Search results for "cienza"
showing 10 items of 1535 documents
Stability of foreign aid agreement: a general equilibrium experimental analysis
2011
The FE-Meshless multiscale approach applied to masonry structures
2015
Heterogeneous structures have an overall response that is strongly dependent on the inelastic events developing at the local level. In these structures, the most relevant kinematical and mechanical phenomena take place at a scale which is small if compared to the dimensions of the entire structure. In literature, a mesoscopic and a macroscopic scales of interest are distinguished, directly linked to as many theoretical approaches. The mesoscopic approach [1] considers materials and their interfaces individually, but many difficulties arise in the mesh creation and a fine discretization of the structure is needed, which leads to prohibitive computational costs. The macroscopic approach consi…
Introduzione. Sicurezza e cambiamento
2012
Lower bound limit analysis by bem: Convex optimization problem and incremental approach
2013
Abstract The lower bound limit approach of the classical plasticity theory is rephrased using the Multidomain Symmetric Galerkin Boundary Element Method, under conditions of plane and initial strains, ideal plasticity and associated flow rule. The new formulation couples a multidomain procedure with nonlinear programming techniques and defines the self-equilibrium stress field by an equation involving all the substructures (bem-elements) of the discretized system. The analysis is performed in a canonical form as a convex optimization problem with quadratic constraints, in terms of discrete variables, and implemented using the Karnak.sGbem code coupled with the optimization toolbox by MatLab…
MACRO-ZONES SGBEM APPROACH FOR STATIC SHAKEDOWN ANALYSIS AS CONVEX OPTIMIZATION
2013
A new strategy utilizing the Multidomain SGBEM for rapidly performing shakedown analysis as a convex optimization problem has been shown in this paper. The present multidomain approach, called displacement method, makes it possible to consider step-wise physically and geometrically nonhomogeneous materials and to obtain a self-equilibrium stress equation regarding all the bem-elements of the structure. Since this equation includes influence coefficients, which characterize the input of the quadratic constraints, it provides a nonlinear optimization problem solved as a convex optimization problem. Furthermore, the strategy makes it possible to introduce a domain discretization exclusively of…
A Derrota da Esquerda como a Direita Gosta
2001
Itália. Abril de 1996. Facto histórico. O antigo maior partido comunista do Ocidente, aliado à pequenas agregações centristas, vence as eleições nacionais, depois de passar 50 anos à margem da gestão do Estado, devido ao veto ianque, da Igreja e do capital, apesar de contar com cerca de 30% do eleitorado. O Partido da Refundação Comunista, que nascera em 1991, quando o PCI mudara de nome para Partido dos Democratas de Esquerda [PDS], assumindo-se social-democrata, apoiara, de fora, a coligação. O PRC formara-se com operários, Estalinistas, maoistas, sindicalistas, trotskistas, etc. que se haviam negado a terminar a luta anti-capitalista. Nem mesmo no horizonte político, a coligação do Ulivo…
Crisi e ordine globale. Verso il declino dell'ordine multilaterale occidentale?
2014
Agostino Scilla (1629-1700) e la cultura visuale della historia, fra antiquaria e storia naturale
Il presente lavoro affronta la questione del rapporto fra cultura visuale e pratiche di conoscenza storica e scientifica nel secondo Seicento, attraverso l’esame della vicenda intellettuale di Agostino Scilla (Messina 1629- Roma 1700) pittore, antiquario e filosofo naturale di scuola galileiana. L’ipotesi che si intende dimostrare è che la molteplicità prismatica della vicenda intellettuale di Scilla, finora poco conosciuta e affrontata attraverso gli approcci mutuamente esclusivi della storia dell’arte e della storia della scienza, possa essere ricondotta a coerenza attraverso un approccio ravvicinato alla questione della cultura visuale, espressa tanto nell’attività pittorica quanto nella…
Delamination study of Z-pinned composite laminates via two-phase interface model.
2008
One of the most effective technique, developed over the last decade, to enhance the strength of the composite laminates in the thickness direction (z-direction), is the through-thickness reinforcement in form of stitching [2], [4] or short rods inserting [3]. These reinforcing fibres, providing direct closure tractions to the potential delamination crack faces (bridging effect), increase the interlaminar fracture toughness. The reinforcement system can be applied extensively to the composite laminate or restricted to those critical structural zones that are subjected to high interlaminar stresses. The through-thickness reinforcement is also used in composite-composite assemblages where, cou…