16 results on '"Marina Dolfin"'
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2. A critical analysis towards research perspectives
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Marina Dolfin, Nisrine Outada, and Leone Leonida
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First line ,media_common.quotation_subject ,Active particles ,General Physics and Astronomy ,Human behavior ,01 natural sciences ,Epistemology ,Focus (linguistics) ,010101 applied mathematics ,03 medical and health sciences ,Presentation ,0302 clinical medicine ,Artificial Intelligence ,Section (archaeology) ,Sociology ,0101 mathematics ,General Agricultural and Biological Sciences ,Look-ahead ,030217 neurology & neurosurgery ,media_common - Abstract
We take advantage of the challenging comments to the modeling approach we proposed in [35] to look ahead at a number of applications of the methods to the alternative questions these comments raise. In turn, our effort results in a number of interesting and valuable research perspectives. The presentation goes along three main lines. In the first line, we summarize briefly the aims and results in [35]. In the second section we give a technical the issues raised and, finally, the focus moves to the above mentioned research perspectives.
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- 2017
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3. A Kinetic Theory Model of the Dynamics of Liquidity Profiles on Interbank Networks
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Eleonora Muzzupappa, Leone Leonida, and Marina Dolfin
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Physics and Astronomy (miscellaneous) ,Computer science ,KTAP ,liquidity ,interbank networks ,regulatory policies ,General Mathematics ,Stability (learning theory) ,Strategic Network Formation ,02 engineering and technology ,01 natural sciences ,Measure (mathematics) ,Basel III ,0202 electrical engineering, electronic engineering, information engineering ,Computer Science (miscellaneous) ,Econometrics ,0101 mathematics ,Stylized fact ,Overnight rate ,lcsh:Mathematics ,010102 general mathematics ,Financial market ,lcsh:QA1-939 ,Market liquidity ,Chemistry (miscellaneous) ,020201 artificial intelligence & image processing - Abstract
This paper adopts the Kinetic Theory for Active Particles (KTAP) approach to model the dynamics of liquidity profiles on a complex adaptive network system that mimic a stylized financial market. Individual incentives of investors to form or delete a link is driven, in our modelling framework, by stochastic game-type interactions modelling the phenomenology related to policy rules implemented under Basel III, and it is exogeneously and dynamically influenced by a measure of overnight interest rate. The strategic network formation dynamics that emerges from the introduced transition probabilities modelling individual incentives of investors to form or delete links, provides a wide range of measures using which networks might be considered “best” from the point of view of the overall welfare of the system. We use the time evolution of the aggregate degree of connectivity to measure the time evolving network efficiency in two different scenarios, suggesting a first analysis of the stability of the arising and evolving network structures.
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- 2021
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4. A Microscopic Model of Redistribution of Individuals Inside an ‘Elevator’
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Mirosław Lachowicz, Andreas Schadschneider, and Marina Dolfin
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Physics ,Mesoscopic physics ,Elevator ,fungi ,Markov jump process ,Individuals ,A domain ,food and beverages ,Microscopic model ,Markov jump processes ,Mathematics (all) ,Redistribution (chemistry) ,Statistical physics ,Computer Science::Databases - Abstract
We present and qualitatively analyze a stochastic microscopic model of redistribution of individuals inside a domain which can be thought as representing an elevator. The corresponding mesoscopic model is also derived.
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- 2018
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5. Modeling human behavior in economics and social science
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Leone Leonida, Marina Dolfin, and N. Outada
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Computer science ,Economics ,kinetic models ,General Physics and Astronomy ,Social Sciences ,Socio-economic systems ,Human behavior ,01 natural sciences ,Active particles ,03 medical and health sciences ,0302 clinical medicine ,Artificial Intelligence ,Selection (linguistics) ,Humans ,Computer Simulation ,0101 mathematics ,socio-economic systems ,Behavior ,Kinetic models ,Management science ,Models, Theoretical ,Human behaviors ,010101 applied mathematics ,Kinetics ,active particles ,General Agricultural and Biological Sciences ,030217 neurology & neurosurgery ,Mathematics - Abstract
The complex interactions between human behaviors and social economic sciences is critically analyzed in this paper in view of possible applications of mathematical modeling as an attainable interdisciplinary approach to understand and simulate the aforementioned dynamics. The quest is developed along three steps: Firstly an overall analysis of social and economic sciences indicates the main requirements that a contribution of mathematical modeling should bring to these sciences; subsequently the focus moves to an overview of mathematical tools and to the selection of those which appear, according to the authors bias, appropriate to the modeling; finally, a survey of applications is presented looking ahead to research perspectives.
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- 2017
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6. Boundary conditions for first order macroscopic models of vehicular traffic in the presence of tollgates
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Marina Dolfin
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Computational Mathematics ,Nonlinear system ,Microscopic traffic flow model ,Flow (mathematics) ,Computer science ,Applied Mathematics ,Applied mathematics ,Domain decomposition methods ,Boundary value problem ,Traffic flow ,First order ,macro-models ,nonlinearity ,flow dynamics ,Simulation - Abstract
This paper presents a new approach to the modeling of boundary conditions for first order models of vehicular traffic in highways. The first step consists in deriving a model for the dynamics of the flow of vehicles. Simulations of the parameters lead to a detailed analysis of the qualitative properties of the model. Subsequently, for such model, the statement of initial-boundary value problems is deduced, with domain decomposition, for a tract of highway between tollgates.
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- 2014
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7. Forecasting Efficient Risk/Return Frontier for Equity Risk with a KTAP Approach—A Case Study in Milan Stock Exchange
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Leone Leonida, Marina Dolfin, and Eleonora Muzzupappa
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Efficient frontier ,kinetic theory ,CVaR ,Physics and Astronomy (miscellaneous) ,Computer science ,General Mathematics ,02 engineering and technology ,01 natural sciences ,Order (exchange) ,Stock exchange ,0202 electrical engineering, electronic engineering, information engineering ,Computer Science (miscellaneous) ,Econometrics ,0101 mathematics ,Equity risk ,CVAR ,lcsh:Mathematics ,Variance (accounting) ,lcsh:QA1-939 ,010101 applied mathematics ,Chemistry (miscellaneous) ,Portfolio ,020201 artificial intelligence & image processing ,Portfolio optimization - Abstract
We introduce and discuss a dynamics of interaction of risky assets in a portfolio by resorting to methods of statistical mechanics developed to model the evolution of systems whose microscopic state may be augmented by variables which are not mechanical. Statistical methods are applied in the present paper in order to forecast the dynamics of risk/return efficient frontier for equity risk. Specifically, we adopt the methodologies of the kinetic theory for active particles (KTAP) with stochastic game-type interactions and apply the proposed model to a case study analyzing a subset of stocks traded in Milan Stock Exchange. In particular, we evaluate the efficient risk/return frontier within the mean/variance portfolio optimization theory for 13 principal components of the Milan Stock Exchange and apply the proposed kinetic model to forecast its short-term evolution (within one year). The model has the aim to pave the way to many different research perspectives and applications discussed eventually in the paper. In particular, the case of efficient frontier obtained by minimizing the Conditional Value-at-Risk (CVaR) is introduced and a preliminary result is proposed.
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- 2019
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8. Approximate smooth solutions of a mathematical model for the activation and clonal expansion of T cells
- Author
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D. Criaco, Marina Dolfin, and Liliana Restuccia
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Thermodynamic theory of fluid mixtures ,proliferative events ,approximate smooth solutions ,perturbative methods ,T-Lymphocytes ,Perturbation (astronomy) ,Lymphocyte Activation ,Models, Biological ,Antigen challenge ,Animals ,Humans ,Antigens ,Cell Proliferation ,Physics ,Continuum mechanics ,Applied Mathematics ,Mathematical analysis ,Single type ,Biological Transport ,General Medicine ,Burgers' equation ,Computational Mathematics ,Modeling and Simulation ,Mutation ,Lymphocyte activation ,Thermodynamics ,General Agricultural and Biological Sciences ,Convection–diffusion equation ,Algorithms ,Mathematics - Abstract
In a previous paper a mathematical model was developed for the dynamics of activation and clonal expansion of T cells during the immune response to a single type of antigen challenge, constructed phenomenologically in the macroscopic framework of a thermodynamic theory of continuum mechanics for reacting and proliferating fluid mixtures. The present contribution deals with approximate smooth solutions, called asymptotic waves, of the system of PDEs describing the introduced model, obtained using a suitable perturbative method. In particular, in the one-dimensional case, after deriving the expression of the velocity along the characteristic rays and the equation of the wave front, the transport equation for the first perturbation term of the asymptotic solution is obtained. Finally, it is shown that this transport equation can be reduced to an equation similar to Burgers equation.
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- 2013
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9. Escaping the trap of 'blocking': a kinetic model linking economic development and political competition
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Marina Dolfin, Damián Alejandro Knopoff, Leone Leonida, and D. Maimone Ansaldo Patti
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Physics - Physics and Society ,Matemáticas ,Political economy, technological innovation, political competition, interacting subpopulations, kinetic theory ,FOS: Physical sciences ,Physics and Society (physics.soc-ph) ,Economía y Negocios ,01 natural sciences ,Backwardness ,Matemática Pura ,010305 fluids & plasmas ,purl.org/becyt/ford/1 [https] ,CIENCIAS SOCIALES ,Competition (economics) ,FOS: Economics and business ,Politics ,technological innovation ,Phenomenon ,0103 physical sciences ,Economics ,Production (economics) ,POLITICAL ECONOMY ,purl.org/becyt/ford/5.2 [https] ,KINETIC THEORY ,0101 mathematics ,Blocking (linguistics) ,Numerical Analysis ,Stylized fact ,purl.org/becyt/ford/5 [https] ,political competition ,INTERACTING SUBPOPULATIONS ,purl.org/becyt/ford/1.1 [https] ,Economic liberalization ,interacting subpopulations ,Neoclassical economics ,Economía, Econometría ,010101 applied mathematics ,Political economy ,Modeling and Simulation ,kinetic theory ,POLITICAL COMPETITION ,Quantitative Finance - General Finance ,General Finance (q-fin.GN) ,TECHNOLOGICAL INNOVATION ,CIENCIAS NATURALES Y EXACTAS - Abstract
In this paper we present a kinetic model with evolutive stochastic game-type interactions, analyzing the relationship between the level of political competition in a society and the degree of economic liberalization. The above issue regards the complex interactions between economy and institutional policies intended to introduce technological innovations in a society, where technological innovations are intended in a broad sense comprehending reforms critical to production [3]. A special focus is placed on the political replacement effect described in a macroscopic model by Acemoglu and Robinson (AR-model [1], henceforth), which can determine the phenomenon of innovation 'blocking', possibly leading to economic backwardness. One of the goals of our modelization is to obtain a mesoscopic dynamical model whose macroscopic outputs are qualitatively comparable with stylized facts of the AR-model and the comparison is settled in a number of case studies. A set of numerical solutions is presented showing the non monotonous relationship between economic liberalization and political competition in particular conditions, which can be considered as an emergent phenomenon of the analyzed complex socioeconomic interaction dynamics. Fil: Dolfin, M.. Universita Degli Studi Di Messina; Italia Fil: Knopoff, Damián Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina Fil: Leonida, L.. University College London; Estados Unidos Fil: Maimone Ansaldo Patti, D.. Universita Degli Studi Di Messina; Italia
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- 2016
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10. On the complex interaction between social sciences and crowd dynamics
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Marina Dolfin
- Subjects
Crowd dynamics ,Operations research ,business.industry ,Big data ,General Physics and Astronomy ,Crisis management ,01 natural sciences ,Data science ,Crowding ,010101 applied mathematics ,03 medical and health sciences ,0302 clinical medicine ,Artificial Intelligence ,0101 mathematics ,General Agricultural and Biological Sciences ,business ,Psychology ,030217 neurology & neurosurgery - Published
- 2016
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11. Learning and dynamics in social systems
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Marina Dolfin
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business.industry ,Active particles ,General Physics and Astronomy ,Collaborative learning ,01 natural sciences ,010101 applied mathematics ,03 medical and health sciences ,0302 clinical medicine ,Artificial Intelligence ,Social system ,Dynamics (music) ,Kinetic theory of gases ,Artificial intelligence ,0101 mathematics ,General Agricultural and Biological Sciences ,business ,Psychology ,030217 neurology & neurosurgery - Published
- 2016
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12. How far systems biology methods can contribute to understand social systems?
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Marina Dolfin
- Subjects
Cognitive science ,Artificial Intelligence ,Social system ,Systems biology ,General Physics and Astronomy ,Computational biology ,Biology ,General Agricultural and Biological Sciences ,Mathematics - Published
- 2015
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13. KAOS: A Kinetic Theory Tool for Modeling Complex Social Systems
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Antonio Puliafito, Marco Scarpa, Dario Bruneo, Marina Dolfin, and Francesco Longo
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Theoretical computer science ,Differential equation ,Computer science ,Process (engineering) ,Management science ,010102 general mathematics ,01 natural sciences ,010101 applied mathematics ,lcsh:TA1-2040 ,Social system ,Kinetic theory of gases ,Transient (computer programming) ,0101 mathematics ,KAOS ,lcsh:Engineering (General). Civil engineering (General) ,Representation (mathematics) ,Implementation - Abstract
The kinetic theory approach is successfully used to model complex phenomena related to social systems, allowing to predict the dynamics and emergent behavior of large populations of agents. In particular, kinetic theory for active particles (KTAP) models are usually analyzed by numerically solving the underlying Boltzmann-type differential equations through ad-hoc implementations. In this paper, we present KAOS: a kinetic theory of active particles modeling and analysis software tool. To the best of our knowledge, KAOS represents the first attempt to design and implement a comprehensive tool that assists the user in all the steps of the modeling process in the framework of the kinetic theories, from the model definition to the representation of transient solutions. To show the KAOS features, we present a new model capturing the competition/cooperation dynamics of a socio-economic system with welfare dynamics, in different socio-political conditions
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- 2016
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14. Uniform Materials and the Multiplicative Decomposition of the Deformation Gradient in Finite Elasto-Plasticity
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Serge Preston, Mauro Francaviglia, Marina Dolfin, and Vincenzo Ciancio
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Physics ,Condensed Matter - Materials Science ,Work (thermodynamics) ,Yield (engineering) ,Internal energy ,Mathematical analysis ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,General Physics and Astronomy ,General Chemistry ,Dissipation ,Plasticity ,Condensed Matter - Other Condensed Matter ,Finite strain theory ,Metric (mathematics) ,Dissipative system ,Other Condensed Matter (cond-mat.other) - Abstract
In this work we analyze the relation between the multiplicative decomposition $\mathbf F=\mathbf F^{e}\mathbf F^{p}$ of the deformation gradient as a product of the elastic and plastic factors and the theory of uniform materials. We prove that postulating such a decomposition is equivalent to having a uniform material model with two configurations - total $\phi$ and the inelastic $\phi_{1}$. We introduce strain tensors characterizing different types of evolutions of the material and discuss the form of the internal energy and that of the dissipative potential. The evolution equations are obtained for the configurations $(\phi,\phi_{1})$ and the material metric $\mathbf g$. Finally the dissipative inequality for the materials of this type is presented.It is shown that the conditions of positivity of the internal dissipation terms related to the processes of plastic and metric evolution provide the anisotropic yield criteria.
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- 2008
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15. Thermodynamic transformations in magnetically polarizable undeformable media
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Marina Dolfin, Mauro Francaviglia, Vincenzo Ciancio, and Patrizia Rogolino
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Physics ,Polarizability ,General Physics and Astronomy ,Thermodynamics ,General Chemistry - Published
- 2001
16. A Geometrie Perspective on Irreversible Thermodynamics with Internal Variables
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Mauro Francaviglia, Patrizia Rogolino, and Marina Dolfin
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Physics ,Perspective (graphical) ,General Physics and Astronomy ,Internal variable ,Non-equilibrium thermodynamics ,Thermodynamics ,General Chemistry ,Extended irreversible thermodynamics - Published
- 1998
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