Second-order cybernetics and enactive perception

Purpose - To present an account of cognition integrating second-order cybernetics (SOC) together with enactive perception and dynamic systems theory. Design/methodology/approach - The paper presents a brief critique of classical models of cognition then outlines how integration of SOC, enactive perception and dynamic systems theory can overcome some weaknesses of the classical paradigm. Findings - Presents the critique of evolutionary robotics showing how the issues of teleology and autonomy are left unresolved by this paradigm although their solution fits within the proposed framework. Research limitations/implications - The paper highlights the importance of genuine autonomy in the development of artificial cognitive systems. It sets out a framework within which the robofic research of cognitive systems could succeed. Practical implications - There are no immediate practical implications but see research implications. Originality/value - It joins the discussion on the fundamental nature of cognitive systems and emphasise the importance of autonomy and embodiment.

The philosophy of W. Ross Ashby and its relationship to 'The Matrix'

Ashby was a keen observer of the world around him, as per his technological and psychiatrical developments. Over the years, he drew numerous philosophical conclusions on the nature of human intelligence and the operation of the brain, on artificial intelligence and the thinking ability of computers and even on science in general. In this paper, the quite profound philosophy espoused by Ashby is considered as a whole, in particular in terms of its relationship with the world as it stands now and even in terms of scientific predictions of where things might lead. A meaningful comparison is made between Ashby's comments and the science fiction concept of 'The Matrix' and serious consideration is given as to how much Ashby's ideas lay open the possibility of the matrix becoming a real world eventuality.

Tendering: optimization and rationality

There have been various techniques published for optimizing the net present value of tenders by use of discounted cash flow theory and linear programming. These approaches to tendering appear to have been largely ignored by the industry. This paper utilises six case studies of tendering practice in order to establish the reasons for this apparent disregard. Tendering is demonstrated to be a market orientated function with many subjective judgements being made regarding a firm's environment. Detailed consideration of 'internal' factors such as cash flow are therefore judged to be unjustified. Systems theory is then drawn upon and applied to the separate processes of estimating and tendering. Estimating is seen as taking place in a relatively sheltered environment and as such operates as a relatively closed system. Tendering, however, takes place in a changing and dynamic environment and as such must operate as a relatively open system. The use of sophisticated methods to optimize the value of tenders is then identified as being dependent upon the assumption of rationality, which is justified in the case of a relatively closed system (i.e. estimating), but not for a relatively open system (i.e. tendering).

Stable Nonlinear Receding Horizon Regulator Using RBF Neural Network Models

The general stability theory of nonlinear receding horizon controllers has attracted much attention over the last fifteen years, and many algorithms have been proposed to ensure closed-loop stability. On the other hand many reports exist regarding the use of artificial neural network models in nonlinear receding horizon control. However, little attention has been given to the stability issue of these specific controllers. This paper addresses this problem and proposes to cast the nonlinear receding horizon control based on neural network models within the framework of an existing stabilising algorithm.

Effects of allometry, productivity and lifestyle on rates and limits of body size evolution

Body size affects nearly all aspects of organismal biology, so it is important to understand the constraints and dynamics of body size evolution. Despite empirical work on the macroevolution and macroecology of minimum and maximum size, there is little general quantitative theory on rates and limits of body size evolution. We present a general theory that integrates individual productivity, the lifestyle component of the slow–fast life-history continuum, and the allometric scaling of generation time to predict a clade's evolutionary rate and asymptotic maximum body size, and the shape of macroevolutionary trajectories during diversifying phases of size evolution. We evaluate this theory using data on the evolution of clade maximum body sizes in mammals during the Cenozoic. As predicted, clade evolutionary rates and asymptotic maximum sizes are larger in more productive clades (e.g. baleen whales), which represent the fast end of the slow–fast lifestyle continuum, and smaller in less productive clades (e.g. primates). The allometric scaling exponent for generation time fundamentally alters the shape of evolutionary trajectories, so allometric effects should be accounted for in models of phenotypic evolution and interpretations of macroevolutionary body size patterns. This work highlights the intimate interplay between the macroecological and macroevolutionary dynamics underlying the generation and maintenance of morphological diversity.

Quantized fields and gravitational particle creation in f (R) expanding universes

The problem of cosmological particle creation for a spatially flat, homogeneous and isotropic universes is discussed in the context of f (R) theories of gravity. Different from cosmological models based on general relativity theory, it is found that a conformal invariant metric does not forbid the creation of massless particles during the early stages (radiation era) of the universe. (C) 2010 Elsevier B.V. All rights reserved.

Critical behavior of a contact process with aperiodic transition rates

We performed Monte Carlo simulations to investigate the steady-state critical behavior of a one-dimensional contact process with an aperiodic distribution of rates of transition. As in the presence of randomness, spatial fluctuations can lead to changes of critical behavior. For sufficiently weak fluctuations, we give numerical evidence to show that there is no departure from the universal critical behavior of the underlying uniform model. For strong spatial fluctuations, the analysis of the data indicates a change of critical universality class.

Shared information in stationary states at criticality

We consider bipartitions of one-dimensional extended systems whose probability distribution functions describe stationary states of stochastic models. We define estimators of the information shared between the two subsystems. If the correlation length is finite, the estimators stay finite for large system sizes. If the correlation length diverges, so do the estimators. The definition of the estimators is inspired by information theory. We look at several models and compare the behaviors of the estimators in the finite-size scaling limit. Analytical and numerical methods as well as Monte Carlo simulations are used. We show how the finite-size scaling functions change for various phase transitions, including the case where one has conformal invariance.

Cellular automaton model for molecular traffic jams

We consider the time evolution of an exactly solvable cellular automaton with random initial conditions both in the large-scale hydrodynamic limit and on the microscopic level. This model is a version of the totally asymmetric simple exclusion process with sublattice parallel update and thus may serve as a model for studying traffic jams in systems of self-driven particles. We study the emergence of shocks from the microscopic dynamics of the model. In particular, we introduce shock measures whose time evolution we can compute explicitly, both in the thermodynamic limit and for open boundaries where a boundary-induced phase transition driven by the motion of a shock occurs. The motion of the shock, which results from the collective dynamics of the exclusion particles, is a random walk with an internal degree of freedom that determines the jump direction. This type of hopping dynamics is reminiscent of some transport phenomena in biological systems.

Paper surfaces and dynamical limits

It is very common in mathematics to construct surfaces by identifying the sides of a polygon together in pairs: For example, identifying opposite sides of a square yields a torus. In this article the construction is considered in the case where infinitely many pairs of segments around the boundary of the polygon are identified. The topological, metric, and complex structures of the resulting surfaces are discussed: In particular, a condition is given under which the surface has a global complex structure (i.e., is a Riemann surface). In this case, a modulus of continuity for a uniformizing map is given. The motivation for considering this construction comes from dynamical systems theory: If the modulus of continuity is uniform across a family of such constructions, each with an iteration defined on it, then it is possible to take limits in the family and hence to complete it. Such an application is briefly discussed.

Nuets förnöjsamhet : en grundad teori om livsval och överlevnadsstrategier

Contentment in the moment ”Contentment in the moment” is a classic grounded theory exploring safety and contentment within a small community in northern Norway. The purpose of the study was to explore the village’s everyday life from a participant’s perspective and to develop an understanding of their living conditions. We found different survival strategies, which have their roots in the village’s history of poverty, isolation and harsh climate. Today these strategies have changed from a matter of life and death to a modern psychosocial foundation of contentment. The study is based on four and a half years of observations, in-depth interviews and informal but focused conversations with people living in Polarfjorden. The data was analysed using the constant comparative method of classic grounded theory. In this article we further relate our work to more general sociological theory, more specifically to Charles Tilly’s work on reason and routines.

Resan till samhället : En kvalitativ utvärderingsstudie av en mottagningsenhet i mellansverige

In present study interviews with five officials and the gathering of documentation carried out in a reception center for newly arrived refugees located in a medium-sized municipality in central Sweden. The aim has been on the basis of the collected empirical data to evaluate how the municipality worked to promote the integration of newcomers, what measures were available, whether there were existing goals, and how they were formulated, and the extent to which they were implemented. This constituted, together with earlier research and systems theory based framework for the study's conclusions. The study showed that communication between and within the investigated unit was partly flawed. It has also showed that there was a degree of conflict in organizational approaches within the examined entity which could cause bottlenecks in the activity. The current study also showed the difficulty in estimating the resources currently needed to cover the need of, among others, Swedish for immigrants.

On equilibrium prices in continuous time

We combine general equilibrium theory and théorie générale of stochastic processes to derive structural results about equilibrium state prices.

A regulação descentralizada da governança corporativa: uma análise da criação dos segmentos de listagem do mercado organizado de valores mobiliários administrado pela Bovespa

O presente trabalho tem como objetivo analisar pela perspectiva da regulação descentralizada a criação dos segmentos de listagem do mercado de valores mobiliários administrado pela Bovespa. O objetivo de analisar a criação dos segmentos de listagem inclui a descrição do fenômeno para apontar fatores que levaram as companhias e controladores a alterarem seus comportamentos e a construção de um argumento normativo formulado a partir do reconhecimento desses fatores. No debate sobre regulação da Governança Corporativa, o conceito de regulação normalmente assume uma definição centrada no Estado. Grande parte da análise da criação dos segmentos de listagem do mercado administrado pela Bovespa seguiu essa perspectiva. A criação dos segmentos de listagem, então, foi classificada como um fenômeno autorregulatório, privado e de mercado. Dessa análise seguiu a formulação de um argumento normativo, o qual prescreveu o uso da autorregulação a atores que visassem estabelecer regras específicas de Governança Corporativa. Contudo, a perspectiva da regulação descentralizada questionou o pressuposto da centralidade do Estado no conceito de regulação. A perspectiva da regulação descentralizada sustentou que não só atores estatais estão cada vez mais envolvidos com atores não estatais em complexas colaborações e delegações para o exercício da regulação, como também sustentou que atores não estatais exercem regulação, incluindo, a formulação, monitoramento e enforcement de regras. Para lidar com essa complexidade dos fenômenos empíricos regulatórios, Julia Black, baseando-se na teoria dos sistemas e na literatura de Governança, formulou o conceito de regulação descentralizada. Pelo conceito de regulação descentralizada, a regulação é exercida por uma rede de atores interdependentes, estatais e não estatais, que utilizam mecanismos legais e extralegais para o exercício do poder e do controle. Diante disso, adotando esse conceito de regulação descentralizada de Julia Black, o presente trabalho pretendeu descrever a criação dos segmentos de listagem e formular um argumento normativo baseado nessa descrição. Como resultado da pesquisa realizada, foi possível concluir que a criação dos segmentos de listagem não se restringiu às partes que celebraram o Contrato de Participação, mas envolveu diversos atores, estatais e não estatais, os quais tinham uma relação de interdependência entre si e compartilharam diversos mecanismos no exercício da regulação. Com isso, não se pode resumir os fatores que fizeram com que companhias e controladores alterassem seus comportamentos e adotassem algumas regras de Governança Corporativa à voluntariedade e ao aspecto autorregulatório. Desta análise segue que, se é possível apontar para um argumento normativo do caso da criação dos segmentos de listagem, o argumento normativo não é a prescrição da autorregulação, mas sim a prescrição do uso do poder regulatório fragmentado entre diversos atores, estatais e não estatais.