During his whole scientific life Hermann Weyl was fascinated by the interrelation of physical and mathematical theories. From the mid 1920s onward he reflected also on the typical difference between the two epistemic fields and tried to identify it by comparing their respective automorphism structures. In a talk given at the end of the 1940s he gave the most detailed and coherent discussion of his thoughts on this topic. This paper presents his arguments in the talk and puts it in (...) the context of the later development of gauge theories. (shrink)

info:eu-repo/semantics/publishedVersion.

Scheibe is one of the most important philosophers of science in Germany. He has written extensively on all the problems that confront the philosophy of physics: rationalism vs. empiricism; reductionism; the foundations of quantum mechanics; space-time, and much more. Since little of his work has been translated into English, he is not yet well known internationally. However, this collection of some 40 of his papers will remedy this unfortunate situation.

Erhard Wiersing ; Literaturverz. S. [1013] - 1071 ; Inhaltsverzeichnis ; Volltext // Exemplar mit der Signatur: München, Bayerische Staatsbibliothek -- PVA 2007.1762.

Ever since Parmenides, one of philosophy's riddles has been how we are able to direct our thoughts to non-being. Erhard uses the problem of non-existence as the starting point for an analysis of Husserl's phenomenology. He examines Husserl's interpretation of judgments about non-being as judgments made "under assumption" and his analysis of "free fantasy." Erhard thus demonstrates that Husserl is compatible with today's non-relational theories.

Hermann Weyl was one of the early contributors to the mathematics of general relativity. This article argues that in 1929, for the formulation of a general relativistic framework of the Dirac equation, he both abolished and preserved in modified form the conceptual perspective that he had developed earlier in his “analysis of the problem of space.” The ideas of infinitesimal congruence from the early 1920s were aufgehoben in the general relativistic framework for the Dirac equation. He preserved the central idea (...) of gauge as a “purely infinitesimal” aspect of symmetries in a group extension schema. With respect to methodology, however, Weyl gave up his earlier preferences for relatively a-priori arguments and tried to incorporate as much empiricism as he could. This signified a clearly expressed empirical turn for him. Moreover, in this step he emphasized that the mathematical objects used for the representation of matter structures stood at the center of the construction, rather than interaction fields which, in the early 1920s, he had considered as more or less derivable from geometrico-philosophical considerations. (shrink)

ERHARD SCHEIBE Kant's Apriorism and Some Modern Positions The terms a priori and its counterpart a posteriori are of medieval origin.1 In the fourteenth ...

1. Universi corporis pansophici caput summum --2. Arithmetische Beschreibung der Moral-Weisheit von Personen und Sachen.

Dieses voluminöse Werk ist Abhandlung, Lehrbuch und Nachschlagewerk in einem! Vertretern unterschiedlicher Forschungsgebiete, vor allem aber denen der Pädagogik, liegt hier der im heutigen Wissenschaftsraum erstmals unternommene Versuch vor, das Phänomen »Menschenbildung« nicht allein erziehungswissenschaftlich, sondern umfassend humanwissenschaftlich zu begründen. Unter Berücksichtigung der naturgeschichtlichen, historisch-kulturellen wie historisch-gesellschaftlichen Bedingungen wird auf eine grundsätzliche Vergewisserung des Verständnisses von Menschenbildung hingearbeitet, um letztendlich auch eine neue Sichtweise auf das Phänomen Bildung zu ermöglichen. Praxis wird nur insoweit thematisiert, als sie Gegenstand der Theorie ist (...) und damit ihrer Aufklärung dient. Unter Bildung wird dabei jener alles umfassende Wirkungs- und Handlungszusammenhang verstanden, in dem das menschliche Individuum vom Anbeginn seines Lebens bis zu seinem Tode geformt wird und sich selbst formt. (shrink)

Biofilms can be viewed as tissue‐like structures in which microorganisms are organized in a spatial and functional sophisticated manner. Biofilm formation requires the orchestration of a highly integrated network of regulatory proteins to establish cell differentiation and production of a complex extracellular matrix. Here, we discuss the role of the essential Bacillus subtilis biofilm activator RemA. Despite intense research on biofilms, RemA is a largely underappreciated regulatory protein. RemA forms donut‐shaped octamers with the potential to assemble into dimeric superstructures. The (...) presumed DNA‐binding mode suggests that RemA organizes its target DNA into nucleosome‐like structures, which are the basis for its role as transcriptional activator. We discuss how RemA affects gene expression in the context of biofilm formation, and its regulatory interplay with established components of the biofilm regulatory network, such as SinR, SinI, SlrR, and SlrA. We emphasize the additional role of RemA played in nitrogen metabolism and osmotic‐stress adjustment. (shrink)

Name der Zeitschrift: Semiotica Jahrgang: 2015 Heft: 204 Seiten: 145-172.

It seems a generally acknowledged view that physics is confined to the investigation of events that can be reproduced. “The natural scientist — says Pauli1 — is concerned with a particular kind of phenomena … he has to confine himself to that which is reproducible… I do not claim that the reproducible by itself is more important than the unique. But I do claim that the unique exceeds the treatment by scientific method. Indeed it is the aim of this method (...) to find and to test natural laws…” Here for Pauli as for everybody else a natural law is a statement expressing a regularity more or less directly related to repeatable events. And one may add that it is not only the possibility of testing that is responsible for our demand of reproducibility. Rather it is the very fact of regularity expressed in it that gives a natural law its dignity and makes it a subject worth studying on its own account. (shrink)

In this paper I argue that the almost forgotten early dissertation of the phenomenologist Hans Reiner Freiheit, Wollen und Aktivität. Phänomenologische Untersuchungen in Richtung auf das Problem der Willensfreiheit engages with what I call the unity problem of activity. This problem concerns the question whether there is a structure in virtue of which all instances of human activity—and not only “full-blown” intentional actions—can be unified. After a brief systematic elucidation of this problem, which is closely related to the contemporary “problem (...) of action,” I elaborate and critically discuss two relevant threads running through Reiner’s work. The first view concerns the alleged motivational asymmetry between activity and passivity according to which it is essential only for active experiences to be motivated by an underlying passivity. The second view focuses on Reiner’s phenomenology of the will, especially on his notions of “ego-centrality” and “inner will” the latter being introduced in analogy to Brentano’s notion of “inner consciousness.” These two notions are supposed to unify all manifestations of the human will, including “full-blown” intentional actions and non-intentional doings such as laughter. Reiner’s extension of will-based actions to non-intentional activity is one of the most remarkable aspects of his early work. Finally, I show that Reiner ultimately answers the unity problem in the negative because he ends up with the view that besides will-based agency he also acknowledges so-called “motor activity” which is not intrinsically related to the will. I close with a couple of tentative proposals how volitional and motor actions might be unified nonetheless. (shrink)

Domestizierung lässt sich durch einen Nukleus aus drei technischen Tätigkeiten definieren: durch die gesteuerte Reproduktion, die eigens eingerichtete Ernährung und den Schutz von Tieren und Pflanzen vor Schädigungen. Wenn man diese Definition an einen Vergleich von Kulturen und Kollektiven anlegt, stellen sich zwei Überraschungen ein: Außerhalb jeder Domestizierung entwickeln Wildbeuter eine rituelle Domestizierung oder ein mythologisches Verständnis, ihre Welt sei bereits domestiziert. Und in der Moderne tritt an die Seite der technischen Domestizierung ihre mögliche Naturalisierung. Der Aufsatz zieht einige Konsequenzen (...) aus diesem typologischen Vergleich. (shrink)