1,721,474 research outputs found
Statistical mechanics of socio-economic systems with heterogeneous agents
Full text linkWe review the statistical mechanics approach to the study of the emerging collective behavior of systems of heterogeneous interacting agents. The general framework is presented through examples is such contexts as ecosystem dynamics and traffic modeling. We then focus on the analysis of the optimal properties of large random resource-allocation problems and on Minority Games and related models of speculative trading in financial markets, discussing a number of extensions including multi-asset models, Majority Games and models with asymmetric information. Finally, we summarize the main conclusions and outline the major open problems and limitations of the approach
De Martino e la patologia
No full textLa relazione affronta il problema della patologia e del patologico in De Martino, a partire dagli elementi "patologici" della sua biografia (le malattie anche psicologiche di cui soffrì) fino alla patologia della civiltà europea, da lui teorizzata e analizzata
Calculo de porticos ortogonales con deplazamientos, hasta 110 nodos, , SOFT Biblioteca de programas, Madrid 1981;Faella C., De Martino A., TELGRA – Programma su HP 85/86/87 per il calcolo di telai piani a maglie rettangolari con progetto, verifica e grafica armatura, 1981;
No full textStatistical mechanics of resource allocation
No full textWe sketch the usefulness of spin-glass techniques for the analysis of the macroscopic properties of certain resource allocation problems, focusing in particular on a simple linear production model and on the competitive equilibrium model
Wavevector-dependent spin filtering and spin transport through magnetic barriers in graphene
No full textWe study the spin-resolved transport through magnetic nanostructures in monolayer and bilayer graphene. We take into account both the orbital effect of the inhomogeneous perpendicular magnetic field as well as the in-plane spin splitting due to the Zeeman interaction and to the exchange coupling possibly induced by the proximity of a ferromagnetic insulator. We find that a single barrier exhibits a wavevector-dependent spin filtering effect at energies close to the transmission threshold. This effect is significantly enhanced in a resonant double barrier configuration, where the spin polarization of the outgoing current can be increased up to 100% by increasing the distance between the barriers
Multiple magnetic barriers in graphene
No full textWe study the behavior of charge carriers in graphene in inhomogeneous perpendicular magnetic fields. We consider two types of one-dimensional magnetic profiles, uniform in one direction: a sequence of N magnetic barriers, and a sequence of alternating magnetic barriers and wells. In both cases, we compute the transmission coefficient of the magnetic structure by means of the transfer matrix formalism, and the associated conductance. In the first case the structure becomes increasingly transparent upon increasing N at fixed total magnetic flux. In the second case we find strong wave-vector filtering and resonant effects. We also calculate the band structure of a periodic magnetic superlattice, and find a wave-vector-dependent gap around zero-energy
Programmi di calcolo per i microcomputer HP 67 HP 97 (Telai piani, travi reticolari, serbatoi cilindrici, volte di rivoluzione), Manuale HP, Ing. Civ., Vol. III
No full textProgrammi di calcolo per i micro computer HP 41 C: (Progetto, verifica di sezioni in c.a. alle tensioni ammissibili ed agli stati limite, travi continue, solai), Manuale HP Ing. Strutturale, Vol. I, 1980
No full textProgrammi di calcolo per i microcomputer HP 67 HP 97 (Calcolo agli stati limite di sezioni in c.a., stato limite di fessurazione, stato limite di deformazione), Manuale HP, Ing. Civ., Vol. IV
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