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    Time‐continuous and time‐discontinuous space‐time finite elements for advection‐diffusion problems

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    We construct four variants of space-time finite element discretizations based on linear tensor-product and simplex-type finite elements. The resulting discretizations are continuous in space, and continuous or discontinuous in time. In a first test run, all four methods are applied to a linear scalar advection-diffusion model problem. Then, the convergence properties of the time-discontinuous space-time finite element discretizations are studied in numerical experiments. Advection velocity and diffusion coefficient are varied, such that the parabolic case of pure diffusion (heat equation), as well as, the hyperbolic case of pure advection (transport equation) are included in the study. For each model parameter set, the error at the final time is computed for spatial and temporal element lengths ranging over several orders of magnitude to allow for an individual evaluation of the methods' spatial, temporal, and space-time accuracy. In the parabolic case, particular attention is paid to the influence of time-dependent boundary conditions. Key findings include a spatial accuracy of second order and a temporal accuracy between second and third order. The temporal accuracy tends toward third order depending on how advection-dominated the test case is, on the choice of the specific discretization method, and on the time-(in)dependence and treatment of the boundary conditions. Additionally, the potential of time-continuous simplex space-time finite elements for heat flux computations is demonstrated with a piston ring pack test case and a subtractive manufacturing test case.dtec.bw – Digitalization and Technology Research Center of the Bundeswehr. dtec.bw is funded by the European Union – NextGenerationEUUniversity of the Bundeswehr Munic

    Good governance in the hand of the judiciary: Lessons from the European example

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    This note is based on the author’s guest presentation delivered at the Konrad-Adenauer Foundation/North-West University (Faculty of Law) Colloquium on 21 August 2009. Justice von Danwitz was invited to set the scene for further academic discourse on the broad topic of Good Governance and Sustainable Development. This contribution hence draws on the author’s personal views and experience in the European context, and it is shown that the quest for good governance is universal and not specific to our times and that in fact, “(t)he true administration of justice is the firmest pillar of good government”. The contribution considers what Europe has been able to realize in this field over the past 10 years by means of a description of the legal concepts and practical consequences of the quest for good governance in the European Union and some comments on the role of the judiciary in this process. The contribution serves to show that good government is a notion of which the meaningtranscends geographical and jurisdictional borders and that it is possible for different countries and regions to exchange lessons and learning experiences in relation to good government in operation as well as the role of good government towards the achievement of sustainable development.Keywords: good government, good governance, role of judiciary in goodgovernance; European Union perspective

    Good Governance in the Hands of the Judiciary: Lessons from the European Example

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    This note is based on the author’s guest presentation delivered at the Konrad-Adenauer Foundation/North-West University (Faculty of Law) Colloquium on 21 August 2009. Justice von Danwitz was invited to set the scene for further academic discourse on the broad topic of Good Governance and Sustainable Development. This contribution hence draws on the author’s personal views and experience in the European context, and it is shown that the quest for good governance is universal and not specific to our times and that in fact, “(t)he true administration of justice is the firmest pillar of good government”. The contribution considers what Europe has been able to realize in this field over the past 10 years by means of a description of the legal concepts and practicalconsequences of the quest for good governance in the European Union and some comments on the role of the judiciary in this process. The contribution serves to show that good government is a notion of which the meaning transcends geographical and jurisdictional borders and that it is possible for different countries and regions to exchange lessons and learning experiences in relation to good government in operation as well as the role of good government towards the achievement of sustainable development

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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