Search results for "Adaptive system"

A Bacterial-Based Algorithm to Simulate Complex Adaptative Systems

2014

Paper presented at the 13th International Conference on Simulation of Adaptive Behavior which took place at Castellón, Spain in 2014, July 22-25. Bacteria have demonstrated an amazing capacity to overcome envi-ronmental changes by collective adaptation through genetic exchanges. Using a distributed communication system and sharing individual strategies, bacteria propagate mutations as innovations that allow them to survive in different envi-ronments. In this paper we present an agent-based model which is inspired by bacterial conjugation of DNA plasmids. In our approach, agents with bounded rationality interact in a common environment guided by local rules, leading to Complex Adaptive Syste…

Batteries for Aerospace: A Brief Review

2018

This paper presents a brief overview on batteries for aerospace application. In particular, More Electric Aircraft (MEA) and All Electric Aircraft (AEA) concepts are introduced at first, together with their main advantages and drawbacks. Subsequently, opportunities and issues related to the employment of batteries on aircrafts are presented and briefly discussed. Reference is then made to aircraft power system architectures and battery technologies, as well as on the state-of-the-art of battery management systems, state-of-charge and state-of-health estimations, and thermal management.

Modelling complex dynamics and distributed generation of knowledge with bacterial-based algorithms

2014

Este estudio tuvo como objetivo demostrar que las sociedades conectadas y heterogéneas con intercambios entre pares (P2P) son más resilientes que las centralizadas y homogéneas. En el modelado basado en agentes, se modelizan agentes con racionalidad limitada que interactúan en un entorno común guiado por reglas locales, lo que lleva a Sistemas Adaptativos Complejos (CAS) que se denominan 'sociedades artificiales'. Estos modelos simplificados de sociedades humanas crecen de abajo hacia arriba en entornos computacionales y pueden utilizarse como un laboratorio para probar algunas hipótesis. Hemos demostrado que en un modelo basado en interacciones libres entre agentes autónomos, los resultado…

Dual Capability EAM for Agility in Business Capability Building : A Systems Theoretical View

2021

Through two cases of IT-enabled business capability building in large enterprises, this paper elucidates how the systems theory approach can explain the enterprise architecture management (EAM) challenge to support business agility. The observation in both of these cases is that a legacy EAM approach does not adapt to a business development scenario involving agility. This leads to a study of the nature of the challenges in EAM when enabling strategic business moves involving new technologies, at the business unit level. For the type of projects as in these cases, we do not find a fitting paradigm in the EAM literature. Suggested solutions are IT bimodality, or Two Speed IT. However, its co…

A Context-Aware Mobile Solution for Assisting Tourists in a Smart Environment

2017

E-heutagogy for lifelong e-learning

2012

Abstract The paper aims to introduce a new concept: e-heutagogy. This aim is approached through two sub-objectives:a) Giving the rationale for the new concept of e-heutagogy.b) Outlining the features of e-heutagogy necessary for lifelong e-learning.Why do we need a new concept? Learning is a complex concept and it is a part of our entire life. Today we can speak about new generations of learners at all levels, from kindergarten to university, not only due to technology but also due to rapid changes in open, heterogeneous, dynamic and uncertain environments.Taking into account that heutagogy is appropriate to the needs of learners but learners are most of their life without their teachers an…

'Niche Selection' and the evolution of a complex behavior in a changing environment--a simulation.

2000

One of the key problems in theoretical biology is the identification of the mechanisms underlying the evolution of complexity. This paper suggests that some difficulties in current models could be avoided by taking account of “niche selection” as proposed by Waddington [21] and subsequent authors [2]. Computer simulations, in which an evolving population of artificial organisms “selects” the niche(s) that maximize their fitness, are compared with a Control Model in which “Niche Selection” is absent. In the simulations the Niche Selection Model consistently produced a greater number of “fit” organisms than the Control Model; although the Niche Selection Model tended, in general, to produce o…

Community currency (CCs) in Spain: An empirical study of their social effects

2016

Despite its sudden proliferation along the economic crisis period, no previous study has investigated the social effects of the community currency (CCs) experiences in Spain. Previous research on CCs experiences from different countries provided evidences about social capital improvement, introducing CCs as sustainability tools. This research uses the theoretical frameworks of social capital and complex adaptive systems to approach concepts like sustainability, networks, trust, norms, participation and cooperation. Statistical analysis of the data collected in June 2013 through online survey explores social capital and resilience indicators among the Spanish exchange community users, conclu…

Cyber World as a Social System

2015

The increasing applying of information and communication technology is transforming the society into an unknown ground of the continuously evolving cyber world. This challenges the actors of the society and has increased complexity. The purpose of this chapter is to form a hypothesis about how to identify patterns i.e., emergent phenomena about the cyber world for developing security in the society. The cyber world is considered as a complex adaptive system. A system modelling approach to complex adaptive systems is briefly outlined and a social system model of a society is introduced as a content analysis method to complex adaptive systems. The model is populated with a small set of empiri…

Neural based MRAS sensorless techniques for high performance linear induction motor drives.

2010

This paper proposes a neural based MRAS (Model reference Adaptive System) speed observer suited for linear induction motors (LIM). Starting from the dynamical equation of the LIM in the synchronous reference frame in literature, the so-called voltage and current models of the LIM in the stationary reference frame, taking into consideration the end effects, have been deduced. Then, while the inductor equations have been used as reference model of the MRAS observer, the induced part equations have been discretized and rearranged so to be represented by a linear neural network (ADALINE). On this basis, the so called TLS EXIN neuron has been used to compute on-line, in recursive form, the machi…