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Article
Open AccessHamiltonian formulation of general relativity and post-Newtonian dynamics of compact binaries
Hamiltonian formalisms provide powerful tools for the computation of approximate analytic solutions of the Einstein field equations. The post-Newtonian computations of the explicit analytic dynamics and motion...
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Ambivalenzen einer soziologischen Beziehung: Ralf Dahrendorf und Helmut Schelsky
Der Artikel unternimmt den Versuch, einige Aspekte im soziologischen Beziehungsverhältnis von Helmut Schelsky und Ralf Dahrendorf seit den 1950er Jahren zu rekonstruieren. In den drei Etappen des »nahfernen« V...
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Living Reference Work Entry In depth
Geschichte der Armut im abendländischen Kulturkreis
Armut ist eine relative, in den jeweiligen politischen, ökonomischen, sozialen und kulturellen Kontext eingebettete Größe. Im abendländischen Kulturkreis, dessen Einheit im Christentum wurzelte, war Armut allg...
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Das Weltkind in der Mitten. Zu Franziska Meiforts Biographie über Ralf Dahrendorf (1929–2009)
Franziska Meifort, Ralf Dahrendorf. Eine Biographie, München: C.H.Beck Verlag 2017, 477 Seiten.
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„Zum Schicksal der deutschen Soziologie im Ausgang ihrer bürgerlichen Epoche“
Die Göttinger Untersuchungen ‚Zur Lage der deutschen Hochschullehrer‘ sind die erste große soziologische Studie zur Lehrkörperstruktur und zur Situation des wissenschaftlichen Nachwuchses an westdeutschen Hoch...
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Article
Open AccessHamiltonian formulation of general relativity and post-Newtonian dynamics of compact binaries
Hamiltonian formalisms provide powerful tools for the computation of approximate analytic solutions of the Einstein field equations. The post-Newtonian computations of the explicit analytic dynamics and motion...
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Article
Evaluation of VOC fluxes at the soil-air interface using different flux chambers and a quasi-analytical approach
Dense nonaqueous-phase liquids (DNAPLs) spilled on the soil migrate vertically depending upon gravity and capillary forces through the unsaturated zone of the porous aquifer, forming a vapour plume. These vola...
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Article
Highly gravity-driven flow of a NAPL in water-saturated porous media using the discontinuous Galerkin finite-element method with a generalised Godunov scheme
In this paper, we develop an implementation of gravity effects within a Global Pressure formulation in a numerical scheme based on the implicit pressure explicit saturation (IMPES) approach. We use the Discont...
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Helmut Schelsky: Über die Aufgabe empirischer Sozialforschung heute
Welche Aufgabe hat heute die empirisch sozialwissenschaftliche Forschung? Das ist schließlich die Grundfrage, die man sich stellen muß, wenn man die wissenschaftliche Leitung eines der größten sozialwissenscha...
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»Über die naive Phase empirischer Sozialforschung hinaus …«
Helmut Schelsky (1912 – 1984) hatte zum Ende seiner Hamburger Wirkungsphase eine theoretische »Ortsbestimmung der deutschen Soziologie» (Schelsky 1959) vorgelegt, die im disziplinären Feld der Soziologie für A...
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Ein lange verschüttetes Dokument – Helmut Schelskys Habilitationsvortrag vom 22. 2. 1939 – eine biographische und wissenschaftsgeschichtliche Einordnung
Helmut Schelsky hat in seinem Brief an Rainer M. Lepsius von 1980 unter anderem auch seinen Habilitationsvortrag vom 22. Februar 1939 vor der Philosophischen Fakultät der Universität Königsberg erwähnt. Sein H...
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Higher Order Post-Newtonian Dynamics of Compact Binary Systems in Hamiltonian Form
The Hamiltonian formalism developed by Arnowitt, Deser, and Misner (ADM) is used to derive and discuss the higher order post-Newtonian dynamics and motion of compact binary systems in general relativity includ...
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Hamiltonian Formalism for Spinning Black Holes in General Relativity
A Hamiltonian treatment of gravitationally interacting spinning black holes is presented based on a tetrad generalization of the Arnowitt-Deser-Misner (ADM) canonical formalism of general relativity. The forma...
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Article
S. Kopeikin, M. Efroimsky and G. Kaplan: Relativistic celestial mechanics of the solar system
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Prediction of Vertical DNAPL Vapour Fluxes in Soils Using Quasi-Analytical Approaches: Bias Related to Density-Driven and Pressure-Gradient-Induced Advection
This study focuses on a detailed analysis of the errors introduced by two quasi-analytical approaches based on either Fick’s first law or a combination of Fick’s and Darcy’s laws to evaluate the vapour flux of...
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Post-Newtonian Methods: Analytic Results on the Binary Problem
A detailed account is given on approximation schemes to the Einstein theory of general relativity where the iteration starts from the Newton theory of gravity. Two different coordinate conditions are used to r...
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Gravitomagnetism in Physics and Astrophysics
Based on general relativity, the article reviews gravitomagnetism in physics and astrophysics. Emphasis is put on observational effects. Accelerated reference frames in flat spacetime are discussed to illumina...
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Article
Gravitomagnetism in Physics and Astrophysics
Based on general relativity, the article reviews gravitomagnetism in physics and astrophysics. Emphasis is put on observational effects. Accelerated reference frames in flat spacetime are discussed to illumina...
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Article
A canonical dynamics view of the Newtonian limit of general relativity
The Newtonian limit of general relativity was Jürgen Ehlers favourite model for limit relations between theories of physics. In this contribution, for the case of isolated systems, the Newtonian limit of gener...
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Propagation of Light in the Gravitational Field of Binary Systems to Quadratic Order in Newton's Gravitational Constant
The propagation of light is treated in the postlinear gravitational field of binary systems. The light deflection is calculated to quadratic order in Newton’s gravitational constant and fourth order in the inv...
