Search results for "scienza"

"Voce" e "Voce articolata": Omero e le origini della scienza greca

1996

Il presente contributo si propone di dimostrare che Omero è alle origini della tradizione scientifica greca. Ciò contraddicie l'autorevole opinione di Bruno Snell, che nel suo celbre volume 'die Entdeckung des Geistes' considerava il linguaggio di omero preteorico e preconcettuale, e Omero l'antitesi della scienza e della filosofia. il terreno della dimostrazione è il vocabolario omercio della voce e del linguaggio. in Omero, esistono qattro famiglie di termini indicanti la voce, intesa in senso lato: Phongos/phthengomai, ops e derivati, phoné e derivati, audé e derivati. Queste si organizzazno in una duplice coppia Phongos/ops e phoné/audé. mentre la prima coppia, più antica, marca l'assen…

Modellazione numerica del comportamento meccanico delle volte catalane

2010

Il presente lavoro riguarda la modellazione numerica del comportamento costitutivo delle cosiddette volte in foglio (le bóvedas tabicadas) che rappresentano una delle tecniche edilizie tradizionali catalane più diffusamente impiegate da alcuni tra i più grandi architetti spagnoli (primo fra tutti Gaudí) alla fine del XIX secolo [1-3]. Tali volte risultano fondamentalmente costituite da strati alternati di spessore in generale pressoché uguale di mattoni e di malta. Questa particolare caratteristica viene studiata in questo lavoro nel quale si vuole confrontare la modellazione del comportamento costitutivo considerando il materiale come ideale omogeneo con quella ottenuta modellando il mater…

Analisi numerica e sperimentale sul comportamento meccanico delle volte catalane

2008

Palermo

2021

Il capitolo analizza la distribuzione del disagio sociale nelle aree suburbane della città e si concentra sulla relazione fra disagio sociale e comportamento elettorale.

The mechanically based non-local elasticity: an overview of main results and future challenges

2013

The mechanically based non-local elasticity has been used, recently, in wider and wider engineering applications involving small-size devices and/or materials with marked microstructures. The key feature of the model involves the presence of non-local effects as additional body forces acting on material masses and depending on their relative displacements. An overview of the main results of the theory is reported in this paper.

Welded section defence by LRPD devices

2023

The present paper concerns a special application of some recently proposed structural devices, called LRPD, able to protect the welded sections of frame steel structures from undesired brittle collapse ensuring the good expected ductile behaviour. Standard I-shaped cross-sections are treated, and the proposed devices are suitably considered as moment resisting connections between beams and columns. At first the domain representing the brittle safe conditions is defined in the N,V,M space; then a sample plane frame subjected to seismic load conditions is studied and it is proved that, equipping the structure with the proposed devices suitably designed, the generalized stresses at the welded …

Biodeterioration of the Wooden Roof of the Phnom Penh National Museum

2017

Within the framework of a training program in Cambodia, during a visit to the National Museum in Phnom Penh, the most important in the Kingdom of Cambodia, the authors noted the presence of some signs of a termite attack in the secondary elements of the roof of an inner garden. Following this observation, a further investigation was performed in order to evaluate the phytosanitary condition of the wooden bearing element of the roof. The inspection highlighted the presence of severe decay, constituting a real danger for the integrity of the roof; consequently, an intervention of restoration, conservation and safeguard was considered to be necessary and urgent. This paper presents the results…

Photocatalytic nano-composite architectural lime mortar for degradation of urban pollutants under solar and visible (interior) light

2017

Abstract Recent advances in nano-technology and nano-additives can give enhanced properties to natural hydraulic lime (NHL), creating a multifunctional material. We have prepared a novel nanocomposite, made of a commercial mortar with 1 wt% and 5 wt% added titania nanoparticles (NPs). These TiO 2 NPs are themselves doped with 1 mol% silver, to give the material enhanced photocatalytic and antimicrobial properties. The Ag-doped TiO 2 NPs were made from a simple, costs effective, aqueous green nanosynthesis process, and the end material only contains 0.01–0.05% Ag. As this mortar is intended to both combat atmospheric pollution, and create more durable/lower maintenance building facades (plas…