1,722,764 research outputs found
On master test plans for the space of BV functions
No full textNobili F, Pasqualetto E, Schultz T. On master test plans for the space of BV functions. Advances in Calculus of Variations . 2022.We prove that on an arbitrary metric measure space a countable collection of test plans is sufficient to recover all BV functions and their total variation measures. In the setting of non-branching CD(K, N) spaces (with finite reference measure), we can additionally require these test plans to be concentrated on geodesics
Schultz, T.: Die Großpilzflora des Nationalparks Harz
Full text linkBUCHBESPRECHUNG
Schultz, T.: Die Großpilzflora des Nationalparks Harz. – Schriftenreihe aus dem Nationalpark Harz, Band 5, 2010. 216 S., 128 Abbildungen. – Ohne ISBNNummer.Preis 15 Euro, zuzüglich Versandkosten (Bezugsmöglichkeit über:Nationalparkverwaltung Harz, Lindenallee 35, D-38855 Wernigerode oder [email protected])Die Schlechtendalia publiziert Originalbeiträge mit Schwerpunkt Spezielle Botanik und Biodiversität, Floristik, Mykologie/Lichenologie, Wissenschaftsgeschichte und andere Themen mit Bezug zu Botanischen Gärten und Herbarien
Economic Factors Affecting Population Growth: A Preliminary Survey of Economic Analyses of Fertility
No full textSchultz, T. Paul. (1973). Economic Factors Affecting Population Growth: A Preliminary Survey of Economic Analyses of Fertility. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/54656
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Dynamische Modellierung und Simulation von Direkt-Methanol-Brennstoffzellen auf Basis der verallgemeinerten Maxwell-Stefan-Transportgleichungen
No full textDie Direkte Methanol-Brennstoffzelle (DMFC) ist ein vielversprechender Ansatz für eine mobile Quelle elektrischer Energie. Insbesondere ist der Energieträger ("Brennstoff") Methanol weitaus handhabungsfreundlicher als Wasserstoffgas, was Vorteile insbesondere bei kleinen Brennstoffzellensystemen bedeutet (kompaktere Abmessungen des Tanks wegen hoher Energiedichte des Methanols, kein Drucktank, einfacheres Nachtanken als bei Wasserstoff, weniger Probleme hinsichtlich Sicherheitsaspekten). Demgegenüber erreicht die DMFC jedoch deutlich geringere Leistungsdichten, als die mit Wasserstoff versorgten Polymerelektrolytmembran-Brennstoffzellen (PEMFC). Die wesentlichen Gründe hierfür sind die langsamere Reaktionskinetik der elektrochemischen Methanoloxidation verglichen mit der elektrochemischen Wasserstoffoxidation sowie der unerwünschte Durchtritt von Methanol und Wasser durch die ionenleitende Membran (PEM) von der Anode zur Kathode (sog. Crossover-Effekt) [1]. Die Stofftransportvorgänge im Inneren der Membran werden mit Hilfe von mathematischen Modellen analysiert, welche auf den verallgemeinerten Maxwell-Stefan-Gleichungen basieren. Die Simulationsergebnisse werden mit experimentellen Bilanzdaten verglichen, die an einer vollautomatischen Miniplant-Anlage gewonnen wurden. Diese Anlage erfasst über eine Reihe von Online- Sensoren alle relevanten Stoffströme, welche in die Brennstoffzelle eintreten bzw. sie verlassen. Zusammen mit dem gemessenen elektrischen Zellstrom können aus diesen Informationen sämtliche innerhalb der Brennstoffzelle fliessenden Stoffströme berechnet werden, insbesondere die Crossover-Ströme von Methanol und Wasser durch die Membran [2]. Die daraus gewonnenen Stofftransportparameter werden in einem Gesamtmodell der DMFC verwendet, mit welchem schliesslich Simulationsrechnungen zum Betriebsverhalten der DMFC durchgeführt wurden. Besonderes Augenmerk liegt hierbei auf dem dynamischen Antwortverhalten, z.B. unter Einfluss von Lastwechseln oder bei geänderter Brennstoffzufuhr. Literatur: [1] Schultz T, Zhou S, Sundmacher K, Chem. Eng. & Techn. 24 (2001) 12 [2] Schultz T, Dissertationsschrift in Vorbereitung, O.-v.-G. Universität Magdeburg (2003
Variations on the Author
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
The reasons for change of privacy practices in public space: A cross-cultural study.
No full textAkca, E., Göregenli, M., Bonaiuto, M. (2017). The reasons for change of privacy practices in public space: A cross-cultural study. Abstract of poster at International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña, Spain, August 30 – 31 September 1, 2017. “. Abstract pubbl. in R. Mira, W. Schultz, T. Hartig, L. Steg (Eds.), Book of Abstracts. International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña: Instituto de Estudios e Investigación psicosocial Xoan Vicente Viqueira (p. 333). ISBN 978-84-932694-9-4
Protecting the environment for selfish reasons: Altruism is not the only pathway to sustainability.
No full textDe Dominicis, S., Schultz, W., Bonaiuto, M. (2017). Protecting the environment for selfish reasons: Altruism is not the only pathway to sustainability. Abstract of presentation at International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña, Spain, August 30 – 31 September 1, 2017. “. Abstract pubbl. in R. Mira, W. Schultz, T. Hartig, L. Steg (Eds.), Book of Abstracts. International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña: Instituto de Estudios e Investigación psicosocial Xoan Vicente Viqueira (p. 241-242). ISBN 978-84-932694-9-
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