1,721,111 research outputs found
Structurally unstable regular dynamics in 1D piecewise smooth maps, and circle maps
No full textIn this work we consider a simple system of piecewise linear discontinuous 1D map with two discontinuity points: X′ = aX if ∣X∣ z, where a and b can take any real value, and may have several applications. We show that its dynamic behaviors are those of a linear rotation: either periodic or quasiperiodic, and always structurally unstable. A generalization to piecewise monotone functions X′ = F(X) if ∣X∣ z is also given, proving the conditions leading to a homeomorphism of the circle
Il riparto di giurisdizione
No full textSpiegazione dei principi costituzionali sul riparto dui giurisdizione attraverso due sentenze commentat
Sviluppare la Competenza Emotiva. Un percorso psico–educativo nella Scuola dell’infanzia
No full textNumerose indagini trasversali, condotte a livello nazionale e internazionale, hanno prodotto risultati univoci sull’importanza del ruolo giocato dalle componenti emotive nei processi psico-educativi, e in particolare nelle interazioni sociali all’interno del contesto scolastico durante l’infanzia. A partire dall’interesse per lo studio delle emozioni che si è sviluppato nel corso degli anni Sessanta del Novecento, le ricerche empiriche in psicologia si sono focalizzate sullo sviluppo di alcuni costrutti (Intelligenza Emotiva, Consapevolezza Emotiva, Regolazione emozionale, ecc.) tra loro differenti, ma anche in parte affini e sovrapponibili, che emergono nelle diverse fasi evolutive . Si è giunti così a superare progressivamente l’idea che le emozioni siano qualcosa di irrazionale, vedendole invece come una risorsa per l’organizzazione mentale e comportamentale del soggetto. Le abilità emozionali, o competenze emotive, hanno quindi acquisito uno status sempre più rilevante nei quadri teorici che descrivono i processi di adattamento socio-affettivo in età evolutiva
A simple financial market model with chartists and fundamentalists: market entry levels and discontinuities
No full textProceedings of the MDEF (Modelli Dinamici in Economia e Finanza – Dynamic models in economics and finance) workshop, Urbino 6th–8th September 2018
No full textSpeculative behaviour and complex asset price dynamics: A global analysis
No full textThis paper analyses the dynamics of a model of a share market consisting of two groups of traders: fundamentalists, who base their trading decisions on the expectation of a return to the fundamental value of the asset, and chartists, who base their trading decisions on an analysis of past price trends. The model is reduced to a two-dimensional map whose global dynamic behaviour is analysed in detail. The dynamics are affected by parameters measuring the strength of fundamentalist demand and the speed with which chartists adjust their estimate of the trend to past price changes. The parameter space is characterized according to the local stability/instability of the equilibrium point as well as the non-invertibility of the map. The method of critical curves of non-invertible maps is used to understand and describe the range of global bifurcations that can occur. It is also shown how the knowledge of deterministic dynamics uncovered here can aid in understanding the behaviour of stochastic versions of the model. © 2002 Elsevier Science B.V. All rights reserved
A non-autonomous system leading to cyclic chaotic sets to model physiological rhythms
No full textIt is proposed a nonlinear system to model highly complex states of rhythms, whose patterns of activity seem irregular. A non-autonomous system which takes into account both exogenous and endogenous influences. The dynamic behaviors of its stroboscopic map are investigated, by using triangular systems. The model provides a theoretical framework for addressing cyclic transitions between chaotic sets. The analysis underlines the role of the parameters in the structure and shape of the attractors, so to be in agreement with experimental data
One-dimensional maps with two discontinuity points and three linear branches: mathematical lessons for understanding the dynamics of financial markets
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