Search results for "Scienza"
showing 10 items of 1408 documents
LEONARDO SCIASCIA E PRIMO LEVI. APPUNTI SU ETICA E SCIENZA
2020
Nel secondo Novecento la minaccia nucleare angoscia l’intera umanità riaccendendo il dibattito sulla libertà della scienza e sull’intricato rapporto che questa intrattiene con il potere. Sciascia e Levi offrono nei loro scritti visioni della scienza assai diverse, talora opposte: Sciascia rivendica la superiorità della cultura umanistica (e letteraria) rispetto alla cultura scientifica, confermando la frattura denunciata da C. P. Snow che il chimico Levi considerava, invece, innaturale. Nonostante la differenza di prospettive, emerge tuttavia per entrambi la necessità che il discorso intorno alla scienza sia affrontato mediante il paradigma dell’etica.
Educare la libertà e il discernimento
2015
L'articolo parte dal dato evidente che si danno gesti di libertà autentica; analizza tre interpretazioni della libertà, quella liberista quella liberale e quella liberante. Quest'ultima è quella conveniente all'educazione di una persona; nel saggio se ne parla come educazione della virtù del discernimento e come "apprendere ad ascoltare la voce della coscienza".
On the Limit Behaviour of Moment Resisting Connections Under Uncertainties
2021
Abstract Moment resisting connections are mainly designed to transfer bending moments and shear forces. Generally speaking, the design strength of a moment resisting connection can be classified as full-strength (moment capacity of the connection equal to or greater than that of the connected member) or partial-strength (the moment capacity of the connection less than that of the connected member). Similar remarks can be made regarding the stiffness defining connection rigid or semi-rigid if compared to the stiffness of the connected member. In the past, full-strength connections have been widely adopted especially in moment resisting frames and their structural performance relied on the pr…
De Saint-Venant flexure-torsion problem handled by Line Element-less Method (LEM)
2010
In this paper, the De Saint-Venant flexure-torsion problem is developed via a technique by means of a novel complex potential function analytic in all the domain whose real and imaginary parts are related to the shear stresses. The latter feature makes the complex analysis enforceable for the shear problem. Taking full advantage of the double-ended Laurent series involving harmonic polynomials, a novel element-free weak form procedure, labelled Line Element-less Method (LEM), is introduced, imposing that the square of the net flux across the border is minimized with respect to expansion coefficients. Numerical implementation of the LEM results in systems of linear algebraic equations involv…
Frictionless contact-detachment analysis: iterative linear complementarity and quadratic programming approaches.
2012
The object of the paper concerns a consistent formulation of the classical Signorini’s theory regarding the frictionless contact problem between two elastic bodies in the hypothesis of small displacements and strains. The employment of the symmetric Galerkin boundary element method, based on boundary discrete quantities, makes it possible to distinguish two different boundary types, one in contact as the zone of potential detachment, called the real boundary, the other detached as the zone of potential contact, called the virtual boundary. The contact-detachment problem is decomposed into two sub-problems: one is purely elastic, the other regards the contact condition. Following this method…
Economic Consequences of Investing in Anti-HCV Antiviral Treatment from the Italian NHS Perspective: A Real-World-Based Analysis of PITER Data
2019
OBJECTIVE:\ud We estimated the cost consequence of Italian National Health System (NHS) investment in direct-acting antiviral (DAA) therapy according to hepatitis C virus (HCV) treatment access policies in Italy.\ud \ud METHODS:\ud A multistate, 20-year time horizon Markov model of HCV liver disease progression was developed. Fibrosis stage, age and genotype distributions were derived from the Italian Platform for the Study of Viral Hepatitis Therapies (PITER) cohort. The treatment efficacy, disease progression probabilities and direct costs in each health state were obtained from the literature. The break-even point in time (BPT) was defined as the period of time required for the cumulativ…
Bertrand Russell
2015
Bertrand Russell has been one of the most influential philosophers of the 20th Century. The importance of his work can not be confined to a particular thematic area such as mathematical logic or philosophy of language. Extraordinary vital, extremely curious and with a very acute intellect, he has produced an immense body of work. Bertrand Russell è stato uno dei filosofi più influenti del '900. L'importanza del suo lavoro non può essere confinata ad un particolare ambito tematico quale la logica matematica o la filosofia del linguaggio. Dotato di una vitalità straordinaria, di una grande curiosità e di un intelletto acutissimo, la sua produzione scientifica è sterminata.
Analysis of a Collapsed Long-Span Reinforced Concrete Roof in South Italy: Design Mistakes and Material Degradation
2020
In 2004, during ordinary maintenance work, consisting of waterproofing a building located in the south of Italy, the long-span (14.5 m) in situ RC roof partially collapsed. The building, constructed in 1950, was in service as a cinema until 1967 and then utilized as a school until 1985. Lastly, it was a hotel until 2000. In 2004, when the building was not in service and was undergoing maintenance work, it partially collapsed under dead load. After the collapse, which involved a large portion of the roof, several beams, and two columns, the Italian court nominated an official technical consultant to investigate the direct and related causes of the failure. After the main causes were identifi…
Probabilistic analysis of non-local random media
2008
Computational stochastic methods have been devoted over the last years to analysis and quantification of the mechanical response of engineering systems involving random media. Specifically analysis of random, heterogeneous media is getting more and more important with the emergence of new complex materials requiring reliable methods to provide accurate probabilistic response. Advanced materials, often used at nano or meso-levels possess strong non-local characters showing that long-range forces between non-adjacent volume elements play an important role in mechanical response. Moreover long and short-range molecular interactions may have random nature due to unpredictable fabrication proces…
The finite element method for the mechanically-based model of non-local continuum
2011
In this paper the finite element method (FEM) for the mechanically based non-local elastic continuum model is proposed. In such a model each volume element of the domain is considered mutually interacting with the others, beside classical interactions involved by the Cauchy stress field, by means of central body forces that are monotonically decreasing with their inter-distance and proportional to the product of the interacting volume elements. The constitutive relations of the long-range interactions involve the product of the relative displacement of the centroids of volume elements by a proper, distance-decaying function, which accounts for the decrement of the long-range interactions as…