Self-adaptive systems are distributed computing systems that can adapt their behavior and structure to different kinds of conditions. This adaptation does not concern the single components only, but the entire system. In a previous work we have identified several patterns for self-adaptation, classifying them by means of a taxonomy, which aims at being a support for developers of self-adaptive ...

The main aim of this research is to provide children who have an early language delay with an adaptive way to train their vocabulary taking into account individuality of the learner. The suggested system is a mobile game-based learning environment which provides simple tasks where the learner chooses a picture that corresponds to a played back sound from multiple pictures presented on the scree...

Huddling is a grouping behavior where animals maintain close bodily contact and save energy. We tested the hypothesis that this thermoregulatory behavior behaves as a system with continuous (second-order phase) transition called critical when the environmental temperature (driving parameter) is near a critical value. To do so, we followed theoretical and experimental approaches, examining data ...

How can we treat science as an object of scientific inquiry? The central problem arises with that question. Science has tried to rid itself of circularity and in so doing has become a very limited method for examining the complex world it tries to have us understand. Self reference is at the center of so many of the interesting thing we want to understand including and especially life itself. T...

The characteristics of self-organising, adaptive systems (SOAS) lead to a signi cantly higher exibility and robustness against an ever-changing environment. This exibility makes it hard to test these systems adequately, which is, however, inevitable in order to assure their quality. As a part of our vision of testing SOAS, we present a framework for testing selforganisation (SO) algorithms. The...

Adaptive identification and control algorithms can exhibit local instability when certain ideal assumptions, such as satisfaction of SPR conditions, are violated. However, recent conjectures suggest that due to a “self-stabilization” mechanism, global boundedness may still hold despite local instabilities. We present counterexamples to these conjectures, showing that self stabilization is bypas...

In this paper, I analyze the organization of tasks or activities by a collection of agents. I begin by formally defining organized collections and robustly organized collections of agents in the context of a simple model. Within this framework, I demonstrate that organized collections and robustly organized collections exist and equilibria need not be organized. I then test whether adaptive age...

Self-organization in macromolecular systems refers to the transition from a random assembly of interacting oligomers to a system of stable heteropolymers. The concept of adaptive value describes the correlation between environmental variability and the variability in replication and mutation rates of the interacting oligomers. This paper describes a model of self-organization in macromolecular ...

This paper presents fuzzy and conventional performance of model reference adaptive control(MRAC) to control a DC drive. The aims of this work are achieving better match of motor speed with reference speed, decrease of noises under load changes and disturbances, and increase of system stability. The operation of nonadaptive control and the model reference of fuzzy and conventional adaptive contr...

Purpose – This paper seeks to investigate the influence of the external environment on the choice of strategic management activities, from a chaos and complexity perspective, since a business environment is a complex adaptive system. Design/methodology/approach – The study in this paper was of an exploratory nature, using the qualitative techniques of case study, depth interviews and document a...