The origin of the spacetime metric: Bell's `Lorentzian pedagogy' and its significance in general relativity

The purpose of this paper is to evaluate the `Lorentzian pedagogy' defended by J.S. Bell in his essay ``How to teach special relativity'', and to explore its consistency with Einstein's thinking from 1905 to 1952. Some remarks are also made in this context on Weyl's philosophy of relativity and his 1918 gauge theory. Finally, it is argued that the Lorentzian pedagogy - which stresses the important connection between kinematics and dynamics - clarifies the role of rods and clocks in general relativity.Comment: To be published in ``Physics Meets Philosophy at the Planck Length'', C. Callender and N. Huggett (eds.), Cambridge University Press (1999). 22 pages, no figures, LaTeX, uses harvard.sty; 3 references added, typos corrected and minor changes to conten

The Re-Figuration of Spaces and Refigured Modernity - Concept and Diagnosis

In this essay we want to make a contribution to developing further the spatial research in social theory by looking at spatial processes of change and the tensions involved conceptually and diagnostically as re-figuration of spaces. Starting from an outline of the key concept “re-figuration,” we go on to argue that re-figuration is not just a general concept adapted to spaces, but a fundamental spatio-temporal concept. In a third and fourth part we will address relations between spatial figures and introduce empirically sensitizing hypotheses on mediatization, translocalization, and polycontexturalization in order to show tendencies in the dynamics of change. We will speak of “re-figuration” to refer to various socio-historical processes of spatial change, while “refigured modernity” refers to the diagnosis of the increasing tension between different dominant social figuration as the reason for the current re-figuration which will be outlined on the basis of recent research

A new perspective on steady-state cosmology: from Einstein to Hoyle

We recently reported the discovery of an unpublished manuscript by Albert Einstein in which he attempted a 'steady-state' model of the universe, i.e., a cosmic model in which the expanding universe remains essentially unchanged due to a continuous formation of matter from empty space. The manuscript was apparently written in early 1931, many years before the steady-state models of Fred Hoyle, Hermann Bondi and Thomas Gold. We compare Einstein's steady-state cosmology with that of Hoyle, Bondi and Gold and consider the reasons Einstein abandoned his model. The relevance of steady-state models for today's cosmology is briefly reviewed.Comment: To be published in the 'Proceedings of the 2014 Institute of Physics International Conference on the History of Physics', Cambridge University Press. arXiv admin note: substantial text overlap with arXiv:1504.02873, arXiv:1402.013

History, Space and Place

Spaces, too, have a history. And history always takes place in spaces. But what do historians mean when they use the word ""spaces""? And how can spaces be historically investigated? Susanne Rau provides a survey of the history of Western concepts of space, opens up interdisciplinary approaches to the phenomenon of space in fields ranging from physics and geography to philosophy and sociology, and explains how historical spatial analysis can be methodologically and conceptually conceived and carried out in practice. The case studies presented in the book come from the fields of urban history, the history of trade, and global history including the history of cartography, but its analysis is equally relevant to other fields of inquiry. This book offers the first comprehensive introduction to the theory and methodology of historical spatial analysis. Supported by Open Access funds of the University of Erfur

The Reconstruction of a Samoan Village: Quest for the spatial narration of the mythological origin and the social structure of Poutasi

In 2009 the traditional village centre of Poutasi was destroyed by a tsunami and a majority of the inhabitants since then have abandoned the old settlement. Only a few of the former residents repaired or reconstructed their houses at the traditional site at and around the village square; most of them decided to adopt a settlement development which increasingly took into account a persistent trend: to meet the requirements of modern mobility and to live at or near the road. As a result of this shift the village has lost its traditional public space - the village square - but at the same time it has not found a similar place at the road. Although most central institutions of the village and the district today are located at the main road within a small distance from each other, there is no public square where people can meet, communicate and celebrate their festivities as they were used to doing at the traditional square. The loss of the traditional village centre is not only a loss of sociability, but also a loss of the social identity of the village: The traditional village square and its surrounding buildings once reflected the mythological origin and the social structure of the village as described by the Samoan mythology and documented in the faalupega, the archives of the Samoan society. The loss of the traditional village centre of Poutasi means the loss of an important part of the Samoan spatial archives including sociality

Ortsbezogene Anwendungen und Dienste: 9. Fachgespräch der GI/ITG-Fachgruppe Kommunikation und Verteilte Systeme ; 13. & 14. September 2012

Der Aufenthaltsort eines mobilen Benutzers stellt eine wichtige Information für Anwendungen aus den Bereichen Mobile Computing, Wearable Computing oder Ubiquitous Computing dar. Ist ein mobiles Endgerät in der Lage, die aktuelle Position des Benutzers zu bestimmen, kann diese Information von der Anwendung berücksichtigt werden -- man spricht dabei allgemein von ortsbezogenen Anwendungen. Eng verknüpft mit dem Begriff der ortsbezogenen Anwendung ist der Begriff des ortsbezogenen Dienstes. Hierbei handelt es sich beispielsweise um einen Dienst, der Informationen über den aktuellen Standort übermittelt. Mittlerweile werden solche Dienste kommerziell eingesetzt und erlauben etwa, dass ein Reisender ein Hotel, eine Tankstelle oder eine Apotheke in der näheren Umgebung findet. Man erwartet, nicht zuletzt durch die Einführung von LTE, ein großes Potenzial ortsbezogener Anwendungen für die Zukunft. Das jährlich stattfindende Fachgespräch "Ortsbezogene Anwendungen und Dienste" der GI/ITG-Fachgruppe Kommunikation und Verteilte Systeme hat sich zum Ziel gesetzt, aktuelle Entwicklungen dieses Fachgebiets in einem breiten Teilnehmerkreis aus Industrie und Wissenschaft zu diskutieren. Der vorliegende Konferenzband fasst die Ergebnisse des neunten Fachgesprächs zusammen.The location of a mobile user poses an important information for applications in the scope of Mobile Computung, Wearable Computing and Ubiquitous Computing. If a mobile device is able to determine the current location of its user, this information may be taken into account by an application. Such applications are called a location-based applications. Closely related to location-based applications are location-based services, which for example provides the user informations about his current location. Meanwhile such services are deployed commercially and enable travelers for example to find a hotel, a petrol station or a pharmacy in his vicinity. It is expected, not least because of the introduction of LTE, a great potential of locations-based applications in the future. The annual technical meeting "Location-based Applications and Services" of the GI/ITG specialized group "Communication and Dsitributed Systems" targets to discuss current evolutions in a broad group of participants assembling of industrial representatives and scientists. The present proceedings summarizes the result of the 9th annual meeting

Communicative Constructions and the Refiguration of Spaces

The Open Access version of this book, available at www.taylorfrancis.com , has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license Through a variety of empirical studies, this volume offers fresh insights into the manner in which different forms of communicative action transform urban space. With attention to the methodological questions that arise from the attempt to study such changes empirically, it offers new theoretical foundations for understanding the social construction and reconstruction of spaces through communicative action. Seeing communicative action as the basic element in the social construction of reality and conceptualizing communication not only in terms of the use of language and texts, but as involving any kind of objectification, such as technologies, bodies and non-verbal signs, it considers the roles of both direct and mediatized (or digitized) communication. An examination of the conceptualization of the communicative (re-)construction of spaces and the means by which this change might be empirically investigated, this book demonstrates the fruitfulness of the notion of refiguration as a means by which to understand the transformation of contemporary societies. As such, it will appeal to sociologists, social theorists, and geographers with interests in social construction and urban space