The geometro-stochastic quantization of a gauge theory based on the (4,1)-de Sitter group is presented. The theory contains an intrinsic elementary length parameter R of geometric origin taken to be of a size typical for hadron physics. Use is made of a soldered Hilbert bundle ℋ over curved spacetime carrying a phase space representation of SO(4, 1) with the Lorentz subgroup related to a vierbein formulation of gravitation. The typical fiber of ℋ is a resolution kernel Hilbert space ℋ $_{\bar (...) \eta }^{(\rho )} $ constructed in terms of generalized coherent states $\bar \eta $ ρ related to the principal series of unitary irreducible representations of SO(4, 1), namely de Sitter horospherical waves for spinless particles characterized by the parameter ρ. The framework is, finally, extended to a quantum field-theoretical formalism by using bundles with Fock space fibers constructed from ℋ $_{\bar \eta }^{(\rho )} $. (shrink)

Through the case of the Helix_T wind turbine project, this article sets out to argue two points: first, on a theoretical level, that Commons-based peer production, in conjunction with the emerging technological capabilities of three-dimensional printing, can also produce promising hardware, globally designed and locally produced. Second, the Commons-oriented wind turbine examined here is also meant to practically contribute to the quest for novel solutions to the timely problem of the need for renewable sources of energy, more in the sense (...) of a development process than as a ready-to-apply solution. We demonstrate that it is possible for someone with partial initial knowledge to initiate a similar, complex project based on an interesting idea, and to succeed in implementing it through collaboration with Commons-oriented communities, while using peer-produced products and tools. Given the trends and trajectories both of the current information-based paradigm and the problems of the predominant industrial modes of production with all the collateral damage they entail, this may be considered a positive message indeed. (shrink)

Is Einstein's metric theory of gravitation to be quantized to yield a complete and logically consistent picture of the geometry of the real world in the presence of quantized material sources? To answer this question, we give arguments that there is a consistent way to extend general relativity to small distances by incorporating further geometric quantities at the level of the connection into the theory and introducing corresponding field equations for their determination, allowing thereby the metric and the Levi-Civita connection (...) to remain classical quantities. The dualism between matter and geometry is extended to quantized fields with the help of a Hibert bundle ℋ raised over a Riemann-Cartan spacetime. Quantized subnuclear matter fields (generalized quantum mechanical wave functions) are sections on ℋ which determine generalized bilinear currents acting as sourc currents for the bundle geometry at small distances. The established dualism between matter and the underlying bundle geometry contains general relativity as a classical part. (shrink)

Summary The philosophical implications associated with the choice of a particular geometry required for the formulation of a dynamics at subnuclear distances are discussed. A dualism between geometry and matter — the former identified with a fiber bundle of Cartan type raised over space-time, the latter represented by a generalized quantum mechanical wave function — is presented as a possible framework for the dynamics of strongly interacting particles at distances of 10-13 cm.

A massless electroweak theory for leptons is formulated in a Weyl space, W4, yielding a Weyl invariant dynamics of a scalar field φ, chiral Dirac fermion fields ψL and ψR, and the gauge fields κμ, Aμ, Zμ, Wμ, and Wμ †, allowing for conformal rescalings of the metric gμν and all fields with nonvanishing Weyl weight together with the corresponding transformations of the Weyl vector fields, κμ, representing the D(1) or dilatation gauge fields. The local group structure of this Weyl (...) electroweak (WEW) theory is given by $G = SO(3,1) \otimes D(1) \otimes \tilde G$ —or its universal coverging group $\bar G$ for the fermions—with $\tilde G$ denoting the electroweak gauge group SU(2)W × U(1)Y. In order to investigate the appearance of nonzero masses in the theory the Weyl symmetry is explicitly broken by a term in the Lagrangean constructed with the curvature scalar R of the W4 and a mass term for the scalar field. Thereby also the Zμ and Wμ gauge fields as well as the charged fermion field (electron) acquire a mass as in the standard electroweak theory. The symmetry breaking is governed by the relation D μ Φ 2 = 0, where Φ is the modulus of the scalar field and Dμ denotes the Weyl-covariant derivative. This true symmetry reduction, establishing a scale of length in the theory by breaking the D(1) gauge symmetry, is compared to the so-called spontaneous symmetry breaking in the standard electroweak theory, which is, actually, the choice of a particular (nonlinear ) gauge obtained by adopting an origin, ${\hat \phi }$ , in the coset space representing ϕ, with ${\hat \phi }$ being invariant under the electromagnetic, gauge group U(1)e.m.. Particular attention is devoted to the appearance of Einstein's equations for the metric after the Weyl symmetry breaking, yielding a pseudo-Riemannian space, V4, from a W4 and a scalar field with a constant modulus $\hat \phi _0$ . The quantity $\hat \phi _0^2$ affects Einstein's gravitational constant in a manner comparable to the Brans-Dicke theory. The consequences of the broken WEW theory are worked out and the determination of the parameters of the theory is discussed. (shrink)

If it is the tendency of technology, and especially of information and communication technology, particularly in the context of the smart city, not to empower the human person but rather to disenfranchise them by curtailing their capability to judge and choose, how can one counter this dynamic? Code, make, talk, and pray are suggested as possible modes of resistance.

It is a commonly held belief that the law is unable to keep up with the fierce technological development and innovation that denote our times. The current essay attempts to show that this characteristic of the law should not necessarily be considered a disadvantage. Using the Biblical concept of the katechon, we argue that the law fulfills a katechontic function vis-a-vis technological progress. That is to say, its retarding effect might create positive spillovers that open spaces for debate, discussion, contestation, (...) resistance, and reconstruction. (shrink)

Rational agents are supposed to maximize expected utility. But what are the options from which they choose? I outline some constraints on an adequate representation of an agent’s options. The options should, for example, contain no information of which the agent is unsure. But they should be sufficiently rich to distinguish all available acts from one another. These demands often come into conflict, so that there seems to be no adequate representation of the options at all. After reviewing existing proposals (...) for how to construe decision-theoretic options and finding them all wanting, I suggest that our model of rational agents should include a special domain of ‘virtual’ option propositions to serve as formal objects of deliberation and choice. (shrink)

Traditional logic as a part of philosophy is one of the oldest scientific disciplines. Mathematical logic, however, is a relatively young discipline and arose from the endeavors of Peano, Frege, Russell and others to create a logistic foundation for mathematics. It steadily developed during the 20th century into a broad discipline with several sub-areas and numerous applications in mathematics, informatics, linguistics and philosophy. While there are already several well-known textbooks on mathematical logic, this book is unique in that it is (...) much more concise than most others, and the material is treated in a streamlined fashion which allows the professor to cover many important topics in a one semester course. Although the book is intended for use as a graduate text, the first three chapters could be understood by undergraduates interested in mathematical logic. These initial chapters cover just the material for an introductory course on mathematical logic combined with the necessary material from set theory. This material is of a descriptive nature, providing a view towards decision problems, automated theorem proving, non-standard models and other subjects. The remaining chapters contain material on logic programming for computer scientists, model theory, recursion theory, Godel’s Incompleteness Theorems, and applications of mathematical logic. Philosophical and foundational problems of mathematics are discussed throughout the text. The author has provided exercises for each chapter, as well as hints to selected exercises. About the German edition: …The book can be useful to the student and lecturer who prepares a mathematical logic course at the university. What a pity that the book is not written in a universal scientific language which mankind has not yet created. - A.Nabebin, Zentralblatt. (shrink)

Modal accounts of knowledge, mind, and language, as prominently defended by Lewis, leave no room for enquiry into non-contingent matters. According to Lewis, there is only one necessarily true proposition, and it is vacuously known by everyone. What, then, are we doing when we do metaphysics, which often seems to deal with non-contingent questions? Lewis never gave a satisfactory answer, or even acknowledged the problem. I explore some options. Can we understand the relevant parts of metaphysics as dealing with contingent (...) questions about our concepts? Can we understand them in terms of a hyperintensional conception of “explicit” knowledge? Both options have some promise. Ultimately, however, I don’t think they succeed at squaring Lewis’s empiricist epistemology with his metaphysical realism. (shrink)

1992 haben die Verfasser eine Reihe von Gesprächen geführt, um die Entdeckung einer doppeltgerichteten Zeit, die Wolfgang Kaempfer in Zusammenarbeit mit Friedrich Cramer zu einem plausiblen Modell entwickelt hat, auf Reichweite und Konsequenz hin zu prüfen. Die nun sorgfältig ausgearbeiteten acht Gespräche, in denen Dietmar Kamper aus seiner Erfahrung der Zeit als 'paradoxer Wiederholung' die Fragen stellt und Wolfgang Kaempfer seine Antworten mit spekulativer Kraft immer aufs Neue vorantreibt, zeigen ein weites Spektrum von möglichen Fällen der Anwendung des (...) Modells; hauptsächlich in den historischen Wissenschaften, aber auch in der Ästhetik, der Philosophie und der Religion! Sie zeigen aber auch, daß die Gesprächsform einer solchen Entdeckung, die über das Modell hinaus weiterentwickelt werden soll, eher entspricht als die Abhandlung. Es geht nämlich nicht um gerichtetes Wissen, sondern um eine intensive Weise des experimentellen Fragens und Antwortens, die in der momentanen Verwirrung der Kriterien auf eine neue Orientierung abhebt. (shrink)

We distinguish three qualitatively different types of uncertainty—ethical, option and state space uncertainty—that are distinct from state uncertainty, the empirical uncertainty that is typically measured by a probability function on states of the world. Ethical uncertainty arises if the agent cannot assign precise utilities to consequences. Option uncertainty arises when the agent does not know what precise consequence an act has at every state. Finally, state space uncertainty exists when the agent is unsure how to construct an exhaustive state space. (...) These types of uncertainty are characterised along three dimensions—nature, object and severity—and the relationship between them is examined. We conclude that these different forms of uncertainty cannot be reduced to empirical uncertainty about the state of the world without inducing an increase in its severity. (shrink)

While issues of efficacy and specificity are crucial for the future of neurofeedback training, there may be alternative designs and control analyses to circumvent the methodological and ethical problems associated with double-blind placebo studies. Surprisingly, most NF studies do not report the most immediate result of their NF training, i.e. whether or not children with ADHD gain control over their brain activity during the training sessions. For the investigation of specificity, however, it seems essential to analyze the learning and adaptation (...) processes that take place in the course of the training and to relate improvements in self-regulated brain activity across training sessions to behavioral, neuropsychological and electrophysiological outcomes. To this aim, a review of studies on neurofeedback training with ADHD patients, which include the analysis of learning across training sessions or relate training performance to outcome, is presented. Methods on how to evaluate and quantify learning of EEG regulation over time are discussed. “Non-learning” has been reported in a small number of ADHD-studies, but has not been a focus of general methodological discussion so far. For this reason, selected results from the brain-computer interface (BCI) research on the so-called “brain-computer illiteracy”, the inability to gain control over one’s brain activity, are also included. It is concluded that in the discussion on specificity, more attention should be devoted to the analysis of EEG regulation performance in the course of the training and its impact on clinical outcome. It is necessary to improve the knowledge on characteristic cross-session and within-session learning trajectories in ADHD and to provide the best conditions for learning. (shrink)

Der eigentümliche Ausdruck, der heute meist für Welt steht, der Ausdruck Umwelt, scheint ein Welt-Verhältnis auszudrücken, das den Akzent nicht aufs Objekt, sondern aufs Subjekt verlegt hat, auf die den Weltmittelpunkt einnehmende Monade. Diese scheint die Welt nicht mehr als gegebene, sondern als Ensemble von Varietäten zu verstehen, auf die sie zugreifen kann, dem Flaneur auf den Supermärkten dieser Welt vergleichbar. Der Form nach hält sie an einem Eigentumsbegriff fest, der als substantiell, als statisch auslegt, was in Wirklichkeit dynamisch ist (...) in einer Welt, die seit Generationen keinerlei festes Eigentum mehr gelten lassen konnte. Es ist der permanente Zugriff, der verrät, daß er dem in Wahrheit Rechnung trägt. Das >Eigentum sieht sich auf den permanenten Gestus der Aneignung angewiesen. Ein perverseres System ist geschichtlich wahrscheinlich niemals beobachtet worden. Nicht das viel gescholtene Konkurrenzprinzip, ein weit virulenteres Movens treibt es an. Denn das Aneignungsprinzip. (shrink)

Die Frage, wie ein Anfang im Denken zu machen sei, oder wie der Anfang von Denken zu denken sei, war Gegenstand der philosophischen Reflexion des Klassischen Deutschen Idealismus. Die Autoren dieses Bandes thematisieren nun für philosophische Konzepte aus der Zeit vor und nach dem Klassischen Idealismus, wie in ihnen das Problem des Anfangs gedacht wird. Betrachtete Autoren sind: Marsilius Ficino, Johannes Scotus Eriugena, Giordano Bruno, Christoph Scheibler, Husserl, Meister Eckhard, Nishida und Davidson.

Es existieren unterschiedlichste Antworten auf die Frage, ob Tieren bzw. allgemein nichtmenschlichen Lebewesen ein inhärenter moralischer Wert zukommt. Dieses Buch gelangt auf transzendentalphilosophischem Wege zu der Antwort, daß allen Lebewesen ein solcher Wert zukommt. Hieraus erwächst die eigentliche ethische Herausforderung, da der Mensch notwendig andere Lebewesen nutzen muß, um überleben zu können. Die Lösung des hiermit bezeichneten Dilemmas, so wird gezeigt, erwächst aus der Unterscheidung von das Gute und ein Gut.

This book is about the interrelationship between nature, semiosis, metarepresentation and (self-)consciousness, and the role played by metarepresentation in ...

Wolfgang Welsch examines global aestheticization phenomena, probes the relationship of aesthetics and ethics, and considers the broad relevance of aesthetics for contemporary thinking. He argues that modes of thought familiar from the aesthetic realm comprise fundamental paradigms for understanding todayÆs reality. The implications for specific and everyday issues are demonstrated in studies of architecture, advertising, the Internet, and our perception of the life world. Surgically precise, innovative, and, above all, relevant, this book is an essential resource, providing the analysis (...) of contemporary culture with philosophical bite. Aesthetics is to transcend itself, address the whole realm of aethesis, and hence enable orientation in the contemporary condition. Undoing aesthetics means releasing it from old cultural binds and giving it new ties with the future. (shrink)

Magnetism in meta-semantics is the view that the meaning of our words is determined in part by their use and in part by the objective naturalness of candidate meanings. This hypothesis is commonly attributed to David Lewis, and has been put to philosophical work by Brian Weatherson, Ted Sider and others. I argue that there is no evidence that Lewis ever endorsed the view, and that his actual account of language reveals good reasons against it.

Einflussreiche Denkerin des 20. Jahrhunderts. Das Handbuch erklärt die philosophischen, politischen und literarischen Kontexte, die Hannah Arendts Denken geprägt haben. Es präsentiert neben Informationen zur Biografie und den zeitgenössischen Bezügen alle wichtigen Werke und gibt Hinweise zu deren internationaler Rezeption in vielen Disziplinen. Zentrale Begriffe und Konzepte im Gesamtwerk Hannah Arendts werden ausführlich erklärt darunter: Antisemitismus, Das Böse, Macht, Revolution, Republik/Nation, Totalitarismus u. v. a.

This succinct introduction to modern theories of literature and the arts demonstrates how each theory is built and what it can accomplish. Represents a wide variety of theories, including phenomenological theory, hermeneutical theory, gestalt theory, reception theory, semiotic theory, Marxist theory, deconstruction, anthropological theory, and feminist theory. Uses classic literary texts, such as Keats’s Ode on a Grecian Urn, Spenser’s The Shephearde’s Calender and T. S. Eliot’s The Waste Land to illustrate his explanations. Includes key statements by the major proponents (...) of each theory. Presents the different theories objectively, allowing students to decide which if any, they subscribe to. Gives students a sense of the potential of theory. Includes a glossary of technical terms. (shrink)

Während die bisherige Forschung überwiegend auf Rekonstruktion und Analyse des philosophischen und pädagogischen Werkes von Theodor Litt bezogen war, konzentrieren sich gegenwärtige Untersuchungen bedingt durch die Zunahme von ...

Our senses provide us with information about the world, but what exactly do they tell us? I argue that in order to optimally respond to sensory stimulations, an agent’s doxastic space may have an extra, “imaginary” dimension of possibility; perceptual experiences confer certainty on propositions in this dimension. To some extent, the resulting picture vindicates the old-fashioned empiricist idea that all empirical knowledge is based on a solid foundation of sense-datum propositions, but it avoids most of the problems traditionally associated (...) with that idea. The proposal might also explain why experiences appear to have a non-physical phenomenal character, even if the world is entirely physical. (shrink)

This paper starts out from the idea that semantics is a “special science” whose aim, like that of chemistry or ecology, is to identify systematic, high-level patterns in a fundamentally physical world. I defend an approach to this task on which sentences are associated with with sets of possible worlds (of some kind). These sets of worlds, however, are not postulated for the compositional treatment of intensional contexts; they are not meant to capture what is intuitively asserted or communicated by (...) an utterance; nor are they supposed to shed light on the cognitive processes that underlie out linguistic competence. Instead, their job description is to capture certain regularities in the interactions between subjects using the relevant language. I also raise some questions about how the relevant worlds might be construed. (shrink)