Search results for "Ferro"
showing 10 items of 2451 documents
Optimizing artificial neural networks for the evaluation of asphalt pavement structural performance
2019
Artificial Neural Networks represent useful tools for several engineering issues. Although they were adopted in several pavement-engineering problems for performance evaluation, their application on pavement structural performance evaluation appears to be remarkable. It is conceivable that defining a proper Artificial Neural Network for estimating structural performance in asphalt pavements from measurements performed through quick and economic surveys produces significant savings for road agencies and improves maintenance planning. However, the architecture of such an Artificial Neural Network must be optimised, to improve the final accuracy and provide a reliable technique for enriching d…
Increasing the Use of Reclaimed Asphalt in Italy towards a Circular Economy: A Top-Down Approach
2022
This contribution concerns recommendations which could be made to Italian regulatory bodies to improve their use of reclaimed asphalt (RA) in the road engineering sector. It is essential for the use of RA to be established as a standard practice since it has been proven that it can serve as an end-of-waste product that complies with the principles of a circular economy within both an open- and a closed-loop approach [1,2]. Several aspects will be covered, starting with an analysis of European nations whose economies can be classed as “more circular” compared to Italy’s. This refers to nations which have a high usage of RA. Furthermore, nations which have clear regulatory guidelines on the u…
Palladium-Catalyzed Direct Arylation of Heteroaromatics with Activated Aryl Chlorides Using a Sterically Relieved Ferrocenyl-Diphosphane
2012
International audience; The palladium-catalyzed direct arylations at C3 or C4 positions of heteroaromatics are known to be more challenging than at C2 or C5 positions. Aryl chlorides are also challenging substrates for direct arylation of heteroaromatics. We observed that in the presence of a palladium-catalyst combining only 0.5 mol % of Pd(OAc)2 with the sterically relieved new ferrocenyl diphosphane Sylphos, the direct arylation at C3 or C4 of oxazoles, a benzofuran, an indole, and a pyrazole was found to proceed in moderate to high yields using a variety of electron deficient aryl chlorides. Turnover numbers up to 176 have been obtained with this catalyst. Assessment of the electron-don…
Analisi di funzionalità delle rotatorie a fiore
2012
Le attività di ricerca inerenti la geometria dei nodi viari, svolte soprattutto in Enti di ricerca europei, in tempi relativamente recenti hanno consentito di ideare nuove tipologie di intersezioni stradali che presentano un indubbio interesse, soprattutto in termini di funzionalità e di sicurezza della circolazione. Tra le soluzioni più interessanti si annoverano gli schemi affini alle tradizionali rotatorie come ad esempio le rotatorie a spirale, le turbo rotatorie e le rotatorie a fiore. Pur trattandosi di soluzioni con circolazione rotatoria, in genere negli schemi di nuova concezione le modalità di regolamentazione dei flussi veicolari risultano assai diverse rispetto a quanto avviene …
A 1 60163 Tornado: la nuova locomotiva a vapore inglese
2009
Descrizione del progetto, della costruzione e dei primi mesi di esercizio di una locomotiva a vapore di nuova costruzione
A LOGISTICS PATTERN FOR FRUIT AND VEGETABLE TRANSPORTATION FROM ISLAND REGION: THE CASE OF SICILY
2014
The globalization of markets regards many sectors in the E.U. and among them also the fruit and vegetable in the face of growing and increasingly intense competition exerted by the products of countries with emerging economies. But, at the same time, the globalization can also lead to the opening of new potential markets for the products, when and where the transport system, more than other things, appears to be efficient and effective and makes possible to reach the target markets in the shortest time possible and at the lowest possible cost. It is therefore very useful to create a model that takes into account hepeculiarities of the different modes of transport between the different origi…
A new methodology to estimate deformation of longitudinal safety barriers
2013
The correct sizing of storage areas in the port areas is aimed to optimizing the management of intermodal transport and to ensure efficiency and functionality to the entire port system. In this paper is proposed a simulation model for design the port storage areas taking into account many parameters like: the service time, the randomness of the arrivals process, the storage capacity in terms of TEU that can be stored (and handled) in the unit of time. The capacity of the terminal warehouse is determined by the interrelation between fixed and static parameters in the short period which are: i) the extension of the storage area; ii) the height of the overlapping batteries of container (define…
Domain wall motion in a diffusive weak ferromagnet
2019
We study the domain wall motion in a disordered weak ferromagnet, induced by injecting a spin current from a strong ferromagnet. Starting from the spin diffusion equation describing the spin accumulation in the weak ferromagnet, we calculate the force and torque acting on the domain wall. We also study the ensuing domain wall dynamics, and suggest a possible measurement method for detecting the domain wall motion via measuring the additional resistance.
Magneto-Structural Properties and Theoretical Studies of a Family of Simple Heterodinuclear Phenoxide/Alkoxide Bridged MnIIILnIII Complexes : On the …
2018
A family of MnIIILnIII strictly dinuclear complexes of general formula [MnIII(μ-L)(μ-OMe)(NO3)LnIII(NO3)2(MeOH)] (LnIII = Gd, Dy, Er, Ho) has been assembled in a one pot synthesis from a polydentate, multipocket aminobis(phenol)ligand [6,6'-{(2-(1-morpholyl)ethylazanediyl)bis(methylene)}bis(2-methoxy-4-methylphenol)], Mn(NO3)2·4H2O, Ln(NO3)3· nH2O, and NEt3 in MeOH. These compounds represent the first examples of fully structurally and magnetically characterized dinuclear MnIIILnIII complexes. Single X-ray diffraction studies reveal that all complexes are isostructural, consisting of neutral dinuclear molecules where the MnIII and LnIII metal ions, which exhibit distorted octahedral MnN2O4 …
The Role of Orbital Symmetries in Enforcing Ferromagnetic Ground State in Mixed Radical Dimers
2018
One of the first steps in designing ferromagnetic (FM) molecular materials of p-block radicals is the suppression of covalent radical-radical interactions that stabilize a diamagnetic ground state. In this contribution, we demonstrate that FM coupling between p-block radicals can be achieved by constructing mixed dimers from different radicals with differing symmetries of their singly occupied molecular orbitals. The applicability of this approach is demonstrated by studying magnetic interactions in organic radical dimers built from different derivatives of the well-known phenalenyl radical. The calculated enthalpies of dimerization for different homo- and heterodimers show that the formati…