Search results for "system dynamic"

Dealing with the Public Debt Burden. A system dynamics approach to implementing sustainable financial policies in the Italian State

2012

In the last decades in several mature democracies the problem of debt emerged as a violation of intergenerational equal treatment due to high expenditures concentration and dilution of costs by mean of debt creation. So far this issue has been analyzed from a statistical and a socio-economic perspective, which identified the high political interference as the main dysfunction of country debt management. There are no studies which frame the issue by focusing on State institutions as performance-oriented organizations, according to this perspective such organizations have to respect dynamically trade-off between development and the debt reduction through a mix of levers such as: funds acquisi…

Using System Dynamics to Model Student Performance in an Intelligent Tutoring System

2017

One basic adaptation function of an Intelligent Tutoring System (ITS) consists of selecting the most appropriate next task to be offered to the learner. This decision can be based on estimates, such as the expected performance of the student, or the probability that the student successfully solves each particular task. However, the computation of these values is intrinsically difficult, as they may depend on other complex latent variables that also need to be estimated from observable quantities, e.g. the current student's ability. In this work, we have used system dynamics to model learning and predict the student's performance in a given exercise, in an existing ITS that was developed to …

Dynamic Modeling, Energy Analysis, and Path Planning of Spherical Robots on Uneven Terrains

2020

Spherical robots are generally comprised of a spherical shell and an internal actuation unit. These robots have a variety of applications ranging from search and rescue to agriculture. Although one of the main advantages of spherical robots is their capability to operate on uneven surfaces, energy analysis and path planning of such systems have been studied only for flat terrains. This work introduces a novel approach to evaluate the dynamic equations, energy consumption, and separation analysis of these robots rolling on uneven terrains. The presented dynamics modeling, separation analysis, and energy analysis allow us to implement path planning algorithms to find an optimal path. One of t…

Using a Dynamic Performance Management approach to reinforce the benefits of territorial strategic planning

2013

The purpose of this paper is to present how system dynamics (SD) can be used to enrich performance management in local government and to foster a common shared view of the relevant system’s structure and behavior among stakeholders for territorial strategic planning. We begin by framing how dynamic complexity through SD modeling can support consensus building among different stakeholders within a territory, which moves beyond the traditional view of strategic planning within the context of a single jurisdiction. A Dynamic Performance Management (DPM) approach, as shown by our case-study, may help such players to overcome possible barriers to collaboration because of its support to better de…

Assessing Transfer Entropy in cardiovascular and respiratory time series: A VARFI approach

2021

In the study of complex biomedical systems represented by multivariate stochastic processes, such as the cardiovascular and respiratory systems, an issue of great relevance is the description of the system dynamics spanning multiple temporal scales. Recently, the quantification of multiscale complexity based on linear parametric models, incorporating autoregressive coefficients and fractional integration, encompassing short term dynamics and long-range correlations, was extended to multivariate time series. Within this Vector AutoRegressive Fractionally Integrated (VARFI) framework formalized for Gaussian processes, in this work we propose to estimate the Transfer Entropy, or equivalently G…

A System Dynamics Approach to Analysing the Effect of Clientelism on Public Organizations Performance in Italy

2010

This paper tries to analyse the effects of political clientelism on the performance of public utilities and organizations in Italy. Shortly, clientelism consists in a series of reciprocal convenience-based relationships between politicians and individuals, commanding unequal resources and involving mutually beneficial transactions in terms of economic, social and political consequences. The motivation of this research stems from the fact that analysing the effect of clientelism may contribute in (1) improving the quality of electoral strategies and the resulting public policies and (2) managing the performance of public organizations according to a sustainable perspective. Hence, the key is…

A dynamic model to value the economic impact and the economic sustainability of tourism in a resort area

2007

The systemic approach in studying tourism is firmly accepted in literature because of the complexity of the topic both from the supply side (the heterogeneity of goods and services making the tourism product) and the demand side (not every operator in the tourism network chain has a direct contact with tourists). To face this complexity the Input-Output analysis, theorized by Wassily Leontief, is widely used in empirical studies of tourism. Yet, in spite of such a diffusion and importance in tourism literature, the Input-Output models have several limits. In order to overcome some of these limits, the static Input-Output analysis is translated into a dynamic one by making use of System Dyna…

SYSTEM DYNAMICS MODEL TO HELP DECISION MAKERS IN ADOPTING EFFECTIVE PUBLIC POLICIES AIMED TO PREVENT THE CARDIOVASCULAR DISEASES

2012

The role of system dynamics to unveil the complexity of academic missions. An integrated approach for entrepreneurial universities’ performance evalu…

2023

The third mission concept implies that universities are expected to perform several diversified activities besides teaching (first mission) and scientific research (second mission). Third mission efforts may include activities such as knowledge dissemination, technological innovation, social innovation, advisory services, or entrepreneurship. Through third mission activities, universities engage in sustainable, inclusive development and/or territorial competitiveness by interacting with a wide range of subjects far beyond their students and reference scientific communities. The third mission’s activities vary a lot according to the specific characteristics of each university, the territory …

Composite quantum collision models

2017

A collision model (CM) is a framework to describe open quantum dynamics. In its {\it memoryless} version, it models the reservoir $\mathcal R$ as consisting of a large collection of elementary ancillas: the dynamics of the open system $\mathcal{S}$ results from successive "collisions" of $\mathcal{S}$ with the ancillas of $\mathcal R$. Here, we present a general formulation of memoryless {\it composite} CMs, where $\mathcal S$ is partitioned into the very open system under study $S$ coupled to one or more auxiliary systems $\{S_i\}$. Their composite dynamics occurs through internal $S$-$\{S_i\}$ collisions interspersed with external ones involving $\{S_i\}$ and the reservoir $\mathcal R$. W…