Search results for "system dynamic"
showing 10 items of 256 documents
Obtaining dynamic Norton parameters of a solar panel from manufacturer data
2016
Photovoltaic arrays have been shown to possess significant influence on the dynamic performance of coupled source-converter-load system while its dynamic resistance is the most important parameter, contributing to the overall system dynamics. In this paper, a method of deriving the parameters of linearized photovoltaic equivalent circuit from manufacturer data is proposed. The approach allows predicting the range of dynamic Norton parameters for the expected irradiation and temperature operation conditions thus defining clear bounds required for robust design of the system controller.
Politiche incentivanti, Motivazione delle Risorse Umane e Performance nell’Azienda Pubblica: un approccio di System Dynamics.
2009
Accessibility of Norwegian Municipalities Websites: A Decision Support Tool
2011
Access to public websites is crucial to assure equal opportunities for all citizens to participate in society. Although, a range of studies to analyse the accessibility of websites have been carried out, we have not been able to find any study evaluating the effect of managerial decisions on the accessibility of websites. This paper presents a demonstrator simulation model, built using System Dynamics methodology. The model focuses on accessibility of Norwegian Municipal websites, and is intended to be used as a decision support tool, mainly for managers responsible for website development and maintenance. To build the underlying model we have used information collected from in-depth interv…
PUBLIC POLICY PLANNING TO ENHANCE THE RESILIENCE OF SOCIO-ECOLOGICAL SYSTEMS TO CLIMATE CHANGE: OPERATIONALIZING RESILIENCE CONCEPTS FROM A DYNAMIC P…
This study outlines a system dynamic based approach to the planning for resilience in food systems to climate change. The processes described and the insights gained are novel in the literature since they focus on describing operational aspects of resilience that can be generalized to multiple contexts and problems. On the one hand, the process described offers an aid for researchers and practitioners operationalizing resilience in public sector settings. Simultaneously, the insights gained from multiple stakeholder discussions and modelling work open new questions regarding the general mechanisms driving resilience in food systems. Climate change is threatening the extent to which social, …
Exploring intellectual capital in a call centre through a 'system dynamics' resource based view
2008
This paper examines alternative Intellectual Capital (IC) investment policies in a dynamically com plex system in order to explain differences in firm performance. The analysis is supported through the use of a System Dynamics (SD) simulation model. This paper is based on the hypothesis that in order to explain superior performance, it is not sufficient to look at the endowment of strategic resources; it also requires an analysis of the dynamics of resource accumulation and depletion processes, which stem from management policies. To assess the impact of ICon company performance, a conceptual framework and an SD simulation model are developed. Finally, the results from alternative scenario…
Temperature effects on quantum non-Markovianity via collision models
2018
Quantum non-Markovianity represents memory during the system dynamics, which is typically weakened by the temperature. We here study the effects of environmental temperature on the non-Markovianity of an open quantum system by virtue of collision models. The environment is simulated by a chain of ancillary qubits that are prepared in thermal states with a finite temperature $T$. Two distinct non-Markovian mechanisms are considered via two types of collision models, one where the system $S$ consecutively interacts with the ancillas and a second where $S$ collides only with an intermediate system $S'$ which in turn interacts with the ancillas. We show that in both models the relation between …
A synthesis of feasible control methods for floating offshore wind turbine system dynamics
2021
Abstract During the past decade, the development of offshore wind energy has transitioned from near shore with shallow water to offshore middle-depth water regions. Consequently, the energy conversion technology has shifted from bottom-fixed wind turbines to floating offshore wind turbines. Floating offshore wind turbines are considered more suitable, but their cost is still very high. One of the main reasons for this is that the system dynamics control method is not well-adapted, thereby affecting the performance and reliability of the wind turbine system. The additional motion of the platform tends to compromise the system’s performance in terms of power maximization, power regulation, an…
The Retirement and Early Retirement in Italy: a System Dynamics approach
2006
The main aim of this study is underline that System Dynamics approach allows the building of a general framework in which psychological, economic, social, legal and organizational variables converge to describe the retirement behaviour and its main unintended consequences. It’s emphasized that organizational commitment and psychological contract breach play a considerable role in the dynamics of retirement behaviour. In the first part of this paper, an analysis of main contributions in the retirement and early retirement fields is outlined. Further, the psychological, social, economical and legal approach to retirement behaviour is also briefly remarked. In the second part, retirement pheno…
Managing for resilience: an information theory-based approach to assessing ecosystems
2016
Ecosystems are complex and multivariate; hence, methods to assess the dynamics of ecosystems should have the capacity to evaluate multiple indicators simultaneously. Most research on identifying leading indicators of regime shifts has focused on univariate methods and simple models which have limited utility when evaluating real ecosystems, particularly because drivers are often unknown. We discuss some common univariate and multivariate approaches for detecting critical transitions in ecosystems and demonstrate their capabilities via case studies. Synthesis and applications. We illustrate the utility of an information theory-based index for assessing ecosystem dynamics. Trends in this inde…
Perturbative Treatment of the Evolution Operator Associated with Raman Couplings
2006
A novel perturbative treatment of the time evolution operator of a quantum system is applied to the model describing a Raman-driven trapped ion in order to obtain a suitable 'effective model'. It is shown that the associated effective Hamiltonian describes the system dynamics up to a certain transformation which may be interpreted as a 'dynamical dressing' of the effective model.