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A simple structural model for a masonry arch-wall system subjected to dead vertical loads
No full textArches of various sizes and shapes can be found bearing the weight of vertical walls in almost all ancient masonry buildings. The most common arch shapes are round, or semicircular, and pointed, the so-called ogival arch, typical of Romanesque and Gothic architecture. The aim of this work is to study such structural systems by considering them composite systems made up of an arch and an overlying wall, both made of masonry. The study applies a simple mechanical model, in which the arch and wall are schematized as one-dimensional elements, in general characterized by nonlinear elastic behavior.
In the case that the displacements undergone by the arch are sufficiently small in comparison to those of the wall, it can be shown that the distribution of the loads transmitted by the wall to the arch differs considerably from the distribution deduced by assuming each vertical strip of wall to be sustained directly by the underlying arch element. Though rather small, such differences sometimes involve a critical difference in the load bearing capacity of the arch, calculated under the assumption that the arch’s constituent material cannot withstand traction and has limited compressive strength. The model enables, among other things, evaluating the effect on bearing capacity of substituting a semicircular arch with an ogival one of equal thickness and span. The results of such comparison clearly reveal the superiority of the latter arch type over the former in terms of the maximum possible height of the overlying wall under equilibrium conditions
La piperacillina nel trattamento delle prostatiti croniche batteriche. Min Urol Nefrol 39,343,1987.
No full textRenal and ureteral matrix stones: Removal by means of endoscopic surgery and chemolysis [Calcolosi molle pielica ed ureterale: rimozione mediante manovre endoscopiche e chemiolisi ]
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La nutrizione parenterale totale nella chirurgia urologica dell'anziano. Giorn Geront XXXV,951,1987
No full textTreatment of urinary fistulas after resection of horseshoe kidneys by selective arterial embolization
No full textTrattamento chirurgico dell'ureterocele ortotopico nell'adulto: Valutazione clinica di 25 casi. I
No full textGli antiestrogeni (tamoxifene e clomifene citrato) nel trattamento dell'oligospermia primitiva.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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