Search results for " vault"

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…

Besprechung: Ch. Bakirtzis (Hrsg.), Mosaics of Thessaloniki. 4th-14th century, Athens 2012.

2014

Ch. Bakirtzis (Hrsg.), Mosaics of Thessaloniki. 4th-14th century, Athens 2012, 359 S. + 395 Abb. ISBN 978-960-6878-36-7

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…

Crociere e lunette in Sicilia e in Italia meridionale nel XVI secolo. Dalla costruzione gotica all'affermazione di un modello peninsulare

2016

Se gli studi di storia dell’architettura privilegiano spesso le “avanguardie” e i casi eccezionali, in alcuni contesti aspetti altrettanto importanti per le valutazioni storiografiche emergono da una riflessione su continuità, ripetizioni, serialità. Le ragioni della persistenza o della riproposizione di certe soluzioni non sono infatti sempre le più ovvie o possono risultare meritevoli di ulteriori valutazioni sul peso di alcune componenti piuttosto che di altre. Un ripensamento dei parametri di lettura e del contesto di riferimento può svelare l’infondatezza di alcuni presunti anacronismi; mentre dietro la ripetizione apparentemente inerte si celano non di rado, a un’osservazione più appr…

Monitoring of rheologic variables during postoperative high-dose brachytherapy for uterine cancer.

2004

Oxygenation of tumor tissue has recently been assed an important prerequisite for the effectiveness of radiotherapy in cervical cancer. Hyperviscosity is a common phenomenon in malignancy and a cause of reduced oxygen transport capacity that would favour tissue hypoxia. Hemorheological variables were serially tested preoperatively, during four cycles of fractionated adjuvant IR192 HDR after loading radiation (HDR-AL) of the vaginal vault (weekly intervals), and 6 months postoperatively in patients with cervical (n=12) and endometrial cancer (n=26). Women who were scheduled for benign tumor surgery served as controls (n=29). Preoperatively, in cervical and endometrial cancer patients, mean …

A case study of the structural behavior of a catalan bricks masonry vault

2014

I Barrai, picapedrers cagliaritani della seconda metà del Cinquecento. Stato degli studi e nuove ipotesi

2014

This essay is focused on the Barrai family, a group of stonecutters operating in Cagliari between 15th and 16th centuries. The family played a leading role in the construction and diffusion of star-shaped rib vaults in the late Sardinian 16th centuries religious architecture. The study attempts to systematize available evidence and information about the Barrai family in order to provide a starting point for further investigation. New hypotheses about the family’s genealogy and activity during the second half of the 16th century are also explored.

Case Study of the Structural Behavior of a Catalan Bricks Masonry Vault

2015

Catalan vaults are a peculiar type of low thickness vaulted brick masonry structure. Knowledge of load-deflection response and load bearing capacity are important aspects to consider with the aim of preserving these structural members as part of the cultural heritage. In order to investigate these aspects, complete knowledge of the constituent materials and geometry (dimension, thickness, constructive section) is necessary in such a way as to predict the load-deflection response and the effective load-carrying capacity; the latter can be determined utilizing simplified models (limit analysis) or by means of a numerical analysis (finite element method). With this aim, the structural behaviou…

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…

Combined surgical and prosthetic approach for rehabilitation of frontonasal defect using custom made titanium implant: a case report

2011

Cranial vault deformities as a sequelae to trauma may be as high as 70%. The basic indications for cranioplasty are improvement of disfigured aesthetics and to provide protection to the intra-cranial contents. The possibility of producing custom-made implants opened a new era in the reconstructive surgery of the craniofacial deformities. The outcome of craniofacial bone reconstruction is thought to be dependent on surgical skills, quality of adjacent soft tissues, size and location of the bone defect and choice of repair method. The use of autologous bone for craniofacial reconstruction may be restricted due to limited amounts of donor bone. Combined surgical and prosthetic rehabilitation o…