2,567 research outputs found
Ergodic Theorems for Dynamic Imprecise Probability Kinematics
Full text linkWe formulate an ergodic theory for the (almost sure) limit
of a sequence
of successive dynamic imprecise
probability kinematics (DIPK, introduced in Caprio and Gong, 2021) updates of a
set representing the initial beliefs of
an agent. As a consequence, we formulate a strong law of large numbers
Michele Taruffo: el magisterio y la obra ejemplares del genial procesalista «todoterreno»
No full textThe author reflects on Michele Taruffo’s extraordinarily important contribution to the renewal of both conventional procedural law scholarship and the theoretical background of law-court professionals. Taruffo’s contribution was achieved by means of introducing to mainstream culture in those circles the necessary knowledge of the underlying epistemic dimension, which was traditionally suppressed by the strictly legal one.El autor discurre acerca de la importantísima contribución de Michele Taruffo a la renovación del procesalismo convencional y del bagaje teórico de los profesionales de la jurisdicción, mediante la incorporación a la cultura dominante en tales medios del imprescindible conocimiento de la dimensión epistémica subyacente y tradicionalmente sofocada por la propiamente jurídica
Residual Strength Prediction by Numerical Analyses of CFRP Plates Repaired with Flush Scarf Bonded Patch
No full textThe widespread use of CFRP laminates in many industrial fields and especially in the aerospace industry, introduces a large number of issues regarding the repair procedures to be adopted due to various kinds of damages. This work aims at providing a numerical FE modelling procedure in order to obtain, for composite laminates repaired by flush scarf bonded patch, accurate results in terms of prediction of the residual strength with the lowest computational cost. The numerical analyses have been developed by using the commercial finite element code ANSYS®. Data from literature, numerical and also experimental, have been used in order to validate the proposed methodology. The stress distribution within the adhesive film and the final residual strength of repaired laminates, loaded in tension, has been used as reference parameters for comparison purpose. Progressive Failure Analysis (PFA) has been performed on composite laminates comparing different mesh modelling approaches and different elastic-plastic material models for the adhesive. As far as the mesh modelling approach is concerned, solid layered and not layered finite elements have been investigated, while in order to simulate the mechanical behaviour of the adhesive, two different material models have been compared: BISO (Bilinear ISOtropic hardening) and ANISO (ANISOtropic plasticity). The results of the numerical analyses performed on the above laminates, provide useful information regarding the advantages and disadvantages of both modelling methods and of both material models of the adhesive, in terms of accuracy and computational costs
Occupants’ Injury during a Drop Test of an Advanced Composite Fuselage Section
No full textThe emergency landing is an important design criteria in airworthiness certification. It is associated to the cabin safety and consequently to the risk of serious injury for the occupant. The loads transmitted to the passengers during a hard landing can be fatal both in terms of intensity and duration time, and the energy absorbing systems play a fundamental role to dissipate the energies unleashed during the impacts. A barrel section was studied by the Finite Element Method to simulate the drop test consequences for the fuselage section of a wide body aircraft, and a medium velocity impact was applied to design devices and substructures able to dissipate the biggest amount of kinetic energy. A validation process was obtained following three different steps: firstly, investigating the materials, layups and material characteristics changing with load’s velocity, secondly different tests were performed on the demonstrators in order to verify the installation parameter of the devices devoted to absorb the energies, and finally the experimental results were extended on the lower lobe of the sub-cargo compartment tested at low velocity impact. These experimental results and the correlation with the numerical models allowed to extend the results on the barrel section and to evaluate the accelerations transmitted during the drop to the occupants. The satisfactory results estimated by the numerical solvers are able to aid the design and to reduce the experimental testing for the identification and the choice of different candidate solutions
Fuselage Advanced Composite Design to Comply with an Emergency Landing Test
No full textThe emergency landing is an important design criteria in airworthiness certification. It is associated to the cabin safety and consequently to the risk of serious injury for the occupant. The loads transmitted to the passengers during a hard landing can be fatal both in terms of intensity and duration time, and the energy absorbing systems play a fundamental role to dissipate the energies unleashed during the impacts.
A barrel section was studied by the Finite Element Method to simulate the drop test consequences for the fuselage section of a wide body aircraft, and a medium velocity impact was applied to design devices and substructures able to dissipate the biggest amount of kinetic energy.
A validation process was obtained following three different steps: firstly, investigating the materials, layups and material characteristics changing with load’s velocity, secondly different tests were performed on the demonstrators in order to verify the installation parameter of the devices devoted to absorb the energies, and finally the experimental results were extended on the lower lobe of the sub-cargo compartment tested at low velocity impact. These experimental results and the correlation with the numerical models allowed to extend the results on the barrel section and to evaluate the accelerations transmitted during the drop to the occupants. The satisfactory results estimated by the numerical solvers are able to aid the design and to reduce the experimental testing for the identification and the choice of different candidate solutions
Turnpike in infinite dimension
Full text linkLet Φ be a correspondence from a normed vector space X into itself, let u : X → R be a function, and let I be an ideal on N. In addition, assume that the restriction of u on the fixed points of Φ has a unique maximizer η*. Then, we consider feasible paths (x0, x1,.) with values in X such that xn+1 ∈ Φ(xn), for all n ≥ 0. Under certain additional conditions, we prove the following turnpike result: every feasible path (x0, x1,.) which maximizes the smallest I-cluster point of the sequence (u(x0), u(x1),.) is necessarily I-convergent to η*. We provide examples that, on the one hand, justify the hypotheses of our result and, on the other hand, prove that we are including new cases which were previously not considered in the related literature
Looking for Japan in contemporary Italy
No full textPh. D.Includes bibliographical referencesIncludes vitaby Michele Monserrat
The Author Reply. Letter to the Editor
No full textThe Author reply to the Letter sent to the Editor about a previus article on low anterior resection
Figure dell’autore nei volgarizzamenti e nelle cronache in volgare. Aspetti teorici e linee di una ricerca storico-linguistica nei testi medievali
No full textQuesto contributo mette a fuoco idee e concezioni dell'autorialità in testi storici in volgare e volgarizzamenti di opere storiche: da Dino Compagni e Giovanni Villani all'Anonimo romano, dai volgarizzamenti di Binduccio dello Scelto e Giamboni alle sezioni della Cronaca di Partenope frutto del lavoro di riadattamento e traduzione di testi anteriori.
Il lavoro punta a offrire un quadro che tenga conto di testi di diverse aree italoromanze medievali, delle quali sono messe a fuoco analogie e differenze prestando attenzione a strategie testuali, campi semantici e scelte lessicali relative all'immagine dell'autore. In particolare, sono analizzati i marchi di storicità con cui sono evidenziati la verità del resoconto e il ruolo della testimonianza personale, l'uso di parole-chiave relative all'atto del narrare, l'attenzione per gli aspetti materiali di composizione e assemblaggio di fonti in nuovi testi. Vengono così isolate tre declinazioni della idea di autorialità, cui corrispondono tre immagini: lo storico (in quanto)-testimone, lo storico (in quanto)-narratore, lo storico (in quanto)-compositore
- …
