1,722,515 research outputs found
Theorem of Bernstein-Doetsch in Baire spaces
No full textTheorem of Bernstein and Doetsch is one of the most important in the theory of
convex (or convex in the sense of Jensen) functions. In this paper it is shown that the original proof
of Bernstein and Doetsch of this theorem can be adapted in a more general situation. Also some
parts of the proof may be of interest for themselves
Widen Field Test Pressure Data - P02 Experiment
No full textHydraulic tomography data from the crosswell pressure test P02.
The data are referenced in the paper:
Vasco, D. W., J. Doetsch, and R. Brauchler (2018). An extended trajectory-mechanics approach for calculating the path of a pressure transient: Hydraulic tomographic imaging, Water Resources Research, (submitted)
and in
Lochbuhler, T., J. Doetsch, R. Brauchler, and N. Linde (2013). Structure-coupled joint inversion of geophysical and hydrological data, Geophysics, 78, ID1-ID14, doi: 10.1190/GEO2012-0460.
Bernstein-Doetsch type results for (k;h)-convex functions
No full textIn this paper we define the so-called (k; h)-convex function which is a natural generalization of the usual convexity, the s-convexity in the first and second sense, the h-convexity, the Godunova-Levin functions and the P-functions.
Some regularity and Bernstein-Doetsch type results are investigated for (k; h)-convex functions
Generalized focusing of time-lapse changes with applications to direct current and time-domain induced polarization inversions
No full textOften in geophysical monitoring experiments time-lapse inversion models vary too smoothly
with time, owing to the strong imprint of regularization. Several methods have been proposed
for focusing the spatiotemporal changes of the model parameters. In this study, we present two
generalizations of the minimum support norm, which favour compact time-lapse changes and
can be adapted to the specific problem requirements. Inversion results from synthetic direct
current resistivity models that mimic developing plumes show that the focusing scheme significantly improves size, shape and magnitude estimates of the time-lapse changes. Inversions
of the synthetic data also illustrate that the focused inversion gives robust results and that the
focusing settings are easily chosen. Inversions of full-decay time-domain induced polarization
(IP) field data from a CO2 monitoring injection experiment show that the focusing scheme
performs well for field data and inversions for all four Cole–Cole polarization parameters.
Our tests show that the generalized minimum support norms react in an intuitive and predictable
way to the norm settings, implying that they can be used in time-lapse experiments
for obtaining reliable and robust results
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Frühneuzeitliche Räume des Visuellen: Zur Medialität des Spiegels in Garcilaso de la Vegas Égloga II
No full textKramer K. Frühneuzeitliche Räume des Visuellen: Zur Medialität des Spiegels in Garcilaso de la Vegas Égloga II . In: Dünne J, Doetsch H, Lüdeke R, eds. Von Pilgerwegen, Schriftspuren und Blickpunkten. Raumpraktiken in medienhistorischer Perspektive . Würzburg: Königshausen & Neumann; 2004: 99-121
Variations on the Author
No full text“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
- …
