Communication is an important feature of the living world that mainstream biology fails to adequately deal with. Applying two main disciplines can be contemplated to fill in this gap: semiotics and information theory. Semiotics is a philosophical discipline mainly concerned with meaning; applying it to life already originated in biosemiotics. Information theory is a mathematical discipline coming from engineering which has literal communication as purpose. Biosemiotics and information theory are thus concerned with distinct and complementary possible meanings of the word (...) ‘communication’. Since literal communication needs to be secured so as to enable semantics being communicated, information theory is a necessary prerequisite to biosemiotics. Moreover, heredity is a purely literal communication process of capital importance fully relevant to literal communication, hence to information theory. A short introduction to discrete information theory is proposed, which is centred on the concept of redundancy and its use in order to make sequences resilient to errors. Information theory has been an extremely active and fruitful domain of researches and the motor of the tremendous progress of communication engineering in the last decades. Its possible connections with semantics and linguistics are briefly considered. Its applications to biology are suggested especially as regards error-correcting codes which are mandatory for securing the conservation of genomes. Biology needs information theory so biologists and communication engineers should closely collaborate. (shrink)

The necessary but not sufficient conditions for biological informational concepts like signs, symbols, memories, instructions, and messages are (1) an object or referent that the information is about, (2) a physical embodiment or vehicle that stands for what the information is about (the object), and (3) an interpreter or agent that separates the referent information from the vehicle’s material structure, and that establishes the stands-for relation. This separation is named the epistemic cut, and explaining clearly how the stands-for relation is (...) realized is named the symbol-matter problem. (4) A necessary physical condition is that all informational vehicles are material boundary conditions or constraints acting on the lawful dynamics of local systems. It is useful to define a dependency hierarchy of information types: (1) syntactic information (i.e., communication theory), (2) heritable information acquired by variation and natural selection, (3) non-heritable learned or creative information, and (4) measured physical information in the context of natural laws. High information storage capacity is most reliably implemented by discrete linear sequences of non-dynamic vehicles, while the execution of information for control and construction is a non-holonomic dynamic process. The first epistemic cut occurs in self-replication. The first interpretation of base sequence information is by protein folding; the last interpretation of base sequence information is by natural selection. Evolution has evolved senses and nervous systems that acquire non-heritable information, and only very recently after billions of years, the competence for human language. Genetic and human languages are the only known complete general purpose languages. They have fundamental properties in common, but are entirely different in their acquisition, storage and interpretation. (shrink)

The mathematical theory of communication.

In his bestselling work of popular science, Sir Roger Penrose takes us on a fascinating roller-coaster ride through the basic principles of physics, cosmology, mathematics, and philosophy to show that human thinking can never be emulated by a machine.

A classic source for understanding the connections between information theory and physics, this text was written by one of the giants of 20th-century physics and is appropriate for upper-level undergraduates and graduate students. Topics include the principles of coding, coding problems and solutions, the analysis of signals, a summary of thermodynamics, thermal agitation and Brownian motion, and thermal noise in an electric circuit. A discussion of the negentropy principle of information introduces the author's renowned examination of Maxwell's demon. Concluding chapters (...) explore the associations between information theory, the uncertainty principle, and physical limits of observation, in addition to problems related to computing, organizing information, and inevitable errors. 1962 ed. 81 figures. 14 tables. (shrink)

This is the first time that a seminal collection of fourteen essays by Martin Heidegger (originally published in German under the title Wegmarken) has appeared in English in its complete form. It includes new or first-time translations of seven essays, and thoroughly revised, updated versions of the other seven. Amongst the new translations are such key essays as 'On the Essence of Ground', 'Hegel and the Greeks' and 'On the Question of Being'. Spanning a period from 1919-1961, these essays have (...) become established points of reference for all those with a serious interest in Heidegger. Now collected for the first time in translations by an experienced Heidegger translator and scholar, they will prove an essential resource for all students of Heidegger. (shrink)

The genetic code appeared on Earth with the first cells. The codes of cultural evolution arrived almost four billion years later. These are the only codes that are recognized by modern biology. In this book, however, Marcello Barbieri explains that there are many more organic codes in nature, and their appearance not only took place throughout the history of life but marked the major steps of that history. A code establishes a correspondence between two independent 'worlds', and the codemaker is (...) a third party between those 'worlds'. Therefore the cell can be thought of as a trinity of genotype, phenotype and ribotype. The ancestral ribotypes were the agents which gave rise to the first cells. The book goes on to explain how organic codes and organic memories can be used to shed new light on the problems encountered in cell signalling, epigenesis, embryonic development, and the evolution of language. (shrink)

This highly readable theory of life and its origins offers a non-technical discussion of a chemical perspective on the fundamental organisation of living systems. Essays on the biological and philosophical significance of Ganti's work of thirty years indicate not only its enduring theoretical significance, but also the continuing relevance and heuristic power of Ganti's insights.

Stuart Kauffman here presents a brilliant new paradigm for evolutionary biology, one that extends the basic concepts of Darwinian evolution to accommodate recent findings and perspectives from the fields of biology, physics, chemistry and mathematics. The book drives to the heart of the exciting debate on the origins of life and maintenance of order in complex biological systems. It focuses on the concept of self-organization: the spontaneous emergence of order widely observed throughout nature. Kauffman here argues that self-organization plays an (...) important role in the emergence of life itself and may play as fundamental a role in shaping life's subsequent evolution as does the Darwinian process of natural selection. Yet until now no systematic effort has been made to incorporate the concept of self-organization into evolutionary theory. The construction requirements which permit complex systems to adapt remain poorly understood, as is the extent to which selection itself can yield systems able to adapt more successfully. This book explores these themes. It shows how complex systems, contrary to expectations, can spontaneously exhibit stunning degrees of order, and how this order, in turn, is essential for understanding the emergence and development of life on Earth. Topics include the new biotechnology of applied molecular evolution, with its important implications for developing new drugs and vaccines; the balance between order and chaos observed in many naturally occurring systems; new insights concerning the predictive power of statistical mechanics in biology; and other major issues. Indeed, the approaches investigated here may prove to be the new center around which biologicalscience itself will evolve. The work is written for all those interested in the cutting edge of research in the life sciences. (shrink)

erkennung der Postmodernität: Hilfen für Historiker – und Historiker der Wissenschaften im Besonderen. Ausgehend von einer Unterscheidung zwischen der Postmodernit?t als einer von der Modernit?t durch eine breite Umkehr ihrer kulturellen Grundannahmen abgegrenzten historischen Ära und dem Postmodernismus – einer von den selbsternannten Postmodernisten in der frühen Postmodernität angenommenen intellektuellen Attitüde – thematisiert der Aufsatz zwei grundsätzliche Charakteristika der Postmodernität: Erstens die Umkehrung der kulturellen Rangfolge von Wissenschaft und Technik, worin Postmodernität und Postmodernismus übereinstimmen. Zweitens die Ablösung des Ideals eines (...) methodisch vorgehenden, uneigennützigen Wissenschaftlers, nicht durch ein fragmentiertes Subjekt, wie der Postmodernismus behauptet, sondern durch den einseitig interessierten Unternehmer, welcher unter Missachtung aller Regeln hartnäckig seine Eigeninteressen verfolgt. Diese Umkehr in Bedeutung und Rolle von Wissenschaft und Technologie, die um 1980 begann, ist ein Kennzeichen des Übergangs von der Modernit?t zur Postmodernität. Diese Umkehr ist primär zu erkennen als eine Ablehnung des Regelhaften, des methodischen Vorgehens – mit dem “Methodismus” als einer die Modernität auszeichnenden kulturellen Perspektive – aber auch als eine Ablehnung der Uneigennützigkeit, einer in der Modernität besonders wert geschätzten Geisteshaltung. Postmodernität konstituiert sich somit als diese Umwertung der Werte, die ihre Quelle im ich-fixierten, transgressiven und “risiko”-freudigen postmodernen Individuum und seinen anti-sozialen Annahmen in Bezug auf Persönlichkeit hat. In der Wissenschaftsgeschichte selbst findet sich daher seit circa 1980 ein entsprechender Wandel der wissenschaftlichen Aufmerksamkeit weg von der Wissenschaft und hin zur Technologie. Damit einhergeht eine erstaunliche Vermeidung sozialhistorischer Perspektivierung, wie sie sich nicht zuletzt in der Abkehr von kausalistischen “Einfluss”-Erklärungen zugunsten voluntaristischer “Ressourcen”-Erklärungen spiegelt.cognizing Postmodernity: Helps for Historians – of Science Especially. stmodernity, a historical era demarcated from modernity by a broad reversal in cultural presuppositions, is distinguished from postmodernism, an intellectual posture adopted by self-identified postmodernists early in postmodernity. Two principal features of postmodernity are addressed: first, the downgrading of science and the upgrading of technology in cultural rank – on which postmodernity and postmodernism are in accord; second, the displacement of the methodical, disinterested scientist, modernity's beau ideal, not by a fragmented subject as postmodernism claims, but by the single-minded entrepreneur, resourcefully pursuing his self-interest in disregard of all rules. The reversal in rank and role as between science and technology, setting in circa 1980, is a marker of the transition from modernity to postmodernity. That reversal is to be cognized primarily as rejection of rule-following, of proceeding methodically – ‘methodism’ being the cultural perspective that uniquely distinguished modernity – but also as rejection of disinterestedness, the quality of mind especially highly esteemed in modernity. Postmodernity is constituted by this transvaluation of values, whose well-spring is the egocentric, transgressive , postmodern personality and its anti-social presumptions regarding personhood. Within the history of science itself there has been since circa 1980 a corresponding turn of scholarly attention away from science to technology, and a growing distaste for social perspectives, reflected, i. a., in the rejection of causalist ‘influence’ explanations in favor of voluntarist ‘resource’ explanations. (shrink)