Search results for "NICHE"

Decorazione, illustrazione o metafora? Su un gruppo di terrecotte architettoniche dal sito di S. Biagio ad Agrigento

2014

At the end of the 19th cent. P. Orsi acquired for the Archaeological Museum of Syracuse a group of architectural terracottas said to come from Agrigentum, San Biagio area (on the SE slope of the Rupe Atenea). This lot, left quite unnoticed until now, consists of six antefixes of late 5th-early 3rd cent. B.C. Tarantine types with relief heads of Gorgo-Medusa, Pan, and Artemis Bendis, that can confirm the circulation of these products, known otherwhere in Sicily by a few specimens from Gela excavations and from surface finds. But the most noteworthy piece is a fragmentary clay sima with a lion head spout, dated around 280-70 B.C., that is particularly interesting both for the technique and fo…

L'igiene sociale nel XIX e XX secolo. I lavatoi pubblici

2014

In the renewal of hygienic standards promoted by European Nations, many build-ings had to align themselves with the latest dictates of medical science and of "hy-gienist" engineers: one of these were the public laundries. The Exhibition of Hygiene clarified the objectives to be followed in the design: first of all, the laundries had to satisfy the needs of public health, preventing the spread of infectious germs and ensuring the health of the people, often subjected to serious influences for the infected garments and the moisture that they endured for most of the day; at the same time, these buildings had to create the decorum in the popular districts of the city and therefore they had to b…

Una camera a termoigrometria controllata, a tre celle separabili, per misure di permeabilità al vapore

2002

In questo lavoro è descritta la progettazione e la realizzazione di una nuova apparecchiatura per le misure sperimentali della permeabilità al vapore dei materiali. E’ stato dimensionato, costruito e strumentato un box climatizzato, secondo i requisiti richiesti dalla normativa europea che si occupa di tali sperimentazioni. Tale lavoro vuole rappresentare la pratica attualizzazione, oltre che la continuazione, di una lunga serie di studi affrontati realizzando una prima serie di apparecchiature per le prove di permeabilità al vapore su campioni di legno. Riprendendo questi temi, il lavoro oggetto della seguente tesi di laurea affronta una concreta riprogettazione delle camere climatizzate p…

Il metodo PUMA per la stima dell’incertezza

2009

L’indagine sonica ed ultrasonica come prassi necessaria alla conoscenza di strutture complesse. Il rimontaggio di una statua di epoca romana da Locri…

2008

Correlazione tra indici di freschezza e tecniche di pesca artigianali (“a cianciolo”) di specie di pesce azzurro (E. Encrasicolus, S. Pilchardus)

2012

Aquatic Macrophytes Occurrence in Mediterranean Farm Ponds: Preliminary Investigations in North-Western Sicily (Italy)

2021

Mediterranean wetlands are severely affected by habitat degradation and related loss of biodiversity. In this scenario, the wide number of artificial farm ponds can play a significant role in the biodiversity conservation of aquatic flora. In the present contribution we show the preliminary results of a study on Mediterranean farm ponds of north-western Sicily (Italy), aimed to investigating the environmental factors linked to the occurrence of submerged macrophytes (vascular plants and charophytes). We studied the aquatic flora of 30 ponds and determined the chemical and isotopic composition of their water bodies on a subset of the most representative 10 sites. Results show that (1) farm p…

Innovazioni sceniche nella Parigi del primo Novecento

2012

Tra la fine del XIX e l'inizio del XX secolo Parigi vive la sfrenata corsa al divertimento di una società aperta ad ogni forma di novità, fra café chanlants e atmosfere éclatantes offerte da teatri gestiti da impresari dal piglio internazionale o dagli spettacoli di foire dei grandi eventi fino al gusto del guiness. Su un altro piano c'è il bisogno di garantire dignità artistica al teatro a fronte della banalità e della routine del teatro commerciale, ma anche di proiettarlo verso prospettive di radicale rinnovamento dei criteri di messinscena. In questo variegato panorama si intrecciano percorsi diversi, persino contrapposti, che vedono coinvolti artisti ed esperienze prove da tutta Europa…

Metrological performances of voltage and current instrument transformers in harmonics measurements

2018

In the new electrical system scenario, the increasing presence of non-linear loads and renewable energy sources makes the measurement of harmonics an essential task. The accuracy of harmonic measurement firstly depends on the used instrument transformers for voltage and current sensing. Since the behavior of instrument transformers in non-sinusoidal conditions is not always well defined, this paper presents an experimental study on the metrological performances of current and voltage instrument transformers (CTs and VTs) in the presence of harmonics. Proper tests procedures are defined and measurement setups are developed for both CTs and VTs calibration. The analysis is carried out by usin…

Current transformers effects on the measurement of harmonic active power in LV and MV networks

2011

The harmonic active power is used to determine the location of polluting loads, the direction of harmonic power flow and to estimate how consequential a certain current harmonic source is. The highest uncertainties, when measuring harmonic active power, are introduced by the current and voltage transducers. This paper presents experimental results which show the impact of current transformers (CTs) on the accuracy of the harmonic power measurements. An expression for the evaluation of the power error in distorted conditions was developed which can be easily utilized in the case of linear current transducers. It is shown how CTs cannot be considered linear transducers and how the higher the …