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American Society for Cybernetics the Heinz Von Foerster Society
American Society for Cybernetics The Warren McCulloch Award of the American Society for Cybernetics is awarded to The Heinz von Foerster Society for an extensive, prolonged, deep and successful commitment to the furtherance of the work of Heinz von Foerster and other cyberneticians concerned with second-order cybernetics and related approaches and understandings. Beginning with a major interview book with Heinz von Foerster (“Der Anfang von Himmel und Erde hat keinen Namen: Eine Selbsterschaffung in sieben Tagen” about to appear in English translation), members of the Heinz for Foerster Society have promoted second order cybernetics in general, and the work of Heinz von Foerster, Gordon Pask, Ernst von Glasersfeld and Richard Jung in particular, in the conferences and lectures they have funded and promoted over the past 10 years. Emerging from their first conference, the book “An Unfinished Revolution” is a key critical and reference work covering the progress so far of second-order cybernetics. Together with the publishers echoraum, they have also published a series of books on mainly second-order cybernetic topics, with authors including ASC members; and recently began a new series with the book “Trojan Horses,” which emerged from the ASC’s 2010 conference held in Troy, NY. The Heinz von Foerstar Society has been successful in directing new public attention to cybernetics in both the English and the German speaking worlds. Theirs is a major contribution to the furtherance of cybernetics, both in terms of public attention and publicity, and in the continuing development of our subject area. Ranulph Glanville President of the American Society for Cybernetics 2013/08/01. -
Control Theory
Control theory S. Simrock DESY, Hamburg, Germany Abstract In engineering and mathematics, control theory deals with the behaviour of dynamical systems. The desired output of a system is called the reference. When one or more output variables of a system need to follow a certain ref- erence over time, a controller manipulates the inputs to a system to obtain the desired effect on the output of the system. Rapid advances in digital system technology have radically altered the control design options. It has become routinely practicable to design very complicated digital controllers and to carry out the extensive calculations required for their design. These advances in im- plementation and design capability can be obtained at low cost because of the widespread availability of inexpensive and powerful digital processing plat- forms and high-speed analog IO devices. 1 Introduction The emphasis of this tutorial on control theory is on the design of digital controls to achieve good dy- namic response and small errors while using signals that are sampled in time and quantized in amplitude. Both transform (classical control) and state-space (modern control) methods are described and applied to illustrative examples. The transform methods emphasized are the root-locus method of Evans and fre- quency response. The state-space methods developed are the technique of pole assignment augmented by an estimator (observer) and optimal quadratic-loss control. The optimal control problems use the steady-state constant gain solution. Other topics covered are system identification and non-linear control. System identification is a general term to describe mathematical tools and algorithms that build dynamical models from measured data. -
Neuerscheinungsdienst 2017 ND 08
Neuerscheinungsdienst Jahrgang: 2017 ND 08 Stand: 22. Februar 2017 Deutsche Nationalbibliothek (Leipzig, Frankfurt am Main) 2017 ISSN 1611-0153 urn:nbn:de:101-201612064955 2 Hinweise Der Neuerscheinungsdienst ist das Ergebnis der Ko- blikation in der Deutschen Nationalbibliografie; de- operation zwischen der Deutschen Nationalbibliothek und taillierte bibliografische Daten sind im Internet über der MVB Marketing- und Verlagsservice des Buchhandels http://dnb.dnb.de abrufbar. GmbH. Ziel dieser Kooperation ist zum einen die Hebung Bibliographic information published by the Deut- des Qualitätsstandards des Verzeichnisses lieferbarer sche Nationalbibliothek Bücher (VLB) und zum anderen die Verbesserung der The Deutsche Naitonalbibliothek lists this publication in Aktualität und Vollständigkeit der Deutschen Nationalbi- the Deutsche Nationalbibliografie; detailed bibliographic bliografie. In der Titelaufnahme wird der entsprechende data are available in the Internet at http://dnb.dnb.de. Link zu den Verlagsangaben direkt geschaltet; ebenso Information bibliographique de la Deutsche Natio- alle anderen möglichen Links. nalbibliothek Die Verleger melden ihre Titel in einem einzigen Vor- La Deutsche Nationalbibliothek a répertoiré cette publi- gang für das VLB und den Neuerscheinungsdienst der cation dans la Deutsche Nationalbibliografie; les données Deutschen Nationalbibliothek. Dieser zeigt somit alle bibliographiques détaillées peuvent être consultées sur Neumeldungen von Titeln an, die auch in das VLB ein- Internet à l’adresse http://dnb.dnb.de gehen. Die VLB-Redaktion leitet die Meldungen an die Deutsche Nationalbibliothek weiter. Die Titel werden oh- Die Verleger übersenden gemäß den gesetzlichen Vor- ne weitere Änderungen im Neuerscheinungsdienst der schriften zur Pflichtablieferung zwei Pflichtexemplare je Deutschen Nationalbibliothek angezeigt. Die Titelanzei- nach Zuständigkeit an die Deutsche Nationalbibliothek gen selbst sind, wie auf der Sachgruppenübersicht an- nach Frankfurt am Main oder nach Leipzig. -
Systems Theory
1 Systems Theory BRUCE D. FRIEDMAN AND KAREN NEUMAN ALLEN iopsychosocial assessment and the develop - nature of the clinical enterprise, others have chal - Bment of appropriate intervention strategies for lenged the suitability of systems theory as an orga - a particular client require consideration of the indi - nizing framework for clinical practice (Fook, Ryan, vidual in relation to a larger social context. To & Hawkins, 1997; Wakefield, 1996a, 1996b). accomplish this, we use principles and concepts The term system emerged from Émile Durkheim’s derived from systems theory. Systems theory is a early study of social systems (Robbins, Chatterjee, way of elaborating increasingly complex systems & Canda, 2006), as well as from the work of across a continuum that encompasses the person-in- Talcott Parsons. However, within social work, sys - environment (Anderson, Carter, & Lowe, 1999). tems thinking has been more heavily influenced by Systems theory also enables us to understand the the work of the biologist Ludwig von Bertalanffy components and dynamics of client systems in order and later adaptations by the social psychologist Uri to interpret problems and develop balanced inter - Bronfenbrenner, who examined human biological vention strategies, with the goal of enhancing the systems within an ecological environment. With “goodness of fit” between individuals and their its roots in von Bertalanffy’s systems theory and environments. Systems theory does not specify par - Bronfenbrenner’s ecological environment, the ticular theoretical frameworks for understanding ecosys tems perspective provides a framework that problems, and it does not direct the social worker to permits users to draw on theories from different dis - specific intervention strategies. -
Should System Dynamics Be Described As a `Hard' Or `Deterministic' Systems Approach?
Systems Research and Behavioral Science Syst. Res. 17, 3–22 (2000) & Research Paper Should System Dynamics be Described as a `Hard' or `Deterministic' Systems Approach? David C. Lane* Operational Research Department, London School of Economics and Political Science, University of London, London, UK This paper explores the criticism that system dynamics is a `hard' or `deterministic' systems approach. This criticism is seen to have four interpretations and each is addressed from the perspectives of social theory and systems science. Firstly, system dynamics is shown to offer not prophecies but Popperian predictions. Secondly, it is shown to involve the view that system structure only partially, not fully, determines human behaviour. Thirdly, the field's assumptions are shown not to constitute a grand content theory Ð though its structural theory and its attachment to the notion of causality in social systems are acknowledged. Finally, system dynamics is shown to be significantly different from systems engineering. The paper concludes that such confusions have arisen partially because of limited communication at the theoretical level from within the system dynamics community but also because of imperfect command of the available literature on the part of external commentators. Improved communication on theoretical issues is encouraged, though it is observed that system dynamics will continue to justify its assumptions primarily from the point of view of practical problem solving. The answer to the question in the paper's title is therefore: on balance, no. Copyright # 2000 John Wiley & Sons, Ltd. Keywords systems theory; systems thinking; information feedback; systems engineering; social theory; philosophy INTRODUCTION approach is then introduced. -
The Place and Meaning of Computing in a Sound Relationship of Man, Machines, and Environment
Proceedings ICMC|SMC|2014 14-20 September 2014, Athens, Greece The place and meaning of computing in a sound relationship of man, machines, and environment Agostino Di Scipio Electroacoustic Music Dept., Conservatory of L'Aquila, Italy [email protected] ABSTRACT other than digital in order to make sense of what in the world can be computed - provided there is anything really The following is a revised version of the text prepared by computable in music-related activities (a problematic the author for his keynote speech at the opening session question, often debated years ago). However, today the of the International Computer Music Conference 2013 particular manner in which digital technologies are sided (12.08.2013 Heath Ledger Theatre, State Theatre Centre, by, and integrated in, different but overlapping techno- logical layers, seems to be increasingly significant to Perth, Western Australia). It bears on conceptual changes practitioners. This is clear from live performance prac- that have taken place, along the decades, in the shared tices where computing devices do not represent some- notion of "computing" as relative to creative practices of thing standing on its own, and are rather embedded in a sound- and music-making. In particular, the notion of larger "performance ecosystem" (Waters, 2011) where computing is considered vis a vis the relationship, either other technogical layers and agencies play an (equally?) implicity established or deliberately designed by practi- important role, whether they are human agencies (per- tioners, to the (necessarily hybrid) technological infra- formers), mechanical agencies (music instruments and structures of their work, as well as to the surrouding various infrastructures), or devices ranging from basic physical space where such practices take place. -
Kant, Cybernetics, and Cybersecurity: Integration and Secure Computation
Kant, Cybernetics, and Cybersecurity: Integration and Secure Computation Jon K. Burmeister and Ziyuan Meng College of Mount Saint Vincent Drew University [email protected], [email protected] Abstract1 This paper argues that Kant’s philosophy of mind sheds light on Heinz Von Foerster’s cybernetic thinking, and that both thinkers help us identify dubious theoretical assumptions within computer science and cybersecurity. Specifically, these two thinkers discuss the importance of integration within systems, a position which contrasts with a reductionist form of thinking currently common in computer science. We argue that such a reductionist and narrowly technocentric approach leads to the design of insecure software systems. To develop an improved theory of security and vulnerability, we look for inspiration to Kant and von Foerster. Our approach focuses on two types of integration within Kant’s philosophy of mind – the “unity of apperception,” and the unity of the mental faculties – and then traces these same themes in the thought of von Foerster. Building on that, we argue two points: 1.) a secure software system never directly takes its structure or operations from the external environement, and 2.) the more integrated a software system is, the more secure it is. To illustrate these points, we analyze a case study of a code injection attack against a vulnerable web application, and show how such a system is vulnerable to cyberattack when it fails to maintain its integrated form in response to inputs from the environment. Keywords: Philosophy of Mind, Cybernetics, Cybersecurity, Information Systems, Kant, Heinz von Foerster, Integration, Reductionism. 1. Introduction The philosophical tradition of German Idealism and the field of cybernetics share a common impulse: both strive to think systematically and at a high level of generality, with the goal of discovering foundational principles that apply across a wide variety of domains. -
Two Canadian Case Studies Alex Ryan and Mark Leung
RSD2 Relating Systems Thinking and Design 2013 working paper. www.systemic-design.net Systemic Design: Two Canadian Case Studies Alex Ryan and Mark Leung Always design a thing by considering it in its next larger context – a chair in a room, a room in a house, a house in an environment, an environment in a city plan —Eliel Saarinen1 A systems approach begins when first you see the world through the eyes of another —C. West Churchman2 Design is the future of systems methodology —Russ Ackoff3 Design is about unlocking the possibilities that lie within multiple perspectives. That design is about solving a complex problem with multiple constraints – John Maeda4 Introduction The currently fragmented state of ‘systems + design’ praxis is curious in light of the affinities between the two interdisciplines, as emphasized in the quotations above. To explain why designers and systems thinkers have not been talking to each other, we may look to their differences. Design as evolution of craft has been characterized as “thinking with your hands” and as such is rooted in an epistemology of practice.5 In contrast, the systems movement began with Ludwig von Bertalanffy’s General System Theory, which placed systems thinking above the disciplinary sciences, in order to provide a non-reductionist foundation for the unity of science.6 Whereas the designer learns by doing in concrete situations, the systems thinker’s knowledge accrues by abstracting away from the particular details of any specific instance of practice. But if this genealogy is sufficient to account for the lack of dialogue between and synthesis of systems + design, then the two interdisciplines are on a collision course. -
What Is Systems Theory?
What is Systems Theory? Systems theory is an interdisciplinary theory about the nature of complex systems in nature, society, and science, and is a framework by which one can investigate and/or describe any group of objects that work together to produce some result. This could be a single organism, any organization or society, or any electro-mechanical or informational artifact. As a technical and general academic area of study it predominantly refers to the science of systems that resulted from Bertalanffy's General System Theory (GST), among others, in initiating what became a project of systems research and practice. Systems theoretical approaches were later appropriated in other fields, such as in the structural functionalist sociology of Talcott Parsons and Niklas Luhmann . Contents - 1 Overview - 2 History - 3 Developments in system theories - 3.1 General systems research and systems inquiry - 3.2 Cybernetics - 3.3 Complex adaptive systems - 4 Applications of system theories - 4.1 Living systems theory - 4.2 Organizational theory - 4.3 Software and computing - 4.4 Sociology and Sociocybernetics - 4.5 System dynamics - 4.6 Systems engineering - 4.7 Systems psychology - 5 See also - 6 References - 7 Further reading - 8 External links - 9 Organisations // Overview 1 / 20 What is Systems Theory? Margaret Mead was an influential figure in systems theory. Contemporary ideas from systems theory have grown with diversified areas, exemplified by the work of Béla H. Bánáthy, ecological systems with Howard T. Odum, Eugene Odum and Fritj of Capra , organizational theory and management with individuals such as Peter Senge , interdisciplinary study with areas like Human Resource Development from the work of Richard A. -
Control System Design Methods
Christiansen-Sec.19.qxd 06:08:2004 6:43 PM Page 19.1 The Electronics Engineers' Handbook, 5th Edition McGraw-Hill, Section 19, pp. 19.1-19.30, 2005. SECTION 19 CONTROL SYSTEMS Control is used to modify the behavior of a system so it behaves in a specific desirable way over time. For example, we may want the speed of a car on the highway to remain as close as possible to 60 miles per hour in spite of possible hills or adverse wind; or we may want an aircraft to follow a desired altitude, heading, and velocity profile independent of wind gusts; or we may want the temperature and pressure in a reactor vessel in a chemical process plant to be maintained at desired levels. All these are being accomplished today by control methods and the above are examples of what automatic control systems are designed to do, without human intervention. Control is used whenever quantities such as speed, altitude, temperature, or voltage must be made to behave in some desirable way over time. This section provides an introduction to control system design methods. P.A., Z.G. In This Section: CHAPTER 19.1 CONTROL SYSTEM DESIGN 19.3 INTRODUCTION 19.3 Proportional-Integral-Derivative Control 19.3 The Role of Control Theory 19.4 MATHEMATICAL DESCRIPTIONS 19.4 Linear Differential Equations 19.4 State Variable Descriptions 19.5 Transfer Functions 19.7 Frequency Response 19.9 ANALYSIS OF DYNAMICAL BEHAVIOR 19.10 System Response, Modes and Stability 19.10 Response of First and Second Order Systems 19.11 Transient Response Performance Specifications for a Second Order -